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A platform for research: civil engineering, architecture and urbanism
Bridge pier group pile foundation stability evaluation method
The invention provides a bridge pier group pile foundation stability evaluation method, which comprises the following steps of: finding out spatial structure characteristics and development laws of three unfavorable geological conditions of bridge site fault, karst cave and hardness difference, and determining the load bearing condition of a bridge pier group pile foundation; basic physical and mechanical tests of rock soil around the pile are carried out, the material structure composition and basic mechanical properties of the rock soil are revealed, and the optimal similar material ratio is selected through orthogonal test comparison; carrying out a pier group pile foundation-foundation physical model test to obtain group pile response information so as to establish a relation model among deformation, bearing capacity and main influence factors under the action of the induction factors; based on the mutual feedback law of all factors, a pile group foundation-foundation deformation and failure mechanism is obtained by combining the change of the microstructure; and a failure criterion is established by combining a deformation failure mechanism, analytic mechanics, numerical simulation and field data. According to the method, the stability of the pier group pile foundation of the foundation which crosses three unfavorable geological conditions of fault, karst cave and hardness difference can be effectively evaluated.
本发明提供了一种桥墩群桩基础稳定性评价方法，包括：查明桥址断层、溶洞、软硬差异三种不良地质条件空间结构特征和发育规律，确定桥墩群桩基础承受荷载情况；开展桩周岩土基本物理力学试验，揭示其物质结构组成、基本力学性质，通过正交试验比选出最优相似材料配比；开展桥墩群桩基础‑地基物理模型试验，获得群桩响应信息以建立诱发因素作用下变形、承载力与主要影响因素间的关系模型；基于各因素互馈规律，结合细观结构变化得到群桩基础‑地基变形破坏机制；将变形破坏机制、解析力学、数值模拟、现场数据相结合建立失效判据。本发明能够对跨越断层、溶洞、软硬差异三种不良地质条件并存地基的桥墩群桩基础稳定性进行有效评价。
Bridge pier group pile foundation stability evaluation method
The invention provides a bridge pier group pile foundation stability evaluation method, which comprises the following steps of: finding out spatial structure characteristics and development laws of three unfavorable geological conditions of bridge site fault, karst cave and hardness difference, and determining the load bearing condition of a bridge pier group pile foundation; basic physical and mechanical tests of rock soil around the pile are carried out, the material structure composition and basic mechanical properties of the rock soil are revealed, and the optimal similar material ratio is selected through orthogonal test comparison; carrying out a pier group pile foundation-foundation physical model test to obtain group pile response information so as to establish a relation model among deformation, bearing capacity and main influence factors under the action of the induction factors; based on the mutual feedback law of all factors, a pile group foundation-foundation deformation and failure mechanism is obtained by combining the change of the microstructure; and a failure criterion is established by combining a deformation failure mechanism, analytic mechanics, numerical simulation and field data. According to the method, the stability of the pier group pile foundation of the foundation which crosses three unfavorable geological conditions of fault, karst cave and hardness difference can be effectively evaluated.
本发明提供了一种桥墩群桩基础稳定性评价方法，包括：查明桥址断层、溶洞、软硬差异三种不良地质条件空间结构特征和发育规律，确定桥墩群桩基础承受荷载情况；开展桩周岩土基本物理力学试验，揭示其物质结构组成、基本力学性质，通过正交试验比选出最优相似材料配比；开展桥墩群桩基础‑地基物理模型试验，获得群桩响应信息以建立诱发因素作用下变形、承载力与主要影响因素间的关系模型；基于各因素互馈规律，结合细观结构变化得到群桩基础‑地基变形破坏机制；将变形破坏机制、解析力学、数值模拟、现场数据相结合建立失效判据。本发明能够对跨越断层、溶洞、软硬差异三种不良地质条件并存地基的桥墩群桩基础稳定性进行有效评价。
Bridge pier group pile foundation stability evaluation method
一种桥墩群桩基础稳定性评价方法
LIU ZHAOXUAN (author) / HUANG LEI (author) / LI YUNAN (author) / LI SHUANGHUI (author) / TIAN SHUNYAO (author) / ZHANG HUAN (author) / ZHANG XINPING (author)
2023-10-27
Patent
Electronic Resource
Chinese
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