CN107201828A - A kind of uncompacted restorative procedure of prestress hole path pressure grouting - Google Patents
A kind of uncompacted restorative procedure of prestress hole path pressure grouting Download PDFInfo
- Publication number
- CN107201828A CN107201828A CN201710472293.7A CN201710472293A CN107201828A CN 107201828 A CN107201828 A CN 107201828A CN 201710472293 A CN201710472293 A CN 201710472293A CN 107201828 A CN107201828 A CN 107201828A
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- China
- Prior art keywords
- breather pipe
- glue
- uncompacted
- drilling
- path pressure
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Abstract
The invention discloses a kind of uncompacted restorative procedure of prestress hole path pressure grouting, including：Several drillings are opened up at the crack of prestress hole pipeline outer wall；A breather pipe is set respectively in each drilling；The breather pipe exposed parts that lowest part is on locus are connected with vavuum pump, the gas outlet of vavuum pump is connected with filling the first container of drier self-indicating, breather pipe in remaining each drilling is by flexible pipe and fills the second container of the drier that changes colour and is connected, by vavuum pump by the moisture emptying in prestressed pore passage；Glue-injection base is installed at each breather pipe, by glue-injection base of the glue-injecting pump at the breather pipe of lowest part epoxy grouting resin is injected into prestressed pore passage successively；Until filling epoxy grouting resin by the glue-injection base at last breather pipe.Repair uncompacted to hole path pressure grouting is realized using the present invention, it is to avoid the corrosion of presstressed reinforcing steel in duct, improve the durability and security of prestressed structure.
Description
Technical field
The invention belongs to field of engineering technology, more particularly to a kind of uncompacted restorative procedure of prestress hole path pressure grouting.
Background technology
Post tensioning structure is the structure type commonly used in civil engineering, the quality and compaction rate pair of hole path pressure grouting
The corrosion regularity influence of steel strand wires is very big under high-stress state.The ratio of mud is low, good fluidity, ungauged regions, and no bleeding etc. is all high
The necessary condition of quality mud jacking.It is that mud jacking is closely knit in guarantee duct that the quality of circulation mud jacking and grout outlet slurry, which meets and required, has
Efficacious prescriptions method.
Some grouting material qualities are unqualified, under low water-cement ratio (0.26~0.28), are unsatisfactory for the fluidity requirement of specification
(10~17s), during specific mud jacking, operating personnel improve the fluidity of slurries often through the increase ratio of mud, and this
Slurries bleeding will be caused.Water is lower than the density of cement by 2/3, secretes the eminence that the Free water is gathered in prestressed pore passage.
Prestressed structure is during its wet curing, and part curing water may be accumulated in duct, in hole path pressure grouting mistake
One channel mud jacking is employed in journey, and does not wait until that the valve of grout outlet is just closed in even slurry outflow, causes certain limit under anchor
Interior slurry is rich in air and Free water.In anchorage dead astern, duct only have presstressed reinforcing steel and without grouting material, thereafter one
In sector hole road, the ratio of mud is distributed from infinity to design load, and has been not excluded for a sector hole road and there was only water and without grouting material.Such as
Shown in Fig. 1 of Figure of description, the figure shows a kind of uncompacted structure chart of prestress hole path pressure grouting, anchorage 1 in the figure
Dead astern is presstressed reinforcing steel and the main fill area 2 filled by air in duct gap, is presstressed reinforcing steel and hole close to the fill area 2
The fill area 3 that the main grouting material by high water-cement ratio in road gap is filled, the rear of fill area 3 is only presstressed reinforcing steel and duct gap master
The fill area 4 to be filled by qualified grouting material.
Under the conditions of subzero temperature, Free water freezing and expansion causes concrete to be ftractureed along duct direction, and environment temperature rises to positive temperature
When, ice-out Cheng Shui is oozed out by the crack on prestress hole pipeline outer wall, and carries the calcium hydroxide in grouting material to structure
Surface, meets the carbon dioxide in air and generates white calcium carbonate.Crack is once form, and the moisture, oxygen in air will
Presstressed reinforcing steel surface readily is arrived at, accelerates it to corrode, so as to have a strong impact on the durability and security of prestressed structure.
In mechanization relatively advanced today, prestressed structure speed of application is very fast, such as box beam from it is prefabricated, be lifted into
Post-cast strip pours completion, that is, time of 3~4 months.But above mentioned problem, which has to pass through winter subzero temperature, can just be exposed again,
For that must just can not take measures that hole path pressure grouting is implemented to repair on the spot for the prestressed structure got off of unloading.And it is current,
Not yet there is corresponding technology.As can be seen here, prior art awaits further improving.
The content of the invention
In view of above-mentioned existing construction quality lowly causes the serious consequence that structure durability is reduced, the invention provides one kind
The uncompacted restorative procedure of prestress hole path pressure grouting, to ensure the durability and security of prestressed structure.
The technical solution adopted in the present invention is：
A kind of uncompacted restorative procedure of prestress hole path pressure grouting, this method comprises the following steps：
Step 1, several drillings are opened up along fracture length direction at the crack of prestress hole pipeline outer wall, each drilling with
The endoporus of prestressed pore passage is connected；
Step 2, it is the inner wall cleaning of each drilling is clean, it is ensured that without dust, chip；
Step 3, from the breather pipe being adapted with drilling and quantity is equal, setting one is described logical respectively in each drilling
Tracheae, and each breather pipe be installed to drilling in after, each breather pipe need to retain certain exposed size；
Step 4, surface-closed is carried out to the non-drilled region of prestressed pore passage fracture faces using adhesive；
Step 5, it will be connected on locus in the breather pipe exposed parts of lowest part with vavuum pump, vavuum pump goes out
Gas port is connected with filling the first container of drier self-indicating, when vavuum pump is opened, in the prestressed pore passage being connected with vavuum pump
The Free water of bore portion gasifies discharge under suction function, and is discharged into air after the first container；Ventilation in remaining each drilling
Pipe is connected by flexible pipe with filling the second container of discoloration drier；
Step 6, when the drier self-indicating in the first container no longer changes colour because making moist, by vavuum pump and on locus
Breather pipe at height second from the bottom is connected, and repeat the above steps 5, the moisture emptying in prestressed pore passage；
Step 7, the exposed parts of each breather pipe are cut away, glue-injection base is installed at each breather pipe afterwards, passes through injecting glue
Pump injects epoxy grouting resin into prestressed pore passage from the glue-injection base on locus at the breather pipe in lowest part；
Step 8, the glue-injection base on locus at the breather pipe at height third from the bottom is stayed in start after plastic emitting,
Stop to the glue-injection base injecting glue on locus at the breather pipe in lowest part, then by glue-injecting pump from space bit
Put the glue-injection base at the breather pipe at height second from the bottom and epoxy grouting resin is injected into crack；By that analogy,
Until filling epoxy grouting resin by the glue-injection base at last breather pipe；
Step 9, after epoxy grouting resin solidification and after reaching the intensity of design requirement, by the glue on prestressed pore passage surface
And the glue-injection base at each breather line is polished off.
The internal diameter of each drilling is 10~15mm.
The distance between drilling described in adjacent two is 20~40cm.
In the step 2, the method cleaning drill hole inner wall of pressure-air is passed through using to each drill.
In the step 3, breather pipe is bonded on drill hole inner wall by using adhesive.
The adhesive is epoxy resin.
Each breather pipe is stainless steel tube.
The bottom of each breather pipe need to be flush with prestressed pore passage inwall.
By adopting the above-described technical solution, having the beneficial effect that acquired by the present invention：
1st, using the present invention, can by the system using hydrolysis product of cement as binder materials, by negative pressure by it is unnecessary from
By water discharge, now the serious binder materials bigger than normal of the ratio of mud ftractures so as to form connectivity gap because of dehydration, is then injected into
Epoxy resin adhesive is as packing material, and the communication gap filled up between solid particle is realized to hole path pressure grouting leakiness
Reparation, it is to avoid the corrosion of presstressed reinforcing steel in duct, improve the durability and security of prestressed structure.
2nd, present invention is particularly suitable for causing structural concrete to be ftractureed along prestressed pore passage because hole path pressure grouting bleeding freezes
The reparation of infiltration.
Brief description of the drawings
Fig. 1 shows a kind of uncompacted structure chart of prestress hole path pressure grouting.
Fig. 2 is that vavuum pump of the present invention makes Free water gasify under suction function a kind of view of discharge.
Fig. 3 is prestressed pore passage injecting glue distribution schematic diagram in the present invention.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but the present invention is not limited to
These embodiments.
As shown in Figures 2 and 3, a kind of uncompacted restorative procedure of prestress hole path pressure grouting, this method comprises the following steps：
Step 1, several drillings 8 are opened up along fracture length direction at the crack of the outer wall of prestressed pore passage 7, respectively drills 8
Endoporus with prestressed pore passage 7 is connected.The internal diameter of each drilling 8 is between 10mm, 12mm, 15mm or 10~15mm
Any number.Drilling the distance between 8 described in adjacent two is any number between 20cm, 30cm, 40cm or 20~40cm.Respectively
The bottom of the drilling 8 need to be flush with the inwall of prestressed pore passage 7.
Step 2, it is the inner wall cleaning of each drilling 8 is clean, it is ensured that without dust, chip etc..Lead to using to each drilling 8
Enter the method cleaning drill hole inner wall of pressure-air.Certainly, the method for cleaning drilling 8 is not limited only to empty by being blown into high pressure
The method of gas, can also take other measure cleaning drill hole inner walls, as long as ensuring in drilling 8 without dust, chip etc..
Step 3, from the breather pipe being adapted with drilling 8 and quantity is equal, set respectively described in one in each drilling 8
Breather pipe, and each breather pipe be installed to drilling 8 in after, each breather pipe need to retain certain exposed size.Each breather pipe is equal
For stainless steel tube.And the bottom of each breather pipe need to be flush with the inwall of prestressed pore passage 7.When breather pipe is installed, it can pass through
Breather pipe is bonded on 8 inwalls of drilling using adhesives such as epoxy resin.
Step 4, surface envelope is carried out to the non-drilled region of the fracture faces of prestressed pore passage 7 using adhesives such as epoxy resin
Close.
Step 5, the breather pipe exposed parts that lowest part is on locus are connected with vavuum pump 9, vavuum pump 9
Gas outlet is connected with filling the first container 10 of drier self-indicating, when vavuum pump 9 is opened, the prestressing force being connected with vavuum pump 9
The Free water of the bore section of duct 7 gasifies discharge under suction function, and is discharged into air after the first container 10；Remaining respectively drills
Breather pipe in 8 is connected by flexible pipe with filling the second container 6 of discoloration drier.Second container 6 is connected with breather line 5
It is logical.
Step 6, when the drier self-indicating in the first container 10 no longer changes colour because making moist, by vavuum pump 9 and in space bit
Put the breather pipe at the height second from the bottom to be connected, repeat the above steps 5, until the moisture row in prestressed pore passage 7
Only.
Step 7, the exposed parts of each breather pipe are cut away, glue-injection base is installed at each breather pipe afterwards, passes through injecting glue
Pump 11 injects epoxy grouting tree into prestressed pore passage 7 from the glue-injection base on locus at the breather pipe in lowest part
Fat.The epoxy grouting resin need to select low viscosity, the product of high intensity.
Step 8, the glue-injection base on locus at the breather pipe at height third from the bottom is stayed in start after plastic emitting,
Stop to the glue-injection base injecting glue on locus at the breather pipe in lowest part, then by glue-injecting pump 11 from space
Glue-injection base on position at the breather pipe at height second from the bottom injects epoxy grouting resin into crack；With such
Push away, until filling epoxy grouting resin by the glue-injection base at last breather pipe.
Step 9, after epoxy grouting resin solidification and after reaching the intensity of design requirement, by the glue on the surface of prestressed pore passage 7
Glue-injection base at liquid etc. and each breather line is polished off.
The part do not addressed in the present invention uses or used for reference prior art and can be achieved.
Specific embodiment described herein is only the spiritual example explanation to the present invention.Belonging to of the invention
Those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode is substituted, but without departing from the spiritual of the present invention or surmounts scope defined in appended claims.
Claims (8)
1. a kind of uncompacted restorative procedure of prestress hole path pressure grouting, it is characterised in that this method comprises the following steps：
Step 1, several drillings are opened up along fracture length direction at the crack of prestress hole pipeline outer wall, each drilling is with advance should
The endoporus in power duct is connected；
Step 2, it is the inner wall cleaning of each drilling is clean, it is ensured that without dust, chip；
Step 3, from the breather pipe being adapted with drilling and quantity is equal, a ventilation is set respectively in each drilling
Pipe, and each breather pipe be installed to drilling in after, each breather pipe need to retain certain exposed size；
Step 4, surface-closed is carried out to the non-drilled region of prestressed pore passage fracture faces using adhesive；
Step 5, the breather pipe exposed parts that lowest part is on locus are connected with vavuum pump, the gas outlet of vavuum pump
It is connected with the first container for filling drier self-indicating, when vavuum pump is opened, hole portion in the prestressed pore passage being connected with vavuum pump
Point Free water gasify under suction function discharge, and be discharged into air after the first container；Breather pipe in remaining each drilling leads to
Cross flexible pipe and be connected with filling the second container of discoloration drier；
Step 6, when the drier self-indicating in the first container no longer changes colour because making moist, by vavuum pump with being on locus
Breather pipe at height second from the bottom is connected, and repeat the above steps 5, the moisture emptying in prestressed pore passage；
Step 7, the exposed parts of each breather pipe are cut away, afterwards at each breather pipe install glue-injection base, by glue-injecting pump from
Glue-injection base on locus at the breather pipe in lowest part injects epoxy grouting resin into prestressed pore passage；
Step 8, stay in the glue-injection base on locus at the breather pipe at height third from the bottom to start after plastic emitting, stop
To the glue-injection base injecting glue on locus at the breather pipe in lowest part, then by glue-injecting pump from locus
Glue-injection base at the breather pipe at height second from the bottom injects epoxy grouting resin into crack；By that analogy, until
Epoxy grouting resin is filled by the glue-injection base at last breather pipe；
Step 9, after epoxy grouting resin solidification and after reaching the intensity of design requirement, by the glue on prestressed pore passage surface and
Glue-injection base at each breather line is polished off.
2. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, it is characterised in that each described
The internal diameter of drilling is 10~15mm.
3. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, it is characterised in that adjacent two
The distance between described drilling is 20~40cm.
4. a kind of uncompacted restorative procedure of prestress hole path pressure grouting according to claim 1, it is characterised in that the step
In rapid 2, the method cleaning drill hole inner wall of pressure-air is passed through using to each drill.
5. a kind of uncompacted restorative procedure of prestress hole path pressure grouting according to claim 1, it is characterised in that the step
In rapid 3, breather pipe is bonded on drill hole inner wall by using adhesive.
6. a kind of uncompacted restorative procedure of prestress hole path pressure grouting according to claim 5, it is characterised in that the glue
Glutinous agent is epoxy resin.
7. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, it is characterised in that each described
Breather pipe is stainless steel tube.
8. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, it is characterised in that each described
The bottom of breather pipe need to be flush with prestressed pore passage inwall.
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| CN201710472293.7A CN107201828B (en) | 2017-06-21 | 2017-06-21 | A kind of uncompacted restorative procedure of prestress hole path pressure grouting |
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| CN201710472293.7A CN107201828B (en) | 2017-06-21 | 2017-06-21 | A kind of uncompacted restorative procedure of prestress hole path pressure grouting |
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| CN107201828B CN107201828B (en) | 2019-07-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795072A (en) * | 2017-11-28 | 2018-03-13 | 北京市地铁运营有限公司地铁运营技术研发中心 | Reinforcement type subway prestressing force beam body and manufacture method |
| CN108344799A (en) * | 2017-12-09 | 2018-07-31 | 菏泽城建工程发展集团有限公司 | A kind of detection method for bridge prestress pore channel slip casting plumpness |
| CN109928013A (en) * | 2017-12-15 | 2019-06-25 | 楚天科技股份有限公司 | A kind of sample bottle production method of leak tester |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0206707A1 (en) * | 1985-06-21 | 1986-12-30 | Rene Jiminez | Sealant composition |
| US20080058445A1 (en) * | 1990-06-19 | 2008-03-06 | Dry Carolyn M | Self-Repairing, Reinforced Matrix Materials |
| CN103195468A (en) * | 2013-04-02 | 2013-07-10 | 重庆市能源投资集团科技有限责任公司 | System process for conducting efficient strengthened extraction in surrounding rock |
| CN104481560A (en) * | 2014-12-09 | 2015-04-01 | 中煤第一建设有限公司 | Roadway roof aquifer treatment method |
| CN204570685U (en) * | 2015-02-26 | 2015-08-19 | 北京公联信达智能交通技术有限责任公司 | Repair the mud jacking formula anchor pole of U-shaped abutment longitudinal cracking |
-
2017
- 2017-06-21 CN CN201710472293.7A patent/CN107201828B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0206707A1 (en) * | 1985-06-21 | 1986-12-30 | Rene Jiminez | Sealant composition |
| US20080058445A1 (en) * | 1990-06-19 | 2008-03-06 | Dry Carolyn M | Self-Repairing, Reinforced Matrix Materials |
| CN103195468A (en) * | 2013-04-02 | 2013-07-10 | 重庆市能源投资集团科技有限责任公司 | System process for conducting efficient strengthened extraction in surrounding rock |
| CN104481560A (en) * | 2014-12-09 | 2015-04-01 | 中煤第一建设有限公司 | Roadway roof aquifer treatment method |
| CN204570685U (en) * | 2015-02-26 | 2015-08-19 | 北京公联信达智能交通技术有限责任公司 | Repair the mud jacking formula anchor pole of U-shaped abutment longitudinal cracking |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795072A (en) * | 2017-11-28 | 2018-03-13 | 北京市地铁运营有限公司地铁运营技术研发中心 | Reinforcement type subway prestressing force beam body and manufacture method |
| CN108344799A (en) * | 2017-12-09 | 2018-07-31 | 菏泽城建工程发展集团有限公司 | A kind of detection method for bridge prestress pore channel slip casting plumpness |
| CN109928013A (en) * | 2017-12-15 | 2019-06-25 | 楚天科技股份有限公司 | A kind of sample bottle production method of leak tester |
| CN109928013B (en) * | 2017-12-15 | 2023-11-28 | 楚天科技股份有限公司 | Sample bottle manufacturing method of leak detector |
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| Publication number | Publication date |
|---|---|
| CN107201828B (en) | 2019-07-19 |
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Effective date of registration: 20190626 Address after: 100012 No. 18 Laiguangying West Road, Chaoyang District, Beijing Applicant after: Engineering Co., Ltd of middle friendship three public office first Applicant after: Qingdao Linchuan Engineering Technology Consulting Co., Ltd. Applicant after: Gansu Changda Highway Co., Ltd. Address before: 266500 Jinshatan Road, Qingdao economic and Technological Development Zone, Shandong 182 Applicant before: Qingdao Linchuan Engineering Technology Consulting Co., Ltd. |
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Effective date of registration: 20200601 Address after: 100012 Beijing City, Chaoyang District, No. 18 West Road Co-patentee after: QINGDAO LINCHUAN ENGINEERING TECHNOLOGY CONSULTING Co.,Ltd. Patentee after: THE FRIST ENGINEERING CO., LTD. OF THE CCCC THIRD HIGHWAY ENGINEERING Co.,Ltd. Co-patentee after: GANSU CHANGDA HIGHWAY Co.,Ltd. Co-patentee after: SHANDONG HIGHWAY & BRIDGE CONSTRUCTION Co.,Ltd. Address before: 100012 Beijing City, Chaoyang District, No. 18 West Road Co-patentee before: QINGDAO LINCHUAN ENGINEERING TECHNOLOGY CONSULTING Co.,Ltd. Patentee before: THE FRIST ENGINEERING CO., LTD. OF THE CCCC THIRD HIGHWAY ENGINEERING Co.,Ltd. Co-patentee before: GANSU CHANGDA HIGHWAY Co.,Ltd. |
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