Construction structure for thin overlay of cement pavement of expressway tunnel

Abstract

The utility model discloses a construction structure of a thin overlay of a cement pavement of an expressway tunnel, which aims to solve the technical problem of improving the drainage performance of the thin overlay of the expressway tunnel in a special environment. Comprising a cement concrete pavement base; the adhesive layer oil layer is coated on the cement concrete pavement base layer; the thin overlay layer is paved on the tack coat oil layer; an inverted trapezoidal water guide groove is formed in the cement concrete pavement base layer, the whole surface of the inverted trapezoidal water guide groove is coated and protected by the adhesive layer oil layer, the bottom of the thin overlay layer sinks into the adhesive layer oil layer to adapt to a groove formed by the inverted trapezoidal water guide groove and is bonded with two side walls of the groove, and the adhesive layer oil layer is bonded with the bottom of the thin overlay layer. A water guide channel is reserved between the bottom of the thin overlay layer and the bottom of the groove and extends to a roadside drainage ditch. The drainage efficiency is improved, and the service life of the pavement is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a highway tunnel cement pavement thin layer covering construction structure. BACKGROUND

[0002] The highway cement pavement thin layer covering is a modified asphalt mixture thin layer structure paved on the original cement concrete pavement, and the thickness is usually 2-3 centimeters. This structure design is mainly used for improving the functional performance of the highway cement pavement, including improving the anti-skid performance, reducing the noise, improving the driving comfort, etc. The typical structure is in turn from top to bottom: the modified asphalt mixture thin layer covering, the modified emulsified asphalt tack coat oil layer and the cement concrete base layer. This structure form not only retains the high strength characteristics of the cement concrete pavement, but also overcomes the shortcomings of the insufficient anti-skid performance, and is one of the important technical measures for the current pavement maintenance and reconstruction.

[0003] The highway tunnel environment is special, and the humidity inside is large all the year round (the relative humidity can reach more than 85%), and the day and night temperature difference is obvious (the temperature change can reach 10-15 DEG C). Under this environment, the tunnel pavement is in the "wet-dry-wet" cycle state for a long time, which often leads to the difficulty in timely drainage of the water on the road surface. The accumulated water not only accelerates the deterioration of the pavement material, but also seeps into the interlayer, causes the interlayer adhesion strength to decrease, and causes the thin layer covering material to peel off, the pit groove, the rut and other diseases. Especially in winter, the freeze-thaw cycle of the accumulated water will further aggravate the damage. These problems not only affect the driving safety and comfort, but also greatly shorten the service life of the pavement and increase the maintenance cost. Therefore, how to ensure the durability of the thin layer covering under the special environment of the highway tunnel and improve the drainage efficiency becomes a difficult problem to be solved in engineering construction. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a highway tunnel cement pavement thin layer covering construction structure to solve the technical problem of improving the drainage performance of the thin layer covering under the special environment of the highway tunnel.

[0005] Therefore, a highway tunnel cement pavement thin layer covering construction structure is provided, which comprises: a cement concrete pavement base layer; a tack coat oil layer coated on the cement concrete pavement base layer; a thin layer covering layer paved on the tack coat oil layer; a reverse trapezoidal water guide groove is formed on the cement concrete pavement base layer, the surface of the reverse trapezoidal water guide groove is coated and protected by the tack coat oil layer, the bottom of the thin layer covering layer is sunk into the groove formed by the reverse trapezoidal water guide groove in the tack coat oil layer and is bonded with the two side walls of the groove, and a water guide channel is reserved between the bottom of the thin layer covering layer and the bottom of the groove, and the water guide channel extends to the roadside drainage ditch.

[0006] As the improvement and / or instantiation of the above-mentioned highway tunnel cement pavement thin layer covering construction structure, the inverted trapezoidal water guide groove has a top width of 3cm-8cm, a bottom width of 2cm-5cm and a depth of 3cm-5cm.

[0007] As the improvement and / or instantiation of the above-mentioned highway tunnel cement pavement thin layer covering construction structure, a gravel cushion layer is laid in the water guide channel, and the gravel particle size of the gravel cushion layer is 5mm-10mm.

