Underground continuous wall construction method

Abstract

The invention discloses an underground continuous wall construction method. The underground continuous wall construction method comprises the following steps of construction preparation; groove forming construction; reinforcement cage making and hanging; concrete perfusion molding; joint box jacking; when the reinforcement cage is lowered, the joint box is installed firstly, and 3-5 m high backfilling soil is backfilled into the front groove of the mounting joint box, a concrete test block of natural maintenance is reserved when concrete is poured, the time and the speed of the jacking of thejoint box are controlled according to the solidification time of the concrete test block, and the specific operation method is as follows, when concrete is poured, a natural curing test block should be made, the time when the jacking joint box is formally started is equal to the time that the natural maintenance test block reaches the final setting state, and after the first jacking is started, lifting is carried out every 30 min, and the lifting range is 50-100 cm each time, and the joint box is completely pulled out until the uppermost part of concrete of the continuous wall is finished. Inthe underground continuous wall construction process, a groove can be guaranteed to be perpendicular as much as possible, and a good effect can be achieved for the installation and the jacking of thejoint box during joint connection.

Description

technical field [0001] The invention relates to foundation engineering, in particular to an underground diaphragm wall construction method. Background technique [0002] Diaphragm wall is a common foundation treatment method, which can not only play a strong supporting role, but also often have the effect of sealing water and waterproofing at intervals. It is suitable for most soils, so it is widely used in the field of construction. [0003] Generally, the construction of underground diaphragm walls needs to go through the process of forming grooves, and the grooves are often formed at intervals to ensure that the area of ​​each pouring is small and the risk is controllable, and the second round of groove formation will involve For the connection between the groove sections at both ends, the treatment of the joint is very important, which directly determines the water-stop effect and anti-seepage performance of the underground diaphragm wall. Therefore, special attention is...

AI Technical Summary

Problems solved by technology

On the one hand, the contact area with the I-beam is large, and the jacking is difficult. On the other hand, it is difficult to control whether the concrete is formed during the jacking and will not fill the joint area originally occupied by the joint box. If the jacking is too late, pouring The concrete will solidify the joint box and make it difficult to remove