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Deformation control structure for foundation pit of shallow foundation building adjacent to underground parking on soft soil and construction method

An underground parking lot and deformation control technology, applied in infrastructure engineering, buildings where cars are parked, buildings, etc., can solve the problems of high compressibility, foundation pit excavation and protection of surrounding buildings, etc., and achieve small deformation , high construction efficiency and construction quality, good protection effect

Active Publication Date: 2019-08-20
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are deep silt soft soil in the construction site, which is in the shape of saturated fluid plastic, partially soft plastic, and highly compressible, so it is difficult to excavate the foundation pit and protect the surrounding buildings

Method used

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  • Deformation control structure for foundation pit of shallow foundation building adjacent to underground parking on soft soil and construction method
  • Deformation control structure for foundation pit of shallow foundation building adjacent to underground parking on soft soil and construction method
  • Deformation control structure for foundation pit of shallow foundation building adjacent to underground parking on soft soil and construction method

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Embodiment Construction

[0038] With reference to the accompanying drawings, in the embodiment of the present invention, the deep muddy foundation, the foundation pit of the underground parking lot is 5.6m deep, the edge of the foundation pit is 6m away from the shallow foundation building, the diameter of the bored pile is 0.8m, the length is 17m, the distance is 1.1m, and the water stop The diameter of the curtain cement-soil mixing pile is 0.6m, and the spacing is 0.4m. The diameter of the passive pile is 0.8m, the length is 11.4m, and the spacing is 2.2m. 0.8, and the distance from the bottom of the support beam to the roof of the underground parking lot is 0.15m.

[0039] The structure and construction process of this embodiment are as follows:

[0040](1) Excavate drainage ditches 15 with a width of 50 cm and a depth of 40 cm, construct a water-stop curtain 2 for mixing piles, and a water-stop curtain for mixing piles with a depth of 10 m, made of overlapping piles with a diameter of 800 mm, con...

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Abstract

The invention provides a deformation control structure for a foundation pit of a shallow foundation building adjacent to an underground parking on soft soil and a construction method. One row of passive piles are arranged in the foundation pit in parallel with a cast-in-situ bored pile support structure, and a pit bottom support beam is arranged between passive pile crown beams and the cast-in-situ bored pile support structure; a passive zone mixing pile reinforcing body is arranged between the passive piles and the cast-in-situ bored pile support structure; the setting height of the support beam of the foundation pit is 10-20cm higher than the top plate position of the underground parking, and the top of the support beam is basically flush with the top of a cast-in-situ bored pile supportstructure crown beam; and multiple rows of PVC pipes used for filling a static crushing agent are arranged in the beam body of the support beam and are close to support beam lap joint nodes, and lifting rings are pre-buried in both the top of the support beam and the tops of the support beam lap joint nodes. The deformation of the foundation pit of the adjacent shallow foundation building can becontrolled, and the influence on the adjacent shallow foundation building is reduced.

Description

technical field [0001] The invention belongs to the field of excavation and support of foundation pits, in particular to a deformation control structure and construction method for foundation pits of underground parking lots adjacent to shallow foundation buildings in soft soil stratum, which is suitable for buildings with shallow foundations, old shallow foundations and very sensitive to foundation deformation Excavate the foundation pit next to the object. Background technique [0002] The impact of foundation pit excavation on the surrounding environment has become increasingly prominent. How to protect the surrounding environment from being affected during the excavation of foundation pits has become an issue that has been widely valued. In the design process of foundation pit engineering, not only the stability of the foundation pit but also the protection of the surrounding environment of the foundation pit should be taken into consideration. The greater the excavatio...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D5/34E02D5/46E04H6/08
CPCE02D5/34E02D5/46E02D17/04E04H6/08
Inventor 袁子琦姜远孙松强王志远储耀蒲亚君戴湘洪胡小坚杜贵正赵攀张雪锋
Owner POWERCHINA HUADONG ENG COPORATION LTD
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