半挖半填高填方路基加固施工技术.doc
《半挖半填高填方路基加固施工技术.doc》由会员分享,可在线阅读,更多相关《半挖半填高填方路基加固施工技术.doc(9页珍藏版)》请在装配图网上搜索。
半挖半填高填方路基加固施工技术摘 要:从填方路基加固施工工艺及方法、夯实重锤及单向土工格栅性能指标要求、施工检验和质量控制等方面介绍了半挖半填高填方路基加固的施工技术,指出该技术保证了工程质量,达到了预期效果。关键词:填方路基;施工工艺;质量控制1工程概况福建省泉州至三明高速公路第QA6合同段,线路全长8.4Km,里程K45+300K45+700段半挖半填路基最大填方高度25.6 m,采用加筋路堤挡土墙收缩坡脚,加筋边坡采用1:0.75,路肩以下10 m处设一级2 m宽平台,路肩以下25 m处设路堤式挡土墙。加筋路堤坡面采用三维网加种草防护,加筋采用单向土工格栅。为减少不均匀沉降,该段路基填挖结合部采用重锤夯实。2填方路基加固施工工艺及方法2.1重锤夯实施工工艺及方法施工工艺。清理、平整场地标出夯点位置测量场地高程强夯机对点就位测量夯前锤顶高程夯击测量锤顶高程重复以上工序至完成夯击推土机推平夯坑普夯一遍碾压密实测量高程。施工方法。夯点布置:半填半挖路基原地面开挖台阶宽度大于2.0 m,当填平第一层台阶时才能形成工作面,故原地面第一台阶不能强夯。当路基填方宽度大于5 m时开始布点,布点按正方形布置,间距2.5 m。夯击控制:采用夯击数与下沉量双向控制指标,即每点击三次或最后两夯下沉量小于5 cm结束一个点位夯击。2.2单向土工格栅施工工艺及方法施工工艺。清理平整土层顶面标出铺设范围、方向铺土工格栅锚固土工格栅内端头填土(石) 回折土工格栅外端头。施工方法。铺土工格栅前首先对压实层顶面进行清理,表面应平整,不得有碎、块石等坚硬物凸出。根据填层宽度确定土工格栅铺设内、外边界,用白灰撒线标出土工格栅铺设范围、方向。按铺设土工格栅的长度现场下料,长度不小于10 m。将土工格栅强度高的方向置于垂直于路堤轴线方向,土工格栅横向叠合长度不小于15 cm,用u型钉固定土工格栅。土工格栅上填土完毕后,人工回折土工格栅外露端头。3.夯实重锤及单向土工格栅性能指标要求夯实重锤性能指标要求。夯锤技术指标:锤底面积2.356 m2,锤重100 kN,落距9 m。起重设备采用履带式起重机,其具有稳定性,行走方便,机动灵活,容易调动的特点。单位夯击能为锤重乘以落距除以锤底面积。根据不同的地基类别、结构类型、荷载大小和要求处理的深度等综合考虑,施工段内原状土多为 Q3黄土,具有I级自重湿陷,夯击能过小加固效果差,夯击能过大,不仅浪费能源,相应增加费用,而且还会破坏原土体,降低强度。根据现场实际土质情况及业主要求夯击能不小于350 kNm 的规定,确定夯能为382 kNmm2。单向土工格栅性能指标要求。单向土工格栅的强度,伸长率大小直接影响半挖半填高填方路基加固效果,由试验室得出土工格栅的各项指标见表1。表1 单向拉伸聚丙烯土工格栅性能指标试验项目单位性能指标实测结果每延米拉伸屈服强度1Kn/m不小于5056.25屈服伸长率%不大于108.52%伸长率的强度Kn/m不小于1213.622%伸长率强度Kn/m不小于2831.05检测依据GB/T 17689-1999备注:依据GB/T 17689-1999评定标准,以上指标均合格 4施工检验和质量控制4.1重锤施工检验和质量控制施工前调查强夯范围内地下构造物和地下管线位置,并采取必要的防护措施,距地表2 m以内的废弃不用的构造物应彻底挖除。将地表杂草、树根、腐植土清除干净,原地面推平后压实并测量原地面压实度。以实测压实度作为控制比较值。在整平场地上,按夯点布置图布置夯点,夯点位置应准确测放,标明位置,方便后续施工。提前测定地基含水量。对高于最佳含水量地段应做翻晒处理,低于含水量地段应做渗水处理。夯击时严格按设计确定参数及标准进行,落锤保持平稳准确,如遇锤侧向倾斜应及时查明原因,并做相应技术处理。做好强夯过程中的测量记录工作。夯前应对锤重进行计量,对落距进行标定。现场观察使用S3水准仪测量夯沉量。现场工程师应对夯点布置、夯击次数、单击夯沉量等强夯参数进行详细记录,作为质量控制依据。强夯结束后检测密实度,并与始测密实度对比,以增加至设计密实度为测控标准,如遇密实度下降或持平现象,应及时汇报总工程师,对其原因进行分析,作出相应的处理措施。4.2单向土工格栅施工检验与质量控制加筋材料单向土工格栅在铺设时,应将强度高的方向置于垂直于路堤轴线方向,材料之间的连接应牢固,在受力方向连接处的强度不得低于材料设计抗拉强度,且其叠合长度不应小于15 cm,层与层之间回折搭接不应小于2 m。土工格栅的铺设不允许有褶皱,应用人工拉紧,必要时可采用插钉等措施固定土工格栅填土表面;铺设土工格栅的土层表面应平整且严禁有碎、块石等坚硬凸出物,在距土工格栅8 cm以内的路堤填料,其最大粒径不得大于6 cm。土工格栅摊铺以后应及时填筑填料,间隔时间不应超过48 h,加筋路堤的边坡防护应和路堤的填筑同时进行,在夏季施工,如防护工作不到位,应及时对坡面的土工格栅采取临时保护措施,以避免其受阳光过长时间的直接曝晒。土工格栅上的第一层填土摊铺宜采用轻型推土机或前置式装载机,填料的摊铺与填筑从路堤的中线位置开始,对称地向两侧填土;一切车辆、施工机械只容许沿路堤的轴线方向行驶。5结语K45+300K45+700段半挖半填高填方路基于2008年3月10日开工,2008年6月30日完工,经过沉降观测,证明采用铺设单向土工格栅,减小路堤边坡坡率,收缩路堤坡脚,既能减少高填方路基占用农田、破坏植被面积,又能确保路堤稳定;填挖结合部重锤夯实有效防止半挖半填高填方路基从填挖结合部开裂。参考文献:1JTJ033-95,公路路基施工技术规范S.2JTJ051-97,公路土工试验规程S.3JTJ001-2003,公路工程技术标准S.4JTJ071-2004,公路工程质量检验评定标准Sorganization system and working mode, the selection of a number of municipal strengthening group to build innovation and strengthen the organization of the basic level organizations advanced model.(seven) the manual work of the Communist Youth League Organization published and League branch of manual work, to promote the use of two manuals in the citys organizations at various levels. The county committee, directly under the group (work) is under the jurisdiction of grassroots League and group (total) using branch ratio shall not be less than 70%.Three, to further strengthen the groups leadership and team building(a) to strengthen the leagues leadership at all levels of construction. Continue to do a good job of municipal Party Committee Organization Department on the strengthening of the Communist Youth League cadres management opinions implementation. To promote the group counties (autonomous counties, cities) Commission and city directly under the group (workers) appointed to carry out the Five team building activities. Improve the League Association Department working mechanism. Conscientiously fulfill the duties of CO, combined with the city group directly under (the) Committee of the general election and the adjustment, actively jointly with the unit where the party organization department good group leadership selection with the work. Do a good job in municipal Party committee assistant committee leadership and leading cadres of the annual assessment work, adhere to and improve the assistant secretary of the Communist Youth League talk system group To weave individual conversation and collective conversation, to strengthen the committees of all levels, the Standing Committee of the Standing Committee, the establishment of a sound system of central group learning, the system of investigation and study, the system of important issues and the reporting system.(two) to strengthen the work of education and training of cadres to conscientiously implement the Central Committee. On the implementation of grassroots cadres training project and opinions on carrying out the mission municipal CYL Cadres training project implementation opinions, full implementation of the project of the City Youth League cadres training education. Focus on the county grassroots cadres and workers focused on training, the new school system vocational training League cadres, for the Municipal Organization Department jointly held the third session of the Communist Youth League system training cadres in party. Focusing on the construction of new socialist countryside, strengthening village cadres and rural construction team group member of the young team, the county organizations at various levels throughout the year is expected to train 100 00 rural grassroots cadres, plans to train 1000 village secretary of the village Party branch.