箱涵施工鋼板樁支護(hù)方案

1、1目錄1編制依據(jù)及說明編制依據(jù)及說明.............................................................................................................22工程概況工程概況...................................................................................

2、......................................23工程地質(zhì)概況工程地質(zhì)概況.................................................................................................................24鋼板樁支護(hù)設(shè)計(jì)思路及要點(diǎn)鋼板樁支護(hù)設(shè)計(jì)思路及要點(diǎn).............................

3、............................................................35基坑穩(wěn)定性換算基坑穩(wěn)定性換算.............................................................................................................36施工組織計(jì)劃施工組織計(jì)劃.....................

4、............................................................................................47施工機(jī)械及設(shè)備施工機(jī)械及設(shè)備.............................................................................................................58鋼

5、板樁施工鋼板樁施工.....................................................................................................................59土方工程的施工土方工程的施工..............................................................................

6、.............................1210基坑監(jiān)測(cè)措施基坑監(jiān)測(cè)措施...............................................................................................................1311施工工期施工工期....................................................

7、...................................................................1412質(zhì)量保證措施質(zhì)量保證措施...............................................................................................................1413安全施工措施安全施工措施..........

8、.....................................................................................................1414文明施工措施文明施工措施.......................................................................................................

9、........163含砂亞粘土層、強(qiáng)風(fēng)化砂礫巖層。一、雜填土層：層厚約0～1.3m；二、含砂亞粘土層：層厚約0.5～3.0m；三、強(qiáng)風(fēng)化砂礫巖層0.5～4.3m；4鋼板樁支護(hù)設(shè)計(jì)思路及要點(diǎn)鋼板樁支護(hù)設(shè)計(jì)思路及要點(diǎn)根據(jù)本工程場(chǎng)地地質(zhì)情況特點(diǎn)，本工程鋼板樁主要作用是為了減少道路開挖面積隔絕2m～5.5m地下水流入基坑，同時(shí)防止基坑土方開控邊坡塌方，起到支護(hù)邊坡的作用。設(shè)計(jì)要點(diǎn)如下：一、采用拉森式（U）型鋼板樁，樁長6～9m；二、鋼板樁穿過

10、含砂亞粘土層，進(jìn)入強(qiáng)風(fēng)化巖面；三、K0000～K0400沿路鋼板樁沿基坑兩側(cè)連續(xù)設(shè)置長約118m；K2599.613過路箱涵及K2599.613過路箱涵兩處四周都連續(xù)設(shè)置成封閉的帷幕周長合計(jì)約299m。四、為保證基坑安全，鋼板樁帷幕上設(shè)置一道連續(xù)的工字鋼或槽鋼圍檁以加強(qiáng)鋼度及整體性；5基坑穩(wěn)定性換算基坑穩(wěn)定性換算1、基本參數(shù)：、基本參數(shù)：a)支護(hù)入土深度h：3.5m；b)基坑深度t：2.6c)土體平均密度r：16KNm3；d)地面荷載q

11、：0；e)鋼板樁長度L：6m；f)軟土內(nèi)聚力C：5Kpa；h)軟土內(nèi)mc摩擦角0：8oi)角支撐鋼梁Φ220，長度約8.5m；j)鋼板樁抗彎強(qiáng)度(抗森Ⅲ)δ：182Mpa。2、基本力學(xué)數(shù)據(jù)計(jì)算：、基本力學(xué)數(shù)據(jù)計(jì)算：a)Ka=tg2(4502)=tg41=0.72。b)b)Kb=tg2(4502)=tg249=1.323。c)h0=2cr=2516=0.72m。Ka765.0d)Ea12(KaHa2)=120.7563.52=4.63Kp