News Detail - JCGC Network

Milling the Hardest Rock, Tackling the Toughest Jobs | SANY Dual-Wheel Trench Cutter Holds the Leading Position in Rock Milling, Supporting Shenzhen Metro Construction

2024-04-02 973 0人评论

　　Recently, the first 9-meter-wide diaphragm wall reinforcement cage at Chanwan Central Station on Shenzhen Metro Line 15 was successfully lifted and lowered into the trench, marking the start of the main construction tasks of the civil engineering Section 10 of the Shenzhen Metro Line 15 project, in which the SANY SDC120 dual-wheel trench cutter is participating.

　　Shenzhen Metro Line 15 is Shenzhen's first "ring-shaped" metro line, known as the "Shenzhen First Ring." Once completed, it will support development in the western region and cover the north-south traffic corridor of the Nanshan Science and Technology Park. The line has a total length of 32.2 kilometers and 24 stations, including 18 interchange stations, with the entire line laid underground.

　　Chanwan Central Station is the ** station on Shenzhen Metro Line 15 to commence construction. It is a three-level underground, 13.5-meter single-column island-type station, and will interchange with the planned Line 9 via stacked island platforms. It is a composite assembled station. The station's diaphragm walls total 124 panels, including 32 panels of 9-meter width and 86 panels of 6-meter width, with a wall thickness of 1.2 meters and design depths ranging from 32 to 36 meters, with an average rock-socketed depth of 5-7 meters. The joints between panels are mainly I-beam type, and construction is carried out using a combination of grab, rotary drilling, and milling processes.

　　Because the 9-meter-wide diaphragm wall reinforcement cages are large in volume and high in risk, and the station is located in a coastal area, the surface miscellaneous fill layer contains relatively thick filled rubble. The wall bottom consists of moderately to slightly weathered mixed granite, with the natural compressive strength of the rock reaching up to over 100 MPa, and the geology is complex and uneven. Controlling trench wall stability and verticality during trenching is relatively difficult.
Image

Geological rock blocks at the project

　　To complete the diaphragm wall construction safely and efficiently, Guangdong Zhongda Construction Engineering Co., Ltd., after multiple comparative evaluations and on-site inspections, selected the SANY SDC120 dual-wheel trench cutter to enter the project for construction.

★According to on-site records, taking a 32-meter-deep trench section as an example: the SDC120 milled to 32 meters in a total time of 6.4 hours.
★From 26.1 meters to 27 meters, rock strength 50-70 MPa, average efficiency: 1.65 meters/hour;
★From 27 meters to 28.5 meters, rock strength 70-90 MPa, average efficiency: 1 meter/hour;
★From 28.5 meters to 32 meters, rock strength 90-100 MPa, average efficiency: 0.8 meters/hour.
★Basically, it can ensure completion of 1 panel per day for 9-meter trench sections and 3 panels in two days for 6-meter trench sections.
★As of March 22, 35 panels have been completed.

^ Construction hours of the dual-wheel trench cutter in March

　　It is worth mentioning that in this project's construction, the SANY SDC120 dual-wheel trench cutter, as the main equipment, firmly occupied the C position, milling the hardest rock and doing the toughest work. Its excellent milling capability and attendance rate were recognized by the owner and the client.

　　As a benchmark manufacturer in the global construction machinery field, SANY specifically addressed the needs of diaphragm wall construction in ultra-deep and ultra-hard geological layers. After years of research, testing, and optimization, it launched the SDC120 dual-wheel trench cutter in 2021. Once introduced to the market, the product received great attention and was recognized by experienced customers for its excellent performance and intelligent operation, leading sales in the same period.

　　With the promotion of the international market, SANY dual-wheel trench cutters have successfully achieved overseas sales of 2 units, and multiple inquiries are currently under negotiation. We always adhere to the purpose of high quality and high standards and continuously make technological breakthroughs.
　　In terms of the supply chain, we have ordered more than 10 engines to ensure sufficient inventory of core and key components. SANY owns the world's first certified "Lighthouse Factory" in the heavy industry. The modern, unmanned, automated, digital, and intelligent SANY Lighthouse Factory has successfully shortened the production cycle to 1 month. We have also established a rolling in-stock reserve system to meet customer needs in a timely manner.
　　SANY has invested over 100 million yuan in wall-type product research and development, adhering to the philosophy of long-termism and continuously improving product technology. Flowing water does not strive to be first, but to flow endlessly. In the future, we will continue to focus on wall-type products, develop in the direction of digitalization, electrification, and internationalization, and build the world's ** brand in piling machinery.

