CN112461673A - Simulation test system and method for waterproof sealing material under hydraulic pressure working condition - Google Patents
Simulation test system and method for waterproof sealing material under hydraulic pressure working condition Download PDFInfo
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- CN112461673A CN112461673A CN202011341606.3A CN202011341606A CN112461673A CN 112461673 A CN112461673 A CN 112461673A CN 202011341606 A CN202011341606 A CN 202011341606A CN 112461673 A CN112461673 A CN 112461673A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
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- G01N2203/0048—Hydraulic means
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Abstract
The application provides a simulation test system and method for waterproof sealing materials under a hydraulic pressure working condition. The system comprises: the concrete test piece, fixing device to and water injection pressure device. Compared with the traditional method that one surface is selected from the self performance of the sealing material or the test is carried out on the engineering site, the system and the method have the advantages of practical and simple application, can reduce or avoid the repeated repair of the caulking waterproof part of the hydraulic engineering, improve the engineering quality, ensure the normal operation of the engineering and reduce the maintenance cost. Meanwhile, materials can be selected in advance according to specific hydraulic engineering, the working efficiency is improved, and waterproof sealing materials for caulking can be selected more reasonably and objectively and effectively verified.
Description
Technical Field
The invention belongs to a simulation test of water pressure resistant working conditions, and particularly relates to a water pressure resistant simulation test system and a water pressure resistant simulation test method for waterproof sealing materials used at positions such as caulking of hydraulic engineering under different water pressure working conditions.
Background
The waterproof sealing material is an important constituent unit of a waterproof sealing system of hydraulic engineering. The hydraulic building engineering structure mostly adopts a concrete structure, and a structure expansion joint (namely a caulking joint) is arranged between the concrete structures every several meters or dozens of meters according to different designs. The caulking is filled with a proper caulking waterproof elastic sealing material, so that the expansion allowance of concrete after expansion with heat and contraction with cold can be offset, and the water loss caused by the cracking and the renovation of a hydraulic engineering concrete building structure or the failure of caulking sealing can be reduced or avoided.
The concrete structure belongs to porous materials, in the long-term use process, the caulking waterproof elastic sealing materials are actually soaked in water for long-term pressure bearing, and the different types of caulking waterproof elastic sealing materials have different structural stability in the long-term underwater environment, so that the engineering needs to be frequently maintained. However, in the aspect of hydraulic engineering, the selection of the caulking waterproof elastic sealing material is only started from the material performance of the sealing material, a set of test method which is suitable for actual use and easy to realize is not provided, and objective and effective evaluation on the caulking waterproof elastic sealing material cannot be reasonably carried out.
For example, the GB/T50600 channel seepage-proofing engineering technical Specification and DL/T949 Hydraulic engineering building plastic caulking sealing material technical Standard both require only an elastoplastic water-stopping material with strong cohesive force, large deformation performance, good temperature resistance, aging resistance, no toxicity and no environmental pollution to a filling material of a hydraulic building expansion joint, do not have a test requirement aiming at specific working conditions, and cannot effectively and objectively select a caulking sealing material reasonably. The filling depth and width of the expansion joint are determined according to factors such as the gap distance, the air temperature variation, the filling performance, the construction requirement and the like specified by the national canal seepage-proofing engineering specifications.
The field needs to establish an effective testing system and method for simulation verification, and long-term continuous pressurization testing is carried out on the caulking waterproof elastic sealing material under the working condition.
Disclosure of Invention
The invention provides a set of simulation test system and method aiming at specific waterproof engineering working conditions, which can screen long-term water pressure resistance verification on the caulking waterproof elastic sealing material in advance and screen out the caulking waterproof elastic sealing material meeting the requirements.
In a first aspect, the present application provides a simulation test system for waterproof sealing material under hydraulic pressure, the system comprising:
the concrete test piece, the concrete test piece includes:
a first concrete member having a first end face and a second end face; the first concrete member is provided with a water injection hole which penetrates through the first concrete member in the direction from the first end face to the second end face;
a second concrete element having a third end face and a fourth end face; the second concrete member is provided with a drain hole which penetrates through the second concrete member from the third end surface to the fourth end surface;
wherein the first concrete member and the second concrete member are arranged opposite to each other in a vertical direction such that the second end surface of the first concrete member is opposite to the third end surface of the second concrete member; the waterproof sealing material to be tested may be disposed between the second end face of the first concrete member and the third end face of the second concrete member, forming a pressurized cavity between the second end face of the first concrete member and the third end face of the second concrete member;
one or more support and positioning blocks of equal height located within the pressurized cavity between the second end face of the first concrete element and the third end face of the second concrete element for supporting the first concrete element;
a fixing device for fixing the first concrete member and the second concrete member;
and the water injection pressurizing device is communicated with the water injection hole and the water discharge hole and is used for injecting water into a pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member and controlling the water pressure in the pressurizing cavity.
In one embodiment, the first concrete member and the second concrete member are the same in size and cylindrical, and the water injection hole and the water discharge hole are respectively located at the axial center positions of the first concrete member and the second concrete member.
In one embodiment, further comprising a depth positioning strip located between the second end face of the first concrete element and the third end face of the second concrete element;
wherein, the degree of depth locating bar apart from the interval of second concrete member periphery equals with the design caulking degree of depth, and the precision is 1 mm.
In one embodiment, the depth positioning strip is a closed cell foam rod or a closed cell foam strip.
In one embodiment, the height of the supporting and positioning block is equal to the width of the designed caulking joint, and the precision is +/-1 mm.
In one embodiment, the water injection pressurizing device comprises:
the circulating water tank is connected with the water injection hole through a pipeline and a water injection valve; the circulating water tank is connected with the drain hole through a pipeline and a drain valve;
the automatic control valve is arranged between the circulating water tank and the water injection hole;
and the pressure stabilizing and pressurizing control system is connected with the automatic control valve and is used for detecting and controlling the water pressure in a connecting pipeline of the circulating water tank and the water injection hole.
On the other hand, the application provides a simulation test method of waterproof sealing material under water pressure working condition, including the following step:
s1 provides a simulation test system, the simulation test system comprising:
the concrete test piece, the concrete test piece includes:
a first concrete member having a first end face and a second end face; the first concrete member is provided with a water injection hole which penetrates through the first concrete member in the direction from the first end face to the second end face;
a second concrete element having a third end face and a fourth end face; the second concrete member is provided with a drain hole which penetrates through the second concrete member from the third end surface to the fourth end surface;
wherein the first concrete member and the second concrete member are arranged up and down such that the second end face of the first concrete member is opposite to the third end face of the second concrete member; the waterproof sealing material to be tested may be disposed between the second end face of the first concrete member and the third end face of the second concrete member, forming a pressurized cavity between the second end face of the first concrete member and the third end face of the second concrete member;
one or more support and positioning blocks of equal height located within the pressurized cavity between the second end face of the first concrete element and the third end face of the second concrete element for supporting the first concrete element;
a fixing device for fixing the first concrete member and the second concrete member;
the water injection pressurizing device is communicated with the water injection hole and the water discharge hole and is used for injecting water into a pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member and controlling the water pressure in the pressurizing cavity;
s2 applying a waterproof sealing material to be tested between the second end face of the first concrete member and the third end face of the second concrete member;
s3, installing a fixing device, and fixing the first concrete member and the second concrete member through the fixing device;
s4, water is injected into the pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member through the water injection pressurizing device, the water pressure in the pressurizing cavity is controlled to be +/-5% of a set value, and the preset time is maintained.
In one embodiment, the simulation test system further comprises a depth positioning strip located between the second end face of the first concrete element and the third end face of the second concrete element; the distance between the depth positioning strip and the periphery of the second concrete member is equal to the designed caulking depth, and the precision is +/-1 mm;
wherein the depth of the waterproof sealing material to be tested is equal to the designed caulking depth.
In one embodiment, the height of the supporting and positioning block is equal to the designed caulking width, and the precision is +/-1 mm, so that the width of the waterproof sealing material to be tested is equal to the designed caulking width.
In one embodiment, a caulking displacement variation limit s is reserved in the fixture when the fixture is installedmaxThe position of (a);
wherein s ismaxCalculated by the following formula
smax＝L*△T*ac，
Wherein, the caulking distance of the concrete member under the L-working condition is m;
delta T-the annual internal temperature difference of the concrete member under the working condition, and the unit is;
acthe linear expansion coefficient of the concrete, in units of 1/DEG C.
Compared with the traditional method that one surface is selected from the self performance of the sealing material or the test is carried out on the engineering site, the system and the method have the advantages of practical and simple application, can reduce or avoid the repeated repair of the caulking waterproof part of the hydraulic engineering, improve the engineering quality, ensure the normal operation of the engineering and reduce the maintenance cost. Meanwhile, materials can be selected in advance according to specific hydraulic engineering, the working efficiency is improved, and waterproof sealing materials for caulking can be selected more reasonably and objectively and effectively verified.
Drawings
FIG. 1 is a schematic diagram illustrating a concrete test piece in the simulation test system of the present application;
FIG. 2 is a schematic view showing the construction of a concrete test piece before applying a waterproof sealing material;
FIG. 3 is a schematic view showing the structure of a concrete test piece after a waterproof sealing material is applied thereto;
FIG. 4 is a schematic view showing a concrete test piece after the reinforcing means has been applied thereto;
FIG. 5 shows a schematic diagram of the simulation test system of the present application.
Detailed Description
The technical solution of the present invention is further explained below according to specific embodiments. The scope of protection of the invention is not limited to the following examples, which are set forth for illustrative purposes only and are not intended to limit the invention in any way.
The application provides waterproof sealing material's simulation test system under water pressure operating mode. The simulation test system can be used for simulating the water pressure resistance test of the waterproof sealing material for the positions such as water conservancy project caulking and the like and evaluating the effectiveness of the waterproof sealing material. These hydraulic works may be works constructed for controlling and allocating surface water and underground water in nature to achieve the purpose of removing harmful substances and benefiting benefits, and include channels, aqueducts, dams, dikes, spillways, hydropower stations flood discharging tunnels and the like. The caulking waterproof elastic sealing material comprises all caulking waterproof elastic sealing materials which can be used in the water conservancy field, is a room temperature curing type elastic sealing material with the adhesive property with concrete, and comprises polysulphides, organosilicones, polyurethanes, modified polysulphides, modified polyethers, modified polyurethanes and the like.
As shown in fig. 1-5, the system includes:
concrete test 1, concrete test 1 includes:
a first concrete element 11 having a first end face 111 and a second end face 112; a drain hole 113 penetrating the first concrete member 11 in a direction from the first end face to the second end face is formed in the first concrete member 11;
a second concrete element 12 having a third end face 121 and a fourth end face 122; the second concrete member 12 is provided with a water injection hole 123 penetrating through the second concrete member 12 in a direction from the third end surface to the fourth end surface;
wherein the first concrete element 11 and the second concrete element 12 are arranged opposite to each other in the up-down direction such that the second end surface 112 of the first concrete element 11 is opposite to the third end surface 121 of the second concrete element 12; the waterproof sealing material 14 to be tested may be disposed between the second end face 112 of the first concrete member and the third end face 121 of the second concrete member, forming a pressurized cavity 13 between the second end face 112 of the first concrete member and the third end face 121 of the second concrete member;
one or more support and positioning blocks 15 of equal height, located in the pressurized cavity 13 between the second end face of the first concrete element and the third end face of the second concrete element, for supporting the first concrete element 11;
a fixing device 2 for fixing the first concrete member 11 and the second concrete member 12;
and a water injection pressurizing device which is communicated with the water discharge hole 113 and the water injection hole 123, and is used for injecting water into the pressurizing cavity 13 between the second end surface of the first concrete member and the third end surface of the second concrete member and controlling the water pressure in the pressurizing cavity 13.
Portions of the simulation test system are described in detail below.
As shown in fig. 1-3, the system comprises a concrete test piece 1, which is made up of two concrete elements, a first concrete element 11 and a second concrete element 12. The first concrete element 11 and the second concrete element 12 are arranged opposite to each other in the vertical direction such that the second end surface 112 of the first concrete element 11 is opposite to the third end surface 121 of the second concrete element 12. The size and shape of the components can be specified according to actual needs. For the convenience of testing, the first concrete member 11 and the second concrete member 12 have the same size and are cylindrical, and the water discharge hole 113 and the water injection hole 123 are respectively located at the axial center positions of the first concrete member 11 and the second concrete member 12. And the diameter precision of the first concrete member and the second concrete member is +/-5 mm, and the caulking depth size precision is +/-1 mm, so that the caulking positions of the first concrete member and the second concrete member after installation are smooth, and the accuracy of test data is ensured.
The waterproof sealing material 14 to be tested may be disposed on the third end face 121 of the second concrete member so as to be located between the second end face 112 of the first concrete member and the third end face 121 of the second concrete member when the first concrete member 11 and the second concrete member 12 are combined.
In order to ensure the width of the waterproof sealing material 14 to be tested, the concrete test piece 1 further includes one or more support and positioning blocks 15 having an equal height, which are located in the pressurizing cavity 13 between the second end face of the first concrete member and the third end face of the second concrete member, for supporting the first concrete member 11. In order to enable the waterproof sealing material 14 to be tested to better meet the actual use condition in the hydraulic engineering, the width of the waterproof sealing material 14 to be tested can be equal to the designed caulking width in the actual use condition, so that the height of the supporting and positioning block is equal to the designed caulking width, and the precision is +/-1 mm. In the present application, for example, a caulking width is designed to be 4cm, a height of the support positioning block may be designed to be (4.0 ± 0.1) cm. The designed caulking width refers to a caulking width which is designed in advance according to standards or actual needs in caulking between two concrete structures in actual hydraulic engineering. The design caulking width may be determined as desired or design criteria. In one embodiment, the support positioning block 15 is a metal block, which may be at least 3 blocks, for example, 3-5 blocks, and is uniformly placed on the third end surface 121 of the second concrete member 12 based on the center point of the second concrete member 12.
The depth of the waterproof sealing material 14 to be tested can be marked by scoring from the outside to the inside at the edge of the second concrete member 12 in order to apply the waterproof sealing material 14 to be tested to the corresponding position. In order to ensure the depth of the waterproof sealing material 14 to be tested, a depth positioning strip 16 is further included, the depth positioning strip 16 being located between the second end face of the first concrete member and the third end face of the second concrete member; wherein, the distance between the depth positioning strip 16 and the periphery of the second concrete member is equal to the designed caulking depth, and the precision is +/-1 mm. Thus, when applying the waterproof sealing material 14 to be tested, the waterproof sealing material 14 to be tested can be applied flush along the outer edges of the first and second concrete members 11, 12 and up to the depth positioning strip 16. As described above, the designed caulking depth means a caulking depth which is previously designed according to standards or actual needs in a caulking joint between two concrete structures in actual hydraulic engineering. The design caulking depth may be determined as desired or design criteria. In one embodiment, the depth positioning strips 16 may be closed cell foam rods or closed cell foam strips. The depth of the locating bar 16 may be selected as appropriate for the design caulking width. For example, if a 4cm caulking width is contemplated, a foam rod having a diameter slightly larger than 4cm (e.g., 4.5cm diameter) is selected to ensure the size of the caulking seam.
The system comprises a fixing device 2 for fixing the first concrete element 11 and the second concrete element 12, and the first concrete element 11 and the second concrete element 12 are prevented from being separated due to the action of water pressure during the test. As shown in fig. 4, the fixing device 2 may include two upper and lower fixing brackets 21, 22, a center of the upper fixing bracket 21 is fitted over the water discharge hole 113, a center of the lower fixing bracket 22 is fitted over the water injection hole 123, and the two fixing brackets are connected together by three screws 23 penetrating through the fixing brackets 21, 22 through nuts 24, thereby fixing the first concrete member 11 and the second concrete member 12 together.
In order to simulate the displacement change limit S of the caulking joint under the actual use working condition (annual temperature difference Delta T of the expansion joint and the joint spacing L)max(i.e., the linear expansion amount of each expansion joint), and when the fixing device is installed, a caulking displacement change limit S is reserved in the fixing devicemaxThe position of (a);
wherein S ismaxCalculated by the following formula
Smax＝L*△T*ac，
Wherein, the caulking distance of the concrete member under the L-working condition is m;
delta T-the annual internal temperature difference of the concrete member under the working condition, and the unit is;
acthe linear expansion coefficient of the concrete, in units of 1/DEG C.
GB 50010 "concrete structure design Specification" article 4.1.8 informs: when the temperature is within (0-100) DEG C, the linear expansion coefficient is 0.00001/DEG C.
The fixing device for mounting the test specimen (as shown in fig. 4) can adjust the position of the nut 24 of the fixing device to make the maximum variable displacement S of the concrete specimen in the process of bearing water pressuremaxTherefore, the test process is closer to the actual working condition.
The system further comprises a water injection pressurizing means, which is communicated with the water discharge hole 113 and the water injection hole 123, for injecting water into the pressurizing cavity 13 between the second end surface of the first concrete member and the third end surface of the second concrete member, and controlling the water pressure in the pressurizing cavity 13.
In one embodiment, as shown in fig. 5, the water injection pressurizing device includes:
a circulation water tank 31 connected to the water filling hole 123 through a pipe 311 and a water filling valve 312; the circulating water tank is connected with the drain hole 113 through a pipeline 313 and a drain valve 314;
an automatic control valve 32, the automatic control valve 32 being disposed between the circulation water tank 31 and the water filling hole 123;
and the pressure stabilizing and pressurizing control system 33 is connected with the automatic control valve 32, and is used for detecting and controlling the water pressure in a connecting pipeline of the circulating water tank and the water injection hole.
These valves (fill valve 312, drain valve 314, and automatic control valve 32) and the regulated boost control system 33, etc. may use equipment and systems conventional in the art and will not be described in detail herein. The water pressure in the test system, which can be determined according to the actual use conditions, can be set and controlled by the regulated boost control system 33. The pressure stabilizing and pressurizing control system can set different pressurizing parameters, track the pressure in real time and stably control the pressurizing value.
For example, the maximum water pressure p (mpa) to be applied can be calculated according to the depth h (m) of the hydraulic engineering under water:
for the system shown in fig. 5, the test procedure can be performed as follows:
opening the drain valve 314, connecting the water injection valve 321, and closing the drain valve 314 after the gas in the cavity is completely discharged until the cavity is filled with water;
setting a test water pressure through a pressure stabilizing and boosting control system, wherein the test water pressure is the maximum water pressure P, MPa born by calculation according to the working condition;
and (4) a pressure stabilizing test process, namely maintaining the water pressure P for a period of time (for example, 10d or other test period deemed appropriate), and tracking the test in real time by the pressure stabilizing and boosting control system.
After the test is over, whether the pressure value according to the last demonstration concrete test piece of control system keeps the setting value steadily, and the caulking position structure is normal, whether this caulking sealing material is effective at this operating mode waterproof sealing is verified in the aassessment: if the pressure of the test specimen is lower than the set value and is detected to be caused by the caulking material, the caulking sealing material is verified to be ineffective in waterproof sealing under the working condition; if the pressure of the test specimen is stably kept and the structure of the caulking part of the concrete test specimen is checked to be normal, the caulking sealing material is verified to be effective in waterproof sealing under the working condition.
Therefore, the application also provides a simulation test method of the waterproof sealing material under the water pressure working condition, which comprises the following steps:
s1 provides the simulation test system of the present application,
s2 applying a waterproof sealing material to be tested between the second end face of the first concrete member and the third end face of the second concrete member;
s3, installing a fixing device, and fixing the first concrete member and the second concrete member through the fixing device;
s4, injecting water into the pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member by the water injection pressurizing device, controlling the water pressure in the pressurizing cavity to a set value, and maintaining the water pressure for a predetermined time.
The above description of the simulation test system of the present application is also applicable to the simulation test method of the present application, and is not repeated here.
In the testing process, in order to ensure the surface cleanliness of the concrete member, a floating layer on the bonding surface of the concrete member can be removed by adopting a mechanical mode such as an angle grinder, and the like, and the floating ash on the bonding surface of the concrete member can be blown off by adopting a high-pressure air gun.
Marking the gluing depth on the edge of the second concrete member by scribing from outside to inside according to the designed caulking depth of the engineering design; according to the designed caulking width, a plurality of, for example, 3, supporting positioning blocks with the same height as the caulking width are uniformly placed on the basis of the center point of the concrete lower component to control the caulking gluing width.
Aligning and combining the first and second concrete members;
filling the depth positioning strip in a gap scribing position formed by the two members to ensure the size of the gluing seam;
cleaning the glued part by using a cleaning agent;
adopting a construction process provided by a sealing material manufacturer to densely fill the caulking waterproof elastic sealing material in the formed caulking position;
and finishing the appearance of the joint of the pressure-resistant test piece.
Thereafter, a test may be performed: connecting the water pressure resistant test piece with a water injection pressurizing device through a pipeline; the pressure measuring pressure and the pressure control range are set through the control system. The pressure of a test specimen is stable in a set range, and the tightness of the test specimen is intact, so that the caulking sealant is effective in waterproof sealing evaluation under the working condition of testing water pressure; and if the pressure of a single test piece is lower than the set range, the test piece is sealed and fails to be waterproof, and the caulking sealant is evaluated not to be used under the test water pressure working condition.
Compared with the traditional method that one surface is selected from the self performance of the sealing material or the test is carried out on the engineering site, the system and the method have the advantages of practical and simple application, can reduce or avoid the repeated repair of the caulking waterproof part of the hydraulic engineering, improve the engineering quality, ensure the normal operation of the engineering and reduce the maintenance cost. Meanwhile, materials can be selected in advance according to specific hydraulic engineering, the working efficiency is improved, and waterproof sealing materials for caulking can be selected more reasonably and objectively and effectively verified.
The accuracy of the test results of the method of the invention is discussed below by way of example:
waterproof sealing materials from 2 commonly used manufacturers were purchased from the market: the balanced water-compatible bridge two-component polysulfide sealant is marked as a waterproof sealing material 1#The building sealant with balanced water and giant Yu polysulfide is marked as waterproof sealing material 2#. By adopting the inventionThe implementation method flow verifies the long-term water pressure resistance of each material under the following working conditions (namely, the number of meters of underwater parts under the working conditions): the annual temperature difference is 35 ℃, the caulking distance of the concrete member is 10m, the diameter of the engineering pipeline is 2m, the caulking width is 2cm, and the caulking depth is 3.5 cm.
Verification is carried out according to the implementation method flow and the requirements of the invention: preparing a first concrete member and a second concrete member with the diameters of 2m +/-5 mm; placing a supporting positioning block with the height of 2cm +/-1 mm; placing a depth positioning strip to enable the caulking depth to meet 3.5cm +/-1 mm; embedding and filling a waterproof sealing material; curing according to the curing requirement of the waterproof sealing material; calculating caulking displacement change limit S from working conditionsmaxIs 3.5 mm; the fixing device is installed, and the position of the nut 24 of the fixing device is adjusted, so that the maximum variable displacement of the concrete sample is 3.5mm in the process of bearing water pressure, and the testing process is closer to the actual working condition. The test pressurization flow is set to be 0.05(1 +/-5%) MPa 10d → 0.10(1 +/-5%) MPa 10d → 0.15(1 +/-5%) MPa 10d → 0.20(1 +/-5%) MPa 10d, … … and so on, and the test is carried out according to the above implementation method of the invention by taking 0.05MPa as a node, and the details are not repeated herein.
The real-time tracking test result is as follows:
waterproof sealing material 1#When the water pressure of the concrete sample is just increased to 0.10MPa, the waterproof sealing material 1#The colloid is broken, and simultaneously, the control system displays that the pressure of the test piece is reduced to 0.02MPa, which proves that the waterproof sealing material 1 is under the working condition#: the waterproof sealing device is suitable for long-term waterproof sealing at the water pressure of 5m (namely 0.05 MPa); is not suitable for waterproof sealing at the water pressure of more than or equal to 10m (namely more than or equal to 0.10 MPa).
Water-proof sealing material 2#When the concrete sample is pressurized to 0.13MPa, the waterproof sealing material 2 appears on the second end surface 112 of the concrete first member 11#The phenomenon of debonding and pressure relief is caused, meanwhile, the control system displays that the pressure of the test piece is reduced to 0.06MPa, and the waterproof sealing material 2 is proved to be under the working condition#: the waterproof sealing device is suitable for long-term waterproof sealing at a water pressure of 10m (0.10 MPa); is not suitable for waterproof sealing at the water pressure of more than or equal to 15m (namely more than or equal to 0.10 MPa).
According to the test method, the test results of the water pressure working conditions of the different waterproof sealing materials show that the water pressure resistant working conditions suitable for each waterproof sealing material are different. At the same time, the waterproof sealing material 1 was checked based on the tracing#、2#The use condition in the same hydraulic engineering with 10m water pressure is as follows: waterproof sealing Material 1#Checking after the engineering operation is carried out for half a year, large-area colloid cracks and debonds occur, and the sealing is invalid; waterproof sealing Material 2#The caulking sealing waterproof structure is intact when the engineering operation is checked after half a year; in addition, the waterproof sealing material 1 was checked by tracing#、2#Use in another hydraulic project at 20m water pressure: waterproof sealing Material 1#、2#And the phenomena of large-area colloid breakage, debonding and sealing failure are generated after the engineering operation is carried out for half a year. The test results of the two waterproof sealing materials are consistent with the use conditions of the test system and the simulation test method in different working conditions of actual engineering, and the test system and the test method are verified to be accurate and effective. The method and the system can select materials in advance aiming at concrete hydraulic engineering, improve the working efficiency, and can more reasonably select the waterproof sealing material for caulking to carry out objective and effective verification on the waterproof sealing material.
It should be noted by those skilled in the art that the described embodiments of the present invention are merely exemplary and that various other substitutions, alterations, and modifications may be made within the scope of the present invention. Accordingly, the present invention is not limited to the above-described embodiments, but is only limited by the claims.
Claims (10)
1. A simulation test system of waterproof sealing material under hydraulic pressure operating mode is characterized in that the system comprises:
the concrete test piece, the concrete test piece includes:
a first concrete member having a first end face and a second end face; the first concrete member is provided with a water injection hole which penetrates through the first concrete member in the direction from the first end face to the second end face;
a second concrete element having a third end face and a fourth end face; the second concrete member is provided with a drain hole which penetrates through the second concrete member from the third end surface to the fourth end surface;
wherein the first concrete member and the second concrete member are arranged opposite to each other in a vertical direction such that the second end surface of the first concrete member is opposite to the third end surface of the second concrete member; the waterproof sealing material to be tested may be disposed between the second end face of the first concrete member and the third end face of the second concrete member, forming a pressurized cavity between the second end face of the first concrete member and the third end face of the second concrete member;
one or more support and positioning blocks of equal height located within the pressurized cavity between the second end face of the first concrete element and the third end face of the second concrete element for supporting the first concrete element;
a fixing device for fixing the first concrete member and the second concrete member;
and the water injection pressurizing device is communicated with the water injection hole and the water discharge hole and is used for injecting water into a pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member and controlling the water pressure in the pressurizing cavity.
2. The simulation test system of claim 1, wherein the first concrete member and the second concrete member are of the same size and are cylindrical, and the water injection hole and the water discharge hole are respectively located at axial center positions of the first concrete member and the second concrete member.
3. The simulation test system of claim 1, further comprising a depth locator bar positioned between the second end face of the first concrete member and the third end face of the second concrete member;
wherein, the degree of depth locating bar apart from the interval of second concrete member periphery equals with the design caulking degree of depth, and the precision is 1 mm.
4. The simulation testing system of claim 3, wherein the depth positioning strip is a closed cell foam rod or a closed cell foam strip.
5. The simulation test system of claim 1, wherein the height of the support and positioning block is equal to the design caulking width with a precision of ± 1 mm.
6. The simulation test system of claim 1, wherein the water injection pressurization device comprises:
the circulating water tank is connected with the water injection hole through a pipeline and a water injection valve; the circulating water tank is connected with the drain hole through a pipeline and a drain valve;
the automatic control valve is arranged between the circulating water tank and the water injection hole;
and the pressure stabilizing and pressurizing control system is connected with the automatic control valve and is used for detecting and controlling the water pressure in a connecting pipeline of the circulating water tank and the water injection hole.
7. The simulation test method of the waterproof sealing material under the hydraulic pressure working condition comprises the following steps:
s1 provides a simulation test system, the simulation test system comprising:
the concrete test piece, the concrete test piece includes:
a first concrete member having a first end face and a second end face; the first concrete member is provided with a water injection hole which penetrates through the first concrete member in the direction from the first end face to the second end face;
a second concrete element having a third end face and a fourth end face; the second concrete member is provided with a drain hole which penetrates through the second concrete member from the third end surface to the fourth end surface;
wherein the first concrete member and the second concrete member are arranged up and down such that the second end face of the first concrete member is opposite to the third end face of the second concrete member; the waterproof sealing material to be tested may be disposed between the second end face of the first concrete member and the third end face of the second concrete member, forming a pressurized cavity between the second end face of the first concrete member and the third end face of the second concrete member;
one or more support and positioning blocks of equal height located within the pressurized cavity between the second end face of the first concrete element and the third end face of the second concrete element for supporting the first concrete element;
a fixing device for fixing the first concrete member and the second concrete member;
the water injection pressurizing device is communicated with the water injection hole and the water discharge hole and is used for injecting water into a pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member and controlling the water pressure in the pressurizing cavity;
s2 applying a waterproof sealing material to be tested between the second end face of the first concrete member and the third end face of the second concrete member;
s3, installing a fixing device, and fixing the first concrete member and the second concrete member through the fixing device;
s4, water is injected into the pressurizing cavity between the second end surface of the first concrete member and the third end surface of the second concrete member through the water injection pressurizing device, the water pressure in the pressurizing cavity is controlled to be +/-5% of a set value, and the preset time is maintained.
8. The simulation test method of claim 7, wherein the simulation test system further comprises a depth locator bar positioned between the second end face of the first concrete member and the third end face of the second concrete member; the distance between the depth positioning strip and the periphery of the second concrete member is equal to the designed caulking depth, and the precision is +/-1 mm;
wherein the depth of the waterproof sealing material to be tested is equal to the designed caulking depth.
9. The simulation test method of claim 7, wherein the height of the support and positioning block is equal to the design caulking width with an accuracy of ± 1mm so that the width of the waterproof sealing material to be tested is equal to the design caulking width.
10. The simulation test method of claim 7, wherein a caulking displacement variation limit s is reserved in the fixture when the fixture is installedmaxThe position of (a);
wherein s ismaxCalculated by the following formula
smax＝L*△T*ac，
Wherein, the caulking distance of the concrete member under the L-working condition is m;
delta T-the annual internal temperature difference of the concrete member under the working condition, and the unit is;
acthe linear expansion coefficient of the concrete, in units of 1/DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218584A (en) * | 2021-04-30 | 2021-08-06 | 深圳市卓宝科技股份有限公司 | Method for testing water-closing performance of roof waterproof heat-insulation system |
| CN113720549A (en) * | 2021-09-15 | 2021-11-30 | 烟台金润核电材料股份有限公司 | Detection method of sealing material |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181270A (en) * | 2015-09-18 | 2015-12-23 | 中国矿业大学(北京) | Waterproof testing method for vertical seam using terpolymer EP rubber sealing rod |
| CN105181554A (en) * | 2015-09-18 | 2015-12-23 | 中国矿业大学(北京) | Waterproof test method for horizontal joint applying grouting layer |
| CN205038028U (en) * | 2015-09-23 | 2016-02-17 | 同济大学 | Seam waterproof performance test device that shield tunnel multichannel line of defence stagnant water is sealed |
| CN106092759A (en) * | 2016-08-04 | 2016-11-09 | 江苏恒神股份有限公司 | A kind of hydrostatic test special tooling and hydrostatic test method |
| CN108362444A (en) * | 2018-04-27 | 2018-08-03 | 西南石油大学 | A kind of shield tunnel gasket water resistance test device and application method |
| CN109738132A (en) * | 2019-02-19 | 2019-05-10 | 中国水利水电科学研究院 | Hydraulic structure expansion joint water-stagnating effect rapid detection system and method |
| CN110763609A (en) * | 2019-11-26 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Testing device and method for testing seam type caulking waterproof performance |
| CN111174982A (en) * | 2020-01-20 | 2020-05-19 | 安徽建筑大学 | Deformation joint waterproof structure waterproof performance test system and test method |
| CN111896451A (en) * | 2020-05-08 | 2020-11-06 | 同济大学 | Method for testing waterproof performance of shield tunnel joint in different deformation states |
-
2020
- 2020-11-25 CN CN202011341606.3A patent/CN112461673A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181270A (en) * | 2015-09-18 | 2015-12-23 | 中国矿业大学(北京) | Waterproof testing method for vertical seam using terpolymer EP rubber sealing rod |
| CN105181554A (en) * | 2015-09-18 | 2015-12-23 | 中国矿业大学(北京) | Waterproof test method for horizontal joint applying grouting layer |
| CN205038028U (en) * | 2015-09-23 | 2016-02-17 | 同济大学 | Seam waterproof performance test device that shield tunnel multichannel line of defence stagnant water is sealed |
| CN106092759A (en) * | 2016-08-04 | 2016-11-09 | 江苏恒神股份有限公司 | A kind of hydrostatic test special tooling and hydrostatic test method |
| CN108362444A (en) * | 2018-04-27 | 2018-08-03 | 西南石油大学 | A kind of shield tunnel gasket water resistance test device and application method |
| CN109738132A (en) * | 2019-02-19 | 2019-05-10 | 中国水利水电科学研究院 | Hydraulic structure expansion joint water-stagnating effect rapid detection system and method |
| CN110763609A (en) * | 2019-11-26 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Testing device and method for testing seam type caulking waterproof performance |
| CN111174982A (en) * | 2020-01-20 | 2020-05-19 | 安徽建筑大学 | Deformation joint waterproof structure waterproof performance test system and test method |
| CN111896451A (en) * | 2020-05-08 | 2020-11-06 | 同济大学 | Method for testing waterproof performance of shield tunnel joint in different deformation states |
Non-Patent Citations (3)
| Title |
|---|
| 卢春房: "《轨道工程》", 30 April 2015, 中国铁道出版社 * |
| 沈春林 等: "《防水技术手册》", 31 October 1993, 中国建材工业出版社 * |
| 董林伟 等: "装置材料对防水试验中密封垫性能的影响", 《隧道建设》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218584A (en) * | 2021-04-30 | 2021-08-06 | 深圳市卓宝科技股份有限公司 | Method for testing water-closing performance of roof waterproof heat-insulation system |
| CN113720549A (en) * | 2021-09-15 | 2021-11-30 | 烟台金润核电材料股份有限公司 | Detection method of sealing material |
| CN113720549B (en) * | 2021-09-15 | 2024-01-26 | 烟台金润核电材料股份有限公司 | Detection method of sealing material |
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