CN114250661B - Prestressed reinforced stable fine-grained soil base layer and construction method and device thereof - Google Patents
Prestressed reinforced stable fine-grained soil base layer and construction method and device thereof Download PDFInfo
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- CN114250661B CN114250661B CN202111545717.0A CN202111545717A CN114250661B CN 114250661 B CN114250661 B CN 114250661B CN 202111545717 A CN202111545717 A CN 202111545717A CN 114250661 B CN114250661 B CN 114250661B
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- galvanized steel
- steel wire
- grained soil
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- prestress
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/02—Concrete base for bituminous paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a prestressed reinforced stable fine grained soil base layer and a construction method and a construction device thereof, wherein the prestressed reinforced stable fine grained soil base layer comprises a plurality of stable fine grained soil mixed material layers, a galvanized steel wire mesh and an inserting plate; the stable fine-grained soil mixture layer is paved by a mixture of cement, lime and fine-grained soil; a galvanized steel wire mesh is arranged between two adjacent stable fine soil mixed material layers; the galvanized steel wire mesh is applied with prestress; two groups of plugboards are respectively arranged at two sides of the stable fine-grained soil mixed material layer, and the two groups of plugboards are respectively connected with two sides of the galvanized steel wire gauze. The invention realizes the application of prestress to the continuous pavement structure layer, fully improves the strength and rigidity of the pavement structure layer, can effectively control the formation and extension of cracks, prolongs the service life of the pavement and reduces the cost of the pavement.
Description
Technical Field
The invention relates to the field of highway and urban road construction, in particular to a prestressed reinforced stable fine-grained soil base layer and a construction method and device thereof.
Background
Asphalt pavement using semi-rigid material as pavement base layer has the advantages of high strength, good plate body property, low cost, simple construction, low noise, comfortable running and the like, and has been widely used in road construction in China in recent years. However, due to the complexity of road surface load, uncertainty in the construction process, inherent characteristics of semi-rigid base materials and the like, the semi-rigid base asphalt road surface has more diseases, particularly when inorganic binder is adopted to stabilize or improve fine soil as the semi-rigid base, the semi-rigid base asphalt road surface is easy to crack due to shrinkage and drying, and the crack can reflect, so that the asphalt road surface is developed, rainwater is infiltrated downwards and the road surface is pumped, the normal exertion of the road function is seriously influenced, the service life of the road surface is shortened, and the maintenance result of the road is increased. Therefore, how to improve the crack resistance of the pavement and prolong the service life of the pavement is a problem which needs to be solved by engineering personnel in the field at present.
Therefore, the invention provides the pavement prestress reinforcement structure for preventing the cracking phenomenon of the semi-rigid base layer, which can change the stress state of the pavement structure layer, effectively improve the integrity of the pavement, control the generation and development of cracks, ensure the strength of the pavement and realize the sustainable development of the pavement structure.
Disclosure of Invention
In order to solve the problems, the invention provides the prestressed reinforced stable fine-grained soil base layer which has strong crack resistance, good integrity, long service life and good ecological environment effect, and provides a construction method and a construction device for the prestressed reinforced stable fine-grained soil base layer, wherein the construction method is convenient to construct and controllable in quality.
The technical scheme for solving the problems is as follows: the prestressed reinforced stable fine-grained soil base layer is characterized by comprising a plurality of stable fine-grained soil mixed material layers, galvanized steel wire meshes and plugboards; the stable fine-grained soil mixture layer is paved by a mixture of cement, lime and fine-grained soil; a galvanized steel wire mesh is arranged between two adjacent stable fine soil mixed material layers; the galvanized steel wire mesh is applied with prestress; two groups of plugboards are respectively arranged at two sides of the stable fine-grained soil mixed material layer, and the two groups of plugboards are respectively connected with two sides of the galvanized steel wire.
In the prestressed reinforced stable fine-grained soil base layer, the prestressed galvanized steel wire mesh is a rectangular mesh woven by galvanized steel wires, and the intersecting nodes of the galvanized steel wires are connected through retaining rings.
In the prestressed reinforced stable fine-grained soil base layer, the diameter of the galvanized steel wire is 2-6 mm.
The construction device for the prestressed reinforcement stable fine-grained soil base layer comprises two groups of steel templates, wherein the two groups of steel templates are arranged in parallel; a plurality of long straight holes are formed in the steel template along the axis square, and the long straight holes are vertically arranged in the length direction; each long straight hole is internally provided with a prestress drag hook respectively, the prestress drag hook comprises a screw rod and drag hooks, the drag hooks are positioned between two groups of steel templates, the screw rod is inserted into the long straight holes, the screw rod is provided with nuts, and the nuts are positioned outside the steel templates.
