No. 2 Engineering Co. of Cccc First Harbor Engineering Co., Ltd.

Shanghai Zhenhua Heavy Industries Company Limited

Cccc First Harbor Engineering Co., Ltd.

No.2 Engineering Company Ltd. of Cccc First Harbor Engineering Company Ltd

Zhenjie Tao

Wei Xu

Jianjun Zhang

Ling Zhu

Ming Lin

Yiyong Li

Bin Xie

Naishou Zhang

Bo Meng

Chuang Du

Hong Xiang

Xuejun Wang

Chao Zhang

Zengjun Li

Jinbao Liu

Xiangwei Zhang

Xiangrong Zhou

Mingxiang Wang

Hongbo Wei

Chunfeng Zhu

Ziyang Bi

Gang Yin

Jiangwei Song

Linlin Yuan

Yipin Cheng

Faqiang Su

Yongshuai Zhu

Bo Yu

Dejin Liu

Zhanwei Han

Xuhong Suo

The present application relates to an installation method for a closure joint of an immersed tunnel, and belongs to the technical field of closure joints; the installation method comprises the steps: establishing a first coordinate system; distributing feature points; installing the Ntube coupling; installing an Ntube coupling and pushing out a push-out segment; wherein, the first coordinate system is established at a tail end of an Ntube coupling, breakthrough points NS and NW are distributed at a head end and a tail end of a Ntube coupling respectively, breakthrough points DS and DW are distributed at a push-out segment, and breakthrough points NS and NW are distributed at a head end and a tail end of a Ntube coupling respectively; and coordinates of the breakthrough points DS, DW, NS, NW, NS, NW in the first coordinate system are calculated respectively; the installation method can improve the installation accuracy of the closure joint and is easy to operate.

Installation method for closure joint of immersed tunnel

The present application discloses a dredging system for a pre-paved gravel foundation bed surface in open sea deep water, including a dredging mechanism, which includes a dredging suction head, a power component and a dredging pipeline, wherein the dredging suction head is connected with the dredging pipeline; the dredging pipeline is communicated with the power component; the dredging suction head includes at least one ridge surface suction port and at least one furrow suction port; the openings of all the furrow suction ports are lower than those of all the ridge surface suction ports; a lifting mechanism, which is connected with the dredging suction head and is used for lifting the dredging suction head to the gravel foundation bed surface; a moving mechanism, which is connected with the lifting mechanism and is used for driving the dredging suction head to move within a dredging range of the gravel foundation bed surface. By the adoption of the dredging system for the pre-paved gravel foundation bed surface in the open sea deep water of the present application, the dredging suction head includes the ridge surface suction ports and the furrow suction ports, and may suck mud on the top surfaces of gravel ridges and the mud in furrows between two gravel ridges at the same time, thereby guaranteeing the dredging quality of the gravel foundation bed surface and improving the working efficiency. The dredging system is simple in structure, convenient to use and good in dredging effect.

Dredging system and dredger for pre-paved gravel foundation bed surface in open sea deepwater

Growing community of inventors

Beijing, China

Zhenjie Tao