CN112030645A - Roadbed widening method with road shoulders - Google Patents
Roadbed widening method with road shoulders Download PDFInfo
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- CN112030645A CN112030645A CN202011041804.8A CN202011041804A CN112030645A CN 112030645 A CN112030645 A CN 112030645A CN 202011041804 A CN202011041804 A CN 202011041804A CN 112030645 A CN112030645 A CN 112030645A
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- soil
- retaining wall
- roadbed
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- road
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- 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
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- 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
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0266—Retaining or protecting walls characterised by constructional features made up of preformed elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
- E02D2300/0032—Steel; Iron in sheet form, i.e. bent or deformed plate-material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0045—Composites
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Hydrology & Water Resources (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of road engineering, in particular to a roadbed widening method with a road shoulder; the technical scheme is as follows: the method comprises the following steps: building a soil retaining body foundation at the bottom of the outer side of the existing retaining wall according to the required widened width of the roadbed; building a soil retaining body on the basis of the soil retaining body; filling soil in a gap between the existing retaining wall and the soil retaining body; chiseling off the part of the top of the existing retaining wall higher than the top of the roadbed; and constructing a widened pavement on the top of the filled soil and the top of the chiseled existing retaining wall. The invention arranges the soil retaining foundation and the retaining wall outside the existing retaining wall, and fills the soil between the existing retaining wall and the retaining wall, thereby avoiding the situation that the back of the new retaining wall can not be filled with soil or the soil can not be compacted; meanwhile, the existing retaining wall is reserved, the existing retaining wall does not need to be moved outwards, the existing roadbed can be widened quickly, and the requirements of different widening widths of the roadbed with the road shoulders are met, so that the sideline of the roadbed is ensured to be smooth and appropriate.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a roadbed widening method with road shoulders.
Background
The existing reconstruction or upgrading reconstruction of the low-grade highway in the mountainous area is usually accompanied with line shape adjustment and roadbed widening. For the widening of the filling roadbed, the roadbed can be widened by adopting a mode of digging steps to fill or setting retaining walls to fill, but for the condition that the existing road is provided with shoulder walls, the widening part does not have the condition of setting the filling roadbed, if the shoulder retaining walls are arranged, the condition that the back of the new retaining wall cannot be filled with soil or the soil cannot be compacted exists, and even the new retaining wall and the existing retaining wall are overlapped and have to be moved outwards.
Disclosure of Invention
Aiming at the technical problem that the roadbed provided with the road shoulders cannot be provided with a filling roadbed; the invention provides a roadbed widening method with a road shoulder, which can widen the roadbed with the road shoulder, meet the requirements of different widening widths of the roadbed with the road shoulder and ensure that the side line of the roadbed is smooth and appropriate.
The invention is realized by the following technical scheme:
a roadbed widening method with road shoulders comprises the following steps:
building a soil retaining body foundation at the bottom of the outer side of the existing retaining wall according to the required widened width of the roadbed;
building a soil retaining body on the basis of the soil retaining body;
filling soil in a gap between the existing retaining wall and the soil retaining body;
chiseling off the part of the top of the existing retaining wall higher than the top surface of the roadbed;
and constructing a widened pavement on the top of the filled soil and the top of the chiseled existing retaining wall.
The invention arranges the soil retaining foundation and the retaining wall outside the existing retaining wall, and fills the soil between the existing retaining wall and the retaining wall, thereby avoiding the situation that the back of the new retaining wall can not be filled with soil or the soil can not be compacted; meanwhile, the existing retaining wall is reserved, the existing retaining wall does not need to be moved outwards, and the existing roadbed can be widened quickly. The distance between the soil blocking body and the existing retaining wall can be set according to specific terrain, and the requirement of widening the width of the roadbed provided with the road shoulders is met, so that the sideline of the roadbed is ensured to be smooth and appropriate.
Preferably, before filling and filling, anchor a plurality of first stock in existing barricade, first stock outer end and retaining body fixed connection to with fill soil, retaining wall and existing barricade fixed together, ensure the stability of fill soil and retaining body.
Preferably, the inner end of the first anchor rod is anchored in the roadbed to reinforce the existing retaining wall.
In order to further improve the anchoring effect of the first anchor rod, the first anchor rod is distributed in a rectangular shape.
As one embodiment of the filling soil, the filling soil is foam light soil to reduce the load of the roadbed and prevent the roadbed from slipping or collapsing; meanwhile, the lateral pressure of the filling soil to the soil retaining body is reduced, and the soil retaining body is prevented from displacing; and the filling can be ensured to be filled in the space between the retaining wall body and the existing retaining wall, so that the new road shoulder is prevented from sinking.
Specifically, the foamed light soil is composed of cement, water, bubble groups and an additive material, wherein the additive material is one of fly ash, mineral powder and fine sand.
For satisfying the widening of the roadbed that is close to water, before filling the filling, in the space between existing barricade and the retaining body vertical set up the second stock, second stock lower extreme anchor is in the basement rock to prevent backstop soil body and filling soil come-up, ensure the stability of roadbed.
Further, the length of the second anchor rod in the bedrock is more than 4m so as to ensure that the second anchor rod has enough anti-floating tension.
As a concrete implementation mode of the soil retaining body foundation, the soil retaining body foundation is of a concrete structure, and the burying depth is more than 1 m.
As a concrete structure of the soil retaining body, the soil retaining body is a corrugated steel plate, and the load of the roadbed can be further reduced while sufficient structural strength is ensured; meanwhile, the soil retaining body can be constructed quickly, the efficiency of roadbed widening construction is ensured, and the influence on road passage caused by roadbed construction is reduced; in addition, the corrugated steel plate is used as the soil blocking body, so that the thickness of the soil blocking body is small, and compared with a soil blocking body which is formed by pouring concrete or building stones, the soil blocking body and the existing retaining wall can have enough space, so that soil filling and compaction soil filling of the wall back of the new retaining wall can be further ensured.
The invention has the beneficial effects that:
1. the invention arranges the soil retaining foundation and the retaining wall outside the existing retaining wall, and fills the soil between the existing retaining wall and the retaining wall, thereby avoiding the situation that the back of the new retaining wall can not be filled with soil or the soil can not be compacted;
2. the existing retaining wall is reserved, the existing retaining wall does not need to be moved outwards, and the existing roadbed can be widened quickly. The distance between the soil retaining body and the existing retaining wall can be set according to specific terrain, so that the requirements of different widening widths of the roadbed provided with the road shoulders can be met, and the side line of the roadbed is ensured to be smooth and appropriate;
3. anchoring a plurality of first anchor rods in the existing retaining wall, wherein the outer ends of the first anchor rods are fixedly connected with the soil retaining body so as to fix the filled soil, the retaining wall and the existing retaining wall together and ensure the stability of the filled soil and the soil retaining body;
4. the inner end of the first anchor rod is anchored in the roadbed so as to reinforce the existing retaining wall;
5. the soil retaining body is a corrugated steel plate, so that the load of the roadbed can be further reduced while enough structural strength is ensured; meanwhile, the soil retaining body can be constructed quickly, the efficiency of roadbed widening construction is ensured, and the influence on road passage caused by roadbed construction is reduced;
6. adopt corrugated steel board as keeping off the soil body for keep off the thickness of soil body little, for adopting the retaining body of concrete placement or stone masonry, can make and keep off and have sufficient space between soil body and the existing barricade, in order to further ensure that new barricade wall back of the body can fill out soil and compaction fill out soil.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic view of a roadbed structure widened by using the invention.
Reference numbers and corresponding part names in the drawings:
1-existing retaining wall, 2-retaining body foundation, 3-retaining body, 4-filling, 5-new road shoulder, 6-first anchor rod, 7-second anchor rod and 8-widened road surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
A roadbed widening method with road shoulders comprises the following steps:
building a soil retaining body foundation 2 at the bottom of the outer side of the existing retaining wall 1 according to the required widened width of the roadbed, wherein the soil retaining body foundation 2 is of a concrete structure, and the burying depth is more than 1m so as to ensure that the soil retaining body foundation 2 has enough bearing capacity;
building a soil retaining body 3 on the soil retaining body foundation 2, wherein the soil retaining body 3 is a corrugated steel plate, and in the example, the thickness of the corrugated steel plate is 0.25-12.5 mm;
filling soil 4 in a gap between the existing retaining wall 1 and the retaining body 3, wherein the filling soil 4 is foam light soil;
chiseling off the part of the top of the existing retaining wall 1 higher than the top of the roadbed;
building a widened pavement 8 at the top of the filled soil 4 and the top of the chiseled existing retaining wall 1;
and a new road shoulder 5 is built on the outer side of the widened road surface 8.
Preferably, before filling the filling soil 4, a plurality of first anchor rods 6 are anchored in the existing retaining wall 1, and the outer ends of the first anchor rods 6 are fixedly connected with the retaining bodies 3 so as to fix the filling soil 4, the retaining wall and the existing retaining wall 1 together and ensure the stability of the filling soil 4 and the retaining bodies 3.
Preferably, the inner ends of the first anchor rods 6 are anchored in the roadbed to reinforce the existing retaining wall 1.
For further improving the anchoring effect of first stock 6, first stock 6 is the rectangle and distributes, and is concrete, and the interval of vertical adjacent first stock 6 is 3m, and the interval of vertical adjacent first stock 6 is 2 m.