The world's first certified "Lighthouse Factory" in the heavy industry

SANY Global R&D Center

Inside the Lighthouse Factory

Intelligent construction
★Intelligent optimized drilling: adaptively adjusts milling wheel speed, milling wheel torque, pressurization weight, and lowering penetration speed to maximize construction efficiency.
★Intelligent power distribution: drilling power and mud pump slag discharge power can be automatically allocated to maximize effective power utilization.
★Intelligent automatic deviation correction: during drilling, each correction push plate automatically adjusts its extension amount according to the spatial position from the gyroscope for automatic deviation correction.

Stable overall structure Comfortable operation
★Box-type mast large triangle: structural design, with a solid and stable overall frame.
★Flexible design of mast cylinders: hydraulic and pneumatic buffer sections absorb the vibration energy of the working device during construction, resulting in low vibration in the cab.

High slag discharge efficiency
★Pump suction slag discharge, with air lift assistance (optional)
★Avoids the decline in slag discharge capacity of centrifugal pumps as depth increases.
★Speeds up slag discharge, improves slag discharge efficiency, and reduces pipe blockage.

High cutting efficiency
★Full-section tooth arrangement
★The swing tooth body is sturdy, with a reasonable angle and high construction efficiency.

High trench quality
★The verticality adjustment mechanism ensures the working device is vertical
★The rotation device ensures the working device does not deflect and facilitates corner construction
★8 front and rear push plates and 4 left and right push plates: they can work independently during construction to correct the frame's front-rear, left-right, rotational, and deflection deviations, ensuring high-quality trenching.
★Strong deviation correction capability: the correction cylinder bore is Φ100 mm, the correction stroke is 125 mm, and the correction thrust is large with a long distance.

Jintai Showcases 'Ultra-Deep' Technology and Product Achievements at Wuxi Deep Foundation International Exhibition

Milling the Hardest Rock, Tackling the Toughest Jobs | SANY Dual-Wheel Trench Cutter Holds the Top Spot in Rock Milling, Supporting Shenzhen Metro Construction

Milling the Hardest Rock, Tackling the Toughest Jobs | SANY Dual-Wheel Trench Cutter Holds the Leading Position in Rock Milling, Supporting Shenzhen Metro Construction

评论（0）

相关推荐

Yuchai Party Committee Conducts Research and Striver Support Visit at Changzhou Yuchai

Yuchai Equipment Technology Makes Its Debut at Germany's GaLaBau Exhibition, Accelerating Its Deepening Presence in Europe

Taixin KR60S Low-Headroom Compact Rotary Drilling Rig Rolls Off the Line, Empowering Complex Infrastructure Construction in Yunnan, Guizhou and Sichuan

518 Meters in 19 Days with Zero Downtime: Sunward SWDM520E2 Sets a Drilling "Speed Record" on the Yichang–Changde High-Speed Railway

热门排行

关于基础工程网

010-64694966

Milling the Hardest Rock, Tackling the Toughest Jobs | SANY Dual-Wheel Trench Cutter Holds the Leading Position in Rock Milling, Supporting Shenzhen Metro Construction

评论 （0）

相关推荐

Yuchai Party Committee Conducts Research and Striver Support Visit at Changzhou Yuchai

Yuchai Equipment Technology Makes Its Debut at Germany's GaLaBau Exhibition, Accelerating Its Deepening Presence in Europe

Taixin KR60S Low-Headroom Compact Rotary Drilling Rig Rolls Off the Line, Empowering Complex Infrastructure Construction in Yunnan, Guizhou and Sichuan

518 Meters in 19 Days with Zero Downtime: Sunward SWDM520E2 Sets a Drilling "Speed Record" on the Yichang–Changde High-Speed Railway

热门排行

关于基础工程网

010-64694966

评论（0）