CN108222035B - Stable highway subgrade ecological slope protection and construction method thereof - Google Patents

Stable highway subgrade ecological slope protection and construction method thereof Download PDF

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Publication number
CN108222035B
CN108222035B CN201810053616.3A CN201810053616A CN108222035B CN 108222035 B CN108222035 B CN 108222035B CN 201810053616 A CN201810053616 A CN 201810053616A CN 108222035 B CN108222035 B CN 108222035B
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base
slope
slope protection
layer
concrete ring
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CN108222035A (en
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齐昌广
张智超
郑金辉
赖文杰
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Fujian Geological Engineering Investigation Institute
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Fujian Geological Engineering Investigation Institute
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • E02D17/205Securing of slopes or inclines with modular blocks, e.g. pre-fabricated
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23Dune restoration or creation; Cliff stabilisation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Revetment (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention relates to a stable highway subgrade ecological slope protection and a construction method thereof, wherein the ecological slope protection consists of a slope protection platform, a longitudinal drainage channel, a transverse drainage channel, a regular hexagonal concrete ring, a base and facing bricks, and the stability of a subgrade slope is ensured by using anchor rods, a gravel layer, bearing steel columns, an oblique reinforcing beam and a water permeable hole; the base is fixed through the anchor, and its surface is equipped with L type component, utilizes the vegetation hole that the face brick formed to plant green vegetation, cooperates the drainage channel on domatic surface, has guaranteed the water and soil balance of roadbed slope. The invention has the main advantages that: the gravel layer is permeable, water in the roadbed slope is discharged through permeable holes on the outer surface of the slope, and the slope water level is ensured to be in a safe range, so that landslide disasters of the deep slope caused by high water level are avoided; the green vegetation planted on the slope can solve the disasters of collapse of shallow layers of the slope, landslide and the like caused by scouring such as heavy rainfall and the like.

