锚固桩技术在石灰岩地区钻孔灌注桩施工中的应用

Application of Anchored Pile Technology in Construction of Cast-in-site Pile in Limestone Region

该文以湖南省衡山县龙荫港大桥为例,介绍了锚固桩技术在石灰岩地区钻孔灌注桩施工中应用。该锚固桩是一种加固建筑物基础的桩。此措施具有投入机具简单,资金节省,施工进度快,质量好,安全性高,效果特别明显等特点,尤其适合基底有溶沟、溶槽、石芽、裂隙及溶洞的石灰岩(喀斯特)地区钻孔灌注桩的处理、加固。该技术解决了桩基长短悬殊及桩底沉渣超标,以及继续处理持力层等问题,可供同行参考。

The article introduces the application of anchored pile technology in the construction of cast-in-site pile in the limestone regions by Hunan Province Hengshan County Longyingang Bridge.This anchored pile is a pile to reinforce the foundation of building.This measure has the characteristics of machines to simply invested,economical fund,fast construction schedule,good quality,high security and especially obvious effect,which is especially adapted to the treatment and reinforcement of the cast-in-site pile in the limestone(karst) region with the base of grike,dissolving groove,clint,crack and limestone cave.This technology solves the problems of the different lengths of pile foundation,the out-of-standard dregs at pile bed and the continuous treatment of bearing stratum,which can be referred for the similar projects.