WATERPROOFING STRUCTURE AT JOINTS BETWEEN PRECAST CONCRETE SEGMENT BLOCK

摘要

The present invention discloses a joint waterproof structure of a concrete block.;According to the present invention, a pair of first recesses 12 and a pair of second recesses 14 are formed on both surfaces of the precast concrete segment block 10 facing each other, and the first recesses 12 and the first recesses are formed. 2 is provided with a closed curved expansion tube 20 is inserted along the recess 14, the expansion tube 20 can be in close contact with the space portion 26 and the first recess 12, the fluid is injected. And a first protrusion 22 formed to protrude so that it is protruded, and a second protrusion 24 protruded so as to be in close contact with the second concave portion 14. The fluid is injected into the space 26 to expand the expansion tube 20. It is characterized in that the expansion is an advantage to ensure the waterproof of the joint.