处理措施有:挖填、跨盖、灌注和排导等。
①挖填:即挖除岩溶形态中的软弱充填物,回填碎石、灰土或素混凝土等。以增强地基的强度和完整性。或在压缩性地基上凿去局部突出的基岩,铺盖可压缩的垫层(褥垫),以调整地基的变形量。
②跨盖:基础下有溶洞、溶槽、漏斗、小型溶洞等,可采用钢筋混凝土梁板跨越,或用刚性大的平板基础覆盖,但支承点必须放在较完整的岩石上。也可用调整柱距的方法处理。
③灌注:基础下的溶洞埋藏较深时,可通过钻孔向洞内灌注水泥砂浆、混凝土或沥青等,以堵填溶洞。
④排导:对建筑物地基内或附近的地下水宜采用排水隧洞、排水管道等进行流排,以防止水流通道堵塞,造成场地和地基季节性淹没。
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