标准编号:	GB 50202-2018
中文名称:	建筑地基工程施工质量验收标准
英文名称:	Standard for acceptance of construction quality of building foundation
行业分类:	GB    国家标准
发布机构:	中华人民共和国住房和城乡建设部
发布日期:	2018-03-16
实施日期:	2018-10-1
标准状态:	现行
替代旧标准:	GB 50202-2002 建筑地基基础工程施工质量验收规范
翻译语言:	英文
文件格式:	PDF
中文字符数:	80000 字
翻译价格(元):	6825.00 元
交付时间:	付款后 1 个工作日

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.



In accordance with the requirements of Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2012 (JIANBIAO [2012] No. 5) issued by the Ministry of Housing and Urban-Rural Development, the drafting group of this standard has revised GB 50202-2002 Code for acceptance of construction quality of building foundation through the extensive investigation and study, careful summarization of practical experience and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.



The newly revised standard is divided into 10 clauses and 1 annex, with main technical contents covering: general provisions, terms, basic requirements, ground engineering, foundation engineering, special soil foundation engineering, excavation protection engineering, groundwater control, earthwork, slope engineering, etc.



The main technical contents revised in this standard are: 1. the arrangement of clauses is adjusted; 2. terms of specific foundation names in the former standard are deleted while terms concerned with acceptance are added; 3. the basic requirements for acceptance are improved; the information submitted for acceptance and the procedures, contents and evaluation criteria of acceptance are added; 4. the vibro-replacement foundation and sand pile foundation are combined into stone column composite foundation; 5. acceptance requirements for non-reinforced spread foundation, reinforced concrete spread foundation, raft and box foundations, anchor foundation, etc. are added; 6. acceptance requirements for foundation pit supporting combining secant pile wall, soil reinforcement and main structure are added; 7. acceptance requirements for special foundation engineering are added; 8. acceptance requirements for groundwater control and slope engineering are added; 9. requirements for ground inspecting points are added; 10. requirements inconsistent with specific acceptance contents in the former standard are deleted.



The provisions printed in bold type in this standard are compulsory and must be enforced strictly.



Ministry of Housing and Urban-Rural Development is in charge of the administration of this standard and the explanation of the compulsory provisions; Shanghai Foundation Engineering Group Co., Ltd. is responsible for the explanation of specific technical contents. Any comment or suggestion, during the process of implementing this standard, shall be posted to Shanghai Foundation Engineering Group Co., Ltd. (Address: No. 406, Middle Jiangxi Road, Shanghai; 200002).





