CN107201828B - 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
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- CN107201828B CN107201828B CN201710472293.7A CN201710472293A CN107201828B CN 107201828 B CN107201828 B CN 107201828B CN 201710472293 A CN201710472293 A CN 201710472293A CN 107201828 B CN107201828 B CN 107201828B
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- snorkel
- glue
- uncompacted
- drilling
- path pressure
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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 procedures of prestress hole path pressure grouting, comprising: several drillings are opened up at the crack of prestress hole pipeline outer wall；The snorkel is respectively set in each drilling；The snorkel exposed parts that lowest part is on spatial position are connected with vacuum pump, the gas outlet of vacuum pump is connected with the first container for filling drier self-indicating, snorkel in remaining each drilling is connected by hose with the second container for filling discoloration drier, is emptied the moisture in prestressed pore passage by vacuum pump；At each snorkel install glue-injection base, by glue-injection base of the glue-injecting pump from the snorkel of lowest part successively into prestressed pore passage inject epoxy grouting resin；Until filling epoxy grouting resin by the glue-injection base at the last one snorkel.It is realized using the present invention to the uncompacted reparation of hole path pressure grouting, avoids the corrosion of presstressed reinforcing steel in duct, improve durability and the safety of prestressed structure.
Description
Technical field
The invention belongs to field of engineering technology more particularly to a kind of uncompacted restorative procedures of prestress hole path pressure grouting.
Background technique
Post tensioning structure is common structure type in civil engineering, the quality and compaction rate pair of hole path pressure grouting
The corrosion regularity of steel strand wires influences 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 is met the requirements, 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, operator improves the fluidities of slurries often through the ratio of mud is increased, and this
It will cause slurries bleeding.Water lower than the density of cement 2/3, secretes the eminence that Free water out is gathered in prestressed pore passage.
During its wet curing, part curing water may accumulate in duct prestressed structure, in hole path pressure grouting mistake
One channel mud jacking is used in journey, and does not wait until that the valve of grout outlet is just closed in even slurry outflow, leads to a certain range under anchor
Interior slurry is rich in air and Free water.In anchorage dead astern, in duct only have presstressed reinforcing steel and without grouting material, hereafter one
In hole road, the ratio of mud is distributed from infinity to design value, and has been not excluded for a 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 the fill area 2 that presstressed reinforcing steel and duct gap are mainly filled by air, is presstressed reinforcing steel and hole close to the fill area 2
The fill area 3 that road gap is mainly filled by the grouting material of high water-cement ratio, 3 rear of fill area is only presstressed reinforcing steel and duct gap master
It will be by the fill area 4 of qualified grouting material filling.
Under the conditions of subzero temperature, Free water freezing and expansion causes concrete to crack 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.Once being formed, moisture, oxygen in air will in crack
Presstressed reinforcing steel surface is readily arrived at, accelerates its corrosion, to seriously affect durability and the safety of prestressed structure.
In mechanization relatively advanced today, prestressed structure speed of application is very fast, for example, box beam from it is prefabricated, be lifted into
Post-cast strip pours completion, that is, 3~4 months time.But the above problem has to pass through winter subzero temperature again can just be exposed,
For that must just can not take measures to implement to repair on the spot to hole path pressure grouting for the prestressed structure got off of unloading.And currently,
There has been no corresponding technologies.It can be seen that the existing technology needs further improvement and improves.
Summary of the invention
In view of the serious consequence that above-mentioned existing construction quality lowly causes structure durability to reduce, the present invention provides one kind
The uncompacted restorative procedure of prestress hole path pressure grouting, to ensure durability and the safety of prestressed structure.
The technical scheme adopted by the invention is as follows:
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 inner hole of prestressed pore passage is connected；
Step 2, the inner wall cleaning of each drilling is clean, it is ensured that be free of dust, clast；
Step 3, it selects and is adapted with drilling and snorkel that quantity is equal, one is respectively set in each drilling and described leads to
Tracheae, and each snorkel be installed to drilling in after, each snorkel need to retain certain exposed size；
Step 4, surface-closed is carried out using non-drilled region of the adhesive to prestressed pore passage fracture faces；
Step 5, the snorkel exposed parts that lowest part is on spatial position are connected with vacuum pump, vacuum pump goes out
Port is connected with the first container for filling drier self-indicating, when vacuum pump is opened, in the prestressed pore passage that is connected with vacuum pump
The Free water of bore portion gasifies discharge under the action of negative pressure, and atmosphere is discharged into after the first container；Ventilation in remaining each drilling
Pipe is connected by hose with the second container for filling discoloration drier；
Step 6, when the drier self-indicating in the first container no longer changes colour because of dampness, by vacuum pump and on spatial position
Snorkel at height second from the bottom is connected, and repeats the above steps 5, until the moisture in prestressed pore passage empties；
Step 7, the exposed parts of each snorkel are cut away, glue-injection base is installed at each snorkel later, passes through injecting glue
It pumps from the glue-injection base at the snorkel for being in lowest part on spatial position and injects epoxy grouting resin into prestressed pore passage；
Step 8, after the glue-injection base stayed at the snorkel being at height third from the bottom on spatial position starts plastic emitting,
Stop the glue-injection base injecting glue at the snorkel for being in lowest part on spatial position, then by glue-injecting pump from space bit
It sets the glue-injection base at the snorkel at height second from the bottom and injects epoxy grouting resin into crack；And so on,
Until filling epoxy grouting resin by the glue-injection base at the last one snorkel；
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 ventilation pipe polishes off.
The internal diameter of each drilling is 10~15mm.
The distance between adjacent two described drilling is 20~40cm.
In the step 2, drill hole inner wall is cleared up using to each method for being passed through pressure-air that drills.
In the step 3, snorkel is bonded on drill hole inner wall by using adhesive.
The adhesive is epoxy resin.
Each snorkel is stainless steel tube.
The bottom of each snorkel need to be flush with prestressed pore passage inner wall.
By adopting the above-described technical solution, obtained by the present invention have the beneficial effect that
1, using the present invention, can by using hydrolysis product of cement as the system of cementitious material, by negative pressure by it is extra from
By water discharge, the serious cementitious material bigger than normal of the ratio of mud is then injected into because dehydration cracking is to form connectivity gap at this time
Epoxy resin adhesive fills up the communication gap between solid particle as packing material, realizes to hole path pressure grouting leakiness
Reparation, avoid the corrosion of presstressed reinforcing steel in duct, improve durability and the safety of prestressed structure.
2, present invention is particularly suitable for cause structural concrete to crack along prestressed pore passage to because of the icing of hole path pressure grouting bleeding
The reparation of infiltration.
Detailed description of the invention
Fig. 1 shows a kind of uncompacted structure chart of prestress hole path pressure grouting.
Fig. 2 is that vacuum pump of the present invention makes Free water gasify under the action of negative pressure a kind of status diagram of discharge.
Fig. 3 is prestressed pore passage injecting glue distribution schematic diagram in the present invention.
Specific embodiment
The present invention is described in further detail with specific embodiment with reference to the accompanying drawing, but the present invention is not limited to
These embodiments.
As shown in Figures 2 and 3, the uncompacted restorative procedure of a kind 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 7 outer wall of prestressed pore passage, respectively drills 8
It is connected with the inner hole of prestressed pore passage 7.The internal diameter of each drilling 8 is between 10mm, 12mm, 15mm or 10~15mm
Any number.Any number of the distance between the adjacent two described drilling 8 between 20cm, 30cm, 40cm or 20~40cm.Respectively
The bottom of the drilling 8 need to be flush with 7 inner wall of prestressed pore passage.
Step 2, the inner wall cleaning of each drilling 8 is clean, it is ensured that without dust, clast etc..Using logical 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 by being blown into high pressure sky
The method of gas can also take other measure cleaning drill hole inner walls, as long as ensuring in drilling 8 without dust, clast etc..
Step 3, it selects and is adapted with drilling 8 and snorkel that quantity is equal, each drill is respectively set described in one in 8
Snorkel, and each snorkel be installed to drilling 8 in after, each snorkel need to retain certain exposed size.Each snorkel is equal
For stainless steel tube.And the bottom of each snorkel need to be flush with 7 inner wall of prestressed pore passage.When snorkel is installed, it can pass through
Snorkel is bonded on 8 inner walls of drilling using adhesives such as epoxy resin.
Step 4, surface envelope is carried out using non-drilled region of the adhesives such as epoxy resin to 7 fracture faces of prestressed pore passage
It closes.
Step 5, the snorkel exposed parts that lowest part is on spatial position are connected with vacuum pump 9, vacuum pump 9
Gas outlet is connected with the first container 10 for filling drier self-indicating, when vacuum pump 9 is opened, the prestressing force that is connected with vacuum pump 9
The Free water of 7 bore section of duct gasifies discharge under the action of negative pressure, and is discharged into atmosphere after the first container 10；Remaining respectively drills
Snorkel in 8 is connected by hose with the second container 6 for filling discoloration drier.Second container 6 is connected with ventilation pipe 5
It is logical.
