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贵广高铁通过岩溶发育区,在勘查时未能施工处理,溶洞、断裂和岩溶水将会在通车时造成危害。贵广高铁在联调联试阶段发现了隧道中道床底鼓的问题,决定作全线补充探查。作者承担了贵广高铁14座隧道的探查,每条隧道设三条平行测线,测线总里程近70 km。采用陆地声纳法,在探查0~13 m深、投影直径≥1 m的溶洞方面取得了好的效果。现场数据采集效率可达3 km/台班,并采用3个组和3台仪器同时并排工作,提高采集工作效率,并在不到一个月时间内完成了资料处理及解释工作。对探查出的4 491个溶洞,根据埋深和投影直径做了分级并在剖面图上标示。
Guiyang-Guangzhou High-speed Rail passes through the karst development zone and fails to be constructed during the survey. Karst caves, fractures and karst water will cause damage during the opening to traffic. Guiyang-Guangzhou High-speed Railway in the joint trial phase found the middle of the tunnel bed drum problem, decided to make full complement exploration. The author undertook the exploration of 14 tunnels of Gui-Guang Railways, each with three parallel lines measuring a total length of nearly 70 km. Using land sonar method, good results have been obtained in exploring caves with depth of 0 ~ 13 m and projection diameter of ≥1 m. Field data collection efficiency of up to 3 km / shift, and the use of 3 groups and 3 instruments simultaneously work side by side to improve the collection efficiency, and in less than a month to complete the data processing and interpretation. The 4 491 karst holes explored were graded according to burial depth and projection diameter and marked on the profile.