Construction method of high pressure mud retaining wall with underground diaphragm wall forming groove

Abstract

The invention discloses a method for constructing a high-pressure mud retaining wall for forming a groove into an underground continuous wall, comprising the following steps: forming a guide wall; installing a groove milling machine; ; until the entire groove section is grooved. The advantages of the invention are that it can control the pressure of the mud in the groove, and use the sealing device of the groove and the hydraulic pump to realize the high-pressure retaining wall of the mud during the forming of the groove, so as to limit the lateral deformation of the soil body of the groove wall, thereby reducing the construction of the underground continuous wall. The construction cost of milling into the groove is simple and efficient; the sealing reliability of both ends of the telescopic sealing sleeve is high, which further improves the reliability of the high-pressure protective wall.

Description

technical field [0001] The present application relates to the technical field of forming grooves for underground diaphragm walls, and in particular, to a construction method for high-pressure mud retaining walls for forming grooves for underground diaphragm walls. Background technique [0002] With the rapid development of underground development and underground rail transit in China, the depth of support for underground excavation projects has gradually deepened, and underground diaphragm walls have become an important form of excavation support, especially for some deep excavation and surrounding For projects with high requirements for soil deformation, underground diaphragm walls have become the preferred form of support due to their good support characteristics. However, for the underground diaphragm wall, it is necessary to carry out trough construction under the condition of mud retaining wall. The deformation and stability of the trough wall during the trough formatio...

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Problems solved by technology

Increasing the mud proportion of the retaining wall is an important means to control the deformation of the groove wall and improve its stability, but when the mud proportion increases, the mud fluidity will become poor, which will increase the power consumption of the mud circulation equipment, and at the same time, the formation particles carried by the mud will also be more It is difficult to be separated, and it will also affect the pouring of concrete; the reinforcement of the groove wall is to reinforce the groove wall with cement mixing piles before the groove is formed, so as to improve the stability of the groove wall and control the deformation of the groove wall, but the reinforcement of the groove wall Higher cost, in addition, the reinforcement depth of the groove wall reinforcement is relatively limited

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