CN109868811A - Consider the cement-soil stirring pile construction method of uniform intensity - Google Patents
Consider the cement-soil stirring pile construction method of uniform intensity Download PDFInfo
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- CN109868811A CN109868811A CN201910175442.2A CN201910175442A CN109868811A CN 109868811 A CN109868811 A CN 109868811A CN 201910175442 A CN201910175442 A CN 201910175442A CN 109868811 A CN109868811 A CN 109868811A
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Abstract
The present invention provides a kind of cement-soil stirring pile construction methods for considering uniform intensity, comprising the following steps: carries out construction site leveling, determines the construction location of multiple mixing piles of not constructing；Blender is aligned to the center of one of them mixing pile of not constructing, is stirred machine positioning；Starting blender executes sky and stirs sinking operation, and the drilling rod for controlling blender sinks down into predetermined depth while cutting soil；The drilling rod of control blender continues to sink and stir simultaneously the soil body until projected depth；After the drilling rod to predetermined depth for promoting blender, stock pump gunite into the soil body is sent in unlatching, while the drilling rod for controlling blender is rotated down and is stirred operation；After the drilling rod of blender is rotated down stirring to projected depth, the drilling rod for promoting blender rotates progress stirring operation upwards and completes the construction of the mixing pile when drilling rod of machine to be mixed promotes stirring to earth's surface or the preset distance above away from designed elevation；Above step is repeated, until completing the construction of all mixing piles.
Description
Technical field
The present invention relates to foundation treatment technology fields, and in particular to it is a kind of consider uniform intensity cement mixing method apply
Work method.
Background technique
Deep Mixing Method is a kind of method for processing foundation for reinforcing soft soil and weak soil, existing Soil-cement
Stake causes grouting pressure and grouting amount to control difficulty, no matter uses one-way or bi-directional Beater operator since soil layer strength difference is big
Skill constructs in obvious, the biggish Soft Ground construction of soil layer strength difference, however it remains Soil-cement is uneven in stratification
Even, cement grout is the problem of pile body is unevenly distributed.
Summary of the invention
The present invention provides a kind of cement-soil stirring pile construction method for considering uniform intensity, solves Soil-cement not
Uniformly, cement grout is the problem of pile body is unevenly distributed, to improve the pile quality of mixing pile, expands soil cement and stirs
Mix the application range of stake.
The cement-soil stirring pile construction method provided by the invention for considering uniform intensity, comprising the following steps: S1) it carries out
Construction site leveling, determines the construction location of multiple mixing piles of not constructing；S2 blender) is directed at one of them stirring of not constructing
The center of stake is stirred machine positioning；S3) start the blender to execute multiple sky and stir to sink to operating, be stirred described in control
The drilling rod for mixing machine sinks down into predetermined depth while cutting soil；S4 the drilling rod for) controlling the blender continues to sink and stir simultaneously
The soil body is mixed up to projected depth, wherein the projected depth is lower than the predetermined depth；S5) drilling rod of the blender is promoted extremely
After the predetermined depth, stock pump gunite into the soil body is sent in unlatching, and controls the drilling rod of the blender simultaneously to backspin
Rotate into row stirring operation；S6) after the drilling rod of the blender is rotated down stirring to the projected depth, the stirring is promoted
The drilling rod of machine rotates upwards carries out stirring operation, and the drilling rod to the blender, which is promoted, to be stirred more than to earth's surface or away from designed elevation
When preset distance, the construction of the mixing pile is completed；S7 step S2) is repeated) to S6), until completing the construction of all mixing piles.
Preferably, step S1) determine the construction locations of multiple mixing piles of not constructing, comprising: by multiple mixing piles of not constructing
Construction location arranged according to rectangle or blossom type.
Preferably, step S2) in using crane suspention blender be stirred machine positioning.
Preferably, step S3) the starting blender executes multiple sky and stirs sinking operation, control the drilling rod of the blender
Predetermined depth is sunk down into while cutting soil, comprising: setting leading truck controls the drilling rod of the blender along the leading truck
Vertical direction predetermined depth is sunk down into while cutting soil.
Preferably, step S4) drilling rod of the control blender continues to sink and stir simultaneously the soil body until projected depth,
Include: to control the drilling rod of the blender to continue to sink and after stirring the soil body to the first projected depth simultaneously, promotes the stirring
To earth's surface, and again, the drilling rod of blender described in secondary control sinks and stirs the soil body simultaneously until the projected depth drilling rod of machine,
Wherein first projected depth is between the predetermined depth and the projected depth.
Preferably, there is the drilling rod of the blender forward and reverse rotation to stir drill bit.
Preferably, step S5) described in cement slurry the ratio of mud be 0.5.
Preferably, step S5) in gunite spouting velocity be 62.4~83.2L/min.
Preferably, step S5) in gunite spray pressure between 0.4~0.5MPa.
Preferably, step S6) described in preset distance be 50cm.
The cement-soil stirring pile construction method provided by the invention for considering uniform intensity, obvious suitable for stratification construction,
In the biggish soft soil foundation of soil layer strength difference, technique is stirred by increasing sky, the structural of original state weak soil is destroyed, reduces its adhesive aggregation
Property, while the otherness of each layer weak soil is reduced, improve soil strength difference, make each layer soil uniform intensity, guarantees later period spray
The uniformity of slurry stirring pile body cement grout distribution；And the pile making method for stirring while carrying out by spray, solve Soil-cement
Unevenly, cement grout, to improve the pile quality of mixing pile, expands soil cement the problem of pile body is unevenly distributed
The application range of mixing pile.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 be according to the present invention embodiment the considerations of uniform intensity cement-soil stirring pile construction method the step of stream
Cheng Tu；
Fig. 2 be according to the present invention embodiment the considerations of uniform intensity cement-soil stirring pile construction method in stirring
Pile constructing process flow chart.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
With reference to the accompanying drawing, technical solution in the embodiment of the present invention is described in detail.
As depicted in figs. 1 and 2, the present invention provides a kind of cement-soil stirring pile construction method for considering uniform intensity, packet
Include following steps: S1) construction site leveling is carried out, determine the construction location of multiple mixing piles of not constructing；S2) blender is aligned
The center of one of them mixing pile of not constructing is stirred machine positioning；S3) start the multiple sky of the blender execution to stir down
Heavy operation, the drilling rod for controlling the blender sink down into predetermined depth while cutting soil；S4 the drilling rod of the blender) is controlled
Continue to sink and stir the soil body simultaneously up to projected depth, wherein the projected depth is lower than the predetermined depth；S5 institute) is promoted
After the drilling rod to the predetermined depth for stating blender, stock pump gunite into the soil body is sent in unlatching, and is stirred described in control simultaneously
The drilling rod for mixing machine, which is rotated down, is stirred operation；S6 it) is stirred to the design deeply when the drilling rod of the blender is rotated down
After degree, the drilling rod for promoting the blender rotates upwards carries out stirring operation, and the drilling rod to the blender promotes stirring to ground
When table or the preset distance above away from designed elevation, the construction of the mixing pile is completed；S7 step S2) is repeated) to S6), until completing
The construction of all mixing piles.
Weak soil and the soft soil foundation unconfined compressive strength after disturbance are only 30% or so of undisturbed soil, and cohesive strength is only
It is 15% or so of undisturbed soil, Deep Mixing Method is a kind of method for processing foundation for reinforcing soft soil and weak soil, this
Method mainly using the materials such as cement or lime be used as curing agent, ground depths utilize Mixing Machine, on the spot by weak soil with
Curing agent pressure is stirred, and a series of physics, chemical reaction occurs by curing agent and ground weak soil, to make ground weak soil
The cement mixing method with globality, water stability and some strength is hardened into, this cement mixing method and inter-pile soil are common
Composite foundation is formed, the bearing capacity of ground is improved, to reduce settlement of foundation.
In existing Soil-cement Mixing Pile on Muck Foundation construction, controls grouting pressure and grouting amount is extremely difficult, slip casting pressure
Power is too small, encounters the strong soil layer of viscosity, because the soil layer construction intensity is big under single slurry pressure, other soil layers of osmotic coefficient ratio
Small, grout mixing becomes smaller, and therefore, it is difficult to inject cement grout；Grouting pressure is excessive, and the small soil layer grouting amount of viscosity surpasses again
Mark forms concrete column or cement block, " broken pile " phenomenon is resulted in, therefore no matter use one-way or bi-directional stirring technique, in layer
Reason construction is obvious, in the biggish Soft Ground construction of soil layer strength difference, however it remains Soil-cement is uneven, cement
Slurries are the problem of pile body is unevenly distributed.
According to the technique and scheme of the present invention, the cement-soil stirring pile construction side provided by the invention for considering uniform intensity
Method suitable for stratification construction obvious, the biggish soft soil foundation of soil layer strength difference, stirs technique by increasing sky, destroys original state
Weak soil it is structural, reduce its cohesiveness, while reduce the otherness of each layer weak soil, make each layer soil uniform intensity, guarantee
The uniformity of later period cement guniting stirring pile body cement grout distribution；And the pile making method for stirring while carrying out by spray, solve cement
Soil stirs uneven, cement grout the problem of pile body is unevenly distributed.
Specifically, in construction method provided by the invention, step S1 is first carried out) construction site leveling is carried out, determination is more
The construction location of a mixing pile of not constructing creates conditions for subsequent construction.
A kind of embodiment according to the present invention, step S1) determine the construction locations of multiple mixing piles of not constructing, comprising:
The construction location of multiple mixing piles of not constructing is arranged according to rectangle or blossom type, according to rectangle or the arrangement of blossom type,
So that the uniform force of each mixing pile, it is ensured that the pile quality and pile quality of cement mixing method.
After the leveling of place, step S2 is executed) blender is aligned to the center of one of them mixing pile of not constructing, it carries out
Blender positioning；To guarantee that cement mixing method pile position meets design requirement, cement mixing method is further ensured
Pile quality and pile quality.
A kind of embodiment according to the present invention, step S2) in using crane suspention blender be stirred machine positioning,
Crane operation is convenient, and stability is high, convenient for suspention blender positioning.
After the completion of blender alignment, step S3 is executed) the starting blender executes multiple sky and stirs sinking operation, control institute
The drilling rod for stating blender sinks down into predetermined depth while cutting soil；Since sky stirs the structure that operation destroys each layer soil, make each
The uniform intensity of layer soil, so as to guarantee that cement grout is evenly distributed in the pile body of mixing pile, to improve pile matter
Amount and intensity.
A kind of embodiment according to the present invention, it is preferable that step S3) the starting blender executes multiple sky and stirs sinking
Operation, the drilling rod for controlling the blender sinks down into predetermined depth while cutting soil, comprising: setting leading truck, described in control
The drilling rod of blender sinks down into predetermined depth along the vertical direction of the leading truck while cutting soil.Pass through the leading truck
Guiding role, ensure that the drilling rod vertical downward movement of the blender, enable to the stirring pile verticality to be formed
Meet design requirement, and then ensure that the pile quality of the mixing pile.
According to the technique and scheme of the present invention, step S4) drilling rod of the control blender continues to sink and stirs soil simultaneously
Body is up to projected depth, wherein the projected depth is lower than the predetermined depth；The upper layer soil body of predetermined depth is carried out first
Sufficient sky stirs, and continues sky still further below and stirs to projected depth, ensure that each layer soil obtains sufficient sky and stirs, to accomplish soil
The homogenization of layer intensity.
