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土坝施工过程中要按规定数量取样,测定土料含水量和干容重,以检验压实干容重是否符合设计要求.但在检验过程中,往往将取样区间的质量情况视作均一的,因而只凭单一的试验结果作出合格或不合格的结论.实际上,土料压实干容重在取样区间内的分布是不均匀的,单一试验值并不能完全反映压实质量,因此除了了解干容重数值情况外,还必须研究质量均匀程度.同时为了达到合格率要求,其平均干容重应大于或等于某一控制值,目前仅以设计值进行控制,那么将会出现合格率偏低的情况.例如文献中,施工检查样结果认为全部合格,而复查样合格率仅达到80%左右,对于这现
During the process of earth dam construction, samples shall be taken according to the required quantity to determine the soil moisture content and dry bulk density to check if the compacted dry bulk density meets the design requirements, but in the inspection process, the quality of the sampling interval is often regarded as uniform and thus only In fact, the distribution of soil compaction dry bulk density in the sampling interval is not uniform, the single test value does not fully reflect the compaction quality, so in addition to understanding the value of dry bulk density In addition, it is also necessary to study the quality uniformity, meanwhile, the average dry weight should be greater than or equal to a certain control value in order to meet the requirements of passing rate, and only the control of the design value at present will result in the low passing rate. In the construction inspection results that all qualified, but the re-examination of the pass rate of only 80% or so, for this is