CN207392196U - A kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure - Google Patents
A kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure Download PDFInfo
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- CN207392196U CN207392196U CN201721376077.4U CN201721376077U CN207392196U CN 207392196 U CN207392196 U CN 207392196U CN 201721376077 U CN201721376077 U CN 201721376077U CN 207392196 U CN207392196 U CN 207392196U
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- 238000005266 casting Methods 0.000 title claims abstract description 23
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 90
- 210000003205 muscle Anatomy 0.000 claims abstract description 34
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 26
- 230000001681 protective effect Effects 0.000 claims abstract description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000003566 sealing material Substances 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 25
- 239000011083 cement mortar Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 241000512259 Ascophyllum nodosum Species 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 210000002435 tendon Anatomy 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002775 capsule Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000003032 molecular docking Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011440 grout Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004162 soil erosion Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
A kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure, including bar bone pipe, bar muscle and cement injection body, it shrinks to form closing tip in the front end of bar bone pipe, the rear end open formation bar muscle of bar bone pipe anchors into mouth, slurry outlet is offered on the tube wall of bar bone pipe, non-return valve is equipped with above the outside of slurry outlet, bar muscle is presstressed reinforcing steel.Non-return valve includes protective cap and air bag.Anchor hole leakage-proof structure includes anchor pole, waterproof of man and sealing material, is blocked between bar bone pipe and waterproof of man through hole with flexible sealing material.Anchor pole, leakage-proof structure and its construction method disclosed in the utility model, anchor structure is simple, leakage-proof structure good leak-proof effect, meets the needs that Practical Project ensures anchor pole quality, protection foundation pit and side slope surrounding enviroment, economizes on resources.
Description
Technical field
The utility model belongs to foundation pit and slope support engineering, ground foundation engineering, and in particular to a kind of not casting anchor pole
And anchor hole leakage-proof structure.
Background technology
The soil taking hole forming anchor pole used in foundation pit stope support, resisting buoyancy of foundation or resistance to plucking structure, generally with following defects：
First, when anchor pole aperture is less than level of ground water, anchor pole drills foundation pit waterproof of man and soil erosion occurs, so as to cause ground outside foundation pit
Deformation effect foundation pit surrounding enviroment, this defect gently then causes the reduction of anchor pole anti-pulling capacity, serious that foundation pit but will be caused nonlocal
Base deformation is damaged so as to cause surrounding enviroment such as foundation pit periphery house, road, underground utilities；2nd, soft stratum, sensitive stratum base
Cheat anchor pole, soil taking hole forming easily cause the outer foundation deformation of foundation pit cause the surrounding enviroment such as foundation pit periphery house, road, underground utilities by
Damage；When the 3rd, below anchor pole water level located underground, anchor bolt construction needs to take retaining wall measure, as steel sleeve retaining wall, mud off,
Cement paste dado etc., these construction methods consume substantial amounts of water or cement and generate a large amount of useless slurries, and waste of resource pollutes again
Environment；When the 4th, as permanent anchor pole, existing bar muscle anticorrosive measure or complicated there are loophole or construction or cost is excessively high,
It is not very good.
Therefore there is an urgent need for researching and developing a kind of novel anchor rod, overcome the problems, such as at present existing for conventional anchor pole and disadvantage, to meet reality
The needs that engineering ensures anchor pole quality, protection foundation pit and side slope surrounding enviroment, economizes on resources.
Utility model content
The purpose of this utility model is to provide a kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure, to solve existing
Drilling waterproof of man as supporting construction anchor pole with the presence of soil taking hole forming anchor pole causes the technology of soil erosion influence surrounding enviroment
Problem；It also to solve existing soil taking hole forming anchor bolt construction and generate the technical issues of a large amount of useless slurry waste of resource pollute environment again；With
And existing soil taking hole forming anchor pole as permanent anchor pole when antiseptic property it is bad the technical issues of.
To achieve the above object, the utility model adopts the following technical solution：
A kind of not casting pore-forming prestressed anchor, including directly squeezing into or being pressed into the bar bone pipe of foundation soil body and stretch into bar bone
Bar muscle in pipe further includes and is simultaneously filled with inside bar bone pipe and wraps up outside bar bone pipe, and the water formed by cement slurry sets
Mud injecting cement paste,
The front end of the bar bone pipe shrinks to form closing tip, and the rear end open formation bar muscle of bar bone pipe anchors into mouth,
Slurry outlet is offered on the tube wall of the bar bone pipe, the slurry outlet is arranged at intervals along the length direction of tube wall, edge
The circumferential direction of tube wall is also arranged at intervals, and being equipped with above the outside of the slurry outlet prevents from being back to from the cement mortar that slurry outlet flows out
Non-return valve in bar bone pipe,
The bar muscle is presstressed reinforcing steel.
The non-return valve includes protective cap and air bag, and the protective cap is fixed on the tube wall of bar bone pipe, covers on slurry outlet
Top, the front end closed rear end of protective cap opens wide, and the sky for accommodating air bag is formed between the tube wall of the protective cap and bar bone pipe
Between, the air bag is rubber bag tank, and the volume after airbag aeration is adapted with the volume in the space, to ensure from slurry outlet outflow
Subject to cement mortar can not be back in bar bone pipe.
The protective cap is the pyrometric cone collectively constituted by the two pieces of set squares and tube wall being welded on bar bone tube wall
Shape cap, the incline and the angle of tube wall that the butted lines of two pieces of set squares is formed are 10 degree~45 degree, and the peak of pyrometric cone is opposite
The height of tube wall is 20mm~50mm.
The Prestress tendon that the bar muscle forms for single presstressed reinforcing steel or one group of presstressed reinforcing steel, the rear end portion of the bar muscle
It stretches out and anchors into the length of mouth as 600mm~1500mm, the position of stretching into of the front end of the bar muscle in bar bone pipe need to surpass forward
Cross the middle part of bar bone pipe.
The presstressed reinforcing steel is full bonding muscle or has soap-free emulsion polymeization section, and the outer surface of the soap-free emulsion polymeization section is coated with lubrication
Layer is simultaneously cased with protection pipe outside the section.
The bar bone pipe is welded still pipe or seamless steel pipe, and nominal diameter is DN20~DN150, and pipe thickness is not small
In 2mm.
The cement injection body is formed by the cement mortar that the ratio of mud is 0.45~0.7, prepares the intensity of the cement of cement mortar
Grade is not less than 32.5.
A kind of anchor hole leakage-proof structure, it is described to intercept water including not casting pore-forming prestressed anchor, waterproof of man and sealing material
It is offered on curtain for the perforative through hole of bar bone pipe, the size of the through hole is more than the outer diameter of bar bone pipe, and the bar bone pipe passes through
Through hole is anchored into foundation soil, and the gap between the rear end portion and through hole of the bar bone pipe is blocked by flexible sealing material, described
The length that waterproof of man outer surface is exposed in the rear end end of bar bone pipe is 50~300mm.
The flexible sealing material is ring packing air bag, staple or kelp.
The utility model has the characteristics that and advantageous effect compared with prior art：
Not casting pore-forming prestressed anchor is not required to soil taking hole forming disclosed in the utility model, by directly squeezing into or being pressed into ground
Bar bone pipe, the inside and outside cement injection body by cement mortar consolidation of bar bone, the bar muscle in bar bone form.Bar bone pipe is directly to be squeezed into
Or in press-in ground, not soil taking hole forming in work progress farthest reduces the sedimentation that anchor bolt construction causes ground around.
Not casting pore-forming prestressed anchor disclosed in the utility model is also not required to casting, and ground is directly squeezed into or be pressed into bar bone pipe
In base soil, there are crowd in-out effects to the foundation soil around anchor pole, therefore the side friction of anchor pole hole wall is more than isodiametric conventional anchor
Bar；Moreover, also slip casing by pressure can be carried out by default injected hole on bar bone pipe, the side frictional resistance of anchor pole hole wall is further improved
Power.
The bar muscle of not casting pore-forming prestressed anchor disclosed in the utility model is peripheral for cement injection body and bar bone pipe, steel
Pipe can guard bar muscle not by ground corrosive medium corrode, cement injection body water can guard bar bone pipe not by the corrosion in ground
Dielectric corrosion ensures that its durability is met the requirements.
Not casting pore-forming prestressed anchor disclosed in the utility model is also not required to draining, below anchor pole water level located underground
When, the drilling construction of the utility model anchor pole does not consume the retaining walls material such as water, cement, economizes on resources.
Anchor hole leakage-proof structure disclosed in the utility model is in bar bone pipe when through foundation pit waterproof of man, and bar bone pipe is with cutting
Gap between water curtain can clog flexible material closure, it is ensured that waterproof of man bolthole position it is water-tight, do not flow soil.
Description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 be the utility model is related to anchor pole pass through foundation pit waterproof of man when anchor structure schematic diagram.
Fig. 2 be the utility model is related to anchor pole for foundation pit without waterproof of man when anchor structure schematic diagram.
Fig. 3 be the utility model is related to anchor pole be used for resisting buoyancy of foundation or resistance to plucking when anchor structure schematic diagram.
Fig. 4 is the cross-sectional structure schematic diagram of the utility model anchor pole.
Fig. 5 is the side structure schematic view of protective cap in the utility model.
Reference numeral：1- bar bones pipe, 2- slurry outlets, 3- protective caps, 4- air bags, 5- cement injections body, 6- bars muscle,
7- waterproof of man, 8- sealing materials, 9- foundation pit side-walls, 10- foundation surfaces.
Specific embodiment
Embodiment is referring to shown in Fig. 1-Fig. 5, a kind of not casting pore-forming prestressed anchor, including directly squeezing into or being pressed into ground
The bar bone pipe 1 of the soil body and the bar muscle 6 in bar bone pipe 1 is stretched into, further include and be simultaneously filled with outside 1 inside of bar bone pipe and package bar bone pipe
Portion, and the cement injection body 5 formed by cement slurry sets.
The front end of the bar bone pipe 1 shrinks to form closing tip, and the rear end open formation bar muscle 6 of bar bone pipe 1 anchors into mouth.
Slurry outlet 2 is offered on the tube wall of the bar bone pipe, the slurry outlet 2 is arranged at intervals along the length direction of tube wall,
It being also arranged at intervals along the circumferential direction of tube wall, the aperture of the slurry outlet in the present embodiment is 3mm~10mm, and pitch-row is 0.5m~2.0m,
Therefore cement injection body 5 with the installation position difference of slurry outlet so as to forming different shape, the cylinder of approximate variable cross-section.
Be equipped with above the outside of the slurry outlet 2 prevent from being back to from the cement mortar that slurry outlet flows out it is inverse in bar bone pipe
Only valve, the non-return valve include protective cap 3 and air bag 4, and the protective cap 3 is fixed on the tube wall of bar bone pipe, covers on slurry outlet 2
Top, the front end closed rear end of protective cap 3 opens wide.Protective cap can protect injected hole and air bag without damage.
Between the tube wall of the protective cap and bar bone pipe formed accommodate air bag space, the air bag 4 be rubber bag tank, air bag
Volume and the volume in the space after 4 inflations are adapted, to ensure that from the cement mortar that slurry outlet flows out bar bone pipe can not be back to
Subject to interior.
In the present embodiment, protective cap 3 is collectively constituted by the two pieces of set squares and tube wall being welded on bar bone tube wall
Triangular pyramidal cap, the incline and the angle b of tube wall that the butted lines of two pieces of set squares is formed are 10 degree~45 degree, and pyrometric cone is most
High point is 20mm~50mm with respect to the height a of tube wall.The size of two pieces of set squares is identical, can be that molding angle steel makes,
It can be individually by steel plate welding production.
The Prestress tendon that the bar muscle 6 forms for single presstressed reinforcing steel or one group of presstressed reinforcing steel, the rear end of the bar muscle 6
Portion, which is stretched out, anchors into the length of mouth as 600mm~1500mm, the front end of the bar muscle 6 in bar bone pipe 1 stretch into position need to
The preceding middle part more than bar bone pipe 1.
The presstressed reinforcing steel is full bonding muscle or has soap-free emulsion polymeization section, and the outer surface of the soap-free emulsion polymeization section is coated with lubrication
Layer is simultaneously cased with protection pipe outside the section.Lubricant layer can be butter, and protection pipe can be made of plastics.
Bar bone pipe 1 in the present embodiment is welded still pipe or seamless steel pipe, and nominal diameter is DN20~DN150, is managed
Wall thickness is not less than 2mm.Cement injection body 5 is formed by the cement mortar that the ratio of mud is 0.45~0.7, prepares the cement of cement mortar
Strength grade is not less than 32.5.
The construction method of this not casting prestressed anchor, construction procedure are as follows：
Step 1: the making of bar bone pipe：Prepare material, caliber, wall thickness and the satisfactory steel pipe of length parameter, in tube wall
On along its length, be circumferentially respectively separated and open up injected hole 2, then welding can be on the tube wall near each injected hole 2
The protective cap 3 of injected hole is completely covered, air bag 4 is then placed in the inside of protective cap 3 and non-return valve is formed to the inflation of air bag 4；
Step 2: the making of bar muscle：Prepare material, diameter and the satisfactory bar muscle 6 of length parameter, the bar muscle 6
For presstressed reinforcing steel, it is necessary to during soap-free emulsion polymeization section, bar muscle surface smear lubricant layer at soap-free emulsion polymeization section and in this section of housing protection pipe；
Step 3: being squeezed into foundation soil or ramming stem bone pipe：Bar bone pipe is squeezed into or is pressed into using special mechanical equipment
In foundation soil and reach precalculated position；
Step 4: prepare cement mortar：Cement mortar is prepared using cement mixer；
Step 5: the inside slip casting to bar bone pipe：
Step a, the flexible grout pipe of anti-backflow device is got out；
Step b, by the rear port of flexible grout pipe connection grouting pump and bar bone pipe or by flexible grout pipe insertion rod bone
In pipe；
Step c, by the cement mortar prepared in step 4 by the foundation soil around slurry outlet and non-return valve injection, noting
The average cement consumption of slurry is 20 kg/m~100kg/m；Flexible grout pipe is extracted after the completion of slip casting, cement slurry sets form cement
Injecting cement paste 5；
Step 6: by bar muscle insertion rod bone pipe：After the completion of slip casting, before the cement mortar initial set in bar bone pipe 1, by bar muscle 6
Insertion rod bone pipe simultaneously reaches precalculated position；
Step 7: maintenance and quality inspection：After cement mortar reaches certain age, carry out an acceptance inspection to prestressed anchor examination
It tests.
According to the different three kinds of situations of set-up mode point with anchor pole of foundation soil in concrete construction method：
First, foundation pit side-wall has waterproof of man, and anchor pole bar bone pipe enters foundation soil obliquely through waterproof of man；
2nd, foundation pit side-wall does not have waterproof of man, and anchor pole bar bone pipe is oblique to be directly entered foundation soil；
Anchor pole when the 3rd, for resisting buoyancy of foundation or resistance to plucking, anchor pole bar bone pipe vertically enter foundation soil.
It is shown in Figure 1, the invention also discloses a kind of anchor hole leakage-proof structure wherein in the first situation, except bag
Above-mentioned not casting pore-forming prestressed anchor is included, further includes waterproof of man 7 and sealing material 8.It is offered in the waterproof of man 7
For 1 perforative through hole of bar bone pipe, the size of the through hole is more than the outer diameter of bar bone pipe, and the bar bone pipe 1 anchors into ground through through hole
In base soil, the gap between the rear end portion and through hole of the bar bone pipe is blocked by flexible sealing material, after the bar bone pipe
End is held to expose the length of waterproof of man outer surface for 50~300mm.The flexible sealing material is ring packing air bag, cotton
Silk or kelp.Here the dry kelp that kelp can eat, dry kelp water-swellable are good plugging materials.
Shown in Figure 2, unlike the first situation, foundation pit side-wall does not have waterproof of man, and anchor pole bar bone pipe is oblique
Foundation soil is directly entered, rest part construction method is consistent.
Shown in Figure 3, unlike the second situation, anchor pole bar bone pipe vertically into foundation soil, apply by rest part
Work method is consistent.
Claims (9)
1. a kind of not casting pore-forming prestressed anchor, it is characterised in that：Bar bone pipe including directly squeezing into or being pressed into foundation soil body
（1）With stretch into bar bone pipe（1）Interior bar muscle（6）, further include and be simultaneously filled with bar bone pipe（1）Outside internal and package bar bone pipe, and
And the cement injection body formed by cement slurry sets（5）,
The bar bone pipe（1）Front end shrink to form closing tip, bar bone pipe（1）Rear end open formed bar muscle（6）Anchor into
Mouthful,
Slurry outlet is offered on the tube wall of the bar bone pipe（2）, the slurry outlet（2）It is arranged at intervals along the length direction of tube wall,
It is also arranged at intervals along the circumferential direction of tube wall, the slurry outlet（2）Outside above be equipped with prevent from slurry outlet flow out cement mortar
The non-return valve being back in bar bone pipe,
The bar muscle is presstressed reinforcing steel.
2. not casting pore-forming prestressed anchor according to claim 1, it is characterised in that：The non-return valve includes protective cap
（3）And air bag（4）, the protective cap（3）It is fixed on the tube wall of bar bone pipe, covers on slurry outlet（2）Top, protective cap（3）
Front end closed rear end open wide, between the tube wall of the protective cap and bar bone pipe formed accommodate air bag space, the air bag（4）
For rubber bag tank, air bag（4）Volume and the volume in the space after inflation are adapted, with ensure from slurry outlet flow out cement mortar without
Subject to method is back in bar bone pipe.
3. not casting pore-forming prestressed anchor according to claim 2, it is characterised in that：The protective cap（3）It is by welding
The triangular pyramidal cap that the two pieces of set squares and tube wall being connected on bar bone tube wall collectively constitute, the docking of two pieces of set squares are linear
Into incline and the angle of tube wall be 10 degree~45 degree, the peak of pyrometric cone is 20mm~50mm with respect to the height of tube wall.
4. the not casting pore-forming prestressed anchor according to claim 1-3 any one, it is characterised in that：The bar muscle
（6）For single presstressed reinforcing steel or the Prestress tendon of one group of presstressed reinforcing steel composition, the bar muscle（6）Rear end portion stretching anchor into mouth
Length for 600mm~1500mm, the bar muscle（6）Front end in bar bone pipe（1）Interior position of stretching into need to be more than bar forward
Bone pipe（1）Middle part.
5. not casting pore-forming prestressed anchor according to claim 4, it is characterised in that：The presstressed reinforcing steel bonds to be complete
Muscle has soap-free emulsion polymeization section, and the outer surface of the soap-free emulsion polymeization section is coated with lubricant layer and is cased with protection pipe outside the section.
6. the not casting pore-forming prestressed anchor according to claim 1,2,3 or 5, it is characterised in that：The bar bone pipe（1）
For welded still pipe or seamless steel pipe, nominal diameter is DN20~DN150, and pipe thickness is not less than 2mm.
7. not casting pore-forming prestressed anchor according to claim 6, it is characterised in that：The cement injection body（5）By
The cement mortar that the ratio of mud is 0.45~0.7 is formed, and the strength grade for preparing the cement of cement mortar is not less than 32.5.
8. a kind of anchor hole leakage-proof structure, it is characterised in that：In advance should including the not casting pore-forming described in claim 1-6 any one
Power anchor pole, waterproof of man（7）And sealing material（8）, the waterproof of man（7）On offer for bar bone pipe（1）Perforative through hole,
The size of the through hole is more than the outer diameter of bar bone pipe, the bar bone pipe（1）It is anchored into through through hole in foundation soil, the bar bone pipe
Gap between rear end portion and through hole is blocked by flexible sealing material, and the rear end end of the bar bone pipe is exposed outside waterproof of man
The length of side surface is 50~300mm.
9. anchor hole leakage-proof structure according to claim 8, it is characterised in that：The flexible sealing material is ring packing gas
Capsule, staple or kelp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721376077.4U CN207392196U (en) | 2017-10-24 | 2017-10-24 | A kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721376077.4U CN207392196U (en) | 2017-10-24 | 2017-10-24 | A kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure |
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| Publication Number | Publication Date |
|---|---|
| CN207392196U true CN207392196U (en) | 2018-05-22 |
Family
ID=62329755
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721376077.4U Active CN207392196U (en) | 2017-10-24 | 2017-10-24 | A kind of not casting pore-forming prestressed anchor and anchor hole leakage-proof structure |
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| Country | Link |
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| CN (1) | CN207392196U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816041A (en) * | 2017-10-24 | 2018-03-20 | 建研地基基础工程有限责任公司 | Non-dumping pore-forming prestressed anchor rod, anchor hole leakage-proof structure and construction method thereof |
-
2017
- 2017-10-24 CN CN201721376077.4U patent/CN207392196U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816041A (en) * | 2017-10-24 | 2018-03-20 | 建研地基基础工程有限责任公司 | Non-dumping pore-forming prestressed anchor rod, anchor hole leakage-proof structure and construction method thereof |
| CN107816041B (en) * | 2017-10-24 | 2023-02-07 | 建研地基基础工程有限责任公司 | Non-dumping hole-forming prestressed anchor rod, anchor hole leakage-proof structure and construction method thereof |
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