Calculation method for stability control of gravel pile and geogrid combined composite foundation

Abstract

The invention discloses a calculation method for stability control of a gravel pile and geogrid combined composite foundation. When the gravel pile and geogrid combined composite foundation conforms to an assumed deep failure mode, the calculation of the stability control of the gravel pile and geogrid combined composite foundation is based on a rigid body limit balance principle; for reinforced soil bodies between gravel piles, a reinforced soil body under an embankment coverage area is equivalent to homogeneous soil according to an area equivalent method, the area except the embankment coverage area is still a soft soil area, and the safety coefficient of the gravel pile and geogrid combined composite foundation is calculated; if the safety coefficient meets the requirements in technicalspecifications, the minimum geogrid ultimate tensile rigidity required by the safety factor is calculated, and the determined design scheme of the gravel pile and geogrid combined composite foundation is more economical and effective. The problem of stability calculation of a traditional gravel pile and geogrid combined composite foundation is solved, and meanwhile the strength parameters of gravel piles and geogrids are reasonably determined.

Description

technical field [0001] The invention relates to a design method for stability control of civil foundation, in particular to a design method for stability control of gravel pile combined with geogrid composite foundation. Background technique [0002] At present, with the rapid development of road and railway construction in our country, higher requirements are put forward for the construction speed of embankment and settlement control. Soft soil is widely distributed in the coastal areas of my country. Its natural water content is large, its compressibility is high, its bearing capacity is low and its shear strength is very low, which poses great challenges to engineering construction. In the southeast coastal area of ​​my country, the upper soil is mostly saturated soft clay, which has low shear strength and poor drainage capacity, so the embankment is prone to instability and failure. In order to meet the requirements of bearing capacity, stability and settlement control ...

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Problems solved by technology

[0003] Aiming at the defects existing in the prior art, the present invention provides a calculation method for the stability control of gravel pile combined with geogrid composite foundation under embankment load based on the principle of rigid body limit balance, which solves the problem of the stability of traditional gravel pile combined with geogrid composite foundation. Calculation problems, and at the same time reasonably determine the strength parameters of gravel piles and geogrids

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