CN210946332U - Assembled prestressing force road bed structure - Google Patents
Assembled prestressing force road bed structure Download PDFInfo
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- CN210946332U CN210946332U CN201921429924.8U CN201921429924U CN210946332U CN 210946332 U CN210946332 U CN 210946332U CN 201921429924 U CN201921429924 U CN 201921429924U CN 210946332 U CN210946332 U CN 210946332U
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Abstract
The utility model relates to an assembled prestressed roadbed structure, this structure include rubble bed course, concrete base, lightweight concrete block, lightweight concrete cushion and upper portion packing layer. The gravel cushion layer consists of a lower part and an upper part; the center of the concrete base is provided with an upper part, and a plurality of layers of light concrete blocks and an upper packing layer are sequentially arranged on the concrete base; two ends of the concrete base are provided with prefabricated grooves, and reinforced concrete prefabricated plates are embedded in the prefabricated grooves; a lightweight concrete block is arranged between the two reinforced concrete precast slabs; cast-in-place micro-expansion high-fluidity mortar is arranged between two adjacent lightweight concrete blocks; a lightweight concrete cushion block and a steel cable are respectively arranged between two adjacent layers of lightweight concrete building blocks, and two ends of the steel cable are fixed on the reinforced concrete precast slab; waterproof geotextile I is arranged between the bottommost layer lightweight concrete block and the upper part and between the bottommost layer lightweight concrete block and the concrete base; and a waterproof geotextile II is arranged between the topmost light concrete block and the upper packing layer. The utility model discloses stable in structure can realize quick construction.
Description
Technical Field
The utility model relates to a special native area high embankment is built technical field fast, especially relates to an assembled prestressing force roadbed structure.
Background
At present, when a high embankment in a special soil area is designed by adopting traditional filling materials and processes, the problems of large sedimentation, long consolidation time, poor stability, large occupied area and the like exist, and the problems of large workload, high manufacturing cost and the like exist; when cast-in-place light soil is adopted for filling, the problems of cement dust, hydration heat, pouring layering segregation and the like are easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an assembled prestressed roadbed structure of stable in structure, quick construction is provided.
In order to solve the above problem, an assembled prestressing force road bed structure, its characterized in that: the structure comprises a gravel cushion layer, a concrete base, a light concrete block, a light concrete cushion block and an upper packing layer; the gravel cushion layer consists of a lower part and an upper part; the center of the concrete base is provided with the upper part, and a plurality of layers of the light concrete blocks and the upper part packing layer are sequentially arranged on the upper part; two ends of the concrete base are provided with prefabricated grooves, and reinforced concrete prefabricated plates are embedded in the prefabricated grooves; a plurality of layers of light concrete blocks which are arranged in a staggered manner are arranged between the two reinforced concrete precast slabs; cast-in-place micro-expansion high-fluidity mortar is arranged between every two adjacent lightweight concrete blocks; the light concrete cushion blocks and the steel cable arranged in the steel cable sleeve are respectively arranged between two adjacent layers of the light concrete building blocks, and two ends of the steel cable are fixed on the reinforced concrete precast slab; waterproof geotextile I is arranged among the light concrete building blocks on the bottommost layer, the upper part and the concrete base; and a waterproof geotextile II is arranged between the light concrete block at the topmost layer and the upper packing layer.
The broken stone cushion layer adopts open-graded broken stones with the grain size of 1cm, and the permeability coefficient is more than 0.5 cm/s; the thickness of the lower part of the concrete base is 12-18 cm, and the thickness of the upper part of the concrete base is the same as the height of the concrete base.
The distance between the precast groove and the outer boundary of the concrete base plate is not less than 20cm, and the distance between the precast groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm.
The reinforced concrete precast slab is coated with organic silicon waterproof paint, the size of the reinforced concrete precast slab is 1m high by 1m wide by 0.15m thick, the two transverse sides of the reinforced concrete precast slab are grooves, the two longitudinal sides of the reinforced concrete precast slab are bulges, and the middle of the reinforced concrete precast slab is provided with an anchor cable hole; the anchor cable holes are connected with the steel cable.
