顶管无中继间长距离下穿河塘施工技术研究OA

When pipe jacking is carried out over long distances,relay rooms are usually installed to ensure smooth jacking.The installation of relay rooms will increase the construction cost,increase the construction process,and extend the construction period.In this regard,based on the water diversion project from Jinan Yuqing Lake Reservoir to Quehua Water Plant,the study carried out research on the construction technology of long-distance pipe jacking without relays to penetrate the river pond,and successfully realized 700m long-distance jacking without relays.The study came to the following conclusion:Jacking without relays requires the working shaft to provide greater jacking force.The integral connection of double purlins and thickening of the bottom plate can improve the integrity of the working shaft;it can be used when digging into mixed stone strata.The rock slag shape was geologically determined,and mud pipes and intermittent jacking were optimized to reduce risks such as pipe blockage.The study used numerical simulation to provide jacking parameters for long-distance cross-river ponds,ensuring the smooth progress of the construction.The research results have good reference significance for the construction of pipe jacking under long-distance rivers and ponds.