CN114438839B - Construction method of half-filling and half-digging roadbed - Google Patents
Construction method of half-filling and half-digging roadbed Download PDFInfo
- Publication number
- CN114438839B CN114438839B CN202011198693.1A CN202011198693A CN114438839B CN 114438839 B CN114438839 B CN 114438839B CN 202011198693 A CN202011198693 A CN 202011198693A CN 114438839 B CN114438839 B CN 114438839B
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- Prior art keywords
- roadbed
- filling
- protection column
- elevation
- filling layer
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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
- 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
- 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
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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
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- 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 relates to a construction method of a half-filled half-excavated roadbed, after a roadbed filling layer is excavated to the bottom elevation, casting a square side protection column at intervals on the side close to a side slope of the roadbed, casting a square side protection column at intervals on the side far away from the side slope along the roadbed, connecting a plurality of prestress pull rods between the square side protection column and the square side protection column which are transversely opposite along the roadbed, casting concrete connecting walls between adjacent square side protection columns, and connecting all square side protection columns into a whole; and then constructing a roadbed filling layer, tensioning and anchoring the pull rod, and finally constructing a roadbed surface layer. According to the invention, the protection columns are arranged on the roadbed filling side and the excavation side, and the roadbed is stabilized by pulling the protection columns through the pull rods; connecting walls are arranged between the filling side stand columns, so that the construction amount of a roadbed filling layer can be reduced; after the pull rod is tensioned, the roadbed filling layer can quickly form a stable structure, so that roadbed surface layer construction can be quickly performed, and construction progress is quickened.
Description
Technical Field
The invention belongs to the technical field of road construction, relates to construction of mountain road roadbed, and in particular relates to a construction method of a half-filling and half-digging roadbed.
Background
Mountain expressways are built along hillsides, and roadbeds are required to be constructed in a half-filling and half-digging mode, namely, the side, close to the slope, of the roadbeds is dug, and the side, far away from the slope, of the roadbeds is filled. In order to prevent the phenomena of slope collapse, collapse and the like of a half-filled and half-excavated road section, a retaining wall is generally constructed on the side, close to the slope, of a roadbed, but after a period of time of road operation, the conventional retaining wall also deforms or displaces and the like, so that the roadbed is unstable, and a certain potential safety hazard is caused to normal road traffic.
Disclosure of Invention
Aiming at the situation, the invention provides a construction method of the half-filling and half-digging roadbed, which can effectively fix the roadbed slope and ensure the safety of road operation.
The technical scheme of the invention is as follows:
the construction method of the half-filling and half-digging roadbed is characterized by comprising the following steps of:
(1) According to the side lines on two sides of the roadbed, excavating along the side slope to the elevation of the bottom of the roadbed filling layer, pouring a square side protection column at intervals on the side, close to the side slope, of the roadbed, pouring a square side protection column at intervals on the side, far away from the side slope, of the roadbed, wherein the intervals between the square side protection column and the square side protection column are equal; the elevation of the lower end of each protection column is positioned at a certain depth below the elevation of the bottom of the roadbed filling layer, wherein the upper end of the excavation side protection column is higher than the elevation of the top of the roadbed base layer by a certain height, and the upper end of the filling side protection column is flush with the elevation of the top of the roadbed filling layer; each excavation side protection column and each filling side protection column are poured by reinforced concrete, and a plurality of pull rod through holes are reserved between the bottom elevation and the top elevation of the roadbed filling layer along the road base transversely during pouring;
(2) Connecting a plurality of prestress pull rods between the excavation side protective columns and the filling side protective columns which are transversely opposite along the road base, and sleeving a PVC pipe on each prestress pull rod;
(3) Pouring concrete connecting walls between adjacent filling side protective columns to connect all the filling side protective columns into a whole; the height of the connecting wall is flush with the top elevation of the roadbed filling layer;
(4) Constructing a roadbed filling layer, tensioning a pull rod outside a filling side protective column after the roadbed filling layer is constructed, and respectively anchoring two ends of the tensioned pull rod with the excavation side protective column and the filling side protective column after tensioning;
(5) And after the roadbed filling layer is stable, constructing a roadbed surface layer.
The invention has the following advantages:
(1) The protection columns are arranged on the roadbed filling side and the excavation side, and the roadbed and the side slope can be stabilized by pulling the protection columns through the pull rods;
(2) The connecting walls are arranged between the filling side upright posts, so that the stability of the filling side upright posts is enhanced, a vertical retaining wall is formed, the roadbed is filled in the retaining wall, the construction amount of a roadbed filling layer can be reduced, and the construction cost is reduced;
(3) After the pull rod is tensioned, the roadbed filling layer can quickly form a stable structure, so that roadbed surface layer construction can be quickly performed, and construction progress is quickened.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in the lateral direction of the road base;
FIG. 2 is a schematic view of the construction of the present invention on the fill side in the longitudinal direction of the road base;
fig. 3 is a schematic view of the construction of the present invention on the side of the excavation along the longitudinal direction of the road base.
Detailed Description
The concrete construction method of the invention is as follows:
(1) As shown in fig. 1, 2 and 3, the roadbed is built longitudinally along the hillside 1, and needs to be excavated on the side close to the hillside and filled on the side far from the hillside. After the side lines on two sides of a roadbed are lofted, excavating to the elevation of the bottom of a roadbed filling layer 2 along a side slope, pouring a excavation side protection column 3 at intervals on the side, close to the side slope, of the roadbed, pouring a filling side protection column 4 at intervals on the side, far away from the side slope, of the roadbed, wherein the intervals between the excavation side protection column 3 and the filling side protection column 4 are equal; the elevation of the lower end of each protection column is positioned at a certain depth below the elevation of the bottom of the roadbed filling layer, wherein the upper end of the excavation side protection column 3 is higher than the designed elevation of the top of the roadbed surface layer 5 by a certain height, and the upper end of the filling side protection column 4 is flush with the elevation of the top of the roadbed filling layer 2; each excavation side protection column 3 and each filling side protection column 4 are poured by reinforced concrete, and a plurality of pull rod through holes are reserved between the bottom elevation and the top elevation of the roadbed filling layer transversely along the roadbed during pouring;
(2) A plurality of prestress pull rods 6 are connected between the excavation side protective columns 3 and the filling side protective columns 4 which are transversely opposite along the road base, and PVC pipes are sleeved on each prestress pull rod 6 to prevent the pull rods from being corroded;
(3) Pouring concrete connecting walls 7 between adjacent filling side protective columns to connect all the filling side protective columns 4 into a whole; the height of the connecting wall 7 is flush with the top elevation of the roadbed filling layer 2;
(4) Constructing a roadbed filling layer 2, tensioning a pull rod 6 at the outer side of a filling side protection column after filling, and respectively anchoring two ends of the tensioned pull rod with the excavation side protection column and the filling side protection column;
(5) And after the roadbed filling layer is compacted and stabilized, constructing a roadbed surface layer 5.
Claims (1)
1. The construction method of the half-filling and half-digging roadbed is characterized by comprising the following steps of:
(1) According to the side lines on two sides of the roadbed, excavating along the side slope to the elevation of the bottom of the roadbed filling layer, pouring a square side protection column at intervals on the side, close to the side slope, of the roadbed, pouring a square side protection column at intervals on the side, far away from the side slope, of the roadbed, wherein the intervals between the square side protection column and the square side protection column are equal; the elevation of the lower end of each protection column is positioned at a certain depth below the elevation of the bottom of the roadbed filling layer, wherein the upper end of the excavation side protection column is higher than the elevation of the top of the roadbed base layer by a certain height, and the upper end of the filling side protection column is flush with the elevation of the top of the roadbed filling layer; each excavation side protection column and each filling side protection column are poured by reinforced concrete, and a plurality of pull rod through holes are reserved between the bottom elevation and the top elevation of the roadbed filling layer along the road base transversely during pouring;
(2) Connecting a plurality of prestress pull rods between the excavation side protective columns and the filling side protective columns which are transversely opposite along the road base, and sleeving a PVC pipe on each prestress pull rod;
(3) Pouring concrete connecting walls between adjacent filling side protective columns to connect all the filling side protective columns into a whole; the height of the connecting wall is flush with the top elevation of the roadbed filling layer;
(4) Constructing a roadbed filling layer, tensioning a pull rod outside a filling side protective column after the roadbed filling layer is constructed, and respectively anchoring two ends of the tensioned pull rod with the excavation side protective column and the filling side protective column after tensioning;
(5) And after the roadbed filling layer is stable, constructing a roadbed surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198693.1A CN114438839B (en) | 2020-10-31 | 2020-10-31 | Construction method of half-filling and half-digging roadbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198693.1A CN114438839B (en) | 2020-10-31 | 2020-10-31 | Construction method of half-filling and half-digging roadbed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114438839A CN114438839A (en) | 2022-05-06 |
| CN114438839B true CN114438839B (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011198693.1A Active CN114438839B (en) | 2020-10-31 | 2020-10-31 | Construction method of half-filling and half-digging roadbed |
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| Country | Link |
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| CN (1) | CN114438839B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899839A (en) * | 2010-03-30 | 2010-12-01 | 山东大学 | Counter-pulled type rib retaining wall of pre-stressing force cantilever |
| CN103821071B (en) * | 2014-03-04 | 2015-11-18 | 西南交通大学 | Paraplain area weak foundation soil height embankment assembling process for constructing and device |
| CN104264557B (en) * | 2014-08-28 | 2016-08-24 | 神州建设集团有限公司 | One is partly filled out and is partly dug ecological road structure and construction method |
| CN105780618B (en) * | 2016-03-24 | 2018-04-27 | 杭州江润科技有限公司 | A kind of prefabricated board is to stretching vertical no slope embankment and construction method |
| CN106245481A (en) * | 2016-08-26 | 2016-12-21 | 中铁四局集团有限公司 | Roadbed globality and the construction method of stability is kept under complex geological condition |
| CN208748685U (en) * | 2018-09-05 | 2019-04-16 | 四川电力设计咨询有限责任公司 | High semi-filling and semi-excavating section integration pavement structure |
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2020
- 2020-10-31 CN CN202011198693.1A patent/CN114438839B/en active Active
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| Publication number | Publication date |
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| CN114438839A (en) | 2022-05-06 |
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