Caisson structures for underground soil blocking and manufacturing method of anti-noise non-vibration caisson structures using thereof

Abstract

As described above, the caisson structure according to the present invention is robotized to be moved up and down by itself, and thus there is no need of using large-size constructive machines such as cranes that are used in the existing construction methods, and has an effect of improving capability of structures for underground soil blocking against a lateral force since connections and engagement among inter-lateral-side iron rods or reinforced iron members are continuously integrated all over the four surfaces, which has been weak in a bored piling construction method and a continuous wall construction method such as an SCW (Soil Cement Wall) construction method or CIP (Cast-In Placed Pile) construction method, and this significantly reduces usage of internal reinforcement materials for supporting beams, thus saving costs of construction. Also, the strength and stability of a structure against the lateral force of the inter-lateral-sides, thus leading to a significant lowering in safety accidents such as collapse or upset of temporary structures for soil blocking.

1 . A caisson structure for underground soil blocking comprising:
 a stereoscopic upper caisson body  10  separately manufactured on the ground for underground soil blocking;   plural hydraulic cylinders  20  provided at the lower part of the upper caisson body  10 ;   a lower propulsion caisson  30  to the upper side of which the cylinder road of the hydraulic cylinder  20  is combined to move up and down by a drive of the hydraulic cylinder  20 ;   a tensioner  40  attached on the upper side of the upper caisson body  10  to tension an earth anchor  60  deposited in an underground rock layer with the maximum tension by a steel wire  70 ; and   a controller  50  installed at the upper caisson body  10  to control the hydraulic cylinder  20  and the tensioner  40 , wherein while the lower propulsion caisson  30  compresses the ground by the hydraulic cylinder  20 , the ground is sunken and simultaneously the tensioner  40  draws the steel wire  70 , so that the upper caisson body  10  and the lower propulsion caisson  30  are lowered up to a targeted point.   
     
     
         2 . The caisson structure for underground soil blocking of  claim 1 , wherein the upper caisson body  10  and the lower propulsion caisson  30  are manufactured by forming high-tenacity SFRC (Steel Fiber Reinforced Concrete) or high-tenacity FRC (Fiber Reinforced Concrete) after performing a dual bar arrangement of iron bars and steel wires therein. 
     
     
         3 . The caisson structure for underground soil blocking of  claim 1 , wherein a joint for coupling the upper caisson body  10  and the lower propulsion caisson  30  is provided at each of a lower part of the upper caisson body  10  and an upper part of the lower propulsion caisson  30 , wherein a member for coupling is provided at the joint. 
     
     
         4 . The caisson structure for underground soil blocking of  claim 3 , wherein the hydraulic cylinder  20  is provided at the member for coupling, and the upper caisson body  10  and the lower propulsion caisson  30  are integrated to each other via the hydraulic cylinder  20 . 
     
     
         5 . The caisson structure for underground soil blocking of  claim 1 , wherein a lower side of the lower propulsion caisson  30  is manufactured to become narrow as going from an outer surface to an inner surface. 
     
     
         6 . A noiseless, vibration-free construction method using an underground caisson structure for underground soil blocking, comprising:
 an earth anchor fixing step of vertically perforating the ground on which the caisson is located up to a rock supporting layer by using an earth anchor perforator and then inserting the earth anchor  60  to which the steel wire  70  is coupled into the perforated ground to fix the earth anchor  60  to the underground rock layer;   a caisson manufacturing step of manufacturing the upper caisson body  10  and the lower propulsion caisson  30  separately from each other and then combining the upper caisson body  10  and the lower propulsion caisson  30  to each other through the hydraulic cylinder  20  to produce a robotized caisson structure;   a structure lowering step of allowing the upper caisson body  10  and the lower propulsion caisson  30  to arrive at a targeted point, with the lower propulsion caisson  30  moving up and down by the hydraulic cylinder  20  to collapse the soil after the steel wire  70  is coupled with the tensioner  40  provided in the upper caisson body  10 ;   after the structure lowering step, an integration step of dismantling the tensioner  40  provided in the upper caisson body and the hydraulic cylinder  20  connecting the upper caisson body  10  with the lower propulsion caisson  30  after the completion of internal digging of the caisson structure and integrating the upper caisson body  10  and the lower propulsion caisson  30  by welding; and   after the integration step, a finishing step of filling the lower part of the caisson structure with concrete and then curing the concrete.   
     
     
         7 . The noiseless, vibration-free construction method of  claim 6 , further comprising:
 after the earth anchor fixing step, a hole formation step of forming plural holes that reach the construction depth of a place where the caisson structure is to be located by using an auger in order to reduce bearing force of soil and frictional resistance when the caisson structure moves downward.   
     
     
         8 . The noiseless, vibration-free construction method of  claim 6 , wherein the upper caisson body  10  and the lower propulsion caisson  30  are manufactured by forming high-tenacity SFRC (Steel Fiber Reinforced Concrete) or high-tenacity FRC (Fiber Reinforced Concrete) after performing a dual bar arrangement of iron bars and steel wires therein. 
     
     
         9 . The noiseless, vibration-free construction method of  claim 6 , wherein a joint for coupling the upper caisson body  10  and the lower propulsion caisson  30  is provided at each of a lower part of the upper caisson body  10  and an upper part of the lower propulsion caisson  30 , wherein a member for coupling is provided at the joint. 
     
     
         10 . The noiseless, vibration-free construction method of  claim 9 , wherein the hydraulic cylinder  20  is provided at the member for coupling, and the upper caisson body  10  and the lower propulsion caisson  30  are integrated to each other via the hydraulic cylinder  20 .