CN104652397A - Method and system for monitoring foundation trench back silting in deep water - Google Patents
Method and system for monitoring foundation trench back silting in deep water Download PDFInfo
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- CN104652397A CN104652397A CN201510082306.0A CN201510082306A CN104652397A CN 104652397 A CN104652397 A CN 104652397A CN 201510082306 A CN201510082306 A CN 201510082306A CN 104652397 A CN104652397 A CN 104652397A
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- foundation trench
- throwing
- elevation
- mud scum
- described foundation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
Abstract
The invention discloses a method and a system for monitoring foundation trench back silting in deep water, and relates to the field of water depth measurement. The method for monitoring the foundation trench back silting in the deep water comprises the following steps of acquiring the measurement heights between a floating sludge surface and a floating sludge bottom surface after a foundation trench is excavated and before the foundation trench is filled; calculating the foundation trench back silting amount and the thickness of back silting floating sludge according to the difference value between the measurement heights between the floating sludge surface and the floating sludge bottom surface after the foundation trench is excavated and before the foundation trench is filled. According to the method, the back silting situation of a foundation trench area is reflected accurately by measuring the water depths after the foundation trench is excavated and before the foundation trench is filled; compared with a diver measurement method, a density instrument method and a dual-frequency sounding instrument method, the method is low in cost, full in coverage, and can reflect the back silting situation more accurately.
Description
Technical field
The present invention relates to sounding survey field, be specifically related to a kind of deep water foundation ditch back silting monitoring method and system.
Background technology
Foundation ditch back silting has a significant impact immersed tube tunnel tool for mounting, and current unit in charge of construction mainly contains about foundation ditch back silting monitoring method: diver feels method, the Density Measuring Instrument direct method of measurement, high differentiation.Diver feels method and generally adopts diver to slip into seabed to carry out the thickness manual measurement that back-silts; Densimeter method carries out the measurement of density depth section for adopting densometer; High differentiation generally adopts dual frequency sounder to carry out depth survey to after excavation and before throwing.
Diver's sampling method is representative poor, overallly cannot judge situation of back-silting.Densimeter method, operation is inconvenient and cost is higher.High differentiation, dual frequency sounder is that dot type is measured, and cannot form high density fathogram, between twice measurement, compare error is comparatively large, accurately can not reflect the situation of back-silting comprehensively.
Summary of the invention
For defect of the prior art, the invention provides a kind of deep water foundation ditch back silting monitoring method and system, the method accurately can learn the situation of back-silting of deep water foundation trench, for follow-up throwing provides foundation.
First aspect, the invention provides a kind of deep water foundation ditch back silting monitoring method, comprising:
Mud scum surface after obtaining foundation trench excavation and before foundation trench throwing and the measurement elevation of mud scum bottom surface;
The difference of the mud scum surface after excavating according to described foundation trench and before foundation trench throwing and the measurement elevation of mud scum bottom surface, calculates the thickness of deep water foundation ditch back silting amount and the mud scum that back-silts.
Optionally, the elevation on the mud scum surface after obtaining described foundation trench excavation by multibeam echosounder and before described foundation trench throwing.
Optionally, the elevation of the mud scum bottom surface after obtaining described foundation trench excavation by dual frequency sounder and before described foundation trench throwing.
Optionally, the difference of the elevation after the elevation before the described foundation trench throwing obtained according to described multibeam echosounder and described foundation trench excavate obtain described foundation trench excavate after silt amount to described foundation trench throwing.
Optionally, the described difference excavating the measurement elevation of the mud scum surface before rear and foundation trench throwing and mud scum bottom surface according to described foundation trench, calculates the thickness of deep water foundation ditch back silting mud scum, comprising:
Obtain the difference of the elevation before described foundation trench throwing according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described dual frequency sounder, obtain the thickness to foundation ditch back silting amount before described foundation trench throwing and the mud scum that back-silts after described foundation trench excavation.
