CN116516992A - Prefabricated seepage-proofing anchoring structure of steep rock slope and construction method - Google Patents
Prefabricated seepage-proofing anchoring structure of steep rock slope and construction method Download PDFInfo
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- CN116516992A CN116516992A CN202310422890.4A CN202310422890A CN116516992A CN 116516992 A CN116516992 A CN 116516992A CN 202310422890 A CN202310422890 A CN 202310422890A CN 116516992 A CN116516992 A CN 116516992A
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- Prior art keywords
- anchoring
- prefabricated
- anchor
- side slope
- seepage
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- 238000004873 anchoring Methods 0.000 title claims abstract description 94
- 239000011435 rock Substances 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 title abstract description 11
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 28
- 239000011378 shotcrete Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 8
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 25
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a prefabricated seepage-proofing anchoring structure of a steep rock slope and a construction method, comprising the following steps: an anchor and a prefabricated member; the anchoring pieces are fixed at preset positions of the side slope, the prefabricated part is fixed on at least one anchoring piece, and an anchoring groove is formed on the fixed prefabricated part; a sprayed concrete layer is formed on the side slope, a reinforcing mesh is arranged in the sprayed concrete layer, and a plurality of anchoring pieces are connected with the reinforcing mesh; and an anti-seepage system is paved on the sprayed concrete layer and the prefabricated part, the anti-seepage system is anchored by the anchoring concrete filled in the anchoring ditch, and the upper space of the anchoring ditch is also used as a drainage ditch. The invention fixes the prefabricated part on the side slope through the anchoring piece, and anchors the seepage-proofing system on the prefabricated part; the anti-seepage system not only can strengthen the soil body of the side slope, but also can realize the anchoring of the anti-seepage system on the steep side slope.
Description
Technical Field
The invention relates to the technical field of landfill seepage prevention, in particular to a prefabricated seepage prevention anchoring structure of a steep rock slope and a construction method, which are suitable for a landfill seepage prevention structure with steep slope and high height.
Background
With the enhancement of national environmental awareness, the function of the landfill impervious layer structure is to completely isolate the landfill object from surrounding stratum through the impervious film, so as to form an independent and closed environment of the landfill, further prevent the infiltration of landfill leachate into the ground and pollute the groundwater around the landfill. The stable and firm anchoring of the refuse landfill impermeable layer structure is the guarantee of realizing the functions, the anchoring of the impermeable membrane or impermeable layer is an essential engineering measure for the construction of a household refuse landfill impermeable system, the anchoring of the impermeable membrane or impermeable layer on a soil slope or a rock slope with a relatively slow gradient can be realized by arranging an anchoring platform on the slope, and the engineering measure of excavating an anchoring groove on the anchoring platform and excavating the anchoring groove on the slope roof.
In rock slopes, particularly steep slopes, the anchoring platform is very difficult to set, the anchoring ditch is difficult to excavate, even the situation that excavation cannot be performed occurs, and therefore the impermeable membrane anchor of the steep slope and the high slope becomes a difficulty in engineering technology of an impermeable system of a household garbage landfill.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a prefabricated anti-seepage anchoring structure of a steep rock slope and a construction method, wherein a prefabricated component is fixed on the slope through an anchoring piece, and an anti-seepage system is anchored on the prefabricated component; the anti-seepage system not only can strengthen the rock-soil mass of the side slope, but also can realize the anchoring of the anti-seepage system on the steep side slope.
The invention discloses a prefabricated anti-seepage anchoring structure of a steep rock slope, which comprises the following components: an anchor and a prefabricated member;
the anchoring pieces are fixed at preset positions of the side slope, the prefabricated parts are fixed on at least one anchoring piece, and anchoring grooves are formed in the fixed prefabricated parts;
a sprayed concrete layer is formed on the side slope, a reinforcing mesh is arranged in the sprayed concrete layer, and a plurality of anchoring pieces are connected with the reinforcing mesh; and an anti-seepage system is paved on the sprayed concrete layer and the prefabricated part, and is anchored by anchoring concrete filled in the anchoring groove.
As a further development of the invention, the anchor comprises a shank and an anchor tube.
As a further improvement of the invention, the upper part and the lower part of the side slope are provided with anchor rods, and the middle part is provided with anchor pipes;
the anchor rod at the upper part is welded and fixed with the reinforcing mesh and the prefabricated part;
the anchor pipe in the middle part is welded and fixed with the reinforcing mesh and the prefabricated part;
the anchor rod at the lower part is welded and fixed with the reinforcing mesh and is welded and fixed with the prefabricated part through the inclined tube.
As a further improvement of the invention, the prefabricated part is a trapezoid part, the fixed prefabricated part is opened upwards, and the cavity of the prefabricated part is used as the anchoring groove.
As a further improvement of the invention, one side of the trapezoid member is tightly attached to the sprayed concrete layer and is welded and fixed with the anchor rod at the upper part, the other side of the trapezoid member is welded and fixed with the extended anchor pipe, and the top of the side is connected with the anchor rod at the lower part through the inclined pipe.
As a further improvement of the present invention, the anchoring concrete occupies not less than half of the volume of the anchoring ditch, and the remaining portion of the anchoring ditch serves as a drainage ditch.
As a further improvement of the invention, the anti-seepage system comprises an upper geotechnical composite drainage network, an HDPE geomembrane and a lower geotechnical composite drainage network which are arranged in sequence from top to bottom.
The invention also discloses a construction method of the prefabricated seepage-proofing anchoring structure of the steep rock slope, which comprises the following steps:
slope dressing;
driving a required anchor rod and anchor pipe at a preset position of a side slope, and fixing the anchor rod and the anchor pipe;
spraying a first layer of concrete on the side slope, binding a reinforcing mesh after drying, and connecting the reinforcing mesh with the anchor rod and the anchor pipe; after binding is completed, spraying a second layer of concrete to form a sprayed concrete layer with a reinforcing mesh arranged inside;
fixing prefabricated components at the tail ends of the anchor rods and the anchor pipes;
and paving an anti-seepage system on the sprayed concrete layer and the prefabricated part, and filling anchoring concrete in the anchoring groove of the prefabricated part to anchor the anti-seepage system.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, an anchor spraying slope system is fully utilized, prefabricated components are installed based on anchor rods, anchor pipes and other anchor parts, and an anti-seepage system is anchored through the prefabricated components; the invention fully utilizes the slope protection system, does not need to excavate greatly to form an anchoring ditch, has small occupied area, small labor intensity, high mechanization degree and short construction period, provides large anchoring force, and can effectively solve the problem that the impermeable structure of the landfill under the condition of steep slope is difficult to anchor.
Drawings
FIG. 1 is a schematic structural view of a prefabricated impermeable anchor structure for a steep rocky side slope according to an embodiment of the invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is an enlarged view at B in fig. 1.
In the figure:
1. rock slope; 2. a bolt; 3. an anchor tube; 4. a reinforcing mesh; 5. spraying a concrete layer; 6. a chute; 7. a prefabricated member; 8. anchoring the concrete; 9. a lower geotechnical composite drainage network; 10. HDPE geomembranes; 11. an upper geotechnical composite drainage net.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a prefabricated seepage-proofing anchoring structure of a steep rock slope and a construction method, comprising the following steps: an anchor and a prefabricated member; the anchoring pieces are fixed at preset positions of the side slope, the prefabricated part is fixed on at least one anchoring piece, and an anchoring groove is formed on the fixed prefabricated part; a sprayed concrete layer is formed on the side slope, a reinforcing mesh is arranged in the sprayed concrete layer, and a plurality of anchoring pieces are connected with the reinforcing mesh; and an anti-seepage system is paved on the sprayed concrete layer and the prefabricated part, and the anti-seepage system is anchored by the anchoring concrete filled in the anchoring groove. The invention fixes the prefabricated part on the side slope through the anchoring piece, and anchors the seepage-proofing system on the prefabricated part; the anti-seepage system not only can strengthen the rock-soil mass of the side slope, but also can realize the anchoring of the anti-seepage system on the steep side slope.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in figures 1-3, the invention provides a prefabricated anchoring structure of a steep rock slope, which is particularly suitable for anchoring a seepage-proofing structure of a landfill with steep slope and high height; comprising the following steps: the concrete-filled pile comprises an anchor rod 2, an anchor pipe 3, a reinforcing mesh 4, an shotcrete layer 5, an inclined pipe 6, a prefabricated part 7, an anchor concrete 8 and an anti-seepage system; wherein, the liquid crystal display device comprises a liquid crystal display device,
the anchor rod 2 and the anchor pipe 3 can be original slope anchoring structures, the anchor rod 2 and the anchor pipe 3 are fixed at the preset position of the slope 1, and the length, the diameter and the fixed position of the anchor rod and the anchor pipe are calculated and determined according to the type, the height and the grade of the slope; as shown in figure 1, the invention is provided with anchor rods 2 at the upper part and the lower part of a side slope 1, and anchor pipes 3 at the middle part.
After an anchor rod 2 and an anchor pipe 3 are fixed on a side slope 1, an injection concrete layer 5 is formed on the side slope, a reinforcing mesh 4 is arranged in the injection concrete layer 5, and the anchor rod 2 and the anchor pipe 3 are connected with the reinforcing mesh 4, so that the side slope 1, the anchor rod 2, the anchor pipe 3, the reinforcing mesh 4 and the injection concrete layer 5 are integrally fixed, and the anchoring force on the side slope 1 is enhanced.
The existing side slope seepage-proofing structure is characterized in that a seepage-proofing system is directly paved on an injection concrete layer 5, and comprises a lower geotechnical composite drainage network 9, an HDPE geomembrane 10 and an upper geotechnical composite drainage network 11 which are sequentially arranged; in order to strengthen the anchoring of the seepage-proofing system on a steep slope, the invention prolongs the anchor rods 2 and the anchor pipes 3, fixes the prefabricated part 7 on at least one anchoring piece by utilizing the slope anchoring system, and forms an anchoring groove on the fixed prefabricated part 7; wherein, the prefabricated part 7 can be a trapezoid part as shown in fig. 1, the fixed prefabricated part 7 is opened upwards, and the cavity of the prefabricated part is used as an anchoring groove. According to the invention, the prefabricated part 7 is fixed on the side slope anchoring system, so that the fixing mode of excavating an anchoring ditch on the side slope site is omitted; based on the fixed prefabricated part 7, the invention can fill the anchoring concrete 8 in the anchoring groove so as to realize the anchoring of the seepage-proofing system.
Further, the concrete fixing manner of the prefabricated part 7 of the present invention is:
the upper anchor rod 2 is welded and fixed with the reinforcing mesh 3 and the prefabricated part 7, the anchor pipe 3 in the middle is welded and fixed with the reinforcing mesh 4 and the prefabricated part 7, the lower anchor rod 2 is welded and fixed with the reinforcing mesh 4 and is welded and fixed with the prefabricated part 7 through the inclined pipe 6, as shown in figures 1-3; one side of the trapezoid prefabricated part 7 is tightly attached to the sprayed concrete layer 5 and is welded and fixed with the anchor rod 2 at the upper part, the other side of the trapezoid prefabricated part 7 is welded and fixed with the extended anchor pipe 3, and the top of the side is connected to the anchor rod 2 at the lower part in an inclined way through the inclined pipe 6.
Further, the anchoring concrete 8 of the present invention occupies not less than half of the volume of the anchoring ditch, and the remaining portion of the anchoring ditch serves as a drainage ditch, so that the trapezoidal prefabricated member 7 doubles as drainage.
Furthermore, the prefabricated part of the invention can be disassembled after being used, and can be backfilled and transformed into a blind ditch.
The invention provides a construction method of a prefabricated seepage-proofing anchoring structure of a steep rock slope, which comprises the following steps: slope trimming, drilling of an anchor pipe and an anchor rod, installing the anchor pipe and the anchor rod, welding the extension anchor rod and the prefabricated trapezoid component, supporting firmly by using the inclined pipe, and anchoring the seepage-proofing structure through the prefabricated trapezoid component.
The method specifically comprises the following steps:
step 1, according to the condition of the seepage-proofing structure engineering, the slope is preferably trimmed and cleaned by adopting a small machine in combination with manpower so as to ensure that the slope is smooth and meets the design rule;
step 2, drilling the anchor rod hole, wherein the anchor rod hole needs to enter a rock stratum for a certain distance, so that the anchoring requirement is met; the length reserved by the anchor pipe needs to meet the anchoring requirement; before the anchor rod is installed, cleaning up sundries such as stone powder, accumulated water and the like remained in the hole; after the anchor rod is inserted, the hole is fixed and closed by an iron wedge at the hole. Installing an exhaust hole when the anchor rod is inserted, wherein the distance between the exhaust hole and the hole bottom is 50-100 mm, and grouting can be stopped when the exhaust hole is grouted; the outer end of the anchor tube is used for welding with the prefabricated trapezoid component.
Step 3, spraying the first-layer concrete slope protection, wherein the spraying is performed from bottom to top, the vertical distance between a spray head and a sprayed surface is preferably 0.6-1.0m, the spraying thickness is not less than 40mm, after the sprayed concrete is finally set for 2 hours, water spraying maintenance is performed, and the maintenance time is preferably 3-7 days according to the air temperature; after the first layer concrete spraying is completed, paving and binding a surface layer reinforcing steel bar net, wherein the reinforcing steel bar net adopts phi 6@200, welding short sections of reinforcing steel bars on two sides of the end parts of the anchor rod reinforcing steel bars along the length direction of the anchor rod reinforcing steel bars, and mutually welding the short sections of reinforcing steel bars with the through length reinforcing steel bars connected with the end parts of the adjacent anchor rod reinforcing steel bars in the surface layer; then, spraying the second-layer concrete;
step 4, welding the tail ends of the anchor rod and the anchor pipe with the prefabricated trapezoid component, and ensuring firm welding;
and 5, anchoring the seepage-proofing system on the trapezoid prefabricated member, wherein anchoring concrete can be adopted for anchoring, the trapezoid member and the seepage-proofing anchor are required to be firm, the volume of the anchoring concrete is about half of the cavity of the prefabricated trapezoid member, and the rest part is also used as temporary drainage.
The invention has the advantages that:
according to the invention, an anchor spraying slope system is fully utilized, prefabricated components are installed based on anchor rods, anchor pipes and other anchor parts, and an anti-seepage system is anchored through the prefabricated components; the invention utilizes the slope protection system of the side slope, does not need to excavate greatly to form an anchoring ditch, has small occupied area, small labor intensity, high mechanization degree and short construction period, provides large anchoring force, and can effectively solve the problem that the seepage-proofing structure of the landfill under the condition of high and steep side slope is difficult to anchor.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A prefabricated impervious anchoring structure of a steep rock slope, comprising: an anchor and a prefabricated member;
the anchoring pieces are fixed at preset positions of the side slope, the prefabricated parts are fixed on at least one anchoring piece, and anchoring grooves are formed in the fixed prefabricated parts;
a sprayed concrete layer is formed on the side slope, a reinforcing mesh is arranged in the sprayed concrete layer, and a plurality of anchoring pieces are connected with the reinforcing mesh; and an anti-seepage system is paved on the sprayed concrete layer and the prefabricated part, and is anchored by anchoring concrete filled in the anchoring groove.
2. A prefabricated impermeable anchor structure for a steep rocky side slope according to claim 1, wherein said anchor comprises an anchor rod and an anchor tube.
3. The prefabricated impervious anchoring structure of a steep rocky side slope according to claim 2, wherein the upper and lower parts of the side slope are provided with anchor rods and the middle part is provided with anchor pipes;
the anchor rod at the upper part is welded and fixed with the reinforcing mesh and the prefabricated part;
the anchor pipe in the middle part is welded and fixed with the reinforcing mesh and the prefabricated part;
the anchor rod at the lower part is welded and fixed with the reinforcing mesh and is welded and fixed with the prefabricated part through the inclined tube.
4. A prefabricated anti-seepage anchoring structure for a steep rocky side slope according to claim 3, wherein the prefabricated parts are trapezoid parts, the prefabricated parts after fixing are opened upwards, and the hollow cavities of the prefabricated parts serve as the anchoring grooves.
5. A prefabricated impermeable anchor structure for a steep rocky side slope according to claim 4, wherein one side of said trapezoid member is tightly attached to said sprayed concrete layer and is welded to an upper anchor rod, the other side of said trapezoid member is welded to an extended anchor tube and the top of said side is connected to a lower anchor rod by said inclined tube.
6. A prefabricated impermeable anchor structure for a steep rocky side slope according to claim 1, wherein the anchoring concrete occupies not less than half of the volume of the anchoring channel, and the remainder of the anchoring channel serves as a drainage channel.
7. The prefabricated anti-seepage anchoring structure of the steep rocky side slope according to claim 1, wherein the anti-seepage system comprises an upper geotechnical composite drainage network, an HDPE geomembrane and a lower geotechnical composite drainage network which are arranged in sequence from top to bottom.
8. A method of constructing a prefabricated impermeable anchor structure for a steep rocky side slope according to any one of claims 1 to 7, comprising:
slope dressing;
driving a required anchor rod and anchor pipe at a preset position of a side slope, and fixing the anchor rod and the anchor pipe;
spraying a first layer of concrete on the side slope, binding a reinforcing mesh after drying, and connecting the reinforcing mesh with the anchor rod and the anchor pipe; after binding is completed, spraying a second layer of concrete to form a sprayed concrete layer with a reinforcing mesh arranged inside;
fixing prefabricated components at the tail ends of the anchor rods and the anchor pipes;
and paving an anti-seepage system on the sprayed concrete layer and the prefabricated part, and filling anchoring concrete in the anchoring groove of the prefabricated part to anchor the anti-seepage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310422890.4A CN116516992A (en) | 2023-04-19 | 2023-04-19 | Prefabricated seepage-proofing anchoring structure of steep rock slope and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310422890.4A CN116516992A (en) | 2023-04-19 | 2023-04-19 | Prefabricated seepage-proofing anchoring structure of steep rock slope and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116516992A true CN116516992A (en) | 2023-08-01 |
Family
ID=87395245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310422890.4A Pending CN116516992A (en) | 2023-04-19 | 2023-04-19 | Prefabricated seepage-proofing anchoring structure of steep rock slope and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116516992A (en) |
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2023
- 2023-04-19 CN CN202310422890.4A patent/CN116516992A/en active Pending
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