CAJ | 학술논문

由于目标单一的桥梁施工控制方法不适合指导V形墩刚构桥“墩底辅助顶推”合龙施工，为了保证成桥结构线形和内力状态同时达到设计要求，以上海轨道交通16号线泐马河大桥为例，采用顶推力与位移进行双控。通过有限元软件桥梁博士建模，计算各顶推阶段结构的变形和受力，确定各控制指标的理论控制目标和误差允许值，并监测这些指标实际的变化规律。结果表明：实际线形与理论线形吻合，中跨跨中最大误差23mm，边跨合龙误差小于11mm，合龙精度满足规范要求；成桥结构受力状态与设计结果一致，顶推力在允许的误差范围内，结构处于安全可控状态。
유우목표단일적교량시공공제방법불괄합지도V형돈강구교“돈저보조정추”합룡시공，위료보증성교결구선형화내력상태동시체도설계요구，이상해궤도교통16호선륵마하대교위례，채용정추력여위이진행쌍공。통과유한원연건교량박사건모，계산각정추계단결구적변형화수력，학정각공제지표적이론공제목표화오차윤허치，병감측저사지표실제적변화규률。결과표명：실제선형여이론선형문합，중과과중최대오차23mm，변과합룡오차소우11mm，합룡정도만족규범요구；성교결구수력상태여설계결과일치，정추력재윤허적오차범위내，결구처우안전가공상태。
The construction control methods of singular target for bridges are not suitable for guidance of the closure construction of a V‐shaped pier rigid‐frame bridge aided by jacking at pier footings .To ensure that the structural geometric shapes and internal force state of the completed V‐shaped pier rigid‐frame bridge could meet the design requirements ,the Lema Creek Bridge on the Rail Transit Line No .16 in Shanghai was taken as a case study ,the control method of both the jacking forces and displacement was used for the bridge .The model of the bridge was established by the finite element software Doctor Bridge ,the structural deformation and internal forces at dif‐ferent jacking construction stages were calculated .The theoretic control targets and allowable er‐ror values of the various control indices were determined and the actual changing laws of these indi‐ces were monitored .The results of the monitoring indicate that in the jacking process ,the actual and theoretic geometric shapes of the bridge are consistent , the maximum closure error of the midspan of the central span is 23 mm and the closure error of the side span is less than 11 mm .The accuracy of the closure of the bridge can meet the relevant requirements in the codes ,the structural internal force state of the completed bridge is consistent with the results of the design ,the jacking forces are still within the range of the allowable errors and the structure is in the safe and control‐lable state .