GB 50290-1998 Technical specification for application of geosynthetics
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50290—98
Technical standard for applications of geosynthetics
1998-12-22
State Administration of Quality and Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
1999-01-01
Jointly issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Technical standard for applications of geosynthetics
Technical standard for applicationsofgeosynthetics
GB50290—98
Editing department: Ministry of Water Resources of the People's Republic of ChinaApproving department: Ministry of Construction of the People's Republic of ChinaEffective date: January 1, 1999
1998Beijing
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Notice on Issuing the National Standard
"Technical Specification for Application of Geosynthetics"
Jianbiao [1998] No. 260
In accordance with the requirements of our Ministry's "Notice on Issuing the 1998 National Standard Formulation and Revision Plan (Second Batch) for Engineering Construction" (Jianbiao [1998] No. 244), the "Technical Specification for Application of Geosynthetics" jointly formulated by the Ministry of Water Resources and relevant departments has been reviewed and approved as a mandatory national standard by relevant departments, with the number GB50290—98, and will be implemented on January 1, 1999.
This specification is managed by the Ministry of Water Resources, interpreted by the Ministry of Water Resources Water Resources and Hydropower Planning and Design Institute, and published by the China Planning Press organized by the Standard and Norms Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
December 22, 1998
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
The national standard "Technical Specifications for the Application of Geosynthetics" is to implement the important instructions of the leaders of the State Council on the application of geosynthetics. According to the requirements of the Ministry of Construction's Construction Standards (1998) No. 13 document, the Ministry of Water Resources is responsible for the main editing, and the Ministry of Water Resources Water Resources and Hydropower Specifications Design Institute jointly compiled and completed the work with the Beijing Graduate School of North China Institute of Water Resources and other units. The specification was passed by the National Review Conference in December 1998, approved by the Ministry of Construction's Construction Standards [1998] No. 260 document, and jointly issued by the Ministry of Construction and the State Administration of Quality and Technical Supervision.
During the formulation of the Technical Specification for Application of Geosynthetics, the compilation team conducted extensive investigations and research and collected data, summarizing the experience of my country's geosynthetics in engineering application practice, and proposed technical requirements for the application of geosynthetics from the aspects of filtration, drainage, anti-seepage, reinforcement, protection, etc., which will play an important role in promoting the application of geosynthetics and ensuring the quality of geosynthetics in engineering. This specification is managed by the Ministry of Water Resources, and the Ministry of Water Resources Water Resources and Hydropower Planning and Design Institute is responsible for the specific interpretation. In the process of implementing the specification, please combine the engineering practice and carefully summarize the experience. If you find that there is a need for modification and supplementation, please send your opinions and suggestions to the Ministry of Water Resources Water Resources and Hydropower Planning and Design Institute (address: Beijing Liupukang, postal code: 100011) for reference in future revisions. The main editor of this specification: the Ministry of Water Resources Water Resources and Hydropower Planning and Design Institute. Participating units: Beijing Graduate School of North China Institute of Water Resources and Hydropower, China Synthetic Materials Engineering Association, Tianjin Port Engineering Research Institute of the Ministry of Communications, Railway Research Institute, Civil Aviation Airport Design Institute, Chongqing Highway Research Institute of the Ministry of Communications, Nanjing Fiberglass Research and Design Institute, Planning and Development Department of the State Textile Administration, etc. Main drafters: Wang Zhenghong, Dong Zaizhi, Yang Canwen, Wang Yuren, Zeng Xiting, Zhong Liang, Deng Weidong, Liu Congning, Wu Chun, Dou Ruzhen, etc. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2Terms and Symbols
..． Terminology
2.2 Symbols...
Basic provisions
3.1 Materials.
3.2 Design principles
3.3 Construction inspection
Filtering and drainage
Stock provisions
Filtering criteriawwW.bzxz.Net
Design methods
Construction requirements
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Design and construction of drainage belts in soft soil foundation treatment
General provisions
Anti-seepage structure
Design and construction of engineering anti-seepage ·
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Reinforced Earth Retaining Wall Design
Reinforced Earth Cushion Design and Construction
Reinforced Earth Slope Design and Construction......
