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Anti-floating anchor rotary jet grouting construction method for soft stratum
The invention belongs to the technical field of anti-floating anchor rods, discloses a rotary spraying construction method for an anti-floating anchor rod in a soft stratum, and aims to solve the problems that the anti-floating anchor rod is prone to necking down in the soft stratum, and the durability is difficult to guarantee. The method comprises the following steps: (1) surveying and setting out, and determining the position of an anti-floating anchor rod; (2) carrying out first-time hole forming by using a drilling machine, wherein the hole bottom of the first-time hole forming is positioned on a bedrock layer of the rock-soil body; (3) chambering is conducted on the soft stratum of the rock-soil body through a high-pressure jet grouting machine, an expanded head section is formed, and therefore a consolidation body is formed on the soft stratum; (4) when the to-be-solidified body is initially solidified, the drilling machine is used for secondary hole forming to form an anchor hole; (5) an anchor rod and a PE pipe are placed in the anchor hole, and grouting is conducted to form an anchoring body; and (6) sealing the anchor. The conditions of necking and hole collapse can be effectively avoided, and the durability of the anti-floating anchor rod can be improved.
本发明属于抗浮锚杆技术领域，公开了一种软弱地层抗浮锚杆旋喷施工方法，为了解决抗浮锚杆在软弱地层容易出现缩颈、耐久性难以保障的问题。本发明包括：（1）测量放线，确定抗浮锚杆的位置；（2）利用钻机进行第一次成孔，第一次成孔的孔底位于岩土体的基岩层；（3）利用高压旋喷机在岩土体的软弱地层进行扩孔并形成扩大头段，从而在软弱地层形成固结体；（4）待固结体初凝的时候利用钻机进行第二次成孔形成锚孔；（5）向锚孔内放入锚杆和PE管并进行注浆形成锚固体；（6）封锚。本发明能够有效避免出现缩颈、塌孔的情况，并能够提高抗浮锚杆的耐久性。
Anti-floating anchor rotary jet grouting construction method for soft stratum
The invention belongs to the technical field of anti-floating anchor rods, discloses a rotary spraying construction method for an anti-floating anchor rod in a soft stratum, and aims to solve the problems that the anti-floating anchor rod is prone to necking down in the soft stratum, and the durability is difficult to guarantee. The method comprises the following steps: (1) surveying and setting out, and determining the position of an anti-floating anchor rod; (2) carrying out first-time hole forming by using a drilling machine, wherein the hole bottom of the first-time hole forming is positioned on a bedrock layer of the rock-soil body; (3) chambering is conducted on the soft stratum of the rock-soil body through a high-pressure jet grouting machine, an expanded head section is formed, and therefore a consolidation body is formed on the soft stratum; (4) when the to-be-solidified body is initially solidified, the drilling machine is used for secondary hole forming to form an anchor hole; (5) an anchor rod and a PE pipe are placed in the anchor hole, and grouting is conducted to form an anchoring body; and (6) sealing the anchor. The conditions of necking and hole collapse can be effectively avoided, and the durability of the anti-floating anchor rod can be improved.
本发明属于抗浮锚杆技术领域，公开了一种软弱地层抗浮锚杆旋喷施工方法，为了解决抗浮锚杆在软弱地层容易出现缩颈、耐久性难以保障的问题。本发明包括：（1）测量放线，确定抗浮锚杆的位置；（2）利用钻机进行第一次成孔，第一次成孔的孔底位于岩土体的基岩层；（3）利用高压旋喷机在岩土体的软弱地层进行扩孔并形成扩大头段，从而在软弱地层形成固结体；（4）待固结体初凝的时候利用钻机进行第二次成孔形成锚孔；（5）向锚孔内放入锚杆和PE管并进行注浆形成锚固体；（6）封锚。本发明能够有效避免出现缩颈、塌孔的情况，并能够提高抗浮锚杆的耐久性。
Anti-floating anchor rotary jet grouting construction method for soft stratum
一种软弱地层抗浮锚杆旋喷施工方法
DENG YU (author) / JIANG KAI (author) / MENG BAOHUA (author) / ZHANG NING (author) / XUE PENG (author)
2022-03-25
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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