CN102619211A - Gradation dynamic compaction processing method using backfill as foundational bearing stratum of foundation - Google Patents
Gradation dynamic compaction processing method using backfill as foundational bearing stratum of foundation Download PDFInfo
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- CN102619211A CN102619211A CN201210106933XA CN201210106933A CN102619211A CN 102619211 A CN102619211 A CN 102619211A CN 201210106933X A CN201210106933X A CN 201210106933XA CN 201210106933 A CN201210106933 A CN 201210106933A CN 102619211 A CN102619211 A CN 102619211A
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- backfill
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Abstract
The invention provides a dynamic compaction processing method to solve the problem that when backfill serves as a foundational bearing stratum of a foundation, the thickness of the backfill is uneven. The unevenness of the backfill thickness means that the thickness of a deep backfill area is 1.5-2.5 times of the thickness of a shallow backfill area. The dynamic compaction processing method is characterized in that the deep backfill area is processed at twice, the shallow backfill area is processed once, during every dynamic compaction process, local compaction is performed firstly twice, and then overall compaction is performed twice. Practices show that the method has remarkable effects, the processed backfill meets requirements of designs, and can be applied to bearing stratums of foundation for buildings and structures, and moreover, the method is economic, feasible, simple in equipment, easy to implement, energy-saving, environment-friendly, capable of guaranteeing quality, wide in application range, small in effect on surrounding constructions, and worthy of recommendation and usage.
Description
Technical field
The present invention relates to the processing method of a kind of backfill, particularly relate to a kind of backfill and reach the processing method of backfill when in uneven thickness more deeply as foundation bearing stratum and the backfill degree of depth as the foundation bearing stratum.
Background technology
In embankment leveling place; When with backfill during as the essential bearing stratum of building or structure; It is in uneven thickness that it fills, and is about 2 times of thin location thickness than depths thickness, and burning into sand gravel cobble and piece stone in the backfill; Bearing capacity of foundation soil is lower, unprocessed unsuitable essential bearing stratum as building or structure.
For guaranteeing workmanship, ensure people's production safety, must handle this backfill.If adopt pile foundation, then chance gravel cobble and piece stone are prone to cause broken pile in the piling process; Fill out the bed course method and handle if adopt to change, change then that to fill out the degree of depth too big, the cost height is uneconomical.In addition, when adopting dynamic compaction to carry out the ground processing, according to " building lot treatment technology standard " (JGJ79-2002),, need the single-rammer energy of employing bigger in the thicker zone of banketing; For example; When ramming processing by force for the zone of thickness about 10-12 rice of banketing; The single-rammer energy that adopts need reach 8000KN.m, and noise is big with vibration in the work progress, and is big to the adjacent structure influence; Be not suitable for from building and the closer zone of structure, be prone to produce disturbance and disturb residents.Therefore seek a kind of effect significantly, economy and facility, equipment is simple, construction is convenient and imperative to the little method for processing foundation of surrounding constructure influence.
Summary of the invention
The object of the present invention is to provide a kind of backfill as foundation bearing stratum and bearing stratum the gradation when in uneven thickness ram processing method by force; During with solution embankment leveling place; It is in uneven thickness that backfill thickness reaches backfill more deeply, is inappropriate for adopting pile foundation and changing filling out the bed course method ground being carried out the Treatment Technology problem.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is following:
A kind of backfill is backfill strong rammer processing method in uneven thickness during as the foundation bearing stratum, and said backfill is in uneven thickness to be meant, be 1.5-2.5 times of more shallow place backfill area thickness than the thickness in depths backfill zone; It is characterized in that, saidly ram processing at twice by force than backfill zone, depths, said more shallow place carries out in the backfill zone once strong the rammer and handles; Each strong rammer is handled and is all carried out a rammer twice earlier, and then carries out full rammer twice.
Saidly ram processing at twice by force, promptly first backfill one half thickness soil layer, the strong rammer once, backfill one half thickness soil layer again, strong again the rammer once.
Preferable, said thickness than depths backfill zone is 10-12 rice, the thickness in said more shallow place backfill zone is 5-6 rice.
Preferable, the single-rammer energy of adopting when said point rams that uses is 4000KN.m; The said single-rammer energy that adopts when completely ramming is 1000KN.m.
