A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improved post-pulling type tension-compression composite anchor rod and construction method thereof
The invention discloses an improved post-pulling type tension-compression composite anchor rod. The improved post-pulling type tension-compression composite anchor rod is provided with a pressure-bearing anchoring section, a slow pulling section and a pulled anchoring section, a pressure-bearing plate is arranged at the junction of the pressure-bearing anchoring section and the slow pulling section, an anchor rod body in the range of the pressure-bearing anchoring section is provided with an outer sleeve, and an anchor rod body in the range of the slow pulling section is provided with a thermal shrinkage PE pipe. The pressure-bearing anchoring section is arranged on an upper hard soil layer, the pulled anchoring section is arranged on a lower soft soil layer, and the slow pulling section penetrates through the hard soil layer and the soft soil layer at the same time. The invention further provides a construction method of the improved post-pulling type tension-compression composite anchor rod. The pressure-bearing anchoring section is stressed firstly due to high strength of the hard soil layer, the pulled anchoring section is stressed after transition of the slow pulling section and elastic stretching of the anchor rod body in the slow pulling section range, by arranging the slow pulling section, deformation of the bottom of the pressure-bearing anchoring section is larger than deformation of the top of the pulled anchoring section, the initial deformation difference is generated when the pulled anchoring section and the pressure-bearing anchoring section bear loads, the pressure-bearing anchoring section and the pulled anchoring section tend to reach the bearing capacity limit at the same time, and the uplift bearing capacity of the anchor rod is greatly improved.
本发明公开一种改进的后拉式拉压复合型锚杆，具有承压锚固段、缓拉段和受拉锚固段，承压锚固段和缓拉段交界处设置有承压板，承压锚固段范围的锚杆本体设置有外套管，缓拉段范围的锚杆本体设置有热缩PE管，承压锚固段设置在上部的硬土层，受拉锚固段设置在下部的软土层，缓拉段同时穿过硬土层和软土层。本发明还提出了该锚杆的施工方法，承压锚固段因硬土层强度高先受力，受拉锚固段因缓拉段的过渡及缓拉段范围锚杆本体的弹性拉伸后受力，由于缓拉段的设置，承压锚固段底部的变形大于受拉锚固段顶部的变形，实现受拉锚固段与承压锚固段承受荷载时出现起始变形差，能使得承压锚固段和受拉锚固段趋于同时达到承载力极限，大幅提高锚杆的抗拔承载力。
Improved post-pulling type tension-compression composite anchor rod and construction method thereof
The invention discloses an improved post-pulling type tension-compression composite anchor rod. The improved post-pulling type tension-compression composite anchor rod is provided with a pressure-bearing anchoring section, a slow pulling section and a pulled anchoring section, a pressure-bearing plate is arranged at the junction of the pressure-bearing anchoring section and the slow pulling section, an anchor rod body in the range of the pressure-bearing anchoring section is provided with an outer sleeve, and an anchor rod body in the range of the slow pulling section is provided with a thermal shrinkage PE pipe. The pressure-bearing anchoring section is arranged on an upper hard soil layer, the pulled anchoring section is arranged on a lower soft soil layer, and the slow pulling section penetrates through the hard soil layer and the soft soil layer at the same time. The invention further provides a construction method of the improved post-pulling type tension-compression composite anchor rod. The pressure-bearing anchoring section is stressed firstly due to high strength of the hard soil layer, the pulled anchoring section is stressed after transition of the slow pulling section and elastic stretching of the anchor rod body in the slow pulling section range, by arranging the slow pulling section, deformation of the bottom of the pressure-bearing anchoring section is larger than deformation of the top of the pulled anchoring section, the initial deformation difference is generated when the pulled anchoring section and the pressure-bearing anchoring section bear loads, the pressure-bearing anchoring section and the pulled anchoring section tend to reach the bearing capacity limit at the same time, and the uplift bearing capacity of the anchor rod is greatly improved.
本发明公开一种改进的后拉式拉压复合型锚杆，具有承压锚固段、缓拉段和受拉锚固段，承压锚固段和缓拉段交界处设置有承压板，承压锚固段范围的锚杆本体设置有外套管，缓拉段范围的锚杆本体设置有热缩PE管，承压锚固段设置在上部的硬土层，受拉锚固段设置在下部的软土层，缓拉段同时穿过硬土层和软土层。本发明还提出了该锚杆的施工方法，承压锚固段因硬土层强度高先受力，受拉锚固段因缓拉段的过渡及缓拉段范围锚杆本体的弹性拉伸后受力，由于缓拉段的设置，承压锚固段底部的变形大于受拉锚固段顶部的变形，实现受拉锚固段与承压锚固段承受荷载时出现起始变形差，能使得承压锚固段和受拉锚固段趋于同时达到承载力极限，大幅提高锚杆的抗拔承载力。
Improved post-pulling type tension-compression composite anchor rod and construction method thereof
一种改进的后拉式拉压复合型锚杆及其施工方法
ZHU HONGDONG (author) / TU BINGXIONG (author) / WANG ZHITAO (author) / XIONG XIONG (author) / CHENG QINHUI (author) / XU FANGCHAO (author) / QIAN JINXIN (author) / LI XING (author) / LI SHAOZENG (author) / CHEN JIAGENG (author)
2022-01-14
Patent
Electronic Resource
Chinese
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