DB/T29-20-2017：天津市岩土工程技术规范

DBT29-20-2017······1

目次······8

1 总则······21

2 术语······22

3 基本规定······25

4 岩土工程勘察要点······29

4.1 地基土类型······29

4.2 地下水类型与划分······31

4.3 勘察阶段与工作量布置······32

4.4 室内试验和原位测试······34

4.5 勘察报告······38

5 地基计算······39

5.1 基础埋置深度······39

5.2 承载力计算······40

5.3 变形计算······47

5.4 稳定性计算······50

6 边坡稳定······53

6.1 一般规定······53

6.2 抗剪强度指标······53

6.3 边坡设计······54

6.4 边坡稳定验算······56

6.5 保证边坡稳定的措施······63

7 地基处理······65

7.1 一般规定······65

7.2 复合地基计算······67

7.3 垫层法······74

7.4 振动压密法······79

7.5 小能量连续强夯法······80

7.6 砂石桩法······82

7.7 水泥上搅拌法······85

7.8 堆载预压法······89

7.9 真空预压法······96

7.10 真空预压联合堆载预压法······104

7.11 刚性桩复合地基······104

7.12 多桩型复合地基······107

7.13 路基处理······108

8 软弱地基······113

8.1 一般规定······113

8.2 软弱地基设计······114

8.3 建筑设计措施······114

8.4 结构设计措施······116

8.5 大面积地面荷载······118

8.6 施工措施······120

9 浅基础······121

9.1 一般规定······121

9.2 无筋扩展基础······122

9.3 扩展基础······124

9.4 柱下条形基础······136

9.5 筏形基础······138

10 桩基础······150

10.1 一般规定······150

10.2 桩基构造······152

10.3 桩顶荷载计算······153

10.4 桩基竖向承载力计算······154

10.5 桩基沉降计算······159

10.6 桩基水平承载力计算······164

10.7 承台计算与构造······164

10.8 减沉复合桩基础······173

10.9 灌注桩施工······178

10.10 预制桩施工······187

10.11 承台施工······191

11 基坑工程······192

11.1 一般规定······192

11.2 土压力与水压力······196

11.3 支挡式支护结构构造要求······199

11.4 支挡式支护结构设计计算······201

11.5 土层锚杆······211

11.6 基坑工程逆作法······213

11.7 岩体基坑工程······215

11.8 水泥土支护结构······216

11.9 地下水控制······218

11.10 防连续倒塌设计原则······221

11.11 基坑变形控制······224

11.12 基坑工程监测······225

12 盾构隧道工程······228

12.1 一般规定······228

12.2 隧道勘察······230

12.3 隧道结构设计······230

12.4 盾构隧道土体加固······235

12.5 盾构机掘进······243

12.6 盾构机轴线控制······245

12.7 盾构机纠偏量的控制······246

12.8 特殊地段施工······247

12.9 壁后注浆······247

12.10 隧道防水······250

12.11 盾构法隧道施工质量标准······251

13 顶管工程······253

13.1 一般规定······253

13.2 顶管管材······254

13.3 顶管工作井设计······262

13.4 顶管机选型······262

13.5 顶管顶力计算······264

13.6 顶进方法的选择······265

13.7 工作坑······266

13.8 顶进······269

13.9 减阻与注浆······273

13.10 中继间······274

13.11 顶管允许偏差······274

14 市政工程地基基础······276

14.1 一般规定······276

14.2 桥涵基础······276

14.3 板桩岸壁······278

14.4 加筋土挡土墙······284

14.5 重力式挡土墙······287

14.6 管道基础······290

14.7 沉井······292

14.8 边坡稳定······296

15 港湾工程地基基础······297

15.1 一般规定······297

15.2 地基承载力······298

15.3 土坡和地基稳定······307

15.4 地基沉降······313

15.5 桩基工程······317

16 场地与地基抗震······328

16.1 一般规定······328

16.2 场地······328

16.3 场地反应谱······330

16.4 场地稳定性······331

16.5 地基抗震······334

17 现场检验与监测······336

17.1 一般规定······336

17.2 基槽的检验与监测······337

17.3 基坑与地下工程的检验与监测······337

17.4 桩基础检验与监测······341

17.5 建筑物沉降观测······344

附录A 岩土基本变量统计参数的确定方······346

附录B 竖向荷载作用下地基承载力系数······348

