Pile-Soil Stress Ratio and Settlement of Composite Foundation Bidirectionally Reinforced by Piles and Geosynthetics under Embankment Load
Pile-Soil Stress Ratio and Settlement of Composite Foundation Bidirectionally Reinforced by Piles and Geosynthetics under Embankment Load
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路堤荷载作用下桩土工合成材料双向加固复合地基的桩土应力比及沉降
DOI：
10.1155/2021/5575878
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发表时间：
2021-04
影响因子：
1.8
通讯作者：
Zhu Zhijie
中科院分区：
文献类型：
--
作者：
Ma Binhui;Li Zhuo;Cai Kai;Liu Meng;Zhao Minghua;Chen Bingchu;Chen Qiunan;Hu Zhiyong;Zhu Zhijie
桩与土工合成材料双向加筋复合地基的沉降计算一直是一个难题。其准确性的关键在于桩土应力比的确定。基于弹性基础板双参数理论，将复合地基的水平土工合成材料视为弹性薄板，将竖向桩及周围土体视为一系列不同刚度的弹簧。根据静力平衡条件，得到了考虑弯曲和拉拔作用的水平土工合成材料的挠度方程。利用复变量贝塞尔函数求解方程，推导出相应的水平土工合成材料挠度函数。然后，考虑桩土变形协调，推导了复合地基桩土应力比及沉降计算公式。工程实例分析结果表明，理论计算结果与实测值吻合较好，表明所提方法可行，计算精度良好。最后，进一步分析了水平土工合成材料复合模量、土工合成材料拉力、桩土刚度比对桩土应力比和沉降的影响。结果表明:桩土应力比随着水平土工合成材料复合模量、土工合成材料拉力和桩土刚度比的增大而增大,沉降随着水平土工合成材料复合模量、土工合成材料拉力和桩土刚度比的增大而减小。当水平土工合成材料的弯曲刚度较小时，土工合成材料的拉力作用对复合地基桩土应力比和沉降的影响不可忽视。
The settlement calculation of composite foundation bidirectionally reinforced by piles and geosynthetics is always a difficult problem. The key to its accuracy lies in the determination of pile-soil stress ratio. Based on the theory of double parameters of the elastic foundation plate, the horizontal geosynthetics of composite foundation are regarded as the elastic thin plate, and the vertical piles and surrounding soil are regarded as a series of springs with different stiffness. The deflection equation of horizontal geosynthetics considering its bending and pulling action is obtained according to the static equilibrium conditions. The equation is solved by using Bessel function of complex variable, and the corresponding deflection function of horizontal geosynthetics is deduced. Then, the calculation formula of pile-soil stress ratio and settlement of composite foundation is derived by considering the deformation coordination of pile and soil. The results of engineering case analysis show that the theoretical calculation results are in good agreement with the measured values, which indicates that the proposed method is feasible and the calculation accuracy is good. Finally, the influence of composite modulus of horizontal geosynthetics, tensile force of geosynthetics, and pile-soil stiffness ratio on pile-soil stress ratio and settlement is further analyzed. The results show that the pile-soil stress ratio increases with the increase of the composite modulus of the horizontal geosynthetics, the tensile force of geosynthetics, and the pile-soil stiffness ratio, and the settlement decreases with the increase of the composite modulus of the horizontal geosynthetics, the tensile force of geosynthetics, and the pile-soil stiffness ratio. When the flexural stiffness of the horizontal geosynthetics is small, the influence of the tensile action of the geosynthetics on the pile-soil stress ratio and settlement of the composite foundation cannot be ignored.
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DOI：
--
发表时间：
2009
期刊：
Engineering mechanics
影响因子：
--
作者：
Zhao Ming-hua
通讯作者：
Zhao Ming-hua
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DOI：
10.1007/s10064-020-02003-6
发表时间：
2020-10-17
影响因子：
4.2
作者：
He, Yong;Wang, Ming-ming;Ye, Wei-min
通讯作者：
Ye, Wei-min
DOI：
--
发表时间：
2006
期刊：
Chinese journal of rock mechanics and engineering
影响因子：
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Zhou Lixin
影响因子：
1.4
作者：
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通讯作者：
A. S. Burgess
考虑结构特性的改进软粘土非线性沉降计算方法
影响因子：
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作者：
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