引黄工程砂石料现状与解决思路

Analysis on the Present Situation of Aggregate in the YRDP

引黄工程规模大、战线长，砂石料用量大，仅一期工程需２３６万ｍ３。目前，砂料主要来源于河曲县大东梁砂料场，碎石则是从工程附近私营石料场购买或承包商自己加工破碎。１９９６年１２月和１９９７年１１月两次对砂石料进行质量检测，发现砂料粒径偏细，碎石超逊径含量超标等质量问题。为保证工程质量，降低工程造价，通过分析砂石料场的质量、储量、开采及运输等因素，提出将枢纽砂石料加工厂及上土寨砂石料加工厂人工砂石料作为工程的主要料源，并划分其供应范围，国际Ⅱ、Ⅲ标可由承包商自己加工砂石料。联接段工程砂料缺乏，所选砂料场运距远，费用高，建议统一加工砂石料。

The YRDP will have a large consumption of aggregate as its large scale and long conveyance,2,360,000 m 3 of aggregate is needed only in the first phase.At present situation,sand is mainly obtained fron the Dadongliang aggregate reclaiming plant and crushed stone is purchased from the privately owned crushing mill nearby or manufactured by contractors themselves.However,the quality problems that too fine is the sand,more than what is specified is the oversize or subsize content of the crush stone were found by the quality test on Dec.1996 and Nov.1997.In order to ensure the project quality and decrease the project cost,based upon the analysis on situations of the quality,the storage volume,and the conditions of mining amd transportation,the writer put forward the suggestion that the reclainming plants at the dam site and Shangtuzhai should be considered to be main aggregate sources,their supply scope should also be stipulated,the aggregate for International Bids may be manufactured by the contractors themselves,the aggregate for the Connection Works should be processed unitedly as the lackness of aggregate nearby,the long transportation distance and high cost of the selected aggregate reclaiming plant.