Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Variable cross-section anchor rod foundation structure and construction method
The invention discloses a variable cross-section anchor rod foundation structure and a construction method, an anchor rod foundation comprises an upper section anchor rod and a lower section anchor rod, a steel casing is arranged in the upper section anchor rod, the upper portion of the upper section anchor rod is located in a soil layer or a fully-weathered rock stratum, the bottom of the upper section anchor rod penetrates through a soil-rock boundary line and is embedded into a strongly-weathered, moderately-weathered, slightly-weathered or unweathered rock mass, and the bottom of the upper section anchor rod is connected with the lower section anchor rod. The anchor bars are arranged along the full length of the anchor rod, a grouting material protection layer is arranged at the bottom, the sectional area of the upper-section anchor rod is larger than that of the lower-section anchor rod, and grouting materials are arranged outside the steel casing, inside the steel casing and inside the lower-section anchor hole. The upper-section anchor rod is located in an overburden layer with weak stability, but the upper-section anchor rod has a certain horizontal bearing capacity due to the larger sectional area of the upper-section anchor rod and the steel casing; the bottom of the upper-section anchor rod is embedded into rock, so that the vertical compression bearing capacity can be increased; the lower section anchor rod is located in a rock foundation with high stability and can provide enough vertical uplift bearing capacity. Under the condition that the overburden layer is not excavated on a large scale, the structural stability and the vertical and horizontal bearing capacity of the anchor rod are guaranteed, the construction period is shortened, and the engineering cost is reduced.
本发明公开一种变截面锚杆基础结构及施工方法，锚杆基础包括上段锚杆及下段锚杆，上段锚杆内部设置钢护筒，上段锚杆的上部位于土层或全风化岩层中，上段锚杆的底部穿过土岩交界线，嵌入强风化、中风化、微风化或未风化岩体中，锚筋沿锚杆通长布置，底部设置灌浆料保护层，上段锚杆截面积大于下段锚杆截面积，钢护筒外部、钢护筒内部及下段锚孔内部设有灌浆料；本发明上段锚杆处于稳定性较弱的覆土层，但上段锚杆更大的截面积及钢护筒使上段锚杆具备一定的水平承载力；上段锚杆底部嵌岩，可以增加竖向抗压承载力；下段锚杆处于稳定性较强的岩石基础中，能够提供足够的竖向抗拔承载力。本发明在不进行大规模开挖覆土层的条件下，保证了锚杆结构稳定性及竖向与水平承载能力，缩短了施工工期和降低工程成本。
Variable cross-section anchor rod foundation structure and construction method
The invention discloses a variable cross-section anchor rod foundation structure and a construction method, an anchor rod foundation comprises an upper section anchor rod and a lower section anchor rod, a steel casing is arranged in the upper section anchor rod, the upper portion of the upper section anchor rod is located in a soil layer or a fully-weathered rock stratum, the bottom of the upper section anchor rod penetrates through a soil-rock boundary line and is embedded into a strongly-weathered, moderately-weathered, slightly-weathered or unweathered rock mass, and the bottom of the upper section anchor rod is connected with the lower section anchor rod. The anchor bars are arranged along the full length of the anchor rod, a grouting material protection layer is arranged at the bottom, the sectional area of the upper-section anchor rod is larger than that of the lower-section anchor rod, and grouting materials are arranged outside the steel casing, inside the steel casing and inside the lower-section anchor hole. The upper-section anchor rod is located in an overburden layer with weak stability, but the upper-section anchor rod has a certain horizontal bearing capacity due to the larger sectional area of the upper-section anchor rod and the steel casing; the bottom of the upper-section anchor rod is embedded into rock, so that the vertical compression bearing capacity can be increased; the lower section anchor rod is located in a rock foundation with high stability and can provide enough vertical uplift bearing capacity. Under the condition that the overburden layer is not excavated on a large scale, the structural stability and the vertical and horizontal bearing capacity of the anchor rod are guaranteed, the construction period is shortened, and the engineering cost is reduced.
本发明公开一种变截面锚杆基础结构及施工方法，锚杆基础包括上段锚杆及下段锚杆，上段锚杆内部设置钢护筒，上段锚杆的上部位于土层或全风化岩层中，上段锚杆的底部穿过土岩交界线，嵌入强风化、中风化、微风化或未风化岩体中，锚筋沿锚杆通长布置，底部设置灌浆料保护层，上段锚杆截面积大于下段锚杆截面积，钢护筒外部、钢护筒内部及下段锚孔内部设有灌浆料；本发明上段锚杆处于稳定性较弱的覆土层，但上段锚杆更大的截面积及钢护筒使上段锚杆具备一定的水平承载力；上段锚杆底部嵌岩，可以增加竖向抗压承载力；下段锚杆处于稳定性较强的岩石基础中，能够提供足够的竖向抗拔承载力。本发明在不进行大规模开挖覆土层的条件下，保证了锚杆结构稳定性及竖向与水平承载能力，缩短了施工工期和降低工程成本。
Variable cross-section anchor rod foundation structure and construction method
一种变截面锚杆基础结构及施工方法
LIU JIQIU (Autor:in) / ZENG ERXIAN (Autor:in) / DING YANGBO (Autor:in) / WANG WEI (Autor:in) / ZHAO JIANGTAO (Autor:in) / LIU WENXUN (Autor:in) / LUO XIANGUO (Autor:in) / XU YANBING (Autor:in) / CHENG SHUYI (Autor:in) / WU YONG (Autor:in)
15.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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