CN116065595B - Device for reinforcing foundation pit side slope by electroosmosis combined anchor rod and construction method thereof - Google Patents
Device for reinforcing foundation pit side slope by electroosmosis combined anchor rod and construction method thereof Download PDFInfo
- Publication number
- CN116065595B CN116065595B CN202310032123.2A CN202310032123A CN116065595B CN 116065595 B CN116065595 B CN 116065595B CN 202310032123 A CN202310032123 A CN 202310032123A CN 116065595 B CN116065595 B CN 116065595B
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- Prior art keywords
- anchor rod
- slope
- foundation pit
- anode
- hollow
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 17
- 238000005370 electroosmosis Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 77
- 229910052742 iron Inorganic materials 0.000 claims abstract description 39
- 239000002689 soil Substances 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 239000002344 surface layer Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 244000208734 Pisonia aculeata Species 0.000 claims description 2
- 230000005684 electric field Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001632 homeopathic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a device for reinforcing a foundation pit slope by an electroosmosis combined anchor rod and a construction method thereof, wherein the device comprises an anchor rod component and a slope protection wire netting, wherein the anchor rod component is arranged in a drilling hole of the foundation pit slope, and the slope protection wire netting is arranged on a soil body on the surface layer of the foundation pit slope; the anchor rod component comprises a spiral anchor shaft, a hollow anchor rod and an iron anode, wherein a thread groove is formed in the inner wall of the hollow anchor rod, the iron anode is initially arranged in the thread groove, and a volute channel is formed in the lower end of the hollow anchor rod; the outer wall of the screw anchor shaft is provided with external threads which are matched with the thread grooves; when the spiral anchor shaft is screwed downwards in the hollow anchor rod, the iron anode is extruded, so that the iron anode is finally unfolded into a scroll disk structure under the guidance of the scroll channel; the iron anode is connected with the anode of an external direct current power supply and is used as an anode; the slope protection wire netting is connected with an external direct current power supply negative electrode and is used as a negative electrode. The invention combines electroosmosis on the basis of anchor rod slope protection to drain and fix the slope, and can further improve the stability of foundation pit slope fixation.
Description
Technical Field
The invention relates to foundation pit slope reinforcement, in particular to a device for reinforcing a foundation pit slope by an electroosmosis combined anchor rod and a construction method thereof.
Background
Foundation pit excavation is required before building construction, foundation pit slopes are generally unstable and damaged due to insufficient supporting force, and certain reinforcing treatment is required to meet corresponding construction specification requirements. In slope treatment construction, an anchor rod supporting mode is often adopted, the prepared rod column is driven into a ground rock mass or a hole drilled in advance in the rock mass, and the special structures of the head part and the rod body and the tail support plate are utilized, or surrounding rock and a stable rock mass are combined together by means of bonding to generate a suspension effect, a combined beam effect and a reinforcing effect so as to achieve the purpose of supporting. However, in practice the effect of reinforcing the side slope solely by the anchors is not ideal.
Disclosure of Invention
The invention aims to: the invention aims to provide a device for reinforcing a foundation pit side slope by an electroosmosis combined anchor rod with a better reinforcing effect and a construction method thereof.
The technical scheme is as follows: the invention provides a device for reinforcing a foundation pit slope by an electroosmosis combined anchor rod, which comprises anchor rod components and slope protection wire meshes, wherein the anchor rod components are arranged in holes of the foundation pit slope, and the slope protection wire meshes are distributed on the surface soil of the foundation pit slope; the anchor rod component comprises a spiral anchor shaft, a hollow anchor rod and an iron anode, wherein a thread groove is formed in the inner wall of the hollow anchor rod, the iron anode is initially arranged in the thread groove, and a volute channel is formed in the lower end of the hollow anchor rod; the outer wall of the screw anchor shaft is provided with external threads which are matched with the thread grooves; when the spiral anchor shaft is screwed downwards in the hollow anchor rod, the iron anode is extruded, so that the iron anode is finally unfolded into a scroll disk structure under the guidance of the scroll channel; the iron anode is connected with the anode of an external direct current power supply and is used as an anode; the slope protection wire netting is connected with an external direct current power supply negative electrode and is used as a negative electrode.
In the invention, after direct current is introduced into soil, soil water migrates from anode to cathode under the action of an electric field and is discharged from cathode. Due to the reduction of the water content of the soil body, sedimentation is generated at different positions of the soil body, the soil body is gradually compacted, and the shear strength of the soil body is increased, so that the effect of reinforcing the foundation is achieved. According to the invention, the foundation pit slope is anchored by anchor rod construction and combined with electroosmosis drainage consolidation, so that the stability of the foundation pit slope can be further improved. In addition, the effective anchoring depth of the anchor rod component can be further improved by continuously inserting the spiral anchor shaft into deeper soil bodies in a downward rotating manner; the iron anode is finally unfolded into a scroll disk structure through the scroll channel, the contact area between the iron anode and the soil body is effectively enlarged, and the iron anode corresponds to the slope protection wire netting paved on the surface soil body to provide a direct current electric field for the soil body in between.
Further, the hollow anchor rod is formed by fixing two semi-hollow rod bodies through a connecting ring. The hollow anchor rod is assembled through the connecting ring, so that before construction, an iron anode is arranged in the thread groove.
Further, a cross-shaped slot is formed in the top end of the screw anchor shaft so as to rotate the screw anchor shaft.
Further, a conical anchor head is arranged at the bottom of the spiral anchor shaft.
Further, the outer wall of the hollow anchor rod is rotatably provided with a pulling-resistant pile, and when the hollow anchor rod is pulled back upwards, the pulling-resistant pile is rotated and inserted into a soil body. After the uplift pile is inserted into the soil body of the peripheral wall, the whole uplift capacity of the anchor rod component can be improved.
The invention provides a construction method of a device for reinforcing a foundation pit side slope by an electroosmosis combined anchor rod, which comprises the following steps:
(1) Drilling and clearing holes on the side slope of the foundation pit according to a construction scheme;
(2) An iron anode is arranged in a hollow anchor rod, the hollow anchor rod is arranged in a drill hole, the pullback is carried out after bottoming, and a uplift pile is inserted into a peripheral wall soil body in a homeopathic manner;
(3) Screwing the spiral anchor shaft downwards, extruding the iron anode, screwing out from the volute channel, and finally unfolding the iron anode into a volute disk-shaped structure;
(4) After the anchor rod component is installed, connecting an iron anode with an external direct current power supply anode, grouting at a drilling position, and sealing an anchor rod hole after grouting is completed;
(5) Arranging slope protection wire meshes on soil on the surface layer of the slope, connecting the slope protection wire meshes with the negative electrode of an external direct current power supply, and electrifying;
(6) And (5) measuring the surface soil strength, and switching off the power supply after reaching the standard, so that the construction is completed.
The working principle of the invention is as follows: the foundation pit side slope is anchored through anchor rod construction, collapse is prevented, soil in a specific area is further subjected to drainage consolidation by combining electroosmosis, slope consolidation is performed on the basis of slope protection, stability of the foundation pit side slope can be effectively improved, and building construction requirements are met.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages: the invention can further improve the stability of foundation pit slope fixation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the embodiments of the present invention, and it is obvious that the drawings described below are only embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a rock bolt member;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view of the internal structure of the anchor member;
FIG. 4 is a schematic view of the upper end structure of the screw anchor shaft;
FIG. 5 is a schematic view of the anchor member in use;
FIG. 6 is a construction layout of the present invention;
reference numerals: the novel high-strength steel bar comprises the following components of a 1-anchor bar component, a 110-spiral anchor shaft, a 111-cross-shaped slot, a 112-inner shaft, a 113-external thread, a 114-conical anchor head, a 120-hollow anchor bar, a 121-thread slot, a 122-semi-hollow bar body, a 123-connecting ring, a 124-uplift pile, a 125-volute channel, a 130-iron anode and a 2-slope protection wire mesh.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention based on the embodiments of the present invention.
As shown in fig. 1 to 6, an apparatus for reinforcing a foundation pit slope by an electroosmosis combined anchor rod comprises an anchor rod member 1 and a slope protection wire netting 2, wherein the anchor rod member 1 comprises a screw anchor shaft 110, a hollow anchor rod 120 and an iron anode 130.
The screw anchor shaft 110 is a solid high carbon steel rod, and the main body part is an inner shaft 112. The screw anchor shaft 110 is provided at an upper end thereof with a cross-shaped slot 111 so as to be combined with an external lever, so that the screw anchor shaft 110 is screwed down to press the iron anode 130 and is inserted down into a deep soil body. The lower end of the screw anchor shaft 110 is provided with a conical anchor head 114, so that the blocking force in the inserting process can be reduced. The middle section of the screw anchor shaft 110 is provided with an external thread 113, and the external thread 113 is matched with a thread groove 121 formed in the inner wall of the hollow anchor rod 120.
The hollow anchor 120 is fixedly formed by two semi-hollow rod bodies 122 through three groups of connecting rings 123. The outer wall of the hollow anchor rod 120 is rotatably provided with two groups of anti-pulling piles 124, four anti-pulling piles 124 are arranged in different directions, the initial state of each anti-pulling pile 124 is parallel to the semi-hollow rod body 122, the end head of each anti-pulling pile faces upwards, and the anti-pulling piles are inserted into a soil body of the surrounding wall in a manner of being perpendicular to the semi-hollow rod body 122 after the arrangement is completed.
A scroll passage 125 is provided at the lower end of the hollow anchor rod 120, and the scroll passage 125 guides the unscrewing of the iron anode 130. The iron anode 130 is initially arranged in the thread groove 121 on the inner wall of the hollow anchor rod 120, is screwed out of the scroll channel 125 under the action of the downward screwing extrusion of the screw anchor shaft 110, and finally is unfolded into a scroll-shaped disc structure.
Referring to fig. 6, a plurality of anchor rod members 1 are inserted into corresponding holes of a foundation pit slope in a staggered arrangement mode according to design requirements, and slope protection wire meshes 2 are distributed on the surface soil body of the foundation pit slope. The iron anode 130 serving as an anode corresponds to the slope protection wire netting 2 serving as a cathode, is connected with an external direct current power supply, provides a direct current electric field for soil therebetween, performs drainage consolidation treatment on the basis of slope anchoring, and gap water in the soil flows from the anode to the cathode under the action of the electric field, namely migrates from the iron anode 130 to the slope protection wire netting 2, and finally is evaporated by sunlight irradiation on the surface of the slope or is discharged along the slope.
The construction method of the device for reinforcing the foundation pit side slope by the electroosmosis combined anchor rod is introduced as follows, and specifically comprises the following steps:
(1) Selecting sunny weather for construction, determining a side slope area to be treated on a construction site, adopting corresponding instruments to develop a drilling procedure according to a construction scheme, and cleaning for multiple times after drilling and forming to ensure that the inside of the aperture is smooth and stable;
(2) Installing an iron anode 130 according to a thread groove 121 on the inner wall of the hollow anchor rod 120, combining the two semi-hollow rod bodies 122 after embedding, fixing the hollow anchor rod 120 through a connecting ring 123, installing the hollow anchor rod 120 in a drill hole formed in advance on a side slope, pulling back after bottoming, enabling a pulling-out-resistant pile 124 to be inserted into a peripheral wall soil body along the trend, and fixing the hollow anchor rod 120;
(3) Connecting a cross-shaped slot 111 from the upper part of the hollow anchor rod 120 through a corresponding lever, screwing the spiral anchor shaft 110 downwards in a state that the external thread 113 corresponds to the thread slot 121 on the inner wall of the hollow anchor rod 120 until the soil penetration depth is 2/3 of the length of the spiral anchor shaft 110, wherein the iron anode 130 is continuously extruded by the spiral anchor shaft 110 during the process, and the lower end of the iron anode 130 is screwed out of the volute channel 125; after the spiral anchor shaft 110 is downwards rotated, the iron anode 130 finally presents a vortex-shaped disc-shaped unfolding form under the guiding action of the vortex-shaped channel 125, and the anchor rod component 1 is completely installed;
(4) Connecting the iron anode 130 with the anode of an external direct current power supply through a lead, grouting at a drilling position until slurry overflows, and sealing the anchor rod hole;
(5) Arranging a slope protection wire netting 2 on the soil body on the surface layer of the slope, connecting an external direct current power supply negative electrode through a wire, enabling an iron anode 130 to correspond to the slope protection wire netting 2 serving as the negative electrode, switching on the power supply to perform electroosmosis, and enabling water in the soil body to migrate from the anode to the negative electrode under the action of an electric field;
(6) And selecting a corresponding detecting instrument to test the surface soil strength, disconnecting the power supply after meeting corresponding requirements, stopping construction, and finishing and collecting construction devices such as wires and power supplies which can be recycled for next construction.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions that may be easily conceived by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (3)
1. The device for reinforcing the foundation pit side slope by combining the electroosmosis with the anchor rod is characterized by comprising an anchor rod component (1) and a slope protection wire netting (2), wherein the anchor rod component (1) is arranged in a drilled hole of the foundation pit side slope, and the slope protection wire netting (2) is arranged on a soil body on the surface layer of the foundation pit side slope; the anchor rod component (1) comprises a spiral anchor shaft (110), a hollow anchor rod (120) and an iron anode (130), wherein a thread groove (121) is formed in the inner wall of the hollow anchor rod (120), the iron anode (130) is initially arranged in the thread groove (121), and a volute channel (125) is formed in the lower end of the hollow anchor rod (120); an external thread (113) which is matched with the thread groove (121) is arranged on the outer wall of the spiral anchor shaft (110); when the spiral anchor shaft (110) is screwed downwards in the hollow anchor rod (120), the iron anode (130) is extruded, so that the iron anode (130) is finally unfolded into a volute disk-shaped structure under the guidance of the volute channel (125); the iron anode (130) is connected with the anode of an external direct current power supply and is used as an anode; the slope protection wire netting (2) is connected with an external direct current power supply cathode and used as a cathode;
the hollow anchor rod (120) is formed by fixing two semi-hollow rod bodies (122) through a connecting ring (123); a conical anchor head (114) is arranged at the bottom of the spiral anchor shaft (110); the outer wall of the hollow anchor rod (120) is rotatably provided with a pulling-resistant pile (124), and when the hollow anchor rod (120) is pulled back upwards, the pulling-resistant pile (124) rotates and is inserted into soil.
2. An electroosmosis combined anchor rod device for reinforcing a foundation pit slope according to claim 1, characterized in that a cross-shaped slot (111) is provided at the top end of the screw anchor shaft (110) for rotating the screw anchor shaft (110).
3. A method of constructing an electroosmosis combined anchor of claim 1 or 2 for reinforcing a foundation pit slope, comprising the steps of:
(1) Drilling and clearing holes on the side slope of the foundation pit according to a construction scheme;
(2) An iron anode (130) is arranged in a hollow anchor rod (120), the hollow anchor rod (120) is arranged in a drill hole, the pullback is carried out after bottoming, and a pulling-resistant pile (124) is inserted into a peripheral wall soil body in a proper manner;
(3) The iron anode (130) is screwed out of the volute channel (125) after being extruded and finally unfolded into a volute disk-shaped structure;
(4) After the anchor rod component (1) is installed, connecting an iron anode (130) with an external direct current power supply anode, grouting at a drilling position, and sealing an anchor rod hole after grouting is completed;
(5) Arranging a slope protection wire netting (2) on the soil body on the surface layer of the slope, connecting the slope protection wire netting with the negative electrode of an external direct current power supply, and electrifying;
(6) And (5) measuring the surface soil strength, and switching off the power supply after reaching the standard, so that the construction is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310032123.2A CN116065595B (en) | 2023-01-10 | 2023-01-10 | Device for reinforcing foundation pit side slope by electroosmosis combined anchor rod and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310032123.2A CN116065595B (en) | 2023-01-10 | 2023-01-10 | Device for reinforcing foundation pit side slope by electroosmosis combined anchor rod and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116065595A CN116065595A (en) | 2023-05-05 |
| CN116065595B true CN116065595B (en) | 2023-12-22 |
Family
ID=86181567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310032123.2A Active CN116065595B (en) | 2023-01-10 | 2023-01-10 | Device for reinforcing foundation pit side slope by electroosmosis combined anchor rod and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116065595B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11303072A (en) * | 1998-04-22 | 1999-11-02 | Asahi Tec Corp | Underground anchor |
| CN104846711A (en) * | 2015-05-11 | 2015-08-19 | 河海大学 | Electro-osmosis method for reinforcing soil side slope |
| CN212801583U (en) * | 2020-07-09 | 2021-03-26 | 辽宁科技学院 | Special-shaped anchor rod device for slope support |
| CN114622937A (en) * | 2022-03-21 | 2022-06-14 | 西安建筑科技大学 | Double-electrode drainage anchor rod based on electroosmosis principle |
-
2023
- 2023-01-10 CN CN202310032123.2A patent/CN116065595B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11303072A (en) * | 1998-04-22 | 1999-11-02 | Asahi Tec Corp | Underground anchor |
| CN104846711A (en) * | 2015-05-11 | 2015-08-19 | 河海大学 | Electro-osmosis method for reinforcing soil side slope |
| CN212801583U (en) * | 2020-07-09 | 2021-03-26 | 辽宁科技学院 | Special-shaped anchor rod device for slope support |
| CN114622937A (en) * | 2022-03-21 | 2022-06-14 | 西安建筑科技大学 | Double-electrode drainage anchor rod based on electroosmosis principle |
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| Publication number | Publication date |
|---|---|
| CN116065595A (en) | 2023-05-05 |
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