Changyi expansion project officially started! The first pile foundation drilling of Xinhe Bridge

On August 26th, the trial bored cast-in-place pile of Xinhe Bridge in Changsha-Yiyang Expressway Expansion Project (referred to as "Changyi Expansion Project") officially started construction. This is the first pile foundation that Changyi expansion project took the lead in drilling, which started the "first shot" of the whole line of civil construction, marking the official start of Changyi expansion project construction.

Strict requirements to build a demonstration of quality projects

Keywords: the first engineering template leads to the manufacture of steel bar roller welding machine

The 1 15- 1# test bored pile drilled this time has a design diameter of 1.8m and a pile length of 45m.. In order to ensure the high-quality construction of the first project, Changyi Development Company attached great importance to it, and organized many special meetings of Yiyang Working Group, Engineering Safety Department, Central Laboratory, No.2 Supervision Office, Liuhe Tongduan and other participating units. According to the detailed rules for the implementation of the "first project template leading system" of Changyi expansion project, the key and difficult procedures of pile foundation are reasonably arranged, scientifically organized, detailed construction scheme is formulated, and various technical indexes are repeatedly tested. Concrete terraces were built around the mud pit, which effectively prevented rainwater and sundries from rolling into the mud pit and changing the mud ratio, and made great efforts for the high-quality construction of the first pile.

In order to ensure the smooth construction of the first pile foundation, the project department of Bid Section 6 has strictly controlled the burying of liners, mud treatment, drilling by drilling machine, etc. Through the strict control of raw materials such as cement and steel bars in the early stage and the introduction of advanced equipment such as steel bar roller welding machine, the "rear area" directly related to the construction quality of pile foundation is deployed and closely monitored in advance, which lays a solid foundation for the high-quality implementation of subsequent reinforcement cage installation, conduit watertight test, concrete pouring and other processes.

Carry out the concept of green highway in the whole process

Keywords: "process green", the strictest farmland protection system

Xinhe Bridge is the control project of the sixth bid section of Changyi expansion project. Located in Quanjiaohe Town, Heshan District, Yiyang City, it has crossed Xinhe and Quanjiaohe successively. River terraces are mostly farmland, ponds and villages. The total length of the bridge is 3466.8 meters, with 5 * * pile foundations10. Replacing roads with bridges avoids basic farmland to the maximum extent, effectively implements the strictest farmland protection system, and fully embodies the concept of green highway resource intensive.

Before pile foundation construction, Changyi Development Company repeatedly emphasized environmental protection and water and soil protection during construction. During the construction, the supervision office and the construction unit set up a mud recovery and purification system in strict accordance with the requirements of the Detailed Rules for the Establishment of Pile Foundation Green Highway and Quality Project of Changyi Extension Project to reduce pollution and save materials. At the same time, by setting a good drainage system around the mud pit, the influence of pile foundation construction on the surrounding environment is effectively reduced, and the "green process" of project construction is ensured.

Attach importance to education and escort the construction of "Safe Expressway"

Keywords: on-site technical safety disclosure of pre-shift safety education

In order to ensure the safe construction of the first pile foundation, before the construction, Changyi Development Co., Ltd. combined with the activities of "ensuring safety, ensuring smooth flow and excellent service tree image" and the action requirements of "clearing hidden dangers" of the Provincial Department of Transportation, required the construction unit to conduct repeated investigations on key hazard sources, and actively strengthened the safety training for front-line construction personnel to escort the construction of "Safe Expressway" with solid safety education.

Before the pile foundation construction, the Second Supervision Office and Liuhe Section repeatedly emphasized the safety points in the pile foundation construction process through on-site technical disclosure and safety disclosure for each construction worker and pre-construction safety education, which effectively strengthened the safety awareness of construction workers. At the same time, a series of eye-catching safety signs and signs were scientifically set on the construction site, which effectively protected the construction site and effectively promoted the scientific, orderly, safe and high-quality start of Changyi expansion project.

Changyi Expressway Expansion Project

The extension project of Changyi Expressway passes through Wangcheng District of Changsha City, Ningxiang City and Heshan District of Yiyang City. The total length of the route is 50.284 kilometers, and the standard of two-way six-lane expressway is adopted. The design speed is1.20km/,the subgrade width is 33.5m, the total budget of the project is 7.797 billion yuan, and the construction period is three years.

There are 8 interchanges, including Guanyinyan, Huangqiao, Wushan, Jinzhou North, Ningxiang North, Hu Ning, Bijiashan and Sujiaba, 5 toll stations and 1 service area. After the completion of the project, the entrance and exit of the "West Gate" in the main city of Changsha will be increased, which will greatly alleviate the traffic pressure of the existing Changyi Expressway.