CN114657984A - Segmental grouting anchoring method for joint development high and steep rocky slope - Google Patents
Segmental grouting anchoring method for joint development high and steep rocky slope Download PDFInfo
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- CN114657984A CN114657984A CN202210431331.5A CN202210431331A CN114657984A CN 114657984 A CN114657984 A CN 114657984A CN 202210431331 A CN202210431331 A CN 202210431331A CN 114657984 A CN114657984 A CN 114657984A
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- Prior art keywords
- grouting
- slope
- anchor rod
- water stop
- segmental
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- 238000004873 anchoring Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 239000011435 rock Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of geotechnical engineering, in particular to a segmental grouting anchoring method for a joint-development high and steep rocky slope; the invention provides a segmental grouting anchoring method for a joint-development high-steep rock slope, which realizes strong combination of grouting and anchoring, wherein a steel expansion shell can stabilize a shallow rock-soil body and a grouting pipe, and an annular PN water-swelling water-stop ring is adopted, so that the effective blocking effect lays a foundation for improving grouting pressure, the grouting quality is ensured, and the reinforcement and reconstruction effect is greatly enhanced; the structure is simple to install and operate, and the cost is low.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a segmental grouting anchoring method for a joint-development high and steep rocky slope.
Background
In recent years, along with the continuous and stable development of economy in China, cities are rapidly expanding and expanding, and more high-angle fissure development rock slopes appear in the field of buildings. 70% of the areas in China are mountainous areas, the geological conditions are complex, landslide geological disasters in engineering construction often cause very disastrous engineering loss and casualties, and particularly the landslide disasters are frequent for high-angle fracture development rock slopes.
Aiming at the disasters, the disasters can be effectively eliminated through grouting of the anchor rods and the anchor cables. Grouting is an important process for anchor rod and anchor cable construction. The grouting has the functions of forming an anchoring section to anchor the pull rod in the rock-soil layer, preventing the corrosion of the steel pull rod and filling the cracks of the rock stratum and the pores of the soil layer.
Traditional slip casting anchor mainly divide into five steps, and the first step is crept into: drilling and cleaning holes by using a common rock drill; secondly, inserting the anchor rod: inserting the hollow grouting anchor rod with the installed anchor head into the hole, and immediately hanging the anchor rod by the barb on the anchor head; thirdly, installing accessories such as a grout stop plug, a backing plate and a nut to form a simple rack; the fourth step is connecting a grouting machine: connecting the tail end of the anchor rod with the selected grouting machine through a quick grouting joint; grouting in the fifth step: starting the machine for grouting. However, the crack growth of the joint of the high and steep rocky slope can cause the defects of poor grouting anchoring effect, poor crack filling effect and the like, and the risk of landslide can be increased.
Therefore, how to ensure the grouting and anchoring effect on the high and steep slope during the birth control is a problem which needs to be solved urgently at present.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the problems in the background art, and provides a segmental grouting and anchoring method for a joint-development high-steep rock slope, so as to overcome the problems of the existing anchoring and grouting and effectively reinforce the occurrence of geological disasters such as the slope, the landslide and the like.
(II) technical scheme
A segmental grouting anchoring method for a joint-development high-steep rock slope comprises the following steps:
selecting a proper drill bit according to geological conditions, carrying out progressive drilling on the side slope, wherein the drilling direction is vertical to the formation attitude, and repeatedly checking and cleaning the drilled hole by using a drill rod after the drilling is finished;
step two, firstly installing a prestressed steel expansion shell on the anchor rod, and installing two water stop rings, namely a first water stop ring and a second water stop ring, at the sectional grouting position and the slope position;
inserting a second water stop ring into the water injection pipe and the outer grouting pipe;
manually and forcibly pulling outwards, anticlockwise rotating the anchor rod, fully opening the steel expansion shell to be tightly bitten by the rock wall, and then screwing the bolt of the anchor rod by using a wrench to fully contact the steel base plate with the slope;
injecting water into the water injection pipe to expand the two water stop rings;
step six, grouting can be simultaneously carried out in the inner diameter of the anchor rod and the outer grouting pipe;
and step seven, after the steel base plate and the slope are overflowed, stopping grouting of the inner diameter of the anchor rod and the outer grouting pipe respectively, and sealing the slope.
Preferably, the inner section of the anchor rod is provided with a plurality of grouting holes to form a I-level grouting pipe; the inner section of the outer grouting pipe is also provided with a plurality of grouting holes to form a II-level grouting pipe.
Preferably, the middle section of the anchor rod is provided with threads and is connected with the steel expansion shell.
Preferably, the outer end of the anchor rod is provided with a nut, and the nut presses the slope surface of the side slope through a steel backing plate.
Preferably, the water injection pipe is provided with drain holes corresponding to the two water stop rings, and the first water stop ring and the second water stop ring are both in an annular PN shape and expand when meeting water.
Preferably, the water injection pipes are symmetrically arranged on the periphery of the anchor rod, and the outer grouting pipes are also symmetrically arranged on the periphery of the anchor rod and are bonded with the second water stop ring through industrial glue.
(III) advantageous effects
The invention provides a segmental grouting anchoring method for a joint-development high-steep rock slope, which realizes strong combination of grouting and anchoring, wherein a steel expansion shell can stabilize a shallow rock-soil body and a grouting pipe, and an annular PN water-swelling water-stop ring is adopted, so that the effective blocking effect lays a foundation for improving grouting pressure, the grouting quality is ensured, and the reinforcement and reconstruction effect is greatly enhanced; the structure is simple to install and operate and low in cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only for the present invention and protect some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the present invention;
FIG. 3 is a cross-sectional view of the steel expansion shell of the present invention;
FIG. 4 is a cross-sectional view of a second water stop ring of the present invention;
FIG. 5 is a cross-sectional view of a first water stop ring of the present invention;
FIG. 6 is a schematic view of a class I slip pipe.
In the drawings, the components represented by the respective reference numerals are listed below:
the grouting device comprises 1-I-level grouting pipes, 2-II-level grouting pipes, 3-II water stop rings, 4-I water stop rings, 5-steel expansion shells, 6-anchor rods, 7-outer grouting pipes, 8-nuts, 9-water injection pipes, 10-steel backing plates, 11-slopes and 12-shooting holes.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and "third," if any, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the attached figure 1, a segmental grouting anchoring method for a joint-development high-steep rock slope comprises the following steps: selecting a proper drill bit according to geological conditions, carrying out progressive drilling on the side slope, wherein the drilling direction is vertical to the formation attitude, and repeatedly checking and cleaning the drilled hole by using a drill rod after the drilling is finished;
step two: firstly, mounting a prestressed steel expansion shell 5 on an anchor rod 6, and mounting two water stop rings, namely a first water stop ring 4 and a second water stop ring 3, at a sectional grouting position and a slope position;
step three: then the second water stop ring 3 (the water stop ring at the position of the slope) is inserted into the water injection pipe 9 and the outer grouting pipe 7;
step four: manually pulling outwards with force, rotating the anchor rod 6 anticlockwise, fully opening the steel expansion shell 5 to be tightly bitten with the rock wall, and then screwing the bolt of the anchor rod 6 by using a wrench to enable the steel base plate 10 to be fully contacted with the slope;
step five: injecting water into the water injection pipe 9 to expand the two water stop rings;
step six: the inner diameter of the anchor rod 6 and the inner diameter of the outer grouting pipe 7 can be simultaneously grouted;
step seven: and after the steel base plate 10 and the slope surface overflow, stopping grouting of the inner diameter of the anchor rod 6 and the outer grouting pipe 7 respectively, and sealing the slope surface.
