CN212247676U - Structure is rebuild to existing railway roadbed underground drainage system - Google Patents
Structure is rebuild to existing railway roadbed underground drainage system Download PDFInfo
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- CN212247676U CN212247676U CN202020680266.6U CN202020680266U CN212247676U CN 212247676 U CN212247676 U CN 212247676U CN 202020680266 U CN202020680266 U CN 202020680266U CN 212247676 U CN212247676 U CN 212247676U
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- drainage system
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- ditch
- underground drainage
- pipe
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- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000010276 construction Methods 0.000 abstract description 12
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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Abstract
The utility model discloses an existing railway roadbed underground drainage system rebuilds structure, including integral french drain, horizontal drain pipe and a plurality of support tubular column, the other foundation ditch that is equipped with that digs of existing underground drainage system, integral french drain is located the foundation ditch, a plurality of support tubular columns set up in the road bed of foundation ditch both sides along the line direction interval, the drainage face of integral french drain is less than existing underground drainage system's drainage face, horizontal drain pipe is located the foundation bed bottom, the one end of horizontal drain pipe is located the embankment section of embankment below, the other end of horizontal drain pipe is located the foundation ditch. The integral blind ditch can improve the installation speed of the blind ditch and improve the construction efficiency, the drainage surface of the integral blind ditch is lower than that of the existing underground drainage system, so that underground water in the existing underground drainage system can flow into the integral blind ditch and be discharged, the transverse drainage pipe can discharge the underground water permeating into a roadbed filling section, and the plurality of support pipe columns can prevent the roadbed from generating transverse deformation after the excavation of a foundation pit of the underground drainage system reconstruction project.
Description
Technical Field
The utility model relates to a railway and highway traffic civil engineering field, especially an existing railway roadbed underground drainage system rebuilds structure.
Background
In the design of the high-speed railway subgrade in the expansion land area, in order to solve the problem of expansion and contraction deformation of the subgrade caused by the fluctuation of the underground water level, longitudinal drainage blind ditches are generally arranged on two sides of the bottom of the subgrade bed to drain underground water, so that the underground water level of the subgrade base is reduced, and the stability of the subgrade can meet the operation requirement of a high-speed railway train.
The importance of the longitudinal blind ditches of the subgrade base in the high-speed railway subgrade engineering in the expansive soil area is fully recognized and determined by the industry, and the longitudinal blind ditches are widely applied to the high-speed railway subgrade in the expansive soil area. Once the longitudinal blind ditch fails, large-area water accumulation of a foundation is caused, the strength is greatly reduced, the roadbed sinks and extrudes outwards, the line is deformed and deformed, the ballast bed is turned over and the mud is blown out, and other diseases seriously threaten the driving safety of the high-speed railway, so that the longitudinal blind ditch which fails is restored and rebuilt in time to ensure the smoothness of underground drainage. The reconstruction of the underground drainage system of the existing high-speed railway subgrade needs to solve the following problems because of being close to the operation railway:
firstly, the reconstruction project is close to an operation station track, and large transverse deformation is not allowed in foundation pit excavation; secondly, the construction site is narrow, and large-scale equipment is avoided as much as possible; thirdly, the process is simple, the efficiency is high, and the influence time of the reconstruction project on the operation of the high-speed railway is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems of large water collection on the ground surface of a plain area and easy sedimentation in the prior art, the reconstruction structure of the underground drainage system of the existing railway subgrade is provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
a reconstruction structure of an existing railway roadbed underground drainage system comprises an integral blind ditch transverse drainage pipe and a plurality of supporting pipe columns;
a foundation pit is dug beside the existing underground drainage system, and the integral blind ditch is positioned in the foundation pit;
a plurality of supporting pipe columns are arranged in the roadbed at two sides of the foundation pit at intervals along the line direction;
the drainage surface of the integral blind ditch is lower than that of the existing underground drainage system;
the horizontal drain pipe is located the foundation bed bottom, and the one end of horizontal drain pipe is arranged in the fill area section of embankment below, and the other end of horizontal drain pipe is located the foundation ditch.
