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The business scope of engineering inspection and monitoring of MCC Construction Research Institute (Shanghai) Co
, Ltd
includes foundation engineering inspection, equipment and environmental vibration testing, foundation pit monitoring, construction safety monitoring of large and complex structures, structural health monitoring, etc
The company is equipped with experienced technical personnel and advanced instruments and equipment
It has undertaken a series of large-scale testing projects nationwide

1
Foundation engineering inspection
The detection of foundation engineering mainly includes the static load detection of the bearing capacity of foundation and composite foundation, the bearing capacity detection of piles, and the integrity detection of piles

Bearing capacity test of foundation and composite foundation: static load, static cone penetration test, standard penetration test, portable cone penetration test

Business scope of pile foundation testing:
1
Pile bearing capacity test - static load: horizontal bearing capacity of single pile, Internal force test of pile body, vertical compressive bearing capacity of single pile and vertical uplift bearing capacity of single pile;
2
Pile bearing capacity test - high strain;
3
Pile integrity detection - high strain, low strain, core drilling, acoustic transmission method;
4
Pile foundation hole forming detection - hole forming detection;
The main methods of pile foundation detection include static load test, core drilling method, low strain method, high strain method, acoustic transmission method and so on
Among them, pile foundation static load test methods include surcharge test and anchor pile method

2
Foundation pit monitoring
Foundation pit monitoring refers to the inspection and monitoring of the building foundation pit and the surrounding environment during the construction and use period
Foundation pit monitoring mainly includes: supporting structure, relevant natural environment, construction conditions, groundwater conditions, soil at the bottom of the foundation pit and around, surrounding buildings (structures), surrounding underground pipelines and underground facilities, surrounding important roads, and other objects that should be monitored

The construction risk of large foundation pit in soft soil area is large, which has poor soil quality, high groundwater level, long construction period and large influence range
In order to ensure the smooth progress of the project, it is necessary to carry out a number of safety monitoring on the project itself and surrounding buildings and structures to provide accurate information for construction

3
Structural health monitoring
Structural health monitoring refers to the damage detection and identification of engineering structures For example, the material properties or the geometric properties of the structural system are changed, as well as the boundary conditions and the continuity of the system
The overall continuity of the system plays an important role in the service capacity of the structure

Structural health monitoring involves observing the changes of the system over time by analyzing the dynamic response data of the sensor array arranged in the structure regularly, extracting the damage sensitive eigenvalues, and determining the health state of the structure through data analysis
For long-term structural health monitoring, the data are updated regularly to estimate whether the aging of the structure and the harsh service environment can continue to realize the design function of the engineering structure

4
Deformation monitoring
The deformation of structure is inevitable in use, and the deformation is the fundamental cause of structural damage
For example, super high-rise buildings cause deformation of surrounding buildings (structures) during foundation pit construction; Structural deformation and settlement caused by foundation deformation, internal stress and external load change; http://www
chinajy-sh
com
cn/ The deformation of tunnel body caused by repeated vibration during the operation of rail transit and the deformation of long-span flexible structures such as bridges caused by load
Therefore, it is very necessary to understand the deformation of some special structures or structures in special environment
The long-term deformation monitoring of these structures is the most effective way to analyze their internal force changes and evaluate their safety

5
Vibration test of environment and equipment
1) Vibration performance test of building structure
The modal parameters (natural frequency, damping coefficient, mode shape, etc
) of the structure are obtained through the on-site vibration characteristic test of the building structure, and the damage degree of the structure is identified from the change of the inherent characteristics of the structure, which provides the basis for the reliability diagnosis and residual life estimation of the structure
Such as bridges, tunnels, heavy industrial plants, long-span spatial structures, important buildings, etc
2) Vibration isolation and vibration reduction transformation
In order to reduce the transmission of vibration from the vibration source to the surrounding environment and reduce the impact of environmental vibration on people's work, life and equipment, vibration isolation and vibration reduction measures can be taken to eliminate or weaken the vibration source and avoid the resonance area, such as installing vibration isolators, damping vibration absorbers, etc

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