CN104453923B - A kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive - Google Patents
A kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive Download PDFInfo
- Publication number
- CN104453923B CN104453923B CN201410561509.3A CN201410561509A CN104453923B CN 104453923 B CN104453923 B CN 104453923B CN 201410561509 A CN201410561509 A CN 201410561509A CN 104453923 B CN104453923 B CN 104453923B
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- dregs
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- 239000006260 foam Substances 0.000 title claims abstract description 96
- 239000013049 sediment Substances 0.000 title claims abstract description 33
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000654 additive Substances 0.000 title claims abstract description 18
- 230000000996 additive effect Effects 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004088 foaming agent Substances 0.000 claims abstract description 41
- 239000002689 soil Substances 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 14
- 230000005641 tunneling Effects 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 20
- 238000002474 experimental method Methods 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive, belongs to earth pressure balanced shield, EPBS technical field of construction.The present invention by the matching of curve math relational expression, obtain Atterberg Limit and foam injects the functional relation of ratio and the slump inject with foam compare, the functional relation of water content.In order to make to be convenient in shield tunneling process effectively set up earth pressure balance, based on the requirement of viscous index 0.4 ~ 0.75, constructing the relational expression that water content and foam inject ratio, and drawing relation curve.In relation curve coordinate axes, determine that best foam injects than scope by best slump range, and then determine best dregs water content ranges according to water content with the relational expression that foam injects ratio.At the scene in application, consider that support pressure is on the impact of foam volume, the dregs coefficient of volumetric expansion and undisturbed soil moisture content, finally give each foaming agent consumption needed for endless tube sheet drilling depth sediment improvement of earth pressure balanced shield, EPBS and water injection rate.The test operation carried out required for the present invention is simple, and experimentation cost is lower, can effectively for site operation.
Description
Technical field
The present invention relates to a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive, belongs to earth pressure balanced shield, EPBS technical field of construction.
Background technology
Earth pressure balanced shield, EPBS construction has that safety is high, driving speed is fast, on advantages such as surrounding enviroment impact are little, particularly along with the development of China's city underground, the application of earth pressure balanced shield, EPBS is more and more extensive, is mainly applicable to granular mass that particle diameter is less than 0.06mm and accounts for dregs total amount and be greater than in the stratum of 30%.In gummy formation earth pressure balanced shield, EPBS work progress, for the ease of setting up earth pressure balance in native storehouse, preventing viscosity dregs mud lining, reduce driving thrust, reduce the moment of torsion of cutterhead and conveying worm and reducing energy consumption, require to improve the stream plasticity of dregs in the front stratum of cutterhead and native storehouse, reduce their friction factor, this just requires to carry out sediment improvement to earth pressure balanced shield, EPBS.Gummy formation sediment improvement realizes often through to additives such as dregs injection water, foam or polymer, wherein extensive with the use of foam.
Although earth pressure balanced shield, EPBS was brought into use from the sixties in last century, many scholars and engineer have carried out many-sided research, the novel sediment improvement agent of continuous proposition, the agent of research sediment improvement, on the impact of shield structure work behavior, gives guidance to instructing sediment improvement.But up to now, the parameter choose of sediment improvement also lacks strong theoretical direction, majority depends on on-the-spot trial, rule of thumb chooses sediment improvement method and parameter, modifies when encountering problems to them.Such trial is cost with the loss of engineering, manpower often.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, providing a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive.
