UHPC small box girder structure

Abstract

The utility model relates to the technical field of small box girders, in particular to a UHPC small box girder structure which comprises a first small box girder, the first small box girder comprises a top plate, web plates and a bottom plate, and the web plates are fixedly connected to the positions, close to the edges of the two sides, of the lower surface of the top plate. Third reinforcing steel bars of the first small box girder and the second small box girder are staggered in a groove which is formed by the connecting half grooves and has a semicircular section, and meanwhile, the partition plate is matched with the baffle to be clamped at the connecting position of the first small box girder and the second small box girder, and slurry is blocked by the baffle to enter the partition plate during filling; the connecting position of the first small box girder and the second small box girder is reinforced through the partition plate, so that the connecting position of the first small box girder and the second small box girder is more reliable, and the construction difficulty is not increased when the partition plate and the connecting semi-groove are filled together; the end plate is matched with the web positions of the two first small box girders to form a mold, slurry is added from the grouting holes, and pouring can be completed in the end plate.

Description

Technical Field

[0001] The utility model relates to the technical field of small box beams, in particular to a UHPC small box beam structure. Background Art

[0002] Concrete small box girder bridges are widely used in small and medium span bridges. Due to the constraints of previous design experience, vehicle overload, and the emptying of small box girder supports, the lateral stiffness of small box girder bridges is insufficient, which reduces the overall force performance of the bridge and affects the structural safety. The lateral connection reinforcement of small box girders can be achieved by adding steel between beams, pouring concrete lateral connections between beams, etc. Therefore, the following solutions have emerged:

[0003] For example, publication number: CN208440963U discloses a UHPC small box beam structure, including a plurality of box beam bodies connected by longitudinal joints, the box beam bodies are prefabricated by ultra-high performance concrete, and the above structure can improve the strength of the small box beam, but the above structure requires a rotating threaded assembly to adjust the position of the template before pouring;

[0004] Publication No.: CN214573415U, which describes a UHPC diaphragm device for prefabricating a small concrete box girder, comprising a UHPC diaphragm assembled on the inner side of the small box girder; flange plates are arranged on both sides of the UHPC diaphragm. The above device increases the strength of the small box girder, but during construction, it is necessary to fix the diaphragm by anchor rods or other fixings during grouting, and it is not convenient to carry out the grouting at the connection position simultaneously, which increases the difficulty of construction. Utility Model Content

[0005] The utility model aims to provide a UHPC small box beam structure in order to solve the problem that a threaded component needs to be used to pre-fix the template before grouting when a part of the existing structure is used.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A UHPC small box girder structure comprises a No. 1 small box girder, wherein the No. 1 small box girder comprises a top plate, a web plate, and a bottom plate, wherein the lower surface of the top plate is fixedly connected with the web plate near the edges on both sides, the inner surface of the web plate is fixedly connected with the bottom plate, a limit strip is fixedly connected inside the No. 1 small box girder, an end plate is placed on the outer surface of the limit strip inside the No. 1 small box girder, and a partition plate is snap-connected to the outer surface of the No. 1 small box girder.

[0008] Furthermore, the upper surface of the No. 1 small box beam is provided with connecting half grooves near the two side edges, and the upper surface of the No. 1 small box beam is provided with grouting holes.

[0009] Furthermore, a No. 3 steel bar is pre-embedded in the top plate, and one end of the No. 3 steel bar extends into the interior of the connecting half groove, and a No. 2 steel bar perpendicular to the No. 3 steel bar is pre-embedded in the top plate.

[0010] Furthermore, No. 1 steel bars are pre-embedded inside the web and the bottom plate.

[0011] Furthermore, the inner surface of the end plate is fixedly connected with a No. 4 steel bar, and the outer surface of the No. 4 steel bar is nested and fixedly connected with a steel bar hoop.

[0012] Furthermore, the partition has a U-shaped cross section, a No. 5 steel bar is fixedly connected to the inner surface of the partition, and a baffle is fixedly connected to the upper surface of the partition.

[0013] Furthermore, a snap-in groove is provided between the partition plate and the baffle plate, and the partition plate is snap-connected with the connecting half groove via the snap-in groove.

