CN103850242B - A kind of non-compacting method processes the method for collapsible loess foundation - Google Patents
A kind of non-compacting method processes the method for collapsible loess foundation Download PDFInfo
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- CN103850242B CN103850242B CN201410088518.5A CN201410088518A CN103850242B CN 103850242 B CN103850242 B CN 103850242B CN 201410088518 A CN201410088518 A CN 201410088518A CN 103850242 B CN103850242 B CN 103850242B
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- replacement
- foundation
- collapsible loess
- loess foundation
- displacement
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Abstract
The invention discloses a kind of method that non-compacting method processes collapsible loess foundation, the method comprises the following steps: use the intact loess in the method displacement collapsible loess foundation of joint bar, displacement；Replacement rate, replacement intensity when adjusting basement process carry out non-compaction to collapsible loess foundation；When ground is by water-soaked, there is not Collapsing Deformation in collapsible loess foundation.The present invention uses the method for joint bar, displacement, intact loess construction material in collapsible loess foundation is replaced, thus reach whole collapsible loess foundation and the Treatment method of collapsible loess foundation of Collapsing Deformation no longer occurs after by water-soaked, non-compacting method processes collapsible loess foundation and solves tradition compaction pile method when processing big thickness collapsible loess foundation and arid area collapsible loess foundation, it is unable to reach the awkward situation of expection purpose, it is possible to general collapsible loess is processed.
Description
Technical field
The invention belongs to foundation soil settlement by soaking process field, particularly relate to a kind of non-compacting method and process collapsible loess foundation
Method.
Background technology
On foundation soil under the effect of overburden layer weight stress, or under weight stress and additional stress act on jointly, because of immersion
The structural deterioration of rear soil and occur the soil of notable additional deformation to be referred to as collapsible soil, belong to special soils.
When wet-sinking soil carries out engineering construction, it is necessary to consider to cause additional settlement that engineering may be made because of damp sink of foundation
The harm become, selects suitable method for processing foundation, it is to avoid or eliminate the saturated yielding of ground or the danger caused because of a small amount of saturated yielding
Evil, the purpose that collapsible loess foundation processes mainly by eliminating the settlement by soaking of loess, improves the bearing capacity of ground.
The method eliminating foundation soil settlement by soaking at present specifically includes that compaction pile method, displacement method, heavy-tamping method, presoaking etc..
The most most commonly used is compaction pile method, and its principle is, rammer crowded by external force etc., improves whole ground soil compactness,
Reduce hole therein so that it is when immersion, notable additional sinking does not occur, thus reach the purpose of Compaction variables.
Prior art is when running into big thickness Site of Collapsible Loess, and the legacy equipment that compacting method processes is difficult to reach to process relatively
The purpose of deep collapsible loess foundation.
When the moisture content of collapsible loess foundation is low, the structural strength of soil is relatively big, and traditional compacting method cannot be to foundation soil
Carry out the most compacted, or cannot construct at all.
When running into above-mentioned situation, owing to compacting method cannot effectively process yellow soil horizon of collapsibility, other method can use preimpregnation
Water law carrys out Compaction variables, or uses pile foundation.But presoaking long processing period, big to Building Settlement around Foundation, and
The size that effect is tested pits by immersion is affected bigger；When using pile foundation, owing to yellow soil horizon of collapsibility need to consider negative friction shadow
Ringing, cause the long first mate of stake to increase, expense is significantly increased.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of method that non-compacting method processes collapsible loess foundation, use joint bar,
Intact loess in the method displacement collapsible loess foundation of displacement, replacement rate during adjustment basement process, replacement intensity
Collapsible loess foundation is carried out non-compaction, it is intended to solve collapsible loess foundation and occur saturated yielding to become after by water-soaked
The problem of shape.