A kind of embodiment according to the present invention, it is preferable that step S4) drilling rod of the control blender continues to sink simultaneously
The soil body is stirred simultaneously until projected depth, comprising: the drilling rod for controlling the blender continues to sink and stir the soil body simultaneously to the
After one projected depth, the drilling rod of the blender is promoted to earth's surface, and the drilling rod of blender described in secondary control sinks and simultaneously again
The soil body is stirred until the projected depth, wherein first projected depth the predetermined depth and the projected depth it
Between.Sky twice is carried out by layering and stirs operation, so that each soil layer sky stirs sufficiently, is sufficiently dropped the intensity of each layer weak soil and cohesive strength
It is low, the uniform intensity of each layer soil is further ensured, effectively controls and provides safeguard for the grouting pressure in later period.
A kind of embodiment according to the present invention, it is preferable that there is the drilling rod of the blender forward and reverse rotation stirring to bore
Head improves mixing uniformity to guarantee that better sky stirs quality.
According to the technique and scheme of the present invention, step S5) promote the drilling rod to the predetermined depth of the blender after, open
Stock pump gunite into the soil body is sent, and the drilling rod for controlling the blender simultaneously is rotated down and is stirred operation；It is spraying
By stirring so that gunite is sufficiently mixed with the soil body while jetting mud.
A kind of embodiment according to the present invention, step S5) in the higher situation of moisture content of practical soil property, can be with
Selecting the ratio of mud of the cement slurry is 0.5, determines that slurry specific gravity is 1.823, is generated preferably admittedly with the soil body after stirring sky
Change effect.
A kind of embodiment according to the present invention, step S5) in gunite spouting velocity be 62.4~83.2L/
Min, middle gunite spray pressure between 0.4~0.5MPa.To guarantee that grouting pressure is moderate, cement slurry and the soil body are mixed
It closes uniformly, to form the water and soil mixing pile of globality, stability and some strength.
According to the technique and scheme of the present invention, step S6) it stirs when the drilling rod of the blender is rotated down to the design
After depth, the drilling rod for promoting the blender rotates upwards carries out stirring operation, and the drilling rod to the blender promotes stirring extremely
When earth's surface or the preset distance above away from designed elevation, the construction of the mixing pile is completed；In the mistake that the drilling rod of the blender is promoted
Cheng Zhong is stirred operation again, further improves the uniformity of stirring, to guarantee that cement grout is distributed in pile body
It is even, to improve pile quality and intensity.
A kind of embodiment according to the present invention, it is preferable that step S6) described in preset distance be 50cm so that stake top
Part also obtains sufficient slip casting and stirring, ensure that the quality of stake top.
According to the technique and scheme of the present invention, step S7) repeat step S2) to S6), until completing applying for all mixing piles
Work, and proportion, spouting velocity and the pressure etc. of cement slurry can be adjusted according to ready-made situation, to ensure a cement mixing method
Pile quality and pile quality.
The object of the present invention is to provide a kind of cement-soil stirring pile construction methods for considering uniform intensity, are suitable for stratification
It constructs in obvious, the biggish soft soil foundation of soil layer strength difference, stirs technique by increasing sky, destroy the structural of original state weak soil,
Its cohesiveness is reduced, while reduces the otherness of each layer weak soil, improves soil strength difference, makes each layer soil uniform intensity,
Guarantee the uniformity of later period cement guniting stirring pile body cement grout distribution；And the pile making method for stirring while carrying out by spray, it solves
Soil-cement is uneven, cement grout is the problem of pile body is unevenly distributed, to improve mixing pile pile quality, expands
The application range of cement mixing method.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (10)
1. it is a kind of consider uniform intensity cement-soil stirring pile construction method, which is characterized in that the construction method include with
Lower step:
S1 construction site leveling) is carried out, determines the construction location of multiple mixing piles of not constructing；
S2) blender is aligned to the center of one of them mixing pile of not constructing, be stirred machine positioning；
S3) start the blender and execute multiple sky and stir sinking operation, under controlling the drilling rod of the blender while cutting soil
It is sink to predetermined depth；
S4 the drilling rod for) controlling the blender continues to sink and stir the soil body simultaneously up to projected depth, wherein the design is deep
Degree is lower than the predetermined depth；
S5 after the drilling rod to the predetermined depth for) promoting the blender, stock pump gunite into the soil body is sent in unlatching, and same
When control the drilling rod of the blender and be rotated down and be stirred operation；
S6) after the drilling rod of the blender is rotated down stirring to the projected depth, promoted the drilling rod of the blender to
Upper rotation carries out stirring operation, and the drilling rod to the blender promotes stirring to earth's surface or away from the above preset distance of designed elevation
When, complete the construction of the mixing pile；
S7 step S2) is repeated) to S6), until completing the construction of all mixing piles.
