深基坑开挖施工安全措施.doc

深基坑开挖施工安全措施 深基坑开挖施工安全措施提要：基坑底面不能暴露时间过长。基坑开挖中间间歇间过长，变形会随着时间不断增加。这种情况下，应考虑增加支护结构的强度 深基坑开挖施工安全措施 1、进入工地一定要戴硬质反光安全帽，操作工必须手戴防护手套，电工戴电工专用绝缘手套。 2、用机械开挖时，应设专人盯测，以防坑底和坑侧超挖。坑底的控制标高应比 3、设计标高提高15－30厘米，坑壁的控制线应比设计标线提高10－15厘米或先打桩后挖土，机械挖完后，再用人工清坑。 4、对设内支撑的基坑，在每层土开挖中，同时开挖的部分，在位置及深度上， 5、要保持对称，防止基坑结构承受偏载。基坑开挖应分层进行，高差不宜过大。土质越软，高差应越小。 6、基坑开挖到设计标高后，一定要将支护桩根部的淤泥清挖，否则会造成支护桩倒塌。 7、基坑底面不能暴露时间过长。基坑开挖中间间歇间过长，变形会随着时间不断增加。这种情况下，应考虑增加支护结构的强度。 8、顶管工作井的后靠背和出洞位置必须平整垂直，否则会发生顶进偏移和后靠背破坏。 9、遇有粉、细砂层时，要采用恰当的排水方式，以防产生流砂造成基坑坍塌。 10、如果基坑开挖后，不能立即进行下一道工序施工时，可在基坑设计标高之上，预留厚的一层土不挖，待下一工序开始前，再用人工开挖至槽底的设计标高。否则在下雨时，基坑会浸水坍塌。 11、验收合格方可进行作业，未经验收或验收不合格不准作下一道工序作业。 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 assistance, honest and trustworthy, law-abiding, good quality, hard work, set a good XX students ideological quality, psychological quality and image quality. The formation of excellent moral education curriculum system and manageme