CN1493745A - Method of preventing to produce crack on road surface and product - Google Patents
Method of preventing to produce crack on road surface and product Download PDFInfo
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- CN1493745A CN1493745A CNA021350388A CN02135038A CN1493745A CN 1493745 A CN1493745 A CN 1493745A CN A021350388 A CNA021350388 A CN A021350388A CN 02135038 A CN02135038 A CN 02135038A CN 1493745 A CN1493745 A CN 1493745A
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Abstract
A method and product for prevent the road pavement, from being cracked feature that a 3D network is arranged at the seam position in structure layer and the structure layer material is spread on said 3D network to bury said 3D network in said structure layer material. Its advantages are low cost and high effect.
Description
One) technical field
The present invention relates to prevent the method and the product scope of highway construction disease, especially prevent to produce in the road surface method and the product in crack.
Two) background technology
In the pavement of road engineering, especially in the flexible pavement, some cracks of ubiquity, crack on the normally newly-built sub-surface in this class crack, or the seam of road widening when reconstruction junction, new and old road, or the seam on the old cement pavement or crack reflection are to overlaying due to the surface layer, or the temperature of surface material itself or load crack, the existence in these cracks, make rainwater more easily enter road structure inside, under the effect of traffic load, cause the premature failure on road surface by the crack, therefore, in the construction of pavement engineering, generally to adopt some method that prevents the crack and measures at present, at present, normal method that prevents the crack and the product that adopts is: completely spread one deck tensile material bed of material under the new surface layer of laying, so that the stress at crack on the sub-surface or place, the crack on the old pavement is weakened on the tensile material bed of material or eliminates; Tensile material bed of material product commonly used is planar grid such as geo-grid etc., or planar cloth such as geotextiles.
The mechanism of action of these planar cloth or plane grid is: when occurring crack or surface layer itself under the surface layer and crack trend occurs, the tensile stress at crack place is on surface layer in the transmittance process, can be absorbed a part by plane grid or planar cloth, thereby can play the effect that reduces or delay the road surfaces crack.But there are following shortcomings in these measures: 1, anti-crack is limited in one's ability: because the stress state at place, crack is a very complicated stress field, tensile stress, shear stress, compressive stress have been comprised in the stress field, therefore tensile stress is only located one of main stress of stress field in the crack, planar cloth or plane grid also only are to have blocked upwards transmitting of part tensile stress, and it is powerless for shear stress, though this just existing road surface has overlayed the plane ribbing material, still how long reasons of cracks will not occur; 2, cause unnecessary plane grid waste: in some cases, the crack on road surface is very clocklike, when as usual overlaying bitumen layer on the cement road, reflection crack only concentrates on the seam crossing in length and breadth of old cement road, obviously need not lay plane grid at non-seam crossing, prior art then is to lay plane grid on All-terrain, and this must cause the waste of plane grid; 3, main is to cause the ground surface material huge waste: because plane grid is to preventing the limited in one's ability of crack, present road structure Thickness Design is not considered the effect of plane grid, prevent that the crack from still will realize by increasing road surface thickness basically, this makes prior art is that the road surface thickness that prevents the crack increases greatly and pays great cost.
Three) summary of the invention
One of purpose of the present invention is to provide a kind of method that prevents the crack, this method be adapted to crack place stress field, not only can absorb tensile stress and can also absorb shear stress, and material strengthened, method of the present invention is achieved like this: be used for highway construction, prevent the method in crack, it is characterized in that: the place, slit at deck is provided with the 3 D stereo grid, lays structural material again with on the 3 D stereo grid, and the 3 D stereo grid is embedded in the structural material.
Two of purpose of the present invention is to provide a kind of product that pavement engineering prevents the crack that is used for, and it is characterized in that: this product is the 3 D stereo grid.
A kind of form of two as the object of the invention, described 3 D stereo grid can be lattice chamber type, the band that constitutes this lattice chamber both can be the solid slab type, also can be grid, the band that constitutes the lattice chamber can also be not wide type, described not wide type both can be that width does not wait between band and the band, also can be that each band originally is change type in the indoor width of each little lattice.
