CN103526698B - Cast-in-cantilever construction 0# block concrete supporting system and construction method - Google Patents

Abstract

This patent relates to a cantilever pouring construction 0# block concrete support system and construction method, including: Shun bridge triangular bracket installed on the bridge pier, Shun bridge triangular bracket includes Shun bridge triangular bracket horizontal bar and Shun bridge triangular bracket oblique The horizontal bar is equipped with cross-bridge section steel; the anti-overturning support piers are arranged on both sides of the bridge pier along the direction of the bridge, and at least two are arranged on each side; the section steel truss between the anti-overturning support piers is fixed on one side of the bridge pier Between the anti-overturning piers; the anti-overturning buttress cross-bridge triangular support is installed on the pier and distributed along the lateral bridge direction outside the pier; the horizontal bar is placed on the steel truss or on the steel truss On the triangular bracket; the roots of the horizontal bar and the oblique bar of the triangular bracket of the Shun bridge are connected to the steel components fixed by the high-strength fine-rolled threaded steel bars in the reserved holes on the pier. The advantages are: this patent can reduce the span of the horizontal bar of the triangular bracket, optimize the force of the triangular bracket, ensure the safety of the 0# block concrete construction, and at the same time, it will not bury hidden dangers to the corrosion of the steel bars of the bridge pier.

Description

Cantilever pouring construction 0# block concrete support system and construction method

technical field

This patent belongs to the technical field of bridge construction, and in particular relates to a cantilever pouring construction 0# block concrete support system and a construction method.

Background technique

In the cantilever cast concrete continuous beam, in order to ensure the stability of the T structure and prevent it from overturning during the construction process, the 0# block and the pier should be temporarily consolidated. When the pier is not high, steel pipe concrete and reinforced concrete supports can be set on both sides of the pier as a temporary consolidation structure for the 0# block to resist overturning.

If the dimension of the bridge cap along the bridge direction is less than the length of block 0#, the construction platform and support system for the installation of concrete formwork of block 0# and the pouring of concrete can be adopted by setting triangular brackets processed with section steel on both sides of the bridge pier.

When the 0# block is longer and the height is larger, the internal force and deformation of the triangular bracket are relatively large. In order to reduce the internal force and deformation of the triangular bracket, it is necessary to increase the number of triangular brackets or increase the number of triangular brackets used to make triangular brackets. The size of the section steel, and strengthen the connection between the horizontal bar of the triangular bracket, the root of the diagonal bar and the pier.

In the past, the horizontal bars and oblique bars of the brackets often used pre-embedded steel plates and pre-embedded section steels in the pier. The positions of the pre-embedded steel plates and section steels should not be controlled during construction. Finally, it is necessary to carry out anti-corrosion treatment on the pre-embedded steel plate and pre-embedded section steel to prevent corrosion of the steel bars of the pier. The workload is heavy and the effect is not good.

Contents of the invention

This patent provides a cantilever pouring construction 0# block concrete support system and construction method to solve the technical problems in the known technology. The support system and construction method can reduce the span of the horizontal bar of the triangular bracket and reduce the internal force of the triangular bracket. And deformation, reduce the amount of materials, optimize the force of the triangular bracket, so as to ensure the safety of 0# block concrete construction.

A cantilever pouring construction 0# block concrete support system, comprising a Shun bridge triangular bracket, said Shun bridge triangular bracket comprising a Shun bridge triangular bracket horizontal bar and a Shun bridge triangular bracket oblique bar, said Shun bridge triangular bracket installed On the pier, the horizontal bar of the triangular bracket of the Shun bridge is provided with cross-bridge section steel, which is characterized in that: it also includes:

Anti-overturning buttresses, the anti-overturning buttresses are arranged on both sides of the bridge pier along the bridge direction, and at least two anti-overturning buttresses are arranged on each side of the bridge pier along the bridge direction;

The steel truss between the anti-overturning piers, the steel truss between the anti-overturning piers is fixedly installed between the anti-overturning buttresses on the side of the bridge pier along the direction of the bridge;

anti-overturning buttress transverse bridge to the triangular bracket, said anti-overturning buttress transverse bridge towards the triangular bracket is mounted on the anti-overturning buttress, and the anti-overturning buttress along each side of the pier is away from the other anti-overturning buttress on that side The direction of cross-bridge distribution;

The horizontal bar of the triangular bracket along the bridge rests on the steel truss between the anti-overturning piers or on the steel truss between the anti-overturning piers and the cross-bridge triangular support of the anti-overturning piers.

