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Construction method of pre-stressed anchor cable for strong unloading fractured rock mass
The invention discloses a construction method of a pre-stressed anchor cable for strong unloading fractured rock mass, and belongs to the technical field of pre-stressed anchor cable construction forrock mass reinforcement. The method comprises the following steps of anchor cable hole drilling, anchor cable body manufacturing and mounting, grouting, anchorage pier construction, anchor cable bodylocking and supplementary grouting anchor sealing. An anchor cable hole is formed in pipe-following hole forming, wall-fixing hole forming and on-demand grouting modes, so that the problems that underthe geological condition of the strong unloading fractured rock mass, hole walls are prone to collapse during hole forming, hole forming air leakage occurs, and grouting leakage is serious are solved, the grouting quality is favorably guaranteed, and the prestress of the anchor cable is kept; and in the processes of wall fixing and hole forming and on-demand grouting, pre-grouting is carried outon the hole wall of the anchor cable hole, so that grout leaking during grouting of a tensioning section and a anchoring section is avoided, the grouting quality of the anchoring section is favorablyguaranteed, and the prestress of the anchor cable is kept.
本发明公开了一种强卸荷破碎岩体预应力锚索施工方法，属于岩体加固预应力锚索施工技术领域。该方法包括如下步骤：钻锚索孔、锚索体制作与安装、注浆、锚墩施工、锁定锚索体、补注浆封锚。锚索孔采用跟管成孔、固壁成孔和按需注浆的方式制得，解决了在强卸荷破碎岩体地质条件下，造孔存在孔壁容易坍塌，造孔漏风、注浆漏失情况严重的问题，有助于确保注浆质量和锚索保持预应力。在固壁成孔和按需注浆过程中，对锚索孔的孔壁进行预注浆，避免张拉段与锚固段注浆时出现串浆，有助于确保锚固段注浆质量和锚索保持预应力。
Construction method of pre-stressed anchor cable for strong unloading fractured rock mass
The invention discloses a construction method of a pre-stressed anchor cable for strong unloading fractured rock mass, and belongs to the technical field of pre-stressed anchor cable construction forrock mass reinforcement. The method comprises the following steps of anchor cable hole drilling, anchor cable body manufacturing and mounting, grouting, anchorage pier construction, anchor cable bodylocking and supplementary grouting anchor sealing. An anchor cable hole is formed in pipe-following hole forming, wall-fixing hole forming and on-demand grouting modes, so that the problems that underthe geological condition of the strong unloading fractured rock mass, hole walls are prone to collapse during hole forming, hole forming air leakage occurs, and grouting leakage is serious are solved, the grouting quality is favorably guaranteed, and the prestress of the anchor cable is kept; and in the processes of wall fixing and hole forming and on-demand grouting, pre-grouting is carried outon the hole wall of the anchor cable hole, so that grout leaking during grouting of a tensioning section and a anchoring section is avoided, the grouting quality of the anchoring section is favorablyguaranteed, and the prestress of the anchor cable is kept.
本发明公开了一种强卸荷破碎岩体预应力锚索施工方法，属于岩体加固预应力锚索施工技术领域。该方法包括如下步骤：钻锚索孔、锚索体制作与安装、注浆、锚墩施工、锁定锚索体、补注浆封锚。锚索孔采用跟管成孔、固壁成孔和按需注浆的方式制得，解决了在强卸荷破碎岩体地质条件下，造孔存在孔壁容易坍塌，造孔漏风、注浆漏失情况严重的问题，有助于确保注浆质量和锚索保持预应力。在固壁成孔和按需注浆过程中，对锚索孔的孔壁进行预注浆，避免张拉段与锚固段注浆时出现串浆，有助于确保锚固段注浆质量和锚索保持预应力。
Construction method of pre-stressed anchor cable for strong unloading fractured rock mass
一种强卸荷破碎岩体预应力锚索施工方法
ZHANG DONG (author) / ZHANG WEI (author) / WANG XUHUI (author) / LIANG ZHENG (author) / LI BO (author) / SONG SIYU (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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