CN216926495U - Leakage detection test device for shield concrete segment - Google Patents
Leakage detection test device for shield concrete segment Download PDFInfo
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- CN216926495U CN216926495U CN202220206661.XU CN202220206661U CN216926495U CN 216926495 U CN216926495 U CN 216926495U CN 202220206661 U CN202220206661 U CN 202220206661U CN 216926495 U CN216926495 U CN 216926495U
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Abstract
A kind of shield constructs the concrete segment leak hunting pilot unit, relate to the test unit field of the performance of the segment, including the rigid supporting platform of arc, the foot brace connected to lower surface of the supporting platform, and upper compression bar, lower compression bar used for fixing the segment, the lower compression bar is welded in the bottom of supporting platform, the upper compression bar, lower compression bar are arranged along the upper and lower surface of the monoblock segment at the same interval, and fix the segment on supporting platform through the tie bolt, there are a round of concave grooves on the supporting platform, install the rubber ring in the concave groove, the segment bottom area sealed by the rubber ring forms the sealed chamber to be detected, the supporting platform is connected with force application pump through the pressure pipe; the cross sections of the upper pressure rod and the lower pressure rod are square, the contact area between the upper pressure rod and the duct piece is large, the duct piece is good in integrity and uniform in stress, and the duct piece is not easy to crush; the rubber ring is firmly attached to the duct piece, so that the water pressure on the duct piece is stable, the obtained test data is more accurate, and the method is simple to operate, high in test efficiency and suitable for duct pieces with different diameters.
Description
Technical Field
The utility model relates to the field of test devices for the performance of precast concrete lining segments, in particular to a shield concrete segment leakage test device.
Background
With the continuous expansion of the scale of high-speed railway construction and subway construction in China, the traffic and transportation industry in China enters a brand-new page. A large number of shield segments are applied to high-speed railway construction and subway tunnels, the leakage resistance of the shield segments influences the normal operation of subway lines, and the segments used for actual engineering need to be subjected to a permeability test according to a product standard (GB/T22082-. When carrying out leak hunting test, on fixing the section of jurisdiction to anchor clamps, start the booster pump and pressurize in grades, reach the pressure value of settlement after, every grade constant voltage 10min to whether the inspection section of jurisdiction has the seepage phenomenon simultaneously, until pressurizeing to design anti-seepage pressure, constant voltage 2 h. Therefore, the duct piece can be firmly fixed on the clamp, and the key of the accuracy of test data is to keep the pressure constant during the test.
The utility model with the publication number of CN211740931U discloses a bending-resistant leakage performance test device for precast concrete lining segments, which comprises a set of upper positioning plate and a set of lower positioning plate for fastening and fixing segments, wherein the upper positioning plate and the lower positioning plate are fixedly connected by means of the matching of fastening screws and fastening nuts, and an elastic ring is fixed between the segments and an arc-shaped fixing plate, but the contact areas between the upper positioning plate and the segments and between the lower positioning plate and the segments are small, the stress is not uniform, and the segments are easy to crush; the upper positioning plate and the lower positioning plate need to be adjusted at the same time, and the duct piece is fixed by screwing the fastening screw rod and the fastening nut, so that the operation is inconvenient; and the elastic ring is only fixed on the upper surface of the arc-shaped fixing plate, so that the elastic ring is easy to move laterally in the test pressurizing process, the pressure is unstable during the test, and accurate data of the anti-leakage performance of the duct piece can not be obtained.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the utility model provides a shield constructs concrete segment leak hunting test device to solve the operation that current testing arrangement exists inconvenient, section of jurisdiction atress inhomogeneous, easily by crushing, the easy lateral shifting of elastic ring in the experimental pressurization process in addition leads to pressure unstable, can't obtain the problem of the accurate data of section of jurisdiction anti-leakage performance.
The technical scheme for solving the technical problems is as follows: a leakage detection test device for a shield concrete duct piece comprises an arc rigid supporting platform with an upward opening, a foot support connected to the lower surface of the supporting platform, an upper pressure rod and a lower pressure rod, wherein the upper pressure rod and the lower pressure rod are used for fixing the duct piece; the upper pressure rod and the lower pressure rod are square pipes, the lower pressure rod is welded at the bottom of the supporting platform, the upper pressure rod and the lower pressure rod fix the duct piece on the supporting platform through a pull rod bolt, a circle of concave groove is further formed in the middle of the supporting platform, a rubber ring in sealing fit with the bottom of the duct piece is installed in the concave groove, and a sealing cavity to be detected is formed in the bottom area of the duct piece sealed by the rubber ring.
The further technical scheme of the utility model is as follows: the outer length L =80 ~ 120mm of cross section of upper pressure bar, lower pressure bar, outer width K =80 ~ 120mm, the both ends of upper pressure bar, lower pressure bar end cap, and both ends reserve has the bolt hole with draw bar bolt matched with.
The further technical scheme of the utility model is as follows: the rubber ring is a double-groove rubber ring with grooves formed in the upper surface and the lower surface.
The further technical scheme of the utility model is as follows: the supporting platform is a Q235 steel plate with the thickness of 5-15 mm.
The utility model has the further technical scheme that: and a round hole communicated with the sealing cavity is formed in the supporting platform, and a quick connector for mounting a pressure pipe is fixed at the round hole.
The utility model has the further technical scheme that: the number of the round holes is 2-6, and the 2-6 round holes are uniformly distributed on the supporting platform.
Due to the adoption of the structure, compared with the prior art, the leakage detection test device for the shield concrete pipe sheet has the following beneficial effects:
1. the integrity of the duct piece is good, and the stress is uniform
The leakage detection test device for the structural concrete duct piece comprises an arc-shaped rigid supporting platform with an upward opening, a foot support connected to the lower surface of the supporting platform, an upper pressure rod and a lower pressure rod, wherein the upper pressure rod and the lower pressure rod are used for fixing the duct piece, the upper pressure rod and the lower pressure rod are respectively provided with a plurality of pressure rods, and the plurality of pressure rods are respectively arranged along the upper surface and the lower surface of the whole duct piece at equal intervals of 100-200 mm; the upper pressure rod and the lower pressure rod are square pipes, and the cross sections of the upper pressure rod and the lower pressure rod are square, so that compared with the existing upper positioning plate and lower positioning plate with rectangular cross sections, the contact area between the upper pressure rod and the duct piece is large, the duct piece is uniformly stressed and is not easily crushed; and the lower pressing rod is welded at the bottom of the supporting platform, the upper pressing rod and the lower pressing rod fix the duct piece on the supporting platform through the pull rod bolt, and the duct piece is good in integrity and uniform in stress.
2. Pressure stability and more accurate test data
The middle part of the supporting platform is also provided with a circle of concave grooves, the concave grooves are internally provided with rubber rings which are in sealing fit with the bottom of the duct piece, the bottom area of the duct piece sealed by the rubber rings forms a sealing cavity to be detected, the rubber rings are firmly attached to the duct piece in the test pressurization process and are not easy to move laterally, the water pressure on the duct piece is stable in constant pressure, and the obtained data of the anti-leakage performance of the duct piece is more accurate;
the rubber ring adopts a double-groove rubber ring with grooves on the upper surface and the lower surface, after the duct piece is placed on the supporting platform, the upper groove part and the lower groove part of the double-groove rubber ring are spread towards two sides and tightly pressed on the contact surface, the double-groove rubber ring can bear larger sealing pressure, and the double-groove rubber ring is firmly attached to the duct piece along with the increase of water pressure, so that the stability of the water pressure during the test is ensured, and the interference of experimental data due to the factors of the double-groove rubber ring is avoided;
in addition, the supporting platform is provided with 2-6 round holes communicated with the sealing cavity, the 2-6 round holes are uniformly distributed on the supporting platform, and injected water is dispersed into the sealing cavity from the round holes during testing, so that the water pressure on the pipe piece in the detected area is more balanced and stable.
3. Simple operation and high efficiency
The plurality of upper pressure rods and the plurality of lower pressure rods are respectively arranged along the upper surface and the lower surface of the whole piece of duct piece at equal intervals of 100-200 mm, wherein the lower pressure rods are welded at the bottom of the supporting platform;
and moreover, the supporting platform is also provided with a round hole communicated with the sealing cavity, a quick connector for mounting a pressure pipe is fixed at the round hole, and the round hole can be rapidly connected with a pressure pump through the quick connector, so that the device is very simple to operate, and the test efficiency is obviously improved.
4. Duct piece suitable for different diameters
The supporting platform provided by the utility model adopts a Q235 steel plate with the thickness of 5-15 mm, the Q235 steel plate has certain rigidity and certain flexibility, the Q235 steel plate is matched with the upper pressure rod and the lower pressure rod, the problem of fitting with duct pieces with different diameters is solved, and the device is wide in application range.
Drawings
FIG. 1 is a front cross-sectional view of a support platform with a tube sheet positioned thereon according to one embodiment;
FIGS. 2 to 3 are schematic structural views of a support platform welded with a lower compression bar according to the first embodiment;
FIG. 2 is a front view, and FIG. 3 is a plan view;
FIGS. 4 to 5 are schematic structural views of the upper pressing rod and the lower pressing rod according to the first embodiment;
FIG. 4 is a sectional view taken along line A-A of FIG. 5, and FIG. 5 is a front view;
FIG. 6 is a schematic structural view of a stay bolt according to the first embodiment;
FIG. 7 is a schematic structural view of a double-groove rubber ring according to the first embodiment;
FIG. 8 is a schematic view of the support platform of the first embodiment in connection with a booster pump;
in the figure:
1-supporting platform, 11-concave groove, 12-double-groove rubber ring, 13-round hole,
2-foot support, 3-upper pressure rod, 4-lower pressure rod, 5-pull rod bolt, 6-pressure pipe, 7-pressure pump and 8-pipe piece.
Detailed Description
Example one
As shown in fig. 1 to 7, a leakage test device for a shield concrete segment comprises an arc rigid supporting platform 1 with an upward opening, a foot support 2 connected to the lower surface of the supporting platform 1, and an upper pressure bar 3 and a lower pressure bar 4 for fixing the segment 8, wherein the upper pressure bar 3 and the lower pressure bar 4 are respectively provided with a plurality of pieces, and the plurality of upper pressure bars 3 and the plurality of lower pressure bars 4 are respectively arranged along the upper surface and the lower surface of the whole segment 8 at equal intervals of 100 to 200 mm; the upper pressure rod 3 and the lower pressure rod 4 are square tubes with two end-sealed ends, bolt holes matched with the stay bolts 5 are reserved at two ends, the outer length L of the cross sections of the upper pressure rod 3 and the lower pressure rod 4 is = 80-120 mm, and the outer width K is = 80-120 mm, wherein the lower pressure rod 4 is welded at the bottom of the supporting platform 1, and the segments are fixed on the supporting platform 1 by the upper pressure rod 3 and the lower pressure rod 4 through the stay bolts 5;
a circle of concave groove 11 is further arranged in the middle of the supporting platform 1, a rubber ring which is in sealing fit with the bottom of the duct piece 1 is arranged in the concave groove 11, the rubber ring is a double-groove rubber ring 12 with grooves formed in the upper surface and the lower surface, and a sealing cavity to be detected is formed in the bottom area of the duct piece sealed by the double-groove rubber ring;
the supporting platform is a Q235 steel plate with thickness of 5-15 mm, certain rigidity and certain flexibility, round holes 13 communicated with the sealed cavity are formed in the supporting platform 1, the number of the round holes 13 is 2-6, the 2-6 round holes 13 are uniformly distributed on the supporting platform 1, quick connectors for mounting pressure pipes are fixed at the round holes 13, as shown in fig. 8, the supporting platform is connected with a pressure pump 7 through a pressure pipe 6, the pressure pump is a common prior art, and a pressure test is performed in a duct piece leak detection test according to appendix A of precast concrete lining duct pieces (GB/T22082-2017);
the manufacturing method of the shield concrete pipe sheet leak detection test device comprises the following steps:
1. a Q235 steel plate with the thickness of 10mm, certain rigidity and certain flexibility is adopted to manufacture a supporting platform with the arc radius of 3000 mm;
2. welding 4 foot supports on the lower surface of a supporting platform, selecting a plurality of square pipes with the length of 1400mm and the cross-sectional dimension of 100mm multiplied by 100mm as an upper pressure rod and a lower pressure rod, respectively arranging the upper pressure rod and the lower pressure rod along the upper surface and the lower surface of the whole pipe piece at equal intervals of 150mm, and welding the lower pressure rod on the bottom of the supporting platform;
3. a steel wire rubber ring concave groove with the diameter of 6mm is welded in the middle of the supporting platform, and the double-groove rubber ring is placed in the concave groove;
4. 4 circular holes communicated with the sealing cavity are formed in the supporting platform surrounded by the concave groove, the circular holes are uniformly distributed on the supporting platform, and the circular holes in the bottom of the supporting platform are provided with pressure pipe quick connectors;
5. the pressurizing pump is connected with the pressure pipe through a quick connector.
After the duct piece is placed on the supporting platform, the position of the upper pressure rod is adjusted to be aligned with the lower pressure rod, the upper pressure rod and the lower pressure rod are fastened in sequence from the middle to two ends, clamping of the duct piece is completed, in order to prevent damage to the duct piece when the upper pressure rod is fastened, three rubber strips are arranged on the axis of the inner arc surface of the duct piece during testing, the middle one rubber strip is arranged, the edges of the three rubber strips are arranged, and duct piece leakage testing is conducted according to annex A of precast concrete lining duct piece (GB/T22082-2017).
Claims (6)
1. The utility model provides a shield constructs concrete section of jurisdiction leak hunting test device, includes opening arc rigidity supporting platform (1) up, connects heel brace (2) at supporting platform (1) lower surface and last depression bar (3), depression bar (4) that are used for fixed section of jurisdiction (8), and supporting platform is connected its characterized in that through pressure pipe (6) and force (forcing) pump (7): the upper pressure rods (3) and the lower pressure rods (4) are respectively provided with a plurality of pieces, and the upper pressure rods (3) and the lower pressure rods (4) are respectively arranged along the upper surface and the lower surface of the whole duct piece (8) at equal intervals of 100-200 mm; go up depression bar (3) and depression bar (4) for square pipe down, wherein depression bar (4) welding is in supporting platform (1) bottom down, go up depression bar (3), depression bar (4) are fixed the section of jurisdiction on supporting platform (1) through stay bolt (5) down, the middle part on supporting platform (1) still is provided with round concave groove (11), install in this concave groove (11) with section of jurisdiction (8) bottom seal complex rubber circle, the regional sealed chamber of waiting to detect that forms in section of jurisdiction bottom sealed by the rubber circle.
2. The leak detection test device for the shield concrete pipe piece according to claim 1, characterized in that: the outer length L of the cross sections of the upper pressure rod (3) and the lower pressure rod (4) is = 80-120 mm, the outer width K is = 80-120 mm, the two ends of the upper pressure rod (3) and the lower pressure rod (4) are sealed, and bolt holes matched with the draw bar bolts (5) are reserved at the two ends.
3. The leak detection test device for the shield concrete pipe piece according to claim 1, characterized in that: the rubber ring is a double-groove rubber ring (12) with grooves formed in the upper surface and the lower surface.
4. The leak detection test device for the shield concrete pipe piece according to claim 1, characterized in that: the supporting platform is a Q235 steel plate with the thickness of 5-15 mm.
5. The shield concrete pipe sheet leak detection test device according to claim 1, 2, 3 or 4, characterized in that: and a round hole (13) communicated with the sealing cavity is formed in the supporting platform (1), and a quick connector for mounting a pressure pipe is fixed at the round hole (13).
6. The shield concrete pipe sheet leak detection test device according to claim 5, characterized in that: the number of the round holes (13) is 2-6, and the 2-6 round holes (13) are uniformly distributed on the supporting platform (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220206661.XU CN216926495U (en) | 2022-01-25 | 2022-01-25 | Leakage detection test device for shield concrete segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220206661.XU CN216926495U (en) | 2022-01-25 | 2022-01-25 | Leakage detection test device for shield concrete segment |
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| Publication Number | Publication Date |
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| CN216926495U true CN216926495U (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220206661.XU Active CN216926495U (en) | 2022-01-25 | 2022-01-25 | Leakage detection test device for shield concrete segment |
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| Country | Link |
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| CN (1) | CN216926495U (en) |
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- 2022-01-25 CN CN202220206661.XU patent/CN216926495U/en active Active
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