Second aspect, present invention also offers a kind of deep water foundation ditch back silting monitoring system, comprising:
First acquisition module, excavates the measurement elevation of the mud scum surface before rear and foundation trench throwing and mud scum bottom surface for obtaining foundation trench;
Computing module, for the difference of the measurement elevation according to the mud scum surface after described foundation trench excavation and before foundation trench throwing and mud scum bottom surface, calculates the thickness of deep water foundation ditch back silting amount and the mud scum that back-silts.
Optionally, described first acquisition module, specifically for:
The elevation on the mud scum surface after obtaining described foundation trench excavation by multibeam echosounder and before described foundation trench throwing.
Optionally, described first acquisition module, specifically for:
The elevation of the mud scum bottom surface after obtaining described foundation trench excavation by dual frequency sounder and before described foundation trench throwing.
Optionally, described system also comprises:
Second acquisition module, the difference of the elevation after excavating for the elevation before the described foundation trench throwing that obtains according to described multibeam echosounder and described foundation trench obtain described foundation trench excavate after silt amount to described foundation trench throwing.
Optionally, described computing module, specifically for:
Obtain the difference of the elevation before described foundation trench throwing according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described dual frequency sounder, obtain the thickness to foundation ditch back silting amount before described foundation trench throwing and the mud scum that back-silts after described foundation trench excavation.
As shown from the above technical solution, the present invention proposes a kind of deep water foundation ditch back silting monitoring method and system, the method, by sounding survey before and throwing rear to foundation trench excavation, has reflected the situation of back-silting in foundation trench region accurately; Relative to diver's mensuration, densitometer method, and dual frequency sounder method, cost is little, and all standing, more accurately can reflect the situation of back-silting.
Accompanying drawing explanation
The schematic flow sheet of a kind of deep water foundation ditch back silting monitoring method that Fig. 1 provides for one embodiment of the invention;
A kind of deep water foundation ditch back silting monitoring schematic diagram that Fig. 2 provides for one embodiment of the invention;
The structural representation of a kind of deep water foundation ditch back silting monitoring system that Fig. 3 provides for another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 1 shows the schematic flow sheet of a kind of deep water foundation ditch back silting monitoring method that the present embodiment provides, and as shown in Figure 1, the method comprises:
101, the mud scum surface after obtaining foundation trench excavation and before foundation trench throwing and the measurement elevation of mud scum bottom surface;
The difference of the mud scum surface after 102, excavating according to described foundation trench and before foundation trench throwing and the measurement elevation of mud scum bottom surface, calculates the thickness of deep water foundation ditch back silting amount and the mud scum that back-silts.
The embodiment of the present invention is measured before mainly excavating rear and foundation trench throwing to foundation trench, in concrete engineering project, may interval for some time after foundation trench excavation and before foundation trench throwing, therefore at the silt amount of foundation trench excavation foundation trench afterwards and before foundation trench throwing, likely difference is very large.
Dual frequency sounder in the embodiment of the present invention is low frequency dual frequency sounder, is mainly used for low frequency measurement mud scum bottom surface elevation.All dual frequency sounders in the present invention are low frequency dual frequency sounder, not only to illustrate one by one.
The embodiment of the present invention mainly adopts multibeam echosounder and dual frequency sounder to combine method, multibeam echosounder reflecting interface mud scum elevation of top surface, dual frequency sounder reflecting interface is mud scum bottom surface elevation, multibeam echosounder and dual frequency sounder combination measurement is carried out after foundation trench excavates and before throwing, can know by multibeam echosounder survey data the thing thickness that back-silts by inference, can be known by inference the thickness of mud scum by dual frequency sounder low frequency and the contrast of multibeam echosounder survey data.
A kind of deep water foundation ditch back silting monitoring schematic diagram that Fig. 2 provides for one embodiment of the invention, as shown in Figure 2, comprising: surveying vessel 1, dual frequency sounder 2 and multibeam echosounder 3.
Concrete, the elevation on the mud scum surface after obtaining described foundation trench excavation by multibeam echosounder and before described foundation trench throwing.
The elevation of the mud scum bottom surface after obtaining described foundation trench excavation by dual frequency sounder and before described foundation trench throwing.
