SG181210A1 - Reusable paving slab for temporary road andmethod for paving temporary road with the same - Google Patents
Reusable paving slab for temporary road andmethod for paving temporary road with the same Download PDFInfo
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- SG181210A1 SG181210A1 SG2011059482A SG2011059482A SG181210A1 SG 181210 A1 SG181210 A1 SG 181210A1 SG 2011059482 A SG2011059482 A SG 2011059482A SG 2011059482 A SG2011059482 A SG 2011059482A SG 181210 A1 SG181210 A1 SG 181210A1
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- panel
- rectangular
- paving
- paving slab
- reusable
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- 230000002787 reinforcement Effects 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims description 24
- 239000004576 sand Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 239000011150 reinforced concrete Substances 0.000 description 52
- 239000004568 cement Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- Road Paving Structures (AREA)
Abstract
REUSABLE PAVING SLAB FOR TEMPORARY ROAD AND METHOD FOR PAVING TEMPORARY ROAD WITH THE SAMEAbstractThe present invention relates to a reusable paving slab for temporary road and a method for paving the temporary road with the paving slab. The reusable paving slab for temporary road comprises a modularized rectangle RC panel, which containstherein a reinforcement mat (13) consisting of a plurality of longitudinally extending and laterally extending steel bars linked with each other. The rectangular RC panel is provided with a plurality of grooves (11), which are evenly distributed adjacent to edges of the rectangular RC panel in the upper surface of the rectangular RC panel, and a hook (12) arranged in each of the grooves in a hidden manner, the hooks (12)being anchored to the reinforcement mat and the top thereof being slightly lower than the upper surface of the rectangular RC panel (1). The paving slab of the invention can match the standard road in respect of the size and the shape. Hooks in the paving slab can be used for hoisting and moving the paving slab when paving the temporary road The invention is easy to apply, and the paving slab is reusable, safe andenvironment friendly.(Fig. 01)
Description
Reusable Paving Slab for Temporary Road and
Method for Paving Temporary Road with the Same
The invention relates to the field of construction engineering, more specifically to a reusable paving slab for temporary road and a method for paving the temporary road with the paving slab. The invention can be widely applied in a variety of construction works, civil works and road traffic engineering for rapid formation of large-area solid grounds or simple roads.
During construction or other engineering works, it is unavoidable to build or rebuild temporary road at or around the construction site. There are two ways to build the temporary road. The first method is to level off and compact the ground simply to build a simple type of muddy road. With this method, the dust will blow on the construction site, which will pollute the surrounding areas. The other method is to make a temporary road by laying cement pavement so that people or vehicles can travel on it; after completion of such construction work, the temporary road has to be removed. Therefore, the temporary road would have to be dug up and removed, the process of which will unavoidably generate heavy dust and noise pollution. Generally speaking, the temporary road varies with different construction stages. It has to be built and removed repeatedly, which not only wastes time and energy, but terribly wastes the cement, increases the construction cost and pollutes the environment. It does not comply with current demands for building a conservation-minded society and promoting environmental protection.
The invention aims to provide a reusable paving slab for temporary road and a method for paving the temporary road with the paving slab. The paving slab can be used for paving the temporary road and is reusable. It can be easily assembled, disassembled, lifted and moved, and is environment friendly. It can solve many problems, such as the tedious procedures of paving the solid cement ground, resource waste and cost increase.
In order to solve the above technical problems, the invention provides a reusable paving slab for temporary road for rapid formation of solid grounds or simple roads on a large-area construction site, comprising a modularized rectangular reinforced concrete (RC) panel, which contains therein a reinforcement mat consisting of a plurality of longitudinally extending and laterally extending steel bars linked with each other, wherein the rectangular RC panel is provided with a plurality of grooves, which are evenly distributed adjacent to edges of the rectangular RC panel in the upper surface of the rectangular RC panel, and a hook arranged in each of the grooves in a hidden manner, the hooks being anchored to the reinforcement mat and the top thereof being slightly lower than the upper surface of the rectangular RC panel.
The reusable paving slab according to the invention further includes a sector-shaped
RC panel for being paved at a bend of the road, the radius of which corresponds to the width of the standard road, wherein the sector-shaped RC panel contains therein a reinforcement mat consisting of a plurality of longitudinally extending and laterally extending steel bars linked with each other, and wherein the sector-shaped RC panel is provided with a plurality of grooves evenly distributed adjacent to edges of the sector-shaped RC panel in the upper surface of the sector-shaped RC panel, and a hook arranged in each of the grooves in a hidden manner, the hooks being anchored to the reinforcement mat and the top thereof being slightly lower than the upper surface of the sector-shaped RC panel.
The modularized rectangular RC panel has a length of 3m, a width of 2.4m and a thickness of 175mm or 100mm. Four hooks are symmetrically arranged near four corners of the rectangular RC panel.
The rectangular RC panel includes two layers, i.e., an upper layer and a lower layer, of reinforcement mats linked to each other, and the four hooks near the four corners are anchored to the upper and the lower layers of the reinforcement mats respectively.
Both of the rectangular RC panel and the sector-shaped RC panel are used at the bend of the temporary road, and the gap between the two RC panels is filled and leveled up with cast-in-situ concrete.
The surface of the rectangular RC panel or the sector-shaped RC panel is rough, and the four sides of the surface are all chamfered. _D-
The steel bars in the reinforcement mat of the rectangular RC panel and the sector-shaped RC panel are @10 ribbed steel bars and are spaced apart from each other by 300mm both longitudinally and laterally, and wherein the four hooks are 316
Zn-plated ribbed steel bars, and the top of the hooks is spaced away from the upper surface of the RC panels by no less than 10cm.
The invention further provides a construction method for paving temporary road with the above-mentioned reusable paving slab, comprising the following steps:
Step A, leveling out and compacting the foundation, laying down a layer of fine sand thereon, and setting up a drainage-facilitating cross slope according to the real landscape;
Step B, hooking the four hooks in the modularized rectangular paving slab by means of a four-jaw chain, hoisting the paving slab, and adjusting the lowering location thereof so as to locate it on the surface of the ground with fine sand;
Step C, hoisting another modularized rectangular paving slab, and adjusting the lowering position thereof so as to locate it in a position adjacent to the previous paving slab; and
Step D, repeating Step C to locate a next rectangular paving slab.
The construction method further comprises the following steps for pavement at a bend of the road: Step E, paving the sector-shaped paving slab followed by the rectangular paving slab at the bend of the road; and Step F, filling the gap between the two adjacent paving slabs and leveling up it with cast-in-situ concrete layer.
In Step A, after leveling out and compacting the foundation, a layer of fine sand with a thickness of 30mm is la down on the foundation.
The invention has the following technical advantages: it is clean and pollution free; it will not produce waste from the construction process; it never occupies the construction site; it is reusable and saves resources. Due to use of modular and standard design, the paving slab matches the standard road in respect of size and shape. Prefabricated paving slab can be assembled, adjusted and varied at will so as to meet requirements at different construction stages. At the early stage of the work, a simple road above the earth can be made rapidly so as to enable construction vehicles to enter into and move around the site. When the ground surface work and the underground work are undergoing, the scope of the solid ground can be changed at will. After the construction is completed, the prefabricated paving slabs can be moved to other construction sites for reuse, thus meeting the requirement for environmental protection. With the hooks arranged in grooves in a hidden manner, the prefabricated paving slab can be hoisted conveniently. The intensity of labor is low, assembly is fast and the technology is simple.
Fig. 1 shows the reusable paving slab for temporary road according to the invention.
Fig. 2 shows the horizontal sectional view of the paving slab of Fig. 1.
Fig. 3 shows the vertical sectional view of the paving slab of Fig. 1.
Fig. 4a shows the horizontal sectional view of the hook arranged in the groove according an embodiment of the invention.
Fig. 4b shows the vertical sectional view of the hook arranged in the groove according an embodiment of the invention.
Fig. 5 shows the groove located adjacent to edges of the RC panel according an embodiment of the invention.
Fig. 6 shows the construction method of paving the road bend with the reusable paving slab of temporary road according an embodiment of the invention.
