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Water-stop PC steel pipe pile and inner pre-stressed section steel support combined supporting construction method

A construction method and prestressing technology, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as foundation pit construction trouble, environmental pollution, cement slurry pollution, etc., to solve noise and mud problems, good integrity, support Simple and convenient effects

Inactive Publication Date: 2017-04-19
HANGZHOU TIANHE CONSTR GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the landslide and the water seepage of the foundation pit slope have brought great troubles to the current foundation pit construction.
At present, we traditionally use the enclosure bored piles for the enclosure support of the foundation pit, and the cement mixing piles for the anti-seepage and water leakage of the foundation pit slope, which will consume a lot of reinforced concrete, cement and a lot of water, Electricity and other materials, while producing cement slurry and other pollution problems, especially in rainy weather, the construction site will produce more mud, which will cause great pollution to the environment

Method used

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  • Water-stop PC steel pipe pile and inner pre-stressed section steel support combined supporting construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This method has been applied in the demolition and resettlement housing project for non-residents converted from rural areas. The project has two underground floors and 26-28 floors above the ground. It adopts a frame shear wall structure. The depth of the foundation pit is about 9m. The soil quality is mainly muddy clay and clay The foundation pit enclosure adopts a PC steel pipe water stop pile and a prestressed steel internal support combined support system. The steel pipe pile 1 has a specification of 630x14, the pile length is 25m, and the internal support adopts H-shaped steel with a specification of 400x400x13x21. During the excavation, there was no cracking in the soil, and the monitoring results of the foundation pit showed that the displacement and rate of change of the soil were small, which ensured the safety and reliability of the foundation pit construction. After the foundation construction is completed, the steel pipe piles and section steel are recycled ...

Embodiment 2

[0045] This method has been applied in the project of public green space and social parking garage. The project has 1 basement floor with a total construction area of ​​15832m2 2 , frame shear wall structure, the excavation depth of the foundation pit is about 8m, the foundation pit enclosure is supported by steel pipe piles and a prestressed steel internal support, the steel pipe pile 1 specification is 630x14, the pile length is 22m, and the internal support adopts the specification of 400x400x13x21 The application of this method speeds up the construction progress, ensures the safety of the foundation pit, and has outstanding benefits. Construction steps are identical with embodiment 1.

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Abstract

The invention discloses a water-stop PC steel pipe pile and inner pre-stressed section steel support combined supporting construction method. The method is characterized by comprising the following steps: 1) processing of steel pipe piles; 2) preparation before construction; 3) stacking and lifting of materials; 4) placement of a pile hammer; 5) verticality adjustment; 6) insertion and driving of the steel pipe piles and I steel for connection; 7) earth excavation and arrangement of a top beam and an inner support; 8) foundation construction and foundation pit backfilling; and 9) removal of the steel pipe piles. The method has the following beneficial effects: the method has a good water-stop effect and is simple and convenient in construction; after construction is over, the steel pipe piles and the I steel can be recycled so that the cost is saved; and meanwhile, the whole construction process is free of noise and mud, energy is saved, the environment is protected, and the problems of noise and mud produced by a traditional cast-in-place pile can be solved.

Description

technical field [0001] The invention relates to the technical field of enclosure support for foundation pits, in particular to a combined support construction method of a PC steel pipe water stop pile and a prestressed section steel inner support. Background technique [0002] With the rapid development of the current economy, urban construction is expanding to high-rise, super-high-rise and large-scale municipal construction projects, and deep foundation pit support technology has been more and more widely used in urban construction. Among them, the landslide and the water seepage of the foundation pit slope have brought great troubles to the current foundation pit construction. At present, we traditionally use the enclosure bored piles for the enclosure support of the foundation pit, and the cement mixing piles for the anti-seepage and water leakage of the foundation pit slope, which will consume a lot of reinforced concrete, cement and a lot of water, Electricity and oth...

Claims

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Application Information

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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 陆关林金立新郭永张龙顾海峰莫晓佳冯丹徐凤张立群赵登峰裘攀安
Owner HANGZHOU TIANHE CONSTR GRP
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