CN205636397U - Assembled cement road surface structure - Google Patents

Abstract

The utility model relates to an assembled cement pavement structure, which comprises an end assembly plate and a middle assembly plate; an arc-shaped arch is arranged in the middle of the middle assembly plate, and a positive step interface and an inverted step interface are respectively arranged at the outer end; the end assembly plate includes The starting point end assembly plate and the end point end assembly plate, on one end of the end assembly plate, an anti-sideshift pier and a displacement limit pile connection hole are set, and the other end is provided with a positive step interface or an inverted step interface; Seam-resistant steel plates are provided on the upper surface of the intersection of the assembly plates, and a rigid connector is provided in the vertical middle; rear grouting pipes, road drainage grooves, and road anti-skid strips are respectively installed on the lower and upper surfaces of the assembly plates. The utility model has the advantages of simple structure and good mechanical performance, not only can realize the rapid assembly of the cement pavement, but also can effectively prevent and control various diseases of the cement pavement.

Description

A prefabricated cement pavement structure

technical field

The utility model relates to an assembled cement pavement structure, which belongs to the field of road engineering and is suitable for cement pavement structure design and construction engineering, especially for cement pavement construction or reconstruction projects with tight construction period and high environmental requirements.

Background technique

As the main structural form of roads, cement pavement still occupies a considerable proportion in my country's low-grade roads. Considering that the cast-in-place cement pavement has the advantages of good integrity and high rigidity, the current cement pavement mostly adopts the cast-in-place cement pavement. However, the cast-in-place cement pavement is prone to plate cracking, mud pumping, and voiding at the bottom of the slab during use. and other diseases seriously affect the driving comfort of the road; in addition, the cast-in-place cement pavement also has shortcomings such as long construction period, serious environmental pollution, difficult mechanized construction, and high maintenance costs.

There is a new type of prefabricated vehicle-mounted road surface, which is assembled and paved by prefabricated reinforced concrete plate components. The interior of the lower road panel is evenly distributed with a double-layer two-way steel skeleton, and the lower part has a pre-embedded suspension ring; a rubber film is laid between the upper road panel and the lower road panel, and the upper part of the upper road panel has a wear-resistant steel fiber concrete layer. Although the structure takes into account the assembly of the pavement structure, vehicle vibration, and surface anti-skid problems, it is difficult to ensure the integrity of the double-layer slab construction, the vibration load cannot be effectively dissipated, and engineering defects are prone to occur at the joints of adjacent slabs.

A reusable steel fiber reinforced concrete prefabricated slab, which includes equilateral angle steels arranged at the four corners of the prefabricated slab. Tension bars are arranged in the gaps between the tendons, and the cross nodes between the tendons are fixed by binding iron wires, and the bottom of the tendons is provided with a protective layer pad. Although this structure can increase the connection strength between the plates and improve the performance of the precast concrete slab, it is difficult to solve the problems of temperature stress damage of the concrete slab and vehicle vibration damage, and the structure is prone to local stress concentration.

To sum up, the prefabricated cement pavement has a wide range of engineering application prospects. Although some explorations have been carried out on the prefabricated cement pavement structure in the project, and corresponding prefabricated structures have been proposed. These structures have achieved relatively good results under suitable working conditions. The engineering effect is good, but there are still some deficiencies in the coordination of the force between the boards, the prevention and control of road surface diseases, and the improvement of road performance.

In view of this, in order to improve the stress conditions between prefabricated panels, improve the pavement performance of the prefabricated cement pavement, reduce cement pavement diseases, and reduce pavement maintenance costs, it is urgent to invent a fast construction speed, good pavement performance, and low operation and maintenance costs. Low prefabricated concrete pavement structure.

Contents of the invention

The purpose of the utility model is to provide a prefabricated cement pavement structure which can not only be constructed quickly, but also can effectively prevent and control cement pavement diseases, and can also improve the road performance of the pavement.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:

A prefabricated cement pavement structure, characterized in that: the structure includes an end assembly plate and a middle assembly plate; an arc-shaped arch is arranged in the middle of the middle assembly plate, and a positive step interface and an inverted step interface are respectively provided at the outer end; the end assembly plate includes The end assembly plate at the starting point and the end assembly plate at the end point are provided with anti-sideshift buttresses and displacement limit pile connection holes at one end of the end assembly plate, and a positive step interface or an inverted step interface is provided at the other end; Set the seam-resistant steel plate on the upper surface of the intersection of the assembly plate, and set the rigid connector in the vertical middle; set the groove on the bottom of the assembly plate after the grouting pipe is laid on the lower surface of the assembly plate, and set the road anti-skid strip on the upper surface.

