CN109580425A - A kind of shield improvement dregs liquid-plastic state evaluation method based on slump consistancy test - Google Patents
A kind of shield improvement dregs liquid-plastic state evaluation method based on slump consistancy test Download PDFInfo
- Publication number
- CN109580425A CN109580425A CN201811300483.1A CN201811300483A CN109580425A CN 109580425 A CN109580425 A CN 109580425A CN 201811300483 A CN201811300483 A CN 201811300483A CN 109580425 A CN109580425 A CN 109580425A
- Authority
- CN
- China
- Prior art keywords
- value
- improved
- muck
- slump
- platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011156 evaluation Methods 0.000 title abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract 12
- 239000002689 soil Substances 0.000 claims description 10
- 230000005641 tunneling Effects 0.000 abstract 1
- 239000013049 sediment Substances 0.000 description 8
- 239000006260 foam Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 flocculant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N2011/006—Determining flow properties indirectly by measuring other parameters of the system
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
本发明公开了一种基于坍落度试验的盾构改良渣土流塑状态评价方法，首先对改良渣土进行坍落度试验；测定改良渣土坍落后的坍落度值h、延展度值D及顶部直径d，其中d的取值依据渣土状态分为三种情况：①改良渣土顶部没有平台，流动性、塑性较差，此时d值取为0；②改良渣土顶部没有平台，流动性较强，此时d值与延展度值D相等；③改良渣土顶部形成平台，此时d值取为平台直径；综合改良渣土的坍落度h、延展度D及顶部直径d这“三大指标”，计算综合指标F＝(D‑d)/h(F值表征了改良渣土整体的流动及变形特征)。本方法相较于目前常用的渣土改良评价方法，更加合理、准确，具有更好的可行性和更高的推广价值。
The invention discloses a slump test-based method for evaluating the flow plastic state of modified slag for shield tunneling. First, a slump test is performed on the improved slag; the slump value h and the ductility value after the slump of the improved slag are measured. D and the top diameter d, where the value of d is divided into three cases according to the state of the muck: ① the top of the improved muck has no platform, and the fluidity and plasticity are poor. At this time, the value of d is set to 0; ② the top of the improved muck has no platform The platform has strong fluidity, and the d value is equal to the ductility value D at this time; ③ the top of the improved muck forms a platform, and the d value is taken as the diameter of the platform at this time; the slump h, ductility D and top of the improved muck are comprehensively For the "three major indexes" of diameter d, the comprehensive index F=(D-d)/h is calculated (the F value represents the overall flow and deformation characteristics of the improved slag). Compared with the commonly used muck improvement evaluation methods, this method is more reasonable and accurate, and has better feasibility and higher promotion value.
Description
Technical field
The invention belongs to the sediment improvement field of shield-tunneling construction, specifically a kind of shield improvement based on slump consistancy test
Dregs liquid-plastic state evaluation method.
Background technique
For shield machine as machinery common in subway work, its basic principle is by applying certain pressure to excavation face
Power maintains its stabilization, and it is different to apply stressed mode according to it, can be divided into slurry type shield, earth pressure balanced shield etc..And
Earth pressure balanced shield, EPBS is suitable for various stratum in addition to the strong permeability formation of high hydraulic pressure, driving speed is fast, effect on environment is small and
Relative inexpensiveness becomes the preferred manner of most cities subway construction.
Balancing earth-pressure shielding machine be using the dregs in native storehouse as the medium for stablizing excavation face, therefore, dregs in native storehouse
State is particularly important for efficiency, the safety of practice of construction.In order to guarantee that dregs has good stream mecystasis, need to it
Certain additive (foaming agent, flocculant, dispersing agent etc.) is added to be improved, and the most common additive of sediment improvement at present
It is exactly foaming agent, it is therefore desirable to a method of reasonable evaluation foam improves dregs stream mecystasis.
Currently, being based on slump consistancy test for the evaluation of sediment improvement state, common evaluation method is mainly basis more
The size of the slump value or extension angle value of improveing dregs flows mecystasis (Vinai, 2008 etc.) to evaluate it.Slump consistancy test
The ability that finally deforms of the measurement improvement dregs under Gravitative Loads, measurement be dregs under low shearing speed mobility
Can, and slump value and extension angle value only characterize the deformation behaviour of dregs in one direction, for improveing the entirety of dregs
Flow behavior is not embodied, therefore usually will appear improvement dregs slump value or extension angle value is met the requirements, but practical
The stream mecystasis of upper improvement dregs is unsatisfactory for requiring, therefore the stream plasticity shape of improvement dregs is judged according to above two method
State is inaccurate.
Summary of the invention
The application aims to solve at least one of the technical problems existing in the prior art.For this purpose, an object of the present invention
It is to provide a kind of evaluation result the more reasonable shield improvement dregs liquid-plastic state evaluation with accurately based on slump consistancy test
Method.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of shield improvement dregs liquid-plastic state evaluation method based on slump consistancy test, includes the following steps:
S1: slump consistancy test is carried out to improvement dregs；
S2: measurement improves slump value h, extension angle value D and top diameter d after dregs collapses, wherein the value foundation of d
Dregs state is divided into three kinds of situations: 1. improveing and does not form platform at the top of dregs, mobility, plasticity are poor, and d value is taken as 0 at this time；
2. not forming platform at the top of improvement dregs, more liquid, d value is equal with extension angle value D at this time；3. improveing shape at the top of dregs
At platform, d value is taken as platform diameter at this time；
S3: slump h, the extensibility D and tri- indexs of top diameter d of comprehensive improvement dregs, Calculation Estimation overall target F
=(D-d)/h, the flowing and deformation behaviour of F value characterization improvement dregs entirety.
Further, evaluate sediment improvement situation according to overall target F value: when F ∈ [0,1], sediment improvement state is closed
Suitable (stream plasticity is good)；As F > 1, dregs is in improvement state of owing (it is poor loosely, to flow plasticity)；As F=0, dregs is in
Cross improvement state (stream plasticity is big).
Further, improvement dregs is that foam improves dregs.
Inventor is found to have the dregs of good stream plasticity often in top shape during carrying out slump consistancy test
At the platform of certain diameter；In addition, it is contemplated that slump consistancy test is the characterization to improvement dregs overall flow characteristic, therefore, this
Invention combines slump value h, extension angle value D, top diameter d these three parameters, an overall target F is proposed, by comprehensive
Index F value is closed to evaluate the stream plastic behavior of improvement dregs, with existing sediment improvement evaluation method (according to the slump of improvement dregs
Angle value or extension angle value are evaluated) it compares, the evaluation result of the evaluation method is more rationally and accurate, can be referred to by synthesis
F value evaluation foam improvement dregs state (suitable improvement owes improvement, crosses and improve) is marked, there is better feasibility and higher is pushed away
Wide value.
Detailed description of the invention
Fig. 1 is that foam improves dregs slump consistancy test schematic diagram；
Fig. 2 properly improves working condition chart；
Fig. 3 F value result summary view；
Wherein: the dregs after 1- slump；2- slump cylinder.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of shield improvement dregs liquid-plastic state evaluation method based on slump consistancy test, includes the following steps:
1) it prepares foam and improves dregs, and slump consistancy test is carried out to improvement dregs, label 1 indicates after collapsing in Fig. 1
Dregs, label 2 indicate slump cylinder.
This example material therefor is circle gravel soil, and specific operating condition of test is as shown in table 1.
1 slump consistancy test operating condition of table
2) slump value h, extension angle value D and top diameter d after improvement dregs collapses are measured and record, wherein d takes
Value is divided into three kinds of situations according to dregs state:
1. improveing does not have platform at the top of dregs, mobility, plasticity are poor (dregs is in loose state), and d value is taken as 0 at this time；
2. improveing does not have platform at the top of dregs, more liquid (dregs is in adhesive aggregation state), at this time d value and extension angle value D phase
Deng；
Platform is formed at the top of dregs 3. improveing, d value is taken as platform diameter at this time.
3) slump h of comprehensive improvement dregs, extensibility D and top diameter d this " three norms ", by formula F=
(D-d)/h calculates overall target F value.
4) sediment improvement situation is evaluated according to overall target F value: when F ∈ [0,1], suitable (the stream modeling of sediment improvement state
Property is good)；As F > 1, dregs is in improvement state of owing (it is poor loosely, to flow plasticity)；As F=0, dregs was in improvement shape
State (stream plasticity is big).
According to slump consistancy test as a result, available five groups are properly improved parameter as shown in Fig. 2 warning triangle.
It carries out slump consistancy test parameters obtained that overall target F Distribution value is calculated as shown in figure 3, determining by F value
Five groups properly improve operating condition and be consistent with actual conditions.
It is commented by combining the F value that slump value h, extension angle value D, top diameter d this " three big parameters " are calculated
The new method that valence foam improves dregs stream mecystasis is reasonable, accurate more with feasibility and promotional value.
Above-described embodiment is only to clearly demonstrate examples made by the present invention, rather than the restriction to embodiment.For
For those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.Here without can not be also exhaustive to all embodiments.And the obvious variation or change thus amplified out
It is dynamic to be still in the protection scope of this invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300483.1A CN109580425B (en) | 2018-11-02 | 2018-11-02 | A method for evaluating the flow plastic state of shield-modified slag based on slump test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300483.1A CN109580425B (en) | 2018-11-02 | 2018-11-02 | A method for evaluating the flow plastic state of shield-modified slag based on slump test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109580425A true CN109580425A (en) | 2019-04-05 |
| CN109580425B CN109580425B (en) | 2021-11-05 |
Family
ID=65921460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811300483.1A Active CN109580425B (en) | 2018-11-02 | 2018-11-02 | A method for evaluating the flow plastic state of shield-modified slag based on slump test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109580425B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115683942A (en) * | 2022-08-09 | 2023-02-03 | 中南大学 | An automatic evaluation method for flow-plasticity of shield tunneling residue based on the cross-sectional shape of the sample collapsed body |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008640A (en) * | 2007-02-02 | 2007-08-01 | 中南大学 | Integrated device for measurement and evaluation of workability of self-compacting concrete |
| CN102359925A (en) * | 2011-07-14 | 2012-02-22 | 北京工业大学 | Complete earth pressure balance shield construction soil mass improvement test method |
| CN103604723A (en) * | 2013-11-18 | 2014-02-26 | 湖北工业大学 | Device and method for detecting slow release performance of concrete slump retaining agent |
| CN104453923A (en) * | 2014-10-21 | 2015-03-25 | 中南大学 | Selection method for earth pressure balance shield muck improvement parameters of viscous formation adopting foam as additive |
| CN204855304U (en) * | 2015-07-27 | 2015-12-09 | 中国建筑第八工程局有限公司 | Self -compaction concrete slump divergence testing arrangement |
| CN206557044U (en) * | 2017-03-02 | 2017-10-13 | 田伟峰 | A kind of detection means of concrete slump and divergence |
| CN207114364U (en) * | 2017-07-07 | 2018-03-16 | 浙江交工路桥建设有限公司 | A kind of detection means of slump and divergence |
-
2018
- 2018-11-02 CN CN201811300483.1A patent/CN109580425B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008640A (en) * | 2007-02-02 | 2007-08-01 | 中南大学 | Integrated device for measurement and evaluation of workability of self-compacting concrete |
| CN102359925A (en) * | 2011-07-14 | 2012-02-22 | 北京工业大学 | Complete earth pressure balance shield construction soil mass improvement test method |
| CN103604723A (en) * | 2013-11-18 | 2014-02-26 | 湖北工业大学 | Device and method for detecting slow release performance of concrete slump retaining agent |
| CN104453923A (en) * | 2014-10-21 | 2015-03-25 | 中南大学 | Selection method for earth pressure balance shield muck improvement parameters of viscous formation adopting foam as additive |
| CN204855304U (en) * | 2015-07-27 | 2015-12-09 | 中国建筑第八工程局有限公司 | Self -compaction concrete slump divergence testing arrangement |
| CN206557044U (en) * | 2017-03-02 | 2017-10-13 | 田伟峰 | A kind of detection means of concrete slump and divergence |
| CN207114364U (en) * | 2017-07-07 | 2018-03-16 | 浙江交工路桥建设有限公司 | A kind of detection means of slump and divergence |
Non-Patent Citations (1)
| Title |
|---|
| 龚景齐 等: "天津信达广场混凝土实体质量检测", 《第八届全国建设工程无损检测技术学术会议论文》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115683942A (en) * | 2022-08-09 | 2023-02-03 | 中南大学 | An automatic evaluation method for flow-plasticity of shield tunneling residue based on the cross-sectional shape of the sample collapsed body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109580425B (en) | 2021-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106157181B (en) | A method for rapid real-time classification of soil surrounding rock based on parameters while drilling | |
| CN103616287B (en) | A kind of tunnel excavation indoor model test device | |
| Qing-biao et al. | The rheological test and application research of glass fiber cement slurry based on plugging mechanism of dynamic water grouting | |
| CN104453923B (en) | A kind of take foam as the choosing method of the gummy formation earth pressure balanced shield, EPBS sediment improvement parameter of additive | |
| CN104007045B (en) | A Numerical Simulation Method of Slurry Film Formation in Slurry Shield Machine | |
| CN104895595B (en) | A Method for Determining the Diffusion Range and Regularity of Grouting Fluid During Bolt Grouting | |
| CN105181435A (en) | Method of establishing elastic-plastic mechanical constitutive model made of rock material | |
| Liu et al. | Model test study on spatial deformation law of surrounding rock for super-large section and shallow buried tunnels | |
| CN107391778B (en) | An Analytical Calculation Method of Seepage Flow in Circular Tunnel | |
| Pham et al. | Stability of slope and seepage analysis in earth dam using numerical finite element model | |
| CN109580425A (en) | A kind of shield improvement dregs liquid-plastic state evaluation method based on slump consistancy test | |
| CN112851225B (en) | A kind of environmental protection treatment method of silty clay in shield synchronous grouting | |
| CN114186502B (en) | Construction method of paste tube conveying path resistance loss calculation model considering boundary layer effect | |
| Chen et al. | Investigating the characteristics of wet shotcrete pipeline transportation | |
| CN203658036U (en) | Shield hob test bench | |
| Shao et al. | Stability Analysis of a Water Diversion Tunnel in Fractured Surrounding Rock via 3D-Printed Large-Scale Model Tests | |
| CN106228001B (en) | The subregion appraisal procedure that shield tunnel construction impacts safety of surrounding environment | |
| CN202748274U (en) | Shearing instrument | |
| CN206291906U (en) | A kind of portable location instrument | |
| CN107035359B (en) | A kind of mud cake solidification strength evaluation method and mud cake solidification strength detection device | |
| CN204327110U (en) | Talus section tunnel, landslide reinforcement structure | |
| CN115630462A (en) | Rock mass permeability coefficient calculation method based on seepage-stress coupling high-pressure water pressure test | |
| CN108959189A (en) | A method of it calculating Canal in Loess Area roadbed and underlies dark cave marginal stability | |
| CN103439467B (en) | A kind of measuring method of crack propagation inclination angle of crown site of tubular joint of steel tube | |
| CN109403942A (en) | A kind of method of slippery water and glue mixing ratio in determining shale gas well FRACTURING DESIGN |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |