CN102587243B - Urban road water permeability cement concrete pavement structure and construction process thereof - Google Patents
Urban road water permeability cement concrete pavement structure and construction process thereof Download PDFInfo
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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
Technical field
The invention belongs to urban road pavement structure technical field of construction, especially relate to a kind of urban road water permeability cement concrete pavement structure.
Background technology
The earth's surface of modern city is constantly covered by the building construction of steel concrete and fluid-tight road surface, the road that portland cement concrete is mated formation brings great convenience to people's trip and the circulation of commodity, though improved production efficiency and quality of life, but compare with natural soil, Portland cement concrete pavement lacks the ability that absorbs heat and infiltration rainwater, has brought series of problems thereupon:
The rainwater that the first, can permeate the ground obviously reduces, and industrial production and the modern life are doubled and redoubled the extraction amount of underground water, cause groundwater table sharply to decline, water deficient in soil, anoxic, Rise of Geotemperature etc., thereby directly affected the health of urban vegetation, further aggravated arid, the water shortage problem in city.
The second, fluid-tight road surface is difficult to carry out the exchange of heat and humidity with air, easily produces " heat island effect ", makes urban inner excess Temperature, causes climatic deterioration;
While three, concentrating rainfall in the short time, because a large amount of rainwater can only enter river by underground drainage facility, greatly increased the weight of the burden of drainage, and the easy ponding of road, bring adverse effect to comfortableness and the safety of vehicles and pedestrians.
At present, macrovoid permeable concrete, as a kind of new environment-friendly type, ecotypic pavement material, receives people's concern day by day.But nowadays,, most domestic research is just pursued rainwater simply by road structure, in order not make subgrade strength decline, makes it before entering roadbed, discharge road integral body.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, and the urban road water permeability cement concrete pavement structure that a kind of reasonable in design, easy construction and result of use are good, have percolating water function is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of 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 forming and the surface course of mating formation on Asphalt treated permeable base; Described surface course is surface course one or by lower surface layer be paved on the surface course two that the upper layer on lower surface layer 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 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 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 that graded broken stone in pvc pipe or porous ceramic film material form, described pile body 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 and is positioned at directly over pvc pipe one and the equal identical pvc pipe two of structure and size; Described bottom pile body section is set in pvc pipe one, on the lateral wall of described pvc pipe one, have a plurality of permeable holes that are even laying, the structure of a plurality of permeable holes and size are all identical and be manhole, and the spacing between adjacent two described permeable holes is 10cm ± 2cm.
Above-mentioned urban road water permeability cement concrete pavement structure, is characterized in that: the upper surface of described roadbed is mated formation the waterproof type geotextiles of one deck.
Above-mentioned urban road water permeability cement concrete pavement structure, is characterized in that: described roadbed comprises undisturbed soil roadbed after smooth compaction treatment and the cement-soil of mating formation on described undisturbed soil roadbed layer or the rendzinas layer of mating formation of mating formation.
Above-mentioned urban road water permeability cement concrete pavement structure, is characterized in that: described cement-soil mat formation layer 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.
Above-mentioned urban road water permeability cement concrete pavement structure, is characterized in that: on the inside wall of described pvc pipe one and pvc pipe two, be all lined with one deck permeable geotextiles.
Above-mentioned urban road water permeability cement concrete pavement structure, is characterized in that: the bed thickness of described surface course is 140mm～150mm, and the bed thickness of Asphalt treated permeable base is 150mm～200mm; The bed thickness of described lower surface layer is 100mm ± 10mm, and the bed thickness of upper layer is 40mm～50mm; Described cement-soil mat formation layer or described rendzinas mat formation layer bed thickness be 130mm～150mm.
Above-mentioned urban road water permeability cement concrete pavement structure, 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 and pvc pipe two are round tube; And when described pvc pipe formula pile body is barrette, described pvc pipe one and pvc pipe two are box section; Described permeable hole for from the inside to the outside gradually the angle of downward-sloping through hole and itself and vertical direction be 30 °～45 °.