(three) actively promote grassroots cadres election work. Under the unified leadership of the party organization, to strengthen grassroots organizations direct work, standardize the election work rules and procedures, in the designated candidate, open competition to democratically elected branch secretary at the same time, actively and steadily the development of Township, streets and other grassroots organizations in the direct election of the pilot work, on the basis of summarizing the experience and gradually expand the scope of the pilot, and gradually formed a set of measures and cadres election system.(four) to strengthen the cadres testing exercise. To study the development of XX city from 2006 to 2008 cadres testing exercise planning. To select outstanding cadres to the central mission in Beijing, Shanghai, Guangzhou and other central organs and sending work in developed areas. With the Central Committee the implementation of the western region and ethnic minorities cadres training plan . To carry out the eighth batch of municipal organs attachment cadre management, selection, training work. The outstanding cadres to start the National Development Bank XX branch testing exercise.(five) to strengthen the group construction. The main position to play the role of Youth League cadre education and training as the city, in accordance with the requirements of post training, further curriculum scientifically and rationally, adopt arrangement menu course, basic theory includes group work, focus, hot and difficult issues, to enhance the content and practice; to strengthen the construction of teaching staff, the integration of teachers, establish a quality teacher training team, establish and implement course evaluation system; take delivery of training to the countryside, on-site training, and increase the rural grassroots cadres training efforts.Four, efforts to strengthen the work of young talent(a) to tenth XX young 54 medal in recognition of the publicity, and actively explore the XX youth service. 54 Medal of institutionalization, standardization and socialization mechanism. Give full play to the XX award in recognition of 54 youth medal Association, Youth Award winner in the 54 chapter, investigation activities. Who won the Youth Service medal, dedication to the society to create conditions, build the stage. During the 54, named in recognition of the tenth XX young 54 medal. The association of XX editing of young talent , the exchange of information and communication platform for the XX of outstanding young talents.(two) the establishment of municipal Party committee of young talent information database. In accordance with the feasible, effective, classification management, implement step by step principle, the establishment of municipal Party committee of youth talent database; guiding organizations at various levels generally established the young talent database, construction of city, county (directly under the Communist Youth League), grassroots organizations three young talent information database the relevant information collection system, and gradually establish the citys young people, the Communist Youth League youth talent information network, provide information platform for young talent resource development.Five, take effective measures to strengthen the mission management(a) to strengthen the mission management work. Strengthen the dues collection and management, continue to adhere to the dues collection regularly reporting system, the annual comprehensive award in recognition of the tour and the tour one vote veto system audit system. Do statistical work in the group. The group service award in recognition of the advanced units, standardization, promoting group management work institutionalized.(two) to strengthen the organization of research and information exchange efforts. Grassroots carry out research, efforts to form a number of theoretical results. Make full use of the network carrier, to explore the establishment of electronic group service system, promote the work of Communist Youth League information.Attachment 4:XX municipal Party Committee Propaganda Department of the Communist Youth League work pointsIn 2006, the Communist Youth League propaganda ideological work XX to Deng Xiaoping theory and the important thought of Three Represents as guidance, study and implement the partys sixteen and the spirit of the the fifth Plenary Session of the 16th CPC Central Committee implementation of the eight plenary session of the two committee, the citys