CN103031809A - Prestress hole channel grouting quality control method based on double parameters of flow and density - Google Patents
Prestress hole channel grouting quality control method based on double parameters of flow and density Download PDFInfo
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- CN103031809A CN103031809A CN2011102910101A CN201110291010A CN103031809A CN 103031809 A CN103031809 A CN 103031809A CN 2011102910101 A CN2011102910101 A CN 2011102910101A CN 201110291010 A CN201110291010 A CN 201110291010A CN 103031809 A CN103031809 A CN 103031809A
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Abstract
The invention discloses a prestress hole channel grouting quality control method based on double parameters of flow and density. The prestress hole channel grouting quality control method judges screen grout pressure maintaining time tk by detecting the flow of an inlet end and an outlet end and water cement ratio density, and then bridge girder prestress hole channel grouting construction is controlled. The prestress hole channel grouting quality control method can control bridge girder prestress hole channel grouting construction quality, guarantees the grouting quality, and effectively resolves the problem that the grouting quality can not be guaranteed under the condition of manual grouting in the prior art. The screen grout pressure maintaining starting time tk is judged whether the tk meets the following two requirement: firstly, a measured flow QA of a flow meter at a grout inlet end A is close to a measured flow QB of a flow meter at a grout outlet end B, the difference value between the QA and the QB is (QA-QB), the average value between the QA and the QB is (QA+QB)/2, and the percentage value between the (QA-QB) and the (QA+QB)/2 is smaller than or equal to a positive or negative permissible error value delta; and the secondly, the water cement ratio density detected by a density transmitter at the grout outlet end B meets the grouting technological requirements.
Description
Technical field
The present invention relates to the bridge prestress pore channel mortar depositing construction, specially refer to a kind of bridge prestress pore channel grouting quality control method.
Background technology
Prior art bridge prestress pore channel mortar depositing construction is to rely on the on-site construction operations personnel with visually observing, manual operations, enter the slip casting of end operation mudjack in the slip casting duct, say end at injected hole and close angle valve screen slurry, purely rely on constructing operation standard, sense of responsibility and professional personal integrity to control construction quality, therefore be difficult to guarantee construction quality, mud jacking leakiness situation appears easily, hole occurs, excreting water phenomenon causes engineering to have hidden danger.Although there are indivedual engineerings in the prestressed pore passage mortar depositing construction, to adopt the slip casting recorder also can only on-the-spot passive record slip casting situation, can not control the mortar depositing construction quality, therefore still can not effectively solve the problems referred to above that exist in the prestressed pore passage mortar depositing construction.
Summary of the invention
The object of the invention is to overcome the above-mentioned drawback that exists in the prior art bridge prestress pore channel mortar depositing construction, and a kind of grouting quality control method that can guarantee construction quality is provided.
The technical solution that the present invention proposes is: based on flow and density biparametric bridge prestress pore channel grouting quality control method, the method is to advance slurry end A end in prestressing force slip casting duct flow, pressure transmitter are set, slurry output end B end arranges flow, pressure and density transmitter, by judging the screen slurry pressurize t zero hour
k, ensure the prestressed pore passage grouting quality, judge the screen slurry pressurize t zero hour
kTo satisfy simultaneously two conditions:
1. advance the measuring flow Q of slurry end A end flow meter
AMeasuring flow Q close to slurry output end B end flow meter
B, both difference (Q
A-Q
B) with both average (Q
A+ Q
BThe percent value of)/2 is less than or equal to positive and negative allowable error value δ;
2. the water/binder ratio density that detects of slurry output end B end density transmitter reaches the grouting process requirement;
At the slip casting t zero hour
p, start and advance slurry end A side pressure stock pump, beginning slip casting;
At the screen slurry pressurize t zero hour
k, close slurry output end B end motor operated valve;
Stop constantly t in the pressurize of screen slurry
0, close into slurry end A side pressure stock pump.
Advantage of the present invention is:
1. by flow and the density parameter of on-the-spot the real time measure grouting process, control grouting quality, determine that exactly the slip casting pressurize constantly, guarantees grouting quality with this.
2. the judgement screen that is used for described in the invention is starched pressurize method strong operability constantly, easily realization.
3. the present invention adopts flow, pressure, density sensor as measuring transducer, has certainty of measurement height, strong interference immunity, not affected by operating mode and artificial disturbance.
4. the present invention is not only applicable to bridge prestress pore channel slip casting, but also can be used for other mortar depositing construction occasions.
Description of drawings
Fig. 1 is mortar depositing construction schematic diagram of the present invention.
Fig. 2 is slip casting of the present invention and screen slurry pressurize Construction State sequential chart.
Fig. 3 is slip casting console structure chart of the present invention.
Fig. 4 is the observing and controlling box structure figure that advances to starch of the present invention.
Fig. 5 is pulp observing and controlling box structure figure of the present invention.
The specific embodiment
The present invention further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:
Bridge prestress pore channel mortar depositing construction schematic diagram referring to 1 one kinds in accompanying drawing based on flow and density biparametric bridge prestress pore channel grouting quality control method, the method is to advance slurry end A end in prestressing force slip casting duct flow, pressure transmitter are set, slurry output end B end arranges flow, pressure and density transmitter, by judging the screen slurry pressurize t zero hour
k, ensure the prestressed pore passage grouting quality.
Bridge prestress pore channel slip casting and screen slurry pressurize Construction State sequential chart, referring to accompanying drawing 2, t among the figure
pBe slip casting zero hour, open slurry end A side pressure stock pump this moment, t
kBe the screen slurry pressurize moment, this closes slurry output end B end motor operated valve, t constantly
pTo t
kTime period constantly is the slip casting time T
0, i.e. T
0=t
k-t
pt
0For the pressurize of screen slurry stops constantly, this closes constantly into slurry end A side pressure stock pump.t
kTo t
0Time period constantly is screen slurry dwell time T
1, namely screen is starched dwell time T
1=t
0-t
k, screen slurry dwell time T
1Job specfication by concrete bridge engineering is determined.
The pressurize of screen slurry is t constantly
kThe factor that the mortar depositing construction quality is had significant impact in the bridge prestress pore channel mortar depositing construction, prior art are to determine by rule of thumb constantly t of screen slurry pressurize by the concentration that manually visually observes cement paste
k, therefore being subjected to interference from human factor and error is very large, grouting quality is difficult to guarantee; The inventive method is to provide to judge constantly t of screen slurry pressurize to this solution plan
kThe condition that satisfies simultaneously of two needs:
1. advance the measuring flow Q of slurry end A end flow meter
AMeasuring flow Q close to slurry output end B end flow meter
B, both difference (Q
A-Q
B) with both average (Q
A+ Q
BThe percent value of)/2 is less than or equal to positive and negative allowable error value δ;
2. the water/binder ratio density that detects of slurry output end B end density transmitter reaches the grouting process requirement.
Detect constantly t
kAfter, mortar depositing construction is controlled by the present invention in this moment, carry out relevant mortar depositing construction and screen slurry pressurize operation, guarantee bridge duct mortar depositing construction quality with this, allowable error value δ is positive and negative 5/1000ths in this example.
The inventive method is to realize that by a kind of bridge prestress pore channel intelligence slip casting controller this controller includes mudjack, its feature by the slip casting console, advance to starch the observing and controlling case, pulp observing and controlling case three parts form.Slip casting console structure forms referring to accompanying drawing 3, it is electrically connected respectively notebook computer 2, mobile communication module 3, wireless communication module 4,485 data acquisition control ports 5, mini-printer 6, USB interface 7, SD card memory cell 8, debug serial port 9 by embedded main board 1, and above-mentioned device is by multi-channel switch power 10 power supplies.Its embedded main board 1 adopts the S3C2440A of Samsung embedded chip, notebook computer 2 adopts the G460 of association type notebook computer, mobile communication module 3 adopts the EM310 of Huawei Company type GPRS communication module, and wireless communication module 4 adopts Wuhan Feng He science and technology 433MHZ wireless transmission module.Advance to starch the observing and controlling box structure and form referring to accompanying drawing 4, it divides three the tunnel to be electrically connected by control panel MCU11: the one tunnel is electrically connected with wireless communication module 13,485 data acquisition control port ones 4 respectively via photoelectricity isolated location 12; Another road via photoelectricity isolated location 15, auxiliary reclay 16, contactor 17, is electrically connected to mudjack 18 successively; Third Road is successively via being electrically connected with flow transmitter 21, pressure transmitter 22 respectively behind AD converting unit 19, the photoelectricity isolated location 20 again.Pulp observing and controlling box structure forms referring to accompanying drawing 5, and it divides three the tunnel to be electrically connected by control panel MCU23: the one tunnel is electrically connected with wireless communication module 25,485 data acquisition control ports 26 respectively via photoelectricity isolated location 24; Another road via photoelectricity isolated location 27, auxiliary reclay 28, contactor 29, is electrically connected to motor operated valve 30 successively; Third Road is successively via being electrically connected with flow transmitter 33, pressure transmitter 34 and density transmitter 35 respectively behind AD converting unit 31, the photoelectricity isolated location 32 again.Wherein, control panel MCU11 and 23 all adopts the AT89S52 single-chip microcomputer, photoelectricity isolated location 12,15,20,24,27,32 all adopt TLP521-4 type photoelectric isolated chip, AD converting unit 19 and 31 adopts the MAX197 chip of MAXIN company, flow transmitter 21 and 33 all adopts the one-piece type electromagnetic flowmeter of JDK300 of Shanghai Ou Jie instrument and meter Co., Ltd, pressure transmitter 22 and the 34 PRC908 type pressure transmitters for Hangzhou profit occasion Science and Technology Ltd., motor operated valve 30 is the ZAJQ-16P type high speed electric valve of the good pump valve of Shanghai Han that company, density transmitter 35 is the great HX1602 type density transmitter of rising scientific and technological wired company in Chengdu, and mudjack 18 is the HB type piston type mudjack that great achievement building machinery Co., Ltd produces.
Operating principle of the present invention is:
By advance slurry end A end in the slip casting duct flow, pressure transmitter are set, slurry output end B end arranges flow, pressure and density transmitter, detect in real time flow rate of grouting, pressure and density signal, and in time pass to the slip casting console, simultaneously the application software with the inventive method is implanted in the SD card memory cell 8, the slip casting console by the inventive method by the pressurize of calculative determination screen slurry constantly.
The embedded main board 1 of slip casting console by wireless communication module 4 or 485 data acquisition control ports 5 with the slip casting situ flow transmitter 21 and 33 that receives, pressure transmitter 22 and 34 and after the signal of density transmitter 35 processes through data-signal, by flow transmitter 21 and 33 and the signal that provides of density transmitter 35 in initialize program, determine constantly t of screen slurry pressurize
k, realize accordingly the operation advance to starch side pressure stock pump and slurry output end motor operated valve, finish the mortar depositing construction quality control.
The data message that on the notebook computer 2 of slip casting console, can show mortar depositing construction, and by mini-printer 6 printings, also can be sent to remote monitoring center via mobile communication module 3.Simultaneously, the slip casting console can also send control command to the site measuring and control case by wireless communication module 4 or 485 data acquisition control ports 5, and control mudjack 18 and motor operated valve 30 actions realize the control of prestressed pore passage slip casting procedure quality.
Advance the flow transmitter 21 of slurry end observing and controlling case, 4～20ma analog signal that pressure transmitter 22 provides, through photoelectricity isolated location 20 and AD converting unit 19, convert data signal to, deliver to control panel MCU11, via photoelectricity isolated location 12, be sent to the slip casting console by 485 data acquisition control port ones 4 or wireless communication module 13 again.Simultaneously, control panel MCU11 can also accept the order of slip casting console, and through photoelectricity isolated location 15, auxiliary reclay 16, contactor 17 actions, control mudjack 18 begins and stop action.
4～20ma analog signal that the flow transmitter 33 of slurry output end observing and controlling case, pressure transmitter 34, density transmitter 35 provide, through photoelectricity isolated location 32 and AD converting unit 31, convert data signal to, deliver to control panel MCU23, via photoelectricity isolated location 24, be sent to the slip casting console by 485 data acquisition control ports 26 or wireless communication module 25 again.Simultaneously, control panel MCU23 can also accept the order of slip casting console, through photoelectricity isolated location 27, auxiliary reclay 28, contactor 29, finally controls motor operated valve 30 actions.
Like this, the present invention is by controlling bridge prestress pore channel mortar depositing construction quality, the mortar depositing construction quality assurance is provided, solves the difficult problem that prior art bridge prestress pore channel mortar depositing construction quality can't guarantee, device described in the invention is modularization integrated morphology simultaneously, device volume is little, on-the-spot simple installation, adaptive capacity to environment is strong, saves manpower, improve work efficiency, of many uses.
Claims (1)
1. based on flow and density biparametric bridge prestress pore channel grouting quality control method, the method feature is to advance slurry end A end in prestressing force slip casting duct flow, pressure transmitter are set, slurry output end B end arranges flow, pressure and density transmitter, by judging the screen slurry pressurize t zero hour
k, ensure the prestressed pore passage grouting quality, judge the screen slurry pressurize t zero hour
kTo satisfy simultaneously two conditions:
1. advance the measuring flow Q of slurry end A end flow meter
AMeasuring flow Q close to slurry output end B end flow meter
B, both difference (Q
A-Q
B) with both average (Q
A+ Q
BThe percent value of)/2 is less than or equal to positive and negative allowable error value δ;
2. the water/binder ratio density that detects of slurry output end B end density transmitter reaches the grouting process requirement;
At the slip casting t zero hour
p, start and advance slurry end A side pressure stock pump, beginning slip casting;
At the screen slurry pressurize t zero hour
k, close slurry output end B end motor operated valve;
Stop constantly t in the pressurize of screen slurry
0, close into slurry end A side pressure stock pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102910101A CN103031809A (en) | 2011-09-29 | 2011-09-29 | Prestress hole channel grouting quality control method based on double parameters of flow and density |
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|---|---|---|---|
| CN2011102910101A CN103031809A (en) | 2011-09-29 | 2011-09-29 | Prestress hole channel grouting quality control method based on double parameters of flow and density |
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| CN103031809A true CN103031809A (en) | 2013-04-10 |
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| CN2011102910101A Pending CN103031809A (en) | 2011-09-29 | 2011-09-29 | Prestress hole channel grouting quality control method based on double parameters of flow and density |
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Cited By (2)
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| CN116223782A (en) * | 2023-05-09 | 2023-06-06 | 广州市市政工程试验检测有限公司 | Device and method for detecting grouting quality of pore canal |
| CN117188469A (en) * | 2023-11-06 | 2023-12-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Constant-flow grouting control method for cement-soil mixing pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117188469A (en) * | 2023-11-06 | 2023-12-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Constant-flow grouting control method for cement-soil mixing pile |
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Addressee: Li Yuejun Document name: Notification that Application Deemed to be Withdrawn |
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Application publication date: 20130410 |