A caisson construction method with weak geological conditions

Abstract

The invention relates to aweak geology open caisson construction method. The weak geological open caisson construction method specifically includes the following steps: S1, an excavation site is preliminarily leveled, then formwork erecting pouring of the first section of an open caisson is conducted, and then excavation and sinking construction of the first section of the open caisson is conducted; S2, soil on the periphery of the first section of the open caisson is excavated and the outer wall of the open caisson is covered with a layer of demolding material, and then concrete is poured onthe periphery of the first section of the open caisson to form a correction platform; S3, formwork erecting pouring of the second section of the open caisson is conducted on the first section of the open caisson, and then excavation and sinking construction is conducted; and S4, the method of open caisson construction in the step S3 is conducted repeatedly until the overall height of the open caisson reaches the design depth, a plurality of water leading holes are reserved in the lower open caisson during vertical shuttering pouring, the open caisson is subjected to bottom sealing construction, finally, load-bearing concrete is poured on the periphery of the top open caisson which is higher than the correction platform, and the open caisson capable of being applied in weak geology is obtained. According to the weak geology open caisson construction method, the open caisson can be sunk vertically, the construction accuracy is high, and whole sinking of the open caisson is not prone to happening.

Description

technical field [0001] The invention relates to the field of caisson construction, in particular to a caisson construction method with weak geological conditions. Background technique [0002] In recent years, due to the lack of groundwater, the construction of caissons has become the main storage structure for accumulating surface water and groundwater to solve the problems of agricultural irrigation, industrial production and people's domestic water use. The sinking of caissons is a special construction method suitable for unstable aquifers. However, in the process of constructing caissons, according to engineering geological conditions and engineering characteristics, quality problems will occur if the sinking is not performed properly. For high-depth, pure quicksand geological caissons, it is easy to cause caisson inclination or caisson offset. The main reasons for caisson inclination or caisson offset are as follows: the caisson inclination is mainly due to the uneven h...

AI Technical Summary

Problems solved by technology

However, after this caisson construction method is completed, the caisson is mainly supported by the support of the soil to the bottom of the well and the friction of the soil to the outer wall of the caisson. For weak geology such as swamps or quicksand, caissons after construction often occur The overall sinking phenomenon greatly reduces the service life of the caisson

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