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一、工程概况该技术应用在衡广复线DIk2006+551～+922.7段,该段为于武水河右岸,地表自然坡度达40°,表层有1～5米厚的砂粘土尖碎石层或硬土,下伏基岩为寒武纪板状页岩夹长石石英砂岩或两者的互层岩层破碎,节理发育,风化层厚。常年3～9月为雨季,雨量丰富,地表冲沟深,路基破土后易坍方。限于地表坡度陡,地质条件差,线路两头有1～2Km的隧道控制,该段设计成上下挡墙群。路基处于5.4‰～5.7‰的纵向下
First, the project profile The technology used in Heng Kwong double line DIk2006 +551 ~ +922.7 paragraph, this section is on the right bank of the Wusui River, the natural slope of the earth surface of 40 °, the surface of 1 to 5 meters thick sand clay gravel layer or Hard rock, the underlying bedrock for the Cambrian plate-shaped shale intercalated quartzite sandstone or interbedded layers of rock fracture, joint development, weathering thick. Perennial 3-9 months for the rainy season, abundant rainfall, surface gully deep, after the collapse of the roadbed easily collapsed. Limited to the steep slope of the surface, poor geological conditions, the line has 1 ~ 2Km tunnel control at both ends, the section designed as a group of upper and lower retaining wall. Roadbed at 5.4 ‰ ~ 5.7 ‰ longitudinal