Low-carbon multifunctional complete equipment and process for efficient removal of ultra-deep obstacle piles
Green and efficient removal of ultra-deep obstacle piles solves the problem of urban obstacle clearance.
Type
Tags
Solution maturity
Mass promotion / Mass production
Applicable industry
Applications
Key innovations
The innovation of this project is reflected in the principle of "separation of piles and soil and removal of entire piles", and the development of a series of equipment such as intelligent search, high-pressure aerosol, and adaptive cutting, realizing low-carbon operations of electric driving instead of diesel.
Potential economic benefits
The new output value was 785.78 million yuan, the profit was 65.47 million yuan, and the tax revenue was 10.98 million yuan. Construction efficiency has been more than tripled, significantly reducing energy consumption and environmental costs.
Potential climate benefits
Electric drive replaces diesel, directly reducing fossil fuel carbon emissions; efficient operations significantly reduce energy consumption and reduce resource waste and environmental disturbance.
Solution supplier
View more
Shanghai City Urban Construction Design Research
Shanghai City Urban Construction Design and Research Institute is deeply involved in urban planning, municipal engineering and architectural design to provide comprehensive solutions for sustainable urban development.
Shanghai，China
Solution details
This project belongs to comprehensive underground engineering technology in other technical fields.
In recent years, with the rapid development of urban construction, construction projects such as municipal bridges, rail transit, river-crossing tunnels and old city reconstruction have had problems in clearing a large number of underground obstacle piles. Since 2006, my country has pulled out more than 25,000 piles every year. Shallow obstacle piles can be completely removed through conventional excavation, chiseling, etc., but deep obstacle piles face factors such as thorough removal, energy consumption efficiency, and environmental protection, which pose huge challenges to construction equipment and processes.
This project systematically studied the key technologies for efficient removal of ultra-deep obstacle piles, proposed the disposal principle of "pile-soil separation and removal of the entire pile" for the first time, developed a complete set of construction equipment, and formed a series of efficient and green construction techniques and design evaluation methods. The main innovations are as follows:
In recent years, with the rapid development of urban construction, construction projects such as municipal bridges, rail transit, river-crossing tunnels and old city reconstruction have had problems in clearing a large number of underground obstacle piles. Since 2006, my country has pulled out more than 25,000 piles every year. Shallow obstacle piles can be completely removed through conventional excavation, chiseling, etc., but deep obstacle piles face factors such as thorough removal, energy consumption efficiency, and environmental protection, which pose huge challenges to construction equipment and processes.
This project systematically studied the key technologies for efficient removal of ultra-deep obstacle piles, proposed the disposal principle of "pile-soil separation and removal of the entire pile" for the first time, developed a complete set of construction equipment, and formed a series of efficient and green construction techniques and design evaluation methods. The main innovations are as follows:
- In view of the problems of poor thoroughness of obstacle pile removal equipment, large environmental impact, small application depth, high energy consumption, and low efficiency, a series of equipment such as an intelligent pile bottom search device, a high-pressure mist rapid ejector, and an adaptive cutting and drilling have been developed. A series of equipment such as large diameter steel sleeves, crawler boom and external equipment connection devices are used to drive low-carbon operations instead of diesel, forming a set of efficient removal equipment for ultra-deep obstacle piles with independent intellectual property rights. It breaks through the limitations of traditional equipment and processes, and provides equipment guarantee for the removal of obstacle piles exceeding 60 meters deep.
- In response to the problem of removing obstacle piles with a depth of more than 30 meters, combined with independently developed new construction equipment, technologies such as double casing combination sinking, internal high-pressure aerosol drag reduction, and full-process real-time intelligent monitoring have been systematically developed to form an overall removal of ultra-deep obstacle piles. The complete set of construction method system overcomes the shortcomings of traditional techniques of limited obstacle clearance depth, large environmental impact, and long construction period, and is the first to realize the overall removal of bored piles with a diameter of 1200mm and a depth of 65m in construction projects. During the construction period, the deformation of the surrounding soil was reduced from centimeter level to millimeter level, which increased the efficiency by more than three times compared with traditional processes.
- In response to the engineering problems of large-diameter river-crossing shield tunnels crossing the river through large inclined piles, a series of equipment such as pile pulling guide rods and spherical universal wheel combination devices have been developed, which expand the functions and scope of application of construction equipment and form A new construction method for deep inclined piles in complex geologically sensitive environments has filled a gap in the industry and achieved the complete removal of pile foundations with a maximum inclination angle of 30 degrees and a pile length of 38 meters.
- A pile pulling construction analysis model based on CEL (Coupled Euler-Lagrange Finite Element) was established. Combined with engineering application and field tests, the environmental impact mechanism of the new obstacle removal equipment and process construction process was revealed, and the surrounding soil was proposed. A simplified prediction method for stress deformation has formed an evaluation and design system for comprehensive treatment and utilization of existing pile foundations.
The research results of this project have applied for 15 patents (9 invention patents), authorized 8 patents (2 invention patents), published 7 papers, formed 1 construction method, and compiled 1 enterprise standard. Scientific and technological novelty searches show that the research results have generally reached the international advanced level. The corresponding technology has been successfully applied to dozens of major projects in Shanghai, Tianjin, Wuhan, Ningbo, Hangzhou, Fuzhou and other places, including the Shanghai City Bund Channel Reconstruction Project (removal of entire obstacle piles with a pile depth of 65 meters and a diameter of 1200mm), and Shanghai City Longyao Road River-Crossing Tunnel Pile Extraction Project (removal of entire obstacle piles with an inclination of 30 degrees and a pile length of 38 meters). In the past ten years, the new output value has been 785.78 million yuan (the total new output value of this technical achievements in the past three years has been 323.84 million yuan, new profits have been 65.47 million yuan, and new taxes have been 10.98 million yuan).
Last updated
10:53:30, Nov 04, 2025
Information contributed by
See original page on 
Report