CN110044712A - A kind of the calm the anger shield mud film of consolidation process of consideration is held one's breath the measurement method of value and amounts of consolidation - Google Patents

A kind of the calm the anger shield mud film of consolidation process of consideration is held one's breath the measurement method of value and amounts of consolidation Download PDF

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Publication number
CN110044712A
CN110044712A CN201910311180.8A CN201910311180A CN110044712A CN 110044712 A CN110044712 A CN 110044712A CN 201910311180 A CN201910311180 A CN 201910311180A CN 110044712 A CN110044712 A CN 110044712A
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China
Prior art keywords
consolidation
mud
film
test
breath
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CN201910311180.8A
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Chinese (zh)
Inventor
朱伟
王超
钱勇进
王璐
徐超
胡涧楠
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Hohai University HHU
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Hohai University HHU
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Priority to CN201910311180.8A priority Critical patent/CN110044712A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/04Investigating osmotic effects
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12Pressure testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0019Compressive
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0042Pneumatic or hydraulic means
    • G01N2203/0044Pneumatic means

Abstract

The invention discloses a kind of the calm the anger shield mud films of consolidation process of consideration to hold one's breath the measurement method of value and amounts of consolidation, this method are as follows: step 1, prepare simulation mud;Step 2, in test cylinder body, using geotextiles as filtration media, pressure slurry is permeated to geotextiles, forms mud film in Geotextile;Step 3, repeat step 2, obtain two pieces of identical mud films, two mud films are respectively placed in two identical experimental rigs of experimental condition, one piece of air-locked film will be covered on one of mud film, same pressure is applied to two pieces of mud films and pressure is gradually increased with phase same rate, the mud film for not covering hermetically sealable film carries out Air-tight Test, and the mud film for covering hermetically sealable film carries out consolidation test;Step 4, the displacement that two pieces of mud films generate during Air-tight Test and the corresponding test of consolidation test is measured respectively, consolidation deformation amount of the mud film in the hold one's breath value and consolidation test in Air-tight Test is obtained, obtains the consolidation deformation amount occurred during mud film is held one's breath and value of holding one's breath.

Description

A kind of the calm the anger shield mud film of consolidation process of consideration is held one's breath the measurement of value and amounts of consolidation Method
Technical field
It holds one's breath the measurement method of value and amounts of consolidation the present invention relates to the shield mud film for the consolidation process that kind considers to calm the anger, belongs to ground Lower field of engineering technology.
Background technique
With the development of China's economy and scientific and technological level, subway tunnel, seepage tunnel and the large-scale construction for getting over the tunnel Jiang Hai Thriving, the problems such as shield machine is commonly encountered cutterhead molding, tool wear in the tunneling process of underground, needs to shut down and open the cabin The characteristics of operation such as maintenance, maintenance of frequently opening the cabin is China's shield tunnel construction.It is with pressure open the cabin technique due to it is applied widely, at Open the cabin method of the characteristics of this is low, short time limit as mainstream.Technique with pressure of opening the cabin is permeated in excavation face using mud forms mud Film maintains air pressure and the soil water pressure at excavation face both ends.The relationship between quality of mud film applied into the life security of cabin personnel with shield Work is gone on smoothly, and the performance of holding one's breath of mud infiltration in the earth formation and mud film is simulated by laboratory test, to construction site into Row assessment guidance, it is great to engineering significance.
Existing hold one's breath is worth evaluation method and ignores or can not consider to consolidate the influence for value of holding one's breath.With the day of edpth of tunnel Benefit becomes larger, and the pressure of mud film two sides accordingly becomes larger, and mud film generates apparent consolidation draining phenomenon during holding one's breath, and then influences The value of holding one's breath of mud film.Consider consolidation of mud film under the conditions of calming the anger, and its influence to value of holding one's breath has important references meaning to engineering Justice.
Summary of the invention
Goal of the invention: it calms the anger the shield mud film of consolidation process technical problem to be solved by the invention is to provide a kind of consideration The measurement method of value of holding one's breath and amounts of consolidation in existing method, can only measure the value of holding one's breath of mud film, cannot measure mud film under air pressure Amounts of consolidation, the method for the present invention first carry out under face pressure measure mud film amounts of consolidation, due under corresponding pressure and rate of pressurization air pressure and The amounts of consolidation of mud film is consistent under face pressure, thus the amounts of consolidation of mud film and value of holding one's breath when breathing freely under the conditions of being calmed the anger.
Mud film is a kind of weak soil being artificially formed, and mud film is influenced to consolidate in closed air, by air pressure, and Consolidation affects the void ratio of mud film, and mud film becomes fine and close, and the pressure (value of holding one's breath) when destruction can also change.Therefore consider The consolidation of mud film under pneumatic pressure to mud film hold one's breath value influence it is very necessary, so to survey consolidation of mud film during holding one's breath Amount.
In order to solve the above technical problems, the technical scheme adopted by the invention is as follows:
A kind of the calm the anger shield mud film of consolidation process of consideration is held one's breath the measurement method of value and amounts of consolidation, specific to include following step It is rapid:
Step 1, simulation mud is prepared, ingredient and the scene mud components with pressure to open the cabin for simulating mud are almost the same;
Step 2, in test cylinder body, using geotextiles as filtration media, pressure slurry is permeated to geotextiles, in geotextiles Surface forms mud film;
Step 3, step 2 is repeated, obtains two pieces of identical mud films, it is complete that two mud films are respectively placed in two experimental conditions In identical experimental rig, one piece of air-locked film will be covered on one of mud film, same pressure is applied to two pieces of mud films And pressure is gradually increased with identical rate of pressurization, the mud film for not covering hermetically sealable film carries out Air-tight Test, is covered with airtight The mud film of film carries out consolidation test;
Step 4, the displacement that two pieces of mud films generate during Air-tight Test and the corresponding test of consolidation test is measured respectively, is obtained To consolidation deformation amount of the mud film in the hold one's breath value and consolidation test in Air-tight Test, to obtain occurring during mud film is held one's breath Consolidation deformation amount and hold one's breath value.
The method of the present invention is after being initially formed two pieces of mud films, it is believed that two pieces of mud films it is identical (mud parameter, slurry penetration pressure with Time of penetration is determined according to actual condition, so as to form different mud films, when mud parameter, slurry penetration pressure, time of penetration And geotextiles it is constant when, same mud film will be formed), one piece of application air pressure, carry out Air-tight Test;It is put on another piece of mud film Air-locked film such as rubber pattern converts face pressure for air pressure and is applied on mud film, consolidated, in corresponding pressure and pressurization The consolidation variation for thinking that two pieces of mud films occur under rate is consistent.
Wherein, in step 2, test cylinder is organic glass cylinder, and test cylinder body bottom is equipped with drainage groove, and geotechnique lays It is placed on groove.
Wherein, in step 2, the mesh number of geotextiles is 100~400 mesh;Geotextiles can adjust mesh number according to demand, with this mould Intend the stratum of different infiltration coefficients, generally 100~400 mesh.Mud is permeated to geotextiles, and geotextiles will filter consolidating in mud Body particle, solid particle, which is gradually accumulated, forms mud film in Geotextile.
Wherein, in step 3, increase air pressure since 0, rate of pressurization is 10kPa/1s~10kPa/120s.Increase since 0 Atmospheric pressure, the rate that control pressure increases, rate of pressurization is generally between 10kPa/1s~10kPa/120s, and rate of pressurization is not Together, mud film, which is held one's breath, is worth difference, and consolidation deformation amount when occurring ventilative is also different.
Wherein, in step 3, the mud film for not covering hermetically sealable film is directly to apply air pressure to mud film, carries out mud film with this and closes Gas test.
Wherein, in step 3, the mud film for being covered with hermetically sealable film is to convert air pressure to face pressure to be applied on mud film, with this Carry out mud film consolidation test.
Wherein, in step 4, the displacement of real-time measurement consolidation test, the real-time consolidation deformation amount of mud film is consolidated equal to mud film The real-time displacement that knot test generates.The drainage groove discharge of draining from test cylinder body bottom is simplified, by later collection device Measurement obtains corresponding displacement.
Wherein, in step 4, the displacement of real-time measurement Air-tight Test, during pressure constantly increases, Air-tight Test row Water quicklys increase in elder generation's short time, is slowly increased later, the correspondence when Air-tight Test displacement increases significantly again suddenly Atmospheric pressure be hold one's breath value of the mud film under the rate of pressurization.It drains from the drainage groove of test cylinder body bottom and cylinder, warp is discharged Later continue collection device measurement and obtain displacement.
Wherein, in step 4, pressure increase is worth the required time to holding one's breath, at this time mud film in corresponding consolidation test Consolidation deformation amount is equal to consolidation deformation amount when mud film is breathed freely under the conditions of calming the anger.Two pieces of mud films are increased with identical rate of pressurization Air pressure, when mud film of holding one's breath fails, the amounts of consolidation of another piece of mud film is exactly the amounts of consolidation during mud film is held one's breath.Compared to direct The thickness for mud film of holding one's breath is measured to calculate amounts of consolidation, since mud film can be sprung back after release, is made with consolidation test measurement displacement Amounts of consolidation for mud film is more accurate.
Compared with the prior art, it is had the beneficial effect that possessed by technical solution of the present invention
The process of slurry penetration film forming in the simple and easy simulation stratum of the method for the present invention energy, and can hold one's breath to mud film Consolidation deformation amount in journey is accurately measured, and is divided so as to influence of the consolidation to value of holding one's breath during holding one's breath to mud film Analysis dynamically effectively assesses mud film quality of holding one's breath with this.
Detailed description of the invention
Fig. 1 is the experimental rig figure of consolidation test in the method for the present invention;Air-tight Test and consolidation test only difference is that Airtight film is not covered on mud film;
In Fig. 1,1 is experimental rig cylinder;2 be mud film;3 be airtight film;4 be pressurization mouth;5 be the row of cylinder body bottom Water groove;6 be geotextiles.
Specific embodiment
The present invention is described in further details combined with specific embodiments below.
Embodiment 1
The present invention consider the to calm the anger shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, and wherein mud uses Select soup mountain bentonite (calcium base, additive-free), Jiangning clay, clear water as basic material (mass ratio 1: 1: 5), then to Wherein add the Na of bentonite dry powder quality 4%2CO3, CMC solution (mass concentration 2%) the preparation mud of quality of mud fluid 2%. Specific gravity 1.2, the test mud of Marsh funnel viscosity 49s are obtained, the mud parameter and Nanjing latitude three pass by river channel slurry shield The mud that machine is selected when carrying out with pressure open the cabin in sand-pebble layer is almost the same.
Geotextiles 6 are laid in test 1 bottom of cylinder, geotextiles 6 use 100 mesh;500g test mud is taken to pour into test cylinder In body 1, apply the pressure of 200kPa to mud, continue 3h, so that mud was seeped geotextiles 6 and form mud film 2.It repeats the above steps, Form two pieces of identical mud films;Every piece formation mud film with a thickness of 9.3mm, total volume 105.18cm3, quality moisture content 100%;
Two mud films are respectively placed in the identical test cylinder 1 of two experimental conditions, wherein on one piece of mud film 2 One piece of air-locked film 3 is covered, the rate of pressurization for being all made of 10kPa/60s to two pieces of mud films gradually increases pressure since 0;
In Air-tight Test, measuring mud film value of holding one's breath is 360kPa, test period 36min, and in Air-tight Test, pressure is increased It is added to hold one's breath and is worth required time (36min), the consolidation deformation amount of mud film is being pressed equal to mud film in corresponding consolidation test at this time Consolidation deformation amount when breathing freely under the conditions of gas, the consolidation deformation amount of mud film is 37.32cm in consolidation test at this time3, lateral confinement situation Under body strain be 35.48%, due to the consolidation deformation of mud film in the consolidation deformation amount of mud film and Air-tight Test in consolidation test Amount is the same, to obtain the value of holding one's breath (360kPa) and consolidation deformation amount (37.32cm of mud film in Air-tight Test3)。
Comparative example 1
This comparative example uses mud same as Example 1, and implementation steps are substantially the same manner as Example 1, the difference is that solid It ties different from rate of pressurization when Air-tight Test.
Geotextiles are laid in test cylinder body bottom, geotextiles use 100 mesh;500g test mud is taken to pour into test simplified It is interior, apply the pressure of 200kPa to mud, continue 3h, so that mud was seeped geotextiles and form mud film;It repeats the above steps, forms two The identical mud film of block, forming mud film thickness is 9.3mm, total volume 105.18cm3, quality moisture content 100%;
Two mud films are respectively placed in the identical test cylinder 1 of two experimental conditions, wherein on one piece of mud film 2 One piece of air-locked film 3 is covered, the rate of pressurization for being all made of 10kPa/100s to two pieces of mud films gradually increases pressure since 0;
In Air-tight Test, measures mud film and hold one's breath value as 450kPa, test period 75min;Mud film consolidation deformation amount at this time For 49.76cm3, the body strain in the case of lateral confinement is 47.31%.
By embodiment 1 and comparative example 1 it is found that the consolidation deformation amount of mud film is bigger, thus mud when rate of pressurization is slower The value of holding one's breath of film is bigger, therefore the amounts of consolidation of mud film under pneumatic pressure is very big, should not ignore, and amounts of consolidation can generate shadow to value of holding one's breath It rings, in certain linear correlation.The method of the present invention analog mud permeates the process of film forming in the earth formation, and can measure mud film It holds one's breath value, while the discharging consolidation deflection that mud extraction film occurs during holding one's breath can be measured.
The method of the present invention has been surveyed hold one's breath during the consolidation deformation amount that occurs of mud film, thus consider calm the anger under the conditions of it is solid Peering mud film is held one's breath the influence of value, and simple and easy, workload is small, can comprehensively assess mud film quality, and value of holding one's breath is bigger, The quality of mud film is better.

