云南麻栗坝城子渡槽结构设计与基础处理研究

Study on structural design and foundation treatment of Chengzi aqueduct in Maliba area

云南麻栗坝城子渡槽虽然设计过流量小,但槽身长,工程地质条件复杂,易产生不均匀沉降问题。结合城子渡槽的工程地质条件和建筑物特点,对槽身的结构型式及渡槽的断面型式进行了比选,在此基础上提出了渡槽结构与基础处理设计方案。桩基试验与工程实践表明,城子渡槽采用的梁式U型结构型式、钻孔钢筋混凝土灌注桩基础方案以及跨河段采用的三连拱结构、重力墩基础方案合理可靠。

The design of Chengzi aqueduct is characterized as small flow and long aqueduct body and the problem of uneven settlement exists due to the complex engineering- geologic conditions. In combination with the engineering- geologic conditions and features of the structure,structural form of the aqueduct body and cross section forms were compared and selected,and the design of aqueduct structure and foundation treatment were studied on this basis. The pile foundation tests and engineering practice indicate that it is reasonable,feasible,safe and reliable to adopting the U- shaped beam structure and reinforced concrete with filling pile foundation for the aqueduct,and 3- arched structure and gravity pier foundation scheme for the cross- river section.