cultural work conference, the Propaganda Department of the meeting and the the fourth Plenary Session of the 15th CPC Central Committee permanent mission spirit, closely around 11th Five-Year XX the goal of full implementation of Scientific Outlook on Development, emancipating the mind, seeking truth from facts, keep pace with the times, close to reality, close to life, close to the young, persevere grasp orientation, grasping deepening, grasping construction innovation, further improve the groups propaganda and ideological work ability, unity To guide the majority of members of the youth to achieve the 11th Five-Year planning tasks, the overall construction of a well-off society, building a socialist harmonious society to make new contributions.One, adhere to the Three Represents important thought and Scientific Outlook on Development education to guide the youth, to further strengthen the ideological and political education of youth(a) armed with youth science theory. Unremittingly with Deng Xiaoping theory and the important thought of Three Represents armed members of youth education, to promote the study and implement to expand the depth and breadth. To study and implement the important thought of Three Represents with the establishment and implementation of Scientific Outlook on Development combine with the implementation of the requirements of constructing socialist harmonious society with Scientific Outlook on Development, carry out education as an important part of the theory of armed youth in the new period, strengthen the establishment and implementation of Scientific Outlook on Development education, educate and guide the youth to fully understand the great significance of establishment and implementation of Scientific Outlook on Development, in-depth understanding of the Scientific Outlook on Development era back The king, the practice foundation, basic connotation, historical status, spirit and practice requirements, a profound understanding of Scientific Outlook on Development with Marxism Leninism, Mao Zedong thought, inheriting and developing relationship between Deng Xiaoping theory and the important thought of Three Represents, to help young people establish and consciously practice Scientific Outlook on Development. Persist in learning, grasping the backbone, grasp the practice, grasp the opportunity. Catch club, effective way to grasp the network, with the group of cadres, young students and young backbone fronts as the focus, to promote the work of the armed youth theory to develop in depth, to help the youth continue to firm ideals and beliefs, to build a powerful spiritual pillar. To carry out the study and implementation of the partys sixteen session of the five Eight plenary session of the two plenary session of the Central Committee and the party spirit, to the citys Youth League members thinking into the spirit of the meeting, to achieve the goal of national consciousness and XX economic and social development in 11th Five-Year period. Contribute to help and guide the youth to a profound understanding of the significance and main task of building a socialist harmonious society, actively join the construction of socialist harmonious society.(two) to strengthen the ideological and moral construction of teenagers. Thoroughly implement the central spirit of the document No. 8, No. 16 and the program for Improving Civic Morality to minors and students as focus groups, to strengthen and improve the ideological and moral construction of minors and the ideological and political education of college students. Make full use of the spirit and the spirit of the Three Gorges migrants Hongyan XX unique the use of educational resources, school, into the team, the league, to join the party, adult occasions, extensive Hongyan spirit generation theme education activities. Use of holidays and leisure time, youth organizations three rural areas, four communities, four and moral practice, guide the youth Youth to enhance national pride, self-esteem and self-confidence, to establish the trend of the times and adapt to the trend of thinking, value orientation and behavior.(three) innovative ways and means of ideological education. Grasp the new trend of the development of the times, the new hot new features and social ideological status of young people, to further explore the methods of ideological education using modern technology and communication mode of education make lively and vivid, fully embodies the close to reality, close to life, close to the young principle through the cultivation and selection. Hongyan demonstration group, good boy, Hongyan Hongyan Youth and other forms of more scientific use of advanced typical influence and promote youth, and strive to create advocating advanced, learning advanced, striving to advance a good atmosphere.Two, in order to forge ahead with the motherland, and XX with the development as its theme, guide the youth to