Novel track layer for urban track traffic engineering and its construction method

Abstract

It relates to the engineering technology science, in particular to a novel track layer for urban rail traffic engineering and its construction method. The novel track layer comprises lifting and walking trolleys, a connecting truss beam, a track running mechanism and a supporting structure. Horizontal extending and vertical supporting structures of each lifting and walking trolley are operated firstly so as to lift the whole novel track layer to a height at which a track material is hoisted and unloaded. A hoisting car is used to lift up the track material to leave from a flat trunk and a material supporting cushion. The novel track layer continues to walk forward to a designed mounting position of a track section, and then the track material is unloaded. Steel tracks are connected and a temporary track section support is mounted to fix a newly mounted track section.

What is claimed is: 
     
         1 . The track layer for urban track transit engineering, comprising lifting and walking trolleys, a connecting truss beam, crawler running mechanisms and supporting structures, wherein the novel track layer consists of two lifting and walking trolleys and a connecting truss beam connecting the two lifting and walking trolleys; each lifting and walking trolley consists of a running car, and a horizontal frame beam for the running car to move longitudinally; the supporting structure capable of horizontally extending to both sides of a main line track and having the vertical lifting and walking trolley is mounted at the front and rear ends of the horizontal frame beam respectively; each running car consists of a frame structure, track running wheels, and the crawler running mechanism mounted in the center of a planar frame structure of the running car; the novel track layer walks on the main line track through the track walking wheels in a section having the main line track, and walks on a structural floor through the crawler running mechanisms in a section free of the main line track; each horizontally extendable and vertically liftable supporting structure is used for the switching of the novel track layer between the section having the main line track and the section free of the main line track. 
     
     
         2 . The novel track layer for urban track transit engineering according to  claim 1 , wherein a latch hook by which the novel track layer and a towing vehicle are connected is mounted outside the horizontal frame beam; a hydraulic pump station and a power supply cable reel which are used for hydraulic operation of each lifting and walking trolley are mounted on an upper reinforcing structure frame of the horizontal frame beam; the two lifting and walking trolleys are connected by the connecting truss beam together to form a complete machine; a hoisting car for hoisting materials is mounted on the connecting truss beam; the hoisting car is towed by a windlass to walk back and forth along the truss beam to achieve precise lifting and positioning of track materials. 
     
     
         3 . The novel track layer for urban track transit engineering according to  claim 1 , wherein the horizontal frame beam consists of a plurality of longitudinal beams, a plurality of crossbeams and an upper reinforcing structure; each longitudinal beam acts both as a structural beam of the horizontal frame beam and as a guide column for the running car to move back and forth; each crossbeam acts both as a structural beam of the horizontal frame beam and as a guide sleeve structure for a vertical supporting structure of the lifting and walking trolley to extend horizontally and laterally; a reinforcing structure is mounted on the upper part of the horizontal frame beam to ensure the longitudinal rigidity and the lateral rigidity of the horizontal frame beam; a horizontal extension mechanism perpendicular to a line direction is mounted in each crossbeam; each horizontal extension mechanism consists of a guide column and a vertical guide sleeve; the horizontal extension mechanisms cooperate by means of the guide columns and the guide sleeve structures; horizontal and lateral extension is achieved by a hydraulic drive cylinder; the vertical supporting structure consisting of a second guide column, a first guide column and a first hydraulic drive cylinder is mounted in each guide column, wherein the second guide column acts as a guide sleeve of the first guide column; the vertical supporting structure is realized in such a manner that the first hydraulic drive cylinder drives the first guide column and the second guide column to extend step by step. 
     