General Provisions
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Soft Anti-scouring
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Engineering Construction Standard full text information system
Geotextile bag slope protection
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7.4 Geotextile mat vegetation slope protection
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Prevention and treatment of reflective cracks in road surface and pavement
Other protective works
Specification Explanation of terms and phrases
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1.0.1 This specification is formulated to promote the application of geosynthetics in engineering construction, unify the technical requirements for design, construction, acceptance, etc., ensure the quality of the project, and achieve advanced technology, economic rationality, safety and applicability.
2 This specification applies to the design, construction and acceptance of geosynthetics used in water conservancy, railway, highway, water transport, construction and other projects. 1.0.3 In addition to complying with the provisions of this specification, the design and construction of geosynthetics shall also comply with the provisions of the current national mandatory standards and specifications. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2 Terms and Symbols
2.1 Terms
2.1.1 Geosynthetics
geosynthetics
General term for geotextiles, geomembranes, geocomposites, and geotechnical special materials used in engineering construction.
2 Geotextiles
geotextiles
Permeable geosynthetics. According to different manufacturing methods, they are divided into woven geotextiles and nonwoven (non-woven) geotextiles.
2.1.3 Woven geotextiles wovengeotextiles Geotextiles woven by fiber yarns or filaments arranged in a certain direction. 2.1.4 Nonwoven geotextiles nonwovengeotextiles Fabrics made of thin pads made of short fibers or filaments arranged randomly or in a directional manner, mechanically bonded, thermally bonded or chemically bonded.
2.1.5Geomembrane
A relatively impermeable film made of polymer or asphalt. 2.1.6Geogrid
An engineering synthetic material for reinforcement formed by regular mesh tensile strips. Its openings allow the surrounding soil, stone or other geotechnical materials to penetrate. 2.1.7Geobelt
A tensile strip material made by extrusion, stretching or re-reinforcement. 3Geocell
A honeycomb or grid-like three-dimensional structural material composed of geogrids, geotextiles or geomembranes, and strips.
2.1.9 Geonet
geonet
A geosynthetic material composed of parallel ribs bonded to the same ribs above at different angles and used for flat drainage and exhaust. 2.1.10 Geofabriform
Continuous or individual bag-like materials made of double-layer chemical fiber fabrics. Concrete or cement mortar is filled in it, and after solidification, it forms a plate-like protective block. 2.1.11 Geosyntheticfibermattress A three-dimensional structure made of thermoplastic resin. Its bottom is the base layer, covered with a foamed and bulky net bag, which is filled with sphagnum and grass seeds for plant growth. 2.1.13 Geocomposite A geosynthetic material composed of two or more materials. 2.1.14 Strip geodrain A composite drainage material consisting of a synthetic core material with different concave and convex cross-sectional shapes and continuous drainage grooves, and wrapped with non-woven geotextiles. 2.1.15 Geotextile bentonite pad geosynthetic clay liner (GCL) is a waterproof material made of bentonite or other low permeability materials wrapped between geotextiles or geomembranes, and bonded by needle punching, stitching or chemical bonding. 2.1.16 Expanded polystyrene sheet (EPS) is a light plate made of polystyrene expanded by adding foaming agent and then molded or extruded. 2.1.17 Glass fiber mesh glass grid
is a mesh product made of glass fiber as raw material, through textile processing and surface post-treatment.
2.1.18 Filtration
keeps soil particles under osmotic pressure from flowing while allowing liquid to pass through. 2.1.19 Separation
prevents adjacent different media from mixing.
2.1.20 Reinforcement
uses the tensile properties of geosynthetics to improve the mechanical properties of soil. 2.1.21 Protection
Limit or prevent the rock and soil from being damaged by the external environment. 2.1.22 Ultimate tensile strength Ultimate tensile strength Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
The maximum tensile force when the material sample is damaged under the action of slowly increasing uniform uniaxial tension.
