CN204940039U - Plant stone Bridge Surface Paving by Cement structure for one kind - Google Patents

Abstract

A stone planting cement concrete bridge deck pavement structure, a stone layer is arranged on the upper surface of the cement concrete structure layer, a waterproof adhesive layer is arranged on the upper surface of the stone layer, and an asphalt pavement layer is arranged on the upper surface of the waterproof adhesive layer. In the stone layer, stones with a single particle size distribution within the particle size of 4.75-26.5mm are selected and scattered at a stone density of ^5-20Kg /m2. The thickness of the stone layer is set at 2.75-13mm. The utility model applies the planting stone technology to the cement concrete bridge deck pavement system, and paves a planting stone material layer between the cement concrete layer and the asphalt layer. The pavement structure of planted stone concrete bridge utilizes the rich texture structure formed by planted stone on the surface of the cement concrete bridge deck to effectively improve the interlayer bonding performance and interlayer shear resistance of the cement concrete bridge deck pavement structure, and has strong durability , high applicability, material saving, safety and environmental protection.

Description

A stone cement concrete bridge deck pavement structure

technical field

The utility model belongs to the technical field of highway engineering, and in particular relates to a stone planting cement concrete bridge deck pavement structure.

Background technique

In the bridge deck pavement system composed of cement concrete bridge deck and asphalt mixture pavement layer, the interlayer structure is the weakest part, and the quality of interlayer bonding is the key factor affecting the service life of the bridge deck pavement system. For the cement concrete bridge deck pavement structure, the cement concrete deck should be well bonded to the asphalt pavement layer. The bonding condition directly determines the bonding performance of the entire pavement structure.

At present, there are three main surface treatment methods for cement concrete bridge decks: spraying waterproof adhesive layer, fabric reinforcing ribs and surface roughening. Spraying a waterproof bonding layer on the surface of the cement concrete bridge deck can enhance the bonding force between the asphalt pavement and the cement concrete deck; implanting anchor bars on the surface of the cement concrete bridge deck can also improve the relationship between the asphalt pavement and the cement concrete bridge The combination between the panels prevents detachment and slippage between pavement layers.

For the rough surface treatment of cement concrete bridge decks, sandblasting, shot blasting, acid etching and exposed stone treatment are relatively recognized technologies abroad. These treatment technologies in developed countries are highly adaptable to the local pavement system, but for the current situation that the traffic characteristics in different regions of my country vary greatly and the pavement is relatively weak, these technologies have poor applicability.

The surface roughening of cement concrete bridge decks in my country still uses traditional techniques, such as chiseling and roughening. These methods are mostly manual construction, and the input-output ratio is poor, which cannot meet the needs of the current development of bridge construction in our country. At present, many pavement projects adopt the milling method of milling machine, but after the milling machine construction, the milling off includes mortar and some aggregates, and if some loose aggregates are not processed in time, the bridge deck and pavement Adhesion between layers will be a hidden danger. In addition, the milling process is mostly longitudinal, and the transverse friction effect is poor.

The exposed stone process will not damage the overall structure of the bridge deck, and at the same time form a rich surface texture, which can effectively solve the problems existing in the traditional rough treatment process. From the beginning of 2000 to the present, Chang'an University has carried out comprehensive and systematic research on the theoretical analysis, construction technology, related materials and manual and mechanized construction technology of exposed stone cement concrete pavement, combined with scientific research projects in many provinces, cities and regions across the country, paving exposed stone concrete pavement. Stone cement concrete pavement entity project, its road performance has been verified. However, during the construction process of exposed stone technology, it is necessary to use exposed stone agent, and after the pavement is completed, hydraulic flushing is required, which increases the construction cost, and the flushing causes waste of mud and pollution to the environment.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the defects of conventional cement concrete bridge deck surface treatment methods, and provide a planted stone cement concrete bridge deck pavement structure with low engineering cost, strong durability, convenient construction, safety and environmental protection.

The technical scheme adopted to solve the above-mentioned technical problems is:

A stone layer is arranged on the upper surface of the cement concrete structure layer, a waterproof adhesive layer is arranged on the upper surface of the stone layer, and an asphalt pavement layer is arranged on the upper surface of the waterproof adhesive layer.

In the stone layer of the utility model, stones with a single particle size distribution within the stone particle size of 4.75-26.5mm are selected and scattered with a stone density of 5-20Kg/m ² .

The thickness of the stone material layer of the utility model is set at 2.75-13mm.

The utility model applies the planting stone technology to the cement concrete bridge deck pavement system, and paves a planting stone material layer between the cement concrete layer and the asphalt layer. The pavement structure of planted stone concrete bridge utilizes the rich texture structure formed by planted stone on the surface of the cement concrete bridge deck to effectively improve the interlayer bonding performance and interlayer shear resistance of the cement concrete bridge deck pavement structure, and has strong durability , High applicability, material saving, safety and environmental protection.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

detailed description

The utility model is now further described in conjunction with the accompanying drawings and examples, but the utility model is not limited to the following embodiments.

Example 1

In Fig. 1, the cement concrete bridge deck pavement structure of the utility model is composed of a cement concrete structure layer 1, a stone material layer 2, a waterproof bonding layer 3, and an asphalt pavement layer 4 from bottom to top.

In accordance with the "Technical Rules for Construction of Highway Cement Concrete Pavement" (JTG/TF30-2011) on the mixing, transportation and construction of cement concrete mixture, the pouring, paving, vibrating, leveling and curing processes are completed in sequence to complete the cement concrete For the paving of the structure layer 1, the stone layer 2 is laid on the upper surface of the cement concrete structure layer 1 without initial setting, and the stone material with a particle size of 13.2-16mm is evenly spread at a spreading density of ¹⁴ ±1Kg/m2, and the stone is vibrated by the roller shaft. The equipment vibrates and forms the stone layer, and at the same time alternately uses the leveling plate to level the upper surface of the stone layer 2 to ensure the flatness of the upper surface of the stone layer 2, avoid local overpressure or underpressure, and measure the stone with a steel ruler When the thickness of the stone layer 2 reaches the range of 9.8-13mm, stop the vibration molding, and complete the laying of the stone layer 2. After the laying of the stone layer 2, the stone layer 2 is left standing for 3 days and then sprinkled on the stone layer 2. The cloth vehicle evenly sprays the waterproof bonding material 2 to 3 times and stands still for 24 hours to form a waterproof bonding layer 3, and after standing for 24 hours, pave the asphalt pavement layer 4 on the upper surface of the waterproof bonding layer 3.

Example 2

Lay the stone layer 2 on the upper surface of the cement concrete structure layer 1 that has not been initially set, evenly spread the stones with a particle size of 4.75-9.5mm at a spreading density of ⁶ ±1Kg/m2, and vibrate the stone layer through roller shaft vibration equipment At the same time, alternately use the leveling plate to level the upper surface of the stone layer 2 to ensure the flatness of the upper surface of the stone layer 2, avoid local overpressure or underpressure, and measure the thickness of the stone layer 2 with a steel ruler. When the thickness of the stone layer 2 reaches the range of 2.75 to 8.5mm, stop the vibration molding, and complete the laying of the stone layer 2. After the laying of the stone layer 2, let it stand for 3 days and then spray 2 evenly on the stone layer 2 with a sprinkler. ～3 times of waterproof bonding material and standing for 24 hours to form waterproof bonding layer 3, after standing for 24 hours, pave asphalt pavement layer 4 on the upper surface of waterproof bonding layer 3.

The paving method of other pavement layers and pavement layers is the same as that of Embodiment 1.

Example 3

Lay the stone layer 2 on the upper surface of the cement concrete structure layer 1 that has not been initially set, evenly spread the stones with a particle size of ^19-26.5mm at a spreading density of 19±1Kg/m2, and vibrate the stone layer through roller shaft vibration equipment At the same time, alternately use the leveling plate to level the upper surface of the stone layer 2 to ensure the flatness of the upper surface of the stone layer 2, avoid local overpressure or underpressure, and measure the thickness of the stone layer 2 with a steel ruler. When the thickness of the stone layer 2 reaches the range of 3.5-12 mm, stop the vibration molding, and complete the laying of the stone layer 2. After the stone layer 2 has been laid, it is left to stand for 3 days and then evenly sprayed on the stone layer 2 with a sprinkler. The waterproof bonding material is used 3 times and left to stand for 24 hours to form a waterproof bonding layer 3. After standing for 24 hours, an asphalt pavement layer 4 is laid on the upper surface of the waterproof bonding layer 3.

The paving method of other pavement layers and pavement layers is the same as that of Embodiment 1.

Claims (2)

1. plant stone Bridge Surface Paving by Cement structure for one kind, it is characterized in that: the upper surface of cement concrete constructions layer (1) is provided with stone layer (2), stone layer (2) upper surface is provided with water-proof tack coat (3), and the upper surface of water-proof tack coat (3) arranges asphalt mixture surfacing (4); Above-mentioned stone layer (2) is choose the building stones of single particle size grating in 4.75 ~ 26.5mm with 5 ~ 20Kg/m at building stones particle diameter ²building stones density spreading.

2. according to claim 1ly plant stone Bridge Surface Paving by Cement structure, it is characterized in that: the thickness of described stone layer (2) is set to 2.75 ~ 13mm.