CN109900559B - Experimental device and experimental method for testing bearing water pressure of buried water stop in deformation joint - Google Patents
Experimental device and experimental method for testing bearing water pressure of buried water stop in deformation joint Download PDFInfo
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- CN109900559B CN109900559B CN201910350957.1A CN201910350957A CN109900559B CN 109900559 B CN109900559 B CN 109900559B CN 201910350957 A CN201910350957 A CN 201910350957A CN 109900559 B CN109900559 B CN 109900559B
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- 230000004323 axial length Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 137
- 239000010959 steel Substances 0.000 claims description 137
- 239000006260 foam Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 8
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- 230000000087 stabilizing effect Effects 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
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- 238000007789 sealing Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 8
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- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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Abstract
The invention provides an experimental device and an experimental method for testing the bearing water pressure of a buried water stop in a deformation joint, and belongs to the technical field of measurement and test. The method solves the problem that the joint of the water stop belt is damaged at first when the water stop belt is pressurized in the existing experimental method for testing the bearing water pressure of the water stop belt in the deformation joint. The waterproof sealing structure comprises a lining and a waterproof ring with joints, wherein the waterproof ring is surrounded by a rectangular waterproof strip, the waterproof ring is centrally arranged in the lining, the axial length of the waterproof ring is smaller than the height of the lining, a deformation joint which extends radially outwards from the outer side of the waterproof ring is arranged at 1/2 of the height of the lining, the joints of the waterproof ring are positioned at one side far away from the deformation joint, a pressurizing assembly for pressurizing one side, far away from the joints, of the waterproof ring is arranged in the waterproof ring, and the pressurizing assembly is arranged opposite to the deformation joint. The invention can effectively prevent the weak point of the water stop belt from being damaged, and has the advantages of reasonable structural design, good experimental effect, wide application range and the like.
Description
Technical Field
The invention belongs to the technical field of measurement and test, and relates to an experimental device and an experimental method for testing the bearing water pressure of a buried water stop in a deformation joint.
Background
Along with the continuous development of economy, more and more cities are built with mountain tunnels, and the mountain tunnels penetrate through water-rich areas such as karst cave and the like, so that the situation of high water pressure is very likely to be faced, wherein deformation joints of many mountain tunnels are waterproof by adopting buried water stops. At present, no method for testing the highest waterproof strength of the water stop belt exists, so that great trouble is caused to design and construction, and the waterproof design of the tunnel has great blindness.
For this reason, chinese patent discloses a test method for limiting hydraulic pressure resistance of a size limit such as embedding a water stop in a deformation joint [ application publication No. CN107576574a ], including a steel bolt, a water stop, foam, a steel plate, a steel pipe, a water stop steel sheet, a steel spacer block, an upper steel plate, a construction joint, a lower steel plate, a round steel plate and a water stop joint, wherein the upper steel plate and the lower steel plate are welded together through four steel spacer blocks, a small opening is formed on an upper semicircle, and a thin steel pipe and an upper round steel plate are welded together at the small opening; a round water stop is sleeved around the water stop, and the water stop is bonded together at the joint so as to be watertight; pouring concrete, namely positioning the water stop belt, pouring the concrete to form a closed hollow structure, and using foam as a filling material during pouring to form a deformation joint; pressurizing step by using a pressurizing pump, and obtaining the maximum water pressure when water seepage of the water stop, concrete cracking or pressure gauge reduction is observed.
Although the test method is suitable for popularization and use, the following problems still exist: because the joints of the water stop are bonded together by using cold gel or hot melting measures, the bonding parts of the water stop are weak points and are arranged adjacent to the deformation joint, and the joints of the water stop can be damaged firstly in the pressurizing test, so that the test effect can not be achieved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an experimental device for ensuring that the water stop is buried in a test deformation joint which can not be subjected to water pressure at first.
An experimental method for testing the bearing water pressure of the buried water stop in the deformation joint is also provided.
The aim of the invention can be achieved by the following technical scheme:
the experimental device for water pressure bearing of the buried water stop in the deformation joint comprises a lining and a water stop ring with joints, wherein the water stop ring is surrounded by a rectangular water stop, the water stop ring is centrally arranged in the lining, and the axial length of the water stop ring is smaller than the height of the lining. The water stop ring and the pressurizing assembly are buried in the lining, and do not move relative to the lining. Because the tunnel passes through different bottom layers, the requirements of the same person on each section of bottom layer are different, so that the thickness of the lining and the waterproof mode of the deformation joint are also different, and the experimental device can simulate the actual structure of the deformation joint of the lining.
In the experimental device for embedding the water stop belt into the test deformation joint to bear the water pressure, the pressurizing assembly comprises a fan-shaped upper steel plate, a lower steel plate which is arranged opposite to the upper steel plate and a fixing plate which is vertically fixed between the upper steel plate and the lower steel plate, wherein the upper steel plate is identical to the lower steel plate in shape and equal in size, the inner annular surfaces of the water stop ring are respectively and closely arranged with the circular arc edges of the upper steel plate and the lower steel plate, the left end and the right end of the fixing plate are respectively and closely arranged with the inner annular surfaces of the water stop ring, a closed water adding cavity is formed among the upper steel plate, the lower steel plate, the fixing plate and the water stop ring, the water adding cavity is arranged opposite to the deformation joint, the upper steel plate is fixedly connected with a water conveying pipe with the lower end which is communicated with the water adding cavity, and the upper part of the water conveying pipe penetrates out of the lining and is connected with the pressure pump.
The fixed plate is a steel plate, the water delivery pipe is a slender steel pipe, the inner diameter of the water delivery pipe is larger than 10mm, the thickness of the water delivery pipe is larger than 2mm, and the wall thickness of the water delivery pipe is as thick as possible under the condition of a certain inner diameter. A round hole communicated with the water adding cavity is formed in the upper steel plate, the aperture of the round hole is smaller than or equal to the diameter of the water supply pipe, and the water supply pipe is fixed with the upper steel plate through welding and communicated with the round hole. The seam is located one side of fixed plate far away from upper steel plate or lower steel plate, and seam and fixed plate centering set up. When the water-adding cavity is pressurized, the water pressure can not directly act on the joint, so that the joint of the water stop belt is prevented from being damaged. And a gas leakage hole, a pressure gauge connecting hole and a water injection hole are also arranged above the water supply pipe, and the pressure pump is connected with the water injection hole. When water injection is started, air in the water adding cavity and the water supply pipe is discharged through the air discharge hole, when the air is completely discharged, the air discharge hole is closed, and the pressure pump gradually pressurizes and pumps water into the water adding cavity through the water injection hole.
In the experimental device for testing the water pressure born by the water stop belt buried in the deformation joint, the central angle of the upper steel plate is 120-180 degrees. The central angle of the upper steel plate is an included angle formed by one straight edge and the other straight edge of the upper steel plate, and when the central angle of the upper steel plate is not equal to 180 degrees, the fixing plate is a folded plate.
In the experimental device for bearing water pressure by embedding the water stop in the test deformation joint, the central angle of the upper steel plate is 180 degrees, the fixed plate is a straight plate, the upper end of the fixed plate is welded with the straight edge of the upper steel plate, the lower end of the fixed plate is welded with the straight edge of the lower steel plate, and the water adding cavity is semi-cylindrical. When the central angle of the upper steel plate is 180 degrees, the upper steel plate is changed into a semicircle, the lower steel plate is changed into a semicircle, and the water adding cavity is a semicylindrical cavity. The left and right length of the fixing plate is equal to the diameter of the upper steel plate, the upper and lower width of the fixing plate is equal to the width of the deformation joint, and the thickness of the fixing plate is larger than 2mm. When water enters the water adding cavity, the semicircular peripheral surface of the water adding cavity (namely the inner wall of the water stop ring) is pressurized, and when water seepage or lining cracking of the water stop ring or numerical reduction on the pressure gauge is observed, the maximum water pressure which can be born by the water stop ring is reached. The radius of the upper steel plate and the lower steel plate is larger than 100mm, and the thickness of the upper steel plate and the lower steel plate is larger than 2mm so as to ensure rigidity.
In the experimental device for bearing water pressure by embedding the water stop belt in the test deformation joint, the circular water stop plate which is arranged in the lining and is coaxial with the water supply pipe is welded outside the water supply pipe, and the water stop plate is arranged above the water stop ring, and the distance between the top end of the water stop ring and the water stop plate is greater than 50mm. The breakwater mainly plays a waterproof role, mainly plays a role in preventing water flow from exuding along the water supply pipe, has no requirement on strength, is not suitable for being excessively large in thickness on the premise of ensuring welding quality, and has the thickness range of 0.2-5 mm, and the diameter of the breakwater is larger than 100mm.
In the experimental device for testing the bearing water pressure of the water stop belt in the deformation joint, the length of the water stop belt fully embedded in the lining is larger than the width of the water stop belt. Fully embedded means that both sides of the water stop are in contact with the lining.
In the experimental device for testing the bearing water pressure of the water stop belt buried in the deformation joint, the distance from the water stop ring to the free surface outside the lining is half of the thickness of the lining.
In the experimental device for testing the bearing water pressure of the water stop belt buried in the deformation joint, a steel cushion block is arranged between the upper steel plate and the lower steel plate.
An experimental method for testing the bearing water pressure of a buried water stop in a deformation joint comprises the following steps:
a. Welding the upper steel plate, the lower steel plate, the fixing plate and the water supply pipe together to form a pressurizing assembly, and welding a circular water baffle on the water supply pipe;
b. Taking a water stop belt with a certain length, enclosing the water stop belt into an annular water stop ring along the length direction of the water stop belt, and bonding the water stop ring and the water stop ring together at a joint by using an adhesive; the adhesive is cold gel;
c. Erecting a bottom template and a side template, forming a pouring cavity between the bottom template and the side template, centering a water stop ring in the pouring cavity, pouring a lining from bottom to top, and pouring the lower part of the water stop ring into the lining;
d. Placing the pressurizing assembly into the water stop ring and enabling the lower steel plate to lean against the poured part lining, so as to ensure that the arc edges of the upper steel plate and the lower steel plate are tightly attached to the inner wall of the water stop ring, and the center line of the width of the water stop belt and the center line of the width of the fixing plate are positioned in the same horizontal plane; foam is put into one side of the water stop ring far away from the joint to form a deformation joint; the arc edges of the upper steel plate and the lower steel plate are tightly attached to the inner wall of the water stop ring, so that concrete can be prevented from flowing into the water inlet cavity when the lining is poured; the foam is used as a supporting material, and the thickness of the foam is the width of the deformation joint;
e. Pouring the rest part of the lining; after lining maintenance is completed, removing foam;
f. Placing the poured lining on one large steel plate, placing the other large steel plate on the lining, and screwing the two large steel plates through bolts;
g. the water supply pipe is connected with the pressure pump for pressurizing step by step, and the maximum water pressure is obtained when the water stop is observed to have water stretching out or lining cracking or pressure gauge reduction.
In the experimental method for testing the bearing water pressure of the buried water stop in the deformation joint, the pressure applied to each stage in step g is 0.1-1 MPa, and the pressure stabilizing time of each stage is more than 5 minutes.
Compared with the prior art, the invention has the following advantages:
the method can simulate the actual structure of the lining deformation joint, can test the water pressure resistance of the lining at the deformation joint which adopts the embedded water stop to prevent water, verify whether the water pressure resistance level meets the design requirement, feed back the design, and adjust the lining parameters and the waterproof mode; the unilateral pressurization makes the water stop joint keep away from the one side of movement joint, guarantees that the water stop weak point can not receive the pressure of water earlier and follow the seam and destroy.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.
Fig. 2 is a schematic view of a part of the structure of the pressurizing assembly provided by the invention.
FIG. 3 is a water stop ring layout provided by the present invention.
In the figure, 1, lining; 2. a joint; 3. a water stop ring; 4. a deformation joint; 5. a steel plate is arranged; 6. a lower steel plate; 7. a fixing plate; 8. a water adding cavity; 9. a water supply pipe; 10. a water baffle; 11. a steel cushion block; 12. a bottom template; 13. a side form; 14. and (3) foaming.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The experimental device for testing the water pressure bearing capacity of the buried water stop in the deformation joint shown in fig. 1 comprises a lining 1 with the diameter of 1m and the height of 1.1m and a water stop ring 3 with a joint 2, wherein the water stop ring 3 is surrounded by a rectangular water stop, the water stop ring 3 is centrally arranged in the lining 1, and the axial length of the water stop ring 3 is smaller than the height of the lining 1. As shown in fig. 1, a deformation joint 4 extending radially outwards from the outer side of the water stop ring 3 is arranged at 1/2 of the height of the lining 1, the joint 2 of the water stop ring 3 is located at one side far away from the deformation joint 4, a pressurizing component for pressurizing one side, far away from the joint 2, of the water stop ring 3 is arranged in the water stop ring 3, and the pressurizing component is arranged opposite to the deformation joint 4. The water stop ring 3 and the pressurizing assembly are buried in the lining 1 and do not move relative to the lining 1. Because the tunnel passes through different bottom layers, the requirements of the same person on each section of bottom layer are different, so that the thickness of the lining 1 and the waterproof mode of the deformation joint 4 are also different, and the experimental device can simulate the actual structure of the deformation joint 4 of the lining 1.
As shown in fig. 2, the pressurizing assembly includes an upper steel plate 5 having a fan shape, a lower steel plate 6 disposed opposite to the upper steel plate 5, and a fixing plate 7 vertically fixed between the upper steel plate 5 and the lower steel plate 6, the upper steel plate 5 and the lower steel plate 6 being identical in shape and size. As shown in fig. 3, the inner ring surface of the water stop ring 3 is respectively and closely arranged with the circular arc edges of the upper steel plate 5 and the lower steel plate 6, the left and right ends of the fixed plate 7 are respectively and closely arranged with the inner ring surface of the water stop ring 3, a closed water adding cavity 8 is formed among the upper steel plate 5, the lower steel plate 6, the fixed plate 7 and the water stop ring 3, the water adding cavity 8 is oppositely arranged with the deformation joint 4, a water supply pipe 9 with the lower end communicated with the water adding cavity 8 is fixedly connected on the upper steel plate 5, and the upper part of the water supply pipe 9 penetrates out of the lining 1 and then is connected with a pressure pump.
The fixing plate 7 is made of steel plates, the water delivery pipe 9 is made of slender steel pipes, the inner diameter of the water delivery pipe 9 is larger than 10mm, the thickness of the water delivery pipe 9 is larger than 2mm, and the wall thickness of the water delivery pipe 9 is as thick as possible under the condition of a certain inner diameter. A round hole communicated with the water adding cavity 8 is formed in the upper steel plate 5, the aperture of the round hole is smaller than or equal to the diameter of the water supply pipe 9, and the water supply pipe 9 is fixed with the upper steel plate 5 through welding and communicated with the round hole. The seam 2 is located on the side of the fixing plate 7 remote from the upper steel plate 5 or the lower steel plate 6, and the seam 2 is arranged centrally with respect to the fixing plate 7. When the water adding cavity 8 is pressurized, water pressure can not directly act on the joint 2, so that the joint 2 of the water stop belt is prevented from being damaged. And a gas leakage hole, a pressure gauge connecting hole and a water injection hole are also arranged above the water supply pipe 9, and the pressure pump is connected with the water injection hole. When water injection is started, air in the water adding cavity 8 and the water supply pipe 9 is discharged through the air discharge hole, when the air is completely discharged, the air discharge hole is closed, and the pressure pump gradually pressurizes and pumps water into the water adding cavity 8 through the water injection hole. In this embodiment, a bleed valve is provided in the bleed hole.
Wherein the central angle of the upper steel plate 5 is 120-180 degrees. The central angle of the upper steel plate 5 is an included angle formed by one straight edge and the other straight edge of the upper steel plate 5, and when the central angle of the upper steel plate 5 is not equal to 180 degrees, the fixing plate 7 is a folded plate. As shown in fig. 2, the central angle of the upper steel plate 5 is 180 °, the fixed plate 7 is a straight plate, the upper end of the fixed plate is welded with the straight edge of the upper steel plate 5, the lower end of the fixed plate 7 is welded with the straight edge of the lower steel plate 6, and the water adding cavity 8 is semi-cylindrical. When the central angle of the upper steel plate 5 is 180 degrees, the upper steel plate 5 becomes semicircular, the lower steel plate 6 becomes semicircular, and the water adding cavity 8 is a semi-cylindrical cavity. Wherein the left and right length of the fixing plate 7 is equal to the diameter of the upper steel plate 5, the up and down width of the fixing plate 7 is equal to the width of the deformation joint 4, and the thickness of the fixing plate 7 is larger than 2mm. When water enters the water adding cavity 8, the semicircular peripheral surface of the water adding cavity 8 (namely the inner wall of the water stop ring 3) is pressurized, and when water seepage of the water stop ring 3 or cracking of the lining 1 or numerical reduction on the pressure gauge is observed, the maximum water pressure which can be born by the water stop ring 3 is reached. The radius of the upper steel plate 5 and the lower steel plate 6 should be greater than 100mm, and the thickness thereof should be greater than 2mm to ensure rigidity.
As shown in fig. 1, a circular water baffle 10 which is arranged in the lining 1 and is coaxial with the water pipe 9 is welded outside the water pipe 9, the water baffle 10 is arranged above the water stop ring 3, and the distance between the top end of the water stop ring 3 and the water baffle 10 is more than 50mm. The water baffle 10 mainly plays a role in water prevention, mainly plays a role in preventing water from seeping out along the water supply pipe 9, has no requirement on strength, is not suitable for being excessively large in thickness on the premise of ensuring welding quality, and has the thickness ranging from 0.2mm to 5mm, and the diameter of the water baffle 10 is larger than 100mm.
In this embodiment, the length of the water stop of the fully embedded lining 1 is greater than the width of the water stop. Fully embedded means that both sides of the water stop are in contact with the lining 1. The distance from the water stop ring 3 to the outer free surface of the lining 1 is half the thickness of the lining 1, in this embodiment the distance from the water stop to the outer free surface of the lining 1 is 400mm.
As shown in fig. 1, a steel spacer 11 is provided between the upper steel plate 5 and the lower steel plate 6.
An experimental method for testing the bearing water pressure of a buried water stop in a deformation joint comprises the following steps:
A water supply pipe 9 with the outer wall thickness of 5mm, the length of 100mm and the inner diameter of 10mm is selected and supported by Q345 steel; selecting a semicircular upper steel plate 5 and a semicircular lower steel plate 6 with the thickness of 0.2mm and the radius of 100mm, and digging round holes on the upper steel plate 5;
a. The upper steel plate 5, the lower steel plate 6, the fixing plate 7 and the water supply pipe 9 are welded together to form a pressurizing assembly, and a circular water baffle 10 is welded on the water supply pipe 9 to prevent water from seeping out along the water supply pipe 9;
b. Taking a water stop belt with a certain length, enclosing the water stop belt into an annular water stop ring 3 along the length direction of the water stop belt, and bonding the water stop ring and the water stop ring together at a joint 2 by using an adhesive; the adhesive is cold gel;
c. A bottom template 12 and a side template 13 are supported, a pouring cavity is formed between the bottom template 12 and the side template 13, a water stop ring 3 is placed in the pouring cavity in a centering manner, a lining 1 is poured from bottom to top, and the lower part of the water stop ring 3 is poured into the lining 1;
d. The pressurizing assembly is placed into the water stop ring 3, the lower steel plate 6 is abutted against the poured part lining 1, the arc edges of the upper steel plate 5 and the lower steel plate 6 are tightly attached to the inner wall of the water stop ring 3, and at the moment, the center line of the width of the water stop belt and the center line of the width of the fixing plate 7 are positioned in the same horizontal plane; placing foam 14 on one side of the water stop ring 3 far away from the joint 2 to form a deformation joint 4, wherein the width of the deformation joint 4 is 20mm; the arc edges of the upper steel plate 5 and the lower steel plate 6 are tightly attached to the inner wall of the water stop ring 3, so that concrete can be prevented from flowing into the water adding cavity 8 when the lining 1 is poured; foam 14 is used as a supporting material, and the thickness of the foam is the width of deformation joint 4;
e. Pouring the rest part of the lining 1; after the lining 1 is cured, the foam 14 is removed;
f. Placing the poured lining 1 on one large steel plate, placing the other large steel plate on the lining 1, and screwing the two large steel plates through bolts;
g. The water supply pipe 9 is connected with a pressure pump for pressurizing step by step, and when the water stop is observed to have water stretching out or the lining 1 is cracked or the pressure gauge is lowered, the maximum water pressure is obtained.
Wherein, the pressure applied by each stage in the step g is 0.1 MPa-1 MPa, and the pressure stabilizing time of each stage is more than 5 minutes.
During experiments, the air release valve is opened, water is injected inwards, and when water flows out from the air release hole, the air release valve is closed. And continuing to pressurize, stopping pressurizing when the water pressure is increased to 0.25MPa, maintaining the pressure for 10 minutes, and if obvious depressurization occurs in the middle, timely supplementing the pressure.
Taking 0.5MPa as a first stage, boosting upwards, maintaining pressure for 10 minutes at each stage, and supplementing pressure in time when the pressure is reduced halfway to be more than 0.5 MPa. And when the pressure reaches 4.5MPa, stabilizing the pressure for 48 hours. And then continuing to pressurize, and when the water stop is broken and water leakage occurs or the water stop and the gap of the concrete are leaked, considering that the maximum water pressure value is reached.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The utility model provides an experimental apparatus for buries waterstop and bears water pressure in test movement joint, includes lining (1) and is enclosed by rectangle waterstop and has water-stop ring (3) of seam (2), water-stop ring (3) locate in the middle in lining (1), the axial length of water-stop ring (3) is less than the height of lining (1), its characterized in that, 1/2 department of lining (1) height is equipped with movement joint (4) that radially outwards extends by water-stop ring (3) outside, seam (2) of water-stop ring (3) are located the one side that keeps away from movement joint (4), the inside of water-stop ring (3) is equipped with the pressure subassembly that is used for keeping away from one side that seam (2) was pressed to water-stop ring (3), pressure subassembly and movement joint (4) set up relatively; the pressurizing assembly comprises a fan-shaped upper steel plate (5), a lower steel plate (6) which is opposite to the upper steel plate (5) and a fixed plate (7) which is vertically fixed between the upper steel plate (5) and the lower steel plate (6), wherein the upper steel plate (5) and the lower steel plate (6) are identical in shape and size, the inner annular surface of the water stop ring (3) is respectively and closely arranged with the circular arc edges of the upper steel plate (5) and the lower steel plate (6), the left end and the right end of the fixed plate (7) are respectively and closely arranged with the inner annular surface of the water stop ring (3), a closed water adding cavity (8) is formed among the upper steel plate (5), the lower steel plate (6), the fixed plate (7) and the water stop ring (3), the water adding cavity (8) is opposite to the deformation joint (4), a water supply pipe (9) with the lower end communicated with the water adding cavity (8) is fixedly connected to the upper steel plate (5), and the upper part of the water supply pipe (9) is connected with a pressure pump after being worn out of the lining (1); the length of the water stop belt of the fully embedded lining (1) is larger than the width of the water stop belt.
2. The experimental device for testing the water pressure bearing capacity of a buried water stop in a deformation joint according to claim 1, wherein the central angle of the upper steel plate (5) is 120-180 degrees.
3. The experimental device for testing the bearing water pressure of the buried water stop in the deformation joint according to claim 2, wherein the central angle of the upper steel plate (5) is 180 degrees, the fixed plate (7) is a straight plate, the upper end of the fixed plate is welded with the straight edge of the upper steel plate (5), the lower end of the fixed plate (7) is welded with the straight edge of the lower steel plate (6), and the water adding cavity (8) is semi-cylindrical.
4. The experimental device for testing the bearing water pressure of a buried water stop in a deformation joint according to claim 1, wherein a circular water baffle (10) which is arranged in a lining (1) and is coaxial with the water feed pipe (9) is welded outside the water feed pipe (9), the water baffle (10) is arranged above the water stop ring (3), and the distance between the top end of the water stop ring (3) and the water baffle (10) is larger than 50mm.
5. The experimental device for testing the water pressure bearing capacity of the buried water stop in the deformation joint according to claim 1, wherein the distance from the water stop ring (3) to the outer free surface of the lining (1) is half of the thickness of the lining (1).
6. The experimental device for testing the bearing pressure of the water stop belt buried in the deformation joint according to claim 1, wherein a steel cushion block (11) is arranged between the upper steel plate (5) and the lower steel plate (6).
7. An experimental method for testing the water pressure born by a buried water stop in a deformation joint, which is applicable to the test of the water pressure born by the buried water stop in the deformation joint, and is characterized by comprising the following steps:
a. welding an upper steel plate (5), a lower steel plate (6), a fixed plate (7) and a water supply pipe (9) together to form a pressurizing assembly, and welding a circular water baffle (10) on the water supply pipe (9);
b. taking a water stop belt with a certain length, enclosing the water stop belt into an annular water stop ring (3) along the length direction of the water stop belt, and bonding the water stop ring and the water stop ring together at a joint (2) by using an adhesive;
c. A bottom template (12) and a side template (13) are supported, a pouring cavity is formed between the bottom template (12) and the side template (13), a water stop ring (3) is centered in the pouring cavity, a lining (1) is poured from bottom to top, and the lower part of the water stop ring (3) is poured into the lining (1);
d. The pressurizing assembly is placed into the water stop ring (3) and enables the lower steel plate (6) to lean against the poured part lining (1), so that the arc edges of the upper steel plate (5) and the lower steel plate (6) are tightly attached to the inner wall of the water stop ring (3), and at the moment, the center line of the width of the water stop belt and the center line of the width of the fixing plate (7) are positioned in the same horizontal plane; foam (14) is put into one side of the water stop ring (3) far away from the joint (2) to form a deformation joint (4);
e. Casting the rest of the lining (1); after the lining (1) is cured, the foam (14) is removed;
f. Placing the poured lining (1) on one large steel plate, placing the other large steel plate on the lining (1), and screwing the two large steel plates through bolts;
g. The water supply pipe (9) is connected with a pressure pump for pressurizing step by step, and the maximum water pressure is obtained when water seepage of the water stop, cracking of the lining (1) or reduction of the pressure gauge is observed.
8. The experimental method for testing the water pressure born by the buried water stop in the deformation joint according to claim 7, wherein the pressure applied to each stage in the step g is 0.1-1 MPa, and the pressure stabilizing time of each stage is more than 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350957.1A CN109900559B (en) | 2019-04-28 | 2019-04-28 | Experimental device and experimental method for testing bearing water pressure of buried water stop in deformation joint |
Applications Claiming Priority (1)
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| CN107576574A (en) * | 2017-09-13 | 2018-01-12 | 中交公局桥隧工程有限公司 | The watertight test method of the waterstop equidimension limit is buried in a kind of movement joint |
| CN209878494U (en) * | 2019-04-28 | 2019-12-31 | 中铁二院重庆勘察设计研究院有限责任公司 | Experimental device for testing water pressure borne by buried water stop in deformation joint |
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| IT1304092B1 (en) * | 1998-12-10 | 2001-03-07 | Sibelon Srl | METHOD FOR WATERPROOFING JOINTS AND / OR CRACKS IN HYDRAULIC WORKS AND CONCRETE AND / OR MASONRY STRUCTURES |
| JP2002322899A (en) * | 2001-04-24 | 2002-11-08 | Shimizu Corp | Joint structure of lining body in cast-in-place lining shielding construction method, its execution method and flexible cut-off plate |
| CN102331328B (en) * | 2011-06-17 | 2013-05-08 | 吴兆圣 | Field hydrostatic test method for water-proof system of building deformation joint |
| WO2016082690A1 (en) * | 2014-11-28 | 2016-06-02 | 中铁第四勘察设计院集团有限公司 | Prefabricated aseismic structure having lining shield tunnel |
| CN104865012A (en) * | 2015-05-08 | 2015-08-26 | 同济大学 | Tunnel joint waterproof performances test apparatus and test method |
| CN105486848A (en) * | 2016-01-18 | 2016-04-13 | 衡水中铁建工程橡胶有限责任公司 | Method for detecting water resistance of tunnel rubber waterstop |
| CN106706436A (en) * | 2016-12-21 | 2017-05-24 | 北京交通大学 | Device for detecting water pressure resistance of rubber waterstop |
| CN107702996A (en) * | 2017-10-18 | 2018-02-16 | 中交公局桥隧工程有限公司 | The watertight test method of the waterstop equidimension limit is buried in a kind of construction joint |
| CN207396026U (en) * | 2017-10-19 | 2018-05-22 | 江苏新泰隆管件有限公司 | A kind of boiler interface tube hydraulic pressure testing device |
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| CN209878494U (en) * | 2019-04-28 | 2019-12-31 | 中铁二院重庆勘察设计研究院有限责任公司 | Experimental device for testing water pressure borne by buried water stop in deformation joint |
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