[0008] As the improvement and / or instantiation of the above-mentioned highway tunnel cement pavement thin layer covering construction structure, the thin layer covering layer is composed of modified asphalt mixture, and has a thickness of 1.5cm-3cm.

[0009] As the improvement and / or instantiation of the above-mentioned highway tunnel cement pavement thin layer covering construction structure, further, the tack coat oil layer is composed of modified emulsified asphalt, and has a thickness of 0.5mm-30mm.

[0010] As the improvement and / or instantiation of the above-mentioned highway tunnel cement pavement thin layer covering construction structure, further, the length direction of the inverted trapezoidal water guide groove has an included angle of 15°-30° with the driving direction.

[0011] The above-mentioned highway tunnel cement pavement thin layer covering construction structure effectively solves the problem of water accumulation in the tunnel by forming a special drainage channel through the inverted trapezoidal water guide groove and the communication with the roadside drainage ditch; the groove body design of the inverted trapezoidal water guide groove enhances the structural stability (stress concentration at the groove body is not easy to occur), and the overall coating protection of the tack coat oil layer not only ensures the waterproof performance of the water guide groove, but also strengthens the bonding effect of the thin layer covering layer and the groove side wall; at the same time, the reserved water guide channel ensures the long-term drainage function and avoids the damage of the pavement caused by water accumulation. The above-mentioned structure design not only improves the drainage efficiency and prolongs the service life of the pavement, but also has simple structure, is convenient for construction and post-maintenance, and well adapts to the requirements of the special environment of the tunnel.

[0012] The utility model will be further described below in combination with the drawings and specific embodiments. The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be known by practice. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings which form a part of this specification are included to aid in the understanding of the present utility model and, together with the description, serve to explain the present utility model, but are not to be considered as placing limitations on the present utility model.

[0014] Figure 1It is a sectional view of the highway tunnel cement pavement thin layer covering construction structure of the embodiment of the application.

[0015] Figure 2 It is Figure 1 a top view. DETAILED DESCRIPTION

[0016] The present application will be described in greater detail by making reference to the drawings. The present application can be realized by those skilled in the art based on the description. Before the present application is disclosed with reference to the drawings, it is to be noted that:

[0017] The technical solutions and technical features provided in each part including the following description can be combined with each other without conflict. In addition, in the case of possibility, these technical solutions, technical features and related combinations can be given a specific technical subject and protected by a related patent.

[0018] The embodiments of the present application involved in the following description are usually only part of the embodiments but not all the embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of patent protection.

[0019] Regarding the terms and units in this specification: the term "comprising" and any variations thereof in the specification and corresponding claims and related parts are intended to cover non-exclusive inclusion. In addition, other related terms and units can be reasonably interpreted based on the related content provided in the specification.

[0020] Figure 1 It is a sectional view of the highway tunnel cement pavement thin layer covering construction structure of the embodiment of the application. Figure 2 It is Figure 1 a top view. As shown in Figure 1 , the highway tunnel cement pavement thin layer covering construction structure comprises: a cement concrete pavement base layer 1; an adhesive layer oil layer 2 coated on the cement concrete pavement base layer 1; a thin layer covering layer 3 paved on the adhesive layer oil layer 2; a reverse trapezoidal water guide groove 11 is formed on the cement concrete pavement base layer 1, the surface of the reverse trapezoidal water guide groove 11 is coated and protected by the adhesive layer oil layer 2, the bottom of the thin layer covering layer 3 is sunk into a groove 21 formed by the reverse trapezoidal water guide groove 11 and adhered to the two side walls of the groove 21, and a water guide channel is reserved between the bottom of the thin layer covering layer 3 and the bottom of the groove 21, the water guide channel extends to a roadside drainage ditch.

[0021] The inverted-trapezoid water guide groove 11 is connected with the road side drainage ditch to form a special drainage channel, effectively solving the problem of water accumulation in the tunnel; the groove body design of the inverted-trapezoid water guide groove 11 enhances the structural stability (not easy to cause stress concentration at the groove body), and the overall coating protection of the tack coat oil layer 2 not only ensures the waterproof performance of the water guide groove, but also strengthens the bonding effect of the thin layer cover layer 3 and the side wall of the groove 21; at the same time, the reserved water guide channel ensures the long-term drainage function, avoiding the damage of the pavement caused by water accumulation. The above structure design not only improves the drainage efficiency and prolongs the service life of the pavement, but also has simple structure, facilitating construction and post-maintenance, and well adapts to the requirements of the special environment of the tunnel.

[0022] Generally, the top width of the inverted-trapezoid water guide groove 11 is 3cm-8cm, the bottom width is 2cm-5cm, and the depth is 3cm-5cm; the thin layer cover layer is composed of modified asphalt mixture, and the thickness is 1.5cm-3cm; the tack coat oil layer is composed of modified emulsified asphalt, and the thickness is 0.5mm-30mm.

[0023] In addition, the gravel cushion 4 is laid in the water guide channel to prevent the thin layer cover layer 3 from being depressed. The gravel particle size of the gravel cushion 4 is 5mm-10mm. In this way, a stable support structure can be formed by the gravel cushion 4 to prevent the thin layer cover layer 3 from being deformed and sunken under the action of vehicle load, and the water guide channel can also have sufficient void ratio to ensure smooth drainage. The gravel particle size of 5mm-10mm will not excessively affect the structural stability, nor will it be too small to cause blockage, and a good balance between support performance and drainage function can be achieved.

[0024] In addition, the length direction of the inverted-trapezoid water guide groove 11 is at an angle of 15°-30° with the driving direction in the embodiment, which can reduce the impact force of the vehicle tire on the inverted-trapezoid water guide groove 11, can also prolong the effective drainage length of the water guide channel, increase the drainage area, improve the drainage efficiency, and at the same time, can also reduce the flow velocity, reduce the scouring of the tack coat oil layer 2, and prolong the service life.

[0025] The related content of the utility model has been described above. The ordinary skilled in the art will be able to realize the utility model based on these descriptions. Based on the above content of the present description, all other embodiments obtained by the ordinary skilled in the art without creative labor shall belong to the scope of patent protection.

Claims

1. A highway tunnel cement pavement thin layer overlay construction structure, comprising: a cement concrete pavement base; a tack coat oil layer coated on the cement concrete pavement base; a thin layer overlay layer paved on the tack coat oil layer; characterized in that: an inverted trapezoidal water guide groove is formed on the cement concrete pavement base, the surface of the inverted trapezoidal water guide groove is entirely coated and protected by the tack coat oil layer, the bottom of the thin layer overlay layer is sunk into a groove formed by the inverted trapezoidal water guide groove in the tack coat oil layer to adapt to the inverted trapezoidal water guide groove and is bonded with the two side walls of the groove, and a water guide channel is reserved between the bottom of the thin layer overlay layer and the bottom of the groove, the water guide channel extends to a roadside drainage ditch.

2. The highway tunnel cement pavement thin layer overlay construction structure according to claim 1, characterized in that: The inverted trapezoidal water guide groove has a top width of 3-8 cm, a bottom width of 2-5 cm, and a depth of 3-5 cm.

3. The highway tunnel cement pavement thin layer overlay construction structure according to claim 2, characterized in that: A gravel cushion layer is paved in the water guide channel, and the gravel particle size of the gravel cushion layer is 5-10 mm.

4. The highway tunnel cement pavement thin-layer overlay construction structure according to any one of claims 1-3, characterized in that: The thin layer overlay layer is composed of modified asphalt mixture, and has a thickness of 1.5-3 cm.

5. The highway tunnel cement pavement thin-layer overcoat construction structure according to any one of claims 1-3, characterized in that: The tack coat oil layer is composed of modified emulsified asphalt, and has a thickness of 0.5-30 mm.

6. The highway tunnel cement pavement thin layer overlay construction structure according to any one of claims 1-3, characterized in that: The length direction of the inverted trapezoidal water guide groove and the driving direction form an included angle of 15-30°.

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