写字楼基坑支护及基坑降水施工方法.docVIP

写字楼基坑支护及基坑降水施工方法 写字楼基坑支护及基坑降水施工方法提要：现场及周围环境。本工程周围环境复杂，邻边多有建筑物地下管线；因基坑较深，施工现场狭窄，用地紧张 自 写字楼基坑支护及基坑降水施工方法 由于施工现场狭窄，基础埋置深，周围环境复杂，根据现场的实际情况，基坑支护选用“全封闭垂直90°”复合土钉支护。由建设单位选定。 1、基坑支护 现场及周围环境。本工程周围环境复杂，邻边多有建筑物地下管线；因基坑较深，施工现场狭窄，用地紧张，基坑北侧距建筑物红线只有，且在基坑边缘处在-6m的位置，有一道φ1000的污水管道，需要保留，同时还要在北侧安装一台QTZ-80塔式起重机一台，作为本工程的垂直运输机械，基坑的西邻近锦秋西路，基坑开挖过程中必须保证路面不受影响，且还要在西侧安装一台QTZ-80塔式起重机。基坑东侧距售楼处不足3m必需保证其安全，南侧与一期工程正在装修阶段的7号、8号、9号楼相邻。 复合土钉支护方案。本工程采用“全封闭90°复合土钉支护”就是土钉与微形钢管（钢筋）灌注桩、预应力锚杆联合的一种支护形式。并且将土钉支护的坡度做成90°。根据施工需要可将土钉墙面层做上防水层及保护层，直接绑扎钢筋，利用土钉支护的面层当作外模板来使用，具体施工方案、施工方法详见《降水护坡、土方开挖施工方案》。 2、基坑降水 本工程场区内根据勘察报告，地下水分为三层，第一层地下水位埋深为左右，静止水位埋深左右，标高左右；第二层地下水为层间水，埋深为17m左右，静止水位标高31~33m；第三层地下水为承压水，埋深为22~24m，静止水位标高27~29m。 根据施工现场实际情况和场地地质条件，降水效果以满足基础施工要求，采用管井降水方案，管井沿基坑周边布置，基坑中间布置一口观测井，降水井间距8m，井深28m。根据建设单位提供的地质资料进行钻孔施工，在施工时尤其注意基坑北侧和东侧的一期工程施工电缆。在钻孔前先根据建设单位提供的资料进行人工查找，否则不得进行钻孔施工。钻完孔后要加强保护作好标识。 自 Measures for the routine management of moral education in Middle SchoolsMethod of conventional management of moral education in middle schoolFirst, the guiding ideology:School moral education is an organic whole of the whole education work, always adhere to the school adhere to the moral education, education for this product, and actively promote the quality education, the school building efficient curriculum system of moral education, moral education, improve the sense of attraction and appeal, enhance the moral education work for through and timeliness. Teach everyone, service education and management education, and school moral education work must be with family education and community education closely together, to form a concerted pattern, and strive to create a good atmosphere for education, and to promote the all-round development of students, to establish a scientific moral education full of vigor the For long-term mechanism.Two, the goal of moral education:To guide the students to form the correct world outlook, outlook on life, values, to cultivate students unity and mutual assista