This patent can also adopt the following technical solutions:

Preferably, the inclined bar of the triangular bracket of the Shun bridge and the horizontal bar of the triangular bracket of the Shun bridge are installed on the section steel assembly near the pier, and each pair of section steel assemblies located on both sides of the pier and connected along the bridge direction are passed through high-strength finish-rolled threaded steel bars Tensioned and fixed on the pier, the high-strength finish-rolled rebar passes through the reserved holes on the pier.

The technical scheme of the construction method of the support system provided by this patent to solve the prior art is:

A construction method of the support system according to claim 1 or 2, comprising the following steps in turn:

S1. Pouring the bridge pier 7, reserve holes for the tie rods when pouring the bridge pier, install the anti-overturning pier 3, and pour concrete inside the anti-overturning pier;

S2. Install the steel truss 9 between the anti-overturning buttresses on the top of the anti-overturning buttresses, weld the steel truss between the anti-overturning buttresses and the anti-overturning buttresses, and weld the triangular bracket 8 of the transverse bridge of the anti-overturning buttresses;

S3. Penetrate the high-strength fine-rolled threaded steel bar 7 in the hole of the tie rod of the bridge pier, and connect the section steel components 6 on both sides of the bridge pier to the pier with steel bars, and place the triangular bracket welded on the ground on the pier and connect the roots of the horizontal bar 1 of the triangular bracket of the Shun bridge and the oblique bar 2 of the triangular bracket of the Shun bridge to the section steel components installed on the pier, and install the triangular Bracket 5;

S4. On the upper surface of the anti-overturning support pier transverse bridge to the triangular support and the bridge pier transverse bridge to the triangular support, lay the along-bridge section steel, the top surface of the along-bridge section steel and the top surface of the along-bridge triangular bracket are flush, and then lay the along-bridge section steel On the top surface and the top surface of the triangular bracket along the bridge direction, the cross-bridge section steel is arranged according to the spacing, and the steel pipe bracket with adjustable jacking is installed on the cross-bridge section steel, and the square timber and the bottom form are laid on top, so as to form the 0# block of cantilever pouring construction Concrete support system.

The advantages and positive effects that this patent has are:

Since this patent adopts the above-mentioned technical scheme, it can meet the condition that the dimension of the bridge cap in the direction of the bridge is less than the length of block 0#, make full use of the anti-overturning pier, and reduce the span of the horizontal bar of the triangular bracket in the direction of the bridge, thereby reducing the length of the triangle in the direction of the bridge. The internal force and deformation of the bracket and the connecting stress of the horizontal bar of the triangular bracket, the root of the oblique bar and the pier, while saving materials, greatly enhance the construction safety of the 0# block.

When pouring concrete with piers, holes are reserved for the tie rods, and the steel components are connected with high-strength fine-rolled threaded steel bars. The construction is simple, no pre-embedded steel plates and steel plates are required, and there will be no hidden dangers to the corrosion of the steel bars of the bridge piers, and all materials can be used repeatedly. .

Description of drawings

Fig. 1 is the structural representation of this patent;

Fig. 2 is a cross-sectional schematic diagram of the patent, wherein the pier and the parts installed on the pier are not shown;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is a cross-sectional schematic view of a pier and components installed on the pier of this patent.

In the figure: 1. The horizontal bar of the triangular bracket of the Shun Bridge; 2. The inclined bar of the triangular bracket of the Shun Bridge; 3. The anti-overturning pier; ; 7. High-strength fine-rolled threaded steel bar; 8. Triangular support for anti-overturning pier transverse bridge; 9. Sectional steel truss between anti-overturning pier; 10. Bridge pier;

Detailed ways

In order to further understand the invention and creation content, characteristics and effects of this patent, the following examples are exemplified, and detailed descriptions are as follows in conjunction with the accompanying drawings:

As shown in Figure 1-4,

A cantilever pouring construction 0# block concrete support system, including the Shun bridge triangular bracket, the Shun bridge triangular bracket includes the Shun bridge triangular bracket horizontal bar 1 and the Shun bridge triangular bracket oblique bar 2, and the Shun bridge triangular bracket is installed on the bridge pier On the horizontal bar of the triangular bracket along the bridge, there is a cross-bridge section steel 4, which also includes:

Anti-overturning buttresses 3, the anti-overturning buttresses are arranged on both sides of the bridge pier along the bridge direction, and at least two anti-overturning buttresses are arranged on each side of the bridge pier along the bridge direction;

The steel truss 9 between the anti-overturning piers, the steel truss between the anti-overturning piers is fixedly installed between the anti-overturning buttresses on the side of the bridge pier along the direction of the bridge;

The anti-overturning buttress transverse bridge to the triangular bracket 8, the anti-overturning buttress transverse bridge towards the triangular bracket is installed on the anti-overturning buttress, and the anti-overturning buttress along each side of the pier is far away from the other anti-overturning buttresses on that side Direction cross-bridge distribution;

The horizontal bar of the triangular bracket of the bridge is placed on the steel truss between the anti-overturning piers, or on the steel truss between the anti-overturning piers and the triangular bracket of the transverse bridge of the anti-overturning piers.

Preferably, one end of the triangular bracket slant bar of the Shun bridge and the horizontal bar of the triangular bracket of the Shun bridge is installed on the section steel assembly 6, and each pair of section steel assemblies located on both sides of the pier and connected along the bridge direction passes through the high-strength finish-rolled threaded steel bar 7 Tensioned and fixed on the pier, the high-strength finish-rolled rebar passes through the reserved holes on the pier.

In addition, the pier cross-bridge triangular bracket 5 can also be arranged on both sides of the bridge pier in the cross-bridge direction, and the along-bridge section steel 11 can also be laid on the pier cross-bridge triangular bracket 5 and the anti-overturning pier cross-bridge triangular bracket 8 superior.

A construction method for the above-mentioned supporting system, comprising the following steps in sequence:

The first step is to pour the bridge pier 10. When pouring the bridge pier, reserve the reserved holes for the tie rods, install the anti-overturning pier 3, and pour concrete inside the anti-overturning pier;

The second step is to install the steel truss 9 between the anti-overturning piers on the top of the anti-overturning buttress, weld the inter-section steel truss between the anti-overturning buttresses and the anti-overturning buttress, and weld the triangular bracket 8 of the transverse bridge of the anti-overturning buttress;

The third step is to penetrate the high-strength finish-rolled threaded steel bar 7 in the hole of the tie rod in the bridge pier 10, and connect the section steel components 6 on both sides of the bridge pier to the bridge pier with high-strength finished-rolled threaded steel bar, and weld the finished steel bar on the ground. The triangular bracket of the Shun bridge is placed on the steel beam between the piers, and the roots of the horizontal bar 1 of the triangular bracket of the Shun bridge and the oblique bar 2 of the triangular bracket of the Shun bridge are connected with the steel components installed on the pier, and the cross bridge of the pier Install the pier cross bridge to the triangular bracket 5 on both sides;

The fourth step is to lay the bridge-direction section steel 11 on the upper surface of the anti-overturning support pier transverse bridge to the triangular support 8 and the bridge pier transverse bridge to the triangular support 5, and the top surface of the bridge-direction section steel 11 is flush with the top surface of the bridge-direction triangular bracket. Then on the top surface of the section steel along the bridge and the top surface of the triangular bracket along the bridge, the cross-bridge section steel 4 is arranged according to the interval, and the steel pipe support with adjustable jacking is installed on the section steel of the cross-bridge, and the square timber and the bottom form are laid on the top, so that Form the cantilever pouring construction 0# block concrete support system.

Although the preferred embodiments of this patent have been described above in conjunction with the accompanying drawings, this patent is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those skilled in the art Under the inspiration of this patent, personnel can also make many forms without departing from the scope of protection of the purpose and claims of this patent, and these all belong to the protection scope of this patent.

Claims (3)

1. a kind of cantilever pouring construction 0# block concrete support system, comprises the triangular bracket of the Shun bridge, and the triangular bracket of the Shun bridge comprises the horizontal bar of the triangular bracket of the Shun bridge and the oblique bar of the triangular bracket of the Shun bridge, The triangular bracket of the Shun bridge The frame is installed on the pier, and the horizontal bar of the triangular bracket of the Shun bridge is equipped with cross-bridge section steel, which is characterized in that: it also includes: Anti-overturning buttresses, the anti-overturning buttresses are arranged on both sides of the bridge pier along the bridge direction, and at least two anti-overturning buttresses are arranged on each side of the bridge pier along the bridge direction; The steel truss between the anti-overturning piers, the steel truss between the anti-overturning piers is fixedly installed between the anti-overturning buttresses on the side of the bridge pier along the direction of the bridge; anti-overturning buttress transverse bridge to the triangular bracket, said anti-overturning buttress transverse bridge towards the triangular bracket is mounted on the anti-overturning buttress, and the anti-overturning buttress along each side of the pier is away from the other anti-overturning buttress on that side The direction of cross-bridge distribution; The horizontal bar of the triangular bracket along the bridge rests on the steel truss between the anti-overturning piers or on the steel truss between the anti-overturning piers and the cross-bridge triangular support of the anti-overturning piers. 2. The support system according to claim 1, characterized in that: the oblique rod of the triangular bracket of the Shun bridge and the horizontal bar of the triangular bracket of the Shun bridge are installed on the section steel assembly near the pier, located on both sides of the pier and connected along the line. Each pair of section steel components in the bridge direction is tensioned and fixed on the pier by high-strength finish-rolled rebar, and the high-strength finish-rolled rebar passes through the reserved holes on the pier. 3. A construction method of the support system according to claim 1 or 2, characterized in that: comprising the following steps successively: S1. Pouring bridge piers, reserve reserved holes when pouring bridge piers, install anti-overturning buttresses, and pour concrete inside the anti-overturning buttresses; S2. Install the steel truss between the anti-overturning piers on the top of the anti-overturning buttress, weld the inter-section steel truss between the anti-overturning buttresses and the anti-overturning buttress, and weld the triangular support of the transverse bridge of the anti-overturning buttress; S3. Insert high-strength fine-rolled threaded steel bars into the reserved holes of the bridge pier, and connect the section steel components on both sides of the bridge pier to the bridge pier with high-strength fine-rolled threaded steel bars, and place the triangular bracket welded on the ground on the bridge. On the steel crossbeam between the piers, connect the roots of the horizontal bar of the triangular bracket of the Shun bridge and the inclined bar of the triangular bracket of the Shun bridge with the steel components installed on the pier, and install the triangular direction of the triangular bridge of the pier on both sides of the pier. bracket; S4. On the upper surface of the anti-overturning support pier transverse bridge to the triangular support and the bridge pier transverse bridge to the triangular support, lay the along-bridge section steel, the top surface of the along-bridge section steel and the top surface of the along-bridge triangular bracket are flush, and then lay the along-bridge section steel On the top surface and the top surface of the triangular bracket along the bridge direction, the cross-bridge section steel is arranged according to the spacing, and the steel pipe bracket with adjustable jacking is installed on the cross-bridge section steel, and the square timber and the bottom form are laid on top, so as to form the 0# block of cantilever pouring construction Concrete support system.