CN105157922A - Apparatus for testing watertightness of shield tunnel elastic sealing gasket in conditions with different bench staggering quantities - Google Patents
Apparatus for testing watertightness of shield tunnel elastic sealing gasket in conditions with different bench staggering quantities Download PDFInfo
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- CN105157922A CN105157922A CN201510411348.4A CN201510411348A CN105157922A CN 105157922 A CN105157922 A CN 105157922A CN 201510411348 A CN201510411348 A CN 201510411348A CN 105157922 A CN105157922 A CN 105157922A
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- sealing gasket
- elastic sealing
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Abstract
The invention discloses an apparatus for testing watertightness of a shield tunnel elastic sealing gasket in conditions with different bench staggering quantities. The testing apparatus comprises a rigid rib-equipped plate and four rigid flats. The rigid rib-equipped plate is composed of a main plate and a pair of rib plates. The rib plates are respectively arranged on the two sides of the main plate waist part in a staggered way. The rib plate staggering quantity is the bench staggering quantity of the elastic sealing gasket. The bench staggering quantity ranges from 1 mm to 14 mm. The apparatus for testing watertightness of the shield tunnel elastic sealing gasket in conditions with different bench staggering quantities overcomes the limits in a conventional test method that penetration performance of only the elastic sealing gasket and steel template contacting face is investigated. The apparatus which can have tests and researches performed for the penetration performance of the elastic sealing gasket and concrete contacting face better simulates the boundary conditions of the sealing gasket in real projects and achieves more objective and reasonable evaluating indexes. Furthermore, the testing apparatus can be used in a way to match a currently widely used common concrete anti-permeability instrument. The processing cost is further lowered.
Description
Technical field
The present invention relates to Tunnel Engineering technical field, particularly relating to a kind of verifying attachment for measuring the elastic sealing gasket of shield tunnel of directly fitting from the concrete watertightness when different faulting of slab ends amount.
Background technology
In shield tunnel construction and subsequent sedimentation process, the length travel between concrete pipe sheet is called as faulting of slab ends.In shield tunnel construction, section of jurisdiction scale error, assembled process top power is uneven, around the factors such as soil layer otherness all can produce faulting of slab ends amount, and then hidden danger is brought to the waterproof of engineering and safe operation.
Domestic scholars substantially adopts at present and replaces the method for concrete groove to carry out the water resistance research of elastic sealing gasket of shield tunnel with steel groove, and the border of sealing gasket and friction condition are difficult to be met.In existing national standards " high polymer waterproof material the 4th part: shield tunnel section of jurisdiction rubber gasket " (GB18173.4-2010), detailed discussion is carried out to water pressure resistance simulation experiment method, utilizing the water pressure resistance testing device of simulation pipe sheet assembling seam, measuring the hydraulic pressure force value that sealing gasket can bear when designing wrong trace and joint open.Publication No. is that the Chinese patent of CN101929911A discloses a kind of elastic sealing gasket of shield tunnel watertightness verifying attachment, effectively can simulate the water proof case of section of jurisdiction elastic sealing gasket under different joint open and faulting of slab ends amount situation.But above-mentioned test method only simulates the sealing effectiveness between elastic sealing gasket and cover plate in laminating situation, there is certain difference with the sealing effectiveness under actual condition Elastic sealing gasket and concrete laminating situation.
Therefore, how to solve the problem and become the technical matters that those skilled in the art need solution badly.
Summary of the invention
For Problems existing in background technology, the object of the present invention is to provide a kind of elastic sealing gasket of shield tunnel watertightness verifying attachment when different faulting of slab ends amount, the application uses elastic sealing gasket of shield tunnel watertightness verifying attachment when different faulting of slab ends amount, expand in existing method of testing the limitation only relating to and investigate elastic sealing gasket and steel form surface of contact permeance property, Test And Research Work can be carried out for elastic sealing gasket and concrete surface permeance property, simulate the boundary condition of sealing gasket in Practical Project better, evaluation index is more objective and reasonable, in addition, the verifying attachment of the application can support the use with the concrete impervious instrument of now widely used plain edition, reduces processing cost.
The object of the invention is to be achieved through the following technical solutions:
A kind of elastic sealing gasket of shield tunnel watertightness verifying attachment when different faulting of slab ends amount, described verifying attachment comprises one piece of rigid strip floor and four pieces of stiffener plate; Wherein, described rigid strip floor is made up of mainboard and a pair floor, and described a pair floor staggers respectively and be arranged at the both sides of described mainboard waist; The offset of a pair floor is the faulting of slab ends amount of elastic sealing gasket, and described faulting of slab ends amount is 1mm ~ 14mm.
Further, the longitudinal profile of described mainboard is trapezoidal, the width 175mm suitable for reading of described mainboard, end opening width 185mm, height 150mm, and the thickness of mainboard, according to the setting of elastic sealing gasket of shield tunnel joint open, is 2mm ~ 12mm.
Further, described floor cross section is isosceles trapezoid, and the size of floor sets according to the cross dimensions of sealing gasket, and the thickness of each floor is 14mm ~ 36mm, and outer width is 30mm ~ 45mm, and insied width is 35mm ~ 50mm.
Further, described stiffener plate is the subset of described mainboard, and namely its length and width are contained in described mainboard, thickness is identical with described mainboard thickness
The present invention has following positive technique effect:
The invention has the advantages that, use the verifying attachment of the watertightness when different faulting of slab ends amount from the elastic sealing gasket of shield tunnel that concrete is directly fitted, one is expanded in existing method of testing the limitation only relating to and investigate elastic sealing gasket and steel form surface of contact permeance property, Test And Research Work can be carried out for elastic sealing gasket and concrete surface permeance property, simulate the boundary condition of sealing gasket in Practical Project better, evaluation index is more objective and reasonable; Two is can support the use with the concrete impervious instrument of now widely used plain edition, reduces processing cost.Assay method provided by the invention has the advantages such as more consistent with Practical Project boundary condition, equipment is simple, easy to operate, shaping work amount is little, measured result is good, is applicable to carry out the waterproof test research work of elastic sealing gasket of shield tunnel when different faulting of slab ends amounts and different joint open.
Accompanying drawing explanation
Fig. 1 is stereographic map of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is right view of the present invention;
Fig. 4 is the stereographic map of formation of concrete sample of the present invention.
Embodiment
Below, with reference to accompanying drawing, more fully illustrate the present invention, accompanying drawing acceptance of the bid shows exemplary embodiment of the present invention.But the present invention can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.But, these embodiments are provided, thus make the present invention comprehensively with complete, and scope of the present invention is fully conveyed to those of ordinary skill in the art.
For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.
As Figure 1-4, a kind of elastic sealing gasket of shield tunnel of this device watertightness verifying attachment when different faulting of slab ends amount is made up of one piece of rigid strip floor and four pieces of stiffener plate 2.Rigid strip floor mainboard 1 width 175mm suitable for reading, end opening width 185mm, height 150mm.The thickness of rigid strip floor mainboard 1 is determined, between 2mm ~ 12mm according to elastic sealing gasket of shield tunnel joint open; A pair floor 3 is arranged in mainboard 1 both sides, the size misalignment of floor 3 center, and departure is between 1mm ~ 14mm; Cross section is isosceles trapezoid, and size is determined according to the cross dimensions of sealing gasket, and thickness is between 14mm ~ 36mm, and outer width is between 30mm ~ 45mm, and insied width is 35mm ~ 50mm.Stiffener plate 2 is the subset of rigid strip floor mainboard 1, and namely its length and width are contained in described rigid strip floor mainboard 1, and thickness is identical with rigid strip floor mainboard 1.
At present, the design process of elastic sealing gasket is still in the Experience Design stage, existing sealing gasket waterproof detection experiment device mostly also is the anti-aqueous condition in simulation sealing gasket and cover plate surface of contact or two sealing gasket self-contact faces, is not inconsistent, has been difficult to appraisement system accurately with Practical Project situation.
Using in national act.std about concrete permeability resistance mould shaping upper diameter to be 175mm, and lower diameter is 185mm, the high filled circles mesa-shaped concrete sample for 150mm.Rigid strip floor of the present invention and above-mentioned concrete permeability resistance mould is used to carry out assembly, formation of concrete sample, be two fluted half round table-like concret blocks of band after maintenance form removal, the gross thickness of two block concrete sample grooves is the gross thickness of the floor of rigid strip floor, and the thickness of two block concrete sample seam crossings is the thickness (as shown in Figure 4) of rigid strip floor mainboard.
After arriving curing age, taking-up concrete sample is also clean by surface wipes.Illustrated state is faulting of slab ends splicing state, i.e. two block concrete sample groove center size misalignment, and grooved position deviation is between 1mm ~ 14mm, and therefore two elastic sealing gaskets loaded in groove exist the faulting of slab ends amount of 1mm ~ 14mm.Now do not close between concrete sample and put in place, the width of seam crossing is section of jurisdiction joint open.Due to the thickness of described stiffener plate and the consistency of thickness of rigid strip floor main board, now four pieces of stiffener plate are placed in two block concrete sample seam crossings respectively, accurately can simulate the test situation of elastic sealing gasket when specific joint open state.
Carry out test specimen sealing subsequently.When sealing with paraffin, at the paraffin of sample surrounding package one melting layer, then with pressurizer press-in in the die trial of baking oven or electric furnace preheating, described die trial is die trial general in concrete impermeability test.Make sample concordant with at the bottom of die trial, die trial temperature return, to pressure relief during room temperature, loads concrete impervious instrument subsequently and tests.
Start Anti-leakage instrument, under pressure water action, observe the end face situation of concrete sample.If two elastic sealing gasket joint faces or elastic sealing gasket and concrete surface seep water to have infiltration to be judged to be between two block concretes, record the one-tenth-value thickness 1/10 of now water pressure and floor; If have infiltration between concrete and urceolus, show that the sealing property of sample and die trial is bad, need again test by after above-mentioned sealing step sealing.
To certain specific elastic sealing gasket, the mainboard thickness of rigid strip floor in this contrive equipment and the faulting of slab ends amount of floor can be changed, repeat above-mentioned steps and carry out water penetration test, obtain the water-resistant pressure of elastic sealing gasket under different joint open and different faulting of slab ends amount state.
Described just in order to the present invention is described above, be construed as the present invention and be not limited to above embodiment, meet the various variants of inventive concept all within protection scope of the present invention.
Claims (4)
1. elastic sealing gasket of shield tunnel watertightness verifying attachment when different faulting of slab ends amount, is characterized in that, described verifying attachment comprises one piece of rigid strip floor and four pieces of stiffener plate; Wherein, described rigid strip floor is made up of mainboard and a pair floor, and described a pair floor staggers respectively and be arranged at the both sides of described mainboard waist; The offset of a pair floor is the faulting of slab ends amount of elastic sealing gasket, and described faulting of slab ends amount is 1mm ~ 14mm.
2. verifying attachment according to claim 1, is characterized in that, the longitudinal profile of described mainboard is trapezoidal, the width 175mm suitable for reading of described mainboard, end opening width 185mm, height 150mm, the thickness of mainboard, according to the setting of elastic sealing gasket of shield tunnel joint open, is 2mm ~ 12mm.
3. verifying attachment according to claim 1, is characterized in that, described floor cross section is isosceles trapezoid, the size of floor sets according to the cross dimensions of sealing gasket, the thickness of each floor is 14mm ~ 36mm, and outer width is 30mm ~ 45mm, and insied width is 35mm ~ 50mm.
4. verifying attachment according to claim 1, is characterized in that, described stiffener plate is the subset of described mainboard, and namely its length and width are contained in described mainboard, thickness is identical with described mainboard thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411348.4A CN105157922B (en) | 2015-07-14 | 2015-07-14 | A kind of elastic sealing gasket of shield tunnel is the watertightness method of inspection when different faulting of slab ends amount |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510411348.4A CN105157922B (en) | 2015-07-14 | 2015-07-14 | A kind of elastic sealing gasket of shield tunnel is the watertightness method of inspection when different faulting of slab ends amount |
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| CN105157922A true CN105157922A (en) | 2015-12-16 |
| CN105157922B CN105157922B (en) | 2016-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121245A (en) * | 2017-04-26 | 2017-09-01 | 同济大学 | Shield tunnel lining segment two seals pad waterproof ability test device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107121245A (en) * | 2017-04-26 | 2017-09-01 | 同济大学 | Shield tunnel lining segment two seals pad waterproof ability test device and method |
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| CN105157922B (en) | 2016-09-14 |
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