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A platform for research: civil engineering, architecture and urbanism
Rapid construction method for expansion shell type pre-stressed anchor rod
The invention discloses a rapid construction method for an expansion shell type pre-stressed anchor rod, and relates to the technical field of slope reinforcement construction. The rapid construction method comprises the following steps that lofting of anchor rod hole sites is carried out, and lofting is carried out according to an anchor rod arrangement diagram; an operation scaffold is erected; drilling is carried out, and a drill bit with the diameter at least 50 mm larger than that of the anchor rod is used for drilling in the calibrated anchor hole position; hole washing acceptance inspection is carried out, and slag removal and hole washing are carried out on the holes through high-pressure air; the pre-stressed anchor rod is mounted, the whole rod body of the assembled anchor rod is inserted into the bottom of the formed hole, and the rod body is forcibly pre-tightened to eject the expansion shell type anchor head; prestress is applied, and tensioning is carried out in a staged loading mode; and the anchor rod is grouted. The rapid construction method is suitable for the side slope and surrounding rock supporting process where deformation and sliding of a rock stratum or a soil body shallow layer need to be rapidly limited after excavation, the scheme of a side slope supporting system is jointly formed through the pre-stressed anchor rods and hanging net sprayed concrete, initial deformation and traction sliding of the side slope after slope cutting are avoided, time is shortened, and cost is saved.
本发明公开了一种涨壳式预应力锚杆快速施工工法，涉及边坡加固施工技术领域。该方法包括步骤：锚杆孔位放样，根据锚杆布置图进行放样；搭设操作脚手架；钻孔，使用直径比锚杆直径大至少50mm的钻头在标定的锚孔位置进行钻孔；洗孔验收，采用高压风对该孔进行清渣、洗孔；预应力锚杆安装，将组装好的锚杆的整根杆体插入成孔底部，用力预紧杆体顶开涨壳式锚头；施加预应力，采用分级加载的方式进行张拉；锚杆注浆。本发明的施工工法适用于开挖后需迅速限制岩层或土体浅层变形滑动的边坡和围岩支护过程，通过预应力锚杆加挂网喷射混凝土共同组成边坡的支护体系方案，避免了边坡在削坡后的初期变形和牵引滑动，节约了时间，节约了成本。
Rapid construction method for expansion shell type pre-stressed anchor rod
The invention discloses a rapid construction method for an expansion shell type pre-stressed anchor rod, and relates to the technical field of slope reinforcement construction. The rapid construction method comprises the following steps that lofting of anchor rod hole sites is carried out, and lofting is carried out according to an anchor rod arrangement diagram; an operation scaffold is erected; drilling is carried out, and a drill bit with the diameter at least 50 mm larger than that of the anchor rod is used for drilling in the calibrated anchor hole position; hole washing acceptance inspection is carried out, and slag removal and hole washing are carried out on the holes through high-pressure air; the pre-stressed anchor rod is mounted, the whole rod body of the assembled anchor rod is inserted into the bottom of the formed hole, and the rod body is forcibly pre-tightened to eject the expansion shell type anchor head; prestress is applied, and tensioning is carried out in a staged loading mode; and the anchor rod is grouted. The rapid construction method is suitable for the side slope and surrounding rock supporting process where deformation and sliding of a rock stratum or a soil body shallow layer need to be rapidly limited after excavation, the scheme of a side slope supporting system is jointly formed through the pre-stressed anchor rods and hanging net sprayed concrete, initial deformation and traction sliding of the side slope after slope cutting are avoided, time is shortened, and cost is saved.
本发明公开了一种涨壳式预应力锚杆快速施工工法，涉及边坡加固施工技术领域。该方法包括步骤：锚杆孔位放样，根据锚杆布置图进行放样；搭设操作脚手架；钻孔，使用直径比锚杆直径大至少50mm的钻头在标定的锚孔位置进行钻孔；洗孔验收，采用高压风对该孔进行清渣、洗孔；预应力锚杆安装，将组装好的锚杆的整根杆体插入成孔底部，用力预紧杆体顶开涨壳式锚头；施加预应力，采用分级加载的方式进行张拉；锚杆注浆。本发明的施工工法适用于开挖后需迅速限制岩层或土体浅层变形滑动的边坡和围岩支护过程，通过预应力锚杆加挂网喷射混凝土共同组成边坡的支护体系方案，避免了边坡在削坡后的初期变形和牵引滑动，节约了时间，节约了成本。
Rapid construction method for expansion shell type pre-stressed anchor rod
一种涨壳式预应力锚杆快速施工工法
CHENG XIAODONG (author) / QI ENHUI (author) / ZHOU JI (author) / YANG HAO (author)
2021-04-27
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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