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A platform for research: civil engineering, architecture and urbanism
Construction method for cast-in-place pile to penetrate through goaf based on SDDC technology
The invention provides a construction method for a cast-in-place pile to penetrate through a goaf based on an SDDC technology, and belongs to the technical field of bridge construction. The construction method comprises the following steps: performing rotary digging to form a hole to a goaf part; filling the hole, wherein the thickness of a filling material exceeds the depth of the goaf; in-hole dynamic compaction is carried out through an SDDC super-strong dynamic compaction method, and a soil blank film of an inclined cone structure is formed in the goaf; secondary drilling and hole forming are carried out to reach the designed elevation of the pile bottom; according to the method, a stable supporting and filling structure is formed through the conical soil tire film, when drilling is conducted again, under the action of the soil tire film, the situation of hole collapse and caving of the goaf is greatly reduced, goaf treatment does not need to be conducted independently, cost is greatly reduced, and the construction period is greatly shortened.
本发明提出一种基于SDDC工艺的灌注桩穿越采空区施工方法，属于桥梁建筑技术领域；所述施工方法，包括进行旋挖成孔至采空区部位；在孔内进行填筑，填筑材料的厚度超出采空区深度；用SDDC超强强夯法进行孔内强夯，在采空区内形成倾斜椎体结构的土胎膜；进行二次钻进成孔至桩底设计标高；本发明利用锥形土胎膜形成一种稳定的支护填充结构，再次钻进时，在土胎膜的作用下，极大的减小了采空区塌孔冒落的情况发生，本发明不需要单独进行采空区治理，大大减少费用及工期。
Construction method for cast-in-place pile to penetrate through goaf based on SDDC technology
The invention provides a construction method for a cast-in-place pile to penetrate through a goaf based on an SDDC technology, and belongs to the technical field of bridge construction. The construction method comprises the following steps: performing rotary digging to form a hole to a goaf part; filling the hole, wherein the thickness of a filling material exceeds the depth of the goaf; in-hole dynamic compaction is carried out through an SDDC super-strong dynamic compaction method, and a soil blank film of an inclined cone structure is formed in the goaf; secondary drilling and hole forming are carried out to reach the designed elevation of the pile bottom; according to the method, a stable supporting and filling structure is formed through the conical soil tire film, when drilling is conducted again, under the action of the soil tire film, the situation of hole collapse and caving of the goaf is greatly reduced, goaf treatment does not need to be conducted independently, cost is greatly reduced, and the construction period is greatly shortened.
本发明提出一种基于SDDC工艺的灌注桩穿越采空区施工方法，属于桥梁建筑技术领域；所述施工方法，包括进行旋挖成孔至采空区部位；在孔内进行填筑，填筑材料的厚度超出采空区深度；用SDDC超强强夯法进行孔内强夯，在采空区内形成倾斜椎体结构的土胎膜；进行二次钻进成孔至桩底设计标高；本发明利用锥形土胎膜形成一种稳定的支护填充结构，再次钻进时，在土胎膜的作用下，极大的减小了采空区塌孔冒落的情况发生，本发明不需要单独进行采空区治理，大大减少费用及工期。
Construction method for cast-in-place pile to penetrate through goaf based on SDDC technology
一种基于SDDC工艺的灌注桩穿越采空区施工方法
TIAN ZHEN (author) / CHAI YANGJIE (author) / SHA KEFEI (author) / ZHENG GAIXIANG (author) / WANG CHAO (author) / CHAI XIAOJIE (author) / GAO FENG (author) / SHI YANJING (author) / LI JIA (author) / HAO JIANLI (author)
2023-10-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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