CN216973078U - A rigid cable-stayed bridge - Google Patents

Abstract

The utility model relates to a rigid cable-stayed bridge, comprising a rigid cable-stayed bridge formed by a steel longitudinal beam (1), a steel bridge tower (2), a steel cable-stayed rod (3), a steel secondary longitudinal beam (7) and a steel transverse beam (8). The skeleton of the bridge is pulled, the surface of the ground line (12) between the subgrades (11) is casted with piers (5), the top of the piers (5) is provided with a support (4), and the abutments are provided at the contact between the subgrade (11) and the steel longitudinal beam (1). (6); a steel cross beam (8) is arranged between the steel longitudinal beams (1); a secondary longitudinal beam (7) is arranged in the middle of the steel transverse beam (8); an opening is provided on the top surface of the steel transverse beam (8) and the steel secondary longitudinal beam (7) A profiled steel plate (9), and a concrete bridge deck (10) is poured on the open profiled steel plate (9). The utility model has the beneficial effects that the utility model can be quickly assembled, pushed simultaneously, can seal the bottom of the bridge deck for construction, has limited influence on the navigable river channel and traffic road under the bridge, short construction period, simple construction process, and clear component force.

Description

A rigid cable-stayed bridge

technical field

The utility model belongs to the technical field of cable-stayed bridge structures, in particular to a rigid cable-stayed bridge.

Background technique

Cable-stayed bridges, as a kind of cable system, have greater spanning capacity than girder bridges, and are the most important bridge type for long-span bridges.

Cable-stayed bridges are high-order statically indeterminate structures, and the construction methods and installation procedures used are closely related to the linear and dead-load internal forces of the main bridge after the bridge is completed. The flexible cable-stayed bridge mainly adopts the cantilever casting or cantilever assembly scheme of the tower first and then the beam, that is, the main beam concrete is cast and forged symmetrically with hanging basket cantilever on both sides of the tower column, or the main beam concrete is poured or assembled in the tower column section first or assembled with a section of rotary lifting The initial beam section of the equipment, and then use suitable lifting equipment to assemble the beam body stage symmetrically from both sides of the tower column; some small spans adopt the construction plan of beam first and then tower, that is, temporary piers are set first, and the main span is converted In order to push the span, after the main girder is prefabricated and pushed in place, the cable towers, hanging cables, tensioning, and temporary piers are poured, and the system conversion process from continuous beams to cable-stayed bridges is completed.

The above-mentioned flexible cable-stayed bridge structural system and cantilever pouring or cantilever assembly and the construction method of the beam first and then the tower are relatively complex, the preparation of each component is long, the structural system is changed many times during the construction process, and the construction process and bridge state are linear and internal force control. It is more difficult, therefore, a rigid cable-stayed bridge with integral push and clear force can be sought.

Utility model content

The purpose of the utility model is to solve the problems of the flexible cable-stayed bridge cantilever pouring or cantilever assembly and the construction plan of the beam first and the tower in the background technology. control and other problems, to provide a simple structure, more reasonable design, fast assembly, simultaneous push, closed bridge deck bottom construction, limited impact on the navigable river channel and traffic road under the bridge, short construction period, simple construction process, and components are affected by A rigid cable-stayed bridge and jacking construction method with clear force.

To achieve the above object, the utility model adopts the following technical solutions:

A rigid cable-stayed bridge, the cable-stayed bridge includes a rigid cable-stayed bridge skeleton formed by a steel longitudinal beam 1, a steel bridge tower 2, a steel cable-stayed rod 3, a steel secondary longitudinal beam 7, and a steel cross beam 8, and the skeleton is on the surface of the roadbed 11. It can be moved longitudinally after the top push device is installed. The steel bridge tower 2 that is arranged vertically is connected to the steel longitudinal beam 1 by welding at the supporting position of the bridge pier 5, and a steel cable tie rod is arranged at a certain distance on both sides of the steel bridge tower 2. 3. It is welded and connected with the steel longitudinal beam 1 and the steel bridge tower 2, and the surface of the ground line 12 between the roadbeds 11 set at both ends is poured with a pier 5 for jacking construction and supporting the steel frame after the bridge is completed. A support 4 for supporting the steel longitudinal beam 1 is fixedly arranged at the top of the bridge pier 5, and a bridge abutment 6 supporting the rigid cable-stayed bridge frame is provided at the contact point between the roadbed 11 arranged on both sides and the steel longitudinal beam 1; A steel cross beam 8 perpendicular to the steel longitudinal beam 1 is evenly arranged between the beams 1; a steel secondary longitudinal beam 7 with an I-shaped section is vertically arranged in the middle of the steel transverse beam 8; the steel cross beam 8 and the steel secondary longitudinal beam 7 top surface A fixed open profiled steel plate 9 is provided, and a concrete bridge deck 10 is poured on the open profiled steel plate 9 .

A jacking construction method of a rigid cable-stayed bridge, the method comprising the following steps:

1) The rigid cable-stayed bridge skeleton composed of steel longitudinal beam 1, steel bridge tower 2, steel cable-stayed rod 3, steel secondary longitudinal beam 7, and steel cross beam 8 takes the abutment 6 and the roadbed 11 as the first support point to push from the roadbed. The surface 11 is pushed out in the direction of the abutment 6 .

2) After pushing the skeleton of the rigid cable-stayed bridge forward through the pier 5, use the pier 5 as the second support point for pushing, and continue to push in the mid-span direction.

3) When the rigid cable-stayed bridge is pushed forward until the axes of the steel bridge tower 2 and the bridge pier 5 coincide, that is, it is pushed in place, and the mid-span closed section is connected to form a continuous system.

The general relationship between the members of the rigid cable-stayed bridge skeleton is: L2=(0.85～1)L1, L3=(0.3～0.5)L1, H=(0.48～0.58)L1. The components are relatively well-stressed and the material utilization rate is high, where: L1 is the length of the steel longitudinal beam between the steel bridge tower and the steel stay; L2 is the mid-span length of the steel longitudinal beam between the steel stay; L3 is the edge The cantilever length at the end of the span steel longitudinal beam; H is the height of the steel bridge tower.

Compared with the prior art, the beneficial effects of the present utility model are as follows: First, the rigid cable-stayed bridge frame members are made of steel, and the processing and manufacturing of the steel members is not limited by the site, and is not affected by the construction period of the lower structure, thus reducing the processing and manufacturing of the components. cycle. Second, the construction efficiency of jacking is high, the construction period is greatly shortened, the process is simple, the linearity of the completed bridge is easy to control, and the force of the components in the construction and bridge state is clear. Third, the open profiled steel plate, the steel longitudinal beams and the steel transverse beams form a bridge deck construction space with a closed bottom surface, which will not affect the structures under the bridge, especially to avoid the impact on the navigable rivers and roads. Fourth, the rigid cable-stayed bridge adopts a light-weight and high-strength steel structure, which has outstanding seismic performance and has great advantages in high-intensity earthquake areas.

Description of drawings

Fig. 1 is the elevation view of a kind of rigid cable-stayed bridge of the present utility model;

2 is a plan view of a rigid cable-stayed bridge deck system of the present utility model;

Fig. 3 is the vertical section view of the combination of open profiled steel plate and concrete bridge deck;

Fig. 4 is the process schematic diagram of the jacking construction method of rigid cable-stayed bridge;

Figure 5 is the main flow chart of the jacking construction method of the rigid cable-stayed bridge.

In the figure: steel longitudinal beam 1, steel bridge tower 2, steel stay rod 3, support 4, bridge pier 5, abutment 6, steel secondary longitudinal beam 7, steel cross beam 8, open profiled steel plate 9, concrete bridge deck 10, Subgrade 11, ground line 12, length L1 of steel longitudinal beam between steel bridge tower and steel stay rod, mid-span length L2 of steel longitudinal beam between steel stay rod, cantilever length L3 at the end of steel longitudinal beam of side span, steel bridge Tower height H.

Detailed ways

The technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in Figures 1 and 4, the present utility model includes a rigid cable-stayed bridge skeleton composed of a steel longitudinal beam 1, a steel bridge tower 2, a steel cable-stayed rod 3, a steel secondary longitudinal beam 7, and a steel transverse beam 8, and specifically includes a longitudinal arrangement On the surface of the subgrade 11 at both ends, a box-shaped section of equal section is adopted, and a steel longitudinal beam 1 that moves longitudinally after a pushing device can be arranged on the surface of the subgrade 11, and the surface of the steel longitudinal beam 1 symmetrically arranged at both ends is vertically fixed. A steel bridge tower 2 is provided, and a steel cable tie rod 3 is fixedly arranged at a certain distance on both sides of the steel bridge tower 2. On the surface of the ground line 12 between the roadbeds 11 set at both ends, a surface is poured for jacking construction and after the bridge is completed. The bridge pier 5 that supports the steel longitudinal beam 1, the steel bridge tower 2 and the steel stay rod 3 is fixedly provided with a support 4 for placing the steel longitudinal beam 1 at the top of the bridge pier 5, and the roadbed 11 located at both ends is provided. A bridge abutment 6 supporting the rigid cable-stayed bridge skeleton is arranged at the contact position with the steel longitudinal beam 1; a steel transverse beam 8 is evenly and fixedly arranged perpendicular to the steel longitudinal beam 1, and an open profiled steel plate 9 is fixedly arranged between the steel transverse beams 8 , a concrete bridge deck 10 is poured between the open profiled steel plate 9 and the steel beam 8; Steel longitudinal beams 1, steel bridge towers 2, and steel cable-stayed rods 3 are all welded to form a rigid cable-stayed bridge skeleton; supports 4, piers 5, and abutments 6 are cast or installed on site and form the support points for jacking construction; steel Longitudinal beam 1 adopts a box-shaped section of equal section, which can be assembled and welded by steel plates, or can be welded and lengthened by rectangular section steel; 1. A large section is used for the connection, and a small section is used towards the top of the tower, which is formed by assembling and welding steel plates; the pier 5 and the abutment 6 are generally formed by on-site pouring of concrete; the bearing 4 is generally a large-tonnage spherical steel bearing.

The described steel beam 8 is connected with the steel longitudinal beam 1 and the secondary longitudinal beam 7 by welding to form the bridge deck skeleton; The template for cast-in-place construction of bridge deck 10; the secondary longitudinal beam 7 adopts a relatively short welded I-shaped section; the middle of the steel beam 8 adopts a welded I-shaped section, and the end and the top of the pier adopt an equal-section box-shaped section The opening direction of the open profiled steel plate 9 is the transverse bridge direction; the thickness of the concrete bridge deck 10 is between 24 and 30 cm; the ground line 12 is the contour line of the river channel and the river beach.

A jacking construction method of a rigid cable-stayed bridge, the method comprising the following steps:

1) The skeleton of the rigid cable-stayed bridge composed of the steel longitudinal beam 1, the steel bridge tower 2, the steel cable-stayed rod 3, the steel secondary longitudinal beam 7 and the steel cross beam 8 is pushed from the abutment 6 and the roadbed 11 as the first supporting point. The surface of the roadbed 11 is pushed out in the direction of the abutment 6;

2) After the skeleton of the rigid cable-stayed bridge is pushed forward through the pier 5, the pier 5 is used as the second support point for pushing, and continues to push in the mid-span direction;

3) When the rigid cable-stayed bridge is pushed forward until the axes of the steel bridge tower 2 and the bridge pier 5 coincide, that is, it is pushed in place, and the mid-span closed section is connected to form a continuous system.

The length L1 of the steel longitudinal beam between the steel bridge tower and the steel stay rod, the middle span length L2 of the steel longitudinal beam between the steel stay rod, the cantilever length L3 at the end of the side span steel longitudinal beam, and the general height H of the steel bridge tower The relationship is:

L2=(0.85～1)L1, L3=(0.3～0.5)L1, H=(0.48～0.58)L1.

As shown in Figure 2, steel longitudinal beams 1, secondary longitudinal beams 7, steel transverse beams 8, open profiled steel plates 9, and concrete bridge decks 10 form a bridge deck system; steel transverse beams 8 are welded to steel longitudinal beams 1, secondary longitudinal beams After the beams 7 are connected, the bridge deck skeleton is formed, and the open profiled steel plates 9 are anchored by shear nails and welded on the steel beams 8, as the template for the cast-in-place construction of the concrete bridge deck 10; the secondary longitudinal beams 7 are welded with shorter ones. The I-shaped section is used to strengthen the robustness of the bridge deck system and prevent the slump and deformation of the concrete bridge deck 10 when it is cast-in-place. The number can be set according to the width of the bridge deck. The distance between the steel beams 8 is about 2 times; the steel beams 8 in the middle of the bridge span are generally welded I-shaped sections, and the ends of the bridge spans and the top of the piers are box-shaped sections of equal section, and the distance is generally about 3 to 6m. When larger, steel beams 8 with different heights can be arranged at intervals in the middle part.