Specifically, the foamed light soil is composed of cement, water, bubble groups and an additive material, wherein the additive material is one of fly ash, mineral powder and fine sand.
In the embodiment, the soil blocking body foundation 2 and the retaining wall are arranged outside the existing retaining wall 1, and the filling soil 4 is filled between the existing retaining wall 1 and the retaining body 3, so that the situation that the back of a new retaining wall cannot be filled with the filling soil 4 or the filling soil 4 cannot be compacted is avoided; meanwhile, the existing retaining wall 1 is reserved, the existing retaining wall 1 does not need to be moved outwards, and the existing roadbed can be widened quickly. And the distance between the retaining body 3 and the existing retaining wall 1 can be set according to specific topography, and the different demands of widening the width of the roadbed provided with the road shoulder are met, so that the sideline of the roadbed is ensured to be smooth and appropriate.
In this embodiment, the soil retaining body 3 is a corrugated steel plate, which can further reduce the load of the roadbed while ensuring sufficient structural strength; meanwhile, the soil retaining body 3 can be constructed quickly, so that the efficiency of roadbed widening construction is ensured, and the influence on road passage caused by roadbed construction is reduced; in addition, the corrugated steel plate is adopted as the soil blocking body 3, so that the thickness of the soil blocking body 3 is small, and compared with the soil blocking body 3 which is formed by pouring concrete or building stones, enough space can be reserved between the soil blocking body 3 and the existing retaining wall 1, and the soil filling 4 and the compacted soil filling 4 of the wall back of the new retaining wall can be further ensured.
Example 2
A roadbed widening method with road shoulders comprises the following steps:
building a soil retaining body foundation 2 at the bottom of the outer side of the existing retaining wall 1 according to the required widened width of the roadbed, wherein the soil retaining body foundation 2 is of a concrete structure, and the embedding depth is less than the scouring depth by 1m, so that the sufficient bearing capacity of the soil retaining body foundation 2 is ensured;
building a soil retaining body 3 on the soil retaining body foundation 2, wherein the soil retaining body 3 is a corrugated steel plate, and in the example, the thickness of the corrugated steel plate is 0.25-12.5 mm;
anchoring a plurality of first anchor rods 6 in the existing retaining wall 1, wherein the outer ends of the first anchor rods 6 are fixedly connected with the retaining body 3 so as to fix the filling 4, the retaining wall and the existing retaining wall 1 together and ensure the stability of the filling 4 and the retaining body 3;
a second anchor rod 7 is vertically arranged in a gap between the existing retaining wall 1 and the retaining body 3, the lower end of the second anchor rod 7 is anchored in bedrock, and the length of the second anchor rod 7 in the bedrock is more than 4 m;
filling soil 4 in a gap between the existing retaining wall 1 and the retaining body 3, wherein the filling soil 4 is foam light soil;
chiseling off the part of the top of the existing retaining wall 1 higher than the top of the roadbed;
building a widened pavement 8 at the top of the filled soil 4 and the top of the chiseled existing retaining wall 1;
and a new road shoulder 5 is built on the outer side of the widened road surface 8.
Preferably, the inner ends of the first anchor rods 6 are anchored in the roadbed to reinforce the existing retaining wall 1.
For further improving the anchoring effect of first stock 6, first stock 6 is the rectangle and distributes, and is concrete, and the interval of vertical adjacent first stock 6 is 3m, and the interval of vertical adjacent first stock 6 is 2 m.
Specifically, the foamed light soil is composed of cement, water, bubble groups and an additive material, wherein the additive material is one of fly ash, mineral powder and fine sand.
In the embodiment, the soil blocking body foundation 2 and the retaining wall are arranged outside the existing retaining wall 1, and the filling soil 4 is filled between the existing retaining wall 1 and the retaining body 3, so that the situation that the back of a new retaining wall cannot be filled with the filling soil 4 or the filling soil 4 cannot be compacted is avoided; meanwhile, the existing retaining wall 1 is reserved, the existing retaining wall 1 does not need to be moved outwards, and the existing roadbed can be widened quickly. And the distance between the retaining body 3 and the existing retaining wall 1 can be set according to specific topography, and the different demands of widening the width of the roadbed provided with the road shoulder are met, so that the sideline of the roadbed is ensured to be smooth and appropriate.
In this embodiment, the soil retaining body 3 is a corrugated steel plate, which can further reduce the load of the roadbed while ensuring sufficient structural strength; meanwhile, the soil retaining body 3 can be constructed quickly, so that the efficiency of roadbed widening construction is ensured, and the influence on road passage caused by roadbed construction is reduced; in addition, the corrugated steel plate is adopted as the soil blocking body 3, so that the thickness of the soil blocking body 3 is small, and compared with the soil blocking body 3 which is formed by pouring concrete or building stones, enough space can be reserved between the soil blocking body 3 and the existing retaining wall 1, and the soil filling 4 and the compacted soil filling 4 of the wall back of the new retaining wall can be further ensured.
