Deep foundation pit retaining wall structure and construction method of underground space structure

Abstract

The invention provides a deep foundation pit retaining wall structure. The deep foundation pit retaining wall structure comprises a barrel-shaped retaining wall body, a water pipe through from top tobottom is arranged in the barrel-shaped retaining wall body in a poured mode, and the water pipe is provided with a water outlet which is located in the lower end face of the barrel-shaped retaining wall body and a water inlet which is located in the upper end face of the barrel-shaped retaining wall body. By means of the design, on one hand, water can be injected into a soil body located on the lower end face of the barrel-shaped retaining wall body through the water pipe to soften the soil body, so that the purpose of reducing the end resistance of the barrel-shaped retaining wall body is achieved, and then sinking of the barrel-shaped retaining wall body is facilitated; on the other hand, the softened soil body can further facilitate excavation, and the construction progress is improved; moreover, scouring can be carried out on the soil body located below the lower end face by using a method of injecting high-pressure water flow, so that the barrel-shaped retaining wall body sinks by virtue of gravity; and in this way, the purposes of reducing construction procedures, reducing construction noise, shortening the construction period and then reducing pollution to the surrounding environment can be finally achieved. The invention further discloses a construction method of an underground space.

Description

technical field [0001] The invention relates to a construction method of a deep foundation pit retaining wall structure and an underground space structure. Background technique [0002] The construction of underground buildings is too difficult and expensive, especially when it involves soft soil foundation, the proportion of "foundation pit support" is too large, and the "support cost" is often higher than the cost of the main building. In addition, the construction of underground engineering is complex, resulting in many process links, difficult connection, long construction period, and excessive impact on the surrounding environment, such as noise, vibration, exhaust gas, mud, etc., especially in densely populated areas. In the prior art, when supporting deep foundation pits, the form of pile driving is mainly used to form a retaining wall. For example, Chinese patent document CN108708382A discloses a continuous retaining wall for deep foundation pits, wherein the continu...

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Problems solved by technology

[0003] Although the above two retaining walls can drive the piles to the design depth according to the construction requirements, the piling construction itself will lead to more construction procedures, greater construction noise, longer construction period, and greater pollution to the surrounding environment, etc. shortcoming

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