CN113481986B - Anti-floating anchor rod construction method in karst area - Google Patents
Anti-floating anchor rod construction method in karst area Download PDFInfo
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- CN113481986B CN113481986B CN202110869906.7A CN202110869906A CN113481986B CN 113481986 B CN113481986 B CN 113481986B CN 202110869906 A CN202110869906 A CN 202110869906A CN 113481986 B CN113481986 B CN 113481986B
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- built
- steel sleeve
- wall
- anchor rod
- anchor hole
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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
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- 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
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- 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
- E02D31/10—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 soil pressure or hydraulic pressure
- E02D31/12—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 soil pressure or hydraulic pressure against upward hydraulic pressure
Abstract
The application discloses an anti-floating anchor rod construction method in a karst area, which comprises the following steps: s1, drilling according to a preset depth through a drilling machine to form an anchor hole; s2, placing an internal steel sleeve with a closed bottom end in the anchor hole, enabling the internal steel sleeve and the anchor hole to be coaxially arranged, and reserving a gap between the outer wall of the internal steel sleeve and the inner wall of the anchor hole; s3, grouting cement paste between the outer wall of the internally-arranged steel sleeve and the inner wall of the anchor hole, and inflating the air bag layer to prevent the cement paste from flowing into the karst cave before grouting the cement paste; s4, manufacturing an anchor rod and inserting the anchor rod into the built-in steel sleeve to enable the anchor rod and the built-in steel sleeve to be coaxial; and S5, grouting cement slurry into the built-in steel sleeve. The grouting method has the advantages that when the anchor hole penetrates through the karst cave, cement paste is prevented from flowing into the karst cave, and the normal construction effect of the grouting process is guaranteed.
Description
Technical Field
The invention relates to the field of anti-floating anchor rod construction, in particular to a construction method of an anti-floating anchor rod in a karst area.
Background
The anti-floating anchor rod is one of the anti-floating measures for underground structure in building engineering, is used to resist the influence of the buoyancy of underground water on the building structure in underground construction, and is widely applied to geotechnical engineering.
In the related technology, a drilling machine drills holes in a foundation, the manufactured anti-floating anchor rods are inserted into the drilled holes, and then grouting is performed in the drilled holes through grouting pipes.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the karst area geology is complicated, different types and different depths of karst caves are distributed in the foundation generally, the anti-floating anchor rod needs to penetrate through the karst caves during construction in the karst area, when the anchor hole penetrates through the karst caves, cement paste is injected into the anchor hole and then enters the karst caves, so that grouting cannot be conducted, and certain improvement space exists.
Disclosure of Invention
In order to guarantee normal construction of a grouting process, the application provides an anti-floating anchor rod construction method in a karst area.
The application provides an anti-floating anchor rod construction method in a karst area, which adopts the following technical scheme:
an anti-floating anchor rod construction method in a karst area comprises the following steps:
s1, drilling according to a preset depth through a drilling machine to form an anchor hole;
s2, placing an internal steel sleeve with a closed bottom end in the anchor hole, enabling the internal steel sleeve and the anchor hole to be coaxially arranged, and reserving a gap between the outer wall of the internal steel sleeve and the inner wall of the anchor hole;
s3, grouting cement paste between the outer wall of the internally-arranged steel sleeve and the inner wall of the anchor hole, and inflating the air bag layer to prevent the cement paste from flowing into the karst cave before grouting the cement paste;
s4, manufacturing an anchor rod and inserting the anchor rod into the built-in steel sleeve to enable the anchor rod and the built-in steel sleeve to be coaxial;
and S5, grouting cement slurry into the built-in steel sleeve.
By adopting the technical scheme, after the built-in steel sleeve is placed in the anchor hole, the cement paste is prevented from flowing into the karst cave through the inflated air bag, so that a constructor can conveniently pour the cement paste between the outer wall of the built-in steel sleeve and the inner wall of the anchor hole, the connection strength between the built-in steel sleeve and the anchor hole is increased, after the anchor rod is inserted into the built-in steel sleeve, the cement paste is poured into the built-in steel sleeve, the built-in steel sleeve plays a role of a pipeline for storing the cement paste, when the anchor hole penetrates through the karst cave, the cement paste is prevented from flowing into the karst cave, and the normal construction of a grouting process is ensured.
