Assembled prefabricated pervious concrete road base

Abstract

The utility model discloses an assembly type prefabricated pervious concrete road base which comprises a pervious surface layer, a pervious base body and a macadam base body are sequentially arranged at the bottom of the pervious surface layer from top to bottom, and pervious geotextile is arranged between the pervious surface layer and the pervious base body. The permeable base layer is formed by splicing a plurality of prefabricated blocks, each prefabricated block is based on prefabricated high-strength concrete, at least two layers of multiple pairs of reinforcing steel bars which are arranged in a longitudinal and transverse alternating mode are arranged in the high-strength concrete in a penetrating mode, and a plurality of permeable holes are reserved in the high-strength concrete in the interval areas of the reinforcing steel bars which are arranged in the longitudinal and transverse alternating mode. And a water permeable material is arranged in each water permeable hole. On the premise of ensuring sufficient compressive strength, flexural strength and stability of the road structure, the road structure has good water permeability, rainwater can rapidly infiltrate downwards, the problem of water accumulation on the road surface is effectively solved, the urban inland inundation risk is reduced, meanwhile, rainwater is supplemented to underground water, and sustainable utilization and ecological balance of urban water resources are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to road structure technical field especially relates to prefabricated water -permeable concrete road base of assembly type. BACKGROUND

[0002] According to the present situation investigation and study, the existing road structure base is generally impermeable road base, and this impermeable structure causes the following disadvantages:

[0003] 1. Rainwater that can penetrate into the ground is significantly reduced, and the extraction amount of underground water is multiplied, causing the underground water level to drop sharply;

[0004] 2. Water above the ground is difficult to penetrate into the ground, and water below the ground is also difficult to evaporate into the atmosphere, causing the climate conditioning ability to decline, making the climate deteriorate, and the microorganisms in urban soil are difficult to survive;

[0005] 3. When heavy rainfall occurs in a short period of time, a large amount of rainwater cannot penetrate into the ground in time, but can only be discharged into rivers through underground drainage facilities, greatly increasing the burden of drainage facilities, and easily causing social problems such as flooding;

[0006] 4. The impermeable road surface is prone to water accumulation during rainfall, which adversely affects the comfort and safety of vehicle and pedestrian traffic;

[0007] 5. Ordinary water-permeable base is mostly a water-permeable base soil formed by a large particle size aggregate, and a skeleton gap type formed by a certain amount of fine aggregate filling the gap, which often lacks water permeability, stability and compressive and bending strength, and is easily damaged by vehicle rolling.

[0008] In summary, most of the existing impermeable road bases cause problems such as road ponding, waste of rainwater that cannot be replenished to underground water resources, and difficulty in maintaining soil ecological balance. Some water-permeable road bases can solve the aforementioned road ponding problem to some extent, but the stability of the water-permeable base is poor and is easily damaged.

[0009] Therefore, how to improve the structure of the road base to ensure good water permeability while ensuring stability has become a technical problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0010] In view of the above defects of the prior art, the utility model provides a prefabricated water-permeable concrete road base of assembly type, which realizes the purpose of ensuring good water permeability while ensuring sufficient compressive and bending strength and stability.

[0011] To achieve the above technical purpose, the utility model provides assembled prefabricated water permeable concrete road base, including water permeable surface layer, the bottom of water permeable surface layer is sequentially provided with water permeable base layer and macadam base layer from top to bottom, be provided with water permeable geotextile between water permeable surface layer and water permeable base layer;

[0012] Water permeable base layer is composed of a plurality of prefabricated blocks, and each prefabricated block is based on prefabricated high-strength concrete, at least two layers of steel bars are arranged in the high-strength concrete, and a plurality of water permeable holes are reserved in the high-strength concrete between the steel bars.

[0013] Preferably, the adjacent prefabricated blocks of the water permeable base layer are inlaid through the gable structure, and a sealing material is arranged at the connecting joint of the prefabricated block.

[0014] Preferably, the plurality of water permeable holes are uniformly arranged, and the water permeable material in the water permeable hole is medium-coarse sand.

[0015] Preferably, the high-strength concrete is Portland cement, and the macadam base layer is graded macadam or pebble.