The waterproof geotextile I is fully paved and is higher than the upper surface by more than 10 cm.
The waterproof geotextile II transversely exceeds the lightweight concrete building block by at least 0.1 m.
The size of the light concrete blocks is 0.5m long by 0.5m wide by 0.48m high, and the longitudinal and transverse spacing between every two light concrete blocks is 2-3 cm.
4 light concrete cushion blocks are placed on the lower portion of one light concrete block, and the light concrete cushion blocks are placed on the lower portion of the side length inner 1/4 position of the light concrete block on the upper portion; the size of the light concrete cushion block is 0.1m long by 0.1m wide by 0.02-0.03 m high.
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 a UEA swelling agent.
Compared with the prior art, the utility model has the following advantage:
the utility model discloses utilize the lightweight concrete material quality light, high strength, need not the advantage of compaction backfill, and utilize lightweight concrete building block factory building prefabrication, the on-the-spot direct heap constitutes the main part, the gap adopts cast-in-place micro-expansion high mobility mortar material to pour and constitutes overall structure, combine to drawing steel cable system and relevant additional structure, can reduce the additional stress that special area high embankment filled and produced the ground, and through upper and lower position applys prestressing force and guarantees upper portion dynamic stability and overall structure stability, reach the purpose of quick construction simultaneously, do not have cast-in-place lightweight soil heat of hydration, pour high scheduling problem.
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 the utility model discloses a light concrete block construction layout.
In the figure: 1-a gravel cushion layer; 11-lower part; 12-upper part; 2-a concrete base; 3-precast reinforced concrete slab; 4-light concrete building blocks; 5, casting micro-expansion high-fluidity mortar in situ; 6-light concrete cushion block; 7-steel cable sleeve; 8-a steel cord; 91-waterproof geotextile I; 92-waterproof geotextile II; 10 — upper packing layer.
Detailed Description
As shown in fig. 1 and 2, the prefabricated prestressed roadbed structure comprises a gravel cushion layer 1, a concrete base 2, a lightweight concrete block 4, a lightweight concrete cushion block 6 and an upper packing layer 10.
The gravel cushion layer 1 consists of a lower part 11 and an upper part 12; the center of the concrete base 2 is provided with an upper part 12, which is sequentially provided with a plurality of layers of light concrete blocks 4 and an upper packing layer 10; two ends of the concrete base 2 are provided with prefabricated grooves, and reinforced concrete prefabricated plates 3 are embedded in the prefabricated grooves; a plurality of layers of light concrete blocks 4 which are arranged in a staggered manner are arranged between the two reinforced concrete precast slabs 3; a cast-in-situ micro-expansion high-fluidity mortar 5 is arranged between two adjacent lightweight concrete blocks 4; a lightweight concrete cushion block 6 and a steel cable 8 arranged in a steel cable sleeve 7 are respectively arranged between two adjacent layers of lightweight concrete building blocks 4, and two ends of the steel cable 8 are fixed on the reinforced concrete precast slab 3; waterproof geotextile I91 is arranged between the bottommost layer lightweight concrete block 4 and the upper part 12 and between the bottommost layer lightweight concrete block and the concrete base 2; and a waterproof geotextile II 92 is arranged between the topmost light concrete block 4 and the upper packing layer 10.
Wherein: the broken stone cushion layer 1 adopts open-graded broken stones with the grain diameter of 1cm, and the permeability coefficient is more than 0.5 cm/s; the thickness of the lower part 11 is 12-18 cm, and the thickness of the upper part 12 is the same as the height of the concrete base 2.
The distance between the prefabricated groove and the outer boundary of the concrete base 2 plate is not less than 20cm, and the distance between the prefabricated groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm.
The reinforced concrete precast slab 3 is coated with organosilicon waterproof coating, the size of the organosilicon waterproof coating is 1m high by 1m wide by 0.15m thick, the two transverse sides of the organosilicon waterproof coating are grooves, the two longitudinal sides are bulges, and the middle of the organosilicon waterproof coating is provided with anchor cable holes; the anchor cable holes are connected to the wire rope 8.
