CN109944226A - A kind of vibro-replacement stone pile composite foundation construction method - Google Patents
A kind of vibro-replacement stone pile composite foundation construction method Download PDFInfo
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- CN109944226A CN109944226A CN201910298540.5A CN201910298540A CN109944226A CN 109944226 A CN109944226 A CN 109944226A CN 201910298540 A CN201910298540 A CN 201910298540A CN 109944226 A CN109944226 A CN 109944226A
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Abstract
The present invention provides a kind of vibro-replacement stone pile composite foundation construction methods, it is divided to all piles position to two batches, using the method for the pore-creating piling that successively extended outwardly by center, three vibrating impacter pore-creating simultaneously, so that the pile body of two adjacent construction areas will not generate interaction when pore-creating is driven piles, it ensure that the precision and intensity of stake position, simultaneously by extending centrally out pore-creating, so that not generated compared with noticeable effort between the stake holes of same construction area yet, it ensure that the quality of stake holes, but also the soil layer stress between stake holes is more uniform while improving working efficiency, improve the quality of stake holes, the soft or hard degree of soil layer is judged according to the variation of electric current, and aperture and filler are adjusted according to the difference of soft or hard degree, guarantee that entire pile body all maintains uniform intensity in the soil layer of different soft and hard degree, broken stone pile is selected after accomplishing fluently The graded sand and stone of specification is as mattress layer, so that structure is more stable between pile body and inter-pile soil, composite foundation is firmer.
Description
Technical field
The present invention relates to foundation construction fields, more particularly to a kind of vibro-replacement stone pile composite foundation construction method.
Background technique
Ground refers to the soil body or rock mass of supporting base below building, and the soil layer as building lot is divided into rock, broken
Stone soil, sand, silt, cohesive soil and artificial earth fill, ground has two class of subsoil and artificial foundation's (composite foundation), compound
The method that vibro-replacement stone column is often used when foundation construction carries out foundation stabilization.
Vibro-replacement stone pile composite foundation is a kind of more mature foundation construction method at present, at home and abroad when foundation stabilization
There is use, but when the construction of existing vibro-replacement stone pile composite foundation, what exploration often provided is a rough strata condition,
And specific in practice of construction, strata condition is complicated, and only by the vibro-replacement stone column of survey data completion, often intensity is uneven,
And existing pile-driving method, interaction force is unstable between pile body, be easy to cause the stress between pile body excessive, and then to stake
Body damages, and influences the firmness degree of ground.
Therefore, a kind of vibro-replacement stone pile composite foundation construction method is needed, can be constructed out and be fitted according to actual formation situation
Suitable broken stone pile, and active force is suitable between pile body, pile body is firmer, to solve existing vibro-replacement stone pile composite foundation construction
Broken stone pile strength of the mixing pile made of method is uneven, and active force is unstable between pile body, the problem of composite foundation firmness degree difference.
Summary of the invention
The object of the present invention is to provide a kind of vibro-replacement stone pile composite foundation construction methods, broken to solve above-mentioned existing vibroflotation
Broken stone pile strength of the mixing pile made of stone mar composite foundation construction method is uneven, and active force is unstable between pile body, composite foundation
The problem of firmness degree difference.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of vibro-replacement stone pile composite foundation construction method, the construction method the following steps are included:
(1) prepare: releasing the stake position of respective numbers in construction location according to design drawing, equipment and materials arrival, to setting
It is standby to be debugged；
(2) pore-creating: the region where all piles position is divided into several angularly regions in center, successively by center
Extend outwardly pore-creating, and two batch pore-creating piling are divided in adjacent angularly region, using the pore-creating simultaneously of three vibrating impacters, pore-creating
Vibrating impacter subsidence velocity is 0.5~2.5m/min in journey, and real-time detection vibrating impacter electric current simultaneously records the soft or hard feelings in stratum according to electric current
Condition lifts vibrating impacter when pore-creating reaches predetermined depth, completes pore-creating；
(3) borehole cleaning: proposing aperture for vibrating impacter, then the vibrating impacter that sinks, and repeats 3~5 times, until the mud flowed out in hole becomes
Clearly；
(4) filler: vibrating impacter is promoted to away from 40~70cm of bottom hole, the strata condition recorded when according to pore-creating is into hole
The different rubble of diameter is put into, firm hard formation selects the rubble of 70~100mm of partial size, and broken ground selects 30~50mm of partial size broken
Stone, neutrally the rubble of layer choosing 50~70mm of partial size, each depth of packing are 20~50cm, and sustained vibration keeps filler vibration close,
4~12s of vibration staying after the surge of vibrating impacter electric current；
(5) pile: repeating filler step, until stake top reaches designed elevation；
(6) be laid with mattress layer: whole piles clear up 7~12cm of inter-pile soil to stake top or less, are laid with graded sand after 3~5 days
20~25cm of stone, and roll repeatedly 3~5 times.
Preferably, at the same three stake positions of pore-creating it is adjacent and be located at same angularly region and distribution triangular in shape.
Preferably, while three stake positions of pore-creating are located at mutually non-conterminous three angularly in region.
Preferably, vibrating impacter electric current is 80~100A when pore-creating, and hydraulic pressure is 0.4~0.5MPa, and water is 300~500L/
min。
Preferably, when vibrating impacter is at non-vibroflotation to design aperture in poration process, electric current increases to 100A or more and then remembers
Record is firm hard formation, and electric current does not reach 80A and is then recorded as broken ground, and electric current is then recorded as neutrally between 80~100A
Layer.
Preferably, reaming is carried out to firm hard formation part when pore-creating, makes the 1.1~1.4 of part aperture design aperture
Times.
Preferably, the pore-creating time interval of different batches is 2~4 days.
Preferably, during filler vibration is close, vibrating impacter electric current stress increase to 150~190A.
Preferably, when being laid with mattress layer, the particle size of graded sand and stone should be between 5~30mm, and particle size is 10
The content of~30mm is 60%~75%.
Preferably, the road roller rule that mattress layer rolls is 15t~18t, the speed of travel≤4km/h.
The present invention achieves following advantageous effects compared with the existing technology:
1, a kind of vibro-replacement stone pile composite foundation construction method provided by the invention, by the region where all piles position in
Heart position is divided into several angularly regions, successively extends outwardly pore-creating using by center, and adjacent angularly region is divided to two
The method of a batch pore-creating piling is protected so that the pile body of two adjacent construction areas will not generate interaction when pore-creating is driven piles
The precision and intensity of stake position are demonstrate,proved, while by extending centrally out pore-creating, so that also not producing between the stake holes of same construction area
Life ensure that the quality of stake holes compared with noticeable effort.
2, a kind of vibro-replacement stone pile composite foundation construction method provided by the invention, using three vibrating impacters simultaneously pore-creating,
But also the soil layer stress between stake holes is more uniform while improving working efficiency, the quality of stake holes is improved.
3, a kind of vibro-replacement stone pile composite foundation construction method provided by the invention is judged according to the variation of electric current when pore-creating
The soft or hard degree of soil layer, and aperture and filler are adjusted according to the difference of soft or hard degree, guarantee entire pile body different soft
Uniform intensity is all maintained in the soil layer of hard degree.
