提高坝体土方填筑一次合格率

宁夏固原地区(宁夏中南部)城乡饮水安全水源工程中庄水库由于料源多,料场开挖跨度大,土料含水率过高、过低分布不均,造成一次性碾压合格率较低,给工程质量控制带来一定难度,并严重影响工程进度.为了解决这个问题,由项目法人组织承包人成立QC小组,通过QC小组活动,以铧犁翻晒、坝面翻倒补水掺合的方式有效地解决了土方填筑含水率过高、过低的问题,施工质量得到有效的控制.均质土坝在西北地区由于其造价低、稳定性强的特点,在西北地区得到了广泛的应用.

Improvement of the first pass yield of dam earthwork filling

Zhongzhuang Reservoir of the urban and rural drinking water safety water supply project in Ningxia Guyuan (Central and Southern Ningxia) is characterized by excessive material sources,large yard excavation span,too high soil moisture content and too low uneven distribution,therefore the first pass yield of rolling is lower,certain difficulty is produced on project quality control,and the project progress is affected seriously.The project legal person organizes contractors to establish a QC group in order to solve the problem.The problems of too high and too low moisture content in soil filling are effectively solved by activities of the QC group through the following modes: overturning and drying by plough,water filling and mixing by dam face turning.The construction quality can be controlled effectively.Homogeneous earth dams are widely applied in Northwest China due to low cost and high stability.