Green products, green processes, green construction

This on-site construction observation meeting for static drilling rooted piles was a highlight!

Complete sets, intelligent, green

Rooted pile construction method solutions

Stunning the whole audience!

On the morning of September 19, the second meeting of the research group for "Research and Application of Static Drilling Rooted Pile Technology in Shanghai Municipal Railway Projects" and the on-site observation meeting for the static drilling rooted pile construction process were grandly held at the static drilling rooted pile construction site in Jinshan District, Shanghai.

Lead unit of the research group:The meeting was led and hosted by the research group units Shanghai Shentie Investment Co., Ltd., Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd., and Shanghai Mechanical Construction Group Co., Ltd.

Participating units:China Railway Design Corporation, Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., China Railway Shanghai Design Institute Group Co., Ltd., China Railway Fourth Survey and Design Institute Group Co., Ltd., Shanghai Tunnel Engineering & Rail Transit Design and Research Institute, Shanghai Jiao Tong University, Shanghai Zhongchun High-Tech Pile Industry Co., Ltd., Shanghai Guangda Foundation Engineering Co., Ltd., Shanghai Engineering Machinery Factory Co., Ltd. and other units participated in the event.

Co-organizing units:Shanghai Zhongchun High-Tech Pile Industry Co., Ltd., founded in 1985, has focused on the cement products field for more than 30 years, with business scope covering precast piles, subway segment linings and many other fields. As a supplier of pile materials for static drilling rooted pile construction—pretensioned prestressed concrete bamboo-joint piles (PHDC), pretensioned prestressed concrete pipe piles (PHC), and composite reinforced prestressed concrete pipe piles (PRHC)—it is one of the benchmark enterprises providing integrated design, R&D, production and technical solutions.

Co-organizing units:Shanghai Guangda Foundation Engineering Co., Ltd. is a large-scale foundation engineering construction enterprise integrating R&D and construction. Founded in December 2000, the company holds a Grade I professional contracting qualification for foundation engineering construction. It owns nearly 100 sets of various large and advanced professional construction equipment, including TRD method, static drilling rooted pile method, RJP method, MJS method, diaphragm walls, steel strut axial force servo systems, and various pile drivers, cranes, excavators, etc.

Co-organizing units:Shanghai Engineering Machinery Factory Co., Ltd., the design, manufacturing and sales unit of the SDP series static drilling rooted method drilling rigs. Founded in 1921, the company has always adhered to the service philosophy of "professional service, creating value," striving to create maximum economic benefits for customers and taking maximum customer satisfaction as its pursuit.

▲ Site of the second meeting of the research group for "Research and Application of Static Drilling Rooted Pile Technology in Shanghai Municipal Railway Projects"

The static drilling rooted pile method uses a static drilling rooted pile method drilling rig for drilling, deep mixing and bottom-enlarging grouting mixing, and finally implants precast piles. That is, it refers to a pile foundation method in which pretensioned prestressed concrete bamboo-joint piles (PHDC), pretensioned prestressed concrete pipe piles (PHC), and composite reinforced prestressed concrete pipe piles (PRHC) of different specifications and models are combined in various ways to meet design requirements, and constructed according to processes such as drilling, reaming, grouting and implantation.

At this second meeting of the research group for "Research and Application of Static Drilling Rooted Pile Technology in Shanghai Municipal Railway Projects" and the on-site observation meeting for the static drilling rooted pile construction process, nearly 30 experts, chief engineers and guest representatives from various units visited the site to observe, exchange and discuss around "Innovation and Application of Static Drilling Rooted Pile Technology." The cutting-edge intelligent technology innovation achievements and advanced green construction management experience displayed at the observation meeting won unanimous recognition and praise from those present.

▲ Observation meeting site

The star of this observation meeting, the SDP110H-FM2 static drilling rooted method drilling rig, is a product in which Shanggong Machinery, leveraging years of accumulated deep-layer technology, adopts internationally renowned brands for key components. It features high torque, large drilling depth, high technological content, good reliability and high construction efficiency, with performance reaching the international advanced level.

