CN206581254U - Grouting device and bottom-enlarging prefabricated pile tube - Google Patents
Grouting device and bottom-enlarging prefabricated pile tube Download PDFInfo
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- CN206581254U CN206581254U CN201621231705.5U CN201621231705U CN206581254U CN 206581254 U CN206581254 U CN 206581254U CN 201621231705 U CN201621231705 U CN 201621231705U CN 206581254 U CN206581254 U CN 206581254U
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Abstract
The utility model discloses a kind of grouting device and bottom-enlarging prefabricated pile tube, belong to civil engineering pile foundation field.The grouting device that the utility model is provided, by setting slurry outlet and sealant, can effectively prevent cement mortar from being entered by beam slurry bag in grouting device, efficiently solve the susceptible to plugging problem of Grouting Pipe, simple in construction, dependable performance.Meanwhile, the stake of modified bottom expanding steel pipe and enlarged base concrete pile tube that the utility model is provided can protect slip casting shower nozzle well, and be conducive to pile body to transfer.
Description
Technical field
The utility model is related to grouting device and bottom-enlarging prefabricated pile tube, belongs to civil engineering pile foundation field.
Background technology
Club-footed pile can improve allowable bearing capacity of single pile, reduction construction costs, be favored at home in pile foundation engineering.Expand
Bottom stake is divided into bottom-enlarging filling pile and bottom-enlarging prefabricated stake again, is base-extending deposited by setting slip casting bag and Grouting Pipe to carry out.Slip casting
It is effective to starch bag force feed cement mortar to the beam for being arranged on club-footed pile bottom, beam slurry bag uses seepy material, separates out excessive moisture simultaneously
Fetter cement mortar formation cement mortar enlarged body.
In pore-forming and reaming construction, mud off need to be often used.Sometimes mud can enter beam and starch bag and block Grouting Pipe
Bottom, follow-up grouting with plunger is not carried out.Moreover, setting beam to starch bag and Grouting Pipe on the outside of prefabricated pile, it is unfavorable for prefabricated
Stake decentralization, influences the reliability of pile.Mud present in existing urgent need to resolve construction blocks Grouting Pipe, prefabricated pile and is difficult decentralization
Problem.
Utility model content
For the easily technical barrier such as blocking of Grouting Pipe in base expanding and base expanding pile driving construction, the utility model provides a kind of grouting device,
Using novel slurry filling shower nozzle, the slip casting shower nozzle can prevent mud from starching bag by beam and entering in Grouting Pipe, so as to effectively solve
Grouting Pipe susceptible to plugging technical barrier, and there is simple in construction, easy construction.Meanwhile, the utility model is also carried
The bottom-enlarging prefabricated pile tube of modified, including bottom expanding steel pipe stake and enlarged base concrete stake are supplied, so that grouting device preferably be applied
In bottom-enlarging prefabricated pile tube.
To solve above technical problem, the utility model includes following technical scheme：
A kind of grouting device, for for club-footed pile force feed cement mortar, the grouting device to include Grouting Pipe and slip casting shower nozzle,
Described slip casting shower nozzle one end is fixedly connected with the Grouting Pipe, and other end closing is set, and is set on the side wall of the slip casting shower nozzle
Slurry outlet is equipped with, sealant is enclosed with the corresponding slip casting shower nozzle surrounding of the slurry outlet.
Further, nail is provided between the slurry outlet and the sealant, the nail includes rivet nut and the head of a nail, institute
State rivet nut to be located in the slurry outlet, diameter of the diameter more than the slurry outlet of the top cap, go out described in the head of a nail covering
Starch hole.
Preferably, 1.1~1.8 times of a diameter of pulp bore dia of the described head of a nail.
The invention also discloses a kind of bottom-enlarging prefabricated pile tube, the bottom-enlarging prefabricated pile tube is bottom expanding steel pipe stake, described
Steel-pipe pile bottom termination is provided with the first shrouding, is provided with the second shrouding above first shrouding, first shrouding with
Grout outlet is provided with the side wall of steel-pipe pile between second shrouding；It is additionally provided with the steel-pipe pile such as claim 1-
Grouting device described in 3 any one, the grouting device passes through second shrouding, the pulp hole position of the slip casting shower nozzle
Between first shrouding and second shrouding.
Further, bag is starched covered with individual layer beam in the exterior side wall of the corresponding steel-pipe pile of the grout outlet.
Further, mud displacement pipe is additionally provided with described steel-pipe pile, the mud replaces pipe through described first
Bottom sealing plate and second bottom sealing plate, and sealing is set between first shrouding and the second shrouding.
The invention also discloses a kind of bottom-enlarging prefabricated pile tube, the bottom-enlarging prefabricated pile tube is enlarged base concrete pile tube,
The concrete tubular pile bottom is provided with below steel ring, the steel ring and is welded with closing plate device, and the closing plate device is by upper envelope
Grout outlet is provided with the cavity body structure that plate, lower shrouding and side seal board are surrounded, the side seal board；In the enlarged base concrete pile tube
The grouting device as described in claim any one of 1-3 is additionally provided with, the grouting device passes through the upper sealing plate, the slip casting
The slurry outlet of shower nozzle is located in the closing plate device.
Further, the grout outlet it is corresponding it is described go out sizing device exterior side wall on starch bag covered with individual layer beam.
Further, it is additionally provided with mud displacement pipe in described concrete tubular pile, the mud replaces pipe through on described
Shrouding and lower shrouding, and sealing is set between the upper sealing plate and lower shrouding.
The utility model is allowed to compared with prior art, have the following advantages that and accumulate due to using above technical scheme
Pole effect：
(1) the utility model provide grouting device, by setting slurry outlet and sealant, can effectively prevent cement mortar by
Beam slurry bag enters in grouting device, efficiently solves the susceptible to plugging problem of Grouting Pipe, simple in construction, dependable performance；
(2) the utility model is provided the stake of modified bottom expanding steel pipe and enlarged base concrete pile tube, note can be protected well
Spray nozzle for slurry, and be conducive to pile body to transfer.
Brief description of the drawings
The structural representation for the grouting device that Fig. 1 provides for the utility model first embodiment；
The sectional view for the grouting device that Fig. 2 provides for the utility model first embodiment；
Fig. 3 is G regional enlarged drawings in Fig. 2；
The sectional view for the bottom expanding steel pipe stake that Fig. 4 provides for the utility model second embodiment；
The sectional view for the enlarged base concrete tubulose that Fig. 5 provides for the utility model 3rd embodiment；
A kind of flow chart of the construction method for bottom-enlarging prefabricated pile tube that Fig. 6 provides for the utility model fourth embodiment；
A kind of flow chart element of the construction method for enlarged base concrete pile tube that Fig. 7 provides for the embodiment of the utility model the 5th.
Label is as follows in figure：
Grouting device 100；Grouting Pipe 110；Slip casting shower nozzle 120；Steel plate 121；Slurry outlet 122；Sealant 130；Nail
140；
Steel-pipe pile 200；First shrouding 210；Second shrouding 220；Grout outlet 230；Beam starches bag 240；Mud replaces pipe 250；
Concrete tubular pile 300；Steel ring 310；Closing plate device 320；Upper sealing plate 321；Lower shrouding 322；Side seal board 323；Pulp
Mouth 324；Beam starches bag 330；Mud replaces pipe 340.
Embodiment
The grouting device and bottom-enlarging prefabricated pile tube provided below in conjunction with the drawings and specific embodiments the utility model make into
One step is described in detail.With reference to following explanation and claims, advantages and features of the present utility model will become apparent from.It should be noted
That accompanying drawing is using very simplified form and uses non-accurately ratio, only to it is convenient, lucidly aid in illustrating this reality
With the purpose of new embodiment.
It should also be noted that, in the utility model, " club-footed pile " includes bottom-enlarging prefabricated pile tube and bottom-enlarging filling pile, its
In bottom-enlarging prefabricated pile tube again include bottom expanding steel pipe stake and enlarged base concrete pile tube.The utility model relates generally to herein below：(1)
A kind of grouting device；(2) with the bottom-enlarging prefabricated pile tube of the supporting modified of grouting device.
Embodiment one
Fig. 1 to Fig. 3, the structural representation for the grouting device that wherein Fig. 1 is provided by the present embodiment are referred to, Fig. 2 is this
The sectional view of grouting device in embodiment, Fig. 3 is the enlarged drawing in G regions in Fig. 2.It is new to this practicality below in conjunction with Fig. 1 to Fig. 3
The main points of type are described further.
Grouting device 100 includes Grouting Pipe 110 and slip casting shower nozzle 120, and the bottom of slip casting shower nozzle 120 passes through welding steel 121
Sealing is set, and the other end is fixedly connected with Grouting Pipe 110, and slurry outlet 122 is provided with the side wall of slip casting shower nozzle 120, in note
The outer wrap of spray nozzle for slurry 120 is used for the sealant 130 for blocking the slurry outlet 122.As an example, sealant 130 be adhesive tape or
Rubber strip elastomeric material.In the present embodiment, sealant 130 wraps slurry outlet 122, prevents mud from entering by injected hole 122
Enter in slip casting shower nozzle 120, meanwhile, when base expanding and base expanding is constructed, water under high pressure mud can wash sealant 130 open and be sprayed from slurry outlet 122.
To prevent the mud pressure in the outside of slip casting shower nozzle 120 excessive, crush seal layer 130 causes sealant 130 in pulp
Opening is formed at mouthfuls 122, preferred embodiment to be provided with nail 140, nail between slurry outlet 122 and sealant 130
140 include rivet nut and the head of a nail, and rivet nut is located in slurry outlet 122, and the diameter of top cap is more than the diameter of slurry outlet 122, head of a nail covering
Firmly slurry outlet 122.The embodiment, the mud pressure in the outside of slip casting shower nozzle 120 is transferred to the side wall of slip casting shower nozzle 120 by the head of a nail
On, the sealant 130 for being prevented effectively from elasticity forms opening at slurry outlet 122, and water under high pressure mud can during base expanding and base expanding construction
Wash nail 140 open, and wash sealant 130 open, sprayed from slurry outlet 122.To make the head of a nail effectively cover slurry outlet 122, and make height
Compressed water slurry is easy to wash nail 140 open, is preferably, 1.1~1.8 times of a diameter of pulp bore dia of the head of a nail.
As an example, Grouting Pipe 110 can use a diameter of 25mm steel pipe manufacturings, and joint uses screwed connection；Grouting device
100 bottom 20cm is slip casting shower nozzle 120, and 4 rows totally 16 spacing 3cm, diameter 3mm injected holes are uniformly got out using drill bit
122；With drawing pin that injected hole 122 is stifled tight, outside puts the elastic rubber pipe of same diameter, is obturaged at two ends with adhesive tape；Work as slip casting
When slip casting shower nozzle 120 in water under high pressure mud tire is split, drawing pin ejection, cement mortar flowed out by injected hole 122.
Embodiment two
Referring to Fig. 4, the structural representation for the bottom expanding steel pipe stake that wherein Fig. 4 is provided by the present embodiment.As shown in figure 4,
The bottom termination of steel-pipe pile 200 is provided with the first shrouding 210 and the second shrouding 220, between the first shrouding 210 and the second shrouding 220
Steel-pipe pile 200 side wall on be provided with grout outlet 230；The grouting device in embodiment one is additionally provided with steel-pipe pile 200
100, grouting device 100 passes through second shrouding 220, and the slurry outlet of slip casting shower nozzle is located at the first shrouding 210 and the second shrouding
Between 220.When carrying out base expanding and base expanding construction, water under high pressure mud is sprayed by the slurry outlet of slip casting shower nozzle, then is flowed out by grout outlet 230,
Cement mortar forms the termination of expansion after the bottom solidification of steel-pipe pile 200.Slip casting shower nozzle is placed in the first shrouding 210 and the second envelope
Between plate 220, slip casting shower nozzle can be played a protective role, slip casting shower nozzle in the decentralization process of steel-pipe pile 200 can be prevented
The harder bottom clay layer of insertion or metalling and cause to damage or cause the difficult situation of cement mortar outflow.
Preferably, bag 240, cement mortar are starched covered with individual layer beam in the exterior side wall of the corresponding steel-pipe pile 200 of grout outlet 230
Entered by grout outlet 230 and consolidated in beam slurry bag 240.Beam slurry bag 240 uses seepy material, such as uses woven bag, two ends can pass through
Steel wire lashing is on steel-pipe pile 200.Beam slurry bag 240 can separate out unnecessary moisture, be conducive to improving the speed of cement mortar consolidation,
Cement mortar can also be fettered simultaneously forms more closely knit bellend.
Preferably, mud displacement pipe 250 is additionally provided with steel-pipe pile 200, mud displacement pipe 250 passes through first underseal
210 plates and second bottom sealing plate 220, and sealing is set between the first shrouding 210 and the second shrouding 220.Mud replaces pipe 250
Slurry coat method can be displaced in traditional construction technique.Meanwhile, mud displacement bottom of the tube can use the slip casting spray in embodiment one
The structure type of head, such as opens up displacement hole, sets sealant and nail, the structure type, in the quiet of the utility model offer
It can be used in the construction technology that press planting enters as Grouting Pipe, be conducive to the cement mortar that is formed immediately below in steel-pipe pile 200 to expand
Body.
Embodiment three
Referring to Fig. 5, the structural representation for the enlarged base concrete stake that wherein Fig. 5 is provided by the present embodiment.Pipe of concrete
300 bottoms of stake are provided with steel ring 310, and the lower section of steel ring 300 is welded with closing plate device 320, closing plate device 320 be by upper sealing plate 321,
Grout outlet 324 is provided with the cavity body structure that lower shrouding 322 and side seal board 323 are surrounded, the side seal board 323.Concrete tubular pile
The grouting device 100 in embodiment one is additionally provided with 300, grouting device 100 passes through the upper sealing plate 321, slip casting shower nozzle
Slurry outlet is located in the cavity body structure of closing plate device 320.Slip casting shower nozzle is placed in closing plate device 320, can be to slip casting shower nozzle
Play a protective role, slip casting shower nozzle in the decentralization process of concrete tubular pile 300 can be prevented and insert harder bottom clay layer
Or metalling and cause to damage or cause the difficult situation of cement mortar outflow.
Preferably, in the exterior side wall of enlarged base concrete pile tube 300 and side seal board 323 outer side covers have individual layer beam starch bag
330, beam slurry bag 330 is corresponding with the position of grout outlet 324.Cement mortar is entered by grout outlet 324 to be consolidated in beam slurry bag 330.Beam
The structure for starching bag 330 is similar with embodiment two, does not repeat herein.
Preferably, mud displacement pipe 340 is additionally provided with enlarged base concrete pile tube 300, mud displacement pipe 340 passes through upper envelope
Plate 321 and lower shrouding 322, and sealing is set between upper sealing plate 321 and lower shrouding 322.Mud displacement pipe 340 can be used for replacing
Slurry coat method during pore-forming, may be simultaneously used for force feed cement mortar, be conducive to the bottom in enlarged base concrete pile tube 300 to be formed
The termination of expansion.Similar with embodiment three, in static pressure implantation construction technology, mud displacement pipe 340 can make as Grouting Pipe
With repeating no more.
Example IV
Referring to Fig. 6, a kind of flow chart of the construction method for bottom-enlarging prefabricated pile tube that Fig. 6 provides for the present embodiment.Base expanding and base expanding
Prefabricated tubular pile is the bottom expanding steel pipe stake in embodiment two or the enlarged base concrete pile tube in embodiment three, and the construction method includes
Following steps,
S11. using single tube cement-soil mixing pile machine drilling, direct-injection or churning cement grout are carried out with foundation soil at drill bit
Stirring mixing repeatedly, forms columnar water soil mixing pile pile body.
S12. bottom-enlarging prefabricated pile tube is prepared, and colligation beam starches bag on the side wall of the pile body bottom of the prefabricated tubular pile.Beam
Bag is starched using individual layer beam slurry bag, beam slurry bag is directly sleeved on the bottom of prefabricated tubular pile, and beam starches the upper and lower ends steel wire lashing of bag
On prefabricated tubular pile.Beam slurry bag should leave the surplus of certain length, to be stretched in being constructed in base expanding and base expanding to prefabricated tubular pile surrounding.
In addition, the beam containing certain length surplus starches bag when prefabricated tubular pile is transferred, beam can be caused to starch between bag and retaining wall and rubbed, even
Beam is starched bag and breakage occur, it is therefore preferable that bag is starched first with fine rule colligation on prefabricated tubular pile for beam, while ensureing in high pressure cement
It can be easier to thrust fine rule under the impact of slurry, beam is starched bag and outwards eject.When beam slurry bag is installed, the intact of beam slurry bag should be checked
Property, if any breakage, it should change.The upper and lower ends of beam slurry bag answer colligation firmly, and beam slurry bag and pile body should be checked before decentralization
Connection, it is necessary to assure fixation.
S13. the prefabricated tubular pile in step S12 is implanted into cement mixing method with Static pressure pile driver.Replaced setting mud
Guan Shi, mud displacement pipe can displace part of cement soil paste liquid, in order to which prefabricated tubular pile is transferred.
S14. after soil cement is conserved 16~24 hours, cement mortar is injected by stake bottom by Grouting Pipe using high-pressure injection pump
Beam slurry bag in, beam slurry bag constantly expanded under high pressure cement slurry actions, extrude prefabricated pile surrounding soil, finally in prefabricated pipe
Stake bottom termination periphery forms cement mortar enlarged body.As an example, injecting paste material uses cement mortar, and the ratio of mud is 0.55~
Between 0.60；Cement is 42.5 grades of Portland cements of P.O, and sand is preferably middle sand, and clay content is not more than 3%.In addition, slip casting
The stirring system used should have two slurries buckets：Agitator and Sheng slurry bucket, cement grout must pass through filter screen after agitator stirring
After filtering, into special Sheng slurry bucket；Stirring system should be provided with by containing slurries in slurry bucket, it is ensured that slurries are not isolated, and are contained in slurry bucket and are starched
Liquid standing time not should be greater than 3 hours.Strict control grouting pressure and slip casting speed during slip casting, using grouting amount and grouting pressure
Double control standard, flow rate of grouting is not to be exceeded 50L/min and is not less than design requirement, grouting pressure control 1.0~
1.8Mpa。
The construction technology that the utility model is implanted into using static pressure prepares bottom-enlarging prefabricated pile tube, by straight at the drill bit of rig
Spray or churning cement grout stir with foundation soil and form columnar water soil mixing pile pile body repeatedly, reduce in traditional handicraft
The step of mud off, save a large amount of mud；Meanwhile, holding for bottom-enlarging prefabricated pile tube can be increased by preparing cement mixing method pile body
Carry power.Therefore, compared with traditional construction technology, using static pressure implantation construction technology can reduce drilling diameter, to shorten stake long,
There is environmental protection, efficient, section material.
Embodiment five
Referring to Fig. 7, a kind of flow chart of the construction method for bottom-enlarging filling pile that Fig. 7 provides for the present embodiment.It is described to apply
Work method comprises the following steps,
S21. drill hole of drilling machine is used, to designed elevation, bottom reaming is carried out.Drilled setting to pile body with normal drill bit first
Meter height, is then replaced by reaming bit and carries out reaming.
S22. steel reinforcement cage, and grouting device of the colligation as described in embodiment one in steel reinforcement cage are prepared, and in steel reinforcement cage
Colligation beam in bottom starches bag, and the slip casting shower nozzle of injected hole correspondence position is stretched into beam slurry bag.Beam slurry bag is double-deck using double-deck beam slurry bag
Beam starches bag and starches being distinguished as bag with individual layer beam：Double-deck beam slurry bag inherently pocket is filled, and cement mortar is directly poured into beam slurry bag simultaneously
Cement mortar enlarged body is formed in beam slurry bag；And individual layer beam slurry bag, it is that individual layer woven cloth forms pocket-like by prefabricated tubular pile, i.e.,
Cement mortar enlarged body side is that beam slurry bag, opposite side are prefabricated tubular pile.For ease of decentralization, preferably beam slurry bag first uses fine rule colligation
On steel reinforcement cage, while ensureing to be easier to thrust fine rule under the impact of water under high pressure mud, beam is starched bag and outwards eject.Together
When, it also should ensure that and look into the integrity that beam starches bag, if any breakage, should change.
S23. the steel reinforcement cage prepared in step S22 is transferred into designed elevation, and the concrete perfusion into drilling, prepares coagulation
Native bored concrete pile.
S24. by grouting device force feed cement mortar, beam slurry bag is expanded and extrudes surrounding soil, finally in bored concrete pile bottom
Termination periphery forms cement mortar enlarged body.
Foregoing description is only the description to the utility model preferred embodiment, not to any limit of the utility model scope
Calmly, the those of ordinary skill in the utility model field does according to the disclosure above content any change, modification, belonging to right will
Seek the protection domain of book.
Claims (9)
1. a kind of grouting device, for for club-footed pile force feed cement mortar, it is characterised in that the grouting device include Grouting Pipe and
Slip casting shower nozzle, described slip casting shower nozzle one end is fixedly connected with the Grouting Pipe, and other end closing is set, in the slip casting shower nozzle
Slurry outlet is provided with the wall of side, sealant is enclosed with the corresponding slip casting shower nozzle surrounding of the slurry outlet.
2. grouting device as claimed in claim 1, it is characterised in that nail is provided between the slurry outlet and the sealant
Son, the nail includes rivet nut and the head of a nail, and the rivet nut is located in the slurry outlet, and the diameter of the head of a nail is more than the pulp
The diameter in hole, the head of a nail covers the slurry outlet.
3. grouting device as claimed in claim 2, it is characterised in that a diameter of pulp bore dia of the described head of a nail
1.1~1.8 times.
4. a kind of bottom-enlarging prefabricated pile tube, it is characterised in that the bottom-enlarging prefabricated pile tube is bottom expanding steel pipe stake, the steel-pipe pile bottom
Termination is provided with the first shrouding, and the second shrouding, first shrouding and second envelope are provided with above first shrouding
Grout outlet is provided with the side wall of steel-pipe pile between plate；It is additionally provided with the steel-pipe pile such as any one of claim 1-3 institutes
The grouting device stated, the grouting device passes through second shrouding, and the slurry outlet of the slip casting shower nozzle is located at described the
Between one shrouding and second shrouding.
5. bottom-enlarging prefabricated pile tube as claimed in claim 4, it is characterised in that the corresponding steel-pipe pile of the grout outlet it is outer
On the wall of portion side bag is starched covered with individual layer beam.
6. bottom-enlarging prefabricated pile tube as claimed in claim 4, it is characterised in that mud displacement is additionally provided with described steel-pipe pile
Pipe, the mud replaces pipe through first shrouding and the second shrouding, and close between first shrouding and the second shrouding
Envelope is set.
7. a kind of bottom-enlarging prefabricated pile tube, it is characterised in that the bottom-enlarging prefabricated pile tube is enlarged base concrete pile tube, the concrete
Pile tube bottom is provided with steel ring, is welded with closing plate device below the steel ring, the closing plate device be by upper sealing plate, lower shrouding and
Grout outlet is provided with the cavity body structure that side seal board is surrounded, the side seal board；Be additionally provided with the enlarged base concrete pile tube as
Grouting device described in claim any one of 1-3, the grouting device pass through the upper sealing plate, the slip casting shower nozzle it is described
Slurry outlet is located in the closing plate device.
8. bottom-enlarging prefabricated pile tube as claimed in claim 7, it is characterised in that go out sizing device described in the grout outlet is corresponding
In exterior side wall bag is starched covered with individual layer beam.
9. bottom-enlarging prefabricated pile tube as claimed in claim 8, it is characterised in that be additionally provided with mud in described concrete tubular pile
Displacement pipe, the mud replaces pipe through the upper sealing plate and lower shrouding, and seals and set between the upper sealing plate and lower shrouding
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621231705.5U CN206581254U (en) | 2016-11-16 | 2016-11-16 | Grouting device and bottom-enlarging prefabricated pile tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621231705.5U CN206581254U (en) | 2016-11-16 | 2016-11-16 | Grouting device and bottom-enlarging prefabricated pile tube |
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| CN206581254U true CN206581254U (en) | 2017-10-24 |
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ID=60108369
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759277A (en) * | 2016-11-16 | 2017-05-31 | 上海市建工设计研究院有限公司 | Grouting device, bottom-enlarging prefabricated pile tube, bottom-enlarging filling pile and its construction method |
| CN110318683A (en) * | 2018-03-29 | 2019-10-11 | 中国二十冶集团有限公司 | Cement mixing pile drill bit gunniting hole preventing clogging up device and its application method |
-
2016
- 2016-11-16 CN CN201621231705.5U patent/CN206581254U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759277A (en) * | 2016-11-16 | 2017-05-31 | 上海市建工设计研究院有限公司 | Grouting device, bottom-enlarging prefabricated pile tube, bottom-enlarging filling pile and its construction method |
| CN110318683A (en) * | 2018-03-29 | 2019-10-11 | 中国二十冶集团有限公司 | Cement mixing pile drill bit gunniting hole preventing clogging up device and its application method |
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