Meanwhile, the invention also discloses the urban road water permeability cement concrete pavement structure construction technology that a kind of processing step is simple, realization is convenient and speed of application is fast, construction effect is good, it is characterized in that this technique 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 that a plurality of permeable holes 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 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 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 and pvc pipe two 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 and pvc pipe two;
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 in step 3;
Step 5, surface course construction: according to the construction method of conventional surface course, on the Asphalt treated permeable base of having constructed, lay described surface course in step 4.
Above-mentioned technique, is characterized in that: the roadbed described in step 1 comprises undisturbed soil roadbed after smooth compaction treatment and the cement-soil of mating formation on described undisturbed soil roadbed layer 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 after smooth is in advance carried out to compacting; Afterwards, lay cement soil or rendzinas of undisturbed soil roadbed 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 or rendzinas of mating formation that completes, obtain the roadbed of construction molding.
Above-mentioned technique, 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, the corresponding a plurality of through holes that pass for a plurality of described water permeability pile bodies that have in described waterproof type geotextiles; 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.
The present invention compared with prior art has the following advantages:
1, Pavement Structure Design is reasonable, adopt water-permeable cement concrete as paving surface layer, Asphalt Stabilized Macadam is as sub-surface, roadbed internal bore fill in graded broken stone and form water permeability pile body in addition, thereby it is whole finally to have formed a brand-new road structure.
2, adopt permeable cement paving layer as top course, can make rainwater infiltrate rapidly basic unit and arrive roadbed, pass through, under the arrival point of holed hole, groundwater resources to be supplemented in time.Simultaneously, surface course easy construction, it can be 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, also can be formed by lower surface layer and the upper layer being paved on lower surface layer, wherein upper layer is mated formation and is formed by parameters of porous cement concrete pavement material, and lower surface layer is large space open gradation drainage type asphalt wearing layer.
3, adopt the inner boring roadbed that is provided with a plurality of water permeability pile bodies directly to communicate with underground, carry out a step and strengthen water permeability, the reasonable in design of while water permeability pile body, it is pvc pipe formula pile body; Pvc pipe formula pile body comprises the pvc pipe that is plugged in a hole and is filled in by closely knit the pile body that graded broken stone in pvc pipe or porous ceramic film material form, pile body is divided into top pile body section and bottom pile body section with roadbed work area degree of depth lower limit ZaWei circle of roadbed, and pvc pipe comprises pvc pipe one and is positioned at directly over pvc pipe one and the equal identical pvc pipe two of structure and size; Bottom pile body section is set in pvc pipe one, have a plurality of permeable holes that are even laying, and top pile body section is set in pvc pipe two on the lateral wall of pvc pipe one.
4, pavement structure of the present invention is without surface area water and reflecting at night, effectively improved vehicle, pedestrian's current comfortableness and safety.
5, result of use is good and have a percolating water function, due to the present invention adopt porous pavement surface layer; Asphalt Stabilized Crushed Stone Basement and boring roadbed are as brand-new road surface structare layer, make it directly to communicate with underground, can put aside more heat and moisture, greatly alleviated city " heat island effect ", and can effectively rainwater on road surface be penetrated into undergroundly, make it to reach the object of reduction underground water.
6, when concentrating rainfall, pavement structure of the present invention can alleviate the burden of drainage, prevents the generation of city waterlogging.
7, processing step is simple, realization is convenient and speed of application is fast, construction effect is good.During practice of construction, first carry out subgrade compaction, then in the roadbed of compacting, according to certain putting in order, hole and get eye, then intercept the pvc pipe consistent with the holed hole degree of depth, then according to the degree of depth of roadbed work area, on pvc pipe, hole, afterwards pvc pipe is pressed into holed hole inner, fills in graded broken stone, carry out compacting again; Carry out subsequently the construction of Asphalt treated permeable base and surface course.
8, construction quality is easy to guarantee, because the water that sees through surface course in work progress is before entering roadbed, in roadbed internal bore, get eye, afterwards with geotextiles sealing road bed and inside, the institute hole of holing, and graded broken stone is filled in to holed hole and carried out compacting, make holed hole form a good integral body with roadbed, the unlikely subgrade rating that makes because of boring declines, remitted its fury, fill in like this graded broken stone and again after compacting, subgrade strength can obtain certain raising on the contrary.
9, the scope of application is wider, is not only applicable to the road of light traffic, such as the sidewalk in city square, park etc.; And applicable to each line construction of urban traffic.
In sum, reasonable in design of the present invention, easy construction and result of use be good, have the ability that absorbs heat and infiltration rainwater, can effectively solve the multiple practical problem that existing Portland cement concrete pavement exists.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of water permeability cement concrete pavement structure that the present invention adopts.
Method flow block diagram when Fig. 2 constructs to water permeability cement concrete pavement structure for employing the present invention.
Fig. 3 is the structural representation that the present invention adopts monolithic pvc pipe.
Description of reference numerals:
1-undisturbed soil roadbed; 2-Asphalt treated permeable base; 3-1-lower surface layer;
3-2-upper layer; 4-pile body; 5-permeable geotextiles;
7-pvc pipe one; 8-permeable hole; 9-pvc pipe two;
10-waterproof type geotextiles; 11-cement-soil layer of mating formation.
The specific embodiment
A kind of urban road water permeability cement concrete pavement structure as shown in Figure 1, comprises 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 1 and is positioned at directly over pvc pipe 1 and the equal identical pvc pipe 29 of structure and size.Described bottom pile body section is set in pvc pipe 1, on the lateral wall of described pvc pipe 1, 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.
During practice of construction, construction method and raw material that the construction method of described Asphalt treated permeable base 2 adopts while constructing with raw materials and conventional Asphalt treated permeable base are all identical.
And the pile body 4 of described pvc pipe formula pile body pile shaft material be graded broken stone or porous ceramic film material.
Described graded broken stone is evenly mixed and forms by coarse aggregate and fine aggregate.Wherein, the groups of grains of coarse aggregate becomes in Table 1:
The particle of table 1 coarse aggregate forms table
The particle of above-mentioned fine aggregate forms and index of plasticity requires in Table 2
The particle of table 2 fine aggregate forms and index of plasticity requires table
The rupture strength >2.94Mpa of described porous ceramic film material, coefficient of permeability >0.03mm/s, friction factor >0.46.
During practice of construction, described pvc pipe formula pile body is that cylinder pile or the cross dimension of stake footpath Φ 20cm～Φ 30cm is the barrette of (15cm ± 2cm) * (15cm ± 2cm); And when described pvc pipe formula pile body is cylinder pile, described pvc pipe 1 and pvc pipe 29 are round tube; And when described pvc pipe formula pile body is barrette, described pvc pipe 1 and pvc pipe 29 are box section.In the present embodiment, 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 °.
In the present embodiment, described pvc pipe formula pile body is cylinder pile.During practice of construction, also can be set to barrette by described pvc pipe formula pile body.
In the present embodiment, the upper surface of described roadbed is mated formation the waterproof type geotextiles 10 of one deck.
On the inside wall of described pvc pipe 1 and pvc pipe 29, be all lined with one deck permeable geotextiles 5.In the present embodiment, described pvc pipe 1 and pvc pipe 29 processing and fabricatings are integrated.
In the present embodiment, described roadbed comprises undisturbed soil roadbed after smooth compaction treatment 1 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.That is to say, the top of a plurality of described water permeability pile bodies all with cement-soil mat formation layer 11 or rendzinas mat formation layer top mutually concordant.
In actual use procedure, the cement-soil of laying the mat formation effect of layer of layer 11 or rendzinas of mating formation is to prevent that the waterborne of roadbed inside from oozing.
The described cement-soil layer of mating formation 11 is mated formation and is formed by cement-soil, and 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.
In the present embodiment, cement mixing content in described cement paste (mass percent) is 19%.The optimum moisture content of described rendzinas (mass percent) is 20%.
During practice of construction, described cement-soil mat formation layer 11 or described rendzinas mat formation layer bed thickness be 130mm～150mm.
In the present embodiment, the bed thickness of described surface course is 140mm～150mm, and the bed thickness of Asphalt treated permeable base 2 is 150mm～200mm.
Construct in the gradation composition of described Asphalt treated permeable base 2, nominal maximum particle diameter is 25mm.The gradation composition of described Asphalt treated permeable base 2 is in Table 3:
Table 3: the gradation composition statistical form of Asphalt treated permeable base 2
The bed thickness of described lower surface layer 3-1 is 50mm ± 10mm, and the bed thickness of upper layer 3-2 is 90mm～100mm.During practice of construction, can according to specific needs, bed thickness of the bed thickness of the bed thickness of the bed thickness of described surface course, Asphalt treated permeable base 2, lower surface layer 3-1, upper layer 3-2 etc. be adjusted accordingly.In the present embodiment, the bed thickness of described upper layer 3-2 is 40mm, and the bed thickness of lower surface layer 3-1 is 100mm.
In the present embodiment, described upper layer 3-2 adopts OGFC-10, and porosity is 15%～20%; Described lower surface layer 3-1 adopts OGFC-16, and porosity is 15%～20%.
During practice of construction, the thickness of described permeable geotextiles 5 is that 2.2mm ± 0.2mm, specification are 150g/m
2～250g/m
2and its coefficient of permeability is 0.01mm/s.The thickness of described waterproof type geotextiles 10 is that 2.2mm ± 0.2mm and its specification are 100g/m
2～200g/m
2.
In the present embodiment, the thickness of described permeable geotextiles 5 is that 2.2mm, specification are 150g/m
2～250g/m
2and its coefficient of permeability is 0.01mm/s.The thickness of described waterproof type geotextiles 10 is that 2.2mm and its specification are 100g/m
2～200g/m
2.Wherein, waterproof type canvas cloth is also referred to as waterproof geotextiles.
In the present embodiment, serve as reasons lower surface layer 3-1 and be paved on the surface course two that upper layer 3-2 on lower surface layer 3-1 forms of described surface course.
Wherein, the water/binder ratio of upper layer 3-2 described parameters of porous cement concrete pavement material used be 0.32 and its 7 days compressive strength be 18Mpa～19Mpa.
During practice of construction, also even admixture has silica flour and forms compound in described parameters of porous cement concrete pavement material, and the percentage by weight that institute's admixture silica flour accounts for described compound is 6% ± 0.5%.Herein, the object of interpolation silica flour is that parameters of porous cement concrete pavement material is strengthened.
A kind of urban road water permeability cement concrete pavement structure construction technology as shown in Figure 2, 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.
In the present embodiment, the roadbed described in step 1 comprises undisturbed soil roadbed after smooth compaction treatment 1 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.
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.
During actual boring, can according to specific needs institute's drilling depth be adjusted accordingly, and drilling depth preferably can get into described roadbed bottom and reach water table.
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 1 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 1 and pvc pipe 29 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 1 and pvc pipe 29, step 301 and step 302 can once complete.
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, on the Asphalt treated permeable base 2 of having constructed, lay described surface course in step 4.
In the present embodiment, 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 10 of one deck, the corresponding a plurality of through holes that pass for a plurality of described water permeability pile bodies that have in described waterproof type geotextiles 10.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 (or unit weight) Qie Qi unit is kN/m
3.
In the present embodiment, a plurality of described permeable holes 8 are equilateral triangle and lay.
In the present embodiment, cross-sectional configuration and the size of described pvc pipe 1 and pvc pipe 29 are all identical, and the wall thickness of the two is 2mm～3mm.The aperture of described permeable hole 8 is Φ 3cm～Φ 4cm, and the spacing between adjacent two described permeable holes 8 is 10cm.Specifically add man-hour, can to the spacing between the aperture of described permeable hole 8, angle of inclination and adjacent two described permeable holes 8, adjust accordingly according to actual needs.
In the present embodiment, in conjunction with Fig. 3, described pvc pipe 1 and pvc pipe 29 processing and fabricatings are integrated.During practice of construction, the internal construction of described pvc pipe 1 and pvc pipe 29 and size all with the external structure of described pile body 4 and measure-alike, and the external structure of described pvc pipe 1 and pvc pipe 29 and size all with the internal construction in described stake hole and measure-alike.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
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.
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