附录C 浅层平板载荷试验要点······349

附录D 沉降计算等效深度······352

附录E 复合地基静载荷试验······353

附录F 室内水泥土抗压强度试验要点······358

附录G 水泥土搅拌桩抽芯检测试验要点······361

附录H 石灰土处理层厚度计算图······363

附录J 复合配筋预应力混凝土桩配筋表及承载力计算······364

附录K 单桩竖向静载荷试验要点······368

附录L 单桩水平载荷试验要点······372

附录M 矩形支护桩配筋表······375

附录N 基坑支护结构计算要点······376

附录P 自由变形的弹性均质圆环内力计算······385

附录Q 顶管允许顶力计算方法······387

附录R 挡土墙土压力计一算······389

附录S 地基承载力系数表······393

附录T 桩的单位面积极限侧摩阻力与极限端阻力标准值······399

附录U 水平力作用下桩的计算······407

附录V 各类土动剪切模量比、阻尼比与剪应变关系······423

本规范用词说明······427

引用标准名录······428

目次······435

3 基本规定······440

4 岩土工程勘察要点······441

4.1 地基土类型······441

4.2 地下水类型与划分······441

4.3 勘察阶段与工作量布置······442

4.4 室内试验和原位测试······443

4.5 勘察报告······444

5 地基计算······445

5.1 基础埋置深度······445

5.2 承载力计算······446

5.3 变形计算······453

6 边坡稳定······455

6.1 一般规定······455

6.2 抗剪强度指标······456

6.3 边坡设计······457

6.4 边坡稳定验算······458

6.5 保证边坡稳定的措施······461

7 地基处理······462

7.1 一般规定······462

7.2 复合地基计算······462

7.3 垫层法······469

7.4 振动压密法······476

7.5 小能量连续强夯法······477

7.6 砂石桩法······478

7.8 堆载预压法······481

7.9 真空预压法······485

7.10 真空预压联合堆载预压法······488

7.13 路基处理······489

8 软弱地基······492

8.1 一般规定······492

8.3 建筑设计措施······492

8.4 结构设计措施······493

8.5 大面积地面荷载······493

8.6 施工措施······494

9 浅基础······495

9.2 无筋扩展基础······495

9.3 扩展基础······495

9.4 柱下条形基础······500

9.5 筏形基础······501

10 桩基础······519

10.1 一般规定······519

10.4 桩基竖向承载力计算······525

10.5 桩基沉降计算······528

10.8 减沉复合桩基础······531

10.9 灌注桩施工······535

10.10 预制桩施工······536

11 基坑工程······540

11.1 一般规定······540

11.2 土压力与水压力······540

11.3 支挡式支护结构构造要求······542

11.4 支挡式支护结构设计计算······543

11.8 水泥土支护结构······546

11.9 地下水控制······548

11.10 防连续倒塌设计原则······549

11.11 基坑变形控制······559

12 盾构隧道工程······567

12.1 一般规定······567

12.2 隧道勘察······567

12.3 隧道结构设计······567

12.4 盾构隧道土体加固······576

12.5 盾构机掘进······576

12.6 盾构机轴线控制······577

12.7 盾构机纠偏量的控制······579

12.8 特殊地段施工······580

12.9 壁后注浆······582

12.10 隧道防水······584

13 顶管工程······586

13.1 一般规定······586

13.2 顶管管材······588

13.3 顶管工作井设计······590

13.5 顶管项力计算······591

13.6 顶进方法的选择······592

13.8 顶进······592

11.9 减阻与注浆······593

13.10 中继间······593

13.11 顶管允许偏差······594

14 市政工程地基基础······595

14.1 一般规定······595

14.2 桥涵基础······595

14.3 板桩岸壁······597

14.4 加筋土挡土墙······599

14.5 重力式挡土墙······600

14.6 管道基础······601

14.7 沉井······603

14.8 边坡稳定······605

15 港湾工程地基基础······606

15.1 一般规定······606

15.2 地基承载力······607

15.3 土坡和地基稳定······612

15.4 地基沉降······618

15.5 桩基工程······624

16 场地与地基抗震······631

16.1 一般规定······631

16.2 场地······631

16.3 场地反应谱······632

16.4 场地稳定性······632

17 现场检验与监测······633

17.1 一般规定······633

17.2 基槽的检验与监测······633

17.3 基坑与地下工程的检验与监测······634

17.4 桩基础检验与监测······635

17.5 建筑物沉降观测······638