The present invention is a kind of is that the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive comprises the following steps with foam:
Step one
Measure the water content ω of job site undisturbed soil
n;
Step 2
Choose foaming agent, frothing percentage FER>=10 of described foaming agent, described foaming agent produce the half-life t of foam
50>=5min;
Step 3
Inject than FIR by different foams, the foaming agent chosen is injected undisturbed soil, obtains, with a series of liquid limit, plastic limit test dregs, carrying out liquid limit, plastic limit test to this series of experiments dregs, obtain the liquid limit ω testing dregs
lthe relational expression ω of ratio is injected with foam
l=f (FIR); Also obtain the index of plasticity I testing dregs simultaneously
pthe relational expression I of ratio is injected with foam
p=g (FIR);
Step 4
Inject than FIR, different water content ω by different foams, foaming agent and water are injected undisturbed soil of getting, obtain a series of slump experiment dregs, measure the slump T of slump experiment dregs, and set up slump T and foam and inject functional relation than FIR and water content ω:
T＝q(FIR,ω)(1)
According to thickness index I in soil mechanics
cbe defined as: I
c=(ω
l-ω)/I
p, and in shield-tunneling construction, I
cvalue is 0.4 ~ 0.75, so
ω＝ω
L-(0.4～0.75)I
P＝f(FIR)-(0.4～0.75)×g(FIR)＝h(FIR)(2)
Formula (2) is substituted in formula (1), obtains slump T and foam and inject function of a single variable relational expression than FIR:
T＝q[FIR,h(FIR)](3)
Draw the graph of relation of slump T and FIR according to formula (3), and find out best slump T at the graph of relation of slump T and FIR
optimumscope; Described best slump T
optimumscope be 15-20cm, be preferably 16-18cm;
Step 5
According to the best slump T of step 4 gained
optimumscope choose best slump T
optimumbest foam corresponding to scope injects and compares FIR
optimumscope, more best for gained foam injected compare FIR
optimumscope substitute in formula (2) and draw dregs optimum moisture content ω
optimumscope;
Step 6
When utilizing formula (4) to calculate site operation, foam volume V under atmospheric pressure needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet
ffor
V
f＝(P′·V
s·FIR
optimum+P
aV
g/K-P′V
g/K)/P
a(4)
In formula (4)
P ' is earth pressure balanced shield, EPBS support pressure;
P
afor the atmospheric pressure of construction place;
FIR
optimumfor selected best slump T
optimumcorresponding best foam injects ratio;
V
sfor the dregs volume that earth pressure balanced shield, EPBS every drilling depth one endless tube sheet cuts; Described V
s=π D
2l ξ/4, wherein D is shield tunneling diameter, and L is chip length, and ξ is the coefficient of volumetric expansion of undisturbed soil, and namely undisturbed soil cuts the dregs volume of rear formation unmodified and the ratio of undisturbed soil volume;
V
gfor foaming agent volume;
K is foaming agent solution concentration;
Due to
after substituting into formula (4), obtain foaming agent volume V needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet
g:
In formula (5),
K is the concentration of foaming agent solution, and namely foaming agent accounts for the percent by volume of foaming agent solution;
FER is the frothing percentage of foaming agent;
V
ffoam volume under atmospheric pressure needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet;
P ' is earth pressure balanced shield, EPBS support pressure;
P
afor the atmospheric pressure of construction place;
FIR
optimumfor selected best slump T
optimumcorresponding best foam injects ratio;
D is shield tunneling diameter, and L is chip length, and ξ is the coefficient of volumetric expansion of undisturbed soil, and namely undisturbed soil cuts the dregs volume of rear formation unmodified and the ratio of undisturbed soil volume;
Step 7
According to step 5 gained optimum moisture content ω
optimumwith the water content ω of step one gained undisturbed soil itself
n, calculate out water injection rate M needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet according to formula (6)
w:
M
w＝πD
2Lγ(ω
optimum-ω
n)(6)
In formula (6),
D is shield tunneling diameter;
L is chip length;
The dry density on γ stratum residing for excavation anterior shield structure, can survey report and obtains in base area.
The present invention is a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; According to on-the-spot Advance rate, come clear and definite sediment improvement foaming agent charge velocity and rate of water injection.
The present invention is a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive, in practice of construction process, by measuring the water content ω of undisturbed soil
n, undisturbed soil liquid limit, the plastic limit of undisturbed soil and index of plasticity, specify earth pressure balanced shield, EPBS tunneling process and there is incrusted problem, and foaming agent can be adopted to improve dregs.
The present invention is a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; In step 3, inject than FIR by different foams, the foaming agent chosen is injected undisturbed soil, obtains, with a series of liquid limit, plastic limit test dregs, carrying out liquid limit, plastic limit test to this series of experiments dregs, obtain the liquid limit ω testing dregs
linject the relation curve of ratio with foam, according to relation curve fitting result, set up the functional relation ω that liquid limit and foam inject ratio
l=f (FIR); Also obtain the index of plasticity I testing dregs simultaneously
pinject the relation curve of ratio with foam, according to relation curve fitting result, set up index of plasticity I
pthe functional relation I of ratio is injected with foam
p=g (FIR).
