CN205246284U - Shield tunnel segment ring stitches impervious performance testing system - Google Patents
Shield tunnel segment ring stitches impervious performance testing system Download PDFInfo
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- CN205246284U CN205246284U CN201520739323.2U CN201520739323U CN205246284U CN 205246284 U CN205246284 U CN 205246284U CN 201520739323 U CN201520739323 U CN 201520739323U CN 205246284 U CN205246284 U CN 205246284U
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Abstract
The utility model relates to a shield tunnel segment ring stitches impervious performance testing system, including being used for the experimental section of jurisdiction test piece of circumferential weld impervious performance, be located the frame, water pressure loading subassembly supply tank, hydraulic press that connects gradually through the water pipe and the aqua storage tank of taking the scale, observational record subunit spare, including laser displacement sensor and digital close -range photogrammetry equipment. The utility model discloses utilize conventional section of jurisdiction mechanical properties testing system to carry out the loading, the waterproof performance who accomplishes the shield tunnel lining segment circumferential weld is experimental, atress and the deformation state of accurate simulation shield tunnel circumferential weld under actual conditions, in order to record the shield tunnel circumferential weld difference volume of opening, waterproof ability under the operating modes such as dislocation volume and open -angle, the design that becomes more meticulous for the tunnel engineering seam is waterproof provides quantitative reference frame, assurance test section of jurisdiction component and the uniformity of actual tunnel segment preparation precision and the accuracy of tentation data, reduce the steel mould processing cost of test piece, test time is shortened.
Description
Technical field
The present invention relates to a kind of experimental rig, especially relate to a kind of duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system.
Background technology
Along with moving forward steadily of China's new round Development of China's Urbanization, urban track traffic has become expansion city physical space, the important way that facilitates the people to go on a journey. And hand over the running tunnel of the system core as city rail, adopt in a large number shield method. Current shield tunnel lining structure mostly is prefabricated reinforced concrete section of jurisdiction and is spliced by connecting bolt, due to the structural property of segment joint, seam rigidity and bearing capacity are far below rigidity and the bearing capacity of section of jurisdiction itself, it is the stressed weak link in tunnel, especially in the little stratum of this class lateral pressure coefficient of muddy soft soil, under the impact of periphery engineering activity, very easily there is the larger distortion of seam corner, seam and open distortion and seam dislocation distortion.
For shield tunnel, percolating water is an outstanding difficult problem for puzzlement structure of the subway safety and normal operation always. Investigation discovery, most percolating water all betides segment joint position, and the general elastic sealing gasket sticking near section of jurisdiction extrados that adopts of the waterproof sealing of seam is realized. As can be seen here, the anti-permeability performance of tunnel seam is most important for the reliable military service of shield tunnel. The seam of shield tunnel can be divided into longitudinal seam (section of jurisdiction-section of jurisdiction) and hoop seam (Lining Ring-Lining Ring). Therefore,, for ensureing the waterproof sealing of shield tunnel in horizontal and vertical two dimensions, need to carry out impervious mechanism research for longitudinal seam and hoop seam respectively.
Make a general survey of domestic and international shield tunnel seam waterproof correlation test device, patent of invention as published in Tongji University---elastic sealing gasket of shield tunnel " yi word pattern " watertightness verifying attachment (CN201010145789), the published utility model patent of Central South University---shield duct piece joint anti-permeability performance experimental rig (CN104075854A), propose to open separately rectangular channel on upper and lower two steel cover plates, after being sealed into frame type, elastic sealing gasket adopts gluing being connected in groove, sealing gasket is compressed with bolt, utilize the difference amount of opening of pad simulation section of jurisdiction, simultaneously at device sidewall mounting limit plate, with the faulting of slab ends situation of simulation section of jurisdiction. above-mentioned patent is all indoor model tests of small scale, and itself just exists following problems:
1) front duct pieces of shield tunnel is taking prefabricated reinforced concrete section of jurisdiction pattern as main, and employing steel groove can not reflect the true condition that contacts of elastic sealing gasket elastomeric material and concrete groove, thereby result of the test and the larger discrepancy of engineering physical presence;
2) a large amount of Engineering Projects show, due to the construction deviation of construction stage duct piece assembling machine, and operation stage soft soil layer the stack of the multiple factors such as relative settlement, very easily there is the faulting of slab ends amount of 15mm in circumferential weld and circumferential weld, and be limited to the size of cover plate, cannot carry out seam big shearing working condition tests;
3) adopt bolt to compress the simulation seam amount of opening, the spacing simulation seam of pad faulting of slab ends amount, needs manual setting to measure, and test accuracy is lower;
4) this patent of invention is positioned the subway tunnel of the diameter 6m left and right that adopts single track elastic sealing gasket waterproof, corresponding cover plate size is less, cannot scientific evaluation adopts the waterproof ability of major diameter cross-river tunnel more than the diameter 10m of two pass elastic sealing gasket waterproof;
5) ignored shield tunnel circumferential weld and the connection of circumferential weld and the otherness of structure, broadly the impervious condition of two kinds of different seams has been lumped together;
6) can not simulate the waterproof ability of actual reinforced concrete segment seam under different open-angles.
