CN1687732A - Equipment and method for testing watertightness of box culvert in large size - Google Patents
Equipment and method for testing watertightness of box culvert in large size Download PDFInfo
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- CN1687732A CN1687732A CN 200510025722 CN200510025722A CN1687732A CN 1687732 A CN1687732 A CN 1687732A CN 200510025722 CN200510025722 CN 200510025722 CN 200510025722 A CN200510025722 A CN 200510025722A CN 1687732 A CN1687732 A CN 1687732A
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- box culvert
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Abstract
The invention discloses a large-scale water seal testing equipment and the method. The equipment comprises the pressure-adding system, the sealing system, the water filling system, the supporting system and the measuring system. The said sealing system comprises the ring sealed slot frame forming the sealing chamber with the box joint and the sealing belt. The said sealed slot frame is fixed on the supporting system. The said sealing belt is on the end of the sealed slot frame. The said pressure-adding system and the water filling system separately connect the sealed chamber. The invention forms the independent sealed chamber at the joint of the box to implement the seal testing in single-hole clearance method, which overcomes the failures of the traditional method. The whole testing equipment is simple and fast.
Description
Technical field
The present invention relates to a kind of watertightness checkout equipment and method, specifically a kind ofly can and use this checkout equipment and carry out the method that the box culvert watertightness detects the equipment that detects watertightness of the box culvert in large size of carrying sewage.
Background technology
Watertightness is a very important index for the pipeline of carrying sewage, and carry the box culvert of sewage for this engineering, because its plane distribution is wide, total length is about 4km, varying aperture is many, and the box culvert headroom of conclude has: four kinds of 4.25m * 3.5m, 1.6m * 1.6m, 2.0m * 2.8m and 3.2m * 2.8m.
Structure in general see for details following table (unit: mm):
| Pattern | Base plate is thick | Top board | Wallboard | Inboard chamfering |
| ??4250×3500 | ??450 | ??450 | ??450 | ??300×300 |
| ??2800×2000 | ??400 | ??400 | ??400 | ??200×200 |
| ??3200×2800 | ??350 | ??350 | ??350 | ??250×250 |
According to " engineering construction of municipal drainage pipeline and control of acceptance " (DBJ08-220-96) requirements of the 4th, 6 joints: sewer line must be done the inspection of pound water by joint (pipeline between two inspection chambers is a joint).Shown in Fig. 1 pipeline pound water test synoptic diagram, the every joint of diplopore box culvert must be built the envelope wall by laying bricks or stones, and box culvert is for there being the pressure box culvert, and pressure head is 12m, and then end socket place mean pressure head is 10.25m (12-3.5/2=10.25m).So the pulling force that the single section header of diplopore box culvert is subjected to is: P=p
cA=ρ gh
cA=10 * 10.25 * 3.5 * 4.25=1524.7KN; Add up to pulling force: 152.5 tons.Under the effect of so big pulling force, the box culvert joint is very easy to destroy, so sewer line pound water test seems unrealistic concerning box culvert in large size.
In addition, this engineering box culvert mileage is long, and the monomer distribution in the box culvert is more diffusing, as adopting the inspection of pipe manhole pound water, test required water amount is difficult to guarantee that box culvert always has 6 construction operation faces in construction simultaneously, construction surface is disperseed, and construction speed can not be fully synchronously, and also have local monomer must after do as metering well etc., integrate the needs that are difficult to satisfy this engineering construction according to the testing program of specification recommends.
Traditional box culvert pipe detection method (as upstream, Shanghai City diversion works) of past is the segmentation pressurization of pouring water, and two ends add special steel and seal up a door, and observe its seepage situation.Along with the scale of municipal works is increasing, the difficult problem that this kind method runs into is: water consumption is big, and difficulty is sought at the water source; When the box culvert pipe detected, the two ends steel was sealed up a door and will be born huge horizontal thrust, the steel fabrication and installation difficulty of sealing up a door; After pouring water in box culvert pipe inside, the significant horizontal thrust that is produced under the internal water pressure effect can make the box culvert pipe produce the vertical equity displacement, very easily causes the drawing crack infiltration of waterstop; As find that there is seepage the part, water all must be bled off the detection of need pouring water once more after leak stopping is repaired; Sense cycle is long, the expense height.So these class methods also can't satisfy the large-scale watertightness detection of pressing box culvert that has.
