CN219808389U - Prestressed anchorage of rock slope anti-shearing supporting structure for hole plug - Google Patents
Prestressed anchorage of rock slope anti-shearing supporting structure for hole plug Download PDFInfo
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- CN219808389U CN219808389U CN202223417465.6U CN202223417465U CN219808389U CN 219808389 U CN219808389 U CN 219808389U CN 202223417465 U CN202223417465 U CN 202223417465U CN 219808389 U CN219808389 U CN 219808389U
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- hole plug
- reinforced concrete
- anchor
- anchoring hole
- supporting structure
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- 239000011435 rock Substances 0.000 title claims abstract description 42
- 238000010008 shearing Methods 0.000 title 1
- 238000004873 anchoring Methods 0.000 claims abstract description 80
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 45
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 239000011378 shotcrete Substances 0.000 claims description 7
- 238000007596 consolidation process Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model provides a shear supporting structure of a prestressed anchorage hole plug of a rock slope, belonging to the field of slope support engineering. Comprising the following steps: the prestressed anchor cable, reinforced concrete anchor hole stopper, reinforced concrete anchor pier and anchor cable stress gauge, its characterized in that: the prestressed anchor cable and the reinforced concrete anchoring hole plug jointly form a composite shear-resistant active supporting structure, the reinforced concrete anchoring hole plug penetrates through the sliding fracture surface and is embedded in the stable raw rock, and the prestressed anchor cable anchoring section is positioned in the deep stable raw rock of the side slope body, and the embedded length is not less than 2 times of hole width; the outer anchor head is anchored to the reinforced concrete anchor pier, and an anchor rope stress meter is arranged at the anchor head. The utility model utilizes the characteristic of high tensile strength of the prestressed anchor cable, the anchoring section of the prestressed anchor cable penetrates into the stable rock body deeper in the bottom of the hole, and the principle of the friction anchor rod is used for forming a constraint function on the sliding body of the high-large side slope, so that the functions of large cross section, high-strength prestressing and deep reinforcement are realized.
Description
Technical Field
The utility model belongs to the field of slope support engineering, and in particular relates to a rock slope prestress anchor hole plug shear support structure which is formed by a prestress anchor cable and a reinforced concrete anchor hole plug.
Background
At present, the existing anchoring hole plug belongs to a passive supporting structure, and the anchoring hole plug only provides anti-slip force after a sliding body enters a critical state or generates great deformation; the steel bars in the anchoring hole plugs are arranged in the same length and are not differentiated according to the geological conditions of the slope body, so that insufficient structural strength or waste can be caused; an anchor hole plug filled with reinforced concrete may obstruct drainage of the slope; the method for monitoring the structural stress change of the anchoring hole plug by singly adopting the rebar meter has obvious defects, and sometimes transmits error signals to influence the judgment of engineering technicians on whether the anchoring hole plug is stable.
Disclosure of Invention
The utility model provides a rock slope prestress anchoring hole plug shear supporting structure, which can effectively solve the technical problems in the background technology.
In order to solve the problems, the utility model adopts the following technical scheme: a rock slope prestress anchoring hole plug shear supporting structure comprises: the prestressed anchor cable, the reinforced concrete anchoring hole plug, the reinforced concrete anchor pier and the anchor cable stress gauge jointly form a composite shear-resistant active supporting structure, the reinforced concrete anchoring hole plug penetrates through a sliding fracture surface and is embedded in a stable raw rock body, and the prestressed anchor cable anchoring section is positioned in the deep stable raw rock of the side slope body, wherein the embedded length is not less than 2 times of the hole width; the outer anchor head is anchored to the reinforced concrete anchor pier, and an anchor rope stress meter is arranged at the anchor head.
Further, the anchoring hole plug comprises a straight wall arched tunnel, an axial stress steel bar and an annular stirrup, backfill concrete in the tunnel, a consolidation grouting hole in a loose area around the tunnel, a deep anchoring hole plug expansion end (3), a shallow reinforcement anchor rod, a water discharge hole at a fault fracture zone (slip fracture surface), a drain pipe in the hole plug and a concrete strain gauge, wherein the straight wall arched tunnel is horizontally arranged and the axis of the straight wall arched tunnel is perpendicular to the slip fracture surface; the axial stress steel bars comprise deformed bars and steel arches.
Further, the reinforced concrete anchoring hole plug is arranged horizontally or inclined inwards, the hole axis direction is parallel to the sliding direction of the sliding body, the axis is orthogonal to the sliding surface, a vertical water draining hole is formed in the intersection section of the reinforced concrete anchoring hole plug and the fault breaking zone, and the water draining hole is connected with an internal drain pipe and is discharged out of the hole plug.
Further, the reinforced concrete anchoring hole plug is provided with a section expanding end in the deep stable original rock.
Further, the reinforced concrete anchoring hole plug is provided with a shallow reinforcing anchor rod at the section expanding end.
Further, the reinforced concrete anchoring hole plug is provided with divergent consolidation grouting holes in the loose area around the hole.
Furthermore, the reinforced concrete anchor hole plug utilizes sprayed concrete to perform initial support of the tunnel.
Furthermore, the reinforced concrete anchoring hole plug is provided with a reinforcing steel bar stress meter at the axial stress reinforcing steel bar.
Furthermore, the reinforced concrete anchoring hole plug is provided with a concrete strain gauge in the cast-in-place concrete structure.
The utility model has the beneficial effects that:
(1) The shear supporting structure of the rock slope prestress anchoring hole plug can be used for simultaneously carrying out active supporting and passive supporting by combining the advantages of the traditional anchoring hole plug and the prestress anchor cable.
(2) According to the rock slope prestress anchoring hole plug shear supporting structure, the anchoring hole plug filled with reinforced concrete is provided with the water discharge hole and the water discharge pipe, so that water seepage of a fault breaking belt (sliding crack surface) can be discharged out of the slope body, and the internal water pressure of the slope body is reduced.
(3) According to the rock slope prestress anchoring hole plug shear supporting structure, steel bars in the hole plug are designed differently and pertinently according to geological conditions of a slope body, so that insufficient structural strength or waste is avoided.
(4) According to the rock slope prestress anchoring hole plug shear supporting structure, the reinforcing steel bar stress gauge, the concrete strain gauge and the anchor cable stress gauge are collected, the slope displacement settlement observation data are combined, the stress strain change of the anchoring hole structure is comprehensively analyzed and monitored, and the judgment accuracy of engineering technicians on whether an anchoring hole is stable is improved.
Drawings
FIG. 1 is a schematic diagram of a shear supporting structure of a prestressed anchorage hole plug of a rock slope;
FIG. 2 is a cross-sectional view of a shear supporting structure of a prestressed anchorage hole plug of a rock slope;
FIG. 3 is a flow chart of the implementation of the rock slope prestress anchoring hole plug shear supporting structure;
wherein: 1. pre-stress anchor cables; 2. raw rock; 3. enlarging the end head; 4. anchoring the hole plug; 5. axially stressed steel bars; 5.1, a steel arch; 5.2, screw thread reinforcing steel bars; 6. annular stirrups; 7. a steel bar stress meter; 8. fault fracture zone (slip fracture face); 9. a water discharge hole; 10. solidifying the grouting holes; 11. reinforced concrete anchor piers; 12. an anchor cable stress gauge; 13. sealing the anchor by concrete; 14. a drain pipe; 15. a bolt; 16. a concrete strain gauge; 17. and (5) spraying concrete.
Detailed Description
The present utility model will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model.
Examples:
rock slope prestressing force anchor hole stopper shear supporting construction includes: prestressed anchor cables, cast-in-place concrete, consolidation grouting holes, anchor rods and the like; a composite shear-resistant active supporting structure is formed by a prestressed anchor cable 1 and a reinforced concrete anchoring hole plug 4, the hole axis direction is parallel to the sliding direction of a potential sliding body, the axis is approximately orthogonal to the sliding surface, and the reinforced concrete anchoring hole plug 4 is embedded in a stable original rock 2 after penetrating through the potential sliding surface. The anchoring hole plug 4 comprises a straight wall arched tunnel with a horizontal arrangement and an axis approximately vertical to the sliding fracture surface, a tunnel primary support (shotcrete) 17, an axial stressed main rib (comprising a thread rib and a steel arch) 5 and an annular stirrup 6 which are arranged in the tunnel, backfilled concrete in the tunnel, a concreting grouting hole 10 in a loose area around the tunnel, a deep anchoring hole plug expansion end 3, a shallow reinforcing anchor rod 15, a water discharge hole 9 at a fault fracture zone (sliding fracture surface) 8, a drain pipe 14 in the hole plug and a concrete strain gauge 16; the anchoring section of the prestressed anchor cable 1 is positioned in the deep stable original rock 2 of the side slope body, the embedding length is not less than 2 times of hole width, and a reinforcing steel bar stress meter 7 is arranged at the stressed reinforcing steel bar; the outer anchor head is anchored to the reinforced concrete anchor pier 11, and an anchor rope stress meter 12 is arranged at the anchor head.
The reinforced concrete anchoring hole plugs 4 are arranged horizontally or inclined inwards, the hole axis direction is parallel to the sliding direction of the potential sliding body, the axis is approximately orthogonal to the sliding surface, vertical water draining holes are formed in the junction section of the reinforced concrete anchoring hole plugs and the fault breaking belt (sliding crack surface) 8, and finally the water draining holes are led into the internal drain pipe 14 and are discharged out of the hole plugs.
The reinforced concrete anchoring hole plug 4 is provided with a section enlarging end 3 in the deep stable original rock 2 so as to improve the reinforcing effect of the prestressed anchor cable.
The reinforced concrete anchoring hole plug 4 is provided with a shallow reinforced anchor rod 15 at the section expanding end 3 so as to improve the friction force between the expanding end and the original rock.
The reinforced concrete anchoring hole plugs 4 are provided with divergent consolidation grouting holes (10) in the loose areas around the holes so as to consolidate the rock mass of the holes Zhou Songsan.
The reinforced concrete anchoring hole plug 4 utilizes the sprayed concrete 17 to perform initial support of the tunnel so as to improve the stability of surrounding rock bodies.
The reinforced concrete anchoring hole plug 4 is provided with a reinforced bar stress meter 7 at an axial stress main rib (comprising a thread rib and a steel arch) 5 so as to monitor the reinforced bar stress in the concrete, provide a reference for slope stability analysis, and carry out reinforcement design according to the stress characteristics of the anchoring hole plug 4 and meet the related regulations of the current national standard 'concrete structure design Specification' GB 50010.
The reinforced concrete anchoring hole plug 4 is provided with a concrete strain gauge 16 in the cast-in-place concrete structure so as to monitor the deformation condition of the concrete and provide a reference for slope stability analysis.
The number of the prestressed anchor cables 1 arranged in the cross section of the anchoring hole plug 4 is determined after calculation of and in current national standards of building slope engineering technical Specification GB50330-2013, geotechnical anchor rod and shotcrete support engineering Specification GB50086-2015 and geotechnical anchor rod (rope) technical Specification CECS 22-2005.
The prestressed anchor cable 1 is characterized in that an anchor cable stress meter 12 is arranged at the outer anchor head to monitor the anchoring force of the prestressed anchor cable, and the deformation condition of the fault fracture zone (slip crack surface) at the deep part of the side slope is analyzed and judged by observing the variation degree of the anchoring force.
The utility model is realized by the following modes:
step1: design phase
Through investigation means, the stratum lithology, geological structure, hydrogeology, sliding surface position and scale are ascertained; providing geomechanical parameter suggested values; according to engineering analogy, primarily determining the length of an anchoring hole plug, the section size of the hole plug, drilling and blasting design, drainage measure layout, grouting measure layout and in-hole supporting measures; establishing a sliding body calculation model, calculating stability, calculating landslide thrust and anti-slip force provided by an anchoring hole plug, designing reinforcement of an anchoring hole plug structure, and designing a pre-stressed anchor cable; and (5) continuously optimizing the parameters of the anchoring hole plug and finally determining the design parameters.
Step2: construction stage
In a rock slope with a deep fault fracture zone (slip fracture surface) 8, carrying out tunnel construction operation according to the axis, the section size, the drilling and blasting design and the length of an anchoring hole plug 4 determined by design parameters, setting a net-hanging sprayed concrete 17 as an initial support in the process of excavating the hole plug, and setting an enlarged end head 3 at the root of the hole plug; drilling an anchor rope hole from the root of the hole plug to the mountain body, wherein the axial direction of the anchor rope hole is parallel to the axis of the hole plug, and the mountain body anchoring section of the prestressed anchor rope 1 is embedded in the stable original rock 2; arranging an axial stressed main steel bar 5 and an annular stirrup 6 around the hole, wherein the main steel bar comprises a threaded steel bar 5.2 and a steel arch 5.1, installing a steel bar stress meter 7 and constructing a second layer of hanging net sprayed concrete 17; constructing a vertical shallow reinforced anchor rod 15 at the position of the hole plug expansion end head 3; installing an in-hole drain pipe 14, constructing a vertical water drain hole 9 at the junction of the in-hole drain pipe 14 and the fracture zone (slip crack surface) 8, and finally leading the water drain hole 9 into the inner drain pipe 14 to drain out of the hole plug; constructing divergent type consolidation grouting 10 in a loosening area of a hole Zhou Zhongshang part; backfilling concrete and installing a concrete strain gauge 16; and pouring a concrete anchor pier 13, grouting in an anchor cable hole after the anchor pier is disassembled, backfilling concrete in a hole plug and tensioning the anchor cable after the anchor pier concrete reaches the strength meeting the tensioning requirement, and simultaneously installing an anchor cable stress meter 12. After the anchor cable applies prestress, the hole plug is axially pressed, the anchoring hole plug, the anchor cable and the stable rock mass are stressed cooperatively, the anti-skid function is exerted jointly, and finally the purpose of active support is achieved.
