CN105862939B - Immersed tube tunnel basis fills sand equal proportion model test platform - Google Patents
Immersed tube tunnel basis fills sand equal proportion model test platform Download PDFInfo
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- CN105862939B CN105862939B CN201610307204.9A CN201610307204A CN105862939B CN 105862939 B CN105862939 B CN 105862939B CN 201610307204 A CN201610307204 A CN 201610307204A CN 105862939 B CN105862939 B CN 105862939B
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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
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Abstract
The present invention provides a kind of immersed tube tunnel bases to fill sand equal proportion model test platform, including experimental tank, wherein the experimental tank is divided by partition wall (14) fills sand test area (12) and modelling area (15), the periphery of the experimental tank is side slope (11), the opening area for testing pond is greater than the base area in experiment pond, and the bottom surface of the experimental tank is also laid with concrete bed course of being always or usually as specified.The present invention can not only study single hole and fill sand, fill the influence of sand construction order and its relevance to sand filling effect, but also can study the influence for filling sand hole position to sand filling effect；More with operating condition of test, monitoring sand filling effect is intuitive, effective, the reusable advantage of model.The present invention is to examine immersed tube tunnel basis to fill sand construction technology, determine the monitoring method filled in sand work progress and the important tool for working out sand filling effect evaluation criterion.
Description
Technical field
The present invention relates to immersed tube tunnel technical fields, and in particular, to a kind of immersed tube tunnel basis filling sand equal proportion model
Test platform.
Background technique
Immersed tube tunnel has become because of its unique process characteristic and biggish more river superiority across rivers (or over strait)
The important selection pattern in tunnel.Sand replacement method is also referred to as sand flow method or pressure sand method, is the main construction method of immersed tube tunnel based process
One of.It is highly important link in immersed tube tunnel construction that basis, which fills sand, and the quality on sand basis is directly related to entire immersed tube tunnel
The construction quality and safety in road.
Though filling the factor of chiltern amount very due to influencing basis currently, successfully having built many immersed tube tunnels both at home and abroad
It is more, easily occur various problems in construction, there is the precedent for leading to major accident because of pipeline section underlying issue both at home and abroad.It is true
It is reliable to protect construction safety, usually carries out filling model test research before formal construction, sand construction technology is filled with detection, simulation fills
Sand process drafts filling sand monitoring method and sand filling effect evaluation criterion.
1975, Holland carried out for the first time in the tunnel Fu Lake (the Vlake Tunnel) for passing through the river West Xie Erde
It fills model test and sand replacement method is applied to the engineering.At home, Guangzhou Zhujiang immersed tube tunnel, Shanghai Outer Ring Line immersed tube tunnel,
Guangzhou logical sequence head-Biological Island-university city tunnel, Guangzhou Zhou Touzui immersed tube tunnel, Foshan immersed tube tunnel, the Nanchang tunnel Hong Gu and port pearl
Filling model test is carried out using the immersed tube tunnel for filling sand basis and has been ground in Australia's bridge immersed tube tunnel middle section pipeline section basis etc.
Study carefully.
Lack unified test code due to filling model test, ongoing immersed tube tunnel fills sand basic model in China
The filling sand hole quantity and test simulation operating condition that generally existing model dimension is too small in test, pattern difference is big, model is laid are on the low side
The problems such as, the construction parameter and boundary condition in engineering are not fully considered in test, research achievement lacks generality.And large scale
Equal proportion, which fills model test, can effectively make up above-mentioned deficiency, improve the practicability and reliability of test result, and can be more preferable
Immersed tube tunnel is instructed to fill sand basic engineering and construction in ground.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of immersed tube tunnel bases to fill sand equal proportion model
Test platform.
The immersed tube tunnel basis provided according to the present invention fills sand equal proportion model test platform, including experimental tank, wherein
The experimental tank is divided by partition wall fills sand test area and test model, and the periphery of the experimental tank is side slope, that is, is tested
The opening area in pond is greater than the base area in experiment pond, and the bottom surface of the experimental tank is also laid with concrete bed course of being always or usually as specified.