The present invention is a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; In step 4, inject than FIR, different water content ω by different foams, foaming agent and water are injected undisturbed soil of getting, obtain a series of slump experiment dregs, measure the slump T of slump experiment dregs, show that setting up slump T and foam injects relation curve than FIR and water content ω, according to relation curve fitting result, set up slump T and foam and inject functional relation than FIR and water content ω:
T＝q(FIR,ω)(1)。
The present invention is a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; Slump value required by effective sediment improvement can by change FIR and ω realize, in other words, can adjust foam inject than and water content reach the requirement of sediment improvement to the stream plasticity changing dregs.Water is more much lower than foam engineering cost, can reduce the demand of foam by increasing water.But the too high meeting of water content causes being difficult in shield tunneling process set up effective earth pressure balance, therefore Chinese scholars specifies the thickness index (I of dregs
c) must in 0.4 ~ 0.75 scope, wherein in soil mechanics, thickness index is defined as: I
c=(ω
l-ω)/I
p; Therefore, water content can be determined:
ω＝ω
L-(0.4～0.75)I
P＝f(FIR)-(0.4～0.75)×g(FIR)＝h(FIR)(2)。
Of the present invention a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; Because earth pressure balanced shield, EPBS support pressure (P ') is than atmospheric pressure (P
a) pressure large, consider that support pressure is on the impact of foam volume, utilizes P × V=constant (P is pressure, and V is foam volume), obtain foam volume under support pressure condition
(V
ffor foam volume under atmospheric pressure, V
gfor foaming agent volume, K is foaming agent solution concentration).
Principle and advantage
The present invention injects function of a single variable relational expression than FIR by setting up slump T and foam, then based on slump consistancy test, the best slump of dregs when acquisition dregs workability is good, and being selection of datum with the best slump, best foam injects ratio and optimum moisture content; During on-the-spot earth pressure balanced shield, EPBS construction, can inject than calculating foam injection rate within the scope of shield structure every drilling depth one endless tube sheet according to best foam, on the basis of optimum moisture content, deduct the water content of undisturbed soil itself in addition, obtain the water injection rate needed for shield structure every drilling depth one endless tube sheet.
The present invention considers the multiple requirement of sediment improvement, and testing program is simple, is easy to realize.Owing to having selected best foam to inject ratio and optimum moisture content, this has just saved the application of sediment improvement agent greatly, decreases the cost of construction to a certain extent.The present invention is high efficiency, the on-the-spot earth pressure balanced shield, EPBS driving of low cost provides scientific basis, by the situation of empirical mode construction before changing, avoids the loss of engineering, manpower greatly.
Accompanying drawing explanation
Accompanying drawing 1 is that slump T injects the function relation curve figure than FIR with foam;
T in Fig. 1
optimumfor the selected best slump, FIR
optimumfor selected best slump T
optimumcorresponding best foam injects ratio.
Detailed description of the invention
Embodiment 1
The first step: earth pressure balanced shield, EPBS passes through interval stratum and chooses soil sample at the scene, for convenient consideration of fetching earth, identical soil sample can be got by the foundation ditch near shield structure interval, note sealing in time soil sample, carry out basic physical parameter test in indoor, obtain the water content (ω of undisturbed soil
n), liquid limit, plastic limit and index of plasticity, determine that earth pressure balanced shield, EPBS tunneling process can exist incrusted problem, to select foaming agent, shield structure dregs improved;
Second step: evaluate foaming agent, the frothing percentage FER and the foaming agent that measure foaming agent under atmospheric pressure produce foamy meltdown time graph, require that FER is greater than 10, require the half-life t obtaining foam according to foam dissipates time graph in addition
50be more than or equal to 5min, only have and meet FER and t
50the foaming agent required just can use;
3rd step: inject than FIR by different foams, injects undisturbed soil by the foaming agent chosen, obtains, with a series of liquid limit, plastic limit test dregs, carrying out liquid limit, plastic limit test to this series of experiments dregs, obtains the liquid limit ω testing dregs
linject the relation curve of ratio with foam, according to the result of relation curve Mathematical Fitting, set up the functional relation ω that liquid limit and foam inject ratio
l=f (FIR); Also obtain the index of plasticity I testing dregs simultaneously
pinject the relation relation curve of ratio with foam, according to the result of relation curve Mathematical Fitting, set up the functional relation I that plastic limit and foam inject ratio
p=g (FIR);
4th step: inject than FIR, different water content ω by different foams, foaming agent and water are injected undisturbed soil of getting, obtain a series of slump experiment dregs, measure the slump T of slump experiment dregs, show that setting up slump T and foam injects relation curve than FIR and water content ω, according to the Mathematical Fitting result of relation curve, set up slump T and foam and inject functional relation than FIR and water content ω:
T＝q(FIR,ω)(1)
According to thickness index I in soil mechanics
cbe defined as: I
c=(ω
l-ω)/I
p, and in shield-tunneling construction, I
cvalue is 0.4 ~ 0.75, so
ω＝ω
L-(0.4～0.75)I
P＝f(FIR)-(0.4～0.75)×g(FIR)＝h(FIR)(2)
Formula (2) is substituted in formula (1), obtains slump T and foam and inject function of a single variable relational expression than FIR:
T＝q[FIR,h(FIR)](3)
Draw the graph of relation of slump T and FIR according to formula (3), and find out best slump T at the graph of relation of slump T and FIR
optimumscope; Described best slump T
optimumscope be 15-20cm, be preferably 16-18cm.
5th step: according to the best slump T of step 4 gained
optimumscope choose best slump T
optimumbest foam corresponding to scope injects and compares FIR
optimumscope, more best for gained foam injected compare FIR
optimumscope substitute in formula (2) and draw dregs optimum moisture content ω
optimumscope; And then construct for on-the-spot guidance earth pressure balanced shield, EPBS;
6th step: consider that support pressure is on the impact of foam volume and the dregs coefficient of volumetric expansion, foam volume under the atmospheric pressure adopting formula (4) to calculate for sediment improvement.Due to
obtain the foaming agent volume needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet sediment improvement after substituting into formula (4), can calculate according to formula (5).
7th step: the moisture content of deduction undisturbed soil, calculates water injection rate (M needed for shield structure every drilling depth one endless tube sheet by formula (6)
w).
8th step: last according to on-the-spot Advance rate, comes clear and definite sediment improvement foaming agent charge velocity and rate of water injection.
Claims (5)
1. be a choosing method for the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive with foam, it is characterized in that, comprise the following steps:
Step one
Measure the water content ω of job site undisturbed soil
n;
Step 2
Choose foaming agent, frothing percentage FER>=10 of described foaming agent, described foaming agent produce the half-life t of foam
50>=5min;
Step 3
Inject than FIR by different foams, the foaming agent chosen is injected undisturbed soil, obtains, with a series of liquid limit, plastic limit test dregs, carrying out liquid limit, plastic limit test to this series of experiments dregs, obtain the liquid limit ω testing dregs
lthe relational expression ω of ratio is injected with foam
l=f (FIR); Also obtain the index of plasticity I testing dregs simultaneously
pthe relational expression I of ratio is injected with foam
p=g (FIR);
Step 4
Inject than FIR, different water content ω by different foams, foaming agent and water are injected undisturbed soil of getting, obtain a series of slump experiment dregs, measure the slump T of slump experiment dregs, and set up slump T and foam and inject functional relation than FIR and water content ω:
T＝q(FIR,ω)(1)
According to thickness index I in soil mechanics
cbe defined as: I
c=(ω
l-ω)/I
p, and in shield-tunneling construction, I
cvalue is 0.4 ~ 0.75, so
ω＝ω
L-(0.4～0.75)I
P＝f(FIR)-(0.4～0.75)×g(FIR)＝h(FIR)(2)
Formula (2) is substituted in formula (1), obtains slump T and foam and inject function of a single variable relational expression than FIR:
T＝q[FIR,h(FIR)](3)
Draw the graph of relation of slump T and FIR according to formula (3), and find out best slump T at the graph of relation of slump T and FIR
optimumscope; Described best slump T
optimumscope be 15-20cm;
Step 5
According to the best slump T of step 4 gained
optimumscope choose best slump T
optimumbest foam corresponding to scope injects and compares FIR
optimumscope, more best for gained foam injected compare FIR
optimumscope substitute in formula (2) and draw dregs optimum moisture content ω
optimumscope;
Step 6
When utilizing formula (4) to calculate site operation, foam volume V under atmospheric pressure needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet
f,
V
f＝(P′·V
s·FIR
optimum+P
aV
g/K-P′V
g/K)/P
a(4)
In formula (4)
P ' is earth pressure balanced shield, EPBS support pressure;
P
afor the atmospheric pressure of construction place;
FIR
optimumfor selected best slump T
optimumcorresponding best foam injects ratio;
V
sfor the dregs volume that earth pressure balanced shield, EPBS every drilling depth one endless tube sheet cuts; Described V
s=π D
2l ξ/4, wherein D is shield tunneling diameter, and L is chip length, and ξ is the coefficient of volumetric expansion of undisturbed soil, and namely undisturbed soil cuts the dregs volume of rear formation unmodified and the ratio of undisturbed soil volume;
V
gfor foaming agent volume;
K is foaming agent solution concentration;
Due to
after substituting into formula (4), obtain foaming agent volume V needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet drilling depth
g:
In formula (5),
K is the concentration of foaming agent solution;
FER is the frothing percentage of foaming agent;
V
ffoam volume under atmospheric pressure needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet;
P ' is earth pressure balanced shield, EPBS support pressure;
P
afor the atmospheric pressure of construction place;
FIR
optimumfor selected best slump T
optimumcorresponding best foam injects ratio;
D is shield tunneling diameter, and L is chip length, and ξ is the coefficient of volumetric expansion of undisturbed soil, and namely undisturbed soil cuts the dregs volume of rear formation unmodified and the ratio of undisturbed soil volume;
Step 7
According to step 5 gained optimum moisture content ω
optimumwith the water content ω of step one gained undisturbed soil itself
n, calculate out water injection rate M needed for earth pressure balanced shield, EPBS every drilling depth one endless tube sheet according to formula (6)
w:
M
w＝πD
2Lγ(ω
optimum-ω
n)(6)
In formula (6),
D is shield tunneling diameter;
L is chip length;
The dry density on γ stratum residing for excavation anterior shield structure.
2. according to claim 1 a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; It is characterized in that: according to on-the-spot Advance rate, determine the charge velocity of foaming agent and the charge velocity of water.
3. according to claim 1 a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; It is characterized in that: in step 3, inject than FIR by different foams, the foaming agent chosen is injected undisturbed soil, obtains, with a series of liquid limit, plastic limit test dregs, carrying out liquid limit, plastic limit test to this series of experiments dregs, obtain the liquid limit ω testing dregs
linject the relation curve of ratio with foam, according to relation curve fitting result, set up the functional relation ω that liquid limit and foam inject ratio
l=f (FIR); Also obtain the index of plasticity I testing dregs simultaneously
pinject the relation curve of ratio with foam, according to relation curve fitting result, set up index of plasticity I
pthe functional relation I of ratio is injected with foam
p=g (FIR).
4. according to claim 1 a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; It is characterized in that: in step 4, inject than FIR, different water content ω by different foams, foaming agent and water are injected undisturbed soil of getting, obtain a series of slump experiment dregs, measure the slump T of slump experiment dregs, show that setting up slump T and foam injects relation curve than FIR and water content ω, according to relation curve fitting result, set up slump T and foam and inject functional relation than FIR and water content ω:
T＝q(FIR,ω)(1)。
5. according to claim 1 a kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive; It is characterized in that: described best slump T
optimumscope be 16-18cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561509.3A CN104453923B (en) | 2014-10-21 | 2014-10-21 | A kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561509.3A CN104453923B (en) | 2014-10-21 | 2014-10-21 | A kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive |
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| Publication Number | Publication Date |
|---|---|
| CN104453923A CN104453923A (en) | 2015-03-25 |
| CN104453923B true CN104453923B (en) | 2016-04-06 |
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| CN111881549B (en) * | 2020-06-16 | 2024-08-20 | 中建五局土木工程有限公司 | Method for determining daily tunneling yield and construction period of earth pressure balance shield of viscous soil stratum |
| CN112100709B (en) * | 2020-08-04 | 2022-05-10 | 中南大学 | Method for determining muck foam improvement parameters based on shield reasonable tunneling parameter analysis |
| CN112473408A (en) * | 2020-12-15 | 2021-03-12 | 中国电建集团铁路建设有限公司 | Earth pressure balance shield foam system, working method and calculation method |
| CN113011094B (en) * | 2021-03-19 | 2022-10-04 | 哈尔滨工业大学 | Soil pressure balance shield tunneling machine muck improvement method based on mixed GBDT and random forest algorithm |
| CN114320322B (en) * | 2021-12-23 | 2023-07-21 | 中交第二航务工程局有限公司 | Method for improving earth pressure balance shield residue soil of weathered granite stratum |
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| JPS6425519A (en) * | 1987-07-22 | 1989-01-27 | Matsushita Electric Ind Co Ltd | Evaporating apparatus for volatile material |
| JP2768104B2 (en) * | 1992-01-23 | 1998-06-25 | 株式会社大林組 | Mechanical shield excavation method using foaming agent |
| CN100543270C (en) * | 2008-08-04 | 2009-09-23 | 中铁十一局集团城市轨道工程有限公司 | The job practices of composite soil pressure balance tunnel shielding machine for traversing shallow-buried water-rich sand layer |
| CN101749025B (en) * | 2009-12-24 | 2012-11-28 | 上海隧道工程股份有限公司 | Improved construction method of soil mass of extra-large-diameter soil pressure balancing shield on soft soil stratum |
| CN103575616B (en) * | 2013-11-18 | 2015-07-08 | 中南大学 | Foaming performance testing device for shield muck-improving foaming agent and using method of foaming performance testing device |
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