CN215977307U - Highway side slope supporting construction - Google Patents
Highway side slope supporting construction Download PDFInfo
- Publication number
- CN215977307U CN215977307U CN202121500762.XU CN202121500762U CN215977307U CN 215977307 U CN215977307 U CN 215977307U CN 202121500762 U CN202121500762 U CN 202121500762U CN 215977307 U CN215977307 U CN 215977307U
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- prestressed
- steel bar
- anchor
- steel
- anchor rod
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 97
- 239000010959 steel Substances 0.000 claims abstract description 97
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 238000002955 isolation Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Landscapes
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The utility model discloses a highway side slope supporting structure which comprises prestressed threaded steel bars, wherein grouting pipes are sleeved outside the prestressed threaded steel bars, and the tops of the prestressed threaded steel bars extend out of the grouting pipes to be used for installing anchor rods and anchor heads; the tail end of the prestressed twisted steel is provided with a variable-diameter steel reinforcement cage; and a frame lattice beam is arranged below the anchor head of the anchor rod, and the prestressed threaded steel bar is positioned through the frame lattice beam. The anchor rod effectively solves the problems of small anchor rod bearing capacity, large slope deformation and the like when the traditional anchor rod is used for high slope support of the highway, and ensures the safety of slope construction and operation and maintenance.
Description
Technical Field
The utility model relates to a slope supporting technology, in particular to a highway slope supporting structure.
Background
In recent years, with the development of economy and society of China, the construction of highways is accelerated continuously, and construction mileage is increased year by year, but because of the protection requirements of farmlands and original vegetation, a large number of highways are constructed in mountainous areas. Therefore, the problem of stable support of the high slope of the expressway is obvious. The traditional gentle slope is put, the form of heavy excavation needs the large tracts of land to destroy the vegetation, is no longer suitable. The mode that adopts traditional stock side slope to strut, because of the stock diameter is less, and whole stock diameter is the same, so the stock bearing capacity is less, and the side slope is out of shape great, and the potential safety hazard is outstanding, increases stock length, makes the construction degree of difficulty too big again.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to provide a highway slope supporting structure which can increase the bearing capacity of an anchor rod, improve the supporting stability and reduce the slope deformation.
The technical scheme is as follows: the utility model comprises prestressed threaded steel bars, wherein grouting pipes are sleeved outside the prestressed threaded steel bars, and the tops of the prestressed threaded steel bars extend out of the grouting pipes to be used for installing anchor heads of anchor rods; the tail end of the prestressed twisted steel is provided with a variable-diameter steel reinforcement cage; and a frame lattice beam is arranged below the anchor head of the anchor rod, and the prestressed threaded steel bar is positioned through the frame lattice beam.
The anchor head of the anchor rod comprises a steel bar net piece, a prestressed high-strength threaded rib anchorage device, a spiral rib and a steel sleeve, wherein the steel bar net piece is arranged above the prestressed threaded steel bar at intervals; the spiral rib is arranged at the junction of the prestressed threaded steel bar and the frame lattice beam, and a steel sleeve is sleeved outside the prestressed threaded steel bar below the spiral rib.
The prestressed high-strength threaded rib anchorage is sleeved at the top end of the prestressed threaded rib, and the anchor rod head is fixed on the frame lattice beam through the prestressed high-strength threaded rib anchorage.
The frame lattice beam is in a grid shape, and the anchor head of the anchor rod and the prestressed threaded steel bar below the anchor head are obliquely arranged at the cross-shaped intersection of the frame lattice beam.
The frame lattice beam is composed of a plurality of steel anchor rods, and the steel anchor rods and the prestressed threaded steel bars are arranged at a certain angle.
Anticorrosive isolation tube is established to prestressing force twisted steel's free section cover, and anticorrosive isolation tube is located between prestressing force twisted steel and the slip casting pipe.
A plurality of positioning brackets are arranged at intervals along the length direction of the prestressed twisted steel.
The top of the grouting pipe is sleeved with a transition pipe.
The anchoring section of the prestressed twisted steel is fixedly provided with two fixed-end anchors, and the variable-diameter steel bar cage moves between the two fixed-end anchors.
And a bearing plate is arranged above the fixed end anchorage device below the variable-diameter steel bar cage, and a guide cap is arranged below the fixed end anchorage device.
Has the advantages that: compared with the prior art, the utility model has the beneficial effects that:
(1) by applying prestress or adopting a prestress rod piece, the deformation amount is greatly reduced. The prestressed high-strength thread rib anchor solves the anchoring problem of high-strength steel bars in lattice beams, and has an active effect on improving the safety of the expanded head anchor rod technology;
(2) compared with the traditional anchor rod, the technology is a pressure-bearing type expanded-head anchor rod, the stress is directly transmitted to the anchoring end for distribution, the corrosion hidden danger caused by stress cracking of the concrete of the conventional tension type pile anchor can be effectively avoided, and meanwhile, the diameter-variable steel reinforcement cage technology can enable the anchor rod to be effectively positioned in the expanded section, so that the thickness of a protective layer and the effective bond stress are guaranteed;
(3) the diameter-variable reinforcement cage is added to the expansion head section to form the reinforced concrete expansion head with the reinforcement cage framework, so that the overall stress, the stability of the anchoring section, the pulling resistance and the bearing capacity are greatly improved;
(4) high-strength steel strands or finish-rolled deformed steel bars are adopted to replace common steel bars for tensile resistance, the consumption of concrete is greatly reduced by adopting local enlarged heads at the bottom end compared with the conventional equal-diameter pile body, the material of the variable-diameter reinforcement cage grouting expansion body section is not wasted, and the expansion, compression and compaction effects on the peripheral soil body can be generated, so that the structural stress is optimized to the maximum extent;
(5) the method is suitable for temporary or permanent support projects such as highway slopes under various geological conditions and various levels, and is particularly suitable for projects such as large highway high slopes with high requirements on support deformation, high bearing capacity of single anchor rod and particularly tight construction period.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of a variable diameter steel reinforcement cage of the present invention;
FIG. 3 is a schematic cross-sectional view of a variable diameter steel reinforcement cage of the present invention;
FIG. 4 is a schematic view of the construction of the frame lattice beam of the present invention;
fig. 5 is a schematic cross-sectional view of the anchor head of the anchor rod of the present invention;
fig. 6 is a top view of the anchor head of the rock bolt of the present invention.
Detailed Description
The technical scheme of the utility model is further described in detail by combining the detailed description and the attached drawings.
As shown in fig. 1, the utility model comprises a variable-diameter reinforcement cage 2, prestressed twisted steel 3, a grouting pipe 4, a positioning bracket 5, an anti-corrosion isolation pipe 6, a transition pipe 7, a frame lattice beam 8 and an anchor rod and anchor head 9. The prestressed twisted steel 3 is sleeved with a grouting pipe 4, grouting bodies 1 are poured into the supporting structure from the grouting pipe 4, the grouting bodies 1 are cement mortar or cement paste, and the specific types and the strength of the grouting bodies 1 are selected according to the properties of the slope rock-soil mass. The top of the prestressed twisted steel 3 extends out of the grouting pipe 4 and is used for installing an anchor rod and an anchor head 9. The tail end of the prestressed twisted steel 3 is provided with a variable-diameter steel reinforcement cage 2. Prestressing force twisted steel 3 arranges a plurality of locating support 5 along its length direction interval, and 5 perpendicular to prestressing force twisted steel 3 settings of locating support prevent that slip casting pipe 4 from producing relative displacement outside prestressing force twisted steel 3. Anticorrosive isolation tube 6 is established to prestressing force twisted steel 3's free section cover, and anticorrosive isolation tube 6 is located between prestressing force twisted steel 3 and slip casting pipe 4, makes free section reinforcing bar not have the connection, can exert prestressing force. The top of the grouting pipe 4 is sleeved with a transition pipe 7. A frame lattice beam 8 is arranged below the anchor rod head 9, and the prestressed threaded steel bar 3 is positioned through the frame lattice beam 8.
As shown in fig. 2 and 3, the variable-diameter steel reinforcement cage 2 specifically includes a steel reinforcement cage vertical rib 201, a steel reinforcement cage stirrup 202, a ring-mounted fixer 204, a power spring 205, and an activating mechanism 206, and since the variable-diameter steel reinforcement cage 2 adopts the prior art, the connection relationship and the position relationship of each component are not described again here. The anchoring section of the prestressed twisted steel 3 is fixedly provided with two fixed-end anchorages 203, and the variable-diameter steel reinforcement cage 2 moves between the two fixed-end anchorages 203. A bearing plate 207 is arranged above the fixed end anchorage device 203 below the variable-diameter steel reinforcement cage 2, and a guide cap 208 is arranged below the fixed end anchorage device 203.
As shown in fig. 4 to 6, the frame lattice beam 8 is a cast-in-place reinforced concrete beam, wherein the ratio of the height to the width of the reinforced concrete beam is 1.5 to 3.5, and the specific size of the cross section, the concrete strength and the steel bar model are calculated and determined according to the engineering geological conditions. The frame lattice beam 8 is in a grid shape and is installed close to the side slope, and the anchor rod anchor head 9 and the prestressed threaded steel bar 3 below the anchor rod anchor head are obliquely installed at the cross-shaped intersection of the frame lattice beam 8. The anchor head 9 of the anchor rod comprises a steel bar mesh 901, a prestressed high-strength threaded steel bar anchorage 902, a spiral steel bar 903 and a steel sleeve 904, wherein the steel bar mesh 901 is arranged above the prestressed threaded steel bar 3 at intervals; the spiral reinforcement 903 is arranged at the junction of the prestressed threaded reinforcement 3 and the frame lattice beam 8, and a steel sleeve 904 is sleeved outside the prestressed threaded reinforcement 3 below the spiral reinforcement 903. The prestressed high-strength threaded rib anchorage 902 is sleeved at the top end of the prestressed threaded rib 3, and the anchor rod anchor head 9 is fixed on the frame lattice beam 8 through the prestressed high-strength threaded rib anchorage 902. The frame lattice beam 8 is composed of a plurality of steel anchor rods 801, and the steel anchor rods 801 and the prestressed threaded steel bars 3 are arranged at a certain angle.
The method sequentially comprises the steps of construction organization design, mechanical deployment, in-place debugging of a drilling machine, measurement and control paying-off, primary drilling, enlarged head drilling, assembly of a variable-diameter steel reinforcement cage anchor rod body, lowering of the variable-diameter steel reinforcement cage anchor rod body, grouting construction, prestress application, construction of a frame lattice beam and an anchor head of an anchor body and maintenance, and specifically comprises the following steps:
s1, determining the length, the type of a steel reinforcement cage, a grouting material, the section size of a frame lattice beam and the like of a variable-diameter steel reinforcement cage anchor rod through calculation and analysis by combining the area, the height and the shape of a proposed highway side slope, and protection objects, rock-soil bodies and hydrological conditions around the side slope, and determining the longitudinal and transverse positions of a construction anchor rod;
s2, according to the anchor rod implementation position determined by design, after the anchor rod is measured, set-off and positioned, whether unfavorable geology such as underground pipelines, karst caves and soil caves exists in the construction variable-diameter reinforcement cage anchor rod range is checked. The method comprises the following steps that temporary safety protection is made on a side slope body of a construction site, and a measurement control net and a leveling base point are made;
and S3, after the drilling machine is assembled and debugged, starting primary drilling in place. In the drilling process, a common drill bit is adopted to form a drilling hole with the same diameter, wherein the diameter of the drilling hole is slightly larger than that of a designed common section of the anchor rod; stopping drilling when the designed hole depth is reached, removing the drill rod and the drill bit, and performing expanded section drilling construction by using a special drilling machine and a reaming bit;
and S4, after the expanded section of the drill hole is formed, pulling out the drill rod and the drill bit, and preparing grouting slurry for grouting construction. Grouting while grouting, wherein a pipe drawing head is not less than 5.0m later than grouting, grouting pressure is controlled to be 0.4-0.7 MPa until a large amount of grout flows out of an orifice, sealing by using a cement bag filled with wet clay and a steel plate, tightly plugging, and pulling out a grouting pipe after stable-pressure grouting for 5 min;
s5, after the strength of the grouting body meets the design requirement, adding a cushion steel plate at the drilling hole of the anchor rod, performing pretension, performing formal tensioning according to the design requirement, unloading to 0 when the tensioning load reaches the value of the design requirement, installing a locking plate at the anchor head, and tensioning to lock the locking load;
and S6, binding the reinforcing steel bars of the framework lattice beam template, erecting the template, simultaneously installing the anchor head assembly, pouring framework lattice beam concrete, and maintaining according to design requirements.