build a common ideological basis for the construction of a socialist harmonious society(a) grasp the theme of the purpose of the activity. The go ahead with the motherland in the youth, and XX with the development of theme educational activities. Vigorously promote patriotism as the core of the national spirit and reform and innovation as the core spirit of the times, the combination of youth with common ideals and beliefs, with great achievements in socialist modernization the motivation of youth, the youth to enhance self-confidence, sense of mission and responsibility to educate and guide the youth to personal pursuit into the common pursuit of all people, their personal struggle into the great practice of building socialism China characteristics, further firmly follow the party China characteristics The confidence and determination of the socialist road, and build the common ideological foundation of the young people to build a socialist harmonious society.(two) rich theme activities. By carrying out the two generation dialogue , in my eyes, the charm of XX situation and policy through activities such as lectures, report, seminars, theatrical performances, mass cultural activities, to help young people understand Chinas reform and opening up the extraordinary journey and brilliant achievements achieved fruitful results, to understand the citys economic and social development since the new XX, so that young people understand, love the new XX, and then to the construction of the new XX, a firm with the party on the road to socialism with China characteristics of faith; make full use of the 54, 61, National Day and the commemoration of the 85 anniversary of the founding of the red In the 70 anniversary of the victory of the long march and other major activities, the favorable opportunity of major events and major festivals, to carry out educational activities, promote the theme education activities continue to create momentum, the rise of high tide, popular. Further study, promotion of Scientific Outlook on Development, to carry out a wide range of situation and policy education, the development prospect of the future of the motherland and XX, guiding the youth to continue enhance the sense of mission and responsibility, in the implementation of the 11th Five-Year planning and building a well-off society in the historical process of contributions. Be enthusiastic and press on.Three, to lead the trend of youth service, cultural city youth culture is taking action, and promote new progress in the construction of youth 9 / 9organization system and working mode, the selection of a number of municipal strengthening group to build innovation and strengthen the organization of the basic level organizations advanced model.(seven) the manual work of the Communist Youth League Organization published and League branch of manual work, to promote the use of two manuals in the citys organizations at various levels. The county committee, directly under the group (work) is under the jurisdiction of grassroots League and group (total) using branch ratio shall not be less than 70%.Three, to further strengthen the groups leadership and team building(a) to strengthen the leagues leadership at all levels of construction. Continue to do a good job of municipal Party Committee Organization Department on the strengthening of the Communist Youth League cadres management opinions implementation. To promote the group counties (autonomous counties, cities) Commission and city directly under the group (workers) appointed to carry out the Five team building activities. Improve the League Association Department working mechanism. Conscientiously fulfill the duties of CO, combined with the city group directly under (the) Committee of the general election and the adjustment, actively jointly with the unit where the party organization department good group leadership selection with the work. Do a good job in municipal Party committee assistant committee leadership and leading cadres of the annual assessment work, adhere to and improve the assistant secretary of the Communist Youth League talk system group To weave individual conversation and collective conversation, to strengthen the committees of all levels, the Standing Committee of the Standing Committee, the establishment of a sound system of central group learning, the system of investigation and study, the system of important issues and the reporting system.(two) to strengthen the work of education and training of cadres to conscientiously implement the Central Committee. On the implementation of grassroots cadres training project and opinions on carrying out the mission municipal CYL Cadres training project implementation opinions, full implementation of the project of the City Youth League cadres training ed- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 半挖半填高 填方 路基 加固 施工 技术
装配图网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文