Preferably, the partition wall is located at the medium position of experimental tank, depth the eating according to model transportation by driving of experimental tank
Water depth and filling sand thickness determine.
Preferably, the buttress of multiple reinforced concrete structures is provided on the bottom surface for filling sand test area.
Preferably, the test model includes: the side wall of bottom plate and floor peripheral, is provided in the bottom plate, side wall
Arrangement of reinforcement；And multiple filling sand holes are additionally provided on the bottom plate.
Preferably, the corner location that the side wall of the test model is constituted is provided with pull ring, and the test model
It is provided with barricade on the outside of quadrangle and measures the gage of water level.
Preferably, height of the buttress more than experimental tank bottom surface is that practical immersed tube tunnel basis fills pipeline section in sand
At a distance from foundation trench bottom cushion.
Preferably, the bottom plate is equipped with 4 filling sand holes, and 4 filling sand holes are in two rows of distributions, each filling sand hole spacing and reality
The spacing that sand hole is filled in the environment of border is identical, and wherein the distance between two filling sand holes in first row indicate practical immersed tube tunnel base
Plinth fills the distance of tube section ends in sand, two distances for filling sand holes of secondary series indicate that practical immersed tube tunnel basis fills longitudinal edge in sand
Length, the corresponding practical immersed tube tunnel basis in the position of second row first filling sand hole fills the filling sand in sand in medium position
Hole.
Preferably, monitoring line is spread along radial 45 ° of each filling sand hole radial emery discs that are equipped on the bottom plate of test model,
The bottom base plate of monitoring line buries multiple observation windows.
Preferably, the monitoring system is for monitoring hydraulic pressure, including first pressure box, second pressure box, the number to match
According to acquisition equipment and corresponding control module, the first pressure box is mounted under the corresponding bottom plate of emery disc diffusion monitoring line,
And equidistantly distributed between multiple first pressure boxes；The second pressure box is fixed on the steel plate of test model bottom plate lower end surface
On, the cable of second pressure box is pierced by from plate top surface, and the cable is coated with corresponding casing.
The observation window is the organic glass structure of strip.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, immersed tube tunnel basis filling sand equal proportion model test platform provided by the invention is bigger compared to the conventional sand mo(u)ld type that fills,
The filling sand hole being arranged on model is more, can investigate a variety of filling sand operating conditions, the floating and sinking of model are considered in design,
It is more close with practical filling sand Construction Condition.
2, immersed tube tunnel basis provided by the invention fill sand equal proportion model test platform can not only study single hole fill sand,
The influence of sand construction order and its relevance to sand filling effect is filled, but also can study and fill sand hole position to the shadow of sand filling effect
It rings；More with operating condition of test, monitoring sand filling effect is intuitive, effective, the reusable advantage of model.
3, immersed tube tunnel basis provided by the invention fills sand equal proportion model test platform as the filling of immersed tube tunnel pipeline section basis
Sand construction provides technical controlling index, is that immersed tube tunnel basis is examined to fill sand construction technology, determine the prison filled in sand work progress
Survey method and the important tool for working out sand filling effect evaluation criterion.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is experimental tank planar structure arrangement schematic diagram in the present invention；
Fig. 2 is the cross-sectional view of the structure of test model of the present invention；
Fig. 3 is the floor plan that sand hole, observation window and pressure cell are filled in test model of the present invention；
Fig. 4 is observation window pre-buried steel structure transverse face schematic diagram in test model of the present invention；
Fig. 5 is pressure cell pre-buried structure schematic cross-sectional view in test model of the present invention.
In figure:
11- side slope 12- fills sand test area 13- buttress
14- partition wall 15- test model
21- side wall 22- bottom plate 23- arrangement of reinforcement
24- pull ring 25- barricade 26- gage
31- fills sand hole 32- observation window 33- first pressure box
The high-strength organic glass of 41- lateral stiffening plate 42- sealing rubber pad 43-
44- rubber pad 45- keeper plate of steel 46- plug welding bolt
51- second pressure box 52- steel plate
54- casing 55- cable
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
The immersed tube tunnel basis provided according to the present invention fills sand equal proportion model test platform, including experimental tank, test
Model and the monitoring system of laying.The experimental tank takes slope to excavate；Pond depth by model transportation by driving draft and
Sand thickness is filled to determine；Partition wall is set in the middle part of pond；Tank floor is equipped with one layer of blotter and a laminin concrete bed course；
The test model is the reinforced concrete structure of bottom and all round closure and upper opening, including bottom plate, bottom plate
The side wall and its pull ring on corner on periphery, model quadrangle outside are arranged water level gage, set in the pattern board and its side wall
There is arrangement of reinforcement；
The bottom plate is equipped with 4 filling sand holes, and 4 filling sand holes are laid in two rows of, and spacing is identical as the practical sand hole spacing that fills,
And it is corresponding with tube section ends, longitudinal edge and middle part filling sand hole respectively；
Monitoring line is spread along radial 45 ° of each filling sand hole radial emery discs that are equipped on the bottom plate, at the bottom of monitoring line
Board bottom portion buries the high-strength organic glass observation window of multiple strips, is equidistantly spaced near bottom base plate observation window with filling sand hole
Lay water pressure measuring device；
Multiple buttresses are set on the bottom surface of the experimental tank and along the test model bottom board symmetry.
Pond is divided into test model by middle part partition wall and fills sand test area two parts, and float meter is done in test model bottom,
Several buttresses are set in trial zone tank floor.
The buttress is armored concrete, height of the buttress in tank floor be pipeline section and foundation trench bottom cushion away from
From.
The distance between the pattern board bottom surface and experimental tank bottom surface be equal to pipeline section and foundation trench bottom cushion away from
From.
The sand product disk diffusion observation window is made of pre-buried steel construction and high-strength organic glass.
The water pressure measuring device is made of soil pressure cell and its matched data acquisition equipment and corresponding control software.
Pull ring on the model corner is arranged on the exterior wall of model corner, and intensity should be greater than that model is made to implement to float
Drawing force and brake force.
The water level gage being arranged on the outside of the model quadrangle, measuring range should be greater than the water level of transportation by driving and fill sand test
The difference of water level, accuracy in measurement are grade.
The experimental tank takes slope to excavate, and slope ratio is 1: 2, the early strong concrete of injection, and hangs steel mesh；Pond depth presses mould
The draft and filling sand thickness of type transportation by driving determine；Partition wall is set in the middle part of pond, pond is divided into test model and fills sand examination
Area is tested, partition wall width is 0.5m, is highly greater than filling sand thickness 0.2m, to prevent emery disc from diffusing to test model；Tank floor is set
There are one layer of blotter and a laminin concrete bed course, wherein the pond basis of test model observation window corresponding position uses thin sand
Processing, so as to model floating；Multiple armored concrete are set corresponding to the bottom board symmetry of test model on basin test area bottom surface
Structure buttress, height of the buttress in tank floor are pipeline section at a distance from foundation trench bottom cushion.
The test model is the reinforced concrete structure of bottom and all round closure and upper opening, including bottom plate, bottom plate
Arrangement of reinforcement is equipped in the side wall and its pull ring on corner on periphery, bottom plate and side wall；Bottom plate is equipped with 4 filling sand holes, 4 filling sand
Hole is in two rows of layings, and spacing is identical as practical filling sand hole spacing, and opposite with tube section ends, longitudinal edge and middle part filling sand hole respectively
It answers；Monitoring line is spread along radial 45 ° of each filling sand hole radial emery discs that are equipped on bottom plate, the bottom base plate on monitoring line is buried
If multiple high-strength organic glass observation windows of strip, equidistantly it is spaced near bottom base plate observation window with filling sand hole and lays hydraulic pressure
Force measuring device fills the diffusion-condition of emery disc during sand with monitoring；Water level gage is set on the outside of model quadrangle, with monitoring model
Water level when transportation by driving and filling sand test.
