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A platform for research: civil engineering, architecture and urbanism
Expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure and construction method
The invention provides an expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure and a construction method. The expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure comprises a grouting steel pipe, an inverted trapezoidal bearing plate and an unbonded steel strand. The inverted trapezoidal bearing plate is arranged at the front end of the grouting steel pipe, the unbonded steel strand is implanted in the steel pipe, the anchorage pier is arranged at the tail end of the grouting steel pipe, and the other end of the unbonded steel strand is anchored on the anchorage pier; grouting holes are formed in the steel pipe, a gap between the hole wall of the drill hole and the steel pipe is filled with the primary grouting body in a normal-pressure grouting mode, the steel pipe is filled with the secondary grouting body in a high-pressure grouting mode, and surrounding rock and soil bodies are split and solidified into a whole through grout outlet of the grouting holes formed in the surface of the steel pipe; the grouting steel pipe is provided with a side frictional resistance enhancing part, and the inverted trapezoidal bearing plate extrudes and expands the steel pipe under the tension of the steel strand, so that the steel pipe is expanded and deformed to form the side frictional resistance enhancing part. According to the anchor cable structure, the positive pressure in the radial direction of the drill hole is increased, the side friction resistance is improved, and the anchoring force of the pre-stressed anchor cable is further improved.
本发明提供一种膨胀挤压式钢管控制注浆预应力锚索结构及施工方法，包括：注浆钢管、倒梯形承压板和无粘结钢绞线；倒梯形承压板设置在注浆钢管前端，钢管内植入无粘结钢绞线，锚墩设置在注浆钢管尾端，无粘结钢绞线另一端锚固在锚墩上；钢管上设有注浆眼，一次注浆体常压注浆填充在钻孔孔壁与钢管间的间隙内，二次注浆体高压注浆填充在钢管内，通过布设在钢管表面的注浆眼出浆劈裂周围岩土体并凝固为一体；注浆钢管具有侧摩阻力增强部，倒梯形承压板受钢绞线拉力挤扩钢管，使得钢管产生扩张变形，形成侧摩阻力增强部。本申请的锚索结构增加了钻孔径向的正压力，提高侧摩阻力，进一步提高预应力锚索的锚固力。
Expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure and construction method
The invention provides an expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure and a construction method. The expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure comprises a grouting steel pipe, an inverted trapezoidal bearing plate and an unbonded steel strand. The inverted trapezoidal bearing plate is arranged at the front end of the grouting steel pipe, the unbonded steel strand is implanted in the steel pipe, the anchorage pier is arranged at the tail end of the grouting steel pipe, and the other end of the unbonded steel strand is anchored on the anchorage pier; grouting holes are formed in the steel pipe, a gap between the hole wall of the drill hole and the steel pipe is filled with the primary grouting body in a normal-pressure grouting mode, the steel pipe is filled with the secondary grouting body in a high-pressure grouting mode, and surrounding rock and soil bodies are split and solidified into a whole through grout outlet of the grouting holes formed in the surface of the steel pipe; the grouting steel pipe is provided with a side frictional resistance enhancing part, and the inverted trapezoidal bearing plate extrudes and expands the steel pipe under the tension of the steel strand, so that the steel pipe is expanded and deformed to form the side frictional resistance enhancing part. According to the anchor cable structure, the positive pressure in the radial direction of the drill hole is increased, the side friction resistance is improved, and the anchoring force of the pre-stressed anchor cable is further improved.
本发明提供一种膨胀挤压式钢管控制注浆预应力锚索结构及施工方法，包括：注浆钢管、倒梯形承压板和无粘结钢绞线；倒梯形承压板设置在注浆钢管前端，钢管内植入无粘结钢绞线，锚墩设置在注浆钢管尾端，无粘结钢绞线另一端锚固在锚墩上；钢管上设有注浆眼，一次注浆体常压注浆填充在钻孔孔壁与钢管间的间隙内，二次注浆体高压注浆填充在钢管内，通过布设在钢管表面的注浆眼出浆劈裂周围岩土体并凝固为一体；注浆钢管具有侧摩阻力增强部，倒梯形承压板受钢绞线拉力挤扩钢管，使得钢管产生扩张变形，形成侧摩阻力增强部。本申请的锚索结构增加了钻孔径向的正压力，提高侧摩阻力，进一步提高预应力锚索的锚固力。
Expansion extrusion type steel pipe grouting control pre-stressed anchor cable structure and construction method
一种膨胀挤压式钢管控制注浆预应力锚索结构及施工方法
YUAN KUN (author) / ZHANG YUFANG (author) / XUAN YAFEI (author) / ZHANG PENG (author) / CHEN CHANGHENG (author) / WAN JUNLI (author) / FAN JIAWEI (author)
2023-06-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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