Contents



Foreword i

1 General provisions 1

2 Terms 1

3 Basic requirements 2

4 Ground engineering 3

4.1 General requirements 3

4.2 Soil and lime-soil foundation 4

4.3 Sand and sandstone foundation 5

4.4 Geosynthetics foundation 6

4.5 Flyash foundation 7

4.6 Dynamic consolidation foundation 8

4.7 Grouting consolidated foundation 9

4.8 Preloading ground 10

4.9 Stone column composite foundation 11

4.10 Jet grouting composite foundation 13

4.11 Cement-soil mixing pile composite foundation 14

4.12 Soil-lime compacted pile composite foundation 15

4.13 Cement flyash and gravel pile composite foundation 17

4.14 Tamping soil-cement pile composite foundation 18

5 Foundation engineering 19

5.1 General requirements 19

5.2 Non-reinforced spread foundation 21

5.3 Reinforced concrete spread foundation 22

5.4 Raft and box foundations 23

5.5 Reinforced concrete precast pile 24

5.6 Cast-in-situ pile with mud protection wall 26

5.7 Dry drilling cast-in-situ pile 28

5.8 Long spiral drill hole grouting pile 31

5.9 Driven cast-in-situ pile 31

5.10 Steel pile 32

5.11 Static press anchored pile 34

5.12 Foundation on rock-anchor system 36

5.13 Sunk well and caisson 36

6 Special soil foundation engineering 39

6.1 General requirements 39

6.2 Collapsible loess 39

6.3 Frozen soil 43

6.4 Expansive soil 47

6.5 Saline soil 48

7 Foundation pit supporting engineering 49

7.1 General requirements 49

7.2 Contiguous bored pile wall 50

7.3 Sheet pile wall 56

7.4 Secant pile wall 58

7.5 Soil mixed wall 59

7.6 Soil nailing wall 60

7.7 Diaphragm wall 62

7.8 Gravity cement-soil wall 66

7.9 Soil reinforcement 67

7.10 Strut 68

7.11 Anchor 70

7.12 Foundation pit support combined with main structure 71

8 Groundwater control 72

8.1 General requirements 72

8.2 Dewatering and drainage galleries 73

8.3 Recharge 78

9 Earthwork 79

9.1 General requirements 79

9.2 Excavation of earthwork 80

9.3 Excavation of rock foundation pit 82

9.4 Earthwork stacking and transport 84

9.5 Backfilling of earthwork 86

10 Slope engineering 88

10.1 General requirements 88

10.2 Bolt-shotcrete support 88

10.3 Retaining walls 90

10.4 Slope excavation 91

Annex A Ground inspecting of foundation 93

Explanation of wording in this standard 97

List of quoted standards 98





Standard for acceptance of construction quality of building foundation



1 General provisions



1.0.1 This standard is formulated with a view to strengthening the construction quality management, unifying the acceptance of construction quality and ensuring the construction quality of building foundation.



1.0.2 This standard is applicable to the acceptance of construction quality of building foundation.



1.0.3 The acceptance of construction quality of building foundation shall meet the requirements stipulated in this standard and those in relevant current national standards.



2 Terms



2.0.1 inspection

activity in which the characteristics and performance of an item are measured, inspected and tested, and the results are compared with the requirements of the design and standard so as to determine the conformity of each performance



activity in which the building materials, components, equipment and appliances, after entering the construction site, shall be sampled from the construction site for laboratory inspection according to relevant requirements, provided that they meet the requirements of appearance quality inspection and quality certification document verification



2.0.2 acceptance

activity of confirming the conformity of engineering quality in written form according to the design document and relevant standards, upon passing the self-inspection by the construction organization



2.0.3 dominant item

inspection item dominating the quality, safety, energy conservation, environmental protection and main use functions of building engineering



2.0.4 general item

inspection item other than the dominant item



2.0.5 ground inspecting

activity of inspecting the conformity of ground after the foundation pit or foundation trench is excavated to the design bottom elevation



3 Basic requirements



3.3.1 Acceptance of construction quality of building foundation shall meet the following requirements:



1 Construction quality of foundation shall meet the acceptance requirements;



2 Quality acceptance procedures shall meet the acceptance requirements;



3 Engineering quality acceptance shall be conducted upon passing the self-inspection by the construction organization;



4 Quality acceptance shall be carried out for sub-section and sub-item works;



5 Quality acceptance shall be carried out for dominant items and general items.



3.0.2 The following information shall be submitted during the acceptance of foundation work:



1 Geotechnical engineering investigation report;



2 Design documents, joint review records of drawings and technical disclosure materials;



3 Engineering survey, positioning and setting-out records;



4 Construction organization’s design and special construction scheme;



5 Construction records and construction organization’s self-inspection assessment report;



6 Monitoring data;



7 Acceptance data of concealed work;



8 Testing and inspection report;



9 As-built drawings.



3.0.3 Inspection items implemented before and during construction shall be tabulated, and then recorded, checked and filed accordingly.



3.0.4 The foundation work must be subjected to ground inspecting, of which, the inspecting points shall meet the requirements of Annex A.



3.0.5 All quality inspection results of dominant items must comply with inspection criteria, while the acceptance rate of general items shall not be less than 80%.



3.0.6 The inspection quantity shall be subjected to sampling by inspection batches in accordance with corresponding clause (if any) in this standard while subjected to sampling inspection by inspection batches where there are no corresponding clauses in this standard. Division and sampling inspection quantity of inspection batches may be implemented in accordance with the requirements of GB 50300 Unified standard for constructional quality acceptance of building engineering.



3.0.7 Where the strength assessment of standard test piece of foundation does not meet relevant requirements, or the representativeness of the test piece is doubtful, such test piece shall be subjected to strength testing, and may be accepted if the testing result conforms to design requirements.



3.0.8 Quality inspection for raw materials shall meet the following requirements:



1 Quality inspection of raw materials such as steel bar and concrete shall meet the requirements of design and GB 50204 Code for acceptance of constructional quality of concrete structures;



2 The approaching, welding or connection testing of raw materials and finished products such as steels, welding materials and connecting pieces shall meet the requirements of design and GB 50205 Code for acceptance of construction quality of steel structures.



3 The quality, inspection items, batches and inspection methods of raw materials such as admixtures and additives like sand, stone, cement, lime, flyash and ore (steel) slag powder shall comply with the relevant current national standard.



4 Ground engineering



4.1 General requirements



4.1.1 Quality acceptance of ground engineering should be carried out upon completion and after the interim period of construction; wherein, the interim period shall meet the requirements of design and the relevant current national standard.



4.1.2 The dimension of plate adopted for flat plate static load test shall be determined according to the requirements of design and relevant standard. The area of plate adopted for static load test on soil and lime-soil foundation, sand and sandstone foundation, geosynthetics foundation, flyash foundation, grouting consolidated foundation and preloading foundation should not be less than 1.0m2, while that adopted for static load test on dynamic consolidation foundation should not be less than 2.0m2. The dimension of plate adopted for static load test on composite foundation shall be determined according to the design replacement rate.



4.1.3 Upon the bearing capacity inspection of foundation, the maximum loading capacity for static load test shall not be less than twice the characteristic value required by the design.



4.1.4 The bearing capacity of soil and lime-soil foundation, sand and sandstone foundation, geosynthetics foundation, flyash foundation, dynamic consolidation foundation, grouting consolidated foundation and preloading foundation must meet the design requirements. For bearing capacity inspection of foundation, at least 1 point shall be inspected per 300m2, and at least 1 point shall be inspected per 500m2 in the area beyond 3000m2. At least 3 points shall be inspected for each unit work.



4.1.5 The bearing capacity of composite foundation such as stone column, jet grouting pile, cement-soil mixing pile, soil and lime-soil compacted pile, cement, flyash and gravel pile and rammed soil-cement pile must meet the design requirements. For the bearing capacity inspection of composite foundation, at least 0.5% of the total number of piles (not less than 3 points) shall be inspected. In case of any inspection requirement for single pile bearing capacity or pile shaft strength, at least 0.5% of the total number of piles (not less than 3 pieces) shall be inspected.



4.1.6 Items other than those specified in 4.1.4 and 4.1.5 shall be sampled by inspection batches. For the reinforcement of composite foundation, at least 20% of the total number shall be inspected.



4.1.7 For acceptance of foundation treatment work, where the result obtained by one inspection method is uncertain, other inspection methods shall also be adopted for comprehensive judgment.



4.2 Soil and lime-soil foundation



4.2.1 Prior to construction, the mix ratio of soil, lime-soil, lime or cement and the mixing uniformity of lime-soil shall be inspected.



4.2.2 During construction, the thickness of paved layer, the water quantity added for compaction, the compaction passes and the compaction coefficient shall be inspected.



4.2.3 On completion of construction, bearing capacity inspection shall be carried out for foundation.



4.2.4 The quality inspection criteria for soil and lime-soil foundation shall meet the requirements of Table 4.2.4.



Table 4.2.4 Quality inspection criteria for soil and lime-soil foundation

Item S.N. Inspection item Permissible value or permissible deviation Inspection method

Unit Value

Dominant item 1 Foundation bearing capacity ≥ design value Static load test

2 Mix ratio Design value Checking the volume ratio during mixing

3 Compaction coefficient ≥ design value Cutting ring method

General item 1 Lime particle size mm ≤5 Sieving analysis method

2 Organic content in soil % ≤5 Ignition loss method

3 Soil particle size mm ≤15 Sieving analysis method

4 Moisture content Optimum moisture content ± 2% Oven drying method

5 Layer thickness mm ±50 Measuring with a level gauge



4.3 Sand and sandstone foundation



4.3.1 Prior to construction, the quality, mix ratio and uniformity of raw materials such as sand and stone shall be inspected.