As two the another kind of form of the object of the invention, described 3 D stereo grid can connect at interval discrete rigid support block by silk thread and constitute; Described rigid support block can be positioned at the place, crosspoint of silk thread in length and breadth; Described silk thread also can be plane grid, and rigid support block at interval Discrete Distribution and has the spill node of two-layer plane grid combination between at interval discrete rigid support block between two-layer plane grid; Between described two-grid a plane grid can also be arranged, rigid support block interval Discrete Distribution is in the checkerwork cell of this plane grid.
As two the another kind of form of the object of the invention, described 3 D stereo grid can be the grid bag, in the grid bag granular material is housed.
As two the another kind of form of the object of the invention, the periphery of described 3 D stereo grid can be combined with the plane grid.
Owing to adopt above-mentioned 3 D stereo grid at the pavement crack place, has following advantage: 1, make the crack on the road surface be able to and to eradicate, its mechanism is as follows: in extraneous load or temperature, do under the effect of factor such as wet, the place, slit stress can occur and concentrate, and present the complicated stress field state, this stress has comprised tensile stress, shear stress and compressive stress, and the appearance in crack is because the result of Stress Transfer.After above-mentioned 3 D stereo grid being set at this place, slit, in the process that the various stress at place, slit upwards transmit, tensile stress can mainly be absorbed by the planar portions branch of 3 D stereo grid, shear stress can mainly be absorbed by the facade of 3 D stereo grid or inclined plane part branch, and making various stress major part in the process of upwards transmitting of place, slit stress field be absorbed and block at 3 D stereo grid place, the crack is unlikely to be reflected on the road surfaces thereby make.If after being provided with granular material such as rubble in the 3 D stereo grid, the ability that absorbs the crack can strengthen more; 2, save grid material: because the 3 D stereo grid can only be arranged on place, slit, road surface, thereby can save a large amount of grid materials, certainly, the 3 D stereo grid completely paves and also is fine; 3, save the top course material in a large number: owing to adopted the 3 D stereo grid, the crack is eradicated, thereby the attenuate top course overlays thickness greatly, and the thickness of top course can consider to prevent the requirement of reflection crack again, thereby can save a large amount of construction costs; 4, can strengthen the road surface non-deformability in addition: because after the 3 D stereo grid is arranged on crack place, the three-dimensional part of 3 D stereo grid can be kept out the horizontal slippage of ground surface material under the extraneous factor effect, strengthen the continuity of road structure interlayer, strengthen the ability of road surface structare layer opposing rut.
Be described further preventing the method and the product that produce the crack in the road surface of the present invention below in conjunction with the drawings and specific embodiments.
Four) description of drawings
Fig. 1 is a prior art plane ribbed lattice geo-grid schematic diagram;
Fig. 2 is provided with the cross sectional view of one deck plane grid in apertured road surface structare layer for prior art;
Fig. 3 prevents the cross sectional view of the method for pavement crack for the embodiment of the invention 1;
Fig. 4 prevents a kind of product perspective view of pavement crack for the embodiment of the invention 2;
Fig. 5 is the A-A schematic cross-section of Fig. 4;
Fig. 6 is the sectional view of grid type for the limit of the formation 3 D stereo grid of the embodiment of the invention 2;
Fig. 7 is that the formation 3 D stereo grid limit of the embodiment of the invention 2 is the stereoscopic grid schematic cross-section of wide shape not;
Fig. 8 is that the formation 3 D stereo grid limit of the embodiment of the invention 2 is the not schematic cross-section of wide shape of another form;
Fig. 9 is the perspective view of the embodiment of the invention 3;
Figure 10 is the stereochemical structure decomposing schematic representation of the embodiment of the invention 4;
Figure 11 is the B-B schematic cross-section of Figure 10;
Figure 12 is the stereochemical structure decomposing schematic representation of the embodiment of the invention 5;
Figure 13 is the C-C schematic cross-section of Figure 12;
Figure 14 is the perspective view of the embodiment of the invention 6;
Figure 15 is the D-D schematic cross-section of Figure 14;
Figure 16 is for loading onto the cross sectional view of rubble in the 3 D stereo grid of the embodiment of the invention 6;
Figure 17 is for loading onto the user mode cross sectional view of rubble in the 3 D stereo grid of the embodiment of the invention 6.
