Construction Engineering Testing

Home > Our Services > Our Services > Detection and Testing > Building Materials and Construction Engineering > Construction Engineering Testing

Foundation Testing

Foundation engineering testing is a core component of the construction engineering quality control system, directly impacting the safety, stability, and durability of the entire building. As the "foundation" of a structure, the subgrade and foundation play a critical role in transferring the loads from the superstructure to the underlying soil. Any hidden defects in the quality of the foundation work can lead to severe consequences such as uneven settlement, cracking, tilting, or even collapse of the building.

With the acceleration of urbanization and the continuous expansion of infrastructure development in China, there is a growing number of projects under complex geological conditions, including high-rise buildings, large bridges, and underground works. Consequently, higher demands are placed on foundation testing technologies. Scientific and standardized testing not only effectively assesses bearing capacity, deformation characteristics, and pile integrity, but also provides reliable data for engineering design optimization and construction process improvement. This helps prevent major engineering accidents, protect lives and property, and yields significant social and economic benefits.

Testing Products

Foundation engineering testing covers a wide range of items, primarily divided into subgrade soil testing and pile foundation testing.

Subgrade Soil Testing: Includes in-situ tests (such as cone penetration test (CPT), standard penetration test (SPT), and plate load test) and geotechnical laboratory tests (e.g., particle size analysis, water content, density, shear strength) to evaluate the engineering properties of the subgrade soil.

Pile Foundation Testing: Addresses various foundation types, including integrity testing (using low-strain, high-strain, and cross-hole sonic logging methods), bearing capacity testing (static load test, high-strain method), anchor locking force testing, and ground treatment effectiveness evaluation (e.g., composite foundation bearing capacity, compaction degree).

Testing should cover the entire process, from engineering geological investigation and foundation construction to completion acceptance and subsequent service, ensuring quality control.

Testing Items

Static Load Tests on Foundation Piles:

Vertical compressive static load test on a single pile

Horizontal static load test on a single pile

Static Load Tests on Subgrade:

Static load test on natural subgrade

Static load test on composite subgrade

In-situ Subgrade Tests:

Cone penetration test (CPT), standard penetration test (SPT), light dynamic penetration test

Pile Integrity Testing:

Low-strain method

High-strain method

Cross-hole sonic logging (CSL)

Core drilling method

Quality Testing of Bored Pile Holes (e.g., hole diameter, verticality, sediment thickness)

Pullout Force Testing of Anchors and Soil Nails

Foundation and Subgrade Quality Assessment

Testing Standards

Foundation testing strictly adheres to a system of national and industry technical standards.

Code for design of building foundation (GB 50007): Provides basic requirements for foundation calculation and design.

Standard for acceptance of construction quality of building foundation (GB 50202): Specifies the inspection items and methods for quality acceptance.

Technical code for testing of building foundation piles (JGJ 106): Details technical requirements for pile bearing capacity and integrity testing.

Code for investigation of geotechnical engineering (GB 50021): Defines testing methods for subgrade soil evaluation.

Other specialized standards include the “Technical code for ground treatment of buildings (JGJ 79)” and the “Technical specification for anchor testing and monitoring (JGJ/T 401)” .

These standards provide authoritative guidance on the quantity of tests, method selection, data analysis, and result evaluation. Testing institutions must strictly implement these standards to ensure the standardization and effectiveness of their testing work.

Service Advantages

Our testing service philosophy has evolved into a comprehensive service system based on "Science, Impartiality, Accuracy, and Efficiency," deeply integrating the orientations of "Proactive, Precise, Safe, and Public-Focused." By upholding the service attitude of "Warm-hearted, Meticulous, Patient, Sincere, and Dedicated," and the work style of "Rigorous, Professional, and Efficient," we continuously improve our technical capabilities and service levels. We are committed to becoming a technical support pillar that the government trusts, enterprises rely on, and the public finds satisfactory, safeguarding high-quality economic and social development and public safety.