CN208395813U - A kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance - Google Patents
A kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance Download PDFInfo
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- CN208395813U CN208395813U CN201820683874.5U CN201820683874U CN208395813U CN 208395813 U CN208395813 U CN 208395813U CN 201820683874 U CN201820683874 U CN 201820683874U CN 208395813 U CN208395813 U CN 208395813U
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Abstract
The utility model discloses a kind of grouting behind shaft or drift lining systems for increasing perfusion shaft resistance, the utility model passes through grouting pressure pipe, annular Grouting Pipe and slip casting bar are to pile body by the way of high-pressure slip-casting, it is that pile concrete is squeezed to soil around pile soil side, pile body generates cyclic annular protuberance, annular concrete structure is formed on the outside of pile body, improve the pressure between stake soil and improves the coefficient of friction between stake and soil around pile, to achieve the purpose that improve pile bearing capacity.Wherein grouting pressure pipe is equipped with necking section, can increase leakproofness when slip casting；Slip casting bar uses special designing, and stability when improving closure when slip casting, and increasing slip casting prevents slip casting bar from generating torsion due to pressure in Grouting Pipe.Grouting system and slurry injection technique in the utility model are used in the long bored concrete pile of various soil layers, different-diameter size and piles with different, and construction technology is simple, and construction method and used material of constructing are flexible and changeable, are convenient for universal and promote.
Description
Technical field
The utility model relates to pile foundation engineering and pile foundation reinforcement technical fields more particularly to a kind of increase, and shaft resistance is perfused
Grouting behind shaft or drift lining system.
Background technique
With the development of the times, the increase of population, not only the quantity of skyscraper is increasing both at home and abroad, but also high level is built
The total height built is also higher and higher, this means that the development for pushing high-bearing capacity deep foundation seems especially in field of civil engineering
It is important.So at home and abroad in civil construction project, bored concrete pile using very universal.But since China's geological conditions is multiple
It is miscellaneous, can not accomplish all bored concrete piles may be designed to for end-bearing pile or friction end-bearing pile stake, especially in coastal area, friction pile
It is more common with point friction pile.
The bearing capacity of stake consists of two parts, side skin friction and end resistance including stake, for friction pile, stake
Bearing capacity mainly completed by side skin friction, physically the fundamental formular of frictional resistance is: F- μ N
In above-mentioned formula μ this be to determine that pile body is more coarse by the degree of roughness of pile body, pile body and soil around pile it is opposite
Friction coefficient μ is bigger；This is to determine that pressure is bigger by the pressure between pile body and soil around pile to the N of above-mentioned formula, friction resistance
Power is bigger.
The so-called grouting system for increasing perfusion shaft resistance and method are the methods for using high-pressure slip-casting to pile body, make pile body
Concrete is squeezed to soil around pile soil side, and pile body generates cyclic annular protuberance, is formed annular concrete structure on the outside of pile body, is improved stake soil
Between pressure and improve the coefficient of friction between stake and soil around pile, thus achieve the purpose that improve pile bearing capacity.
Utility model content
The utility model aim is exactly in order to make up the defect of prior art, after providing a kind of increase perfusion shaft resistance
Grouting system.
The utility model is achieved through the following technical solutions:
A kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance includes slip casting hose, grouting pressure pipe and annular slip casting
Pipe, is provided with pressure pipe grout outlet on the grouting pressure pipe, slip casting bar, the note is equipped with inside grouting pressure pipe
Slurry hose is connect with the top of slip casting bar, and slip casting bar slurry outlet is provided on slip casting bar, is provided with Grouting Pipe in annular Grouting Pipe
Stock inlet and Grouting Pipe grout outlet, the pressure pipe grout outlet are connected to Grouting Pipe stock inlet, and mud enters from slip casting hose
In slip casting bar, enter inside grouting pressure pipe from slip casting bar slurry outlet, then enter in annular Grouting Pipe from pressure pipe grout outlet, most
Mud is gone out from Grouting Pipe grout outlet afterwards.
The grouting pressure tube cavity wall is set there are three the axial card slot being centrosymmetric, and grouting pressure inside pipe wall is every
Every 2m at micro-necking contracting shape, a pressure pipe grout outlet is equipped at every section of micro-necking contracting shape.
The slip casting bar is made of pulp steel pipe, two closed heads, bowl-shape stop grouting plug and pie stop grouting plug, described
Several slip casting bar slurry outlets are provided on pulp steel pipe, two closed heads are separately fixed at pulp steel pipe both ends, in closed head
Side passes through adjustable spring respectively and is connected with three corresponding with three card slots of the grouting pressure inside pipe wall symmetrically
Pulley, pulley are stuck in the card slot of grouting pressure pipe and slide, and the diameter of the bowl-shape stop grouting plug and pie stop grouting plug is greater than note
Starch pressure micro-necking contracting shape section diameter and less than grouting pressure pipe diameter, after slip casting bar is put into grouting pressure pipe by when slip casting, bowl
Shape stop grouting plug and pie stop grouting plug form a chamber with the inner wall of grouting pressure pipe micro-necking contracting shape section respectively, and the slip casting is soft
Pipe is connect with the top of pulp steel pipe.
The closed head is the pie being formed from steel, and the pulley is wrapped up with rubber material, it is described it is bowl-shape only
Slurry plug and pie stop grouting plug are made of high elastic rubber material.
There are two centrosymmetric Grouting Pipe stock inlet and several equidistant Grouting Pipes in the annular Grouting Pipe
Grout outlet, Grouting Pipe stock inlet connect with pressure pipe grout outlet, check-valves are equipped in each Grouting Pipe stock inlet, in each slip casting
Pipe grout outlet is equipped with one-way pressure valve.
One-way pressure valve described in several is equidistantly mounted on Grouting Pipe grout outlet, several one-way pressure valves are dehisced
In arranging clockwise or counter-clockwise, one-way pressure valve is steel thin slice, and one end of steel thin slice is fixed on annular by reinforcing stirrup
In Grouting Pipe, the other end is according to suffered pressure inlet wire opening and closing, and when by external pressure, one-way pressure valve is in envelope
Closed state, by when internal certain pressure be in open configuration.
The utility model has the advantages that: (1) grouting system and slurry injection technique and other technology phase that the utility model use
Than can more effectively increase the pressure and coefficient of friction between stake and soil around pile, can effectively improve bored concrete pile and especially rub
Wipe the bearing capacity of bored concrete pile；
(2) one-way pressure valve in the annular Grouting Pipe in the utility model is dehisced in equidistant clockwise or counter-clockwise
From being arranged in annular Grouting Pipe, uniformity when injection mud is increased, and outside annular Grouting Pipe internal pressure is greater than
It is opened automatically when portion's pressure, folding size can be controlled by grouting pressure, certainly when internal pressure is less than external pressure
Dynamic closure can prevent after stopping slip casting, due to overpressure forfeiture caused by mud reflux and prevent pile body coagulation
Soil flow enters pipe internal congestion pipeline, increases grouting quality and efficiency；
(3) it is equipped with check-valves in the annular Grouting Pipe stock inlet in the utility model, has mud injection in annular Grouting Pipe
When open, no mud inject when, due to annular Grouting Pipe internal pressure and be closed automatically, to prevent ring-shaped pouring
Mud in slurry pipe flows back into grouting pressure pipe, ensure that slip casting efficiency；
(4) diameter of the grouting pressure pipe necking section of the utility model is slightly less than the stop grouting plug diameter of slip casting bar, Ke Yigeng
The closure of good raising stop grouting plug, easily controllable grouting pressure；
(5) stop grouting plug of the slip casting bar of the utility model omits the common section diameter that diameter is less than grouting pressure pipe, completes
After the slip casting of grouting pressure pipe necking section, slip casting can be continued while slip casting bar continues to move up, mud passes through the sum of stop grouting plug
Gap between the common section of grouting pressure pipe is sprayed downwards, and grouting is compensated, and guarantees continuous grouting in work progress, is improved
The working efficiency of entire grouting behind shaft or drift lining system, improves construction quality.
(6) pulley being arranged on the slip casting rod seal head in the utility model is due to using spring to connect, in slip casting bar (figure
8) pulley can be squeezed inwardly when passing through grouting pressure pipe necking section, when slip casting bar passes through the common section of grouting pressure pipe
Waiting pulley can flick again, since slip casting rod seal head is equipped with pulley and being stuck in slot, can to avoid when slip casting due to pressure
The vibration that effect and hoisting grouting bar generate causes slip casting hose caused by slip casting hose twisting to damage；
(7) the grouting pressure pipe in the utility model is provided with multiple grout outlets along stake length direction and is connected to annular Grouting Pipe,
It is constructed using the grouting behind shaft or drift lining that bored concrete pile different depth requirement can be completed in mobile slip casting of the slip casting bar in two grouting pressure pipes, and
Traditional grouting behind shaft or drift lining system is compared, and buries more Grouting Pipes different in size without the slip casting demand according to different depth, is reduced
Influence of the built-in slip casting pipe to pile body；
(8) the steel closed head in the utility model can be in high-pressure slip-casting for fixing only starching for high-tension rubber
Plug, avoids in high-pressure slip-casting, only starches caused by the cavity indoor pressure that two stop grouting plugs and grouting pressure pipe necking section are formed
Plug deformation turns over, and improves airtightness；
(9) grouting system in the utility model and slurry injection technique are used in various soil layers, different-diameter size and difference
The long bored concrete pile of stake, construction technology is simple, and construction method and used material of constructing are flexible and changeable, is convenient for universal and promotes.
Detailed description of the invention
Fig. 1 is the axial section of the grouting pressure pipe of the utility model.
Fig. 2 is the A-A sectional view of the grouting pressure pipe of the utility model.
Fig. 3 is schematic diagram when the one-way pressure valve collective in the annular Grouting Pipe of the utility model opens.
Fig. 4 is one-way pressure valve closed state schematic diagram in the utility model annular Grouting Pipe.
Fig. 5 be in the utility model annular Grouting Pipe one-way pressure valve by internal pressure open configuration schematic diagram.
Fig. 6 is the non-return valve closure schematic diagram of the utility model annular Grouting Pipe stock inlet.
Fig. 7 is that schematic diagram is opened in the check-valves compression of the utility model annular Grouting Pipe stock inlet.
Fig. 8 is the utility model slip casting rod structure schematic diagram.
Fig. 9 is the utility model slip casting rod seal head schematic top plan view.
Figure 10 is that the utility model slip casting rod seal head is caught in grouting pressure pipe clamp slot schematic diagram.
Figure 11 is the utility model pulley spring connection schematic top plan view.
Figure 12 is schematic top plan view when the utility model pulley is squeezed.
Figure 13 is the schematic diagram that the utility model slip casting bar passes through the common section of grouting pressure pipe.
Figure 14 is the schematic diagram that the utility model slip casting bar passes through grouting pressure pipe necking section.
Figure 15 is the pile body schematic diagram formed after the utility model is constructed.
Specific embodiment
As represented in figures 1 through 14, a kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance, includes slip casting hose 10, slip casting pressure
Solenoid 8 and annular Grouting Pipe 4, are provided with pressure pipe grout outlet 2 on the grouting pressure pipe 8, pacify inside grouting pressure pipe 8
Equipped with slip casting bar, the slip casting hose 10 is connect with the top of slip casting bar, and slip casting bar slurry outlet 16 is provided on slip casting bar,
It is provided with Grouting Pipe stock inlet 5 and Grouting Pipe grout outlet in annular Grouting Pipe 4, the pressure pipe grout outlet 2 and Grouting Pipe are into slurry
Mouth 5 is connected to, and mud enters in slip casting bar from slip casting hose 10, is entered inside grouting pressure pipe 8 from slip casting bar slurry outlet 16, then
Enter in annular Grouting Pipe 4 from pressure pipe grout outlet 2, final slurry is gone out from Grouting Pipe grout outlet.
As shown in Figure 1, 2,8 internal chamber wall of grouting pressure pipe is set there are three the axial card slot 3 being centrosymmetric, and is infused
8 inner wall of pressure pipe is starched every 2m into micro-necking contracting shape 1, is equipped with a pressure pipe grout outlet 2 at every section of micro-necking contracting shape 1.
As shown in Fig. 8,9,10,11,12, the slip casting bar is by pulp steel pipe 11, two closed heads 12, bowl-shape stop grouting plugs
14 and pie stop grouting plug 15 form, several slip casting bar slurry outlets 16, two closed heads are provided on the pulp steel pipe 11
12 are separately fixed at 11 both ends of pulp steel pipe, pass through adjustable spring 17 respectively in the side of closed head 12 and are connected with and the note
Three card slots 3 corresponding three symmetrical pulleys 13 of 8 inner wall of pressure pipe are starched, pulley 13 is stuck in the card slot 3 of grouting pressure pipe 8
The diameter of interior sliding, the bowl-shape stop grouting plug 14 and pie stop grouting plug 15 be greater than 1 diameter of grouting pressure micro-necking contracting shape section and
Less than 8 diameter of grouting pressure pipe, after slip casting bar is put into grouting pressure pipe 8 by when slip casting, bowl-shape stop grouting plug 14 and pie stop grouting plug
15 form a chamber, as shown in Figure 13,14, the slip casting hose with the inner wall of grouting pressure pipe micro-necking contracting shape section 1 respectively
10 connect with the top of pulp steel pipe 11.
The closed head 12 is the pie being formed from steel, and the pulley 13 is wrapped up with rubber material, the bowl
Shape stop grouting plug 14 and pie stop grouting plug 15 are made of high elastic rubber material.
As shown in figure 3, in the annular Grouting Pipe 4 there are two centrosymmetric Grouting Pipe stock inlet 5 and several etc.
The Grouting Pipe grout outlet of spacing, Grouting Pipe stock inlet 5 connect with pressure pipe grout outlet 2, are equipped with only in each Grouting Pipe stock inlet 5
Valve 9 is returned, as shown in Figure 6,7, is equipped with one-way pressure valve 6 in each Grouting Pipe grout outlet.
As shown in Figure 4,5, the one-way pressure valve 6 described in several is equidistantly mounted on Grouting Pipe grout outlet, several
One-way pressure valve 6 is dehisced in arranging clockwise or counter-clockwise, and one-way pressure valve 6 is steel thin slice, and one end of steel thin slice is by adding
Gu stirrup 7 is fixed in annular Grouting Pipe 4, the other end be according to suffered pressure inlet wire opening and closing, by external pressure when
Wait, one-way pressure valve be in closed state, by when internal certain pressure in open configuration.
A kind of post-grouting method increasing perfusion shaft resistance, comprising the following steps:
1) one-way pressure valve 6 is installed on annular Grouting Pipe grout outlet, and is bound securely with thin stirrup 7, one-way pressure valve 6
During construction, opened automatically since internal pressure is greater than external pressure, one-way pressure valve 6 is less than in internal pressure
Be closed automatically when external pressure, can prevent stop slip casting after due to overpressure forfeiture caused by mud flow back, improve
The quantity of construction success rate, annular Grouting Pipe grout outlet is determined that general pile body diameter is bigger by pile body diameter and concrete strength,
Required grout outlet quantity is more；The opening direction of one-way pressure valve 6 is in annular Grouting Pipe 4 in the clockwise or inverse time
Needle is equidistantly arranged；
2) annular Grouting Pipe 4 is installed on the outside of steel reinforcement cage, installs one every 2m or so, clipping room is away from according to practical pile foundation
The needs of bearing capacity and the distribution situation of soil layer can be adjusted, and annular Grouting Pipe 4 is tied up by steel wire and pile body steel reinforcement cage
Fasten solid, floating when preventing casting concrete；
3) two grouting pressure pipes 8 in a manner of centrosymmetric with steel wire lashing on the outside of steel cage, grouting pressure pipe pulp
Mouth 2 is connected with annular Grouting Pipe stock inlet 5 with casing, check-valves 9 is equipped in annular Grouting Pipe stock inlet 5, in annular slip casting
The when opening that pipe 4 has mud injection to generate pressure, when no mud injects, due to the inside of annular Grouting Pipe 4 itself
Pressure and be closed automatically, to prevent the mud in annular Grouting Pipe 4 from flowing back into grouting pressure pipe 8, ensure that slip casting it is unobstructed with
And construction efficiency；From grouting pressure pipe top nozzle injected clear water, its leakproofness is tested；
4) slip casting bar is installed from 8 bottom of grouting pressure pipe, the pulley 13 on slip casting bar is stuck in card slot 3, and connects slip casting
The end of hose 10, slip casting hose 10 is stretched out and is closed from 8 head of grouting pressure pipe, and before hanging steel reinforcement cage, slip casting bar is pre-
8 bottom of grouting pressure pipe is first set, after concreting finishes 12h, can directly pull slip casting bar from bottom to top, is such as schemed
Shown in 8, grouting behind shaft or drift lining construction is carried out；Pulley 13 is connected using spring 17, when slip casting bar passes through grouting pressure pipe necking section 1
Pulley 13 can be squeezed inwardly, and pulley 13 can flick again when slip casting bar passes through 8 common sections of grouting pressure pipe, due to note
Slurry rod seal head 12, which is equipped with, pulley 13 and to be stuck in slot, can to avoid hoisting grouting bar during the vibration that generates cause
The torsion of slip casting hose 10, so as to cause the damage of slip casting hose 10
5) guide-localization casing, drill hole of drilling machine pile are set；
6) steel reinforcement cage is hung, casting concrete simultaneously configures mud；
7) after concreting finishes 12 hours, slip casting hose 10 is connected with grouting pump；
8) slip casting hose 10 is slowly moved up, allows the bowl-shape stop grouting plug 14 and pie stop grouting plug 15 and grouting pressure of slip casting bar
The chamber that 8 necking section 1 of pipe is formed is aligned grouting pressure pipe grout outlet 2；
9) grouting pump extracts mud out out of mud pit, and mud pours into slip casting bar by slip casting hose 10 using high pressure, infuses
Need to be arranged pressure gauge real time monitoring grouting pressure during entering, the depth of general annular Grouting Pipe 4 is deeper, and when slip casting is required
Pressure it is bigger；
10) mud is discharged slip casting bar slurry outlet 16, and pressure is formed in chamber of the mud of discharge described in step 8), and
It is poured into annular Grouting Pipe 4 by the check-valves of grouting pressure pipe grout outlet 2 and annular Grouting Pipe 4；
11) one-way pressure valve 6 in annular Grouting Pipe 4 is opened by the internal pressure that mud generates, and mud passes through list
To pressure valve 6, injection squeezes pile concrete outward, and pile concrete swells outward under the action of spraying mud；
12) pile concrete can be squeezed from the mud that one-way pressure valve 6 sprays, makes concrete outwardly against the soil body, increases
Pressure between stake soil, and under the action of several one-way pressure valve 6 of equidistant arrangement clockwise or counter-clockwise,
So that forming ring structure around pile body, increase the degree of roughness of pile body, to change the coefficient of friction of stake and soil around pile；
13) after mud injection reaches after certain standard, slip casting bar is moved up, and continue slip casting, the stop grouting plug of slip casting bar
Diameter is slightly less than the common section diameter of grouting pressure pipe 8, complete grouting pressure pipe 8 necking section slip casting after, slip casting bar after
Slip casting can be continued by continuing while moving up, mud is downward by the gap between the common section of grouting pressure pipe 8 of stop grouting plug
Injection compensates grouting, guarantees continuous grouting in work progress, improves the working efficiency of entire grouting behind shaft or drift lining system, raising is applied
Working medium amount；11) when slip casting bar reaches next 8 necking section 1 of grouting pressure pipe, step 8) 9) 10) is repeated；
14) after all annular Grouting Pipe (4) slip castings of pile body, continue grouting under pressure from 8 nozzle of grouting pressure pipe, make
It is more closely knit to obtain mud；
(15) after slip casting reaches preassigned, stop slip casting, complete to increase perfusion shaft resistance post grouting process, such as Figure 15
It is shown, for construction after pile body schematic diagram, wherein 18 be bored concrete pile pile body, 19 be the concrete knot that is formed after constructing
Structure.
Claims (6)
1. it is a kind of increase perfusion shaft resistance grouting behind shaft or drift lining system, it is characterised in that: include slip casting hose, grouting pressure pipe and
Annular Grouting Pipe is provided with pressure pipe grout outlet on the grouting pressure pipe, slip casting bar is equipped with inside grouting pressure pipe,
The slip casting hose is connect with the top of slip casting bar, and slip casting bar slurry outlet is provided on slip casting bar, is opened in annular Grouting Pipe
There are Grouting Pipe stock inlet and Grouting Pipe grout outlet, the pressure pipe grout outlet is connected to Grouting Pipe stock inlet, and mud is from slip casting
Hose enters in slip casting bar, enters inside grouting pressure pipe from slip casting bar slurry outlet, then enter ring-shaped pouring from pressure pipe grout outlet
It starches in pipe, final slurry is gone out from Grouting Pipe grout outlet.
2. a kind of grouting behind shaft or drift lining system for increasing perfusion shaft resistance according to claim 1, it is characterised in that: the note
Slurry pressure pipe internal chamber wall is set there are three the axial card slot being centrosymmetric, grouting pressure inside pipe wall every 2m at micro-necking contracting shape,
A pressure pipe grout outlet is equipped at every section of micro-necking contracting shape.
3. a kind of grouting behind shaft or drift lining system for increasing perfusion shaft resistance according to claim 2, it is characterised in that: the note
Slurry bar is made of pulp steel pipe, two closed heads, bowl-shape stop grouting plug and pie stop grouting plug, if being provided on the pulp steel pipe
Dry slip casting bar slurry outlet, two closed heads are separately fixed at pulp steel pipe both ends, pass through respectively in the side of closed head flexible
Spring is connected with three symmetrical pulleys corresponding with three card slots of the grouting pressure inside pipe wall, and pulley is stuck in slip casting
The diameter of sliding in the card slot of pressure pipe, the bowl-shape stop grouting plug and pie stop grouting plug is greater than grouting pressure micro-necking contracting shape Duan Zhi
Diameter and it is less than grouting pressure pipe diameter, after slip casting bar is put into grouting pressure pipe by when slip casting, bowl-shape stop grouting plug and pie are only starched
Plug forms a chamber, the top of the slip casting hose and pulp steel pipe with the inner wall of grouting pressure pipe micro-necking contracting shape section respectively
Connection.
4. a kind of grouting behind shaft or drift lining system for increasing perfusion shaft resistance according to claim 3, it is characterised in that: the envelope
Closing head is the pie being formed from steel, and the pulley is wrapped up with rubber material, the bowl-shape stop grouting plug and pie stop grouting plug
It is made of high elastic rubber material.
5. a kind of grouting behind shaft or drift lining system for increasing perfusion shaft resistance according to claim 3, it is characterised in that: the ring
There are two centrosymmetric Grouting Pipe stock inlet and several equidistant Grouting Pipe grout outlets in shape Grouting Pipe, Grouting Pipe is into slurry
Mouth connects with pressure pipe grout outlet, is equipped with check-valves in each Grouting Pipe stock inlet, is equipped in each Grouting Pipe grout outlet unidirectional
Pressure valve.
6. a kind of grouting behind shaft or drift lining system for increasing perfusion shaft resistance according to claim 5, it is characterised in that: several institutes
The one-way pressure valve stated equidistantly is mounted on Grouting Pipe grout outlet, several one-way pressure valves were dehisced in the clockwise or inverse time
Needle arrangement, one-way pressure valve are steel thin slice, and one end of steel thin slice is fixed in annular Grouting Pipe by reinforcing stirrup, and the other end is
According to suffered pressure inlet wire opening and closing, when by external pressure, one-way pressure valve is in closed state, by internal certain
Open configuration is in when pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820683874.5U CN208395813U (en) | 2018-05-09 | 2018-05-09 | A kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820683874.5U CN208395813U (en) | 2018-05-09 | 2018-05-09 | A kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208395813U true CN208395813U (en) | 2019-01-18 |
Family
ID=65062927
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820683874.5U Expired - Fee Related CN208395813U (en) | 2018-05-09 | 2018-05-09 | A kind of grouting behind shaft or drift lining system increasing perfusion shaft resistance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360510A (en) * | 2018-05-09 | 2018-08-03 | 合肥学院 | A kind of grouting behind shaft or drift lining system and method increasing perfusion shaft resistance |
| CN113309086A (en) * | 2021-06-03 | 2021-08-27 | 湖南源源生态工程集团有限公司 | High-pressure rotary spraying grouting device for hands-free pipe |
| CN114411719A (en) * | 2022-02-15 | 2022-04-29 | 浙江意力管业科技有限公司 | Corrosion-resistant impervious prestressed concrete pipe pile |
-
2018
- 2018-05-09 CN CN201820683874.5U patent/CN208395813U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360510A (en) * | 2018-05-09 | 2018-08-03 | 合肥学院 | A kind of grouting behind shaft or drift lining system and method increasing perfusion shaft resistance |
| CN108360510B (en) * | 2018-05-09 | 2024-04-05 | 合肥学院 | Post grouting system and method for increasing side friction of cast-in-place pile |
| CN113309086A (en) * | 2021-06-03 | 2021-08-27 | 湖南源源生态工程集团有限公司 | High-pressure rotary spraying grouting device for hands-free pipe |
| CN113309086B (en) * | 2021-06-03 | 2023-12-22 | 湖南源源生态工程集团有限公司 | High-pressure jet grouting device for hands-free pipe |
| CN114411719A (en) * | 2022-02-15 | 2022-04-29 | 浙江意力管业科技有限公司 | Corrosion-resistant impervious prestressed concrete pipe pile |
| CN114411719B (en) * | 2022-02-15 | 2023-11-17 | 浙江意力管业科技有限公司 | Corrosion-resistant impervious prestressed concrete pipe pile |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190118 Termination date: 20200509 |