The waterproof geotextile I91 is fully paved and is higher than the 12 surface of the upper part by more than 10 cm.
The waterproof geotextile II 92 transversely exceeds the lightweight concrete block 4 by at least 0.1 m.
The size of the light concrete blocks 4 is 0.5m long by 0.5m wide by 0.48m high, and the longitudinal and transverse spacing between every two light concrete blocks 4 is 2-3 cm.
4 light concrete cushion blocks 6 are placed at the lower part of one light concrete block 4, and the light concrete cushion blocks 6 are placed at the lower part of 1/4 positions inside the side length of the upper light concrete block 4; the size of the light concrete cushion block 6 is 0.1m long by 0.1m wide by 0.02-0.03 m high.
The design strength of the cast-in-situ micro-expansion high-fluidity mortar 5 is the same as that of the lightweight concrete block 4, 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.
A construction method of an assembled pre-stressed roadbed structure comprises the following steps:
⑴, constructing the lower part 11 of the gravel cushion layer 1 by adopting open-graded gravel with the grain diameter of 1cm and the permeability coefficient of more than 0.5cm/s, wherein the laying thickness is 12-18 cm;
⑵ construction of concrete base 2:
adopting factory building prefabrication manufacturing; two ends of the concrete base 2 are provided with prefabricated grooves, and the center of the concrete base is provided with a groove; the distance between the prefabricated groove and the outer boundary of the concrete base 2 plate is not less than 20cm, and the distance between the prefabricated groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm;
⑶ open-graded broken stones with the grain diameter of 1cm are adopted in the grooves, the permeability coefficient is more than 0.5cm/s, the upper part 12 of the broken stone cushion layer 1 is constructed, and the paving thickness is the same as the height of the concrete base 2;
⑷, paving the waterproof geotextile I91 on the upper part 12 and the concrete base 2 in a full paving mode, wherein the waterproof geotextile I91 is higher than the surface of the upper part 12 by more than 10 cm;
⑸ manufacturing a reinforced concrete precast slab 3 with the size of 1m high, 1m wide and 0.15m thick, wherein, the two transverse sides are grooves, the two longitudinal sides are protrusions, and the middle is provided with an anchor cable hole;
⑹ carrying out construction of the lightweight concrete building block 4:
the lightweight concrete building block 4 is formed by factory prefabrication and maintenance, and the size is 0.5m long by 0.5m wide by 0.48m high; when laying is carried out, the building blocks are constructed in a layered mode and placed in a staggered mode, and the longitudinal and transverse spacing of the building blocks is 2-3 cm; when a smaller-size building block type is needed, the building block type can be obtained by cutting a large building block;
⑺ placing lightweight concrete pad 6:
the light concrete cushion block 6 is formed by cutting the leftover materials of the light concrete blocks 4, the size of the light concrete cushion block is 0.1m long by 0.1m wide by 0.02-0.03 m high, 4 cushion blocks are placed on the lower portion of one block, and the cushion blocks are placed on the lower portion of the position 1/4 in the side length of the upper block;
⑻ placing the cable sleeve 7:
the light concrete cushion blocks 6 are laid simultaneously, and redundant gaps are blocked through anchor cable holes in the reinforced concrete precast slabs 3;
⑼, carrying out cast-in-situ micro-expansion high-fluidity mortar 5 construction according to the designed strength:
firstly, spraying water to the lightweight concrete block 4 to basically ensure that the surface of the block does not absorb water; pouring the upper layer of cement mortar after the initial setting of the lower layer of cement mortar is finished; the construction of the building blocks is not higher than that of the three layers of the pouring surface of the cast-in-situ micro-expansion high-fluidity mortar 5;
⑽, alternately carrying out construction in steps ⑸ - ⑼ according to design requirements until reaching a design elevation;
⑾ laying waterproof geotextile II 92 on the topmost lightweight concrete block 4, and making the geotextile II transversely exceed the lightweight concrete block 4 by at least 0.1m, wherein the lapping mode is the same as that of the waterproof geotextile I91;
⑿ placing the steel cable 8 in the steel cable sleeve 7 and applying prestress while checking the stress relaxation condition periodically;
⒀ the upper packing layer 10 is filled by first spreading and then rolling, and the packing is A, B groups of packing.
Claims (8)
1. An assembled prestressing force road bed structure which characterized in that: the structure comprises a gravel cushion layer (1), a concrete base (2), a lightweight concrete block (4), a lightweight concrete cushion block (6) and an upper packing layer (10); the gravel cushion (1) consists of a lower part (11) and an upper part (12); the upper part (12) is arranged in the center of the concrete base (2), and a plurality of layers of the lightweight concrete building blocks (4) and the upper packing layer (10) are sequentially arranged on the upper part; two ends of the concrete base (2) are provided with prefabricated grooves, and reinforced concrete prefabricated plates (3) are embedded in the prefabricated grooves; a plurality of light concrete blocks (4) which are arranged in a staggered manner are arranged between the two reinforced concrete precast slabs (3); cast-in-place micro-expansion high-fluidity mortar (5) is arranged between two adjacent lightweight concrete blocks (4); the lightweight concrete cushion blocks (6) and the steel cable (8) arranged in the steel cable sleeve (7) are respectively arranged between two adjacent layers of the lightweight concrete building blocks (4), and two ends of the steel cable (8) are fixed on the reinforced concrete precast slab (3); waterproof geotextile I (91) is arranged among the bottommost layer of the lightweight concrete building block (4), the upper part (12) and the concrete base (2); and a waterproof geotextile II (92) is arranged between the top lightweight concrete block (4) and the upper packing layer (10).
2. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the gravel cushion layer (1) adopts open-graded gravel with the grain diameter of 1cm, and the permeability coefficient is more than 0.5 cm/s; the thickness of the lower part (11) is 12-18 cm, and the thickness of the upper part (12) is the same as the height of the concrete base (2).
3. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the distance between the precast groove and the plate outer boundary of the concrete base (2) is not less than 20cm, and the distance between the precast groove and the plate inner boundary is not less than 50 cm; the height is not less than 20 cm.
4. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the reinforced concrete precast slab (3) is coated with organic silicon waterproof paint, the size of the reinforced concrete precast slab is 1m high by 1m wide by 0.15m thick, the two transverse sides of the reinforced concrete precast slab are grooves, the two longitudinal sides of the reinforced concrete precast slab are bulges, and the middle of the reinforced concrete precast slab is provided with an anchor cable hole; the anchor cable holes are connected with the steel cable (8).
5. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the waterproof geotextile I (91) is fully paved and is higher than the surface of the upper part (12) by more than 10 cm.
6. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the waterproof geotextile II (92) transversely exceeds the lightweight concrete building block (4) by at least 0.1 m.
7. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the size of the light concrete blocks (4) is 0.5m long by 0.5m wide by 0.48m high, and the longitudinal and transverse spacing of every two light concrete blocks (4) is 2-3 cm.
8. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: 4 light concrete cushion blocks (6) are placed on the lower portion of one light concrete block (4), and the light concrete cushion blocks (6) are placed on the lower portion of the position 1/4 inside the side length of the light concrete block (4) on the upper portion; the size of the light concrete cushion block (6) is 0.1m long by 0.1m wide by 0.02-0.03 m high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921429924.8U CN210946332U (en) | 2019-08-30 | 2019-08-30 | Assembled prestressing force road bed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921429924.8U CN210946332U (en) | 2019-08-30 | 2019-08-30 | Assembled prestressing force road bed structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210946332U true CN210946332U (en) | 2020-07-07 |
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ID=71388534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921429924.8U Expired - Fee Related CN210946332U (en) | 2019-08-30 | 2019-08-30 | Assembled prestressing force road bed structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210946332U (en) |
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2019
- 2019-08-30 CN CN201921429924.8U patent/CN210946332U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200707 Termination date: 20210830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |