The “super drill” drilled out the acceleration of the Yanji Yangtze River Bridge.Turkey Excavator sprocket
Accelerate the construction of a comprehensive transportation system. Integrate into the national comprehensive three-dimensional transportation backbone network, promote the upgrading of the “one main and two wings” transportation structure from the “Y” type to the “△” type, and accelerate the construction of a modern era with four directions of east-west, north-south, four-stream integration, and four-way interconnection of iron, water, public and air. Integrated transportation system.Turkey Excavator sprocket
——Summary of the report of the 12th Provincial Party Congress
At 10:30 on July 14th, the scorching sun was like fire. The construction site of Yanji Yangtze River Bridge, a key project of our province, was rumbling along the Yangtze River in Songshan Village, Yanji Town, Ezhou City.
On the construction site of the main tower on the south bank of about 1,000 square meters, four drilling rigs made a rumbling sound. The thick drill bit circled and probed down, with a diameter of 3.2 meters. The loud noise made the feet tremble slightly, and the excavated mud was pumped into the mud pool for sedimentation. .
“With it, it is guaranteed to complete the construction of 56 pile foundations before the high water level of the Yangtze River.” Pointing to one of the 40-meter-high green “Big Macs”, the sweaty project manager of CCCC Second Aviation Bureau Wu Xiaobin had a smile on his dark face.
44.8 degrees Celsius! Beside this domestic top Shanhe intelligent rotary drilling rig, a reporter from Hubei Daily took a thermometer to measure the real-time temperature. However, this “super drill” is not afraid of high temperature, and it is firmly digging into the ground one meter by one. The driver, Master Zhao, is calmly operating in the cab with a height of more than 10 meters.
The main pier of the south tower of the Yanji Yangtze River Bridge adopts a group pile foundation, and the deepest point has to be drilled down to 76 meters. What is more difficult is that the pier is located at the edge of a geological fault zone, with complex distribution of rock layers and uneven rock strength. If the traditional impact drill and rotary drill are used for construction, it is difficult to complete the task on time.
Hubei CCIC Yanji Bridge Company and CCCC Second Aviation Bureau Project Department decided to invest more than 20 million yuan to introduce the most powerful rotary drilling rig in China to participate in the construction of the main pier pile foundation. It is equipped with dual power five motors. The whole machine weighs 450 tons, which is equivalent to the weight of nearly 400 cars. The maximum drilling diameter can reach 7 meters, and the maximum drilling depth can reach 170 meters, which can meet the requirements of large diameter deep holes and high hardness. Requirements for rock-socketed piles.
Where is the magic of “super drill”? Guan Aijun, general manager of Hubei Communications Yanji Bridge Company, pointed to the high cab and said that there is a visual screen on it, and various parts can be observed during construction, and the system can automatically level the data such as the verticality of the hole. It can also automatically alarm in case of danger. What’s more, it can drill a pile in an average of 5 days, which is more than 5 times faster than ordinary drilling rigs, and can “gnaw” hard bones such as basalt.
On March 24, the “Super Drill” was commissioned for the first time, and it showed great power in the construction of the Yanji Yangtze River Bridge. So far, 13 pile foundations have been completed with high quality.
With a total investment of 13.766 billion yuan, the Second E-Huang River Crossing Channel (Yanji Yangtze River Bridge and Connection) project was invested and constructed by Hubei Communications Investment Group, with a length of about 26 kilometers. Its main bridge uses a 1860-meter suspension bridge to cross the river once, and it is currently the world’s largest double-deck four-main cable suspension bridge.
“Super Drill” is just a microcosm of the Yanji Yangtze River Bridge’s century-old quality project of Ping An. In this world-class bridge construction site, the figure of “wisdom” is dancing everywhere.Turkey Excavator sprocket
Guan Aijun introduced that with the assistance of the bridge-building artifact, the main sections of the main tower pile foundation, anchor bolts, and approach bridges on both sides of the Yanji Yangtze River Bridge have been fully started, and they are striving to achieve the investment target of 3 billion yuan this year.
Bridges span the Yangtze River to build a modern comprehensive transportation system. This year, in addition to the second E-Huang River crossing (Yanji Yangtze River Bridge and its connection), which has already started, Hubei Communications Investment Group is also building 4 Yangtze River Bridges at the same time. The Jingzhou Guanyin Temple Yangtze River Bridge and the Jingzhou Libu Yangtze River Highway and Railway Bridge are both double-deck bridges; the construction of the Zhijiang Bailizhou Yangtze River Bridge will bid farewell to the history of crossing the river for thousands of years.Turkey Excavator sprocket
Expert Reviews
Qiaodu moves from “accessibility” to “innovation”
The Second E-Huang River Crossing Channel (Yanji Yangtze River Bridge) connects Huanggang and Ezhou. It is a key supporting project for the core international logistics hub with Ezhou Huahu Airport as the core. It will help Hubei’s “dual hub” strategy and improve the comprehensive transportation system. It is of great significance to give full play to the comprehensive benefits of the core logistics hub and promote the high-quality development of the integration of Wu, Hubei and Huanghua.Turkey Excavator sprocket
The main span of 1860 meters and one span across the river, the innovative four main cables, the different sag, the double-layer traffic steel truss suspension bridge scheme, all reflect the hard core strength of Wuhan as a bridge construction capital. The good news is that with the improvement of equipment, technology and concepts, Hubei Bridge Construction Corps has participated in the construction of more world-class bridges, and has continuously solved the world’s bridge construction problems such as “deep water”, “large span” and “high speed”.Turkey Excavator sprocket
The world builds bridges to see China, and China builds bridges to see Wuhan. What’s more valuable is that the Yanji Yangtze River Bridge reflects the active exploration from “accessibility and convenience” to “coordinated innovation”, which is important for promoting the development of the world’s ultra-large-span suspension bridge technology, further polishing the name card of China’s bridge construction, and realizing the strategy of building a strong country in transportation. significant.Turkey Excavator sprocket
——Peng Yuancheng, Chief Expert of CCCC Second Highway Survey and Design Research Institute Co., Ltd.
Post time: Jul-22-2022
