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基坑土钉墙支护专项施工组织设计及
施工方案
文件编号：__ABC-RQ-20XX___ 编 制：________________ 审 核：________________ 校 订：________________ 批 准：________________
发布日期： 20XX年1月1日 生效日期：20XX年1月1日
分发部门
■总经理 ■XXX部 ■XXX部
■常务副总 ■XXX部 ■XXX部
■财务副总 ■XXX部 ■XXX部
■工程副总 ■XXX部 ■XXX队
目 录
一、工程概况 ·························································· 1 二、基坑边坡土层概况 ·············································· 1
（一）素填土 ·································································· 1 （二）黄土状粘土 ···························································· 1 （三）黄土状粉土 ···························································· 1
三、土钉墙、挂网素喷、护壁桩挂网支护体系支护设计 ··· 1
（一）编制依据 ······························································· 2 （二）土钉墙支护设计 ······················································ 2
1、土钉墙立面布置 ······································································· 2
2、土钉长度 ················································································ 2 3、施工顺序 ················································································ 2 4、施工设备 ················································································ 3 5、施工才料 ················································································ 3
（三）挂网素喷支护设计 ··················································· 3
四、施工方案 ·························································· 4
（一）施工主要技术依据 ··················································· 4 （二）护坡桩施工 ···························································· 4
1、施工方法及施工工艺流程 ··························································· 4 2、成孔工艺及质量保证措施 ··························································· 4
（1）成孔工艺 ························································································ 4
①钻孔································································································ 4 ②清孔································································································ 4 （2）成孔顺序 ························································································ 5 （3）成孔质量标准及检测方法 ··································································· 5 （4）成孔质量保证措施 ············································································ 5
3、钢筋笼制作、安放及质量保证措施 ·············································· 6
（1）钢筋笼制作 ····················································································· 6 （2）钢筋笼安放 ····················································································· 6
4、砼灌注施工工艺及质量保证措施·················································· 6
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（1）砼灌注施工工艺 ··············································································· 6 （2）质量标准及检查方法 ········································································· 6 ①混凝土强度 ······················································································ 6 ②混凝土坍落度 ··················································································· 6 ③桩顶标高 ························································································· 6 ④充盈系数 ························································································· 6 （3）质量保证措施 ·················································································· 7
5、事故预防及处理措施 ································································· 7
（1）坍孔预防及处理 ··············································································· 7 （2）孔斜预防与处理 ··············································································· 8 （3）掉笼，浮笼事故预防与处理 ································································ 8 （4）断桩事故预防及处理 ········································································· 8
（四）冠梁施工 ······························································· 9
1、冠梁施工工艺流程图 ································································· 9 2、施工工序 ················································································ 9
（1）搭设施工架子 ·················································································· 9 （2）铺设并固定钢筋网 ············································································ 9 （3）设置土钉 ························································································ 9 （4）水泥砂浆制备 ················································································· 10 （5）喷射砼面层 ···················································································· 10 （6）养护 ····························································································· 11
五、施工组织 ························································ 11
（一）人员组织及岗位职责 ···············································11
1、施工组织机构图 ······································································ 11 2、施工主要技术管理人员 ····························································· 12
（三）项目经理部 ·························································· 12 （四）技术组 ································································ 12 （五）质检组 ································································ 13 （六）成孔班 ································································ 13 （七）注浆、喷射班 ······················································· 13 （八）钢筋班 ································································ 13 （九）材料组 ································································ 13 （十）电工组 ································································ 14
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