CN102587243B - Urban road water permeability cement concrete pavement structure and construction process thereof - Google Patents

Abstract

The invention discloses an urban road water permeability cement concrete pavement structure and a construction process thereof. The pavement structure comprises an asphalt stable water draining base layer paved on a roadbed and a road surface layer paved on the asphalt stable water draining base layer, wherein the road surface layer is a first road surface layer or a second road surface layer composed of a lower surface layer and an upper surface layer paved on the lower surface layer, a plurality of water permeability pile bodies are arranged in the roadbed, the water permeability pile bodies are polyvinyl chloride (PVC) tubular pile bodies, lower portion pile bodies of the PVC tubular pile bodies are sleeved in first PVC tubes provided with water permeable holes, and upper portion pile bodies are sleeved in second PVC tubes. The construction process comprises the steps of pressing the roadbed; drilling pile holes; constructing water permeable pile bodies; constructing the asphalt stable water draining base layer; and constructing the road surface layer. The structure is reasonable in design, convenient to construct, good in using effect and capable of having capacity of absorbing heat and enabling rain to seep and effectively resolving the actual problems in ordinary cement concrete road surfaces.

Description

Urban Road Permeable Cement Concrete Pavement Structure

technical field

The invention belongs to the technical field of urban road pavement structure construction, in particular to a permeable cement concrete pavement structure for urban roads.

Background technique

The surface of modern cities is constantly covered by reinforced concrete buildings and impermeable roads. Ordinary cement concrete paved roads bring great convenience to people's travel and commodity circulation, although they improve production efficiency and quality of life. , but compared with natural soil, ordinary cement concrete pavement lacks the ability to absorb heat and infiltrate rainwater, which brings a series of problems:

First, the amount of rainwater that can infiltrate into the ground has decreased significantly, while industrial production and modern life have doubled the amount of groundwater extracted, resulting in a sharp drop in the groundwater level, insufficient water in the soil, lack of oxygen, and rising ground temperature, etc., thus directly affecting the environment. The health of urban vegetation has further exacerbated the problems of drought and water shortage in cities.

Second, impermeable pavement is difficult to exchange heat and humidity with the air, which is prone to produce the "heat island effect", which makes the temperature inside the city too high, leading to climate deterioration;

Third, when there is concentrated rainfall in a short period of time, a large amount of rainwater can only be discharged into the river through underground drainage facilities, which greatly increases the burden on the drainage facilities, and the roads are prone to water accumulation, which brings a negative impact on the comfort and safety of vehicles and pedestrians. Negative Effects.

At present, macroporous permeable concrete, as a new environment-friendly and ecological road material, has been paid more and more attention by people. But nowadays, most of the research in China is just to simply pass the rainwater through the pavement structure. In order not to reduce the strength of the roadbed, it is drained from the whole road before it enters the roadbed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a permeable cement concrete pavement structure for urban roads with reasonable structural design, convenient construction, good use effect and water permeable function in view of the above-mentioned deficiencies in the prior art.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a permeable cement concrete pavement structure for urban roads, characterized in that it includes an asphalt-stabilized drainage base paved on the roadbed and paved with asphalt-stabilized macadam And the pavement pavement paving on the asphalt stable drainage base; the road pavement is road pavement one or pavement pavement two composed of the lower layer and the upper layer paved on the lower layer, the road pavement One is a large-void open-graded drainage asphalt wear course or a porous cement concrete pavement pavement paved by porous cement concrete pavement materials, and the upper layer is paved by porous cement concrete pavement materials or is a large-void Open graded drainage type asphalt wear layer and the lower layer is a large gap open graded drainage type asphalt wear layer; the roadbed is equipped with multiple permeable piles with the same structure and size, and multiple permeable piles They are all arranged vertically, and a plurality of pile holes for the installation of the plurality of permeable piles are correspondingly arranged in the roadbed, and the top elevations of the plurality of permeable piles are all the same as the upper part of the roadbed. The elevation is the same; multiple permeable piles are arranged in an equilateral triangle and the distance between two adjacent permeable piles is 1.5m to 1.8m, and the pile length of the permeable piles is 5m to 6m;

The permeable pile body is a PVC pipe-type pile body; the PVC pipe-type pile body includes a PVC pipe inserted in the pile hole and a gradation gravel or porous ceramic material densely filled in the PVC pipe. Pile body, the pile body is divided into an upper pile body section and a lower pile body section with the lower limit value Za of the depth of the subgrade work area of the roadbed as a boundary, and the PVC pipe includes a PVC pipe one and is located directly above the PVC pipe one and has a structure and PVC pipe 2 with the same size; the lower pile body is set in PVC pipe 1, and the outer wall of the PVC pipe 1 has a plurality of evenly arranged permeable holes, the structure and size of which are the same And they are all circular through holes, and the distance between two adjacent water permeable holes is 10cm±2cm.

