摘要
在我国南方城市建设中,作为承载建筑物的灰岩、白云岩等硬质岩层往往发育大小、深度不一的溶洞。为确保城市建筑安全,迫切需要查明建设场地内岩溶发育情况。南方某小区岩溶发育深度大多位于地下10m以浅,岩洞规模从0. 7～2. 1m不等。通过地质雷达试验,确定施工参数为:频率80Hz,测线14条,线距5m,点距0. 3m,。根据各测线剖面图圈定的异常,确认小区21#楼范围内主要有3个小溶洞,其中1个深度为6. 5～9m,另2个深度为4～7m。
In southern Chinese city reconstructions,the limestone and dolomite as the building foundation usually have developed karst caves with different sizes and depths.To ensure the safety of urban buildings,construction site karstic development situation ascertaining is urgently needed.The karstic development depth of a southern residential area is mostly above depth 10m with sizes from 0.7m^2.1m.Through ground penetrating radar prospecting with operation parameters of frequency 80HZ,survey line 14,line interval 5m and point interval 0.3m.according to survey line delineated anomalies,have mainly identified 3 small karst caves,one of them has depth of 6.5~9m,another two 4~7m within residential area building No.21 range.
作者
王庆学
Wang Qingxue(China Coal Geology Group Co.Ltd.,Beijing 100040)
出处
《中国煤炭地质》
2018年第12期102-105,112,共5页
Coal Geology of China
关键词
地质雷达
溶洞
中心频率
ground penetrating radar
karst cave
center frequency
