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Construction method of side span main girder of cable-stayed bridge

A construction method and technology for cable-stayed bridges, which are applied in cable-stayed bridges, bridges, bridge construction, etc., can solve the problems of increasing the risk of overturning accidents of the side span main girder body, small diameter or width, etc., so as to enhance the anti-overturning ability. , High construction safety, the effect of ensuring construction safety

Active Publication Date: 2019-04-09
ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the main bridge piers, the supporting pier columns supporting the side-span main girders are generally smaller in diameter or width, which means that the supporting pier columns of the side-span main girders resist the unevenness of the side-span main girder during the pouring process. The ability to balance the load is low, and because the unbalanced load generated during the construction of the side span main girder during the construction process of the hanging basket needs to be carried by the supporting pier columns of the side span main beam, so the hanging basket is used to support the side span When the main girder is under construction, this also increases the risk of overturning accidents of the side-span main girder due to the unbalanced load on the side-span main girder during the construction process

Method used

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  • Construction method of side span main girder of cable-stayed bridge
  • Construction method of side span main girder of cable-stayed bridge
  • Construction method of side span main girder of cable-stayed bridge

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Embodiment 1

[0030] see Figure 1-Figure 3 , which shows the construction steps of the side span main beam of the cable-stayed bridge provided by the present invention, which specifically includes:

[0031] S1, carry out the construction of the main beam supporting piers of the cable-stayed bridge, and the supporting piers at least include a main tower and an auxiliary pier;

[0032] like figure 1 , The supporting piers of the main beam of the side span of the cable-stayed bridge include the main tower 5, the auxiliary pier 1 and the abutment 6, of which the auxiliary pier is a thin-walled hollow pier, and the half-width pier body is a box-shaped equal section. Before the construction of the main tower 5, the auxiliary piers 1 and the bridge abutments 6, the construction steps of the caps of the supporting piers are also included, and the caps and the supporting piers of the supporting piers are all completed by cast-in-place construction. .

[0033] S2, pouring a pier top beam section ...

Embodiment 2

[0057] Figure 4 for figure 2 The enlarged view of the auxiliary pier and the pier top beam section with the temporary anchoring structure added in the middle part A. like Figure 4 As shown in the figure, in the step of assisting the construction of the pier body of the first embodiment, it also includes the step of setting a temporary anchoring structure 12 to prevent the main girder from overturning during the construction of the main girder, wherein the temporary anchoring structure 12 includes: The support structure between the support pier and the pier top beam section for resisting the vertical pressure from the continuous beam and the anti-overturning structure for resisting the unbalanced moment generated during the pouring of the main beam, the anti-overturning structure The structure includes steel pipe piles arranged around the support pier and fastening steel bars connecting the steel pipe piles and the top beam section of the pier.

[0058] The temporary anch...

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Abstract

The invention discloses a construction method of a cable stayed bridge side span main beam. The method comprises the following steps that the construction of a cable stayed bridge main beam support pier is performed, wherein the support pier at least comprises a main tower and an auxiliary pier; a pier top beam section is cast on the top end of the support pier; a hanging basket is arranged on the pier top beam section; the hanging basket is used; in addition, the side span main beam extends in the bridge direction towards the extending edge by using the auxiliary pier as the center; the side span main beam is merged with a transition beam section pre-installed on the main tower so as to complete the side span main beam construction. By using the technical scheme disclosed by the invention, after the pier construction is completed, the hanging basket is used for performing construction on the bridge side span, so that the bridge side span construction is not limited by terrain; the installation of a great number of support frames is reduced; the construction work procedure is simple, convenient and fast; the construction speed can be accelerated; the engineering work period can be reduced.

Description

【Technical field】 [0001] The invention relates to the field of bridge construction, in particular to the field of construction procedures and construction methods for side span main beams of cable-stayed bridges. 【Background technique】 [0002] The side span of the bridge is the span between the abutment and the pier. At present, the construction of the main beam of the side span of the bridge is often carried out by the full-house bracket method. The full-house bracket method is a construction method of scaffolding that is densely erected at certain intervals and plays a supporting role; the bracket method construction is to erect brackets at the bridge position, pour bridge concrete on the brackets, and remove the formwork and brackets after the concrete reaches its strength. The support method construction has many shortcomings, which are manifested in the large consumption of the support formwork used for construction and the long construction period, which have great li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D11/04E01D19/00
CPCE01D11/04E01D19/00E01D21/00
Inventor 刘怀刚高世强安邦庄值政孙战赢张凤凰费永忠肖向荣赵升辉檀兴华张铮葛纪平
Owner ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD