CN210946530U - Quick repair structure for road and bridge transition section - Google Patents
Quick repair structure for road and bridge transition section Download PDFInfo
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- CN210946530U CN210946530U CN201921429925.2U CN201921429925U CN210946530U CN 210946530 U CN210946530 U CN 210946530U CN 201921429925 U CN201921429925 U CN 201921429925U CN 210946530 U CN210946530 U CN 210946530U
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- foundation bed
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- lightweight concrete
- transition section
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Abstract
The utility model relates to a structure is restoreed fast to road bridge changeover portion, this structure including establish in the excavation line arrange the sand cushion layer under the embankment soil in, arrange in embankment soil and the intraformational several layers of bed are the lightweight concrete block of step and establish bed top layer on the bed bottom. Waterproof geotextiles are arranged between the sand cushion layer and the lightweight concrete building block and between the foundation bed bottom layer and the foundation bed surface layer; a metal net is arranged on the waterproof geotextile between the foundation bed bottom layer and the foundation bed surface layer; cast-in-place micro-expansion high-fluidity mortar is arranged between every two adjacent lightweight concrete blocks; and backfill is arranged on the periphery of the plurality of layers of the lightweight concrete building blocks. The utility model discloses can solve the part changeover portion and appear inhomogeneous the subsiding, current treatment need fill the problem of railway ballast repeatedly.
Description
Technical Field
The utility model relates to a road bridge construction technical field especially relates to a structure is restoreed fast to road bridge changeover portion.
Background
In the road and bridge construction, adopt traditional filler and technology to design to the changeover portion position, the field operation can receive the little influence of working face for each layer compaction of changeover portion is difficult to control, and then the compaction is inhomogeneous or not enough problem appears, leads to producing and subsides and inhomogeneous settlement, thereby is difficult to keep changeover portion section circuit ride comfort.
At present, although railway ballast can be repeatedly filled after a road and bridge transition section is damaged, the problem of settlement of the road and bridge transition section cannot be thoroughly solved, and the problems of large workload, high manufacturing cost and the like exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a structure is restoreed fast to the road bridge changeover portion of uneven problem is subsided in effective solution is provided.
In order to solve the above problem, a road bridge changeover portion restores structure fast, its characterized in that: the structure comprises a sand cushion layer arranged in an excavation line and arranged below embankment soil, a plurality of layers of light concrete blocks which are arranged in the embankment soil and a foundation bed bottom layer and are in a step shape, and a foundation bed surface layer arranged on the foundation bed bottom layer; waterproof geotextiles are arranged between the sand cushion layer and the lightweight concrete building block and between the foundation bed bottom layer and the foundation bed surface layer; a metal net is arranged on the waterproof geotextile between the foundation bed bottom layer and the foundation bed surface layer; cast-in-place micro-expansion high-fluidity mortar is arranged between every two adjacent lightweight concrete blocks; and backfill is arranged on the periphery of the plurality of layers of the lightweight concrete building blocks.
The sand cushion layer adopts open-graded broken stones with the grain diameter smaller than 1cm and the permeability coefficient larger than 0.5cm/s, and the thickness of the broken stones is 10 cm.
The waterproof geotextile between the foundation bed bottom layer and the foundation bed surface layer longitudinally exceeds the lightweight concrete building block by at least 2 m.
The size of the light concrete block is 0.5m long by 0.5m wide by 0.4m high; its dry density is not less than 400kg/m3And every two light concrete blocks have a longitudinal and transverse spacing of3~5cm。
The metal net is formed by phi 1mm @2cm × 2cm and tensile strength not less than 380N/mm2The galvanized steel wire is welded.
The longitudinal length of the metal mesh is equal to the length of the waterproof geotextile between the foundation bed bottom layer and the foundation bed surface layer.
The surface layer of the foundation bed is made of graded broken stones and is doped with ordinary Portland cement with the strength grade of 32.5, wherein the mass of the ordinary Portland cement is 5%.
The cast-in-place micro-expansion high-fluidity mortar has the same design strength as the lightweight concrete building block, and the mass mixture ratio of the mortar is as follows: mineral powder: fine aggregate: swelling agent: water reducing agent: water =10% ~ 13%: 8% -11%: 68% -72%: 2% -2.5%: 0.33% -0.37%: 7% -7.5%; the cement is ordinary Portland cement with the strength grade of 42.5; the swelling agent is UEA swelling agent.
The backfill soil is a conventional B group filling material with the thickness of more than 30 cm.
Compared with the prior art, the utility model has the following advantage:
the utility model discloses make full use of lightweight concrete block factory building is prefabricated, and the scene is directly piled up and is constituted the main part, and the gap adopts cast-in-place micro-expansion high fluidity mortar material to pour and constitutes overall structure, combines relevant additional structure, can solve the problem that partial changeover portion appears inhomogeneous settlement, current treatment need fill the railway ballast repeatedly.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a longitudinal sectional view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is the utility model discloses well lightweight concrete block construction layout.
In the figure: 1-sand cushion layer; 2-waterproof geotextile; 3-light concrete building blocks; 4-casting micro-expansion high-fluidity mortar in situ; 5-a metal mesh; 6-bed surface layer; 7-backfilling.
Detailed Description
As shown in fig. 1 to 3, a rapid repair structure for a transition section of a road bridge comprises a sand cushion layer 1 arranged in an excavation line and arranged below embankment soil, a plurality of layers of light concrete blocks 3 arranged in the embankment soil and a foundation bed bottom layer and in a step shape, and a foundation bed surface layer 6 arranged on the foundation bed bottom layer.
Wherein: the sand cushion layer 1 adopts open-graded broken stones with the grain diameter less than 1cm and the permeability coefficient more than 0.5cm/s, and the thickness of the broken stones is 10 cm.
The waterproof geotextile 2 between the bed bottom layer and the bed surface layer 6 longitudinally exceeds the lightweight concrete block 3 by at least 2 m.
The light concrete block 3 has a size of 0.5m long by 0.5m wide by 0.4m high; its dry density is not less than 400kg/m3And the longitudinal and transverse spacing between every two light concrete blocks 3 is 3-5 cm.
The metal net 5 is made of phi 1mm @2cm × 2cm, and has the tensile strength not less than 380N/mm2The galvanized steel wire is welded.
The longitudinal length of the metal mesh 5 is equal to the length of the waterproof geotextile 2 between the bed bottom layer and the bed surface layer 6.
The material of the surface layer 6 of the foundation bed is graded macadam and is mixed with ordinary Portland cement with the strength grade of 32.5, 5 percent of the mass of the Portland cement.
The design strength of the cast-in-situ micro-expansion high-fluidity mortar 4 is the same as that of the lightweight concrete block 3, and the mass (kg) mixing ratio is as follows: mineral powder: fine aggregate: swelling agent: water reducing agent: water =10% ~ 13%: 8% -11%: 68% -72%: 2% -2.5%: 0.33% -0.37%: 7% -7.5%; the cement is ordinary Portland cement with the strength grade of 42.5; the swelling agent is a UEA swelling agent.
The backfill 7 is a conventional group B filler with a thickness greater than 30 cm.
The utility model discloses a construction method as follows:
⑴ paving 10cm thick sand cushion with open graded broken stones with particle size less than 1cm and permeability coefficient greater than 0.5 cm/s;
⑵ the sand cushion layer 1 is paved with waterproof geotextile 2 in full-spread mode, when the waterproof geotextile 2 needs to be lapped, the waterproof geotextile 2 needs to be lapped by adhesive material (such as organosilicon waterproof coating) with waterproof effect, the lapping width needs to exceed 10 cm;
⑶ carrying out construction of the lightweight concrete building block 3:
the lightweight concrete building block 3 is formed by factory prefabrication and maintenance, has the size of 0.5m, 0.4m and the dry density of not less than 400kg/m3(ii) a When laying, the light concrete blocks are constructed in a layered mode and placed in a staggered mode, and the longitudinal and transverse spacing between every two light concrete blocks 3 is 3-5 cm; when a smaller-size building block type is needed, the building block type can be obtained by cutting a large building block;
⑷, carrying out cast-in-situ micro-expansion high-fluidity mortar 4 construction according to the designed strength:
firstly, spraying water to the lightweight concrete block 3 to basically ensure that the surface of the block does not absorb water; before pouring the cast-in-place micro-expansion high-fluidity mortar 4, the periphery of the building block needs to be plugged; the construction of the building blocks is ensured to be not higher than two layers of cast-in-situ micro-expansion high-fluidity mortar casting surfaces as much as possible;
⑸ laying waterproof geotextile 2, making the geotextile 2 longitudinally exceed the lightweight concrete block 3 by at least 2m, when the geotextile 2 needs to be lapped, adopting adhesive material (such as organosilicon waterproof coating) with waterproof effect to lap, the lapping width needs to exceed 10 cm;
⑹ laying metal net 5
The tensile strength is not less than 380N/mm and is measured by phi 1mm @2cm × 2cm2The galvanized steel wires are welded into a metal net 5, the longitudinal length of the metal net 5 is equal to the length of the waterproof geotextile 2 in the step ⑸, and binding connection can be carried out by adopting binding wires when the metal net 5 needs to be connected;
⑺, filling the surface layer 6 of the foundation bed with graded macadam and ordinary Portland cement with the strength grade of 32.5 accounting for 5% of the mass of the macadam, and constructing according to the process of first paving and then rolling;
⑻ the construction of the backfill 7 is carried out by adopting the conventional group B filler, the thickness is more than 30cm, when the maintenance time is short, the construction of the backfill 7 can be avoided firstly, the normal operation of the line is ensured, but the construction of the backfill 7 is completed within 15 days after the construction of the main body structure of the lightweight concrete is completed.
Claims (7)
1. The utility model provides a road bridge changeover portion restores structure fast which characterized in that: the structure comprises a sand cushion layer (1) arranged in an excavation line and arranged below embankment soil, a plurality of layers of light concrete blocks (3) which are arranged in the embankment soil and a foundation bed bottom layer and are in a step shape, and a foundation bed surface layer (6) arranged on the foundation bed bottom layer; waterproof geotextiles (2) are arranged between the sand cushion layer (1) and the lightweight concrete building block (3) and between the foundation bed bottom layer and the foundation bed surface layer (6); a metal net (5) is arranged on the waterproof geotextile (2) between the foundation bed bottom layer and the foundation bed surface layer (6); cast-in-place micro-expansion high-fluidity mortar (4) is arranged between two adjacent lightweight concrete blocks (3); backfill (7) is arranged on the periphery of the plurality of layers of the lightweight concrete building blocks (3).
2. The road bridge transition section rapid repair structure of claim 1, wherein: the sand cushion layer (1) adopts open-graded broken stones with the grain diameter smaller than 1cm and the permeability coefficient larger than 0.5cm/s, and the thickness of the open-graded broken stones is 10 cm.
3. The road bridge transition section rapid repair structure of claim 1, wherein: the waterproof geotextile (2) between the foundation bed bottom layer and the foundation bed surface layer (6) longitudinally exceeds the lightweight concrete building block (3) by at least 2 m.
4. The road bridge transition section rapid repair structure of claim 1, wherein: the size of the light concrete block (3) is 0.5m long by 0.5m wide by 0.4m high; its dry density is not less than 400kg/m3And the longitudinal and transverse spacing between every two light concrete blocks (3) is 3-5 cm.
5. Such as rightThe rapid repair structure for the road and bridge transition section according to claim 1 is characterized in that the metal net (5) is made of phi 1mm @2cm × 2cm, and has the tensile strength of not less than 380N/mm2The galvanized steel wire is welded.
6. The road bridge transition section rapid repair structure of claim 1, wherein: the longitudinal length of the metal net (5) is equal to the length of the waterproof geotextile (2) between the foundation bed bottom layer and the foundation bed surface layer (6).
7. The road bridge transition section rapid repair structure of claim 1, wherein: the backfill soil (7) is a group B filler with the thickness of more than 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921429925.2U CN210946530U (en) | 2019-08-30 | 2019-08-30 | Quick repair structure for road and bridge transition section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921429925.2U CN210946530U (en) | 2019-08-30 | 2019-08-30 | Quick repair structure for road and bridge transition section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210946530U true CN210946530U (en) | 2020-07-07 |
Family
ID=71375629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921429925.2U Expired - Fee Related CN210946530U (en) | 2019-08-30 | 2019-08-30 | Quick repair structure for road and bridge transition section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210946530U (en) |
-
2019
- 2019-08-30 CN CN201921429925.2U patent/CN210946530U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200707 Termination date: 20210830 |