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A platform for research: civil engineering, architecture and urbanism
Reaming self-locking type prestressed anti-floating anchor rod construction method
The invention provides a reaming self-locking type prestress anti-floating anchor rod construction method. The method comprises the following steps that S1, an anchor rod mounting positioning point is determined on a cushion layer, the positioning point is excavated downwards to form a hole groove, and the cushion layer is poured; S2, an anchoring hole is drilled downwards along the hole groove to a moderately weathered rock stratum, and a conical hole is formed in the bottom of the anchoring hole; S3, a rod body of the self-locking anchor rod is downwards implanted into the anchoring hole from the hole groove, an expansion head at the bottom end of the rod body is opened to be locked with the conical hole, and a reliable mechanical self-locking key is formed for bearing; S4, a spiral stirrup is placed in the hole groove; S5, grouting materials are poured into the anchoring hole and the conical hole through the hole groove; S6, tensioning force is applied to the self-locking anchor rod, and the self-locking anchor rod is locked; S7, a waterproof layer is paved on the top surface of the cushion layer; and S8, an underground structure bottom plate is poured on the cushion layer. By the adoption of the anti-floating anchor rod, the technical problems of tensioning and locking of the pre-stressed anchor rod are effectively solved, and the problems of cracking of an anchoring body, corrosion of a reinforcing steel bar body and water proofing of a bottom plate are solved.
本发明提出了一种扩孔自锁式预应力抗浮锚杆施工方法，包括：步骤1、在垫层上确定锚杆安装定位点，在定位点处向下开挖成出孔槽，并浇筑垫层；步骤2、沿孔槽向下钻锚固孔至中风化岩层，并在锚固孔底部扩锥形孔；步骤3、将自锁锚杆的杆体由孔槽向下植入到锚固孔，并杆体底端的扩大头张开与锥形孔锁紧，形成可靠的机械自锁键并进行承载；步骤4、在孔槽内放置螺旋箍筋；步骤5、由孔槽向锚固孔及锥形孔内灌注注浆料；步骤6、对自锁锚杆施加张拉力，并锁紧；步骤7、在垫层顶面铺设防水；步骤8、在垫层上浇筑地下结构底板。采用本发明的抗浮锚杆有效的解决了预应力锚杆张拉及锁定的技术难题，克服了锚固体开裂、钢筋体锈蚀及底板防水的问题。
Reaming self-locking type prestressed anti-floating anchor rod construction method
The invention provides a reaming self-locking type prestress anti-floating anchor rod construction method. The method comprises the following steps that S1, an anchor rod mounting positioning point is determined on a cushion layer, the positioning point is excavated downwards to form a hole groove, and the cushion layer is poured; S2, an anchoring hole is drilled downwards along the hole groove to a moderately weathered rock stratum, and a conical hole is formed in the bottom of the anchoring hole; S3, a rod body of the self-locking anchor rod is downwards implanted into the anchoring hole from the hole groove, an expansion head at the bottom end of the rod body is opened to be locked with the conical hole, and a reliable mechanical self-locking key is formed for bearing; S4, a spiral stirrup is placed in the hole groove; S5, grouting materials are poured into the anchoring hole and the conical hole through the hole groove; S6, tensioning force is applied to the self-locking anchor rod, and the self-locking anchor rod is locked; S7, a waterproof layer is paved on the top surface of the cushion layer; and S8, an underground structure bottom plate is poured on the cushion layer. By the adoption of the anti-floating anchor rod, the technical problems of tensioning and locking of the pre-stressed anchor rod are effectively solved, and the problems of cracking of an anchoring body, corrosion of a reinforcing steel bar body and water proofing of a bottom plate are solved.
本发明提出了一种扩孔自锁式预应力抗浮锚杆施工方法，包括：步骤1、在垫层上确定锚杆安装定位点，在定位点处向下开挖成出孔槽，并浇筑垫层；步骤2、沿孔槽向下钻锚固孔至中风化岩层，并在锚固孔底部扩锥形孔；步骤3、将自锁锚杆的杆体由孔槽向下植入到锚固孔，并杆体底端的扩大头张开与锥形孔锁紧，形成可靠的机械自锁键并进行承载；步骤4、在孔槽内放置螺旋箍筋；步骤5、由孔槽向锚固孔及锥形孔内灌注注浆料；步骤6、对自锁锚杆施加张拉力，并锁紧；步骤7、在垫层顶面铺设防水；步骤8、在垫层上浇筑地下结构底板。采用本发明的抗浮锚杆有效的解决了预应力锚杆张拉及锁定的技术难题，克服了锚固体开裂、钢筋体锈蚀及底板防水的问题。
Reaming self-locking type prestressed anti-floating anchor rod construction method
一种扩孔自锁式预应力抗浮锚杆施工方法
ZHOU JIANBO (author) / GAO ZUOPING (author) / DAI YANHUI (author) / LIAO JIEHONG (author) / ZHOU ZHIYONG (author)
2021-07-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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