CN105862940A - Pipe bottom pressure monitoring system and method for sand filling of foundation of immersed tube tunnel - Google Patents
Pipe bottom pressure monitoring system and method for sand filling of foundation of immersed tube tunnel Download PDFInfo
- Publication number
- CN105862940A CN105862940A CN201610307255.1A CN201610307255A CN105862940A CN 105862940 A CN105862940 A CN 105862940A CN 201610307255 A CN201610307255 A CN 201610307255A CN 105862940 A CN105862940 A CN 105862940A
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- pressure
- data
- acquisition
- pressure cell
- immersed tube
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The invention provides a pipe bottom pressure monitoring system and method for sand filling of a foundation of an immersed tube tunnel. The system comprises a plurality of pressure boxes, a multi-channel data acquisition instrument and a data processing and analyzing module, wherein the pressure boxes transmit acquired real-time data to the data processing and analyzing module through the multi-channel data acquisition instrument; the pressure boxes are buried at the positions of pipe bottoms and are used for acquiring pressure values of the pipe bottoms according to acquisition frequency set by the data processing and analyzing module; the multi-channel data acquisition instrument is matched with the pressure boxes, and is used for transmitting the real-time pressure data acquired by the pressure boxes to the data processing and analyzing module by a cable or a wireless transmission device; the data processing and analyzing module is used for controlling the acquisition frequency of the pressure boxes, analyzing and processing the received real-time pressure values of the pipe bottoms, and showing sand filling states of various acquisition points. The system can monitor formation of a sand accumulation plate and the change state thereof in real time, and is simple in structure and fast and convenient to use; and a monitoring result is reliable.
Description
Technical field
The present invention relates to immersed tube tunnel technical field, in particular it relates to a kind of immersed tube tunnel basis fills sandpipe bottom pressure prison
Examining system and method.
Background technology
Sand replacement method has become one of main construction method of immersed tube tunnel based process.Implement under water owing to basis fills sand,
The quality on sand basis is directly connected to the construction quality of immersed tube tunnel and builds up the safe operation in rear tunnel, therefore, to immersed tube
Tunnel basis filling sand construction is monitored in real time and is seemed the most necessary.
At present, immersed tube tunnel basis fills the monitoring of sand construction, conventional following several method:
(1) sand amount controls
According to the filling sand amount of pipeline section Bottom Altitude estimation pipeline section after the foundation trench degree of depth and sinking.Due to the impact of current, a part
Sand can be taken away by current, and this part sand amount is difficult to estimation；Additionally, the control that the diversity of foundation trench shape is to sand amount
Also considerable influence can be produced.Therefore control sand filling effect unreliable to fill sand amount as standard.
(2) outlet pressure monitoring
Sand pump outlet pressure is monitored, when force value exceedes a certain limit value (such as 0.1MPa) during filling sand, it is believed that
Pipeline section is in critical rises state.Owing to sand pump outlet pressure is limited near filling sand hole, and sand is amassed whether dish contacts
Bottom pipeline section, this index can not provide reasonably judgement.
(3) displacement measurement
In pipe, measure the change of pipeline section absolute altitude, think that when pipeline section reaches certain amount of rising filling sand circularity reaches requirement.
Owing to sand is in space and non-uniform Distribution, the change of pipeline section absolute altitude cannot reflect emery disc between foundation trench and pipeline section bottom surface all sidedly
Full level.
(4) diving is felt
By water under diver feel emery disc formed and around sand hole fill sand situation.Obviously, diver feels scope only office
It is limited to pipeline section surrounding, helpless for the position in the middle of pipeline section.
Due to the limitation of said method, it is faced with in filling sand construction and cannot monitor sand in real time and amass formation and the change thereof of dish
State, thus be easily caused filling sand hole plug-hole and basis not sufficiently filled, it is impossible to for stop fill sand provide accordingly judge mark
Problems such as accurate (foundations).
Summary of the invention
For defect of the prior art, it is an object of the invention to provide a kind of immersed tube tunnel basis and fill sandpipe bottom pressure prison
Examining system and method.
