Southeast University Bi-directional Static Axial Load Test CompanyBrief introduction
Nanjing Dongda Self-Balanced Pile Foundation Testing Co., Ltd., known as DDSB, originated from Southeast University (DongNanDaXue, simplified as Dongda). DDSB has a team of experts in geotechnical engineering, including Professors, PH. Ds, experienced engineers and skilled workers.
As developed by Prof. Gong Weiming, DDSB’s bi-directional static load testing (also known as O-cell load testing) has been used in pile test since 1996, and it was named Self- balanced method in China (by Prof. Gong). In China, the company was the first to research and adopt the bi-directional method, and currently excels at it.
DDSB is a specialized foundation testing company established primarily by faculty members from Southeast University. Leveraging the resources of Southeast University's bi-directional Testing Technology Center, originally established in 1992 as the Southeast University Underground Engineering Research Center. The company focuses on underground structural engineering research, and the key areas include pile foundation and ground improvement technologies, deep foundation pit engineering, and underground engineering monitoring techniques with analytical theories.
公司拥有一座现代化综合办公楼，建筑面积超过3000平方米，空间开阔、功能多元。该建筑集办公、科研、会议、展示等多功能于一体，不仅设有舒适高效的办公区域，还配备了先进的科研实验室和技术开发中心，可充分满足日常办公与创新研发的双重需求。整体环境设计科学合理，兼顾工作效率与员工体验。
The company operates a modern, multi-functional office building with a floor area exceeding 3,000 square meters, offering spacious and versatile spaces. This facility integrates office, research, conference, and exhibition functions, featuring not only comfortable and efficient workspaces but also state-of-the-art research laboratories and a technology development center. It fully accommodates both daily operations and innovative R&D activities. The overall environment is designed scientifically and rationally, balancing productivity with employee experience.
Technical team
The company employs over 30 technical professionals in geotechnical engineering, structural engineering, instrumentation, and related fields, and operates a dedicated factory for manufacturing load cells and data acquisition equipment. The company currently possesses over 30 sets of field and laboratory testing equipment, including load cells for bi-directional testing, bi-directional test data acquisition systems, high-pressure oil pumps, digital logging instruments for cast-in-place pile drilling, non-metallic ultrasonic detectors, geological drilling rigs, inclinometers, strain data acquisition systems, dynamic testing instruments.
Business scope
The company's primary testing services include: foundation bearing capacity testing, static axial compressive load testing, high-strain dynamic testing, ultrasonic cross-hole testing, bi-directional static axial compressive load testing, lateral load testing, etc.
We have already gained the CNAS certificate.
In China, DDSB’s bi-directional static load testing has been used in a large number of major infrastructure projects, such as high-rise buildings, long span bridges, high-speed rails, subways, harbors and wind turbines, etc.
In worldwide, DDSB’s bi-directional static load testing has been used in construction projects in over 20 countries, such as Malaysia, Singapore, Indonesia, Vietnam, Cambodia, Brunei, Maldives, Angola, Sudan, Mozambique, Zimbabwe, Côte d’Ivoire, Panama, Guyana, Columbia, Mongolia, etc.
In worldwide, DDSB’s bi-directional static load testing has been used in construction projects in over 20 countries, such as Malaysia, Singapore, Indonesia, Vietnam, Cambodia, Brunei, Maldives, Angola, Sudan, Mozambique, Zimbabwe, Côte d’Ivoire, Panama, Guyana, Columbia, Mongolia, etc.