The long protection tube was drilled into 25m, 46m, 56m, 72m. Following the Changsha-Ganxi Passenger Dedicated Line Baixicun Bridge, Changsha Wangcheng Waste Treatment Thermal Power Plant, Guangxi Yulin Nanyu Line and other projects, Chongqing Taide Construction Engineering Co., Ltd. once again joined forces with Jintai SH46A The rotary drilling rig will break through its own construction record of the full protective barrel and reach a depth of "100m +".

Hangzhou-Wenzhou Railway Project‍‍

According to the content learned from the project department of the construction party, Jintai SH46A has recently completed multiple deep piles with 46m long protection tubes and 86m hole depth in the bridge work area of Hangzhou-Wenzhou Railway Project, Fengchuan Town, Tonglu County, Hangzhou City. The manager said that in the next step, there will be "100m +" full-protected tube deep piles waiting for the SH46A rotary drilling rig to complete.

The construction process flow chart of the rotary digging type full protective tube cast-in-place pile

Pier 64 of the Bridge Work Area of Hangzhou-Wenzhou Railway Project is located in Tonglu County, Hangzhou City, and it crosses Dayuan River, Hangzhou-Huangzhou Railway, Changshen Expressway, Fengchuan Avenue, and Fengchuan toll gates. The line has a long construction period, high technical standards, high safety control risks, strict requirements for environmental protection and water conservation, and complex stratum structure. The stratum structure is mainly composed of clay, pebble soil, limestone dissolution zone, karst caves, and weakly weathered limestone, and there are easy collapse holes in oblique rock underground.

How to solve this complicated construction condition, Chongqing Tide has experience.

Changsha MSW Power Plant Phase II

Since Chongqing Tide purchased Jintai SH46A in 2018, it has done a lot of tough battles, large and small, in 4 years. The rich construction experience and skilled skills enable them to calmly deal with complex working conditions, whether it is "string caves" under extreme conditions. , Guangxi Yulin Nanyu Line with 56m long protection tube and 97m hole depth is still the first in many projects such as the Changgan Passenger Dedicated Line Baixicun Bridge with 72m long protection tube and 100.87m hole depth under extreme conditions. Qi Juechen, leading the way.

Chongqing Zengjiayan Bridge Tunnel Project‍

Take this project as an example. "Light pressure and slow rotation" is also the key to winning in the stratum that is extremely prone to collapse. As the saying goes, a good horse with a good saddle and a good boat with a good sail are due to the SH46A's precise hydraulic control technology, low-center-of-gravity mechanized layout, large multi-stage pressurized rock entry capability, and rich experience with the construction party. Only with the blessing of construction experience can the project run smoothly and complete the design requirements of the design unit.

Guangxi Yulin Nanyu Line‍

In the future, "100m +" ultra-deep fully protected tube hard piles will appear in the 64# pier and abutment of the bridge work area of the Hangzhou-Wenzhou railway project.Editor/Baohongying