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Paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system and construction method thereof
The invention discloses a paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system and a construction method thereof. According to the construction method, a self-drilling type hollow grouting anchor rod meeting the design requirement is directly used, and a drilling and grouting integrated in-situ impact extrusion grouting method is adopted, and middle-high pressure paste slurry impact extrusion drilling and grouting are conducted on full-hole section surrounding soil from top to bottom; and then a paste slurry pulse high-pressure pile squeezing and splitting method is adopted for conducting segmented reciprocating high-pressure paste slurry impact extrusion expanding grouting on an expanded-head anchoring hole section from bottom to top, after the expanded-head anchoring section meeting the design requirement is formed, middle-high pressure paste slurry impact extrusion drilling and grouting are conducted from top to bottom, and the self-drillingtype hollow grouting anchor rod is installed in place, so that the composite anchor rod structure system is formed, wherein the composite anchor rod structure system is combined with the self-drilling type hollow grouting anchor rod, and the composite anchor rod structure system is composed of upper non-anchored section middle-high pressure paste slurry impact extrusion grouting composite surrounding soil, a lower anchored section high-pressure paste slurry impact-extrusion expanded head pile body, a pile periphery slurry extrusion and splitting vein and a compacted soil body. The paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system is convenient to construct, small in waste slurry amount, safe, environment-friendly and controllable in quality.
本发明公开了一种膏浆钻灌冲挤扩大头锚杆结构体系及其施工方法。所述施工方法直接使用符合设计要求的自钻式中空注浆锚杆采用钻灌一体原位冲挤灌浆方法，先对全孔段围土自上而下进行中高压膏浆冲挤钻灌，而后采用膏浆脉冲高压挤劈桩方法自下而上对扩大头锚固孔段进行分段往复高压膏浆冲挤挤扩灌注，形成符合设计要求的扩大头锚固段后，再自上而下进行中高压膏浆冲挤钻灌将自钻式中空注浆锚杆安装到位，形成一种与自钻式中空注浆锚杆结合的上部非锚固段中高压膏浆冲挤灌浆复合围土与下部锚固段高压膏浆冲挤扩大头桩体与桩周挤劈浆脉及挤密土体复合型锚杆结构体系。本发明施工便捷、弃浆量小、安全环保、质量可控。
Paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system and construction method thereof
The invention discloses a paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system and a construction method thereof. According to the construction method, a self-drilling type hollow grouting anchor rod meeting the design requirement is directly used, and a drilling and grouting integrated in-situ impact extrusion grouting method is adopted, and middle-high pressure paste slurry impact extrusion drilling and grouting are conducted on full-hole section surrounding soil from top to bottom; and then a paste slurry pulse high-pressure pile squeezing and splitting method is adopted for conducting segmented reciprocating high-pressure paste slurry impact extrusion expanding grouting on an expanded-head anchoring hole section from bottom to top, after the expanded-head anchoring section meeting the design requirement is formed, middle-high pressure paste slurry impact extrusion drilling and grouting are conducted from top to bottom, and the self-drillingtype hollow grouting anchor rod is installed in place, so that the composite anchor rod structure system is formed, wherein the composite anchor rod structure system is combined with the self-drilling type hollow grouting anchor rod, and the composite anchor rod structure system is composed of upper non-anchored section middle-high pressure paste slurry impact extrusion grouting composite surrounding soil, a lower anchored section high-pressure paste slurry impact-extrusion expanded head pile body, a pile periphery slurry extrusion and splitting vein and a compacted soil body. The paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system is convenient to construct, small in waste slurry amount, safe, environment-friendly and controllable in quality.
本发明公开了一种膏浆钻灌冲挤扩大头锚杆结构体系及其施工方法。所述施工方法直接使用符合设计要求的自钻式中空注浆锚杆采用钻灌一体原位冲挤灌浆方法，先对全孔段围土自上而下进行中高压膏浆冲挤钻灌，而后采用膏浆脉冲高压挤劈桩方法自下而上对扩大头锚固孔段进行分段往复高压膏浆冲挤挤扩灌注，形成符合设计要求的扩大头锚固段后，再自上而下进行中高压膏浆冲挤钻灌将自钻式中空注浆锚杆安装到位，形成一种与自钻式中空注浆锚杆结合的上部非锚固段中高压膏浆冲挤灌浆复合围土与下部锚固段高压膏浆冲挤扩大头桩体与桩周挤劈浆脉及挤密土体复合型锚杆结构体系。本发明施工便捷、弃浆量小、安全环保、质量可控。
Paste slurry drilling, grouting and impact extrusion expanded-head anchor rod structure system and construction method thereof
一种膏浆钻灌冲挤扩大头锚杆结构体系及其施工方法
CHEN ANZHONG (author) / LI YONGFENG (author) / WANG SHAOHUA (author) / ZENG LAIHENG (author) / XIA YUBIN (author) / HUANG CHAOQUN (author)
2020-11-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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