Claims (9)

1. a kind of consideration is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, it is characterised in that: specific It comprises the following steps:
Step 1, simulation mud is prepared, ingredient and the scene mud components with pressure to open the cabin for simulating mud are almost the same;
Step 2, in test cylinder body, using geotextiles as filtration media, pressure slurry is permeated to geotextiles, in Geotextile Form mud film;
Step 3, step 2 is repeated, obtains two pieces of identical mud films, it is identical that two mud films are respectively placed in two experimental conditions Experimental rig in, will on one of mud film cover one piece of air-locked film, to two pieces of mud films apply same pressure and with Phase same rate is gradually increased pressure, and the mud film for not covering hermetically sealable film carries out Air-tight Test, be covered with the mud film of hermetically sealable film into Row consolidation test;
Step 4, the displacement that two pieces of mud films generate during Air-tight Test and the corresponding test of consolidation test is measured respectively, obtains mud Consolidation deformation amount of the film in the hold one's breath value and consolidation test in Air-tight Test, so that obtain occurring during mud film is held one's breath consolidates Knot deflection and value of holding one's breath.
2. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: test cylinder is organic glass cylinder in step 2, test cylinder body bottom is equipped with drainage groove, and geotextiles are placed In on groove.
3. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: the mesh number of geotextiles is 100~400 mesh in step 2.
4. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: increasing air pressure since 0 in step 3, rate of pressurization is 10kPa/1s~10kPa/120s.
5. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: the mud film for not covering hermetically sealable film is directly to apply air pressure to mud film in step 3, mud film is carried out with this and is held one's breath Test.
6. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: the mud film for being covered with hermetically sealable film is to convert air pressure to face pressure to be applied on mud film in step 3, with this into Row mud film consolidation test.
7. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: the displacement of real-time measurement consolidation test, the real-time consolidation deformation amount of mud film is consolidated equal to mud film in step 4 Test the real-time displacement generated.
8. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: in step 4, the displacement of real-time measurement Air-tight Test, during pressure constantly increases, Air-tight Test draining It measures and is quicklyd increase in the first short time, is slowly increased later, the corresponding air pressure when increasing significantly Air-tight Test displacement moment Power is hold one's breath value of the mud film under the rate of pressurization.
9. consideration according to claim 1 is calmed the anger, the shield mud film of consolidation process is held one's breath the measurement method of value and amounts of consolidation, It is characterized by: in step 4, by pressure increase to hold one's breath be worth when corresponding consolidation test in the consolidation deformation amount of mud film be equal to mud Consolidation deformation amount when film is breathed freely under the conditions of calming the anger.
CN201910311180.8A 2019-04-17 2019-04-17 A kind of the calm the anger shield mud film of consolidation process of consideration is held one's breath the measurement method of value and amounts of consolidation Pending CN110044712A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104121023A (en) * 2014-07-02 2014-10-29 中交隧道工程局有限公司 Method and device for testing leakage stopping value of excavation face mud film in bulk breaking by slurry shield with pressure
CN105823717A (en) * 2016-03-31 2016-08-03 河海大学 Simple pressure tank model of slurry shield and use method thereof
CN105866337A (en) * 2016-04-21 2016-08-17 河海大学 Device and method for testing slurry shield excavation surface mud film formation and mud film air tightness under high pressure
CN106767358A (en) * 2016-12-12 2017-05-31 山西省交通科学研究院 The measurement apparatus and measuring method of unsaturated soil consolidation deformation amount and displacement
CN108918390A (en) * 2018-08-10 2018-11-30 河海大学 The device and method of mud film forming and measurement mud film amounts of consolidation, air inflow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104121023A (en) * 2014-07-02 2014-10-29 中交隧道工程局有限公司 Method and device for testing leakage stopping value of excavation face mud film in bulk breaking by slurry shield with pressure
CN105823717A (en) * 2016-03-31 2016-08-03 河海大学 Simple pressure tank model of slurry shield and use method thereof
CN105866337A (en) * 2016-04-21 2016-08-17 河海大学 Device and method for testing slurry shield excavation surface mud film formation and mud film air tightness under high pressure
CN106767358A (en) * 2016-12-12 2017-05-31 山西省交通科学研究院 The measurement apparatus and measuring method of unsaturated soil consolidation deformation amount and displacement
CN108918390A (en) * 2018-08-10 2018-11-30 河海大学 The device and method of mud film forming and measurement mud film amounts of consolidation, air inflow

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