Fabricated ultra-high performance concrete UHPC pavement structure

Abstract

The utility model discloses an assembly type ultra-high performance concrete UHPC pavement structure, the pavement structure is composed of UHPC pavement slabs, support beams and buttresses, the periphery of each UHPC pavement slab is provided with plug-in parts, the support beams are provided with slots, the plug-in parts are smoothly inserted into the slots, the buttresses are square blocks, the front, back, left and right of each buttress are provided with notches for placing the support beams, and the plug-in parts are inserted into the slots. An embedded part is arranged at the bottom of the buttress and is inserted into a hole site of a roadbed; the load of the road surface is effectively transmitted to the roadbed in a stacking and overlapping manner; wherein the UHPC pavement slabs, the supporting beams and the buttresses are all produced by using UHPC materials in a factory according to a unified standard and process, and through precise size design, the fabricated UHPC pavement is formed by continuous lap joint similar to a building block lap joint method. Compared with a cast-in-place pavement, the production mode can greatly improve the production efficiency, reduce the production cost and reduce the noise and pollution of a construction site.

Description

Technical Field

[0001] The utility model belongs to the technical field of road construction, and specifically relates to an assembled ultra-high performance concrete (UHPC) pavement structure. Background Art

[0002] Traditional pavement construction has problems such as long construction period, strong dependence on construction environment, easy cracking, weak shear resistance, etc. With the advancement of materials science, UHPC, as a concrete material with ultra-high strength, high toughness, high durability and low porosity, has gradually been used in road construction. However, the existing UHPC pavement construction method is mostly on-site pouring, which has low construction efficiency and is difficult to control quality.

[0003] Patent authorization announcement No. CN 113005843 B discloses a recyclable ultra-high performance concrete assembled temporary pavement structure. By setting up an assembly mechanism, when a temporary road needs to be paved, the assembly mechanism is opened and paved on the ground where the road is needed by opening the cross plate one and the cross plate two, and then the concrete plate is inserted on the insertion rod, and then the concrete plate can be fixed, so that rapid paving can be achieved to ensure the construction progress. However, such a structure is too complicated and the installation process is complicated, which violates the principle of construction efficiency. Summary of the invention

[0004] The utility model aims to design an assembled ultra-high performance concrete (UHPC) pavement structure, aiming to improve the durability, crack resistance, shear resistance and construction efficiency of the pavement.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An assembled ultra-high performance concrete (UHPC) pavement structure, the pavement structure consists of a UHPC road panel, a support beam and a pier. The UHPC road panel is provided with a plug-in part around it, the support beam is provided with a slot, the plug-in part is smoothly inserted into the slot, the pier is a square block, and slots for placing the support beam are provided on the front, back, left and right sides of the pier. An embedded part is provided at the bottom of the pier, and the embedded part is inserted into a hole in the roadbed.

[0007] Furthermore, the UHPC road panel is in a square shape, and the plug-in part is vertically or non-vertically fixed on the lower surface of the UHPC road panel.

[0008] Furthermore, the shape of the slot of the support beam corresponds to the plug-in portion, and the slot is opened in a vertical or non-vertical manner.

[0009] Furthermore, the support beam is a square block, and the shape of the notch corresponding to the pier is the same as the shape of the support beam.

[0010] Furthermore, the embedded part is in the shape of a square block or a cylinder, and the corresponding hole positions are opened as square block holes or cylindrical holes.

[0011] Furthermore, the entire pavement is formed by assembling a plurality of pavement structures.

[0012] The following beneficial effects can be obtained through the above technical solution:

[0013] 1. UHPC, as a concrete material with ultra-high strength, high toughness, high durability and low porosity, is used in road construction to enhance the durability, crack resistance and shear resistance of the road surface.

[0014] 2. The load of the road surface is effectively transferred to the roadbed through overlapping layers. The UHPC road panels, support beams and piers are all produced in the factory using UHPC materials according to unified standards and processes. Through precise size design, the assembled UHPC road surface is formed by continuous overlapping similar to the "building blocks" method. Compared with cast-in-place pavement, this production method can greatly improve production efficiency, reduce production costs, and reduce noise and pollution at the construction site.

[0015] 3. After the prefabricated components are transported to the construction site, they are assembled by hoisting, splicing, etc. to form a complete road. This method can greatly shorten the construction period and improve construction efficiency. At the same time, it also helps to improve the overall quality and safety of the road and facilitate the recycling of materials during dismantling, which is in line with the concept of green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a side decomposition diagram of the UHPC pavement structure.

[0017] Figure 2 This is a diagram of the pier structure.

[0018] Figure 3 This is a schematic diagram of the slot side of the support beam.

[0019] Figure 4 This is the lower surface structure diagram of the UHPC road slab.

[0020] Figure 5 This is the side view after assembly.

[0021] In the figure:

[0022] In the figure: 1. UHPC road panel; 2. support beam; 3. pier; 5. hole position; 6. roadbed; 11. plug-in part; 21. slot; 31. notch. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings:

[0024] An assembled ultra-high performance concrete (UHPC) pavement structure is composed of a UHPC road panel 1, a support beam 2 and a pier 3. The UHPC road panel 1 is provided with a plug-in portion 11 on all sides, the support beam 2 is provided with a slot 21, and the plug-in portion 11 is smoothly inserted into the slot. The pier 3 is a square block, and notches 31 for placing the support beam are provided on the front, back, left and right sides of the pier. An embedded portion 32 is provided at the bottom of the pier, and the embedded portion 32 is inserted into a hole 5 of a roadbed 6.

