한국어
中文Both "rich" and "green",
In the Phase IV expansion project of Pudong Airport,
On the largest deep foundation pit project in China,
How can development and environmental protection achieve a win-win situation?
SEMW DMP-I digital micro-disturbance mixing pile driver,
Continue to exert strength and perform amazingly,
A satisfactory "answer sheet" was handed over.
The largest deep foundation pit project in China
The total area of the foundation pit of the Phase IV expansion project of Pudong International Airport is about 340,000 m³, the general excavation depth is about 18.6-30.7 m, and the maximum excavation depth is about 36.7 m. It is currently the largest deep foundation pit project in China.
In the foundation pit project, a series of green, energy-saving and environmentally friendly new technologies such as underground diaphragm wall combined with ultra-deep and equal-thickness cement-soil mixing wall construction method suspended partition combination support, ultra-high pressure jet grouting, and DMP construction method are comprehensively adopted.
Before the excavation of the foundation pit in the rail transit area of the proposed site, the shallow part of the site needs to be unloaded and sloped. The width of the unloading platform in the site is about 10m. DMP (micro-disturbance four-axis cement mixing pile) process, the total construction area of the mixing pile is about 24500㎡, the pile diameter is 850@650mm, the pile depth is 29.5m, the cement content is 13%, after the micro-disturbance mixing pile is piled, it will be placed in the pile Insert H700×300mm section steel, the length of section steel is 15m, a total of 1410 pieces.
The project requires that the mixing pile has little disturbance to the surrounding soil, the verticality is not greater than 1/250, the wall position deviation is not greater than 50mm, the wall thickness deviation is not greater than 20mm, and the wall depth and wall thickness must not have negative deviations.
Due to the narrow site and complex stratum working conditions are major difficulties of the project, the project leader said:
Due to the narrow site and tight construction schedule, there are many cross-constructions and the ground conditions are complex. On both sides are rainwater pipes, sewage pipes and gas pipes, all of which need to be protected, which puts forward extremely high requirements for construction technology and equipment performance.
SEMW DMP-I digital micro-disturbance mixing pile machine relies on intelligent digital construction technology, less disturbance to the surrounding environment, and high-quality piles. Construction efficiency, effectively guarantee the construction progress of the project.
"Its performance has far exceeded our expectations. Not only is the construction disturbance small, but the operation performance is also very good, stable and efficient! So far, the failure rate is very low, which is very worry-free!" The on-site construction staff praised.
DMP-I digital micro-disturbance mixing pile driver can effectively reduce the disturbance to the surrounding soil by controlling the air pressure and spraying pressure, and is equipped with special-shaped drill pipes and differential speed blades; the drill pipe is equipped with an in-ground pressure sensor And the verticality sensor, the internal pressure and verticality can be monitored in real time during the construction process, and the pile quality is higher.
DMP-I digital micro-disturbance mixing pile driver has an intelligent digital construction control system, which makes the quality of the construction process controllable, and also greatly improves the convenience of construction.
The content collected and displayed by the digital construction control system includes parameters such as grouting pressure, slurry flow rate, jet pressure, ground pressure, pile forming depth, pile forming speed, and pile forming verticality; it can generate pile length, construction time, ground pressure, The construction record table of cement consumption, pile verticality and other parameters; at the same time, the construction parameters can be uploaded to the centralized control center to realize real-time monitoring of the construction process.
The fourth-phase expansion project of Pudong International Airport is an important traffic guarantee facility to ensure the future development of Pudong International Airport. After the project is completed, it will comprehensively increase the capacity of Pudong International Airport and provide basic guarantee for the construction of a world-class international aviation hub. DMP-I digital micro-disturbance The pile mixer showed its strength in this key project in the "14th Five-Year Plan", accelerating the first-line infrastructure construction in Pudong New Area, and SEMW handed in full marks this time.
SEMW is committed to the development and construction of underground space construction and related construction technology research, and is committed to providing customers with overall solutions for underground foundations, helping the construction of national urban infrastructure, always adhering to the concept of "professional services, creating value" Customers develop together. SEMW will, as always, use its deep accumulation in the field of pile machinery to fully meet the construction needs of customers, provide professional services for customers, and create value.
Post time: Aug-02-2023