CN108797558A - A kind of soft-soil foundation treatment method by controlling secondary consolidation settlement - Google Patents
A kind of soft-soil foundation treatment method by controlling secondary consolidation settlement Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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Abstract
The soft-soil foundation treatment method that the invention discloses a kind of by controlling secondary consolidation settlement carries out discharging consolidation+preloading processing to soft soil foundation, unloads backfill Ultra-Light Material EPS after the expired foot of precompressed and fill pavement structure；Before basement process design, geological prospecting obtains undisturbed soil sample simultaneously, carries out the conventional secondary consolidation experiment of series and overconsolidated soil secondary consolidation experiment, obtains the parameters in series or curve of design；When basement process designs, other than carrying out the calculating of conventional stabilization and total settlement, secondary consolidation settlement calculating is also carried out, the requirement according to concrete engineering to ground settlement after construction be designed to the thickness for backfilling Ultra-Light Material.The method of the present invention can make soft clay be converted into overconsolidated soil, to reduce the secondary consolidation coefficient of weak soil, reduce the secondary consolidation settlement amount of Soft Soil Layer, achieve the purpose that control structure settlement after construction.
Description
Technical field
The invention belongs to Geotechnical Engineering fields, and in particular at a kind of soft soil foundation by controlling secondary consolidation settlement
Reason method.
Background technology
Weak soil is also referred to as bury, is the abbreviation of weak cohesive soil, it is formed in Late Quaternary, belong to marine facies, lagoon facies,
River valley phase, liminetic facies, drowned valley phase, delta equal adherent deposit or river drift, under being distributed in coastal, river more
Trip or lake are in the neighbourhood.Common weak cohesive soil is mud and muck soil, soft clay foundation low bearing capacity, gain in strength
Slowly, yielding and uneven after loading, rate of deformation is big and stabilization time is long, has small permeability, thixotropy and rheological characteristic
Big feature.Common soft-soil foundation treatment method has preloading method, displacement method, paddling process etc., and bury is under load action
Intensity can increase, and saturated soft clay foundation is under outer load action with the dissipation of pore water pressure and the consolidation of soil layer, soil
Shearing strength will also increase.
With the development of economic construction of China and coastal area, large-scale construction project is constantly carried out, and is related to the work of weak soil
Journey is more and more, and quantities is increasing, less becomes one by the soft soil foundation secondary consolidation settlement that engineering circles are paid attention in the past
The problem of must paying attention to.Weak soil secondary consolidation settlement is often referred to after the completion of primary consolidation, under constant effective stress effect the soil body by
The TERM DEFORMATION caused by soil skeleton creep, i.e. ground are undergone for a long time under outside charge function, excess pore water pressure in the soil body
It dissipates, in the case that effective stress is constant, is settled caused by the solid skeletal slow creep for a long time by soil, generally completely
The numerical value very little of secondary consolidation settlement in soil, but for the thick-layer bury containing organic matter, it is very important.
Construction time safety and stabilization tend to be effectively guaranteed in engineering practice at present, but settlement after construction generated
Big phenomenon is still commonly present, the main reason is that decrement is excessive after secondary consolidation decrement is excessive or auger ground work leads to work
After settle it is excessive, cause pavement cracking, bumping at bridge-head, construction cracking or tilt situations such as occur.
In order to control the secondary consolidation settlement (settlement after construction) of soft soil foundation, generally use discharging consolidation+overload is pre- in engineering
The method of pressure controls secondary consolidation settlement amount by increasing prefabricating load or extending squeeze time, but this method is usually adopted
Total settlement and settlement amount after construction are calculated with empirical coefficient method, weak soil secondary consolidation experiment is not carried out and secondary consolidation settlement calculates,
The settlement after construction of Practical Project and calculated value is caused to differ larger, settlement after construction cannot control；Overload capacity is steady by ground simultaneously
Fixed limitation, surcharge ratio is often smaller (being usually no more than 1.3), and effect is less notable.
Currently, being continuously improved for the soft-soil foundation treatment method of prepressing water discharge consolidation, such as Publication No. CN106049413
Chinese patent technology by heavy-tamping method by pore water through vacuum drainage structure be discharged；The Chinese patent technology of CN104110025
It is combined with plastic draining board using weak soil internal pipeline, is discharged it using vacuum pump drainage pore water；Publication No.