[0014] Beneficial effects of the utility model:

[0015] By setting the connecting half-trough, end plate and partition, the No. 3 steel bar in the No. 2 small box beam is staggered with the No. 1 small box beam, the No. 2 steel bar and the No. 3 steel bar increase the strength of the top plate, and the No. 3 steel bars of the No. 1 small box beam and the No. 2 small box beam are staggered in the semicircular groove composed of the connecting half-trough. When the cast-in-place UHPC material is filled, the strength of the filling position can be strengthened. At the same time, the partition cooperates with the baffle to clamp the connection position of the No. 1 small box beam and the No. 2 small box beam. When filling, the slurry is blocked by the baffle to enter the interior of the partition, and the No. 5 steel bar strengthens the connection position. In order to improve the strength of the structure, the connection position of the No. 1 small box girder and the No. 2 small box girder is reinforced by the partition, which makes the connection position of the No. 1 small box girder and the No. 2 small box girder more reliable, and filling it together with the connecting half groove will not increase the difficulty of construction. The front and rear surfaces of the No. 1 small box girder are extended in length, and another group of No. 1 small box girders can be connected through the end plate. The end plate is used to form a mold with the web position of the two No. 1 small box girders. The slurry is added from the grouting hole to complete the casting inside the end plate. The No. 4 steel bar and steel bar hoop strengthen the strength of the connection position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the end plate structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the planar structure of the connecting half slot of the utility model;

[0020] Figure 4 It is a schematic diagram of the partition structure of the utility model.

[0021] In the figure: 1. Small box girder No. 1; 101. Top plate; 102. Web plate; 103. Bottom plate; 104. Connecting half groove; 105. Grouting hole; 106. Steel bar No. 1; 107. Steel bar No. 2; 108. Steel bar No. 3; 109. Limiting strip; 2. Small box girder No. 2; 3. End plate; 301. Steel bar No. 4; 302. Steel bar hoop; 4. Partition plate; 401. Baffle plate; 402. Steel bar No. 5; 403. Connecting groove. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 As shown, a UHPC small box girder structure includes a No. 1 small box girder 1, the No. 1 small box girder 1 includes a top plate 101, a web plate 102, and a bottom plate 103, the lower surface of the top plate 101 is fixedly connected with the web plate 102 near the edge positions on both sides, the inner surface of the web plate 102 is fixedly connected with the bottom plate 103, the interior of the No. 1 small box girder 1 is fixedly connected with a limit strip 109, the outer surface of the limit strip 109 is located inside the No. 1 small box girder 1 and an end plate 3 is placed, the outer surface of the No. 1 small box girder 1 is snap-connected with a partition plate 4, the upper surface of the No. 1 small box girder 1 is provided with a connecting half groove 104 near the edge positions on both sides, the upper surface of the No. 1 small box girder 1 is provided with a grouting hole 105, the interior of the top plate 101 is pre-embedded with No. 3 steel bars 108, and the No. 3 steel bars 108 are One end of the reinforcement 108 extends into the interior of the connecting half groove 104, the interior of the top plate 101 is pre-embedded with a No. 2 reinforcement 107 perpendicular to the No. 3 reinforcement 108, the interior of the web 102 and the bottom plate 103 are pre-embedded with a No. 1 reinforcement 106, the inner surface of the end plate 3 is fixedly connected with the No. 4 reinforcement 301, the outer surface of the No. 4 reinforcement 301 is nested and fixedly connected with a reinforcement hoop 302, and the length is extended on the front and rear surfaces of the No. 1 small box beam 1, and another group of No. 1 small box beams 1 can be connected through the end plate 3. The end plate 3 is combined with the web 102 position of the two No. 1 small box beams 1 to form a mold, and the slurry is added from the grouting hole 105 to complete the casting inside the end plate 3. The No. 4 reinforcement 301 and the reinforcement hoop 302 strengthen the strength of the connection position.

[0024] The cross section of the partition 4 is U-shaped, and a No. 5 steel bar 402 is fixedly connected to the inner surface of the partition 4, and a baffle 401 is fixedly connected to the upper surface of the partition 4. A clamping groove 403 is provided between the partition 4 and the baffle 401, and the partition 4 is clamped and connected with the connecting half groove 104 through the clamping groove 403. The No. 1 small box beam 1 and the No. 2 small box beam 2 have the same structure, and the No. 3 steel bar 108 in the No. 2 small box beam 2 is staggered with the No. 1 small box beam 1, and the No. 2 steel bar 107 and the No. 3 steel bar 108 increase the strength of the top plate 101, and the No. 3 steel bars 108 of the No. 1 small box beam 1 and the No. 2 small box beam 2 are staggered at the connecting In the semicircular trough formed by the half trough 104, the strength of the filling position can be enhanced when the cast-in-place UHPC material is filled. At the same time, the partition 4 cooperates with the baffle 401 to be stuck at the connection position of the No. 1 small box girder 1 and the No. 2 small box girder 2. During filling, the slurry is blocked by the baffle 401 from entering the interior of the partition 4, and the No. 5 steel bar 402 strengthens the strength of the connection position. The connection position of the No. 1 small box girder 1 and the No. 2 small box girder 2 is reinforced by the partition 4, so that the connection position of the No. 1 small box girder 1 and the No. 2 small box girder 2 is more reliable, and filling together with the connecting half trough 104 will not increase the difficulty of construction.