The above-mentioned urban road permeable cement concrete pavement structure is characterized in that: a layer of impermeable geotextile is paved on the upper surface of the roadbed.

The above-mentioned urban road permeable cement concrete pavement structure is characterized in that: the roadbed includes an undisturbed soil subgrade after smoothing and compaction treatment, and a cement-soil pavement layer or a lime-soil pavement layer paved on the undisturbed soil subgrade.

The above-mentioned urban road permeable cement concrete pavement structure is characterized in that: the cement-soil pavement layer is made of cement-soil pavement, and the cement-soil is a consolidated body formed by mixing cement slurry and soil, and the The wet density of the cement soil is 1.83g/m ³ to 1.85g/m ³ , the amount of cement in the cement soil per cubic meter is 345kg to 350kg, and the water-cement ratio of the cement slurry is 0.8; the lime soil paving The filling layer is paved with lime soil, and the lime soil is uniformly mixed with lime and soil in a mass ratio of 11±1:100±10.

The above-mentioned urban road permeable cement concrete pavement structure is characterized in that: the inner walls of the first PVC pipe and the second PVC pipe are lined with a layer of permeable geotextile.

The above-mentioned urban road permeable cement concrete pavement structure is characterized in that: the layer thickness of the road surface layer is 140 mm to 150 mm, the layer thickness of the asphalt stable drainage base is 150 mm to 200 mm; the layer thickness of the lower layer is 100 mm ± 10 mm , the layer thickness of the upper layer is 40mm-50mm; the layer thickness of the cement-soil pavement layer or the lime-soil pavement layer is 130mm-150mm.

The above-mentioned urban road permeable cement concrete pavement structure is characterized in that: the PVC tubular pile body is a cylindrical pile with a pile diameter of Φ20cm～Φ30cm or a square pile with a cross-sectional size of (15cm±2cm)×(15cm±2cm); And when the PVC pipe type pile body is a cylindrical pile, the PVC pipe one and PVC pipe two are circular pipes; and when the PVC pipe type pile body is a square pile, the PVC pipe one and PVC pipe two are circular pipes; The second tube is a square tube; the permeable hole is a through hole that gradually slopes downward from the inside to the outside, and the angle between it and the vertical direction is 30°-45°.

At the same time, the invention also discloses a construction process for urban road permeable cement concrete pavement structure with simple process steps, convenient implementation, fast construction speed and good construction effect, which is characterized in that the process includes the following steps:

Step 1. Subgrade compaction: adopt conventional subgrade compaction methods, and compact the pre-leveled subgrade according to the pre-designed compaction degree requirements to obtain a constructed subgrade;

Step 2. Pile hole drilling: Drilling a plurality of piles from top to bottom on the subgrade constructed in step 1 according to the pre-measurement and setting-out results of a plurality of pile holes by using drilling equipment hole; the structure and size of a plurality of said pile holes are all the same, and a plurality of said pile holes are divided into the upper pile hole section and the lower pile with the lower limit value Za of the depth of the subgrade work area of the subgrade described in step 1 as the boundary Hole segment;

Step 3, construction of permeable piles, the construction process is as follows:

Step 301, PVC pipe 1 installation: Press PVC pipe 1 with a plurality of permeable holes on the side wall and the same length as the lower pile hole section into the lower part of the pile hole where the PVC pipe type pile body currently under construction is located in the pile hole section;

Step 302, installing the second PVC pipe: press the second PVC pipe with the same length as the upper pile hole section into the upper pile hole section of the pile hole described in step 301;

Step 303, pile body construction: densely fill the graded crushed stone or porous ceramic material in the pile hole described in step 301, and then use the conventional roadbed compaction method to compact the roadbed filled with the graded crushed stone again solid treatment, so that the subgrade and the graded crushed stone filled in the pile holes form an integral body, and the completed pile body is obtained;

Step 304, repeating steps 301 to 303 multiple times until the construction process of multiple PVC tubular piles is completed;

When the PVC pipe 1 and the PVC pipe 2 are integrated PVC pipes, after the integral PVC pipe is pressed into the pile hole, the installation process of the PVC pipe 1 and the PVC pipe 2 is completed synchronously ;

Step 4, asphalt stabilized drainage base construction: according to the construction method of conventional asphalt stabilized drainage base, on the subgrade constructed in step 3, lay a layer of asphalt stabilized drainage base;

Step 5. Road surface construction: According to the conventional road surface construction method, the road surface is laid on the asphalt stable drainage base constructed in step 4.

