Method for actively reinforcing wide-span concrete case beam bridge web
A concrete box girder and long-span technology, applied in bridge reinforcement, bridge, bridge construction, etc., can solve problems such as inapplicable tensioning method, difficulty in laying out tensioning equipment, and inability to improve the use stress condition
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[0039] The following takes the reinforcement of the webs of the concrete continuous box girder bridge of the Huanghuan Bridge in Lanxi, Zhejiang Province as an example to illustrate the specific implementation method of the present invention in detail.
[0040] The Lanxi Huanghuan Bridge in Zhejiang Province is located on the Lanjiang River on the west side of Lanxi City. It was completed and opened to traffic in July 1997. The main bridge of the bridge is 344m long, with a combined span of 52m+3×80m+52m. The upper structure is a prestressed concrete continuous box girder bridge, the box girder is made of C50 concrete, the single-box single-chamber section, box width 8m, box girder top width 15.7m, flange plate width 3.85m, fulcrum box girder height 5m, mid-span girder height 2.4 m, the thickness of the web is gradually changed from 60cm at the fulcrum to 35cm in the middle of the span, see figure 1 with figure 2 Shown.
[0041] After testing, the middle part of the bridge span ...
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