[0016] The utility model has the advantages that:

[0017] The utility model has the advantages that: under the premise of ensuring that the road structure has sufficient compressive strength, bending strength and stability, the utility model has good water permeability, can quickly infiltrate rainwater, effectively solves the problem of road ponding, reduces the risk of urban waterlogging, replenishes groundwater with rainwater, and is beneficial to the sustainable use of urban water resources and ecological balance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The structure of the utility model is shown in the figure;

[0019] Fig. 2 The plane structure of a single prefabricated block of the water permeable base layer in the utility model is shown in the figure;

[0020] Fig. 3 The structure of the plurality of prefabricated blocks of the water permeable base layer after assembly in the utility model is shown in the figure.

[0021] In the figure: 1 water permeable surface layer, 2 water permeable base layer, 21 high-strength concrete, 22 steel bar, 23 water permeable hole, 3 macadam base layer, 4 water permeable geotextile. DETAILED DESCRIPTION

[0022] The concept, specific structure and technical effects of the utility model will be further described in combination with the drawings to fully understand the purpose, features and effects of the utility model.

[0023] Embodiment:

[0024] As Figs. 1-3 shown, the prefabricated permeable concrete road base is assembled, including a permeable surface layer 1, the bottom of the permeable surface layer 1 is sequentially provided with a permeable base layer 2 and a gravel base layer 3 from top to bottom, and a permeable geotextile 4 is arranged between the permeable surface layer 1 and the permeable base layer 2.

[0025] The permeable base layer 2 is composed of a plurality of prefabricated blocks, and each prefabricated block is based on prefabricated high-strength concrete 21, at least two layers of steel bars 22 are arranged in the high-strength concrete 21, a plurality of permeable holes 23 are reserved in the high-strength concrete 21 between the steel bars 22, and a permeable material is arranged in each permeable hole 23.

[0026] The main innovation of the utility model lies in that the prefabricated permeable base layer 2 has high strength and good permeability.

[0027] Specifically, the permeable geotextile 4 is located between the permeable surface layer 1 and the permeable base layer 2, when rainwater infiltrates from the road surface to the permeable base layer 2, the permeable geotextile 4 can achieve the effect of filtering sundries for the first time.

[0028] The plurality of permeable holes 23 are uniformly arranged, and the permeable material in the permeable hole 23 is medium-coarse sand.

[0029] The high-strength concrete 21 is Portland cement, and the gravel base layer 3 is graded gravel or pebble.

[0030] The permeable base layer 2 and the gravel base layer 3 form a road base, the gravel base layer 3 is composed of well-graded gravel or pebble; the permeable base layer 2 is composed of high-strength grade Portland cement or ordinary Portland cement, cooperated with two layers of steel bars 22 arranged in a longitudinal and transverse manner, the steel bars 22 are uniformly arranged with permeable holes 23 with a diameter of 10 cm in the middle (the hole spacing is 38 cm in longitudinal and transverse directions. The diameter and spacing of the permeable holes 23 can be adjusted according to actual permeability requirements), and the permeable holes 23 are filled with medium-coarse sand as the permeable material; the rainwater on the road surface first passes through the permeable surface layer 1, then passes through the permeable geotextile 4 to the prefabricated permeable base layer 2, and finally rapidly infiltrates into the soil layer below the gravel base layer 3 through the permeable holes 23 filled with medium-coarse sand.

[0031] More specifically, the pore structure: the prefabricated permeable base layer 2 is arranged with a large number of permeable holes 23 at a certain spacing, and the permeable holes 23 can be controlled between 15% and 35%. These permeable holes 23 are interconnected, so that the rainwater can rapidly infiltrate through the permeable base layer 2 and the gravel base layer 3, enter the underground drainage system or the soil, thereby effectively reducing the road surface water.

[0032] Strength characteristics: although the water permeability of the water permeable hole 23 is emphasized, the prefabricated water permeable base layer 2 is provided with high-strength concrete 21 and increases the steel bars 22 arranged in longitudinal and transverse directions, and still has high strength, bearing capacity and stability to bear the vehicle load and pedestrian load transmitted from the road surface; the specific strength requirement can be effectively adjusted by the grade of the high-strength concrete 21 and the steel bars 22 according to different engineering application scenes and design standards.

[0033] The prefabrication process of the water permeable base layer 2 in the utility model:

[0034] Mold making: the mold for prefabricating the high-strength concrete 21 component is made according to the design requirements, the size of the mold is 2.0m*2.0m (the size can also be prefabricated as 1.0m*1.0m according to the actual situation) and the shape is accurate to ensure the size accuracy and appearance quality of the prefabricated block. The mold can be made of steel mold, plastic mold or other materials.

