CN117760650A - Device and method for evaluating water tightness of sealing joint seepage prevention water stop structure of hydraulic building - Google Patents
Device and method for evaluating water tightness of sealing joint seepage prevention water stop structure of hydraulic building Download PDFInfo
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- CN117760650A CN117760650A CN202311592956.0A CN202311592956A CN117760650A CN 117760650 A CN117760650 A CN 117760650A CN 202311592956 A CN202311592956 A CN 202311592956A CN 117760650 A CN117760650 A CN 117760650A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 403
- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002265 prevention Effects 0.000 title claims description 29
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 238000011156 evaluation Methods 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 16
- 239000002344 surface layer Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 239000003566 sealing material Substances 0.000 claims description 27
- 229920006333 epoxy cement Polymers 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 16
- 239000004570 mortar (masonry) Substances 0.000 claims description 15
- 239000010410 layer Substances 0.000 claims description 14
- 239000004593 Epoxy Substances 0.000 claims description 13
- 239000011083 cement mortar Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 229920002396 Polyurea Polymers 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 3
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000004587 polysulfide sealant Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 238000003908 quality control method Methods 0.000 description 3
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
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Abstract
The invention provides a device and a method for evaluating the water tightness of a sealing, seepage preventing and water stopping structure of a hydraulic building, wherein the device comprises a test piece, a monitoring assembly and a water pressure control system; the test assembly comprises a sealing joint anti-seepage water stop structure, a water inlet pipe, an exhaust pipe, a water outlet pressure gauge and an exhaust valve; the monitoring component comprises a water delivery pipe, a water delivery pressure gauge, a flowmeter, a water stop valve and a water stop valve; the water pressure control system comprises a four-way joint, water pressing equipment, a water inlet pressure gauge, a connecting pipe and a water storage tank. The invention also provides a water tightness evaluation method of the sealing joint seepage-proof water-stopping structure of the hydraulic building, and the method can judge the water-stopping effect of the surface layer or the embedded or middle-buried water-stopping structure under the condition of not damaging the seepage-proof water-stopping structure and the embedded or middle-buried water-stopping structure.
Description
Technical Field
The invention belongs to the technical field of water conservancy and hydropower engineering, and relates to a device and a method for evaluating the water tightness of a sealing, seepage-proofing and water-stopping structure of a hydraulic building.
Background
The concrete structure of the hydraulic building is provided with artificial joints such as settlement joints, expansion joints, construction joints and the like according to the structural form and characteristics of the concrete structure and the condition of the foundation. In the construction process, seam quality control is a weak link in engineering construction, and in recent years, water leakage and water seepage problems caused by the fact that manual seam quality control is not in place sometimes occur, so that the structural safety is affected. Therefore, effective seepage-proofing and water-stopping measures are usually required in the design and construction of hydraulic building concrete structures. At present, common anti-seepage water stopping methods comprise: an embedded anti-seepage water stop, a medium embedded anti-seepage water stop, a surface anti-seepage water stop or a combination method of a plurality of the above. The embedded water stop and the embedded water stop are very important because of the problems of difficult quality control and the like, and difficult repair after leakage damage. The surface seepage-proofing and water-stopping method generally adopts the measures of embedding a seepage-proofing body on a surface layer and covering a seepage-proofing coating on the surface, wherein the surface layer is convenient to maintain, replace and repair.
Although the construction technology of the surface seal anti-seepage water stop is relatively mature, the surface seal anti-seepage water stop structure is easy to damage, the water stop is invalid, leakage is caused, and the safety of the building is endangered after investigation and investigation. In the design, construction and operation processes of a hydraulic building, the surface joint sealing anti-seepage water stop needs to consider whether the performance of an anti-seepage water stop material can meet the requirements of different high water pressures; secondly, whether the sealing joint seepage-proof water-stopping structure type can meet the joint deformation requirement is also considered; in addition, in the structure of a large hydraulic building, a high-efficiency detection method which is suitable for the large structure and cannot damage the original structure needs to be considered. Therefore, the water tightness of the sealing joint seepage prevention water stop structure of the hydraulic building under the deformation and high water pressure design action is necessary to be detected and evaluated. At present, the common anti-seepage effect of the anti-seepage water-stop coating is an anti-seepage effect test, but the test only evaluates the anti-seepage effect of the coating itself, and cannot evaluate the anti-seepage water-stop structure constructed on the concrete structure. In the normal operation process, the surface or inner sealing seam water stop structure bears the operation water pressure, and the water stop structure is as high as 2/3Mpa and as low as 0.1Mpa, so that the water tightness detection is meaningful only when the water tightness detection reaches the operation water pressure.
The primary conditions for performing the detection of the seepage-proofing, water-stopping and water-tightness of the surface seal joint of the manual joint are as follows: the embedded/medium-embedded water stop structure is absolutely good in sealing, and can never leak in the high-pressure water tightness detection process. However, 60% of embedded/buried water stop structures in practical engineering have leakage problems. Because of the problems of the embedded/buried water stop structure, the water tightness detection of the surface seal joint seepage prevention water stop cannot be realized.
Therefore, development of the sealing joint seepage-proof water-stopping structure has important engineering value in water tightness detection.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a device for evaluating the water tightness of a sealing and seepage-proofing water stop structure of a hydraulic building, which can detect the water tightness of the sealing and seepage-proofing water stop structure.
The invention further aims to provide a method for evaluating the water tightness of the sealing joint seepage-proofing and water-stopping structure of the hydraulic building.
In order to achieve the aim, the invention provides a water tightness evaluation device of a sealing, seepage prevention and water stop structure of a hydraulic building, which comprises a test piece, a monitoring assembly and a water pressure control system;
the test assembly comprises a seal joint seepage-proofing and water-stopping structure for water tightness to be tested, a manual joint section to be tested, a water inlet pipe, an exhaust pipe, a water outlet pressure gauge and an exhaust valve;
the monitoring component comprises a water delivery pipe, a water delivery pressure gauge, a flowmeter and a water stop valve;
the water pressure control system comprises a four-way joint, water pressing equipment, a pressure valve, a water inlet pressure gauge, a connecting pipe and a water storage tank;
the surface of the inner side of the artificial seam and the surface of the outer side of the artificial seam section are covered with an interfacial agent layer;
the sealing anti-seepage water stopping structure comprises a structure formed by a top caulking sealing material and a covered surface layer sealing material at the top of the to-be-detected manual seam section; the sealing anti-seepage water stop structure and the artificial joint section are enclosed to form a cavity;
the inner side surface of the artificial seam section is covered with an interfacial agent layer;
the tail end of the water inlet pipe of the test assembly is bent at 60-150 degrees, and the tail end of the water inlet pipe penetrates into the cavity; the other end of the water inlet pipe is connected with one end of a water delivery pipe of the monitoring component; one end of the exhaust pipe extends into the cavity; the part of the exhaust pipe outside the cavity is provided with the water outlet pressure gauge, and the tail end of the exhaust pipe outside the cavity is provided with the exhaust valve;
the other end of the water delivery pipe is connected with a four-way joint arranged at one side of the water pressing equipment; the water delivery pipe is sequentially provided with a water delivery pressure gauge, a flowmeter and a water stop valve from the near to the far from the water inlet pipe;
a pressure reducing pump and a booster pump are arranged in the water pressing equipment; the water pressing equipment is provided with a water inlet pressure gauge; the water pressing device is connected with the water storage tank through a connecting pipe.
As described above, the test assembly further includes a buried seal anti-seepage water stop located in the middle of the manual seam or a buried seal anti-seepage water stop located at the bottom of the manual seam.
As described above, the seal joint seepage-proof water stop structure of the water tightness to be detected further fills supporting materials at two ends of the artificial joint when the two ends of the section of the artificial joint to be detected are open.
As described above, 2/3 of the range of the pressure gauge is equal to or less than the design pressure.
As described above, the interfacial agent layer is made of an epoxy interfacial agent; the surface layer sealing material is one or more of polyurea, polyurethane, organic silicon and fluorosilicone polymer; the top caulking sealing material is made of one or more of polyurea, polyurethane, organic silicon, fluorine-silicon polymer, elastic epoxy cement, elastic epoxy mortar, elastic polyurethane mortar and elastic polyurea mortar.
The invention also provides a method for evaluating the water tightness of the sealing, seepage-proofing and water-stopping structure of the hydraulic building, which comprises the following steps:
1) Removing the original embedded polysulfide sealant interlayer or polyethylene foam interlayer from the outer surface of the artificial joint and the inner side of the artificial joint of the hydraulic building to the inner embedded joint seepage prevention water stop or the middle embedded joint seepage prevention water stop of the inner side of the artificial joint;
2) Cleaning the inner side of the artificial joint, polishing the outer side surface of the artificial joint, and repairing and leveling the defect part of the outer side surface of the artificial joint by using epoxy mortar, cement mortar or epoxy cement mortar;
3) Selecting a section of the artificial seam to be detected of the artificial seam, and embedding sponge or foam as a supporting material at two ends of the section of the artificial seam to be detected;
4) Respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall at the inner side of the manual seam by using epoxy cement; then coating interface agents on the inner side of the artificial joint and the outer side of the artificial joint to form an interface agent layer, embedding a top caulking sealing material on the top of the inner side of the artificial joint, and then covering the surface sealing material to form a sealed cavity, thereby manufacturing a test component in the joint sealing, seepage preventing and water stopping structure water tightness evaluation device of the hydraulic building;
5) Installing the monitoring component and the water pressure control system in the sealing joint seepage-proofing and water-stopping structure water tightness evaluation device of the hydraulic building and the test component in the step 4) to form a complete sealing joint seepage-proofing and water-stopping structure water tightness evaluation device;
6) Opening an exhaust valve of an exhaust pipe orifice, injecting water in a water storage tank into the closed cavity in the step 4) through a connecting pipe, a water pressing device, a water pipe and a water inlet pipe until the exhaust pipe is discharged, closing a valve of the exhaust pipe orifice, opening a valve of a pressure gauge on the exhaust pipe, enabling the pressure gauge to start to indicate pressure, and starting to inject water to pressurize step by step until the water pressure is designed;
7) Closing the water stop valve, maintaining pressure, and judging the water tightness: a) When the pressure drops sharply and the surface sealing anti-seepage water stop structure is visually examined and has no water seepage condition, the fact that a seepage channel exists in the embedded sealing anti-seepage water stop structure or the embedded sealing anti-seepage water stop structure is indicated; b) If the surface seam sealing seepage-proofing and water-stopping structure is visually inspected and has a seepage condition, judging that a seepage channel exists in the surface seam sealing seepage-proofing and water-stopping structure, and judging that the water tightness is unqualified; c) And when the whole pressurizing process and the designed operating water pressure are reached and the pressure maintaining is carried out for more than 30 minutes according to the designed operating water pressure, judging that a seepage-proof water-stopping structure with a surface sealing joint does not have a seepage channel, and judging that the water tightness is qualified.
As described above, step 4) is replaced with step 4 a): respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall of the manual seam by using epoxy cement; then, painting interface agents on the two sides and the top of the manual seam, and coating epoxy cement on the embedded type sealing seam seepage-proof water stop or the middle embedded type sealing seam seepage-proof water stop to seal the embedded type sealing seam seepage-proof water stop or the middle embedded type sealing seam seepage-proof water stop; and the surface is embedded with a caulking sealing material, and then the surface layer sealing material is covered, so that a closed cavity is formed, and the test assembly in the sealing, seepage-proofing and water-stopping structure water tightness evaluation device of the hydraulic building is manufactured.
The invention also provides a method for evaluating the water tightness of the sealing, seepage-proofing and water-stopping structure of the hydraulic building, which comprises the following steps:
1) According to the reinforcement and the label of the hydraulic building without the manual seam, pouring a concrete platform with the same reinforcement and label, wherein the size is 1700mm long by 800mm wide by 450mm high; a groove with the length of 800mm, the width W1 and the depth of 50mm is formed in the concrete platform; w1 is the same as the manual seam width;
2) Cleaning the inner side of the artificial joint, polishing the outer side surface of the artificial joint, and repairing and leveling the defect part of the outer side surface of the artificial joint by using epoxy mortar, cement mortar or epoxy cement mortar;
3) Respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall at the inner side of the manual seam by using epoxy cement; then coating interface agents on the inner side of the artificial joint and the outer side of the artificial joint to form an interface agent layer, then embedding a top caulking sealing material on the top of the inner side of the artificial joint, and then covering the surface sealing material to form a sealed cavity, thus manufacturing the test component in the sealing anti-seepage water-stopping structure water tightness evaluation device of the hydraulic building;
4) Installing the monitoring component and the water pressure control system in the sealing joint seepage-proofing and water-stopping structure water tightness evaluation device of the hydraulic building and the test component in the step 3) to form a complete sealing joint seepage-proofing and water-stopping structure water tightness evaluation device;
5) Opening an exhaust valve of an exhaust pipe orifice, injecting water in a water storage tank into the closed cavity in the step 3) through a connecting pipe, a water pressing device, a water pipe and a water inlet pipe until the exhaust pipe is discharged, closing a valve of the exhaust pipe orifice, opening a valve of a pressure gauge on the exhaust pipe, enabling the pressure gauge to start to indicate pressure, and starting to inject water to pressurize step by step until the water pressure is designed;
6) Closing the water stop valve, maintaining pressure, and judging the water tightness: a) If the surface seam sealing seepage-proofing and water-stopping structure is visually inspected and has a seepage condition, judging that a seepage channel exists in the surface seam sealing seepage-proofing and water-stopping structure, and judging that the water tightness is unqualified; b) And when the whole pressurizing process and the designed operating water pressure are reached and the pressure maintaining is carried out for more than 30 minutes according to the designed operating water pressure, judging that a seepage-proof water-stopping structure with a surface sealing joint does not have a seepage channel, and judging that the water tightness is qualified.
The invention has the beneficial effects that:
the invention provides a device and a method for evaluating the water tightness of a sealing joint seepage-proof water-stopping structure of a hydraulic building, which can judge the water stopping effect of the embedded or middle-buried water-stopping structure under the condition of not damaging the seepage-proof water-stopping structure and the embedded or middle-buried water-stopping structure.
Drawings
Fig. 1 is a schematic side view of a manual seam of a first preferred embodiment of a seam sealing, seepage-proofing and water-stopping structure water tightness evaluation device for a hydraulic building.
Fig. 2 is a schematic cross-sectional view of the artificial joint of fig. 1 through a section of the inlet pipe.
Fig. 3 is a schematic cross-sectional view of a manual seam through the cross-section of a water inlet pipe according to a second preferred embodiment.
