CN1076064C - Method for handling foundation - Google Patents
Method for handling foundation Download PDFInfo
- Publication number
- CN1076064C CN1076064C CN 95116445 CN95116445A CN1076064C CN 1076064 C CN1076064 C CN 1076064C CN 95116445 CN95116445 CN 95116445 CN 95116445 A CN95116445 A CN 95116445A CN 1076064 C CN1076064 C CN 1076064C
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- concrete
- hole
- foundation
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- kinetic energy
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a method for handling a foundation. The method comprises the steps: holes are formed in the foundation and are filled with an amount of concrete; the concrete is tamped by the strong kinetic energy of a heavy hammer so that the concrete and foundation soil around the holes are tamped; then, the holes are filled with an amount of concrete again; the concrete filled at the second time is tamped by the strong kinetic energy of the heavy hammer so that the concrete and the foundation soil around the hole are tamped; the concrete filling and tamping steps are repeated until the mouths of the holes are filled with the concrete. The present invention is characterized in that dynamic consolidation and chemical consolidation are combined to form a composite foundation so that the bearing capacity of the foundation is greatly improved and the collapsibility or the liquefaction of the foundation can be removed.
Description
The present invention relates to the method that ground is handled in a kind of civil engineering.
Ground in the construction project field is handled, no matter be the pile foundation or the composite foundation of which kind of method construction, though strong point is separately arranged, also has weakness separately.Thus, on design is used, all be subjected to the limitation of oneself.Handle at big thickness and extraordinary ground with saturated yielding, liquefaction, neither one can solve the designing requirement of high-bearing capacity so far, can solve the new method of eliminating saturated yielding, liquefaction again, new stake is planted.
Squeezing into, press the made pile foundations of method such as people, often is not because kinetic energy is little, makes stake not reach designing requirement.Be exactly because kinetic energy is big, stake is interrupted ... bring hidden danger to engineering.Especially the saturated yielding of big thickness, the ground of liquefaction are handled, it will be had no way out!
The composite foundation of all kinds of forms, though it have cost low, improve the soil, improve bearing capacity, eliminate advantages such as saturated yielding, liquefaction, exist equally bearing capacity low, handle the designing requirement that the degree of depth is limited, can not solve high-bearing capacity.High-rise structures in industry and civilian construction, because engineering structures designing requirement height and code requirement are tight, and it not only makes the construction costs height, the duration increases and does not solve engineering foundation hidden danger well.
Pouring concrete pile is because loosened soil, undergauge broken pile and for the elimination existing problems of saturated yielding, liquefaction at the bottom of the hole, thereby is restricted in engineering design.
Pressure injection stake:, but still exist the function of failing to give full play to bearing capacity of pile tip and ground being eliminated saturated yielding, liquefaction though it is brought into play to some extent to pile peripheral friction force.
The borehole expanded bore pile: this stake type, it has the function of high-bearing capacity, but it does not have effect too to the processing of saturated yielding, liquefied foundation, again because of being manually digging hole, often casualty accident occurring, thereby is banned use of.
The feature of comprehensive above various pile foundations and composite foundation, they do not possess the function of existing high-bearing capacity, and the effect of eliminating big thickness saturated yielding, liquefaction is arranged again.
The object of the present invention is to provide a kind of new method for processing foundation, this method can make ground obtain high-bearing capacity, can eliminate saturated yielding, the liquefaction of ground simultaneously.
Above-mentioned purpose of the present invention is to realize by following new method for processing foundation, this method step comprises: pore-forming in ground, in this hole, pour into a certain amount of concrete, utilize weight with strong kinetic energy to above-mentioned a certain amount of concrete tamp make itself and on every side foundation soil body be able to closely knit, in this hole, pour into a certain amount of concrete once more, utilize above-mentioned weight with strong kinetic energy to this concrete that pours into for the second time tamp make itself and on every side foundation soil body be able to closely knitly, repeat above-mentioned concrete and pour into and tamp step till the aperture.
Above-mentioned pore-forming can be to hole by auger to realize, hole depth is 10-40cm.
Above-mentioned pore-forming can be to form by the weight punching.
Above-mentioned pore-forming can be to form by static pressure or vibrations.
Above-mentioned pore-forming is achieved in that promptly on one side use the tension weight churning ground, in the hole that to impact ground form insert reinforced material hole until formation prescribed depth on one side.The advantage of pore-forming mode is one side pore-forming consolidated subsoil on one side like this; Guarantee hole quality simultaneously, the hole of collapsing can not occur.
Can at the bottom of the hole, carry out penetration concrete in addition repeatedly and to the step of its compacting so that form hole base concrete enlarged footing.The advantage of this feature is can form bigger bearing capacity of pile tip by enlarged footing.
Have again, above-mentionedly can realize by strong rammer weight concrete compacting.Its kinetic energy can change to some extent because of different situations, can be 100KNM/M such as it
2
Above-mentioned reinforced material can be plain soil, dregs, dirt.The mixture of above-mentioned material or concrete.
The above-mentioned concrete slump is 0-8cm, can mix active material in the concrete in addition.