The above-mentioned process is characterized in that: the subgrade described in step one includes the undisturbed soil subgrade after leveling and compaction treatment and the cement-soil pavement layer or lime soil pavement layer paved on the undisturbed soil subgrade; in step one When carrying out subgrade compaction, first adopt conventional subgrade compaction methods, and compact the pre-leveled undisturbed soil subgrade according to the pre-designed compaction degree requirements; after that, pave cement soil or Lime soil, and adopt the conventional subgrade compaction method, and re-compact the paved cement soil or lime soil according to the pre-designed compaction degree requirements, and complete the cement soil pavement layer or lime soil pavement layer accordingly During the paving process, a constructed subgrade is obtained.

The above process is characterized in that: before the construction of the permeable pile body in step 3, a layer of impermeable geotextiles needs to be laid on the roadbed, and the impermeable geotextiles are correspondingly provided with supply A plurality of through holes through which the plurality of permeable piles pass; the lower limit value Za of the depth of the subgrade work area described in step 2 is the lower limit value determined according to the conventional method for determining the lower limit value Za of the depth of the subgrade work area Za, and when determining the lower limit value Za of the depth of the subgrade work area, according to the formula In the formula, K is a coefficient and K=0.5, P is the axle load on one side and its unit is KN, n is a coefficient and n=5~10, γ is the weight of soil and its unit is kN/m ³ .

Compared with the prior art, the present invention has the following advantages:

1. The design of the pavement structure is reasonable. Permeable cement concrete is used as the pavement surface layer, asphalt stabilized gravel as the pavement base, and the inside of the subgrade is drilled and filled with graded gravel to form a permeable pile, thus finally forming a brand new overall pavement structure.

2. The permeable cement pavement layer is used as the pavement surface layer, which can quickly infiltrate the rainwater into the base layer to reach the subgrade, and reach the ground through the drilled holes, so that the groundwater resources can be replenished in time. At the same time, the road surface is easy to construct. It can be a large-gap open-graded drainage asphalt wear course or a porous cement concrete pavement pavement made of porous cement concrete pavement materials, or it can be made of the underlying layer and pavement. The upper layer is composed of the upper layer on the lower layer, wherein the upper layer is paved with porous cement concrete pavement materials, and the lower layer is a large-void open-graded drainage type asphalt wear layer.

3. The bored subgrade with multiple permeable piles inside is directly connected with the underground soil to further enhance the permeable performance. At the same time, the structure design of the permeable pile is reasonable, which is PVC tubular pile; PVC tubular pile The body includes a PVC pipe inserted into the pile hole and a pile body formed of graded crushed stone or porous ceramic material densely filled in the PVC pipe. The pile body is divided into the upper part by the lower limit value Za of the subgrade working area depth The pile body section and the lower pile body section, the PVC pipe includes PVC pipe one and PVC pipe two which are located directly above the PVC pipe one and have the same structure and size; the lower pile body section is sleeved in the PVC pipe one, and the outer wall of the PVC pipe one has A plurality of permeable holes are evenly arranged, and the upper pile body is set in the second PVC pipe.

4. The pavement structure adopted in the present invention has no surface water and no reflection at night, which effectively improves the comfort and safety of vehicles and pedestrians.

5. The use effect is good and has the function of permeating water. Since the present invention adopts the permeable pavement surface layer, the asphalt stabilized gravel base and the drilled roadbed as a brand-new pavement structure layer, it directly communicates with the underground soil and can accumulate more water. Heat and moisture greatly alleviate the urban "heat island effect", and can effectively infiltrate road rainwater into the ground, so that it can achieve the purpose of restoring groundwater.

6. When rainfall is concentrated, the pavement structure adopted in the present invention can reduce the burden on drainage facilities and prevent urban waterlogging.

7. The process steps are simple, the realization is convenient, the construction speed is fast, and the construction effect is good. During actual construction, the subgrade is compacted first, and then holes are drilled in the compacted subgrade according to a certain order, and then the PVC pipe with the same depth as the drilled hole is cut off, and then the depth of the subgrade work area is adjusted according to the depth of the subgrade work area. Drill holes on the PVC pipe, then press the PVC pipe into the drilled hole, insert graded gravel, and re-compact; then carry out the construction of the asphalt-stabilized drainage base and road surface.

8. The construction quality is easy to guarantee, because the water passing through the road surface during the construction process will drill holes inside the roadbed before entering the roadbed, and then use geotextiles to seal the surface of the roadbed and the inside of the drilled holes, and gradate Stones are stuffed into the drilled holes and compacted, so that the drilled holes can form a good whole with the roadbed, and the bearing capacity of the roadbed will not be reduced due to drilling, and the strength will not be weakened. In this way, graded crushed stones are stuffed and compacted again After that, the strength of the subgrade will be improved to a certain extent.

9. The scope of application is wide, not only suitable for light traffic roads, such as city squares, sidewalks in parks, etc.; but also applicable to the construction of various lines of urban traffic.

To sum up, the present invention has reasonable structural design, convenient construction, good use effect, ability to absorb heat and penetrate rainwater, and can effectively solve various practical problems existing in the existing ordinary cement concrete pavement.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the structural representation of the permeable cement concrete pavement structure adopted by the present invention.

Fig. 2 is a block diagram of a method for constructing a permeable cement concrete pavement structure using the present invention.

Fig. 3 is a schematic structural view of the monolithic PVC pipe adopted in the present invention.

Explanation of reference signs:

1—undisturbed soil subgrade; 2—asphalt stabilized drainage base; 3-1—underlying layer;

3-2—upper layer; 4—pile body; 5—permeable geotextile;

7—PVC pipe one; 8—Permeable hole; 9—PVC pipe two;

10—impermeable geotextile; 11—cement soil pavement layer.

Detailed ways

A kind of urban road permeable cement concrete pavement structure as shown in Figure 1, comprises the asphalt stable drainage base 2 that is paved on the roadbed and formed by asphalt stabilized macadam pavement and paved on the asphalt stable drainage base 2 road surface. The road surface layer is road surface layer one or road surface layer two composed of the lower layer 3-1 and the upper layer 3-2 paved on the lower layer 3-1, and the road surface layer one is a large gap opening Graded drainage asphalt wear course or porous cement concrete pavement pavement layer paved with porous cement concrete pavement material, the upper layer 3-2 is paved with porous cement concrete pavement material or open-grade with large voids Drainage-type asphalt wear layer and the lower layer 3-1 is a large-gap open-graded drainage-type asphalt wear layer. A plurality of permeable piles with the same structure and size are arranged inside the subgrade, and the plurality of permeable piles are arranged vertically, and a plurality of permeable piles are respectively provided in the subgrade for a plurality of the permeable piles. In the pile holes where the permeable piles are installed, the elevations of the tops of the multiple permeable piles are all the same as the elevations of the upper parts of the subgrade. The plurality of permeable piles are arranged in an equilateral triangle and the distance between two adjacent permeable piles is 1.5m-1.8m, and the pile length of the permeable piles is 5m-6m.

The permeable pile body is a PVC pipe type pile body. The PVC tubular pile body includes a PVC pipe inserted into the pile hole and a pile body 4 formed of graded gravel or porous ceramic material densely filled in the PVC pipe, and the pile body 4 is formed by the roadbed The lower limit value Za of the depth of the subgrade work area is divided into an upper pile body section and a lower pile body section, and the PVC pipe includes a PVC pipe one 7 and a PVC pipe two 9 that is directly above the PVC pipe one 7 and has the same structure and size. The lower pile body section is set in the PVC pipe-7, and the outer wall of the PVC pipe-7 is provided with a plurality of evenly arranged permeable holes 8, the structure and size of the plurality of permeable holes 8 are the same and are all round. Shaped through holes, the distance between two adjacent water permeable holes 8 is 10cm ± 2cm.

During actual construction, the construction method and raw materials used for the asphalt stabilized drainage base 2 are the same as the construction methods and raw materials used in the construction of conventional asphalt stabilized drainage bases.

And the pile body material of the pile body 4 of the PVC tubular pile body is graded crushed stone or porous ceramic material.

The graded crushed stone is uniformly mixed with coarse aggregate and fine aggregate. Among them, the particle composition of coarse aggregate is shown in Table 1:

Table 1 Particle composition of coarse aggregate

The particle composition and plasticity index requirements of the above fine aggregates are shown in Table 2

Table 2 Particle composition and plasticity index requirements of fine aggregates

The flexural strength of the porous ceramic material is >2.94Mpa, the water permeability coefficient is >0.03mm/s, and the friction coefficient is >0.46.