Fig. 7 shows the relationship among the RC panel, fine sand and foundation when paving the road bend with the reusable paving slab of temporary road according an embodiment of the invention.
In the following the invention will be discussed in details with reference to the attached drawings and embodiments so that the objective, technical solution and advantages of the invention are more distinct. It should be understood that the particular embodiments as set forth herewith are intended to be illustrative only, not limiting the scope of the invention in any way.
As shown in Figs. 1 and 2, the reusable paving slab for temporary road according to the invention comprises a modularized rectangular RC panel 1. The rectangular RC panel 1 has a rough surface, and has a size and a shape corresponding to those of the standard road. The rectangular RC panel 1 contains a reinforcement mat 13 therein, which is made up of a plurality of longitudinally extending and laterally extending steel bars that are linked with each other. The reinforcement mat 13 is pre-buried 5S within the concrete of the RC panel 1. The grade of the concrete is C35, so that the reusable paving slab for temporary road according to the invention can be used for paving the temporary road where trucks can pass safely.
The size of the rectangular RC pane 1 can be designed as needed. In an embodiment of the invention, the rectangular RC panel 1 has a length of 2m, a width of 2.4m, and a thickness of 175mm or 100mm. All of four edges of the RC pane 1 are chamfered.
The 175mm thick rectangular RC panel 1 can be used for paving the road for heavy trucks, while the 100mm thick rectangular RC panel 1 can be used for paving the solid road, such as the passenger lane or the stock aisle.
As shown in Fig. 1, in order to hoist and move the paving slab to the destination site for pavement easily, the rectangular RC panel 1 is provided with several grooves 11 evenly distributed near edges thereof in the upper surface of the rectangular RC panel 1. In each of the grooves 11, a hook 12 anchored to the reinforcement mat 13 is arranged therein in a hidden manner. During pavement of the temporary road, the rectangular RC panel 1 can be easily hoisted by means of a four-claw chain 5, and thus can be moved to the construction site for paving the temporary road. The top of the hook 12 is slightly lower than the upper surface of the rectangular RC panel 1, so that trucks or passengers can travel safely on the temporary road formed according to the invention without colliding with the hooks.
Referring to Figs. 1 and 2 again, as a preferred embodiment of the invention, four grooves 11 are arranged in a symmetrical manner near four corners of the rectangular
RC panel 1. Each groove 11 has a hook 12 arranged therein, which is anchored to the reinforcement mat 13. That is, there are four hooks in the rectangular RC panel 1. The top of the hook 12 is no less than 10cm away from the upper surface of the RC panel 1. As shown in Fig. 3, the rectangular RC panel 1 has two layers, i.e., an upper layer and a lower layer, of reinforcement mats 13 linked to each other. The reinforcement mat 13 is made up of a plurality of longitudinally extending and laterally extending steel bars that are linked to each other. The steel bars, in an example being #10 ribbed steel bars, are spaced apart from each other by 300mm both longitudinally and laterally. As shown in Fig. 5, the groove 11 is wide at the top and narrow at the bottom, so that the four-claw chain 5 can extend into the groove 11 and then catch on the hooks. Then, the paving slab can be hoisted and moved to the place where the temporary road is required to be built.
As shown in Fig. 6, the reusable paving slab for the temporary road according to the 5S invention further comprises a sector-shaped RC panel 2 used for paving the bend of the road. The surface of the sector-shaped RC panel 2 is rough, and the radius thereof corresponds to the width of the standard road. All of four edges of the sector-shaped
RC panel 2 are chamfered. The curvature of the sector-shaped RC panel 2 can be designed as needed.
The sector-shaped RC panel 2 is provided therein with a reinforcement mat, which is made up of a plurality of longitudinally extending and laterally extending steel bars that are linked to each other. The reinforcing steel bars are (310 ribbed steel bars, and are spaced from each other by 300mm both longitudinally and laterally.
