阅读说明：本技术 用于盾构隧道密封垫防水性能测试装置 (Device for testing waterproof performance of sealing gasket of shield tunnel ) 是由 尤小明 杨增强 于 2020-12-31 设计创作，主要内容包括：本发明属于盾构隧道防水技术领域,具体涉及一种用于盾构隧道密封垫防水性能测试装置,包括固定单元和加压单元,固定单元包括弧形块和控制机构,弧形块内开有弧形通槽,弧形通槽的一侧内滑动连接有第一弧形条,另一侧内滑动连接有第二弧形条；第一弧形条上设有第一弧形夹块,第二弧形条上设有第二弧形夹块；控制机构用于控制弧形通槽内的压强；加压单元包括注水机构和固定块,固定块能够密封贴合在第一弧形夹块、第二弧形夹块上；固定块内开有空腔,空腔能与第一弧形夹块与第二弧形夹块的连接处相对。使用本方案,能够很好的模拟密封垫所处环境,有效提高测试结果的准确性。(The invention belongs to the technical field of shield tunnel waterproofing, and particularly relates to a device for testing the waterproofing performance of a shield tunnel sealing gasket, which comprises a fixing unit and a pressurizing unit, wherein the fixing unit comprises an arc-shaped block and a control mechanism, an arc-shaped through groove is formed in the arc-shaped block, a first arc-shaped strip is connected in one side of the arc-shaped through groove in a sliding manner, and a second arc-shaped strip is connected in the other side of the arc-shaped through groove in a; the first arc-shaped strip is provided with a first arc-shaped clamping block, and the second arc-shaped strip is provided with a second arc-shaped clamping block; the control mechanism is used for controlling the pressure in the arc-shaped through groove; the pressurizing unit comprises a water injection mechanism and a fixed block, and the fixed block can be hermetically attached to the first arc-shaped clamping block and the second arc-shaped clamping block; the fixing block is internally provided with a cavity which can be opposite to the joint of the first arc-shaped clamping block and the second arc-shaped clamping block. By using the scheme, the environment where the sealing gasket is located can be well simulated, and the accuracy of a test result is effectively improved.)

1. A be used for shield tunnel sealed waterproof performance testing arrangement that fills up, its characterized in that: the device comprises a fixing unit and a pressurizing unit, wherein the fixing unit comprises an arc-shaped block and a control mechanism, an arc-shaped through groove is formed in the arc-shaped block, a first arc-shaped strip is connected in one side of the arc-shaped through groove in a sliding mode, a second arc-shaped strip is connected in the other side of the arc-shaped through groove in a sliding mode, and a transmission medium is filled in the arc-shaped through groove; the first arc-shaped strip is provided with a first arc-shaped clamping block, the second arc-shaped strip is provided with a second arc-shaped clamping block, and the arc-shaped block, the first arc-shaped strip, the first arc-shaped clamping block, the second arc-shaped strip and the second arc-shaped clamping block are all in the same circle center; the control mechanism is used for controlling the pressure in the arc-shaped through groove; the pressurizing unit comprises a water injection mechanism and a fixed block, and the fixed block can be hermetically attached to the first arc-shaped clamping block and the second arc-shaped clamping block; a cavity is formed in the fixed block and can be opposite to the joint of the first arc-shaped clamping block and the second arc-shaped clamping block; the water injection mechanism comprises a water storage tank, a water service pipe and a liquid pump installed on the water service pipe, one end of the water service pipe is communicated with the water storage tank, and the other end of the water service pipe is communicated with the cavity.

2. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 1, characterized in that: control mechanism includes the plunger of sliding connection on the arc piece and the driving piece that the drive plunger removed, and one side of plunger can stretch into the arc and lead to the groove in.

3. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 2, characterized in that: the driving part is a cylinder or a hydraulic cylinder.

4. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 3, characterized in that: the rotating unit comprises a rotating shaft and a motor for driving the rotating shaft to rotate, and the rotating shaft and the arc-shaped block are concentric; the arc-shaped block is provided with a connecting rod which is fixed on the rotating shaft; fixed block and driving piece all with arc piece fixed connection.

5. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 4, characterized in that: the pressurizing unit further comprises a grouting mechanism, the grouting mechanism comprises a slurry storage box, a grouting pipe and a grouting pump arranged on the grouting pipe, one end of the grouting pipe is communicated with the slurry storage box, and the other end of the grouting pipe is communicated with the cavity.

6. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 5, characterized in that: and one side of the fixing block, which faces the first arc-shaped clamping block and the second arc-shaped clamping block, is provided with a sealing layer.

7. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 6, characterized in that: the fixed block is connected with an exhaust pipe communicated with the cavity, and the exhaust pipe is provided with a valve.

8. The device for testing the waterproof performance of the sealing gasket of the shield tunnel according to claim 1, characterized in that: a first pressure gauge for testing the pressure in the arc through groove is arranged on the arc block; and a second pressure gauge for testing the pressure in the cavity is arranged on the fixed block.

Technical Field

The invention belongs to the technical field of shield tunnel waterproofing, and particularly relates to a device for testing the waterproofing performance of a shield tunnel sealing gasket.

Background

The shield method is a fully mechanical construction method in the construction of the subsurface excavation method, which is a mechanical construction method for pushing a shield machine in the ground, preventing collapse into a tunnel by using a shield shell and duct pieces to support surrounding rocks around, excavating a soil body in front of an excavation surface by using a cutting device, transporting out of the tunnel by using an unearthing machine, pressing and jacking at the rear part by using a jack, and assembling precast concrete duct pieces to form a tunnel structure. The segment joint is a weak link of the shield tunnel lining, the tunnel load is constantly changed from the construction period to the operation period in the face of complex geological and hydrological environments, the joint is in a complex deformation state, and the waterproof capacity of the joint is an important index for ensuring the safety and normal work of the tunnel.

The shield tunnel adopts sealed the pad that EPDM rubber made to seal to carry on waterproofly more, and the test to the sealed waterproof performance of pad of shield tunnel usually carries out with the help of test device at present, and this test device includes briquetting, lower briquetting and water injection mechanism, all opens annular draw-in groove and the aqua storage tank that is arranged in the draw-in groove on last briquetting and the lower briquetting, goes out the aqua storage tank and can communicate with the draw-in groove. When the waterproof performance of the sealing gasket is tested, the sealing gasket is placed in the clamping groove, the upper pressing block and the lower pressing block are pressed and fixed, water is injected into the water storage tank by the water injection mechanism, the pressure in the water outlet tank is controlled within a required range, the water is kept for a period of time, and the waterproof performance of the sealing gasket is determined by observing whether water is discharged or not. The device for testing the waterproof performance of the sealing gasket has the following defects: 1) the environment of the sealing gasket cannot be well simulated, and the accuracy of the measured result needs to be improved; 2) the operation is troublesome when the sealing gasket is fixed.

Disclosure of Invention

The invention aims to provide a device for testing the waterproof performance of a sealing gasket of a shield tunnel, and aims to solve the problem that the existing testing device cannot well simulate the environment of the sealing gasket, so that the testing result is not accurate enough.

In order to achieve the purpose, the scheme of the invention is as follows: the device for testing the waterproof performance of the sealing gasket of the shield tunnel comprises a fixing unit and a pressurizing unit, wherein the fixing unit comprises an arc-shaped block and a control mechanism, an arc-shaped through groove is formed in the arc-shaped block, a first arc-shaped strip is slidably connected to one side of the arc-shaped through groove, a second arc-shaped strip is slidably connected to the other side of the arc-shaped through groove, and a transmission medium is filled in the arc-shaped through groove; the first arc-shaped strip is provided with a first arc-shaped clamping block, the second arc-shaped strip is provided with a second arc-shaped clamping block, and the arc-shaped block, the first arc-shaped strip, the first arc-shaped clamping block, the second arc-shaped strip and the second arc-shaped clamping block are all in the same circle center; the control mechanism is used for controlling the pressure in the arc-shaped through groove; the pressurizing unit comprises a water injection mechanism and a fixed block, and the fixed block can be hermetically attached to the first arc-shaped clamping block and the second arc-shaped clamping block; a cavity is formed in the fixed block and can be opposite to the joint of the first arc-shaped clamping block and the second arc-shaped clamping block; the water injection mechanism comprises a water storage tank, a water service pipe and a liquid pump installed on the water service pipe, one end of the water service pipe is communicated with the water storage tank, and the other end of the water service pipe is communicated with the cavity.