The middle assembly plate is made of reinforced concrete, the thickness in the middle of the plate is smaller than the thickness around the plate, the lower surface of the middle part of the plate is arched, and the upper surface is flat.

The positive step interface and the inverted step interface of the adjacent assembly plates are connected correspondingly, and the rear injection hose insertion groove is set at the transverse joint of the positive step interface, the rigid connector insertion groove is set in the middle of the vertical joint, and the upper surface is set. Seam resistance steel plate connection groove, joint surface with upper contact steel sheet, upper contact rubber, vertical rear injection pipe through hole at the interface of the inverted step, rigid connector in the middle of the vertical joint, and resistance joint on the upper surface The steel plate lays the groove and connects the rigid body insertion hole, and the joint surface is provided with the lower part contacting the rubber and the lower part contacting the steel sheet.

The middle of the seam-blocking steel plate is a strip-shaped crack-blocking plate, and the two ends are fan-shaped crack-blocking plates; the seam-blocking steel plate is made of stainless steel, one side is set along the longitudinal direction with steel nails passing through the hole, and the other side is set to connect with the assembly plate The connection rigid body; the connection rigid body is welded and connected with the seam-resistant steel plate, and an oblique support rib is set at the connection; the connection rigid body extends into the lower end of the assembly plate to set a pull-out joint.

The anti-sideshift pier is in the shape of a triangle or an inverted trapezoid, the internal steel mesh of the anti-sideshift pier is welded or bound to the steel mesh of the end assembly plate, and vertical displacement lateral limit piles are arranged in the anti-sideshift pier to connect After the installation of the assembly plate is completed, the displacement lateral limiting piles are drilled downward through the connecting holes of the displacement lateral limiting piles.

The rigid connecting body includes barbed steel bars, connecting steel plates, and steel bar joints; wherein the connecting steel plates are made of stainless steel plates, and the two sides of the connecting steel plates are painted with anti-rust paint; The other end of the intersecting barbed steel bar is provided with a plurality of steel bar joints; the rigid connector is welded and connected to the steel bar cage in the assembly plate through the steel bar joints.

The upper contact steel sheet, the lower contact steel sheet, the upper contact rubber layer, and the lower contact rubber layer preset the steel nail through hole and the rear injection tube through hole, and the upper contact rubber layer and the lower contact rubber layer are connected with the upper contact steel respectively. The sheet and the lower surface of the lower contact steel sheet are pasted and connected.

There is a steel pipe or a plastic pipe for the back injection hose, and the upper part is provided with a sealing rubber plug, and the lower part is inserted into the groove through the hole of the back injection hose; the side wall of the back injection hose is provided with a colloid seepage hole.

The rear grouting pipe at the bottom of the slab is laid with a groove parallel to the road centerline, with a rectangular or trapezoidal cross-section, connected to the rear grouting connection hole.

The utility model has the following characteristics:

(1) Set a step-shaped interface at the interface of the assembly plate, and set the contact steel sheet and contact rubber, which can not only effectively control the differential deformation of the contact part, but also prevent contact damage at the edge of the plate, and can also reduce the vibration load of the vehicle on the assembly impact damage of the board.

(2) A horizontal connecting steel plate and a seam-resistant steel plate are installed at the contact of adjacent assembly plates, which can simultaneously control the vertical differential deformation between the plates, limit the lateral relative movement between the plates, disperse the vehicle load, and prevent the plates from being damaged (contact damage, corner coupling, etc.) damage, etc.).

(3) The bottom surface of the intermediate assembly plate is designed to be arc-shaped, which can simultaneously save material consumption, prevent local stress concentration, reduce the difficulty of construction quality control, and improve the mechanical performance of the assembly plate.

(4) The pavement water removal and disease dynamic control issues are considered in the design of the assembly plate, which can effectively improve the ability of cement pavement disease prevention and control, and improve the performance of the pavement.

Description of drawings

Fig. 1 is a cross-sectional schematic diagram of the utility model assembled cement pavement structure;

Fig. 2 is a schematic cross-sectional view of the middle assembly plate in Fig. 1;

Fig. 3 is a schematic cross-sectional view of the assembly plate at the end of the starting point of the road section in Fig. 1;

Fig. 4 is a cross-sectional schematic view of the assembly plate at the terminal end of Fig. 1;

Fig. 5 is a schematic plan view of the seam-resistant steel plate in Fig. 1;

Fig. 6 is a schematic cross-sectional view of the seam-resistant steel plate in Fig. 1;

Fig. 7 is a schematic plan view of the rigid connector in Fig. 1 .