With reference to the attached figures 2-6,
wherein, the inner section of the anchor rod 6 is provided with a plurality of shooting holes 12 to form a I-level grouting pipe 1; the inner section of the outer grouting pipe 7 is also provided with a plurality of grouting holes 12 to form a II-level grouting pipe 2, so that the grouting rate is ensured.
The middle section of the anchor rod 6 is provided with threads and is connected with the steel expansion shell 5, so that the steel expansion shell 5 is connected with the anchor rod 6, the steel expansion shell 5 is expanded to increase the friction force between the steel expansion shell and the wall of a drill hole, and the anchor rod 6 has a quick anchoring function and has a blocking effect to a certain extent.
The anchor rod 6 is provided with a first water stop ring 4 corresponding to the sectional grouting position, and a second water stop ring 3 corresponding to the slope 11; and a water injection pipe 9 and an outer grouting pipe 7 penetrate through the second water stop ring 3.
The water injection pipe 9 is provided with drain holes corresponding to the two water stop rings, and the first water stop ring 4 and the second water stop ring 3 are both annular PN type and expand when meeting water;
the water injection pipe 9 is symmetrically arranged on the periphery of the anchor rod 6, and the outer grouting pipe 7 is also symmetrically arranged on the periphery of the anchor rod 6 and is bonded with the second water stop ring 3 through industrial glue.
Therefore, the water stop ring can expand rapidly when meeting water, so that grouting liquid is effectively blocked, and grouting speed is increased.
The outer end of the outer grouting pipe 7 is provided with a nut 8, and the nut 8 presses the slope surface 11 of the side slope through a steel backing plate 10, so that the stress of the end part is improved, and the reinforcing effect is enhanced.
In the above embodiment, the parameters may be as follows:
the diameter of the drill hole is 33mm, and the diameter of the drill hole is 15mm larger than that of the anchor rod;
the diameter of the anchor rod 6 is 18mm, and the aperture of the grout injection hole 12 on the anchor rod is 1 cm;
the diameters of the grouting pipes 2 are all 3mm, and the aperture of a grouting hole 12 on each grouting pipe is 1 cm;
the diameters of the two water stop rings are 30 mm;
the diameters of the water injection pipes 9 are all 3 mm;
the steel shim plate 10 has a width of 1200mm and a thickness of 9.5 mm.
Reference throughout this specification to the description of "one embodiment," "an example," "a specific example," or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, aspects, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A segmental grouting and anchoring method for a joint-development high and steep rock slope is characterized by comprising the following steps:
selecting a proper drill bit according to geological conditions, carrying out progressive drilling on the side slope, wherein the drilling direction is vertical to the formation attitude, and repeatedly checking and cleaning the drilled hole by using a drill rod after the drilling is finished;
step two, firstly installing a prestressed steel expansion shell (5) on the anchor rod (6), and installing two water stop rings, namely a first water stop ring (4) and a second water stop ring (3), at a sectional grouting position and a slope position;
thirdly, inserting the second water stop ring (3) into the water injection pipe (9) and the outer grouting pipe (7);
manually and forcibly pulling outwards, rotating the anchor rod (6) anticlockwise, fully opening the steel expansion shell to be tightly bitten with the rock wall, and then screwing the bolt of the anchor rod (6) by using a wrench to enable the steel base plate (10) to be fully contacted with the slope;
step five, injecting water into the water injection pipe (9) to expand the two water stop rings;
step six, grouting can be simultaneously carried out on the inner diameter of the anchor rod (6) and the inner part of the outer grouting pipe (7);
and seventhly, stopping grouting in the inner diameter (6) and the outer grouting pipe (7) of the anchor rod respectively after the steel base plate (10) and the slope are overflowed, and sealing the slope.
2. The segmental grouting anchoring method for the high and steep rock slope for joint development according to claim 1, characterized in that a plurality of grouting holes (12) are formed in the inner section of the anchor rod (6) to form a I-level grouting pipe (1); the inner section of the outer grouting pipe (7) is also provided with a plurality of grouting holes (12) to form a II-level grouting pipe (2).