The Chinese patent technology of CN107916662 accelerates Soft Soil Consolidation drainage rates by subregion layering etc., simplifies construction work
Sequence；The Chinese patent technology of Publication No. CN107916662 by reinforcement, pouring into mud etc., a series of construction methods controls time are solid
Knot sedimentation.Although these methods make prepressing water discharge effect be continuously improved, secondary consolidation settlement is reduced to a certain extent, it
Quantified controlling is not carried out to secondary consolidation settlement, actual effect is notable.
Invention content
It, can be over the ground in view of soft-soil foundation treatment method above-mentioned, that the present invention provides a kind of by controlling secondary consolidation settlement
The different of base settlement after construction require to carry out Quantitative design.
A kind of soft-soil foundation treatment method by controlling secondary consolidation settlement is calculated normally by undisturbed soil laboratory test
The settlement amount after construction of soft soil foundation under concretion state is adopted if it is more than settlement after construction requirement of the Practical Project to soft soil foundation
Soft soil foundation is handled with overconsolidation method, the overconsolidation method carries out discharging consolidation+preloading to soft soil foundation
It handles, light material is unloaded and backfill after the expired foot of precompressed and fills pavement structure (or the structures such as dykes and dams).Overconsolidation method
Soft clay can be made to be converted into overconsolidated soil, to reduce the secondary consolidation coefficient of weak soil, reduce the secondary consolidation settlement amount of Soft Soil Layer, reach
To the purpose of control structure settlement after construction.
Further, described that soft soil foundation settlement amount after construction under normal consolidation state is calculated by undisturbed soil laboratory test
Detailed process is：Geological prospecting is carried out in Engineering Zone and obtain original state weak soil soil sample using thin-wall sampler first；Then will
Collected soil sample is made sample and carries out one-dimensional secondary consolidation experiment and conventional soil test under normal consolidation state, obtains soft
The undisturbed soil secondary consolidation coefficient of each soil layer of soil base and conventional geological parameter；Finally calculated according to undisturbed soil secondary consolidation coefficient
The secondary consolidation settlement amount of each soil layer, and then the secondary consolidation settlement amount of each soil layer is added up and obtains weak soil under normal consolidation state
The settlement amount after construction of ground, while calculating the primary consolidation settlement of soft soil foundation.It, in this way can be accurate by undisturbed soil laboratory test
Ground obtains the secondary consolidation coefficient of weak soil and conventional geological parameter, accurately to estimate secondary consolidation settlement amount and primary consolidation sedimentation
Amount.
It, will also be into places other than carrying out conventional primary consolidation settlement calculating and stability Calculation when basement process designs
Consolidation settlement calculates, and the requirement according to concrete engineering to ground settlement after construction set to the thickness for backfilling Ultra-Light Material
Meter.
Further, it is calculated by the following formula the undisturbed soil secondary consolidation coefficient for obtaining each soil layer：
Wherein：For the undisturbed soil secondary consolidation coefficient C of any soil layerα, t1~t2For secondary consolidation the beginning and the end selected in experiment
Time, e1And e2Respectively the soil layer is in secondary consolidation the beginning and the end time corresponding secondary consolidation void ratio.
Further, it is calculated by the following formula the secondary consolidation settlement amount of each soil layer：
Wherein：Secondary consolidation settlement amount s, H for any soil layer are the thickness of the layer, CαFor the undisturbed soil of the soil layer
The coefficient of consolidation, t1~t2For secondary consolidation the beginning and the end time selected in experiment, e0The hole of soil layer when reaching 100% for the degree of consolidation
Gap ratio.
Further, the overconsolidation method carries out piling prepressing to soft soil foundation, is pre-stressed to ground consolidation degree and reaches 100%
When unload and backfill light material, the filling-up thickness of light material is required to determine by Practical Project to soft soil foundation settlement after construction.
When the ground degree of consolidation reaches 100%, ground settlement amount after construction is equal to secondary consolidation settlement amount.
Further, using overconsolidation method to determining light material by following steps in Soft Ground design process
Filling-up thickness：
(1) sample is made in weak soil soil sample and carries out one-dimensional secondary consolidation experiment under different overconsolidation states, fitted soft
The each soil layer secondary consolidation coefficient of soil base with overconsolidation ratio change curve；
(2) multigroup different surcharge ratio is chosen, calculates each soil layer before and after different surcharge ratio loads depress unloading in advance
Additional stress and weight stress, and calculate according to additional stress and weight stress the overconsolidation of each soil layer under different surcharge ratios
Than；
(3) according to each soil layer secondary consolidation coefficient with the change curve of overconsolidation ratio, each soil under different surcharge ratios is determined
The secondary consolidation coefficient of layer, and then the secondary consolidation settlement amount of each soil layer under different surcharge ratios is calculated according to secondary consolidation coefficient, and
The secondary consolidation settlement amount of each soil layer is added up and obtains the settlement amount after construction of soft soil foundation under different surcharge ratios；
(4) change curve of the soft soil foundation settlement amount after construction with surcharge ratio is drawn out, and to weak soil according to Practical Project
The settlement after construction of base requires to choose corresponding surcharge ratio, and then is calculated according to selected surcharge ratio and determine filling for light material
Thickness.
Further, the overconsolidation ratio of each soil layer under different surcharge ratios is calculated by the following formula in the step (2)：
Wherein：For the overconsolidation ratio OCR, σ of any soil layer i under any surcharge ratio OCL0It is soil layer i at surcharge ratio OCL
Weight stress, σ1For additional stresses of the soil layer i at surcharge ratio OCL, σ after load2It is soil layer i after unloading at surcharge ratio OCL
Additional stress.
Further, the filling-up thickness of light material is calculated by the following formula in the step (4)：
Wherein：H is filling-up thickness, and OCL is surcharge ratio, and γ is the severe of the soil body, γESPFor the severe of light material, H0For
The design height of embankment.
Further, the light material uses Ultra-Light Material EPS (polystyrene foam) block foam；Cause
Eps foam plastic blocks very light in weight, unit weight are about the 1% of native unit weight.Surcharge ratio can be greatly improved in this way, make surcharge ratio
More than 1.3, increase the overconsolidation ratio of the soil body, to reduce secondary consolidation settlement.
Compared with prior art, the invention has the advantages that：
(1) present invention can accurately estimate ground secondary consolidation settlement (settlement after construction), can effectively control settlement amount after construction.
(2) present invention can make surcharge ratio be more than 1.3, without being limited by base stabilization.
(3) present invention can require to carry out Quantitative design according to structure to the different of ground settlement after construction.
Description of the drawings
Fig. 1 is that the present invention is based on overconsolidation methods to determine that light material backfills the flow diagram of thickness.
Fig. 2 is e~lgt curve graphs in secondary consolidation experiment.
Fig. 3 is the matched curve figure of secondary consolidation coefficient and overconsolidation ratio.
Fig. 4 is that each stress expresses schematic diagram in overconsolidation ratio calculating process.
Fig. 5 is the matched curve figure of secondary consolidation settlement amount and surcharge ratio.
Specific implementation mode
In order to more specifically describe the present invention, below in conjunction with the accompanying drawings and specific implementation mode is to technical scheme of the present invention
It is described in detail.
Core of the invention thought is：Before basement process design, geological prospecting obtains undisturbed soil sample simultaneously, carries out series
Conventional secondary consolidation experiment and overconsolidated soil secondary consolidation experiment obtain undisturbed soil secondary consolidation coefficient, conventional geological parameter and overconsolidation
Trial curve；When basement process designs, other than carrying out the calculating of conventional stabilization and primary consolidation sedimentation, secondary consolidation is also carried out
It settles (settlement after construction) to calculate, the requirement according to concrete engineering to ground settlement after construction carries out Quantitative design.
Soft-soil foundation treatment method of the present invention includes the following steps：
Step 1：Geological prospecting obtains undisturbed soil sample simultaneously, carries out the conventional secondary consolidation experiment of series and conventional soil test,
By undisturbed soil laboratory test, the secondary consolidation coefficient of weak soil and conventional geological parameter can be accurately obtained in this way, so as to relatively accurate
Estimate secondary consolidation settlement amount and primary consolidation settlement in ground.
Step 2：The settlement amount after construction of soft soil foundation under normal consolidation state is calculated by undisturbed soil laboratory test.
Soft soil foundation layering is determined first, and geological prospecting is carried out in Engineering Zone and obtains every layer of soil using thin-wall sampler
Original state weak soil soil sample；Then sample is made in collected soil sample and carried out under normal consolidation state one-dimensional secondary consolidation experiment and
Conventional soil test.Reference is tested in one-dimensional secondary consolidation《Standard for test methods of earthworks》The requirement of middle consolidation test carries out sample
Hierarchical loading surveys note specimen height change, i.e., records each instantaneous moment sample after applying every grade of load sequentially in time
Change in elevation, load stablize 48h after apply next stage load again；It is bent to obtain one-dimensional secondary consolidation experiment e~lgt under every grade of load
Line arranges the undisturbed soil secondary consolidation coefficient for obtaining each soil layer.
A large amount of test data shows that S types are presented in e~lgt curves, and Fig. 2 is indoor one-dimensional consolidation test result, by testing
For rule it is found that the inflection point second half section is the secondary consolidation stage, slope is secondary consolidation coefficient.It is calculated using formula (1), obtains weak soil
The undisturbed soil secondary consolidation coefficient of each soil layer of ground；The secondary consolidation settlement amount that each soil layer is finally calculated according to formula (2), into
And the secondary consolidation settlement amount of each soil layer is added up and obtains the total secondary consolidation settlement amount of soft soil foundation under normal consolidation state.
In formula：CαFor secondary consolidation coefficient, t1~t2By the secondary consolidation the beginning and the end time taken in experiment, e1And e2It is respectively secondary solid
Tie the beginning and the end time corresponding secondary consolidation void ratio.
In formula：siFor the secondary consolidation settlement amount of each soil layer, HiFor each the thickness of the layer, subscript i indicates i-th layer, e0For
The void ratio when degree of consolidation 100%.
Step 3：If the settlement amount after construction of soft soil foundation is more than settlement after construction requirement of the Practical Project to soft soil foundation,
Soft soil foundation is handled using overconsolidation method, overconsolidation method carries out at discharging consolidation+preloading soft soil foundation
It manages, Ultra-Light Material is unloaded and backfill after the expired foot of precompressed and fills pavement structure (or the structures such as dykes and dams).
Overconsolidation method can make soft clay be converted into overconsolidated soil, to reduce the secondary consolidation coefficient of weak soil, reduce Soft Soil Layer
Secondary consolidation settlement amount, achieve the purpose that control structure settlement after construction.Overconsolidation method need to carry out piling prepressing to soft soil foundation,
The stability that embankment must be ensured during preloading unloads when being pre-stressed to ground consolidation degree and reaching 100% or more and backfills lightweight material
The filling-up thickness of material, light material is required to determine by Practical Project to soft soil foundation settlement after construction.
Light material in present embodiment uses Ultra-Light Material EPS (polystyrene foam) block foam, because
Eps foam plastic blocks very light in weight, unit weight are about the 1% of native unit weight；Surcharge ratio can be greatly improved in this way, make surcharge ratio
More than 1.3, increase the overconsolidation ratio of the soil body, to reduce secondary consolidation settlement.
Step 4：Using overconsolidation method to determining light material by following steps in Soft Ground design process
Filling-up thickness, as shown in Figure 1：
Weak soil soil sample is made sample and carries out one-dimensional secondary consolidation experiment under different overconsolidation states by 4.1, is fitted soft
The each soil layer secondary consolidation coefficient of soil base with overconsolidation ratio change curve, as shown in Figure 3.
More than 4.2 groups of different surcharge ratios of selection look into additional stress coefficient table according to load type, load is piled up, and count
It calculates each soil layer and depresses the front and back additional stress and weight stress of unloading in advance in different surcharge ratio loads, and according to formula (3)
The overconsolidation ratio of each soil layer under different surcharge ratios is calculated, each stress expression meaning is as shown in Figure 4.
In formula：σ0For the weight stress of the soil body, σ1For the additional stress of the soil body after load, σ2For after unloading the soil body it is additional
Stress.
4.3 determine the secondary consolidation coefficient of each soil layer according to the overconsolidation ratio of each soil layer under different surcharge ratios, in turn
The secondary consolidation settlement amount of each soil layer under different surcharge ratios is calculated according to secondary consolidation coefficient, and the secondary consolidation of each soil layer is sunk
Drop amount is cumulative to obtain the settlement amount after construction of soft soil foundation under different surcharge ratios.