Five) specific embodiment
As Fig. 2, shown in Figure 3, prevent the contrast schematic diagram of the method for pavement crack for the embodiment of the invention 1, prior art is that full the laying put one deck plane grid 1 between crannied supercrust, this will cause very big waste, and effect is bad, when especially on old cement road, overlaying surface layer, waste big and weak effect especially; The inventive method is that 3 D stereo grid 2 is set on apertured supercrust, thereby the crack is eradicated, and road structure can consider reflection crack and be able to attenuate, has reduced construction costs.
As Fig. 4, shown in Figure 5, the three-dimensional lattice chamber with a plurality of lattice chamber 4 of the 3 D stereo grid of present embodiment 2 for being welded into by steel plate 3, steel plate 3 thick 1 millimeter, steel plate also is coated with plastic coating through antirust processing; The steel plate 3 of present embodiment 2 can also be replaced by steel wire grid 3, as shown in Figure 6; The steel plate 3 of present embodiment 2 can also become not wide type, and each the plate 3 own width W that promptly constitutes three-dimensional lattice chamber are identical, and palette 3 is different with adjacent plate 3 width W, as shown in Figure 7; Except width between plate as shown in Figure 7 and the plate is different, width W of each plate 3 itself can also change in each little lattice chamber 4 and (play the increase adhesion, reduce the material usage effect), and, the limit portion of three-dimensional lattice chamber can also connect planar grille 5, to be adapted to stressed transition gradually, as shown in Figure 8.This solid lattice chamber can be set directly in the road surface structare layer above the slit in use.
As shown in Figure 9, present embodiment 3 is the another form of 3 D stereo grid, and this 3 D stereo grid 2 connects rigid support block 6 by silk thread 7 and constitutes, and rigid support block 6 is arranged at the place, crosspoint of silk thread 7 in length and breadth.The rigid support block 6 of present embodiment is the cement concrete block, and silk thread 7 is made for glass fiber strand, and cement concrete block 6 is built the place, crosspoint in silk thread 7 in length and breadth.The silk thread 7 of present embodiment also can be plane grid, and rigid support block 6 also can be arranged in the checkerwork cell of plane grid.
As Figure 10, shown in Figure 11, present embodiment 4 is for being connected another form that at interval discrete rigid support block constitutes the 3 D stereo grid by silk thread, the 3 D stereo grid of present embodiment 4 is made of grid 7 and stone 6, grid 7 is two-layer up and down, stone 6 interval Discrete Distribution are on one deck plane grid 7, another layer plane grid 7 covers on the stone 6 of Discrete Distribution, and the two-layer plane grid 7 between stone 6 and stone 6 is equipped with knot 8, this knot 8 passes two-layer plane grid 7 colligations by nylon wire and firmly forms, in limit portion two-layer plane grid is sewed up connection, form stone 6 like this and support plane grid 7 and tied the 83 D stereo grids 2 that separate.The plane grid 7 of present embodiment is the glass fiber grid grid, during the 3 D stereo grid 2 of practical application present embodiment, this 3 D stereo grid 2 is imbedded in the granular material, and it is more remarkable to make the solid of grid and block strengthen effect.
As shown in Figure 12 and Figure 13, present embodiment 5 is substantially the same manner as Example 4, difference is to have set up one deck rigid planar grid 7 between two-layer plane grid 7, Discrete Distribution is in the checkerwork cell of this rigid planar graticule mesh 7 at interval for stone 6, and this rigid planar graticule mesh 7 is that a steel wire that is covered with PVC welds graticule mesh.Coat layer of glass fiber grid grid 7 outside steel wire graticule mesh 7 and stone 6, glass fiber grid grid 7 forms knot 8 between stone 6, and this knot 8 passes two-layer plane grid 7 colligations by nylon wire and formed.In limit portion two-layer plane grid is sewed up and to be connected, form each support blocks 6 like this and separated by the checkerwork cell of knot 8 and steel wire graticule mesh 7 and support the 3 D stereo grid 2 of two-layer plane grid 7 up and down.
Above 3 D stereo grid all can be arranged in the asphalt surface course above the slit, or be arranged in the macadam in use, or in other arbitrary structures layers, or in the roadbed; More than and the edge of following 3 D stereo grid also all can colligation or be welded to connect plane grid, to adapt to stressed transition.
As Figure 14, Figure 15, Figure 16, shown in Figure 17, the 3 D stereo grid of present embodiment 6 is a grid bag 2, grid bag 2 is for to be made by terylene, during actual the use, the rubble 9 of packing in the bag, port is lived in colligation, be arranged on the slit on road surface, re-lay surface layer, the grid bag that rubble is housed just is embedded in the surface layer on the slit, and what pack in the present embodiment bag certainly also can be means of particulate material such as asphalt macadam.
Claims (10)
1, be used for highway construction, prevent the method in crack, it is characterized in that: the place, slit at deck is provided with the 3 D stereo grid, lays structural material again with on the 3 D stereo grid, and stereoscopic grid is embedded in the structural material.
2, be used for the product that pavement engineering prevents the crack, it is characterized in that: this product is the 3 D stereo grid.
3, the product that prevents the crack according to claim 2 is characterized in that: described 3 D stereo grid is a lattice chamber type, and the band that constitutes this lattice chamber is a solid slab.
4, the product that prevents the crack according to claim 2 is characterized in that: described 3 D stereo grid is a lattice chamber type, and the band that constitutes this lattice chamber is a grid.
5, according to claim 3 or 4 described arbitrary products that prevent the crack, it is characterized in that: the lattice band of described formation lattice chamber is not wide shape.
6, the product that prevents the crack according to claim 2 is characterized in that: described 3 D stereo grid is that silk thread connects at interval discrete rigid support block formation.
7, the product that prevents the crack according to claim 6 is characterized in that: described rigid support block is positioned at the place, crosspoint of silk thread in length and breadth.
8, the product that prevents the crack according to claim 6, it is characterized in that: described silk thread is a plane grid, rigid support block at interval Discrete Distribution and has the matrix node between the discrete rigid support block in the interval of two-layer plane grid between two-layer plane grid.
9, the product that prevents the crack according to claim 8 is characterized in that: also have a plane grid between the described two-grid, rigid block movement interval Discrete Distribution is in the checkerwork cell of this plane grid.
10, the product that prevents the crack according to claim 2 is characterized in that: described 3 D stereo grid is the grid bag, in the grid bag granular material is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021350388A CN1493745A (en) | 2002-10-28 | 2002-10-28 | Method of preventing to produce crack on road surface and product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021350388A CN1493745A (en) | 2002-10-28 | 2002-10-28 | Method of preventing to produce crack on road surface and product |
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| Publication Number | Publication Date |
|---|---|
| CN1493745A true CN1493745A (en) | 2004-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA021350388A Pending CN1493745A (en) | 2002-10-28 | 2002-10-28 | Method of preventing to produce crack on road surface and product |
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| CN (1) | CN1493745A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358202A (en) * | 2014-10-22 | 2015-02-18 | 交通运输部公路科学研究所 | Pavement structure layer and paving method thereof |
| CN114960337A (en) * | 2022-05-25 | 2022-08-30 | 河北工业大学 | Three-dimensional net pad for repairing pavement pit slot |
-
2002
- 2002-10-28 CN CNA021350388A patent/CN1493745A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358202A (en) * | 2014-10-22 | 2015-02-18 | 交通运输部公路科学研究所 | Pavement structure layer and paving method thereof |
| CN114960337A (en) * | 2022-05-25 | 2022-08-30 | 河北工业大学 | Three-dimensional net pad for repairing pavement pit slot |
| CN114960337B (en) * | 2022-05-25 | 2023-05-26 | 河北工业大学 | Three-dimensional net pad for repairing pavement pit |
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