双江口水电站碾压试验掺砾土料研究

Study on Gravel Soil Material for Rolling Test at Shuangjiangkou Hydropower Station

按照设计方案,双江口水电站掺砾土料的生产采用系统生产的方式,但由于目前系统尚未完建,经参建各方商讨采用平铺立采的方式生产供碾压试验用的掺砾土料。正式生产前,分别进行室外掺合试验2次,室内掺合试验1次,确定掺配遍数按4遍控制,掺配比例则根据掺合试验结果及上一批次掺砾土料掺配结果适时调整。通过掺砾土料的生产可知,在掺砾土料的平铺立采生产过程中,为取得更优的掺配效果,需根据土料及砾石料的级配检测结果适时调整掺配比例。

According to the design scheme,the production of gravel soil at Shuangjiangkou Hydropower Station adopts the system production method.However,since the system has not been completed at present,the parties involved in the construction discuss to use the method of horizontal paving and vertical mining to produce gravel soil material for rolling test.Before formal production,outdoor mixing test shall be carried out twice and indoor mixing test shall be carried out once,and the mixing times shall be determined to be four times.The mixing proportion shall be adjusted timely according to the mixing test results and the mixing results of the last gravel soil materials.It can be seen from the production of gravel soil material that in order to achieve better mixing effect during the process of horizontal paving and vertical mining of,the mixing proportion should be adjusted timely according to the grading test results of soil and gravel material.