gb 50202-2002 建筑地基基礎工程施工質量驗收規(guī)范(英文)

1、<p><b>　　UDC</b></p><p>　　National Standard of the People's Republic of China</p><p>　　P GB 50202-2002</p><p

2、>　　建筑地基基礎工程施工質量驗收規(guī)范</p><p>　　Code for Acceptance of Construction Quality</p><p>　　of Building Foundation</p><p>　　Issued on April 1 2002 Executed on M

3、ay 1 2002</p><p>　　Jointly Promulgated by the Ministry of Construction and the State General Administration for Quality Supervision and Inspection and Quarantine of the People's Republic of China</p&g

4、t;<p>　　National Standard of the People's Republic of China</p><p>　　建筑地基基礎工程施工質量驗收規(guī)范</p><p>　　Code for Acceptance of Construction Quality </p><p>　　of Building Foundatio

5、n</p><p>　　GB 50202-2002</p><p>　　Compiled by: Construction and Management Commission of Shanghai Municipality</p><p>　　Approved by: Ministry of Construction of the P.R.C.</p>

6、<p>　　Executed on: May 1 2002</p><p>　　Chinese Planning Press</p><p>　　2002 Beijing</p><p>　　National Standard of the People's Republic of China</p><p>　　Cod

7、e for Acceptance of Construction Quality of Building Foundation</p><p>　　GB 50202-2002</p><p>　　Compiled by Construction and Management Commission of Shanghai Municipality</p><p>　　

8、Published by Chinese Planning Press</p><p>　　(Address: 4/F, Block C, Guohong Mansion Jia 11, Muxudi Beili, Xicheng District, Beijing)</p><p>　　(Zip code: 100038 Tel: 63906413 63906416)</p&g

9、t;<p>　　Distributed by Beijing branch of Xinhua Bookstore</p><p>　　Printed by World Knowledge Printing House</p><p>　　850x1168mm 1/32 2.75 printed sheets 67 thousand Chinese characters&

10、lt;/p><p>　　First published in April 2002 Second printed in June 2002</p><p>　　Number 150001-190000 volumes</p><p>　　Unified Book No.: 1580058482</p><p>　　Price: RMB15.00

11、</p><p>　　Notice on Issuing the National Standard of</p><p>　　the Code for Acceptance of Construction Quality of Building Foundation</p><p>　　J.B. [2002] NO. 79</p><p>

12、　　Pursuant to the Notice on the Printing and Distribution of the Preparation and Modification Plans of 1997's Engineering Construction Standards (J.B. [1997] NO.108), this Code for Acceptance of Construction Quality

13、of Building Foundation is rectified jointly by the Construction and Management Commission of Shanghai Municipality and other relevant departments. Our ministry has arranged for the examination by related departments of t

14、he Code and hereby approved it as a national standard with the ser</p><p>　　This Code shall be governed by the Ministry of Construction of the P.R.C., and interpreted by the Ministry with respect of the comp

15、ulsory articles hereof and by Shanghai Foundation Engineering Company with respect of the technical details hereof, and published and distributed by Chinese Planning Press under the organization of the standard quota ins

16、titute of the Ministry of Construction of the P.R.C.</p><p>　　Ministry of Construction of the P.R.C.</p><p>　　April 1 2002</p><p>　　Supporting compilers: Foundation Institute of Chi

17、na Academy of Building Research</p><p>　　Design institute of NO.3 Harbouring Bureau of CHEC</p><p>　　Comprehensive survey research and design institute</p><p>　　under the Ministry o

18、f Construction</p><p>　　Tongji University</p><p>　　Chief drafters: Gui Yekun Ye Borong Wu Chunlin Li Yaogang Li Yaoliang </p><p>　　Chen Xiquan Gao Hongxing Guo Shutai Miao Ju

19、nfa </p><p>　　Li Kangjun Qiu Shizhong Qian Jianming Liu Delin</p><p>　　Table of Contents</p><p>　　1 General Rules1</p><p>　　2 Terms2</p><p>　　3 Ba

20、sic Regulations4</p><p>　　4 Foundation5</p><p>　　4.1 General Terms5</p><p>　　4.2 Soil-lime Foundation6</p><p>　　4.3 Sand-sandstone Foundation6</p><p

21、>　　4.4 Geosynthetics Foundation7</p><p>　　4.5 Flyash Foundation8</p><p>　　4.6 Dynamic Consolidation Foundation9</p><p>　　4.7 Grouting Foundation9</p><p>　　4.

