CN113897829A - Mountain-separating roadbed structure with partially overlapped upper plane - Google Patents
Mountain-separating roadbed structure with partially overlapped upper plane Download PDFInfo
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- CN113897829A CN113897829A CN202110861301.3A CN202110861301A CN113897829A CN 113897829 A CN113897829 A CN 113897829A CN 202110861301 A CN202110861301 A CN 202110861301A CN 113897829 A CN113897829 A CN 113897829A
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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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
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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
- E01C5/00—Pavings made of prefabricated single units
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
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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
- 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
- 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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- 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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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a structural form of a mountain-climbing separated roadbed with partially overlapped planes, and belongs to the technical field of highway engineering. The structure consists of main components such as anti-slide piles, prestressed anchor cables, cross beams, road slabs, connecting beams, retaining plates, anti-collision guardrails and the like, and has multiple functions of mountain anchoring, slope retaining, double-layer travelling crane and the like. The invention combines and innovates a plurality of structural forms, reduces the disturbance range and the environmental influence of the mountain separation type roadbed structure, has the characteristics of full structural efficiency, high structural space utilization rate, good structural stability and reliability, moderate construction difficulty, good environmental and economic benefits and the like, provides a new scheme for the design of the mountain separation type roadbed structure, and has popularization and application values in the technical field of highway engineering.
Description
Technical Field
The invention relates to a highway subgrade structure, in particular to a mountain-crossing separating subgrade structure which is suitable for a steep ground transverse slope in a mountainous area and partially overlapped on a plane, and belongs to the technical field of highway engineering.
Background
The countryside is vast, and mountain areas and hilly areas account for about two thirds of the total area of the country. In recent years, with the rapid development of traffic construction in China, highway construction gradually extends to remote mountainous areas with complex terrains, engineering construction conditions of the areas are difficult, mountains continuously fluctuate, and terrains, geologies and hydrology conditions are extremely complex. In order to adapt to terrains and overcome height differences, the separated subgrade is applied to various levels of highways more and more. How to accurately grasp the characteristics and difficulties of the mountain road, reasonably apply technical indexes, flexibly arrange wires, relate to the use function and the service level of the road, and are the keys of reducing the construction cost, protecting the ecological environment and saving the operation cost.
The separated roadbed can be divided into two forms of a planar linear separated roadbed and a high-low separated roadbed (a platform-separated roadbed) with separated vertical surface elevations. Generally, the separated subgrade refers to a planar linear separated subgrade, namely a subgrade form with independent planar and longitudinal design lines is separately designed for an upper lane and a lower lane; the high-low separation type roadbed means that the upper and lower lanes share a uniform design center line, or the separation distance of the center line is small (only meeting the requirement of arranging retaining walls and side ditches), and the longitudinal section line adopts a roadbed form with different design elevations.
The high-low separation type roadbed can well adapt to steep terrains and ground objects in mountainous areas due to the flexibility and the variability, and is widely applied to the design of highways in various grades of mountainous areas. Because the split roadbed has great advantages in the aspects of overcoming the height difference of the cross section, reducing excavation, protecting the ecological environment and the like, when the scheme that the mountain waist line and the mountain line are extended along the two sides of the bealock in the steep sections of the cross slope such as a mountain area or a heavy hill area is adopted, the split roadbed can obtain better effect.
The up-down lanes of the currently common high-low separation type roadbed share a uniform design center line, or the separation distance of the center line is small, the up-down lanes respectively have independent roadbed structures, no overlapping part exists on the plane, and the disturbance range of the whole roadbed structure to the mountain is smaller than that of the common plane linear separation type roadbed. The separated subgrade structure with the partially overlapped mountains on the plane can further reduce the disturbance range of the separated subgrade structure on the mountains, reduce the environmental influence and have better stability and applicability.
Disclosure of Invention
The invention relates to a highway subgrade structure, in particular to a mountain-crossing separating subgrade structure which is suitable for a steep ground transverse slope in a mountainous area and partially overlapped on a plane, and belongs to the technical field of highway engineering.
The separated subgrade structure with the partially overlapped mountains on the plane has multiple functions of mountain anchoring, slope retaining, double-layer driving and the like, can further reduce the disturbance range of the separated subgrade structure on the mountain, reduces the environmental influence, and has better stability and applicability.
In order to achieve the purpose, the invention adopts the technical scheme that:
a kind of mountain separation type roadbed structure form of the plane upper part overlap, characterized by that: the structure comprises inner-side anti-slide piles (1), upper anchor cables (2), upper soil retaining plates (3), inner-side connecting beams (4), cross beams (5), road surface plates (6), outer-side connecting beams (7), upper anti-collision guardrails (8), outer-side anti-slide piles (9), lower soil retaining plates (10), lower anti-collision guardrails (11), a roadbed structure (12), side ditches (13) and lower anchor rods (14); the inner side anti-slide piles (1) are arranged along the inner side roadbed at designed intervals, upper anchor cables (2) are arranged on the inner side anti-slide piles for further reinforcing a mountain, and upper soil retaining plates (3) and inner side connecting beams (4) are arranged between the inner side anti-slide piles (1); the upper roadbed structure mainly comprises a cross beam (5), a pavement slab (6) and an upper anti-collision guardrail (8), wherein the cross beam (5) is rigidly connected with an inner side anti-slide pile (1) and an outer side anti-slide pile (9), the pavement slab (6) is arranged on the cross beam (5), the pavement slab (6) is flush with the edge of the cross beam (5), the upper anti-collision guardrail (8) is arranged on the outer edge of the pavement slab (6), and the outer side connecting beam (7) is arranged on the outer side of the cross beam (5) to increase the longitudinal rigidity of the structure; outer anti-slide piles (9) are arranged on the inner side of the lower roadbed structure according to a design interval, lower anchor rods (14) are arranged on the outer anti-slide piles for preventing over-large vertical deformation, and lower soil retaining plates (10) are arranged between the outer anti-slide piles (9); a side ditch (13) is arranged on the inner side of the roadbed structure (12), and a lower anti-collision guardrail (11) is arranged on the outer side of the roadbed structure.
The upper roadbed structure has a part which overlaps the lower roadbed structure on the plane, and the cross beam (5) and the part of the pavement slab (6) and the upper anti-collision guardrail (8) are cantilevered on the lower roadbed structure.
The longitudinal distance between the inner side anti-slide pile (1) and the outer side anti-slide pile (9) is preferably 5-8 m, the overhanging length of the cross beam (5) is not too large, and the reasonable overhanging ratio is preferably 1/4-1/3.
The cross beam (5) is a rectangular variable cross-section reinforced concrete structural member, the concrete strength grade is not less than C40, and a prestressed reinforced concrete structure is preferably adopted for design; the inner anti-slide pile (1), the upper soil retaining plate (3), the inner connecting beam (4), the outer connecting beam (7), the outer anti-slide pile (9), the lower soil retaining plate (10) and the side ditch (13) are structural components of reinforced concrete with rectangular cross sections, and the concrete strength grade is not less than C30; the upper anti-collision guardrail (8) and the lower anti-collision guardrail (11) are reinforced concrete structural members with polygonal cross sections, and the concrete strength grade is not less than C30; the road slab (6) is a reinforced concrete structural member with a rectangular cross section, and the concrete strength grade is not less than C40; the roadbed structure (12) is designed according to the relevant roadbed design specifications; and the upper anchor cable (2) and the lower anchor rod (14) are subjected to parameter design according to relevant design specifications.
The outer side of the lower roadbed structure can adopt a natural slope meeting the standard requirements under the condition that the conditions allow, and other retaining structures can also be adopted for slope reinforcement design, such as constant-weight retaining wall structures and the like, so that the disturbance range of the roadbed structure to the mountain is further reduced.
The inner side slide-resistant piles (1), the outer side slide-resistant piles (9) and the cross beams (5) are preferably in the same cross section; each 20-30m of the structure is an independent structure section along the longitudinal direction, and structural seams are arranged among the sections according to requirements; when the structure is used for a straight line section, the distances among the inner side anti-slide piles (1), the outer side anti-slide piles (9) and the cross beams (5) are reasonably set according to the length of the line; when the structure is used for a curve section, the distances among the inner side anti-slide piles (1), the outer side anti-slide piles (9) and the cross beams (5) are adjusted, so that a plurality of structure sections are combined into a folded form on a plane to adapt to the road width of the curve section; the elevation change of the pile top ground surface is adapted by adjusting the cantilever length of the inner side slide-resistant pile (1) and the outer side slide-resistant pile (9) and the parameters of the upper anchor cable (2) and the lower anchor rod (14).
A chamfer angle can be arranged at the junction of the lower part of the cross beam (5) and the inner side slide-resistant pile (1) so as to reduce the stress concentration of the junction area.
Due to the adoption of the technical scheme, the invention has the following advantages:
according to the mountain-climbing separated roadbed structure form with the partially-overlapped plane, the upper roadbed structure is organically combined and innovated through various structure forms, and the overhanging design is carried out on the upper roadbed structure, so that the upper and lower lanes are partially overlapped on the plane, the disturbance range of the separated roadbed structure on a mountain body is further reduced, and the environmental influence is reduced.
According to the separated subgrade structure form with the partially overlapped mountains on the plane, through organic combination and innovation of various structure forms, the separated subgrade structure form has the functions of mountain anchoring, side slope retaining and the like besides the double-layer driving function, further improves the reinforcing effect of the structure on mountain side slopes, and has good stability and applicability.
Drawings
FIG. 1 is a three-dimensional view of the integral roadbed structure according to the invention
FIG. 2 is a cross-sectional view of the integral roadbed structure according to the present invention
FIG. 3 is a side elevation view of the integrated roadbed supporting structure of the present invention
FIG. 4 is a cross-sectional view of the roadbed supporting structure of the present invention
FIG. 5 is a top view of the roadbed supporting structure A-A of the present invention
FIG. 6A top view of the roadbed supporting structure B-B
FIG. 7 is a sectional elevation view of a roadbed supporting structure C-C
FIG. 8 is a D-D sectional elevation view of the roadbed supporting structure of the present invention
In the figure: 1-inner side slide-resistant pile, 2-upper anchor cable, 3-upper soil retaining plate, 4-inner side connecting beam, 5-cross beam, 6-road plate, 7-outer side connecting beam, 8-upper anti-collision guardrail, 9-outer side slide-resistant pile, 10-lower soil retaining plate, 11-lower anti-collision guardrail, 12-roadbed structure, 13-side ditch, 14-lower anchor rod and 15-mountain body.
Detailed Description
Example 1
The following detailed description of the embodiments of the present invention will be given in conjunction with the accompanying drawings to make it clear to those skilled in the art how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.
Referring to fig. 1 to 8, a separated roadbed structure with partially overlapped mountains on the plane comprises inner anti-slide piles 1, upper anchor cables 2, upper soil retaining plates 3, inner connecting beams 4, cross beams 5, road surface plates 6, outer connecting beams 7, upper anti-collision guardrails 8, outer anti-slide piles 9, lower soil retaining plates 10, lower anti-collision guardrails 11, roadbed structures 12, side ditches 13 and lower anchor rods 14.
The above components are generally reinforced concrete structures and prestressed printed concrete structures, and the detailed designs of the components, such as specific structures, dimensions, reinforcing bars and the like, should be calculated and determined according to actual conditions and relevant specification requirements.
A highway in a certain mountain area is built on a slope with a steep transverse slope on the ground, the soil body of the slope is a steep slope of 40 degrees, a high-low separation type roadbed is built, the allowable bearing capacity of a soil foundation is between 500 plus 650kpa, and the mountain-bypassing separation type roadbed structure form with partially overlapped planes is supposed to be adopted.
According to the roadbed structure scheme, the construction method from inside to outside and from top to bottom is adopted, mountain excavation is carried out from underground excavation to distributed open excavation and is carried out alternately with structure construction, so that the stability of a mountain and a structure can be ensured, and the disturbance to the natural environment can be reduced. The specific implementation method comprises the following steps:
firstly, the ground surface is excavated manually downwards to the pile bottom elevation of the designed inner side slide-resistant pile 1 by adopting a subsurface excavation method, the inner side slide-resistant pile 1 adopts a rectangular cross section, pile body anchor cable holes are poured and reserved, and a plurality of vertical side-by-side inner side slide-resistant pile 1 pile body concretes are poured along the inner side of a roadbed structure.
After the strength of the pile body concrete of the inner side anti-slide pile 1 reaches the design strength, digging out pile front mountain soil in the range of the upper anchor rope 2, drilling an anchor rope hole to a pile rear mountain through an anchor rope reserved hole of the upper cantilever section, then installing the upper anchor rope 2, pouring high-strength cement mortar to the deep part of the anchor rope hole, anchoring the tail section of the anchor rope and the mountain together, and then carrying out prestress tensioning on the upper anchor rope 2 to lock the upper anchor rope 2 on the inner side anti-slide pile 1 by using an external anchorage device.
Excavating an outer mountain to 9 pile top elevations of outer side anti-slide piles, installing upper soil retaining plates 3 and pouring inner side connecting beams 4 according to requirements in the process, waiting for the construction of an upper supporting structure to be completed, continuously adopting a subsurface excavation method to excavate downwards to 9 pile bottom elevations of the designed outer side anti-slide piles by the earth surface, adopting rectangular cross sections for the outer side anti-slide piles 9, pouring and reserving pile body anchor cable holes, and pouring a plurality of vertical side-by-side outer side anti-slide piles 9 pile body concretes along the inner side of a lower roadbed structure.
After the strength of the concrete of the pile body of the anti-slide pile 9 on the outer side reaches the design strength, formwork pouring or assembling is carried out on the cross beam 5, the road surface plate 6, the connecting beam 7 on the outer side and the anti-collision guardrail 8 on the upper portion, wherein the cross beam 5 is of a variable cross-section prestressed concrete structure, prestress tensioning is carried out by adopting a post-tensioning method, and the road surface plate 6 adopts a construction mode of factory prefabrication and field assembling.
And after the construction of the upper roadbed structure is completed, excavating pile front mountain bodies in the range of the lower anchor rods 14, mounting the lower anchor rods 14 and the lower soil retaining plates 10 until the design elevation of the lower roadbed structure, and completing the construction of the lower anti-collision guardrail 11, the roadbed structure 12 and the side ditches 13.
Claims (7)
1. A separated subgrade structure with partially overlapped mountains on the plane is characterized in that: the anti-skid device comprises inner side anti-skid piles (1), upper anchor cables (2), upper soil retaining plates (3), inner side connecting beams (4), cross beams (5), road surface plates (6), outer side connecting beams (7), upper anti-collision guardrails (8), outer side anti-skid piles (9), lower soil retaining plates (10), lower anti-collision guardrails (11), roadbed structures (12), side ditches (13) and lower anchor rods (14); the inner side anti-slide piles (1) are arranged along the inner side roadbed at designed intervals, upper anchor cables (2) are arranged on the inner side anti-slide piles to further improve the supporting and reinforcing effects of the structure on the side slope, and upper soil retaining plates (3) and inner side connecting beams (4) are arranged between the inner side anti-slide piles (1); the upper roadbed structure mainly comprises a cross beam (5), a pavement slab (6) and an upper anti-collision guardrail (8), wherein the cross beam (5) is rigidly connected with an inner side anti-slide pile (1) and an outer side anti-slide pile (9), the pavement slab (6) is arranged on the cross beam (5), the pavement slab (6) is flush with the edge of the cross beam (5), the upper anti-collision guardrail (8) is arranged on the outer edge of the pavement slab (6), and the outer side connecting beam (7) is arranged on the outer side of the cross beam (5) to increase the longitudinal rigidity of the structure; outer anti-slide piles (9) are arranged on the inner side of the lower roadbed structure according to a design interval, lower anchor rods (14) are arranged on the outer anti-slide piles for preventing over-large vertical deformation, and lower soil retaining plates (10) are arranged between the outer anti-slide piles (9); a side ditch (13) is arranged on the inner side of the roadbed structure (12), and a lower anti-collision guardrail (11) is arranged on the outer side of the roadbed structure.
2. The separated roadbed structure with the partially overlapped mountains on the plane as claimed in claim 1, wherein: the upper roadbed structure has a part which overlaps the lower roadbed structure on the plane, and the cross beam (5) and the part of the pavement slab (6) and the upper anti-collision guardrail (8) are cantilevered on the lower roadbed structure.
3. The separated roadbed structure with the partially overlapped mountains on the plane as claimed in claim 1, wherein: the longitudinal distance between the inner side anti-slide pile (1) and the outer side anti-slide pile (9) is 5-8 m, and the overhang ratio of the cross beam (5) ranges from 1/4 to 1/3.
4. The separated roadbed structure with the partially overlapped mountains on the plane as claimed in claim 1, wherein: the cross beam (5) is a rectangular variable cross-section reinforced concrete structural member, the concrete strength grade is not less than C40, and a prestressed reinforced concrete structure is adopted for design; the inner anti-slide pile (1), the upper soil retaining plate (3), the inner connecting beam (4), the outer connecting beam (7), the outer anti-slide pile (9), the lower soil retaining plate (10) and the side ditch (13) are structural components of reinforced concrete with rectangular cross sections, and the concrete strength grade is not less than C30; the upper anti-collision guardrail (8) and the lower anti-collision guardrail (11) are reinforced concrete structural members with polygonal cross sections, and the concrete strength grade is not less than C30; the road slab (6) is a reinforced concrete structural member with a rectangular cross section, and the concrete strength grade is not less than C40; the roadbed structure (12) is designed according to the relevant roadbed design specifications; and the upper anchor cable (2) and the lower anchor rod (14) are subjected to parameter design according to relevant design specifications.
5. The separated roadbed structure with the partially overlapped mountains on the plane as claimed in claim 1, wherein: the outer side of the lower roadbed structure adopts a natural slope meeting the standard requirement under the condition that the condition allows, and the balanced retaining wall structure of the lower roadbed structure is adopted to reduce the disturbance range of the roadbed structure to the mountain.
6. The separated roadbed structure with the partially overlapped mountains on the plane as claimed in claim 1, wherein: the inner side slide-resistant piles (1), the outer side slide-resistant piles (9) and the cross beam (5) are in the same cross section; each 20-30m of the structure is an independent structure section along the longitudinal direction, and structural seams are arranged among the sections according to requirements; when the structure is used for a straight line section, the distances among the inner side anti-slide piles (1), the outer side anti-slide piles (9) and the cross beam (5) are reasonably set according to the length of the line; when the structure is used for a curve section, the distances among the inner side anti-slide piles (1), the outer side anti-slide piles (9) and the cross beams (5) are adjusted, so that a plurality of structure sections are combined into a broken line type on a plane to adapt to the road width of the curve section; the elevation change of the pile top ground surface is adapted by adjusting the cantilever length of the inner side slide-resistant pile (1) and the outer side slide-resistant pile (9) and the parameters of the upper anchor cable (2) and the lower anchor rod (14).
7. The separated roadbed structure with the partially overlapped mountains on the plane as claimed in claim 1, wherein: and a chamfer is arranged at the junction of the lower part of the cross beam (5) and the inner side slide-resistant pile (1) so as to reduce the stress concentration of the junction area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110861301.3A CN113897829A (en) | 2021-07-29 | 2021-07-29 | Mountain-separating roadbed structure with partially overlapped upper plane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110861301.3A CN113897829A (en) | 2021-07-29 | 2021-07-29 | Mountain-separating roadbed structure with partially overlapped upper plane |
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| CN113897829A true CN113897829A (en) | 2022-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592391A (en) * | 2022-02-10 | 2022-06-07 | 北京工业大学 | 'minimally invasive' combined structure suitable for half-digging and half-filling roadbed on steep cross slope terrain |
| CN114592537A (en) * | 2022-03-22 | 2022-06-07 | 中国电建集团昆明勘测设计研究院有限公司 | Pile plate retaining wall structure suitable for filling side slope and construction method |
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Application publication date: 20220107 |