明挖沟槽回填现场碾压参数的确定

In -situ Test for Determination of Pa rametcrs of Rolling for Open Cut Tren ch Backfill

万家寨引黄工程联接段长距离、大口径PCCP明挖沟槽回填通过就地选取回填料进行现场试验来确定碾压参数的方法可为国内同类工程施工提供参考。

what is called'Connetion works',139.45km long,is a part of the south main line,Wanjiazhai YRDP(Yellow River Diversion Project),of which 43.21km long are to be open c ut to bury the cccp(Prestressed Concrete cylimder pipe)with three meters internal diameter in the trench cut .The local materials were used for back filling of the trench.The in -situ test for dete rming the parameters such as the numb er of the passes which conform to the requirement in design selected of th e roller was made for selected sample s taken from Bid.No2range,35.4km lo ng within the total open cut length of th e trench.In this paper,the in -situ t est for determination of the parameters of rolling of two kinds of the rollers are mainly introduced.