A watertightness test device and test method for waterstop

Abstract

The present invention discloses a watertightness test device and a test method for waterstops, the test device comprises a reinforced concrete compression ring, a steel cover plate, a first steel tension ring, a second steel tension ring, a plurality of force transmission rods and a waterstop mounting part, forming a force self-balancing system, and after air or water is pressurized and injected into different closed compartments, the watertightness of two different types of waterstops can be tested simultaneously. The advantages of the present invention are: the test device is suitable for watertightness tests of different types of waterstops at the same time, and the work efficiency is high. Moreover, only one set of devices needs to be processed, which saves the test cost, thereby achieving the purpose of economically and efficiently testing the watertightness of waterstops.

Description

Technical Field

[0001] The invention belongs to the field of tunnel construction engineering, and in particular relates to a watertightness test device for a waterstop and a test method thereof. Background Art

[0002] Under the existing technology, underground projects generally have a double-channel waterproof structure, which requires two sets of equipment to complete the watertightness test of the two waterstops respectively, which increases the test cost and reduces the test efficiency. In addition, the embedded parts of the waterstops in underground projects are generally composed of steel plates and anchor bars (or anchor bolts). The embedded parts of the waterstops are buried in the concrete surface, and the watertightness of the contact surface with the concrete sometimes becomes the weak link of the watertightness. Conventional watertightness tests use pure steel structure pressure rings, which cannot reflect the true working state of the watertightness of the embedded parts of the waterstops in the reinforced concrete structure. Summary of the invention

[0003] The purpose of the present invention is to provide a watertightness test device and a test method for waterstop strips based on the above-mentioned deficiencies in the prior art. The test device forms a force self-balancing system by setting a special reinforced concrete compression ring, a first steel tension ring, a second steel tension ring and their connecting components. After pressurizing and injecting air or water into different closed compartments, the watertightness performance of two different types of waterstop strips can be tested at the same time.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A device for testing the water tightness of a waterstop, characterized in that the test device comprises a reinforced concrete compression ring, a steel cover plate, a first steel tension ring, a second steel tension ring, a plurality of force transfer rods and a waterstop mounting member, wherein the second steel tension ring and the first steel tension ring are arranged on the upper and lower sides and are located on the outside of the reinforced concrete compression ring, the inner edge and the outer edge of the steel cover plate are fixedly arranged on the top surface of the second steel tension ring and the top surface of the reinforced concrete compression ring, respectively, and a first compartment is formed under the common enclosure of the steel cover plate, the inner wall surface of the second steel tension ring, the outer wall surface of the reinforced concrete compression ring and the top surface of the first steel tension ring; a second compartment is formed under the common enclosure of the first steel tension ring and the reinforced concrete compression ring; the outer periphery of the reinforced concrete compression ring is connected to the first steel tension ring through the force transfer rods uniformly distributed circumferentially.

[0006] A rubber plate is provided between the contact surfaces of the top plate of the first steel tension ring and the bottom plate of the second steel tension ring.

[0007] The outer side of the reinforced concrete pressure ring is provided with a first embedded part, a second embedded part and a third embedded part in sequence from top to bottom; the waterstop installation part includes an upper waterstop pressure plate and a lower waterstop pressure plate located in the first compartment, and also includes an upper and lower row of limit blocks located in the second compartment; a telescopic waterstop is installed between the upper waterstop pressure plate and the lower waterstop pressure plate, the upper part of the telescopic waterstop is fixed to the first embedded part on the upper part of the outer side of the reinforced concrete pressure ring through the upper waterstop pressure plate, and the lower part of the telescopic waterstop is fixed to the top plate of the first steel tension ring through the lower waterstop pressure plate to seal the first compartment; the upper end of the force transmission rod is fixedly connected to the second embedded part, and the lower end is fixedly connected to the top plate of the first steel tension ring; the third embedded part is located at the lower part of the outer side of the reinforced concrete pressure ring; a grouting waterstop is installed between the upper and lower rows of limit blocks.

[0008] The test device also includes a first air outlet pipe, a second air outlet pipe, a first water injection pipe and a second water injection pipe. The first air outlet pipe penetrates the steel cover plate to connect the first compartment with the outside atmosphere, the second air outlet pipe penetrates the wall of the reinforced concrete pressure ring to connect the second compartment with the outside atmosphere, the first water injection pipe penetrates the wall of the second steel tension ring to connect the first compartment with the outside world, the second water injection pipe penetrates the wall of the reinforced concrete pressure ring to connect the second compartment with the outside world, and valves are provided on the first air outlet pipe, the second air outlet pipe, the first water injection pipe and the second water injection pipe.

[0009] Water-stop rubber plates are provided between the contact surfaces of the inner and outer edges of the steel cover plate with the second steel tension ring top plate and with the reinforced concrete compression ring top plate and are fixed by bolts and washers.

[0010] A fourth embedded part is provided on the top of the reinforced concrete pressure ring, and the contact portion between the inner edge of the steel cover plate and the reinforced concrete pressure ring is located on the fourth embedded part.

[0011] The plane shapes of the reinforced concrete compression ring, the first steel tension ring, and the second steel tension ring are rectangular or circular.

[0012] A test method for a watertightness test device for a waterstop strip as described in any one of the above items, characterized in that the test method comprises the following steps: injecting water into a first compartment through a first water injection pipe on the test device and exhausting the air through a first air outlet pipe, closing the first air outlet pipe after the water injection is completed, and then continuing to inject water into the first compartment in stages and pressurizing it to a design pressure, observing whether there is any water leakage at the position of the telescopic waterstop strip in the first compartment; then closing the first water injection pipe and injecting water into the second compartment through a second water injection pipe and exhausting the air through the second air outlet pipe, closing the second air outlet pipe after the water injection is completed, continuing to inject water into the second compartment in stages and pressurizing it to a design pressure, observing whether there is any water leakage at the position of the grouting waterstop strip in the second compartment.

[0013] When pressurizing the second compartment, the first compartment is kept sealed.

[0014] The advantages of the present invention are:

[0015] (1) The watertightness test device and test method for waterstops use a set of test devices, which can simulate the working conditions of two different types of waterstops at the same time, have a wider range of applications, and can achieve the purpose of economically and efficiently testing their watertightness;

[0016] (2) The pressure ring adopts reinforced concrete structure, which can not only truly simulate the watertightness of the waterstop and the watertightness of the contact between the embedded parts and the waterstop, but also simulate the watertightness of the embedded parts when they are embedded in the concrete, and the cost is more economical than the steel structure. Engineering experience shows that the embedded parts of the waterstop in underground projects are generally composed of steel plates and anchor bars (or anchor bolts). The embedded parts of the waterstop are buried in the concrete surface, and the watertightness of the contact surface with the concrete sometimes becomes the weak link of the watertightness. Conventional watertightness tests use pure steel structure pressure rings, which cannot reflect the actual working status of the watertightness of the embedded parts of the waterstop in the reinforced concrete structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural plane diagram of a watertightness test device for a waterstop in the present invention;

[0018] Figure 2 It is a cross-sectional view of the watertightness testing device for the waterstop in the present invention. DETAILED DESCRIPTION

[0019] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0020] As Figure 1-2, the marks in the figure are: reinforced concrete compression ring 1, steel cover plate 2, first steel tension ring 3, second steel tension ring 4, force transmission rod 5, first embedded part 6, second embedded part 7, third embedded part 8, fourth embedded part 9, waterstop upper pressure plate 10, waterstop lower pressure plate 11, limit block 12, rubber plate 13, telescopic waterstop 14, grouting waterstop 15, first compartment 16, second compartment 17, waterstop rubber plate 18, first air outlet pipe 19, second air outlet pipe 20, first water injection pipe 21, second water injection pipe 22.

[0021] Example: Figure 1-2 As shown, this embodiment specifically relates to a watertightness test device for a waterstop, the test device comprising a reinforced concrete compression ring 1, a steel cover plate 2, a first steel tension ring 3, a second steel tension ring 4, a plurality of force transmission rods 5 and a waterstop mounting member. The plane shape of the reinforced concrete compression ring 1, the first steel tension ring 3, and the second steel tension ring 4 is a quasi-rectangular or circular shape. In this embodiment, the plane shapes of the reinforced concrete compression ring 1, the first steel tension ring 3, and the second steel tension ring 4 are all quasi-rectangular.

[0022] like Figure 1 , 2 As shown, the second steel tension ring 4 and the first steel tension ring 3 are arranged one above the other on the outside of the reinforced concrete compression ring 1, and the second steel tension ring 4, the outer wall of the reinforced concrete compression ring 1, the telescopic water stop 14 and the steel cover plate 2 form a first compartment 16, and the first steel tension ring 3, the telescopic water stop 14, the grouting water stop 15 and the reinforced concrete compression ring 1 form a second compartment 17; the second steel tension ring 4 and the reinforced concrete compression ring 1 are sealed with the steel cover plate 2 by the water stop rubber plate 18 and fixed by bolts and washers. The outer periphery of the reinforced concrete compression ring 1 is connected to the first steel tension ring 3 by force transmission rods 5 evenly distributed in the circumference.

[0023] like Figure 1 , 2 As shown, the outer side of the reinforced concrete pressure ring 1 is provided with a first embedded part 6, a second embedded part 7 and a third embedded part 8 in sequence from top to bottom, and a fourth embedded part 9 is provided on the top of the reinforced concrete pressure ring 1. The first embedded part 6 is embedded in the upper outer part of the reinforced concrete pressure ring 1 and is located in the first compartment 16, on which the waterstop upper pressure plate 10 is installed; the second embedded part 7 is embedded in the middle part of the reinforced concrete pressure ring 1 and is located in the first compartment 16, on which the force transmission rod 5 is fixedly connected; the third embedded part 8 is embedded in the lower part of the reinforced concrete pressure ring 1 and is located in the second compartment 17; the fourth embedded part 9 is embedded in the top of the reinforced concrete pressure ring 1, and the steel cover plate 2 is connected to the reinforced concrete pressure ring 1 through the fourth embedded part 9.

[0024] like Figure 1 , 2As shown, the waterstop installation part includes an upper waterstop plate 10 and a lower waterstop plate 11 located in the first compartment 16, and also includes two upper and lower rows of limit blocks 12 located in the second compartment 17; the upper waterstop plate 10 is connected to the first embedded part 6, a rubber plate 13 is provided between the first compartment 16 and the second compartment 17, the lower waterstop plate 11 is installed on the rubber plate 13, and a telescopic waterstop 14 is installed between the upper waterstop plate 10 and the lower waterstop plate 11, so as to close the first compartment 16. The upper end of the force transmission rod 5 is fixedly connected to the outer wall surface of the reinforced concrete compression ring 1 through the second embedded part 7, and the lower end of the force transmission rod 5 is fixed to the upper surface of the first steel tension ring 3; the third embedded part 8 is located on one side of the second compartment 17, and a grouting waterstop 15 is installed between the upper and lower rows of limit blocks 12.

[0025] like Figure 1 , 2 As shown, the test device also includes a first air outlet pipe 19, a second air outlet pipe 20, a first water injection pipe 21 and a second water injection pipe 22, wherein the first air outlet pipe 19 passes through the steel cover plate 2 to be connected with the first compartment 16, the second air outlet pipe 20 passes through the reinforced concrete pressure ring 1 to be connected with the second compartment 17, the first water injection pipe 21 passes through the second steel tension ring 4 to be connected with the first compartment 16, the second water injection pipe 22 passes through the reinforced concrete pressure ring 1 to be connected with the second compartment 17, and valves are provided on the first air outlet pipe 19, the second air outlet pipe 20, the first water injection pipe 21 and the second water injection pipe 22.

[0026] like Figure 1-2 As shown, the installation method and test method for the watertightness test device of the waterstop in this embodiment include the following steps:

[0027] (1) According to the type of waterstop and the working water pressure, the specifications of the reinforced concrete compression ring 1, the first steel tension ring 3, the second steel tension ring 4 and the force transfer rod 5 are designed and determined;

[0028] (2) Arranging the first embedded part 6, the second embedded part 7, the third embedded part 8, the fourth embedded part 9, the second air outlet pipe 20 and the second water injection pipe 22 on the reinforced concrete pressure ring 1, and casting the reinforced concrete pressure ring 1 in the test site;

[0029] (3) Process the first steel tension ring 3, the second steel tension ring 4, the steel cover plate 2 and the force transmission rod 5, install the first air outlet pipe 19 on the steel cover plate 2, pass the first water injection pipe 21 through the second steel tension ring 4, and pre-assemble and deliver to the test site;

[0030] (4) Install the telescopic waterstop 14 and the grouting waterstop 15 in sequence to form the first compartment 16 and the second compartment 17, thus completing the assembly of the test device;

[0031] (5) Open the valves of the first water injection pipe 21 and the first air outlet pipe 19, inject water into the first compartment 16 through the first water injection pipe 21, and exhaust air through the first air outlet pipe 19 at the same time. After the water injection is completed, close the first air outlet pipe 19, continue to inject water into the first compartment 16 in stages and pressurize it to the design pressure, and observe whether there is any water leakage at the position of the telescopic water stop 14 in the first compartment 16; then close the valve of the first water injection pipe 21, and when injecting water into the second compartment 17, keep the water in the first compartment 16, and close the first water injection pipe 21 and the first air outlet pipe. 19 to prevent the first compartment 16 from depressurizing, then open the valves of the second water injection pipe 22 and the second air outlet pipe 20, inject water into the second compartment 17 through the second water injection pipe 22, close the second air outlet pipe 20 after the water injection is completed, continue to inject water into the second compartment 17 in stages and pressurize it to the design pressure, and observe whether there is any water leakage at the position of the grouting waterstop 15 in the second compartment 17; it should be noted that when pressurizing the second compartment 17, the first compartment 16 should be kept closed to avoid depressurization, thereby ensuring the force balance of the telescopic waterstop 14.

Claims

1. A watertightness test device for waterstop, characterized in that The test device comprises a reinforced concrete compression ring, a steel cover plate, a first steel tension ring, a second steel tension ring, a plurality of force transmission rods and a water stop belt mounting member, wherein the second steel tension ring and the first steel tension ring are arranged on the upper and lower sides and are located on the outer side of the reinforced concrete compression ring, the inner edge portion and the outer edge portion of the steel cover plate are fixedly arranged on the top surface of the second steel tension ring and the top surface of the reinforced concrete compression ring respectively, a first compartment is formed under the common enclosure of the second steel tension ring, the outer wall surface of the reinforced concrete compression ring, the telescopic water stop belt and the steel cover plate, and a second compartment is formed under the common enclosure of the first steel tension ring, the telescopic water stop belt, the grouting water stop belt and the reinforced concrete compression ring; the outer periphery of the reinforced concrete compression ring is connected to the first steel tension ring through the force transmission rods uniformly distributed circumferentially; A rubber plate is provided between the contact surfaces of the top plate of the first steel tension ring and the bottom plate of the second steel tension ring; The outer side of the reinforced concrete pressure ring is provided with a first embedded part, a second embedded part and a third embedded part in sequence from top to bottom; the waterstop installation part includes an upper waterstop pressure plate and a lower waterstop pressure plate located in the first compartment, and also includes two upper and lower rows of limit blocks located in the second compartment; the telescopic waterstop is installed between the upper waterstop pressure plate and the lower waterstop pressure plate, the upper part of the telescopic waterstop is fixed to the first embedded part on the upper part of the outer side of the reinforced concrete pressure ring through the upper waterstop pressure plate, and the lower part of the telescopic waterstop is fixed to the top plate of the first steel tension ring through the lower waterstop pressure plate, so as to seal the first compartment; the upper end of the force transmission rod is fixedly connected to the second embedded part, and the lower end is fixedly connected to the top plate of the first steel tension ring; the third embedded part is located at the lower part of the outer side of the reinforced concrete pressure ring; the grouting waterstop is installed between the upper and lower rows of limit blocks; The test device also includes a first air outlet pipe, a second air outlet pipe, a first water injection pipe and a second water injection pipe, the first air outlet pipe penetrates the steel cover plate to connect the first compartment with the outside atmosphere, the second air outlet pipe penetrates the wall of the reinforced concrete pressure ring to connect the second compartment with the outside atmosphere, the first water injection pipe penetrates the wall of the second steel tension ring to connect the first compartment with the outside, the second water injection pipe penetrates the wall of the reinforced concrete pressure ring to connect the second compartment with the outside, and valves are provided on the first air outlet pipe, the second air outlet pipe, the first water injection pipe and the second water injection pipe; Water-stop rubber plates are provided between the inner and outer edges of the steel cover plate and the contact surfaces with the second steel tension ring top plate and with the reinforced concrete compression ring top plate and are fixed by bolts and washers; A fourth embedded part is provided on the top of the reinforced concrete pressure ring, and the contact portion between the inner edge of the steel cover plate and the reinforced concrete pressure ring is located on the fourth embedded part.

2. A watertightness test device for waterstop according to claim 1, characterized in that The plane shapes of the reinforced concrete compression ring, the first steel tension ring, and the second steel tension ring are rectangular or circular.

3. A test method for the watertightness test device for waterstop according to claim 1, characterized in that The test method comprises the following steps: injecting water into the first compartment through the first water injection pipe on the test device and exhausting the air through the first air outlet pipe, closing the first air outlet pipe after the water injection is completed, and then continuing to inject water into the first compartment in stages and pressurizing it to the design pressure, and observing whether there is any water leakage at the position of the telescopic waterstop in the first compartment; then closing the first water injection pipe and injecting water into the second compartment through the second water injection pipe and exhausting the air through the second air outlet pipe, closing the second air outlet pipe after the water injection is completed, continuing to inject water into the second compartment in stages and pressurizing it to the design pressure, and observing whether there is any water leakage at the position of the grouting waterstop in the second compartment.

4. A test method for a water-stop watertightness test device according to claim 3, characterized in that When pressurizing the second compartment, the first compartment is kept sealed.

Images