Construction method of caisson in underground space of muddy soil

Abstract

The invention relates to a mucky soil position underground space open caisson construction method. The method comprises the steps that 1, a first open caisson section provided with a plurality of grids is manufactured; 2, hydraulic valves are installed in the grids; 3, the first open caisson section sinks under action of the self weight; 4, the opening quantity of the hydraulic valves in the firstopen caisson section is controlled so that the sinking speed of an open caisson can be controlled, and sudden sinking of the open caisson is prevented, and if the open caisson inclines, deviation rectifying is conducted through the hydraulic valves; and 5, after the first open caisson section sinks in place, all the hydraulic valves are closed, a second open caisson section is formed at the top of the first open caisson section, after the second open caisson section sinks in place, all the hydraulic valves are closed, a third open caisson section is installed at the top of the second open caisson section, then, in the same mode, manufacturing and sinking of all open caisson sections are completed, and accordingly, an open caisson is formed. Through the method, the problems that accordingto an existing open caisson construction method, when construction is conducted in mucky soil, the sinking speed of the open caisson is difficult to control, and sudden sinking is prone to occurring are solved.

Description

technical field

[0001] The invention relates to the technical field of construction, in particular to a caisson construction method in the underground space of muddy soil. Background technique

[0002] Ordinary caisson construction method, first make a caisson on the surface, and then under the enclosure of the well wall, continuously excavate soil from the well to make the caisson gradually sink under the action of its own weight, and then seal the bottom after reaching the predetermined design elevation , to build the internal structure. However, when the construction soil is relatively thick silt soil, the caisson mainly uses its own weight for subsidence construction, and appropriate control measures need to be taken to prevent problems such as sudden subsidence and offset. Construction in silt soil, adopting the undrained sinking method, the sinking speed of the caisson is difficult to control, and problems of sudden sinking and eccentricity are prone to occur. In add...

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