During actual construction, the PVC tubular pile body is a cylindrical pile with a pile diameter of Φ20cm～Φ30cm or a square pile with a cross-sectional size of (15cm±2cm)×(15cm±2cm); and when the PVC tubular pile body is In the case of cylindrical piles, the first PVC pipe 7 and the second PVC pipe 9 are circular pipes; and when the PVC tubular pile body is a square pile, the first PVC pipe 7 and the second PVC pipe 9 are square pipes . In this embodiment, the water permeable hole 8 is a through hole that gradually slopes downward from the inside to the outside, and the angle between it and the vertical direction is 30°-45°.

In this embodiment, the PVC tubular pile body is a cylindrical pile. During actual construction, the PVC tubular pile body can also be set as a square pile.

In this embodiment, a layer of impermeable geotextile 10 is paved on the upper surface of the roadbed.

The inner walls of the first PVC pipe 7 and the second PVC pipe 9 are lined with a layer of permeable geotextile 5 . In this embodiment, the first PVC pipe 7 and the second PVC pipe 9 are manufactured as one.

In this embodiment, the roadbed includes an undisturbed soil subgrade 1 after leveling and compaction treatment, and a cement-soil pavement layer 11 or a lime-soil pavement layer paved on the undisturbed soil subgrade 1 . That is to say, the tops of the plurality of permeable piles are all flush with the upper part of the cement-soil pavement layer 11 or the lime-soil pavement layer.

In actual use, the cement-soil pavement layer 11 or the lime-soil pavement layer is arranged to prevent water seepage inside the roadbed.

The cement-soil pavement layer 11 is paved by cement-soil, which is a consolidated body formed by mixing cement slurry and soil, and the wet density of the cement-soil is 1.83g/m ³ -1.85 g/m ³ , the amount of cement in the cement soil per cubic meter is 345kg-350kg, and the water-cement ratio of the cement slurry is 0.8; the lime soil pavement layer is paved with lime soil, and the lime soil The soil is uniformly mixed with lime and soil according to the mass ratio of 11±1:100±10.

In this embodiment, the cement content (mass percentage) in the cement slurry is 19%. The optimal water content (mass percentage) of the lime soil is 20%.

During actual construction, the layer thickness of the cement-soil pavement layer 11 or the lime-soil pavement layer is 130mm-150mm.

In this embodiment, the layer thickness of the road surface layer is 140mm-150mm, and the layer thickness of the asphalt-stabilized drainage base 2 is 150mm-200mm.

In the gradation composition of the asphalt stabilized drainage base 2, the nominal maximum particle size is 25 mm. The gradation composition of the asphalt-stabilized drainage base 2 is shown in Table 3:

Table 3: Statistical table of gradation composition of asphalt stabilized drainage base 2

The layer thickness of the lower layer 3-1 is 50 mm±10 mm, and the layer thickness of the upper layer 3-2 is 90 mm˜100 mm. During actual construction, the layer thickness of the road surface layer, the layer thickness of the asphalt stabilized drainage base 2, the layer thickness of the lower layer 3-1, and the layer thickness of the upper layer 3-2 can be adjusted accordingly according to specific needs. In this embodiment, the layer thickness of the upper layer 3-2 is 40 mm, and the layer thickness of the lower layer 3-1 is 100 mm.

In this embodiment, the upper layer 3-2 uses OGFC-10 with a porosity of 15%-20%; the lower layer 3-1 uses OGFC-16 with a porosity of 15%-20%.

During actual construction, the permeable geotextile 5 has a thickness of 2.2mm±0.2mm, a specification of 150g/m ² -250g/m ² and a water permeability coefficient of 0.01mm/s. The thickness of the impermeable geotextile 10 is 2.2mm±0.2mm and its specification is 100g/m ² -200g/m ² .

In this embodiment, the permeable geotextile 5 has a thickness of 2.2 mm, a specification of 150 g/m ² -250 g/m ² , and a water permeability coefficient of 0.01 mm/s. The impermeable geotextile 10 has a thickness of 2.2mm and a specification of 100g/m ² -200g/m ² . Among them, impermeable waterproof cloth is also called waterproof geotextile.

In this embodiment, the road surface layer is the second road surface layer composed of the lower layer 3-1 and the upper layer 3-2 paved on the lower layer 3-1.

Wherein, the water-cement ratio of the porous cement concrete pavement material used in the upper layer 3-2 is 0.32 and its 7-day compressive strength is 18Mpa-19Mpa.

During actual construction, the porous cement concrete pavement material is evenly mixed with silicon powder to form a mixture, and the weight percentage of the added silicon powder in the mixture is 6%±0.5%. Here, the purpose of adding silica fume is to strengthen the porous cement concrete pavement material.

A kind of urban road permeable cement concrete pavement structure construction technology as shown in Figure 2 comprises the following steps:

Step 1. Subgrade compaction: adopt conventional subgrade compaction methods, and compact the pre-leveled subgrade according to the pre-designed compaction degree requirements to obtain a constructed subgrade.

In this embodiment, the roadbed described in step 1 includes the undisturbed soil roadbed 1 after smoothing and compacting treatment and the cement-soil pavement layer 11 or lime soil pavement layer paved on the undisturbed soil roadbed 1; step 1 When carrying out subgrade compaction in the middle, first adopt the conventional subgrade compaction method, and compact the pre-leveled undisturbed soil subgrade 1 according to the pre-designed compaction degree requirements; Cement soil or lime soil, and adopt conventional subgrade compaction methods, and re-compact the paved cement soil or lime soil according to the pre-designed compaction degree requirements, and complete the cement soil pavement layer 11 or lime soil accordingly The paving process of the pavement layer obtains the subgrade formed by construction.

Step 2. Pile hole drilling: Drilling a plurality of piles from top to bottom on the subgrade constructed in step 1 according to the pre-measurement and setting-out results of a plurality of pile holes by using drilling equipment hole; the structure and size of a plurality of said pile holes are all the same, and a plurality of said pile holes are divided into the upper pile hole section and the lower pile with the lower limit value Za of the depth of the subgrade work area of the subgrade described in step 1 as the boundary hole segment.

When actually drilling, the depth of the drilled hole can be adjusted accordingly according to specific needs, and the drilled hole depth can preferably be drilled to the bottom of the roadbed and reach the groundwater layer.

Step 3, construction of permeable piles, the construction process is as follows:

Step 301, PVC pipe 1 installation: press PVC pipe 1 7 which has a plurality of permeable holes 8 on the side wall and the same length as the lower pile hole section, into the pile hole where the PVC pipe type pile body currently under construction is located in the lower pile hole section.

Step 302, installation of the second PVC pipe: press the PVC pipe II 9, which has the same length as the upper pile hole section, into the upper pile hole section of the pile hole described in step 301.

Step 303, pile body construction: densely fill the graded crushed stone or porous ceramic material in the pile hole described in step 301, and then use the conventional roadbed compaction method to compact the roadbed filled with the graded crushed stone again The subgrade and the graded crushed stones filled in the pile holes form an integral body, and the completed pile body 4 is obtained.

Step 304, repeating steps 301 to 303 multiple times until the construction process of multiple PVC tubular piles is completed.

When the PVC pipe one 7 and the PVC pipe two 9 are integral PVC pipes made by processing, after the integral PVC pipe is pressed into the pile hole, the PVC pipe one 7 and the PVC pipe two are synchronously completed. 9, that is, step 301 and step 302 can be completed at one time.

Step 4. Construction of asphalt stabilized drainage base: According to the conventional construction method of asphalt stabilized drainage base, a layer of asphalt stabilized drainage base 2 is laid on the subgrade constructed in step 3.

Step 5. Road surface construction: according to the conventional road surface construction method, the road surface is laid on the asphalt-stabilized drainage base 2 constructed in step 4.

In this embodiment, before the construction of the permeable pile body in step 3, a layer of impermeable geotextile 10 needs to be laid on the roadbed, and the impermeable geotextile 10 is correspondingly provided with a A plurality of through holes through which the plurality of water-permeable piles pass. The lower limit value Za of the depth of the subgrade working area described in step 2 is the lower limit value Za determined according to the conventional method for determining the lower limit value Za of the depth of the subgrade working area, and when the lower limit value Za of the depth of the subgrade working area is determined, According to the formula Determine, where K is a coefficient and K=0.5, P is the axle load on one side and its unit is KN, n is a coefficient and n=5～10, γ is the weight (or bulk density) of the soil and its unit is kN/ m ³ .

In this embodiment, a plurality of said permeable holes 8 are arranged in an equilateral triangle.

In this embodiment, the PVC pipe 1 7 and the PVC pipe 2 9 have the same cross-sectional structure and size, and the wall thickness of the two is 2mm-3mm. The diameter of the permeable holes 8 is Φ3cm˜Φ4cm, and the distance between two adjacent permeable holes 8 is 10cm. During specific processing, the aperture, inclination angle and distance between two adjacent water permeable holes 8 can be adjusted accordingly according to actual needs.

