The NSGZQ-3 standard of Nansha Port Railway is the main control project, and it is also the largest bridge project in the middle of the whole line. The main bridge adopts steel box mixed double main beam and other high-rise tower cable-stayed bridge. The main bridge is 1118.7 meters in length. Bridge No. 156# and 157# are the main piers of cable-stayed bridges. Because the main pier is a super-large and deep-drilled pile and the geology is extremely complicated, the hardness of the bedrock is as high as 70 MPa. In addition, the construction quality requirements are high and the construction period is short. Therefore, the construction method of the main bridge pier pile foundation drilling The selection of the subcontracting team was extremely cautious. According to the engineering geological report provided by the general contractor and the pile foundation design drawings, the XCMG XR550D rotary drilling rig was finally selected, and a detailed construction plan was obtained in the shortest time. Characteristics 01. Configure five-section machine-locked drill pipe with a maximum diameter of 3.5m and a maximum drilling depth of over 100m. It can adapt to most hard rock deep piles in China. 02. It adopts H-type hydraulic telescopic crawler chassis for rotary drilling rig, which is fully developed independently. It is equipped with large-diameter slewing bearing to ensure superior stability and convenient transportation. The chassis has swinging legs to assist in disassembly. 03, 132m full single-row rope main hoisting technology, to ensure the main hoisting 60 tons of lifting force, while effectively solving the problem of wire rope biting rope, grinding rope, greatly extending the service life of wire rope 04. The power head has the common mode and the rock entering mode, which respectively works on the soil layer and the rock stratum, improves the construction efficiency, and the power head has the automatic rotation function. The rotation speed is continuously adjustable in the rock entering mode, which is suitable for hard stratum construction. Xugong XR550D used to have a trouble-free working time of more than 400 hours on the Hanjiang Bridge, and completed a pile construction through grading drilling, creating a value of nearly one million yuan for users. This time, we will undertake the construction tasks of two main piers of 156# and 157# and several kilometers of railway bored piles. After the groundbreaking ceremony, the drilling of the two main piers on both sides of the Xijiang River officially began. The XCMG XR550D will definitely perform another wonderful event. Here, I wish the project a complete success! Style 60 Chiksan Swivel Joints' specifications are 2" to 4",rated working pressure of 42~105MPa(6000psi~15000psi),can provide various types of activities bent at room temperature,low sulfur gases and conditions of use head and kits.Swivel joints have long radius elbows and short radius fo two types,long bend radius activities have a smooth path,the liquid can be minimized through the resisitance of the fluid on zhe corner of the wall thickness of resisitance to erosion corrosion better than short radius,but sometimes due to the lower limit or pressure field installation space is also used short radius. Style 60 F*M,60 CHIKSAN LONGSWEEP SWIVEL JOINT AISI4715,60 High Pressure Swivel Joint 2in.,Long Radius Swivel Joint AISI4715 Xi'an Qinsen Technology Co.,Ltd . , https://www.xianqinsen.com
The grand opening ceremony of the main bridge pier foundation project of the Nansha Port of Guangzhou Nansha Port Railway was held. Three XCMG XR550D rotary drilling rigs were very eye-catching at the groundbreaking ceremony.