zn采用顶推施工法在弯道及竖曲线上架设预应力钢筋混凝土箱梁桥_secret.doc
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1、We will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of ev
2、aluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication zero resistan
3、ce. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to
4、perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure zero. To strengthen
5、ing Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medic
6、al, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of
7、zero risk. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to imple
8、mentation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize
9、trading, and strive to achieve according to law, standardize and fair. Innovation of performance management, to ensure that potential employees zero fly. To strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance ma
10、nagement. To further quantify and refine employee standards . Work, full play party, and branch, and members in five type Enterprise construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening four good leadership construction, full play levels
11、cadres in enterprise development in the采用顶推施工法在弯道及竖曲线上架设预应力钢筋混凝土箱梁桥(日) 1.绪言 佐波川桥邻近山口县德地立交枢纽。全桥长206.35m。其中河中部分的长度为150.35m,由4跨预应力混凝土连续箱梁组成。旱地部分的长度为56m,由3跨钢筋钢筋混凝土空心板梁组成。 本文只论述关于该桥河中部分的预应力钢筋混凝土连续梁桥。 1)由于本侨上游佐波用水库的放水,河床支撑不可使用。 2)减少施工工序 等的条件来判断,决定采用施工和安全上优良的、施工时能够确保梁下空间的顶推施工方法。 另外,本桥在平面的布置上,有R580m的圆弧同A300
12、的辐射螺旋线,纵断面上有从-3%到+4%的纵坡,横断面坡度为变化于5%到2%的单向坡度。这些线形要素,特别增加了顶推施工法的难度。 在这里将佐波川桥中,用顶推施工法施工的预应力桥的设计施工计划做一报道。 2.顶推施工法 本桥实施的顶推方式,叫做TL施工法,是西德的莱昂哈特事务所研制的方式,在桥台的后方准备浇筑混凝土的模板设备,所以每1020m一节,一边浇筑桥体混凝土,一边连接梁体,依靠在一个地方设置的顶推装置,顺次顶推,使连续梁在设置在桥墩的滑动支承上滑行。 本施工法的特点有:临时设备少可以解决;能够缩短工期不受气候的影响,全天开展作业;作业场所在一定范围里集中,而且由于同一作业反复操作,施工
13、管理是容易的;在架设时能够完全确保梁下空间。 3.工程概要 关于日本道路公团在纵贯中国的汽车道的山口县德地镇地区内架设的佐波川桥的工程概要,说明如下: 下部构造采用天然基础方式。墩台身构造,A1桥台是扶壁型,其他桥墩是倒T形,墩高是1013m。 工程名称:中国汽车道路佐波川桥(预应力混凝土上部构造)工程。 路 线 名:中国纵贯汽车道路 桥 长:150.35m 梁 长:150.15m 跨 径:37.1m237.5m37.0m 有效宽度:28.5m(上下线分开方式) 结构型式:预应力4孔连续箱梁桥 架设方法:T.L(莱昂哈特)方式顶推施工法 施 工 者:预应力混凝土公司 4.设计概要 1)设计条件
14、 本桥的设计是根据日本道路协会(道路桥规范III混凝土桥编)及日本道路公团(设计要领)设计的。并且考虑支点的不均匀下沉10mm。动荷载按拖挂荷重(TT43)考虑。在验算桥面板时,是按照活荷重的弯曲力矩增加二成。表1所示为主要材料的强度及容许强度: 关于表1中架设时的容许弯曲拉力强度 15kg/cm2,因考虑顶推中的冲击,滑动支承的不均匀下沉等,对于道路桥规范标准的值,确定要有10kg/cm2的富余。 2)主梁断面的决定 21 梁高用顶推法架设连续梁时的梁高,为了对待在架设中发生的正负交替的弯曲力矩,一般比采用就地浇筑施工方法的连续梁的梁高(跨径1/201/22)要高,通常为跨径的1/161/1
15、8左右。本桥的梁高,标准断面的梁高是2.2m,最大计算跨径37.5m的1/17。另外各断面的实际梁高有桥面线形和梁下面顶推用的圆弧滑动面之差。表1 材料强度设计标准强度400kg/cm2插入标准强度325kg/cm2混凝土容许弯曲压应力设计荷重时140kg/cm2架设时180kg/cm2容许弯曲拉应力架设时-15kg/cm2静荷重作用时0kg/cm2设计荷重作用时-15kg/cm2最大剪应力强度容许剪应力强度最终荷重作用时53kg/cm2设计荷重作用时5.5kg/cm2容许主拉应力设计荷重时-10kg/cm2考虑扭矩-13kg/cm2预应力钢筋预应力钢材的种类SEEEF16032A种2号拉力强
16、度165kg/mm2105kg/mm2屈服点应力140kg/mm280kg/mm2容许拉力设计荷重时9960插入时12672插入后115.568 22 面板厚 顶板厚度要根据面板发生的弯矩而定,但因用顶推施工法时,顶板上要配置架设用的预应力钢材,所以确定厚度时,要考虑架设用的预应力钢材固定部分与边缘的距离及与面板横向固紧的预应力钢材的交差等情况。关于底板因为也要进行同样的考虑。本桥顶板厚度为28cm,底板厚度为25cm。 23 腹板厚 腹板厚度的决定要能满足箱梁的刚度,对于剪力要使具有足够的抗剪力。但在顶推时,考虑架设中的剪力是必要的。另外,如本桥这样,采用内部方式,在腹板内配置连续用的预应力
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