As shown in FIG. 3 , the open profiled steel plate 9 and the concrete bridge deck 10 constitute the roadway slab. The opening direction of the open profiled steel plate 9 is the transverse bridge direction. The thickness of the concrete bridge deck 10 is determined according to different traffic loads and the spacing between the steel beams 8, which is generally between 24 and 30 cm. The top and bottom layers are equipped with horizontal two-way steel bars. After the strength is required, the asphalt concrete surface layer is laid on it.

As shown in FIG. 5 , it is the main flow chart of a jacking construction method of a rigid cable-stayed bridge of the present invention.

The utility model relates to a rigid cable-stayed bridge and a jacking construction method. The skeleton components of the utility model are made of steel, and the processing and manufacture are not limited by the site. The transportation to the bridge position is not affected by the construction of the pier 5, the abutment 6 and the roadbed 11, and can be carried out simultaneously; The skeleton of the rigid cable-stayed bridge forms a self-stabilizing system, which can meet the bidirectional bending performance requirements of the cross-section during the conversion of single cantilever and simply supported systems during the jacking process. The steel plate 9 is used as the formwork for the cast-in-place construction of the concrete bridge deck 10, and the steel longitudinal beams 1 that can be used as the bridge side guardrail form a closed construction space at the bottom of the bridge deck, which will not affect the structures under the bridge, especially to avoid Impact on navigable rivers and roads.

To sum up, the utility model provides a rigid cable-stayed bridge and a jacking construction method, which realizes the bridge structure and construction scheme spanning the navigable river channel and the passing road that can be quickly assembled, simultaneously jacked, and bridge deck closed construction, and greatly shorten the construction time. It has high technical, economic and social benefits.

At the same time, for a rigid cable-stayed bridge and a jacking construction method disclosed in the present invention, the above-mentioned embodiments are more suitable embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments. Any changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention should be equivalent replacements and are included within the protection scope of the present invention.

Claims (2)

1. A rigid cable-stayed bridge, characterized in that: the cable-stayed bridge comprises a steel longitudinal beam (1), a steel bridge tower (2), a steel cable-stayed rod (3), a steel secondary longitudinal beam (7), a steel transverse beam ( 8) The rigid cable-stayed bridge skeleton formed, the skeleton can be moved longitudinally after the jacking device is installed on the surface of the roadbed (11), and the vertically arranged steel bridge tower (2) is connected with the steel longitudinal beam at the supporting position of the bridge pier (5). (1) Welding connection, steel tie rods (3) and steel longitudinal beams (1) and steel bridge towers (2) are welded and connected at a certain distance on both sides of the steel bridge tower (2). The surface of the ground line (12) between (11) is poured with a pier (5) used for jacking construction and supporting the steel frame after the bridge is completed, and a steel longitudinal beam for supporting the steel longitudinal beam is fixed on the top of the pier (5). The support (4) of (1) is provided with an abutment (6) supporting the rigid cable-stayed bridge frame at the contact point between the roadbed (11) arranged on both sides and the steel longitudinal beam (1); on the steel longitudinal beam (1) A steel cross beam (8) perpendicular to the steel longitudinal beam (1) is evenly arranged between ); a steel secondary longitudinal beam (7) with an I-shaped section is vertically arranged in the middle of the steel cross beam (8); the steel cross beam (8) ) and the top surface of the steel secondary longitudinal beam (7) are provided with a fixed open profiled steel plate (9), and a concrete bridge deck (10) is poured on the open profiled steel plate (9). 2. A rigid cable-stayed bridge as claimed in claim 1, characterized in that: the steel beam (8) adopts a box-section structure at the end of the bridge body and the top of the pier, and the rest of the bridge body adopts an I-shaped cross-section. cross-sectional structure.

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