Through the structure, the integral blind ditch can improve the installation speed of the blind ditch, the construction process is reduced, the construction efficiency is improved, the influence time of the reconstruction engineering on the operation of the high-speed railway is shortened, the integral blind ditch is installed beside the existing underground drainage system, the drainage surface of the integral blind ditch is lower than that of the existing underground drainage system, the underground water in the existing underground drainage system can flow into the integral blind ditch and be discharged, the transverse drainage pipe is communicated with the roadbed filling section and the foundation pit, the underground water permeating the roadbed filling section can be discharged, the plurality of supporting pipe columns are arranged in the roadbed at two sides of the foundation pit, the roadbed after the foundation pit excavation of the underground drainage system reconstruction engineering can be prevented from generating transverse deformation, the operation safety of a high-speed train is influenced, and the stability and the safety of the operation high-speed train are ensured.
As the utility model discloses a preferred scheme, the one end that horizontal drain pipe is located the square filling section is higher than the other end that horizontal drain pipe is located integral french drain. Through the structure, the underground water permeating into the roadbed filling section can flow into the integral blind ditch along the transverse drainage pipe under the influence of the self gravity and is discharged.
As the preferred scheme of the utility model, the filler has been pour to no pressure in the support tubular column. Through above-mentioned structure, the support tubular column can not extract after whole rebuild engineering is accomplished, pours the filler and can ensure that support tubular column durability meets the demands, has increased the lateral stiffness of support tubular column simultaneously, has strengthened the ability of resisting transverse deformation, and no pressure slip casting can prevent to block up the drainage channel of groundwater after the thick liquid diffusion.
As the preferred scheme of the utility model, the support tubular column is seamless steel floral tube, and the filler includes cement paste or mortar.
As the utility model discloses an optimal scheme still includes the side ditch platform, and the side ditch platform is located the top of foundation ditch, is equipped with on the side ditch platform and connects the stubble reinforcing bar, connects the stubble reinforcing bar to be located the seam crossing of side ditch platform and existing side ditch platform, connects the stubble reinforcing bar to be used for connecting side ditch platform and existing side ditch platform. Through the structure, the effective connection between the side ditch platform and the existing side ditch platform is ensured by the stubble connecting reinforcing steel bars.
As the utility model discloses an optimal selection scheme is equipped with a plurality of stull in the foundation ditch, and a plurality of stulls way direction in bank along the line sets up. Through above-mentioned structure, ensure the wholeness of road bed, prevent that both sides road bed warp to the foundation ditch center.
As the utility model discloses an optimal selection scheme, the integral french drain top has been pour and has been had no sand concrete. Through above-mentioned structure, no sand concrete water permeability is good, need not compaction equipment and carries out the compaction to it, ensures that groundwater is discharged through the integral french drain of foundation ditch bottom.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the integral blind ditch can improve the installation speed of the blind ditch, reduces the construction process, improves the construction efficiency, shortens the influence time of reconstruction engineering on the operation of a high-speed railway, installs the integral blind ditch beside an existing underground drainage system, enables underground water in the existing underground drainage system to flow into the integral blind ditch and be discharged when the drainage surface of the integral blind ditch is lower than the drainage surface of the existing underground drainage system, and enables the underground water to be discharged, a transverse drainage pipe to be communicated with a roadbed filling section and a foundation pit and can discharge the underground water permeating into the roadbed filling section.
Drawings
Fig. 1 is a schematic cross-sectional view of a reconstruction structure of an existing railway roadbed underground drainage system.
Fig. 2 is a partially enlarged view of the area a in fig. 1.
Icon: 1-existing underground drainage systems; 2-supporting the tubular pile; 3-integral blind ditch; 4-sand free concrete; 5-horizontal bracing; 6-side trench platform; 7-connecting reinforcing steel bars; 8-transverse drain pipe.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Examples
As shown in fig. 1-2, the present embodiment provides a reconstruction structure of an existing railway roadbed underground drainage system, which comprises an integrated blind ditch 3, a transverse drainage pipe 8, a support pipe column 2, a cross brace 5 and a side ditch platform 6;
two rows of supporting tubular columns 2 are arranged beside the side wall of a ditch at the cutting toe of an existing line, the two rows of supporting tubular columns 2 are arranged at intervals along the line direction, no pressure is filled in the supporting tubular columns 2, specifically, the distance between the two rows of supporting tubular columns 2 arranged along the line direction is 0.3-0.5m, the length of the supporting tubular columns 2 is 4-6m, the supporting tubular columns 2 generally adopt seamless steel flower tubes, and the filler comprises cement paste or mortar.
The lateral ditch platform 6 is located at the top of the foundation pit, the lateral ditch platform 6 is provided with stubble connecting reinforcing steel bars 7, the stubble connecting reinforcing steel bars 7 are fixedly arranged at the joint of the lateral ditch platform 6 and the existing lateral ditch platform, the stubble connecting reinforcing steel bars 7 are used for connecting the lateral ditch platform 6 and the existing lateral ditch platform, and concrete is poured on the lateral ditch platform 6.
The foundation pit is internally provided with a plurality of cross braces 5, the cross braces 5 are arranged in rows at intervals along the line direction, specifically, the distance between the cross braces 5 arranged along the line direction is 2-4m, and the cross braces 5 can be made of I-shaped steel or section steel.
A foundation pit is dug beside the existing underground drainage system 1, mortar is used for plastering and leveling in the foundation pit, the integral blind ditch 3 is installed at the bottom of the foundation pit, the drainage surface of the integral blind ditch 3 is lower than that of the existing underground drainage system 1, and specifically, the drainage surface of the integral blind ditch 3 is lower than that of the existing underground drainage system 1 by at least 0.5 m.
The transverse drain pipe 8 is arranged at the bottom of the foundation bed, one end of the transverse drain pipe 8 is located in the filling section below the embankment, the other end of the transverse drain pipe 8 is located in the foundation pit, one end, located in the filling section, of the transverse drain pipe 8 is higher than the other end, located in the integral blind ditch 3, of the transverse drain pipe 8, and specifically, an included angle formed between an axis of one end, located in the filling section, of the transverse drain pipe 8 and an axis of the other end, located in the integral blind ditch 3, of the transverse drain pipe 8 is 20-45 degrees.
And (3) pouring the sand-free concrete 4 in the foundation pit, specifically pouring the sand-free concrete 4 to 0.2-0.3m of the bottom of the side ditch platform 6.
The embodiment also provides a construction method for the reconstruction structure of the underground drainage system of the existing railway subgrade, which comprises the following steps:
s1: cutting the side ditch platform 6;
specifically, the side ditch platform 6 is cut according to the transverse size of the foundation pit;
s2: drilling a supporting pipe column 2;
specifically, an anchor rod drilling machine, a down-the-hole drilling machine or a geological drilling machine is adopted to drill a supporting pipe column 2;
s3: placing the support pipe column 2 in the drill hole, and then pouring a filler in the support pipe column 2;
specifically, the support pipe column 2 is placed immediately after drilling, and cement mortar or clean slurry is poured into the pipe;
s4: excavating a foundation pit;
specifically, after the supporting pipe columns 2 along the line direction are completely constructed, a small excavator or a worker is used for excavating the foundation pit;
s5: installing a cross brace 5;
specifically, when the foundation pit is excavated to about 1m depth, a cross brace 5 is installed;
s6: excavating a foundation pit to a designed bottom surface elevation;
s7: installing an integral blind ditch 3 and a transverse drain pipe 8;
specifically, removing the virtual slag at the bottom of the foundation pit, plastering and leveling cement mortar, and installing the integral blind ditch 3 and the transverse drain pipe 8;
s8: pouring the sand-free concrete 4 in situ to the position below the side ditch platform 6;
specifically, the sand-free concrete is cast in situ 4 to 0.2-0.3m below the side ditch platform 6;
s9: arranging a connecting steel bar 7;
specifically, the cutting surface of the existing side ditch platform is cleaned up, chiseled, the connecting reinforcing steel bars 7 are arranged, then concrete is cast in situ, and the concrete sealing of the side ditch platform 6 is recovered.