Summary of the invention
Technical matters to be solved by this invention provides a kind of can the detection large-scalely has the checkout equipment of pressing the box culvert watertightness, and a kind of this checkout equipment that uses carries out the method that watertightness detects to box culvert, to overcome the above-mentioned defective that prior art exists.
The present invention is design like this: the box culvert seepage is mainly reflected in the interface infiltration of waterstop expansion joint owing to problems such as stratum non-uniform settling or construction quality cause.This is because the box culvert interface mainly is to adopt waterstop, is fixed in the concrete by design attitude and waterstop is difficult when construction, and it is real that the concrete at this place is difficult for the shake puddling, can cause peeling off between waterstop and the concrete again during concrete shrinkage.Even can overcome above-mentioned unfavorable factor in the work progress, box culvert bankets the back because load influences and the difference of sedimentation all can have a negative impact to waterstop and concrete cohesive force, so the weak part of box culvert seepage is an interface.In addition because the box culvert concrete is C25P8, so in general the water percolating capacity of wallboard can be ignored, the local main interface at box culvert of seepage takes place, therefore at box culvert interface seepage, specialized designs go out a cover detect interface seepage checkout equipment and adopt this checkout equipment that the watertightness of box culvert is detected, should be testing program more targetedly.
Technical solution of the present invention is as follows:
A kind of box culvert in large size watertightness checkout equipment, it is characterized in that, comprise compression system, sealing system, water filling system, support system and measuring system, described sealing system comprises the annular seal truss and the sealing strip that can form gas-tight silo with the box culvert seam, described sealing truss is fixedly installed on the support system, described sealing strip is arranged on the end of sealing truss, and described compression system, water filling system communicate with gas-tight silo respectively.
Described water filling system comprises feed pipe, handlance pump and water storage box, by feed pipe and water pump to the sealing system water-filling.
Also comprise mobile system, comprise mobile wheel carrier and move wheel that described mobile wheel carrier is fixedlyed connected with support system.When conveniently finishing a box culvert joint, shift to next joint test joint.
Described support system comprises scaffold and channel-section steel, and micromatic setting is set in the scaffold, contacts little prestress that adds in process of the test with the tight of box culvert interface thereby can guarantee to seal truss.Described compression system comprises supercharge pump and stop valve, guarantee that hydraulic pressure is the high hydraulic pressure of 12m in the sealing system, in compression system, also reverse valve can be set, to reach pressure stabilization function, it is voltage-stabilizing system, feed pipe flows to sealing system in inlet opening, box culvert base plate joint, at box culvert top board place 2 ventholes is set, and guarantees to be full of water in the whole sealing system.Described measuring system comprises flow pump, water pressure gauge and stopwatch.Measure rate of water make-up in gas-tight silo with flowmeter in the process of the test, whether stable with hydraulic pressure in the hydraulic pressure list deciding gas-tight silo, go out the water percolating capacity of box culvert joint then by the theoretical formula inverse.For guaranteeing the precision of measurement data, all manometric precision are not less than 1.5 grades, and manometric maximum range is 1.3～1.5 times of test pressure, and the diameter of dial plate is not less than 150mm.
A kind of box culvert in large size watertightness detection method comprises and uses aforesaid checkout equipment that the box culvert watertightness is detected, and at first installation and measuring equipment makes the box culvert inwall form the annular seal storehouse between parting place and sealing truss; Adopt water flood that gas-tight silo is carried out watertightness test by compression system, water filling system and measuring system then.
Rubber cushion by prefabricated external arc inner bevel before also comprising the steps: to detect is transformed into circular arc with four chamferings of box culvert.
The pressure testing acceptance criteria: box culvert joint hydraulic testing outward appearance criterion of acceptability is: the box culvert joint outside and inboard no injection point, do not have along wall flowing water phenomenon; The intensity criterion of acceptability is: test pressure 0.12Mpa effect down, constant voltage 10min checks interface, when pipe shaft does not have breakage and drainage, the pipeline strength test is for qualified.
Seam water percolating capacity standard is: water percolating capacity: Q=0.014D.(by " code for construction and acceptance of water supply and sewerage pipeline engineering " GB50268-97 regulation)
Q-allows water percolating capacity (L/ (minkm);
The effective internal diameter of D-pipeline (mm).
By adopting checkout equipment of the present invention that the watertightness of 160 joints of whole box culvert engineering is detected, the result is for all qualified.
By above disclosed technical scheme as can be known, the present invention is by the design specialized checkout equipment, by forming independent gas-tight silo at the parting place, employing single hole parting method one by one carries out waterproof test to box culvert, overcome the defective that can not carry out the watertightness detection to box culvert in large size that traditional box culvert watertightness test method exists, whole in addition assay device structures is simple, and detection method also has simply, quick, low cost and other advantages.
Description of drawings
Fig. 1 is existing pipeline pound water test synoptic diagram;
Fig. 2 is a box culvert in large size watertightness assay device structures synoptic diagram of the present invention;
Fig. 3 is a box culvert watertightness checkout equipment cut-open view of the present invention.
Embodiment
Further specify specific embodiments of the invention below in conjunction with accompanying drawing.
Referring to Fig. 2, shown in Figure 3, box culvert in large size watertightness checkout equipment of the present invention, comprise compression system 1, sealing system 2, water filling system 3, support system 4 and measuring system 5, described sealing system 2 comprises the annular seal truss 202 and the sealing strip 203 that can form gas-tight silo 201 with box culvert seam 8, described sealing truss 202 is fixedly installed on the support system 4, described sealing strip 203 is arranged on the end of sealing truss 202, and described compression system 1, water filling system 3 communicate with gas-tight silo 201 respectively.Described water filling system 3 comprises feed pipe, handlance pump and water storage box, by feed pipe and water pump to the sealing system water-filling.Described support system 4 comprises channel-section steel 401 and scaffold 402, micromatic setting 403 is set in the scaffold, described compression system 1 comprises supercharge pump 101 and stop valve 102, reverse valve is set in compression system, feed pipe flows in the gas-tight silo of sealing system in inlet opening, box culvert base plate joint, and 2 ventholes 204 are set on the sealing truss at distance box culvert top board place.Described measuring system 5 comprises water pressure gauge 501, flow pump 502 and stopwatch 503.For considering that sealing system can adapt to the requirement of concrete flatness, rubber weather strip 203 thickness are got and are decided to be 2cm.
Also comprise mobile system, comprise mobile wheel carrier 6 and move wheel 7 that described mobile wheel carrier 6 is fixedlyed connected with support system 4.
Further describe the process that checkout equipment of the present invention carries out the box culvert waterproof test of using below.
1) test principle is the relative theory of water flood, and at first hydraulic pressure begins to clock after rising to test pressure, when pressure descends, and moisturizing in gas-tight silo in time, whole test is no less than 2 hours perdurability, and has write down time on test and mended the water yield.Mend the water yield and be the box culvert interface interior infiltration capacity of test period again.
2) judge air scavenge in the gas-tight silo.
At first before official test, carry out multinomial classification pressure build-up test, open pore simultaneously, gas is discharged gradually, after the gas emptying, can carry out the formal hydraulic testing.If gas is not got rid of, the water percolating capacity of being measured is false, judges whether gas is got rid of, can determine from following three phenomenons:
The first kind, when being full of water in the gas-tight silo, but it is slow to boost.Second class, when with test pump in pipeline during water-filling, along with fluctuating of pitcher pump handle, the indicator amplitude of fluctuation is bigger, and the reading instability.
The 3rd class when hydraulic pressure rises to 80% test pressure, stops to boost, and opens the joint door that discharges water of connecting pipe then, has the sound of " thumping " when discharging water in the water column, and the ejection numerous air-bubble.
More than the appearance of three phenomenons, show that gas is not got rid of in the pipeline.Only disappear when above phenomenon, and the water pump priming boosts when very fast, can confirm that gas gets rid of.Carry out the formal hydraulic testing, the water percolating capacity of being surveyed is real this moment.
3) influence factor of the infiltration standard in the testing process
After the pump water pressure was stable, interface all had a certain amount of infiltration, but this and do not mean that the box culvert interface tube itself has seepage, this be because: box culvert tube wall surface concrete has bigger water absorptivity; The elastic expansion of caulking gum band; There are compression creep in rubber fastening band stretcher strain and filleting in the box culvert interface; The water that rubber seal tape detects water cavity permeates in box culvert tube wall face, promptly occurs infiltration on the wall.
Therefore, it is unavoidable that the interface detection has infiltration, and problem is how to measure exactly, according to measured result, comprehensive various unfavorable factors are determined a limit leakage then, in order to differentiate the seam seepage whether in the allowed band of regulation, determine that a qualified mark pushes away.
4) preparation before the pressure testing
Should meet the following requirements before the hydraulic testing of box culvert joint: more than the box culvert 28d age of concrete, or intensity reaches designing requirement; Box culvert inwall position to be tested must be checked earlier and handle, and reaches smooth smooth, does not allow uneven; For guaranteeing the applying of pressure testing device and box culvert inwall well, consider the circular arc expansion principle of hydraulic pressure instrument square cushion rubber, 4 chamferings of box culvert (300*300mm) are transformed into circular arc by the rubber cushion of prefabricated external arc inner bevel, to reach optimum stagnant water effect.
5) test procedure
At first installation and measuring equipment makes the box culvert inwall form the annular seal storehouse between parting place and sealing truss; Gas-tight silo water-filling: open venthole and advance gas-tight silo with handlance pump pump water, when a large amount of water outlet of venthole, the venthole valve closing, after the exhaust first pressurization value be 0.04Mpa, check and write down pressure testing device whether seal behind the constant voltage 10min, outside the expansion joint example and peripheral concrete whether seepage, emit water, and situation of change such as water pressure, atmospheric pressure.Just allow to continue next process when complete guaranteeing that safety and gas-tight silo seal, carry out the classification pressurization by 0.02Mpa then, need repeat above-mentioned observation, record material after the pressurization, whether emptying of gas in the standard determination gas-tight silo of whether getting rid of according to gas simultaneously as not emptying, should be opened venthole, repeat above step, under the prerequisite that guarantees gas emptying, the principle by the classification pressurization adds to test pressure with the hydraulic pressure in the gas-tight silo.
Official test: hydraulic pressure rises to test pressure in gas-tight silo, after all check normally, start manual time-keeping, flowmeter begins to count water pump and mends into the water yield, formally begin test, when hydraulic pressure in the gas-tight silo descends, in time mend into the water yield by water pump, flowmeter is measured and is mended the water yield, test period is not less than 2 hours, provides complete testing data after pressure testing finishes: comprise draining, exhaust: after pressure testing is finished, the pressure testing water in the sealed cistern is reclaimed for continuing use next time, and with the pneumatic tyre venting, so that pressure testing device moves to next pressure testing point.
Claims (7)
1. box culvert in large size watertightness checkout equipment, it is characterized in that, comprise compression system, sealing system, water filling system, support system and measuring system, described sealing system comprises the annular seal truss and the sealing strip that can form gas-tight silo with the box culvert seam, described sealing truss is fixedly installed on the support system, described sealing strip is arranged on the end of sealing truss, and described compression system, water filling system communicate with gas-tight silo respectively.
2. box culvert watertightness checkout equipment according to claim 1 is characterized in that described water filling system comprises water supply, handlance pump and water storage box, by feed pipe and water pump to the sealing system water-filling.
3. box culvert watertightness checkout equipment according to claim 2 is characterized in that, also comprises mobile system, comprises mobile wheel carrier and moves wheel, and described mobile wheel carrier is fixedlyed connected with support system.
4. according to each described box culvert watertightness checkout equipment of claim 1 to 3, it is characterized in that described support system comprises scaffold and channel-section steel, micromatic setting is set in the scaffold, described compression system comprises supercharge pump and stop valve, and described measuring system comprises flow pump, water pressure gauge and stopwatch.
5. box culvert watertightness checkout equipment according to claim 4 is characterized in that, also comprises voltage-stabilizing system, and described voltage-stabilizing system is the reverse valve that is arranged on the pressure charging system.
6. box culvert in large size watertightness detection method, it is characterized in that, comprise using and the box culvert watertightness detected that at first installation and measuring equipment makes the box culvert inwall form the annular seal storehouse between parting place and sealing truss as each described checkout equipment of claim 1 to 5; Adopt water flood that gas-tight silo is carried out watertightness test by compression system, water filling system and measuring system then.
7. box culvert watertightness detection method according to claim 6 is characterized in that, the rubber cushion by prefabricated external arc inner bevel before also comprising the steps: to detect is transformed into circular arc with four chamferings of box culvert.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510025722 CN1687732A (en) | 2005-05-10 | 2005-05-10 | Equipment and method for testing watertightness of box culvert in large size |
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| CN 200510025722 CN1687732A (en) | 2005-05-10 | 2005-05-10 | Equipment and method for testing watertightness of box culvert in large size |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175406A (en) * | 2011-01-27 | 2011-09-07 | 中交四航工程研究院有限公司 | Test system and test method for water tightness test of tunnel deformation joint waterstop |
| CN102605724A (en) * | 2012-03-09 | 2012-07-25 | 刘山健 | Prefabricated laminated steel concrete two-hole culvert |
| CN102829922A (en) * | 2012-08-23 | 2012-12-19 | 上海第一机床厂有限公司 | Water pressure tester for welding seal shell and test method thereof |
| CN103557994A (en) * | 2013-11-21 | 2014-02-05 | 深圳市城市优筑科技有限公司 | External window side seam waterproof detection method and detection device |
| CN104713688A (en) * | 2015-04-02 | 2015-06-17 | 山东省科学院海洋仪器仪表研究所 | Device and method for detecting watertightness of underwater instrument capsule |
| CN104880289A (en) * | 2015-02-16 | 2015-09-02 | 中交第二航务工程局有限公司 | Immersed tube sealing test system |
| CN107843394A (en) * | 2017-12-22 | 2018-03-27 | 青岛昊河水泥制品有限责任公司 | A kind of seal test device and test method for concrete box culvert |
| CN111458086A (en) * | 2020-04-01 | 2020-07-28 | 井浩 | Method for rapidly detecting waterproof quality of assembled box culvert seam |
| CN111693219A (en) * | 2020-07-29 | 2020-09-22 | 广西建工集团联合建设有限公司 | Device and method for detecting sealing performance of concrete pipeline joint |
| CN113655121A (en) * | 2021-08-30 | 2021-11-16 | 华能洋浦热电有限公司 | Detection device for corrosion of inner side of box culvert |
-
2005
- 2005-05-10 CN CN 200510025722 patent/CN1687732A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175406A (en) * | 2011-01-27 | 2011-09-07 | 中交四航工程研究院有限公司 | Test system and test method for water tightness test of tunnel deformation joint waterstop |
| CN102605724A (en) * | 2012-03-09 | 2012-07-25 | 刘山健 | Prefabricated laminated steel concrete two-hole culvert |
| CN102829922B (en) * | 2012-08-23 | 2015-06-17 | 上海第一机床厂有限公司 | Water pressure tester for welding seal shell and test method thereof |
| CN102829922A (en) * | 2012-08-23 | 2012-12-19 | 上海第一机床厂有限公司 | Water pressure tester for welding seal shell and test method thereof |
| CN103557994A (en) * | 2013-11-21 | 2014-02-05 | 深圳市城市优筑科技有限公司 | External window side seam waterproof detection method and detection device |
| CN104880289A (en) * | 2015-02-16 | 2015-09-02 | 中交第二航务工程局有限公司 | Immersed tube sealing test system |
| CN104713688A (en) * | 2015-04-02 | 2015-06-17 | 山东省科学院海洋仪器仪表研究所 | Device and method for detecting watertightness of underwater instrument capsule |
| CN107843394A (en) * | 2017-12-22 | 2018-03-27 | 青岛昊河水泥制品有限责任公司 | A kind of seal test device and test method for concrete box culvert |
| CN111458086A (en) * | 2020-04-01 | 2020-07-28 | 井浩 | Method for rapidly detecting waterproof quality of assembled box culvert seam |
| CN111458086B (en) * | 2020-04-01 | 2021-12-07 | 井浩 | Method for rapidly detecting waterproof quality of assembled box culvert seam |
| CN111693219A (en) * | 2020-07-29 | 2020-09-22 | 广西建工集团联合建设有限公司 | Device and method for detecting sealing performance of concrete pipeline joint |
| CN113655121A (en) * | 2021-08-30 | 2021-11-16 | 华能洋浦热电有限公司 | Detection device for corrosion of inner side of box culvert |
| CN113655121B (en) * | 2021-08-30 | 2024-04-12 | 华能洋浦热电有限公司 | Detection device for corrosion of inner side of box culvert |
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