The construction method for the prestressed reinforced stable fine-grained soil base layer comprises the following construction steps:
step 1: arranging a group of steel templates on two sides of the roadbed or the cushion layer which is qualified in inspection in an end-to-end mode along the length direction of the route, wherein the steel templates are fixed through a triangular bracket and an anchor nail;
step 2: paving the prepared stable fine soil mixture on the top surface of the roadbed or the cushion layer according to the designed layering thickness;
step 3: rolling the paved stable fine-grained soil mixed material layer, and ensuring that the compaction degree reaches the design requirement and the thickness reaches the design layer thickness;
step 4: placing a prestress drag hook in a reserved long straight hole of the steel template;
step 5: connecting the initial end of the galvanized steel wire with a prestress drag hook, weaving the galvanized steel wire along the prestress drag hooks on two sides of the road base, and connecting the crossing points of the galvanized steel wire with a retaining ring to form a continuous galvanized steel wire net between two steel templates;
step 6: adjusting the upper and lower positions of the pre-stress drag hook to enable the galvanized steel wire mesh to be closely attached to the upper surface of the paved and compacted stable fine soil mixed material layer;
step 7: tightening nuts of the prestress draw hooks, and applying prestress to the galvanized steel wire gauze to ensure uniform stress on the galvanized steel wires;
step 8: repeating the steps 2-7 and n-2 times, wherein n is the number of layers of the stable fine-grained soil mixed material layer;
step 9: repeating the steps 2-3; curing the stable fine-grained soil mixed material layer;
step 10: after maintenance is finished, inserting an inserting plate at the joint of the prestress drag hook and the galvanized steel wire, loosening the nut of the prestress drag hook, and removing the steel template.
Compared with the prior art, the invention has the following beneficial effects:
1. the crack resistance is good. The invention is provided with the prestress galvanized steel wire gauze, and the constraint force brought by the galvanized steel wire gauze enables the pavement material to be always in a pressed state, so that the development and extension of cracks are avoided, the strength, the rigidity and the integrity of the pavement structural layer are improved, and the service life of the pavement is prolonged.
2. The pavement has good overall performance. The invention adopts galvanized steel wires and buckles to form a continuous steel wire mesh in construction, avoids the splicing of the steel wire mesh, can ensure the consistency of the strength of all parts and improves the integrity of the pavement.
3. The construction is simple. The prestress is applied from the side, the application mode is simple and convenient, and the construction of other working procedures is not influenced.
4. The economic and environmental benefits are good. The pavement base layer takes the fine-grained soil mixture subjected to lime and cement stabilization treatment as a main filling material, overcomes the defect of crack generation caused by shrinkage of the material through the prestressed steel wire mesh, has low material cost, and can promote full utilization of fine-grained soil.
Drawings
FIG. 1 is a schematic cross-sectional view of a reinforced stabilized fine grained soil base of the invention.
Fig. 2 is a schematic view of the reinforced stabilized fine grained soil foundation of the invention in construction.
In the figure: the device comprises a stable fine-grained soil mixed material layer 1, a galvanized steel wire mesh 2, galvanized steel wires 2-1, a retaining ring 3, an inserting plate 4, a prestress draw hook 5, a draw hook 5-1, a nut 5-2, a steel template 6, a triangular bracket 7 and an anchor nail 8.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, the prestressed reinforced stable fine-grained soil base layer of the invention comprises 4 stable fine-grained soil mixed layers 1 (the number of the stable fine-grained soil mixed layers 1 is not limited to 4, and can be 2, 3 or more than 4), galvanized steel wire meshes 2 and plugboards 4. The stable fine-grained soil mixture layer 1 is paved by a mixture of cement, lime and fine-grained soil. A galvanized steel wire mesh 2 is arranged between two adjacent stable fine soil mixed material layers 1; two groups of plugboards 4 are respectively arranged at two sides of the stable fine-grained soil mixed material layer, the two groups of plugboards 4 are respectively connected with two sides of the galvanized steel wires, and the plugboards 4 apply prestress to the galvanized steel wire mesh 2. The prestress galvanized steel wire mesh 2 is a rectangular mesh woven by galvanized steel wires 2-1, and the crossing nodes of the galvanized steel wires 2-1 are connected through retaining rings 3. The diameter of the galvanized steel wire 2-1 is 2-6 mm.
As shown in fig. 2, the construction device for the prestressed reinforcement stable fine-grained soil base layer comprises two groups of steel templates 6, wherein the two groups of steel templates 6 are arranged in parallel. The outer side surface of the steel template 6 is connected with a plurality of triangular supports 7, the triangular supports 7 are right-angled triangles, a right-angle side of each triangular support 7 is connected with the outer side surface of the steel template 6, and the other right-angle side of each triangular support 7 is fixed on a roadbed or a cushion through an anchor nail 8. A plurality of long straight holes 6-1 are arranged on the steel template 6 along the axis square, and the long straight holes 6-1 are vertically arranged in the length direction. Each long straight hole 6-1 is respectively provided with a prestress draw hook 5, each prestress draw hook 5 comprises a screw and draw hooks 5-1, each draw hook 5-1 is positioned between two groups of steel templates 6, the screw is inserted into each long straight hole 6-1, the screw is provided with a nut 5-2, and the nut is positioned outside each steel template. By rotating the nut, the position of the draw hook can be changed, and prestress can be applied to the galvanized steel wire gauze 2.
The construction method for the prestressed reinforced stable fine-grained soil base layer comprises the following construction steps:
step 1: arranging a group of steel templates 6 on two sides of a roadbed or a cushion layer which is qualified in inspection in an end-to-end mode along the length direction of the route, wherein the steel templates 6 are fixed through a triangular bracket 7 and an anchor nail 8;
step 2: paving the prepared stable fine soil mixture on the top surface of the roadbed or the cushion layer according to the designed layering thickness by adopting a paver and a dump truck;
step 3: rolling the paved stable fine soil mixed material layer by adopting a road roller, and ensuring that the compaction degree is compacted to meet the design requirement and the thickness is thicker than the design layer;
step 4: a prestress drag hook 5 is placed in a reserved long straight hole 6-1 of the steel template 6;
step 5: connecting the initial end of the galvanized steel wire 2-1 with a pre-stress draw hook, weaving the galvanized steel wire along the pre-stress draw hooks at the two sides of the road base, and connecting the crossing nodes of the galvanized steel wire 2-1 by using a retaining ring 3, so that the galvanized steel wire forms a continuous galvanized steel wire mesh 2 between two steel templates;
step 6: the upper and lower positions of the pre-stress drag hook 5 are adjusted to enable the galvanized steel wire mesh 2 to be closely attached to the upper surface of the paved and compacted stable fine soil mixed material layer;
step 7: tightening nuts of the pre-stress draw hooks 5, and applying pre-stress to the galvanized steel wire gauze 2 to ensure that the galvanized steel wires are uniformly stressed;
step 8: repeating the steps 2-7 and n-2 times, wherein n is the number of layers of the stable fine-grained soil mixed material layer, and n=4 in the embodiment;
step 9: repeating the steps 2-3; curing the stable fine-grained soil mixed material layer;
step 10: after maintenance, inserting the plugboard 4 at the joint of the prestress drag hook 5 and the galvanized steel wire 2-1, loosening the nut of the prestress drag hook 5, and dismantling the steel template 6.
The concrete implementation mode of the invention is that the galvanized steel wire 2-1 and the retaining ring 3 are adopted to form the galvanized steel wire net 2 on the road construction site, and the prestress is applied to the galvanized steel wire net 2 from the side by utilizing the prestress draw hook 5, and the prestress is locked by the inserting plate 4, so that the continuity of the galvanized steel wire net 2 along the length direction of the road can be ensured, the splicing of the galvanized steel wire net 2 is avoided, the prestress application is convenient, the stress condition of the road base layer is changed, the strength and the rigidity of the road base layer are fully improved, the development and the extension of cracks are avoided, and the service life of the road structure is prolonged.
Claims (2)
1. The construction method of the prestressed reinforced stable fine grained soil base layer comprises a plurality of stable fine grained soil mixed material layers, galvanized steel wire meshes and plugboards, wherein the prestressed reinforced stable fine grained soil base layer comprises a plurality of stable fine grained soil mixed material layers; the stable fine-grained soil mixture layer is paved by a mixture of cement, lime and fine-grained soil; a galvanized steel wire mesh is arranged between two adjacent stable fine soil mixed material layers; the galvanized steel wire mesh is applied with prestress; two groups of plugboards are respectively arranged at two sides of the stable fine-grained soil mixed material layer and are respectively connected with two sides of the galvanized steel wire mesh; the prestress galvanized steel wire mesh is a rectangular mesh woven by galvanized steel wires, and the intersecting nodes of the galvanized steel wires are connected through retaining rings;
