一、前言在毛主席革命路线指引下,在党的“鼓足干劲,力争上游,多快好省地建设社会主义”总路线的光辉照耀下,我县在学习兄弟单位和外地先进经验的基础上,结合实际情况,于一九七三年冬在本县朱坊水库东干渠上,建成了一座管柱式过山涵,(见照片一)。这座过山涵穿过一座粉质壤土、局部带有泥炭土的小山包,最大挖深为9米;净 I. Foreword Under the guidance of Chairman Mao’s revolutionary line and under the glorious shining of the party’s general line of “building a socialist society with supreme motivation and striving for a better and more economical development in a more orderly and cost-effective manner,” on the basis of studying advanced experience of fraternal units and other places, In the light of the actual situation, a column-type overhanging culvert was built in the east trunk canal of Zhufang reservoir in the winter of 1973. (See photo one). This mountain culvert through a silty loam, local peat hill with a maximum digging depth of 9 meters; net