【摘要】 长洲水利枢纽二期导流围内江,坝址属软基河床,龙口段覆盖层为含泥砂卵砾平均厚度达9 m,上游龙口采用单向从左岸向右岸立堵进占,龙口进占时龙口处河床冲刷较深。右岸预进占段裹头保护,龙口不护底,通过加大抛投强度和抛投特殊料物等措施,达到快速合龙的目的。对软基河床的截流设计与施工有借鉴价值。更多还原

【Abstract】 The inner river closure at 2nd phase construction of Changzhou Hydraulic Project boasts such conditions as soft foundation at dam site and an overburden layer with an average sediment thickness of 9m at closure gap section.The upstream closure gap is closed from the left bank to the right bank,where there is deeply scoured river bed.The pre-closed section on the right bank has a protected head and an unprotected bottom,and a fast closure is achieved by strong dumping intensity and special material dumping.Such practice serves as a reference for closure design and engineering at river bed with soft foundation.更多还原