Waterproof test device and method for shield tunnel segment joint with independently adjustable deformation

Abstract

The application provides a shield tunnel segment joint waterproof test device and method capable of independently adjusting deformation, which comprises a supporting mechanism, a sealing mechanism fixedly connected with the upper surface of the supporting mechanism at the bottom, the sealing mechanism comprising a plurality of test pieces, preset inner and outer joints being formed between the working surfaces of the plurality of test pieces, the test pieces on both sides of the inner and outer joints being respectively provided with inner and outer grooves on the working surfaces, the test pieces on both sides of the inner and outer joints being fixed by bolts, the sealing mechanism being divided into a first sealing mechanism and a second sealing mechanism from inside to outside by pasting inner and outer sealing gaskets, a water pressure loading mechanism, a water inlet mechanism comprising a first water inlet communicated with the water pressure loading mechanism, and a water outlet mechanism for discharging air inside the sealing mechanism through a first water outlet and a water outlet pipeline arranged on the first sealing mechanism. The application has the function of independently adjusting and setting the opening amount and the misalignment amount of the double sealing gaskets.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield tunnel segment waterproofing, in particular to a shield tunnel segment joint waterproofing test device and method capable of independently adjusting deformation. BACKGROUND

[0002] With the continuous development of social economy and engineering construction level, the construction scale and technical indicators of shield tunnels are constantly making new breakthroughs, and the requirements for the waterproofing performance of segment gaskets are also becoming higher and higher. In order to effectively ensure the safety of tunnel operation, it is very important to carry out waterproofing performance tests of segment joint gaskets of shield tunnels.

[0003] The waterproofing performance test of the gasket is mainly to set a certain amount of opening and misalignment of the gasket under the premise of water pressure loading to obtain the waterproofing parameters of the gasket. The existing waterproofing performance test device for the one-seam test and T-seam test of double gaskets mainly obtains the waterproofing parameters by breaking the double gaskets with internal water pressure. However, since the double gaskets to be tested are in the same test plate (or plane), the existing test mostly synchronously applies the same amount of opening and misalignment to the double gaskets, and cannot independently adjust and set the opening and misalignment of each double gasket. The Chinese invention patent with the application number CN107101788A discloses a shield tunnel lining segment T-seam double gasket waterproofing test device and method, which considers the differential setting of the opening of the double gaskets by setting grooves or bosses of different heights in each test block. However, since the double gaskets are in the same test plate (or plane), the device still cannot independently adjust and set the misalignment of each double gasket. In the actual working conditions of tunnel operation, the stress states of segments at different positions are not completely consistent, the inner side of some parts in the tunnel profile is in an opening state relative to the outer side, and the outer side of some parts is in an opening state relative to the inner side. At the same time, due to the different stress states, the relative misalignment between the segments is also inconsistent. Overall, the deformation between the segments presents a spatial state, so the opening and misalignment of the double gaskets are not synchronous and of the same amount. The actual working conditions are that the double gaskets present different deformation states, and the corresponding opening and misalignment are also different.

[0004] At present, the existing test test device does not consider the independent adjustment and setting of the opening and misalignment of the double gaskets. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a shield tunnel segment joint waterproofing test device and method capable of independently adjusting deformation.

[0006] According to one aspect of the present application, there is provided a shield tunnel segment joint waterproof testing device capable of independent deformation adjustment, comprising:

[0007] a supporting mechanism for providing support to the testing device;

[0008] a sealing mechanism, the bottom of which is fixedly connected to the upper surface of the supporting mechanism, the sealing mechanism comprising a plurality of test pieces, the working surfaces of which form a preset shape of inner and outer joints; the test pieces on both sides of the inner joint are provided with an inner groove on the working surface for pasting an inner sealing gasket, the test pieces on both sides of the outer joint are provided with an outer groove on the working surface for pasting an outer sealing gasket, and the test pieces on both sides of the inner and outer joints are fixed by bolts; the sealing mechanism is divided into two independent sealing mechanisms, i.e. a first sealing mechanism and a second sealing mechanism from inside to outside, by pasting the inner and outer sealing gaskets;

[0009] a water pressure loading mechanism for providing water pressure loading to the sealing mechanism;

[0010] a water inlet mechanism comprising a first water inlet provided on the first sealing mechanism, the first water inlet being in communication with the water pressure loading mechanism through a water inlet joint and an external pipeline in sequence;

[0011] a water outlet mechanism comprising a first water outlet provided on the first sealing mechanism, the first water outlet being connected to a water outlet pipeline to discharge the air inside the sealing mechanism through the first water outlet and the water outlet pipeline.

[0012] Further, the sealing mechanism comprises a first bottom plate and an inner cover plate and an outer cover plate respectively covering the first bottom plate, and the outer cover plate covers the inner cover plate at the same time;

[0013] the inner cover plate and the first bottom plate form the inner joint, the outer cover plate and the first bottom plate form the outer joint, and the inner and outer joints are both slit joints; the inner groove is provided on the working surface where the inner cover plate and the first bottom plate are attached to each other, and the outer groove is provided on the working surface where the outer cover plate and the first bottom plate are attached to each other;

[0014] the inner and outer cover plates are both provided with first bolt holes around them, and the inner and outer cover plates are fixedly connected to the first bottom plate by bolts passing through the first bolt holes.

[0015] Further, the outer cover plate is provided with a protruding structure protruding away from the inner cover plate, and the size of the protruding structure is greater than that of the inner cover plate.

[0016] Optionally, the sealing mechanism comprises a second bottom plate and a first outer plate, a second outer plate, a first inner block and a second inner block on the second bottom plate; the first outer plate and the second outer plate are both L-shaped and left-right symmetrical structures, and the first inner block and the second inner block are both triangular prism-shaped and left-right symmetrical structures, and optionally, the first inner block and the second inner block can also be cubic or the like according to different test conditions;

[0017] The first inner block and the second inner block are located between the first outer plate and the second outer plate; the inner joint and the outer joint are formed between the first inner block and the second inner block and between the first outer plate and the second outer plate respectively, and the inner joint and the outer joint contain T-shaped seams; the inner channel is arranged on the working surface of the first inner block and the second inner block, and the outer channel is arranged on the working surface of the first outer plate and the second outer plate;

[0018] The first inner block, the second inner block, the first outer plate and the second outer plate are all provided with second bolt holes, and bolts pass through the second bolt holes to connect the first inner block, the second inner block, the first outer plate and the second outer plate to the second bottom plate respectively, and connect the first inner block and the second inner block and the first outer plate and the second outer plate on the working surfaces of mutual adhesion.

[0019] Further, a triangular prism-shaped space is formed between the first outer plate and the second outer plate, and the volume of the triangular prism-shaped space is greater than the volume of the first inner block and the second inner block after adhesion.

[0020] Further, the water outlet pipeline serves as an exhaust port, and the water outlet pipeline extends upwards to above the sealing mechanism by bypassing the bottom of the sealing mechanism.

[0021] Further, the support mechanism comprises test bench supports at four corners below the sealing mechanism, and the bottom of the test bench support is provided with an adjustable height support corner.

[0022] According to another aspect of the present application, a shield tunnel segment joint waterproof test method capable of independently adjusting deformation is provided, which is realized by using the shield tunnel segment joint waterproof test device capable of independently adjusting deformation, and the method comprises the following steps:

[0023] Connecting the bottom of the sealing mechanism with the upper surface of the support mechanism;

[0024] Pasting the sealing gasket to be tested at the inner channel groove and the outer channel groove on the sealing mechanism test piece;

[0025] Setting the opening amount and the misalignment amount of the inner channel sealing gasket, and fixing the test pieces on both sides of the inner joint by using bolts;

[0026] The opening amount and the misalignment amount of the outer channel sealing gasket are set, and the test pieces on both sides of the outer channel joint are fixed by bolts;

[0027] The water pressure loading mechanism is connected with the first water inlet, and the air inside the sealing mechanism is discharged through the first water outlet and the water outlet pipeline, and then the water outlet pipeline is blocked;

[0028] The water pressure loading mechanism is started, until the outer channel sealing gasket fails to prevent water, the test is completed, and the waterproof performance of the sealing gasket to be tested is obtained.

[0029] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0030] 1. The shield tunnel segment joint waterproof test device and method provided by the present application can realize independent adjustment and setting of the opening amount and the misalignment amount of the inner channel sealing gasket and the outer channel sealing gasket by dividing the sealing mechanism into two independent sealing structures, allowing the sealing mechanism to move freely, and forming the inner channel joint and the outer channel joint of a preset shape between the working surfaces of the multiple test pieces of the sealing mechanism, and by respectively fixing the test pieces on both sides of the inner channel joint and the outer channel joint by bolts.

