A deformation control structure and construction method of a foundation pit adjacent to a shallow foundation building for an underground parking lot in soft ground
An underground parking lot and deformation control technology, which is applied in infrastructure engineering, buildings where cars are parked, buildings, etc., can solve the problems of difficult excavation of foundation pits and protection of surrounding buildings, high compressibility, etc.
Active Publication Date: 2021-04-23
POWERCHINA HUADONG ENG COPORATION LTD
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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
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[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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The invention provides a deformation control structure and construction method of a foundation pit adjacent to a shallow foundation building in an underground parking lot on soft ground. In the foundation pit, a row of passive piles is arranged parallel to the supporting structure of bored piles. Pit bottom support beams are set between the cast-in-place pile support structures; passive zone mixing pile reinforcements are set between the passive piles and the bored cast-in-place pile support structures; the height of the support beams in the foundation pit is set higher than the top of the underground parking lot roof 10-20cm, the top of the support beam is basically flush with the top of the crown beam of the bored pile support structure; multiple rows of PVC pipes for filling the static breaking agent are arranged in the beam body of the support beam near the joint joint of the support beam, and the top of the support beam There are pre-embedded suspension rings on the top of the overlapping joints with the supporting beams. The invention can control the deformation of the foundation pit of the adjacent shallow foundation building and reduce the impact on the adjacent shallow foundation building.
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...
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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