1.0.1 This code was formulated with a view to regulating the monitoring of building foundation pit engineering, ensuring monitoring quality, providing criteria for information construction and optimum design, achieving reliable achievement, advanced technology, economy and rationality, ensuring building foundation pit safety and protecting surrounding environment of building foundation pit.
1.0.2 This code is applicable to monitoring of ordinary soil and soft soil building foundation pit engineering, and it is not applicable to the monitoring of special soil such as rock building foundation pit engineering and frozen soil, expansive soil and collapsible loess and of building foundation pit engineering of buildings in corrosive environment.
1.0.3 Building foundation pit engineering design plan, the geotechnical engineering conditions of the construction site, surrounding environment conditions and construction scheme shall be comprehensively considered for monitoring of building foundation pit engineering to formulate reasonable monitoring program, organize carefully and implement monitoring.
1.0.4 The monitoring of building foundation pit engineering shall not only meet the requirements of this code, but also shall comply with those in the current relevant standards of the nation.
1 General Provisions 1
2 Technical Terms 2
3 Basic Regulations 3
4 Monitoring Items 5
4.1 General Regulations 5
4.2 Instrument Monitoring 5
4.3 Inspection and Examination 6
5 Arrangement of Monitoring Point 8
5.1 General Regulations 8
5.2 Building foundation pit and Bracing and Retaining Structure 8
5.3 Surroundings around Building foundation pit 10
6 Monitoring Methods and Precision Requirements 12
6.1 General Regulations 12
6.2 Monitoring of Horizontal Displacement 12
6.3 Monitoring of Vertical Displacement 13
6.4 Monitoring of Horizontal Displacement in Deep Stratum 14
6.5 Monitoring of Inclination 14
6.6 Monitoring of Crack 14
6.7 Monitoring of Internal Force in Bracing and Retaining Structure 15
6.8 Monitoring of Soil Pressure 15
6.9 Monitoring of Pore Water Pressure 15
6.10 Monitoring of Water Table 16
6.11 Monitoring of Tensile Force in Anchor Rod and Soil Nail 16
6.12 Monitoring of Vertical Displacement in Different Stratum 16
7 Frequency of Monitoring 18
8 Alarming on Monitoring 20
9 Data Processing and Message Feedback 23
Appendix A Daily Report on Horizontal Displacement and Vertical Displacement 25
Appendix B Daily Report on Horizontal Displacement in Deep Stratum 26
Appendix C Daily Report on Internal Force in Retaining Structure or Column, Soil Pressure and Pore Water Pressure 27
Appendix D Daily Report on Axial Force in Bracing and Tensile Force in Anchor Rod and Soil Nail 29
Appendix E Daily Report on Water Table, Ground Vertical Displacement, and Upheaval in the Bottom 30
Appendix F Daily Report on Crack 31
Appendix G Daily Report on Inspection and Examination 32
Explanation of Wording in This Code 33
List of Quoted Standards 34
1.0.1 This code was formulated with a view to regulating the monitoring of building foundation pit engineering, ensuring monitoring quality, providing criteria for information construction and optimum design, achieving reliable achievement, advanced technology, economy and rationality, ensuring building foundation pit safety and protecting surrounding environment of building foundation pit.
1.0.2 This code is applicable to monitoring of ordinary soil and soft soil building foundation pit engineering, and it is not applicable to the monitoring of special soil such as rock building foundation pit engineering and frozen soil, expansive soil and collapsible loess and of building foundation pit engineering of buildings in corrosive environment.
1.0.3 Building foundation pit engineering design plan, the geotechnical engineering conditions of the construction site, surrounding environment conditions and construction scheme shall be comprehensively considered for monitoring of building foundation pit engineering to formulate reasonable monitoring program, organize carefully and implement monitoring.
1.0.4 The monitoring of building foundation pit engineering shall not only meet the requirements of this code, but also shall comply with those in the current relevant standards of the nation.
Contents of GB 50497-2009
1 General Provisions 1
2 Technical Terms 2
3 Basic Regulations 3
4 Monitoring Items 5
4.1 General Regulations 5
4.2 Instrument Monitoring 5
4.3 Inspection and Examination 6
5 Arrangement of Monitoring Point 8
5.1 General Regulations 8
5.2 Building foundation pit and Bracing and Retaining Structure 8
5.3 Surroundings around Building foundation pit 10
6 Monitoring Methods and Precision Requirements 12
6.1 General Regulations 12
6.2 Monitoring of Horizontal Displacement 12
6.3 Monitoring of Vertical Displacement 13
6.4 Monitoring of Horizontal Displacement in Deep Stratum 14
6.5 Monitoring of Inclination 14
6.6 Monitoring of Crack 14
6.7 Monitoring of Internal Force in Bracing and Retaining Structure 15
6.8 Monitoring of Soil Pressure 15
6.9 Monitoring of Pore Water Pressure 15
6.10 Monitoring of Water Table 16
6.11 Monitoring of Tensile Force in Anchor Rod and Soil Nail 16
6.12 Monitoring of Vertical Displacement in Different Stratum 16
7 Frequency of Monitoring 18
8 Alarming on Monitoring 20
9 Data Processing and Message Feedback 23
Appendix A Daily Report on Horizontal Displacement and Vertical Displacement 25
Appendix B Daily Report on Horizontal Displacement in Deep Stratum 26
Appendix C Daily Report on Internal Force in Retaining Structure or Column, Soil Pressure and Pore Water Pressure 27
Appendix D Daily Report on Axial Force in Bracing and Tensile Force in Anchor Rod and Soil Nail 29
Appendix E Daily Report on Water Table, Ground Vertical Displacement, and Upheaval in the Bottom 30
Appendix F Daily Report on Crack 31
Appendix G Daily Report on Inspection and Examination 32
Explanation of Wording in This Code 33
List of Quoted Standards 34