2. construction method according to claim 1, which is characterized in that step S1) determine applying for multiple mixing piles of not constructing
Station is set, comprising:
The construction location of multiple mixing piles of not constructing is arranged according to rectangle or blossom type.
3. construction method according to claim 1, which is characterized in that step S2) in using crane suspend in midair blender into
The positioning of row blender.
4. construction method according to claim 1, which is characterized in that step S3) the starting multiple sky of blender execution
Sinking operation is stirred, the drilling rod for controlling the blender sinks down into predetermined depth while cutting soil, comprising:
Leading truck is set, and the drilling rod for controlling the blender is sunk down into while cutting soil along the vertical direction of the leading truck
Predetermined depth.
5. construction method according to claim 1, which is characterized in that step S4) drilling rod of the control blender continues
Sink and stir the soil body simultaneously until projected depth, comprising:
The drilling rod for controlling the blender continues after sinking and stirring the soil body to the first projected depth simultaneously, promotes the blender
Drilling rod to earth's surface, and again, the drilling rod of blender described in secondary control sinks and stirs the soil body simultaneously until the projected depth,
Described in the first projected depth between the predetermined depth and the projected depth.
6. construction method according to claim 1, which is characterized in that the drilling rod of the blender is stirred with forward and reverse rotation
Mix drill bit.
7. construction method according to claim 1, which is characterized in that step S5) described in the ratio of mud of cement slurry be
0.5。
8. construction method according to claim 1, which is characterized in that step S5) in the spouting velocity of gunite be
62.4~83.2L/min.
9. construction method according to claim 7, which is characterized in that step S5) in the spray pressure of gunite exist
Between 0.4~0.5MPa.
10. construction method according to claim 1, which is characterized in that step S6) described in preset distance be 50cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175442.2A CN109868811A (en) | 2019-03-08 | 2019-03-08 | Consider the cement-soil stirring pile construction method of uniform intensity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175442.2A CN109868811A (en) | 2019-03-08 | 2019-03-08 | Consider the cement-soil stirring pile construction method of uniform intensity |
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| CN109868811A true CN109868811A (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910175442.2A Pending CN109868811A (en) | 2019-03-08 | 2019-03-08 | Consider the cement-soil stirring pile construction method of uniform intensity |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556631A (en) * | 2013-11-18 | 2014-02-05 | 高伯明 | Pile-forming operation method for stirring pile |
| CN105040683A (en) * | 2015-07-19 | 2015-11-11 | 南宁市政工程集团有限公司 | Informatization construction method for cement mixing piles |
-
2019
- 2019-03-08 CN CN201910175442.2A patent/CN109868811A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556631A (en) * | 2013-11-18 | 2014-02-05 | 高伯明 | Pile-forming operation method for stirring pile |
| CN105040683A (en) * | 2015-07-19 | 2015-11-11 | 南宁市政工程集团有限公司 | Informatization construction method for cement mixing piles |
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Application publication date: 20190611 |
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