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GB/T 50123-2019: Standard for geotechnical testing method
Status: Valid
GB/T 50123: Evolution and historical versions
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Standard for geotechnical testing method
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| GB/T 50123-1999 | English | 190 |
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[GB/T 50123-2006 Edition, re-confirmed 2008] Standard for soil test method
| Obsolete |
Standard similar to GB/T 50123-2019
GB 50202 | GB 50206 | GB 50005 | GB/T 27880 | GB 50497 | Basic data
| Standard ID | GB/T 50123-2019 (GB/T50123-2019) |
| Description (Translated English) | Standard for geotechnical testing method |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | P22 |
| Classification of International Standard | 93.020 |
| Word Count Estimation | 512,510 |
| Date of Issue | 2019 |
| Date of Implementation | 2019-10-01 |
| Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation |
GB/T 50123-1999: [GB/T 50123-2006 Edition, re-confirmed 2008] Standard for soil test method
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT50123-1999
NATIONAL STANDARD
Standard for Soil Test Method
Table of Contents
General Provisions... 1
2 Terminology and Symbols ... 2
2 1 Terminology... 2
2 2 Symbols... 3
3 Sample Preparation and Saturation ... 6
3 .1 Sample Preparation ... 6
3 2 Saturation of Specimens ... 9
4 Water Content Test ...12
5 Density Test... 14
5.1 Cutting Ring Method ... 14
5.2 Wax Seal Method ... 14
5.3 Water Filling Method ... 15
5.4 Sand Filling 此1ethod ... 16
6 Specific Gravity Test of Soil Grain ... 20
6.1 General Rules ... 20
6.2 Gravity Bottle Method ...20
6.3 Hydrometer ... 22
6.4 Siphon Cylinder ... 23
7 Particle Analysis Test... 25
7.1 Sieve Analysis Method ... 25
7.2 Densimeter Method ... 28
7.3 Pipette 孔1ethod ... 33
8 Limit Water Content Test ...-...36
8.1 Liquid and Plastic Limit Combination Testing Method ... 36
8.3 Rolling & Rubbing Method Plastic Limit Test... 39
8.4 Shrinkage Limit Test by 肌1ethod of Shrinkage Apparatus .. 40
9 Relative Density Test of Sand ...42
9.1 General Rules ...42
9.2 Minimum Dry Density Test of Sand ... 42
10 Compaction Test...46
11 Load Bearing Ratio Test ... 50
12 Elastic Recovery Modulus Test... 55
12.1 Method of Using Lever Pressiometer... 55
12.2 Method of Using Intensity Meter ... 57
13 Penetration Test ... 59
13.1 General Stipulations ... 59
13 .2 Constant Head Penetration Test... 60
13.3 Varying Head Penetration Test... 62
14 Consohdatton Test ... 64
14.1 Standard Consolidation Test ... 64
14.2 Continual Loading Test under Strain Control ... 69
15 Loess Hydrocompaction Test... 74
15.1 General Stipulations ... 74
15.2 Hydrocompaction Coefficient Test ... 74
15.3 Dead-weight Hydrocompaction Coefficient Test... 75
15.4 Lixiviation Deformation Coefficient Test ... 76
15.5 Initial Hydrocompaction Pressure Te创...76
16 Triaxial Compression Test... 78
16.1 General Stipulations ... 78
16.2 Instrument and Equipment ... 78
16.3 Test Specimen Preparation and Saturation ... 80
16.4 Unconsolidated and Undrained Shear Test... 83
16. 5 Consolidated and Undrained Shear Test... 85
16.6 Consolidated and Drained Shear Test ... 89
16.7 Multi-stage Loading Test for One Specimen ... 90
17 No Lateral Limit Compressive Strength Test ... 93
18 Direct Shear Test ... 96
18. l Slow Shear Test... 96
18.2 Consolidated Quick Shear Test... 98
18.3 Quick Shear Test ... 99
18.4 Direct Shear Test for Sand Soil ... 99
19 Repeated Direct Shear Strength Test ... 101
20 Free Swelling Ratio Test ... 104
21 Swelling Ratio Test... 106
21.1 Loading Swelling Ratio Test... 106
21.2 Unloaded Expansivity Test... 107
22 Expansive Force Test ...,... 108
23 Shrinkage Test... 109
24 Frozen Soil Density Test...-... 112
24.1 General Requirements ... 112
24.2 Floating 沁1easurement Method ... 112
24.3 Integral Testing Method ... 113
24.4 Cutting Ring Method ... 115
24.5 Sand-filling Method ... 116
25 Freezing Temperature Test ... 119
26 Unfrozen-water Content Test... 121
27 Frozen Soil Thermal Conductivity Test... 122
28 Heaving Test ... 124
29 Frozen Soil Thaw Compression Test...-... 127
29.1 General Requirements... 127
29.2 Indoor Frozen Soil Thaw Compression Test... 127
29.3 Thaw Compression Test ... 130
30 Acidity and Alkalinity Test... 133
31 Eutectic Salt Tests ... 135
31.1 Preparation of Leach liquor ... 135
31.2 Determination of Total Eutectic Salt Content... 135
31.3 Determination of Carbonate Radical and Heavy Carbonate Radical ... 137
31.4 Determination of Chloridate Radical ... 139
31.5 Determination of Sulfate Radical ... 141
31.6 Determination of Sulfate Radical... 144
31.7 Determination of Calcium Ion ... 145
31.8 Determination of Magnesium Ion ... 147
31.9 Determination of Calcium Ion and Magnesium Ion by Atomic Absorption Spectral
Luminosity ... 148
31.10 Determination of Sodium Ion and Lalium Ion ... 150
32 Medium Dissolvable Salt (Gyps) Test ...-... 153
33 Hard Dissolvable Salt (Calcium Carbonate) Test... 156
34 Organic Matter Test ...ι ... 160
35 Centrifugal Test for Moisture Equivalent of Soil ... 162
Appendix A Test Data Compilation and Test Report ... 164
Appendix B Soil Sample Requirements and Management... 167
Appendix C General Requirements on Indoor Soil Test Apparatus ... 169
Appendix D All Testing Record Sheets ... 171
Explanation of Wording in This Standard ... 206
1 General Provisions
1.0.1 This standard is developed with a view to measure the basic engineering properties of soil
and unify the test methods, thus providing reliable parameters for engineering and construction.
1.0.2 This standard applies for the testing of basic engineering properties of foundation soil and
building soil in various construction projects such as industrial and civil building, irrigation works
and transportation.
1.0.3 In this standard, soil is only classified into two categories. course-grained soil and fine-
grained soil. The designations of soil shall be determined in accordance with the current national
standard “ Standard for Classification of Soil” GBJ 145.
1.0.4 The sorting out of soil test data shall be such that by means of assessing the soil mass unit
characteristics and the law of their change based on the research on the samples (data measured
during the tests), the results of soil tests will serve as accurate and reliable indexes of soil properties
for the engineering design and construction. Analysis and sorting out of test results shall be
conducted in accordance with Appendix A.
1.0.5 Instruments and equipment used in soil tests shall be in compliance with GB/T 1506
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