CN114575208A - Abrupt slope roadbed structure convenient to prefabricated installation - Google Patents

Abrupt slope roadbed structure convenient to prefabricated installation Download PDF

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Publication number
CN114575208A
CN114575208A CN202210314198.5A CN202210314198A CN114575208A CN 114575208 A CN114575208 A CN 114575208A CN 202210314198 A CN202210314198 A CN 202210314198A CN 114575208 A CN114575208 A CN 114575208A
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CN
China
Prior art keywords
prefabricated panel
foundation
type
slope
shaped prefabricated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210314198.5A
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Chinese (zh)
Inventor
郑六益
莫默
程云
张毅
邹兴普
王亮
范厚贵
郑永
李祚向
邓杰
成启航
巩丽丽
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CREEC Guiyang Survey Design and Research Co Ltd
Original Assignee
CREEC Guiyang Survey Design and Research Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by CREEC Guiyang Survey Design and Research Co Ltd filed Critical CREEC Guiyang Survey Design and Research Co Ltd
Priority to CN202210314198.5A priority Critical patent/CN114575208A/en
Publication of CN114575208A publication Critical patent/CN114575208A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • E01C3/04Foundations produced by soil stabilisation
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • 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

Abstract

The invention relates to the technical field of roadbed construction, in particular to a steep slope roadbed structure convenient for prefabrication and installation, which comprises a slope roadbed and a reinforced structure, wherein the reinforced structure comprises a steel pipe and a steel pipe; the reinforced structure is including enlarging the basis, the prefabricated panel of L type, anchor subassembly and embankment are filled out soil, enlarge basic fixed mounting on the slope road bed, and be located one side of slope road bed, the prefabricated panel fixed mounting of L type is on enlarging the basis, the quantity of the prefabricated panel of L type is a plurality of, a plurality of prefabricated panels of L type overlap in proper order, it has the road bed to fill out soil to fill out on every prefabricated panel of L type, the anchor subassembly is fixed respectively and is enlarged basis and the prefabricated panel of L type, can be to installing steadily the bridge in abrupt slope road bed department, make abrupt slope bridge construction more convenient.

Description

Abrupt slope roadbed structure convenient to prefabrication installation
Technical Field
The invention relates to the technical field of roadbed construction, in particular to a steep slope roadbed structure convenient for prefabrication and installation.
Background
At present, in projects such as mountain area railway, highway, receive topography and landform condition control, there are a large amount of slopes, abrupt slope land section, adopt to put the slope generally to the abrupt slope road bed and be difficult to realize, even can realize putting the slope and fill, it is more to put the required cubic meter of earth and stone of slope filling, area broad in case slope body unstability will endanger road bed wholeness and stability, seriously influences driving safety.
In order to ensure the safety of the structure, the section size of the pile must be increased so as to cause the increase of the engineering investment, in addition, the traditional pile plate wall has low rigidity and limited bearing thrust, the pouring of the structure can only be cast in situ almost, the prefabricated installation can not be realized, and the construction progress is greatly limited by a construction site.
When the bridge is installed on the steep slope roadbed, the excavation of the abutment foundation pit is large for brushing the steep slope, so that the instability of a slope body behind the abutment is easily caused to cause landslide, and the construction of the steep slope bridge is difficult.
Disclosure of Invention
The invention aims to provide a steep slope roadbed structure convenient to prefabricate and install, and aims to solve the technical problem that when a bridge is installed on a steep slope roadbed in the prior art, bridge abutment foundation pit excavation is large in steep slope brushing, so that a slope body behind a bridge abutment is easy to destabilize to cause landslide, and steep slope bridge construction is difficult.
In order to achieve the purpose, the invention adopts a steep slope roadbed structure which is convenient to prefabricate and install and comprises a slope roadbed,
the structure also comprises a reinforcing structure;
the reinforced structure is including enlarging basis, the prefabricated panel of L type, anchor subassembly and embankment and filling soil, enlarge basic fixed mounting on the slope road bed, and be located one side of slope road bed, the prefabricated panel fixed mounting of L type is in on the enlargement basis, the quantity of the prefabricated panel of L type is a plurality of, and is a plurality of the prefabricated panel of L type overlaps in proper order, every it has to fill on the prefabricated panel of L type the road bed is filled soil, the anchor subassembly is fixed respectively enlarge the basis with the prefabricated panel of L type.
The reinforced structure further comprises an expanded foundation protruding stop block, wherein the expanded foundation protruding stop block is fixedly installed on the expanded foundation, fixedly connected with the L-shaped prefabricated panel and located on one side, close to the L-shaped prefabricated panel, of the expanded foundation.
The reinforced structure further comprises a concrete sealing layer, wherein the concrete sealing layer is arranged between the enlarged foundation and the L-shaped prefabricated panel and fixedly connected with the enlarged foundation and the L-shaped prefabricated panel respectively.
The reinforced structure further comprises an inverted filter layer, wherein the inverted filter layer is arranged on the L-shaped prefabricated panel and is positioned on one side, close to the embankment filling soil, of the L-shaped prefabricated panel.
Wherein, reinforced structure still includes geogrid, geogrid sets up in the embankment banket.
The expansion foundation is provided with expansion joints, the expansion joints are arranged on one side, close to the L-shaped prefabricated panel, of the expansion foundation, the number of the expansion joints is multiple, and the expansion joints are arranged in parallel at intervals.
The enlarged base protruding block is provided with a water drainage hole, and the water drainage hole penetrates through the enlarged base protruding block in the direction towards the L-shaped prefabricated panel.
According to the steep slope roadbed structure convenient to prefabricate and install, the slope roadbed is leveled and tamped, the expanded foundation is paid out and fixed at a fixed point on the slope roadbed, the expanded foundation is excavated according to the paid-out fixed point, the foundation anchor rod is installed in the expanded foundation, the reinforcing steel bars of the expanded foundation are bound, concrete is poured, the bottom of the prefabricated L-shaped prefabricated panel is installed on the expanded foundation, the front end of the L-shaped prefabricated panel is abutted and fixed with the expanded foundation protruding stop block, the L-shaped prefabricated panel is overlapped and fixed, and the roadbed filling soil is filled in the L-shaped prefabricated panel until the L-shaped prefabricated panel reaches the level of the roadbed of a pavement, so that a bridge can be stably installed at the position of the steep slope roadbed, and construction of a steep slope bridge is more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic cross-sectional view of a steep roadbed structure facilitating prefabrication and installation according to a first embodiment of the invention.
Fig. 2 is a sectional view a-a of the first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a steep roadbed structure facilitating prefabrication and installation according to a second embodiment of the invention.
Fig. 4 is a schematic front view of a steep-slope roadbed structure facilitating prefabrication and installation according to a second embodiment of the invention.
Fig. 5 is a cross-sectional view of an L-shaped prefabricated panel of a steep slope roadbed structure convenient for prefabricating and installing according to the second embodiment of the invention.
Fig. 6 is a front view showing an L-shaped prefabricated panel of a steep hill roadbed structure for facilitating the prefabricated installation according to the second embodiment of the present invention.
Fig. 7 is a magnified view of the second embodiment of the present invention.
Fig. 8 is a B-B side elevational view of an enlarged base male stop of a second embodiment of the present invention.
In the figure: 101-slope roadbed, 102-enlarged foundation, 103-L-shaped prefabricated panels, 104-anchoring assembly, 105-embankment filling, 106-enlarged foundation protruding block, 107-concrete sealing layer, 108-geogrid, 109-foundation anchor rod, 110-anchor cable, 111-reserved anchor cable hole, 112-step digging line, 114-earth-rock boundary line, 201-inverted filter layer, 202-expansion joint and 203-drainage hole.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and the embodiments described below with reference to the accompanying drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention.
The first embodiment of the present application is:
referring to fig. 1 and 2, the present invention provides a steep slope roadbed structure convenient for prefabrication and installation, comprising a slope roadbed 101,
the structure also comprises a reinforcing structure;
the reinforced structure comprises an enlarged foundation 102, L-shaped prefabricated panels 103, anchoring assemblies 104 and embankment filling soil 105, wherein the enlarged foundation 102 is fixedly installed on the slope roadbed 101 and located on one side of the slope roadbed 101, the L-shaped prefabricated panels 103 are fixedly installed on the enlarged foundation 102, the L-shaped prefabricated panels 103 are multiple in number and multiple in number, the L-shaped prefabricated panels 103 are sequentially overlapped, each L-shaped prefabricated panel 103 is filled with the roadbed filling soil, and the anchoring assemblies 104 are respectively used for fixing the enlarged foundation 102 and the L-shaped prefabricated panels 103. The reinforced structure further comprises an enlarged foundation protruding stop 106, wherein the enlarged foundation protruding stop 106 is fixedly installed on the enlarged foundation 102, is fixedly connected with the L-shaped prefabricated panel 103, and is positioned on one side, close to the L-shaped prefabricated panel 103, of the enlarged foundation 102. The reinforced structure further comprises a concrete sealing layer 107, wherein the concrete sealing layer 107 is arranged between the enlarged foundation 102 and the L-shaped prefabricated panel 103 and fixedly connects the enlarged foundation 102 and the L-shaped prefabricated panel 103 respectively. The reinforcing structure further comprises a geogrid 108, the geogrid 108 being arranged within the embankment filling 105. The anchoring assembly 104 comprises a foundation anchor rod 109 and an anchor cable 110, one end of the foundation anchor rod 109 is connected with the enlarged foundation 102, and the other end of the foundation anchor rod 109 extends into the slope subgrade 101 to be fixed; one end of the anchor cable 110 is connected with the L-shaped prefabricated panel 103, and the other end of the anchor cable 110 extends into the slope subgrade 101 to be fixed. The L-shaped prefabricated panel 103 is provided with a reserved anchor cable hole 111, the reserved anchor cable hole 111 is arranged on one side of the L-shaped prefabricated panel 103 close to the anchor cable 110, and one end of the anchor cable 110 extends into the reserved anchor cable hole 111.
The enlarged foundation 102 is cast in place by reinforced concrete, the foundation anchor rods 109 are arranged in the enlarged foundation 102, anchor rod bodies of the foundation anchor rods 109 are made of HRB phi 32 steel bars, 12 foundation anchor rods 109 are arranged in each section of the enlarged foundation 102, the anchor rods are 10.0m long, the anchor rod drilling diameter phi is 110mm, the anti-sliding and anti-overturning capacities of the enlarged foundation 102 are improved, the enlarged foundation 102 and the enlarged foundation protruding stop blocks 106 can be cast after the foundation anchor rods 109 are cast, the enlarged foundation protruding stop blocks 106 are arranged on the top surfaces of the enlarged foundation 102, the enlarged foundation protruding stop blocks 106 and the foundation anchor rods 109 are cast in place to form a whole, the L-shaped prefabricated panel 103 is limited by the enlarged foundation protruding stop blocks 106, and the structure is safe and stable; the enlarged base 102 is 4m high; the L-shaped prefabricated panel 103 is prefabricated by reinforced concrete, and a single panel is 5m long, 4m high and 0.5m thick; the reserved anchor cable hole 111 is formed in the middle of the L-shaped prefabricated panel 103, and a phi 130mm steel pipe is pre-buried in the reserved anchor cable hole 111; when the roadbed is filled with soil, the space between the L-shaped prefabricated panel 103 at the bottommost part and the excavated step line 1129 is sealed by the concrete sealing layer 107 with the same type as the L-shaped prefabricated panel 103, so that the embankment is permeable and the basement is not infiltrated and softened. Filling and compacting roadbed filling in 2m layers, and paving one layer of geogrid 108 every 2m from the bottom surface of the L-shaped prefabricated panel 103; the geogrid 108 is preferably a two-way welding polyester geogrid 108 so as to improve the overall stability and the shear failure resistance of the roadbed, and the longitudinal and transverse tensile strength of the geogrid 108 is not less than 80 kN/m; and (3) the L-shaped prefabricated panel 103 is lifted from the second row, when the roadbed is filled with soil and the soil is filled to the top surface of the L-shaped prefabricated panel 103, drilling the anchor cable 110 on the L-shaped prefabricated panel 103, and completing tensioning and locking of the anchor cable 110, wherein the inclination angle of the anchor cable 110 is preferably 15 degrees, and the length of the anchor cable 110 is determined according to calculation. And after the construction of the anchor cable 110 is finished, continuously filling soil upwards until the height of the roadbed surface is reached.
In the installation process, firstly, the slope roadbed 101 is leveled and then tamped, then the expanded foundation 102 is subjected to line laying and point fixing on the slope roadbed 101, the expanded foundation 102 is excavated according to line laying and point fixing points, then the foundation anchor rod 109 is installed in the expanded foundation 102, reinforcing steel bars of the expanded foundation 102 are bound, then concrete is poured, after the expanded foundation 102 is cast in place and formed to reach initial setting, the expanded foundation protruding stop block 106 is poured, then the bottom of the prefabricated L-shaped prefabricated panel 103 is installed on the expanded foundation 102, the front end of the L-shaped prefabricated panel 103 is abutted and fixed with the expanded foundation protruding stop block 106, the rear end of the L-shaped prefabricated panel 103 is sealed by the concrete sealing layer 107, the L-shaped prefabricated panel 103 is overlapped and fixed, and then the roadbed filling is filled in the L-shaped prefabricated panel 103, until the road surface subgrade elevation is reached, the bridge can be stably installed at the steep slope subgrade, so that the construction of the steep slope bridge is more convenient.
The second embodiment of the present application is:
referring to fig. 3 to 8, on the basis of the first embodiment, the expansion foundation 102 of this embodiment has expansion joints 202, the expansion joints 202 are disposed on one side of the expansion foundation 102 close to the L-shaped prefabricated panel 103, the number of the expansion joints 202 is plural, and the plural expansion joints 202 are disposed in parallel at intervals. The enlarged base projected block 106 has a drain hole 203, and the drain hole 203 penetrates the enlarged base projected block 106 in a direction toward the L-shaped precast panel 103. The reinforced structure further comprises an inverted filter layer 201, wherein the inverted filter layer 201 is arranged on the L-shaped prefabricated panel 103 and is positioned on one side, close to the embankment filling 105, of the L-shaped prefabricated panel 103.
The expansion joints 202 are arranged every 15m along the line direction on the expansion foundation 102, the expansion joints 202 are cut by using a cutting wheel, and the cross sections of the expansion joints are linearly distributed, so that the influence of expansion and contraction on the structure caused by heat and cold of the expansion foundation 102 is reduced when the temperature of the outside of the expansion foundation 102 is raised and lowered; the drainage hole 203 is arranged in the enlarged foundation protruding block 106, the drainage slope of the drainage hole 203 is 4%, and a pre-buried PVC plastic drainage pipe with phi equal to 100mm is inserted; the reverse filtering layer 201 is arranged behind the L-shaped prefabricated panel 103, so that piping and soil flowing are prevented when seepage water is discharged, the reverse filtering layer 201 is made of bagged sand gravel, and the thickness of the reverse filtering layer is 0.3 m. After the inverted filter 201 is arranged, roadbed filling can be carried out, so that the anti-permeability performance of the roadbed can be enhanced.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A steep slope roadbed structure convenient for prefabrication and installation comprises a slope roadbed and is characterized in that,
the structure also comprises a reinforcing structure;
the reinforced structure is including enlarging basis, the prefabricated panel of L type, anchor subassembly and embankment and filling soil, enlarge basic fixed mounting on the slope road bed, and be located one side of slope road bed, the prefabricated panel fixed mounting of L type is in on the enlargement basis, the quantity of the prefabricated panel of L type is a plurality of, and is a plurality of the prefabricated panel of L type overlaps in proper order, every it has to fill on the prefabricated panel of L type the road bed is filled soil, the anchor subassembly is fixed respectively enlarge the basis with the prefabricated panel of L type.
2. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,
the reinforced structure further comprises an expanded foundation protruding stop block, wherein the expanded foundation protruding stop block is fixedly installed on the expanded foundation, fixedly connected with the L-shaped prefabricated panel and located on one side, close to the L-shaped prefabricated panel, of the expanded foundation.
3. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,
the reinforced structure further comprises a concrete sealing layer, wherein the concrete sealing layer is arranged between the enlarged foundation and the L-shaped prefabricated panel and fixedly connected with the enlarged foundation and the L-shaped prefabricated panel respectively.
4. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,
the reinforced structure further comprises an inverted filter layer, wherein the inverted filter layer is arranged on the L-shaped prefabricated panel and is positioned on one side, close to the embankment filled soil, of the L-shaped prefabricated panel.
5. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,
the reinforced structure further comprises a geogrid, and the geogrid is arranged in the embankment filled soil.
6. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,
the expansion foundation is provided with expansion joints, the expansion joints are arranged on one side, close to the L-shaped prefabricated panel, of the expansion foundation, the number of the expansion joints is multiple, and the expansion joints are arranged in parallel at intervals.
7. A steep hill subgrade structure facilitating prefabrication and installation according to claim 2,
the enlarged base protruding stop block is provided with a water drainage hole, and the water drainage hole penetrates through the enlarged base protruding stop block towards the direction of the L-shaped prefabricated panel.
CN202210314198.5A 2022-03-28 2022-03-28 Abrupt slope roadbed structure convenient to prefabricated installation Pending CN114575208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210314198.5A CN114575208A (en) 2022-03-28 2022-03-28 Abrupt slope roadbed structure convenient to prefabricated installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210314198.5A CN114575208A (en) 2022-03-28 2022-03-28 Abrupt slope roadbed structure convenient to prefabricated installation

Publications (1)

Publication Number Publication Date
CN114575208A true CN114575208A (en) 2022-06-03

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115305921A (en) * 2022-08-19 2022-11-08 中交路桥建设有限公司 Construction method for precast concrete foundation pit slope protection
CN115897318A (en) * 2022-09-30 2023-04-04 中国电建集团贵州电力设计研究院有限公司 Ecological restoration method for partial collapse of semi-excavated and semi-filled road

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115305921A (en) * 2022-08-19 2022-11-08 中交路桥建设有限公司 Construction method for precast concrete foundation pit slope protection
CN115897318A (en) * 2022-09-30 2023-04-04 中国电建集团贵州电力设计研究院有限公司 Ecological restoration method for partial collapse of semi-excavated and semi-filled road

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