CN113094632B - Method for processing local deformation settlement optical fiber monitoring data of end part of bank protection soft raft body - Google Patents
Method for processing local deformation settlement optical fiber monitoring data of end part of bank protection soft raft body Download PDFInfo
- Publication number
- CN113094632B CN113094632B CN202110413498.4A CN202110413498A CN113094632B CN 113094632 B CN113094632 B CN 113094632B CN 202110413498 A CN202110413498 A CN 202110413498A CN 113094632 B CN113094632 B CN 113094632B
- Authority
- CN
- China
- Prior art keywords
- soft
- bank protection
- row
- optical fiber
- protection soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Computational Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Algebra (AREA)
- Revetment (AREA)
Abstract
The invention discloses a method for processing local deformation settlement optical fiber monitoring data at the end part of a bank protection soft raft, which comprises the following steps:
the final stretching elongation after the soft mattress is deformed has the following calculation formula:
in the formula, z is the final floating or sinking depth of the bank protection soft raft; h is the tensile strength of the soft polypropylene knitted cloth in the position width; x is the range of the scour pit (the middle of the bank protection soft row head is 0); gamma is the weight of the soft raft and the ballast above the soft raft in unit length; rho is the water flow density; v is the water flow velocity; eta is a dimensionless adjustment parameter; the invention can be used for monitoring the erosion deformation characteristic of the bank protection soft row in real time.
Description
Technical Field
The invention belongs to the field of hydraulic monitoring, and particularly relates to an optical fiber monitoring data processing method for settlement of partial deformation of the end part of a bank protection soft raft body due to small-range washout pits at the end part of the raft body.
Background
At present, the optical fiber sensing technology is widely applied to the engineering field, such as tunnels, bridges, high-speed rails, ports, wharfs, house buildings and the like. In the above-described construction, the optical fiber sensor is usually fixed to a rigid structure, and changes in physical properties of the object are sensed by causing brillouin shift change in the pulse laser in the optical fiber sensor when the rigid structure is slightly deformed, and using a relationship in which the amount of change in the shift of the pulse laser linearly changes with strain. Different from a rigid structure, the bank protection soft row belongs to a flexible structure, the bank protection soft row is often greatly settled or floated under the action of water flow scouring, and when the optical fiber sensor is adopted for monitoring, theoretical analysis is needed to be carried out on optical fiber data according to the deformation characteristic of the flexible structure of the bank protection soft row. However, at the present stage, a processing method for monitoring data by using a fiber scour settlement suitable for the end part of the bank protection soft row head with pertinence does not exist.
Disclosure of Invention
The invention provides a settlement optical fiber monitoring data processing method for local deformation of the end part of a bank protection soft raft body, which is used for monitoring the erosion deformation characteristic of the bank protection soft raft body in real time.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a local deformation settlement optical fiber monitoring data processing method for the end part of a bank protection soft raft body is disclosed, wherein the calculation formula of the scouring deformation form of the soft raft body is as follows:
the final stretching elongation after the soft mattress is deformed has the following calculation formula:
in the formula, z is the final floating or sinking depth of the bank protection soft raft;
h is the tensile strength of the soft polypropylene knitted cloth in the position width;
x is the range of the scour pit (the middle of the bank protection soft row head is 0);
gamma is the weight of the soft raft and the ballast (D-shaped interlocking block) above the soft raft in unit length;
rho is the water flow density;
v is the water flow velocity;
eta is a dimensionless adjustment parameter;
the data processing steps are as follows:
1) calculating according to the light measured data integral to obtain the actual elongation of the bank protection software row optical fiber;
2) assuming an initial tuning parameter η ═ η0Calculating the deformation form and the scouring depth of the bank protection software row according to the formula (1) and by combining with the field measured data;
3) calculating to obtain the theoretical elongation of the bank protection soft row according to a formula (2);
4) comparing the actual elongation of the shore protection soft row monitoring optical fiber with the theoretical elongation of the shore protection soft row, and gradually adjusting the parameter eta ═ eta1,η2,η3…, until the actual elongation of the shore protection soft row monitoring optical fiber is equal to the theoretical elongation of the shore protection soft row, and determining the final value of the adjustment parameter eta;
5) and substituting the final value of the adjustment parameter eta into a formula (1) to obtain the final form and the scouring depth of the bank protection soft row.
