CN105911249B - Simulate the test method of sandy soils erodsion loss around duct pieces of shield tunnel seam - Google Patents
Simulate the test method of sandy soils erodsion loss around duct pieces of shield tunnel seam Download PDFInfo
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- CN105911249B CN105911249B CN201610224037.1A CN201610224037A CN105911249B CN 105911249 B CN105911249 B CN 105911249B CN 201610224037 A CN201610224037 A CN 201610224037A CN 105911249 B CN105911249 B CN 105911249B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The present invention relates to a kind of test method for simulating sandy soils erodsion loss around duct pieces of shield tunnel seam, used equipment includes air pump system, master trip system, pressurised water tank system and data collecting system, and master trip system includes the master trip case of bottom opening；The top of master trip case is provided with top pressure closure, and detachable pressurised airbag is connected with top cover and is fixed with precise pressure regulating valve and digital display manometer；The bottom of master trip case is provided with miniature ventage piezometer and miniature earth pressure gauge；The bottom of master trip case is tightly connected with two pieces of adjustable bottom plates of L-type by master trip lower box part elastic sealing gasket and L-type bottom plate elastic sealing gasket, connected between two pieces of adjustable bottom plates of L-type by leading screw, groove is provided with two pieces of adjustable bottom plates of L-type, for fixing L-type bottom plate elastic sealing gasket.Adjusting screw during experiment, slit width is set to correspond to duct pieces of shield tunnel joint open.The present invention erosion condition of the different type soil body can be assessed around abutment joint.
Description
Technical field
It is main suitable the present invention relates to a kind of test method for simulating sandy soils erodsion loss around duct pieces of shield tunnel seam
For the erodsion loss situation of shield duct piece surrounding soil to be assessed and predicted.
Background technology
Shield tunnel is usually to be formed by many water-tight concrete pipe sheet assemblings, due to the differential settlement in tunnel so that
During constructing tunnel and operation, localized seepage easily occurs, seepage easily takes the fine particle in the soil body out of, and formation is invaded
Erosion.Local erosion makes shield duct piece lose soil body support, deals with improperly, will form disaster, causes huge environment to influence and pass through
Ji loss.Monitoring and evaluation shield tunnel seam surrounding soil erodsion loss situation, it can both reflect the disease journey of shield duct piece
Degree, can be predicted to the development of tunnel defect, have great practical significance again.
Traditional test method is only limited to test the water resistance of section of jurisdiction elastic sealing gasket, such as《Macromolecule
The part of waterproof material the 4th：Shield tunnel section of jurisdiction rubber gasket》Simulation pipe is utilized described in (GB 18173.4-2010)
The test method that piece T-shape and the water pressure resistance testing device of " one " type assembly seam are carried out, it is all no the soil body to be considered it
In, simply merely carry out elastic sealing gasket waterproof test.Tunnel seam is easy leakage area, after seam leak, its week
Different degrees of erosion and loss will be occurred by enclosing the soil body, and disease occurs for tunnel.Need sentencing for a set of rational tunnel defect badly at present
Not and appraisal procedure, periodically protected with carrying out specific aim to the tunnel of service phase.
The content of the invention
The present invention provides a kind of simulation duct pieces of shield tunnel seam week to solve technical problem present in known technology
Enclose the test method of sandy soils erodsion loss, this method makes it possible the erosion degree of assessment segment joint surrounding soil.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：
A kind of test method for simulating sandy soils erodsion loss around duct pieces of shield tunnel seam, used experiment are set
It is standby, including：Including air pump system (1), master trip system (2), pressurised water tank system (3) and data collecting system (4), wherein,
Described master trip system (2) includes support (32), the master trip case (17) for the bottom opening being fixed on support (32)；Main examination
The top of tryoff (17) is provided with top pressure closure (16), and detachable pressurised airbag (23) is connected with top cover and is fixed with accurate voltage regulating
Valve (13) and digital display manometer (12), precise pressure regulating valve (13) are connected to described air pump system (1) and detachable pressurised airbag
(23) between, for controlling the air pressure of detachable pressurised airbag (23), digital display manometer (12) is used to control, shows detachable add
The atmospheric pressure value of pressuring gasbag (23)；Master trip case (17) is additionally provided with the deflation valve (14) for being connected to detachable pressurised airbag (23)
And it is connected to the water intaking valve (25) of pressurised water tank system (3)；
