CN214271529U - Foam concrete light roadbed structure above subway tunnel - Google Patents
Foam concrete light roadbed structure above subway tunnel Download PDFInfo
- Publication number
- CN214271529U CN214271529U CN202022412592.1U CN202022412592U CN214271529U CN 214271529 U CN214271529 U CN 214271529U CN 202022412592 U CN202022412592 U CN 202022412592U CN 214271529 U CN214271529 U CN 214271529U
- Authority
- CN
- China
- Prior art keywords
- foam concrete
- laid
- roadbed structure
- subway tunnel
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011381 foam concrete Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000004746 geotextile Substances 0.000 claims description 17
- 239000004575 stone Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 19
- 238000010276 construction Methods 0.000 description 7
- 239000002689 soil Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000012237 artificial material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Abstract
The utility model discloses a subway tunnel top foam concrete light roadbed structure, including the prefilled region, the level of having laid on the regional basement of prefilled rubble, prevention of seepage geotechnological cloth is laid in level and is joined in marriage the rubble top, prevention of seepage geotechnological cloth upper berth is equipped with foam concrete, foam concrete is the layering method and pours the layer, the layering method is poured the layer thickness and is laid the reinforcing bar net piece 30-60 centimetres and above that, two adjacent overlap joint widths of prevention of seepage geotechnological cloth are greater than or equal to 50 centimetres, the reinforcing bar net piece adopts zinc-coated metal mesh, and the overlap joint width of adjacent metal mesh is not less than 10 centimetres. The utility model discloses use foam concrete to pour the material as main, pour the layer through the layering method and fill roadbed structure with reinforcing bar net piece collocation, guarantee to fill the stability of regional structure.
Description
The technical field is as follows:
the utility model relates to a light roadbed structure field on subway tunnel especially relates to a light roadbed structure of subway tunnel top foam concrete.
Background art:
compared with a ground structure, the underground structure has the advantages that the engineering safety problem is more hidden, the repairing difficulty is higher, and the related engineering construction close to the operation of the subway shield tunnel is strictly controlled and restricted. Meanwhile, with the continuous increase of urban ground traffic demands, the grade of urban roads is continuously improved, and the road networks are also more and more dense, so that more and more road sections overlapped with the running subway shield tunnel are bound to be arranged. The load of conventional road structure layer often can exceed former earthing load, produces additional stress to operation subway shield tunnel, arouses the settlement of tunnel interval, influences operation subway shield tunnel structure's stability and safety.
The foam concrete (also called as bubble mixed light soil) is a light artificial material with good integrity and convenient construction, and the required raw materials are water, cement and foaming agent. In recent years, a new road structure type using cast-in-place foam concrete as a light roadbed is widely used. And replacing and filling the roadbed by adopting the foam concrete structure layer so as to reduce the load effect on the running subway shield tunnel.
The utility model has the following contents:
the utility model discloses use foam concrete to pour the material as main, pour the layer through the layering method and fill roadbed structure with reinforcing bar net piece collocation, guarantee to fill the stability of regional structure.
The technical scheme is adopted for carrying out;
a foam concrete light roadbed structure above a subway tunnel comprises a pre-filling area and is characterized in that graded broken stones are laid on a substrate of the pre-filling area, impermeable geotextile is laid above the graded broken stones, foam concrete is laid on the impermeable geotextile, the foam concrete is a layered method pouring layer, the thickness of the layered method pouring layer is 30-60 cm, and a reinforcing mesh is laid on the layered method pouring layer.
According to a further technical scheme, the lap joint width of two adjacent pieces of the anti-seepage geotextile is more than or equal to 50 cm.
According to a further technical scheme, the steel bar mesh is a galvanized metal mesh, and the lap joint width of adjacent metal meshes is not less than 10 cm.
The utility model has the advantages that:
the light roadbed structure enables the additional stress generated by roadbed filling of the rail-related section to the running subway shield tunnel to be smaller than the numerical value required by a track department, improves the safety of roadbed construction above the running subway shield tunnel, greatly shortens the construction operation period compared with the traditional lime soil roadbed structure, and reduces the additional stress generated by roadbed filling to the running subway shield tunnel; the graded broken stone is paved on the substrate to serve as a lower cushion layer, the anti-seepage geotextile is required to be fully paved on the lower cushion layer, the two lapping widths of the geotextile are larger than or equal to 50cm, the limitation of the lapping widths ensures that the anti-seepage geotextile is tightly combined, the foam concrete is paved on the anti-seepage geotextile and is a layering method pouring layer, the layering method pouring layer is 30-60 cm thick, and a reinforcing mesh is paved on the layering method pouring layer, the foam concrete pouring is too thick, so that bubbles of the foam concrete at the lower part can be compressed, and the single-layer foam concrete is too thin, so that the integrity is poor.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1 subway tunnel, 2 foam concrete, 3 reinforcing bar net pieces, 4 anti-seepage geotextiles and 5 graded broken stones.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, the following technical solutions are adopted in the present embodiment: a foam concrete light roadbed structure above a subway tunnel comprises a prefilled area, wherein the prefilled area needs to be excavated by an excavator, the bottom of a foundation pit in a construction area is cleaned, the bottom of the pit is free from oil stains, floating slurry, residual ash, sundries and the like during pouring, and the bearing capacity of a foundation of a substrate is not less than 130 kPa.
The prefabricated building comprises a pre-filled area, graded broken stones 5 are laid on a substrate of the pre-filled area, impermeable geotextile 4 is laid above the graded broken stones 5, foam concrete 2 is laid on the impermeable geotextile 4, the foam concrete 2 is a layering method pouring layer, the thickness of the layering method pouring layer is 30-60 cm, and reinforcing mesh pieces 3 are laid on the layering method pouring layer.
The utility model discloses in, two adjacent overlap joint widths of prevention of seepage geotechnological cloth 4 are more than or equal to 50 centimetres.
The utility model discloses in, reinforcing bar net piece 3 adopts the zinc-plated metal mesh, and the overlap joint width of adjacent metal mesh is not less than 10 centimetres.
Example 1;
referring to fig. 1, the utility model discloses set up the filling area in subway tunnel 1 top, the vertical thickness of filling can adjust because of the difference in highway section, pours the number of piles and also can change thereupon. When pouring, the filling area can be divided into a plurality of blocks, the blocks are poured respectively, the pouring mode adopts the diagonal pouring of the shape like the Chinese character 'pin',
the light roadbed structure enables the additional stress generated by roadbed filling of the rail-related section to the running subway tunnel 1 to be smaller than the numerical value required by a rail department, improves the safety of roadbed construction above the running subway shield tunnel, greatly shortens the construction operation period compared with the traditional lime soil roadbed structure, and reduces the additional stress generated by roadbed filling to the running subway shield tunnel; the graded broken stone is paved on the substrate to serve as a lower cushion layer, the anti-seepage geotextile is required to be fully paved on the lower cushion layer, the two lapping widths of the geotextile are larger than or equal to 50cm, the limitation of the lapping widths ensures that the anti-seepage geotextile is tightly combined, the foam concrete is paved on the anti-seepage geotextile and is a layering method pouring layer, the layering method pouring layer is 30-60 cm thick, and a reinforcing mesh is paved on the layering method pouring layer, the foam concrete pouring is too thick, so that bubbles of the foam concrete at the lower part can be compressed, and the single-layer foam concrete is too thin, so that the integrity is poor. The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A foam concrete light roadbed structure above a subway tunnel comprises a pre-filling area and is characterized in that graded broken stones are laid on a substrate of the pre-filling area, impermeable geotextile is laid above the graded broken stones, foam concrete is laid on the impermeable geotextile, the foam concrete is a layered method pouring layer, the thickness of the layered method pouring layer is 30-60 cm, and a reinforcing mesh is laid on the layered method pouring layer.
2. The foam concrete lightweight roadbed structure above the subway tunnel according to claim 1, wherein the adjacent two overlapping widths of the anti-seepage geotextile are more than or equal to 50 cm.
3. The foam concrete lightweight roadbed structure above the subway tunnel according to claim 1, wherein the steel mesh sheets are galvanized metal meshes, and the overlapping width of the adjacent metal meshes is not less than 10 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022412592.1U CN214271529U (en) | 2020-10-27 | 2020-10-27 | Foam concrete light roadbed structure above subway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022412592.1U CN214271529U (en) | 2020-10-27 | 2020-10-27 | Foam concrete light roadbed structure above subway tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214271529U true CN214271529U (en) | 2021-09-24 |
Family
ID=77772713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022412592.1U Active CN214271529U (en) | 2020-10-27 | 2020-10-27 | Foam concrete light roadbed structure above subway tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214271529U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855520A (en) * | 2022-06-14 | 2022-08-05 | 保利长大工程有限公司 | Roadbed section replacement method based on foamed lightweight concrete |
-
2020
- 2020-10-27 CN CN202022412592.1U patent/CN214271529U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855520A (en) * | 2022-06-14 | 2022-08-05 | 保利长大工程有限公司 | Roadbed section replacement method based on foamed lightweight concrete |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100510278C (en) | Ecological protection method for sand-filling road foundation hollow block | |
| CN103334357B (en) | Viaduct road embankment structure with lower pile foundation bearing platform extending in roadbed, and construction method | |
| CN104120686B (en) | A kind of high-elastic die-cushion A seating compound dam | |
| CN108797249A (en) | The construction method of soft soil roadbed high roadbed steep slope road section Foam lightweight soil | |
| CN206902488U (en) | A kind of soft soil foundation high-filled embankment of effectively control settlement after construction | |
| CN102704364B (en) | Clay serging tailings subgrade structure and construction method thereof | |
| CN109914173A (en) | Foam lightweight soil pours platform back structure and its construction method in Expressway Extension Project | |
| CN109750571A (en) | A kind of road landslide emergency and permanent supporting and retaining system integral structure and construction method | |
| CN107700299B (en) | Overpass lower-layer ground road structure and construction method thereof | |
| CN110056000B (en) | Construction method and structure of counter weight type retaining wall | |
| CN214271529U (en) | Foam concrete light roadbed structure above subway tunnel | |
| CN210529400U (en) | Solidified building residue soil road structure | |
| CN109537389B (en) | EPS (expandable polystyrene) lower embankment structure and construction method thereof | |
| CN209039963U (en) | A kind of platform back preventing car jump between high road bed and bridge | |
| CN212895900U (en) | Gravity type U-shaped abutment rear drainage structure | |
| CN204551521U (en) | The cast-in-place construction structure of board wall between a kind of antislide pile stake | |
| CN111576118A (en) | Down-through type road culvert transition section foam light soil roadbed structure and construction method thereof | |
| CN107858886B (en) | Viaduct foundation peripheral ground road and construction method thereof | |
| CN211815270U (en) | Quick maintenance structure of road surface infiltration under heavy load traffic | |
| CN206127852U (en) | Dark bridge of filling out bed course disconnect -type foundation structure is traded in adoption | |
| CN212128696U (en) | Road bridge links up mixed light dirt road bed structure of section bubble | |
| CN205934861U (en) | Mix dam structure | |
| CN216999110U (en) | Roadbed pile plate structure for controlling roadbed settlement | |
| CN216864875U (en) | A light culvert roadbed structure for controlling difference subsides | |
| CN216689000U (en) | Culvert type combined bridge abutment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215000 No.1, Nanhuan East Road, Suzhou City, Jiangsu Province Patentee after: Zhongyifeng (Suzhou) Urban Construction and Development Co.,Ltd. Address before: 215000 No.1, Nanhuan East Road, Suzhou City, Jiangsu Province Patentee before: SUZHOU ZHONGHENGTONG ROAD AND BRIDGE GROUP Co.,Ltd. |