CN114250661A - 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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- CN114250661A CN114250661A CN202111545717.0A CN202111545717A CN114250661A CN 114250661 A CN114250661 A CN 114250661A CN 202111545717 A CN202111545717 A CN 202111545717A CN 114250661 A CN114250661 A CN 114250661A
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- grained soil
- steel wire
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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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- Road Paving Structures (AREA)
Abstract
The invention discloses a prestressed reinforced stabilized fine-grained soil base layer and a construction method and a device thereof, wherein the prestressed reinforced stabilized fine-grained soil base layer comprises a plurality of stabilized fine-grained soil mixed material layers, a galvanized steel wire mesh and inserting plates; the stable fine-grained soil mixed material layer is formed by paving a mixture of cement, lime and fine-grained soil; a galvanized steel wire mesh is arranged between two adjacent stable fine-grained soil mixed material layers; prestress is applied to the galvanized steel wire mesh; two sides of the stable fine-grained soil mixed material layer are respectively provided with a group of plugboards, and the two groups of plugboards are respectively connected with two side edges of the galvanized steel wire mesh. The invention realizes the prestress application to the continuous pavement structure layer, fully improves the strength and the rigidity of the pavement structure layer, can effectively control the formation and the 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 a device thereof.
Background
The asphalt pavement taking the semi-rigid material as the pavement base has the advantages of high strength, good plate body property, low cost, simple construction, low noise, comfortable driving and the like, and is widely applied to the highway 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 layer materials and the like, the semi-rigid base layer asphalt pavement has more diseases, and particularly when inorganic binder is adopted to stabilize or improve fine-grained soil as the semi-rigid base layer, the semi-rigid base layer asphalt pavement is easy to crack due to temperature shrinkage drying and shrinkage, and the crack can be reflected to cause development of the asphalt pavement, rainwater infiltration and pavement sludge pumping, so that the normal performance of the road function is seriously influenced, the service life of the pavement is shortened, and the maintenance result of the pavement 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 urgently by engineering technicians 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, the stress state of a pavement structure layer can be changed, the integrity of the pavement is effectively improved, the generation and development of cracks are controlled, the strength of the pavement is ensured, and the sustainable development of the pavement structure is realized.
Disclosure of Invention
In order to solve the problems, the invention provides the prestress reinforcement stable fine grained soil base layer which has strong crack resistance, good integrity, long service life and good ecological environment effect, and provides the construction method and the construction device thereof for the prestress reinforcement stable fine grained soil base layer which are convenient to construct and controllable in quality.
The technical scheme for solving the problems is as follows: a prestressed reinforced stable fine-grained soil base layer is characterized by comprising a plurality of stable fine-grained soil mixed material layers, a galvanized steel wire mesh and inserting plates; the stable fine-grained soil mixed material layer is formed by paving a mixture of cement, lime and fine-grained soil; a galvanized steel wire mesh is arranged between two adjacent stable fine-grained soil mixed material layers; prestress is applied to the galvanized steel wire mesh; two sides of the stable fine-grained soil mixture layer are respectively provided with a group of plugboards, and the two groups of plugboards are respectively connected with two side edges of the galvanized steel wire.
In the prestressed reinforced stabilized fine grained soil base layer, the prestressed galvanized steel wire mesh is a rectangular mesh woven by galvanized steel wires, and the crossed nodes of the galvanized steel wires are connected through retaining rings.
In the prestress reinforced stable fine-grained soil base layer, the diameter of the galvanized steel wire is 2-6 mm.
The construction device for the prestressed reinforced stabilized fine grained soil base comprises two groups of steel templates which are arranged in parallel; a plurality of long straight holes are arranged on the steel template along the axis square, and the long straight holes are vertically arranged in the length direction; a prestress draw hook is arranged in each long straight hole respectively and comprises a screw and a draw hook, the draw hook is located between two groups of steel templates, the screw is inserted into the long straight hole, a nut is arranged on the screw, and the nut is located on the outer side of the steel templates.
A construction method of the prestress 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 through inspection in an end-to-end connection mode along the length direction of the route, wherein the steel templates are fixed through triangular supports and anchors;
step 2: paving the prepared stable fine-grained soil mixture on the top surface of a roadbed or a cushion layer according to the designed layering thickness;
and step 3: rolling the paved stable fine-grained soil mixed material layer to ensure that the compaction degree reaches the design requirement and the thickness reaches the design layer thickness;
and 4, step 4: placing a prestress draw hook in a reserved long straight hole of the steel template;
and 5: connecting the initial end of the galvanized steel wire with a prestress draw hook, weaving the galvanized steel wire along the prestress draw hooks on two sides of the roadbed, and connecting the crossed nodes of the galvanized steel wire by using retaining rings to form a continuous galvanized steel wire mesh between the two steel templates;
step 6: adjusting the upper and lower positions of the prestressed drag hook to ensure that the galvanized steel wire mesh is tightly attached to the upper surface of the paved and compacted stable fine-grained soil mixed material layer;
and 7: screwing down a nut of the prestress draw hook to apply prestress on the galvanized steel wire mesh so as to ensure that the galvanized steel wire is uniformly stressed;
and 8: repeating the step 2-the step 7 n-2 times, wherein n is the number of layers of the stable fine-grained soil mixed material layer;
and step 9: repeating the step 2 to the step 3; maintaining the stable fine-grained soil mixed material layer;
step 10: after the maintenance is finished, inserting the plugboard at the joint of the prestress draw hook and the galvanized steel wire, loosening the nut of the prestress draw hook and dismantling the steel template.
Compared with the prior art, the invention has the following beneficial effects:
1. the crack resistance is good. The prestressed galvanized steel wire mesh is arranged, the constraint force brought by the galvanized steel wire mesh enables the pavement material to be in a pressed state all the time, the development and extension of cracks are avoided, the strength, the rigidity and the integrity of a pavement structure layer are improved, and the service life of the pavement is prolonged.
2. The overall performance of the pavement is good. The galvanized steel wire and the retaining ring are adopted to form the continuous steel wire mesh in the construction process, so that the splicing of the steel wire mesh is avoided, the consistency of the strength of each part can be ensured, and the integrity of the pavement is improved.
3. The construction is simple. The prestress is applied from the side surface, 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 of the invention takes the fine grained soil mixture which is subjected to the stabilizing treatment of lime and cement as the main filling material, overcomes the defect of crack generation caused by the shrinkage of the material through the prestressed steel wire mesh, has low material cost, and can promote the full utilization of the fine grained soil.
Drawings
Fig. 1 is a schematic cross-sectional view of a reinforced stabilized fine-grained soil base of the present invention.
Fig. 2 is a schematic diagram of construction of a reinforced stabilized fine-grained soil base layer according to the invention.
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, retaining rings 3, inserting plates 4, prestress draw hooks 5, draw hooks 5-1, nuts 5-2, steel templates 6, triangular supports 7 and anchor bolts 8.
Detailed Description
The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings.
As shown in fig. 1, the prestressed reinforced stabilized fine-grained soil base layer of the present invention includes 4 stabilized fine-grained soil mixture layers 1 (the number of the stabilized fine-grained soil mixture layers 1 is not limited to 4, and may be 2, 3, or more than 4), a galvanized steel wire mesh 2, and an insert plate 4. The stable fine-grained soil mixed material layer 1 is formed by paving a mixture of cement, lime and fine-grained soil. A galvanized steel wire mesh 2 is arranged between two adjacent stable fine-grained soil mixed material layers 1; two sides of the stable fine-grained soil mixture layer are respectively provided with a group of inserting plates 4, the two groups of inserting plates 4 are respectively connected with two side edges of the galvanized steel wire, and the inserting plates 4 apply prestress on the galvanized steel wire mesh 2. The prestressed galvanized steel wire mesh 2 is a rectangular mesh woven by galvanized steel wires 2-1, and the crossed 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 stabilizing a fine soil base layer by prestress reinforcement comprises two groups of steel templates 6, wherein the two groups of steel templates 6 are arranged in parallel. The outer side of the steel formwork 6 is connected with a plurality of triangular supports 7, each triangular support 7 is a right-angled triangle, a right-angled edge of each triangular support 7 is connected with the outer side of the steel formwork 6, and the other right-angled edge of each triangular support 7 is fixed on a roadbed or a cushion layer through an anchor 8. The steel moulding plate 6 is provided with a plurality of long straight holes 6-1 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 internally provided with a prestressed drag hook 5, each prestressed drag hook 5 comprises a screw rod and a drag hook 5-1, the drag hook 5-1 is positioned between the two groups of steel templates 6, the screw rod is inserted into the long straight hole 6-1, the screw rod is provided with a nut 5-2, and the nut is positioned on the outer side of the steel template. Through swivel nut, can realize the change of drag hook position, exert prestressing force to galvanized steel wire net 2.
A construction method of the prestress reinforced stable fine-grained soil base layer comprises the following construction steps:
step 1: a group of steel templates 6 are respectively arranged at two sides of the roadbed or the cushion layer which is qualified through inspection in an end-to-end connection mode along the length direction of the route, and the steel templates 6 are fixed through triangular brackets 7 and anchoring bolts 8;
step 2: paving the prepared stable fine-grained 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;
and step 3: rolling the paved stable fine-grained soil mixed material layer by using a road roller, and ensuring that the compaction degree reaches the design requirement and the thickness reaches the design layer thickness;
and 4, step 4: placing a prestressed drag hook 5 in a reserved long straight hole 6-1 of a steel template 6;
and 5: connecting the starting end of the galvanized steel wire 2-1 with a prestress draw hook, weaving the galvanized steel wire along the prestress draw hooks on two sides of the roadbed, and connecting the crossed nodes of the galvanized steel wire 2-1 by using retaining rings 3 to ensure that the galvanized steel wire forms a continuous galvanized steel wire mesh 2 between two steel templates;
step 6: adjusting the upper and lower positions of the prestressed drag hook 5 to ensure that the galvanized steel wire mesh 2 is tightly attached to the upper surface of the paved and compacted stable fine-grained soil mixed material layer;
and 7: screwing down the nut of the prestress draw hook 5 to apply prestress on the galvanized steel wire mesh 2 so as to ensure that the galvanized steel wire is uniformly stressed;
and 8: repeating the step 2-the step 7 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;
and step 9: repeating the step 2 to the step 3; maintaining the stable fine-grained soil mixed material layer;
step 10: after the maintenance is finished, inserting the inserting plate 4 at the joint of the prestress draw hook 5 and the galvanized steel wire 2-1, loosening the nut of the prestress draw hook 5 and removing the steel template 6.
The galvanized steel wire mesh 2 is formed on a pavement construction site by adopting the galvanized steel wires 2-1 and the retaining rings 3, prestressing force is applied to the galvanized steel wire mesh 2 from the side by utilizing the prestressing force draw hooks 5, and the prestressing force is locked by the inserting plates 4, so that the continuity of the galvanized steel wire mesh 2 along the length direction of the pavement can be ensured, the splicing of the galvanized steel wire mesh 2 is avoided, the prestressing force is conveniently applied, the stress condition of a pavement base is changed, the strength and the rigidity of the pavement base are fully improved, cracks are prevented from developing and extending, and the service life of the pavement structure is prolonged.
Claims (6)
1. A prestressed reinforced stable fine-grained soil base layer is characterized by comprising a plurality of stable fine-grained soil mixed material layers, a galvanized steel wire mesh and inserting plates; the stable fine-grained soil mixed material layer is formed by paving a mixture of cement, lime and fine-grained soil; a galvanized steel wire mesh is arranged between two adjacent stable fine-grained soil mixed material layers; prestress is applied to the galvanized steel wire mesh; two sides of the stable fine-grained soil mixed material layer are respectively provided with a group of plugboards, and the two groups of plugboards are respectively connected with two side edges of the galvanized steel wire mesh.
2. The prestressed reinforced stabilized fine grained soil base of claim 1, wherein: the prestressed galvanized steel wire mesh is a rectangular mesh woven by galvanized steel wires, and the crossed nodes of the galvanized steel wires are connected through retaining rings.
3. The prestressed reinforced stabilized fine grained soil base of claim 2, wherein: the diameter of the galvanized steel wire is 2-6 mm.
4. The prestressed reinforced stabilized fine grained soil base of claim 2, wherein: and a group of inserting plates are respectively arranged at two sides of the stable fine-grained soil mixed material layer and are connected with the steel wire mesh.
5. A construction apparatus for reinforcing and stabilizing a fine earth base by prestressing as claimed in any one of claims 1 to 3, wherein: the steel formwork comprises two groups of steel formworks which are arranged in parallel; a plurality of long straight holes are arranged on the steel template along the axis square, and the long straight holes are vertically arranged in the length direction; a prestress draw hook is arranged in each long straight hole respectively and comprises a screw and a draw hook, the draw hook is located between two groups of steel templates, the screw is inserted into the long straight hole, a nut is arranged on the screw, and the nut is located on the outer side of the steel templates.
6. A construction method of the prestressed reinforcement stabilized fine-grained soil base layer according to any one of claims 1 to 3, comprising the following steps:
step 1: arranging a group of steel templates on two sides of the roadbed or the cushion layer which is qualified through inspection in an end-to-end connection mode along the length direction of the route, wherein the steel templates are fixed through triangular supports and anchors;
step 2: paving the prepared stable fine-grained soil mixture on the top surface of a roadbed or a cushion layer according to the designed layering thickness;
and step 3: rolling the paved stable fine-grained soil mixed material layer to ensure that the compaction degree reaches the design requirement and the thickness reaches the design layer thickness;
and 4, step 4: placing a prestress draw hook in a reserved long straight hole of the steel template;
and 5: connecting the initial end of the galvanized steel wire with a prestress draw hook, weaving the galvanized steel wire along the prestress draw hooks on two sides of the roadbed, and connecting the crossed nodes of the galvanized steel wire by using retaining rings to form a continuous galvanized steel wire mesh between the two steel templates;
step 6: adjusting the upper and lower positions of the prestressed drag hook to ensure that the galvanized steel wire mesh is tightly attached to the upper surface of the paved and compacted stable fine-grained soil mixed material layer;
and 7: screwing down a nut of the prestress draw hook to apply prestress on the galvanized steel wire mesh so as to ensure that the galvanized steel wire is uniformly stressed;
and 8: repeating the step 2-the step 7 n-2 times, wherein n is the number of layers of the stable fine-grained soil mixed material layer;
and step 9: repeating the step 2 to the step 3; maintaining the stable fine-grained soil mixed material layer;
step 10: after the maintenance is finished, inserting the plugboard at the joint of the prestress draw hook and the galvanized steel wire, loosening the nut of the prestress draw hook and dismantling the steel template.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN114250661A true CN114250661A (en) | 2022-03-29 |
| CN114250661B 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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| CN114250661B (en) | 2023-08-15 |
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