The invention has the advantages and positive effects that: based on the small-range washout pits, the deformation form of the end part of the bank protection soft row is calculated by inversion of optical fiber monitoring data when the end part of the bank protection soft row is subjected to local deformation and settlement.
Drawings
FIG. 1 is a diagram showing a large-scale erosion pit damage mode appearing at the end part of a bank protection soft raft;
FIG. 2 is a graph of the relationship between the tuning parameters and the depth of the flush pits.
In the figure: 1 is a riverbed, 2 is an initial configuration of bank protection soft row arrangement, 3 is ballast above the soft row arrangement, and 4 is a configuration of the soft row after scouring deformation.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
when the bank protection soft row is under the water flow scouring action, a small-range scouring pit appears at the end part of the row body, and a damage mode that the end part of the row body is locally deformed and settled is considered, the bank protection soft row is arranged into a flexible knitted structure, and the arrangement is stretched and deformed no matter the soft row is arranged to be turned upwards or sink along with the scouring pit, so the following assumptions are made for the two damage modes:
firstly, assuming that the soft row arrangement and the ballast (D-shaped interlocking block) above the soft row arrangement are in good connection state, the soft row arrangement and the ballast (D-shaped interlocking block) above the soft row arrangement are synchronously deformed, and the ballast (D-shaped interlocking block) above the soft row arrangement is uniformly distributed;
secondly, assuming that the soft row arrangement and the ballast (D-shaped interlocking block) above the soft row arrangement are damaged in the mode, the row bodies at two ends of the scouring pit are only inclined at an angle, namely the simple support constraint;
thirdly, the comprehensive elastic modulus of the soft mattress is between the elastic modulus of the ballast (D-shaped interlocking block) concrete and the elastic modulus of the arrangement, a simple beam model is adopted, the deflection of a simple beam consisting of 2 materials is firstly solved, and then the deflection formula of the simple beam in material mechanics is substituted, and the comprehensive elastic modulus E of the soft mattress is reversely pushed out;
and fourthly, assuming that the soft raft above the scouring pit is arranged and the ballast (the D-shaped interlocking block) above the scouring pit is deformed to meet the catenary form, namely the rows at two ends of the scouring pit are simply supported and fixed, the soft raft naturally droops under the action of gravity and hydrodynamic pressure, the hydrodynamic pressure vertical to the arrangement direction can be decomposed into horizontal force and vertical force, and assuming that the horizontal force is zero (the horizontal component force of any point of arrangement is not changed), the hydrodynamic pressure is completely converted into the vertical force.
Referring to fig. 1, when a small-range washout pit appears at the end of a bank protection soft raft and the end of the raft is locally deformed and settled, the catenary deformation of the raft head can be determined according to assumed conditions and damage forms, and the calculation formula of the soft raft washout deformation form finally considering the hydrodynamic pressure is as follows:
the final stretching elongation after the soft mattress is deformed is
In the formula, z is the final floating or sinking depth of the bank protection soft raft;
h is the tensile strength of the soft polypropylene knitted cloth in the position width;
x is the range of the scour pit (the middle of the bank protection soft row head is 0);
gamma is the weight of the soft raft and the ballast (D-shaped interlocking block) above the soft raft in unit length;
rho is the water flow density;
v is the water flow velocity;
eta is a dimensionless adjustment parameter.
The method for processing the local deformation settlement optical fiber monitoring data of the end part of the bank protection soft raft is described by combining specific engineering:
the revetment of a certain channel adopts a soft row structure, the ballast above the revetment is a D-shaped interlocking block, the tensile strength of the soft row polypropylene woven cloth in unit width is H26000N/m, the weight of the soft row arrangement and the ballast above the soft row polypropylene woven cloth in unit width (D-shaped interlocking block) and ballast block stones thrown above the soft row arrangement is 10000N, the water flow speed is 0.8m/s, and the water density is 1000kg/m3。
When a large-range scouring pit appears at the end part of the bank protection soft raft body, the scouring deformation form of the bank protection soft raft body under water flow can be obtained by calculation according to a formula (1) and a formula (2):
the specific calculation steps are as follows:
(1) calculating according to the light measured data integral to obtain the actual elongation of the bank protection software row optical fiber;
(2) assuming an initial tuning parameter η ═ η0Calculating the deformation form and the scouring depth of the bank protection software row according to the formula (1) and combining with the field measured data;
(3) calculating to obtain the theoretical elongation of the bank protection soft row according to a formula (2);
(4) comparing the actual elongation with the theoretical elongation of the optical fiber of the bank protection soft row and gradually adjusting the parameter eta1,η2,η3…, determining the final value of the adjustment parameter eta until the actual elongation is equal to the theoretical elongation;
(5) and (3) substituting the determined adjustment parameter eta into a formula (1) to obtain the final form and the scouring depth of the bank protection soft row.
The practical application shows that: the data processing method has higher goodness of fit with the actual situation, and can be used for monitoring the erosion deformation characteristic of the bank protection software row in real time.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (1)
1. A settlement optical fiber monitoring data processing method for local deformation of the end part of a bank protection soft raft body is characterized in that,
the calculation formula of the scouring deformation form of the soft mattress is as follows:
the final stretching elongation after the soft mattress is deformed has the following calculation formula:
in the formula, z is the final floating or sinking depth of the bank protection soft raft;
h is the tensile strength of the soft polypropylene knitted cloth in the position width;
x is the range of the scoured pit, and the middle of the bank protection soft row head is 0;
gamma is the weight of the soft raft and the ballast above the soft raft in unit length, and the ballast above the soft raft is a D-shaped interlocking block;
rho is the water flow density;
v is the water flow velocity;
eta is a dimensionless adjustment parameter;
the data processing steps are as follows:
1) calculating according to the light measured data integral to obtain the actual elongation of the bank protection software row optical fiber;
2) assuming an initial tuning parameter η ═ η0Calculating the deformation form and the scouring depth of the bank protection software row according to the formula (1) and by combining with the field measured data;
3) calculating to obtain the theoretical elongation of the bank protection soft row according to a formula (2);
4) comparing the actual elongation of the shore protection soft row monitoring optical fiber with the theoretical elongation of the shore protection soft row, and gradually adjusting the parameter eta ═ eta1,η2,η3…, until the actual elongation of the shore protection soft row monitoring optical fiber is equal to the theoretical elongation of the shore protection soft row, and determining the final value of the adjustment parameter eta;
5) and substituting the final value of the adjustment parameter eta into a formula (1) to obtain the final form and the scouring depth of the bank protection soft row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413498.4A CN113094632B (en) | 2021-04-16 | 2021-04-16 | Method for processing local deformation settlement optical fiber monitoring data of end part of bank protection soft raft body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413498.4A CN113094632B (en) | 2021-04-16 | 2021-04-16 | Method for processing local deformation settlement optical fiber monitoring data of end part of bank protection soft raft body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113094632A CN113094632A (en) | 2021-07-09 |
| CN113094632B true CN113094632B (en) | 2022-04-01 |
Family
ID=76678245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110413498.4A Active CN113094632B (en) | 2021-04-16 | 2021-04-16 | Method for processing local deformation settlement optical fiber monitoring data of end part of bank protection soft raft body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113094632B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117516400B (en) * | 2023-10-12 | 2024-06-28 | 河海大学 | Strain conversion method for determining deformation of optical fiber sensing monitoring soft mattress based on test |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039309A (en) * | 1998-07-21 | 2000-02-08 | Kazumasa Sasaki | Method and device for deformation inspection |
| JP2007292530A (en) * | 2006-04-24 | 2007-11-08 | Hokuriku Regional Development Bureau Ministry Land Infrastructure & Transport | Fiber-optic scour detection apparatus and system |
| CN103074867A (en) * | 2013-01-28 | 2013-05-01 | 上海市水利工程设计研究院有限公司 | Lap joint method for sudden changing part of scour-preventing bottom-protecting soft mattress |
| CN110440707A (en) * | 2019-08-28 | 2019-11-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of soft raft service state real-time monitoring and evaluation system and method based on distribution type fiber-optic |
| CN111322960A (en) * | 2020-04-09 | 2020-06-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Real-time monitoring system and method for deformation of soft water draining platform for channel improvement |
-
2021
- 2021-04-16 CN CN202110413498.4A patent/CN113094632B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000039309A (en) * | 1998-07-21 | 2000-02-08 | Kazumasa Sasaki | Method and device for deformation inspection |
| JP2007292530A (en) * | 2006-04-24 | 2007-11-08 | Hokuriku Regional Development Bureau Ministry Land Infrastructure & Transport | Fiber-optic scour detection apparatus and system |
| CN103074867A (en) * | 2013-01-28 | 2013-05-01 | 上海市水利工程设计研究院有限公司 | Lap joint method for sudden changing part of scour-preventing bottom-protecting soft mattress |
| CN110440707A (en) * | 2019-08-28 | 2019-11-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of soft raft service state real-time monitoring and evaluation system and method based on distribution type fiber-optic |
| CN111322960A (en) * | 2020-04-09 | 2020-06-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Real-time monitoring system and method for deformation of soft water draining platform for channel improvement |
Non-Patent Citations (3)
| Title |
|---|
| 丁坝工程冲刷与防护措施研究综述;武永新等;《自然灾害学报》;20200215(第01期);全文 * |
| 基于ANSYS的软体排动水沉排受力分析;张益智等;《西北水电》;20131031(第05期);全文 * |
| 局部软弱夹层对挡泥坝稳定性的影响分析;蔡学石等;《水道港口》;20191231;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113094632A (en) | 2021-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113094632B (en) | Method for processing local deformation settlement optical fiber monitoring data of end part of bank protection soft raft body | |
| Houthuys et al. | Storm influences on a tidal sandbank's surface (Middelkerke Bank, southern North Sea) | |
| CN111159805B (en) | Anti-seismic safety analysis method for sluice chamber structure | |
| CN109610487A (en) | A kind of Larsen steel sheet-pile cofferdam and its construction method | |
| CN113094631B (en) | Large-range scouring pit optical fiber monitoring data processing method for end part of bank protection soft row body | |
| CN112836401B (en) | Analysis method for improving safety of mooring system under complex environmental condition | |
| CN111783346B (en) | River ice movement and beach erosion calculation method considering water ice sand coupling effect | |
| CN117272519A (en) | Numerical simulation method for mooring force of wharf boat of inland river pontoon | |
| Heidarnejad et al. | The effect of slots on scouring around piers in different positions of 180-degrees bends | |
| Kuspilić et al. | Monitoring of river channel morphodynamical changes in the zone of bridge piers | |
| Yossef | The effect of groynes on rivers | |
| CN112528539A (en) | Method for determining safety control operation water level of emergency water gate | |
| Hamedi et al. | Sensitivity analysis of earthquake acceleration and drainage efficiency on the stability of weighted concrete dams | |
| Ostrowski et al. | Groins and submerged breakwaters–new modeling and empirical experience | |
| Wajahatullah et al. | 33. Investigating the impact of bridge pier shape and size on scour pattern | |
| CN117874897B (en) | Damming body height prediction method | |
| CN219195804U (en) | Stable protection type hydraulic engineering dykes and dams structure | |
| Baranwal et al. | Bridge Pier Scour Depth Prediction Model-A Review Check for updates | |
| CN218481070U (en) | Measuring device for three-dimensional form of erosion pit with single-pile structure | |
| Mackinnon | Scour from bidirectional current flows around offshore monopoles | |
| Li et al. | Flexible flow deflectors against local scour at bridge piers | |
| Miwa et al. | Dynamic state of river-mouth bar in the Yuragawa River and its control under flood flow conditions | |
| Dong et al. | Artificial Intelligence for Predicting Local Scour Depth around Piers Based on Dimensional Analysis | |
| PANICI et al. | The importance of debris shape in experiments on woody debris accumulations at bridge piers | |
| Fausset | Field and laboratory investigation into scour around breakwaters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |