主动控制在三主桁钢桁拱桥施工监控中的应用

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Abstract Research purposes: In accordance with the active control concept，and in combination with construction of the main bridge of the Dongpingshuidao Bridge，the whole constraction stages of the steel truss arch bridge with three main trusses was calculated and analyzed with finite element theory，the objective control value of every stages was determined，the possibility of deviation from the construction control target was analyzed in advance and the the preventive and active control measures were worked out and taken for guiding the bridge erection to complete the bridge construction smoothly and meet the design requirements．

Research conclusions: The theoretical calculation and analysis with the finite element method were carried out for the bridge and the objective control values of every construction stage were determined to obtain the adjustable ranges of the cable force of the buckle cables，the jacking and lowering amount at the support points，the scale of post anchor force and the amount of the counterweight for the side span steel girder to achieve the " pre － control" ． According to the in －situ monitoring values of the geometry，internal force and cable force during the construction，the active control strategies and measures of pre － raising the steel truss members，tensioning the buckle cable and the post anchor cable，temporarily loading the side span steel girder and jacking，lowering and vertical moving the support point were taken to timely adjust the internal force and geometry of the structure for realizing the " process control" to achieve the successful closure of the bridge．

Key words： steel truss arch bridge three main trusses active control construction monitoring

Received: 15 April 2012

PACS:

U445． 1

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	CHEN Jin － zhou
	ZHENG Ping － wei

Cite this article:

CHEN Jin － zhou,ZHENG Ping － wei. Application of Active Control Technique in Monitoring Construction of Steel Truss Arch Bridge with Three Main Trusses[J]. 铁道工程学报, 2012, 29(7): 36-40.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2012/V29/I7/36

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