一、滑坡发生简况龙坎线位于福建省西北部,起点龙岩,终点坎市。K25滑坡,发生于1973年5月雨季,1974年设计边坡渗沟及抗滑挡墙。挡墙基础为6m深的挖孔桩,1978年竣工。1983年3月29日首先出现天沟断裂,山坡多处变形。4月29日至5月6日变形加剧,挡墙剪断,位移达200mm;线路拱起500mm,外移600mm;涵洞出口沟底推裂。两次整治费用约80万元。 First, the occurrence of landslides Longtan line is located in northwestern Fujian Province, the starting point Longyan, End City Kan. K25 landslide occurred in the May 1973 rainy season. In 1974, it designed slope seepage ditches and anti-skid walls. Retaining wall foundation for the 6m deep hole digging pile, completed in 1978. March 29, 1983 first appeared gutter fracture, multiple deformation of the hillside. From April 29 to May 6, the deformation intensified and the retaining wall cut off and the displacement reached 200mm. The line arched 500mm and moved 600mm outwardly. The culvert exit ditch cracked. Two remediation costs about 800,000 yuan.