岩溶地质条件下人工挖孔桩综合成桩施工技术应用讨论岩溶地质条件下人工挖孔桩综合成桩施工技术应用讨论 摘要：岩溶地区场地内地质及水文地质构造多变，地层表面高差较大，地层内常隐藏着残积层、溶洞、溶槽等复杂状况，往往还蕴含丰富的地下水、地表水、和不同类型风化岩层和残积土层，工程地质情况复杂。在岩溶地带施工人工成孔桩常常会遇到穿越含丰富地下水的弱风化岩层、砂卵石冲洪积层、溶洞等地质情况，复杂的地质状况将直接影响着人工挖孔桩成桩的施工安全和施工进展。根据传统方法为确保施工安全和成桩质量需由相关单位进行地基处理或重新修改基础方案，然后才能进行下道工序施工，如此将造成施工单位的人工、机械设备的停窝工损失，延长工期，同时也将增加建设单位的建设投资，难以满足业主方的建设工期要求和投资目标控制。 Abstract: the karst areas within the geological and hydrogeological structure changing, the surface strata with large height difference, often hidden eluvium, cave, solution groove in complex condition, often also contains rich groundwater, surface water, and the different types of rock weathering and residual soil, engineering geological condition complex. In the construction of artificial hole pile in karst areas often encounter through the rich groundwater weak weathered rock, sand and gravel alluvium and diluvium, karst geological conditions, complex geological conditions will directly affect the artificial hole digging Zhuangcheng pile construction safety and construction progress. According to the traditional method in order to ensure the construction safety and quality of pile foundation treatment is required by the relevant units or to modify the basic scheme, and then carry out the procedure of construction, so will cause the construction unit of the artificial, mechanical equipment idle stop loss, extension of time, and will also increase the construction unit construction investment, difficult to meet the owner the constr...
