1General Provisions
1. 0. 1 The purpose of these Specifications is to provide standard for the seismic design of highwaytunnels, enhances the capability to reduce damage to highway tunnels due to earthquake. Inaddition to this it also enables the highway transportation network to better fulfill its functions andplay its role in earthquake relief.
1.0.2 These Specifications are applicable to seismic design of highway tunnels with variousclasses and types.
1.0.3Seismic fortification and support categories, standards and objectives shall be based on theimportance of highway tunnels and the difficulty of repairs ( emergency repair).
1.0.4 For seismic design of highway tumnels that are site-specific, seismic safety evaluation.ground motion parameters, seismic fortification and support intensity established in the approvedreport shall be adopted. For seismic design of highway tunnels to which no seismic safetyevaluation has been performed yet, then ground motion parameters given on the current SeismicGround Motion Parameters Zonation Map of China (GB 18306)shall be employed.
2Terms and Symbols
2.1 Terms
2.1.1Seismic ground motion
Vibration of surface and near-surface media caused by an earthquake.
2.1.2Seismic ground motion parameters
The physical parameters of seismic ground moton characterizing seismic design requirements .including seismic peak groundacceleration.velocity,displacement and characteristic period ofresponse spectra.
2.1.3 Seismic ground motion parameter zonation
The territory is divided into zones with different seismic design requirements according to seismicground motion parameters.
3Basic Requirements
3.1Seismic fortification category and standard
3.1.1Seismic fortification category shal! be established according to highway classes and tunnelimportance, as shown in Table 3. 1.1. For tunnels that are cfitical to economy or national defense ,or conducive to earthquake relief and maintaining an unbloeked lifeline, their seismic fortificationcategories should be appropriately raised.
Table
3.1.1
Seismic fortification category for highway tunnels
1General Provisions
2 Terms and Symbols
2.1 Terms
2.2 Symbols
3.1 Seismic fortification category and standard
3.2 Earthquake effect
3.3 Seismic design process
4Tunnel Site , Site and Ground
4.1 General requirements
4.2 Tunnel site and site
Ground
Soil fiquefaction and soft ground
Earthquake Effect
5.1 General requirements
5.2 Horizontal earthquake effect
5.3 Vertical earthquake effect
5.4 Design ground motion time histories
Calculation Method
6.1General requirements
6.2 Calculation requirements
7aterials and Parameters
8Seismie Check
8.1General requirements
8.2 Strength checking
8.3 Deformation checking
8.4Seismic check for portal wall and retaining wall8.5 Checking of stability against buoyancy
Drill-and-Blast Tunnels
9.1General requirements
9.2Seismic response calculation
9.3Seismic check
9.4 Lining seismic measures
9.5Seismic design of special tunnel structures
Shield Tunnels
10.1 General requirements
10,2Seismic response catculatión
Seismic check
Seismic measures
Standard
JTG 2232-2019 Code for seismic design of highway tunnels (English Version)
1General Provisions
1. 0. 1 The purpose of these Specifications is to provide standard for the seismic design of highwaytunnels, enhances the capability to reduce damage to highway tunnels due to earthquake. Inaddition to this it also enables the highway transportation network to better fulfill its functions andplay its role in earthquake relief.
1.0.2 These Specifications are applicable to seismic design of highway tunnels with variousclasses and types.
1.0.3Seismic fortification and support categories, standards and objectives shall be based on theimportance of highway tunnels and the difficulty of repairs ( emergency repair).
1.0.4 For seismic design of highway tumnels that are site-specific, seismic safety evaluation.ground motion parameters, seismic fortification and support intensity established in the approvedreport shall be adopted. For seismic design of highway tunnels to which no seismic safetyevaluation has been performed yet, then ground motion parameters given on the current SeismicGround Motion Parameters Zonation Map of China (GB 18306)shall be employed.
2Terms and Symbols
2.1 Terms
2.1.1Seismic ground motion
Vibration of surface and near-surface media caused by an earthquake.
2.1.2Seismic ground motion parameters
The physical parameters of seismic ground moton characterizing seismic design requirements .including seismic peak groundacceleration.velocity,displacement and characteristic period ofresponse spectra.
2.1.3 Seismic ground motion parameter zonation
The territory is divided into zones with different seismic design requirements according to seismicground motion parameters.
3Basic Requirements
3.1Seismic fortification category and standard
3.1.1Seismic fortification category shal! be established according to highway classes and tunnelimportance, as shown in Table 3. 1.1. For tunnels that are cfitical to economy or national defense ,or conducive to earthquake relief and maintaining an unbloeked lifeline, their seismic fortificationcategories should be appropriately raised.
Table
3.1.1
Seismic fortification category for highway tunnels
Contents of JTG 2232-2019
1General Provisions
2 Terms and Symbols
2.1 Terms
2.2 Symbols
3.1 Seismic fortification category and standard
3.2 Earthquake effect
3.3 Seismic design process
4Tunnel Site , Site and Ground
4.1 General requirements
4.2 Tunnel site and site
Ground
Soil fiquefaction and soft ground
Earthquake Effect
5.1 General requirements
5.2 Horizontal earthquake effect
5.3 Vertical earthquake effect
5.4 Design ground motion time histories
Calculation Method
6.1General requirements
6.2 Calculation requirements
7aterials and Parameters
8Seismie Check
8.1General requirements
8.2 Strength checking
8.3 Deformation checking
8.4Seismic check for portal wall and retaining wall8.5 Checking of stability against buoyancy
Drill-and-Blast Tunnels
9.1General requirements
9.2Seismic response calculation
9.3Seismic check
9.4 Lining seismic measures
9.5Seismic design of special tunnel structures
Shield Tunnels
10.1 General requirements
10,2Seismic response catculatión
Seismic check
Seismic measures