3. The segmental grouting anchoring method for the joint-development high and steep rock slope according to claim 1, characterized in that the middle section of the anchor rod (6) is provided with threads and is connected with the steel expansion shell (5).
4. The segmental grouting anchoring method for the high and steep rock slope for joint development according to claim 1, characterized in that a nut (8) is arranged at the outer end of the anchor rod (6), and the nut (8) presses the slope surface (11) of the slope through a steel backing plate (10).
5. The segmental grouting and anchoring method for the joint-development high and steep rock slope according to claim 1, characterized in that the water injection pipe (9) is provided with drain holes corresponding to the positions of the two water stop rings, and the first water stop ring (4) and the second water stop ring (3) are both ring-shaped PN type and expand when meeting water.
6. The segmental grouting anchoring method for the joint-development high and steep rock slope according to claim 1, characterized in that the water injection pipes (9) are symmetrically arranged on the periphery of the anchor rod (6), the outer grouting pipes (7) are also symmetrically arranged on the periphery of the anchor rod (6) and are bonded with the second water stop ring (3) through industrial glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210431331.5A CN114657984A (en) | 2022-04-22 | 2022-04-22 | Segmental grouting anchoring method for joint development high and steep rocky slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210431331.5A CN114657984A (en) | 2022-04-22 | 2022-04-22 | Segmental grouting anchoring method for joint development high and steep rocky slope |
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| Publication Number | Publication Date |
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| CN114657984A true CN114657984A (en) | 2022-06-24 |
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| CN202210431331.5A Pending CN114657984A (en) | 2022-04-22 | 2022-04-22 | Segmental grouting anchoring method for joint development high and steep rocky slope |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884716A (en) * | 2006-06-05 | 2006-12-27 | 吴德兴 | Prestress anchor device |
| KR20070114961A (en) * | 2006-05-30 | 2007-12-05 | 김상수 | Pressurized grouting packer with waterproof function |
| CN101581226A (en) * | 2009-06-10 | 2009-11-18 | 重庆交通大学 | Subsection anchor rod and anchoring method |
| CN107246008A (en) * | 2017-06-30 | 2017-10-13 | 浙江大学 | A kind of side slope protection from draining anchor cable system and its construction method |
| CN206592139U (en) * | 2016-12-22 | 2017-10-27 | 山东科技大学 | A kind of external poured is segmented anchoring rod |
| CN109736863A (en) * | 2018-12-26 | 2019-05-10 | 北京中煤矿山工程有限公司 | It is a kind of for liquid Anchor Agent filling bellows only starch structure |
| CN109882223A (en) * | 2019-03-30 | 2019-06-14 | 付建辉 | The method for carrying out segmenting slip casting using grouting cable anchor |
| CN211008701U (en) * | 2019-11-27 | 2020-07-14 | 河南力行科创矿山技术开发有限公司 | Anchor rope extension slip casting anchor |
| CN112252339A (en) * | 2020-09-18 | 2021-01-22 | 中铁隧道集团一处有限公司 | Upward full-length bonding anchor cable hole subsection grout stopping structure and method |
| CN113738420A (en) * | 2021-09-07 | 2021-12-03 | 山西晋煤集团技术研究院有限责任公司 | Device and method for reinforcing difficult-to-anchor roadway bottom plate |
| CN218204451U (en) * | 2022-04-22 | 2023-01-03 | 东华理工大学 | Anchoring structure of high-angle fissure development rock slope |
-
2022
- 2022-04-22 CN CN202210431331.5A patent/CN114657984A/en active Pending
Patent Citations (11)
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| CN107246008A (en) * | 2017-06-30 | 2017-10-13 | 浙江大学 | A kind of side slope protection from draining anchor cable system and its construction method |
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