nh[河南]城市快速路立交现浇箱梁高大模板碗扣支架施工方案(详细计算书,2012).doc
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1、yuan, an increase of 17.5%; local government general budget revenue of 500 million Yuan, . Painting, model culture creates new Ma Church community, creating Lake scenic spot culture education base, received high evaluation from provincial and municipal discipline Inspection Commission, the peoples d
2、aily special report. Constantly promote independent Commission against corruption culture construction to rural extends, created established Dahlin rural industry Park independent Commission against corruption culture positions, formed has a support service low double excellent of members lead team,
3、 constantly perfect and established Park funds assets management, and village audit supervision, and villagers democratic financial, system, strengthening Park party, and Chief, and financial, full public, powerful to guarantees has new rural construction, by city rural style clean government inspec
4、tion unit led of height evaluation. Through the implementation of honest and clean government cultural construction, and effectively educate the broad masses of party members and cadres and consciously regulated behavior and discipline, honesty in politics and culture to create a good atmosphere and
5、 fresh development environment. Although we in implement implementation independent Commission against corruption guidelines aspects made has must effectiveness, but away from superior of requirements also exists must of distance, main performance for: a is system enough sound, education, and superv
6、ision, and prevention, and punishment, aspects long-term mechanism also enough perfect, especially in enrollment bid work regulatory aspects also needed strengthening; II is regulatory supervision exists lost of Yu wide, and lost of Yu soft, investigation illegal disciplinary case of efforts also ne
7、eded strengthening, individual sector and cadres also different degree exists treat gift, not to benefits not do, and mess do of phenomenon; Three for honest work is the new situations and new problems in finding timely enough, treatment measures are not strong enough. To solve these problems, we wi
8、ll proceed from the following five aspects of rectification, make sure to implement the provisions of the code. (A) deepening the learning, enhance the consciousness of honesty in politics. To create event as an opportunity to Excel and learning party, further increasing the governance capability an
9、d advanced construction, reinforced rules of the broad masses of party members and cadres awareness, sense of responsibility, sense of honor, improve working ability and level of scientific development. Should make full use of meetings, in particular central group learning opportunity, further stren