In the figure: 1-end assembly plate; 2-middle assembly plate; 3-positive step interface; 4-inverted step interface; Pile; 8-joint-resistant steel plate; 9-contact rubber at the bottom of the slab; 10-rigid connector; 11-laying groove for rear grouting pipe; 12-pavement anti-slip strip; 13-rear grouting pipe; ;15-base layer; 16-subgrade; 17-shoulder; 18-starting end assembly plate; 19-end end assembly plate; 20-back injection hose; 21-back injection hose insertion groove; Groove; 23-connection groove of seam-resistant steel plate; 24-upper contact steel sheet; 25-upper contact rubber; 26-back injection hose through hole; 27-seam resistance steel plate laying groove; 28-connection rigid body insertion hole; - bottom contact rubber; 30 - lower contact steel sheet; 31 - strip crack blocking plate; 32 - sector crack blocking plate; 33 - steel nail passing through the hole; 34 - connecting rigid body; 35 - oblique support rib; 36-pull-out joint; 37-steel nail; 38-barbed steel bar; 39-connecting steel plate; 40-steel bar joint.

detailed description

The embodiments of the present utility model are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present utility model. All similar structures and similar changes of the utility model should be included in the protection of the utility model. scope.

Cement concrete slab design and pouring construction technical requirements, road base design and construction technical requirements, road subgrade design and construction technical requirements, steel bar binding construction technical requirements, road shoulder design and construction technical requirements, etc., will not be repeated in this implementation mode, and will focus on The utility model relates to the embodiment of the structure.

Fig. 1 is a schematic cross-sectional view of the assembled cement pavement structure of the present invention, Fig. 2 is a schematic cross-sectional view of the middle assembly plate in Fig. 1, Fig. 3 is a schematic cross-sectional view of the assembly plate at the beginning and end of the road section in Fig. 1, and Fig. 4 is a schematic cross-sectional view of the end point of the road section in Fig. 1 Figure 5 is a schematic plan view of the seam-resistant steel plate in Figure 1, Figure 6 is a schematic cross-sectional view of the seam-resistant steel plate in Figure 1, and Figure 7 is a schematic plan view of the rigid connector in Figure 1. Referring to Figures 1 to 7, the road to be reinforced is a two-way, two-lane, third-class road, and the reinforcement structure mainly includes an end assembly plate 1 and a middle assembly plate 2; the outer ends of the middle assembly plate 2 are respectively provided with positive step interfaces 3 and an inverted step interface 4; the end assembly plate 1 includes a starting point end assembly plate 18 and an end point end assembly plate 19, and an anti-sideshift support pier 5 and a displacement limit pile are arranged at one end of the end assembly plate 1 The connecting hole 6 is provided with a positive step interface 3 or an inverted step interface 4 at the end of the other side; a seam-resistant steel plate 8 is provided on the upper surface of the intersection of the assembly plate, and a rigid connector 10 is provided in the vertical middle; the lower surface of the assembly plate and the The upper surface is respectively provided with a grouting pipe laying groove 11 and a road surface anti-skid strip 12; the road surface anti-skid strip 12 adopts a rigid anti-skid strip.

The middle assembly plate 2 is made of reinforced concrete, the concrete strength is C40, the horizontal width is 4m, and the vertical length is 6m; HRB335 secondary steel bars with a diameter of 10mm, the spacing between the steel bars is 100mm; the board corners and board edges are arranged according to the structure; the thickness of the middle of the board is 30cm, the thickness of the board edge is 40cm, and the arc radius of the lower surface is 7.0m.

The positive step interface 3 and the inverted step interface 4 are arranged on the outer edge of the end assembly plate 1 or the middle assembly plate 2 .

The height of the upper step of the positive step interface 3 is 14cm, the height of the lower step is 24cm, and the extension width of the lower step is 24cm; at the transverse joint of the positive step interface 3, a row of post-injection hoses is inserted into the groove 21 at a vertical interval of 50cm along the precast panel. Set rigid connector insertion groove 22 in the middle of the seam, seam-resistant steel plate connection groove 23 on the upper surface, upper contact steel sheet 24, and upper contact rubber 25 on the seam surface; rear injection hose insertion groove 21 deep 4cm, diameter 5cm; the rigid connecting body is inserted into the groove 22 with a depth of 15cm and a height of 3cm; the connection groove 23 of the seam-resistant steel plate is 3cm in height and 10cm in width; Lay on the surface of the interface, prefabricated in a stepped shape, and paste an upper contact rubber 25 with a thickness of 5 mm on the upper surface of the upper contact steel sheet 24 .