4.3.2 During construction, the layer thickness as well as the compaction condition, water quantity added, compaction passes and compaction coefficient of the overlapped part in section construction shall be inspected.



4.3.3 On completion of construction, bearing capacity inspection shall be carried out for ground.



4.3.4 The quality inspection criteria for sand and sandstone foundation shall meet the requirements of Table 4.3.4.

Foreword i
1 General provisions
2 Terms
3 Basic requirements
4 Ground engineering
4.1 General requirements
4.2 Soil and lime-soil foundation
4.3 Sand and sandstone foundation
4.4 Geosynthetics foundation
4.5 Flyash foundation
4.6 Dynamic consolidation foundation
4.7 Grouting consolidated foundation
4.8 Preloading ground
4.9 Stone column composite foundation
4.10 Jet grouting composite foundation
4.11 Cement-soil mixing pile composite foundation
4.12 Soil-lime compacted column composite foundation
4.13 Cement flyash and gravel pile composite foundation
4.14 Tamping soil-cement pile composite foundation
5 Foundation engineering
5.1 General requirements
5.2 Non-reinforced spread foundation
5.3 Reinforced concrete spread foundation
5.4 Raft and box foundations
5.5 Reinforced concrete precast pile
5.6 Cast-in-situ pile with mud protection wall
5.7 Dry drilling cast-in-situ pile
5.8 Long spiral drill hole grouting pile
5.9 Driven cast-in-situ pile
5.10 Steel pile
5.11 Anchor pile
5.12 Foundation on rock-anchor system
5.13 Sunk well and caisson
6 Special soil foundation engineering
6.1 General requirements
6.2 Collapsible loess
6.3 Frozen soil
6.4 Expansive soil
6.5 Saline soil
7 Foundation pit supporting engineering
7.1 General requirements
7.2 Contiguous bored pile wall
7.3 Sheet pile wall
7.4 Secant pile wall
7.5 Soil mixed wall
7.6 Soil nailing wall
7.7 Diaphragm wall
7.8 Gravity cement-soil wall
7.9 Soil reinforcement
7.10 Strut
7.11 Anchor
7.12 Foundation pit support combined with main structure
8 Groundwater control
8.1 General requirements
8.2 Dewatering and drainage galleries
8.3 Recharge
9 Earthwork
9.1 General requirements
9.2 Excavation of earthwork
9.3 Excavation of rock foundation pit
9.4 Earthwork stacking and transport
9.5 Backfilling of earthwork
10 Slope engineering
10.1 General requirements
10.2 Bolt-shotcrete support
10.3 Retaining walls
10.4 Slope excavation
Annex A Ground inspecting of foundation
Explanation of wording in this standard
List of quoted standards