The existing railway roadbed underground drainage system reconstruction structure and the construction method provided by the embodiment have the beneficial effects that:
the integral type blind ditch 3 can improve the installation speed of the blind ditch, reduce the construction process, improve the construction efficiency, shorten the influence time of reconstruction engineering on the operation of a high-speed railway, the integral type blind ditch 3 is installed beside the existing underground drainage system 1, the drainage surface of the integral type blind ditch 3 is lower than that of the existing underground drainage system 1, so that underground water in the existing underground drainage system 1 can flow into the integral type blind ditch 3 and be discharged, the transverse drainage pipe 8 is communicated with a roadbed filling section and a foundation pit, so that the underground water permeating into the roadbed filling section can be discharged, and the plurality of supporting pipe columns 2 are arranged in the roadbed at two sides of the foundation pit, so that the roadbed of the underground drainage system reconstruction engineering can be prevented from generating transverse deformation after the excavation of the foundation pit, the operation safety of the high-speed train is influenced, and the stability and the safety of the operation of;
the stubbled steel bars 7 ensure the effective connection between the side ditch platform 6 and the existing side ditch platform;
the support pipe column 2 cannot be pulled out after the whole reconstruction project is completed, the pouring of the filler can ensure that the durability of the support pipe column 2 meets the requirement, the transverse rigidity of the support pipe column 2 is increased, the capability of resisting transverse deformation is enhanced, and no-pressure grouting can prevent slurry from blocking a drainage channel of underground water after the slurry is diffused;
one end of the transverse drainage pipe 8 positioned at the filling section is higher than the other end of the transverse drainage pipe 8 positioned at the integral blind ditch 3, so that the underground water permeating into the roadbed filling section can flow into the integral blind ditch 3 along the transverse drainage pipe 8 under the influence of self gravity and be discharged;
the cross braces 5 ensure the integrity of the roadbed and prevent the roadbed on the two sides from deforming towards the center of the foundation pit;
the sand-free concrete 4 has good water permeability, and is not required to be compacted by compacting equipment, so that underground water is ensured to be discharged through the integral blind ditch 3 at the bottom of the foundation pit;
the construction method ensures the effective realization of the function of the reconstruction technology of the underground drainage system, has simple construction process, can be used for both expansive soil areas and high-speed and common-speed railway roadbed engineering in other underground water development areas.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A reconstruction structure of an existing railway subgrade underground drainage system is characterized by comprising an integral blind ditch (3), a transverse drainage pipe (8) and a plurality of supporting pipe columns (2);
a foundation pit is dug beside the existing underground drainage system (1), and the integral blind ditch (3) is positioned in the foundation pit;
the supporting pipe columns (2) are arranged in the roadbed at two sides of the foundation pit at intervals along the line direction;
the drainage surface of the integral blind ditch (3) is lower than that of the existing underground drainage system (1);
the transverse drain pipe (8) is located at the bottom of the foundation bed, one end of the transverse drain pipe (8) is located in the filling section below the embankment, and the other end of the transverse drain pipe (8) is located in the foundation pit.
2. An existing railway roadbed underground drainage system reconstruction structure according to claim 1, characterized in that one end of the lateral drainage pipe (8) is located at the fill section higher than one end of the lateral drainage pipe (8) located in the foundation pit.
3. An existing railway roadbed underground drainage system reconstruction structure according to claim 1, characterized in that the support pipe column (2) is cast without pressure with filler.
4. An existing railway roadbed underground drainage system reconstruction structure according to claim 3, wherein the support pipe column (2) is a seamless steel perforated pipe, and the filler comprises cement paste or mortar.
5. An existing railway roadbed underground drainage system reconstruction structure according to claim 1, characterized by further comprising a side ditch platform (6), wherein the side ditch platform (6) is positioned at the top of the foundation pit, the side ditch platform (6) is provided with connecting reinforcing steel bars (7), the connecting reinforcing steel bars (7) are positioned at the joint of the side ditch platform (6) and the existing side ditch platform, and the connecting reinforcing steel bars (7) are used for connecting the side ditch platform (6) and the existing side ditch platform.
6. An existing railway roadbed underground drainage system reconstruction structure according to claim 1, wherein a plurality of cross braces (5) are arranged in the foundation pit, and the cross braces (5) are arranged in a row along the direction of the railway.
7. An existing railway roadbed underground drainage system reconstruction structure according to claim 1, wherein the integral blind ditch (3) is cast with sand-free concrete (4) above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020680266.6U CN212247676U (en) | 2020-04-28 | 2020-04-28 | Structure is rebuild to existing railway roadbed underground drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020680266.6U CN212247676U (en) | 2020-04-28 | 2020-04-28 | Structure is rebuild to existing railway roadbed underground drainage system |
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| Publication Number | Publication Date |
|---|---|
| CN212247676U true CN212247676U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020680266.6U Expired - Fee Related CN212247676U (en) | 2020-04-28 | 2020-04-28 | Structure is rebuild to existing railway roadbed underground drainage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395066A (en) * | 2020-04-28 | 2020-07-10 | 中铁二院工程集团有限责任公司 | Reconstruction structure and construction method for existing railway roadbed underground drainage system |
-
2020
- 2020-04-28 CN CN202020680266.6U patent/CN212247676U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395066A (en) * | 2020-04-28 | 2020-07-10 | 中铁二院工程集团有限责任公司 | Reconstruction structure and construction method for existing railway roadbed underground drainage system |
| CN111395066B (en) * | 2020-04-28 | 2024-07-12 | 中铁二院工程集团有限责任公司 | Reconstruction structure and construction method of existing railway subgrade underground drainage system |
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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: 20201229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |