Chinese standards (related to): 'TB 10025-2019'
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Code for design of retaining structures of railway earthworks
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TB 10025-2019
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| TB 10025-2006 | English | RFQ |
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Code for design on retaining structures of railway subgrade
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TB 10025-2006
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Code for design on retaining engineering structures of railway subgrade
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| Standard ID | TB 10025-2019 (TB10025-2019) | | Description (Translated English) | Code for design of retaining structures of railway earthworks | | Sector / Industry | Railway & Train Industry Standard | | Word Count Estimation | 150,168 | | Date of Issue | 2019-07-31 | | Date of Implementation | 2019-12-01 | | Older Standard (superseded by this standard) | TB 10025-2006 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 |
TB 10025-2019: PDF in English
TB 10025-2019
UDC
INDUSTRY STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
P TB 10025-2019
J 127-2019
Code for design of retaining structures of railway
earthworks
ISSUED ON: JULY 31, 2019
IMPLEMENTED ON: DECEMBER 01, 2019
Issued by: State Railway Administration
Table of Contents
Foreword ... 7
1 General ... 10
2 Terms and symbols ... 10
2.1 Terms ... 10
2.2 Symbol ... 13
3 Basic provisions ... 15
3.1 General provisions ... 15
3.2 Design requirements ... 17
3.3 Selection of retaining structure form ... 19
4 Design load ... 20
4.1 General provisions ... 20
4.2 Main force ... 21
4.3 Additional force ... 24
4.4 Special force... 25
5 Materials and properties ... 25
5.1 General provisions ... 25
5.2 Concrete, mortar rubble and cement mortar ... 26
5.3 Steel ... 27
5.4 Geosynthetics ... 27
5.5 Filler and geotechnical ... 28
6 Gravity retaining wall ... 29
6.1 General provisions ... 29
6.2 Design and calculation ... 30
6.3 Construction requirements ... 38
7 Cantilever and counterfort retaining wall ... 40
7.1 General provisions ... 40
7.2 Design and calculation ... 41
7.3 Construction requirements ... 47
8 Groove retaining wall ... 48
8.1 General provisions ... 48
8.2 Design and calculation ... 49
8.3 Construction requirements ... 55
9 Reinforced soil wall ... 56
9.1 General provisions ... 56
9.2 Design and calculation ... 57
9.3 Construction requirements ... 62
10 Soil nailing retaining wall ... 64
10.1 General provisions ... 64
10.2 Design and calculation ... 64
10.3 Construction requirements ... 69
11 Anchored wall ... 70
11.1 General provisions ... 70
11.2 Design and calculation ... 72
11.3 Construction requirements ... 77
12 Prestressed anchored cable ... 79
12.1 General provisions ... 79
12.2 Design and calculation ... 80
12.3 Construction requirements ... 84
13 Slide-resistant pile ... 87
13.1 General provisions ... 87
13.2 Design and calculation ... 89
13.3 Construction requirements ... 94
14 Pile-wall structure ... 95
14.1 General provisions ... 95
14.2 Design and calculation ... 97
14.3 Construction requirements ... 100
15 Gravity retaining wall on pile foundation and beam ... 101
15.1 General provisions ... 101
15.2 Design and calculation ... 101
15.3 Construction requirements ... 104
16 Composite pile structure ... 105
16.1 General provisions ... 105
16.2 Design and calculation ... 106
16.3 Construction requirements ... 109
17 Other structures ... 110
17.1 Gravity retaining wall with short relieving slab ... 110
17.2 Anchor slab wall ... 112
Appendix A Common types and applicable conditions of retaining structure 117
Appendix B Track and train loads above the formation surface ... 118
Appendix C Material performance parameters of structural members ... 121
Appendix D Basic bearing capacity of foundation ... 124
Appendix E Resistance design of reinforced concrete members ... 130
Appendix F Calculation of maximum crack width of rectangular pile reinforced
concrete flexural members ... 136
Appendix G Reference values of relevant parameters for design of groove
retaining wall ... 138
Appendix H Reference values of anti-pullout design parameters for anchor rods
and cables ... 139
Appendix J Anchor rod (cable) test ... 140
Appendix K Selection of prestressed anchor cable and design parameters 146
Appendix L Reference value of anchor pile’s foundation factor ... 149
Explanation of wording in this code ... 152
Code for design of retaining structures of railway
earthworks
1 General
1.0.1 This standard is formulated to unify the design technical criteria of the
retaining structures of railway earthworks, so that the design of the retaining
structure meets the requirements of safety, reliability, advanced technology,
reasonable economy and green environmental protection.
1.0.2 This code is applicable to the design of retaining structure of railway
earthworks and related projects.
1.0.3 The retaining structure of the railway earthwork shall be designed
according to track and train loads, engineering geology, hydrogeology,
environmental conditions.
1.0.4 The retaining structure design shall meet the requirements of safety,
applicability, durability.
1.0.5 The retaining structure for earthwork be well designed for connection with
bridge abutments, tunnel openings, catenary pillars, sound barrier foundations
and other projects.
1.0.6 Retaining structure’s design shall promote the use of safe and reliable
new technologies, new structures, new materials and new processes.
1.0.7 In addition to meeting this code, the design of the retaining structure shall
also comply with the relevant national standards.
2 Terms and symbols
2.1 Terms
2.1.1 Retaining structure
Structures which are used to support and strengthen the rock-soil body and
maintain its stability.
2.1.2 Gravity retaining wall
A retaining structure that resists the earth pressure and prevents the soil from
slumping by the weight of the wall. When there is a counterfort platform on
the back of the wall, it is called a counterfort retaining wall.
2.1.3 Cantilever retaining wall
A retaining structure which is composed of standing arm plate, a toe plate, a
heel plate, etc., which resists the earth pressure by the gravity of the wall body
and the soil body above the heel plate.
2.1.4 Counterfort retaining wall
A retaining structure which is composed of standing arm plate, a toe plate, a
heel plate, a buttress, etc., which resists the earth pressure by the gravity of the
wall body and the soil body above the heel plate.
2.1.5 Groove retaining wall
A retaining structure of U-shaped which is composed of side walls and a
baseplate, that withstands earth pressure, water pressure, buoyancy,
meanwhile prevents surface water or groundwater from infiltrating.
2.1.6 Reinforced soil wall
A retaining structure which is composed of wall system, reinforcement and filling
soil, which uses reinforcement and filling as a whole to resist the earth pressure.
2.1.7 Soil nailing retaining wall
A retaining structure which is composed of soil nails and wall panels, which
uses soil nails and the reinforced rock-soil together to form a composite
structure to resist the earth pressure.
2.1.8 Anchored wall
A retaining structure which is composed of a wall system and an anchor rod,
which maintains stability and resists earth pressure by the tension of the anchor
rod.
2.1.9 Prestressed anchored cables
Retaining structure by applying tension to the anchor cable to strengthen the
rock-soil body to reach a stable state or improve the internal stress of the
structure.
2.1.10 Slide-resistant pile
Laterally stressed piles resisting the lateral earth pressure above the anchoring
section or the sliding force of the landslide by the lateral foundation resistance
2.1.20 Total safety factor
The factor used in engineering structure design to reflect the overall safety of
the structure.
2.1.21 Total safety factor method
The method of engineering structure design by the use of the total safety factor.
2.1.22 Partial factor
In order to ensure that the design structure or component has the specified
reliability, the partial safety factor used in the design expression of the limit state
method, which is divided into the action partial factor and the resistance partial
factor.
2.1.23 Partial factor method of limit states
A method of structural design using partial factors.
2.1.24 Action
The force exerted on the retaining structure (direct action, also called load), or
the cause of the effect of external deformation or constrained deformation of
the structure (indirect action).
2.1.25 Resistance
The ability of a structure or component to withstand actions.
2.1.26 Bearing capacity of subgrade
Under the condition of ensuring the stability of the foundation, the bearing
capacity of foundation which does not make the structure produce beyond the
allowable settlement or deformation.
2.2 Symbol
P0 - Track load;
Q - Train load;
q - Unit load;
λ0 - Static earth pressure factor;
λa - Active earth pressure factor;
embankment’s stability is affected by water erosion.
6 In sections where it requires saving land, occupying less farm-land or
protecting important existing buildings.
7 In sections where it requires protecting the ecological environment.
8 In sections where it has needs such as stations and scenic spots.
3.1.2 The section where the retaining structure is set up shall be identified with
engineering geology, hydrogeological conditions, environmental conditions and
physical and mechanical properties of rock-soil.
3.1.3 In the curved section, the plane layout of the shoulder’s retaining wall shall
meet the requirement of widening the fo......
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