Step3: monitoring analysis stage
And according to the design and specification requirements, the data of the steel bar stress gauge 7, the concrete strain gauge 16 and the anchor cable stress gauge 12 are periodically read, analyzed and tidied to form a stress monitoring report.
The above description is only illustrative of the preferred embodiments of the present utility model and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in the present utility model is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present utility model (but not limited to) having similar functions are replaced with each other.
Claims (9)
1. A rock slope prestress anchoring hole plug shear supporting structure comprises: the prestressed anchor cable (1), reinforced concrete anchor hole plugs (4), reinforced concrete anchor piers (11) and anchor cable stress meters (12) are characterized in that: the prestressed anchor cable (1) and the reinforced concrete anchoring hole plug (4) form a composite shear-resistant active supporting structure together, the reinforced concrete anchoring hole plug (4) penetrates through a sliding fracture surface and is embedded in the stable raw rock (2), the anchoring section of the prestressed anchor cable (1) is positioned in the deep stable raw rock (2) of the side slope body, and the embedded length is not less than 2 times of hole width; the outer anchor head is anchored on the reinforced concrete anchor pier (11), and an anchor rope stress meter (12) is arranged at the anchor head.
2. The rock slope prestress anchoring hole plug shear supporting structure according to claim 1, wherein: the anchoring hole plug (4) comprises a straight wall arched tunnel, an injected concrete (17), an axial stress steel bar (5) and an annular stirrup (6) which are horizontally arranged and the axis of which is vertical to the sliding crack surface, backfilled concrete in the tunnel, a concreting grouting hole (10) in a loose area around the tunnel, a deep anchoring hole plug expansion end (3), a shallow layer reinforcing anchor rod (15), a water draining hole (9) at a fault fracture zone (8), a drain pipe (14) in the hole plug and a concrete strain gauge (16); the axial stress steel bar (5) comprises a screw thread steel bar (5.2) and a steel arch (5.1).
3. The rock slope prestress anchoring hole plug shear supporting structure according to claim 2, wherein: the reinforced concrete anchoring hole plugs (4) are arranged horizontally or inclined inwards, the hole axis direction is parallel to the sliding direction of the sliding body, the axis is orthogonal to the sliding surface, vertical water draining holes are formed in the intersection sections of the reinforced concrete anchoring hole plugs and the fault breaking belt (8), and the water draining holes are connected with an internal drain pipe (14) and are discharged out of the hole plugs.
4. The rock slope prestress anchoring hole plug shear supporting structure according to claim 2, wherein: the reinforced concrete anchoring hole plug (4) is provided with a section enlarging end (3) in the deep stable original rock (2).
5. The rock slope prestress anchoring hole plug shear supporting structure according to claim 4, wherein: the reinforced concrete anchoring hole plug (4) is provided with a shallow reinforcing anchor rod (15) at the section expanding end (3).
6. The rock slope prestress anchoring hole plug shear supporting structure according to claim 2, wherein: the reinforced concrete anchoring hole plug (4) is provided with divergent consolidation grouting holes (10) in a loose area around the hole.
7. The rock slope prestress anchoring hole plug shear supporting structure according to claim 2, wherein: the reinforced concrete anchoring hole plug (4) utilizes sprayed concrete (17) to perform initial support of the tunnel.
8. The rock slope prestress anchoring hole plug shear supporting structure according to claim 2, wherein: the reinforced concrete anchoring hole plug (4) is provided with a reinforcing steel bar stress meter (7) at the axial stress reinforcing steel bar (5).
9. The rock slope prestress anchoring hole plug shear supporting structure according to claim 2, wherein: the reinforced concrete anchoring hole plug (4) is provided with a concrete strain gauge (16) in the cast-in-place concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223417465.6U CN219808389U (en) | 2022-12-20 | 2022-12-20 | Prestressed anchorage of rock slope anti-shearing supporting structure for hole plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223417465.6U CN219808389U (en) | 2022-12-20 | 2022-12-20 | Prestressed anchorage of rock slope anti-shearing supporting structure for hole plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219808389U true CN219808389U (en) | 2023-10-10 |
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ID=88216354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223417465.6U Active CN219808389U (en) | 2022-12-20 | 2022-12-20 | Prestressed anchorage of rock slope anti-shearing supporting structure for hole plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219808389U (en) |
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2022
- 2022-12-20 CN CN202223417465.6U patent/CN219808389U/en active Active
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