In this embodiment, referring to FIG. 3 , the first PVC pipe 7 and the second PVC pipe 9 are manufactured as one. During actual construction, the internal structure and size of the PVC pipe one 7 and the PVC pipe two 9 are the same as the external structure and size of the pile body 4, and the external structures and dimensions of the PVC pipe one 7 and PVC pipe two 9 are the same as those of the pile body 4. The dimensions are all the same as the internal structure and dimensions of the pile holes.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (9)

1. a urban road water permeability cement concrete pavement structure, is characterized in that: comprise and mating formation on roadbed and by Asphalt Stabilized Macadam the mat formation Asphalt treated permeable base (2) forming and the surface course of mating formation on Asphalt treated permeable base (2); Described surface course is surface course one or by lower surface layer (3-1) be paved on the surface course two that the upper layer (3-2) on lower surface layer (3-1) forms, described surface course one is for large space open gradation drainage type asphalt wearing layer or by the parameters of porous cement concrete pavement material parameters of porous cement concrete pavement that the forms layer of mating formation of mating formation, described upper layer (3-2) by parameters of porous cement concrete pavement material mat formation form or for large space open gradation drainage type asphalt wearing layer and lower surface layer (3-1) be large space open gradation drainage type asphalt wearing layer; Described roadbed inside is laid with all identical water permeability pile bodies of a plurality of structures and size, a plurality of described water permeability pile bodies are all vertically to laying, and in described roadbed, correspondence is provided with a plurality of stake holes of installing for a plurality of described water permeability pile bodies respectively, and the top absolute altitude of a plurality of described water permeability pile bodies is all identical with the top absolute altitude of described roadbed; A plurality of described water permeability pile bodies be that equilateral triangle is laid and adjacent two described water permeability pile bodies between spacing be 1.5m～1.8m, the stake of described water permeability pile body is long is 5m～6m;

Described water permeability pile body is pvc pipe formula pile body; Described pvc pipe formula pile body comprises the pvc pipe that is plugged in described stake hole and is filled in by closely knit the pile body (4) that graded broken stone in pvc pipe or porous ceramic film material form, described pile body (4) is divided into top pile body section and bottom pile body section with roadbed work area degree of depth lower limit ZaWei circle of described roadbed, and described pvc pipe comprises pvc pipe one (7) and is positioned at directly over pvc pipe one (7) and the equal identical pvc pipe two (9) of structure and size; Described bottom pile body section is set in pvc pipe one (7), on the lateral wall of described pvc pipe one (7), have a plurality of permeable holes (8) that are even laying, the structure of a plurality of permeable holes (8) and size are all identical and be manhole, and the spacing between adjacent two described permeable holes (8) is 10cm ± 2cm;

The construction technology of this pavement structure comprises the following steps:

Step 1, subgrade compaction: adopt conventional subgrade compaction method, and according to the compaction requirement of design in advance, the roadbed after smooth is in advance carried out to compacting, obtain the roadbed of construction molding;

Step 2, stake hole drill are got: adopt rig and according to the measurement unwrapping wire result to a plurality of described stakes holes in advance, drill through a plurality of described stakes holes in step 1 on the described roadbed of construction molding from top to bottom; Structure and the size in a plurality of described stakes holes are all identical, and a plurality of described stake Kong Jun is divided into stake hole, Duan He bottom, stake hole, top section with roadbed work area degree of depth lower limit ZaWei circle of roadbed described in step 1;

Step 3, the construction of water permeability pile body, its work progress is as follows:

Step 301, pvc pipe one are installed: will on sidewall, have the pvc pipe one (7) that a plurality of permeable holes (8) and length are identical with stake hole, described bottom segment length, be pressed in stake hole, the bottom section in current constructed pvc pipe formula pile body stake of living in hole;

Step 302, pvc pipe two are installed: by the length pvc pipe two (9) identical with stake hole, described top segment length, be pressed in stake hole, the top section in the hole of stake described in step 301;

Step 303, pile body construction: by graded broken stone or porous ceramic film material is closely knit is filled in the stake hole described in step 301, the roadbed that adopts afterwards conventional subgrade compaction method to be filled with graded broken stone to inside carries out compaction treatment again, make described roadbed and the graded broken stone being filled in described stake hole form an integral body, obtain the pile body (4) of having constructed;

Step 304, repeatedly repeating step 301 is to step 303, until complete the work progress of a plurality of described pvc pipe formula pile bodies;

When monolithic pvc pipe that pvc pipe one (7) and pvc pipe two (9) are integrated for processing and fabricating, after described monolithic pvc pipe being pressed in described stake hole, just synchronously complete the installation process of pvc pipe one (7) and pvc pipe two (9);

Step 4, Asphalt treated permeable base construction: according to the construction method of conventional Asphalt treated permeable base, on the roadbed of having constructed, lay one deck Asphalt treated permeable base (2) in step 3;

Step 5, surface course construction: according to the construction method of conventional surface course, the described surface course of the upper laying of the Asphalt treated permeable base of having constructed in step 4 (2).