▲ Shanggong Machinery SDP110H-FM2 static drilling rooted method drilling rig

The observation meeting site set up an "equipment on-site test area," comprehensively and three-dimensionally demonstrating the static drilling rooted pile process's technologies in informatization, digital construction, green environmental protection construction and on-site pile implantation, creating a visual feast of green intelligent pile implantation construction for the experts, chief engineers and guests, enabling them to gain a deeper understanding of the advantages of the complete-set products of the static drilling rooted pile process and to experience the new heights of equipment intelligence, digitalization and green environmental protection technology.

▲ Observation meeting site

Practice brings lasting progress, and a journey of ten thousand miles holds promise! Shanggong Machinery is accelerating the transformation and upgrading of its products toward "high-end, intelligent, green, service-oriented and customized" development, providing global customers with "smarter, greener, more reliable, more comfortable and more economical" static drilling rooted pile construction method solutions.

Introduction to the static drilling rooted pile method

Method features:

● No soil squeezing, no vibration, low noise;

● Good pile quality, with pile top elevation fully controllable;

● Extremely strong vertical compressive, uplift and horizontal load resistance;

● Low slurry discharge;

● Good social benefits and promotion value.

Scope of application:

● Suitable for areas with various seismic fortification intensities, with applicable pile diameters of 500-1200 mm;

● Cohesive soil, silt, sand, fill, gravel (cobble) soil, as well as rock strata with complex geological conditions, many interlayers, uneven weathering and large variations in softness and hardness, with a maximum penetration depth of 90 m;

When the construction site is adjacent to buildings (structures) or underground pipelines and other engineering facilities, and the use of other pile types would cause adverse effects;

● When the elevation of the top of the pile-end bearing stratum varies greatly and the pile length is difficult to determine accurately, and the construction site does not have conditions for cast-in-place concrete or the quality of on-site cast-in-place concrete is not easy to guarantee;

● Projects with restrictions on large amounts of slurry discharge;

● When the design requires relatively large single-pile bearing capacity, and the technical and economic indicators and construction conditions are superior to those of other pile types.  

▲ Construction process of static drilling rooted piles

Advantages of static drilling rooted piles

Static drilling rooted piles adopt low-noise drilling rigs (static drilling) and the embedment method to complete precast piles (rooted piles) as a pile foundation technology, and are the culmination of modern pile foundation technology. After years of promotion and application, their significant advantages of green environmental protection, energy saving and emission reduction—"more, faster, better and more economical"—have been highly recognized by all sectors of society.

Method features:

"More"

● By adopting combinations of multiple pile types such as bamboo-joint piles and composite reinforced piles, as well as bottom-enlarging and grouting technologies, the compressive, uplift and horizontal bearing capacities of the pile foundation are greatly improved;

● Suitable for various geological conditions, especially pile foundations requiring high bearing capacity and high loads.

"Faster"

● High construction efficiency, with a single machine driving more than 300 meters of piles per day, yielding higher economic benefits than other pile types;

● Through the drilling rig current, changes in the bearing stratum can be detected, with no need for pile cutting;

● Simple, quick and reliable mechanical connection methods can be selected to ensure the reliability of pile splicing and the efficiency of construction.

"Better"

1. Pile materials are factory-prefabricated, ensuring quality;

2. Embedded construction causes no soil squeezing and no damage to the pile body;

3. Intelligent construction with fully automatic equipment monitoring ensures construction quality;

4. The pile body and pile joints are protected by cement soil, improving corrosion resistance;

5. Green and environmentally friendly, fundamentally solving the problem of slurry discharge in engineering construction.

"More economical"

Under the same conditions, compared with bored cast-in-place piles:

1. Water saving (construction water consumption reduced by 90%);

2. Energy saving (construction energy consumption reduced by 40%);

3. Emission reduction (slurry discharge reduced by 70%);

4. Time saving (construction efficiency improved by 50%);

5. Cost saving (project cost reduced by 10%-20%);

6. Carbon emissions reduced by more than 50%.

▲ Pile material for static drilling rooted piles (bamboo-joint pile)

▲ Static drilling rooted pile construction site