Study on Bearing Mobilization Coefficient of Long-Short Piles Composite Foundation

杨明; 张可能; 杨庆光; 刘杰

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Study on Bearing Mobilization Coefficient of Long-Short Piles Composite Foundation

更新时间：2025-12-11

- Study on Bearing Mobilization Coefficient of Long-Short Piles Composite Foundation
- Vol. 29, Issue 1, Pages: 77-82(2009)
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  CLC： U473.1
- Published：2009
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[1]杨明,张可能,杨庆光,刘杰.长短桩复合地基承载力发挥系数取值研究[J].防灾减灾工程学报,2009,29(01):77-82.

杨明, 张可能, 杨庆光, et al. Study on Bearing Mobilization Coefficient of Long-Short Piles Composite Foundation[J]. 2009, 29(1): 77-82.
[1]杨明,张可能,杨庆光,刘杰.长短桩复合地基承载力发挥系数取值研究[J].防灾减灾工程学报,2009,29(01):77-82. DOI：

杨明, 张可能, 杨庆光, et al. Study on Bearing Mobilization Coefficient of Long-Short Piles Composite Foundation[J]. 2009, 29(1): 77-82. DOI：

摘要

根据水泥土长短桩复合地基试验结果

得到了考虑荷载水平的水泥土长短桩复合地基承载力计算公式。然后

考虑复合地基中桩体、桩间土和复合地基沉降量之间的相互关系

利用现场载荷试验成果

对单桩复合地基和长短桩复合地基的桩间土承载力发挥系数和合理的s/b取值范围进行了对比研究

得到了长短桩复合地基桩间土承载力发挥系数的计算方法。结果表明:长短桩复合地基桩体先于桩间土出现破坏

桩体极限荷载点对应的复合地基s/b值为s/b的上限;当垫层模量Ec为100M Pa时

长短桩复合地基s/b上限为0.0034

对应的桩间土承载力发挥系数为0.29。

Abstract

Based on the results of static load test in-suit

a formulas for characteristic value of bearing capacity in cement-soil long-short piles composite foundation has been deduced in this paper.According to the dispalcement relationship of piles

soil and foundation

then

a method has been achieved after studing bearing mobilization coefficient of surgrade and suitable s/b for characteristic value of bearing capacity of single-pile composite foundation and long-short piles composite foundation.It has been revealed that pile will be destoried firstly before soil in long-short composite foundation is destoried.The s/b where pile is destoried is the upper limit for characteristic value of bearing capacity of composite foundation.The upper limit of s/b is 0.003 4 and the bearing mobilization coefficient of soil is 0.29 in composite foundtion when Ec is 100 MPa.

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references

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