7) waterproof test based on punching block fixture, mechanical behavior and contact condition that cannot simulating reinforced concrete segment joint reality.
In addition,, by the investigation to domestic and international Patents and document, do not find to carry out for tunnel circumferential weld waterproof sealing ability the experimental rig of assay.
In sum, in view of the stress of duct pieces of shield tunnel seam complexity with contact condition; the indoor model test of small scale is difficult to the waterproof sealing mechanism that accurately reflects that it is true and reliable; therefore research and develop duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system, most important for the deep development that promotes shield tunnel waterproof technique field.
Summary of the invention
Object of the present invention is exactly the duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system that a kind of guarantee test data accuracy is provided in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
Duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system, comprising:
For the duct piece specimen of circumferential weld anti-permeability performance test, be positioned at framework,
Water hydraulic static pressure loading assembly, comprises the supply tank, hydraulic press and the aqua storage tank with rule that connect successively through water pipe,
Observational record sub-component, comprises laser displacement sensor and Digital Close-range Photogrammetry equipment.
Described duct piece specimen is constituted by JiBXing section of jurisdiction, A type section of jurisdiction,
Described A type section of jurisdiction, by consisting of curved bolted two sections of jurisdiction of hoop, forms longitudinal joint between the interface of two sections of jurisdiction, and section of jurisdiction has longitudinal groove on corresponding contact face, is provided with a circle elastic sealing gasket in longitudinal joint,
Described Type B section of jurisdiction is two sections of jurisdiction that connect A type section of jurisdiction by longitudinally oblique bolt, forms circumferential weld between interface, and section of jurisdiction has hoop groove on corresponding contact-making surface, is provided with a circle elastic sealing gasket in circumferential weld; The inner ring of this elastic sealing gasket surrounds a hydraulic pressure chamber.
Described Type B section of jurisdiction is provided with the water filling duct with Water hydraulic static pressure loading assembly UNICOM.
Described water filling duct is embedded in inside, Type B section of jurisdiction, on the extrados of section of jurisdiction, is connected as press water water inlet with Water hydraulic static pressure loading assembly by bolt hole.
Described duct piece specimen arranges respectively hoop groove and longitudinal groove and pastes elastic sealing gasket on circumferential weld and longitudinal joint contact-making surface, forms airtight pressure water action space.
Water pipe between described hydraulic press and the aqua storage tank with rule is provided with valve, and water pipe, being reserved with bolt hole near duct piece specimen one side, is connected with water pressure gauge by this bolt hole.
Described laser displacement sensor is connected to the lower surface of framework back timber, the signal output part of this laser displacement sensor with load the displacement signal input of actuator and be connected, the control output end of described loading actuator respectively with X to loading the control input end of actuator, control input end that Y-direction loads actuator and the corresponding connection in control input end of Z-direction loading actuator.
Described X loads actuator control duct piece specimen and moves upward three sides to loading actuator, Y-direction loading actuator, Z-direction.
Described Digital Close-range Photogrammetry equipment is made up of two high pixel digital single-lens reflex cameras, tripod and four photograph lamp boxes.
