The impervious wall of this project is located in waterbearingsand and gravel, the collapse hole takes place due to some factor affect, the deep well lower water level measures are adopted.
本工程防渗墙在富含水砂卵砾石地层施工中，由于各种因素引起严重塌孔，施工中采用了深井井上降水措施。
2
Oil bearing evaluation of low salinity water shaly sand reservoirs in the Liudong area is a difficult problem in log interpretation.