CN104762918A - Rock plug blasting model test water-pressure testing method - Google Patents
Rock plug blasting model test water-pressure testing method Download PDFInfo
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Abstract
The invention discloses a rock plug blasting model test water-pressure testing method, relates to a water-pressure testing method in a hydraulic model test, especially in a power station modification project water inlet rock plug blasting test and belongs to the field of hydraulic engineering model tests. The rock plug blasting model test water-pressure testing method is characterized by comprising the steps of firstly establishing a normal-state model according to the size of a rock plug blasting model, arranging pressure sensors in a zoning mode, selecting types of the pressure sensors and taking a pressure data acquisition scheme. The rock plug blasting model test water-pressure testing method is used for reasonably arranging the pressure measuring sensors in rock plug blasting model test water-pressure testing and has the advantages of being reliable, high in economical efficiency and accurate and reasonable in simulation.
Description
Technical field
The present invention relates in hydraulic model test, especially in the hydraulic pressure test method of power plant retrofit engineering water inlet chock blasting test, belong to model tests of hydraulic engineering field.
Background technology
Underwater rock plug burst is an important construction technology in field of water conservancy resources development and utilization and flood control, mitigation engineering, be mainly used in existing reservoir or lake, not emptying reservoir or do not build cofferdam condition under, build to economic security the inlet/outlet of all kinds of tunnel water channel.Power plant retrofit engineering is according to conventional water inlet, and not only constructional difficulties is comparatively large, engineering safety is lower, and construction investment is larger.Due to Practical Project water inlet geological conditions, often very complicated, chock blasting scale is large, and technical difficulty and risk are all larger.Rock fills in the design scheme at the mouth of a river and engineering measure is general all along with engineering construction progress, and water inlet geological conditions discloses further and the progress of scientific experimentation continues modification and perfection.
The main purpose that rock fills in mouth of a river Blasting Models test is filled in the simulation of mouth of a river explosion, research rock fills in the poly-quarrel in the mouth of a river (comprising slag collecting pit, gate shaft etc.) and water-filling, tonifying Qi effect, surge wave pressure distribution, the feature of the key element such as velocity flow profile and rule under collection quarrel bodily form optimization, gate shaft surging height and normal power generation condition, for selected rock plug arrange and blasting scheme provide optimize according to or suggestion.
Wherein rock fills in the important content that the water-pressure survey of hole, downstream, mouth of a river section is selection blasting scheme, therefore will carry out rational water-pressure survey to hole, downstream section.
Summary of the invention
The technical problem to be solved in the present invention is just to provide a kind of method of chock blasting model testing hydraulic pressure test in hydraulic model test, obtains the variation in water pressure process of hole, downstream section better.
Chock blasting model testing hydraulic pressure test method, comprises following content:
Set up normal model according to chock blasting model scale, subregion arranges pressure sensor, pressure sensor type selecting, pressure data acquisition scheme;
Described sets up normal model according to chock blasting model scale: model specifically comprises reservoir, rock fills in the mouth of a river, diversion section, gate shaft, wherein:
Described reservoir adopts 4mm steel plate and steel frame welding production; For being conducive in slag collecting pit the Measurement & Control of heap quarrel and apex cavity pressure, hydrodynamic force, water inlet side, reservoir hillside adopts steel plate to make; If massif surface is Ah with horizontal plane angle, then reservoir hillside water inlet side steel plate and horizontal plane angle are (Ah-3) °, and reservoir water inlet side landform utilizes cement mortar to make on steel plate;
Described rock is filled in the mouth of a river and is comprised: rock cock body, linkage section, slag collecting pit;
Described rock cock body comprises rock cock body shell, filler, rock cock body collet;
Described rock cock body shell adopts steel plate to make, its shape is circular platform type, rock slag lower exit side section size and round platform height are explosion design load, upstream side cross-sectional area comparatively explosion design load increases, rock slag lower exit side section size constancy, upstream side cross-sectional area increases, and round platform height is constant, and after increasing, the volume of round platform is 1.7:1 with design rock plug hole volume ratio; Inventor through the multiple quick-fried quantity of slag relatively after draw the distribution adopting the volume of 1.7:1 to be scaled amount of filler in model testing to reflect true quick-fried slag.