10、gthening the study and education of the code, the intensive warning education, education the majority of party members and cadres known fear, knew fear, honesty in politics of tension the strings, consciousness and enhancing the implementation of the initiative. Also, pay attention to apply what the
11、y have learned, consciously study results into planning work, new ideas,河南城市快速路立交现浇箱梁高大模板碗扣支架施工方案(详细计算书,2012)【工程概况】 桥梁全长:780.938m 桥梁宽度:25.5m 桥孔布置:(235m)+3(335m)+(32+249+32m)+(235.984+235.985m)+(330m) 上部结构:预应力混凝土斜腹板连续箱梁结构(单箱四室) 施工方式:碗扣式满堂支架逐段现浇施工【内附图表】 1.横梁处剖面图 2.箱梁跨中剖面图 3.碗扣脚手架节点详图 4.碗扣架体搭设详图 5.架体预压
12、示意图 6.碗扣架钢管材料控制流程 7.预应力混凝土连续箱梁施工工艺流程图 含详细计算书,2012年编制XX市XX大道与XX快速通道立交工程现浇箱梁高大模板支撑系统(碗扣架)施工专项方案一、编制依据1、建筑施工碗扣式钢管脚手架安全技术规范(JGJ166-2008)2、建筑施工扣件式钢管脚手架安全技术规范(JGJ130-2011)3、混凝土结构工程施工质量验收规范(GB50204)4、建筑施工脚手架实用手册(中国建筑出版社)5、公路桥涵地基与基础设计规范(JTG D63-2007)6、XX市XX大道与XX快速通道立交工程施工图设计二、工程概况建设单位:XX中建基础设施开发有限公司设计单位:XX建
13、筑设计研究院(集团)有限公司监理单位:XX卓越工程管理有限公司施工单位:中国建筑XX工程局有限公司结构形式:现浇预应力箱梁XX市XX大道与XX快速通道立交工程XX主线桥起点桩号ZXK1+464.684ZXK2+245.622,桥梁长780.938m,宽25.5m,全桥共7联22孔,桥孔布置为(235m)+3(335m)+(32+249+32m)+(235.984+235.985m)+(330m),其中,(32+249+32m)采用变截面预应力混凝土连续箱梁,其余均采用等高度预应力混凝土连续梁。上部结构采用预应力混凝土斜腹板连续箱梁结构,标准桥宽为25.5m,大跨变高度梁梁中支点梁高采用2.8m
14、,其余桥跨梁高均为2.0m,25.5m宽箱梁采用单箱四室,箱梁顶板翼缘悬臂长2.4m,跨中顶板厚度0.22m,跨中底板厚0.22m,跨中腹板厚0.45m,支点处顶板加厚至0.75m,支点处底板加厚至0.42m,支点处腹板加厚至0.75m。该区段连续箱梁结构设计有两种形式,除第五联为变高段连续箱梁,其余为等高段箱梁。为此,依据设计图纸、XX主线桥施工依据相关技术规范、水文、地质情况,并充分结合现场的实际施工状况,为便于该区段连续箱梁的施工,保证箱梁施工的质量、进度、安全,我部采用碗扣式满堂支架组织该区段连续箱梁预应力混凝土逐段现浇施工。为保证架体设计的安全,以及计算的便利,架体搭设高度选择最大高
15、度14m进行计算,箱梁截面选取最大截面进行荷载统计及验算。箱梁横桥向剖面图如下:1)横梁处剖面图(图中标注尺寸单位为:cm)2)箱梁跨中剖面图三、碗扣式满堂架方案简介3.1架体参数该箱梁的碗扣式满堂脚手架组成如下:1)立杆:框架垂直承载杆、立杆上每隔0.6米有一个插座;在箱室部位立杆间距顺桥向0.6m,横桥向0.9m;在横梁和腹板位置因箱梁混凝土厚度较大,立杆进行加密,横梁部位立杆间距顺桥向0.3m,横桥向0.9m;腹板部位顺桥0. 6m,横桥向0.6m。2)横杆:框架水平承载杆、横杆两端各有一个横插头,横杆步距均为1.2m。3)剪刀撑:满堂支架用48无缝钢管做剪刀撑以增强其整体稳定性,架体外
16、侧四周及内部纵、横向每6m8m由底至顶设置竖向剪刀撑。当架体搭设高度在8m以下时,应在架顶部设置连续水平剪刀撑;当架体搭设高度在8m及以上时,应在架体底部、顶部及竖向间隔不超过8m分别设置连续水平剪刀撑。水平剪刀撑宜在竖向剪刀撑斜杆相交平面设置。剪刀撑斜杆接长采用搭接,搭接长度大于1000mm,对接点分在不同跨且长于500mm,与主节点距小于1/3跨。斜杆与立杆或水平横杆采用旋转扣件固定且扣件中心与主节点距离小于150mm。 碗扣脚手架节点详图如下:3.2架体设计简介满堂式碗扣支架体系由支架基础(10cm C15砼层、50cm山皮石分两层、素土分两层,各层压路机碾压密实,原XX大道行车道宽14
17、米范围采用原地面作基础即可),沿线路中心向两侧留2%的横坡,避免支架范围内地面积水。支撑系统由483.5mm碗扣立杆、横杆、斜撑杆、可调节顶托、10cm15cm木方(横向分配梁)、10cm5cm木方(纵向分配梁)组成;模板系统由侧模、底模、芯模、端模等组成。10cm15cm木方分配梁沿横桥向布置,直接铺设在支架顶部的可调节顶托上,箱梁底模板采用定型大块竹胶模板,后背10cm10cm木方,然后直接铺装在10cm15cm、10cm5cm木方分配梁上进行连接固定;侧模、翼缘板模板为竹胶板木模。根据箱梁施工技术要求、荷载重量、荷载分布状况、地基承载力情况等技术指标,通过计算确定,每孔支架立杆布置:纵桥
18、向为:630cm+7660cm+530cm,共计87排(横梁部分30 cm,变截面部分、跨中部分为60 cm,适用于整个立交工程)。横桥向立杆间距为:(120cm+390cm+360cm +390cm +260cm +490 cm+60cm) 2,共34排(即两侧翼缘板(外侧)为120cm,腹板区、箱室连接区域为60cm,翼缘板区、箱室部分为90cm,适用于整个立交工程)。支架立杆步距为120cm,底层纵、横向水平杆作为扫地杆,距地面的高度为35cm,支架的四边与中间每隔5排立杆设置一道纵横向剪刀撑,由底至顶连续设置,两端与中间每隔4排立杆从顶层开始向下每隔3步设置一道水平剪刀撑;支架两端的纵
19、、横杆系通过垫木牢固支撑在桥墩上;立杆顶部安装可调节顶托,立杆底部支立在底托上,底托安置在混凝土面层上,以确保地基均衡受力。曲线箱梁布置时,以折线代替设计曲线,故支架由若干折线组成,折线间用扣件钢管连接,折线长度需保证该段折线与设计曲线所形成的平面弧的矢高小于3cm,经计算每段折线长度取12m。3.3碗扣架体搭设详图3.4架体预压3.4.1支架预压目的为保证箱梁砼结构的质量和施工进度,钢管脚手架支撑搭设完毕后进行预压处理,以消除支架、支撑方木和模板的非弹性变形和地基的压缩沉降影响,同时取得支架弹性变形的实际数值,作为模板的预设值数据设置的参考。在施工箱梁前需进行支架预压和地基非弹性变形试验,采
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