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黄土水蚀破坏在西气东输管线在施工过程中较为严重。针对这一工程问题,选取陕西省子长县至永坪镇段的黄土样作为研究对象,在航片解译、野外勘察等环境地质调查手段的基础上,通过室内抗压、渗透、崩解等物理力学试验,总结出不同掺量下的木质素高分子固化剂在固化黄土的机理以及抗水蚀能力变化规律。结果表明:黄土经适量木质素高分子固化剂加固后,其力学性质得到不同程度改善;当固化剂掺量4%,使用拌合法加固后的土样渗透系数基本没有降低,不妨碍加固后黄土地区地下水的正常排泄途径;其次,黄土的抗水蚀能力显著提高且固化剂中的微量元素有益于植被生长;试验表明该固化剂在黄土高原地区对于水蚀破坏的防治具有良好效果。
Loess erosion damage in the West-East gas pipeline construction process is more serious. In view of this engineering problem, loess samples from Zichang County to Yongping Town in Shaanxi Province were selected as the research object. Based on the means of environmental geological survey such as aerial interpretation and field investigation, the loess samples were compressed, infiltrated and disintegrated And other physical and mechanical tests, summed up the different dosage of lignin polymer curing agent in the mechanism of solidification of loess and water erosion resistance changes. The results show that the mechanical properties of loess are improved to a certain extent after the proper amount of lignin polymer hardener is hardened. When the content of hardener is 4%, the permeability coefficient of soil samples strengthened with the mixing method basically does not decrease, Secondly, the water erosion resistance of loess increased significantly and the trace elements in the curing agent benefited vegetation growth. Experiments show that the curing agent has good effect in the prevention and control of water erosion damage in the Loess Plateau.