Construction equipment: With three XCMG XR550D rotary drilling rigs and two Xugong 150T crawler cranes, the construction party Wuhan Lecheng Construction Engineering Co., Ltd. contracted the main section of the project. Wuhan Lecheng is a large-scale foundation construction enterprise in Hubei Province. There are more than 50 large and medium-sized mechanical equipment. Xugong XR550D has a maximum construction torque of 550KN.m. It has 132m single-row rope main winch technology. It adopts self-developed special H-type hydraulic telescopic crawler chassis and is equipped with large-diameter slewing ring to ensure superior stability and transportation. Portability. Geological conditions: The geological conditions of the project area are complex. According to the geological survey data, the maximum depth of seawater is about 21m, which is mainly composed of silt, sand pebble and rock stratum. The rock stratum strength is 80~160MPa, and the rock inlay depth is 26m. Difficulty in construction: Due to offshore operations, it is completely isolated from the land, and the wind speed at sea can reach 40m/s. It brings a lot of inconvenience to equipment lifting, installation, disassembly and construction. In the construction process, it has a hole depth of 85m. The diameter of 3m, into the 28m granite, makes the pile foundation construction very difficult. Construction highlights: XCMG XR550D power head has common mode and rock entry mode, which are designed for soil and rock formation respectively, and has automatic rotation function, which can be continuously adjusted during construction. In the deep middle channel construction process, the new construction method of rotary drilling rig is used to replace the traditional impact drilling machine construction. The rock layers are crushed by 1.5m, 2.0m, 2.5m, 3m core drill, roller drill and barrel drill respectively. The core, the circular cutting and the layered construction ensure the engineering quality of the pile foundation and greatly improve the working efficiency. XCMG XR550D has been successfully developed in 2015 and sold to all over the world. It has participated in the construction of major projects such as the Nansha Port Railway Xijiang Bridge, Wuhan Qingshan Bridge and Jiangmen Bridge, especially in the construction of the Kangshao Bridge of Hangshaotai Railway. The construction record of the ultra-deep pile of the rotary drilling rig was refreshed to 143 meters, demonstrating the "depth" of the big country heavyweight! . Xugong XR550D refreshed the construction record of ultra-deep piles of domestic rotary drilling rigs to 143 meters in the construction project of Jiaojiang Bridge of Hangshaotai Railway Xugong XR550D Construction in Qingshan Bridge in Wuhan 5 Xugong XR550D construction in Jiangmen Bridge Mcr Series Radial Motor,Hydraulic Vane Motor,Poclain Hydraulic Motor,Hydraulic Motor Torque Ningbo delambo hydraulic power Co.,LTD , https://www.sun-seiko-hyd.com
Project Description: The Shenzhong Passage is a cross-sea bridge connecting Shenzhen and Zhongshan in Guangdong Province with a total length of 24 kilometers. Among them, the immersed tunnel is 6.8 kilometers long and has 8 lanes in both directions. It is the longest submarine immersed tunnel in the world. After the deep middle passage is completed, it will become an important passage connecting the east and west banks of the Pearl River.
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