Above-mentioned concrete is to contain cement and add sand and/or the compound of stone.
The invention has the advantages that dynamic consolidation and chemocoagulation are combined, can realize the needs of high-bearing capacity, can reach the processing of eliminating big thickness saturated yielding, liquefied foundation again, thereby provide a new tool for the processing of large-scale towering engineering foundation.
In the present invention, owing to given full play to the raising greatly of bearing capacity of pile tip and pile perimeter resistance, make the bearing capacity of pile foundation that bigger raising be arranged.
In the present invention, formed ground had both had the characteristics of rigid foundation, as the bearing capacity height, the characteristics of composite foundation was arranged again, and promptly inter-pile soil is able to closely knitly, and stake forms integral body and bears upper load jointly with inter-pile soil.
In addition, pile shaft material is handled through dynamic compaction, is again hydraulic material simultaneously, therefore has the density height as pile body itself, and the phenomenon of broken pile can not appear in the intensity height.
For the present invention, general stake footpath can be 300-3000mm or larger diameter.
Below in conjunction with accompanying drawing the inventive method is described.
Fig. 1 represents to adopt the composite foundation of the inventive method formation.
As shown in Figure 1, at first adopt spiral drilling machine to form the stake hole, should illustrate why adopt the spiral drilling machine pore-forming here, its advantage is both to have removed the difficult problem of deep foundation drilling construction, overcome the impedance of other method pore-forming again and can guarantee pile quality, the penetration concrete material is also used tamping at the bottom of the hole afterwards, carry out this step repeatedly to form enlarged footing at the bottom of the hole, and then the mode of tamping on one side with one side penetration concrete forms pile body, and can form a plurality of expansion head formation beading shapes along pile body is vertical.Under the effect that weight dashes, pounds, squeezes, presses concrete material, stake end enlarged footing has high-bearing capacity, and the pile body enlarged footing that forms has increased the side friction of stake greatly, so the present invention will have far reaching significance to the big load of large-scale high-rise structures and the pile foundation processing of no bearing stratum.
Claims (6)
1. method for processing foundation, its step comprises: pore-forming in ground, this pore-forming realize like this, use the tension weight churning ground, and meanwhile insert reinforced material in the hole that forms to impacting ground, until the hole that forms prescribed depth; Then, in this hole, pour into a certain amount of concrete, utilize weight, above-mentioned a certain amount of concrete is tamped with strong kinetic energy, make itself and on every side foundation soil body be able to closely knit; In this hole, pour into a certain amount of concrete once more, utilize weight, tamp irritating the concrete that pours into for the second time with strong kinetic energy, make itself and on every side foundation soil body be able to closely knitly, repeat above-mentioned concrete and pour into and tamp step, till the aperture.
2. method according to claim 1 is characterized in that carrying out repeatedly penetration concrete and not rapid to its compacting, so that form hole base concrete enlarged footing at the bottom of the hole.
3. method according to claim 1 is characterized in that above-mentionedly concrete compacting being realized by strong rammer weight this compacting kinetic energy is 10KNM/M
2
4. method according to claim 1 is characterized in that mixture or the concrete of above-mentioned reinforced material for plain soil, dregs, dirt, above-mentioned material.
5. method according to claim 1 is characterized in that the above-mentioned concrete and the slump are in the scope of 0～8cmm, are mixed with active material in it.
6. method according to claim 1 is characterized in that above-mentioned concrete for containing cement, and adds the compound of sand and/or stone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95116445 CN1076064C (en) | 1995-10-04 | 1995-10-04 | Method for handling foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95116445 CN1076064C (en) | 1995-10-04 | 1995-10-04 | Method for handling foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116674A CN1116674A (en) | 1996-02-14 |
| CN1076064C true CN1076064C (en) | 2001-12-12 |
Family
ID=5080863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95116445 Expired - Lifetime CN1076064C (en) | 1995-10-04 | 1995-10-04 | Method for handling foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1076064C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451356B (en) * | 2008-12-30 | 2012-09-05 | 司炳文 | Five in one pre-expansion ecological pile body processing foundation method |
| CN102277867B (en) * | 2011-05-13 | 2013-10-09 | 西安建筑科技大学 | Construction method for collapsible loess foundation |
| CN103306266B (en) * | 2013-06-04 | 2015-12-09 | 北京航空航天大学 | A kind of underground density saline soil post for over-salted soil or strong salinized soil and construction method thereof |
| CN105649074B (en) * | 2016-03-22 | 2019-09-03 | 沙焕焕 | The squeezed concrete stiff composite pile of tubular pole and its construction method |
| CN114775569A (en) * | 2022-04-11 | 2022-07-22 | 井冈山大学 | Method and device for dynamically detecting constraint capacity of civil engineering structure foundation |
-
1995
- 1995-10-04 CN CN 95116445 patent/CN1076064C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1116674A (en) | 1996-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20011212 |
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| EXPY | Termination of patent right or utility model | ||
| DD01 | Delivery of document by public notice |
Addressee: Si Bingwen Document name: Notification of Expiration of Patent Right Duration |