2. according to urban road water permeability cement concrete pavement structure claimed in claim 1, it is characterized in that: the upper surface of described roadbed is mated formation the waterproof type geotextiles of one deck (10).

3. according to the urban road water permeability cement concrete pavement structure described in claim 1 or 2, it is characterized in that: described roadbed comprises the undisturbed soil roadbed (1) after smooth compaction treatment and the cement-soil of mating formation on described undisturbed soil roadbed (1) layer (11) or the rendzinas layer of mating formation of mating formation.

4. according to urban road water permeability cement concrete pavement structure claimed in claim 3, it is characterized in that: described cement-soil mat formation layer (11) by cement-soil, mat formation and form, described cement-soil is for to mix and stir by cement paste and the soil body induration forming, and the wet density of described cement-soil is 1.83g/m ³～1.85g/m ³, in every cubic metre of described cement-soil, the consumption of cement is 345kg～350kg, the water/binder ratio of described cement paste is 0.8; The described rendzinas layer of mating formation is mated formation and is formed by rendzinas, and the ratio that described rendzinas is 11 ± 1 ︰ 100 ± 10 by lime and soil according to mass ratio evenly mixes.

5. according to the urban road water permeability cement concrete pavement structure described in claim 1 or 2, it is characterized in that: on the inside wall of described pvc pipe one (7) and pvc pipe two (9), be all lined with one deck permeable geotextiles (5).

6. according to urban road water permeability cement concrete pavement structure claimed in claim 3, it is characterized in that: the bed thickness of described surface course is 140mm～150mm, the bed thickness of Asphalt treated permeable base (2) is 150mm～200mm; The bed thickness of described lower surface layer (3-1) is 100mm ± 10mm, and the bed thickness of upper layer (3-2) is 40mm～50mm; Described cement-soil the mat formation bed thickness of layer of layer (11) or described rendzinas of mating formation is 130mm～150mm.

7. according to the urban road water permeability cement concrete pavement structure described in claim 1 or 2, it is characterized in that: the barrette that cylinder pile or the cross dimension that described pvc pipe formula pile body is stake footpath Φ 20cm～Φ 30cm is (15cm ± 2cm) * (15cm ± 2cm); And when described pvc pipe formula pile body is cylinder pile, described pvc pipe one (7) and pvc pipe two (9) are round tube; And when described pvc pipe formula pile body is barrette, described pvc pipe one (7) and pvc pipe two (9) are box section; Described permeable hole (8) for from the inside to the outside gradually the angle of downward-sloping through hole and itself and vertical direction be 30 °～45 °.

8. according to urban road water permeability cement concrete pavement structure claimed in claim 1, it is characterized in that: the roadbed described in step 1 comprises the undisturbed soil roadbed (1) after smooth compaction treatment and the cement-soil of mating formation on described undisturbed soil roadbed (1) layer (11) or the rendzinas layer of mating formation of mating formation; While carrying out subgrade compaction in step 1, first adopt conventional subgrade compaction method, and according to the compaction requirement of design in advance, the undisturbed soil roadbed (1) after smooth is in advance carried out to compacting; Afterwards, lay cement soil or rendzinas of undisturbed soil roadbed (1) after compacting again, and adopt conventional subgrade compaction method, and the compaction requirement according to design in advance carries out compacting again to spread cement-soil or rendzinas, and corresponding cement-soil the mat formation pavement process of layer of layer (11) or rendzinas of mating formation that completes, obtain the roadbed of construction molding.

9. according to urban road water permeability cement concrete pavement structure claimed in claim 1, it is characterized in that: before carrying out the construction of water permeability pile body in step 3, also need on described roadbed, lay one deck and mat formation and have the waterproof type geotextiles of one deck (10), the upper correspondence of described waterproof type geotextiles (10) has a plurality of through holes that pass for a plurality of described water permeability pile bodies; Roadbed work area degree of depth lower limit Za described in step 2 is for to determine the determined lower limit Za of method according to conventional roadbed work area degree of depth lower limit Za, and when roadbed work area degree of depth lower limit Za is determined, according to formula determine, in formula, K is coefficient and K=0.5, and P is that a side wheel axle load Qie Qi unit is KN, and n is coefficient and n=5～10, and γ is that native severe Qie Qi unit is kN/m ³.