A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Free section assembly, prestressed self-drilling type hollow grouting anchor rod and construction method
The invention belongs to the technical field of geotechnical engineering anchoring support. The free section assembly comprises an outer sleeve, a front end head and a rear end head, and the outer sleeve comprises a front sleeve, at least one middle sleeve and a rear sleeve which are sequentially and coaxially arranged from front to back; an internal thread matched with the hollow anchor rod body is arranged on the inner wall of the front end head, and the front end head is fixed at the front end part of the front sleeve; the rear end head is matched and inserted with the rear sleeve; the front casing pipe and the adjacent middle casing pipe are connected through a threaded connection structure, every two adjacent middle casing pipes are connected through a threaded connection structure, and the rear casing pipe and the adjacent middle casing pipe are connected through a threaded connection structure. The invention further discloses a prestressed self-drilling type hollow grouting anchor rod and a construction method. According to the method, the free sections are lengthened one by one, and the problem that the free sections of 5 m or above cannot be arranged on the self-drilling type hollow grouting anchor rod is effectively solved; by applying prestress, deformation of surrounding rock can be effectively controlled, the quality problem of engineering is avoided, and the application range of the self-drilling type hollow grouting anchor rod is effectively expanded.
本发明属于岩土工程锚固支护技术领域。公开了一种自由段组件，包括外套管、前端头和后端头，外套管包括前后依次同轴设置的前套管、至少一根中套管和后套管；前端头的内壁上设置有与中空锚杆体匹配的内螺纹，前端头固定在所述前套管的前端部；所述后端头与后套管匹配插接；所述前套管与相邻的中套管之间、相邻两中套管之间、后套管与相邻的中套管之间均通过螺纹连接结构连接。还公开了一种预应力自钻式中空注浆锚杆及施工方法。本发明的自由段采用逐根接长的方法有效解决了自钻式中空注浆锚杆无法设置5m以上自由段的问题；通过施加预应力，可有效控制围岩变形，避免工程出现质量问题，有效拓展了自钻式中空注浆锚杆的应用范围。
Free section assembly, prestressed self-drilling type hollow grouting anchor rod and construction method
The invention belongs to the technical field of geotechnical engineering anchoring support. The free section assembly comprises an outer sleeve, a front end head and a rear end head, and the outer sleeve comprises a front sleeve, at least one middle sleeve and a rear sleeve which are sequentially and coaxially arranged from front to back; an internal thread matched with the hollow anchor rod body is arranged on the inner wall of the front end head, and the front end head is fixed at the front end part of the front sleeve; the rear end head is matched and inserted with the rear sleeve; the front casing pipe and the adjacent middle casing pipe are connected through a threaded connection structure, every two adjacent middle casing pipes are connected through a threaded connection structure, and the rear casing pipe and the adjacent middle casing pipe are connected through a threaded connection structure. The invention further discloses a prestressed self-drilling type hollow grouting anchor rod and a construction method. According to the method, the free sections are lengthened one by one, and the problem that the free sections of 5 m or above cannot be arranged on the self-drilling type hollow grouting anchor rod is effectively solved; by applying prestress, deformation of surrounding rock can be effectively controlled, the quality problem of engineering is avoided, and the application range of the self-drilling type hollow grouting anchor rod is effectively expanded.
本发明属于岩土工程锚固支护技术领域。公开了一种自由段组件，包括外套管、前端头和后端头，外套管包括前后依次同轴设置的前套管、至少一根中套管和后套管；前端头的内壁上设置有与中空锚杆体匹配的内螺纹，前端头固定在所述前套管的前端部；所述后端头与后套管匹配插接；所述前套管与相邻的中套管之间、相邻两中套管之间、后套管与相邻的中套管之间均通过螺纹连接结构连接。还公开了一种预应力自钻式中空注浆锚杆及施工方法。本发明的自由段采用逐根接长的方法有效解决了自钻式中空注浆锚杆无法设置5m以上自由段的问题；通过施加预应力，可有效控制围岩变形，避免工程出现质量问题，有效拓展了自钻式中空注浆锚杆的应用范围。
Free section assembly, prestressed self-drilling type hollow grouting anchor rod and construction method
自由段组件、预应力自钻式中空注浆锚杆及施工方法
WANG JINHAI (author) / SUN XIAOGANG (author) / XIAO ZHIGUANG (author) / XU ZHANBO (author)
2022-12-30
Patent
Electronic Resource
Chinese
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