Method for constructing soft soil foundation continuous caisson

Abstract

The invention discloses a method for constructing a soft soil foundation continuous caisson, which is used for forming a continuous caisson formed by communicating a plurality of single caissons in a soft soil foundation. The method at least comprises the following steps of: (1) constructing a working chamber; (2) constructing a caisson body and excavating soil for sinking; leading caisson body joints to form a steel seal door on adjacent ends by a steel member and setting a pre-embedded member; (3) jointing the caissons; and (4) disassembling the steel seal door to enable the single caissons to be communicated mutually to form the continuous caisson. In the constructing method, the seal door of the adjacent ends of the single caissons is formed by adopting the steel member; and compared with the current adopted concrete seal door, the invention is convenient for assembly and disassembly and can shorten the construction period. The steel member for forming the steel seal door can be recycled, the building material cost is reduced, the damage to the peripheral caisson structure when the concrete seal door is chiseled can be prevented, and the waste disposal link after chiseling is omitted.

Description

technical field [0001] The invention relates to an underground space construction method, in particular to a continuous caisson construction method suitable for the construction of large underground spaces such as subway stations. Background technique [0002] At present, the construction methods for building large underground spaces such as urban subway stations mainly include open-cut method, shallow-buried underground method and cover-excavation method. These construction methods all need to implement enclosure structures such as underground diaphragm walls and bored piles. With the continuous increase of urban development and the comprehensive development and utilization of underground space, the development of underground space is mainly developed to a large depth, which poses a challenge to the safety of the current enclosure structures such as diaphragm walls and bored piles. For example, with the substantial increase in the construction scale and buried depth of sub...

AI Technical Summary

Problems solved by technology

[0013] However, the above-mentioned construction methods all have the following technical problems: the caisson box body adopts concrete to seal the door, so that the chiseling of the concrete sealing door has a large amount of work and a long construction period, and it is easy to damage the surrounding caisson walls during chiseling, and the material loss is also large

In addition, when the air pressure caisson method is used, the excavation of the soil at the joint of the caisson leads to a longer overall construction period.

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