CN105040633B - The installation method of water pressure sensor in the water coincidence dynamic model test of dam body storehouse - Google Patents
The installation method of water pressure sensor in the water coincidence dynamic model test of dam body storehouse Download PDFInfo
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- CN105040633B CN105040633B CN201510407608.0A CN201510407608A CN105040633B CN 105040633 B CN105040633 B CN 105040633B CN 201510407608 A CN201510407608 A CN 201510407608A CN 105040633 B CN105040633 B CN 105040633B
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Abstract
The present invention relates to the installation method of water pressure sensor in the water coincidence dynamic model test of dam body storehouse, category Hydraulic Structure Engineering and model investigation field.The present invention assembles reservoir dam simulating on coupling system after cast-in-place experiment dam body model initial set form removal；The analogue means of reservoir, i.e. water tank are lifted to dam body model upstream side；Water tank is cancelled by the side wall of dam body model side water tank side side wall dash is replaced with dam body model upstream face, water proof polybag in water tank is in close contact with dam body model upstream face；The water proof plastic sheeting of dam body model upstream upstream face is perforated, the pressure measurement diaphragm for making to be arranged in dam body model upstream face water pressure sensor fully contacts with the water body in water tank, to measure the hydraulic pressure force value of dam body model different parts under different tests operating mode.The present invention is simple in construction, construction technology is simple, easy to operation, the hydrodynamic pressure value that dam body upstream table is born when can measure earthquake exactly.
Description
Technical field
The present invention relates to the installation method of water pressure sensor in dam body-storehouse water coincidence dynamic model test, belong to water conservancy project
Structural Engineering and model investigation field.
Background technology
Upstream storehouse water and the mutual dynamic action of dam body have important to the dynamic response of dam body itself under geological process
Influence.When carrying out dam body-storehouse water coincidence earthquake motive force model test on a vibration table, general use is put in model dam body upstream side
Put the rectangular tank for filling with a water simulated reservoir water is to one of the dynamic action, its difficult point of dam body：The cast material of dam body and
How dam body model measures the flowing pressure of model dam body upstream face in itself with the contact surface of water tank it is difficult to ensure that water-tight
Value and urgent problem to be solved；
And when shake table carries out dam body-storehouse water coincidence earthquake motive force model test, it is necessary to be surveyed using water pressure sensor
Obtain the flowing pressure of upstream face.It is allowed to and upstream during experiment, it is necessary to which water pressure sensor is embedded in into model dam body upstream face
Storehouse water fully contacts the hydrodynamic pressure value of dam body upstream face when can just measure vibration.The problem of existing among these is to carry out dam
It is the similar scale requirement for meeting test model and prototype dam body during body-storehouse water coincidence earthquake motive force model test, it is general to use
Dam body cast material modulus of elasticity and intensity it is relatively low, and only water proofing property be present containing the cast material of a small amount of binder materials
Poor drawback, it is impossible to be independently used for stopping upstream Ku Shui as prototype dam body.In this case low-intensity model dam is ensured
Body can either dash, and can enough successfully installation water pressure sensor measure dam body upstream face hydrodynamic pressure value be difficult accomplish
's.
The content of the invention
The invention provides the installation method of water pressure sensor in dam body-storehouse water coincidence dynamic model test, this experiment
Method can solve the problem that the leak of cast material and dam body model and water tank contact surface during experiment and measured dam body upstream
The problem of face hydrodynamic pressure value.
The installation method of water pressure sensor is realized in dam body of the present invention-storehouse water coincidence dynamic model test：
The installation method comprises the following steps that：
Step1, after cast-in-place experiment dam body 1 pre-hardening form removal of model, assemble reservoir-dam body simulating on coupling system；
The analogue means of reservoir uses water tank 2, and water tank 2 is lifted to the upstream side of dam body model 1；Water tank 2 by the side of dam body model 1
Side wall is cancelled, and then carrys out dash instead of the side side wall of water tank 2 with the upstream side of dam body model 1, makes water proof polybag and dam in water tank 2
The upstream face of body Model 1 is in close contact, to ensure that water body can simulate the effect of prototype dam body upstream storehouse water, such as Fig. 1 in water tank 2
It is shown；
Step2, after the completion of step Step1 reservoir-dam body simulating on coupling system assembles, on dam body model 1
The water proof plastic sheeting 3 of trip upstream face is perforated, and makes the pressure measurement diaphragm for being arranged in the upstream face water pressure sensor 4 of dam body model 1
Fully contacted with the water body in water tank 2, to measure the pressure value of the different parts of dam body model 1 under different tests operating mode, such as Fig. 2 and
Shown in Fig. 3.