1 总 则
1.0.1 为加强建筑地基基础工程施工质量管理，统一建筑地基基础工程施工质量的验收，保证工程施工质量，制定本标准。
1.0.2本标准适用于建筑地基基础工程施工质量的验收。
1.0.3建筑地基基础工程施工质量验收除应符合本标准外，尚应符合国家现行有关标准的规定。
2 术 语
2.0.1 检验 inspection
对项目的特征、性能进行量测、检查、试验等，并将结果与设计和标准规定的要求进行比较，以确定项目每项性能是否符合要求的活动。
建筑材料、构配件、设备及器具等进入施工现场后，在外观质量检查和质量证明文件核查符合要求的基础上，按照有关规定从施工现场抽取试样送至试验室进行检验的活动。
2.0.2 验收 acceptance
在施工单位自行检查合格的基础上，根据设计文件和相关标准以书面形式对工程质量是否达到合格标准作出确认的活动。
2.0.3 主控项目dominant item
建筑工程中对质量、安全、节能、环境保护和主要使用功能起决定性作用的检验项目。
2.0.4 一般项目 general item
除主控项目以外的检验项目。
2.0.5 验槽 ground inspecting
基坑或基槽开挖至坑底设计标高后，检验地基是否符合要求的活动。
3 基本规定
3.0.1 地基基础工程施工质量验收应符合下列规定：
1 地基基础工程施工质量应符合验收规定的要求；
2 质量验收的程序应符合验收规定的要求；
3工程质量的验收应在施工单位自行检查评定合格的基础上进行；
4质量验收应进行分部、分项工程验收；
5 质量验收应按主控项目和一般项目验收。
3.0.2 地基基础工程验收时应提交下列资料：
1 岩土工程勘察报告；
2设计文件、图纸会审记录和技术交底资料；
3 工程测量、定位放线记录；
4施工组织设计及专项施工方案；
5 施工记录及施工单位自查评定报告；
6 监测资料；
7 隐蔽工程验收资料；
8检测与检验报告；
9 竣工图。
3.0.3 施工前及施工过程中所进行的检验项目应制作表格，并应做相应记录、校审存档。
3.0.4 地基基础工程必须进行验槽，验槽检验要点应符合本标准附录A的规定。
3.0.5 主控项目的质量检验结果必须全部符合检验标准，一般项目的验收合格率不得低于80％。
3.0.6 检查数量应按检验批抽样，当本标准有具体规定时，应按相应条款执行，无规定时应按检验批抽检。检验批的划分和检验批抽检数量可按照现行国家标准《建筑工程施工质量验收统一标准》GB 50300的规定执行。
3.0.7 地基基础标准试件强度评定不满足要求或对试件的代表性有怀疑时，应对实体进行强度检测，当检测结果符合设计要求时，可按合格验收。
3.0.8原材料的质量检验应符合下列规定：
1 钢筋、混凝土等原材料的质量检验应符合设计要求和现行国家标准《混凝土结构工程施工质量验收规范》GB 50204的规定；
2钢材、焊接材料和连接件等原材料及成品的进场、焊接或连接检测应符合设计要求和现行国家标准《钢结构工程施工质量验收规范》GB 50205的规定；
3 砂、石子、水泥、石灰、粉煤灰、矿(钢)渣粉等掺合料、外加剂等原材料的质量、检验项目、批量和检验方法，应符合国家现行有关标准的规定。
4地基工程
4.1一般规定
4.1.1 地基工程的质量验收宜在施工完成并在间歇期后进行，间歇期应符合国家现行标准的有关规定和设计要求。
4.1.2平板静载试验采用的压板尺寸应按设计或有关标准确定。素土和灰土地基、砂和砂石地基、土工合成材料地基、粉煤灰地基、注浆地基、预压地基的静载试验的压板面积不宜小于1.0m2；强夯地基静载试验的压板面积不宜小于2.0m2。复合地基静载试验的压板尺寸应根据设计置换率计算确定。
4.1.3地基承载力检验时，静载试验最大加载量不应小于设计要求的承载力特征值的2倍。
4.1.4 素土和灰土地基、砂和砂石地基、土工合成材料地基、粉煤灰地基、强夯地基、注浆地基、预压地基的承载力必须达到设计要求。地基承载力的检验数量每300m2不应少于1点，超过3000m2部分每500m2不应少于1点。每单位工程不应少于3点。
4.1.5 砂石桩、高压喷射注浆桩、水泥土搅拌桩、土和灰土挤密桩、水泥粉煤灰碎石桩、夯实水泥土桩等复合地基的承载力必须达到设计要求。复合地基承载力的检验数量不应少于总桩数的0.5％，且不应少于3点。有单桩承载力或桩身强度检验要求时，检验数量不应少于总桩数的0.5％，且不应少于3根。
4.1.6 除本标准第4.1.4条和第4.1.5条指定的项目外，其他项目可按检验批抽样。复合地基中增强体的检验数量不应少于总数的20％。
4.1.7地基处理工程的验收，当采用一种检验方法检测结果存在不确定性时，应结合其他检验方法进行综合判断。
4.2素土、灰土地基
4.2.1 施工前应检查素土、灰土土料、石灰或水泥等配合比及灰土的拌合均匀性。
4.2.2 施工中应检查分层铺设的厚度、夯实时的加水量、夯压遍数及压实系数。
4.2.3 施工结束后，应进行地基承载力检验。
4.2.4 素土、灰土地基的质量检验标准应符合表4.2.4的规定。
表4.2.4 素土、灰土地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项
目 1 地基承载力 不小于设计值 静载试验
2 配合比 设计值 检查拌和时的体积比
3 压实系数 不小于设计值 环刀法
一
般
项
目 1 石灰粒径 mm ≤5 筛析法
2 土料有机质含量 ％ ≤5 灼烧减量法
3 土颗粒粒径 mm ≤15 筛析法
4 含水量 最优含水量±2％ 烘干法
5 分层厚度 mm ±50 水准测量

4.3 砂和砂石地基
4.3.1 施工前应检查砂、石等原材料质量和配合比及砂、石拌和的均匀性。
4.3.2 施工中应检查分层厚度、分段施工时搭接部分的压实情况、加水量、压实遍数、压实系数。
4.3.3 施工结束后，应进行地基承载力检验。
4.3.4砂和砂石地基的质量检验标准应符合表4.3.4的规定。
表4.3.4砂和砂石地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项
目 1 地基承载力 不小于设计值 静载试验
2 配合比 设计值 检查拌和时的体积比或重量比
3 压实系数 不小于设计值 灌砂法、灌水法
一
般
项
目 1 砂石料有机质含量 ％ ≤5 灼烧减量法
2 砂石料含泥量 ％ ≤5 水洗法
3 砂石料粒径 mm ≤50 筛析法
4 分层厚度 mm ±50 水准测量

4.4土工合成材料地基
4.4.1 施工前应检查土工合成材料的单位面积质量、厚度、比重、强度、延伸率以及土、砂石料质量等。土工合成材料以100m2为一批，每批应抽查5％。
4.4.2 施工中应检查基槽清底状况、回填料铺设厚度及平整度、土工合成材料的铺设方向、接缝搭接长度或缝接状况、土工合成材料与结构的连接状况等。
4.4.3施工结束后，应进行地基承载力检验。
4.4.4 土工合成材料地基质量检验标准应符合表4.4.4的规定。
表4.4.4 土工合成材料地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项
目 1 地基承载力 不小于设计值 静载试验
2 土工合成材料强度 ％ ≥-5 拉伸试验(结果与设计值相比)
3 土工合成材料延伸率 ％ ≥-3 拉伸试验(结果与设计值相比)
一
般
项
目 1 土工合成材料搭接长度 mm ≥300 用钢尺量
2 土石料有机质含量 ％ ≤5 灼烧减量法
3 层面平整度 mm ±20 用2m靠尺
4 分层厚度 mm ±25 水准测量

4.5粉煤灰地基
4.5.1 施工前应检查粉煤灰材料质量。
4.5.2施工中应检查分层厚度、碾压遍数、施工含水量控制、搭接区碾压程度、压实系数等。
4.5.3 施工结束后，应进行承载力检验。
4.5.4 粉煤灰地基质量检验标准应符合表4.5.4的规定。
表4.5.4粉煤灰地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项
目 1 地基承载力 不小于设计值 静载试验
2 压实系数 不小于设计值 环刀法
一
般
项
目 1 粉煤灰粒径 mm 0.001～2.000 筛析法、密度计法
2 氧化铝及二氧化硅含量 ％ ≥70 试验室试验
3 烧失量 ％ ≤12 灼烧减量法
4 分层厚度 mm ±50 水准测量
5 含水量 最优含水量±4％ 烘干法

4.6强夯地基
4.6.1 施工前应检查夯锤质量和尺寸、落距控制方法、排水设施及被夯地基的土质。
4.6.2 施工中应检查夯锤落距、夯点位置、夯击范围、夯击击数、夯击遍数、每击夯沉量、最后两击的平均夯沉量、总夯沉量和夯点施工起止时间等。
4.6.3施工结束后，应进行地基承载力、地基土的强度、变形指标及其他设计要求指标检验。
4.6.4强夯地基质量检验标准应符合表4.6.4的规定。
表4.6.4 强夯地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项目 1 地基承载力 不小于设计值 静载试验
2 处理后地基土的强度 不小于设计值 原位测试
3 变形指标 设计值 原位测试
一
般
项
目 1 夯锤落距 mm ±300 钢索设标志
2 夯锤质量 kg ±100 称重
3 夯击遍数 不小于设计值 计数法
4 夯击顺序 设计要求 检查施工记录
5 夯击击数 不小于设计值 计数法
6 夯点位置 mm ±500 用钢尺量
7 夯击范围(超出基础范围距离) 设计要求 用钢尺量
8 前后两遍间歇时间 设计值 检查施工记录
9 最后两击平均夯沉量 设计值 水准测量
10 场地平整度 mm ±100 水准测量