In order to hoist and move the sector-shaped RC panel 2 easily, the sector-shaped RC panel 2 is provided with several grooves (not shown) evenly distributed near edges thereof. In each of the grooves 11, a hook 12 anchored to the reinforcement mat is arranged therein in a hidden manner. The top of the hook is slightly lower than, e.g., at least 10 cm away from, the upper surface of the sector-shaped RC panel 2, so that trucks or passengers can travel safely on the temporary road formed according to the invention without colliding the hooks. As a preferred embodiment, the sector-shaped
RC panel 2 is provided with four grooves located adjacent to the edges thereof, one hook being arranged in each groove. Therefore, there are four hooks 12 in total, which can be of B16 Zn-plated ribbed steel bars.
The design of the reusable paving slab for temporary road according to the invention is modularized and standardized. The paving slab matches the standard road in respect of size and shape. Moreover, the paving slab comprises the rectangular and the sector-shaped RC panels, and a reinforcement mat comprising many longitudinally and laterally extending steel bars linked to each other. Therefore, by assembling, adjusting and tiling the paving slab of the invention, a temporary road can be formed rapidly and both pedestrians and trucks can travel on it.
In addition, when forming temporary road according to the invention, no traditional method such as hardening the cement is applied. Rather, the four-jaw chain 5 catches on the hooks 12 in the paving slab and then the paving slab can be moved to the required area. When it is necessary to remove the temporary road, the paving slab of the invention can be carried away for reuse. Therefore, the invention not only solves such problems as the tedious procedures of laying the solid cement ground, resource waste and cost increase, but also realizes reutilization of the paving slab, environmental economy and resources conservation.
The invention further discloses a construction method for paving temporary road with the above-mentioned reusable paving slabs, comprising the following steps:
Step A: leveling out and compacting the foundation 3, laying down a layer of fine sand 4 and setting up a drainage-facilitating cross slope according to the real landscape, the gradient of the cross slope preferably being 1%;
Step B: hooking the four hooks on the modularized rectangular paving slab of the invention by a four-jaw chain 5, hoisting the paving slab, and adjusting the lowering location thereof so as to locate it on the surface of the ground with fine sand 4;
Step C: hoisting another modularized rectangular paving slab, and adjusting the lowering position thereof so as to locate it in a position adjacent to the previous paving slab; and
Step D: repeating Step C to locate a next rectangular paving slab in position.
With putting the modularized rectangular paving slabs one after another on a straight road through Step A to Step D, a straight and simple temporary road can be formed.
When there is a bend in the road, the sector-shaped paving slab (as shown in Fig. 6) is used. Detailed steps are as follows:
Step E: Paving the sector-shaped paving slab followed by the rectangular paving slab at the road bend; and
Step I: Filling the gap between the two adjacent paving slabs and leveling up it with cast-in-situ concrete layer.
In order to ensure the road paved being standard and safe, it is preferred to lay down a 30mm thick layer of fine sand 4 after leveling out and compacting the foundation 3 in
Step A.
Fig. 7 shows the relationship among the paving slab, fine sand and the foundation when paving the temporary road with the reusable paving slab. After completing the pavement of the road, the temporary road may have one or two lanes, each being 3m wide.
In summary, when the reusable paving slab according to the invention is used for paving temporary road, it can be easily hoisted and moved, causing a simple and environment-friendly construction. A simple temporary road will be formed simply by joining the paving slabs one by one. When it is necessary to remove the temporary road, it is just required to use the four-jaw chain to catch on the hooks; in this case, the paving slab of the invention can be delivered to other required areas. Therefore, the paving slab according to the invention can be reusable and will not pollute the environment.
While the invention has been described in conjunction with the preferred embodiments outlined above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Various changes may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (10)
1. A reusable paving slab for temporary road for rapid formation of solid grounds or simple roads on a large-area construction site, comprising a modularized rectangular RC panel (1), which contains therein a reinforcement mat (13) consisting of a plurality of longitudinally extending and laterally extending steel bars linked with each other, wherein the rectangular RC panel (1) is provided with a plurality of grooves (11), which are evenly distributed adjacent to edges of the rectangular RC panel in the upper surface of the rectangular RC panel, and a hook (12) arranged in each of the grooves in a hidden manner, the hooks (12) being anchored to the reinforcement mat and the top thereof being slightly lower than the upper surface of the rectangular RC panel (1).
2. The reusable paving slab according to claim 1, wherein further including a sector-shaped RC panel (2) for being paved at a bend of the road, the radius of which corresponds to the width of standard road, wherein the sector-shaped RC panel (2) contains therein a reinforcement mat consisting of a plurality of longitudinally extending and laterally extending steel bars linked with each other, and wherein the sector-shaped RC panel (2) is provided with a plurality of grooves (11) evenly distributed adjacent to edges of the sector-shaped RC panel in the upper surface of the sector-shaped RC panel, and a hook (12) arranged in each of the grooves in a hidden manner, the hooks (12) being anchored to the reinforcement mat and the top thereof being slightly lower than the upper surface of the sector-shaped RC panel (2).
3. The reusable paving slab according to claim 1, wherein the modularized rectangular RC panel has a length of 3m, a width of 2.4m and a thickness of 175mm or 100mm, and wherein four hooks (12) are symmetrically arranged near the four corners of the rectangular RC panel.
4. The reusable paving slab according to claim 3, wherein the rectangular RC panel (1) includes two layers, i.e., an upper layer and a lower layer, of reinforcement mats (13) linked to each other, and the four hooks (12) near the four corners are anchored to the upper and the lower layers of the reinforcement mats respectively.
5. The reusable paving slab according to claim 2, wherein both of the rectangular RC panel (1) and the sector-shaped RC panel (2) are used at the bend of the temporary road, and the gap between the two RC panels (1, 2) is filled and leveled up with cast-in-situ concrete.
6. The reusable paving slab according to claim 5, wherein the surface of the rectangular RC panel (1) or the sector-shaped RC panel (2) is rough, and the four sides of the surface are all chamfered.
7. The reusable paving slab according to claim 5, wherein the steel bars in the reinforcement mats (13) of the rectangular RC panel (1) and the sector-shaped RC panel (2) are P10 ribbed steel bars and are spaced apart from each other by 300mm both longitudinally and laterally, and wherein the four hooks (12) are 16 Zn-plated ribbed steel bars, and the top of the hooks (12) is spaced away from the upper surface of the RC panels by no less than 10cm.
8. A construction method for paving temporary road with the reusable paving slab according to any one of claims 1 to 7, comprising the following steps: Step A: leveling out and compacting the foundation, laying down a layer of fine sand thereon, and setting up a drainage-facilitating cross slope based on the real landscape; Step B: hooking the four hooks in the modularized rectangular paving slab by means of a four-jaw chain, hoisting the paving slab, and adjusting the lowering location thereof so as to locate it on the surface of the ground with fine sand; Step C: hoisting another modularized rectangular paving slab, and adjusting the lowering position thereof so as to locate it in a position adjacent to the previous paving slab; and Step D: repeating Step C to locate a next rectangular paving slab.
9. The construction method according to claim 8, where further comprising the following steps for pavement at a bend of the road: Step E: paving the sector-shaped paving slab followed by the rectangular paving slab at the bend of the road; and Step F: filling the gap between the two adjacent paving slabs and leveling up it with cast-in-situ concrete layer.
10. The construction method according to claim 8 or 9, wherein in Step A after leveling out and compacting the foundation (3), laying down a layer of fine sand (4) with a thickness of 30mm on the foundation (3).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010575324XA CN102242537A (en) | 2010-11-29 | 2010-11-29 | Cyclically used temporary pavement platen, and method for paving temporary pavement therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SG181210A1 true SG181210A1 (en) | 2012-06-28 |
Family
ID=44960764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SG2011059482A SG181210A1 (en) | 2010-11-29 | 2011-08-18 | Reusable paving slab for temporary road andmethod for paving temporary road with the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102242537A (en) |
| SG (1) | SG181210A1 (en) |
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| CN102979022A (en) * | 2012-06-15 | 2013-03-20 | 有利华建筑预制件有限公司 | Semi-prefabricated structure road and paving method thereof |
| CN102877391A (en) * | 2012-09-28 | 2013-01-16 | 中国建筑第六工程局有限公司 | Temporary channel anti-skidding road surface for foundation pit excavation and construction method of temporary channel anti-skidding road surface |
| CN103334362B (en) * | 2013-06-26 | 2015-10-28 | 中国建筑股份有限公司 | Prefabricated steel concrete wear resistant road surface plate and pavement construction method |
| CN103334356B (en) * | 2013-06-26 | 2015-09-30 | 中国建筑股份有限公司 | The dark beam slab pavement system of bridge-type prefabricated reinforced concrete and construction method thereof |
| CN103866670B (en) * | 2014-02-28 | 2017-01-11 | 中国建筑股份有限公司 | Fabricated vehicle bearing pavement and construction method thereof |
| CN105986539A (en) * | 2015-02-10 | 2016-10-05 | 中建四局安装工程有限公司 | Assembled temporary pavement |
| CN105239482A (en) * | 2015-10-23 | 2016-01-13 | 永升建设集团有限公司 | Single-bar, single-mesh and anti-crack type precast concrete pavement slab convenient to carry, disassemble and assemble and using method of precast concrete pavement slab |
| CN105563640A (en) * | 2015-12-30 | 2016-05-11 | 江海燕 | Manufacturing process for environment-friendly construction modularization tool type temporary road plate block |
| CN105803882A (en) * | 2016-05-04 | 2016-07-27 | 北京城建集团有限责任公司 | Steel structured pavement member, steel structured pavement with same and construction method |
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| CN108222529A (en) * | 2016-12-14 | 2018-06-29 | 余小红 | Protect the building engineering method of body structure surface |
| CN106677476A (en) * | 2017-01-03 | 2017-05-17 | 南丹县住房和城乡建设局 | Movable type ground rebar concrete plate block |
| CN107419639A (en) * | 2017-05-17 | 2017-12-01 | 中建五局土木工程有限公司 | Device of shifting block type pavement structure and road surface |
| CN107034757B (en) * | 2017-06-02 | 2019-10-22 | 中国航发南方工业有限公司 | The method of construction of town road assembled rigid unit and precast assembly road |
| CN107605924A (en) * | 2017-09-08 | 2018-01-19 | 中铁第四勘察设计院集团有限公司 | A kind of Suspension hook structure and its construction method of later stage supplement |
| CN108469350A (en) * | 2018-06-29 | 2018-08-31 | 重庆交通大学 | adjustable tunnel model test device |
| CN109468905B (en) * | 2018-10-26 | 2020-12-15 | 博兴兴博城建投资集团有限公司 | Temporary paving emergency road based on road construction |
| CN110258230B (en) * | 2019-07-30 | 2024-03-08 | 沈阳理工大学 | Prefabricated road slab and laying method thereof |
| CN110409244B (en) * | 2019-08-23 | 2021-06-25 | 中国建筑第七工程局有限公司 | Composite bearing prefabricated road slab and prefabricated pavement construction method |
| CN112342856B (en) * | 2020-10-27 | 2022-04-15 | 东南大学 | Prefabricated reinforced concrete hollow slab pavement for permafrost region and preparation method thereof |
| CN113550194A (en) * | 2021-06-08 | 2021-10-26 | 中国二十二冶集团有限公司 | Construction method for recycling concrete reinforcing bars of construction hardened ground |
| CN113322738A (en) * | 2021-06-18 | 2021-08-31 | 中铁建设集团有限公司 | Prefabricated road panel connecting structure and mounting method based on groove bent bolt connection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201024366Y (en) * | 2006-06-02 | 2008-02-20 | 马俊 | Reinforced concrete pavement member |
| CN100570060C (en) * | 2007-01-26 | 2009-12-16 | 张玉荣 | Motor vehicle racing raceway and job practices thereof |
| CN201416135Y (en) * | 2009-05-04 | 2010-03-03 | 李嘉树 | Dedicated reinforced concrete block for fast urban pavement paving |
-
2010
- 2010-11-29 CN CN201010575324XA patent/CN102242537A/en active Pending
-
2011
- 2011-08-18 SG SG2011059482A patent/SG181210A1/en unknown
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| Publication number | Publication date |
|---|---|
| CN102242537A (en) | 2011-11-16 |
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