Immersed tube tunnel basis designed by the present invention fills sand equal proportion model test platform and its monitoring system, the filling sand mo(u)ld
Type test platform is bigger compared to conventional filling sand mo(u)ld type, and the filling sand hole being arranged on model is more, can investigate a variety of filling sand works
Condition considers the floating and sinking of model in design, and practical to fill sand Construction Condition more close.The ratio such as sand is filled by the basis
The test that example model test platform and its monitoring system are carried out can not only study single hole and fill sand, fill sand construction order and its pass
Influence of the connection property to sand filling effect, but also the influence for filling sand hole position to sand filling effect can be studied；It is more with operating condition of test,
Monitor the features such as sand filling effect is intuitive, effective, and model is reusable.The test platform and its monitoring system can be immersed tube tunnel
Pipeline section basis fills sand construction offer technical controlling index, is to examine immersed tube tunnel basis to fill sand construction technology, determine that filling sand constructs
The important tool of monitoring method and formulation sand filling effect evaluation criterion in the process.
Specifically, as shown in Figure 1, experimental tank is made of side slope 11, filling sand test area 12 and test model 15, in pond
Partition wall 14 is arranged in portion, and multiple reinforced concrete structure buttresses 13 are arranged on trial zone bottom surface, sets that there are four fill in test model 15
Sand hole.
As shown in Fig. 2, test model is the structure of armored concrete and all round closure, it includes bottom plate 22, bottom plate surrounding
Side wall 21 and its corner on pull ring 24, be equipped with arrangement of reinforcement 23 in the bottom plate and side wall of model；Four filling sand holes on bottom plate are in
Two rows are laid.
As shown in figure 3, emery disc diffusion monitoring line is set up along each filling sand hole 31 on pattern board, at the bottom plate bottom of monitoring line
Portion buries the high-strength organic glass observation window 32 of strip, and bottom and filling sand hole are equidistantly spaced the first pressure of laying near observation window
Power box 33.
As shown in figure 4, observation window edge uses lateral stiffening plate 41, after the completion of casting and compacting of concrete, pass through sealing rubber pad
42, keeper plate of steel 45, rubber pad 44 and plug welding bolt 46 install high-strength organic glass 43, and make hermetic seal processing.
As shown in figure 5, second pressure box 51 is fixed on bottom plate 22, cable 55 is protected and is made at waterproof by casing 54
Reason.
Experiment process and test procedure: excavation pond first is as model test platform, then the production test mould in pond
Type；After the completion of modelling, pond is poured water so that model floats, and is floated to by the pull ring Controlling model on model and fill sand examination
Test area.Water level in water pool is set by the water level gage on model, so that model is sunk and is located at armored concrete set in advance
On buttress, rope fixed model is passed through by the pull ring and the anchor that is preset at outside pond of model quadrangle.Then, the water of setting is kept
Pool water level (anti-floating coefficient is 1.05) carries out filling sand by scheduled different operating conditions to different filling sand holes.During filling sand, lead to
It crosses pre-buried observation window and pressure cell to be respectively monitored sand product disk spread condition, while non-destructive testing technology pair can also be passed through
Sand process is filled to be monitored and carry out evaluation analysis to sand filling effect.After the completion of filling sand, lowers water level and model is located completely
On sand basis, carry out the measurement of correlation such as settling.Finally, water level raising, so that model floats and drags model to making area, pond
Apparent, geometrical characteristic and filling sand hole zap pit etc. are carried out to sand product disk after draining to measure, and sand product disk is taken by predetermined position
Sample detects its relative compaction.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (6)
1. a kind of immersed tube tunnel basis fills sand equal proportion model test platform, which is characterized in that including experimental tank, monitoring system
System, wherein the experimental tank is divided by partition wall (14) fills sand test area (12) and test model (15), the experimental tank
Periphery be side slope (11), i.e. the opening area in experiment pond is greater than the base area in experiment pond, and the experimental tank
Bottom surface is also laid with concrete bed course of being always or usually as specified；Wherein:
The test model (15) includes: the side wall (21) of bottom plate (22) and floor peripheral, and the bottom plate (22), side wall (21) are interior
It is provided with arrangement of reinforcement (23)；The bottom plate (22) is equipped with 4 filling sand holes (31), and 4 filling sand holes (31) are in two rows of distributions, each
Fill sand hole (31) spacing in actual environment fill the spacing of sand hole it is identical, wherein in first row two fillings sand hole (31) between away from
From laterally filled for practical pipeline section the spacing of sand hole, secondary series two fill with a distance from sand hole (31) as the longitudinal filling sand hole of practical pipeline section
Spacing, the second row first corresponding practical immersed tube tunnel basis in position for filling sand hole (31) fill the filling sand that medium position is in sand
Hole；Monitoring line is spread along radial 45 ° of each filling sand hole (31) the radial emery discs that are equipped on the bottom plate (22) of test model (15),
The bottom base plate of monitoring line buries multiple observation windows (32)；The monitoring system is for monitoring hydraulic pressure, including first pressure box
(33), second pressure box (51), the data acquisition equipment that matches and corresponding control module, the first pressure box (33)
It is mounted under the corresponding bottom plate (22) of emery disc diffusion monitoring line, and equidistantly distributed between multiple first pressure boxes (33)；It is described
Second pressure box (51) is fixed on the steel plate (52) of test model (15) bottom plate (22) lower end surface, the line of second pressure box (51)
Cable (55) is pierced by from bottom plate (22) top surface, and the cable (55) is coated with corresponding casing (54).
2. immersed tube tunnel basis according to claim 1 fills sand equal proportion model test platform, which is characterized in that it is described every
Wall (14) is located at the medium position of experimental tank, and the depth of experimental tank is true according to the draft and filling sand thickness of model transportation by driving
It is fixed.
3. immersed tube tunnel basis according to claim 1 fills sand equal proportion model test platform, which is characterized in that the filling
The buttress (13) of multiple reinforced concrete structures is provided on the bottom surface in sand test area (12).
4. immersed tube tunnel basis according to claim 1 fills sand equal proportion model test platform, which is characterized in that the examination
It tests the corner location that the side walls (21) of model (15) is constituted to be provided with pull ring (24), and outside the quadrangle of the test model (15)
Side is provided with barricade (25) and measures the gage (26) of water level.
5. immersed tube tunnel basis according to claim 3 fills sand equal proportion model test platform, which is characterized in that the branch
Height of the pier (13) more than experimental tank bottom surface is that practical immersed tube tunnel basis fills pipeline section and foundation trench bottom cushion in sand
Distance.
6. immersed tube tunnel basis according to claim 1 fills sand equal proportion model test platform, which is characterized in that the sight
Examine the organic glass structure that window (32) are strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307204.9A CN105862939B (en) | 2016-05-10 | 2016-05-10 | Immersed tube tunnel basis fills sand equal proportion model test platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307204.9A CN105862939B (en) | 2016-05-10 | 2016-05-10 | Immersed tube tunnel basis fills sand equal proportion model test platform |
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| CN105862939A CN105862939A (en) | 2016-08-17 |
| CN105862939B true CN105862939B (en) | 2019-02-22 |
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Families Citing this family (1)
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| CN107859077B (en) * | 2017-10-10 | 2023-05-30 | 中国建筑科学研究院 | Effective test method and device for waterproof coiled material of test instrument line crossing raft foundation |
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| CN205742300U (en) * | 2016-05-10 | 2016-11-30 | 上海交通大学 | Immersed tube tunnel basis fills sand equal proportion model test platform |
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2016
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| CN2568695Y (en) * | 2002-08-27 | 2003-08-27 | 上海隧道工程股份有限公司 | Dual-tube type bag structure |
| WO2009131397A3 (en) * | 2008-04-24 | 2010-02-11 | Paik Kyu Ho | Vertical load-carrying test apparatus for piles which has a removable loading apparatus, and a vertical load-carrying test method using the same |
| CN102505711A (en) * | 2011-10-20 | 2012-06-20 | 上海交通大学 | System and method for monitoring displacement of foundation construction pipeline section of immersed tunnel |
| CN203429676U (en) * | 2013-08-27 | 2014-02-12 | 中铁十八局集团有限公司 | Immersed tunnel grouting simulation test platform |
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