Multi-stage light well point dewatering construction process for Yellow River flood plain bearing platform construction

Abstract

The invention discloses a multi-stage light well point dewatering construction process for Yellow River flood plain bearing platform construction. The process comprises the following steps of: (1) carrying out construction lofting and measurement; (2) constructing a bearing platform base pit by adopting a multi-stage well point dewatering method; (3) sealing the bottom: sealing the bottom of the finished bearing platform base pit by adopting concrete; and (4) carrying out bearing platform operations, wherein the construction process of the step (2) comprises the following steps of: doing construction preparations; carrying out dewatering of a well point of a first stage and base pit excavating construction; carrying out dewatering of a well point of a next stage and the base pit excavating construction; continuously repeating the construction step of the dewatering of a well point of a next stage and the base pit excavating construction according to graded dewatering grades; and finishing the dewatering construction of subsequent various stages of well points and corresponding excavating construction to obtain the molded bearing platform base pit. The process has reasonable design, convenient construction, good construction effect, safety, reliability, low manufacture cost and short construction period and can adapt to the characteristics of high underground water level and poor soil property in the Yellow River flood plain, thereby the defects of high manufacture cost, longer construction period, more difficult construction, and the like during constructing the Yellow River flood plain bearing platform by adopting a steel sheet-pile cofferdam method are effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of floodplain cap construction of the Yellow River, and in particular relates to a multi-stage light well-point dewatering construction technology for the construction of a floodplain cap of the Yellow River. Background technique [0002] With the rapid growth of my country's economy and the continuous increase of national infrastructure, the strategy of "replacing ships with bridges" will be implemented-all pontoon bridges on the Yellow River will be replaced by the Yellow River Bridge. However, in the middle and upper reaches of the Yellow River in my country, there is a flood season in the Yellow River, and the floodplain area is very large. The design scheme of the steel sheet pile cofferdam and the underwater foundation cleaning method can be applied to the construction of the bridge in the middle and upper reaches of the Yellow River. [0003] The Baotou City Stengkou Yellow River Bridge is 6355m long ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a multi-stage light well point dewatering construction process for the construction of the floodplain cap of the Yellow River in view of the above-mentioned deficiencies in the prior art, which has reasonable design, convenient construction, good construction effect, safety, reliability and low cost. The construction characteristics of high groundwater level and poor soil quality in the floodplain of the Yellow River are low, the construction period is short, and it can effectively solve the problems of high cost, long construction period, and difficult construction when using the steel sheet pile cofferdam method to construct the inner cap of the Yellow River floodplain. Defects and deficiencies such as difficulties

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