The immersed tube tunnel basis provided according to the present invention fills sandpipe bottom pressure monitoring system, including several pressure cells, manifold
Track data Acquisition Instrument, data process&analysis module, the real time data of collection is adopted by described pressure cell by multi-channel data
Collection instrument transmits to data process&analysis module；
Described pressure cell is embedded in position at the bottom of pipe, for the frequency acquisition collection tube according to data process&analysis module settings
The force value at the end；
Described multi-Channels Data Acquisition matches with pressure cell, and the real-time pressure data being used for gathering pressure cell is with cable
Or radio transmitting device transmits to data process&analysis module；
Described data process&analysis module, for controlling the frequency acquisition of pressure cell, and presses in real time at the bottom of the pipe received
Force value is analyzed processing, and represents the filling sand state of each collection point.
Preferably, described pressure cell uses soil pressure cell, specifically, uses type vibration wire soil pressure cell.
Preferably, described multi-Channels Data Acquisition is type vibration wire data collecting instrument, and described type vibration wire data collecting instrument can
Carry out data acquisition according to the frequency acquisition set, and be provided with data storage areas.
Preferably, described data process&analysis module can control the acquisition mode of pressure cell, acquisition time interval, and
Monitor the filling sand state of each collection point in real time.
Preferably, described data process&analysis module includes: the control dress on computer, single-chip microcomputer and smart machine
Any one device in putting.
Fill sandpipe bottom pressure monitoring method according to the immersed tube tunnel basis that the present invention provides, comprise the steps:
Pipe bottom pressure acquisition step: by pressure cell according to the force value at the bottom of the frequency acquisition collection tube set；
Data transmission step: the official's base pressure force value gathered by pressure cell passes through multi-Channels Data Acquisition with cable or wireless biography
Defeated device transmits to data process&analysis module；
Data processing step: control the frequency acquisition of pressure cell, and real-time pressure value at the bottom of the pipe received is analyzed place
Reason, represents the filling sand state of each collection point.
Compared with prior art, the present invention has a following beneficial effect:
1, the present invention is concentric radial equidistantly to bury pressure cell, preset data underground according to filling sand hole position at tube coupling base plate
Frequency acquisition, is gathered data by multi-Channels Data Acquisition and is sent to computer, soft with analysis by Correlation method for data processing
Part is monitored in real time and represents pipe bottom pressure situation of change in filling sand work progress, and then determines that sand amasss dish disperse state, for base
Plinth fills the enforcement of sand construction and provides scientific basis.
2, comparing traditional monitoring method, the present invention can monitor sand in real time and amass formation and the variable condition thereof of dish, and knot
Structure is simple, and easy to use, monitoring result is relatively reliable.
Accompanying drawing explanation
By the detailed description non-limiting example made with reference to the following drawings of reading, the further feature of the present invention,
Purpose and advantage will become more apparent upon:
Fig. 1 is the system architecture diagram of the present invention；
Fig. 2 is that the present invention fills sand hole and pressure cell horizontal layout schematic diagram；
Fig. 3 is pressure cell pre-buried structure schematic cross-sectional view in the present invention；
Fig. 4 is the filling sand pressure monitoring procedure chart of the embodiment of the present invention；
Fig. 5 be the embodiment of the present invention pass through observation window observation compare figure with pressure cell monitoring result.
In figure:
21-fills sand hole；
22-pressure cell；
33-base plate；
34-sleeve pipe；
35-cable.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in those skilled in the art
Member is further appreciated by the present invention, but limits the present invention the most in any form.It should be pointed out that, the common skill to this area
For art personnel, without departing from the inventive concept of the premise, it is also possible to make some changes and improvements.These broadly fall into
Protection scope of the present invention.
The immersed tube tunnel basis provided according to the present invention fills sandpipe bottom pressure monitoring system, is embedded in the pressure cell at the bottom of pipe, many
Channel data Acquisition Instrument, computer and corresponding data process&analysis software.
Described pressure cell is to be embedded in the high accuracy soil pressure cell bottom pipeline section；
Described multi-Channels Data Acquisition is the device supporting with soil pressure cell, is connected with pressure cell by cable, and passes through
The data of collection are sent to computer by cable or radio transmitting device；
Described computer is each soil pressure cell setting data frequency acquisition by data acquisition software, and to gathered data
Monitor in real time；
Described data process&analysis software data gathered to each pressure cell are analyzed in real time, show the filling of each sampling site
Sand state.
Described pressure cell uses high accuracy soil pressure cell, usually type vibration wire soil pressure cell, is a kind of embedded type pressure sensing
Device, its range is typically smaller than 0.2MPa, and resolution is higher than 0.1% (F S).
Described multi-Channels Data Acquisition is type vibration wire data collecting instrument, and Acquisition Instrument can be gathered automatically by predetermined frequency acquisition,
And there is storage function.
Described computer controls data acquisition modes by soil pressure cell software kit, acquisition time is spaced and monitoring data shape
Condition.
Described data process&analysis software has monitoring and the examination function of data, and by the pressure of each sampling site to filling
Sand situation makes judge.
Described pressure cell is concentric radial equidistantly bury underground according to filling sand hole position at tube coupling base plate, and its spacing can be according to amount
Survey precision and combine practical situation and determine (generally can set the spacing of 1～2m)；Each pressure cell passes through cable and multichannel
Data collecting instrument connects, and applies the acquisition software preset data frequency acquisition supporting with pressure cell；Multi-Channels Data Acquisition
Collection data are sent to computer by cable or wireless transmission method, utilize the Correlation method for data processing in computer and divide
Analysis software reflects pipe bottom pressure situation of change in filling sand work progress in real time；Determine that sand amasss dish and extends by filling sand mo(u)ld draft experiment
Pressure door threshold value, and then represent in real time at the bottom of pipe fill sand process, determine that sand amasss dish disperse state, for fill sand construction reality
Offer theoretical foundation is provided.
Specifically, as it is shown in figure 1, immersed tube tunnel basis fills sandpipe bottom pressure monitoring system by several pressure cells, manifold
Track data Acquisition Instrument and computer and data analysis software form.
As in figure 2 it is shown, centered by filling sand hole 21, pressure cell 22 is embedded in pipe symmetrically by the most radial
Bottom Duan.
As it is shown on figure 3, pressure cell 22 is fixed on pattern board 33, its cable 35 is protected by sleeve pipe 34 and is made to prevent
Water processes.
The specific embodiment of technical solution of the present invention:
The observed result of model test is filled as embodiments of the invention by large-scale immersed tube tunnel equal proportion basis.Certain is big
Type immersed tube tunnel equal proportion basis fills model test platform and includes: a size of 52m × 30m × 2m large pool, and
Bottom and all round closure and upper opening, a size of 25m × 23.5m × 0.3m have 4 armored concrete knots filling sand hole
Structure model.This pattern board along each filling sand hole radially 45 ° radial equidistantly bury pressure cell in concentric underground (pressure cell be
Type vibration wire soil pressure cell, its range is 0.2MPa, resolution 0.1% (F S)), pressure cell divides with filling sand hole centre distance
Not Wei 2m, 4m, 6m and 8m, fill the change of Bottom Pressure during sand with monitoring.At pattern board along each filling sand hole
Radially 90 ° arrange high-strength organic glass observation window (0.6m × 0.25m) at equal intervals, are full of journey with emery disc during observing filling sand
Degree and extension radius etc..Implement to fill sand operation by design emery disc dilation angle 7.5m.During filling sand, pressure cell is pressed
Bottom Pressure is monitored by the sample frequency being spaced 15 minutes.
Fig. 4 is respectively 2m, 4m, 6m and 8m at Bottom Pressure with filling sand time away from filling the sand hole hole heart for filling during sand
Variation relation figure.Fig. 4 presents similar change away from the Bottom Pressure filling sand hole hole heart different distance during showing to fill sand
Rule, is undaform fluctuating with the lasting Bottom Pressure filling the sand time and is gradually increased, the fluctuating situation of Bottom Pressure and sand
Long-pending dish is formed corresponding with dissipation situation.Away from fill sand hole near pressure change frequently and pressure the most greatly, distance filling sand hole relatively
Pressure at a distance is insensitive in filling sand early stage, the most progressively makes a difference.
Fig. 5 be the emery disc dilation angle observed by observation window with away from filling sand hole hole heart different distance pressure cell monitoring result pair
According to figure.By to observation data analysis combine Fig. 5 can shake out long-pending dish extension pressure door threshold value be 9.56kPa.Based on
This pressure door threshold value can follow the tracks of the process filling sand at the bottom of pipe, grasps sand and amasss dish disperse state.
The present invention uses the method that pre-buried pressure cell monitoring immersed tube tunnel basis fills sand construction, can not only monitor residing region
Pressure, and can reflect that sand amasss the formation of dish and dissipation situation, there is convenience and practical.
One skilled in the art will appreciate that except with pure computer readable program code mode realize the present invention provide system and
Beyond its each device, completely can by method step is carried out system that programming in logic makes the present invention provide and
Each device is with gate, switch, special IC, programmable logic controller (PLC) and embedded microcontroller etc.
Form realizes identical function.So, system and every device thereof that the present invention provides are considered a kind of Hardware Subdivision
Part, and the structure in hardware component can also be considered as to include in it for the device realizing various function；Can also be by
Device for realizing various function is considered as not only being the software module of implementation method but also can be the knot in hardware component
Structure.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in
Stating particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or revise,
This has no effect on the flesh and blood of the present invention.In the case of not conflicting, in embodiments herein and embodiment
Feature can arbitrarily be mutually combined.
Claims (6)
1. an immersed tube tunnel basis fills sandpipe bottom pressure monitoring system, it is characterised in that include several pressure cells, many
Channel data Acquisition Instrument, data process&analysis module, the real time data of collection is passed through multi-channel data by described pressure cell
Acquisition Instrument transmits to data process&analysis module；
Described pressure cell is embedded in position at the bottom of pipe, for the frequency acquisition collection tube according to data process&analysis module settings
The force value at the end；
Described multi-Channels Data Acquisition matches with pressure cell, and the real-time pressure data being used for gathering pressure cell is with cable
Or radio transmitting device transmits to data process&analysis module；
Described data process&analysis module, for controlling the frequency acquisition of pressure cell, and presses in real time at the bottom of the pipe received
Force value is analyzed processing, and represents the filling sand state of each collection point.
Immersed tube tunnel basis the most according to claim 1 fills sandpipe bottom pressure monitoring system, it is characterised in that described
Pressure cell uses soil pressure cell, specifically, uses type vibration wire soil pressure cell.
Immersed tube tunnel basis the most according to claim 1 fills sandpipe bottom pressure monitoring system, it is characterised in that described
Multi-Channels Data Acquisition is type vibration wire data collecting instrument, and described type vibration wire data collecting instrument can be according to the collection frequency set
Rate carries out data acquisition, and is provided with data storage areas.
Immersed tube tunnel basis the most according to claim 1 fills sandpipe bottom pressure monitoring system, it is characterised in that described
Data process&analysis module can control the acquisition mode of pressure cell, acquisition time interval, and monitors each collection point in real time
Filling sand state.
Immersed tube tunnel basis the most according to claim 1 fills sandpipe bottom pressure monitoring system, it is characterised in that described
Data process&analysis module includes: any one device controlled in device on computer, single-chip microcomputer and smart machine.
6. an immersed tube tunnel basis fills sandpipe bottom pressure monitoring method, it is characterised in that comprise the steps:
Pipe bottom pressure acquisition step: by pressure cell according to the force value at the bottom of the frequency acquisition collection tube set；
Data transmission step: the official's base pressure force value gathered by pressure cell passes through multi-Channels Data Acquisition with cable or wireless biography
Defeated device transmits to data process&analysis module；
Data processing step: control the frequency acquisition of pressure cell, and real-time pressure value at the bottom of the pipe received is analyzed place
Reason, represents the filling sand state of each collection point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307255.1A CN105862940B (en) | 2016-05-10 | 2016-05-10 | Immersed tube tunnel basis fills sandpipe bottom pressure and monitors system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307255.1A CN105862940B (en) | 2016-05-10 | 2016-05-10 | Immersed tube tunnel basis fills sandpipe bottom pressure and monitors system and method |
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| Publication Number | Publication Date |
|---|---|
| CN105862940A true CN105862940A (en) | 2016-08-17 |
| CN105862940B CN105862940B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610307255.1A Active CN105862940B (en) | 2016-05-10 | 2016-05-10 | Immersed tube tunnel basis fills sandpipe bottom pressure and monitors system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705902A (en) * | 2016-11-17 | 2017-05-24 | 太原理工大学 | System and method for monitoring stability of filling strip |
| CN111811945A (en) * | 2020-06-30 | 2020-10-23 | 中铁二院工程集团有限责任公司 | Prestressed anchor cable installation test system and method |
| CN117090207A (en) * | 2023-10-19 | 2023-11-21 | 中铁第六勘察设计院集团有限公司 | Sand filling treatment device for immersed tunnel foundation and construction method |
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| CN1399042A (en) * | 2002-08-27 | 2003-02-26 | 上海隧道工程股份有限公司 | Tunnel pipe section floating conveying, sinking and joining construction process |
| JP3570916B2 (en) * | 1999-04-12 | 2004-09-29 | 西武ポリマ化成株式会社 | Joint structure for caisson, its construction method and joint material for caisson |
| CN202718148U (en) * | 2012-06-06 | 2013-02-06 | 上海交通大学 | Nondestructive effect testing device for grouting foundation of immersed tube tunnel |
| CN103075195A (en) * | 2012-12-28 | 2013-05-01 | 西北大学 | Measurement system and method for stress of surrounding rock of hipparion red soil tunnel under influence of crack water |
| CN205857254U (en) * | 2016-05-10 | 2017-01-04 | 上海交通大学 | Immersed tube tunnel basis fills sandpipe bottom pressure monitoring system |
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Patent Citations (5)
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| JP3570916B2 (en) * | 1999-04-12 | 2004-09-29 | 西武ポリマ化成株式会社 | Joint structure for caisson, its construction method and joint material for caisson |
| CN1399042A (en) * | 2002-08-27 | 2003-02-26 | 上海隧道工程股份有限公司 | Tunnel pipe section floating conveying, sinking and joining construction process |
| CN202718148U (en) * | 2012-06-06 | 2013-02-06 | 上海交通大学 | Nondestructive effect testing device for grouting foundation of immersed tube tunnel |
| CN103075195A (en) * | 2012-12-28 | 2013-05-01 | 西北大学 | Measurement system and method for stress of surrounding rock of hipparion red soil tunnel under influence of crack water |
| CN205857254U (en) * | 2016-05-10 | 2017-01-04 | 上海交通大学 | Immersed tube tunnel basis fills sandpipe bottom pressure monitoring system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705902A (en) * | 2016-11-17 | 2017-05-24 | 太原理工大学 | System and method for monitoring stability of filling strip |
| CN111811945A (en) * | 2020-06-30 | 2020-10-23 | 中铁二院工程集团有限责任公司 | Prestressed anchor cable installation test system and method |
| CN117090207A (en) * | 2023-10-19 | 2023-11-21 | 中铁第六勘察设计院集团有限公司 | Sand filling treatment device for immersed tunnel foundation and construction method |
| CN117090207B (en) * | 2023-10-19 | 2023-12-26 | 中铁第六勘察设计院集团有限公司 | Sand filling treatment device for immersed tunnel foundation and construction method |
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| Publication number | Publication date |
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| CN105862940B (en) | 2018-10-23 |
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