The working principle of the scheme is as follows:

when the waterproof performance of the sealing gasket needs to be tested, the control mechanism is operated, the pressure in the arc-shaped through groove is reduced, the first arc-shaped strip and the second arc-shaped strip are made to move towards one side of the arc-shaped block, and when the sealing gasket can be placed in the distance between the first arc-shaped clamping block and the second arc-shaped clamping block, the control mechanism is stopped. The sealing gasket is placed at a proper position between the first arc-shaped clamping block and the second arc-shaped clamping block, and the sealing gasket is ensured to be positioned on the same arc-shaped surface with the first arc-shaped clamping block and the second arc-shaped clamping block. And operating the control mechanism again to increase the pressure in the arc-shaped through groove, so that the first arc-shaped clamping block and the second arc-shaped clamping block move towards one side of the sealing gasket, and clamping the sealing gasket by using the first arc-shaped clamping block and the second arc-shaped clamping block. The liquid pump is operated, and water in the storage water tank is conveyed into the cavity, the pressure in the cavity is controlled at a certain value and kept for a period of time, whether water seepage exists at the contact position of the sealing gasket and the first arc-shaped clamping block and the sealing gasket and the second arc-shaped clamping block or not is observed, and the waterproof performance of the sealing gasket used in the shield tunnel can be known.

The working principle and the beneficial effects of the scheme are as follows:

1. in this scheme, set up structures such as arc piece, first arc clamp splice, second arc clamp splice, the sealed condition of filling up in the shield tunnel of accurate simulation, compare in other testing arrangement, can be more accurate measure the waterproof performance of sealed pad in the shield tunnel.

2. The control mechanism is operated when the sealing gasket is taken out and fixed, the control mechanism drives the first arc-shaped clamping block and the second arc-shaped clamping block to move simultaneously, and the sealing gasket is very convenient to detach and install.

3. Under the influence of temperature, the lining of the shield tunnel may expand or contract, so that the pressure between the lining and the sealing gasket is changed, and the waterproof performance of the sealing gasket in different stress states can be more accurately determined to test the waterproof performance of the sealing gasket. In this scheme, the distance between first arc clamp splice and the second arc clamp splice is controllable adjustable, through the distance between first arc clamp splice and the second arc clamp splice of control, can test sealed waterproof nature under the different atress circumstances of filling up, and the test is more comprehensive, and the conclusion that obtains is more concrete, accurate.

Optionally, the control mechanism comprises a plunger slidably connected to the arc block and a driving member for driving the plunger to move, and one side of the plunger can extend into the arc through groove. When the pressure in the arc-shaped through groove needs to be increased, the driving piece is operated, the plunger extends into one side of the arc-shaped through groove, the plunger extrudes a transmission medium in the arc-shaped through groove, and the transmission medium drives the first arc-shaped clamping block and the second arc-shaped clamping block to move towards one side of the arc-shaped block. When the pressure in the arc-shaped through groove needs to be reduced, the driving piece is operated, the plunger moves towards one side away from the arc-shaped through groove, the size in the arc-shaped through groove is increased, the pressure is reduced, and under the action of pressure difference, the first arc-shaped clamping block and the second arc-shaped clamping block move towards one side of the arc-shaped block.

Optionally, the drive member is a pneumatic or hydraulic cylinder. The air cylinder or the hydraulic cylinder can effectively drive the plunger to move, and the actual use requirements can be better met.

Optionally, the device further comprises a rotating unit, wherein the rotating unit comprises a rotating shaft and a motor for driving the rotating shaft to rotate, and the rotating shaft is concentric with the arc-shaped block; the arc-shaped block is provided with a connecting rod which is fixed on the rotating shaft; fixed block and driving piece all with arc piece fixed connection. In the shield tunnel, the position that sealed pad was located probably sets up the rotation unit in each position such as the upside, downside, left side, right side in the shield tunnel, drives the pivot through the motor and rotates, can change the position of arc piece, makes sealed pad on the arc piece be in the optional position on the circumference, can simulate the waterproof performance of test sealed pad when arbitrary position.

Optionally, the pressurizing unit further comprises a grouting mechanism, the grouting mechanism comprises a slurry storage box, a grouting pipe and a grouting pump installed on the grouting pipe, one end of the grouting pipe is communicated with the slurry storage box, and the other end of the grouting pipe is communicated with the cavity. Still set up slip casting mechanism in this scheme, the storage thick liquid incasement has deposited the concrete, at the in-process of the sealed waterproof performance of gasket of test, except that leading to water toward the cavity, the operation grouting pump carries the concrete in the storage thick liquid incasement in the cavity, makes the mixture of concrete and water have been deposited in the cavity. This scheme is when sealed waterproof performance test of filling up, has still considered concrete and sealed the pad to take place to contact and to sealed the influence that produces the erosion action of filling up, makes this test more be close sealed the sealed actual use operating mode that fills up, and the data that obtains are more accurate.

Optionally, one side of the fixing block, which faces the first arc-shaped clamping block and the second arc-shaped clamping block, is provided with a sealing layer. The sealing layer is arranged to enable the fixing block to be in better sealing fit with the first arc-shaped clamping block and the second arc-shaped clamping block, and materials in the cavity are prevented from being discharged from gaps between the fixing block and the first arc-shaped clamping block and between the fixing block and the second arc-shaped clamping block.

Optionally, the fixed block is connected with an exhaust pipe communicated with the cavity, and the exhaust pipe is provided with a valve. The exhaust pipe is arranged, when water and concrete are introduced into the cavity, the valve is opened, redundant gas in the cavity is discharged, and the water and the concrete can be normally injected into the cavity.

Optionally, a first pressure gauge for testing the pressure in the arc-shaped through groove is mounted on the arc-shaped block; and a second pressure gauge for testing the pressure in the cavity is arranged on the fixed block. The pressure in the arc-shaped through groove and the cavity can be read at any time by arranging the first pressure gauge and the second pressure gauge, and the pressure in the arc-shaped through groove and the cavity can be controlled within a required range.

Drawings

Fig. 1 is a sectional view in a front view direction of the device for testing the waterproof performance of the shield tunnel gasket according to the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an arc-shaped block 10, an arc-shaped through groove 11, a first arc-shaped strip 12, a first arc-shaped clamping block 13, a second arc-shaped strip 14, a second arc-shaped clamping block 15, a driving piece 20, a plunger 21, a sealing gasket 30, a rotating shaft 40, a connecting rod 41, a fixing block 50, an exhaust pipe 51, a valve 52, a second pressure gauge 53, a cavity 54, a water storage tank 60, a water pipe 61, a liquid pump 62, a slurry storage tank 70, a slurry injection pipe 71, a slurry injection pump 72 and a first pressure gauge 80.

This embodiment is substantially as shown in fig. 1: a waterproof performance testing arrangement for shield tunnel sealing gasket, including frame, rotation unit, fixed unit and pressurization unit, fixed unit includes arc piece 10 and control mechanism, has seted up the arc in the arc piece 10 and has led to groove 11, and the arc leads to and slides and sealing connection has first arc strip 12 in one side of groove 11, and the arc leads to and slides and sealing connection has second arc strip 14 in the opposite side of groove 11. The arc-shaped through groove 11 is filled with a transmission medium between the first arc-shaped strip 12 and the second arc-shaped strip 14, and in this embodiment, the transmission medium is hydraulic oil. The arc-shaped block 10 is provided with a first pressure gauge 80 for testing the pressure in the arc-shaped through groove 11. First arc clamp 13 is welded on one side of arc piece 10 is kept away from to first arc strip 12, and second arc clamp 15 is welded on one side of arc piece 10 is kept away from to second arc strip 14, and arc piece 10, first arc strip 12, first arc clamp 13, second arc strip 14 and the same centre of a circle of second arc clamp 15 all.

The control mechanism is used for controlling the pressure in the arc-shaped through groove 11, the control mechanism comprises a plunger 21 and a driving part 20 fixedly installed on the arc-shaped block 10, and the driving part 20 is fixedly installed on the arc-shaped block 10 through an installation frame. The plunger 21 is connected on the arc-shaped block 10 in a sliding and sealing mode, and one side of the plunger 21 can extend into the arc-shaped through groove 11. The drive member 20 may be a pneumatic or hydraulic cylinder, in this embodiment the drive member 20 is a hydraulic cylinder, the piston rod of which is welded to the plunger 21.

The pressurizing unit comprises a water injection mechanism, a grouting mechanism and a fixing block 50 fixedly installed on the arc-shaped block 10, and the fixing block 50 is integrally connected with the arc-shaped block 10 through a support. The fixing block 50 can be attached to the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15 in a sealing mode, and a sealing layer is pasted on one side, facing the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15, of the fixing block 50. The fixed block 50 is provided with a cavity 54, and the cavity 54 can be opposite to the joint of the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15. The fixed block 50 is connected with an exhaust pipe 51 communicated with the cavity 54, and the exhaust pipe 51 is provided with a valve 52; a second pressure gauge 53 for measuring the pressure in the cavity 54 is also mounted on the fixed block 50. The water injection mechanism comprises a water storage tank 60, a water pipe 61 and a liquid pump 62, wherein one end of the water pipe 61 is communicated with the water storage tank 60, and the other end of the water pipe 61 is communicated with the cavity 54; a liquid pump 62 is mounted on the water pipe 61, and the liquid pump 62 is operated to feed water in the water storage tank 60 into the cavity 54. The grouting mechanism comprises a grout storage tank 70, a grouting pipe 71 and a grouting pump 72, wherein one end of the grouting pipe 71 is communicated with the grout storage tank 70, and the other end of the grouting pipe 71 is communicated with the cavity 54; an injection pump 72 is mounted on the injection pipe 71, and the injection pump 72 is operated to deliver the concrete in the storage box 70 into the cavity 54. The water storage tank 60 and the pulp storage tank 70 are both fixedly mounted on the arc-shaped block 10 through mounting racks, and the arc-shaped block 10 can drive the water storage tank 60 and the pulp storage tank 70 to move together when moving.

The rotating unit comprises a rotating shaft 40 and a motor fixedly installed on the rack, one end of the rotating shaft 40 is welded with an output shaft of the motor, the other end of the rotating shaft 40 is rotatably connected to the rack, and the rotating shaft 40 is concentric with the arc-shaped block 10. The arc-shaped block 10 is welded with a connecting rod 41, the connecting rod 41 is welded on the rotating shaft 40, and the rotating shaft 40 drives the arc-shaped block 10 to rotate together through the connecting rod 41 when rotating.

When the waterproof performance of the sealing gasket 30 needs to be tested, the hydraulic cylinder is operated, the plunger 21 moves towards one side away from the arc-shaped through groove 11, the pressure in the arc-shaped through groove 11 is reduced, the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15 all move towards one side of the arc-shaped block 10, and when the distance between the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15 can be used for placing the sealing gasket 30, the hydraulic cylinder is stopped to operate. The sealing gasket 30 is placed at a proper position between the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15, and the sealing gasket 30 is ensured to be positioned on the same arc-shaped surface with the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15. The hydraulic cylinder is operated again, so that the plunger 21 extends into one side of the arc-shaped through groove 11, the plunger 21 extrudes hydraulic oil in the arc-shaped through groove 11, the hydraulic oil drives the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15 to move towards one side far away from the arc-shaped block 10, and the first arc-shaped clamping block 13 and the second arc-shaped clamping block 15 are used for clamping the sealing gasket 30. The liquid pump 62 and the grouting pump 72 are operated, water and concrete are injected into the cavity 54, the pressure in the cavity 54 is controlled at a certain value and kept for a period of time, and whether water leaks at the contact positions of the sealing gasket 30 and the first arc-shaped clamping block 13 and the sealing gasket 30 and the second arc-shaped clamping block 15 is observed. When the position of the sealing gasket 30 on the arc-shaped block 10 needs to be changed, the motor is started, the rotating shaft 40 is driven to rotate through the motor, the positions of the arc-shaped block 10, the sealing gasket 30, the fixing block 50 and other components are changed, and the waterproof performance of the sealing gasket 30 in any position can be tested in a simulated mode.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.