Foundation pit support method

A foundation pit support and foundation pit technology, which is applied in the direction of excavation, foundation structure engineering, sheet pile walls, etc., to achieve the effect of small deformation of foundation pit, reduce safety risks, and meet construction requirements

Inactive Publication Date: 2019-10-08
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Abstract
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[0003] In view of this, the present invention provides a foundation pit support method to solve the p

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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The various specific technical features and various embodiments described in the specific implementation manners can be combined in any suitable manner if there is no contradiction. For example, different specific technical features / embodiments can be combined to form different implementations. In order to avoid unnecessary repetition, various possible combinations of specific technical features / embodiments in the present invention will not be further described.

[0022] A foundation pit support method provided by the embodiment of the present invention is mainly used for the construction su...

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Abstract

The invention is suitable for the technical field of geotechnical engineering and provides a foundation pit support method. The method comprises the following steps: carrying out the construction of rotary jet-grouted piles, to be specific, separately carrying out construction at the opposite soil-coming side and dug side of a foundation pit so as to form a plurality of rotary jet-grouted piles; and carrying out the construction of cast-in-place piles, to be specific, carrying out construction between the soil-coming side and the dug side so as to form a plurality of cast-in-place piles, wherein at least all rotary jet-grouted piles located at the soil-coming side are connected with each other into a whole in an overlap joint mode. The foundation pit support method provided by the invention adopts a cast-in-place pile and double-row rotary jet-grouted pile combination support technology and reduces the bore forming difficulty and the pile forming safety risk of the cast-in-place pilesas the following of steel guide cylinders is not needed in the construction process of the cast-in-place piles. The construction method is simple in technology, high in construction speed and small infoundation pit deformation and well meets the construction demands of deep pit foundation supports in soft soil regions close to railroads.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to a foundation pit supporting method. Background technique [0002] With the development of urbanization, there are more and more deep foundation pit projects near railways. The construction of deep foundation pits has a great impact on the safe operation of railways, especially in areas with complex geological conditions and soft soil, where there are great safety risks. For the support of deep pit foundations in soft soil areas, the relevant support methods have problems such as difficult construction, complicated process, and high cost, which cannot well meet the construction requirements of deep pit foundation support in soft soil areas near railways. Contents of the invention [0003] In view of this, the present invention provides a foundation pit support method to solve the problem of how to meet the construction requirements of deep pit foundation support...

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Application Information

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IPC IPC(8): E02D17/04E02D5/46E02D5/34
CPCE02D5/34E02D5/46E02D17/04
Inventor 涂启柱熊大生王忠华储团结黄俊杰于廷新张燕谢凡沈峥陈蒙涂仁盼
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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