Construction method for manufacturing open caisson on concrete cushion

Abstract

The invention relates to a construction method for manufacturing an open caisson on a concrete cushion, which comprises the following operation steps of: (a) firstly, determining the structure sizes of a sand cushion and the concrete cushion through construction calculation; (b) determining the design position of the open caisson through construction measurement; (c) excavating a foundation pit at the design position of the open caisson to be used as a construction field of the open caisson; (d) sequentially laying the sand cushion and the concrete cushion; (e) vertically arranging a template, binding reinforcing bars and pouring the reinforced concrete open caisson on the concrete cushion; (f) removing the template; and (g) breaking the concrete cushion for sinking the open caisson. The scheme improves the safety coefficient of construction, meets the requirement of the bearing capacity for manufacturing the open caisson in any case, and has wide range of application; because the concrete cushion is adopted, the cushion extracting process is not needed, thereby simplifying the construction process and improving the construction speed; and the concrete has low price and is cheaper than a wood cushion, thereby realizing the purpose of comprehensively, safely, quickly and economically providing a construction environment for manufacturing the open caisson.

Description

technical field [0001] The invention relates to a technique for constructing buildings, structure foundations and pipe-jacking wells on the ground using a caisson method, in particular to a construction method for making a caisson on a concrete pad. Background technique [0002] Caisson construction is one of the important construction methods used in the construction of underground works and deep-buried foundation works. In water supply and drainage projects, it is often used in water intake structures, drainage pumping stations, large water collection wells, shield tunneling and pipe jacking wells and other projects. The outer wall of the caisson is used as the wall of the deep-buried structure to retain soil and water, which saves the support of the foundation pit wall required for the construction of the deep-buried structure with other plans, thus saving engineering costs; The ground is much smaller than the foundation pit of open excavation, and the amount of excavati...

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Problems solved by technology

[0006] It can be seen from the above two prior arts: the scope of application of making caissons on earth molds is very small, and can only be used for the making of small-scale caissons with better soil quality; making caissons on skids, bedding and pumping are all troublesome , the operation level is very high, and problems such as the inclination of the caisson are likely to occur during construction, which affects the construction quality of the caisson

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