人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
19期
25-28,59
,共5页
方国宝%宋志忠%王程%路万锋
方國寶%宋誌忠%王程%路萬鋒
방국보%송지충%왕정%로만봉
底板%预留宽缝%仿真计算%防洪闸%荆江大堤
底闆%預留寬縫%倣真計算%防洪閘%荊江大隄
저판%예류관봉%방진계산%방홍갑%형강대제
bottom floor%preserved wide construction joints%simulation calculation%flood control sluice%Jingjiang Dike
软土地基上的防洪闸闸室常采用坞式结构,其底板一般采用传统的整体式浇筑方法施工,这种施工方法虽使结构的整体性好、地基反力分布均匀,但底板受力状态较差,顶部拉应力大,容易出现不同程度的裂缝,进而影响建筑物的正常使用。荆江大堤防洪闸共两孔,采用整体“W”型结构,单孔净宽32.0 m,闸室总宽度84.0 m。为防止底板出现裂缝,设计提出施工期间在底板上预留宽缝,并采用“墩底分浇、预留宽缝、后期封合”的施工方法。计算分析表明,采用这种施工方法后,底板的受力状态较整浇时得到了明显改善。工程完工后近2a的监测数据表明,防洪闸运行情况良好,底板受力状态较好,底板表面基本无裂缝。
軟土地基上的防洪閘閘室常採用塢式結構,其底闆一般採用傳統的整體式澆築方法施工,這種施工方法雖使結構的整體性好、地基反力分佈均勻,但底闆受力狀態較差,頂部拉應力大,容易齣現不同程度的裂縫,進而影響建築物的正常使用。荊江大隄防洪閘共兩孔,採用整體“W”型結構,單孔淨寬32.0 m,閘室總寬度84.0 m。為防止底闆齣現裂縫,設計提齣施工期間在底闆上預留寬縫,併採用“墩底分澆、預留寬縫、後期封閤”的施工方法。計算分析錶明,採用這種施工方法後,底闆的受力狀態較整澆時得到瞭明顯改善。工程完工後近2a的鑑測數據錶明,防洪閘運行情況良好,底闆受力狀態較好,底闆錶麵基本無裂縫。
연토지기상적방홍갑갑실상채용오식결구,기저판일반채용전통적정체식요축방법시공,저충시공방법수사결구적정체성호、지기반력분포균균,단저판수력상태교차,정부랍응력대,용역출현불동정도적렬봉,진이영향건축물적정상사용。형강대제방홍갑공량공,채용정체“W”형결구,단공정관32.0 m,갑실총관도84.0 m。위방지저판출현렬봉,설계제출시공기간재저판상예류관봉,병채용“돈저분요、예류관봉、후기봉합”적시공방법。계산분석표명,채용저충시공방법후,저판적수력상태교정요시득도료명현개선。공정완공후근2a적감측수거표명,방홍갑운행정황량호,저판수력상태교호,저판표면기본무렬봉。
The dock structure was often adopted for the chamber structure of flood control sluice on the soft foundation, and the conventional integral pouring method was used for bottom floor construction. Although the entirety of this structure is good, and the foundation reaction force distributes uniformly, the stress state of the floor is poor with large tension stress at top, so cracks may occur at different degree, which can affect the normal operation of the structure. Two outlets were adopted by flood control sluice in Jingjiang Dike in W shape with each width of 32. 0 m, and the total chamber width of 84. 0 m. In order to prevent the cracks at bottom floor, the wide construction joints were preserved in pouring construction, and the method of"separately pouring for pier bottom, setting up wide construction joints and closing in later period" was adopted. The calculation results show that the stress state of bottom floor during pouring was improved. The monitoring data for 2 years show that the flood control sluice has been running in good condition, the stress state of bottom floor is better, and no cracks occurred at the surface of the bottom floor.