Reliable foundation machinery engineered for optimal output under extreme torque conditions.
The definitive guide to load distribution, geotechnical suitability, and mechanical structural integrity.
Under-reamed piles represent a highly specialized sub-category of bored cast-in-situ concrete piles. Designed to counter upward thrusts in highly expansive clays (such as black cotton soils), these piles utilize one or more bulb enlargements along their shafts. Under-reamed piles are structurally categorized as bored piles because their installation relies on pre-drilling vertical shafts using advanced rotary drilling rigs before placing concrete.
By increasing the contact area along the vertical shaft, multi-under-reamed piles achieve massive load-bearing capacities without scaling the shaft diameter itself. This configuration prevents structural shearing and mitigates foundation settlement. Excavation is completed through dynamic mechanical Kelly bars combined with expanding under-reaming tools, reducing excavation spoil and optimizing concrete consumption.
In structural engineering, selecting the appropriate deep foundation system dictates the safe performance of structures subjected to vertical loads, wind sheer, and seismic forces. Standard bored piles derive their capacity primarily through skin friction along the shaft and end-bearing resistance at the base. However, in clayey soils with high swelling index variations, moisture fluctuation causes substantial volume changes, inducing destructive tensile stresses in standard pile shafts.
Under-reamed piles solve this challenge. By anchoring the lower bulb below the active moisture zone, the structure gains stability. SINOVO heavy-duty rotary drilling rigs provide the precision calibration and high torque outputs needed to ensure exact bulb dimensions, avoiding geological collapse during the under-reaming process.
| Parameters | Standard Bored Piles | Under-Reamed Bored Piles |
|---|---|---|
| Primary Mechanism | Skin Friction + End Bearing | Anchorage Bulb Action + Augmented Skin Friction |
| Optimal Soil Profile | Medium-dense sands, stable rocks | Black cotton soils, soft expansive clays |
| Uplift Resistance | Moderate (highly dependent on shaft length) | Exceptional (due to mechanical bulb block) |
| Required Machinery | Rotary Rig with Standard Drilling Bucket | Rotary Rig with specialized Under-Reamer Attachment |
How modern foundation requirements drive the transition toward high-efficiency bored piles.
Transportation networks demand deep foundation shafts to withstand extreme dynamic forces. Standardizing on bored piles equipped with specialized under-reamed bulbs lowers overall structural weight while ensuring absolute deflection control.
Solar trackers and onshore wind turbines are highly susceptible to uplift and overturning moments. Under-reamed bored piles provide high cost-efficiency per megawatt, preventing displacement under wind gusts.
Bored piling operations generate minimal vibration and noise compared to driven displacement piles, meeting tight municipal environmental requirements in dense metropolitan zones.
SINOVO Heavy Industry's modern production ecosystem, offering short lead times and robust reliability.
Established with a total investment of 120 million yuan and covering 67 mu (7,800 square meters of specialized building area), SINOVO Heavy Industry's production complex is strategically optimized for advanced production flow. Located 100 kilometers from Tianjin Port, we streamline logistics to lower transport costs and dispatch delays for international clients.
Through the integration of automated robotic welding cells, computer-aided structural stress analysis, and hydraulic testing facilities, we produce heavy foundation equipment with long lifespans and high durability. Our production capacity reaches an annual output of 1,000 core drilling rigs, 250 water well drilling units, and 120 specialized rotary piling rigs.
100% In-house Electronic Hydraulic Drive System Testing
Premium Sourced Global Hydraulic Components & Steel Structures
A trusted global supplier of construction machinery equipment and consulting solutions.
SINOVO Group is a professional supplier of construction machinery equipment and construction solutions, engaged in the field of construction machinery, exploration equipment, import and export product agent and construction scheme consulting, has been serving the world's construction machinery and exploration industry suppliers.