[0035] Steel bar 22 binding: the processed steel bars 22 are arranged in longitudinal and transverse directions in the mold in double layers and are bound.

[0036] Mixing of high-strength concrete 21: the cement, aggregate, water and admixture and other materials are mixed according to a certain mixing ratio, the mixing time and mixing speed need to be controlled according to the performance requirements of the concrete to ensure the uniformity and workability of the concrete.

[0037] Pouring and forming: the mixed high-strength concrete 21 is poured into the mold, and a vibrating table or a vibrating rod and other equipment are used for vibrating to make the concrete dense, remove the internal bubbles and ensure the strength of the prefabricated block. The water permeable hole 23 is not poured.

[0038] Curing: after the prefabricated block is formed, curing is needed to ensure the strength and durability of the high-strength concrete 21. The curing methods include natural curing and steam curing, and the curing time is generally 7-28 days.

[0039] Construction process of the utility model:

[0040] Base treatment: before laying the prefabricated water permeable base layer 2, the gravel base 3 needs to be treated to ensure that the gravel base 3 is flat, solid and has sufficient bearing capacity.

[0041] Laying method: the prefabricated blocks of the prefabricated water permeable base layer 2 are directly laid on the roadbed, and are inlaid by adjusting the alignment of the eaves reserved on the prefabricated blocks to make them tightly jointed.

[0042] Connection treatment: the adjacent prefabricated blocks are effectively connected and sealed; cement mortar pointing or using rubber sealing materials and other methods can be used to increase the integrity and stability of the base.

[0043] Water-permeable hole 23 filling: the diameter φ10cm water-permeable hole 23 reserved in the assembled precast block is filled and compacted with medium-coarse sand; after the assembly of the water-permeable base layer 2 is completed, the water-permeable geotextile 4 is fully paved, and then the construction of the water-permeable surface layer 1 of the road is carried out.

[0044] In summary, the utility model has the advantages of:

[0045] 1. Excellent water-permeable performance: effectively solves the problem of road ponding, reduces the risk of urban waterlogging, and allows rainwater to replenish groundwater, which is conducive to the sustainable use of urban water resources and ecological balance.

[0046] 2. High strength and stability: compared with some traditional water-permeable road structures, it can better withstand traffic loads, has a long service life, and reduces maintenance and replacement costs.

[0047] 3. Convenient and efficient construction: the prefabricated water-permeable base layer 2 is produced in a factory, the quality is easy to control, the construction speed is fast on site, and the impact on traffic and the surrounding environment is small.

[0048] 4. Application scenarios: can be widely used in urban carriageways, bicycle paths, parking lots, squares, park roads, etc., especially suitable for areas with dual requirements for water-permeable performance and load-bearing capacity. In the construction of sponge cities, this assembled prefabricated water-permeable base layer 2 will play an important role and is one of the key infrastructure for realizing natural rainwater circulation and urban green development.

[0049] The above detailed the preferred embodiments of the utility model. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the utility model. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the existing technology according to the concept of the utility model shall be within the protection scope determined by the claims.

Claims

1. A prefabricated permeable concrete road base in sections, comprising a permeable surface layer, characterised in that: The bottom of the water-permeable surface layer is sequentially provided with a water-permeable base layer and a gravel base layer from top to bottom, and a water-permeable geotextile is arranged between the water-permeable surface layer and the water-permeable base layer. The water-permeable base layer is assembled by a plurality of prefabricated blocks, each of which is based on prefabricated high-strength concrete, at least two layers of steel bars are arranged in the high-strength concrete, and a plurality of water-permeable holes are reserved in the high-strength concrete in the interval area of the steel bars.

2. The assembled precast pervious concrete road base according to claim 1, wherein: The adjacent prefabricated blocks of the water-permeable base layer are inlaid through a gable structure, and a sealing material is arranged at the connecting joint of the prefabricated blocks.

3. The assembled precast pervious concrete road base according to claim 1 or 2, characterized in that: The water-permeable holes are uniformly arranged, and the water-permeable material in the water-permeable holes is medium-coarse sand.

4. The assembled precast pervious concrete road base of claim 3, wherein: The high-strength concrete is Portland cement, and the gravel base layer is graded gravel or pebble.

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