4, a kind of vibro-replacement stone pile composite foundation construction method provided by the invention, broken stone pile select appropriate gauge after accomplishing fluently
Graded sand and stone as mattress layer so that structure is more stable between pile body and inter-pile soil, composite foundation is firmer.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is construction process figure in a kind of composite foundation construction method provided by the invention；
Fig. 2 is the pore-creating in batches of embodiment 1 piling schematic diagram in a kind of composite foundation construction method provided by the invention；
Fig. 3 is the pore-creating in batches of embodiment 2 piling schematic diagram in a kind of composite foundation construction method provided by the invention；
Fig. 4 is a kind of composite foundation construction method medium stone stake longitudinal profile structure schematic provided by the invention；
In figure: 1: first batch pore-creating piling, 11: hard soil layer, 12: soft soil horizon, 13: neutral soil layer, 2: second batch
Secondary pore-creating piling.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of vibro-replacement stone pile composite foundation construction methods, by pore-creating in batches, and select
It is driven piles with different size rubble, it is strong to solve broken stone pile pile body made of existing vibro-replacement stone pile composite foundation construction method
Degree is uneven, and active force is unstable between pile body, the problem of composite foundation firmness degree difference.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Embodiment 1:
The present embodiment provides a kind of vibro-replacement stone pile composite foundation construction methods, as shown in Figure 1, Figure 2 and Figure 4, firstly, pressing
The stake position for releasing respective numbers in construction location according to design drawing, the equipment such as required vibrating impacter, hoist engine that will construct and rubble,
The transport of materials that the vibroflotations such as water need is marched into the arena, and equipment is installed to and connect electric water receiving, is debugged to equipment；By all piles position by
Center is that origin is divided into six angularly regions, slings the top of three vibrating impacters to one of them angularly region respectively
Three adjacent studs positions at point, three adjacent studs position distributions triangular in shape can not only improve the efficiency of pore-creating, while three in this way
Platform vibrating impacter pore-creating simultaneously being more uniformly stressed between stake holes when can also ensure that pore-creating avoids poration process to having made
Stake holes causes to damage, while by extending centrally out pore-creating, so that also not generating compared with your writing between the stake holes of same construction area
Firmly, it ensure that the quality of stake holes, vibrating impacter subsidence velocity is 1m/min in poration process, and vibrating impacter current control is in 80A, water
Pressure is 0.45MPa, and water 300L/min, real-time detection vibrating impacter electric current is simultaneously according to the electric current record soft or hard situation in stratum.
Specifically, when vibrating impacter is at non-vibroflotation to design aperture, electric current increases to 100A or more and is then recorded as hardy
Layer 11, electric current does not reach 80A and is then recorded as broken ground 12, and electric current is then recorded as neutral stratum 13 between 80~100A, right
11 part of firm hard formation should carry out reaming, make 1.2 times of part aperture design aperture, filler can be made hardy in this way
11 part of layer can also fill consolidation, and entire pile body is more uniformly stressed.
Further, when pore-creating reaches predetermined depth, lift vibrating impacter, complete pore-creating, will be put on vibrating impacter repeatedly
Heavy 5 times, the mud flowed out becomes clearly in the hole in, completes the cleaning to stake holes, and vibrating impacter is promoted to away from bottom hole 50cm, according to making
The strata condition recorded when hole puts into the different rubble of diameter into hole, and firm hard formation 11 selects the rubble of partial size 80mm, soft
Partial size 40mm rubble is selected on stratum, neutrally the rubble of layer choosing partial size 60mm, and Different Strata selects the rubble of different-grain diameter to make
Pile body more consolidation in the soil layer of surrounding it is firm, molding strength of the mixing pile is more uniform, and allowable stress is bigger, fills out every time
Material is with a thickness of 20cm, and sustained vibration makes filler close, the vibration staying 10s after vibrating impacter electric current increases sharply to 160A of vibration, until stake top reaches
The absolute altitude of design successively extends pore-creating piling from the vertex in angularly region outward, completes one and angularly skips one behind region
A adjacent angularly region continues to drive piles to next angularly region pore-creating, when three non-adjacent angularly regions of completion
When pore-creating, first batch pore-creating piling 1 is completed.
Further, after first batch pore-creating piling 1 is completed 4 days, piling pore-creating is carried out to remaining angularly region, it is real
It is identical as the construction procedure of above-mentioned first batch pore-creating piling 1 to apply step, completes second lot pore-creating piling 2, drives piles in batches
The pile body of two adjacent construction areas will not generate interaction when pore-creating being enabled to drive piles, and ensure that the precision of stake position and strong
Degree.
Further, after second lot pore-creating piling 2 is completed 5 days, inter-pile soil to stake top or less 10cm is cleared up, grade is laid with
With sandstone 20cm as mattress layer, the particle size of graded sand and stone should be between 5~30mm, and particle size is 10~30mm's
Content is 60%~75%, tests the intensity of pile body, the road roller of 18t is selected to be rolled repeatedly 3 times, and speed of travel control exists
4km/h, so that structure is more stable between pile body and inter-pile soil, composite foundation is firmer.
