Construction method of cylindrical self-sinking underground space structure

Abstract

The invention discloses a construction method of a cylindrical self-sinking underground space structure. The construction method comprises the following steps that a, shallow foundation treatment is conducted; b, a prefabricated first cylinder body is longitudinally arranged in place; and c, soil bodies are dug and conveyed outwards from the interior of the first cylinder body along the inner sidewall of the first cylinder body, so that through cooperation of a soil breaking structure and the gravity of the first cylinder body, soil breaking and sinking of the first cylinder body are realized; and a first longitudinal water pipe is provided with a first water outlet located in the bevel edge of the soil breaking structure and a first water inlet located in the upper end face of the firstcylinder body, and the water outlet direction of the first water outlet is vertically downward or downward along the bevel edge. In the execution process of step c, the construction method further comprises the following steps that d, the sinking speed of the first cylinder body is detected, and if the current sinking speed of the first cylinder body is lower than the preset sinking speed, high-pressure water injection is conducted in the first cylinder body, so that high-pressure water flow scours the soil body located at the lower end of the first cylinder body into the first cylinder body,and then the first cylinder body is promoted to sink.

Description

technical field [0001] The invention relates to a construction method of an underground space structure, in particular to a construction method of a cylindrical self-sinking 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 wal...

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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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