Fig. 4 is a schematic cross-sectional view of a manual seam through a cross-section of a water inlet pipe according to a third preferred embodiment.
Fig. 5 is a schematic side view of a manual seam of a fourth preferred embodiment of the seam sealing, seepage-proofing and water-stopping structure water tightness evaluation device for a hydraulic building.
Fig. 6 is a schematic cross-sectional view of the artificial joint of fig. 5 through a section of the inlet pipe.
Reference numerals
11: sealing the seam to prevent seepage and stop water structure; 111: a cavity; 112: sealing the surface layer to prevent seepage and stop water; 113: a concrete member; 114: the two ends are embedded with supporting materials; 115: the top is embedded with a supporting material; 116: the embedded type sealing joint is impermeable and water-stopping; 117: middle buried type sealing joint seepage prevention water stop; 118: epoxy cement; 119: an interfacial agent layer; 12: a water inlet pipe; 13: an exhaust pipe; 131: a water outlet pressure gauge; 132: an exhaust valve; 21: a water pipe; 22: a water delivery pressure gauge; 23: a flow meter; 24: a water stop valve; 31: a four-way joint; 32: a water pressing device; 321: a pressure reducing pump; 322: a booster pump; 33: a water inlet pressure gauge; 34: a connecting pipe; 35: and a water storage tank.
Detailed Description
The embodiments of the present invention will be described in detail and fully described below to enable those skilled in the art to more readily understand the advantages and features of the present invention and to make a clear and concise description of the scope of the present invention.
The artificial joint of the concrete structure of the hydraulic building is usually formed by clamping adjacent concrete members, is also called an expansion joint and is mainly used for ensuring the expansion deformation allowance of the concrete members. The artificial joint needs to be impermeable by using a water-stopping structure, and products such as a water-stopping copper plate (also called copper water stopping), a rubber water-stopping belt and the like are commonly used, when the water stopping is buried at the bottom of the artificial joint, the water stopping is called as buried water stopping or buried joint sealing impermeable water stopping, and when the water stopping is buried at the middle of the artificial joint, the water stopping is called as buried water stopping or buried joint sealing impermeable water stopping.
One expansion joint of a tunnel in a hydraulic building can be as long as seven eight meters, one expansion joint of a box culvert can be as long as sixteen seven meters, and if one whole tunnel is detected, the problem that a leakage point cannot be found due to too long artificial joints can occur on one hand; on the other hand, the problem that the water tightness of other parts of the whole manual seam cannot be guaranteed to be good occurs. Based on the two problems, the manual seam is required to be detected in a partitioning mode, namely the seam is formed into a plurality of cavities, and water tightness detection is carried out by adopting water pressing equipment.
The inner side of the artificial joint refers to the part clamped by two adjacent concrete members, and the outer side surface of the artificial joint refers to the surface of the outer part of the artificial joint, which is in direct contact with water.
The interfacial agent layer is made of epoxy interfacial agent; the surface layer sealing material is one or more of polyurea, polyurethane, organic silicon and fluorosilicone polymer; the top caulking sealing material is made of one or more of polyurea, polyurethane, organic silicon, fluorine-silicon polymer, elastic epoxy cement, elastic epoxy mortar, elastic polyurethane mortar and elastic polyurea mortar. All of the above materials are commercially available directly.
Example 1
The device for evaluating the water tightness of the sealing, seepage preventing and water stopping structure of the hydraulic building is shown in figure 1, and comprises a test piece, a monitoring assembly and a water pressure control system;
the test assembly comprises a seal joint seepage-proofing and water-stopping structure 11, a to-be-detected manual joint section, a water inlet pipe 12, an exhaust pipe 13, a water outlet pressure gauge 131 and an exhaust valve 132;
the monitoring assembly comprises a water delivery pipe 21, a water delivery pressure gauge 22, a flowmeter 23 and a water stop valve 24;
the water pressure control system comprises a four-way joint 31, a water pressing device 32, a water inlet pressure gauge 33, a connecting pipe 34 and a water storage tank 35;
in the embodiment, the sealing and seepage-proofing water stopping structure 11 comprises a top caulking sealing material 114 at the top of the to-be-detected artificial seam section, a covered surface layer sealing material 115 and an embedded sealing and seepage-proofing water stopping 116; since the two ends of the artificial seam section are open, it is necessary to add two end caulking support materials 114 to the two ends of the artificial seam section to be detected, thereby forming a cavity 111 in the artificial seam section to be detected. The surface of the inner side of the artificial seam and the surface of the outer side of the artificial seam section are covered with an interfacial agent layer 119, the interfacial agent is used for improving the bonding strength with the surface layer sealing, seepage prevention and water stop, top filling supporting materials or two ends filling supporting materials, and the interfacial agent is made of epoxy interfacial agent.
The end of the inlet pipe 12 of the test assembly is bent at 90 °, the end of the inlet pipe 12 penetrating into the cavity 111; as shown in fig. 2, which is a cross-sectional view of the manual seam, the shape of the embedded seal anti-seepage water stop 116, which is commercial copper water stop, can be seen.
The other end of the water inlet pipe 12 is connected with one end of a water delivery pipe 21 of the monitoring component; one end of the exhaust pipe 13 is extended into the cavity 111; the part of the exhaust pipe 13 outside the cavity is provided with a water outlet pressure gauge 131, and the tail end of the exhaust pipe 13 outside the cavity is provided with an exhaust valve;
the other end of the water pipe 21 is connected with a four-way joint 31 arranged at one side of the water pressing device; a water delivery pressure gauge 22, a flow meter 23 and a water stop valve 24 are sequentially arranged on the water delivery pipe 21 from the water inlet pipe 12 from near to far;
a pressure reducing pump 321 and a pressure increasing pump 322 are arranged in the water pressing equipment; the water pressing device is provided with a water inlet pressure gauge 33; the water pressure device and the water storage tank 35 are connected by a connecting pipe 34.
Example 2
The difference between this embodiment and embodiment 1 is that the buried seal seepage-proofing water stop is used, and as shown in fig. 3, a schematic cross-sectional view of a manual seal with a buried seal seepage-proofing water stop 117 is shown, and the exhaust pipe, the water outlet pressure gauge, the exhaust valve, the monitoring assembly and the water pressure control system are the same as those of embodiment 1.
Example 3
The method for evaluating the water tightness of the embedded type seal joint seepage prevention water stop structure of the embodiment 1 or the embedded type seal joint seepage prevention water stop structure of the embodiment 2 comprises the following steps:
1) Removing the original embedded polysulfide sealant interlayer or polyethylene foam interlayer from the top of the manual seam of the hydraulic building to an embedded seam seepage-proofing and water-stopping structure or an embedded seam seepage-proofing and water-stopping structure;
2) Cleaning the inner side of the artificial joint, polishing the outer side surface of the artificial joint, and repairing and leveling the defect part of the outer side surface of the artificial joint by using epoxy mortar, cement mortar or epoxy cement mortar;
3) Filling sponge or foam into the artificial joint as a supporting material;
4) Respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall of the manual seam by using epoxy cement; then coating interface agents on the two sides and the top of the artificial joint to form an interface agent layer, filling a top caulking sealing material on the top of the inner side of the artificial joint, and covering a surface sealing material to form a sealed cavity, so as to manufacture the test component in the joint sealing, seepage preventing and water stopping structure water tightness evaluation device of the hydraulic building;
6) Installing the monitoring component and the water pressure control system in the sealing joint seepage-proofing and water-stopping structure water tightness evaluation device of the hydraulic building and the test component in the step 5) to form a complete sealing joint seepage-proofing and water-stopping structure water tightness evaluation device;
7) Injecting water in the water storage tank into the closed cavity in the step 4) through a connecting pipe, a water pressing device, a water pipe and a water inlet pipe until the water pressure is designed;
8) Opening a pressure maintaining valve, maintaining pressure, and judging water tightness: a) When the pressure drops sharply and the surface sealing anti-seepage water stop structure is visually examined and has no water seepage condition, the fact that a seepage channel exists in the embedded sealing anti-seepage water stop structure or the embedded sealing anti-seepage water stop structure is indicated; b) If the surface seam sealing seepage-proofing and water-stopping structure is visually inspected and has a seepage condition, judging that a seepage channel exists in the surface seam sealing seepage-proofing and water-stopping structure, and judging that the water tightness is unqualified; c) And when the whole pressurizing process and the designed operating water pressure are reached and the pressure maintaining is carried out for more than 30 minutes according to the designed operating water pressure, judging that a seepage-proof water-stopping structure with a surface sealing joint does not have a seepage channel, and judging that the water tightness is qualified.
After the surface sealing anti-seepage water stopping structure with good performance is formed on the surface of the artificial joint, the water tightness of the internal water stopping structure (embedded or medium embedded) can be detected by adopting a water pressing test. If the water tightness effect of the internal water stop structure is poor, but the surface seal anti-seepage water stop structure is qualified, the surface seal anti-seepage water stop structure can be used without disassembly and reprocessing.
Example 4
The difference between this embodiment and embodiment 2 is that the embedded seal joint barrier water stop has epoxy cement 118 thereon, as shown in fig. 4. The water seepage condition of the surface seal seepage-proofing and water-stopping structure can be detected by adopting the method of the embodiment 3.
Example 5
Because the water inlet pipe and the exhaust pipe are not preset in the finished existing artificial joint, the water tightness test cannot be directly carried out on the artificial joint, concrete platforms with the same reinforcement and label are poured according to the reinforcement and label of the hydraulic building of the artificial joint to be evaluated for water tightness, and the size of the concrete platform is 1700mm long by 800mm wide by 450mm high; a groove with the length of 800mm, the width W1 and the depth of 50mm is formed in the concrete platform; w1 is the same as the width of the artificial seam and is used for evaluating the water tightness of the artificial seam.