[0025] Working principle: The structure of the No. 1 small box girder 1 and the No. 2 small box girder 2 is the same, and the No. 3 steel bar 108 in the No. 2 small box girder 2 is staggered with the No. 1 small box girder 1, and the No. 2 steel bar 107 and the No. 3 steel bar 108 increase the strength of the top plate 101, and the No. 3 steel bars 108 of the No. 1 small box girder 1 and the No. 2 small box girder 2 are staggered in the semicircular groove formed by the connecting half groove 104. When the cast-in-place UHPC material is filled, the strength of the filling position can be enhanced. At the same time, the partition 4 cooperates with the baffle 401 to be stuck at the connection position of the No. 1 small box girder 1 and the No. 2 small box girder 2. When filling, the slurry is blocked by the baffle 401 to enter the interior of the partition 4, and the No. 5 steel bar 402 strengthens the strength of the connection position, and the connection position of the No. 1 small box girder 1 and the No. 2 small box girder 2 is reinforced by the partition 4, so that the connection position of the No. 1 small box girder 1 and the No. 2 small box girder 2 is more reliable, and filling it together with the connecting half groove 104 will not increase the difficulty of construction. The length of the front surface and the rear surface of the No. 1 small box girder 1 is extended, and another group of No. 1 small box girders 1 can be connected through the end plate 3. The end plate 3 is used to cooperate with the web 102 position of the two No. 1 small box girders 1 to form a mold, and the slurry is added from the grouting hole 105 to complete the casting inside the end plate 3. The No. 4 steel bar 301 and the steel bar hoop 302 strengthen the strength of the connection position.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The above contents are merely examples and explanations of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A UHPC small box girder structure, comprising a first small box girder (1), characterized in that: The first small box girder (1) comprises a top plate (101), a web plate (102), and a bottom plate (103); the lower surface of the top plate (101) is fixedly connected to the web plate (102) near the edges on both sides; the inner surface of the web plate (102) is fixedly connected to the bottom plate (103); a limit strip (109) is fixedly connected inside the first small box girder (1); an end plate (3) is placed on the outer surface of the limit strip (109) inside the first small box girder (1); and a partition plate (4) is snap-fitted and connected to the outer surface of the first small box girder (1).

2. A UHPC small box beam structure according to claim 1, characterized in that: The upper surface of the first small box girder (1) is provided with connecting half grooves (104) near both side edges, and the upper surface of the first small box girder (1) is provided with grouting holes (105).

3. A UHPC small box beam structure according to claim 2, characterized in that: A No. 3 steel bar (108) is pre-buried inside the top plate (101), and one end of the No. 3 steel bar (108) extends into the interior of the connecting half groove (104). A No. 2 steel bar (107) perpendicular to the No. 3 steel bar (108) is pre-buried inside the top plate (101).

4. A UHPC small box beam structure according to claim 1, characterized in that: A No. 1 steel bar (106) is pre-embedded inside the web (102) and the bottom plate (103).

5. The UHPC small box beam structure according to claim 1, characterized in that: The inner surface of the end plate (3) is fixedly connected with a No. 4 steel bar (301), and the outer surface of the No. 4 steel bar (301) is nested and fixedly connected with a steel bar hoop (302).

6. The UHPC small box beam structure according to claim 1, characterized in that: The partition (4) has a U-shaped cross section, a No. 5 steel bar (402) is fixedly connected to the inner surface of the partition (4), and a baffle (401) is fixedly connected to the upper surface of the partition (4).

7. A UHPC small box beam structure according to claim 6, characterized in that: A snap-fit ​​groove (403) is provided between the partition plate (4) and the baffle plate (401), and the partition plate (4) is snap-fitted and connected to the connecting half groove (104) via the snap-fit ​​groove (403).

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