4.7注浆地基
4.7.1 施工前应检查注浆点位置、浆液配比、浆液组成材料的性能及注浆设备性能。
4.7.2 施工中应抽查浆液的配比及主要性能指标、注浆的顺序及注浆过程中的压力控制等。
4.7.3 施工结束后，应进行地基承载力、地基土强度和变形指标检验。
4.7.4注浆地基的质量检验标准应符合表4.7.4的规定。
表4.7.4 注浆地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项目 1 地基承载力 不小于设计值 静载试验
2 处理后地基土的强度 不小于设计值 原位测试
3 变形指标 设计值 原位测试
一般
项
目 1 原材
料检
验 注浆
用砂 粒径 mm <2.5 筛析法
细度模数 <2.0 筛析法
含泥量 ％ <3 水洗法
有机质含量 ％ <3 灼烧减量法
注浆
用黏土 塑性指数 >14 界限含水率试验
黏粒含量 ％ >25 密度计法
含砂率 ％ <5 洗砂瓶
有机质含量 ％ <3 灼烧减量法
粉煤
灰 细度模数 不粗于同时使用的水泥 筛析法
烧失量 ％ <3 灼烧减量法
水玻璃：模数 3.0～3.3 试验室试验
其他化学浆液 设计值 查产品合格证书或抽样送检
2 注浆材料称量 ％ ±3 称重
3 注浆孔位 mm ±50 用钢尺量
4 注浆孔深 mm ±100 量测注浆管长度
5 注浆压力 ％ ±10 检查压力表读数

4.8 预压地基
4.8.1 施工前应检查施工监测措施和监测初始数据、排水设施和竖向排水体等。
4.8.2 施工中应检查堆载高度、变形速率，真空预压施工时应检查密封膜的密封性能、真空表读数等。
4.8.3 施工结束后，应进行地基承载力与地基土强度和变形指标检验。
4.8.4 预压地基质量检验标准应符合表4.8.4的规定。
表4.8.4 预压地基质量检验标准
项 序 检查项目 允许值或允许偏差 检查方法
单位 数值
主
控
项目 1 地基承载力 不小于设计值 静载试验
2 处理后地基土的强度 不小于设计值 原位测试
3 变形指标 设计值 原位测试
一
般项目 1 预压荷载(真空度) ％ ≥-2 高度测量(压力表)
2 固结度 ％ ≥-2 原位测试(与设计要求比)
3 沉降速率 ％ ±10 水准测量(与控制值比)
4 水平位移 ％ ±10 用测斜仪、全站仪测量
5 竖向排水体位置 mm ≤100 用钢尺量
6 竖向排水体插入深度 mm +200
0 经纬仪测量
7 插入塑料排水带时的回带长度 mm ≤500 用钢尺量
8 竖向排水体高出砂垫层距离 mm ≥100 用钢尺量
9 插入塑料排水带的回带根数 ％ <5 统计
10 砂垫层材料的含泥量 ％ ≤5 水洗法

4.9砂石桩复合地基
4.9.1 施工前应检查砂石料的含泥量及有机质含量等。振冲法施工前应检查振冲器的性能，应对电流表、电压表进行检定或校准。
4.9.2 施工中应检查每根砂石桩的桩位、填料量、标高、垂直度等。振冲法施工中尚应检查密实电流、供水压力、供水量、填料量、留振时间、振冲点位置、振冲器施工参数等。
4.9.3 施工结束后，应进行复合地基承载力、桩体密实度等检验。
4.9.4砂石桩复合地基质量检验标准应符合表4.9.4的规定。