Mud scum density is between 1050kg/m3 ~ 1260kg/m3, and the deposit that back-silts is mud scum deposition, and density is greater than 1260kg/m3, and multibeam echosounder reflecting surface is mud scum surface, and dual frequency sounder medium and low frequency reflecting surface is mud scum bottom surface.Hang dual frequency sounder at multi-beam surveying vessel board and carry out synchro measure, synchro measure object contributes to ensureing that dual frequency sounder and multibeam echosounder have identical measurement environment, reduces dual frequency sounder and multibeam echosounder relative error.
Measure after foundation trench excavation, dual frequency sounder low frequency measurement elevation is that (h1 is a series of spot height to h1, for bringing into conveniently, only quote with h1), it is H1 that multibeam echosounder measures elevation, use HYPACK software TIN Model module that multi-beam Bathymetric Data is carried out data extraction according to dual frequency sounder survey line, elevation is H1 ', then after foundation trench excavation, mud scum thickness is:
Hf1＝H1’-h1
Measure before throwing, dual frequency sounder low frequency measurement elevation is h2, and it is H2 that multibeam echosounder measures elevation, uses HYPACK software TIN Model module that multi-beam Bathymetric Data is carried out data extraction according to dual frequency sounder survey line, elevation is H2 ', then before foundation trench throwing, mud scum thickness is:
Hf2＝H2’-h2
The difference of the elevation after excavating according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described foundation trench obtain described foundation trench excavate after silt amount to described foundation trench throwing, after foundation trench excavation to silt amount before foundation trench throwing be:
Hh＝H2-H1
The difference of the elevation before described foundation trench throwing is obtained according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described dual frequency sounder, obtain the thickness to mud scum in silt amount before described foundation trench throwing after described foundation trench excavation, after foundation trench excavation to mud scum thickness in silt amount before foundation trench throwing be:
Hf3＝Hf2＝H2’-h2
Multi-beam Bathymetric Data is carried out data extraction according to dual frequency sounder survey line by above-mentioned use HYPACK software TIN Model module, the embodiment of the present invention, only for illustrating, does not limit the method adopting this module multi-beam Bathymetric Data to be carried out data extraction according to dual frequency sounder survey line.
Said method is by sounding survey before and throwing rear to foundation trench excavation, reflect the situation of back-silting in foundation trench region accurately, and by dual frequency sounder to sounding survey before throwing, mud scum and sedimental situation of back-silting in the thing that back-silts can be reflected, relative to diver's mensuration, densitometer method, and dual frequency sounder method, cost is little, and all standing, more accurately can reflect the situation of back-silting.
Fig. 3 shows the structural representation of a kind of deep water foundation ditch back silting monitoring system that the embodiment of the present invention provides, and as shown in Figure 3, this monitoring system comprises: the first acquisition module 31, computing module 32.
First acquisition module 31, excavates the measurement elevation of the mud scum surface before rear and foundation trench throwing and mud scum bottom surface for obtaining foundation trench;
Computing module 32, for the difference of the measurement elevation according to the mud scum surface after described foundation trench excavation and before foundation trench throwing and mud scum bottom surface, calculates the thickness of deep water foundation ditch back silting mud scum.
In specific implementation process, described first acquisition module 31, specifically for:
The elevation on the mud scum surface after obtaining described foundation trench excavation by multibeam echosounder and before described foundation trench throwing.
Described first acquisition module 31, also specifically for:
The elevation of the mud scum bottom surface after obtaining described foundation trench excavation by dual frequency sounder and before described foundation trench throwing.
Described system also comprises unshowned second acquisition module 33 in Fig. 3:
Second acquisition module 33, the difference of the elevation after excavating for the elevation before the described foundation trench throwing that obtains according to described multibeam echosounder and described foundation trench obtain described foundation trench excavate after silt amount to described foundation trench throwing.
Described computing module 32, specifically for:
Obtain the difference of the elevation before described foundation trench throwing according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described dual frequency sounder, obtain the thickness to mud scum in silt amount before described foundation trench throwing after described foundation trench excavation.
Said method and said system are one to one, and the function that said method limits is applicable to each module role of said system.The present invention is described in detail no longer one by one.
The above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a deep water foundation ditch back silting monitoring method, is characterized in that, comprising:
Mud scum surface after obtaining foundation trench excavation and before foundation trench throwing and the measurement elevation of mud scum bottom surface;
The difference of the mud scum surface after excavating according to described foundation trench and before foundation trench throwing and the measurement elevation of mud scum bottom surface, calculates the thickness of deep water foundation ditch back silting amount and the mud scum that back-silts.
2. method according to claim 1, is characterized in that, the elevation on the mud scum surface after obtaining described foundation trench excavation by multibeam echosounder and before described foundation trench throwing.
3. method according to claim 2, is characterized in that, the elevation of the mud scum bottom surface after obtaining described foundation trench excavation by dual frequency sounder and before described foundation trench throwing.
4. method according to claim 3, is characterized in that, the difference of the elevation after excavating according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described foundation trench obtains described foundation trench and excavates rear silt amount to described foundation trench throwing.
5. method according to claim 4, is characterized in that, the described difference excavating the measurement elevation of the mud scum surface before rear and foundation trench throwing and mud scum bottom surface according to described foundation trench, calculates the thickness of deep water foundation ditch back silting mud scum, comprising:
Obtain the difference of the elevation before described foundation trench throwing according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described dual frequency sounder, obtain the thickness to foundation ditch back silting amount before described foundation trench throwing and the mud scum that back-silts after described foundation trench excavation.
6. a deep water foundation ditch back silting monitoring system, is characterized in that, comprising:
First acquisition module, excavates the measurement elevation of the mud scum surface before rear and foundation trench throwing and mud scum bottom surface for obtaining foundation trench;
Computing module, for the difference of the measurement elevation according to the mud scum surface after described foundation trench excavation and before foundation trench throwing and mud scum bottom surface, calculates the thickness of deep water foundation ditch back silting amount and the mud scum that back-silts.
7. system according to claim 6, is characterized in that, described first acquisition module, specifically for:
The elevation on the mud scum surface after obtaining described foundation trench excavation by multibeam echosounder and before described foundation trench throwing.
8. system according to claim 7, is characterized in that, described first acquisition module, specifically for:
The elevation of the mud scum bottom surface after obtaining described foundation trench excavation by dual frequency sounder and before described foundation trench throwing.
9. system according to claim 8, is characterized in that, described system also comprises:
Second acquisition module, the difference of the elevation after excavating for the elevation before the described foundation trench throwing that obtains according to described multibeam echosounder and described foundation trench obtain described foundation trench excavate after silt amount to described foundation trench throwing.
10. system according to claim 9, is characterized in that, described computing module, specifically for:
Obtain the difference of the elevation before described foundation trench throwing according to the elevation before the described foundation trench throwing that described multibeam echosounder obtains and described dual frequency sounder, obtain the thickness to foundation ditch back silting amount before described foundation trench throwing and the mud scum that back-silts after described foundation trench excavation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510082306.0A CN104652397A (en) | 2015-02-16 | 2015-02-16 | Method and system for monitoring foundation trench back silting in deep water |
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| CN201510082306.0A CN104652397A (en) | 2015-02-16 | 2015-02-16 | Method and system for monitoring foundation trench back silting in deep water |
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| CN201510082306.0A Pending CN104652397A (en) | 2015-02-16 | 2015-02-16 | Method and system for monitoring foundation trench back silting in deep water |
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Cited By (2)
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| CN113237429A (en) * | 2021-05-08 | 2021-08-10 | 交通运输部天津水运工程科学研究所 | Silt deposition thickness measurement calibration device and method |
| CN113237429B (en) * | 2021-05-08 | 2024-05-14 | 交通运输部天津水运工程科学研究所 | Sediment accumulation thickness measurement calibration device and method |
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| CN113237429A (en) * | 2021-05-08 | 2021-08-10 | 交通运输部天津水运工程科学研究所 | Silt deposition thickness measurement calibration device and method |
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Application publication date: 20150527 |