[0031] 2. The shield tunnel segment joint waterproof test device and method provided by the present application can simultaneously consider the application scenarios of different joints by forming the inner channel joint and the outer channel joint of a preset shape between the working surfaces of the multiple test pieces of the sealing mechanism, so that test research under various working conditions can be carried out, and the waterproof performance of the segment double sealing gasket can be more reasonably analyzed and researched.

[0032] 3. The test device and method of the present application have the characteristics of clear principle, simple device structure and convenient operation. DETAILED DESCRIPTION

[0033] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings:

[0034] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a one-seam test device in an embodiment of the present application;

[0035] Figure 2 FIG. 2 is a side view of a first bottom plate of the one-seam test device in the embodiment of the present application;

[0036] Figure 3 FIG. 3 is a top view of the first bottom plate of the one-seam test device in the embodiment of the present application;

[0037] Figure 4A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0038] Figure 5 A top view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0039] Figure 6 A bottom view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0040] Figure 7 A side view of an outer cover plate of a slot test device according to an embodiment of the present application;

[0041] Figure 8 A top view of an outer cover plate of a slot test device according to an embodiment of the present application;

[0042] Figure 9 A bottom view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0043] Figure 10 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0044] Figure 11 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0045] Figure 12 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0046] Figure 13 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0047] Figure 14 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0048] Figure 15 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0049] Figure 16 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0050] Figure 17 A side view of an inner cover plate of a slot test device according to an embodiment of the present application;

[0051] In the figure: 1 is the outer sealing gasket, 2 is the inner sealing gasket, 3 is the inner cover plate, 4 is the outer cover plate, 5 is the first bottom plate, 5' is the second bottom plate, 6 is the transverse stiffening rib plate, 7 is the longitudinal stiffening rib plate, 8 is the bolt, 9 is the test bench support, 10 is the height-adjustable support angle, 11 is the water inlet joint, 12 is the water outlet pipeline, 13 is the external pipeline, 14 is the water pressure loading mechanism, 15 is the first bottom plate outer channel, 15' is the second bottom plate outer channel, 16 is the first bottom plate inner channel, 16' is the second bottom plate inner channel, 17 is the inner cover plate inner channel, 18 is the first bolt hole, 18' is the second bolt hole, 19 is the outer cover plate outer channel, 20 is the visual window, 21 is the first inner block, 22 is the second inner block, 23 is the first outer plate, 24 is the second outer plate, 25 is the inner block channel, 26 is the outer plate channel, 27 is the outer plate stiffening rib plate, 28 is the first water inlet, 29 is the first water outlet. DETAILED DESCRIPTION

[0052] The application will be described in detail below with specific embodiments. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that for those skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made. These are within the scope of the present application.

[0053] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein.

[0054] In addition, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of the application to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0055] REFERENCE Figures 1-17The shield tunnel segment joint waterproof test device provided by the embodiment of the present application can independently adjust deformation, and comprises a supporting mechanism, a sealing mechanism, a water pressure loading mechanism 14, a water inlet mechanism and a water outlet mechanism, wherein the supporting mechanism is used for providing support for the test device; the bottom of the sealing mechanism is fixedly connected with the upper surface of the supporting mechanism, the sealing mechanism comprises a plurality of test pieces, the working surfaces (i.e., the mutually adhering surfaces) between the plurality of test pieces form preset-shaped inner joints and outer joints, the preset shape may, for example, be a straight line shape or a T shape, and of course other shapes can also be adopted, and the preset shape is determined according to test requirements; the sealing gasket to be tested is a double-seal gasket, comprising an outer gasket 1 and an inner gasket 2, the test pieces on both sides of the inner joint are provided with inner grooves for pasting the inner gasket 2 on the working surface, the test pieces on both sides of the outer joint are provided with outer grooves for pasting the outer gasket 1 on the working surface, and the test pieces on both sides of the inner joint and the outer joint are fixed by bolts 8; the sealing mechanism is divided into two independent sealing mechanisms by pasting the inner gasket 2 and the outer gasket 1, which are respectively a first sealing mechanism and a second sealing mechanism from inside to outside; the water pressure loading mechanism 14 provides water pressure loading for the sealing mechanism; the water inlet mechanism comprises a first water inlet 28 arranged on the first sealing mechanism, and the first water inlet 28 is communicated with the water pressure loading mechanism 14 through a water inlet joint 11 and an external pipeline 13; the water outlet mechanism comprises a first water outlet 29 arranged on the first sealing mechanism, and the first water outlet 29 is connected with a water outlet pipeline 12, and the air inside the sealing mechanism is discharged through the first water outlet 29 and the water outlet pipeline 12.

[0056] The test device provided by the above embodiment is fixed by the bolts 8 between the test pieces on both sides of the inner joint and the outer joint, respectively, so that the opening amount and the misalignment amount of the inner gasket 2 and the outer gasket 1 can be respectively set, thereby independently adjusting and setting the opening amount and the misalignment amount of the inner and outer double-seal gaskets, and more truly simulating the operation state of the double-seal gasket.

[0057] In the above embodiment, the test pieces forming the sealing mechanism are steel pieces, the steel pieces are engraved with sealing gasket grooves of a certain width and depth on the working surface, the inner gasket 2 and the outer gasket 1 are respectively pasted in the corresponding grooves, and the integral sealing mechanism is formed, so that two independent sealing spaces are formed inside the sealing mechanism.

[0058] In some optional embodiments, with reference to Figures 1-9The sealing mechanism includes a first base plate 5 and an inner cover plate 3 and an outer cover plate 4 respectively covering the first base plate 5, with the outer cover plate 4 also covering the inner cover plate 3; the first base plate 5, the inner cover plate 3, and the outer cover plate 4 are all steel plates; an inner channel joint is formed between the inner cover plate 3 and the first base plate 5, and an outer channel joint is formed between the outer cover plate 4 and the first base plate 5, both the inner and outer channel joints being straight seams, and the testing device is a straight seam testing device; the inner channel groove is provided on the working surface where the inner cover plate 3 and the first base plate 5 are in contact, including the first base plate inner channel groove 16 provided on the working surface of the first base plate 5 and the inner cover plate... The inner cover plate of the working surface has an inner groove 17, and the outer groove is provided on the working surface where the outer cover plate 4 and the first base plate 5 are in contact with each other. It includes the first base plate outer groove 15 provided on the working surface of the first base plate 5 and the outer cover plate outer groove 19 provided on the working surface of the outer cover plate 4. The inner cover plate 3 and the outer cover plate 4 are provided with first bolt holes 18 around their perimeters. One end of the bolt 8 is welded to the corresponding position of the first base plate 5. When the cover is closed, the bolt 8 passes through the first bolt hole 18 to fix the inner cover plate 3 and the outer cover plate 4 to the first base plate 5 respectively. This straight-slit sealing mechanism can be used for the waterproof performance test of the straight-slit sealing gasket.

[0059] In some embodiments, the outer cover plate 4 has a protruding structure that protrudes away from the inner cover plate 3. Specifically, the inner cover plate 3 covers the middle of the first base plate 5, and the protruding structure is correspondingly located in the middle of the outer cover plate 4. The size of the protruding structure is larger than the size of the inner cover plate 3, for example, the size of the protruding structure is slightly larger than the size of the inner cover plate 3, so that the gap between the two cover plates can accommodate the independent and free movement of the two cover plates. The size of the gap between the inner cover plate 3 and the outer cover plate 4 depends on the maximum opening and misalignment that can be accommodated under the test conditions.

[0060] In some embodiments, the outer cover plate 4 may have a second water inlet and a second water outlet at the location between the inner channel groove and the outer channel groove. The second water outlet is used to discharge the air inside the second sealing mechanism. The water pressure is increased through the first water inlet 28, which can realize the water pressure in the first sealing mechanism is gradually loaded and successively breaks through the double sealing gaskets. This allows for the study of the water pressure changes in the sealing space between the outer sealing gasket 1 and the inner sealing gasket 2 and the related effects under different test conditions.

[0061] In some embodiments, a viewing window 20 is provided on the outer cover plate 4, through which the leakage of the inner sealing gasket 2 can be observed, including the leakage location and the water pressure change when leakage occurs. Preferably, the viewing window 20 is made of a high-pressure resistant transparent material.

[0062] In some embodiments, multiple transverse stiffening ribs 6 and longitudinal stiffening ribs 7 are provided above the outer cover plate 4 to enhance the strength of the specimen, thereby increasing the overall strength of the sealing mechanism.

