溶洞裂隙发育地区大直径钻孔嵌岩桩基施工

Large Diameter Bored Rock-socketed Pile Foundation Construction in Karst Fissure Development Area

文章结合徐州三环西路高架快速路工程XS-LQ2标段桥梁钻孔桩基施工,针对溶洞裂隙发育导致的孔内泥浆流失,造成钻孔桩基坍孔的问题,采用回填粘土、片石、袋装水泥、稻草、灌注混凝土等方法有效地解决了溶岩桩基溶洞裂隙处理,大大降低了坍孔、埋钻的安全风险。可在类似工程中借鉴实施。

This article is based on the construction of the elevated expressway bridge engineering section XS - LQ2 bored pile foundatlon in the third ring west road in Xuzhou. In view of the karst cave fracture causing mud loss in holes and leading to bored pile slumping hole, the backfilled clay, flaky, bagged cement, rice straw, pouring concrete and other methods are adopted for the lava pile foundation cave crack processing, which greatly reduces the security risks of slumping hole and burying bit. It can be used in similar !aroiects.