Design method for vertical type foundation pit supporting structure

A foundation pit support and design method technology, which is applied in the direction of basic structure engineering, excavation, construction, etc., can solve the problems of support removal, difficult control of construction quality, and weak displacement control ability, so as to achieve favorable soil uplift resistance and overall Stability is beneficial, the effect of enhancing stability
CN105544558APending Publication Date: 2016-05-04SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
Publication Date
2016-05-04

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Abstract

The invention relates to the technical field of foundation pit engineering, in particular to a design method for a vertical type foundation pit supporting structure. The design method for the vertical type foundation pit supporting structure is characterized in that the supporting structure comprises a supporting pile and a supporting body. The design method specific to the double-row pile type supporting pile at least comprises the following steps that the supporting body is simplified into a supporting point of the foundation pit supporting structure according to the rigidity; the internal deformation force of the supporting pile and the supporting body under the soil pressure action is calculated; the resistance needed by the supporting body is calculated; and the included angle between the supporting body and the supporting pile and the length of the supporting body are calculated according to the resistance needed by the supporting body. The design method for the vertical type foundation pit supporting structure has the advantages that the vertical type foundation pit supporting structure has the multiple functions of reinforcement, soil blocking and water stopping, restrains deformation of a soil body, improves the stability of the wall of a foundation pit and realizes support-free or barrier-free construction in the pit; the related double-row pile soil pressure distribution theory research is disputed in the rock-soil field for a long time and no general agreement is achieved; monitoring data is the convincing measured data, the calculation mode is improved, and parameters are obtained through back calculation with the monitoring data, so that an effective way is provided to solve the problem.
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Description

technical field

[0001] The invention relates to the technical field of foundation pit engineering, in particular to a design method for a vertical foundation pit supporting structure. Background technique

[0002] At present, the support structure for soft soil foundation pits generally adopts cement-soil gravity retaining walls or bored piles + pit support, but both have their own advantages and disadvantages.

[0003] The advantages of the cement-soil gravity retaining wall are: there is no support in the general pit, which is convenient for rapid excavation, and has the dual functions of retaining soil and water stop, but the disadvantages are: weak displacement control ability, difficult to control construction quality, and general economy .

[0004] The advantages of bored piles + in-pit support are: it is applicable to a wide range of soil properties and soil layers, and has little impact on the surrounding environment, but the disadvantages are: the cost per meter fo...

Claims

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