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A platform for research: civil engineering, architecture and urbanism
Underwater anchor rod construction method applied to water-rich pebble stratum
The invention relates to the technical field of anchor rod construction, in particular to an underwater anchor rod construction method applied to a water-rich pebble stratum, which comprises the following steps of: 1, constructing a waterproof curtain around a foundation pit; 2, soil is excavated in the foundation pit to the height 0.2 m above the water level in the foundation pit to serve as a construction datum plane, and the water level in the foundation pit is kept equal to the water level outside the foundation pit; 3, an embedded steel sleeve larger than a drilling machine sleeve is embedded at the position H/tan theta away from the waterproof curtain according to the designed inclination angle, the embedded steel sleeve is backfilled and compacted firstly, then cement paste is injected to fix the embedded steel sleeve, H is the vertical distance between the anchor rod and the construction datum plane in the foundation pit, and theta is the inclination angle of the anchor rod inclination angle; water pressure inside and outside the foundation pit can be kept balanced, water gushing and sand gushing can be avoided, the risk caused by the fact that cement paste in the pebble bed is taken away by flowing underground water is made up through secondary grouting, and finally it is guaranteed that the hole is not leaked through the method that cement and water glass double-liquid paste is injected into the hole.
本发明涉及锚杆施工技术领域，具体地说，涉及一种应用于富水卵石地层的水下锚杆施工方法，包括以下步骤：步骤1：在基坑周圈施工好止水帷幕；步骤2：在基坑内挖土到基坑内水位以上0.2m的高度作为施工基准面，且保持基坑内水位和基坑外水位相等；步骤3：在距离止水帷幕H/tanθ的位置按设计倾角角度埋设比钻机套管大的预埋钢套管，先回填并压实卵石再注入水泥浆将预埋钢套管固定，H为锚杆与基坑内施工基准面的垂直距离，θ为锚杆倾角的倾角角度；本发明可以保持基坑内外水压力平衡，可以避免涌水涌砂的发生，采用二次压浆弥补卵石层中水泥浆被流动的地下水带走所产生的风险，最后采用孔口注入水泥水玻璃双液浆的方法保证孔口不渗漏。
Underwater anchor rod construction method applied to water-rich pebble stratum
The invention relates to the technical field of anchor rod construction, in particular to an underwater anchor rod construction method applied to a water-rich pebble stratum, which comprises the following steps of: 1, constructing a waterproof curtain around a foundation pit; 2, soil is excavated in the foundation pit to the height 0.2 m above the water level in the foundation pit to serve as a construction datum plane, and the water level in the foundation pit is kept equal to the water level outside the foundation pit; 3, an embedded steel sleeve larger than a drilling machine sleeve is embedded at the position H/tan theta away from the waterproof curtain according to the designed inclination angle, the embedded steel sleeve is backfilled and compacted firstly, then cement paste is injected to fix the embedded steel sleeve, H is the vertical distance between the anchor rod and the construction datum plane in the foundation pit, and theta is the inclination angle of the anchor rod inclination angle; water pressure inside and outside the foundation pit can be kept balanced, water gushing and sand gushing can be avoided, the risk caused by the fact that cement paste in the pebble bed is taken away by flowing underground water is made up through secondary grouting, and finally it is guaranteed that the hole is not leaked through the method that cement and water glass double-liquid paste is injected into the hole.
本发明涉及锚杆施工技术领域，具体地说，涉及一种应用于富水卵石地层的水下锚杆施工方法，包括以下步骤：步骤1：在基坑周圈施工好止水帷幕；步骤2：在基坑内挖土到基坑内水位以上0.2m的高度作为施工基准面，且保持基坑内水位和基坑外水位相等；步骤3：在距离止水帷幕H/tanθ的位置按设计倾角角度埋设比钻机套管大的预埋钢套管，先回填并压实卵石再注入水泥浆将预埋钢套管固定，H为锚杆与基坑内施工基准面的垂直距离，θ为锚杆倾角的倾角角度；本发明可以保持基坑内外水压力平衡，可以避免涌水涌砂的发生，采用二次压浆弥补卵石层中水泥浆被流动的地下水带走所产生的风险，最后采用孔口注入水泥水玻璃双液浆的方法保证孔口不渗漏。
Underwater anchor rod construction method applied to water-rich pebble stratum
一种应用于富水卵石地层的水下锚杆施工方法
HE SHIXUAN (author) / LIU LAIXIN (author) / ZHANG CHUNBO (author) / ZONG SHICHANG (author) / CUI SHUAI (author) / ZHANG BO (author) / CHEN CHUN (author) / QU ZHENG (author) / LI FANG (author) / SUN JIAN (author)
2025-01-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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