五十年代初,国外对软基河床截流一般多采用浮桥或栈桥平堵方法,其最大优点是减少合拢过程中复盖层的冲失。由于平堵截流一般都需架桥,所需附属设备较多,且造价高。随着大型自卸汽车的发展,五十年代后期,世界上大型水利枢纽工 In the early 1950s, the use of pontoon or trestle blocking method for closure of soft-bed riverbed abroad was generally adopted abroad. Its biggest advantage was to reduce the loss of cover during closing. As a result of the closure of the closure are generally required bridging, the required ancillary equipment more, and high cost. With the development of large-scale dump trucks, in the late 1950s, the world’s large-scale hydraulic joint works