Step 6, when the drier self-indicating in the first container 10 no longer changes colour because of dampness, by vacuum pump 9 and in space bit
It sets the snorkel at the height second from the bottom to be connected, repeats the above steps 5, until the moisture row in prestressed pore passage 7
Only.
Step 7, the exposed parts of each snorkel are cut away, glue-injection base is installed at each snorkel later, passes through injecting glue
Pump 11 injects epoxy grouting tree into prestressed pore passage 7 from the glue-injection base being at the snorkel of lowest part on spatial position
Rouge.The epoxy grouting resin need to select low viscosity, high-intensitive product.
Step 8, after the glue-injection base stayed at the snorkel being at height third from the bottom on spatial position starts plastic emitting,
Stop the glue-injection base injecting glue at the snorkel for being in lowest part on spatial position, then by glue-injecting pump 11 from space
Glue-injection base on position at the snorkel at height second from the bottom injects epoxy grouting resin into crack；With such
It pushes away, until filling epoxy grouting resin by the glue-injection base at the last one snorkel.
Step 9, after epoxy grouting resin solidification and after reaching the intensity of design requirement, by the glue on 7 surface of prestressed pore passage
Glue-injection base at liquid etc. and each ventilation pipe polishes off.
The part that do not address in the present invention uses or uses for reference prior art and can be realized.
Specific embodiment described herein is only to spiritual example explanation of the invention.Belonging to the present invention
Those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitutes, and however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (8)
1. a kind of uncompacted restorative procedure of prestress hole path pressure grouting, which is characterized 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 with answer in advance
The inner hole in power duct is connected；
Step 2, the inner wall cleaning of each drilling is clean, it is ensured that be free of dust, clast；
Step 3, it selects and is adapted and snorkel that quantity is equal with drilling, the ventilation is respectively set in each drilling
Pipe, and each snorkel be installed to drilling in after, each snorkel need to retain exposed size；
Step 4, surface-closed is carried out using non-drilled region of the adhesive to prestressed pore passage fracture faces；
Step 5, the snorkel exposed parts that lowest part is on spatial position are connected with vacuum pump, the gas outlet of vacuum pump
It is connected with the first container for filling drier self-indicating, when vacuum pump is opened, hole portion in the prestressed pore passage that is connected with vacuum pump
Point Free water gasify under the action of negative pressure discharge, and atmosphere is discharged into after the first container；Snorkel in remaining each drilling is logical
It crosses hose and is connected with the second container for filling discoloration drier；
Step 6, when the drier self-indicating in the first container no longer changes colour because of dampness, vacuum pump is in on spatial position
Snorkel at height second from the bottom is connected, and repeats the above steps 5, until the moisture in prestressed pore passage empties；
Step 7, the exposed parts of each snorkel are cut away, later at each snorkel install glue-injection base, by glue-injecting pump from
The glue-injection base at snorkel on spatial position in lowest part injects epoxy grouting resin into prestressed pore passage；
Step 8, after the glue-injection base stayed at the snorkel being at height third from the bottom on spatial position starts plastic emitting, stop
To the glue-injection base injecting glue being on spatial position at the snorkel of lowest part, then by glue-injecting pump from spatial position
Glue-injection base at the snorkel at height second from the bottom injects epoxy grouting resin into crack；And so on, until
Epoxy grouting resin is filled by the glue-injection base at the last one snorkel；
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 ventilation pipe polishes off.
2. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, which is characterized 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, which is characterized in that adjacent two
The distance between described drilling is 20~40cm.
4. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, which is characterized in that the step
In rapid 2, drill hole inner wall is cleared up using to each method for being passed through pressure-air that drills.
5. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, which is characterized in that the step
In rapid 3, snorkel is bonded on drill hole inner wall by using adhesive.
6. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 5, which is characterized 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, which is characterized in that each described
Snorkel is stainless steel tube.
8. the uncompacted restorative procedure of a kind of prestress hole path pressure grouting according to claim 1, which is characterized in that each described
The bottom of snorkel need to be flush with prestressed pore passage inner wall.
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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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| 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 |
| 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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| US4659589A (en) * | 1985-06-21 | 1987-04-21 | Renbec International Corp. | Process for applying a sealing composition |
| US6527849B2 (en) * | 1990-06-19 | 2003-03-04 | Carolyn M. Dry | 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 |
| CN104481560B (en) * | 2014-12-09 | 2017-08-22 | 中煤第一建设有限公司 | Back water-bearing layer administering 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 |
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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. |