The bottom of master trip case (17) passes through master trip lower box part elastic sealing gasket (28) with two pieces of adjustable bottom plates of L-type (26)
It is tightly connected, is connected between two pieces of adjustable bottom plates of L-type (26) by leading screw (27), two with L-type bottom plate elastic sealing gasket (29)
Block L-type is adjustable, and bottom plate (26) is provided with groove, for fixing L-type bottom plate elastic sealing gasket (29)；
The bottom of master trip case (17) is soil body container, and is provided with miniature ventage piezometer (22) and miniature earth pressure gauge
(21)；Both are admitted to data collecting system (4) by the signal of collection；
It is to be measured for accepting and measuring the leak sand leakage of the soil sample leaked down (24) and water in the lower section of master trip case (17)
Instrument (24)；
The test method follows the steps below：
(1) after pilot system assembling, the leading screw (27) at the adjustable bottom plate of L-type (26) place is adjusted, makes two pieces of adjustable bottoms of L-type
Slit width between plate (26) reaches the theoretical minimum joint open of sealing gasket, and the slit width corresponds to duct pieces of shield tunnel joint open, fixed L-type
Adjustable bottom plate (26)；
(2) to the soil sample (24) for loading simulation shield tunnel present position in master trip case (17), soil sample (24) is taken point
Layer is loaded and is compacted, and is filled at 2/3 internal graduation mark of master trip case (17)；
(3) the top cover plate (16) and good seal for having connected detachable pressurised airbag (23) are closed, and opens data
Acquisition system (4), preparation start to gather test data；
(4) air pump system (1) is opened, is detachably added to master trip system (2) is internal by top precise pressure regulating valve (13)
Pressuring gasbag (23) applies air pressure, and air bag acts on soil body surface, applies soil pressure for soil sample (24)；
(5) slit width of the adjustable bottom plate 26 of two pieces of L-types is adjusted to predetermined slit width using leading screw 27；
(6) pressurised water tank system (3) is adjusted to predetermined altitude, opens the outlet valve (8) of pressurised water tank system (3) and main examination
The water intaking valve (25) of check system (2)；
(7) underground water flows out from seam crossing, drives soil particle around seam that erodsion loss occurs, so as to measure certain seepage flow
Erodsion loss amount corresponding to time difference hydraulic pressure (flow), terminate experiment.
Preferably, the top of master trip case is sealedly connected with upper cap by square O-ring seal (20)
Plate (16).Observation window (18) is offered on master trip case (17).
The present invention has the advantages and positive effects of：Pilot system can simulate influence of the seepage for the soil body, can be with
Easily the erosion condition of the different type soil body is assessed and predicted around abutment joint, and reference is provided for engineering reparation；Air pump
System, pressurised water tank system and leading screw can realize the accurate control to experiment.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the master trip system three-dimensional cutaway view of the present invention；
Fig. 3 is the master trip case three-dimensional cutaway view of the present invention；
Fig. 4 is the adjustable bottom plate dimensional structure diagram of L-type of the present invention；
Fig. 5 is master trip lower box part elastic sealing gasket and the signal of lower L-type bottom plate elastic sealing gasket stereochemical structure of the present invention
Figure.
In figure：1st, air pump system；2nd, master trip system；3rd, pressurised water tank system；4th, data collecting system；5th, water tank；6、
Water intaking valve；7th, delivery port；8th, outlet valve；9th, Acquisition Instrument；10th, data analysis system；11st, display；12nd, digital display manometer；13、
Precise pressure regulating valve；14th, deflation valve；15th, top cover plate bolt；16th, top cover plate；17th, master trip case；18th, observation window；19、
Water filling valve；20th, square O-ring seal；21st, miniature earth pressure gauge；22nd, miniature ventage piezometer；23rd, detachably pressurize gas
Capsule；24th, soil sample；25th, water intaking valve；26th, the adjustable bottom plate of L-type；27th, leading screw；28th, master trip lower box part elastic sealing gasket；29th, L-type
Bottom plate elastic sealing gasket；30th, bed bolt；31st, frame upper bolt；32nd, support；33rd, bearing chassis；34th, support bottom spiral shell
Bolt；35th, bearing roller；36th, leak sand leakage measuring instrument.
Embodiment
The present invention will be described below in conjunction with the accompanying drawings：
The required master trip system of the present invention as shown in figure 1, refer to Fig. 1~Fig. 5, elastic sealing gasket of the invention, soil,
The coefficient shield tunnel leak test system of water, including air pump system 1, master trip system 2, pressurised water tank system 3, data
Acquisition system 4；Air pump system 1 is connected with master trip system 2 by flexible pneumatic hose；Pressurised water tank system 3 is positioned at experiment institute
The height and position specified needed, pressurised water tank system 3 are connected with master trip system 2 by water pipe；Data collecting system 4 and main examination
Check system 2 is connected by data conductor.