Described filler reduces by model scale based on the bulk solid grating produced after prototype rock blasting, according to the round platform volume after increasing, mixes cement by proportioning, albarium, aggregate, Silicone acrylic emulsion mix and stir and form;
Described rock cock body collet employing thickness is that the tempered glass of 0.8 ~ 1.2cm makes, and diameter is slightly larger than rock cock body shell downstream section; Inventor finds to only have through repetition test and adopts above-mentioned tempered glass to make collet guarantee can not to crush rock cock body collet at filler, simultaneously in test can under reasonable explosive charge successful explosion collet, and the quick-fried slag produced is within the scope of the quick-fried slag of design.
A kind of chock blasting model testing rock plug method to set up, it is characterized in that: during explosion bulge test, prototype rock mass is converted into the filling of corresponding grating loose material by the loose ratio of 1:1.7 by model water inlet rock plug section, rock cock body collet is made with the tempered glass that thickness is 0.8 ~ 1.2cm, with detonator blasting filler and collet, filler is dropped in the slag collecting pit of downstream under water-borne.By combining ga ge relation in different reservoir level and rock plug hole, slag charge distribution in measuring set pit.Described detonator is 2 instantaneous caps, the embedding location of two detonators in damming body is: A detonator be placed in be parallel to round platform collet plane on, described plane and collet are at a distance of no more than 5cm, A detonator present position is apart from round platform central axis 10cm, in the vertical direction is the minimum point of this circle, and disposing way is parallel with collet, and an other detonator B is placed in the round platform center of circle, degree of depth centre position, direction is vertical with collet.
Described subregion arranges that pressure sensor refers to, model is swum over to from rock plug gate downstream and is divided into linkage section, slag collecting pit section, diversion section, gate shaft, gate, tail water section totally 6 parts;
It is average that length direction is pressed on described linkage section top, and evenly arrange 3 L pressure sensors, length direction is equally divided into 4 parts, sidepiece relevant position arranges 3 L pressure sensors;
Described slag collecting pit section top arranges 3 J pressure sensors in length direction ratio 1:2:3, sidepiece parallel position is according to 3:2:1 position, 3 J pressure sensors are set, choose diverse location through inventor and carry out repetition test discovery, sensor arrangement form only in this way just can record the maximum pressure value of slag collecting pit section;
Described diversion section top is equally divided into 4 sections by length direction, and arrange 3 Y pressure sensors, sidepiece relevant position is consistent with top;
Described gate shaft, its upstream face is from the distance diversion section top 10cm of bottom, and arrange Z pressure sensor according to short transverse by equal altitudes interval, extreme higher position is set to peak of surging, and sum is set to 6; Its downstream face arranges 6 sensors equally, and position height is all than 6 sensor height 10cm that upstream is arranged; Inventor finds through repetition test, and the set-up mode only having upstream and downstream so just can obtain the maximum pressure fluctuation meter value in gate shaft, and such arrangement is the method for arranging that number of sensors is saved most simultaneously;
Described gate center horizontal arrangement 2 G sensors, at a distance of 2cm, four limit mid points arrange 4 G sensors apart from door limit 3cm;
3 W sensors are arranged according to distance 1:1 in described tail water section top, and 3 W sensors are arranged in relevant position, side.
Described pressure sensor type selecting refers to:
L pressure sensor: maximum pressure is 10m, frequency response 100Hz, precision 0.05m;
J pressure sensor: maximum pressure is 20m, frequency response 100Hz, precision 0.05m;
Y pressure sensor: maximum pressure is 50m, frequency response 100Hz, precision 0.05m;
Z pressure sensor: maximum pressure is 100m, frequency response 200Hz, precision 0.01m;
G pressure sensor: maximum pressure is 200m, frequency response 500Hz, precision 0.10m;
W pressure sensor: maximum pressure is 10m, frequency response 100Hz, precision 0.05m;
After inventor's repeated comparison and screening, draw above Choice of Sensors, only under such selecting type scheme, the pressure characteristic of each position could be obtained, and economic optimum.
Described pressure data acquisition scheme refers to, above-mentioned each position pressure sensor should adopt the single-sensor without amplifying circuit, gone between and access bridge amplification circuit and access strain gauge, the pressure sensor of each subregion should be accessed same strain gauge when accessing strain gauge, test draws when the pressure sensor of different subregion accesses same strain gauge, can cause the impact that can not estimate to measurement result.
The present invention has following beneficial effect:
(1) the invention provides a kind of method of chock blasting model testing hydraulic pressure test;
(2) the invention provides a kind of method of reasonable Arrangement load cell in chock blasting model testing hydraulic pressure test;
(3) the present invention has method reliably, and economy is high, and simulation is rational advantage accurately.
Accompanying drawing explanation
Fig. 1 is the block mold schematic diagram of inventive method;
Fig. 2 is inventive method stepwise schematic views;
Fig. 3 is that schematic diagram arranged by the pressure sensor of inventive method;
Fig. 4 be inventive method gate on pressure sensor arrange schematic diagram;
Fig. 5 is inventive method pressure sensor connection diagram corresponding to strain gauge;
The inventive system comprises: 1 reservoir, 2 rocks fill in the mouth of a river, 21 linkage sections, 22 slag collecting pits, rock cock body, 4 gate shafts, 5 diversion sections.
Detailed description of the invention
Embodiment one
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
Chock blasting model testing rock plug method to set up, first sets up normal model according to chock blasting model scale: model specifically comprises reservoir 1, rock fills in the mouth of a river 2, diversion section 5, gate shaft 4, wherein:
Described reservoir adopts 4mm steel plate and steel frame welding production; For being conducive in slag collecting pit the Measurement & Control of heap quarrel and apex cavity pressure, hydrodynamic force, water inlet side, reservoir hillside adopts steel plate to make; If massif surface is Ah with horizontal plane angle, then reservoir hillside water inlet side steel plate and horizontal plane angle are (Ah-3) °, and reservoir water inlet side landform utilizes cement mortar to make on steel plate;
Described rock is filled in the mouth of a river 2 and is comprised: rock cock body, linkage section 21, slag collecting pit 22;
Described rock cock body comprises rock cock body shell, filler, rock cock body collet;
Described rock cock body shell adopts steel plate to make, and its shape is circular platform type, rock slag lower exit side section size constancy, and upstream side cross-sectional area increases, and round platform height is constant, and after increasing, the volume of round platform is 1.7:1 with design rock plug hole volume ratio; Inventor through the multiple quick-fried quantity of slag relatively after draw the distribution adopting the volume of 1.7:1 to be scaled amount of filler in model testing to reflect true quick-fried slag.
Described filler reduces by model scale based on the bulk solid grating produced after prototype rock blasting, according to the round platform volume after increasing, mixes cement by proportioning, albarium, aggregate, Silicone acrylic emulsion mix and stir and form;
Above-mentioned part by weight is, aggregate: (cement+albarium+Silicone acrylic emulsion)=1:1;
Cement: albarium: Silicone acrylic emulsion: water=1:1:0.2:2.
Described rock cock body collet employing thickness is that the tempered glass of 0.8 ~ 1.2cm makes, and diameter is slightly larger than rock cock body shell downstream section; Inventor finds to only have through repetition test and adopts above-mentioned tempered glass to make collet guarantee can not to crush rock cock body collet at filler, simultaneously in test can under reasonable explosive charge successful explosion collet, and the quick-fried slag produced is within the scope of the quick-fried slag of design.
A kind of chock blasting model testing rock plug method to set up, it is characterized in that: during explosion bulge test, prototype rock mass is converted into the filling of corresponding grating loose material mixture by the loose ratio of 1:1.7 by model water inlet rock plug section, rock cock body collet is made with the tempered glass that thickness is 0.8 ~ 1.2cm, with detonator blasting filler and collet, filler is dropped in the slag collecting pit of downstream under water-borne.By combining ga ge relation in different reservoir level and rock plug hole, slag charge distribution in measuring set pit; Described detonator is 2 instantaneous caps, the embedding location of two detonators in damming body is: A detonator be placed in be parallel to round platform collet plane on, described plane and collet are at a distance of no more than 5cm, A detonator present position is with round platform central axis for the center of circle, and radius is on the circle of 10cm, and in the vertical direction is the minimum point of this circle, disposing way is parallel with collet, an other detonator B is placed in the round platform center of circle, and degree of depth centre position, direction is vertical with collet.
Described subregion arranges that pressure sensor refers to, model is swum over to from rock plug gate downstream and is divided into linkage section 21, slag collecting pit section 22, diversion section 5, gate shaft 4, gate 3, tail water section 6 totally 6 parts;
It is average that length direction is pressed on described linkage section top, and evenly arrange 3 L pressure sensors and be respectively L1, L2, L3, length direction is equally divided into 4 parts, sidepiece relevant position arranges 3 L pressure sensors, is respectively L4, L5, L6;
Described slag collecting pit section top arranges 3 J pressure sensors in length direction ratio 1:2:3 and is respectively J1, J2, J3, sidepiece parallel position, according to 3:2:1 position, arranges 3 J pressure sensors, is respectively J4, J5, J6, chooses diverse location through inventor and carries out repetition test discovery, and sensor arrangement form only in this way just can record the maximum pressure value of slag collecting pit section;
Described diversion section top is equally divided into 4 sections by length direction, arranges 3 Y pressure sensors and is respectively Y1, Y2, Y3, and sidepiece relevant position arranges 3 the Y pressure sensors consistent with top, is respectively Y4, Y5, Y6;
Described gate shaft, its upstream face is from the distance diversion section top 10cm of bottom, and arrange Z pressure sensor according to short transverse by equal altitudes interval, extreme higher position is set to peak of surging, and sum is set to 6, is respectively Z1, Z2, Z3, Z4, Z5, Z6; Its downstream face arranges 6 sensors equally, and position height all than 6 sensor height 10cm that upstream is arranged, is respectively Z7, Z8, Z9, Z10, Z11, Z12; Inventor finds through repetition test, and the set-up mode only having upstream and downstream so just can obtain the maximum pressure fluctuation meter value in gate shaft, and such arrangement is the method for arranging that number of sensors is saved most simultaneously;
Described gate center horizontal arrangement 2 G sensors are respectively G1, G2, and at a distance of 2cm, four limit mid points arrange 4 G sensors apart from door limit 3cm; Be respectively G3, G4, G5, G6;
Described tail water section top is according to equidistantly arranging that 3 W sensors are respectively W1, W2, W3, and 3 W sensors are arranged in relevant position, side, are respectively W4, W5, W6.
Described pressure sensor type selecting refers to:
L pressure sensor: maximum pressure is 10m, frequency response 100Hz, precision 0.05m;
J pressure sensor: maximum pressure is 20m, frequency response 100Hz, precision 0.05m;
Y pressure sensor: maximum pressure is 50m, frequency response 100Hz, precision 0.05m;
Z pressure sensor: maximum pressure is 100m, frequency response 200Hz, precision 0.01m;
G pressure sensor: maximum pressure is 200m, frequency response 500Hz, precision 0.10m;
W pressure sensor: maximum pressure is 10m, frequency response 100Hz, precision 0.05m;
Described pressure data acquisition scheme refers to, above-mentioned each position pressure sensor should adopt the single-sensor without amplifying circuit, gone between and access bridge amplification circuit and access strain gauge, the pressure sensor of each subregion should be accessed same strain gauge when accessing strain gauge, test draws when the pressure sensor of different subregion accesses same strain gauge, can cause the impact that can not estimate to measurement result.
In above scheme, totally 7 groups of sensors access in 7 strain gauges, and Fig. 4 is shown in method of attachment.
Claims (10)
1. chock blasting model testing hydraulic pressure test method, is characterized in that: comprise following content: set up normal model according to chock blasting model scale, and subregion arranges pressure sensor, pressure sensor type selecting, pressure data acquisition scheme; Described sets up normal model according to chock blasting model scale: model specifically comprises reservoir, rock fills in the mouth of a river, diversion section, gate shaft.
2. chock blasting model testing hydraulic pressure test method according to claim 1, it is characterized in that: described subregion arranges that pressure sensor refers to, model is swum over to from rock plug gate downstream and is divided into linkage section, slag collecting pit section, diversion section, gate shaft, gate, tail water section totally 6 parts.
3. chock blasting model testing hydraulic pressure test method according to claim 2, it is characterized in that: described linkage section top is average by length direction, evenly arrange 3 L pressure sensors, length direction is equally divided into 4 parts, sidepiece relevant position arranges 3 L pressure sensors.
4. chock blasting model testing hydraulic pressure test method according to claim 2, it is characterized in that: described slag collecting pit section top arranges 3 J pressure sensors in length direction ratio 1:2:3, sidepiece parallel position, according to 3:2:1 position, arranges 3 J pressure sensors.
5. chock blasting model testing hydraulic pressure test method according to claim 2, is characterized in that: described diversion section top is equally divided into 4 sections by length direction, and arrange 3 Y pressure sensors, sidepiece relevant position is consistent with top.
6. chock blasting model testing hydraulic pressure test method according to claim 2, it is characterized in that: described gate shaft, its upstream face is from the distance diversion section top 10cm of bottom, according to short transverse, Z pressure sensor is set by equal altitudes interval, extreme higher position is set to peak of surging, and sum is set to 6; Its downstream face arranges 6 sensors equally, and position height is all than 6 sensor height 10cm that upstream is arranged; Inventor finds through repetition test, and the set-up mode only having upstream and downstream so just can obtain the maximum pressure fluctuation meter value in gate shaft, and such arrangement is the method for arranging that number of sensors is saved most simultaneously.
7. chock blasting model testing hydraulic pressure test method according to claim 2, is characterized in that: described gate center horizontal arrangement 2 G sensors, and at a distance of 2cm, four limit mid points arrange 4 G sensors apart from door limit 3cm.
8. chock blasting model testing hydraulic pressure test method according to claim 2, is characterized in that: 3 W sensors are arranged according to distance 1:1 in described tail water section top, and 3 W sensors are arranged in relevant position, side.
9. chock blasting model testing hydraulic pressure test method according to claim 1, is characterized in that: described pressure sensor type selecting refers to:
L pressure sensor: maximum pressure is 10m, frequency response 100Hz, precision 0.05m;
J pressure sensor: maximum pressure is 20m, frequency response 100Hz, precision 0.05m;
Y pressure sensor: maximum pressure is 50m, frequency response 100Hz, precision 0.05m;
Z pressure sensor: maximum pressure is 100m, frequency response 200Hz, precision 0.01m;
G pressure sensor: maximum pressure is 200m, frequency response 500Hz, precision 0.10m;
W pressure sensor: maximum pressure is 10m, frequency response 100Hz, precision 0.05m.
10. chock blasting model testing hydraulic pressure test method according to claim 1, it is characterized in that: described pressure sensor type selecting refers to: described each position pressure sensor adopts the single-sensor without amplifying circuit, being gone between and access bridge amplification circuit and access strain gauge, when accessing strain gauge, the pressure sensor of each subregion being accessed same strain gauge.
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Cited By (3)
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| CN110057488A (en) * | 2019-04-08 | 2019-07-26 | 浙江省水利河口研究院 | The maximum pressure of tidal bore impingement cylinder stake and its calculation method of vertical characteristics |
| CN110260734A (en) * | 2019-07-17 | 2019-09-20 | 辽宁省水利水电勘测设计研究院有限责任公司（原名称为辽宁省水利水电勘测设计研究院） | A kind of open waters absence of vortices chock blasting arragement construction of concerning security matters engineering |
| CN110440980A (en) * | 2019-09-03 | 2019-11-12 | 重庆交通大学 | A kind of supercritical CO2Phase conversion pulse is lauched biological effect test macro and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110057488A (en) * | 2019-04-08 | 2019-07-26 | 浙江省水利河口研究院 | The maximum pressure of tidal bore impingement cylinder stake and its calculation method of vertical characteristics |
| CN110260734A (en) * | 2019-07-17 | 2019-09-20 | 辽宁省水利水电勘测设计研究院有限责任公司（原名称为辽宁省水利水电勘测设计研究院） | A kind of open waters absence of vortices chock blasting arragement construction of concerning security matters engineering |
| CN110260734B (en) * | 2019-07-17 | 2024-04-02 | 辽宁省水利水电勘测设计研究院有限责任公司（原名称为辽宁省水利水电勘测设计研究院） | Public water area non-vortex rock plug blasting arrangement structure of secret-related engineering |
| CN110440980A (en) * | 2019-09-03 | 2019-11-12 | 重庆交通大学 | A kind of supercritical CO2Phase conversion pulse is lauched biological effect test macro and method |
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