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Wuxi Metro Line 5 Phase I Civil Construction Section 05

The foundation pit excavation at Jiankang Road Station has reached the bottom

After excavation, the retaining wall

has an intact surface, no leakage, and no deformation

and has received high praise from the owner

Project Introduction

Wuxi Metro Line 5 starts at Tangcheng Station and ends at Xinyun Road Station, with a total length of 29.3 km. Jiankang Road Station is the tenth station of the Wuxi Metro Line 5 project. Based on a comprehensive determination of factors such as the surrounding environment of the main foundation pit, the characteristics of the foundation pit, and hydrogeology, the main retaining structure adopts a scheme of 800 mm thick diaphragm walls plus internal bracing, and the foundation pit safety level is Grade I.

The retaining structure of Jiankang Road Station in Wuxi Metro Line 5 Phase I Civil Construction Section 05 adopts 0.8 m thick diaphragm walls, with a volume of 8752 m³, totaling 70 panels, using lock pipe joints.

Team Introduction

The Gu Mingjun project team has a total of 11 people and has participated in major projects such as the "Shanghai-Nantong Railway Section I Diaphragm Wall Project", "Jianning West Road Section A2 Diaphragm Wall Project", and "Taopu Wastewater Treatment Plant Initial Rainwater Storage Project Section TP1.4 Diaphragm Wall Project".

So how did we accomplish it?

Let's take a look~

01

· Slurry Testing ·

After hole cleaning of the trenching slurry, the slurry specific gravity is 1.03-1.1 g/m³, the sand content is less than 4%, and all trenching slurry indicators fully meet the standards.

02

· Rebar Cage Welding ·

The rebar cage is fabricated using gas shielded welding technology, with a welding length of not less than 5d. The weld spots are full, and the welders and inspectors sign for confirmation after completion to ensure responsibility is assigned to each person. The elevation error of all couplers is less than 1 cm.

The acoustic transmission method is used to test the quality of the wall structure, and the survival rate of acoustic pipes in all trench panels is as high as 100%.

03

· Trenching Quality ·

The SG50A trenching machine is selected for diaphragm wall construction, and the average trenching rate can reach 6.8 m/h.

During the trenching process of the panels, the trenching strategy of "trenching as it goes, measuring as it goes, and correcting as it goes" is adopted, and the verticality of all panels reaches the design requirement of 1/300.

04

· Concrete Pouring ·

The concrete used is grade underwater C35, with an impermeability grade of P6. The slump is controlled between 200±20 mm, and the slump and spread are measured once every 50 m³ to strengthen slump testing during concrete pouring.

Accumulating practical experience

Creating quality projects

We always stay true to our original aspiration

and are determined to make every project a premium model

The gentle evening breeze will surely blow away much unhappiness