Method for ground probing

Abstract

A method for ground probing includes providing a vibrator arrangement held on a carrier device, designed to penetrate the ground, and comprising a vibrator motor; inserting the vibrator arrangement into the ground, to a pre-determined depth; and determining a ground profile of the ground as the vibrator arrangement is inserted. The determination of the ground profile comprises the measurement of at least one operating parameter of the vibrator arrangement during the insertion into the ground, and the ground profile comprises a respective ground parameter for at least two different ground depths.

1 . A method, comprising:
 providing a vibrator arrangement which is held on a carrying device which is designed to penetrate ground and which has a vibrator motor;   inserting the vibrator arrangement into the ground to a predetermined depth; and   determining a ground profile of the ground when the vibrator arrangement is inserted, wherein the determination of the ground profile comprises measuring at least one operating parameter of the vibrator arrangement when the vibrator arrangement is inserted into the ground, and wherein the ground profile in each case comprises a ground parameter for at least two different ground depths.   
     
     
         2 . The method as claimed in  claim 1 , further comprising:
 producing a material column in the ground depending on the ground profile, using the vibrator arrangement.   
     
     
         3 . The method as claimed in  claim 1 , further comprising:
 inserting the vibrator arrangement, driven by the carrying device at at least an approximately constant speed, into the ground; and   measuring a power consumption of the vibrator motor as an operating parameter when the vibrator arrangement is inserted into the ground.   
     
     
         4 . The method as claimed in  claim 1 , further comprising:
 exerting an at least approximately constant force on the vibrator arrangement by the carrying device when the vibrator arrangement is introduced into the ground; and   measuring a speed at which the vibrator arrangement is inserted into the ground, as an operating parameter.   
     
     
         5 . The method as claimed in  claim 1 , further comprising:
 inserting the vibrator arrangement, driven by the carrying device at at least an approximately constant speed, into the ground; and   measuring a vibration amplitude of a tip of the vibrator arrangement as an operating parameter when the vibrator arrangement is inserted into the ground.   
     
     
         6 . The method as claimed in  claim 1 , wherein the material column is produced depending on the ground profile in such a manner that a diameter of the material column at a certain ground depth is dependent on the ground parameter determined for said ground depth. 
     
     
         7 . The method as claimed in  claim 6 , wherein the ground parameter determined for a certain ground depth is dependent on a ground density and/or a ground rigidity, and wherein the material column is produced in such a manner that the diameter of the material column increases with decreasing ground density and/or decreasing ground rigidity. 
     
     
         8 . The method as claimed in  claim 1 , wherein the production of the material column comprises producing at least two segments, and wherein the production of each segment comprises:
 a) raising the vibrator arrangement by a predetermined upward displacement distance such that a cavity arises below the vibrator arrangement;   b) introducing a filler material into the cavity;   c) inserting the vibrator arrangement into the filler material by a predetermined downward displacement distance; and   d) repeating method steps a) to c) n times, where n≧0.   
     
     
         9 . The method as claimed in  claim 8 , wherein the upward displacement distance and the downward displacement distance in steps a) and b) are identical in each case. 
     
     
         10 . The method as claimed in  claim 8 , wherein the downward displacement distance in step b) is smaller by a displacement difference (Δh) than the upward displacement distance in the immediately preceding step a), and wherein, in each repetition, the upward displacement distance in step a) is identical to the downward displacement distance in the immediately preceding step b). 
     
     
         11 . The method as claimed in  claim 10 , wherein the displacement difference (Δh) in all of the repetitions is identical. 
     
     
         12 . The method as claimed in  claim 8 , wherein, for the production of a material column section at a predetermined ground depth, the number n of repetitions in step d) is dependent on the ground parameter determined for said ground depth. 
     
     
         13 . The method as claimed in  claim 12 , wherein the ground parameter is dependent on a ground density and/or a ground rigidity, and wherein the number n of repetitions increases with decreasing ground density and/or decreasing ground rigidity. 
     
     
         14 . The method as claimed in  claim 8 , wherein a strength of the segment is measured during production, and in which the number n of repetitions is dependent on the measured strength. 
     
     
         15 . The method as claimed in  claim 1 , wherein the vibrator arrangement comprises:
 a vibrator pipe with an upper and a lower end; and   a vibrator which is arranged on the vibrator pipe and has the vibrator motor.   
     
     
         16 . The method as claimed in  claim 15 , wherein the vibrator is designed as a depth vibrator and is fastened to a lower end of the vibrator pipe. 
     
     
         17 . The method as claimed in  claim 15 , wherein the vibrator is designed as a top vibrator and is fastened to an upper end of the vibrator pipe. 
     
     
         18 . The method as claimed in  claim 15 , wherein the pipe is designed as a silo pipe. 
     
     
         19 . The method as claimed in  claim 1 , wherein the carrying device comprises a carrying arm of earth-moving equipment. 
     
     
         20 . The method as claimed in  claim 1 , wherein the carrying device comprises a mast and a slide movable on the mast. 
     
     
         21 . A method for producing a material column in the ground, comprising:
 providing a vibrator arrangement which is held on a carrying device and is designed to penetrate the ground;   inserting the vibrator arrangement into the ground;   repeatedly moving the vibrator arrangement in the ground between reversing points, namely an upper reversing point and a lower reversing point, and introducing filler material into the ground when the vibrator arrangement is moved from the lower reversing point to the upper reversing point; and   detecting a position of the vibrator arrangement in the ground;   wherein the reversing points are predetermined by a control system, and   wherein a movement of the vibrator arrangement between the reversing points is depicted in an electronic display which indicates a predetermined direction of movement of the vibrator arrangement and the position of the vibrator arrangement between the reversing points.   
     
     
         22 . The method as claimed in  claim 21 , further comprising:
 producing at least two segments of the material column, wherein the production of a segment comprises:
 a) raising the vibrator arrangement by a predetermined upward displacement distance as far as an upper reversing point such that a cavity arises below the vibrator arrangement; 
 b) introducing a filler material into the cavity; 
 c) inserting the vibrator arrangement into the filler material by a predetermined downward displacement distance as far as a lower reversing point; and 
 d) repeating method steps a) to c) n times, where n≧0. 
   
     
     
         23 . The method as claimed in  claim 22 , wherein the upper reversing points in each repetition are identical, and in which the lower reversing points in each repetition are identical. 
     
     
         24 . The method as claimed in  claim 22 , wherein the downward displacement distance in step b) is smaller by a displacement difference (Δh) than the upward displacement distance in the immediately preceding step a), and wherein each repetition the upward displacement distance in step a) is identical to the downward displacement distance in the immediately preceding step b). 
     
     
         25 . The method as claimed in  claim 24 , wherein the displacement difference (Δh) in all of the repetitions is identical. 
     
     
         26 . The method as claimed in  claim 21 , wherein the display has a lower end which represents a lower reversing point and has an upper end which represents an upper reversing point, and wherein a bar arranged between the upper and the lower end indicates the position of the vibrator arrangement between the reversing points. 
     
     
         27 . The method as claimed in  claim 26 , wherein a direction arrow in or next to the display indicates the desired direction of movement of the vibrator arrangement.