南涧县城区河道改造工程复杂地基处理方法与应用

Method and Application of Complex Foundation Treatment for River Reconstruction Project in Nanjian County

南涧河县城段改造主要是解决原河道流向多弯曲,造成水流不畅、河道淤积突出等问题;其方法是将县城段河道向东移约300m,使河道轴线顺直、排水更顺畅、灌溉更有效,为适应县城规划需要,将现有河道回填作为城镇建设用地。通过工程实例,对处于高地下水位区域以饱和冲洪积物软弱地基土和砂卵砾石的强透水性,在施工过程中出现的各种特殊工程地质问题,结合当地可用建材、现场施工条件进行分析论证,提出合理化处理措施。

The rebuilding of Nanjianhe county section is mainly to solve the problems of multiple bends of the original river direction,resulting in poor water flow and outstanding silting of the river.The method is to move the river in the county section to the east by about 300 m,so as to make the river axis straight,drainage more smoothly and irrigation more effective.To meet the needs of county planning,the existing rivers are backfilled as urban construction land.For various special engineering geological problems occurring during construction,this paper analyses and demonstrates the available local building materials and construction conditions on site,and puts forward reasonable treatment measures.