兰新高铁化学固沙防护工程试验研究

基于室内试验,对4种固沙剂的各项性能指标进行了测试和分析,并在烟墩风区开展现场试验。室内试验结果表明:固沙剂的黏度随着温度降低呈增大的趋势,在-20℃时出现结冰现象;固沙剂浸水后表面有溶胀现象,但风蚀量均小于1%;固化层平均厚度依次为A型>B型>C型>D型,B型层厚最均匀;风洞试验中固沙剂的质量损失率都小于1%,均具有良好的抗风蚀能力;时效性A型最优,成本A、D型最高。现场试验表明:喷洒固沙剂的沙方格抗风蚀能力明显强于未喷洒固沙剂的沙方格,喷洒固化剂的沙方格有效地发挥了固沙作用。

Experimental Research on Protective Engineering of Chemical Sand-Fixation along Lanzhou-Xinjiang High Speed Railway Line

Various properties of four kinds of sand fixing agent are analyzed based on laboratory tests,,and field tests are carried out in Yandun wind zone. Laboratory test results show that sand fixing agent viscosity decreases with the temperature increase and freezing occurs when the temperature is-20 ℃; the surface of sand fixing agent swells after being soaked in water,but the wind erosion is less than 1%; the average thickness of different solidified layers is ranked as type A > type B > type C > type D,and the thickness of type B is the most uniform; the mass loss of sand fixing agents are all less than 1% m,demonstrating good wind erosion resistance; the timeliness of type A is the best,Type A and D are the highest in cost. The field tests show that resistance to wind erosion of sand-box sprayed with sand fixing agent is obviously stronger than that of the sand-box without sand fixing agent,and the sand-box sprayed with sand fixing agent has played an effective role in sand fixing.