大型耙吸船在黏性土质条件下的施工  

Construction of mega TSHD in cohesive soil

作　　者：何新伟 杜志轩 HE Xin-wei;DU Zhi-xuan(CCCC Guangzhou Dredging Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交广州航道局有限公司,广东广州510290

出　　处：《水运工程》2020年第6期199-203,共5页Port & Waterway Engineering

摘　　要：大型耙吸船在黏性土质条件下施工易出现耙头堵塞以及泥舱疏浚土板结、固化等问题,针对这一现象,研究施工设备改造及施工工艺优化。通过引入具备水下泵等先进设备的超大型耙吸船"浚洋1"、强化高压冲水设备、改造耙头等来降低耙头堵塞影响。采用"泥沙垫舱+黏土装舱"的施工工艺,以淤泥及少量沙土作为疏浚黏土与泥舱间的润滑剂,减少黏土在船舶泥舱的滞留,缩短船舶抛泥时间,提高船舶施工效率。In the construction using mega TSHD(trailing suction hopper dredger)in cohesive soil,the TSHD is prone to clogging of the drag head and solidification of the muddy soil in the hopper.In view of this phenomenon,we study the reconstruction of construction equipment and the optimization of construction technology.By introducing the mega TSHD‘Junyang 1’with advanced equipment such as submerged dredge pump,strengthening high-pressure jet and reforming the drag head,the influence of drag head blockage can be reduced.The construction technology of"mud sand cushion hoper+cohesive soil loading"is adopted.The mud and a small amount of sand are used as the lubricant between dredging clay and mud hopper to reduce the retention of cohesive soil in the mud hopper of the ship.Thus the time of throwing mud can be shortened and the construction efficiency of the ship can be improved.

关 键 词：耙吸船 黏性土质 水下泵 高压冲水 耙头改造 

分 类 号：U616[交通运输工程—船舶及航道工程]