Simultaneously, before filling 4, in the space between existing barricade 1 and the fender soil body 3 vertical second stock 7 that sets up, the anchor of second stock 7 lower extreme is in the basement rock to prevent backstop soil body 3 and the 4 come-up of banket, ensure the stability of road bed, in order to satisfy the road section that is close to the water to carry out the demand of widening based on the road bed.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A roadbed widening method with road shoulders is characterized by comprising the following steps:
building a soil retaining body foundation (2) at the bottom of the outer side of the existing retaining wall (1) according to the required widened width of the roadbed;
building a soil retaining body (3) on the soil retaining body foundation (2);
filling soil (4) in a gap between the existing retaining wall (1) and the soil retaining body (3);
chiseling off the part of the top of the existing retaining wall (1) higher than the top of the roadbed;
and a widened pavement is built at the top of the filling (4) and the top of the chiseled existing retaining wall (1).
2. The roadbed widening method with the road shoulders as claimed in claim 1, wherein a plurality of first anchor rods (6) are anchored in the existing retaining wall (1) before filling the filling (4), and the outer ends of the first anchor rods (6) are fixedly connected with the retaining body (3).
3. The method for widening a road bed with berms as claimed in claim 2, wherein the inner ends of said first anchoring rods (6) are anchored in the road bed.
4. The road bed widening method with berms as per claim 3, characterized in that the first anchor rods (6) are distributed in a rectangular shape.
5. The road-shouldered road bed widening method according to any one of claims 1 to 4, characterized in that the filling (4) is foamed lightweight soil.
6. The road bed widening method provided with the road shoulders as claimed in claim 5, wherein the foamed light soil is composed of cement, water, bubble groups and an additive material, and the additive material is one of fly ash, mineral powder and fine sand.
7. The roadbed widening method with the road shoulders as claimed in claim 5, wherein before filling the filling (4), second anchor rods (7) are vertically arranged in the gaps between the existing retaining walls (1) and the retaining bodies (3), and the lower ends of the second anchor rods (7) are anchored in bedrock.
8. The road-shouldered road bed widening method according to claim 7, characterized in that the length of the second anchor rods (7) in the bedrock is greater than 4 m.
9. The roadbed widening method with the road shoulders as claimed in claim 1, wherein the soil retaining body foundation (2) is of a concrete structure and the embedment depth is more than 1 m.
10. The road bed widening method with road shoulders as claimed in claim 1, wherein the soil retaining body (3) is a corrugated steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011041804.8A CN112030645A (en) | 2020-09-28 | 2020-09-28 | Roadbed widening method with road shoulders |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011041804.8A CN112030645A (en) | 2020-09-28 | 2020-09-28 | Roadbed widening method with road shoulders |
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| CN112030645A true CN112030645A (en) | 2020-12-04 |
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| CN202011041804.8A Pending CN112030645A (en) | 2020-09-28 | 2020-09-28 | Roadbed widening method with road shoulders |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921727A (en) * | 2021-01-28 | 2021-06-08 | 攀钢集团工程技术有限公司 | High and steep slope road widening construction method |
| CN113308953A (en) * | 2021-05-17 | 2021-08-27 | 浙大城市学院 | Construction method for widening embankment by utilizing foam concrete of existing retaining wall |
| CN113914164A (en) * | 2021-10-18 | 2022-01-11 | 重庆交通大学 | Widened roadbed structure of expressway and construction method thereof |
| CN114319425A (en) * | 2022-01-17 | 2022-04-12 | 中铁二十二局集团第一工程有限公司 | Newly-built sheet pile wall-existing cantilever retaining wall embankment group wide combination retaining structure |
-
2020
- 2020-09-28 CN CN202011041804.8A patent/CN112030645A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921727A (en) * | 2021-01-28 | 2021-06-08 | 攀钢集团工程技术有限公司 | High and steep slope road widening construction method |
| CN113308953A (en) * | 2021-05-17 | 2021-08-27 | 浙大城市学院 | Construction method for widening embankment by utilizing foam concrete of existing retaining wall |
| CN113914164A (en) * | 2021-10-18 | 2022-01-11 | 重庆交通大学 | Widened roadbed structure of expressway and construction method thereof |
| CN114319425A (en) * | 2022-01-17 | 2022-04-12 | 中铁二十二局集团第一工程有限公司 | Newly-built sheet pile wall-existing cantilever retaining wall embankment group wide combination retaining structure |
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