CN212404681U - Self-compaction cement soil spliced wide roadbed - Google Patents
Self-compaction cement soil spliced wide roadbed Download PDFInfo
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- CN212404681U CN212404681U CN202021499091.5U CN202021499091U CN212404681U CN 212404681 U CN212404681 U CN 212404681U CN 202021499091 U CN202021499091 U CN 202021499091U CN 212404681 U CN212404681 U CN 212404681U
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- roadbed
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- widened
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- 239000002689 soil Substances 0.000 title claims abstract description 48
- 239000004568 cement Substances 0.000 title claims abstract description 34
- 238000005056 compaction Methods 0.000 title description 8
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 abstract description 15
- 238000009412 basement excavation Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model provides a self-compacting cement soil wide-spliced roadbed, which comprises an old roadbed, a new roadbed, a throttling block wall body and a roadbed surface layer; the edge of one side to be widened of the cross section of the old roadbed is step-shaped; the throttling block wall body is laid on one side of the old roadbed to be widened; the new roadbed is self-compacting cement soil filled between the side to be widened of the old roadbed and the throttling block wall body; the roadbed surface layer is laid on the top end surfaces of the old roadbed and the new roadbed; and top three-way geogrids are arranged between the top end surfaces of the old roadbed and the new roadbed and the roadbed surface layer. The utility model has the advantages that the connection between the edge of the old roadbed and the new roadbed is firmer, and the uneven settlement of the old roadbed and the new roadbed is prevented; reasonably utilizes the excavation waste soil and the engineering waste soil, and has high resource efficiency and environmental friendliness.
Description
Technical Field
The utility model belongs to the technical field of the geotechnical engineering technique and specifically relates to a wide road bed is pieced together to self-compaction cement soil.
Background
The disposal of the engineering spoil lacks planning and implementation plans, which not only results in waste of land resources, but also results in waste of transportation and storage costs. Therefore, the diversified waste soil digestion mode needs to be improved and innovated urgently, and the waste soil is taken as a resource to be fully and effectively utilized. The self-dense cement soil is a backfill reinforcing material with fluidity formed by mixing engineering waste soil with a certain proportion of curing agent and cement and fully stirring the mixture by a special machine. Has been widely applied to soft soil foundation treatment engineering.
However, in the filling engineering of subgrade widening and the like, the backfill quality is not easy to control, and the popularization and the application are difficult.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a self-compacting cement soil widening roadbed, which has firmer connection between the edge of the old roadbed and the new roadbed and prevents the uneven settlement of the old roadbed and the new roadbed; reasonably utilizes the excavation waste soil and the engineering waste soil, and has high resource efficiency and environmental friendliness.
The technical scheme is as follows: the utility model provides a self-compacting cement soil wide-spliced roadbed, which comprises an old roadbed, a new roadbed, a throttling block wall body and a roadbed surface layer; the edge of one side to be widened of the cross section of the old roadbed is step-shaped; the throttling block wall body is laid on one side of the old roadbed to be widened; the new roadbed is self-compacting cement soil filled between the side to be widened of the old roadbed and the throttling block wall body;
the roadbed surface layer is laid on the top end surfaces of the old roadbed and the new roadbed; and top three-way geogrids are arranged between the top end surfaces of the old roadbed and the new roadbed and the roadbed surface layer.
Furthermore, a middle three-way geogrid is arranged on the horizontal end face of the step on the side, to be widened, of at least one old roadbed; the middle three-way geogrid extends and is buried in the new roadbed.
Further, the water draining device also comprises a water draining unit; the drainage unit comprises a plurality of sand and stone drainage channels and a plurality of drainage pipes; the sand and stone drainage channels are arranged at the splicing positions of the old roadbed and the new roadbed; each sandstone drainage channel extends from the top to the bottom of the old roadbed; the drain pipe is pre-buried at the bottom of the new roadbed; one end of each drain pipe is communicated with the bottom of one gravel drainage channel, and the other end of each drain pipe is communicated to the outside of the new roadbed.
A construction method of self-compacting cement soil in a roadbed widening project comprises the following steps
S1, removing an asphalt layer from the old roadbed, downwards excavating a certain depth from the earth surface at the side, to be widened, of the old roadbed, and excavating the edge of the side, to be widened, of the old roadbed into a step shape;
s2, arranging a plurality of sand-stone drainage channels on the step on the side to be widened of the old roadbed; each sandstone drainage channel extends from the top to the bottom of the old roadbed;
s3, reserving a plurality of drainage pipes at the bottom of the area where the new roadbed is located, wherein one end of each drainage pipe is communicated with the bottom of one sandstone drainage channel, and the other end of each drainage pipe is communicated with the outside of the new roadbed;
s4, building blocks according to the designed slope rate, filling self-compacting cement soil between the built blocks and the side to be widened of the old roadbed after the building blocks are built to a certain depth, and restraining the self-compacting cement soil from being lost to the outside by the built blocks so as to realize the effect of intercepting; the construction is repeated to the top of the old roadbed;
and S5, paving top three-way geogrids on the top end faces of the old roadbed and the new roadbed, and filling self-compacting cement soil above the top three-way geogrids to form a roadbed surface layer.
The self-compacting cement soil in the step S4 is prepared by mixing the excavation waste soil, the engineering waste soil, the cement and the curing agent through automatic mechanical equipment.
In step S4, when the building blocks are stacked to the depth of the middle three-way geogrid, self-compacting cement soil is filled between the stacked building blocks and the side to be widened of the old roadbed, and then the middle three-way geogrid is laid on the horizontal end face of the step to be corresponding to the old roadbed and the self-compacting cement soil.
Has the advantages that: the utility model discloses the step form edge of well old road bed has increased the edge of old road bed and the area of contact of the self-compaction cement soil of new road bed for the edge of old road bed and the self-compaction cement soil of new road bed form the atress contact surface of two directions at horizontal direction and vertical direction, and the edge of old road bed is more firm with being connected of new road bed.
The top three-way geogrid can prevent the uneven settlement of the old roadbed and the new roadbed; in addition, the step-shaped edge of the old roadbed enables a middle three-way geogrid to be arranged between the middle of the old roadbed and the new roadbed, and uneven settlement of the old roadbed and the new roadbed is further prevented.
The drainage unit can drain water at the joint of the old roadbed and the new roadbed in time, so that the old roadbed and the new roadbed are prevented from being separated and damaged by water.
The self-compacting cement soil stirring device has good fluidity at the initial stirring stage, integrates stirring and pouring on site, does not need rolling during construction, has high construction speed and has the characteristic of self-sealing property; the excavation waste soil and the engineering waste soil are reasonably utilized, the material has high resource efficiency and environmental friendliness, can be cured in a short time, has high early strength, and the cured material has high bearing capacity and deformation resistance.
The utility model discloses a throttle block wall can retrain self-compaction soil cement in appointed filling within range, has improved the factor of safety of side slope of road bed simultaneously.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of the present invention;
fig. 2 is a side view of the new roadbed of the present invention;
fig. 3 is a schematic structural view of a geogrid of a triangular braided structure;
fig. 4 is a schematic view of a geogrid structure of a square braid structure;
fig. 5 is a schematic view of a geogrid structure of a rectangular woven structure.
Detailed Description
As shown in fig. 1 and fig. 2, the utility model provides a self-compacting cement soil widening roadbed, which comprises an old roadbed 1, a new roadbed 2, a throttling block wall body 3, a roadbed surface layer 4 and a drainage unit; the edge of one side to be widened of the cross section of the old roadbed 1 is step-shaped; the throttling block wall 3 is laid on one side to be widened of the old roadbed 1; the new roadbed 2 is self-compacting cement soil filled between the side to be widened of the old roadbed 1 and the throttling block wall body 3. The step form edge of old road bed 1 has increased the area of contact of the edge of old road bed 1 and the self-compaction soil cement of new road bed 2 for the edge of old road bed 1 and the self-compaction soil cement of new road bed 2 form the atress contact surface of two directions in horizontal direction and vertical direction, and the edge of old road bed 1 is connected more firmly with new road bed 2.
The roadbed surface layer 4 is laid on the top end surfaces of the old roadbed 1 and the new roadbed 2; a top three-way geogrid 501 is arranged between the top end faces of the old roadbed 1 and the new roadbed 2 and the roadbed surface layer 4, and the top three-way geogrid 501 can prevent the uneven settlement of the old roadbed 1 and the new roadbed 2.
The drainage unit comprises a plurality of sand drainage channels 601 and a plurality of drainage pipes 602; the sand drainage channels 601 are arranged at the splicing positions of the old roadbed 1 and the new roadbed 2; each sandstone drainage channel 601 extends from the top to the bottom of the old roadbed 1; the drain pipe 602 is pre-buried at the bottom of the new roadbed 2; one end of each drain pipe 602 is communicated with the bottom of one sand drain channel 601, and the other end of each drain pipe 602 is communicated to the outside of the new roadbed 2.
The step-shaped edge of the old roadbed 1 enables a middle three-way geogrid 502 to be arranged between the middle part of the old roadbed 1 and the new roadbed 2, and further prevents the uneven settlement of the old roadbed 1 and the new roadbed 2. Preferably, a middle three-way geogrid 502 is arranged on the horizontal end face of each step on the side to be widened of the old roadbed 1; the middle three-way geogrid 502 extends and is buried in the new roadbed 2.
The top three-way geogrid 501 and the middle three-way geogrid 502 can be of a triangular woven structure as shown in fig. 3, or of a square woven structure as shown in fig. 4, or of a rectangular woven structure as shown in fig. 5.
A construction method of self-compacting cement soil in a roadbed widening project comprises the following steps:
s1, removing an asphalt layer from the old roadbed 1, excavating a certain depth downwards from the earth surface at the side, to be widened, of the old roadbed 1, and excavating the edge of the side, to be widened, of the old roadbed 1 into a step shape;
s2, arranging a plurality of sand drainage channels 601 on the step on the side to be widened of the old roadbed 1; each sandstone drainage channel 601 extends from the top to the bottom of the old roadbed 1;
s3, reserving a plurality of drainage pipes 602 at the bottom of the area where the new roadbed 2 is located, wherein one end of each drainage pipe 602 is communicated with the bottom of one gravel drainage channel 601, and the other end of each drainage pipe 602 is communicated with the outside of the new roadbed 2;
s4, building blocks according to the designed slope rate, and filling self-compacting cement soil between the built blocks and the side to be widened of the old roadbed 1 after the building blocks are stacked to a certain depth; constructing to the top of the old roadbed 1 in a reciprocating way; the self-compacting cement soil is prepared by mixing excavation waste soil, engineering waste soil, cement and a curing agent through automatic mechanical equipment;
when the building blocks are piled to the depth of the middle three-way geogrid 502, self-compacting cement soil is filled between the piled building blocks and the side to be widened of the old roadbed 1, and then the middle three-way geogrid 502 is paved on the horizontal end face of the step to be corresponding to the old roadbed 1 and the self-compacting cement soil
And S5, paving a top three-way geogrid 501 on the top end faces of the old roadbed 1 and the new roadbed 2, and filling self-compacting cement soil above the top three-way geogrid 501 to form a roadbed surface layer 4.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021499091.5U CN212404681U (en) | 2020-07-27 | 2020-07-27 | Self-compaction cement soil spliced wide roadbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021499091.5U CN212404681U (en) | 2020-07-27 | 2020-07-27 | Self-compaction cement soil spliced wide roadbed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212404681U true CN212404681U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021499091.5U Expired - Fee Related CN212404681U (en) | 2020-07-27 | 2020-07-27 | Self-compaction cement soil spliced wide roadbed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212404681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851185A (en) * | 2020-07-27 | 2020-10-30 | 河海大学 | Self-compacting cement soil widening roadbed and construction method |
-
2020
- 2020-07-27 CN CN202021499091.5U patent/CN212404681U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851185A (en) * | 2020-07-27 | 2020-10-30 | 河海大学 | Self-compacting cement soil widening roadbed and construction method |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20210126 |