Diaphragm wall joint flexible water stop installing device and method

[0003] There are three types of joints commonly used in China: one is the circular joint pipe process, which is used in various parts of the country and has the longest use time and mature technology. However, due to the influence of various factors, the water-stop effect is not generally recognized. Its The use process is to put the two ends or one end of the groove section before clearing the hole in the groove section, and after pouring the concrete and initial setting, use a pipe puller or a super-large crane to pull up the joint pipe; the second method is used in the Guangdong area I-steel joint technology, that is, steel plates of a certain thickness are welded into an I-shape similar to the steel cage of the continuous wall, and placed symmetrically at both ends of the first-stage slot joint, and the second-stage slot must be on the adjacent side of the two sides. Construction can only be carried out after the completion of the slotted concrete. This method has the disadvantages of concrete bypass, one joint seepage channel becomes two, high cost, waste of materials, and the water stop is still not ideal, and it is not a green construction method. Its The process is to weld steel plates into I-shaped welded I-beams, fix the secondary I-beams on both sides of the reinforcement cage of the underground diaphragm wall, and hoist them together with the reinforcement cages into the groove section with a large crane, and then pour the underwater concrete Finally, the I-beam is left on the joint of the groove section; the third is the construction process of the cross steel plate constructed in the Shanghai area, which is complicated and costly. Compared with the circular pipe joint, the concrete joint is not a semicircle but a vertical On the joint plane of the continuous wall axis, in the middle of the joint plane, vertically place a steel plate for water-stop function perpendicular to this plane. Before pouring concrete, put the water-stop steel plate and the joint box together on the joint of the groove section. The joint box is equipped with The inflatable pipe to prevent the concrete from flowing around. After the underwater...