Compared with prior art, the present invention has the following advantages:
1) can utilize conventional duct piece connector mechanical property testing system to load, complete the water resistance test of shield tunnel lining segment circumferential weld, fully excavate the potentiality of existing testing equipment;
2) adopt the existing punching block of shield tunnel to carry out the making of developmental tube sheet element, can not only guarantee test section of jurisdiction member and actual tunnel section of jurisdiction make the uniformity of precision, ensure the accuracy of test data, and reduced the punching block processing cost of test specimen, shortened test period;
3) overcome the shortcomings such as indoor small scale model test and actual shield tunnel circumferential weld contact condition are misfitted, precision is low, error is large, result of the test is more true and reliable.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the main TV structure schematic diagram of section of jurisdiction charging assembly;
Fig. 3 is the side-looking structural representation of section of jurisdiction charging assembly;
Fig. 4 is the plan structure schematic diagram of section of jurisdiction charging assembly;
Fig. 5 is the structural representation of duct piece specimen;
Fig. 6 is duct piece specimen A-1 circumferential weld contact-making surface schematic diagram (by duct piece specimen B-1 side);
Fig. 7 is duct piece specimen A-1 circumferential weld contact-making surface schematic diagram (by duct piece specimen B-2 side);
Fig. 8 is duct piece specimen A-1 longitudinal joint contact-making surface schematic diagram;
Fig. 9 is duct piece specimen A-1 intrados schematic diagram;
Figure 10 is duct piece specimen A-2 circumferential weld contact-making surface schematic diagram (by duct piece specimen B-1 side);
Figure 11 is duct piece specimen A-2 circumferential weld contact-making surface schematic diagram (by duct piece specimen B-2 side);
Figure 12 is duct piece specimen A-2 longitudinal joint contact-making surface schematic diagram;
Figure 13 is duct piece specimen A-2 intrados schematic diagram;
Figure 14 is duct piece specimen B-1 circumferential weld contact-making surface schematic diagram;
Figure 15 is duct piece specimen B-1 intrados schematic diagram;
Figure 16 is duct piece specimen B-1 side view;
Figure 17 is duct piece specimen B-2 circumferential weld contact-making surface schematic diagram;
Figure 18 is duct piece specimen B-2 intrados schematic diagram;
Figure 19 is duct piece specimen B-2 side view.
In figure, aqua storage tank with rule of 1-duct piece specimen, 101-duct piece specimen A-1,102-duct piece specimen A-2,103-duct piece specimen B-1,104-duct piece specimen B-2,2-supply tank, 3-hydraulic press, 4-valve, 5-, 6-water pressure gauge, 7-framework, 8-X are to loading actuator, 9-Y to loading actuator, 10-Z to loading actuator, 11-digital single-lens reflex camera, 12-photograph lamp box.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system, its structure as shown in Figure 1, mainly comprise the duct piece specimen 1 for the test of circumferential weld anti-permeability performance, Water hydraulic static pressure loading assembly, mainly comprise supply tank 2, hydraulic press 3, water pressure gauge 6, valve 4 and the aqua storage tank with rule 5, Water hydraulic static pressure loading assembly and framework 7 have formed section of jurisdiction charging assembly jointly, as in Figure 2-4. Observational record assembly, mainly comprises laser displacement sensor and Digital Close-range Photogrammetry equipment. Next, above-mentioned each assembly is described in further detail again.
The concrete structure of duct piece specimen 1 is as shown in Fig. 5-19, duct piece specimen 1 is mainly made up of the large class in two of HeBXing sections of jurisdiction, A type section of jurisdiction, wherein, A type section of jurisdiction is made up of duct piece specimen A-1101, duct piece specimen A-2102, and Type B section of jurisdiction is made up of duct piece specimen B-1103, duct piece specimen B-2104.
Duct piece specimen A-1101, duct piece specimen A-2102 link together by the curved bolt of hoop, between the interface of two test sections of jurisdiction, form longitudinal joint, and section of jurisdiction has longitudinal groove on corresponding contact face, is provided with a circle elastic sealing gasket in longitudinal joint; Duct piece specimen B-1103, duct piece specimen B-2104 and A type section of jurisdiction link together by longitudinal tiltedly bolt, and and the interface of A type section of jurisdiction between form circumferential weld, section of jurisdiction has hoop groove on corresponding contact-making surface, is provided with a circle elastic sealing gasket in circumferential weld; The inner ring of described elastic sealing gasket surrounds a hydraulic pressure chamber, and duct piece specimen B-1103, duct piece specimen B-2104 are provided with water filling duct and are connected with hydraulic pressure chamber, and water filling duct is connected with Water hydraulic static pressure loading assembly.
In Water hydraulic static pressure loading assembly, supply tank 2 is connected with hydraulic press 3 by water pipe, for hydraulic press 3 provides input water; Valve 4 one sides are connected with hydraulic press 3, and opposite side is connected with the aqua storage tank 5 with rule; Aqua storage tank 5 with rule is connected with section of jurisdiction assembly by water pipe; Wherein water pipe, being reserved with bolt hole near section of jurisdiction assembly one side, is connected with water pressure gauge 6 by this bolt hole.
The lower surface of the back timber of framework 7 is provided with the laser displacement sensor of displacement, the amount of opening and open-angle for monitoring section of jurisdiction, the signal output part of laser displacement sensor is connected with the displacement signal input of data collecting system, and the control output end of loading control loads respectively the control input end of actuator 9 and Z-direction and load the corresponding connection in control input end of actuator 10 to the control input end, Y-direction that load actuator 8 with X. Laser displacement sensor adopts triangulation to measure displacement, and precision is high. Digital Close-range Photogrammetry equipment is made up of two high pixel digital single-lens reflex cameras 11, tripod and four photograph lamp boxes 12, adopt high speed digital photographic technology record infiltration phenomenon and infiltration orientation, the collection of high speed digital photographing not only can capture the overall process that percolating water occurs, can also observe the details that naked eyes can not observe by comparative analysis, accurate recording Longitudinal Joint between Segments stress deformation opens the destructive process of seepage flow.
The present invention in use, after shield tunnel circumferential weld anti-permeability performance experimental rig is installed, load upper connecting rod by two Z-directions, two Z-directions load lower link, 1 Z-direction loads actuator and forms the longitudinal axis direction load application of self-balancing reaction frame along lining segment, simulate the longitudinal load that actual shield tunnel lining segment is subject to, load top actuator by 1 Y-direction, Y-direction load distribution beam is equally assigned into two vertical uniform load q in middle section of jurisdiction (A type section of jurisdiction) by vertical force, section of jurisdiction (A type section of jurisdiction) and section of jurisdiction, both sides (duct piece specimen B-1103 in the middle of promoting, duct piece specimen B-2104) there is the changing of the relative positions of certain value, make to produce at circumferential weld place a known controlled shearing force, and longitudinal joint is exerted pressure to loading actuator by 4 X, make seam in impaction state, and apply subsystem by hydraulic pressure and pressurize to section of jurisdiction circumferential weld water filling, thereby form with airtight pressure water space in circumferential weld contact-making surface, the seam displacement of measuring in conjunction with laser displacement sensor, the changing value of the amount of opening and open-angle, application digital single-lens reflex camera records the dynamic real-time status of loading procedure, determine the shield tunnel circumferential weld difference amount of opening with this, waterproof ability under the operating mode such as magnitude of misalignment and open-angle.
Claims (9)
1. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system, is characterized in that, this pilot system comprises:
For the duct piece specimen of circumferential weld anti-permeability performance test, be positioned at framework,
Water hydraulic static pressure loading assembly, comprises the supply tank, hydraulic press and the aqua storage tank with rule that connect successively through water pipe,
Observational record sub-component, comprises laser displacement sensor and Digital Close-range Photogrammetry equipment.
2. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 1, is characterized in that, described duct piece specimen is constituted by JiBXing section of jurisdiction, A type section of jurisdiction,
Described A type section of jurisdiction, by consisting of curved bolted two sections of jurisdiction of hoop, forms longitudinal joint between the interface of two sections of jurisdiction, and section of jurisdiction has longitudinal groove on corresponding contact face, is provided with a circle elastic sealing gasket in longitudinal joint,
Described Type B section of jurisdiction is two sections of jurisdiction that are connected to both sides, A type section of jurisdiction by longitudinally oblique bolt, forms circumferential weld between interface, and section of jurisdiction has hoop groove on corresponding contact-making surface, is provided with a circle elastic sealing gasket in circumferential weld; The inner ring of this elastic sealing gasket surrounds a hydraulic pressure chamber.
3. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 2, is characterized in that, described Type B section of jurisdiction is provided with the water filling duct with Water hydraulic static pressure loading assembly UNICOM.
4. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 3, is characterized in that, described water filling duct is embedded in inside, Type B section of jurisdiction, on the extrados of section of jurisdiction, is connected as press water water inlet with Water hydraulic static pressure loading assembly by bolt hole.
5. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 2, it is characterized in that, described duct piece specimen arranges respectively hoop groove and longitudinal groove and pastes elastic sealing gasket on circumferential weld and longitudinal joint contact-making surface, forms airtight pressure water action space.
6. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 1, it is characterized in that, water pipe between described hydraulic press and the aqua storage tank with rule is provided with valve, and water pipe, being reserved with bolt hole near duct piece specimen one side, is connected with water pressure gauge by this bolt hole.
7. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 1, it is characterized in that, described laser displacement sensor is connected to the lower surface of framework back timber, the signal output part of this laser displacement sensor with load the displacement signal input of actuator and be connected, the control output end of described loading actuator respectively with X to loading the control input end of actuator, control input end that Y-direction loads actuator and the corresponding connection in control input end of Z-direction loading actuator.
8. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 7, is characterized in that, described X loads actuator control duct piece specimen and moves upward three sides to loading actuator, Y-direction loading actuator, Z-direction.
9. duct pieces of shield tunnel circumferential weld anti-permeability performance pilot system according to claim 1, is characterized in that, described Digital Close-range Photogrammetry equipment is made up of two high pixel digital single-lens reflex cameras, tripod and four photograph lamp boxes.
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| CN201520739323.2U CN205246284U (en) | 2015-09-23 | 2015-09-23 | Shield tunnel segment ring stitches impervious performance testing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403366A (en) * | 2015-09-23 | 2016-03-16 | 同济大学 | Anti-permeability performance test system for shield tunnel segment circumferential seams |
| CN108195664A (en) * | 2017-12-26 | 2018-06-22 | 上海隧道工程有限公司 | Duct pieces of shield tunnel seam mechanical property multifunction test device |
| CN109540666A (en) * | 2018-11-06 | 2019-03-29 | 宁波用躬科技有限公司 | The simulated loading system and loading method of a kind of soil layer to section of jurisdiction actual loading characteristic |
| CN109616004A (en) * | 2018-12-28 | 2019-04-12 | 中交上海三航科学研究院有限公司 | Submerged tunnel structural model and preparation method thereof and test method |
-
2015
- 2015-09-23 CN CN201520739323.2U patent/CN205246284U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403366A (en) * | 2015-09-23 | 2016-03-16 | 同济大学 | Anti-permeability performance test system for shield tunnel segment circumferential seams |
| CN108195664A (en) * | 2017-12-26 | 2018-06-22 | 上海隧道工程有限公司 | Duct pieces of shield tunnel seam mechanical property multifunction test device |
| CN108195664B (en) * | 2017-12-26 | 2020-09-15 | 上海隧道工程有限公司 | Multifunctional mechanical property testing device for shield tunnel segment joints |
| CN109540666A (en) * | 2018-11-06 | 2019-03-29 | 宁波用躬科技有限公司 | The simulated loading system and loading method of a kind of soil layer to section of jurisdiction actual loading characteristic |
| CN109540666B (en) * | 2018-11-06 | 2021-04-30 | 宁波用躬科技有限公司 | Simulation loading system and method for actual loading characteristics of segments by soil layer |
| CN109616004A (en) * | 2018-12-28 | 2019-04-12 | 中交上海三航科学研究院有限公司 | Submerged tunnel structural model and preparation method thereof and test method |
| CN109616004B (en) * | 2018-12-28 | 2024-04-05 | 中交上海三航科学研究院有限公司 | Underwater tunnel structure model, manufacturing method and testing method thereof |
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