As critical infrastructure in transportation, municipal works, and other sectors, the structural safety and operational efficiency of tunnels directly impact operational safety and socio-economic benefits. Tunnel testing involves the systematic inspection, evaluation, and monitoring of a tunnel’s structural condition, ancillary facility functionality, and operational environment using professional technical methods. Its core purpose is to detect defects early, warn of risks, guide maintenance and repair, and ensure the safety and stability of the tunnel throughout its lifecycle (construction phase → operation phase → maintenance phase).
Testing Products
High-Strength Bolts
Steel Components
Buried Steel Pipelines
Displacement
Static Deflection
Static Strain (Stress)
Dynamic Strain (Stress)
Dynamic Deflection
Impact Coefficient
Modal Parameters
Load-Bearing Capacity
Structural Alignment (Geometry)
Verticality
Structural Dimensions
Cable Force (Stay Cables)
Temperature
Fastening Axial Force of High-Strength Bolt Assemblies
Torque Coefficient of High-Strength Bolt Assemblies
Anti-Slip Coefficient of High-Strength Bolt Connections
Geometric Dimensions of Steel Structures
Steel Thickness
Non-Destructive Testing (NDT) of Steel and Welds
Coating Thickness
Final Torque of High-Strength Bolts
Acceleration
Velocity
Wind Speed
Technical Condition of Bridges
Hardness of High-Strength Bolts, Nuts, and Washers
Proof Load of High-Strength Nuts
Protection Potential (Cathodic)
Surface Roughness
Coating Adhesion
Surface Cleanliness (Degree of cleanliness)
Wedge Load of High-Strength Bolts
Grouting Defects in Prestressed Ducts
Cross-Sectional Dimensions (Tunnel)
Anchor Pull-Out Force
Lining (Support) Thickness
Density Behind Support (Lining)
Wall Surface Smoothness
Steel Support Spacing
Rebar Grid Dimensions
Rebar Spacing in Lining (Main Bar Spacing, Distance Between Two Layers)
Inverted Arch Thickness
Inverted Arch Fill Quality
Anchor Bolt (Steel Pipe) Length
Grouting Density of Anchor Bolt (Steel Pipe)
Observation Inside and Outside Tunnel
Crown Settlement
Ground Settlement
Geological Observation
Forward Geological Conditions
Distribution and Nature of Unfavorable Geological Bodies
Waterproofing Layer Construction Quality (Seam Width, Lap Length, Fastener Spacing, Weld Tightness)
Internal Displacement of Surrounding Rock
Anchor Bolt Axial Force
Surrounding Rock Pressure and Pressure Between Two Support Layers
Steel Support Internal Force
Internal Stress of Support (Lining)
Seepage Water Pressure
Water Flow Rate
Groundwater Level
Blasting Vibration
Illuminance
Noise
Wind Speed
CO Concentration
NO₂ Concentration
CO₂ Concentration
SO₂ Concentration
O₂ Concentration
NO Concentration
Methane (Gas) Concentration
Hydrogen Sulfide Concentration
Dust Concentration
Testing Items
Fastening Axial Force of High-Strength Bolt Assemblies
Torque Coefficient of High-Strength Bolt Assemblies
Anti-Slip Coefficient of High-Strength Bolt Connections
Geometric Dimensions of Steel Structures
Steel Thickness
Non-Destructive Testing (NDT) of Steel and Welds (Ultrasonic, Magnetic Particle Methods)
Coating Thickness
Final Torque of High-Strength Bolts
Hardness of High-Strength Bolts, Nuts, and Washers
Proof Load of High-Strength Nuts
Protection Potential (Cathodic)
Surface Roughness
Coating Adhesion
Surface Cleanliness (Degree of cleanliness)
Wedge Load of High-Strength Bolts
Displacement (Mechanical Measurement, Optical/Electrical Measurement, Inertial Method)
Static Deflection (Mechanical Measurement, Electrical Measurement, Optical/Electrical Measurement)
Static Strain (Stress) (Resistance Strain Gauge Method, Vibrating Wire Strain Gauge Method)
Dynamic Strain (Stress)
Dynamic Deflection
Impact Coefficient
Modal Parameters (Frequency, Mode Shape, Damping Ratio)
Load-Bearing Capacity
Structural Alignment (Optical/Electrical Measurement Method)
Verticality (Plumb Line Method, Total Station Horizontal Distance Method)
Structural Dimensions
Cable Force (Stay Cables)
Temperature
Fastening Axial Force of High-Strength Bolt Assemblies
Torque Coefficient of High-Strength Bolt Assemblies
Anti-Slip Coefficient of High-Strength Bolt Connections
Geometric Dimensions of Steel Structures
Steel Thickness
Non-Destructive Testing (NDT) of Steel and Welds (Ultrasonic, Magnetic Particle Methods)
Coating Thickness
Final Torque of High-Strength Bolts
Acceleration
Velocity
Wind Speed
Technical Condition of Bridges
Hardness of High-Strength Bolts, Nuts, and Washers
Proof Load of High-Strength Nuts
Protection Potential (Cathodic)
Surface Roughness
Coating Adhesion
Surface Cleanliness (Degree of cleanliness)
Wedge Load of High-Strength Bolts
Grouting Defects in Prestressed Ducts
Cross-Sectional Dimensions (Tunnel)
Anchor Pull-Out Force
Lining (Support) Thickness
Density Behind Support (Lining)
Wall Surface Smoothness
Steel Support Spacing
Rebar Grid Dimensions
Rebar Spacing in Lining (Main Bar Spacing, Distance Between Two Layers)
Inverted Arch Thickness
Inverted Arch Fill Quality
Anchor Bolt (Steel Pipe) Length
Grouting Density of Anchor Bolt (Steel Pipe)
Observation Inside and Outside Tunnel
Crown Settlement
Ground Settlement
Geological Observation
Forward Geological Conditions
Distribution and Nature of Unfavorable Geological Bodies
Waterproofing Layer Construction Quality (Seam Width, Lap Length, Fastener Spacing, Weld Tightness)
Internal Displacement of Surrounding Rock
Anchor Bolt Axial Force
Surrounding Rock Pressure and Pressure Between Two Support Layers
Steel Support Internal Force
Internal Stress of Support (Lining)
Seepage Water Pressure
Water Flow Rate
Groundwater Level
Blasting Vibration
Illuminance
Noise
Wind Speed
CO Concentration
NO₂ Concentration
CO₂ Concentration
SO₂ Concentration
O₂ Concentration
NO Concentration
Methane (Gas) Concentration
Hydrogen Sulfide Concentration
Dust Concentration
Testing Standards
High-Strength Bolts (Large Hexagon Head, Tension Control Bolt):
GB/T 3632, GB 50205, GB/T 1231, JGJ 82, JTG/T 3650, GB/T 50621, GB/T 3098.1, GB/T 4340.1, GB/T 230.1, GB/T 231.1
Steel Components (Steel columns, steel beams, various welded components):
GB/T 709, GB/T 50621, GB 50205, GB/T 11345, JG/T 203, GB/T 26951, GB/T 26952, GB 55006, GB/T 29712, GB/T 10610, GB/T 5210, GB/T 9286, GB/T 8923.1, GB/T 8923.2, GB/T 8923.3
Buried Steel Pipelines:
GB/T 21246
Displacement (Mechanical, Optical/Electrical, Inertial Methods):
JTG/T J21-2011; JTG/T J21-01-2015
Static Deflection (Mechanical, Electrical, Optical/Electrical Methods):
JTG/T J21-01-2015; JTG/T J21-2011; GB 50026-2020; GB 55018-2021; JTG 5120-2021
Static Strain (Stress) (Resistance Strain Gauge, Vibrating Wire Strain Gauge):
JTG/T J21-01-2015; JTG/T J21-2011; GB 50026-2020; GB 55018-2021; JTG 5120-2021
Dynamic Strain (Stress):
JTG/T J21-01-2015; JTG/T J21-2011; JTG 5120-2021
Dynamic Deflection:
JTG/T J21-01-2015; JTG/T J21-2011; GB 50026-2020; GB 55018-2021; JTG 5120-2021
Impact Coefficient:
JTG/T J21-01-2015; JTG/T J21-2011; JTG 5120-2021
Modal Parameters (Frequency, Mode Shape, Damping Ratio):
JTG/T J21-01-2015; JTG/T J21-2011
Load-Bearing Capacity:
JTG/T J21-01-2015; JTG/T J21-2011; JTG/T H21-2011; JTG 5120-2021
Structural Alignment (Optical/Electrical):
JTG F80/1-2017; JTG/T J21-2011; GB 50026-2020; GB 55018-2021; JTG/T 3650-02-2019
Verticality (Plumb Line, Total Station Horizontal Distance):
JTG F80/1-2017; GB 50026-2020; GB 55018-2021; JTG/T 3650-02-2019; JTG/T 3650-2020
Structural Dimensions:
JTG F80/1-2017; JTG/T 3650-2020; GB 50026-2020; GB 55018-2021
Cable Force:
JTG/T J21-2011; JTG/T 3365-01-2020; JTG/T J21-01-2015; JTG/T H21-2011; JTG/T D65-05-2015; JTG/T 3650-2020; JTG 5120-2021
Temperature:
JTG/T 3650-2020; JTG/T J21-2011; JTG/T H21-2011; JTG/T J21-01-2015; JTG 5120-2021
Fastening Axial Force of High-Strength Bolt Assemblies:
GB/T 1231-2006; GB 50205-2020; JGJ 82-2011
Torque Coefficient of High-Strength Bolt Assemblies:
GB 50205-2020; GB/T 1231-2006; JGJ 82-2011
Anti-Slip Coefficient of High-Strength Bolt Connections:
GB/T 1231-2006; GB 50205-2020; JGJ 82-2011; JTG/T 3650-2020
Geometric Dimensions of Steel Structures:
GB 50205-2020; GB/T 50621-2010
Steel Thickness:
GB 50205-2020; GB/T 50621-2010; GB/T 709-2019; GB/T 11263-2017; GB/T 706-2016; GB/T 11344-2021
NDT of Steel and Welds (Ultrasonic, Magnetic Particle):
GB 50205-2020; GB 50661-2011; GB/T 11345-2013; JG/T 203-2007; GB/T 2970-2016; GB/T 6402-2008; GB/T 7233.1-2023; GB/T 50621-2010; GB/T 15822.1-2005; GB/T 9444-2019; JB/T 8468-2014; GB/T 26951-2011; GB/T 26952-2011
Coating Thickness:
JT/T 722-2023; GB 50205-2020; GB 12441-2018; GB 14907-2018; GB/T 50621-2010; JTG F80/1-2017; GB/T 28699-2012; GB/T 9793-2012; GB/T 18593-2010; GB/T 11374-2012; GB/T 13452.2-2008
Final Torque of High-Strength Bolts:
JGJ 82-2011; GB 50205-2020; GB/T 50621-2010
Acceleration:
JTG/T J21-01-2015; JTG/T J21-2011; JTG/T H21-2011; CJJ/T 233-2015
Velocity:
JTG/T J21-01-2015; JTG/T J21-2011; JTG/T H21-2011; CJJ/T 233-2015
Wind Speed:
GB/T 35227-2017; JTG/T 3650-2020; JTG/T J21-01-2015; GB/T 18204.1-2013
Technical Condition of Bridges:
JTG/T H21-2011; JTG/T J21-2011; JTG/T J21-01-2015; JTG 5120-2021; JTG F80/1-2017; CJJ/T 233-2015; CJJ 99-2017
Hardness of High-Strength Bolts, Nuts, and Washers:
GB/T 1231-2006; GB/T 230.1-2018; GB/T 231.1-2018; GB/T 4340.1-2009; GB/T 4340.2-2012; GB/T 231.2-2012; GB/T 230.2-2022
Proof Load of High-Strength Nuts:
GB/T 1231-2006; GB/T 3632-2008; GB/T 3098.2-2015
Protection Potential:
TS 304-2019; GB/T 21246-2020; JTS/T 209-2020
Surface Roughness:
GB/T 10610-2009; JT/T 722-2008; GB/T 28699-2012; JTS/T 209-2020; GB/T 13288.4-2013
Coating Adhesion:
JT/T 722-2008; GB/T 28699-2012; GB 50205-2020; GB/T 5210-2006; GB/T 9286-2021; GB/T 9793-2012
Surface Cleanliness (Degree of cleanliness):
GB/T 8923.1-2011; GB/T 28699-2012; GB/T 8923.2-2008; GB/T 8923.3-2009
Wedge Load of High-Strength Bolts:
GB/T 1231-2006; GB/T 3632-2008; GB/T 3098.1-2010; GB/T 228.1-2021
Grouting Defects in Prestressed Ducts:
JTG/T 3650-2020; JTG/T 5122-2021; CECS 02:2020; GB 50204-2015; TB/T 3193-2016
Cross-Sectional Dimensions (Tunnel):
JTG 3360-2020; JTG F80/1-2017; JTG H12-2015; T/CECSG:J60-2020
Anchor Pull-Out Force:
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020; GB 50086-2015
Lining (Support) Thickness:
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020; JTG/T 3222-2020; TB 10223-2004; JGJ/T 456-2019; JTG 5220-2020
Density Behind Support (Lining):
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020; JTG/T 3222-2020; TB 10223-2004; JGJ/T 456-2019; JTG 5220-2020
Wall Surface Smoothness:
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020
Steel Support Spacing:
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020; TB 10223-2004; JTG/T 3222-2020; TB 10417-2018; JTG 5220-2020
Rebar Grid Dimensions:
JTG 3360-2020; JTG F80/1-2017; TB 10223-2004; TB 10417-2018
Rebar Spacing in Lining (Main Bar Spacing, Distance Between Two Layers):
JTG 3360-2020; JTG F80/1-2017; JTG/T 3222-2020; T/CECSG:J60-2020; TB 10223-2004
Inverted Arch Thickness:
JTG 3360-2020; JTG F80/1-2017; JTG/T 3222-2020; TB 10223-2004; TB 10013-2010; JTG 5220-2020
Inverted Arch Fill Quality:
JTG 3360-2020; JTG F80/1-2017; JTG/T 3222-2020; TB 10223-2004; CECS 03:2007; TB 10013-2010
Anchor Bolt (Steel Pipe) Length:
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020; JGJ/T 182-2009; GB 50086-2015
Grouting Density of Anchor Bolt (Steel Pipe):
JTG 3360-2020; JTG F80/1-2017; T/CECSG:J60-2020; JGJ/T 182-2009
Observation Inside and Outside Tunnel:
JTG/T 3660-2020; JTG 3370.1-2018; JTG/T 3374-2020; JTG/T D70-2010; GB 50911-2013; GB 50021-2001; Q/CR 9218-2015
Crown Settlement:
JTG/T 3660-2020; JTG/T 3374-2020; GB 50911-2013; DBJ50-107-2010; JGJ 8-2016; GB 50026-2020; Q/CR 9218-2015
Ground Settlement:
JTG/T 3660-2020; JTG/T 3374-2020; GB 50911-2013; DBJ50-107-2010; JGJ 8-2016; GB 50026-2020; Q/CR 9218-2015
Geological Observation:
JTG/T 3660-2020; JTG C20-2011; JTG 3370.1-2018; JTG/T D70-2010; JTG/T 3374-2020; GB 50021-2001; TB 10027-2022; TB 10038-2022; GB/T 50218-2014; Q/CR 9217-2015; JTG/T 3222-2020; TB 10013-2010
Forward Geological Conditions:
JTG/T 3660-2020; JTG C20-2011; JTG 3370.1-2018; JTG/T D70-2010; JTG/T 3374-2020; JTG/T 3222-2020; GB 50021-2001; TB 10027-2022; TB 10038-2022; GB/T 50218-2014; Q/CR 9217-2015; TB 10013-2023
Distribution and Nature of Unfavorable Geological Bodies:
JTG/T 3660-2020; JTG C20-2011; JTG 3370.1-2018; JTG/T D70-2010; JTG/T 3374-2020; JTG/T 3222-2020; GB 50021-2001; TB 10027-2022; TB 10038-2022; GB/T 50218-2014; Q/CR 9217-2015; TB 10013-2023
Waterproofing Layer Construction Quality (Seam Width, Lap Length, Fastener Spacing, Weld Tightness):
JTG/T 3660-2020; JTG F80/1-2017; JTG/T 3374-2020; T/CECSG:J60-2020
Internal Displacement of Surrounding Rock:
JTG 3360-2020; Q/CR 9218-2015; DBJ50-107-2010; GB 50911-2013
Anchor Bolt Axial Force:
JTG 3360-2020; DBJ50-107-2010; Q/CR 9218-2015; GB 50911-2013
Surrounding Rock Pressure and Pressure Between Two Support Layers:
JTG 3360-2020; DBJ50-107-2010; Q/CR 9218-2015; GB 50911-2013
Steel Support Internal Force:
JTG 3360-2020; DBJ50-107-2010; Q/CR 9218-2015; GB 50911-2013
Internal Stress of Support (Lining):
JTG 3360-2020; DBJ50-107-2010; Q/CR 9218-2015; GB 50911-2013
Seepage Water Pressure:
JTG 3360-2020; DBJ50-107-2010; Q/CR 9218-2015; GB 50911-2013
Water Flow Rate:
JTG 3360-2020; DBJ50-107-2010; Q/CR 9218-2015; T/CECS 55-2020
Groundwater Level:
JTG 3360-2020; GB 50021-2001(2009); JTG C20-2011; GB 50911-2013; DBJ50-107-2010; JGJ 111-2016; T/CECS 55-2020
Blasting Vibration:
JTG 3360-2020; GB 6722-2014; GB 50911-2013; DBJ50-107-2010; Q/CR 9218-2015
Illuminance:
JTG 3360-2020; JTG/T D70/2-01-2014; JTG 2182-2020; GB/T 18204.1-2013; GB/T 5700-2008
Noise:
JTG/T 3660-2020; GB 3096-2008; JTG 2182-2020; GB/T 18204.1-2013; GB/T 3222.2-2022; HJ 706-2014
Wind Speed (Tunnel):
JTG/T 3660-2020; JTG/T D70/2-02-2014; GB/T 35227-2017; GB/T 18204.1-2013
CO Concentration:
JTG/T 3660-2020; GBZ/T 300.37-2017; GBZ 159-2004; GBZ/T 206-2007; JTG/T D70/2-02-2014; GB/T 18204.2-2014
NO₂ Concentration:
JTG/T 3660-2020; GBZ/T 300.40-2017; GBZ 159-2004; JTG/T D70/2-02-2014; GBZ/T 206-2007
CO₂ Concentration:
JTG/T 3660-2020; GBZ/T 300.37-2017; GBZ 159-2004; GBZ/T 206-2007; JTG/T D70/2-02-2014; GB/T 18204.2-2014
SO₂ Concentration:
JTG/T 3660-2020; GBZ/T 300.49-2017; GBZ 159-2004; GBZ/T 206-2007; JTG/T D70/2-02-2014
O₂ Concentration:
JTG/T 3660-2020; GBZ/T 206-2007
NO Concentration:
JTG/T 3660-2020; GBZ/T 300.40-2017; GBZ 159-2004; GBZ/T 206-2007
Methane (Gas) Concentration:
JTG/T 3660-2020; JTG/T 3374-2020; GBZ/T 206-2007; TB 10120-2019
Hydrogen Sulfide Concentration:
JTG/T 3660-2020; GBZ 159-2004; GBZ/T 206-2007
Dust Concentration:
JTG/T 3660-2020; GB/T 35223-2017; JTG/T D70/2-02-2014; GB/T 26944.3-2011
Service Advantages
Possesses a Class A (top-level) highway engineering quality testing qualification, enabling it to undertake testing for various bridge structures nationwide.
Based in Chongqing as a core hub, its services radiate across multiple regions nationwide, accumulating extensive experience in highway engineering testing. It has served key projects such as the Gansu Pengda Expressway, Yunnan Xiangli Expressway, Chongqing Nanfu Expressway, Nandao Expressway, and Sichuan Suizi Expressway. Leveraging years of practice, it possesses highly efficient site laboratory management capabilities and robust testing techniques, ensuring project quality.