2.1.23 Elongation
The ratio of the elongation of the material sample under uniaxial tension to the original length. 2.1.24 Coefficient of vertical permeability Coefficient of permeability in the direction perpendicular to the plane of the geotextile. 2.1.25 Coefficient of planar permeability Coefficient of permeability in the direction parallel to the plane of the geotextile. 2.1.26 Permittivity
The seepage rate of geotextiles in the normal direction of the fabric per unit area and unit water head under laminar flow conditions.
2.1.27 Transmissivity
The permeability of a single width of a geotextile per unit head under laminar flow. 2.1.28 Equivalent opening size (EOS) The maximum apparent pore size of a geotextile.
2.1.29 Gradient ratio
In the siltation test, the ratio of the hydraulic gradient when water flows through the geotextile and the 25 mm thick soil material above it to the hydraulic gradient when water flows through the 50 mm thick soil material above it. 2.2 Symbols
A—Coefficient
Ar——Reinforcement coverage
B, b—Coefficient, width
d85——Characteristic particle size of soil
dw—Equivalent well diameter
F. Safety factor
f——Friction coefficient
H——Height
i—Hydraulic gradient
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K. ——Active earth pressure coefficient
K. ——Static earth pressure coefficient
-Permeability coefficient of geotextile
—Permeability coefficient of soil
-Length
-Sliding moment
Equivalent aperture of geotextile
-Horizontal spacing
-Vertical spacing
-Ultimate tensile strength measured by tensile test of reinforcement material Design allowable tensile strength
-Thickness
——Hydraulic conductivity
——Horizontal stress
o——Vertical stress
Engineering construction standard Full-text information system
Engineering construction standard full-text information system
3 Basic provisions
3.1 Materials
The classification of geosynthetics should meet the following requirements: 3.1.1
【Geotextiles
【Woven (including knitting)
（Knitting
【Needle punching
Thermal bonding
Non-woven
（Non-woven chemical bonding
Geomembrane
Geosynthetics
（Composite geomembrane||t t||Geosynthetics
Geocomposite materials
Composite drainage and waterproofing materials: drainage belts, drainage pipes, drainage and waterproofing materials, etc.
(geogrids, geobelts, geocells, geonets, geonet bags, geonet mats, geotextiles, bentonite geotechnical special materials
(mats (GCL), polystyrene plates (EPS, etc.) 2 The performance indicators of geosynthetics should include the following contents, and the test items should be determined according to the engineering design needs:
1 Physical properties: Unit Area mass, thickness (and its relationship with normal pressure), material specific gravity, pore size, etc.
2 Mechanical properties: strip stretching, grip stretching, tearing, bursting, CBR bursting, puncture, direct shear friction, pull-out friction, creep, etc. 3 Hydraulic properties: vertical permeability, plane permeability, clogging, waterproofness, etc.
Durability: UV resistance, chemical stability and biological stability, etc. 4
The test of design indicators should simulate the actual conditions of the project and analyze the engineering construction standard information system25 Coefficient of planar permeability Coefficient of permeability parallel to the plane of geotextile. 2.1.26 Permittivity
The amount of seepage in the normal direction of the fabric per unit area and unit head of geotextile under laminar flow.
2.1.27 Transmissivity
The amount of seepage per unit width of geotextile under laminar flow per unit head. 2.1.28 Equivalent opening size (EOS) The maximum apparent pore size of geotextile.
2.1.29 Gradient ratio
In the siltation test, the ratio of the hydraulic gradient when water flows through the geotextile and the 25 mm thick soil material above it to the hydraulic gradient when water flows through the 50 mm thick soil material above it. 2.2 Symbol
A—coefficient
Ar——reinforcement coverage
B, b—coefficient, width
d85—characteristic particle size of soil
dw—equivalent well diameter
F. Safety factor
f—friction coefficient
H—height
i—hydraulic gradient
Engineering 4 Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
K. ——active earth pressure coefficient
K. ——Static earth pressure coefficient
-Permeability coefficient of geotextile
-Permeability coefficient of soil
-Length
-Sliding moment
Equivalent aperture of geotextile
-Horizontal spacing
-Vertical spacing
-Ultimate tensile strength measured by tensile test of reinforcement material Design allowable tensile strength
-Thickness
-Water conductivity
-Horizontal stress
o-Vertical stress
Engineering construction standard Full-text information system
Engineering construction standard full-text information system
3 Basic provisions
3.1 Materials
The classification of geosynthetics should meet the following requirements: 3.1.1
【Geotextiles
【Woven (including knitting)
（Knitting
【Needle punching
Thermal bonding
Non-woven
（Non-woven chemical bonding
Geomembrane
Geosynthetics
（Composite geomembrane||t t||Geosynthetics
Geocomposite materials
Composite drainage and waterproofing materials: drainage belts, drainage pipes, drainage and waterproofing materials, etc.
