Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method of bridge pile foundation in karst area
A construction method of a bridge pile foundation in a karst area is mainly suitable for a karst pile foundation construction process of stable soil layers such as soft lying layers connected with medium and micro weathered bedrock, middle clay-free layers and strong weathered layers. According to the principle that a colloid of cement is similar to a water pipe rubber ring gasket, effective sealing, embedding and fixing are achieved among a steel casing, a rock stratum, a retaining wall and the like, a soft lying layer on the periphery of the retaining wall is completely sealed outside the steel casing, a conventional punching, throwing and filling process can be adopted subsequently, and even if karst cave slurry leakage occurs, the sealing effect is good. And the stability of the soil layer and the soil body is not influenced. In addition, only the steel casing needs to be arranged in the range of the soft lying layer, so that the use of multiple layers of inner steel casings is reduced, the cost is greatly reduced, the soft lying layer reinforcing process is simple, only the soft lying soil layer above the top plate of the karst cave is reinforced, no construction risk exists during reinforcing, a conventional throwing and filling process is adopted after the karst cave is encountered, the operation process is simple, and pile foundation hole forming can be accelerated.
一种岩溶地区桥梁桩基的施工方法，主要适用软卧层接中微风化基岩、中间无粘土、强风化层等稳定土层的岩溶桩基施工工艺。本发明通过水泥的胶状体产生类似于水管胶圈垫片的原理，从而对钢护筒、岩层、护壁等之间的有效密封嵌入固定，使护壁外围的软卧层被完全封闭于钢护筒的外部，从而在后续可以采用常规冲孔抛填工艺，即便遇到溶洞漏浆，土层土体的稳定性也不会受到影响。而且本发明只需在软卧层范围设置钢护筒，从而减少多层内钢护筒的使用，大大降低成本，本发明的软卧层加固工艺简单，只针对溶洞顶板以上软卧土层加固，加固时无施工风险，遇到溶洞后，为常规抛填工艺，操作工艺简单，可加快桩基成孔。
Construction method of bridge pile foundation in karst area
A construction method of a bridge pile foundation in a karst area is mainly suitable for a karst pile foundation construction process of stable soil layers such as soft lying layers connected with medium and micro weathered bedrock, middle clay-free layers and strong weathered layers. According to the principle that a colloid of cement is similar to a water pipe rubber ring gasket, effective sealing, embedding and fixing are achieved among a steel casing, a rock stratum, a retaining wall and the like, a soft lying layer on the periphery of the retaining wall is completely sealed outside the steel casing, a conventional punching, throwing and filling process can be adopted subsequently, and even if karst cave slurry leakage occurs, the sealing effect is good. And the stability of the soil layer and the soil body is not influenced. In addition, only the steel casing needs to be arranged in the range of the soft lying layer, so that the use of multiple layers of inner steel casings is reduced, the cost is greatly reduced, the soft lying layer reinforcing process is simple, only the soft lying soil layer above the top plate of the karst cave is reinforced, no construction risk exists during reinforcing, a conventional throwing and filling process is adopted after the karst cave is encountered, the operation process is simple, and pile foundation hole forming can be accelerated.
一种岩溶地区桥梁桩基的施工方法，主要适用软卧层接中微风化基岩、中间无粘土、强风化层等稳定土层的岩溶桩基施工工艺。本发明通过水泥的胶状体产生类似于水管胶圈垫片的原理，从而对钢护筒、岩层、护壁等之间的有效密封嵌入固定，使护壁外围的软卧层被完全封闭于钢护筒的外部，从而在后续可以采用常规冲孔抛填工艺，即便遇到溶洞漏浆，土层土体的稳定性也不会受到影响。而且本发明只需在软卧层范围设置钢护筒，从而减少多层内钢护筒的使用，大大降低成本，本发明的软卧层加固工艺简单，只针对溶洞顶板以上软卧土层加固，加固时无施工风险，遇到溶洞后，为常规抛填工艺，操作工艺简单，可加快桩基成孔。
Construction method of bridge pile foundation in karst area
一种岩溶地区桥梁桩基的施工方法
WANG HELING (Autor:in) / LIU XIAOGANG (Autor:in)
10.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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