CN110309520A - A kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water - Google Patents
A kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water Download PDFInfo
- Publication number
- CN110309520A CN110309520A CN201810257296.3A CN201810257296A CN110309520A CN 110309520 A CN110309520 A CN 110309520A CN 201810257296 A CN201810257296 A CN 201810257296A CN 110309520 A CN110309520 A CN 110309520A
- Authority
- CN
- China
- Prior art keywords
- well
- partially
- penetrated
- amplification coefficient
- stratum
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention provides the calculation method and its application of a kind of stratum partially-penetrated well effective reinforcing depth of diving under water, and method includes: to establish complete penetration of well single well flow calculation formula；Establish partially-penetrated well flow rate calculation formula；By the complete penetration of well single well flow and partially-penetrated well equivalent flow.Ignore what effective reinforcing depth in foundation pit distinguished with the prior art, the present invention obtains effective reinforcing depth in foundation pit by the method for establishing complete penetration of well single well flow calculation formula and partially-penetrated well flow rate calculation formula Equivalent Calculation, which can obviously increase the dropdown curve fitting precision outside diving stratum partially-penetrated well foundation pit.
Description
Technical field
The present invention relates to base pit dewatering measurements.More particularly, to a kind of diving stratum partially-penetrated well effective reinforcing depth
Calculation method and its application.
Background technique
Currently, calculation of ground surface settlement method caused by diving stratum base pit dewatering has JGJ 120-2012 " building foundation pit branch
Protect regulation ", JSJ 311-2013 " deep foundation pit of construction engineering construction safety technical specification " and SJG 05-2011 " Shenzhen's depth base
Cheat support technology specification " etc. method for normalizing, these methods it is equal based on being settled caused by layerwise summation method Rainfall Estimation.Specification side
Method calculation formula is simple, but is not providing the clear calculation formula of the drawdown apart from dewatering well any position.
The calculating for applying to the outer precipitation ground settlement of foundation pit mostly in the prior art, for precipitation in foundation pit, due to ignoring
Therefore imperfect precipitation effective reinforcing depth, calculates the influence for cheating outer ground settlement using calculation method in the prior art
The result arrived and actual error are larger.
In view of this, it is desirable to provide a kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water.
Summary of the invention
It is an object of the present invention to provide a kind of calculation methods of stratum partially-penetrated well effective reinforcing depth of diving under water.
It is another object of the present invention to provide a kind of calculation methods of stratum partially-penetrated well effective reinforcing depth of diving under water
Application.
In order to achieve the above objectives, the present invention adopts the following technical solutions:
A kind of calculation method for stratum partially-penetrated well effective reinforcing depth of diving under water, comprising:
S1, complete penetration of well single well flow calculation formula is established:
S2, partially-penetrated well flow rate calculation formula is established:
S3, by the complete penetration of well single well flow and partially-penetrated well equivalent flow, QIt is imperfect=QCompletely,
sW is imperfect=sW is complete, diving stratum partially-penetrated well effective reinforcing depth H is calculated using Matlab software0。
Preferably, when the method calculates partially-penetrated well effective reinforcing depth in foundation pit, the H0Value be utilize
H is calculated in Matlab software0Value and amplification coefficient product.
Preferably, the amplification coefficient is obtained according to individual well and twin-well precipitation by test, and the amplification coefficient is
1.18 with 1.32.
Preferably, when single sinking, the amplification coefficient is 1.18；
When twin-well precipitation, the amplification coefficient is 1.32.
The present invention also provides a kind of applications of the calculation method of stratum partially-penetrated well effective reinforcing depth of diving under water, using described
Stratum partially-penetrated well effective reinforcing depth of diving under water divides the diving stratum partially-penetrated well area foundation pit Nei Raoshen and the area Fei Raoshen, described
The step of division includes:
S1, the dropdown curve being fitted by experimental data processing:
H in formulaaExpression is calculated using Matlab software
H0Value and amplification coefficient product；
S2, second order derivation is carried out to the fitting dropdown curve, obtained:
S3, corresponding x value when seeking h "=0, obtain inflection point at a distance from barricade
In dropdown curve, the region before inflection point is that the region after infiltration area, inflection point is the area Fei Raoshen.
Preferably, the amplification coefficient is obtained according to individual well and twin-well precipitation by test, and the amplification coefficient is
1.18 with 1.32.
Preferably, when single sinking, the amplification coefficient is 1.18；
When twin-well precipitation, the amplification coefficient is 1.32.
Beneficial effects of the present invention are as follows:
The present invention provides a kind of calculation method of stratum partially-penetrated well effective reinforcing depth of diving under water, and ignores base with the prior art
Effective reinforcing depth distinguishes in cheating, and the present invention is by establishing complete penetration of well single well flow calculation formula and partially-penetrated well flowmeter
The method for calculating formula Equivalent Calculation obtains effective reinforcing depth in foundation pit, which can obviously increase diving stratum
Dropdown curve fitting precision outside partially-penetrated well foundation pit.
In a preferred embodiment of the invention, new have by what effective reinforcing depth was multiplied with amplification coefficient
Influence depth is imitated, which can obviously increase the dropdown curve fitting in diving stratum partially-penetrated well foundation pit
Precision.
In addition, the present invention also provides the application using the above method, in the way of to dropdown curve progress second order derivation
The area foundation pit Nei Raoshen and the area Fei Raoshen are distinguished, so as to further increase the applicability and precision of dropdown curve.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows the calculation method flow chart of present invention diving stratum partially-penetrated well effective reinforcing depth.
Fig. 2 shows the applicating flow charts of the calculation method of diving stratum partially-penetrated well effective reinforcing depth.
Fig. 3 shows the floor plan of test model of the present invention.
Fig. 4 shows one of section layout drawing of test model of the present invention.
Fig. 5 shows the two of the section layout drawing of test model of the present invention.
Fig. 6 show buried depth be 0.07m when, gravelly clay stratum of the present invention dropdown curve.
Fig. 7 show buried depth be 0.22m when, gravelly clay stratum of the present invention dropdown curve.
Fig. 8 show buried depth be 0.37m when, gravelly clay stratum of the present invention dropdown curve.
Fig. 9 show buried depth be 0.52m when, gravelly clay stratum of the present invention dropdown curve.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
In embodiments of the present invention, H is the aqueous thickness of soil layer before precipitation, hwApart from barricade outside foundation pit after stablizing for precipitation
The most nearby aqueous thickness (h of soil layerwSoil layer drawdown s can be subtracted by aqueous thickness H before the soil layer precipitationwObtain), HaFor base
Partially-penetrated well effective reinforcing depth in cheating；S is dewatering well at a distance from barricade；α is correction factor；X is indicated outside foundation pit and barricade
Different distance；rwFor dewatering well radius；K is soil layer infiltration coefficient；L is dewatering well filter length；QCompletelyAnd QIt is imperfectIt indicates
Respectively indicate complete well yield and partially-penetrated well flow.
Embodiment 1
The present invention provides a kind of calculation method of stratum partially-penetrated well effective reinforcing depth of diving under water, as shown in Figure 1, comprising:
S1, complete penetration of well single well flow calculation formula is established:
S2, partially-penetrated well flow rate calculation formula is established:
S3, by the complete penetration of well single well flow and partially-penetrated well equivalent flow, QIt is imperfect=QCompletely,
sW is imperfect=sW is complete, diving stratum partially-penetrated well effective reinforcing depth H is calculated using Matlab software0。
Certainly, it is known in the art that the symbol of each parameter may be derived from standard literature in the art in formula.
Optionally, effective reinforcing depth can be suitable in foundation pit and outside foundation pit, likewise, effective reinforcing depth can fit
For individual well and twin-well.
It can get corresponding Comparative result by following tests, test such as Fig. 1-3:
Partially-penetrated well dewatering model test floor plan and sectional view are as depicted in figs. 1 and 2 in foundation pit, in master in Fig. 1
Foundation pit enclosing and dewatering well lean on intermediate arrangement in body chamber, it is ensured that water supply tank carries out stablizing moisturizing other than the radius of influence.
Test is carried out on the similar stratum of selection gravelly clay stratum similar with completely weathered granite respectively, opens to ignore foundation pit
Dig the influence to water level in stratum, the Precipitation Process before testing equal simulating excavation.With the similar stratum precipitation of gravelly clay
For test, test process is as follows:
The gravelly clay soil sample that preparatory proportion is completed with spade by manually slowly being spread in cabinet.Every laying when filling
10cm earth formation material, carries out stratum compacting at once, and the number and tamping force similarity model test of every square metre of compacting tamp feelings
Condition is consistent, to guarantee that the physical parameter of soil layer is stablized.Whenever filling test apparatus, foundation pit enclosure structure and the embedding depth of downcomer
When spending, bottom drainpipe is all connected to eminence water tank, is filled the water by eminence water tank into chamber, waterflood injection rate can pass through case
Bottom drain pipe port valve is adjusted, and guarantees that flow velocity is steady, is not easy too fast, is saturated soil layer from bottom to top, meeting after saturation in soil layer
Certain sedimentation and deformation is generated, needs to continue to insert soil sample to height is required, it, can after 1~2 saturation fills out process with benefit
It is monitored instrument and soil sample to continue to load, until be filled to test requirements document height 1.1m.In chamber four when soil consolidation
All water tanks and main body case keep the water level of 1.1m high, and stratum consolidates under Gravitative Loads, to model casing surface settlement observation point
Displacement meter reading be less than 0.001mm/d show that the consolidation of soil layer has been completed substantially, before model test has reached construction at this time
Original state, have well pumping test condition.Test predominantly determines drawdown and draws water, for water level in dewatering well in guarantee Precipitation Process
It is always drawdown needed for testing, is intended to drinking-water pipe head being fixed on 5#, 1# and 1# and 3# dewatering well before each well pumping test
Interior specified precipitation depth (0.1m, 0.2m, 0.3m, 0.4m, 0.5m) obtains gravelly clay and completely decomposed flower hilllock by test
Change before layer 5#, 1# and 1# as lithofacies and 3# dewatering well difference drawdown precipitation with pore water pressure of the precipitation after stable.Table
1-3 is that the data result of this test compares:
1 effective reinforcing depth the calculated results of table
2 gravelly clay of table similarly shelf theory and comparison of test results
3 completely weathered granite of table similarly shelf theory and comparison of test results
Obviously, calculation method of the invention is more suitable for the calculating of the outer partially-penetrated well effective reinforcing depth of foundation pit.
It is therefore preferred that in for foundation pit when the calculating of partially-penetrated well effective reinforcing depth, need to multiplied by amplification coefficient,
The amplification coefficient is obtained according to individual well and twin-well precipitation by test, and the amplification coefficient is 1.18 and 1.32.
Optionally, when single sinking, the amplification coefficient is 1.18；When twin-well precipitation, the amplification coefficient is
1.32.Practical subway station is thin-and-long mostly, dewatering well apart from long side ground-connecting-wall mostly within the scope of 5m, i.e. model test
0.1m range, and be in the width direction mostly individual well or twin-well precipitation in foundation pit, therefore obtained amplification coefficient meets actual needs.
Embodiment 2
The present embodiment is the verification test to effective reinforcing depth, designs to obtain diving stratum by well pumping test in foundation pit
Precipitation causes the outer dropdown curve of foundation pit in foundation pit；Bring effective reinforcing depth into dropdown curve and using Matlab software to precipitation
Curve is fitted, and is obtained precipitation in diving stratum foundation pit and is caused the outer dropdown curve fitting formula of foundation pit, the fitting formula are as follows:
As a result as shown in Fig. 6-Fig. 9, test is proved, using the accuracy for the fitting dropdown curve that effective reinforcing depth obtains
Height can adapt to existing engineering demand.
Embodiment 3
In practice, exist due to the presence of barricade, outside foundation pit around seeping Qu Hefei around seeping area, but in the prior art for around
It seeps Qu Hefei to obtain around the main or specific data according to test model of the differentiation for seeping area, error is larger.It therefore, can will be around
Seep Qu Hefei around seep area accurately distinguish, thus obtain around seep area into exact extension.
Therefore, the present invention also provides a kind of applications of the calculation method of stratum partially-penetrated well effective reinforcing depth of diving under water.Such as
Dropdown curve known to Fig. 6-Fig. 9 is " first recessed convex again " form, and the recessed portion of curve is around the main influence area of infiltration, song
The convex part of line is smaller by being influenced around infiltration, therefore thinks that the recessed portion region of dropdown curve is around infiltration area, convex partial region
For the area Fei Raoshen, to become convex corner position be around seeping Qu Hefei around the division limits for seeping area to curve from recessed, it is seen that is asked
The position of inflection point can be marked off around infiltration Qu Hefei around infiltration area out.It is drawn using diving stratum partially-penetrated well effective reinforcing depth
Divide the diving stratum partially-penetrated well area foundation pit Nei Raoshen and the area Fei Raoshen, as shown in Fig. 2, the step of division includes:
S1, the dropdown curve being fitted by experimental data processing:
H in formulaaExpression is calculated using Matlab software
H0Value and amplification coefficient product；
S2, second order derivation is carried out to the fitting dropdown curve, obtained:
S3, corresponding x value when seeking h "=0, obtain inflection point at a distance from barricade
In dropdown curve, the region before inflection point is that the region after infiltration area, inflection point is the area Fei Raoshen.
Certainly, same as Example 1, the amplification coefficient is obtained according to individual well and twin-well precipitation by test, described
Amplification coefficient is 1.18 and 1.32.
Optionally, when single sinking, the amplification coefficient is 1.18；When twin-well precipitation, the amplification coefficient is
1.32。
The test of verifying, this implementation are provided in the present embodiment around method of the Qu Hefei around infiltration area is seeped for above-mentioned division
For example chooses gravelly clay stratum dropdown curve, as Figure 6-9, calculates resulting dropdown curve corner position and be in
It tests within the scope of inflection point, illustrates that theoretical method can more accurately divide the area Keng Wairaoshen and the area Fei Raoshen, to foundation pit construction and prison
Measuring tool has directive significance.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (7)
1. a kind of calculation method for stratum partially-penetrated well effective reinforcing depth of diving under water characterized by comprising
S1, complete penetration of well single well flow calculation formula is established:
S2, partially-penetrated well flow rate calculation formula is established:
S3, by the complete penetration of well single well flow and partially-penetrated well equivalent flow, QIt is imperfect=QCompletely, sW is imperfect=sW is complete, utilize Matlab
Diving stratum partially-penetrated well effective reinforcing depth H is calculated in software0。
2. method according to claim 1, which is characterized in that effectively influence depth when the method calculates partially-penetrated well in foundation pit
When spending, the H0Value be using Matlab software H to be calculated0Value and amplification coefficient product.
3. method according to claim 2, which is characterized in that the amplification coefficient passes through test according to individual well and twin-well precipitation
It obtains, the amplification coefficient is 1.18 and 1.32.
4. method according to claim 3, which is characterized in that
When single sinking, the amplification coefficient is 1.18；
When twin-well precipitation, the amplification coefficient is 1.32.
5. a kind of application method of the calculation method for stratum partially-penetrated well effective reinforcing depth of diving under water, which is characterized in that utilize institute
It states diving stratum partially-penetrated well effective reinforcing depth and divides the diving stratum partially-penetrated well area foundation pit Nei Raoshen and the area Fei Raoshen, institute
The step of stating division include:
S1, the dropdown curve being fitted by experimental data processing:
H in formulaaIt indicates that H is calculated using Matlab software0's
The product of value and amplification coefficient；
S2, second order derivation is carried out to the fitting dropdown curve, obtained:
S3, corresponding x value when seeking h "=0, obtain inflection point at a distance from barricade
In dropdown curve, the region before inflection point is that the region after infiltration area, inflection point is the area Fei Raoshen.
6. method according to claim 5, which is characterized in that the amplification coefficient passes through test according to individual well and twin-well precipitation
It obtains, the amplification coefficient is 1.18 and 1.32.
7. method according to claim 6, which is characterized in that
When single sinking, the amplification coefficient is 1.18；
When twin-well precipitation, the amplification coefficient is 1.32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257296.3A CN110309520A (en) | 2018-03-27 | 2018-03-27 | A kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257296.3A CN110309520A (en) | 2018-03-27 | 2018-03-27 | A kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110309520A true CN110309520A (en) | 2019-10-08 |
Family
ID=68074225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810257296.3A Pending CN110309520A (en) | 2018-03-27 | 2018-03-27 | A kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110309520A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202980A (en) * | 2016-08-24 | 2016-12-07 | 山西省交通科学研究院 | A kind of swelled ground is humidified under Condition of Rainfall Infiltration and expands method for numerical simulation |
| CN107023013A (en) * | 2017-06-04 | 2017-08-08 | 中国建筑第七工程局有限公司 | A kind of green precipitation method for making full use of hydrogeological characteristic |
| CN107219529A (en) * | 2017-06-07 | 2017-09-29 | 国家深海基地管理中心 | The acquisition methods and system of a kind of high-precision seafloor topography figure |
| US9846251B2 (en) * | 2016-04-27 | 2017-12-19 | James Brewster Fink | Electro-hydro-dynamic identification of a subsurface fluid flow |
-
2018
- 2018-03-27 CN CN201810257296.3A patent/CN110309520A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9846251B2 (en) * | 2016-04-27 | 2017-12-19 | James Brewster Fink | Electro-hydro-dynamic identification of a subsurface fluid flow |
| CN106202980A (en) * | 2016-08-24 | 2016-12-07 | 山西省交通科学研究院 | A kind of swelled ground is humidified under Condition of Rainfall Infiltration and expands method for numerical simulation |
| CN107023013A (en) * | 2017-06-04 | 2017-08-08 | 中国建筑第七工程局有限公司 | A kind of green precipitation method for making full use of hydrogeological characteristic |
| CN107219529A (en) * | 2017-06-07 | 2017-09-29 | 国家深海基地管理中心 | The acquisition methods and system of a kind of high-precision seafloor topography figure |
Non-Patent Citations (2)
| Title |
|---|
| 刘俊龙: "潜水含水层中的非完整井降水设计计算探讨", 《岩土工程技术》 * |
| 杨清源 等: "潜水层基坑降水引起地表沉降试验与理论研究", 《岩石力学与工程学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Investigation of steady water inflow into a subsea grouted tunnel | |
| CN104196034B (en) | A kind of utilize steel sheet pile as the foundation ditch construction method in supporting cofferdam | |
| CN107489424B (en) | A kind of predictor method that shield subway work induces stratum deformation and influences on ancient building | |
| CN100516380C (en) | Method for lowering water by combining phreatic water in footing groove with artesian aquifer - well stratifications | |
| CN108090291B (en) | Calculation method for predicting water inflow of confined water suspended curtain foundation pit | |
| CN107587516B (en) | A kind of efficient sealing resistance sand precipitation composite system of Follow-up type and its construction method | |
| CN104652448B (en) | A kind of Pit imbalance support design method | |
| CN104632079B (en) | Method for determining pre-target displacement of three-dimension horizontal well hole trajectory | |
| CN106337426A (en) | Dewatering method used for improving surging-resisting stability of confined water stratum foundation pit | |
| CN103290836B (en) | Vacuum decompression compacting and consolidating construction method for soft foundation treatment | |
| CN110321576A (en) | Partially-penetrated well precipitation makes the outer earth's surface settlement calculation method of foundation pit in diving stratum foundation pit | |
| CN110093941A (en) | Deep foundation pit precipitation construction method | |
| CN104533519B (en) | Management method for water burst water disasters in event of vertical shaft wellbore passing through strong water-containing thick rock layer | |
| CN109359373A (en) | A method of prediction artesian aquifer Dewatering by pressure reduction causes ground settlement | |
| CN115408886B (en) | Water lowering and draining system and method for controlling underground structure settlement through hydraulic engineering | |
| CN108643246B (en) | The prediction technique that artesian water precipitation influences surrounding enviroment in foundation pit construction | |
| CN106149673A (en) | Soak heavy-tamping method in advance in collapsible loess deep | |
| CN108532617B (en) | Heterogeneous water table aquifer suspended cutoff foundation pit determines water level and draws water method for determination of amount | |
| CN107908901B (en) | Method for calculating influence of confined water precipitation on surrounding environment in foundation pit construction | |
| CN114372314A (en) | Method for predicting ground settlement caused by pressure reduction and precipitation | |
| Rondonuwu et al. | Prediction of the stress state and deformation of soil deposit under vacuum pressure | |
| Shi et al. | Optimal design and dynamic control of construction dewatering with the consideration of dewatering process | |
| CN106354911B (en) | Pre- thin drop safety level determines method before a kind of top plate water-bearing layer is adopted | |
| Hwang et al. | Deflection paths and reference envelopes for diaphragm walls in the Taipei Basin | |
| CN110309520A (en) | A kind of calculation method and its application of stratum partially-penetrated well effective reinforcing depth of diving under water |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191008 |
|
| WD01 | Invention patent application deemed withdrawn after publication |