CN112211055A - Bottom is permeated water and is endured roadbed structure that soaks - Google Patents
Bottom is permeated water and is endured roadbed structure that soaks Download PDFInfo
- Publication number
- CN112211055A CN112211055A CN202011230291.5A CN202011230291A CN112211055A CN 112211055 A CN112211055 A CN 112211055A CN 202011230291 A CN202011230291 A CN 202011230291A CN 112211055 A CN112211055 A CN 112211055A
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- Prior art keywords
- roadbed
- permeable
- layer
- gravel
- soaking
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 131
- 238000002791 soaking Methods 0.000 claims abstract description 22
- 239000004567 concrete Substances 0.000 claims abstract description 16
- 239000011241 protective layer Substances 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 abstract description 11
- 230000035699 permeability Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 239000011380 pervious concrete Substances 0.000 description 3
- 238000006424 Flood reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to the technical field of highway engineering and discloses a bottom permeable soaking-resistant roadbed structure.A N-layer gravel permeable roadbed layer and a permeable concrete side slope protection layer are arranged between a foundation and a common roadbed layer, and the permeable concrete side slope protection layer is arranged on the outer side of a side slope of the N-layer gravel permeable roadbed layer; the wire netting is arranged below each gravel permeable roadbed layer, after the gravel permeable roadbed layers are formed by rolling, the wire netting arranged below each gravel permeable roadbed layer is bent to wrap the gravel permeable roadbed layer, and the wire netting is fixed on the gravel permeable roadbed layers through a plurality of fixing parts. The invention can not only make the bottom of the roadbed have the soaking resistance function, but also meet the water permeability requirement of flood crossing the roadbed; the gravel permeable road base layer is high in stability, and the permeable concrete side slope protective layer can protect the side slope of the roadbed from being washed away by flood and can facilitate the passage of flood.
Description
Technical Field
The invention belongs to the technical field of highway engineering, and particularly relates to a roadbed structure.
Background
In recent years, the road construction business of China is developed rapidly, and the current mileage of traffic is the first in the world. The reasonable road network layout of the high-grade road is very important for forming and perfecting a road transportation network system, and a plurality of high-grade roads have to be built in a stagnant flood area due to the requirements of local economic development and planning layout. Not only can the flood erode the side slope of the highway subgrade, but also the filling materials of the subgrade can be softened along with the immersion of the flood, and further the bearing capacity and the stability of the subgrade are reduced. Therefore, a great deal of water damage problems occur to the highway subgrade in the impounded flood area every year, and the highway damage caused by water damage is treated by spending huge maintenance and repair funds every year. In addition, highway subgrades within stagnant flood zones are likely to be subjected to prolonged immersion by floods, and floods have a drainage need through the subgrade. It is seen that flood protection of highway foundations is very important.
At present, flood protection for a highway subgrade mainly prevents scouring of flood and permeation to the interior of the subgrade in a mode of paving a rubble slope, so that the problem that the bearing capacity of the subgrade is reduced due to permeation of the flood into the subgrade is difficult to avoid, and the problem that the flood needs to cross the highway subgrade cannot be solved.
Disclosure of Invention
The invention provides a roadbed structure with a permeable and soaking-resistant bottom, aiming at solving the technical problem that a highway roadbed in a stagnant flood storage area needs to be permeable and soaking-resistant.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a bottom permeable soaking-resistant roadbed structure is characterized in that N layers of gravel permeable roadbed layers and permeable concrete side slope protection layers are arranged between a foundation and a common roadbed layer, the permeable concrete side slope protection layers are arranged on the outer sides of the side slopes of the N layers of gravel permeable roadbed layers, wherein N is a positive integer;
an iron wire net is arranged below each layer of gravel permeable roadbed layer, and two sides of the iron wire net are wider than the gravel permeable roadbed layer arranged on the iron wire net; after each layer of gravel permeable roadbed layer is rolled and formed, the wider part of the iron wire net arranged below the gravel permeable roadbed layer is bent back to wrap the gravel permeable roadbed layer, and the wire net is fixed on the gravel permeable roadbed layer through a plurality of fixing parts.
Further, the filling height of the N layers of gravel permeable road base layers at least exceeds the designed flood level by 0.5 m.
Further, the porosity of the gravel permeable road base layer is 16% -21%.
Further, the gravel maximum grain diameter of the gravel permeable road base layer is not more than 15 cm.
Further, the single-layer paving thickness H of the gravel permeable roadbed layer is 15-30 cm and is not less than 1.5 times of the maximum particle size of gravel.
Furthermore, two sides of the iron wire net are respectively wider than the gravel permeable road base layer arranged on the iron wire net by at least 2-3 meters.
Further, the mesh size of the wire netting ranges from 3cm × 3cm to 5cm × 5 cm.
Further, the distance between two adjacent fixing parts is 30-50 cm.
Further, the fixing part is a U-shaped rivet.
Further, the thickness of the pervious concrete side slope protective layer is 0.3-0.5 m.
The invention has the beneficial effects that:
according to the bottom permeable soaking-resistant roadbed structure, the N gravel permeable roadbed layers are paved between the foundation and the common roadbed layer, so that the roadbed bottom has a soaking-resistant function, and the permeable requirement of flood crossing the roadbed can be met.
According to the bottom water-permeable soaking-resistant roadbed structure, the gravel water-permeable roadbed layer is wrapped layer by layer through the iron wire net and is fixed by matching with the fixing part, so that the stability of the gravel water-permeable roadbed layer is ensured, and the possibility of loosening and sliding of individual gravels at the roadbed side slope is reduced.
And thirdly, the permeable and soaking-resistant roadbed structure with the bottom is characterized in that the permeable concrete side slope protective layer is arranged outside the side slope of the N-layer gravel permeable roadbed layer, so that the roadbed side slope can be protected from being washed by flood, and the flood can conveniently pass through the permeable roadbed layer to cross the highway roadbed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a permeable-to-water and soaking-resistant roadbed structure at the bottom according to the embodiment of the invention.
In the above figures: 1. a foundation; 2. a wire mesh; 3. a gravel permeable roadbed layer; 4. a U-shaped rivet; 5. a pervious concrete side slope protective layer; 6. a common roadbed layer; 7. a pavement structure; 8. an earth shoulder.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the present embodiment, a bottom water-permeable and soaking-resistant roadbed structure is provided, and fig. 1 is a schematic structural diagram of the bottom water-permeable and soaking-resistant roadbed structure according to the embodiment of the present invention, as shown in fig. 1, the bottom water-permeable and soaking-resistant roadbed structure includes a foundation 1, an iron wire net 2, a gravel water-permeable roadbed layer 3, a permeable concrete slope protection layer 5 and a common roadbed layer 6.
The gravel permeable road base layer 3 is provided with N layers, wherein N is a positive integer greater than or equal to 1.
A first layer of wire netting 2 is laid on the foundation 1, and a first layer of gravel permeable roadbed 3 is filled on the first layer of wire netting 2; after the gravel permeable roadbed 3 of the first layer is formed by rolling, the wire netting 2 of the first layer is bent back to wrap the gravel permeable roadbed 3 of the first layer, and the wire netting 2 of the first layer is anchored by a plurality of U-shaped rivets 4 at the bent back position.
The gravel permeable roadbed 3 upper berth of first layer is equipped with the gravel permeable roadbed 3 of next floor 2 and next floor, and the mode of laying is that gravel permeable roadbed 3 of this floor is rolled into the back, and the gravel permeable roadbed 3 of this floor is wrapped up in the bending of wire netting 2 that its lower was set up to the bending part of wire netting 2 is through the gravel permeable roadbed 3 of a plurality of U type rivets 4 anchor in this floor.
By analogy, laying the wire netting 2 and filling the gravel permeable roadbed layer 3 layer by layer until the filling height exceeds the designed flood level by 0.5 m, and arranging a permeable concrete side slope protection layer 5 outside the side slope of the N-layer gravel permeable roadbed layer 3.
The thickness of the pervious concrete side slope protective layer 5 is usually within the range of 0.3-0.5 m, so that the engineering economy is kept while the road base side slope is protected from being damaged by scouring.
And paving a common roadbed layer 6 on the top surface of the last gravel permeable roadbed layer 3 and the permeable concrete side slope protective layer 5 according to a conventional method until the designed elevation of the roadbed. The ordinary roadbed 6 is constructed by adopting ordinary roadbed filling materials according to a conventional method.
And a common road base layer 6 is used for paving a road surface structure 7 and a road shoulder 8. The filling, laying, anchoring, paving and vibration rolling mentioned in the invention all belong to the prior art.
The gravel permeable roadbed 3 of each layer is formed by selecting gravels with different grain diameters, paving the gravels after grading design, and the porosity of the gravel permeable roadbed 3 after rolling and forming is preferably controlled between 16 percent and 21 percent so as to meet the water permeability requirement of flood crossing the roadbed.
As a preferred embodiment, the maximum gravel particle size of the gravel permeable roadbed 3 is not more than 15cm, the construction rolling effect is better, and the compactness of the gravel permeable roadbed 3 can be ensured.
In a preferred embodiment, the single-layer pavement thickness H of the gravel permeable roadbed 3 is 15-30 cm and is not less than 1.5 times of the maximum particle size of gravel; the single-layer paving thickness can ensure the compactness of the gravel permeable roadbed 3 under the condition of rolling by common construction machinery.
The two sides of the wire netting 2 arranged below the gravel permeable roadbed 3 of each layer need to be wider than the gravel permeable roadbed 3 of the layer, and the width of the wire netting 2 preferably exceeds the two sides of the gravel permeable roadbed 3 above the wire netting by at least 2-3 meters respectively.
In a preferred embodiment, the mesh size of the wire 2 is in the range of 3cm × 3cm to 5cm × 5cm, so that the wire 2 can be wrapped around the gravel permeable layer 3 well and prevent the small-diameter gravel from being squeezed out through the gaps of the wire 2.
As a preferable embodiment, the distance between two adjacent U-shaped rivets 4 is set to be 50 cm-120 cm, so that the gravel particles in the gravel permeable road base layer 2 are embedded and squeezed.
In addition, in addition to the U-shaped rivet 4, other fixing members may be used to anchor the bent back portion of the wire netting 2 to the gravel permeable roadbed 3 as long as the wire netting and the gravel layer can be fixed to each other.
The construction process of the permeable and soaking-resistant roadbed structure at the bottom can be carried out according to the following steps:
(1) firstly, cleaning a construction site, leveling a foundation 1, and reinforcing the foundation 1 to ensure that the bearing capacity of the foundation 1 meets the design requirement for the road section of which the bearing capacity cannot meet the design requirement;
(2) a first layer of wire netting 2 on the foundation 1;
(3) filling a first gravel permeable roadbed 3 on the first layer of the wire mesh 2, wherein the single-layer paving thickness H of the gravel permeable roadbed 3 is comprehensively determined according to the maximum particle size of gravel and the efficiency of a rolling machine;
(4) rolling and forming the gravel permeable roadbed 3 of the first layer;
(5) the wire netting 2 arranged below the first gravel permeable roadbed 3 is bent back to wrap the gravel permeable roadbed 3, and the bent part of the wire netting 2 is anchored by a plurality of U-shaped rivets 4;
(6) and laying the iron wire net 2 of the second layer and the gravel permeable roadbed 3 of the second layer on the formed and wrapped gravel permeable roadbed 3, and rolling and forming. And then, construction layer by layer is performed in sequence until the elevation of the gravel permeable roadbed 3 reaches the designed flood level plus 0.5 m or more;
(7) pouring a permeable concrete slope protection layer 5 with a designed thickness on the outer side of the gravel permeable roadbed 3 after the rolling forming;
(8) and paving a common roadbed layer 6 on the top surface of the last gravel permeable roadbed layer 3 and the permeable concrete side slope protection layer 5 according to a conventional method until the designed elevation of the roadbed.
After the roadbed construction is finished, a pavement structure 7 and a soil shoulder 8 can be built, and other work can be further finished.
The foundation structure and the construction process thereof are further described in a specific application, and the foundation comprises three gravel permeable roadbed layers 3, wherein the thickness H of each layer is 0.25 m.
Laying a first layer of wire netting 2 on the foundation 1, and enabling the width of the first layer of wire netting to exceed the two sides of the first layer of gravel permeable roadbed 3 respectively by 2.45 meters (1.8H + 2); fill gravel road bed layer 3 that permeates water of first layer on the wire netting 2 of first layer, the gravel road bed layer 3 that permeates water of first layer is through rolling the shaping back, returns the bent parcel of wire netting 2 that sets up below and live first layer gravel road bed layer 3 that permeates water to return bend with 5U type rivets 4 anchor at wire netting 1, wherein 1U type rivet 4 is used for the side of the side slope, 4U type rivets 3 are used for above this gravel road bed layer 3 that permeates water. Paving a second layer of wire netting 2 on the first layer of the formed gravel permeable roadbed 3, and paving a second layer of gravel permeable roadbed 3 on the second layer of the wire netting 2; after the gravel permeable roadbed 3 of second floor rolls the shaping, returns the second floor's 2 iron wire nets that bend parcel that set up below it and live second floor gravel permeable roadbed 3 to return the bend at iron wire nets 2 and use 5U type rivets 4 anchor, wherein 1U type rivet 4 is used for the side slope side, 4U type rivets 4 are used for above this gravel permeable roadbed 3. Laying a third layer of wire netting 2 on the second layer of the formed gravel permeable roadbed 3, and laying a third layer of gravel permeable roadbed 3 on the third layer of wire netting; after the gravel permeable roadbed 3 of the third layer is rolled and formed, the third layer wire netting 2 arranged below the third layer wire netting is bent back to wrap the gravel permeable roadbed 3 of the third layer, and 5U-shaped rivets 4 are anchored at the bent part of the wire netting 2, wherein 1U-shaped rivet 4 is used for the side face of the side slope, and 4U-shaped rivets 4 are used for the gravel permeable roadbed 3.
And after the gravel permeable roadbed 3 is completely filled and rolled, a 30 cm-thick permeable concrete side slope protection layer 5 is poured on the outer side of the gravel permeable roadbed.
And paving a common roadbed layer 6 on the top surface of the third (last) gravel permeable roadbed layer 3 and the permeable concrete side slope protection layer 5 according to a conventional method until the designed elevation of the roadbed.
After the roadbed structure is constructed, the pavement structure 7 and the soil shoulder 8 can be further constructed.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.
Claims (10)
1. A roadbed structure with a permeable and soaking-resistant bottom is characterized in that N gravel permeable roadbed layers and a permeable concrete side slope protection layer are arranged between a foundation and a common roadbed layer, the permeable concrete side slope protection layer is arranged on the outer side of a side slope of the N gravel permeable roadbed layers, wherein N is a positive integer;
an iron wire net is arranged below each layer of gravel permeable roadbed layer, and two sides of the iron wire net are wider than the gravel permeable roadbed layer arranged on the iron wire net; after each layer of gravel permeable roadbed layer is rolled and formed, the wider part of the iron wire net arranged below the gravel permeable roadbed layer is bent back to wrap the gravel permeable roadbed layer, and the wire net is fixed on the gravel permeable roadbed layer through a plurality of fixing parts.
2. The permeable and soaking-resistant roadbed structure of claim 1, wherein the filling height of the N layers of gravel permeable roadbed layers exceeds the design flood level by at least 0.5 m.
3. The bottom water-permeable soaking-resistant roadbed structure according to claim 1, wherein the gravel water-permeable roadbed layer has a porosity of 16-21%.
4. The bottom water-permeable soaking-resistant roadbed structure of claim 1, wherein the gravel maximum grain size of the gravel water-permeable roadbed layer is not more than 15 cm.
5. The foundation structure of claim 1, wherein the gravel permeable roadbed has a single-layer pavement thickness H of 15-30 cm and not less than 1.5 times of the maximum particle size of the gravel.
6. The permeable and soaking-resistant roadbed structure of claim 1, wherein two sides of the wire netting are wider than the gravel permeable roadbed layer arranged on the wire netting by at least 2-3 m.
7. The permeable and soaking-resistant roadbed structure of the bottom, according to claim 1, wherein the mesh size of the wire netting ranges from 3cm x 3cm to 5cm x 5 cm.
8. The foundation permeable and soak-resistant roadbed structure of claim 1, wherein the distance between two adjacent fixing parts is 30 cm-50 cm.
9. The permeable and soaking-resistant roadbed structure of claim 1, wherein the fixing parts are U-shaped rivets.
10. The permeable and soaking-resistant roadbed structure at the bottom part of claim 1, wherein the thickness of the permeable concrete slope protective layer is 0.3-0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230291.5A CN112211055A (en) | 2020-11-06 | 2020-11-06 | Bottom is permeated water and is endured roadbed structure that soaks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230291.5A CN112211055A (en) | 2020-11-06 | 2020-11-06 | Bottom is permeated water and is endured roadbed structure that soaks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211055A true CN112211055A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011230291.5A Pending CN112211055A (en) | 2020-11-06 | 2020-11-06 | Bottom is permeated water and is endured roadbed structure that soaks |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202148477U (en) * | 2011-07-23 | 2012-02-22 | 中铁二院工程集团有限责任公司 | Improved soil subgrade structure of high-speed railway in strong rainfall areas |
| KR20140032160A (en) * | 2012-09-06 | 2014-03-14 | 김철각 | Road pavement using a stone basket and perforated drain pipe |
| CN206800094U (en) * | 2017-06-20 | 2017-12-26 | 河北工业大学 | A kind of big particle diameter building waste roadbed |
| CN107988867A (en) * | 2017-12-30 | 2018-05-04 | 南京理工大学泰州科技学院 | A kind of novel water permeable road and its construction method |
| CN214089273U (en) * | 2020-11-06 | 2021-08-31 | 天津市市政工程设计研究院 | Bottom is permeated water and is endured roadbed structure that soaks |
-
2020
- 2020-11-06 CN CN202011230291.5A patent/CN112211055A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202148477U (en) * | 2011-07-23 | 2012-02-22 | 中铁二院工程集团有限责任公司 | Improved soil subgrade structure of high-speed railway in strong rainfall areas |
| KR20140032160A (en) * | 2012-09-06 | 2014-03-14 | 김철각 | Road pavement using a stone basket and perforated drain pipe |
| CN206800094U (en) * | 2017-06-20 | 2017-12-26 | 河北工业大学 | A kind of big particle diameter building waste roadbed |
| CN107988867A (en) * | 2017-12-30 | 2018-05-04 | 南京理工大学泰州科技学院 | A kind of novel water permeable road and its construction method |
| CN214089273U (en) * | 2020-11-06 | 2021-08-31 | 天津市市政工程设计研究院 | Bottom is permeated water and is endured roadbed structure that soaks |
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