Description

Stable highway subgrade ecological slope protection and construction method thereof
Technical Field
The invention relates to a novel highway subgrade slope protection structure, in particular to a stable highway subgrade ecological slope protection structure and a construction method thereof.
Background
Along with the high-speed development of the economy in China, the construction of various highways is performed all over the country, and in the process, the slope protection of the highway subgrade is taken as an important structure for ensuring the stability of the subgrade, so that more attention is paid; along with the current popularization of the green development concept, the ecological slope protection technology is widely applied to highway engineering. The traditional ecological slope protection is only to plant some green vegetation on the roadbed slope, and the stability of the roadbed slope is not considered, which is far from sufficient in coastal soft soil areas.
Referring to related documents, the present patent mainly carries out innovative researches on slope protection brick structures of a slope, such as a foundation block (CN 201621375290.9) of an ecological slope protection retaining wall concrete block, a jacking block (CN 201621375306.6) of the ecological slope protection retaining wall concrete block and an interlocking ecological slope protection construction process (CN 201510064880.3) are all novel slope protection brick structures, the construction of cement mortar layers of each slope protection brick is avoided through mechanical occlusion of upper and lower or adjacent two blocks, and green vegetation is sowed in gaps of the slope protection bricks to achieve the purpose of keeping water and soil balance of a roadbed slope. The stability of the roadbed slope and the ecological slope protection concept are considered in the high-strength highway slope protection (CN 201621276921.1), but the construction procedure is complicated, the construction amount is large, and the method is not suitable for large-scale popularization and application.
In view of this, although studies on ecological slope protection and slope stability are currently very popular, there is no report on a document combining both studies. Therefore, aiming at the situation, the defect of difficult inspection and maintenance of the current roadbed slope is comprehensively considered, and the novel, green and ecological roadbed slope with high stability and the construction method thereof are very important.
Disclosure of Invention
The invention aims to overcome the defects and provide a stable ecological slope protection for a highway subgrade and a construction method thereof.
Another object of the invention is to provide a stable ecological slope protection for highway subgrade. The invention aims at realizing the following technical scheme:
the invention relates to a stable highway subgrade ecological slope protection which comprises a plurality of upper and lower superimposed filling layers, regular hexagon concrete rings, a base and facing bricks, wherein the cross section of each filling layer is of a trapezoid structure, the width of the bottom of each upper filling layer is smaller than that of the top of each lower filling layer, a slope protection platform is formed by the part, which is more than the lower surface of each upper filling layer, of the upper surface of each lower filling layer, a transverse drainage channel is formed on the slope protection platform, a longitudinal drainage channel is formed on the inclined surface of each filling layer, and a vertical bearing steel column is arranged at each slope protection platform; the regular hexagon concrete ring is arranged on the inclined plane of the filling layer, the bearing structural body and the inclined reinforcing beam are arranged on the inner side of the regular hexagon concrete ring, the inclined reinforcing beam is inserted into the filling layer and connected with the bearing steel column, the bottom of the hexagon concrete ring is provided with the anchor rod and the water permeable hole, and the anchor rod penetrates through the bearing structural body and is inserted into the filling layer; the base lay in regular hexagon concrete ring, the tapestry brick is laid at the base upper surface, all is equipped with the vegetation hole in base and the tapestry brick, is equipped with green vegetation in the vegetation hole.
Preferably, the transverse drainage channels are concave, the gradient is 5%, and two ends of the transverse drainage channels are respectively connected with the longitudinal drainage channels on two sides.
Preferably, the bottom edge of the regular hexagon concrete ring is provided with an anchor rod hole, and the bearing structure body and the bottom edge of the regular hexagon concrete ring are in an integrated structure. The bearing structure body is matched with the anchor rods to bear the weight of the whole regular hexagonal concrete ring.
Preferably, the base is in a regular triangle shape, the size of the facing bricks covered on the upper surface of the base is matched with that of the base, the base is uniformly arranged in the cavity inside the regular hexagon concrete ring, and the bottom edges of the adjacent bases are connected through anchor nails.
Preferably, the two sides of the upper surface of the base are provided with L-shaped components, the opposite positions of the lower surface of the facing brick are provided with L-shaped grooves, and the L-shaped components are inserted into the L-shaped grooves.
Preferably, the lower part of each filled soil layer is provided with a gravel layer, and the gravel layer is connected with the permeable holes, so that the stability of the soil slope is ensured.
The construction method of the stable highway subgrade ecological slope protection comprises the following steps:
(1) Firstly filling a gravel layer at the bottom layer of a roadbed, installing a bearing steel column, and fixedly connecting a reinforcing beam in the bottom layer filled soil layer;
(2) Continuously filling soil to a certain height to form a slope protection platform, arranging a longitudinal drainage channel and a transverse drainage channel, and supporting a mould on a slope to pour a bearing structure body and a regular hexagon concrete ring so as to connect an inclined reinforcing beam and the regular hexagon concrete ring;
(3) Constructing an anchor rod by utilizing the reserved anchor rod hole, and then setting a second layer of gravel layer;
(4) Repeating the steps 1-3 to finish the construction of all the earth filling layers;
(5) Paving a base in a space surrounded by the regular hexagonal concrete ring;
(6) And finally, covering the upper surface of the base with facing bricks, and then planting green vegetation in the vegetation holes to finish the construction of ecological slope protection.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. the slope protection platform designed by the invention provides convenience for patrol maintenance work in the future, and a transverse drainage channel is additionally arranged on the slope protection platform, so that drainage of the side slope of the roadbed is ensured.
2. The double-layer gravel layer is arranged, the permeable holes on the outer surface of the straight-through side slope are matched, the side slope deep landslide hazard caused by high water level is avoided, and the anti-overturning capacity of the side slope is further enhanced by matching with the bearing columns and the inclined reinforcing beams; the green vegetation planted on the slope can solve the disasters of collapse of shallow layers of the slope, landslide and the like caused by scouring such as heavy rainfall and the like.
3. The double-layer slope protection brick structure adopted by the invention not only avoids the workload of cement mortar layer construction on each slope protection brick on the premise of ensuring the stability of the slope protection brick, but also reduces the pressure on the regular hexagon concrete ring and ensures the stability of the slope surface because of the light concrete material of the base.
Drawings
FIG. 1 is a slope view of an ecological slope protection structure of a roadbed slope;
FIG. 2 is a front view of an ecological slope of a roadbed slope;
FIG. 3 is a schematic view of a regular hexagonal concrete ring;
FIG. 4 is a view showing the effect of the completion of the assembly of the base;
FIG. 5 is a view showing the effect of finishing the assembly of the face bricks;
FIG. 6 is a schematic view of an L-shaped member, L-shaped groove.
Graphic labeling: 1-a slope protection platform; 2-a longitudinal drain channel; 3-a lateral drainage channel; 4-regular hexagonal concrete rings; 5-anchor rods; 6-anchoring; 7-a base; 8-facing bricks; 9-vegetation holes; 10-green vegetation; an 11-L-shaped member; a 12-L-shaped groove; 13-a load-bearing structure; 14-a layer of gravel; 15-bearing steel columns; 16-oblique reinforcing beams; 17-water permeable holes.
The specific embodiment is as follows:
the invention will be further understood by reference to the following examples which are given to illustrate the invention but are not intended to limit the scope of the invention.
As shown in FIG. 1, if the roadbed side slope is 3m in height and 4.6m in width, the slope protection platform 1 is 0.3m in width, and the slope surface is 45 degrees. During construction, foundation bolts are pre-buried at selected positions, two bearing steel columns 15 with the diameter of 20cm are firstly installed, the distance is 1.3m, and then roadbed filling is carried out. At the initial stage of roadbed filling, a 20cm gravel layer 14 is firstly filled at the edge of the roadbed, after compaction, two inclined reinforcing beams 16 are welded on a bearing steel column 15, the cross section size of each inclined reinforcing beam 16 is 5cm, the lengths of the inclined reinforcing beams 16 are 136cm and 63cm respectively, the bearing steel column 15 and the inclined reinforcing beams 16 are made of stainless steel materials and are coated with waterproof coatings, and temporary supports can be arranged to support the two inclined reinforcing beams 16.
And by combining with the figures 1 and 2, the soil is continuously filled to the height of 1m, so that the slope surface is ensured to be at an angle of 45 degrees. The slope protection platform 1 with the width of 0.3m is arranged on the outer side of a roadbed, the slope protection platform is internally provided with a transverse drainage channel 3 which is concave, the top view is 15cm square, four sides are concave by 5% in gradient, two ends of the transverse drainage channel 3 are connected with the longitudinal drainage channels 2, the longitudinal drainage channels 2 are concave, the width is 25cm, the height is 10cm, the slope is measured and paid off, the edge length is 116cm, the slope soil of a regular hexagon with the thickness of 5cm is dug, a regular hexagon groove is formed, and the bottom edge is dug to be 10cm. The regular hexagon concrete ring 4 and the bearing structure body 13 are prefabricated in a factory to form a whole, a supporting hole for inserting and supporting the inclined reinforcing beam 16 is reserved on the bottom surface of the waist of the regular hexagon concrete ring 4, the prefabricated regular hexagon concrete ring 4 and the bearing structure body 13 are accurately hoisted into the regular hexagon groove by using a crane, and the end part of the inclined reinforcing beam 16 is ensured to be inserted into the supporting hole. At this time, as shown in fig. 3, the diameter of the permeable hole of the regular hexagonal concrete ring 4 is 3cm, and the anchor rod hole on the bottom edge of the permeable hole is utilized for fixing, that is, the anchor rod 5 is arranged at the position of the anchor rod hole to realize connection between the regular hexagonal concrete ring 4 and the filled soil layer, in this embodiment, the diameter of the anchor rod is 5cm, the length is 50cm, and the construction is a normal anchor rod construction step, which is not described herein.
And then continuously filling a gravel layer with the length of 20cm on the premise of keeping the slope of the slope unchanged, filling a layer of filling soil, welding a third inclined reinforcing beam 16 according to the drawing, wherein the cross section of the third inclined reinforcing beam 16 is square with the size of 3 x 3cm and the length of 63cm. And the regular hexagon concrete ring 4 and the bearing structure body 13 at the side slope position of the second layer of the filling layer are installed one by one.
Referring to fig. 4 to 6, a base 7 is installed in a space surrounded by the regular hexagonal concrete ring 4, the base 7 is made of light concrete material, is in a regular triangle shape, has a thickness of 3cm, has an outer side length of 116cm and an inner side length of 66cm, and is provided with an L-shaped member 11 at the middle part of two waists of the upper surface. During the process of installing the base 7, the bottom edges of the two adjacent bases 7 are fixedly connected by the anchor nails 6, and the installation effect is shown in fig. 4.
Finally, the facing brick 8 is arranged on the base 7, the dimension and the section size of the facing brick 8 are the same as those of the base 7, the thickness is only 2cm, and the base is buckled by the L-shaped groove 12 on the back surface of the facing brick. Next, green vegetation 10 is planted in the vegetation holes 9 within 66cm side length as shown in fig. 5. And finally, the construction is finished to obtain the ecological slope protection form of the highway subgrade with the front surface as shown in figure 2.
The present invention has been described in detail with reference to the embodiments, but the description is only the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention should be considered as falling within the scope of the present invention.

Claims (3)

1. The utility model provides a stable highway subgrade ecological bank protection which characterized in that: the slope protection platform comprises a plurality of upper and lower superimposed filling layers, regular hexagon concrete rings, a base and facing bricks, wherein the cross section of each filling layer is of a trapezoid structure, the width of the bottom of each upper filling layer is smaller than that of the top of each lower filling layer, the upper surface of each lower filling layer is provided with a part of the lower surface of each upper filling layer to form a slope protection platform, the slope protection platform is provided with a transverse drainage channel, the inclined surface of each filling layer is provided with a longitudinal drainage channel, and the slope protection platform is provided with a vertical bearing steel column; the regular hexagon concrete ring is arranged on the inclined plane of the filling layer, the bottom edge of the regular hexagon concrete ring is provided with an anchor rod hole, the inner side of the regular hexagon concrete ring is provided with a bearing structure body and an inclined reinforcing beam, the bearing structure body and the bottom edge of the regular hexagon concrete ring are in an integrated structure, the inclined reinforcing beam is inserted into the filling layer and connected with a bearing steel column, the bottom of the hexagon concrete ring is provided with anchor rods and permeable holes, the lower part of each filling layer is provided with a gravel layer, the gravel layer is connected with the permeable holes, and the anchor rods penetrate through the bearing structure body and are inserted into the filling layer; the base lay in regular hexagon concrete ring, the base is regular triangle shape, the size of the veneer brick of cover at base upper surface all with the size phase-match of base, the base evenly arranges in regular hexagon concrete ring inside cavity, the base of adjacent base passes through the anchor nail to be connected, base upper surface both sides limit is equipped with L type component, the facing brick is laid at the base upper surface, facing brick lower surface relative position is equipped with L type groove, L type component inserts L type inslot portion, all be equipped with vegetation hole in base and the facing brick, be equipped with green vegetation in the vegetation hole.
2. The stabilized highway subgrade ecological slope protection of claim 1, wherein: the transverse drainage channels are concave, the gradients are 5%, and two ends of the transverse drainage channels are respectively connected with the longitudinal drainage channels on two sides.
3. A construction method of a stable highway subgrade ecological slope protection based on the method of claim 1, which is characterized by comprising the following steps:
(1) Firstly filling a gravel layer at the bottom layer of a roadbed, installing a bearing steel column, and fixedly connecting a reinforcing beam in the bottom layer filled soil layer;
(2) Continuously filling soil to a certain height to form a slope protection platform, arranging a longitudinal drainage channel and a transverse drainage channel, and supporting a mould on a slope to pour a bearing structure body and a regular hexagon concrete ring so as to connect an inclined reinforcing beam with the regular hexagon concrete ring, wherein an anchor rod and a permeable hole are arranged at the bottom of the hexagon concrete ring, and a gravel layer is connected with the permeable hole;
(3) Constructing an anchor rod by utilizing the reserved anchor rod hole, and then setting a second layer of gravel layer;
(4) Repeating the steps 1-3 to finish the construction of all the earth filling layers;
(5) Paving a base in a space surrounded by the regular hexagonal concrete ring, wherein the base is in a regular triangle shape, the sizes of facing bricks covered on the upper surface of the base are matched with those of the base, the base is uniformly arranged in a cavity inside the regular hexagonal concrete ring, the bottom edges of the adjacent bases are connected through anchor nails, and L-shaped components are arranged on the two side edges of the upper surface of the base;
(6) And finally, covering the upper surface of the base with a facing brick, wherein an L-shaped groove is formed in the opposite position of the lower surface of the facing brick, and an L-shaped component is inserted into the L-shaped groove and then green vegetation is planted in the vegetation hole to finish the construction of ecological slope protection.
CN201810053616.3A 2018-01-19 2018-01-19 Stable highway subgrade ecological slope protection and construction method thereof Active CN108222035B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109281235A (en) * 2018-11-29 2019-01-29 西南交通大学 A kind of volcanic slag railway bed and its process for constructing
CN113605314B (en) * 2021-08-12 2022-08-16 徐雁飞 Ecological slope protection device in yellow river that can guarantee vegetation normal growth

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CN203475448U (en) * 2013-09-17 2014-03-12 杜贵金 Road slope protection device
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