Described master trip system include digital display manometer 12, precise pressure regulating valve 13, deflation valve 14, top cover plate 16,
Top cover plate bolt 15, Water filling valve 19, master trip case 17, detachable pressurised airbag 23, water intaking valve 25, miniature earth pressure gauge
21st, miniature ventage piezometer 22, observation window 18, L-type is adjustable bottom plate 26, bed bolt 30, leading screw 27, master trip lower box part elasticity
Sealing gasket 28, L-type bottom plate elastic sealing gasket 29, support 32, frame upper bolt 31, support lower bolt 34, bearing chassis 33,
Bearing roller 35, leak sand leakage measuring instrument 36；Digital display manometer 12 is connected by flexible pneumatic hose with air pump system 1, number
Aobvious pressure gauge 12 is connected to the upper end of precise pressure regulating valve 13, and the lower end of precise pressure regulating valve 13 is fixed on top cover plate 16 and connected
The detachable pressurised airbag 23 being fixed on top cover plate 16, deflation valve 14 and Water filling valve 19 are fixed on top cover plate 16
On, top cover plate 16 is connected with master trip case 17 by top cover plate bolt 15, the U between top cover plate 16 and master trip case 17
It is square O-ring seal 20 in shape groove, main viewfinder 18 is fixed on master trip case 17 by the sealing of plastic-steel mud, miniature pore water pressure
Count 22 and miniature earth pressure gauge 21 is affixed on the back side inwall of master trip case 17 and adjustable 26 plate upper surface of left side L-type, wire pass through
Seal is drawn and is connected with data collecting instrument 9, and the one end of water intaking valve 25 is located at the side wall of master trip case 17, the other end of water intaking valve 25
It is connected by water pipe with pressurised water tank system 3, water intaking valve 25 has the function of overflow pipe, the adjustable bottom plate 26 of two pieces of bottom L-type concurrently
It is connected with master trip case 17 by bed bolt 30, has L-type in U-lag between the adjustable bottom plate 26 of L-type and master trip case 17
Bottom plate elastic sealing gasket 29 and master trip lower box part elastic sealing gasket 28, connected by leading screw 27 between two pieces of L-types are adjustable bottom plate 26
Connect, master trip case 17 is connected by frame upper bolt 31 with support 32, and support 32 passes through support lower bolt 34 and bearing
Chassis 33 is connected, and bearing roller 35 is fixed on bearing chassis 33；Leak sand leakage measuring instrument 36 is located at two pieces of adjustable bottom plates of L-type
Between 26 below gap, leak sand leakage measuring instrument 36 is combined into by identical transparent organic glass groove
Top cover plate 16 seals master trip case 17 by square O-ring seal 20, and L-type is adjustable, and bottom plate 26 is divided to for two pieces, both
The bottom of master trip case 17 can be sealed, section of jurisdiction elastic sealing gasket can be simulated again, seam joint open size can also be adjusted；It is special
Air pressure can be converted into by detachable pressurised airbag 23 acts on soil body surface soil pressure；Bottom self-control leak sand leakage measuring instrument 36 can
Obtain sand leakage in different time, water leakage.
Pressurised water tank system includes water intaking valve 6, water tank 5, delivery port 7 and outlet valve 8；Tank intake valve of water 6 is located at the side of water tank 5
At wall, outlet valve 8 is located at the bottom of water tank 5, and outlet valve 8 is connected with master trip system 2 by water pipe.
Data collecting system includes data collecting instrument 9, data analysis system 10, display 11；Acquisition Instrument 9 and master trip system
System 2 is connected by data conductor, and Acquisition Instrument 9 is connected with data analysis system 10 by data conductor, data analysis system 10 and
Display 11 is connected by data conductor.
Specific implementation step is as follows：
(1) after pilot system assembles according to accompanying drawing, at the adjustable bottom plate of L-type 26 leading screw 27 is adjusted, makes two pieces of L-types can
Adjust the slit width between bottom plate 26 to reach minimum joint open in theory, then tighten bed bolt 30 so that L-type is adjustable bottom plate 26
It is fixed up position；
(2) soil sample 24 of shield tunnel present position is loaded into master trip case 17, soil sample 24 is taken layering to load and pressed
It is real, it is filled at 2/3 graduation mark inside master trip case 17；
(3) the top cover plate 16 for having connected detachable pressurised airbag 23 is closed, tightens top cover plate bolt 15, and beat
Data collecting system 4 is opened, preparation starts to gather test data；
(4) air pump system 1 is opened, by top precise pressure regulating valve 13 to the detachable pressurised airbag in the inside of master trip system 2
23 apply air pressure, and air bag acts on soil body surface, apply soil pressure for soil sample 24；
(5) slit width of the adjustable bottom plate 26 of two pieces of L-types is adjusted to predetermined slit width using leading screw 27；
(6) pressurised water tank system 3 is adjusted to predetermined altitude, the outlet valve 8 and master trip system of opening pressurised water tank system 3
2 water intaking valve 25.