As early as the early 1990s, the backbone members of the company have been serving in the field of construction machinery. After more than 20 years of development and innovation, the company has established a long-term strategic cooperation alliance with many top equipment manufacturers in the world and famous equipment manufacturers in China, and has won many awards in China's engineering machinery and equipment export projects for many years.
The business scope of SINOVO group is mainly focused on pile construction machinery, hoisting, water well drilling and geological exploration equipment, sales and export of construction machinery and equipment, as well as the solution of machines and tools. It has established trade relations with more than 120 countries and regions in the world, forming a sales, service network and diversified marketing pattern on five continents.
All products have successively obtained ISO9001:2015 certification, CE certification and GOST certification. Among them, the sales of piling machinery is the first brand in China in Southeast Asia market, and has continuously become the excellent Chinese supplier of African exploration industry. And in Singapore, Dubai, Algiers design services, to provide global technology and spare parts supply quality after-sales service.
As early as the early 1990s, the backbone members of SINOVO group have been serving in the field of construction machinery. After more than 20 years of development and innovation, the company has established a long-term strategic cooperation alliance with many top equipment manufacturers in the world and famous equipment manufacturers in China, and has won many awards in China's engineering machinery and equipment export projects for many years.
2008: The company carried out strategic integration and established TEG FAR EAST company in Singapore to strengthen the development of Southeast Asian market.
2010: The company invested in the production and manufacturing base of Hebei Xianghe emerging industry demonstration zone, covering an area of 67 mu, with a total investment of 120 million yuan, engaged in the R & D and manufacturing of pile engineering machinery, hoisting, water well drilling and geological exploration equipment. The factory is located in Xianghe Industrial Park, 100 km away from Tianjin port, reducing transportation costs.
Beijing Sinovo International & Sinovo Heavy Industry Co. Ltd. are ISO9001: 2015 certified manufacturer of drilling rigs and piling rigs. Since our beginning, we have been committed to providing high quality drilling equipment to global customers. Thanks to our efforts over the years, we have established a production base that occupies an area of 7, 800 square meters and is equipped with over 50 pieces of equipment.
In order to satisfy increasing market demands, we continually work to increase our production capacity. Now our annual production for core drilling rigs is 1, 000 units; water well drilling rigs is 250 units; and rotary drilling rigs is 120 units. In addition, thanks to the hard work of our professional engineers, we are at the forefront of the field of electronic hydraulic control and drive systems, which helps keep our drilling equipment competitive in the market.
Our company is located in Beijing City, the capital of China. Here we have access to convenient transportation, abundant labor resources, and advanced technology. This facilitates the production and shipping of our products and allows us to provide them at lower prices.
A comprehensive three-stage service structure designed to secure and optimize your project investment.
As a long-established drilling rig manufacturer in China, SINOVO group do business with reputation and word of mouth. We are dedicated to provide customers perfect service. To make customers feel secure in using our products, we establish a complete after-sales service system, and provide a one-year warranty for our drilling rigs. During the warranty period, we provide free debugging, operator training and maintenance service. In addition, we also offer free spare parts. As our main components are imported from world renowned companies, our overseas customers can maintain these components easily.
Driven by industry specialists with decades of experience in heavy machinery engineering.
We have an excellent leading team, engaged in the production and sales of construction machinery and equipment for more than 30 years. Experienced foreign trade business team and professional after-sales team.
Sinovo group attaches great importance to personnel training and technology research and development, has a professional technology center research and development team, and has obtained a number of patent projects.
Evidence of our commitment to safety, efficiency, and engineering innovation.
Patent certificate (1)
Patent certificate (2)
Patent certificate (3)
Patent certificate (4)
Patent certificate (5)
Patent certificate (6)
GOST(TR）Certificate（1）
GOST(TR）Certificate（2）
Observe the structural manufacturing process and international export packaging pipeline.
SINOVO machinery deployed across critical construction sites globally.
Highly dynamic design engineered specifically for micro piles, ground anchors, and photovoltaic vertical installations. Adapted for heavy-duty geological strata.