The method comprises the steps of drilling a hole on a special mechanical engineering site to form a common anchor rod hole, reaming the bottom of an anchor rod by adopting a special expanding drill bit, assembling a supporting structure after reaming is formed, putting the supporting structure into the reaming after the assembly is finished, then performing grouting construction, applying prestress when the strength of a grouting body meets the design requirement, finally locking the anchor rod, and constructing the frame lattice beam and the anchor rod head. The utility model has the advantages of good corrosion resistance, high tensile bearing capacity, high construction speed, convenient installation and the like, and has outstanding technical and economic benefits.
Claims (10)
1. The utility model provides a highway side slope supporting construction which characterized in that: the anchor rod comprises prestressed threaded steel bars (3), grouting pipes (4) are sleeved outside the prestressed threaded steel bars (3), and the tops of the prestressed threaded steel bars (3) extend out of the grouting pipes (4) to be used for installing anchor rod heads (9); the tail end of the prestressed threaded steel bar (3) is provided with a variable-diameter steel bar cage (2); and a frame lattice beam (8) is arranged below the anchor rod anchor head (9), and the prestressed threaded steel bar (3) is positioned through the frame lattice beam (8).
2. The highway slope supporting structure according to claim 1, wherein: the anchor head (9) of the anchor rod comprises a steel bar mesh (901), a prestressed high-strength threaded steel bar anchorage device (902), a spiral steel bar (903) and a steel sleeve (904), wherein the steel bar mesh (901) is arranged above the prestressed threaded steel bar (3) at intervals; the spiral rib (903) is arranged at the junction of the prestressed threaded steel bar (3) and the frame lattice beam (8), and a steel sleeve (904) is sleeved outside the prestressed threaded steel bar (3) below the spiral rib (903).
3. The highway slope supporting structure according to claim 1, wherein: the prestressed high-strength threaded rib anchorage device (902) is sleeved at the top end of the prestressed threaded rib (3), and the anchor rod anchor head (9) is fixed on the frame lattice beam (8) through the prestressed high-strength threaded rib anchorage device (902).
4. The highway slope supporting structure according to claim 1, wherein: the frame lattice beam (8) is in a grid shape, and the anchor head (9) of the anchor rod and the prestressed threaded steel bar (3) below the anchor head are obliquely arranged at the cross-shaped intersection of the frame lattice beam (8).
5. The highway slope supporting structure according to claim 4, wherein: the frame lattice beam (8) is composed of a plurality of steel anchor rods (801), and the steel anchor rods (801) and the prestressed threaded steel bars (3) are arranged at a certain angle.
6. The highway slope supporting structure according to claim 1, wherein: anticorrosive isolation tube (6) are established to the free section cover of prestressing force twisted steel (3), and anticorrosive isolation tube (6) are located between prestressing force twisted steel (3) and slip casting pipe (4).
7. The highway slope supporting structure according to claim 1, wherein: the prestressed threaded steel bars (3) are provided with a plurality of positioning brackets (5) at intervals along the length direction.
8. The highway slope supporting structure according to claim 1, wherein: the top of the grouting pipe (4) is sleeved with a transition pipe (7).
9. The highway slope supporting structure according to claim 1, wherein: the anchoring section of the prestressed threaded steel bar (3) is fixedly provided with two fixed end anchors (203), and the variable diameter steel bar cage (2) moves between the two fixed end anchors (203).
10. The highway side slope supporting structure according to any one of claims 1 to 9, wherein: and a bearing plate (207) is arranged above the fixed end anchorage device (203) below the variable-diameter steel reinforcement cage (2), and a guide cap (208) is arranged below the fixed end anchorage device (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121500762.XU CN215977307U (en) | 2021-07-02 | 2021-07-02 | Highway side slope supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121500762.XU CN215977307U (en) | 2021-07-02 | 2021-07-02 | Highway side slope supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215977307U true CN215977307U (en) | 2022-03-08 |
Family
ID=80578924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121500762.XU Active CN215977307U (en) | 2021-07-02 | 2021-07-02 | Highway side slope supporting construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215977307U (en) |
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2021
- 2021-07-02 CN CN202121500762.XU patent/CN215977307U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A kind of highway slope support structure Effective date of registration: 20230223 Granted publication date: 20220308 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: Nanjing Ruihua Construction Technology Co.,Ltd. Registration number: Y2023320000095 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20220308 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: Nanjing Ruihua Construction Technology Co.,Ltd. Registration number: Y2023320000095 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A slope support structure for highways Granted publication date: 20220308 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: Nanjing Ruihua Construction Technology Co.,Ltd. Registration number: Y2024320000039 |