In the step Step1, dam body model 1 is that water tank 2 is simulated using software connected mode with upper pond so that ground
Shaking force can make reservoir-dam body simulating on coupling system be coupled together when testing, upstream Ku Shui and dam when simulating earthquake
The interaction of body, as shown in Figure 1.
In the step Step2, to make to be embedded in the transducer probe assembly of the water pressure sensor 4 of dam body model upstream face
6 can accurate data measured, then to be attached to dam body upstream face water proof plastic sheeting 3 perforate i.e. duck eye 5 and with screw 8 consolidate
It is fixed, add valve rubber 7 with preventing water leakage, as shown in Figures 2 and 3.
The present invention operation principle be：It is used as analogue means to simulate dam using the water tank 2 for internally placing foil-type plastic bag
Body upper pond, solve the problems, such as cast material and model dam body and the leak of water tank junction during experiment, with dam body model 1
Trip face substitutes one end side wall dash of water tank 2, effect of the simulation upstream storehouse water to dam body；When measuring flowing pressure, water proof plastics
Film 3 wears a duck eye 5 in corresponding measuring point position, transducer probe assembly 6 is passed by duck eye 5, valve rubber 7 on pad, is twisted with screw 8
Tightly, ensure that the measuring point edge of water pressure sensor 4 is water-tight, and can data measured.
The present invention can place model dam body upstream side in the rectangle steelframe wooden case that one length is 3.5 times of model heights of dam, water
A special foil-type plastic bag consistent with its inside dimension is placed in case, it is water-tight during ensureing to be full of water in water tank；By mould
After the water tank assembling of type dam body and simulation reservoir device finishes, the plastic sheeting of model dam body upstream upstream face is perforated, will
The measuring head of water pressure sensor is fixed through plastic sheeting and with waterproof rubber blanket and screw means, has both ensured that water pressure senses
Device is fixed in dam body upstream face corresponding site, its pressure measurement diaphragm is fully contacted with the water body in water tank again, to measure difference
The pressure value of operating condition of test drag dam body upstream face different parts.
The beneficial effects of the invention are as follows：Construction technology of the present invention is simple, without being used in model dam body and water tank junction
Special leakage-proof apparatus.Using the reservoir of the wooden case simulation dam body upstream of included foil-type plastic bag, solve cast material and model
The problem of dam body is with the leak of water tank junction, and measure the problem of the hydrodynamic pressure value of model dam body upstream face.
Brief description of the drawings
Fig. 1 is dynamic test dam body-reservoir coupling system model in the present invention；
Fig. 2 is water pressure sensor installation design sketch in the present invention；
Fig. 3 installs decomposition texture schematic diagram for water pressure sensor in the present invention；
Fig. 4 measures the distribution of model dam body upstream face maximum flowing pressure for test examples in the present invention.
Label in Fig. 1-4：1- dam body models, 2- water tanks, 3- water proof plastic sheetings, 4- water pressure sensors, 5- duck eyes, 6-
Transducer probe assembly, 7- valve rubbers, 8- screws.
Embodiment
Embodiment 1：As Figure 1-4, in dam body-storehouse water coincidence dynamic model test water pressure sensor installation side
Method, Step1, after cast-in-place experiment dam body 1 pre-hardening form removal of model, assemble reservoir-dam body simulating on coupling system；Reservoir
Analogue means uses water tank 2, and water tank 2 is lifted to the upstream side of dam body model 1；Side wall of the water tank 2 by the side of dam body model 1 is taken
Disappear, dash is then come instead of the side side wall of water tank 2 with the upstream side of dam body model 1, make water proof polybag and dam body model in water tank 2
1 upstream face is in close contact, to ensure that water body can simulate the effect of prototype dam body upstream storehouse water in water tank 2；
Step2, after the completion of step Step1 reservoir-dam body simulating on coupling system assembles, on dam body model 1
The water proof plastic sheeting 3 of trip upstream face is perforated, and makes the pressure measurement diaphragm for being arranged in the upstream face water pressure sensor 4 of dam body model 1
Fully contacted with the water body in water tank 2, to measure the pressure value of the different parts of dam body model 1 under different tests operating mode.
In the step Step1, dam body model 1 is that water tank 2 is simulated using software connected mode with upper pond so that ground
Shaking force can make reservoir-dam body simulating on coupling system be coupled together when testing, upstream Ku Shui and dam when simulating earthquake
The interaction of body.
In the step Step2, to make to be embedded in the transducer probe assembly of the water pressure sensor 4 of dam body model upstream face
6 can accurate data measured, then to be attached to dam body upstream face water proof plastic sheeting 3 perforate i.e. duck eye 5 and with screw 8 consolidate
It is fixed, add valve rubber 7 with preventing water leakage.
Embodiment 2：As Figure 1-4, in dam body-storehouse water coincidence dynamic model test water pressure sensor installation side
Method, Step1, after cast-in-place experiment dam body 1 pre-hardening form removal of model, assemble reservoir-dam body simulating on coupling system；Reservoir
Analogue means uses water tank 2, and water tank 2 is lifted to the upstream side of dam body model 1；Side wall of the water tank 2 by the side of dam body model 1 is taken
Disappear, dash is then come instead of the side side wall of water tank 2 with the upstream side of dam body model 1, make water proof polybag and dam body model in water tank 2
1 upstream face is in close contact, to ensure that water body can simulate the effect of prototype dam body upstream storehouse water in water tank 2；
Step2, after the completion of step Step1 reservoir-dam body simulating on coupling system assembles, on dam body model 1
The water proof plastic sheeting 3 of trip upstream face is perforated, and makes the pressure measurement diaphragm for being arranged in the upstream face water pressure sensor 4 of dam body model 1
Fully contacted with the water body in water tank 2, to measure the pressure value of the different parts of dam body model 1 under different tests operating mode.
In the step Step1, dam body model 1 is that water tank 2 is simulated using software connected mode with upper pond so that ground
Shaking force can make reservoir-dam body simulating on coupling system be coupled together when testing, upstream Ku Shui and dam when simulating earthquake
The interaction of body.
In the step Step2, to make to be embedded in the transducer probe assembly of the water pressure sensor 4 of dam body model upstream face
6 can accurate data measured, then to be attached to dam body upstream face water proof plastic sheeting 3 perforate i.e. duck eye 5 and with screw 8 consolidate
It is fixed, add valve rubber 7 with preventing water leakage.
Specifically, the skeleton that water tank 2 is done by angle steel and channel-section steel, tumbles in plank side wall, special foil-type plastic bag is attached in plank
Leak is prevented on wall, specific size is 7000mm（It is long）×800mm（It is wide）×2200mm（It is high）.
This example is the Compacted Concrete Gravity Dam Section that certain maximum height of dam is 203m, according to bearing capacity 10t, size is 3 ×
The characteristic of 3m three-way vibration platform, determine that the geometric similarity of this Case Experiments On A prototype and model than chi is 1：100；
This example measures flowing pressure distribution of the model dam body upstream face along height of dam, such as Fig. 4.As can be seen that seismic process
Middle elastic dam body upstream face flowing pressure maximum appears in about 1/3 height of dam position, this and existing earthquake resistance of hydraulic structure specification institute of China
The additional mass method result of calculation used is identical.
Above in conjunction with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (2)
1. the installation method of water pressure sensor in dam body-storehouse water coincidence dynamic model test, it is characterised in that：The installation side
Method comprises the following steps that：
Step1, when cast-in-place experiment dam body model（1）After pre-hardening form removal, reservoir-dam body simulating on coupling system is assembled；Will
The analogue means of reservoir uses water tank（2）, by water tank（2）Lift to dam body model（1）Upstream side；Water tank（2）By dam body mould
Type（1）The side wall of side is cancelled, then with dam body model（1）Upstream side replaces water tank（2）Side side wall carrys out dash, makes water tank
（2）Interior water proof polybag and dam body model（1）Upstream face is in close contact, to ensure water tank（2）Interior water body can simulate prototype
The effect of dam body upstream storehouse water；
Step2, after the completion of step Step1 reservoir-dam body simulating on coupling system assembles, to dam body model（1）Upstream
The water proof plastic sheeting of upstream face（3）Perforation, makes to be arranged in dam body model（1）Upstream face water pressure sensor（4）Pressure measurement
Diaphragm and water tank（2）In water body fully contact, to measure dam body model under different tests operating mode（1）The pressure of different parts
Value；
In the step Step2, to make to be embedded in the water pressure sensor of dam body model upstream face（4）Transducer probe assembly
（6）Can accurate data measured, then to being attached to the water proof plastic sheeting of dam body upstream face（3）Perforation is duck eye（5）And use spiral shell
Silk（8）It is fixed, add valve rubber（7）With preventing water leakage.
2. the installation method of water pressure sensor in dam body according to claim 1-storehouse water coincidence dynamic model test, its
It is characterised by：In the step Step1, dam body model（1）It is water tank with upper pond（2）Simulated using software connected mode,
Reservoir-dam body simulating on coupling system is set to be coupled together when earthquake motive force is tested, upstream storehouse when simulating earthquake
The interaction of water and dam body.
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