22、8 Preloading Foundation11</p><p>　　4.9 Vibration Impact Foundation12</p><p>　　4.10 Jet Grouting Foundation12</p><p>　　4.11 Soil-cement Mixed Pile Foundation13</p><

23、;p>　　4.12 Soil-lime Compacted Column Composite Foundation14</p><p>　　4.13 Cement Flyash Gravel Pile Composite Foundation15</p><p>　　4.14 Tamping Soil-cement Pile Composite Foundation16&

24、lt;/p><p>　　4.15 Sand Pile Foundation17</p><p>　　5 Pile Foundation19</p><p>　　5.1 General Terms19</p><p>　　5.2 Static Force Pressing-in Piles21</p><p>

25、;　　5.3 Pre-tensioned Pre-stressing Tube Pile22</p><p>　　5.4 Precast Concrete Pile23</p><p>　　5.5 Steel Pile25</p><p>　　5.6 Cast-in-place Concrete Pile27</p><p>

26、　　6 Earthwork29</p><p>　　6.1 General Terms29</p><p>　　6.2 Excavation of Earthwork29</p><p>　　6.3 Backfilling of Earth31</p><p>　　7 Foundation Pit32</p>

27、<p>　　7.1 General Terms32</p><p>　　7.2 Row-pile Wall Timbering33</p><p>　　7.3 Soil-cement Pile Wall Timbering34</p><p>　　7.4 Bolting and Soil-nailed Wall Support35<

28、/p><p>　　7.5 Steel or Concrete Support System35</p><p>　　7.6 Underground Diaphragm Wall36</p><p>　　7.7 Sunk Well and Caisson38</p><p>　　7.8 Water Lowering and Drain

29、age42</p><p>　　8 Quality Acceptance of Divisional (Sub-divisional) Work44</p><p>　　Schedule A Key Point for the Survey of Ground and Foundation45</p><p>　　Schedule B Performan

30、ce of Plastic Drainage Belts48</p><p>　　Explanation for Usage of Words in the Standard49</p><p>　　1 General Rules</p><p>　　1.0.1 For the purpose of enhancing supervision and man

31、agement over engineering quality and unifying acceptance rules on construction quality of building foundations so as to ensure engineering quality, this Code is hereby made as follows.</p><p>　　1.0.2 This C

32、ode shall be applicable to the quality acceptance of foundations in building works</p><p>　　1.0.3 Requirements stipulated in any of the engineering technical documents and contracts that are adopted for fou

33、ndation construction shall at least attain the stipulations set forth hereof.</p><p>　　1.0.4 This Code shall be used in cooperation with the Unified Standard for Quality Acceptance of Building Engineering G

34、B 50300 that is currently in force and effective</p><p>　　1.0.5 Acceptance of the quality of building foundations shall, in addition to this Code, comply with other related national codes and standards that

35、 are currently in force and effective.</p><p><b>　　2 Terms</b></p><p>　　2.0.1 Geosynthetics foundation</p><p>　　A building foundation that is formed by covering geosyn

36、thetics with soil (or sands), where geosynthetics may be one or more than one layer. Generally speaking, this method is suitable for shallow foundations.</p><p>　　2.0.2 Heavy tamping foundation</p>&

37、lt;p>　　Under this circumstance, a free falling heavy tamper will be utilized to tamp soil-covering shallow foundations to form a uniformly hardened surface layer to bear the load upon. When punching, the tamper's

38、drop height shall be much bigger than the foundation to be tamped.</p><p>　　2.0.3 Dynamic consolidation foundation</p><p>　　As regards this term, the process is similar to that for heavy tampin

39、g foundations, except that the tamper's drop height in this case must be much bigger than that for heavy tamping foundation.</p><p>　　2.0.4 Grouting foundation</p><p>　　In this case, the pr

40、epared chemical or cement grout will be infused through conduits into the holes of the soil body, and integrated with the body so as to increase the body's strength and reduce its compressibility and permeability.<

41、;/p><p>　　2.0.5 Preloading foundation</p><p>　　Impose a load on the undisturbed soil to extrude the water contained, so as to realize the pre-consolidation of soil and reduce the building foundati

42、on’s late subsidence and increase the foundation’s bearing capacity. There are three methods for the making of preloading foundations, namely, heaped preloading, vacuum preloading and precipitation preloading.</p>

43、<p>　　2.0.6 Jet grouting foundation</p><p>　　As for this foundation, a driller will be utilized to directly bring a grout hose with jet nozzle into the predetermined position under the soil layer, or

44、put the hose at the predetermined position after drilling a hole. Then, the grout or water will be driven by high pressure to spray out of the jet nozzle. The whirly spayed grout will integrate with the soil to form a co

45、nsolidated body. The process of only utilizing a single hose to spay grout is called “one-pipe method”, that of utilizing two</p><p>　　2.0.7 Soil-cement mixed pile foundation</p><p>　　Utilize t

46、he cement as the solidifying agent and, by a blending machine, mix the cement with the foundation’s soil, and the hardened mixture will form this foundation.</p><p>　　2.0.8 Soil-lime compacted column</p&

47、gt;<p>　　Drill holes in the undisturbed soil, fill in plain soil or lime by layers, tamp them, and make them compact to make the surrounding soil body compact so as to a solid foundation.</p><p>　　2.0

48、.9 Cement fly-ash gravel pile</p><p>　　After utilizing a driller with long twist bits to drill holes or making holes with a sunken tube pile machine, and fill by a pump or through a charging hopper the mixt

49、ure of cement, fly ash and reduced stone into holes to form compact and solid foundations.</p><p>　　2.0.10 Pressed pile by anchor rod</p><p>　　This pile sinking technology utilizes an anchor ro

50、d to press the pile into the soil gradually, where the anchor can use a vertical soil anchor, or a ground anchor that is temporarily anchored in concrete sub-slab or pile cap. </p><p>　　3 Basic Regulations&

51、lt;/p><p>　　3.0.1 Prior to the construction of building foundations, complete geological survey details and the information of structure about surrounding pipelines, buildings, structures and other utilities m

52、ust be prepared. When necessary, construction surveys and examination shall be carried out so as to ensure the foundation’s quality and the safety of nearby buildings. Key points about the construction survey refer to Sc

53、hedule A.</p><p>　　3.0.2 Construction units must owns corresponding professional qualifications and shall established improved quality control and inspection systems.</p><p>　　3.0.3 Unit engag

54、ed in the inspection of building foundations and tests for certification must acquire the qualification certificates issued by the provincial and above (including the provincial, autonomous region, municipal authority) c

55、ompetent construction authority and certificates for qualified inspection units issued by competent inspection authority.</p><p>　　3.0.4 As a divisional work, foundations, if necessary, may be further divid

56、ed into a number of sub-divisional work pursuant to the Unified Standard for Quality Acceptance of Buildings Engineering GB 50300 currently in force.</p><p>　　3.0.5 In the event that abnormal conditions occ

57、urred in the course of construction, the construction shall immediately be stopped. Construction supervision and management companies or owners shall invite survey, design and construction units to jointly analyze the co

58、nditions so as to solve the problems existed, eliminate hidden quality shortages and detail them in writing.</p><p>　　4 Foundation</p><p>　　4.1 General Terms</p><p>　　4.1.1 The f

59、ollowing materials shall be prepared for the construction of building foundations:</p><p>　　Geotechnical engineering survey materials.</p><p>　　Type, allocation and structure quality of surround

60、ing buildings and underground facilities.</p><p>　　Engineering design drawings, design requirements and the standards required to attain, and means of inspection.</p><p>　　4.1.2 The quality, te

61、sting items, batch quantity and inspection methods of raw materials, such as sands, pebble, cement, steel material, lime and fly ash, shall comply with relevant national standards currently in force.</p><p>

62、　　4.1.3 After the foundation’s construction is completed, quality acceptance should be proceeded in a period of inactivity, which is determined by design requirements.</p><p>　　4.1.4 Foundation improvement

63、 works shall go through a testing phase before the beginning of formal construction so as to verify predetermined construction parameters and improving effects. In load tests for verifying the effects of improvement, the

64、 imposed load shall not be smaller than two times of that of the design value.</p><p>　　4.1.5 As regards the lime-soil foundation, sand and sandstone foundation, geosynthetics foundation, fly ash foundation

65、, dynamic consolidation foundation, grouting foundation, and preloading foundation, the construction results (foundation strength or bearing capacity) must attain the level in design requirements. In terms of the number

66、of inspection, at least three points are required for every unit project. At the same time, at least one point shall be inspected every 100m2 for a project with </p><p>　　4.1.6 As regards the soil-cement mi

67、xed pile foundation, jet grouting foundation, sand pile foundation, vibration-punching pile composite foundation, soil-lime compacted column composite foundation, cement fly ash gravel pile foundation and soil-cement tam

68、ping pile composite foundation, the number of inspection of bearing capacity shall be 0.5%-1% of the total but not less than three places. If the inspection of single pile strength is required, the inspection number shal

69、l be 0.5%-1% of the tota</p><p>　　4.1.7 With the exception of the main control items set forth in the articles of 4.1.5 and 4.1.6 of this Code, other main control and common items may be inspected randomly.

70、 However, among the composite foundations, soil-cement mixed pile, jet grouting pile, vibration-punching pile, soil-lime compacted column, cement flyash and tamping soil-cement pile shall be randomly inspected based on a

71、 percentage of 20%.</p><p>　　4.2 Soil-lime Foundation</p><p>　　4.2.1 Soil, lime or cement (when the lime element is replaced with cement) and their mixing ratio shall be in line with design re

72、quirements. Soil-lime shall be uniformly mixed.</p><p>　　4.2.2 In the course of construction, the thickness of various layers, overlap length of the upper and lower layers of sections, water quantity for ta

73、mping, number of tamping and compacting coefficient shall be examined and measured.</p><p>　　4.2.3 After the completion of construction, the soil-lime foundation’s bearing capacity shall be inspected.</p

74、><p>　　4.2.4 The Quality inspection standard for soil-lime foundations shall comply with Table 4.2.4.</p><p>　　Table 4.2.4 Quality inspection standard for soil-lime foundations</p><p&g

75、t;　　4.3 Sand-sandstone Foundation</p><p>　　4.3.1 Raw materials including sand and sandstone shall meet the design requirements for quality and mixing ratio, and shall be uniformly mixed.</p><p&g

76、t;　　4.3.2 During the course of construction, the thickness of layers and the overlap length in sections, water quantity for tamping, number of tamping and compacting coefficient must be examined and measured.</p>

77、<p>　　4.3.3 After the completion of construction, the sand-sandstone foundation’s bearing capacity shall be measured.</p><p>　　4.3.4 The Quality inspection standard for sand-sandstone foundations shal

78、l comply with Table 4.3.4.</p><p>　　Table 4.3.4 Quality inspection standard for sand-sandstone foundations</p><p>　　4.4 Geosynthetics Foundation</p><p>　　4.4.1 Before the constru

79、ction, the physical property (including the quality, thickness and specific gravity of unit area), strength, ratio of elongation of geosynthetics must be inspected and measured, so do the soil and sand-sandstone. Geosynt

80、hetics shall be inspected on a batch basis, with 5% for every batch.</p><p>　　4.4.2 In the course of construction, stripping, laying thickness and flatness of backfill, laying direction of geosynthetics, ov

81、erlap length or condition of joints, connection between the structure and geosynthetics, etc. must be checked.</p><p>　　4.4.3 After the completion of construction, the geosynthetics foundation’s bearing capa

82、city shall be measured.</p><p>　　4.3.4 The Quality inspection standard for geosynthetics foundations shall comply with Table 4.4.4.</p><p>　　Table 4.4.4 Quality inspection standard for geosynt

83、hetics foundations</p><p>　　4.5 Flyash Foundation</p><p>　　4.5.1 Before the construction, inspection shall be carried out for flyash, the foundation trench’s bottom cleaning-up condition, and

84、geological condition.</p><p>　　4.5.2 In the course of construction, inspect the laying thickness, number of rolling, control of water content, rolling extent of overlapping part, compacting coefficient, etc

85、.</p><p>　　4.5.3 After the completion of construction, the flyash foundation’s bearing capacity shall be measured.</p><p>　　4.5.4 The Quality inspection standard for flyash foundations shall c

86、omply with Table 4.5.4.</p><p>　　Table 4.3.4 Quality inspection standard for flyash foundations</p><p>　　Table 4.5.4 (continued)</p><p>　　4.6 Dynamic Consolidation Foundation</

87、p><p>　　4.6.1 Before the construction, inspection shall be carried out for rammer’s weight and size, means of controlling the drop height, water discharging facilities and soil texture of the foundation to be

88、tamped.</p><p>　　4.6.2 In the course of construction, inspect the drop height, number of pounding, and pounding position and scope.</p><p>　　4.6.3 After the completion of construction, inspect

89、 the dynamic consolidation foundation’s strength and bearing capacity.</p><p>　　4.6.4 The Quality inspection standard for dynamic consolidation foundations shall comply with Table 4.6.4.</p><p>

90、;　　Table 4.6.4 Quality inspection standard for dynamic consolidation foundations</p><p>　　4.7 Grouting Foundation</p><p>　　4.7.1 Before the beginning of construction, relevant technical docum

91、ents (with respect to the position of grouting points, mixing ratio of grout, technical parameters for grouting, inspection requirements, etc.) shall be prepared. The property of the grout’s elements shall comply with de

92、sign requirements, and the grouting equipment shall operate normally.</p><p>　　4.7.2 In the course of construction, the grout’s mixing ratio and main specifications, sequence of grouting, pressure control o

93、f grouting shall be frequently regularly checked.</p><p>　　4.7.3 After the completion of construction, inspect the grouted body’s strength, bearing capacity, etc. The number of inspected holes shall be equa

94、l to 2%-5% of the total. In the event that the unapproved rate is bigger or equal to 20%, second grouting shall be carried out. Inspection shall be proceeded 15 days (for sandy soil or loess) or 60 days (for clay) after

95、the grouting.</p><p>　　4.7.4 The Quality inspection standard for grouting foundations shall be in line with Table 4.7.4.</p><p>　　Table 4.7.4 Quality inspection standard for grouting foundatio

96、ns</p><p>　　4.8 Preloading Foundation</p><p>　　4.8.1 Before the construction, examination shall be made for primary data, including monitoring measures of construction, subsidence and water pr

97、essure of holes, and the position of water discharging facilities, sand drain (including bag sand drain), plastic drainage belts. The quality standard for plastic drainage belts shall comply with the stipulations of Sche

98、dule B hereof.</p><p>　　4.8.2 As regards heaping construction, the heaping height and rate of subsidence shall be measured. In the course of vacuum preloading construction, inspect the diaphragm seal’s sea

99、ling performance and the vacuum meter’s readouts, etc.</p><p>　　4.8.3 After the completion of construction, inspect the preloading foundation’s strength and other physic mechanical properties as required. A

100、 bearing capacity inspection must be carried out for important building foundations.</p><p>　　4.8.4 Quality inspection standard for preloading foundations and plastic drainage belts shall comply with Table

101、4.8.4.</p><p>　　Table 4.8.4 Quality inspection standards for</p><p>　　preloading foundations and plastic drainage belts</p><p>　　4.9 Vibration Impact Foundation</p><p&g

102、t;　　4.9.1 Before the construction, inspect the vibration impactor’s property, the accuracy of current and voltage meters, and the property of filling.</p><p>　　4.9.2 During the construction, the densificat

103、ion current, water supply pressure and quantity, filling quantity, the holding time of vibration at the hole’s bottom, vibration impact position, construction parameters of vibration impactor (, etc. shall be examined, o