[0025] The UHPC road panel 1 is in a square shape, and the plug-in portion 11 is vertically or non-vertically fixed on the lower surface of the UHPC road panel 1 .

[0026] The shape of the slot 21 of the support beam 2 corresponds to the plug-in portion 11 , and the slot 21 is opened in a vertical or non-vertical manner.

[0027] The support beam 2 is a square block, and the shape of the notch 31 corresponding to the pier is the same as that of the support beam 2.

[0028] The embedded part 32 is in the shape of a square block or a cylinder, and the corresponding hole position 5 is formed as a square block hole or a cylindrical hole.

[0029] The entire pavement is formed by assembling several pavement structures.

[0030] This embodiment provides a prefabricated UHPC pavement structure. Figure 1-5 , including a UHPC road panel 1, a support beam 2 and a pier 3 stacked from top to bottom, a plug-in part 11 is provided at the front, rear, left and right ends of the lower surface of the UHPC road panel, and the plug-in part is a rectangular protruding plug-in perpendicular to the UHPC road panel, a slot 21 is provided on the support beam 2, and the shape of the slot 21 is also a rectangular slot eye, the pier 3 is a square block, and a notch 31 is provided on the front, rear, left and right sides of the pier, and the notch can be smoothly embedded in the support beam 2, and an embedded part 32 is provided at the bottom of the pier, and the embedded part 32 is inserted into the hole 5 of the roadbed 6.

[0031] The pier is inserted into the hole 5 of the roadbed 6 through the bottom embedded part 32, and then the support beam 2 is inserted into the groove 31 of the pier, with the slot 21 of the support beam 2 facing upward, and then the UHPC road panel 1 is inserted into the slot 21 through the plug-in part 11. It should be noted that the pier needs to be pre-positioned and set according to the length and width of the UHPC road panel 1.

[0032] The UHPC road slab 1, support beam 2 and pier 3 are produced in the factory using UHPC materials according to unified standards and processes. Through precise size design, they are continuously overlapped like "building blocks" to form an assembled UHPC road surface. Compared with cast-in-place pavement, this production method can greatly improve production efficiency, reduce production costs, and reduce noise and pollution at the construction site.

[0033] The number of overlapped prefabricated UHPC modules is determined by the required width and length of the road. The load of the road surface is effectively transferred to the roadbed by overlapping. After the prefabricated components are transported to the construction site, they are assembled by hoisting, splicing, etc. to form a complete road. This method can greatly shorten the construction period and improve construction efficiency. At the same time, it also helps to improve the overall quality and safety of the road and facilitate the recycling of materials during demolition, which is in line with the concept of green environmental protection.

[0034] The construction method is:

[0035] S1: UHPC unit prefabrication

[0036] The UHPC road slab 1, support beam 2 and pier 3 designed with precise dimensions are produced in a factory using UHPC materials according to unified standards and processes;

[0037] S2: Roadbed construction

[0038] The roadbed is built in layers with a compaction thickness of 15-20cm. The molds are placed according to the proportion requirements to leave a protruding part of the roadbed that can be inserted into the pre-buried holes of the roadbed, thereby fixing each pier;

[0039] S3: Positioning and installation

[0040] Clean the debris on the compacted roadbed surface to ensure that the surface of the pre-embedded holes of the roadbed is flat, insert each pier into the pre-embedded holes of the roadbed, then insert each support beam into the notch 31 reserved around the pier, and then insert the UHPC road panel into the slot 21 of the support beam 2 through the plug-in part 11 around it, thereby fixing the UHPC road panel. Thus, it is stacked from bottom to top, and the load of the road surface is effectively transferred to the roadbed by stacking. The number of overlapped prefabricated UHPC modules is determined by the required width and length of the road until a complete road is paved.

[0041] The above are all preferred implementations of the present invention. For ordinary technicians in this technical field, without departing from the principle of the present invention, various equivalent modifications to the present invention belong to the protection scope of the claims attached to this application.

Claims

1. An assembled ultra-high performance concrete (UHPC) pavement structure, characterized by: The pavement structure is composed of a UHPC road panel (1), a support beam (2) and a pier (3); the UHPC road panel (1) is provided with an insert portion (11) on its periphery; the support beam (2) is provided with a slot (21), into which the insert portion (11) is smoothly inserted; the pier (3) is in the form of a square block; notches (31) for placing the support beam are provided at the front, rear, left and right sides of the pier; an embedded portion (32) is provided at the bottom of the pier; the embedded portion (32) is inserted into a hole (5) of the roadbed (6).

2. The assembled ultra-high performance concrete (UHPC) pavement structure according to claim 1, characterized in that: The UHPC road panel (1) is in a square shape, and the plug-in portion (11) is fixed vertically or non-vertically on the lower surface of the UHPC road panel (1).

3. The assembled ultra-high performance concrete (UHPC) pavement structure according to claim 1 or 2, characterized in that: The shape of the slot (21) of the support beam (2) corresponds to the plug-in portion (11), and the slot (21) is opened in a vertical or non-vertical manner.

4. The assembled ultra-high performance concrete (UHPC) pavement structure according to claim 1, characterized in that: The support beam (2) is in the form of a square block, and the shape of the notch (31) corresponding to the buttress is the same as that of the support beam (2).

5. The assembled ultra-high performance concrete (UHPC) pavement structure according to claim 1, characterized in that: The embedded portion (32) is in the shape of a square block or a cylinder, and the corresponding hole position (5) is formed as a square block hole or a cylindrical hole.

6. The assembled ultra-high performance concrete (UHPC) pavement structure according to claim 1, characterized in that: The entire pavement is formed by assembling several pavement structures.

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