Preferably, the gasbag layer sets firmly in the outer wall of built-in steel casing, the gasbag layer includes a plurality of mutually independent gasbag ring portion, slide on the built-in steel casing and wear to be equipped with the conveying pipeline with gasbag ring portion one-to-one, the conveying pipeline communicates the inner chamber of built-in steel casing with the inner chamber of gasbag ring portion, be provided with the driving piece that is used for driving the conveying pipeline to remove in the built-in steel casing, the one end that the conveying pipeline is close to gasbag ring portion can move under the effect of driving piece to with gasbag ring portion butt in the position butt of anchor eye inner wall.
By adopting the technical scheme, after the built-in steel sleeve is placed in the anchor hole, the air bag ring part is firstly inflated to ensure that the air bag ring part corresponding to the inner wall position of the anchor hole is abutted against the inner wall of the anchor hole, the air bag ring part corresponding to the position of the karst cave extends out of the inner wall of the anchor hole due to the loss of the limit of the inner wall of the anchor hole, the conveying pipeline is driven to move by the driving piece, when the conveying pipeline moves to the position abutted against the air bag ring part against the inner wall of the anchor hole, the built-in steel sleeve is rotated, the air bag layer is driven to move together in the rotating process of the built-in steel sleeve, one end of the conveying pipeline is abutted against the inner wall of the air bag ring part, in the rotating process of the air bag layer, the air bag ring part corresponding to the position of the anchor hole grinds the air bag ring part through the friction force between the air bag ring part and the inner wall of the anchor hole, the air bag after being ground retracts, the pipe is exposed from the pipe orifice at the same time, cement slurry is injected into the conveying pipeline, in addition, after the air bag ring part corresponding to the position of the karst cave is inflated, the space between the outer wall of the built-in steel sleeve and the inner wall of the anchor hole is separated from the karst cave, so that the cement paste is prevented from flowing into the karst cave.
Preferably, in step S2, different ends of the material conveying pipes, which are away from the airbag ring portion, are commonly communicated with a same connecting hose, and a check valve for controlling gas or liquid to flow only from the end of the material conveying pipe, which is away from the airbag ring portion, to the end close to the airbag ring portion is disposed on the material conveying pipe;
in step S2, high-pressure gas or cement slurry is supplied to the balloon ring through the connecting hose and the feed pipe.
Through adopting above-mentioned technical scheme, make gasbag ring portion be in the inflation state after carrying high-pressure gas to gasbag ring portion through coupling hose and conveying pipeline, because the gasbag ring portion that does not butt with anchor eye inner wall is in the complete inflation state and hardly recharges grout, grout inputs to between the outer wall of built-in steel casing pipe and the anchor eye inner wall through other conveying pipelines.
Preferably, the material conveying pipe is obliquely and downwards arranged at the pipe orifice at one end close to the ring part of the air bag.
Through adopting above-mentioned technical scheme, make the conveying pipeline be close to the one end of gasbag ring portion and form the pointed end, and the mouth of pipe that the slope set up is convenient for the grout to flow in the clearance between the outer wall of built-in steel casing pipe and anchor eye inner wall.
Preferably, the conveying pipeline is connected to the built-in steel sleeve in a sliding mode along the radial direction of the built-in steel sleeve, and an elastic assembly used for driving the conveying pipeline to move away from the air bag ring portion is arranged on the inner wall of the built-in steel sleeve.
Through adopting above-mentioned technical scheme, realized the conveying pipeline and built-in steel sleeve between slide and be connected, removed the effort of driving piece to the conveying pipeline through the one side removal of driving piece towards gasbag ring portion, the conveying pipeline keeps away from the removal of gasbag ring portion under elastic component's effect.
Preferably, the driving piece is arranged to be a force application rod coaxial with the built-in steel sleeve, and the force application rod sequentially drives the material conveying pipe to move towards the air bag ring part from top to bottom.
Through adopting above-mentioned technical scheme, realized the drive to the conveying pipeline, the constructor of being convenient for operates.
Preferably, the cavity of the force application rod is hollow and is open at two ends, and the anchor rod can be inserted into the cavity of the force application rod.
Through adopting above-mentioned technical scheme, to the slip casting completion back between the outer wall of built-in steel casing pipe and the anchor eye inner wall, insert the stock in the inner chamber of application of force pole back, take out the application of force pole again, the one end that the gasbag ring portion was kept away from to the conveying pipeline butt in the stock under elastic component's effect, has increased the stability of being connected between stock and the built-in steel casing pipe.
Preferably, one end of the conveying pipe, which is positioned in the built-in steel sleeve, is communicated with a conveying hose, and the conveying hose is used for conveying high-pressure gas or cement paste into the conveying pipe.
By adopting the technical scheme, the high-pressure gas or cement slurry is conveyed, and after the cement slurry in the built-in steel sleeve is poured, the conveying hose is fixed in the built-in steel sleeve under the action of the cement slurry.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the built-in steel sleeve plays a role of a pipeline for storing cement paste, when the anchor hole penetrates through the karst cave, the cement paste is prevented from flowing into the karst cave, and the normal construction of a grouting process is ensured;
2. after the built-in steel sleeve is placed in the anchor hole, cement paste is prevented from flowing into the karst cave through the inflated air bag, so that a constructor can conveniently pour the cement paste between the outer wall of the built-in steel sleeve and the inner wall of the anchor hole, and the connection strength between the built-in steel sleeve and the anchor hole is increased.
Drawings
Fig. 1 is a schematic view of the structure of the present application showing the anchor eye and the built-in steel casing.
FIG. 2 is a schematic cross-sectional view of the anchor eye, steel insert sleeve, air bag layer and delivery conduit structure shown in this application.
FIG. 3 is a schematic view showing the construction of the steel casing, the connection between the feed pipe and the steel casing, the elastic member, the feed hose, the connection hose, and the force application rod.
Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.
Fig. 5 is a schematic partial cross-sectional view of the present application showing an arcuate face.
Description of reference numerals:
1. an anchor eye; 2. a steel sleeve is arranged inside; 21. a sliding hole; 22. a cover plate; 3. an air bag layer; 31. an airbag ring portion; 4. a delivery pipe; 41. a pipe orifice; 42. a tip; 43. an arc-shaped surface; 51. a delivery hose; 52. a connecting hose; 6. an elastic component; 61. a support plate; 62. a spring; 621. a guide bar; 7. a force application rod; 8. and (4) cave filling.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses an anti-floating anchor rod construction method in a karst area.
Referring to fig. 1, a construction method of an anti-floating anchor rod in a karst area includes the following steps:
and S1, drilling by a drilling machine according to a preset depth to form the anchor hole 1, and cleaning the anchor hole 1.
S2, combining the drawings 1 and 2, placing the built-in steel sleeve 2 in the anchor hole 1, sealing the bottom end of the built-in steel sleeve 2, enabling the top end of the built-in steel sleeve 2 to be flush with the top end of the anchor hole 1, and leaving a gap between the outer wall of the built-in steel sleeve 2 and the inner wall of the anchor hole 1.
An air bag layer 3 is fixed on the outer wall of the built-in steel sleeve 2, the air bag layer 3 comprises a plurality of air bag ring portions 31 with mutually independent inner cavities and sequentially distributed along the axis direction of the built-in steel sleeve 2, and the air bag ring portions 31 are arranged along the circumferential direction of the built-in steel sleeve 2.
With reference to fig. 2 and 3, the built-in steel sleeve 2 is provided with two sliding holes 21 corresponding to the air bag ring portion 31, and the two sliding holes 21 are uniformly distributed along the circumferential direction of the built-in steel sleeve 2 at intervals. A material conveying pipe 4 is slidably arranged in the sliding hole 21 in a penetrating mode, and the material conveying pipe 4 is used for inputting high-pressure gas into the air bag ring part 31 or inputting cement paste between the outer wall of the internally-arranged steel sleeve 2 and the inner wall of the anchor hole 1. One end of the material conveying pipe 4 extends into the airbag ring part 31, and a pipe orifice 41 at one end of the material conveying pipe 4 extending into the airbag ring part 31 is obliquely and downwards arranged, so that a tip 42 is formed at one end of the material conveying pipe 4 close to the airbag ring part 31. The other end of the material conveying pipe 4 is positioned in the inner cavity of the built-in steel sleeve 2 and is arranged in a closed mode, a material conveying hose 51 is communicated with the side wall of one end, close to the material conveying pipe 4, of the material conveying pipe 4, one ends, far away from the material conveying pipe 4, of the material conveying hoses 51 are communicated with the same connecting hose 52, the bottom end of the connecting hose 52 is closed, the other end of the connecting hose 52 extends upwards out of the inner cavity of the built-in steel sleeve 2, and the material conveying hose 51 and the connecting hose 52 are used for conveying high-pressure gas or cement paste into the material conveying pipe 4.
Each material conveying pipe 4 is provided with a one-way valve, and the one-way valve is used for controlling gas or liquid to flow from one end of the material conveying pipe 4 far away from the airbag ring part 31 to one end close to the airbag ring part 31.
In order to increase the sealing performance between the material conveying pipe 4 and the sliding hole 21, a dynamic sealing ring is arranged on the inner wall of the sliding hole 21.
Referring to fig. 3 and 4, the inner wall of the steel sleeve 2 is provided with elastic components 6 corresponding to the feed delivery pipe 4 one by one, and the elastic components 6 are used for applying an acting force far away from the airbag ring part 31 to the feed delivery pipe 4. The elastic component 6 comprises a support plate 61 fixed on the outer wall of the conveying pipe 4, the two support plates 61 are symmetrically arranged on the upper side and the lower side of the conveying pipe 4, the elastic component 6 further comprises a spring 62 arranged on the support plate 61, the axial direction of the spring 62 is parallel to the axial direction of the conveying pipe 4, and two ends of the spring 62 are respectively fixed on the side wall of the support plate 61 and the inner wall of the built-in steel sleeve 2. A guide rod 621 is arranged on the inner side of the spring 62, one end of the guide rod 621 is fixed on the inner wall of the built-in steel sleeve 2, and a distance for the movement of the delivery pipe 4 is reserved between the other end of the guide rod 621 and the side wall of the support plate 61.
With reference to fig. 2, 3 and 5, the top end of the built-in steel sleeve 2 is tightly connected with a cover plate 22 by using a bolt, a force application rod 7 penetrates through the cover plate 22, the force application rod 7 and the built-in steel sleeve 2 are coaxially arranged, and the inner cavity of the force application rod 7 is hollow and has openings at two ends. One end of the conveying pipe 4, which is positioned in the built-in steel sleeve 2, is provided with an arc surface 43 which is matched with the bottom end of the force application rod 7, and when the force application rod 7 moves from top to bottom and abuts against the arc surface 43, the conveying pipe 4 moves towards the air bag ring part 31 under the action of the force application rod 7.
S3, with reference to the figures 2 and 3, grouting cement paste between the outer wall of the internally-arranged steel sleeve 2 and the inner wall of the anchor hole 1:
s31, introducing high-pressure gas into the airbag ring part 31 through the connecting hose 52, the material conveying hose 51 and the material conveying pipe 4 to enable the airbag ring part to be in an expansion state, enabling the airbag ring part 31 corresponding to the inner wall of the anchor hole 1 to be abutted against the inner wall of the anchor hole 1, enabling the airbag ring part 31 corresponding to the karst cave 8 to be in a complete expansion state due to the fact that the limitation of the inner wall of the anchor hole 1 is lost, extending out of the inner wall of the anchor hole 1, and separating the space between the outer wall of the built-in steel sleeve 2 and the inner wall of the anchor hole 1 from the karst cave 8 to prevent cement slurry from flowing into the karst cave 8;
s32, controlling the force application rod 7 to move from top to bottom, enabling the bottom end of the force application rod 7 to be sequentially abutted against the arc-shaped surface 43 on the material conveying pipe 4, applying acting force to the material conveying pipe 4, driving the material conveying pipe 4 to move, enabling the material conveying pipe 4 to move to be abutted against the position where the airbag ring part 31 is abutted against the inner wall of the anchor hole 1, and enabling the tip 42 of the material conveying pipe 4 not to be contacted with the airbag ring part 31 corresponding to the position of the karst cave 8;
s33, rotating the built-in steel sleeve 2, driving the air bag layer 3 to move together in the rotating process of the built-in steel sleeve 2, enabling one end of the material conveying pipe 4 to abut against the inner wall of the air bag ring part 31, in the rotating process of the air bag layer 3, enabling the air bag ring part 31 corresponding to the anchor hole 1 to be worn through the friction force between the air bag ring part 31 and the inner wall of the anchor hole 1, and enabling the pipe orifice 41 at one end of the material conveying pipe 4 to be exposed after the air bag is worn back;
s34, introducing cement paste into the air bag ring part 31 through the connecting hose 52, the material conveying hose 51 and the material conveying pipe 4, enabling the cement paste material conveying pipe 4 to flow into a gap between the outer wall of the built-in steel sleeve 2 and the inner wall of the anchor hole 1, and improving the connection stability between the built-in steel sleeve 2 and the inner wall of the anchor hole 1.
S4, manufacturing an anchor rod, inserting the anchor rod into the force application rod 7 to enable the anchor rod to be coaxial with the force application rod 7, taking out the force application rod 7 after insertion is completed, wherein cement paste has certain fluidity, one end, far away from the air bag ring portion 31, of the material conveying pipe 4 abuts against the anchor rod under the action of the elastic assembly 6, and the stability of connection between the anchor rod and the built-in steel sleeve 2 is improved.
And S5, grouting cement into the internally-arranged steel sleeve 2.
In the construction method of the anti-floating anchor rod, the cement paste is prevented from flowing into the karst cave 8 through the air bag layer 3, the cement paste is poured between the outer wall of the built-in steel sleeve 2 and the inner wall of the anchor hole 1, the connection strength between the built-in steel sleeve 2 and the anchor hole 1 is increased, the built-in steel sleeve 2 plays a role in storing a pipeline of the cement paste, when the anchor hole 1 penetrates through the karst cave 8, the cement paste is prevented from flowing into the karst cave 8, and the normal construction of a grouting process is guaranteed.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The construction method of the anti-floating anchor rod in the karst region is characterized by comprising the following steps:
s1, drilling by a drilling machine according to a preset depth to form an anchor hole (1);
s2, placing the internally-arranged steel sleeve (2) with the closed bottom end in the anchor hole (1), enabling the internally-arranged steel sleeve (2) and the anchor hole (1) to be coaxially arranged, and reserving a gap between the outer wall of the internally-arranged steel sleeve (2) and the inner wall of the anchor hole (1);
s3, grouting cement slurry between the outer wall of the internally-arranged steel sleeve (2) and the inner wall of the anchor hole (1), and inflating the air bag layer (3) to prevent the cement slurry from flowing into the karst cave (8) before grouting the cement slurry;
s4, manufacturing an anchor rod and inserting the anchor rod into the built-in steel sleeve (2) to enable the anchor rod and the built-in steel sleeve (2) to be coaxial;
s5, pouring cement paste into the internally-arranged steel sleeve (2);
the utility model discloses an anchor hole, including gasbag layer (3), gasbag ring portion (31), built-in steel casing pipe (2) are equipped with on the upper sliding of built-in steel casing pipe (2), gasbag layer (3) include a plurality of mutually independent gasbag ring portion (31), conveying pipeline (4) with gasbag ring portion (31) one-to-one are worn to be equipped with on built-in steel casing pipe (2), conveying pipeline (4) communicate the inner chamber of built-in steel casing pipe (2) with the inner chamber of gasbag ring portion (31), be provided with the driving piece that is used for driving conveying pipeline (4) to remove in built-in steel casing pipe (2), conveying pipeline (4) are close to the one end of gasbag ring portion (31) and can remove to the position butt in anchor hole (1) inner wall with gasbag ring portion (31) butt under the effect of driving piece.
2. The construction method of the anti-floating anchor rod in the karst area according to claim 1, wherein: different ends, far away from the air bag ring part (31), of the material conveying pipes (4) are communicated with the same connecting hose (52), and the material conveying pipes (4) are provided with one-way valves for controlling gas or liquid to flow from one end, far away from the air bag ring part (31), of the material conveying pipes (4) to one end, close to the air bag ring part (31);
in the step S3, high-pressure gas or cement slurry is supplied into the airbag ring portion (31) through the connecting hose (52) and the feed pipe (4).
3. The construction method of the anti-floating anchor rod in the karst area according to claim 1, wherein: and a pipe orifice (41) at one end of the material conveying pipe (4) close to the air bag ring part (31) is obliquely and downwards arranged.
4. The construction method of the anti-floating anchor rod in the karst area according to claim 1, wherein: the gas bag conveying device is characterized in that the conveying pipe (4) is connected to the built-in steel sleeve (2) in a sliding mode along the radial direction of the built-in steel sleeve (2), and an elastic assembly (6) used for driving the conveying pipe (4) to move away from the gas bag ring portion (31) is arranged on the inner wall of the built-in steel sleeve (2).
5. The construction method of the anti-floating anchor rod in the karst area according to claim 4, wherein: the driving piece is arranged to be a force application rod (7) coaxial with the built-in steel sleeve (2), and the force application rod (7) sequentially drives the material conveying pipe (4) to move towards the air bag ring part (31) from top to bottom.
6. The construction method of the anti-floating anchor rod in the karst area according to claim 5, wherein: the inner cavity of the force application rod (7) is hollow, two ends of the force application rod are opened, and the anchor rod can be inserted into the inner cavity of the force application rod (7).
7. The construction method of the anti-floating anchor rod in the karst area according to claim 2, wherein: one end of the conveying pipe (4) positioned in the built-in steel sleeve (2) is communicated with a conveying hose (51), and the conveying hose (51) is used for conveying high-pressure gas or cement paste into the conveying pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110869906.7A CN113481986B (en) | 2021-07-30 | 2021-07-30 | Anti-floating anchor rod construction method in karst area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110869906.7A CN113481986B (en) | 2021-07-30 | 2021-07-30 | Anti-floating anchor rod construction method in karst area |
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| CN113481986A CN113481986A (en) | 2021-10-08 |
| CN113481986B true CN113481986B (en) | 2022-02-15 |
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| CN114232624B (en) * | 2021-12-21 | 2023-10-20 | 亚鑫建设集团有限公司 | Ground anchor device with prevent outer load structure for construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19520363A1 (en) * | 1995-06-08 | 1996-12-12 | Abo Ges Fuer Anwendung Und Ber | Laying natural gas or crude oil pipelines in moorland, fell or permafrost ground with geo-lattice network for soil consolidation |
| CN108411904B (en) * | 2018-05-09 | 2023-10-17 | 中铁十四局集团建筑工程有限公司 | Reinforced concrete cloth bag pile structure for local filling of large karst stratum and process |
| CN109750662B (en) * | 2019-01-10 | 2020-07-10 | 湖北工业大学 | Construction method of foundation pile penetrating through karst cave section |
| CN211621548U (en) * | 2019-11-13 | 2020-10-02 | 浙江省普陀地基基础工程有限公司 | Karst foundation local adds thick liquid reinforcing apparatus |
| CN111827275A (en) * | 2020-08-21 | 2020-10-27 | 安徽省路桥工程集团有限责任公司 | Karst area pile foundation construction system and construction method |
| CN213476861U (en) * | 2020-09-26 | 2021-06-18 | 中积兴业建设集团有限公司 | Hard corrugated pipe for anchor cable support construction |
| CN213805383U (en) * | 2020-11-30 | 2021-07-27 | 文山州广那高速公路投资建设开发有限公司 | Small-size solution cavity area pile foundation construction envelope |
| CN112962595A (en) * | 2021-02-22 | 2021-06-15 | 王大亮 | Anchor rod |
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