Recently, constructed by China Construction Eighth Engineering Division

Chongqing Youyong Expressway Shengji Connecting Road Relocation Project

supporting infrastructure project completed

This project adjacent to"The Peach Blossom Spring"in

the "Peach Blossom Spring" small village project

will accelerate the opening of a new chapter in western rural revitalization

Project rendering

The project is located in Huatian Township, Youyang County, Chongqing

covering an area of about 50,000 square meters

mainly including road works, the Shenxi River tributary works

rural housing quality improvement works, infrastructure works

rural centralized residential settlements and other five construction contents

mainly constructing one convenience service center

one fire and police service center, one convenience vegetable market

one 0.723-kilometer-long, 8-meter-wide town ring road

one Shenxi River tributary treatment project

quality improvement works for 33 rural houses, courtyard renovation for 100 households

quality improvement works for 80 resettlement houses and supporting pipe networks and other facilities

In 2021, Youyang County was listed as

one of 160 national key counties for rural revitalization assistance

Centering on the "rural revitalization" industrial positioning

upholding the goal of "better serving the people"

improving and perfecting the basic living facilities of local residents

Actual scene of project sub-items

The project is only 11 kilometers from the "Peach Blossom Spring in the book"

and will attract more tourists to Youyang

to behold the scenery described in Tao Yuanming's "The Peach Blossom Spring"

helping Youyang achieve the goal of building a comprehensive transportation hub with "internal connectivity and external links"

creating income growth for rural residents

realizing the deep integrated development of transportation infrastructure, modern agriculture

and cultural tourism

The project has a large volume of earthwork and features high slopes and steep slopes

blasting and support have become the core and difficult points of construction

The project combinedsmooth blasting, pre-splitting blasting

deep-hole bench blasting and other blasting methods

optimized the burden direction and charge weight

adopted measures such as segmented millisecond delay initiation technology

reduced hazards such as vibration, shock waves and flyrock

and ensured the stability of surrounding buildings and slopes

Construction of high slopes and steep slopes in the project

The project adopted the support design concept of "dynamic adaptation and multi-type coordination"

through detailed geological survey data analysis and slope stability calculations

combined and applied multiple support forms according to local conditions

each support structure formed a spatial force system through deformation coordination design

which not only fully leveraged the technical advantages of different support types

but also achieved overall coordination through stress transfer and load redistribution mechanisms

successfully building a slope stability defense line of "three-dimensional protection and multiple guarantees"

Actual scene after high slope construction of the project

Regarding the issue of concrete spraying

the project selected admixtures such as rebound inhibitors and tackifiers

reducing the rebound rate from 35% to below 12%

adopted various large mechanical equipment and tooling

high-arm drilling rigs for high and steep slope support

mechanical hole formation for rectangular piles

achieving the dual goals of efficiency improvement and risk pre-control

Through tackling high slope and steep slope construction

the project developed one provincial-level construction method

two utility model patents and one invention patent

The project has complex construction contents, high difficulty in high slope construction

and high safety management requirements

The project ensured stable production operation with "new technology + strong control"

actively applied new technologies; in response to the difficulty that high slope monitoring

and inspection are limited by weather and terrain

appliedGNSSmonitoring system for real-time monitoring and early warning of slope deformation

shifting geological disaster prevention and control from "passive emergency rescue" to "active early warning"

In response to problems such as the large number of rectangular pile sheet-pile retaining walls in the project

high construction risk coefficient and complex processes

the project combined the characteristics of rotary drilling rigs and rectangular pile hole formation

innovatively developed a rectangular pile hole-forming drill bit

greatly reducing safety risks and improving construction efficiency

Strictly grasping and implementing "strong control"

building a four-level prevention and control mechanism of "planning-implementation-supervision-acceptance"

For earthwork blasting engineering

manual excavated pile engineering, high and large formwork support systems

the 63-meter ultra-high slope support project and other four key risk areas

implemented a three-level side-station system of "project manager + safety director + work team"

achieving 100% full-process tracking and supervision of key processes

successfully achieving the "double zero" safety management goal

setting a safety management benchmark for mountain expressway supporting projects

In the future, the project will accelerate the completion of Youyang's new urbanization

and a strategic pivot for rural revitalization

accelerate the high-quality development of the county economy

realize urban-rural integrated development and consolidate the foundation for rural revitalization

China Construction Eighth Engineering Division will continue to demonstrate the responsibility of a central enterprise

consolidate and expand the achievements of poverty alleviation and rural revitalization

the path of people's livelihood with effective connection

and contribute to the high-quality economic and social development of Chongqing