In the process of cable construction, the construction team of Guangxi Road Construction Group jointly studied and explored the sealing problem of cable anchorage, proposed a construction method of double sealed cable anchorage and applied for an invention patent, and a double sealed cable anchorage applied for a utility model patent and has been authorized.
The anti slide key of stay cable of Peisen Liujiang bridge is designed as a two-sided two-way cross anti slide key, which is the first application in China.
Solid Lifting Socket Cross Pin
It is a control project of Hezhou Bama Expressway (Xiangzhou Laibin section).
The technical difficulty of installation and the requirements of construction coordination are very high.
The cantilever pouring of the box girder of the main bridge on Xiangzhou bank has reached block 24, and the right span of the approach bridge has been completed; The cantilever of the main bridge on Laibin bank has been poured to block 22, and the approach bridge on Laibin bank has been fully connected, and the bridge deck pavement is under way.
The patent uses the sealing components of the sealing device assembly at the front end of the anchor to grip and seal the gaps between the anchor hole and the cable, forming multiple sealing layers.
The main bridge is a (145+280+145) meter prestressed concrete Partial Cable-stayed Bridge with double towers and single cable plane.
As an important stressed component of some cable-stayed bridges, the installation quality of stay cables directly affects the safety, quality and overall aesthetic effect of the bridge.
The total length of the bridge is 2578.9 meters.
Second, because the angle of each branch pipe cable saddle changes with height, the construction team accurately locates the coordinates of each branch pipe cable saddle by using the three-dimensional coordinate method through collaborative measurement on both sides of the bridge, and uses the rigid skeleton to fix the cable saddle, with the error controlled within ± 5mm, so as to achieve accurate positioning.
At present, the construction of Peisen Liujiang bridge is advancing rapidly.
Third, the construction team adopts the equivalent tensioning process and intelligent single quick tensioning equipment, which can automatically control the tensioning force according to the displayed change value of the stress sensor installed on the steel strand, so as to realize the uniformity of the stress of a single steel strand of the cable.
The utility model has the advantages of good sealing effect, less leakage of anti-corrosion filler in the anchorage, less external corrosive liquid entering the anchorage, and convenient installation, which improves the service life of the stay cable.
Each stay cable of Peisen Liujiang bridge consists of 55 cables Φ It is composed of 15.2mm steel strands, with the longest cable length of 284.7m and weight of 17.2t.
Peisen Liujiang bridge is invested and constructed by Guangxi new development group, an enterprise directly under Guangxi Beibu Gulf Investment Group Co., Ltd., and undertaken by Guangxi road construction group.
At present, the construction of 12 pairs of stay cables on Xiangzhou bank and 11 pairs of stay cables on Laibin Bank of Peisen Liujiang bridge has been completed, gradually “weaving” a “red giant umbrella”.
In order to ensure the smooth installation of stay cables, the construction team of Guangxi Road Construction Group adopted new technologies, new processes, improved construction methods, optimized the construction process, controlled the project quality, achieved the optimization of each process at one time, and improved the construction efficiency.
Focusing on the construction of stay cables of Peisen Liujiang bridge, the construction team of Guangxi Road Construction Group has formed a unique trick to control the construction quality of stay cables after summarizing: first, the construction team uses BIM Technology to establish a solid model of stay cable anchor tooth block for collision inspection, optimize the installation process of anchor tooth block reinforcement and cable conduit, and realize the rapid and accurate positioning of cable conduit.
The installation of stay cables is like “threading needles and wires” on the cable tower, in which the cable hanging operation is an important process of stay cable construction, which is divided into three stages: protective sleeve installation, traction threading and stay cable tensioning.
News in midsummer, the sun is scorching.
46 groups of 92 stay cables arranged on the single cable plane of the tower column are like giant “umbrellas”, making the main piers on both sides become two “giant umbrellas”.
Source: People’s daily previously read 1 project | prestressed concrete cable-stayed bridge under construction with the largest span highway Peisen Liujiang bridge first cable hanging 2 project | “Asia’s first span low pylon cable-stayed bridge” Peisen Liujiang bridge to the main pier hanging basket main body installation welcome attention 👇。.