(7) water flows out from seam crossing, drives soil particle around seam that erodsion loss occurs, so as to measure certain Seepage flow time
Erodsion loss amount corresponding to different hydraulic pressure (flow), terminate experiment.
Claims (3)
1. a kind of test method for simulating sandy soils erodsion loss around duct pieces of shield tunnel seam, used testing equipment bag
Include：Air pump system (1), master trip system (2), pressurised water tank system (3) and data collecting system (4), wherein, described main examination
Check system (2) includes support (32), the master trip case (17) for the bottom opening being fixed on support (32)；Master trip case (17)
Top is provided with top pressure closure (16), and detachable pressurised airbag (23) is connected with top cover and is fixed with precise pressure regulating valve (13) sum
Aobvious pressure gauge (12), precise pressure regulating valve (13) are connected between described air pump system (1) and detachable pressurised airbag (23), are used
In the air pressure for controlling detachable pressurised airbag (23), digital display manometer (12) is used to control, show detachable pressurised airbag (23)
Atmospheric pressure value；Master trip case (17) is additionally provided with the deflation valve (14) for being connected to detachable pressurised airbag (23) and is connected to
The water intaking valve (25) of pressurised water tank system (3)；
The bottom of master trip case (17) passes through master trip lower box part elastic sealing gasket (28) and L with two pieces of adjustable bottom plates of L-type (26)
Type bottom plate elastic sealing gasket (29) is tightly connected, and is connected between two pieces of adjustable bottom plates of L-type (26) by leading screw (27), in two pieces of L
Type is adjustable, and bottom plate (26) is provided with groove, for fixing L-type bottom plate elastic sealing gasket (29)；
The bottom of master trip case (17) is soil body container, and is provided with miniature ventage piezometer (22) and miniature earth pressure gauge
(21)；Both are admitted to data collecting system (4) by the signal of collection；
It is the leak sand leakage measuring instrument for accepting and measuring the soil sample leaked down (24) and water in the lower section of master trip case (17)
(24)；
The test method follows the steps below：
(1) after pilot system assembling, the leading screw (27) at the adjustable bottom plate of L-type (26) place is adjusted, makes two pieces of adjustable bottom plates of L-type
(26) slit width between reaches the theoretical minimum joint open of sealing gasket, and the slit width corresponds to duct pieces of shield tunnel joint open, and fixed L-type can
Adjust bottom plate (26)；
(2) soil sample (24) of simulation shield tunnel present position is loaded into master trip case (17), soil sample (24) takes layering to fill
Fill out and be compacted, be filled at 2/3 internal graduation mark of master trip case (17)；
(3) the top cover plate (16) and good seal for having connected detachable pressurised airbag (23) are closed, and opens data acquisition
System (4), preparation start to gather test data；
(4) air pump system (1) is opened, by top precise pressure regulating valve (13) to the internal detachable pressurization gas of master trip system (2)
Capsule (23) applies air pressure, and air bag acts on soil body surface, applies soil pressure for soil sample (24)；
(5) slit width of two pieces of adjustable bottom plates of L-type (26) is adjusted to predetermined slit width using leading screw (27)；
(6) pressurised water tank system (3) is adjusted to predetermined altitude, the outlet valve (8) of opening pressurised water tank system (3) and master trip system
The water intaking valve (25) of system (2)；
(7) underground water flows out from seam crossing, drives soil particle around seam that erodsion loss occurs, so as to measure certain Seepage flow time
Erodsion loss amount corresponding to different hydraulic pressure, terminate experiment.
2. test method according to claim 1, it is characterised in that the top of master trip case passes through square O-ring seal
(20) it is sealedly connected with top cover plate (16).
3. test method according to claim 1, it is characterised in that offer observation window on master trip case (17)
(18)。
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| CN106321115B (en) * | 2016-11-08 | 2018-09-25 | 苏州大学 | A kind of shield tunnel construction model construction method |
| CN106769747B (en) * | 2016-11-17 | 2019-04-30 | 河海大学 | The experimental rig and its test method that soil body inflation resistance is seeped |
| CN108426706B (en) * | 2018-02-02 | 2023-10-17 | 西南交通大学 | Shield type TBM tunnel segment design test bench for high water pressure area |
| CN110044529B (en) * | 2019-03-28 | 2020-12-01 | 天津大学 | Method for measuring soil pressure outside shield tunnel |
| CN110702883B (en) * | 2019-10-31 | 2022-04-01 | 同济大学 | Shield tunnel leakage erosion simulation test device and method |
| CN111272629A (en) * | 2020-02-25 | 2020-06-12 | 天津大学 | Device for tunnel seepage erosion model test in sandy soil stratum |
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