CN105040633A - Installing method for water pressure sensor in dam body-reservoir water coupling dynamic model test - Google Patents
Installing method for water pressure sensor in dam body-reservoir water coupling dynamic model test Download PDFInfo
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Abstract
The invention relates to an installing method for a water pressure sensor in a dam body-reservoir water coupling dynamic model test, and belongs to the field of hydraulic structure engineering and model test researches. The installing method includes the steps that after initial setting and formwork removal of a cast-in-situ test dam body model are finished, a reservoir-dam body coupling simulation system is assembled; a reservoir simulating device, namely a water tank is hoisted to the upstream side of the dam body model; the side wall, close to one side of the dam body model, of the water tank is omitted, and the upstream face of the dam body model replaces the side wall at one side of the water tank to stop water so that a waterproof plastic bag in the water tank can make tight contact with the upstream face of the dam body model; holes in a waterproof plastic film on the upstream water attaining face of the dam body model are punched, so that a pressure measuring membrane of the water pressure sensor placed on the upstream surface of the dam body model makes full contact with water in the water tank to measure water pressure values of different portions of the dam body model under different test working conditions. The water pressure sensor is simple in structure and construction technology, easy to operate, and capable of accurately measuring values of the dynamic water pressure borne by the upstream surface of a dam body in an earthquake.
Description
Technical field
The present invention relates to the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test, belong to Hydraulic Structure Engineering and model investigation field.
Background technology
Under geological process, storehouse, upstream water and the mutual dynamic response of dynamic action on dam body self of dam body have important impact.When carrying out dam body-Ku water coincidence earthquake motive force model testing on a vibration table, general employing places the rectangular tank simulated reservoir water of a filled with water to the dynamic action of dam body at model dam body upstream side, one of its difficult point is: the cast material of dam body and dam body model itself and the contact surface of water tank are difficult to ensure water-tight, and the hydrodynamic pressure value how recording model dam body upstream face is also problem demanding prompt solution;
And when vibroplatform carries out dam body-Ku water coincidence earthquake motive force model testing, need to adopt water pressure sensor to record the flowing pressure of upstream face.During test, need water pressure sensor to be embedded in the hydrodynamic pressure value that model dam body upstream face makes it fully to contact with storehouse, upstream water dam body upstream face when just can record vibration.This wherein Problems existing be, be the similar scale requirement meeting test model and prototype dam body when carrying out dam body-Ku water coincidence earthquake motive force model testing, modulus of elasticity and the intensity of the dam body cast material of general employing are all lower, and there is the poor drawback of water proofing property in the cast material only containing a small amount of cementitious material, can not independently for stopping upstream Ku Shui as prototype dam body.In this case to ensure that low-intensity model dam body can either dash, water pressure sensor successfully can be installed again and record dam body upstream face hydrodynamic pressure value and be difficult to accomplish.
Summary of the invention
The invention provides the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test, the method for this test can solve leaking of cast material and dam body model and water tank contact surface in process of the test and record the problem of dam body upstream face hydrodynamic pressure value.
In dam body-Ku water coincidence dynamic model test of the present invention, the mounting method of water pressure sensor is achieved in that the concrete steps of described mounting method are as follows:
Step1, after cast-in-place test dam body model 1 initial set form removal, assembling reservoir-dam body simulating on coupling system; By the analogue means of reservoir, adopt water tank 2, lift to dam body model 1 upstream side; Then lean on the sidewall of dam body model 1 side to cancel in water tank 2 replaces water tank 2 side sidewall to carry out dash with dam body model 1 upstream side, make water proof polybag and dam body model 1 upstream face close contact in water tank 2, to ensure that in water tank 2, water body can simulate the effect of storehouse, prototype dam body upstream water, as shown in Figure 1;
Step2, after the reservoir-dam body simulating on coupling system assembles of step Step1 completes, the water proof plastic sheeting 3 of dam body model 1 upstream upstream face is bored a hole, the pressure measurement diaphragm being arranged in dam body model 1 upstream face water pressure sensor 4 is fully contacted with the water body in water tank 2, to record the force value of dam body model 1 different parts under different tests operating mode, as shown in Figures 2 and 3.
In described step Step1, dam body model 1 adopts software connected mode to simulate with upper pond and water tank 2, and dam body-Ku water system can be made when earthquake motive force is tested to be coupled together, and when simulating earthquake, storehouse, upstream water is to the interaction of dam body, as shown in Figure 1.
In described step Step2, for making the transducer probe assembly 6 of the water pressure sensor 4 being embedded in model dam body upstream face can accurate data measured, then water proof plastic sheeting 3 perforation and duck eye 5 that are attached to dam body upstream face are also fixed with screw 8, add valve rubber 7 with preventing water leakage, as shown in Figures 2 and 3.
Operating principle of the present invention is: adopt and place the water tank 2 of foil-type plastic bag as analogue means to simulate dam body upper pond in inside, when solving test, water problem is leaked in cast material and model dam body and water tank junction, replace water tank 2 one end sidewall dash with dam body model 1 upstream face, simulation storehouse, upstream water is to the effect of dam body; When measuring flowing pressure, water proof plastic sheeting 3 wears a duck eye 5 at corresponding point position, and transducer probe assembly 6 is passed by duck eye 5, and valve rubber 7 on pad, tightens with screw 8, ensures that water pressure sensor 4 measuring point edge is water-tight, again can data measured.
Model dam body upstream side can be placed the rectangle steelframe wooden case that a length is 3.5 times of model heights of dam by the present invention, the special foil-type plastic bag that in water tank, placement one is consistent with its inside dimension, water-tight during to ensure to be full of water in water tank; After complete to model dam body and the water tank assembling of simulation reservoir device, the plastic sheeting of model dam body upstream upstream face is bored a hole, the measuring head of water pressure sensor is passed plastic sheeting and fixes with waterproof rubber pad and screw means, both ensured that water pressure sensor was fixed in dam body upstream face corresponding site, its pressure measurement diaphragm is made again fully to contact with the water body in water tank, to record the force value of different tests operating mode drag dam body upstream face different parts.
The invention has the beneficial effects as follows: construction technology of the present invention is simple, without the need to adopting special leakage-proof apparatus at model dam body and water tank junction.Adopt the reservoir of the wooden case simulation dam body upstream of included foil-type plastic bag, solve cast material and model dam body and water tank junction and leak water problem, and record the difficult problem of hydrodynamic pressure value for model dam body upstream face.
Accompanying drawing explanation
Fig. 1 is medium power of the present invention test dam body-reservoir coupling system model;
Fig. 2 is water pressure sensor installation design sketch in the present invention;
Fig. 3 is that in the present invention, water pressure sensor installs decomposition texture schematic diagram;
Fig. 4 is that in the present invention, test examples records the maximum flowing pressure distribution of model dam body upstream face.
Label in Fig. 1-3: 1-dam body model, 2-water tank, 3-water proof plastic sheeting, 4-water pressure sensor, 5-duck eye, 6-transducer probe assembly, 7-valve rubber, 8-screw.
Detailed description of the invention
Embodiment 1: as Figure 1-3, the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test, Step1, after cast-in-place test dam body model 1 initial set form removal, assembling reservoir-dam body simulating on coupling system; By the analogue means of reservoir, adopt water tank 2, lift to dam body model 1 upstream side; Then lean on the sidewall of dam body model 1 side to cancel in water tank 2 replaces water tank 2 side sidewall to carry out dash with dam body model 1 upstream side, make water proof polybag and dam body model 1 upstream face close contact in water tank 2, to ensure that in water tank 2, water body can simulate the effect of storehouse, prototype dam body upstream water;
Step2, after the reservoir-dam body simulating on coupling system assembles of step Step1 completes, the water proof plastic sheeting 3 of dam body model 1 upstream upstream face is bored a hole, the pressure measurement diaphragm being arranged in dam body model 1 upstream face water pressure sensor 4 is fully contacted, to record the force value of dam body model 1 different parts under different tests operating mode with the water body in water tank 2.
In described step Step1, dam body model 1 adopts software connected mode to simulate with upper pond and water tank 2, and dam body-Ku water system can be made when earthquake motive force is tested to be coupled together, and when simulating earthquake, storehouse, upstream water is to the interaction of dam body.
In described step Step2, for making the transducer probe assembly 6 of the water pressure sensor 4 being embedded in model dam body upstream face can accurate data measured, then water proof plastic sheeting 3 perforation and duck eye 5 that are attached to dam body upstream face are also fixed with screw 8, add valve rubber 7 with preventing water leakage.
Embodiment 2: as Figure 1-3, the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test, Step1, after cast-in-place test dam body model 1 initial set form removal, assembling reservoir-dam body simulating on coupling system; By the analogue means of reservoir, adopt water tank 2, lift to dam body model 1 upstream side; Then lean on the sidewall of dam body model 1 side to cancel in water tank 2 replaces water tank 2 side sidewall to carry out dash with dam body model 1 upstream side, make water proof polybag and dam body model 1 upstream face close contact in water tank 2, to ensure that in water tank 2, water body can simulate the effect of storehouse, prototype dam body upstream water;
Step2, after the reservoir-dam body simulating on coupling system assembles of step Step1 completes, the water proof plastic sheeting 3 of dam body model 1 upstream upstream face is bored a hole, the pressure measurement diaphragm being arranged in dam body model 1 upstream face water pressure sensor 4 is fully contacted, to record the force value of dam body model 1 different parts under different tests operating mode with the water body in water tank 2.
In described step Step1, dam body model 1 adopts software connected mode to simulate with upper pond and water tank 2, and dam body-Ku water system can be made when earthquake motive force is tested to be coupled together, and when simulating earthquake, storehouse, upstream water is to the interaction of dam body.
In described step Step2, for making the transducer probe assembly 6 of the water pressure sensor 4 being embedded in model dam body upstream face can accurate data measured, then water proof plastic sheeting 3 perforation and duck eye 5 that are attached to dam body upstream face are also fixed with screw 8, add valve rubber 7 with preventing water leakage.
Concrete, the skeleton that water tank 2 is done by angle steel and channel-section steel, tumbles in plank sidewall, and special foil-type plastic bag is attached on plank inwall and prevents from leaking, and is specifically of a size of 7000mm(long) × 800mm(is wide) × 2200mm(is high).
This example is certain maximum height of dam is the Compacted Concrete Gravity Dam Section of 203m, according to supporting capacity 10t, is of a size of the characteristic of the three-way vibration platform of 3 × 3m, determines that the geometric similarity guide of this Case Experiments On A prototype and model is 1:100;
This example records model dam body upstream face and distributes, as Fig. 4 along the flowing pressure of height of dam.Can find out, seismic process Elastic dam body upstream face flowing pressure maximum value appears at about 1/3 height of dam position, and the additional mass method result of calculation that this and China existing earthquake resistance of hydraulic structure specification use is identical.
By reference to the accompanying drawings the specific embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (3)
1. the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test, is characterized in that: the concrete steps of described mounting method are as follows:
Step1, after cast-in-place test dam body model (1) initial set form removal, assembling reservoir-dam body simulating on coupling system; By the analogue means of reservoir, adopt water tank (2), lift to dam body model (1) upstream side; Then water tank (2) is cancelled by the sidewall of dam body model (1) side replaces water tank (2) side sidewall to carry out dash with dam body model (1) upstream side, make the interior water proof polybag of water tank (2) and dam body model (1) upstream face close contact, to ensure that water tank (2) interior water body can simulate the effect of storehouse, prototype dam body upstream water;
Step2, after the reservoir-dam body simulating on coupling system assembles of step Step1 completes, the water proof plastic sheeting (3) of dam body model (1) upstream upstream face is bored a hole, the pressure measurement diaphragm being arranged in dam body model (1) upstream face water pressure sensor (4) is fully contacted, to record the force value of dam body model (1) different parts under different tests operating mode with the water body in water tank (2).
2. the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test according to claim 1, it is characterized in that: in described step Step1, dam body model (1) adopts software connected mode to simulate with upper pond and water tank (2), dam body-Ku water system can be made when earthquake motive force is tested to be coupled together, and when simulating earthquake, storehouse, upstream water is to the interaction of dam body.
3. the mounting method of water pressure sensor in dam body-Ku water coincidence dynamic model test according to claim 1, it is characterized in that: in described step Step2, for making the transducer probe assembly (6) of the water pressure sensor (4) being embedded in model dam body upstream face can accurate data measured, then to being attached to water proof plastic sheeting (3) perforation of dam body upstream face and duck eye (5) and fixing with screw (8), add valve rubber (7) with preventing water leakage.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105804001A (en) * | 2016-06-02 | 2016-07-27 | 王嘉兴 | Loading method for arch dam model |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1076515A1 (en) * | 1981-12-09 | 1984-02-29 | Natorkhin Boris A | Method of modelling a hydraulic structure |
| CN203821294U (en) * | 2014-02-19 | 2014-09-10 | 河海大学 | Model test device for simulating reservoir earth dam seepage damage developing process |
| CN204125898U (en) * | 2014-10-14 | 2015-01-28 | 河海大学 | The experimental rig of Dam Foundation Seepage under a kind of failure under earthquake action |
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- 2015-07-13 CN CN201510407608.0A patent/CN105040633B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1076515A1 (en) * | 1981-12-09 | 1984-02-29 | Natorkhin Boris A | Method of modelling a hydraulic structure |
| CN203821294U (en) * | 2014-02-19 | 2014-09-10 | 河海大学 | Model test device for simulating reservoir earth dam seepage damage developing process |
| CN204125898U (en) * | 2014-10-14 | 2015-01-28 | 河海大学 | The experimental rig of Dam Foundation Seepage under a kind of failure under earthquake action |
Non-Patent Citations (1)
| Title |
|---|
| 王铭明 等: "重力坝地震动水压力试验研究", 《水电能源科学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804001A (en) * | 2016-06-02 | 2016-07-27 | 王嘉兴 | Loading method for arch dam model |
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