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A platform for research: civil engineering, architecture and urbanism
Construction method of bead-like karst cave pile foundation in karst development area
The invention discloses a construction method for a bead-shaped karst cave pile foundation in a karst development area, and relates to the technical field of karst cave pile foundation construction. A drilling machine is in place, and the drilling machine is moved to the drilling operation working condition; embedding a double-layer steel sleeve; drilling holes; detecting holes; cleaning the hole; hoisting a reinforcement cage; placing a conduit; cleaning the hole for the second time; underwater concrete is poured; the permanent inner casing pipe moves to the bottom, and the temporary outer casing pipe is pulled out and reused; and jumping to lay a pile foundation. Through the full-casing follow-up technology, the full-rotation equipment drives the steel casing to rotate by 360 degrees, downward pressure and torque are generated, the high-strength tool bit at the opening of the casing is driven to cut a soil body and a rock stratum, the casing is used for protecting the wall, rock and soil in the steel casing are grabbed out through the rotary drill, and hole cleaning is conducted; the foundation construction problem of the bridge pile foundation in the karst area is solved, the advantages are obvious, the cost is reduced, the construction period is short, and the pile forming rate is high.
本发明公开了一种岩溶发育地区串珠状溶洞桩基施工方法，涉及溶洞桩基施工技术领域，步骤包括：桩位测量放样；钻机就位，将钻机移至钻孔作业工况处；埋设双层钢套管；钻孔；检孔；清孔；钢筋笼吊装；安放导管；二次清孔；灌注水下混凝土；永久内套管跟进到底，临时外套管拔出，重复利用；跳打下一个桩基。本发明通过全套管跟进技术，全回转设备驱动钢套管进行360°回转，产生下压力和扭矩，带动套管管口的高强刀头对土体、岩层进行切削，利用套管作为护壁作用，旋挖钻将钢套管内的岩土抓出，并进行清孔，解决了岩溶地区桥梁桩基基础施工问题，优势明显，减少成本，施工周期短，成桩率高。
Construction method of bead-like karst cave pile foundation in karst development area
The invention discloses a construction method for a bead-shaped karst cave pile foundation in a karst development area, and relates to the technical field of karst cave pile foundation construction. A drilling machine is in place, and the drilling machine is moved to the drilling operation working condition; embedding a double-layer steel sleeve; drilling holes; detecting holes; cleaning the hole; hoisting a reinforcement cage; placing a conduit; cleaning the hole for the second time; underwater concrete is poured; the permanent inner casing pipe moves to the bottom, and the temporary outer casing pipe is pulled out and reused; and jumping to lay a pile foundation. Through the full-casing follow-up technology, the full-rotation equipment drives the steel casing to rotate by 360 degrees, downward pressure and torque are generated, the high-strength tool bit at the opening of the casing is driven to cut a soil body and a rock stratum, the casing is used for protecting the wall, rock and soil in the steel casing are grabbed out through the rotary drill, and hole cleaning is conducted; the foundation construction problem of the bridge pile foundation in the karst area is solved, the advantages are obvious, the cost is reduced, the construction period is short, and the pile forming rate is high.
本发明公开了一种岩溶发育地区串珠状溶洞桩基施工方法，涉及溶洞桩基施工技术领域，步骤包括：桩位测量放样；钻机就位，将钻机移至钻孔作业工况处；埋设双层钢套管；钻孔；检孔；清孔；钢筋笼吊装；安放导管；二次清孔；灌注水下混凝土；永久内套管跟进到底，临时外套管拔出，重复利用；跳打下一个桩基。本发明通过全套管跟进技术，全回转设备驱动钢套管进行360°回转，产生下压力和扭矩，带动套管管口的高强刀头对土体、岩层进行切削，利用套管作为护壁作用，旋挖钻将钢套管内的岩土抓出，并进行清孔，解决了岩溶地区桥梁桩基基础施工问题，优势明显，减少成本，施工周期短，成桩率高。
Construction method of bead-like karst cave pile foundation in karst development area
一种岩溶发育地区串珠状溶洞桩基施工方法
HE WENJIANG (author) / CAO JIANFENG (author) / GONG YANG (author) / LIU GUANGMING (author) / ZHANG XINLIANG (author) / WANG ZENGHUA (author) / WU CHEN (author) / LIU SHENGQIANG (author) / LAN PING (author) / WANG PENGXIANG (author)
2022-11-22
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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