Underground diaphragm wall A brief introduction to the construction technology

The common construction technology of the diaphragm wall as the supporting structure of the foundation pit is as follows: use special digging equipment, such as hydraulic grab, hydraulic grab combined with punching pile machine, and double-wheel slotting machine to carry out the slotting operation. Grab the soil, punching pile machine into the rock and trim the edge, or with milling machine to form a certain length, width, depth of unit groove section, groove section with mud wall protection, and then put into the prefabricated steel cage in the groove section, perfusion underwater concrete built into the wall section. In such a continuous construction, the wall segments are connected with each other through joints to form a complete underground wall.

1Advantages,

(1As the foundation pit enclosure structure, it can be applied to all kinds of complex construction environment, almost all kinds of geological conditions, but the construction difficulty is different. In some special environmental conditions, it may even be the only effective construction method available.

(2Low noise and small vibration during construction, which is conducive to construction in the city.

(3The stiffness of the wall is large, and the deformation is very small when the lateral soil and water pressure acts, and the settlement of the surrounding foundation is very small. Therefore, it is suitable for the use in the environment where the surrounding buildings are close to each other and the underground pipelines are dense.

(4) The seepage control effect is good. As long as the construction quality is ensured, the diaphragm wall itself is impervious to water. As long as the bottom of the wall extends into the low permeable layer or is not affected by infiltration, the settlement deformation of surrounding buildings (structures) and underground pipelines caused by the precipitation in the foundation pit will be very small.

(5The diaphragm wall may be designed as a permanent vertical bearing structure of the building and as an exterior wall of the basement.

(6When the basement is constructed by reverse method, diaphragm wall is the preferred form of foundation pit enclosure.

(7The diaphragm wall is the foundation pit enclosure structure that can make the best use of the interior space within the red line of the building, so it can maximize the benefits of land investment.

2And disadvantages

(1)Underground diaphragm wall Mud wall protection should be used in trough construction. Improper treatment of mud will cause environmental pollution.The contradiction is even more pronounced when it comes to urban construction.

(2If the diaphragm wall is only used as the retaining soil of the foundation pit, the seepage control structure or the bearing layer is far deeper than the depth of the foundation pit, the use of diaphragm wall may not be as economical as other envelop structures.

Shanghai Qiangqiang Foundation Engineering Co., LTD. 's business covers foundation pit engineering, pile foundation engineering, land and waterFoundation treatment, slope treatment and other engineering fields. around "Excellent technology, reliable process, fast construction" technical requirements, is to provide customers with land, water foundation engineering technical consultation, construction services and other comprehensive solutions of the entity enterprise. Contact Number:400-1002850