4.4 draw out change curve of the soft soil foundation settlement amount after construction with surcharge ratio, as shown in figure 5, according to Practical Project
The settlement after construction of soft soil foundation is required to choose corresponding surcharge ratio, and then is calculated according to selected surcharge ratio and determines lightweight material
The filling-up thickness of material.Consider to change fill out when, define surcharge ratio OCL be the load under surcharge preloading state be load after loading with
The ratio between the working load of roadbed after displacement.By taking Expressway Embankment as an example, due to embankment design height H0When design it has been determined that
Therefore surcharge ratio is according to being defined as：
In formula：H is replacement thickness, and OCL is surcharge ratio, and γ is the severe of the soil body, γESPFor the severe of ESP replacing methods,
H0For embankment design height.
The calculation formula that above formula arrangement can be obtained to replacement thickness is as follows：
Different surcharge ratios corresponds to different replacement thickness, as shown in figure 5, sinking after controlling work by different replacement thickness
Drop.
The above-mentioned description to embodiment can be understood and applied the invention for ease of those skilled in the art.
Person skilled in the art obviously easily can make various modifications to above-described embodiment, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, the improvement made for the present invention and modification all should be in protection scope of the present invention
Within.
Claims (9)
1. a kind of soft-soil foundation treatment method by controlling secondary consolidation settlement, it is characterised in that：Pass through undisturbed soil laboratory test
The settlement amount after construction of soft soil foundation under normal consolidation state is calculated, if it is more than settlement after construction of the Practical Project to soft soil foundation
It is required that then being handled soft soil foundation using overconsolidation method, the overconsolidation method carries out discharging consolidation+heap to soft soil foundation
Preloading method processing is carried, unloads and backfills light material after the expired foot of precompressed and fill pavement structure.
2. soft-soil foundation treatment method according to claim 1, it is characterised in that：It is calculated just by undisturbed soil laboratory test
The detailed process of soft soil foundation settlement amount after construction is under normal concretion state：Geological prospecting is carried out in Engineering Zone and utilize thin first
Wall soil sampler obtains original state weak soil soil sample；Then sample is made in collected soil sample and is carried out under normal consolidation state one-dimensional
Secondary consolidation is tested and conventional soil test, and the undisturbed soil secondary consolidation coefficient and conventional geotechnique for obtaining each soil layer of soft soil foundation are joined
Number；The secondary consolidation settlement amount of each soil layer is finally calculated according to undisturbed soil secondary consolidation coefficient, and then the secondary of each soil layer is consolidated
Knot settling amount is cumulative to obtain the settlement amount after construction of soft soil foundation under normal consolidation state.
3. soft-soil foundation treatment method according to claim 2, it is characterised in that：It is each to be calculated by the following formula acquisition
The undisturbed soil secondary consolidation coefficient of soil layer：
Wherein：For the undisturbed soil secondary consolidation coefficient C of any soil layerα, t1~t2For secondary consolidation the beginning and the end selected in experiment when
Between, e1And e2Respectively the soil layer is in secondary consolidation the beginning and the end time corresponding secondary consolidation void ratio.
4. soft-soil foundation treatment method according to claim 2, it is characterised in that：It is calculated by the following formula each soil layer
Secondary consolidation settlement amount：
Wherein：Secondary consolidation settlement amount s, H for any soil layer are the thickness of the layer, CαFor the undisturbed soil secondary consolidation of the soil layer
Coefficient, t1~t2For secondary consolidation the beginning and the end time selected in experiment, e0The void ratio of soil layer when reaching 100% for the degree of consolidation.
5. soft-soil foundation treatment method according to claim 1, it is characterised in that：The overconsolidation method to soft soil foundation into
Row piling prepressing is pre-stressed to and unloads and backfill light material when ground consolidation degree reaches 100%, the filling-up thickness of light material by
Practical Project requires to determine to soft soil foundation settlement after construction.
6. soft-soil foundation treatment method according to claim 1 or 5, it is characterised in that：To weak soil using overconsolidation method
The filling-up thickness of light material is determined in base processing design process by following steps：
(1) sample is made in weak soil soil sample and carries out one-dimensional secondary consolidation experiment under different overconsolidation states, with fitting weak soil
The each soil layer secondary consolidation coefficient of base with overconsolidation ratio change curve；
(2) multigroup different surcharge ratio is chosen, it is attached before and after different surcharge ratio loads depress unloading in advance to calculate each soil layer
Add stress and weight stress, and calculates the overconsolidation ratio of each soil layer under different surcharge ratios according to additional stress and weight stress；
(3) according to each soil layer secondary consolidation coefficient with the change curve of overconsolidation ratio, each soil layer under different surcharge ratios is determined
Secondary consolidation coefficient, and then the secondary consolidation settlement amount of each soil layer under different surcharge ratios is calculated according to secondary consolidation coefficient, and will be every
The secondary consolidation settlement amount of one soil layer is cumulative to obtain the settlement amount after construction of soft soil foundation under different surcharge ratios；
(4) change curve of the soft soil foundation settlement amount after construction with surcharge ratio is drawn out, and according to Practical Project to soft soil foundation
Settlement after construction requires to choose corresponding surcharge ratio, and then fills thickness according to the selected determining light material of surcharge ratio calculating
Degree.
7. soft-soil foundation treatment method according to claim 6, it is characterised in that：Pass through following public affairs in the step (2)
Formula calculates the overconsolidation ratio of each soil layer under different surcharge ratios：
Wherein：For the overconsolidation ratio OCR, σ of any soil layer i under any surcharge ratio OCL0Be soil layer i at surcharge ratio OCL from
Weight stress, σ1For additional stresses of the soil layer i at surcharge ratio OCL, σ after load2It is attached at surcharge ratio OCL for soil layer i after unloading
Add stress.
8. soft-soil foundation treatment method according to claim 6, it is characterised in that：Pass through following public affairs in the step (4)
Formula calculates the filling-up thickness of light material：
Wherein：H is filling-up thickness, and OCL is surcharge ratio, and γ is the severe of the soil body, γESPFor the severe of light material, H0For embankment
Design height.
9. soft-soil foundation treatment method according to claim 1, it is characterised in that：The light material uses ultralight material
Expect eps foam plastic blocks.
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| CN109653260A (en) * | 2018-12-04 | 2019-04-19 | 中航勘察设计研究院有限公司 | A kind of settlement calculation method of the coral sand ground based on vibration environment second compression coefficient |
| CN110988300A (en) * | 2019-11-19 | 2020-04-10 | 北京城建集团有限责任公司 | Method for measuring secondary compression coefficient of coral sand based on hydraulic reclamation test |
| CN111898175A (en) * | 2019-07-12 | 2020-11-06 | 江苏科能岩土工程有限公司 | Calculation method of layered foundation vacuum preloading consolidation degree |
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| CN101603308A (en) * | 2009-04-23 | 2009-12-16 | 上海交通大学 | The preloading safe construction method that on the strong constitutive property weak soil, uses |
| CN101806056A (en) * | 2010-04-28 | 2010-08-18 | 郭艳景 | Soft-soil foundation treatment method for controlling secondary consolidation settlement |
| CN101813691A (en) * | 2010-05-11 | 2010-08-25 | 中交第三航务工程勘察设计院有限公司 | Method for detecting secondary consolidation coefficient of soft soil indoors and measuring device using same |
| CN107340183A (en) * | 2017-04-28 | 2017-11-10 | 中国矿业大学 | Structural soft soil secondary consolidation coefficient describes method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101603308A (en) * | 2009-04-23 | 2009-12-16 | 上海交通大学 | The preloading safe construction method that on the strong constitutive property weak soil, uses |
| CN101806056A (en) * | 2010-04-28 | 2010-08-18 | 郭艳景 | Soft-soil foundation treatment method for controlling secondary consolidation settlement |
| CN101813691A (en) * | 2010-05-11 | 2010-08-25 | 中交第三航务工程勘察设计院有限公司 | Method for detecting secondary consolidation coefficient of soft soil indoors and measuring device using same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109653260A (en) * | 2018-12-04 | 2019-04-19 | 中航勘察设计研究院有限公司 | A kind of settlement calculation method of the coral sand ground based on vibration environment second compression coefficient |
| CN109653260B (en) * | 2018-12-04 | 2022-03-08 | 中航勘察设计研究院有限公司 | Settlement calculation method of coral sand foundation based on secondary compression coefficient of vibration environment |
| CN111898175A (en) * | 2019-07-12 | 2020-11-06 | 江苏科能岩土工程有限公司 | Calculation method of layered foundation vacuum preloading consolidation degree |
| CN111898175B (en) * | 2019-07-12 | 2021-04-09 | 江苏科能岩土工程有限公司 | Calculation method of layered foundation vacuum preloading consolidation degree |
| CN110988300A (en) * | 2019-11-19 | 2020-04-10 | 北京城建集团有限责任公司 | Method for measuring secondary compression coefficient of coral sand based on hydraulic reclamation test |
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| CN108797558B (en) | 2020-05-12 |
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