CN113419279A - Dam safety rapid grading early warning method under earthquake condition - Google Patents
Dam safety rapid grading early warning method under earthquake condition Download PDFInfo
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- CN113419279A CN113419279A CN202110574642.2A CN202110574642A CN113419279A CN 113419279 A CN113419279 A CN 113419279A CN 202110574642 A CN202110574642 A CN 202110574642A CN 113419279 A CN113419279 A CN 113419279A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
- G01V1/307—Analysis for determining seismic attributes, e.g. amplitude, instantaneous phase or frequency, reflection strength or polarity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/01—Measuring or predicting earthquakes
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/10—Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a dam safety rapid grading early warning method under an earthquake condition, which comprises the following steps: establishing geographical coordinate information of the concerned dam; rapidly acquiring seismic information, wherein the seismic information comprises seismic coordinate information and seismic magnitude; calculating the influence ranges of different levels of intensity according to the seismic information obtained by implementation; comparing the distance between the geographic coordinate of each dam and the seismic source coordinate to determine the encountered seismic intensity; and comparing the calculated dam encounter intensity with the fortification intensity, and performing grading early warning.
Description
Technical Field
The invention relates to the field of dam safety, in particular to a dam safety rapid grading early warning method under an earthquake condition.
Technical Field
Nearly 10 ten thousand dams are built in China, and China is located between two earthquake zones in the world, namely a Pacific earthquake zone and an Eurasian earthquake zone, earthquakes are frequent, and the dam is easily lost due to earthquakes, particularly strong earthquakes and above earthquakes. The earthquake fortification in China is based on the principle that small earthquakes are not damaged, medium earthquakes can be repaired, and large earthquakes cannot fall down. In order to deal with earthquake working conditions, hydraulic buildings such as dams and the like also determine fortification categories and earthquake resistant standards according to site basic intensity, building grades and the like. The actual degree of damage suffered by a dam is affected by seismic intensity, which is related to seismic magnitude, seismic source depth, geological structure, and dam-to-seismic source distance. Dams are subject to varying levels of severity, with varying degrees of damage.
At present, the national earthquake administration realizes real-time early warning of earthquake magnitude and earthquake source depth and informs related management personnel through various ways, but the damage degree of the dam cannot be rapidly preliminarily judged. The method is used for effectively realizing grading early warning on dam safety under the condition of encountering earthquake. The seismic intensity of the dam position needs to be rapidly calculated and compared with the fortification standard, and grading early warning is achieved.
Disclosure of Invention
The invention aims to provide a dam safety rapid grading early warning method under an earthquake condition aiming at the problem that the damage degree of a dam cannot be rapidly and preliminarily judged after the dam encounters an earthquake under the current condition.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dam safety rapid grading early warning method under earthquake conditions is characterized by comprising the following steps: establishing geographical coordinate information of the concerned dam; rapidly acquiring seismic information, wherein the seismic information comprises seismic coordinate information and seismic magnitude; calculating the influence ranges of different levels of intensity according to the quickly acquired seismic information; comparing the distance between the geographic coordinate of each dam and the seismic source coordinate to determine the encountered seismic intensity; and comparing the calculated dam encounter intensity with the fortification intensity, and performing grading early warning.
The technical scheme adopted by the invention has the beneficial effects that: by adopting the rapid grading early warning method, the intensity of the dam after the earthquake can be rapidly calculated, and the intensity is compared with the fortification standard, so that more targeted work after the earthquake is adopted.
Drawings
FIG. 1 is a flow chart of one embodiment of a method according to the present invention;
fig. 2 is a logic diagram of an embodiment.
Detailed Description
Reference is made to the accompanying drawings. The invention provides a dam safety rapid grading early warning method under an earthquake condition, which comprises the following steps:
(1) establishing geographical coordinate information and earthquake fortification information of the concerned dam:
fi(x，y，Sis provided with)(i＝1，…,n)；
Wherein i represents one of the dams, f represents the geographic coordinate information of a dam, x and y represent longitude and latitude, and SIs provided withAnd n represents the total number of the concerned dams.
The geographical coordinate information of each concerned dam is the coordinate of the geometric center of the hydropower station dam, and a geographical coordinate information base of the concerned dam is established by using the geographical coordinate information of the constructed hydropower station dam. The earthquake fortification information is the earthquake standard adopted by the design of the hydropower station dam and is expressed by fortification intensity. At present, 1069 large and medium hydropower station dam geographical information and fortification intensity information bases are integrated.
(2) Rapidly acquiring seismic information: fj(X，Y，M)；
Where j represents one of the earthquakes and F represents information about the source of the earthquake, where X, Y, M represents longitude, latitude, and magnitude, respectively.
And establishing a timing task by a computer program, acquiring the seismic information of the Chinese seismic table network every 3 minutes, comparing the acquired seismic information with the acquired information, and calculating the influence ranges of different levels of intensity if the acquired seismic information is new information.
(3) And calculating the influence ranges of different levels of intensity.
According to statistical analysis, the seismic intensity attenuation relation model adopts an ellipse model:
S＝A+BM+Clg(R+R0)
wherein S is seismic intensity, M is seismic magnitude, R is epicenter distance (km), A, B, C, R0The regression coefficient of the attenuation relation of the earthquake is related to the region, and the regression analysis obtains the national regression coefficients of four regions according to 1000 earthquake motion records and 1800 earthquake intensity data at home and abroad, and is specifically as follows:
regression coefficient of seismic intensity attenuation relation
Because the angles of the major axis, the minor axis and the geographic coordinates of the ellipse cannot be determined in real time, the intensity range is determined only by using the circular model of the major axis for conservative consideration.
Calculating the seismic intensity S of the seismic source (R is 0) by using the circular model of the formula0Calculating the major axis R of each seismic intensity smaller than the seismic intensity by taking the seismic intensity S as a referenceK(K＝1，…,S0)。
(4) And determining the seismic intensity of the position of the dam.
Calculating the distance between dam and seismic source, Dij＝fi(x，y)-Fj(X, Y) and then with DijAnd RKComparing to determine the intensity S of the damijk。
For the step, a quick and intuitive parallel scheme can be provided at the same time, so that the responsible personnel can make intuitive comparison with the prompt (or alarm) signal, namely:
and (3) marking the geographical coordinate information of each concerned dam as a marking point on a map in the step (1).
And (3) after the corresponding relation between the distance from the seismic source and the seismic intensity is calculated, making a circle in the map by taking the geographic coordinate point of the seismic source as the center of the circle and the distances from different seismic intensities to the center of the circle as the radius to form a result of the logic diagram shown in the figure 2, wherein the result comprises a circle corresponding to the seismic intensity of 5, and a non-made circle with the seismic intensity of less than 5 is used for displaying by using a touch screen.
Furthermore, the circles can be drawn one by one when the seismic intensity is more than 5 according to the calculation accuracy of the seismic intensity as a unit, and can be displayed and hidden in a grading manner along with the enlargement and reduction of the map and the movement of a display area, so that the relevant responsible personnel can visually see the seismic intensity of the dam concerned by the responsible personnel.
(5) And (5) grading early warning.
Intensity S of dam positionijkIntensity of fortification with dam SIs provided withAnd comparing and carrying out grading early warning.
If Sijk>SIs provided withFirst-level early warning;
if Sijk＝SIs provided withSecond-level early warning;
③ if 5 is less than or equal to Sijk<SIs provided withThird-level early warning;
fourthly, if Sijk<And 5, four-stage early warning.
Claims (3)
1. A dam safety rapid grading early warning method under earthquake conditions is characterized by comprising the following steps: establishing geographical coordinate information of the concerned dam; rapidly acquiring seismic information, wherein the seismic information comprises seismic coordinate information and seismic magnitude; calculating the influence ranges of different levels of intensity according to the quickly acquired seismic information; comparing the distance between the geographic coordinate of each dam and the seismic source coordinate to determine the encountered seismic intensity; and comparing the calculated dam encounter intensity with the fortification intensity, and performing grading early warning.
2. The dam safety rapid grading early warning method under the earthquake condition as claimed in claim 1, characterized in that when calculating the influence ranges of different grades of intensity according to the rapidly acquired earthquake information, the following rapid calculation method is adopted:
the seismic intensity attenuation relation model adopts an ellipse model:
S＝A+BM+Clg(R+R0)
wherein S is seismic intensity, M is seismic magnitude, R is epicenter distance (km), A, B, C, R0Is a regression coefficient;
determining a severity range using only a circular model of the earth's long axis;
calculating seismic intensity S of the seismic source (R is 0) by using the circular model0Calculating the major axis R of each seismic intensity smaller than the seismic intensity by taking the seismic intensity S as a referenceK(K＝1，…，S0)。
When the seismic intensity of the position of the dam is determined, the distance D between the dam and the seismic source is calculatedijThen with DijAnd RKComparing the seismic intensity S of the dam positionijk。
3. The dam safety rapid grading early warning method under the earthquake condition as claimed in claim 1, characterized in that the geographical coordinate information of each concerned dam is taken as a marking point and marked on a map.
Acquiring seismic information, calculating a corresponding relation between the distance from the seismic source and seismic intensity, and making a circle in the map by taking a geographic coordinate point of the seismic source as a circle center and the distances from different seismic intensities to the circle center as radii, wherein the circle comprises a circle corresponding to the seismic intensity of 5, and a circle is not made when the seismic intensity is less than 5, and the map is displayed by a touch screen;
the circles are drawn one by one when the seismic intensity is more than 5 according to the calculation accuracy of the seismic intensity as a unit, and can be displayed and hidden in a grading manner along with the enlargement and reduction of the map and the movement of a display area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110574642.2A CN113419279A (en) | 2021-05-25 | 2021-05-25 | Dam safety rapid grading early warning method under earthquake condition |
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| CN202110574642.2A CN113419279A (en) | 2021-05-25 | 2021-05-25 | Dam safety rapid grading early warning method under earthquake condition |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966196A (en) * | 2012-10-26 | 2013-03-13 | 青岛理工大学 | Earthquake-proof safety assessment method for engineering structure seismic intensity exceeding fortification intensity |
| CN107861446A (en) * | 2017-10-04 | 2018-03-30 | 上海市房地产科学研究院 | A kind of monitoring system and its application method for protecting building |
| CN108364119A (en) * | 2018-01-11 | 2018-08-03 | 中国航空规划设计研究总院有限公司 | A kind of Cultural relics in museum quakeproof safety appraisal procedure |
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2021
- 2021-05-25 CN CN202110574642.2A patent/CN113419279A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966196A (en) * | 2012-10-26 | 2013-03-13 | 青岛理工大学 | Earthquake-proof safety assessment method for engineering structure seismic intensity exceeding fortification intensity |
| CN107861446A (en) * | 2017-10-04 | 2018-03-30 | 上海市房地产科学研究院 | A kind of monitoring system and its application method for protecting building |
| CN108364119A (en) * | 2018-01-11 | 2018-08-03 | 中国航空规划设计研究总院有限公司 | A kind of Cultural relics in museum quakeproof safety appraisal procedure |
Non-Patent Citations (1)
| Title |
|---|
| 文彦君 等: "延怀盆地现代构造应力场模拟与官厅水库大坝地震安全性初探", 《地震地质》 * |
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