阅读说明：本技术 一种变截面超高性能混凝土引板构造及其施工方法 (Variable-section ultrahigh-performance concrete guide plate structure and construction method thereof ) 是由 薛俊青 唐玉风 布鲁诺.布里斯杰拉 黄福云 于 2020-06-29 设计创作，主要内容包括：本发明提供一种变截面超高性能混凝土引板构造及其施工方法,包括桥台及位于桥台后侧与桥台湿接缝连接的引板,引板前侧搭于桥台后侧且引板的下方具有支撑引板的板下填土层,引板的上方覆盖有板上填土层,引板中部具有截面缩小的变截面区段,使引板形成中部截面小两端截面大的哑铃状,本发明将工厂预制的超高性能混凝土引板与桥台浇筑取消施工缝,而且通过在引板中部设置哑铃型的变截面区域能形成塑性铰,使引板具有一定的转动能力。超高性能混凝土的高抗拉和抗压强度特性保证引板具有足够的纵向刚度传递纵向位移及优异的抗渗透性并允许引板变截面区域出现微小裂缝,不影响引板的耐久性。由于转动发生在路面以下,所以路面发生裂缝的风险大大降低。(The invention provides a variable cross-section ultra-high performance concrete leading plate structure and a construction method thereof, wherein the variable cross-section ultra-high performance concrete leading plate structure comprises an abutment and a leading plate which is positioned at the rear side of the abutment and connected with a wet seam of the abutment, the front side of the leading plate is lapped at the rear side of the abutment, a plate lower filling layer for supporting the leading plate is arranged below the leading plate, a plate upper filling layer is covered above the leading plate, and a variable cross-section with a reduced cross section is arranged in the middle of the leading plate, so that the leading plate is in a dumbbell shape with a small middle cross section and large cross sections at two ends. The high tensile strength and compressive strength characteristics of the ultra-high performance concrete ensure that the guide plate has enough longitudinal rigidity to transmit longitudinal displacement and excellent impermeability, and allow the variable cross-section area of the guide plate to have tiny cracks without affecting the durability of the guide plate. Since the rotation takes place below the road surface, the risk of cracks in the road surface is greatly reduced.)

1. The utility model provides a variable cross section ultrahigh performance concrete draws board structure which characterized in that, includes the abutment and is located the abutment rear side and the wet seam joint's of abutment draw board, draw board front side take on the abutment rear side and draw the board below of board have support draw board under fill layer, draw the board top cover and have on fill layer, draw the board middle part and have the variable cross section district section that the cross section reduces, make the draw board form the dumbbell shape that the both ends cross section is big that the middle part cross section is little.

2. The lead plate structure of claim 1, wherein the lead plate extends obliquely downward from one side of the abutment to the other side.

3. The structure of claim 1, wherein the front side of the guide plate and the upper part of the front side of the abutment are flush, and the upper surfaces of the guide plate, the abutment and the upper filling layer of the guide plate are paved with a road surface.

4. The lead plate structure of claim 1, wherein the variable cross-section of the lead plate transitions to two end slopes.

5. The variable cross-section ultra-high performance concrete leader board construction according to claim 1, wherein the leader board is prefabricated for ultra-high performance concrete.

6. A construction method for a variable-section ultrahigh-performance concrete guide plate structure is characterized by comprising the following steps of:

(1) prefabricating an ultra-high performance concrete guide plate, chiseling the surface of an abutment, and compacting the underfloor filling soil beside the abutment for supporting the guide plate to a shape which is matched with the appearance structure of the guide plate to form an underfloor filling layer;

(2) hoisting the guide plate, and adopting a wet joint to integrate the guide plate and the abutment;

(3) laying soil above the guide plate to form an upper soil filling layer;

(4) and paving the road surface on the upper surfaces of the guide plate, the abutment and the upper filling layer of the guide plate.

Technical Field

The invention relates to a novel structure of a variable-section ultrahigh-performance concrete guide plate and a construction method thereof.

Background

The telescopic device is arranged behind the existing bridge abutment, and problems of bumping at the bridge head, corrosion of a substructure, high maintenance cost and the like can be caused by damage of the telescopic device. In addition, the existing seamless bridge approach plate not only needs to bear the load of a vertical vehicle, but also needs to absorb and transfer the longitudinal deformation of a main beam under the temperature action of the seamless bridge. A large number of engineering practices show that the guide plate is easy to rotate due to the post-construction settlement of the guide plate and the longitudinal displacement of the guide plate, cracks are generated at the connecting construction joint part of the seamless bridge and the guide plate, and the cracks are further reflected to the road surface to form road surface cracks, so that the normal use performance of the seamless bridge is influenced.

Disclosure of Invention

The invention improves the problems, namely the invention aims to solve the technical problems that the telescopic device is arranged behind the existing bridge abutment, and the problems of bumping at the bridge head, corrosion of a substructure, high maintenance cost and the like are caused by damage of the telescopic device.

The specific embodiment of the invention is as follows: the utility model provides a variable cross section ultra high performance concrete draws board structure, includes abutment and is located the wet seam joint's of abutment rear side and abutment and draws the board, draw the board front side and take up and have the board lower soil filling layer that supports the board of drawing the board in abutment rear side and the below of drawing the board, the top of drawing the board covers there is the board upper soil filling layer, draw the board middle part and have the variable cross section district section that the cross section reduces, make to draw the board and form the dumbbell shape that the middle part cross section is little both ends cross section is big.

Further, the guide plate extends downwards from one side of the abutment to the other side of the abutment.

Furthermore, the front side of the guide plate and the upper part of the front side of the abutment are flush, and a road surface is laid on the upper surfaces of the guide plate, the abutment and the upper soil filling layer of the guide plate.

Further, the guide plate variable cross-section is transited to slope surfaces at two ends.

Furthermore, the guide plate is prefabricated by ultra-high performance concrete.

The invention also comprises a construction method of the variable-section ultrahigh-performance concrete guide plate structure, which comprises the following steps of:

(1) prefabricating an ultra-high performance concrete guide plate, chiseling the surface of an abutment, and compacting the underfloor filling soil beside the abutment for supporting the guide plate to a shape which is matched with the appearance structure of the guide plate to form an underfloor filling layer;

(2) hoisting the guide plate, and adopting a wet joint to integrate the guide plate and the abutment;

(3) laying soil above the guide plate to form an upper soil filling layer;

(4) and paving the road surface on the upper surfaces of the guide plate, the abutment and the upper filling layer of the guide plate.

Compared with the prior art, the invention has the following beneficial effects: the invention prefabricates the variable-section ultra-high performance concrete guide plate in a factory, transports the concrete guide plate to the site and hoists the concrete guide plate in place. The front end of the guide plate and the abutment form a whole through a wet joint, the guide plate is restrained from rotating, and the construction joint is avoided. The section of the middle part of the guide plate is reduced to form a dumbbell-shaped variable section area. When the guide plate needs to rotate, the variable cross-section area can form a plastic hinge, so that the guide plate has certain rotation capacity. The high tensile strength and compressive strength of the ultra-high performance concrete ensure that the guide plate has enough longitudinal rigidity to transmit longitudinal displacement, and the excellent anti-permeability of the ultra-high performance concrete allows micro cracks to appear in the variable cross section area of the guide plate, so that the durability of the guide plate is not influenced. Since the rotation takes place at a certain depth below the road surface, the risk of cracks in the road surface is greatly reduced.

Drawings

FIG. 1 is a first schematic diagram of a cross-sectional structure step of a new structure of a variable cross-section ultra-high performance concrete guide plate;

FIG. 2 is a schematic diagram of a new structural step of a cross section of a new structure of a variable cross-section ultra-high performance concrete leader;

FIG. 3 is a schematic diagram of a third step of a cross-sectional structure of a new structure of a variable-section ultra-high performance concrete leader;

fig. 4 is a schematic sectional structure diagram of a new structure of the variable-section ultra-high performance concrete leader.

In the figure, 1-guide plate, 2-variable cross section area, 3-bridge abutment, 4-under-plate filling layer, 5-wet joint, 6-on-plate filling layer and 7-road surface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4, the variable cross-section ultra-high performance concrete leading plate structure comprises an abutment and a leading plate 1 which is positioned at the rear side of the abutment 3 and connected with a wet joint 5 of the abutment, wherein the front side of the leading plate is overlapped at the rear side of the abutment, an under-plate soil filling layer 4 for supporting the leading plate is arranged below the leading plate, an on-plate soil filling layer 6 covers the upper part of the leading plate, a variable cross-section 2 with a reduced cross section is arranged in the middle of the leading plate, so that the leading plate is in a dumbbell-shaped structure with a small cross section in the middle and large cross sections at two ends, and the variable cross-section of the leading plate.

In this embodiment, the guide plate is prefabricated by ultra-high performance concrete, and the guide plate extends obliquely downward from one side of the abutment to the other side.

The front side of the guide plate and the upper part of the front side of the abutment are flush, and a road surface is laid on the upper surfaces of the guide plate, the abutment and the upper filling layer of the guide plate.

Thereby the super high performance concrete that the mill was prefabricated draws board and abutment to pour and cancel the construction joint, thereby make the board of drawing form dumbbell type structure through the variable cross section area that sets up in the middle part of drawing the board moreover, this variable cross section area probably forms the plasticity hinge, makes the board of drawing have certain turnability. The high tensile strength and compressive strength of the ultra-high performance concrete ensure that the guide plate has enough longitudinal rigidity to transmit longitudinal displacement, and the excellent anti-permeability of the ultra-high performance concrete allows micro cracks to appear in the variable cross section area of the guide plate, so that the durability of the guide plate is not influenced. Because the guide plate extends obliquely downwards from one side of the abutment to the other side and rotates to a certain depth below the road surface, the risk of cracks on the road surface is greatly reduced.

The invention also comprises a construction method of the variable-section ultrahigh-performance concrete guide plate structure, which comprises the following steps of:

(1) prefabricating an ultra-high performance concrete guide plate, chiseling the surface of an abutment 3, compacting the underfloor filling soil beside the abutment for supporting the guide plate to a shape which is matched with the appearance structure of the guide plate to form an underfloor filling layer, wherein the construction schematic diagram is shown in figure 1;

(2) hoisting the guide plate, and adopting a wet joint to integrate the guide plate and the abutment, wherein the construction schematic diagram is shown in figure 2;

(3) laying soil above the guide plate to form a soil filling layer on the guide plate, wherein the construction schematic diagram is shown in figure 3;

(4) and paving a road surface on the upper surfaces of the guide plates, the abutment and the upper filling layer of the guide plates, wherein the construction schematic diagram is shown in figure 4.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected connection can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.