     
         4 . The novel track layer for urban track transit engineering according to  claim 1 , wherein the running car consists of a frame structure, track running wheels and a crawler running mechanism mounted in the center of a planer frame structure of the running car; the frame structure consists of two guide sleeves, track running wheels and a connection structure component; the running car is sleeved on the horizontal frame beam of the lifting and walking trolley through the guide sleeves; forward and backward movements of the running car along the horizontal frame beam is achieved by a second hydraulic drive cylinder; the track running wheels of the running car are driven by a motor to walk on the main line track; the crawler running mechanism is mounted in the center of the upper plane of the running car and is fixed on a lower structural floor of the running car through a rotary disk; the crawler running mechanism extends upwards and downwards through the guide sleeve and the guide column; the extendable guide sleeve is fixed on the rotary disk; a steering drive ball pin is mounted on the upper plane of the rotary disk; upward and downward extension of the guide column is achieved by a third hydraulic drive cylinder; the crawler running mechanism is connected with the guide column through a pin shaft; the crawler running mechanism consists of a chassis, a driving wheel, a guide wheel, a thrust wheel, a towing wheel and a crawler, and a hydraulic drive motor; a rotating disk capable of rotating around the center of the running car is further mounted on the upper plane of the running car; the rotating disk rotates around the center of the car through a roller; a hinging base is mounted on the rotating disk and is connected to the connecting truss beam through a hinge pin. 
     
     
         5 . The novel track layer for urban track transit engineering according to  claim 1 , wherein the connecting truss beam is formed by welding steel tubes, is divided into three sections and has a cross-section shaped as a Chinese character “Yi” (chair) and is arranged symmetrically in left and right sides; the three sections are connected by connecting pins; a track for the hoisting car to walk is mounted on the connecting truss beam; a windlass and a pulley block are mounted at two ends of the connecting truss beam and used for towing the hoisting car to move back and forth along the track; a hydraulically driven hydraulic pump station and a cable reel are mounted on the upper reinforcing structure of the horizontal frame beam of the hoisting and walking trolley and used for providing hydraulic pressure and electric power for the novel track layer. 
     
     
         6 . A construction method of the novel track layer for urban track transit engineering according to  claim 1 , the construction method for the track layer comprises the following steps: when the novel track layer unloads a track section from a track section truck, operating horizontally extendable and vertical supporting structures of each lifting and walking trolley firstly so as to lift the whole novel track layer to a height at which a track material is hoisted and unloaded; pushing a flat truck that transports the track material to a position under the connecting truss beam of the novel track layer; lifting up the track material by the hoisting car to leave from the flat trunk and a material supporting cushion; enabling the flat truck to exit from the position below the novel track layer; operating the vertical supporting structure of the lifting and walking trolley to enable the novel track layer to descend together with the track material, such that the running car of the novel track layer falls on the main line track stably to finish unloading; when the novel track layer walks to the vicinity of a mounting position along the main line track and the front lifting and walking trolley arrives at a gear at the end of the main line track, operating the vertical supporting structure of the lifting and walking trolley to make the running car away from the track; operating a longitudinal movement control device of the lifting and walking trolley to move the running car out of the main line track; operating a crawler running control device to lower the crawler running mechanism and to be supported on the structural floor; recovering a lifting mechanism to an initial retraction position; enabling the novel track layer to continue to walk forward to a designed mounting position of the track section, and then unloading the track material; connecting steel rails and mounting a temporary track section support to fix a newly mounted track section; reversely operating control devices for lifting, mechanism switching and longitudinal movement of the novel track layer to return the novel track layer to the main line track; enabling the track layer to continue to walk towards a track section hoisting position in next time to arrive at an unloading place; and hoisting the track section to the next cycle 
     
     
         7 . The construction method of the novel track layer for urban track transit engineering according to  claim 6 , the specific construction method is as follows:
 A. lapping, hoisting and transporting works of track sections   (1) operating the novel track layer to a track section unloading position; operating horizontally extendable vertical supporting structures of the No. 1 lifting and walking trolley and the No. 2 lifting and walking trolley respectively to make the vertical supports to extend to two sides of a line, with an extension distance satisfying the width and safety distance requirements of the flat truck for track section transportation and the loaded material; and performing a locking operation after the safety is ensured;   (2) operating the horizontally extendable vertical supporting structures of the No. 1 lifting and walking trolley and the No. 2 lifting and walking trolley respectively to make the vertical supports to extend downwards; enabling a lower support foot plate of each vertical support to be stably supported on the track bed that has reached a desired strength, or the structural floor, and ensuring the force to be distributed uniformly; synchronously continuing to operate the horizontally extendable vertical supporting structures of the No. 1 lifting and walking trolley and the No. 2 lifting and walking trolley respectively to make the vertical supports continuously extend downwards; since the counteraction of the support from the floor makes the No. 1 lifting and walking trolley and the No. 2 lifting and walking trolley and the connecting hoisting truss beam to lift slowly upwards, stopping operating after the hoisting height is reached, re-checking whether the vertical supporting structures of the lifting and walking trolleys are stably supported and stressed uniformly, and then locking;   (3) directing a track towing vehicle to push the flat truck that transports the track material to slowly enter a position under the novel track layer, and stopping pushing and performing parking brake when the track section completely enters the space under the connecting hoisting truss beam;   (4) operating hoisting cars on the crossbeams of the connecting truss beam of the novel track layer respectively to be aligned to hoisting-point positions at which the track material is hoisted; lowering a hoisting carrying-pole to connect a hook and the track section; operating the hoisting cars respectively such that they are stressed at hoisting points; re-checking vertical support feet of the novel track layer to ensure that they are firm; synchronously operating the hoisting cars to hoist the track material slowly; stopping lifting after the track material is completely detached from the fulcrum on a bogie supporting structure on the flat truck by a safety distance, and performing a locking operation; starting the track towing vehicle to make it tow the flat truck slowly to drive away from the new track layer by a certain distance, and then stopping or returning to a base for transportation of the next track section;   (5) synchronously operating the horizontally extendable vertical supporting structures of the No. 1 and No. 2 lifting and walking trolleys reversely such that the vertical supports retract upwards, so that the No. 1 and No. 2 lifting and walking trolleys in this case descend to the main line track slowly together with the connecting truss beam and the hoisted track material;   continuously operating the horizontally extendable vertical supporting structures of the No. 1 and No. 2 lifting and walking trolleys reversely such that the vertical supports retract upwards and return to a transfer state of the novel track layer; performing a locking operation; adjusting the horizontally extendable vertical supporting structures of the No. 1 and No. 2 lifting and walking trolleys, such that a distance between the vertical support feet having the unified cross-section is greater than the width of the track material;   (6) operating a running device control system of the novel track layer such that the novel track layer hoists the track material to run to a designed mounting position along the main line track, and the novel track layer hoists the track material to pass through a section at which concrete pouring has been completed, a section at which no concentrate is poured and a section at which the track section is adjusted and fixed, and arrives at the end of the main line track;   (7) stopping running when the running car of the No. 2 lifting and walking trolley of the novel track layer arrives at a gear position at the end of the main line track;   B. running mechanism switching, moving and track section positioning works of the novel track layer   (1) when the running car of the No. 2 lifting and walking trolley of the novel track layer arrives at a gear at the end of the main line track and stops running, operating a longitudinal movement control device of the running vehicle of the No. 2 lifting and walking trolley, such that the horizontal frame structure of the lifting and walking trolley moves to a horizontal movement stop position relative to the running car in a direction in which no main line track is arranged, and stopping operating;   (2) operating the horizontally extendable vertical supporting structure of the No. 2 lifting and walking trolley to extend downward; enabling a lower support foot plate of the horizontally extendable vertical support to be stably supported on the structural floor, and ensuring the force to be distributed uniformly; continuing to operate the running car of the No. 2 lifting and walking trolley to lift upwards away from the tread of the main line track and to be higher than a gear height; then stopping lifting, and locking;   (3) synchronously operating a running car running drive device of the No. 1 lifting and walking trolley and a running wheel longitudinally movable control device of the No. 2 lifting and walking trolley, such that the No. 1 lifting and walking trolley, the connecting truss beam, the track material and the running car of the No. 2 lifting and walking trolley move in a direction in which no main line track is arranged; stopping operating when they arrive at a running car longitudinally movable stop position of the No. 2 lifting and walking trolley; locking such that a horizontal projection of the running car is completely out of the main line track;   (4) operating a crawler running mechanism lifting device in the running car of the No. 2 lifting and walking trolley, such that the crawler running mechanism descends slowly and is stably supported on the structural floor and stressed;   (5) operating the horizontally extendable vertical supporting structure of the No. 2 lifting and walking trolley, such that the horizontally extendable vertical supporting structure is completely separated from the structural floor by a certain height, then stopping operating, and locking;   (6) synchronously operating the running car running control device of the No. 1 lift and walking trolley and the crawler running control device of the No. 2 lift and walking trolley, such that the novel track layer runs in a direction in which no main line track is arranged; operating a crawler running direction control device of the No. 2 lifting and walking trolley to adjust a running direction of the No. 2 lifting and walking trolley and to ensure that the No. 2 lifting and walking trolley walks on the central line of the track; when the No. 1 lifting and walking trolley approaches to the end of the main line track, stopping running; checking the horizontal projection position of the track section and the connected position of the end of the mounted track section; completing alignment by moving the hoisting car if there is a little deviation in position, or completing alignment by moving the novel track layer if there is a great deviation;   (7) synchronously operating the hoisting car to lower the track section slowly to a designed mounting height; moving the hoisting car back and forth slightly; stopping operating after the newly mounted track section is aligned to the mounted track section;   (8) fixedly connecting joints of steel rails with a steel rail splint; mounting a temporary support or a track state adjusting frame at a set position on the track section; screwing up an adjusting nut to fix a spatial position of the newly mounted track section;   (9) operating a hoisting control device; disconnecting the hoisting carrying-pole from the track section; hoisting the hoisting carrying-pole to an upper limit position, and then stopping operating;   C. running mechanism switching of the novel track layer to lapping and hoisting position   (1) operating the novel track layer to run in a direction of the main line track, and stopping running when the end surface of the running crawler approaches to the end of the newly mounted track section;   (2) operating the running car longitudinally movable control device of the No. 2 lifting and walking trolley, such that the horizontal frame structure of the lifting and walking trolley moves to a longitudinal movement stop position relative to the running car in a direction of the main line track, and stopping operating;   (3) operating the horizontally extendable vertical supporting structure of the No. 2 lifting and walking trolley to extend downward; enabling the lower support foot plate of the horizontally extendable vertical supporting structure to be stably supported on the structural floor, and ensuring the force to be distributed uniformly; continuing to operate the running car of the No. 2 lifting and walking trolley to lift upwards to be higher than a gear height; then stopping lifting, and locking;   (4) operating the crawler running mechanism lifting device in the running car of the No. 2 lifting and walking trolley, such that the crawler running mechanism lifts slowly and is stably retracted at an upper limit position inside the running car; stopping operating, and locking;   (5) synchronously operating the running car running drive device of the No. 1 lifting and walking trolley and the running trolley longitudinally movable control device of the No. 2 lifting and walking trolley, such that the No. 1 lifting and walking trolley, the connecting truss beam, and the running car of the No. 2 lifting and walking trolley move in a direction of the main line track; stopping operating when they arrive at the longitudinal movement stop position of the running car of the No. 2 lifting and walking trolley; locking such that a horizontal projection of the running car in this case completely enters over the main line track;   (6) operating the horizontally extendable vertical supporting structure of the No. 2 lifting and walking trolley, such that the horizontally extendable vertical supporting structure retracts and the running car of the No. 2 lifting and walking trolley stably falls on the inside of the gear on the main line track; continuing to operate the horizontally extendable vertical supporting structure of the No. 2 lifting and walking trolley, such that the horizontally extendable vertical supporting structure completely retracts back to the upper stop position, then stopping operating, and locking;   (7) synchronously operating track running control devices of the No. 1 and No. 2 lifting and walking trolleys, such that the novel track layer returns to a position where a newly conveyed track section is received; preparing for next track section hoisting work; and   D. track section re-hoisting, transporting and mounting works of the novel track layer   repeating all the operations of step A-step C to complete track section re-hoisting, transportation and mounting and positioning of the novel track layer, and so on to complete the track construction.   
     
     
         8 . The construction method of the novel track layer for urban track transit engineering according to  claim 6 , wherein the specific construction method is as follows: a transfer work for working surfaces of the novel track layer, when there is a need to transfer to the new working surface after the completion of one working surface of the track construction, there are several cases: 1, a working position of another construction line in the same direction; 2, a working position of the other two construction lines in the opposite directions; the transfer of the novel track layer is realized by the traction of the track towing vehicle through a layed first track switch and a second track switch; the transfer of the work surface is carried out according to the following steps:
 (1) transfer to a working position in the construction site of another line in the same direction: withdrawing horizontal extension devices of the vertical supporting structures of the No. 1 and No. 2 lifting and walking trolleys of the novel track layer back to a running transfer position; withdrawing the vertical supporting structures back to an upper limit transfer running position, and locking; dismounting a power supply of the novel track layer, and rolling a cable into the cable reel; disconnecting the track running wheels of the novel track layer from the running drive speed reducer, such that they are at a neutral gear; connecting the novel track layer and the track towing vehicle with a connecting towing bar; starting the track towing vehicle to tow the novel track layer to run to a second track switch slowly; towing the novel track layer by the track towing vehicle to pass through the second track switch firstly; when the tail of the novel track layer arrives at a track switch annunciator and stops running, pulling the first track switch and the second track switch to open a lateral passage track of the track switches; starting the track towing vehicle, such that the track towing vehicle pushes the novel track layer to pass through the second track switch and the first track switch and to enter the main line and to arrive at a new working surface to complete the transfer work;   (2) transfer to a new working surface in a reverse direction: withdrawing horizontal extension devices of the vertical supporting structures of the No. 1 and No. 2 lifting and walking trolleys of the novel track layer back to a running transfer position; withdrawing the vertical supporting structures back to an upper limit transfer running position, and locking; dismounting the power supply of the novel track layer, and rolling the cable into the cable reel; disconnecting the track running wheels of the novel track layer from the running drive speed reducer, such that they are at a neutral gear; connecting the novel track layer and the track towing vehicle with a connecting towing bar; starting the track towing vehicle to tow the novel track layer to run to the second track switch slowly; towing the novel track layer by the track towing vehicle to pass through the second track switch firstly; when the tail of the novel track layer arrives at the track switch annunciator and stops running, pulling the first track switch and the second track switch to open a lateral passage track of the track switches; starting the track towing vehicle, such that the track towing vehicle pushes the novel track layer to pass through the second track switch and the first track switch and to enter the main line; when the tail of the track towing vehicle arrives at an annunciator of the first track switch and stops running, disconnecting the novel track layer from the track towing vehicle; starting the track towing vehicle to open lateral passage, and returning; when the tail of the track towing vehicle arrives at a fouling point indicator position of the first track switch and stops, pulling the first track switch to recover forward passage; starting the novel track layer to run towards a working surface; when the tail of the novel track layer arrives the fouling point indicator position of the first track switch after passing through the first track switch, and stops, pulling the first track switch to open lateral passage; starting the track towing vehicle to run towards the main line; when the tail of the track towing vehicle arrives at the annunciator of the first track switch and stops, pulling the first track switch to recover forward passage; starting the track towing vehicle to pass through the first track switch and approach to the novel track layer slowly, and stopping after the track towing vehicle arrives at the fouling point indicator position of the first track switch; connecting the track towing vehicle and the novel track layer with a connecting towing bar; after correct connection, starting the track towing vehicle to push the novel track layer to a new working surface to complete the transfer work; and   (3) transfer to a new working surface in a reverse direction: withdrawing horizontal extension devices of the vertical supporting structures of the No. 1 and No. 2 lifting and walking trolleys of the novel track layer back to the running transfer position; withdrawing the vertical supporting structures back to the upper limit transfer running position, and locking; dismounting the power supply of the novel track layer, and rolling the cable into the cable reel; disconnecting the track running wheels of the novel track layer from the running drive speed reducer, such that they are at a neutral gear; connecting the novel track layer and the track towing vehicle with a connecting towing bar; starting the track towing vehicle to tow the novel track layer to run to the second track switch slowly; when the head of the novel track layer arrives at a fouling point indicator position of the second track switch and stops, disconnecting the novel track layer from the track towing vehicle; starting the track towing vehicle to continuously run forward; when the tail of the track towing vehicle arrives at an annunciator position of the second track switch and stops, pulling the second track switch to open lateral passage; starting the track towing vehicle to run reversely; when the tail of the trail towing vehicle arrives at the fouling point indicator position of the second track switch and stops, pulling the second track switch to recover forward passage; starting the novel track layer to run towards a new working surface; when the tail of the novel track layer arrives at the annunciator of the second track switch and stops, pulling the second track switch to recover lateral passage; starting the track towing vehicle to approach to the novel track layer slowly, and then stopping; connecting the track towing vehicle and the novel track layer with a connecting towing bar; after correct connection, starting the track towing vehicle to push the novel track layer to a new working surface to complete the transfer work.