Construction method of cylindrical self-sinking underground space structure

A construction method and technology of spatial structure, applied in underwater structures, infrastructure engineering, caisson and other directions, can solve the problems of surrounding environmental pollution, many construction procedures, and large construction noise, and achieve the reduction of procedures, contact area, and The effect of friction

CN112031009APending Publication Date: 2020-12-04JIANGXI JIYE SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-12-04

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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.
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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...

Examples

Embodiment Construction

[0034] Such as figure 1 As shown, the invention discloses a construction method of a cylindrical self-sinking underground space structure, comprising the following steps:

[0035] a. Shallow foundation treatment;

[0036] b. longitudinally place the prefabricated first cylinder body 1 in place;

[0037] c. Excavating soil from the inside of the first cylinder and along the inner wall of the first cylinder, so that the first cylinder achieves soil breaking and subsidence through the cooperation of the soil breaking structure and its gravity;

[0038] Among them, such as figure 2As shown, a first longitudinal water pipe 2 is installed in the first cylinder body 1, and the bottom of the first cylinder body 1 is provided with or formed with a ground-breaking structure 3; wherein, the ground-breaking structure 3 has a hypotenuse inside and The cross-section is a blade foot structure with a large top and a small bottom, wherein the ground-breaking structure 3 has a protruding st...