(geogrids, geobelts, geocells, geonets, geonet bags, geonet mats, geotextiles, bentonite geotechnical special materials
(mats (GCL), polystyrene plates (EPS, etc.) 2 The performance indicators of geosynthetics should include the following contents, and the test items should be determined according to the engineering design needs:
1 Physical properties: Unit Area mass, thickness (and its relationship with normal pressure), material specific gravity, pore size, etc.
2 Mechanical properties: strip stretching, grip stretching, tearing, bursting, CBR bursting, puncture, direct shear friction, pull-out friction, creep, etc. 3 Hydraulic properties: vertical permeability, plane permeability, clogging, waterproofness, etc.
Durability: UV resistance, chemical stability and biological stability, etc. 4
The test of design indicators should simulate the actual conditions of the project and analyze the engineering construction standard information system25 Coefficient of planar permeability Coefficient of permeability parallel to the plane of geotextile. 2.1.26 Permittivity
The amount of seepage in the normal direction of the fabric per unit area and unit head of geotextile under laminar flow.
2.1.27 Transmissivity
The amount of seepage per unit width of geotextile under laminar flow per unit head. 2.1.28 Equivalent opening size (EOS) The maximum apparent pore size of geotextile.
2.1.29 Gradient ratio
In the siltation test, the ratio of the hydraulic gradient when water flows through the geotextile and the 25 mm thick soil material above it to the hydraulic gradient when water flows through the 50 mm thick soil material above it. 2.2 Symbol
A—coefficient
Ar——reinforcement coverage
B, b—coefficient, width
d85—characteristic particle size of soil
dw—equivalent well diameter
F. Safety factor
f—friction coefficient
H—height
i—hydraulic gradient
Engineering 4 Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
K. ——active earth pressure coefficient
K. ——Static earth pressure coefficient
-Permeability coefficient of geotextile
-Permeability coefficient of soil
-Length
-Sliding moment
Equivalent aperture of geotextile
-Horizontal spacing
-Vertical spacing
-Ultimate tensile strength measured by tensile test of reinforcement material Design allowable tensile strength
-Thickness
-Water conductivity
-Horizontal stress
o-Vertical stress
Engineering construction standard Full-text information system
Engineering construction standard full-text information system
3 Basic provisions
3.1 Materials
The classification of geosynthetics should meet the following requirements: 3.1.1
【Geotextiles
【Woven (including knitting)
（Knitting
【Needle punching
Thermal bonding
Non-woven
（Non-woven chemical bonding
Geomembrane
Geosynthetics
（Composite geomembrane||t t||Geosynthetics
Geocomposite materials
Composite drainage and waterproofing materials: drainage belts, drainage pipes, drainage and waterproofing materials, etc.
(geogrids, geobelts, geocells, geonets, geonet bags, geonet mats, geotextiles, bentonite geotechnical special materials
(mats (GCL), polystyrene plates (EPS, etc.) 2 The performance indicators of geosynthetics should include the following contents, and the test items should be determined according to the engineering design needs:
1 Physical properties: Unit Area mass, thickness (and its relationship with normal pressure), material specific gravity, pore size, etc.
2 Mechanical properties: strip stretching, grip stretching, tearing, bursting, CBR bursting, puncture, direct shear friction, pull-out friction, creep, etc. 3 Hydraulic properties: vertical permeability, plane permeability, clogging, waterproofness, etc.
Durability: UV resistance, chemical stability and biological stability, etc. 4
The test of design indicators should simulate the actual conditions of the project and analyze the engineering construction standard information system
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