Precision-engineered quality, certified warranties, and reliable customer support.
To make customers feel secure in using our products, we establish a complete after-sales service system.
We have a number of professional technical personnel to ensure all aspects of the product meet high engineering standards.
During the warranty period, we provide free debugging, operator training, and maintenance service.
In-depth technical specifications of our primary machinery and tool categories.
The SK666 Micro Pile Drilling Rig is a versatile engineering drilling machine that combines high efficiency, flexibility, and stability. It is specifically designed for large-diameter, high-precision drilling operations. Widely used in micro pile, photovoltaic hole, anchor bolt hole, casing hole, and blasting hole construction, it offers excellent geological adaptability and operational convenience, significantly enhancing construction efficiency and hole quality.
The hydraulic splitting machine utilizes high-pressure hydraulic oil as its power source, applying advanced oblique wedge principles to generate splitting forces ranging from hundreds to thousands of tons. This industrial-grade equipment can effortlessly split massive boulders within seconds, efficiently separating hard ore from rock formations. Compact and lightweight design for easy operation. Widely used in quarrying, mining, infrastructure projects, urban construction and disaster relief operations.
TR60 rotary drilling is a newly designed self-erecting rig, which adopts advanced hydraulic loading back technology, integrates advanced electronic control technology. The overall performance has reached advanced world standards. Improvements on both structure and control make the system simpler and more compact. Suitable for drilling with telescopic friction or interlocking Kelly bar (standard supply) and CFA drilling applications (optional).
Developed for urban deep foundation pit support, soil nail wall support, railway/highway slope support, anti-floating anchor rods, thin underground continuous walls, pipe shed grouting, water stop grouting, and rock/soil blasting hole construction. Versatile setup allows for single-tube and double-tube construction of general rotary grouting engineering as well as casing/drill rod composite drilling.
Suitable for urban underground space, subway, highway, bridge, roadbed, dam foundation and other industrial and civil building foundation reinforcement projects. Can be used for drilling pipe diameters of 89~142mm multi-tube vertical/horizontal construction, but also can be used for general rotary jet (swing spray, fixed spray) engineering construction. Equipped with a 3-ton crane arm, it effectively reduces labor intensity.
The loader-type piling machine is modified from a loader chassis and is primarily used for small-diameter, shallow-depth foundation projects, especially suitable for drilling and installing utility poles, photovoltaic piles, and other fast-pace structural anchor projects.
SK800 Multi-functional Anchor Drilling Rig: water and gas dual-use, multi-purpose system. It is suitable for anti-floating anchor, anchor cable anchoring, slope support, high-pressure rotary spraying, tunnel grouting, submerged hole into the rock, pit casing, core drilling, miniature piles, and steel pipe piles.
Adopting a high-power top impact system, this power head can achieve the effect of impact drilling without the use of a submerged hammer and air compressor. Features high torque, high rotation speed and strong power. Excellent for sand pebbles, gravel, sandy soil, sand layers, and other formations that easily collapse.
Designed according to the needs of construction environments of front-line customers and the needs of Φ50-90mm small hole diameter. The whole machine is small, lightweight, has fast travel speed and strong cross-country ability. Suitable for static explosions, small hole diameter drug explosions in rock drilling and drilling.
Main motor 75KW | Diameter Ø1200mm | Drilling motor 18.5KW | Oil pump motor 18.5KW | Drilling force 460KN | Drilling speed 0.05-2.2m/min | Rotating speed: Forward 5-96RPM, Reverse 5-90RPM | Total Weight 25000KG | Pile depth ≤28M | Drill rod specs: 180x180x16mm | Pile diameter ≤1200mm | Core pile section size 500-1200mm | Chain Size 36A | Mast structure height: Type II-30M | Hydraulic walking step system.
B2B technical inquiries resolved by our design engineers.
Heavy duty construction foundation machinery for worldwide shipment.
SINOVO