[0063] In some alternative embodiments, referring to Figures 10-17 The sealing mechanism includes a second base plate 5' and a first outer plate 23, a second outer plate 24, a first inner block 21 and a second inner block 22 located on the second base plate 5'. Each of the above-mentioned test pieces is a steel plate. The first outer plate 23 and the second outer plate 24 are both L-shaped and left-right symmetrical structures. The first inner block 21 and the second inner block 22 are both triangular prisms and left-right symmetrical structures. The first inner block 21 and the second inner block 22 are located between the first outer plate 23 and the second outer plate 24. An inner joint is formed between the first inner block 21 and the second inner block 22, and an outer joint is formed between the first outer plate 23 and the second outer plate 24. The inner joint and the outer joint contain a T-shaped joint. It should be noted that the T-shaped joint is a shape that the above-mentioned test piece has after being attached to the side surface. In addition to the side surface, a straight joint is also formed between other surfaces. The testing device is a T-shaped joint testing device. The inner groove is located on the working surface of the first inner block 21 and the second inner block 22, including a second base plate inner groove 16' located on the working surface of the second base plate 5' and an inner block groove 25 located on the working surface of the first inner block 21 and the second inner block 22. The outer groove is located on the working surface of the first outer plate 23 and the second outer plate 24, including a second base plate outer groove 15' located on the working surface of the second base plate 5' and an outer plate groove 26 located on the working surface of the first outer plate 23 and the second outer plate 24. The first inner block 21, the second inner block 22, the first outer plate 23 and the second outer plate 24 are all provided with second bolt holes 18'. The bolts 8 pass through the second bolt holes 18' to connect the first inner block 21, the second inner block 22, the first outer plate 23 and the second outer plate 24 to the second base plate 5', respectively, and connect the first inner block 21 and the second inner block 22, and the first outer plate 23 and the second outer plate 24 on the mutually attached working surface. The first inner block 21 and the second inner block 22 can adopt a hollow structure formed by welding a steel plate. The surface at the position of the second bolt hole 18' is inwardly recessed to form a recessed space as an operating space of the second bolt hole 18' to facilitate fixed connection by the bolt 8. The T-shaped joint sealing mechanism can be used for waterproof performance test of the T-shaped joint sealing gasket.

[0064] In some embodiments, a triangular prism space is formed between the first outer plate 23 and the second outer plate 24. The volume of the triangular prism space is greater than the volume of the first inner block 21 and the second inner block 22 after being attached. For example, the volume of the triangular prism space is slightly greater than the volume of the first inner block 21 and the second inner block 22 after being attached, so that the gap between the outer plate and the inner block can adapt to the independent and free movement of the outer plate and the inner block. The size of the gap depends on the maximum opening and misalignment amount that can be adapted to the test conditions.

[0065] In some embodiments, the first outer plate 23 is provided with a third water inlet and a third water outlet at a position between the corresponding inner channel groove and the outer channel groove, the third water outlet is used to discharge the air inside the second sealing mechanism, the water pressure is pressurized through the first water inlet 28, the water pressure in the first sealing mechanism can be loaded step by step, and the double-channel sealing gasket can be broken through in sequence, so that the water pressure change in the sealing space between the outer channel sealing gasket 1 and the inner channel sealing gasket 2 and the related influence under different test conditions can be studied.

[0066] In some embodiments, the first outer plate 23 and the second outer plate 24 are both provided with a visual window 20 for observing the leakage of the inner channel sealing gasket 2, including the leakage position and assisting in judging the water pressure change when leakage occurs, and preferably, the visual window 20 is made of high-pressure resistant transparent material.

[0067] In some embodiments, the outer plate stiffening rib plate 27 is provided on the outer side of the first outer plate 23 and the second outer plate 24, and the outer plate stiffening rib plate 27 is triangular to enhance the strength of the test piece, thereby increasing the overall strength of the sealing mechanism.

[0068] In the above embodiments, in order to adapt to the setting of double-channel sealing gaskets, multi-channel sealing gaskets or sealing gaskets of different sizes, the test pieces forming the sealing mechanism can be made into different specifications according to different test objects to meet different test requirements.

[0069] The prior art realizes the differential setting of the opening amount by setting grooves or bosses of different heights in each test piece, but this differential setting depends on the initial height of the set grooves or bosses, and for the same type of sealing gasket, more test equipment is needed to meet different deformation conditions. The above embodiments are based on the idea of dividing the sealing mechanism into two independent sealing structures and allowing the sealing mechanism to move freely, and the opening amount and the misalignment amount of the double-channel sealing gasket can be independently adjusted and set within a reasonable range, and the adjustment and setting of the opening amount and the misalignment amount of the double-channel sealing gasket do not affect each other and are completely independent, so as to meet different deformation conditions, and the test operation is convenient and efficient.

[0070] It should be noted that in other embodiments, the first sealing mechanism can also adopt other structures (such as a cube type) or form other forms of joints to meet different test requirements.

[0071] In the above embodiments, the working surfaces of the multiple test pieces of the sealing mechanism form the inner channel joint and the outer channel joint of the preset shape, and the application scenarios of different joints are considered, so that test research under various conditions can be carried out, and the waterproof performance of the double-channel sealing gasket of the segment can be more reasonably analyzed and researched.

[0072] In some embodiments, the water outlet pipe 12 also serves as an air outlet, and since the first water inlet 28 and the first water outlet 29 are arranged in the same plane, in order to enable the water to fill the space in the sealing mechanism to discharge the air, the water outlet pipe 12 extends upwards beyond the bottom of the sealing mechanism to above the sealing mechanism.

[0073] In some embodiments, the support mechanism includes four test bench supports 9 arranged at the four corners below the sealing mechanism, the test bench supports 9 are columnar, the top of the test bench supports 9 is connected with the bottom of the sealing mechanism, and the bottom of the test bench supports 9 is provided with an adjustable height support corner 10, the support corner 10 is movably connected with the test bench support 9 through threads, and by adjusting the tightness of the threads of the adjustable height support corner 10, the bottom of the sealing mechanism can be adjusted to be horizontal to meet the waterproof test conditions.

[0074] The test device in the above embodiments can consider the actual working conditions of the shield segment tunnel operation, and on the basis of not adding existing test technical parameters, by dividing the sealing mechanism into two independent sealing structures and enabling the sealing mechanism to independently and freely move, forming the preset shape of the inner joint and the outer joint between the working surfaces of the multiple test pieces of the sealing mechanism, and respectively fixing the test pieces on both sides of the inner joint and the outer joint by the bolts 8, the independent adjustment and setting of the opening amount and the misalignment amount of the double-seal gasket can be realized, so that the waterproof parameters of the sealing gasket in line with the actual situation can be obtained, and the test device has clear principle, simple structure and convenient operation.

[0075] Based on the same inventive concept, another embodiment of the present application provides a shield tunnel segment sealing gasket waterproof performance test method, which is realized by using the shield tunnel segment sealing gasket waterproof performance test device described above, and the method comprises the following steps:

[0076] S1, connecting the bottom of the sealing mechanism with the upper surface of the support mechanism;

[0077] Specifically, the first bottom plate 5 of the one-letter joint sealing mechanism or the second bottom plate 5' of the T-letter joint sealing mechanism is connected with the top of the test bench support 9, and the first bottom plate 5 or the second bottom plate 5' is adjusted to be horizontal by adjusting the adjustable height support corner 10.

[0078] S2, pasting the sealing gasket to be tested at the inner channel groove and the outer channel groove of the sealing mechanism test piece;

[0079] Specifically, the sealing gasket to be tested includes an outer channel sealing gasket 1 and an inner channel sealing gasket 2, for one-letter joint test, the outer channel sealing gasket 1 and the inner channel sealing gasket 2 are pasted into the corresponding sealing gasket grooves of the first bottom plate 5, the inner cover plate 3 and the outer cover plate 4 respectively. For T-letter joint test, the outer channel sealing gasket 1 and the inner channel sealing gasket 2 are pasted into the corresponding sealing gasket grooves of the second bottom plate 5', the first outer plate 23, the second outer plate 24, the first inner block 21 and the second inner block 22 respectively.

[0080] S3, set the opening amount and misalignment amount of the inner channel sealing gasket 2, and use the bolt 8 to fix the test pieces on both sides of the inner channel joint;

[0081] Specifically, for the one-joint test, the inner cover plate 3 is buckled at the inner channel sealing gasket 2 of the first bottom plate 5, the opening amount and misalignment amount of the inner channel sealing gasket 2 are set according to the test conditions, and then the inner cover plate 3 and the first bottom plate 5 are fixed by the bolt 8, forming a sealed space between the bottom of the inner cover plate 3, the top of the first bottom plate 5 and the inner channel sealing gasket 2;

[0082] For the T-joint test, the first inner block 21 and the second inner block 22 are fixed through the second bolt hole 18' on the side and top, and then the fixed first inner block 21 and the second inner block 22 are fixed with the second bottom plate 5', and the opening amount and misalignment amount are set, forming a sealed space between the right side and bottom of the first inner block 21, the left side and bottom of the second inner block 22, the top of the second bottom plate 5' and the inner channel sealing gasket 2.

[0083] S4, set the opening amount and misalignment amount of the outer channel sealing gasket 1, and use the bolt 8 to fix the test pieces on both sides of the outer channel joint;

[0084] Specifically, for the one-joint test, the outer cover plate 4 is buckled at the outer channel sealing gasket 1 of the first bottom plate 5, the opening amount and misalignment amount of the outer channel sealing gasket 1 are set according to the test conditions, and then the outer cover plate 4 and the first bottom plate 5 are fixed by the bolt 8, forming a sealed space between the bottom of the outer cover plate 4, the top of the inner cover plate 3, the top of the first bottom plate 5, the inner channel sealing gasket 2 and the outer channel sealing gasket 1;

[0085] For the T-joint test, the first outer plate 23 and the second outer plate 24 are fixed through the second bolt hole 18' on the side and top, and then the fixed first outer plate 23 and the second outer plate 24 are fixed with the second bottom plate 5', and the opening amount and misalignment amount are set, forming a sealed space between the right side and bottom of the first outer plate 23, the left side and bottom of the second outer plate 24, the outer side of the first inner block 21, the outer side of the second inner block 22, the top of the second bottom plate 5', the inner channel sealing gasket 2 and the outer channel sealing gasket 1.

[0086] S5, connect the water pressure loading mechanism 14 with the first water inlet 28, after the water fills the internal space of the sealing mechanism, discharge the air in the internal space of the sealing mechanism through the first water outlet 29 and the water outlet pipeline 12, and then block the water outlet pipeline 12;

[0087] Specifically, one end of the outer pipe 13 is connected with the water pressure loading mechanism 14, and the other end is connected with the water inlet joint 11, the water inlet joint 11 is connected with the first water inlet 28, the water outlet pipe 12 is connected with the first water outlet 29, water is injected into the sealing mechanism, the air inside the sealing mechanism is discharged through the first water outlet 29 and the water outlet pipe 12, and the water outlet pipe 12 is blocked by a nut;

[0088] S6, start the water pressure loading mechanism 14, until the outer sealing gasket 1 is waterproof, the test is finished, and the waterproof performance of the sealing gasket to be tested is obtained.

[0089] The test device and method provided by the above embodiment can realize independent adjustment and setting of the opening amount and the misalignment amount of the inner sealing gasket and the outer sealing gasket by dividing the sealing mechanism into two independent sealing structures, allowing the sealing mechanism to move freely and independently, forming the inner channel joint and the outer channel joint of a preset shape between the working surfaces of multiple test pieces of the sealing mechanism, and respectively adopting bolts to fix the test pieces on both sides of the inner channel joint and the outer channel joint. The test device and method have the function of independently adjusting and setting the opening amount and the misalignment amount of the double sealing gaskets, the test conditions are more in line with the actual situation on the basis of not adding existing test technical parameters, and the test device and method have the characteristics of clear principle, simple device structure and convenient operation.

[0090] The above embodiments simultaneously consider the application scenarios of different joints, so that test research under various working conditions can be carried out, and the waterproof performance of the double sealing gaskets of the shield tunnel segment is more reasonably analyzed and researched.

[0091] The specific embodiments of the application are described above. It should be understood that the application is not limited to the above specific embodiments, and those skilled in the art can make various modifications or changes within the scope of the claims, which does not affect the essential content of the application. The above preferred features can be combined for use in the case of not conflicting with each other.

Claims

1. A shield tunnel segment joint waterproof test device capable of being independently adjusted to deform, characterized in that, The utility model provides a test device for testing the sealing performance of the sealing mechanism of the water supply and drainage pipe, which comprises the following parts: a supporting mechanism for providing support for the test device; a sealing mechanism, the bottom of the sealing mechanism is fixedly connected with the upper surface of the supporting mechanism, the sealing mechanism comprises a plurality of test pieces, the working surfaces of the plurality of test pieces form a preset shape of inner and outer joints, the test pieces on both sides of the inner joint are provided with an inner groove for pasting an inner sealing gasket on the working surface, the test pieces on both sides of the outer joint are provided with an outer groove for pasting an outer sealing gasket on the working surface, and the test pieces on both sides of the inner joint and the outer joint are fixed by bolts; the sealing mechanism is divided into two independent sealing mechanisms, i.e., a first sealing mechanism and a second sealing mechanism from inside to outside, by pasting the inner sealing gasket and the outer sealing gasket; a water pressure loading mechanism for providing water pressure loading for the sealing mechanism; a water inlet mechanism comprising a first water inlet provided on the first sealing mechanism, the first water inlet is communicated with the water pressure loading mechanism through a water inlet joint and an external pipeline in sequence; a water outlet mechanism comprising a first water outlet provided on the first sealing mechanism, the first water outlet is connected with a water outlet pipeline, and the air inside the sealing mechanism is discharged through the first water outlet and the water outlet pipeline.

2. The independently-adjustable-deformation shield tunnel segment joint waterproof test device according to claim 1, characterized in that, The sealing mechanism comprises a first bottom plate and inner and outer cover plates covering the first bottom plate, and the outer cover plate covers the inner cover plate at the same time; the inner joint is formed between the inner cover plate and the first bottom plate, the outer joint is formed between the outer cover plate and the first bottom plate, and the inner joint and the outer joint are both one-letter joints; the inner groove is arranged on the working surface of the mutual adhesion of the inner cover plate and the first bottom plate, and the outer groove is arranged on the working surface of the mutual adhesion of the outer cover plate and the first bottom plate; first bolt holes are arranged around the inner cover plate and the outer cover plate, and the inner cover plate and the outer cover plate are fixedly connected with the first bottom plate through the first bolt holes.

3. The independently-adjustable-deformable shield tunnel segment joint waterproof test device according to claim 2, characterized in that, The outer cover plate is provided with a convex structure protruding away from the inner cover plate, and the size of the convex structure is greater than the size of the inner cover plate.

4. The independently-adjustable-deformation shield tunnel segment joint waterproof test device according to claim 1, characterized in that, The sealing mechanism comprises a second bottom plate, a first outer plate, a second outer plate, a first inner block and a second inner block on the second bottom plate; the first outer plate and the second outer plate are both L-shaped and left-right symmetrical structures, and the first inner block and the second inner block are both three-prism-shaped and left-right symmetrical structures; the first inner block and the second inner block are located between the first outer plate and the second outer plate; the inner joint is formed between the first inner block and the second inner block, the outer joint is formed between the first outer plate and the second outer plate, and the inner joint and the outer joint contain T-shaped joints; the inner groove is arranged on the working surface of the mutual adhesion of the first inner block and the second inner block, and the outer groove is arranged on the working surface of the mutual adhesion of the first outer plate and the second outer plate; The first inner block, the second inner block, the first outer plate and the second outer plate are provided with second bolt holes around, bolts pass through the second bolt holes to connect the first inner block, the second inner block, the first outer plate and the second outer plate to the second bottom plate respectively, and connect the first inner block and the second inner block, the first outer plate and the second outer plate on the mutual adhering working surface.

5. The independently-adjustable-deformable shield tunnel segment joint waterproof test device according to claim 4, characterized in that, The first outer plate and the second outer plate form a triangular prism space therebetween, and the volume of the triangular prism space is greater than the volume of the first inner block and the second inner block after being adhered.

6. The independently-adjustable-deformable shield tunnel segment joint waterproof test device according to claim 1, characterized in that, The water outlet pipeline serves as an exhaust port, and extends upwards above the sealing mechanism around the bottom of the sealing mechanism.

7. The independently-adjustable-deformable shield tunnel segment joint waterproof test device according to claim 1, characterized in that, The support mechanism comprises test bench supports at four corners below the sealing mechanism, and the bottom of the test bench support is provided with adjustable height support corners.

8. A method for testing the waterproofness of a shield tunnel segment joint with independently adjustable deformation, using the shield tunnel segment joint waterproofness testing device with independently adjustable deformation according to any one of claims 1-7, characterized in that, It comprises: connecting the bottom of the sealing mechanism with the upper surface of the support mechanism; pasting the to-be-tested sealing gasket on the inner channel groove and the outer channel groove on the test piece of the sealing mechanism; setting the opening amount and the misalignment amount of the inner channel sealing gasket, and fixing the test pieces on both sides of the inner channel joint by bolts; setting the opening amount and the misalignment amount of the outer channel sealing gasket, and fixing the test pieces on both sides of the outer channel joint by bolts; connecting the water pressure loading mechanism with the first water inlet, discharging the air inside the sealing mechanism through the first water outlet and the water outlet pipeline, and then blocking the water outlet pipeline; starting the water pressure loading mechanism, until the outer channel sealing gasket fails in waterproof, the test is completed, and the waterproof performance of the to-be-tested sealing gasket is obtained.

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