the construction device for stabilizing the fine-grained soil base layer by prestress reinforcement adopted by construction comprises two groups of steel templates, wherein the two groups of steel templates are arranged in parallel; a plurality of long straight holes are formed in the steel template along the axis square, and the long straight holes are vertically arranged in the length direction; each long straight hole is internally provided with a prestress drag hook respectively, the prestress drag hook comprises a screw rod and drag hooks, the drag hooks are positioned between two groups of steel templates, the screw rod is inserted into the long straight holes, the screw rod is provided with nuts, and the nuts are positioned outside the steel templates;
the construction steps are as follows:
step 1: arranging a group of steel templates on two sides of the roadbed or the cushion layer which is qualified in inspection in an end-to-end mode along the length direction of the route, wherein the steel templates are fixed through a triangular bracket and an anchor nail;
step 2: paving the prepared stable fine soil mixture on the top surface of the roadbed or the cushion layer according to the designed layering thickness;
step 3: rolling the paved stable fine-grained soil mixed material layer, and ensuring that the compaction degree reaches the design requirement and the thickness reaches the design layer thickness;
step 4: placing a prestress drag hook in a reserved long straight hole of the steel template;
step 5: connecting the initial end of the galvanized steel wire with a prestress drag hook, weaving the galvanized steel wire along the prestress drag hooks on two sides of the road base, and connecting the crossing points of the galvanized steel wire with a retaining ring to form a continuous galvanized steel wire net between two steel templates;
step 6: adjusting the upper and lower positions of the pre-stress drag hook to enable the galvanized steel wire mesh to be closely attached to the upper surface of the paved and compacted stable fine soil mixed material layer;
step 7: tightening nuts of the prestress draw hooks, and applying prestress to the galvanized steel wire gauze to ensure uniform stress on the galvanized steel wires;
step 8: repeating the steps 2-7 and n-2 times, wherein n is the number of layers of the stable fine-grained soil mixed material layer;
step 9: repeating the steps 2-3; curing the stable fine-grained soil mixed material layer;
step 10: after maintenance is finished, inserting an inserting plate at the joint of the prestress drag hook and the galvanized steel wire, loosening the nut of the prestress drag hook, and removing the steel template.
2. The construction method of the prestressed reinforced stable fine-grained soil base layer according to claim 1, wherein the construction method comprises the following steps: the diameter of the galvanized steel wire is 2-6 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111545717.0A CN114250661B (en) | 2021-12-17 | 2021-12-17 | Prestressed reinforced stable fine-grained soil base layer and construction method and device thereof |
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| CN202111545717.0A CN114250661B (en) | 2021-12-17 | 2021-12-17 | Prestressed reinforced stable fine-grained soil base layer and construction method and device thereof |
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| CN114250661A CN114250661A (en) | 2022-03-29 |
| CN114250661B true CN114250661B (en) | 2023-08-15 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB755339A (en) * | 1953-03-11 | 1956-08-22 | Preload Co Inc | Reinforced pavements |
| JPH0720302U (en) * | 1993-09-20 | 1995-04-11 | 武男 稲葉 | Pavement base sheet |
| US7097390B1 (en) * | 2005-06-16 | 2006-08-29 | Mega, Inc. | Fine-grained fill reinforcing apparatus and method |
| CN101775772A (en) * | 2010-02-01 | 2010-07-14 | 张东省 | Sloping tensioning method two-way prestressed concrete pavement construction method |
| KR20110043094A (en) * | 2009-10-21 | 2011-04-27 | 주식회사 삼송마그마 | Adhesive composition for use on roads and a method of adhesive construction using the same |
| CN106337351A (en) * | 2016-10-13 | 2017-01-18 | 余伟蓉 | Asphalt pavement additionally laid with rib net |
| CN208430398U (en) * | 2017-09-04 | 2019-01-25 | 浙江大学城市学院 | A kind of prestressing force is to pull-type Reinforced Embankment structure |
| CN111304993A (en) * | 2020-03-17 | 2020-06-19 | 长沙理工大学 | Road surface adds muscle structure |
-
2021
- 2021-12-17 CN CN202111545717.0A patent/CN114250661B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB755339A (en) * | 1953-03-11 | 1956-08-22 | Preload Co Inc | Reinforced pavements |
| JPH0720302U (en) * | 1993-09-20 | 1995-04-11 | 武男 稲葉 | Pavement base sheet |
| US7097390B1 (en) * | 2005-06-16 | 2006-08-29 | Mega, Inc. | Fine-grained fill reinforcing apparatus and method |
| KR20110043094A (en) * | 2009-10-21 | 2011-04-27 | 주식회사 삼송마그마 | Adhesive composition for use on roads and a method of adhesive construction using the same |
| CN101775772A (en) * | 2010-02-01 | 2010-07-14 | 张东省 | Sloping tensioning method two-way prestressed concrete pavement construction method |
| CN106337351A (en) * | 2016-10-13 | 2017-01-18 | 余伟蓉 | Asphalt pavement additionally laid with rib net |
| CN208430398U (en) * | 2017-09-04 | 2019-01-25 | 浙江大学城市学院 | A kind of prestressing force is to pull-type Reinforced Embankment structure |
| CN111304993A (en) * | 2020-03-17 | 2020-06-19 | 长沙理工大学 | Road surface adds muscle structure |
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| CN114250661A (en) | 2022-03-29 |
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