The upper step of the inverted step interface 4 is 14cm high, the lower step is 24cm high, and the upper step protruding section is 24cm wide; in the protruding section of the upper step, there is a longitudinal interval of 50cm along the prefabricated slab, and a row of vertical rear injection pipes with a diameter of 5cm are set to pass through Holes 26, a rigid connector 10 is provided in the middle of the vertical joint, a seam-resistant steel plate laying groove 27 and a connecting rigid body insertion hole 28 are arranged on the upper surface; the rigid connector 10 includes barbed steel bars 38, connecting steel plates 39, and steel bar joints 40; Steel bars 38 and steel bar joints 40 use secondary steel bars with diameters of 10 mm and 16 mm respectively; connecting steel plates 39 use HR550LA galvanized stainless steel plates with a thickness of 10 mm, and paint antirust paint on both sides of connecting steel plates 39; barbed steel bars 38 and connecting steel plates 39 welding connection, the welding angle is 15 degrees; one end of the steel bar joint 40 is welded and connected with the connecting steel plate 39, and the other end is welded and connected with the steel cage in the assembly plate; the lower contact steel sheet 30 is cut from HR550LA galvanized stainless steel strip, The thickness of the plate is 5mm, and the whole section is laid on the surface of the interface, which is prefabricated in a stepped shape; the lower contact rubber 29 with a thickness of 5mm is pasted on the lower surface of the lower contact steel sheet 30; .

The seam-resistance steel plate 8 adopts HR550LA galvanized stainless steel plate with a thickness of 15mm, and the two sides of the seam-resistance steel plate 8 are painted with anti-rust paint; A 1/4 circle with a diameter of 10cm + a square with a width of 10cm is combined; the seam-resistant steel plate 8 is made of stainless steel plate, and the steel nails are set through the holes 33 at a longitudinal interval of 20cm along one side, and the connecting rigid body 34 connected with the assembly plate is set on the other side , the connecting rigid body 34 adopts HR550LA galvanized stainless steel plate with a thickness of 10mm and a height of 100mm, and welds the pullout joint 36 on both sides of the connecting rigid body 34; the pullout joint 36 adopts a secondary steel bar with a diameter of 10mm; For welded connection, set oblique support ribs 35 evenly spaced along the longitudinal direction at the connection; the oblique support ribs 35 use secondary steel bars with a diameter of 20mm; The glue makes the pullout joint 36 and the assembly plate bonded into a whole; the other side of the seam resistance steel plate 8 is connected with the assembly plate by using stainless steel nails 37;

The anti-sideshift pier 5 is triangular in shape, and the internal steel mesh is welded and connected with the inner reinforcement mesh of the end assembly plate 1. A displacement lateral limiting pile connection hole 6 with a diameter of 200mm is set in the anti-sideshift pier 5. After the assembly plate is installed, pass through Displacement lateral limiting pile connecting hole 6 is driven downward to set displacement lateral limiting pile 7 . The displacement limit pile 7 is a reinforced concrete bored pile with a diameter of 200 mm.

The rear injection hose 20 adopts a steel pipe with a diameter of 4 cm, and is inserted into the groove 21 through the hole 26 at the bottom of the rear injection hose 20; the rear injection hose 20 is set at the upper contact rubber 25 and the lower contact rubber 29 Colloid leaks out of the hole.

The rear grouting pipe laying groove 11 is arranged at the lower part of the assembly plate, which is rectangular, 20 cm wide and 10 cm high, and the rear grouting pipe 13 is laid in the groove; the rear grouting pipe 13 adopts a steel pipe with a diameter of 5 cm, and the material strength grade is Q235. The wall thickness is 5mm, and the side wall is perforated.

The base layer 15 adopts cement-stabilized crushed stone semi-rigid base layer, and the gradation composition of its materials is shown in Table 1

Table 1 Gradation composition of cement-stabilized gravel materials

The subgrade 16 is filled with sandy soil, and a road shoulder 17 with a width of 1.5 m is set outside the subgrade 16 .

Claims (9)

1. A prefabricated cement pavement structure, characterized in that: it includes an end assembly plate (1) and a middle assembly plate (2); the middle portion of the middle assembly plate (2) is provided with an arc-shaped arch, and the outer ends are respectively provided with positive step interfaces (3) and the inverted step interface (4); the end assembly plate (1) comprises the starting point end assembly plate (18) and the end point end assembly plate (19), at the end of one side of the end assembly plate (1) Set the anti-sway pier (5) and the connecting hole (6) of the displacement limit pile, and set the positive step interface (3) or the inverted step interface (4) at the other end; set the resistance on the upper surface of the intersection of the assembly plate. Seam steel plate (8), rigid connector (10) is established in the vertical middle part; Grouting pipe laying groove (11) after the bottom of the plate is set on the lower surface of the assembly plate, and road surface anti-skid strip (12) is set on the upper surface. 2. A prefabricated cement pavement structure according to claim 1, characterized in that: the intermediate assembly plate (2) is made of reinforced concrete, the thickness in the middle of the plate is smaller than the thickness around the plate, and the lower surface of the middle part of the plate is circular arched , the upper surface is flat. 3. A prefabricated cement pavement structure according to claim 1, characterized in that: the positive step interface (3) and the inverted step interface (4) of the adjacent assembly plates are connected correspondingly, and the positive step interface (3) The horizontal seam of the rear injection pipe is provided with an insertion groove (21), the middle of the vertical seam is provided with a rigid connector insertion groove (22), and the upper surface of the positive step interface (3) is provided with a seam-resistance steel plate connection groove (23). , the upper contact steel sheet (24) and the upper contact rubber (25) are arranged on the surface of the joint; the vertical post-injection hose passes through the hole (26) at the inverted step interface (4), and a rigid connector is provided in the middle of the vertical joint (10), the upper surface of the inverted step interface (4) is provided with seam-resistant steel plate laying grooves (27) and connecting rigid body insertion holes (28), and the lower contact rubber (29) and lower contact steel sheet (30) are established on the joint surface. 4. A kind of prefabricated cement pavement structure according to claim 1, is characterized in that: the middle of described seam-resistance steel plate (8) is strip-shaped crack blocking plate (31), and two ends are fan-shaped crack blocking plate ( 32); the seam-resistance steel plate (8) is made of stainless steel, one side is longitudinally provided with steel nails passing through the hole (33), and the other side is provided with a connecting rigid body (34) connected to the assembly plate; the connecting rigid body (34) and the seam-resistance The steel plates (8) are welded and connected, and oblique support ribs (35) are arranged at the joints; the lower end of the connecting rigid body (34) extending into the assembly plate is provided with an anti-pull joint (36). 5. A prefabricated cement pavement structure according to claim 1, characterized in that: the anti-sideshift pier (5) is in a triangular or inverted trapezoidal shape, and the internal steel mesh and the end of the anti-sideshift pier (5) are The steel mesh of the assembly plate is welded or bound, and the vertical displacement limit pile connection hole (6) is set in the anti-sway pier (5). After the installation of the assembly plate is completed, the displacement limit pile connection hole (6) Set displacement limit pile (7) down. 6. A prefabricated cement pavement structure according to claim 1, characterized in that: the rigid connector (10) comprises barbed steel bars (38), connecting steel plates (39), and steel bar joints (40); Steel plate (39) adopts stainless steel plate, brushes antirust paint on the both sides of connecting steel plate (39); At one end of connecting steel plate (39), the barbed steel bar ( 38), the other end is provided with a plurality of steel bar joints (40); the rigid connecting body (10) is welded and connected with the steel bar cage in the assembly plate through the steel bar joints (40). 7. An assembled cement pavement structure according to claim 1, characterized in that: the upper contact steel sheet (24), the lower contact steel sheet (30), the upper contact rubber (25) and the lower contact rubber (29) The upper part is preset with the steel nail passing through the hole (33) and the rear injection tube through the hole (26), the upper contact rubber (25) and the lower contact rubber (29) are respectively connected with the upper contact steel sheet (24) and the lower contact steel sheet The lower surface of (30) is pasted and connected. 8. A kind of assembled cement pavement structure according to claim 3, is characterized in that: be provided with post-injection rubber pipe (20), described back-injection rubber pipe (20) adopts steel pipe or plastic pipe, and its top is provided with sealing rubber plug, The bottom is inserted in the groove (21) through the hole (26) through the back injection hose; the side wall of the back injection hose (20) is provided with a colloid oozing hole. 9. A prefabricated cement pavement structure according to claim 1, characterized in that: the grouting pipe laying groove (11) at the bottom of the slab is parallel to the direction of the center line of the road, the cross section is rectangular or trapezoidal, and the rear Grout connection hole connection.