本規(guī)程主要技術(shù)內(nèi)容是:基本規(guī)定、支擋式結(jié)構(gòu)、土釘墻、重力式水泥土墻、地下水控制、基坑開挖與監(jiān)測。

JGJ120-2012······1

1 總則······11

2 術(shù)語和符號······12

2.l 術(shù)語······12

2.2 符號······14

3 基本規(guī)定······18

3.1 設(shè)計原則······18

3.2 勘察要求與環(huán)境調(diào)查······23

3.3 支護結(jié)構(gòu)選型······24

3.4 水平荷載······26

4 支擋式結(jié)構(gòu)······33

4.1 結(jié)構(gòu)分析······33

4.2 穩(wěn)定性驗算······39

4.3 排樁設(shè)計······45

4.4 排樁施工與檢測······48

4.5 地下連續(xù)墻設(shè)計······50

4.6 地下連續(xù)墻施工與檢測······51

4.7 錨桿設(shè)計······53

4.8 錨桿施工與檢測······59

4.9 內(nèi)支撐結(jié)構(gòu)設(shè)計······62

4.10 內(nèi)支撐結(jié)構(gòu)施工與檢測······67

4.11 支護結(jié)構(gòu)與主體結(jié)構(gòu)的結(jié)合及逆作法······69

4.12 雙排樁設(shè)計······75

5 土釘墻······79

5.1 穩(wěn)定性驗算······79

5.2 土釘承載力計算······82

5.3 構(gòu)造······85

5.4 施工與檢測······88

6 重力式水泥土墻······92

6.1 穩(wěn)定性與承載力驗算······92

6.2 構(gòu)造······96

6.3 施工與檢測······97

7 地下水控制······98

7.1 一般規(guī)定······98

7.2 截水······98

7.3 降水······101

7.4 集水明排······110

7.5 降水引起的地層變形計算······111

8 基坑開挖與監(jiān)測······113

8.1 基坑開挖······113

8.2 基坑監(jiān)測······115

附錄A 錨桿抗拔試驗要點······120

附錄B 圓形截面混凝土支護樁的正截面受彎承載力計算······125

附錄C 滲透穩(wěn)定性驗算······128

附錄D 土釘抗拔試驗要點······130

附錄E 基坑涌水量計算······133

本規(guī)程用詞說明······136

引用標準名錄······137

附:條文說明······139

1 總則······143

3 基本規(guī)定······145

3.1 設(shè)計原則······145

3.2 勘察要求與環(huán)境調(diào)查······154

3.3 支護結(jié)構(gòu)選型······155

3.4 水平荷載······158

4 支擋式結(jié)構(gòu)······161

4.1 結(jié)構(gòu)分析······161

4.2 穩(wěn)定性驗算······164

4.3 排樁設(shè)計······167

4.4 排樁施工與檢測······169

4.5 地下連續(xù)墻設(shè)計······171

4.6 地下連續(xù)墻施工與檢測······172

4.7 錨桿設(shè)計······174

4.8 錨桿施工與檢測······178

4,9 內(nèi)支撐結(jié)構(gòu)設(shè)計······179

4.11 支護結(jié)構(gòu)與主體結(jié)構(gòu)的結(jié)合及逆作法······182

4.12 雙排樁設(shè)計······185

5 土釘墻······189

5.1 穩(wěn)定性驗算······189

5.2 土釘承載力計算······190

5,3 構(gòu)造······191

5.4 施工與檢測······192

6 重力式水泥土墻······194

6.1 穩(wěn)定性與承載力驗算······194

6.2 構(gòu)造······194

6.3 施工與檢測······195

7 地下水控制······196

7.1 一般規(guī)定······196

7.2 截水······197

7.3 降水······199

7.4 集水明排······201

7.5 降水引起的地層變形計算······202

8 基坑開挖與監(jiān)測······204

8.1 基坑開挖······204

8.2 基坑監(jiān)測······205

附錄B 圓形截面混凝土支護樁的正截面受彎承載力計算······207

附錄C 滲透穩(wěn)定性驗算······208