Construction method of sand replacement mixing pile impervious wall

Abstract

The invention discloses a construction method of a sand replacement mixing pile impervious wall. The method comprises the following main steps of: 1. engineering research; 2. engineering analogy analysis; 3. construction scheme study, check calculation and determination; 4. construction preparation; 5. sand pile or sand wall construction; 6. mixing pile construction; 7. rebar insertion; 8. pile head excavation and breaking; 9. core detection; and 10. impounding test. Compared with the prior art, the method has the following beneficial effects that: the sand piles are adopted to replace the silt soil in the range of the impervious wall and then the wall is formed by the mixing piles, thus improving the strength of the pile bodies, increasing the adhesive forces of the inserted rebars in the mixing pile bodies, effectively connecting the impervious wall with the sluice floor slab and avoiding leakage passages formed because the foundation soil sinks and pulls down the impervious wall to break away from the floor; the problem of imperviousness treatment of the sluices and the locks after the pile foundation is adopted is better solved; and the technical construction cost is lower.

Description

technical field [0001] The invention relates to the construction field of water conservancy projects, in particular to the construction of water locks and ship locks, in particular to a construction method for building water locks and ship lock anti-seepage walls in deep silt areas. Background technique [0002] At present, in the construction of sluice and ship lock projects in coastal deep silt areas, due to the thick silt layer, the composite foundation treatment methods such as mixing piles and wooden piles are limited by construction equipment, and the pile length cannot reach the bottom of the silt layer, which is prone to large settlement. Some projects with high settlement requirements adopt the foundation treatment method of rigid pile foundation, such as bored pile, pipe pile foundation and so on. Since the pile length of bored piles and pipe pile foundations can reach the bottom of the silt layer, after treatment, the settlement of the upper structure is small, an...

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Problems solved by technology

[0017] In order to overcome the deficiencies of the existing anti-seepage walls, such as low wall strength, high difficulty in engineering construction excavation, poor anti-seepage effect and high engineering cost, the purpose of the present invention is to provide a construction method for a sand-displacing type mixing pile anti-seepage wall , this method can be applied to the anti-seepage construction of sluices and ship locks in coastal or deep silt conditions. It not only has high wall strength and low construction excavation difficulty, but also has good anti-seepage effect and relatively low project cost

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