Reverse construction method for pipe-jacking bricked working well

Abstract

The invention discloses a reverse construction method for a pipe-jacking bricked working well. The method comprises the following steps of 1) determining the wall thickness of the well; 2) carrying out measuring, paying off and positioning; 3) carrying out earth excavation; 4) building a well chamber; 5) carrying out well bottom construction; 6) pouring a well chamber inner side protection wall; and 7) backfilling the well chamber, wherein in the step 3) and the step 4), earth excavation, well wall building and reinforced concrete ring beam pouring are conducted layer by layer from top to bottom, after construction of the upper layer is completed, construction of the next layer is conducted till all building work of the well chamber is completed, and steel bars of a lower-layer ring beam need to be pre-buried when the upper-layer well wall is built. When the well wall is built, the method for controlling the diameter of the well chamber comprises the steps that after the first layer ofwell chamber is excavated, part of the wall body is built firstly, then two steel pipes are crossed to form a cross shape, and the steel pipes are hung down from the center of the well chamber and fixed to the built wall body; and plumb bobs are tied to the two ends of each steel pipe, the distance between the paired plumb bobs corresponds to the inner diameter of the well chamber, and the plumbbobs and plumb bob lines are used as references for a bricklayer during bricklaying.

Description

Technical field[0001]The technical scheme belongs to the technical field of engineering construction, and specifically is a construction method of a reverse construction method for a pipe jacking brick working well.Background technique[0002]Pipe jacking construction is a non-excavation construction method, which is a construction technique for pipeline burying facilities without excavation or less excavation. Pipe jacking method construction is to overcome the friction between the pipeline and the surrounding soil with the help of jacking equipment in the working well, push the pipeline into the soil according to the designed slope, and transport the soil away. After one section of the pipe has been jacked into the soil layer, the second section of the pipe will continue to be jacked. The principle is to push the tool pipe or roadheader from the working pit through the soil layer and hoist it in the receiving pit with the help of the thrust of the main top cylinder, the pipeline roo...

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Problems solved by technology

[0004] Although the "Code for Construction and Acceptance of Water Supply and Drainage Pipelines" requires that the diameter of the pipe-jacking work well must be greater than or equal to the design diameter, it was found during the construction process that the diameter of the work well constructed using the reverse method of pipe-jacking brick work wells was 20 times larger than the design diameter % or so, the existing construction technology is not economical

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