A kind of vibro-replacement stone pile composite foundation construction method provided in this embodiment, by the region where all piles position in
Heart position is divided into several angularly regions, successively extends outwardly pore-creating using by center, and adjacent angularly region is divided to two
The method of a batch pore-creating piling, using the pore-creating simultaneously of three vibrating impacters, three vibrating impacters are located at same angularly region and are in
Adjacent triangular arrangement ensure that so that the pile body of two adjacent construction areas will not generate interaction when pore-creating is driven piles
The precision and intensity of stake position, while by extending centrally out pore-creating so that do not generated between the stake holes of same construction area yet compared with
Noticeable effort ensure that the quality of stake holes, but also the soil layer stress between stake holes is more equal while improving working efficiency
It is even, the quality of stake holes is improved, the soft or hard degree of soil layer is judged according to the variation of electric current, and according to the different device to hole of soft or hard degree
Diameter and filler adjust, and guarantee that entire pile body all maintains uniform intensity, broken stone pile in the soil layer of different soft and hard degree
Select the graded sand and stone of appropriate gauge as mattress layer after accomplishing fluently, so that structure is more stable between pile body and inter-pile soil, it is compound
Ground is firmer.
Embodiment 2:
The present invention provides a kind of vibro-replacement stone pile composite foundation construction method, as shown in figure 3, in pore-creating, three vibroflotations
Device extends outwardly pore-creating piling from the apex in mutually non-conterminous three angularly regions respectively, three mutually it is non-conterminous angularly
Region is done substantially at the same time first batch pore-creating piling 1, then carries out second lot pore-creating piling 2 again in an identical manner, this
Sample equally can be improved working efficiency, and three stake positions of pore-creating simultaneously are apart from farther, and then the interaction force generated is smaller,
It ensure that the strength and stability of pile body.
For the present embodiment in addition to pore-creating piling order is different from embodiment 1, remaining construction method is same as Example 1.
A kind of vibro-replacement stone pile composite foundation construction method provided in this embodiment, by the region where all piles position in
Heart position is divided into several angularly regions, successively extends outwardly pore-creating using by center, and adjacent angularly region is divided to two
The method of a batch pore-creating piling, using the pore-creating simultaneously of three vibrating impacters, three vibrating impacters be located at three it is mutually non-conterminous
Angularly region ensure that stake position so that the pile body of two adjacent construction areas will not generate interaction when pore-creating is driven piles
Precision and intensity, while by extending centrally out pore-creating, so that larger effect is not generated between the stake holes of same construction area yet
Power ensure that the quality of stake holes, but also the soil layer stress between stake holes is more uniform while improving working efficiency, improve
The quality of stake holes, judges the soft or hard degree of soil layer according to the variation of electric current, and to aperture and is filled out according to the different of soft or hard degree
Material adjusts, and guarantees that entire pile body all maintains uniform intensity in the soil layer of different soft and hard degree, after broken stone pile is accomplished fluently
Select the graded sand and stone of appropriate gauge as mattress layer, so that structure is more stable between pile body and inter-pile soil, composite foundation is more
Add firm.
Invention applies a specific example illustrates the principle and implementation of the invention, above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.To sum up, the content of the present specification should not manage
Solution is limitation of the present invention.
Claims (10)
1. a kind of vibro-replacement stone pile composite foundation construction method, it is characterised in that: the construction method the following steps are included:
(1) prepare: releasing the stake position of respective numbers in construction location according to design drawing, equipment and materials arrival, to equipment into
Row debugging；
(2) pore-creating: the region where all piles position is divided into several angularly regions in center, successively outside by center
Extend pore-creating, and two batch pore-creating piling be divided in adjacent angularly region, using three vibrating impacters while pore-creating, in poration process
Vibrating impacter subsidence velocity is 0.5~2.5m/min, and real-time detection vibrating impacter electric current simultaneously records the soft or hard situation in stratum according to electric current, when
When pore-creating reaches predetermined depth, lift vibrating impacter, completes pore-creating；
(3) borehole cleaning: proposing aperture for vibrating impacter, then the vibrating impacter that sinks, and repeats 3~5 times, until the mud flowed out in hole becomes clear；
(4) filler: vibrating impacter is promoted to away from 40~70cm of bottom hole, the strata condition recorded when according to pore-creating is put into hole
The different rubble of diameter, firm hard formation select the rubble of 70~100mm of partial size, and broken ground selects 30~50mm of partial size rubble,
The neutrally rubble of layer choosing 50~70mm of partial size, each depth of packing are 20~50cm, and sustained vibration keeps filler vibration close, wait shake
Rush 4~12s of vibration staying after device electric current increases sharply；
(5) pile: repeating filler step, until stake top reaches designed elevation；
(6) be laid with mattress layer: whole piles clear up 7~12cm of inter-pile soil to stake top or less, are laid with graded sand and stone 20 after 3~5 days
~25cm, and roll repeatedly 3~5 times.
2. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: while pore-creating
Three stake positions it is adjacent and be located at same angularly region in and distribution triangular in shape.
3. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: while pore-creating
Three stake positions are located at mutually non-conterminous three angularly in region.
4. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: vibroflotation when pore-creating
Device electric current is 80~100A, and hydraulic pressure is 0.4~0.5MPa, and water is 300~500L/min.
5. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: in poration process
When vibrating impacter is at non-vibroflotation to design aperture, electric current increases to 100A or more and is then recorded as firm hard formation, and electric current does not reach 80A
It is then recorded as broken ground, electric current is then recorded as neutral stratum between 80~100A.
6. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: to heavily fortified point when pore-creating
Hard formation part carries out reaming, makes 1.1~1.4 times of part aperture design aperture.
7. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: different batches
Pore-creating time interval is 2~4 days.
8. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: filler shakes close
In the process, vibrating impacter electric current stress increase to 150~190A.
9. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: be laid with mattress layer
When, the particle size of graded sand and stone should be between 5~30mm, and particle size is 60%~75% in the content of 10~30mm.
10. a kind of vibro-replacement stone pile composite foundation construction method according to claim 1, it is characterised in that: mattress layer is ground
The road roller rule of pressure is 15t~18t, the speed of travel≤4km/h.
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| CN111270662A (en) * | 2020-03-05 | 2020-06-12 | 安徽安舜水利建设工程有限公司 | Construction method of composite foundation |
| CN111963139A (en) * | 2020-07-08 | 2020-11-20 | 中建四局土木工程有限公司 | Pile foundation rock entering judgment method and system based on drilling machine current |
| CN112442984A (en) * | 2019-09-03 | 2021-03-05 | 杭州鼎锋机械租赁有限公司 | Adaptive pile driver |
| CN114482152A (en) * | 2022-03-04 | 2022-05-13 | 湖南省正邦建设工程有限公司 | Intelligent monitoring system of vibration immersed tube gravel pile machine and construction method |
| CN114763684A (en) * | 2021-01-11 | 2022-07-19 | 新疆北新路桥集团股份有限公司 | Method for building road on soft foundation and road built by method |
| CN114875886A (en) * | 2022-06-09 | 2022-08-09 | 中国电建集团成都勘测设计研究院有限公司 | Construction method of expanding vibroflotation gravel pile |
| CN114908730A (en) * | 2022-06-09 | 2022-08-16 | 中国电建集团成都勘测设计研究院有限公司 | Reinforced vibroflotation gravel pile construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442984A (en) * | 2019-09-03 | 2021-03-05 | 杭州鼎锋机械租赁有限公司 | Adaptive pile driver |
| CN111270662A (en) * | 2020-03-05 | 2020-06-12 | 安徽安舜水利建设工程有限公司 | Construction method of composite foundation |
| CN111963139A (en) * | 2020-07-08 | 2020-11-20 | 中建四局土木工程有限公司 | Pile foundation rock entering judgment method and system based on drilling machine current |
| CN114763684A (en) * | 2021-01-11 | 2022-07-19 | 新疆北新路桥集团股份有限公司 | Method for building road on soft foundation and road built by method |
| CN114482152A (en) * | 2022-03-04 | 2022-05-13 | 湖南省正邦建设工程有限公司 | Intelligent monitoring system of vibration immersed tube gravel pile machine and construction method |
| CN114875886A (en) * | 2022-06-09 | 2022-08-09 | 中国电建集团成都勘测设计研究院有限公司 | Construction method of expanding vibroflotation gravel pile |
| CN114908730A (en) * | 2022-06-09 | 2022-08-16 | 中国电建集团成都勘测设计研究院有限公司 | Reinforced vibroflotation gravel pile construction method |
| CN114875886B (en) * | 2022-06-09 | 2023-04-28 | 中国电建集团成都勘测设计研究院有限公司 | Construction method of expanded diameter vibroflotation gravel pile |
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