The embodiment of the present invention is achieved in that a kind of method that non-compacting method processes collapsible loess foundation, by adjusting
Replacement rate, replacement intensity, when foundation soil is by water-soaked, by being subject between collapsible loess between replacement and replacement
The transfer of power and reequilibrate, thus reach the method that ground does not produce Collapsing Deformation；
Specifically include following steps:
Use the part intact loess in the method displacement collapsible loess foundation of joint bar, displacement；
Replacement rate, replacement intensity when adjusting basement process carry out non-compaction to collapsible loess foundation；Replacement rate
I.e. area replacement ratio, is the ratio of the replacement area of plane and the area of base of single replacement equivalent process；Adjust displacement
Rate i.e. by adjusting replacement diameter or the method for spacing, adjusts the ratio of replacement area and area of base；
Replacement intensity i.e. strength characteristic in same test method；Adjust replacement intensity i.e. by changing replacement material
Material or the density method of adjustment material, make the strength characteristic of replacement change；
Use joint bar, displacement method displacement collapsible loess foundation in intact loess use construction material be dirt,
Soil cement or concrete；
Replacement rate when adjusting basement process, replacement intensity carry out the ginseng of non-compaction foundation to collapsible loess foundation
Number is stake footpath, pilespacing, pile shaft material, stake are long；
When ground is by water-soaked, foundation soil is not in the case of settlement by soaking is completely eliminated, and composite foundation does not occur Collapsing Deformation.
When the non-compacting method that the present invention provides processes the ground under certain condition, due to the equipment used, material and tradition side
Method is identical, and the only method by properly increasing replacement rate solves the mesh eliminating damp sink of foundation that tradition compacting method is difficult to
's.For using additive method, simple, only increase less expense.Non-compacting method processes collapsible loess
Ground solves tradition compaction pile method processing big thickness collapsible loess foundation and during the collapsible loess foundation of arid area,
It is unable to reach the awkward situation of expection purpose, it is possible to general collapsible loess is processed.Its roadmap and conventional process side
Method is entirely different, is to supplement tradition Treatment method of collapsible loess foundation.
Accompanying drawing explanation
Fig. 1 is the method schematic diagram that the non-compacting method that the embodiment of the present invention provides processes collapsible loess foundation.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
Fig. 1 shows that the non-compacting method that the present invention provides processes the method flow of collapsible loess foundation.For convenience of description,
Illustrate only part related to the present invention.
The non-compacting method that the embodiment of the present invention provides processes the method for collapsible loess foundation, and the method comprises the following steps:
Use the intact loess in the method displacement collapsible loess foundation of joint bar, displacement；
Replacement rate, replacement intensity when adjusting basement process carry out non-compaction to collapsible loess foundation；
Replacement rate i.e. area replacement ratio, is the ratio of the replacement area of plane and the area of base of single replacement equivalent process.
Adjust replacement rate i.e. by adjusting replacement diameter or the method for spacing, adjust the ratio of replacement area and area of base.
Replacement intensity i.e. strength characteristic in same test method, such as unconfined compressive strength.Adjust replacement intensity
I.e. by changing replacement material (such as dirt, soil cement, cement dirt or the concrete etc. of different proportion) or adjusting material
The methods such as the density (compactive effort energy) of material, make the strength characteristic of replacement change.
As a prioritization scheme of the embodiment of the present invention, use in the method displacement collapsible loess foundation of joint bar, displacement
The construction material that intact loess uses is dirt, soil cement, concrete.
As a prioritization scheme of the embodiment of the present invention, replacement rate when adjusting basement process, replacement intensity are to settlement by soaking
It is that stake footpath, pilespacing, pile shaft material, stake are long that loess foundation carries out the parameter of non-compaction foundation.
As a prioritization scheme of the embodiment of the present invention, when ground is by water-soaked, foundation soil settlement by soaking is not completely eliminated situation
Under, there is not Collapsing Deformation in composite foundation.
The present invention does not emphasize to process the settlement by soaking of foundation soil, but by adjusting the side such as replacement rate, replacement intensity
Method, when foundation soil is by water-soaked, by the transfer of stress and reequilibrate between collapsible loess between replacement and replacement,
Thus reach the method that ground does not produce Collapsing Deformation.
Below in conjunction with the accompanying drawings and the application principle of the present invention is further described by specific embodiment.
The non-compacting method that the embodiment of the present invention provides processes the method for collapsible loess foundation, and the method comprises the following steps:
S101: use the intact loess in the method displacement collapsible loess foundation of joint bar, displacement；
S102: replacement rate, replacement intensity when adjusting basement process carry out non-compaction to collapsible loess foundation；
When S103: ground is by water-soaked, in the case of foundation soil settlement by soaking is not completely eliminated, composite foundation does not occur saturated yielding to become
Shape.
The operation principle of the method for the non-compacting method process collapsible loess foundation that the embodiment of the present invention provides:
It is the process side processing collapsible loess foundation relative to traditional compacting method that non-compacting method processes collapsible loess foundation
For method.It uses joint bar or the method for aliquot replacement, and the part intact loess in collapsible loess foundation is used certain
Construction material (dirt, soil cement, the concrete etc.) displacement that intensity is higher, thus reach whole collapsible loess foundation
The Treatment method of collapsible loess foundation of Collapsing Deformation is no longer there is after by water-soaked.
Step one: non-compacting method processes collapsible loess foundation and uses joint bar or the method for aliquot replacement, by collapsible loess
Part intact loess in the ground construction material (dirt, soil cement, concrete etc.) that certain intensity is higher is replaced,
Thus reach whole collapsible loess foundation and Collapsing Deformation no longer occurs after by water-soaked.
Step 2: collapsible loess foundation is carried out non-compaction, is by stake footpath reasonable in design, pilespacing, pile body
The parameter such as material, stake are long, replacement rate when adjusting basement process or replacement intensity etc..
Step 3: in the case of loess is the most compacted or the most compacted between replacement, when whole ground is by water-soaked,
Due to the transfer of stress and reequilibrate between loess between replacement rate and replacement, whole stress soil layer is made not produce Collapsing Deformation,
Thus reach the method for building safety on collapsible loess foundation.The method does not impose the settlement by soaking beyond by replacement yellow
The settlement by soaking of soil foundation soil is completely eliminated or partially removes, but emphasizes by stake footpath reasonable in design, pilespacing, pile body material
Expect isoparametric in the case of, when collapsible loess foundation is by water-soaked, the transfer of forces occurring between foundation soil and replacement
And reequilibrate, it is Collapsing Deformation not to occur from macroscopically controlling whole ground；And let pass certain in the foundation soil on thin sight
Whether part has settlement by soaking, or whether Collapsing Deformation can occur.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention
Any amendment, equivalent and improvement etc. with being made within principle, should be included within the scope of the present invention.
Claims (1)
1. the method that a non-compacting method processes collapsible loess foundation, it is characterised in that by adjusting replacement rate, replacement
Intensity, when foundation soil is by water-soaked, by the transfer of stress and putting down again between collapsible loess between replacement and replacement
Weighing apparatus, thus reach the method that ground does not produce Collapsing Deformation；
Specifically include following steps:
Use the part intact loess in the method displacement collapsible loess foundation of joint bar, displacement；
Replacement rate during adjustment basement process, replacement intensity, carry out non-compaction to collapsible loess foundation；Replacement rate
I.e. area replacement ratio, is the ratio of the replacement area of plane and the area of base of single replacement equivalent process；Adjust displacement
Rate i.e. by adjusting replacement diameter or the method for spacing, adjusts the ratio of replacement area and area of base；
Replacement intensity i.e. strength characteristic in same test method；Adjust replacement intensity i.e. by changing replacement material
Or the density method of adjustment material, make the strength characteristic of replacement change；
The construction material using the intact loess in the method displacement collapsible loess foundation of joint bar, displacement to use is dirt, water
Earth or concrete；
Replacement rate when adjusting basement process, replacement intensity carry out the parameter of non-compaction foundation to collapsible loess foundation
Long for stake footpath, pilespacing, pile shaft material, stake；
When ground is by water-soaked, foundation soil is not in the case of settlement by soaking is completely eliminated, and composite foundation does not occur Collapsing Deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410088518.5A CN103850242B (en) | 2014-03-12 | 2014-03-12 | A kind of non-compacting method processes the method for collapsible loess foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410088518.5A CN103850242B (en) | 2014-03-12 | 2014-03-12 | A kind of non-compacting method processes the method for collapsible loess foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103850242A CN103850242A (en) | 2014-06-11 |
| CN103850242B true CN103850242B (en) | 2016-08-24 |
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| CN201410088518.5A Expired - Fee Related CN103850242B (en) | 2014-03-12 | 2014-03-12 | A kind of non-compacting method processes the method for collapsible loess foundation |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115305761A (en) * | 2022-06-23 | 2022-11-08 | 中化地质河南局集团有限公司 | Collapsible loess roadbed construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3524433B2 (en) * | 1999-06-07 | 2004-05-10 | 不動建設株式会社 | Improvement method of soft ground with hard layer |
| CN1891913A (en) * | 2005-07-07 | 2007-01-10 | 宁夏建筑设计研究院有限公司 | Counterweight punching-expanding replacement method |
| CN100535256C (en) * | 2007-10-22 | 2009-09-02 | 山西省机械施工公司 | Strong ramming semi-replacement construction technique |
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