CN108411912A - A kind of convenient method of bolt stress slip casting - Google Patents
A kind of convenient method of bolt stress slip casting Download PDFInfo
- Publication number
- CN108411912A CN108411912A CN201810413511.4A CN201810413511A CN108411912A CN 108411912 A CN108411912 A CN 108411912A CN 201810413511 A CN201810413511 A CN 201810413511A CN 108411912 A CN108411912 A CN 108411912A
- Authority
- CN
- China
- Prior art keywords
- grouting pipe
- pipe
- sealing
- slip casting
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007569 slipcasting Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 238000004873 anchoring Methods 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 17
- 239000011083 cement mortar Substances 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000011440 grout Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- 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
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Abstract
The present invention relates to a kind of convenient methods of bolt stress slip casting, belong to ground foundation engineering technical field.This method includes：Predeterminated position drills；Once grouting pipe, secondary grouting pipe, exhaust pipe and anchor pole are tightly wrapped with woven bag, it is inserted into drilling, woven bag top is 2.0 3.0m at a distance from hell, once grouting pipe, secondary grouting pipe distance from bottom foot of hole distance be 150~250mm, in anchoring depth, the side wall of the secondary grouting pipe is equipped with several slurry outlets, the open end of secondary grouting bottom of the tube and slurry outlet rubber belt sealing；It is described tightly wrap after woven bag diameter it is identical as bore diameter；Sealing of hole；Once grouting；Secondary high-pressure slip-casting.The convenient method of bolt stress slip casting proposed by the present invention, it is ensured that anchor pole ensures its withdrawal resistance to effective grouting and reinforcing of backfill, loose ground and soft clay body.This method has many advantages, such as refuse reclamation, universal adaptability, low cost, easy construction.
Description
Technical field
The invention belongs to bolt support technology fields, and in particular to a kind of convenient method of bolt stress slip casting is used for back
It bankets, the slip casting of loose ground and soft clay body.
Background technology
During underground engineering, mining engineering, foundation pit and the slope project that geotechnical engineering is related to, to prevent stratum deformation
It caves in or unstability, a kind of main support technology reinforced to stratum is bolt grouting.It is to prevent slurries from drilling when slip casting
Middle spilling often covers a upper sealing sleeve (being commonly called as grouting plug) at the aperture position of anchor pole.The form of existing sealing sleeve is all rubber
Gum cover, this rubber sleeve have the disadvantage that：(1) unit price is expensive；(2) complicated, installation operation is cumbersome；(3) rubber encounters chemistry
Material easily reacts, and storage is easy to aging, influences its use；(4) rubber sleeve surface is very smooth, low with the frictional force of hole wall, strong
Under big grouting pressure, rubber sleeve is easy to burst out, and slurries splash, and influence production safety.
Invention content
In view of the disadvantage present in the above-mentioned prior art, the present invention is intended to provide a kind of convenient side of bolt stress slip casting
Method, for convenient and efficient slip casting.
A kind of convenient method of bolt stress slip casting, includes the following steps：
A. determine bore position drilled, borehole cleaning；
B. anchor pole placement, sealing：Once grouting pipe, secondary grouting pipe, exhaust pipe and anchor pole are bundled, with woven bag by one
Secondary Grouting Pipe, secondary grouting pipe, exhaust pipe and anchor pole tightly wrap, and are inserted into drilling, are at a distance from hell at the top of woven bag
2.0-3.0m, once grouting pipe, secondary grouting pipe distance from bottom foot of hole distance be 150~250mm, anchoring segment length
In degree, the side wall of the secondary grouting pipe is equipped with several slurry outlets, and the open end of secondary grouting bottom of the tube and slurry outlet are used
Rubber belt sealing prevents secondary grouting pipe when once grouting from immersing slurries；It is described tightly wrap after woven bag diameter and bore diameter
It is identical；
C. sealing of hole：Cement mortar sealing of hole is used at hell；Woven bag top filling concrete at hell is starched；
D. once grouting：Cement mortar is injected from lower to upper by once grouting pipe, is stopped when cement mortar is overflowed from exhaust pipe
Only slip casting seals once grouting pipe nozzle；
E. secondary high-pressure slip-casting：When the cement consolidating strength that once grouting is formed reaches 1.0~3.0MPa, pass through two
Secondary Grouting Pipe injects high pressure cement slurries, and high pressure cement slurries break through adhesive tape, the slurry outlet on secondary grouting pipe, rive week
Behavior of Hardened Cement Paste is enclosed, anchoring section high-pressure slip-casting body is formed.
The anchor rod body is steel strand wires or reinforcing bar, and an isolating frame is arranged every l.5~2.0m along anchor pole axis direction；
Free section oiling is simultaneously wrapped up using plastic sheath, and the plastic sheath seal of tube of anchoring section intersection and is tightened with iron wire.
In step D, once grouting pressure is 0.5-1.0MPa, voltage stabilizing 1 minute；In step E, secondary grouting pressure is 1.0
~2.0MPa, voltage stabilizing 5 minutes.
In step B, a diameter of 2-3mm of slurry outlet, spacing 800-1000mm.
In step B, the stemming length of woven bag (woven bag tightly wrap after length) is 0.8~1.0m.
In step C, sealing of hole is carried out by horn-like funnel grout injection, cement mortar stemming length is (at the top of woven bag extremely
The distance of hell) it is 2.0~3.0m.
Boring aperture is 100-150mm in step A；When borehole cleaning, it is passed through high-pressure blast with elbow steel pipe and blows off anchor pole mounting hole
In aggregate chips and tiny stone；Check whether the hole depth of anchor pole mounting hole meets the requirements.
In step B, a diameter of 12~25mm of once grouting pipe and secondary grouting pipe, every 1.0-2.0m adhesive tapes by one
Secondary Grouting Pipe, secondary grouting pipe and anchor pole bundle.
The method that once grouting pipe nozzle is sealed in step D can be that once grouting pipe nozzle turns back, and iron wire is used in combination to twine
Around sealing.
It is additionally provided with iron wire outside the woven bag.Woven bag and once grouting pipe, secondary grouting pipe, exhaust pipe and anchor pole in this way
It extorts even closer.
Described exhaust pipe one end is set to outside hole, and the other end is set in hole, away from hell 4.5-5.0m.
By using above-mentioned technology, compared with prior art, beneficial effects of the present invention：This method is by the way that anchor pole to be inserted into
In loose ground body opening, with the sealing of discarded woven bag, grout injection sealing of hole, secondary high-pressure slip-casting, it is ensured that anchor pole is to the soil body
Effective grouting and reinforcing.Anchor pole can initiatively soil mass consolidation, efficiently control its deformation, prevent generation of caving in；Grouting Pipe trepanning into
Row fracture grouting, can to soil body deep pinpoint, quantitative filling, can repeatedly, repeat slip casting, have it is easy for construction, effect is preferable
Advantage；Boring procedure surrounding soil is not easy to be compressed, and cement mortar easily to soil body penetration, forms anchoring section high-pressure slip-casting body, improves
Anchor rod drawing power.Of low cost compared to traditional grouting method, refuse reclamation is environmentally protective；It is easy to use, it is easy to work
People grasps；Permanent durable, woven bag material is non-aging, can use always；High safety and reliability, woven bag is soft, avoids picture
Traditional rubber sleeve, which is burst out, hurts sb.'s feelings；It is highly practical, it is loosely regional to be suitable for the soil properties such as backfill, loose ground and soft clay.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is bolt grouting schematic diagram of the present invention；
Each label is corresponding entitled in figure：1- once grouting pipes；2- secondary grouting pipes；3- exhaust pipes；4- sealing of hole cement
Slurry；5- is bag weaved；6- anchor poles；7- slurry outlets.
Specific implementation mode
Below in conjunction with the accompanying drawings, by the description of embodiment, the present invention and its specific implementation mode are described further, with
Lower embodiment is that explanation of the invention is not limited to following embodiment.
Embodiment 1
A kind of convenient method of bolt stress slip casting, as shown in Figure 1, including the following steps：
A. determine bore position drilled, borehole cleaning；
B. anchor pole placement, sealing：Once grouting pipe 1, secondary grouting pipe 2, exhaust pipe 3 and anchor pole 6 are bundled, woven bag is used
5 tightly wrap once grouting pipe 1, secondary grouting pipe 2, exhaust pipe 3 and anchor pole 6, are inserted into drilling, 5 top of woven bag and hell
Distance be 2.0-3.0m, once grouting pipe 1, secondary grouting pipe 2 distance from bottom 150~250mm of foot of hole, in anchoring section
In length, the side wall of the secondary grouting pipe 2 is equipped with several slurry outlets 7, the open end of 2 bottom of secondary grouting pipe and pulp
The rubber belt sealing of hole 7 prevents secondary grouting pipe when once grouting from immersing slurries；It is described tightly wrap after woven bag 5 diameter and brill
Bore dia is identical；
C. sealing of hole：4 sealing of hole of sealing of hole cement mortar is used at hell；Woven bag top filling concrete at hell
Slurry；
D. once grouting：Cement mortar is injected from lower to upper by once grouting pipe 1, when cement mortar is overflowed from exhaust pipe 3
Stop slip casting, 1 nozzle of once grouting pipe is turned back, iron wire winding sealing is used in combination；
E. secondary high-pressure slip-casting：When the cement consolidating strength that once grouting is formed reaches 1.0~3.0MPa, pass through two
Secondary Grouting Pipe 2 injects high pressure cement slurries, and high pressure cement slurries break through adhesive tape, the injected hole 7 on secondary grouting pipe, rive
Surrounding Behavior of Hardened Cement Paste forms anchoring section high-pressure slip-casting body.
An isolating frame is arranged every l.5~2.0m along anchor pole axis direction in the anchor rod body steel strand wires or reinforcing bar；Anchor
The oiling of bar free segment is simultaneously wrapped up using plastic sheath, sealed with the plastic sheath of anchoring section intersection and is tightened with iron wire.
In step D, once grouting pressure is 0.5-1.0MPa, voltage stabilizing 1 minute；In step E, secondary grouting pressure is 1.0
~2.0MPa, voltage stabilizing 5 minutes.
In step B, a diameter of 2-3mm of slurry outlet 7, spacing 800-1000mm.
In step B, the stemming length of woven bag 5 (woven bag tightly wrap after length) is 0.8~1.0m.
In step C, sealing of hole, 4 stemming length of sealing of hole cement mortar (woven bag top are carried out by horn-like funnel grout injection
Hold to the distance of hell) it is 2.0~3.0m.
Boring aperture is 100-150mm in step A；When borehole cleaning, it is passed through high-pressure blast with elbow steel pipe and blows off anchor pole mounting hole
In aggregate chips and tiny stone；Check whether the hole depth of 6 mounting hole of anchor pole meets the requirements.
In step B, a diameter of 12~25mm of once grouting pipe 1 and secondary grouting pipe 2 will with adhesive tape every 1.0-2.0m
Once grouting pipe 1, secondary grouting pipe 2 and anchor pole 6 bundle.
It is additionally provided with iron wire outside the woven bag.Woven bag and once grouting pipe, secondary grouting pipe, exhaust pipe and anchor pole in this way
It extorts even closer.
Described exhaust pipe one end is set to outside hole, and the other end is set in hole, away from hell 4.5-5.0m.
Reinforcement means of the present invention is described further with reference to specific embodiment.
Foundation depth reaches 18m, and it is rickle that region upper layer, which is the 4th, and lower layer is diabase.
Main construction course according to the convenient method of bolt stress slip casting of the present invention is as follows：
1) it drills：It at foundation pit side-wall longitudinal direction is away from 2.0m under ground elevation, is drilled with drilling machine, aperture 150mm, drill angle
15 ° of degree；
2) borehole cleaning and inspection：It is passed through high-pressure blast with elbow steel pipe and blows off aggregate chips and tiny stone in anchor pole mounting hole；Inspection
Whether the hole depth for looking into anchor pole mounting hole meets the requirements；
3) anchor pole prepares, seals：Anchor pole 6 isSteel strand wires, and five layers of plastics are twined within the scope of freedom length
Cloth, along 6 axis direction of anchor pole every l.5m one isolating frame of setting, exhaust pipe 3, once grouting pipe 1,2 anchor pole of secondary grouting pipe
It should tie up securely；Once grouting pipe 1, secondary grouting pipe 2 are all made of polyethylene pipe, and a diameter of 20mm of Grouting Pipe will with woven bag
Once grouting pipe, secondary grouting pipe, exhaust pipe and anchor pole tightly wrap, and are tightly wrapped in woven bag external application iron wire, are inserted into drilling, once
Grouting Pipe 1, secondary grouting pipe 2 are 200mm with a distance from foot of hole；Every 2.0m adhesive tapes by once grouting pipe 1, secondary grouting
Pipe 2 and anchor pole 6 bundle, and are equipped with slurry outlet 7 in secondary grouting pipe anchoring depth, the diameter 2mm of slurry outlet 7, spacing 1000mm,
Blend compounds band closes 2 bottom port of secondary grouting pipe and slurry outlet 7.Woven bag stemming length is 0.8m.
4) sealing of hole：It is 2m that aperture location, which uses 4 sealing of hole of sealing of hole cement mortar, cement mortar stemming length,；
5) once grouting：M20 cement mortar is injected from lower to upper by once grouting pipe 1, until cement mortar is from exhaust pipe 3
Stop slip casting when spilling, 1 nozzle of once grouting pipe is turned back, it is 0.5MPa that iron wire winding sealing, once grouting pressure, which is used in combination, surely
Pressure 1 minute；
6) secondary high-pressure slip-casting：The cement consolidating strength that secondary high-pressure slip-casting should be formed in once grouting reaches 2.0MPa
When, high pressure cement slurries are injected by secondary grouting pipe 2, high pressure cement slurries pass through the injected hole 7 on secondary grouting pipe 2, split
Behavior of Hardened Cement Paste around is opened, anchoring section high-pressure slip-casting body is formed.Secondary grouting pressure is 2.0MPa, voltage stabilizing 5 minutes.
The example that the above is only the present invention, is not limited in any way protection scope of the present invention.It is all to use equivalents
Or technical solution made of equivalent transformation replacement, it all falls within rights protection scope of the present invention.
Claims (6)
1. a kind of convenient method of bolt stress slip casting, which is characterized in that include the following steps：
A. determine bore position drilled, borehole cleaning；
B. anchor pole placement, sealing：Once grouting pipe (1), secondary grouting pipe (2), exhaust pipe (3) and anchor pole (6) are bundled, with volume
It knits bag (5) to tightly wrap once grouting pipe (1), secondary grouting pipe (2), exhaust pipe (3) and anchor pole (6), be inserted into drilling, woven bag
(5) top with hell at a distance from be 2.0-3.0m, once grouting pipe (1), secondary grouting pipe (2) bottom away from foot of hole
Distance is 150~250mm, and in anchoring depth, the side wall of the secondary grouting pipe (2) is equipped with several slurry outlets (7),
The open end of secondary grouting pipe (2) bottom and slurry outlet (7) use rubber belt sealing；It is described tightly wrap after woven bag (5) diameter with
Bore diameter is identical；
C. sealing of hole：Sealing of hole cement mortar (4) sealing of hole is used at hell；
D. once grouting：Cement mortar is injected from lower to upper by once grouting pipe (1), when cement mortar is overflowed from exhaust pipe (3)
Stop slip casting, seals once grouting pipe (1) nozzle；
E. secondary high-pressure slip-casting：When the cement consolidating strength that once grouting is formed reaches 1.0~3.0MPa, pass through secondary injection
Slurry pipe (2) injects high pressure cement slurries, and high pressure cement slurries break through adhesive tape, pass through the slurry outlet (7) on secondary grouting pipe (2),
It rives Behavior of Hardened Cement Paste around, forms anchoring section high-pressure slip-casting body.
2. a kind of convenient method of bolt stress slip casting as described in claim 1, which is characterized in that the anchor rod body is steel
An isolating frame is arranged every l.5~2.0m along anchor pole axis direction in twisted wire or reinforcing bar；Free section oiling simultaneously uses plastics
Sheath wraps up, and seals with the plastic sheath of anchoring section intersection and is tightened with iron wire.
3. a kind of convenient method of bolt stress slip casting as described in claim 1, which is characterized in that once grouting in step D
Pressure is 0.5~1.0MPa, voltage stabilizing 1 minute；Secondary high-pressure slip-casting pressure is 1.0~2.0MPa, voltage stabilizing 5 minutes in step E.
4. a kind of convenient method of bolt stress slip casting as described in claim 1, which is characterized in that slurry outlet (7) in step B
A diameter of 2-3mm, spacing 800-1000mm.
5. a kind of convenient method of bolt stress slip casting according to claim 1, which is characterized in that woven bag in step B
(5) stemming length is 0.8~1.0m.
6. a kind of convenient method of bolt stress slip casting according to claim 1, which is characterized in that pass through loudspeaker in step C
Shape funnel grout injection carries out sealing of hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413511.4A CN108411912A (en) | 2018-05-03 | 2018-05-03 | A kind of convenient method of bolt stress slip casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413511.4A CN108411912A (en) | 2018-05-03 | 2018-05-03 | A kind of convenient method of bolt stress slip casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108411912A true CN108411912A (en) | 2018-08-17 |
Family
ID=63137591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810413511.4A Pending CN108411912A (en) | 2018-05-03 | 2018-05-03 | A kind of convenient method of bolt stress slip casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108411912A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074886A (en) * | 2019-12-18 | 2020-04-28 | 瑞腾基础工程技术（北京）股份有限公司 | Anchor rod device for tertiary grouting |
| CN111119174A (en) * | 2019-12-31 | 2020-05-08 | 中交路桥建设有限公司 | Prestressed anchor cable structure for repeated splitting grouting and construction method thereof |
| CN111236244A (en) * | 2020-01-08 | 2020-06-05 | 深圳宏业基岩土科技股份有限公司 | Method for treating water leakage of free section of anchor cable on sand layer of foundation pit |
| CN113216016A (en) * | 2021-05-12 | 2021-08-06 | 大连理工大学 | Reinforcing method for bearing structure of old bridge based on reinforcement carbon fiber resin plate internal mesh method in earthquake high-risk area |
| CN113389201A (en) * | 2021-06-30 | 2021-09-14 | 大连理工大学 | Grouting method of efficient anchor rod pressure grouting system |
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| CN104790393A (en) * | 2015-04-23 | 2015-07-22 | 万军利 | Double-anchoring-section prestress anchor cable structure and constructing method thereof |
| CN104831737A (en) * | 2015-04-29 | 2015-08-12 | 孔志坚 | Construction method of basement support for subway station |
| CN105134254A (en) * | 2015-07-27 | 2015-12-09 | 山东大学 | Penetrating tunnel ground boring casing pipe sealing apparatus and operation technology for same |
| CN106089252A (en) * | 2016-08-09 | 2016-11-09 | 北京矿冶研究总院 | Grouting reinforcement method for inhomogeneous loose bodies |
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| DE3844417A1 (en) * | 1988-12-30 | 1990-07-05 | Tgb Technogrundbau Gmbh | Method of producing a grouted anchor which can be retightened and has permanent corrosion protection, and grouted anchor produced by this method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074886A (en) * | 2019-12-18 | 2020-04-28 | 瑞腾基础工程技术（北京）股份有限公司 | Anchor rod device for tertiary grouting |
| CN111119174A (en) * | 2019-12-31 | 2020-05-08 | 中交路桥建设有限公司 | Prestressed anchor cable structure for repeated splitting grouting and construction method thereof |
| CN111236244A (en) * | 2020-01-08 | 2020-06-05 | 深圳宏业基岩土科技股份有限公司 | Method for treating water leakage of free section of anchor cable on sand layer of foundation pit |
| CN113216016A (en) * | 2021-05-12 | 2021-08-06 | 大连理工大学 | Reinforcing method for bearing structure of old bridge based on reinforcement carbon fiber resin plate internal mesh method in earthquake high-risk area |
| CN113389201A (en) * | 2021-06-30 | 2021-09-14 | 大连理工大学 | Grouting method of efficient anchor rod pressure grouting system |
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Application publication date: 20180817 |
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