The device for evaluating the water tightness of the sealing, seepage preventing and water stopping structure of the whole hydraulic building is shown in fig. 5, and comprises a test piece, a monitoring assembly and a water pressure control system;
the test assembly comprises a seal joint seepage prevention water stop structure 11, a water inlet pipe 12, an exhaust pipe 13, a water outlet pressure gauge 131 and an exhaust valve 132, wherein the water tightness to be tested is formed;
the monitoring assembly comprises a water delivery pipe 21, a water delivery pressure gauge 22, a flowmeter 23 and a water stop valve 24;
the water pressure control system comprises a four-way joint 31, a water pressing device 32, a water inlet pressure gauge 33, a connecting pipe 34 and a water storage tank 35;
because the manual seam to be detected is a groove formed on the concrete platform, the supporting materials are not required to be embedded at the two ends, and therefore, the sealing anti-seepage water stop structure 11 only needs to be formed by embedding the supporting materials 115 at the top and then covering the surface layer sealing material 112; the sealing and seepage-proofing water-stopping structure and the section of the artificial joint to be detected form a cavity 111, and no embedded water-stopping or embedded water-stopping exists.
The end of the inlet pipe 12 of the test assembly is bent at 90 °, the end of the inlet pipe 12 penetrating into the cavity 111; FIG. 6 is a cross-sectional view of the artificial joint;
the other end of the water inlet pipe 12 is connected with one end of a water delivery pipe 21 of the monitoring component; one end of the exhaust pipe 13 is extended into the cavity 111; the part of the exhaust pipe 13 outside the cavity is provided with a water outlet pressure gauge 131, and the tail end of the exhaust pipe 13 outside the cavity is provided with an exhaust valve;
the other end of the water pipe 21 is connected with a four-way joint 31 arranged at one side of the water pressing device; a water delivery pressure gauge 22, a flow meter 23 and a water stop valve 24 are sequentially arranged on the water delivery pipe 21 from the water inlet pipe 12 from near to far;
a pressure reducing pump 321 and a pressure increasing pump 322 are arranged in the water pressing equipment; the water pressing device is provided with a water inlet pressure gauge 33; the water pressure device and the water storage tank 35 are connected by a connecting pipe 34.
Example 5
The method for evaluating the water tightness of the manual seam sealing anti-seepage water stop structure of the concrete platform in the embodiment 4 comprises the following steps:
1) According to the reinforcement and the label of the manual-joint hydraulic building, pouring a concrete platform with the same reinforcement and label, wherein the size is 1700mm long, 800mm wide, and 450mm high; a groove with the length of 800mm, the width W1 and the depth of 50mm is formed in the concrete platform; w1 is the same as the manual seam width;
2) Cleaning the inner side of the artificial joint, polishing the outer side surface of the artificial joint, and repairing and leveling the defect part of the outer side surface of the artificial joint by using epoxy mortar, cement mortar or epoxy cement mortar;
3) Respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall at the inner side of the manual seam by using epoxy cement; then the surface of the inner side and the outer side of the artificial joint are coated with interfacial agent to form interfacial agent layers, then the top of the inner side of the artificial joint is embedded with top caulking sealing materials, then the surface layer sealing materials are covered, thus forming a sealed cavity,
4) Installing a monitoring component and a water pressure control system in the sealing joint seepage-proofing and water-stopping structure water tightness evaluation device of the hydraulic building and the test component in the step 4) to form a complete sealing joint seepage-proofing and water-stopping structure water tightness evaluation device;
5) Opening an exhaust valve of an exhaust pipe orifice, injecting water in a water storage tank into the closed cavity in the step 4) through a connecting pipe, a water pressing device, a water pipe and a water inlet pipe until the exhaust pipe is discharged, closing a valve of the exhaust pipe orifice, opening a valve of a pressure gauge on the exhaust pipe, enabling the pressure gauge to start to indicate pressure, and starting to inject water to pressurize step by step until the water pressure is designed;
6) Closing the water stop valve, maintaining pressure, and judging the water tightness: a) If the surface seam sealing seepage-proofing and water-stopping structure is visually inspected and has a seepage condition, judging that a seepage channel exists in the surface seam sealing seepage-proofing and water-stopping structure, and judging that the water tightness is unqualified; b) And when the whole pressurizing process and the designed operating water pressure are reached and the pressure maintaining is carried out for more than 30 minutes according to the designed operating water pressure, judging that a seepage-proof water-stopping structure with a surface sealing joint does not have a seepage channel, and judging that the water tightness is qualified.
As can be seen from the above embodiments, the closed cavity formed by the manual seam is embedded with the water inlet pipe and the air outlet pipe in advance, so that the invention has the advantages of no damage to the original structure and firmness. If the method of embedding in advance is not adopted, the problem of interface damage of the water inlet pipe and the sealing seam seepage prevention water stop structure embedded from behind can occur in the process of detecting the water tightness under pressure, so that the water tightness detection fails. Therefore, the device and the method for evaluating the water tightness of the sealing and seepage-proofing water stop structure of the hydraulic building can simulate the conditions during operation to evaluate the water tightness of the sealing and seepage-proofing water stop structure.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Claims (8)
1. The device for evaluating the water tightness of the sealing joint seepage prevention water stop structure of the hydraulic building is characterized by comprising a test piece, a monitoring assembly and a water pressure control system;
the test assembly comprises a seal joint seepage-proofing and water-stopping structure for water tightness to be tested, a manual joint section to be tested, a water inlet pipe, an exhaust pipe, a water outlet pressure gauge and an exhaust valve;
the monitoring component comprises a water delivery pipe, a water delivery pressure gauge, a flowmeter and a water stop valve;
the water pressure control system comprises a four-way joint, water pressing equipment, a pressure valve, a water inlet pressure gauge, a connecting pipe and a water storage tank;
the surface of the inner side of the artificial seam and the surface of the outer side of the artificial seam section are covered with an interfacial agent layer;
the sealing anti-seepage water stopping structure comprises a structure formed by a top caulking sealing material and a covered surface layer sealing material at the top of the to-be-detected manual seam section; the sealing anti-seepage water stop structure and the artificial joint section are enclosed to form a cavity;
the tail end of the water inlet pipe of the test assembly is bent at 60-150 degrees, and the tail end of the water inlet pipe penetrates into the cavity; the other end of the water inlet pipe is connected with one end of a water delivery pipe of the monitoring component; one end of the exhaust pipe extends into the cavity; the part of the exhaust pipe outside the cavity is provided with the water outlet pressure gauge, and the tail end of the exhaust pipe outside the cavity is provided with the exhaust valve;
the other end of the water delivery pipe is connected with a four-way joint arranged at one side of the water pressing equipment; the water delivery pipe is sequentially provided with a water delivery pressure gauge, a flowmeter and a water stop valve from the near to the far from the water inlet pipe;
a pressure reducing pump and a booster pump are arranged in the water pressing equipment; the water pressing equipment is provided with a water inlet pressure gauge; the water pressing device is connected with the water storage tank through a connecting pipe.
2. The water tightness evaluation device of a seal joint seepage prevention water stop structure of a hydraulic building according to claim 1, wherein the seal joint seepage prevention water stop structure to be tested for water tightness further comprises a buried seal joint seepage prevention water stop positioned in the middle of the artificial joint or a buried seal joint seepage prevention water stop positioned at the bottom of the artificial joint.
3. The device for evaluating the water tightness of a sealing, seepage-proofing and water stopping structure of a hydraulic building according to claim 1, wherein the test assembly is further used for embedding supporting materials at two ends of the to-be-detected artificial joint section when the two ends of the to-be-detected artificial joint section are open.
4. The device for evaluating the water tightness of a sealing joint seepage-proofing structure of a hydraulic building according to claim 1, wherein 2/3 of the measuring range of the pressure gauge is less than or equal to the design pressure.
5. The device for evaluating the water tightness of a sealing joint seepage-proofing and water stopping structure of a hydraulic building according to claim 1, wherein the interface agent layer is made of an epoxy interface agent; the surface layer sealing material is one or more of polyurea, polyurethane, organic silicon and fluorosilicone polymer; the top caulking sealing material is made of one or more of polyurea, polyurethane, organic silicon, fluorine-silicon polymer, elastic epoxy cement, elastic epoxy mortar, elastic polyurethane mortar and elastic polyurea mortar.
6. The water tightness evaluation method of the sealing joint seepage prevention water stop structure of the hydraulic building is characterized by comprising the following steps of:
1) Removing the original embedded polysulfide sealant interlayer or polyethylene foam interlayer from the outer surface of the artificial joint and the inner side of the artificial joint of the hydraulic building to the inner embedded joint seepage prevention water stop or the middle embedded joint seepage prevention water stop of the inner side of the artificial joint;
2) Cleaning the inner side of the artificial joint, polishing the outer side surface of the artificial joint, and repairing and leveling the defect part of the outer side surface of the artificial joint by using epoxy mortar, cement mortar or epoxy cement mortar;
3) Selecting a section of the artificial seam to be detected of the artificial seam, and embedding sponge or foam as a supporting material at two ends of the section of the artificial seam to be detected;
4) Respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall at the inner side of the manual seam by using epoxy cement; then coating interface agents on the inner side of the artificial joint and the outer side of the artificial joint to form an interface agent layer, filling a top caulking sealing material on the top of the inner side of the artificial joint, and then covering the surface sealing material to form a sealed cavity, so as to manufacture the test component in the joint sealing, seepage prevention and water stopping structure water tightness evaluation device of the hydraulic building according to any one of claims 1 to 5;
5) Installing the monitoring assembly and the water pressure control system in the sealing joint seepage prevention water stop structure water tightness evaluation device of the hydraulic building as described in claim 1 and the test assembly in the step 4) to form a complete sealing joint seepage prevention water stop structure water tightness evaluation device;
6) Opening an exhaust valve of an exhaust pipe orifice, injecting water in a water storage tank into the closed cavity in the step 4) through a connecting pipe, a water pressing device, a water pipe and a water inlet pipe until the exhaust pipe is discharged, closing the exhaust valve of the exhaust pipe orifice, opening a valve of a pressure gauge on the exhaust pipe, enabling the pressure gauge to start to indicate pressure, and starting to inject water to pressurize step by step until the water pressure is designed;
7) Closing the water stop valve, maintaining pressure, and judging the water tightness: a) When the pressure drops sharply and the surface sealing anti-seepage water stop structure is visually examined and has no water seepage condition, the fact that a seepage channel exists in the embedded sealing anti-seepage water stop structure or the embedded sealing anti-seepage water stop structure is indicated; b) If the surface seam sealing seepage-proofing and water-stopping structure is visually inspected and has a seepage condition, judging that a seepage channel exists in the surface seam sealing seepage-proofing and water-stopping structure, and judging that the water tightness is unqualified; c) And when the whole pressurizing process and the designed operating water pressure are reached and the pressure maintaining is carried out for more than 30 minutes according to the designed operating water pressure, judging that a seepage-proof water-stopping structure with a surface sealing joint does not have a seepage channel, and judging that the water tightness is qualified.
7. The method for evaluating the water tightness of a seal-joint prevention water stop structure of a hydraulic building according to claim 6, wherein the step 4) is replaced with the step 4 a): respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall of the manual seam by using epoxy cement; then, painting interface agents on the two sides and the top of the manual seam, and coating epoxy cement on the embedded type sealing seam seepage-proof water stop or the middle embedded type sealing seam seepage-proof water stop to seal the embedded type sealing seam seepage-proof water stop or the middle embedded type sealing seam seepage-proof water stop; and the surface is filled with caulking seal material, and then the surface layer is covered with the surface layer seal material, so that a closed cavity is formed, and the test assembly in the device for evaluating the water tightness of the caulking impermeable water stop structure of the hydraulic building according to claim 1 is manufactured.
8. The water tightness evaluation method of the sealing joint seepage prevention water stop structure of the hydraulic building is characterized by comprising the following steps of:
1) According to the reinforcement and the label of the manual-joint hydraulic building, pouring a concrete platform with the same reinforcement and label, wherein the size of the concrete platform is 1700mm long by 800mm wide by 450mm high; a groove with the length of 800mm, the width W1 and the depth of 50mm is formed in the concrete platform; w1 is the same as the manual seam width;
2) Cleaning the inner side of the artificial joint, polishing the outer side surface of the artificial joint, and repairing and leveling the defect part of the outer side surface of the artificial joint by using epoxy mortar, cement mortar or epoxy cement mortar;
3) Respectively fixing the water inlet pipe and the exhaust pipe at different positions of the side wall at the inner side of the manual seam by using epoxy cement; then coating interface agents on the inner side of the artificial joint and the outer side of the artificial joint to form an interface agent layer, filling a top caulking sealing material on the top of the inner side of the artificial joint, and then covering the surface sealing material to form a sealed cavity, so as to manufacture the test component in the joint sealing, seepage prevention and water stopping structure water tightness evaluation device of the hydraulic building according to any one of claims 1 to 5;
4) Installing the monitoring assembly and the water pressure control system in the sealing joint seepage prevention water stop structure water tightness evaluation device of the hydraulic building as described in claim 1 and the test assembly in the step 3) to form a complete sealing joint seepage prevention water stop structure water tightness evaluation device;
5) Opening an exhaust valve of an exhaust pipe orifice, injecting water in a water storage tank into the closed cavity in the step 4) through a connecting pipe, a water pressing device, a water pipe and a water inlet pipe until the exhaust pipe is discharged, closing a valve of the exhaust pipe orifice, opening a valve of a pressure gauge on the exhaust pipe, enabling the pressure gauge to start to indicate pressure, and starting to inject water to pressurize step by step until the water pressure is designed;
6) Closing the water stop valve, maintaining pressure, and judging the water tightness: a) If the surface seam sealing seepage-proofing and water-stopping structure is visually inspected and has a seepage condition, judging that a seepage channel exists in the surface seam sealing seepage-proofing and water-stopping structure, and judging that the water tightness is unqualified; b) And when the whole pressurizing process and the designed operating water pressure are reached and the pressure maintaining is carried out for more than 30 minutes according to the designed operating water pressure, judging that a seepage-proof water-stopping structure with a surface sealing joint does not have a seepage channel, and judging that the water tightness is qualified.
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|---|---|---|---|
| CN202311592956.0A CN117760650A (en) | 2023-11-27 | 2023-11-27 | Device and method for evaluating water tightness of sealing joint seepage prevention water stop structure of hydraulic building |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311592956.0A CN117760650A (en) | 2023-11-27 | 2023-11-27 | Device and method for evaluating water tightness of sealing joint seepage prevention water stop structure of hydraulic building |
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| CN117760650A true CN117760650A (en) | 2024-03-26 |
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| CN (1) | CN117760650A (en) |
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