Preferable, said point rams and layouts with quincunx, and the cloth dot spacing is 6m * 6m.
Preferable, the number of times of ramming that said point rams satisfies: the last two average ramming volumes that hit are less than 100mm; The said full number of times of ramming that rams satisfies: the last two average ramming volumes that hit are less than 50mm.
Preferable, the said rammer by force at twice when handling, the time interval that the last twice rammed between handling is 7-14 days.
The present invention to backfill during as the foundation bearing stratum backfill zone in uneven thickness ram processing at twice by force.Detect proof through test, method effect of the present invention is remarkable, and the backfill after the processing meets designing requirement, can be used as the essential bearing stratum of building and structure; And this method economy and facility, equipment are simple, construction is convenient, energy-conserving and environment-protective, quality assurance, applied widely, little to surrounding constructure influence, are a kind of method for processing foundation of recommending and using of being worth very much.
Description of drawings
Fig. 1 is certain the Wastewater Treatment Plant's place backfill sketch map among the embodiment 1.
The specific embodiment
The present invention is directed in the embankment leveling place; Backfill thickness is darker and inhomogeneous; Than depths thickness be more shallow place thickness 1.5-2.5 doubly; And burning into sand gravel cobble and piece stone in the soil are inappropriate for adopting pile foundation and changing and fill out the bed course method ground is carried out the Treatment Technology problem, provide a kind of gradation strong processing method of ramming.
When adopting dynamic compaction to carry out the ground processing, (JGJ79-2002) show 6.2.1,, need the single-rammer energy of employing bigger in the thicker zone of banketing according to " building lot treatment technology standard "; In the thinner region of banketing, need the single-rammer energy of employing less.The present invention starts from economy, construction is convenient and reduce the angle consideration to surrounding constructure influence, and the single-rammer energy that adopts when putting rammer is selected based on the thin thickness that bankets; Adopt low-yield ramming when completely ramming, the place topsoil is tamped.
The present invention is directed to as the backfill of foundation bearing stratum situation in uneven thickness: in the thicker zone of backfill, employing the last twice rammed and handled, i.e. backfill one half thickness soil layer, and strong the rammer once, backfill one half thickness soil layer rams once by force more again; In the backfill lower thickness regions, adopt once strong the rammer to finish dealing with.
Backfill described in the present invention is meant in the engineering construction, after the below ground engineerings such as completion basis, returns the soil that tamps again.The soil (its part is mingled with gravel and cobble) that forms with argillaceous sandstone fragment and detrition thereof in the present embodiment is example, but the present invention is not limited thereto.
Further set forth the present invention below in conjunction with embodiment.Should understand; Preferred embodiment provided by the invention; Only be used for illustrating the present invention, and scope of the present invention do not done any restriction, modification and variation that any personnel that are familiar with this technology can realize easily include in the scope of the present invention and accompanying claims.
Embodiment 1:
Certain Wastewater Treatment Plant, its building has complex building 1, auxilliary room 2, dehydration machine room etc., and structure have biochemistry pool 3, sedimentation basin 4, sterilization pool etc.Report is surveyed in the base area; Place the 1. layer 5 be a back fill course, and this backfill is the soil of brick-red argillaceous sandstone fragment and this type of sandstone weathering, broken formation, local burning into sand gravel cobble; Water content 15.8%; Saturation ratio is 60%-75%, and index of plasticity Ip is between 8.3～10.7, and cohesion is 15-20KPa; The 2. layer 6 be farinose argillic horizon, characteristic value of foundation bearing capacity is 180KPa; The 3. layer soil be severely-weathered argillaceous sandstone, characteristic load bearing capacity reaches 400KPa.
This project is embankment leveling place, reaches 10-12 rice at regional backfill degree of depth a such as complex building, auxilliary rooms, is 5-6 rice (seeing accompanying drawing 1) at regional backfill degree of depth b such as biochemistry pool, sedimentation basins.Fill out the bed course method backfill is handled if adopt to change, it is bigger then need to change the soil thickness of filling out in zones such as complex building, auxilliary rooms, and cost is high, and is uneconomical, and treatment effect ideal not necessarily.If the employing pile foundation is then met the gravel cobble and piece stone is prone to cause broken pile.Take all factors into consideration each side's factor, present embodiment adopts the gradation dynamic compaction to carry out ground and handles.In the thicker zones of backfill such as complex building, auxilliary rooms, strong at twice rammer completion, each rammer of point earlier 2 times (putting and adopting single-rammer energy when ramming is 4000KN.m) completely rams 2 times (adopting single-rammer energy when completely ramming is 1000KN.m) again, and ram the degree of depth of banketing by force is 5-6 rice at every turn.In backfill thinner region such as biochemistry pool, sedimentation basins, (point rams 2 times earlier, and adopting single-rammer energy when putting rammer is 4000KN.m to adopt 1 strong rammer completion; Completely ram 2 times, adopting single-rammer energy when completely ramming is 1000KN.m again).
Adopt the 50T crawler type dynamic compaction machinery of 1 W200A to carry out during construction, point rams layouts with quincunx, and the cloth dot spacing is 6m * 6m.When point rams, adopt the cast steel hammer ram, heavy 26t falls apart from being 15.5m, and the hammer ram diameter is 2.5m.Each some rammer end back pushes away tamping pit with 1 the Yellow River 220 bulldozer flat, and be 14 days blanking time between the last twice rammed.
Whenever, ram and the full number of times of ramming that rams satisfies all over point: the last two average ramming volumes that hit were less than 100mm when point rammed, and the last two average ramming volumes that hit are less than 50mm when completely ramming.And the obvious protuberance of the soil body had not reached phenomenons such as hammer difficulty around tamping point should not take place in the work progress.
After the last twice rammer finished for 1 week, this backfill is carried out static sounding and standard penetration test detection, its characteristic value of foundation bearing capacity reaches more than the 180KPa, the interior soil layer modulus of compressibility average Es=8.0Mpa of effective reinforcement depth, and cohesion is 40-50KPa.The result shows that twice Treatment by Dynamic Compaction effect of employing is obvious; Handle the back backfill and meet designing requirement; Can be used as build, the essential bearing stratum of structure, through the test of several years, show and adopt the uneven backfill of gradation Treatment by Dynamic Compaction filling-up thickness to be worthy to be popularized and use.
Claims (6)
1. backfill strong rammer processing method in uneven thickness when a backfill is as the foundation bearing stratum, said backfill is in uneven thickness to be meant, the thickness regional than the depths backfill is 1.5-2.5 times of more shallow place backfill area thickness; It is characterized in that, saidly ram processing at twice by force than backfill zone, depths, said more shallow place carries out in the backfill zone once strong the rammer and handles; Each strong rammer is handled and is all carried out a rammer twice earlier, and then carries out full rammer twice.
2. backfill as claimed in claim 1 is backfill strong rammer processing method in uneven thickness during as the foundation bearing stratum, it is characterized in that, said thickness than depths backfill zone is 10-12 rice, and the thickness in said more shallow place backfill zone is 5-6 rice.
3. backfill as claimed in claim 1 is backfill strong rammer processing method in uneven thickness during as the foundation bearing stratum, it is characterized in that, the single-rammer energy of adopting when said point rams that uses is 4000KN.m; The said single-rammer energy that adopts when completely ramming is 1000KN.m.
4. backfill as claimed in claim 1 is backfill strong rammer processing method in uneven thickness during as the foundation bearing stratum, it is characterized in that, said point rams and layouts with quincunx, and the cloth dot spacing is 6m * 6m.
5. backfill as claimed in claim 1 is backfill strong rammer processing method in uneven thickness during as the foundation bearing stratum, it is characterized in that, the number of times of ramming that said point rams satisfies: the last two average ramming volumes that hit are less than 100mm; The said full number of times of ramming that rams satisfies: the last two average ramming volumes that hit are less than 50mm.
6. the backfill strong rammer processing method in uneven thickness during as the foundation bearing stratum like the arbitrary described backfill of claim 1-5 is characterized in that the time interval that said the last twice rammed between handling is 7-14 days.
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| CN201210106933XA CN102619211A (en) | 2012-04-12 | 2012-04-12 | Gradation dynamic compaction processing method using backfill as foundational bearing stratum of foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644307A (en) * | 2019-09-27 | 2020-01-03 | 中冶成都勘察研究总院有限公司 | Red mudstone tamping backfilling method |
| CN112359856A (en) * | 2020-11-05 | 2021-02-12 | 潍坊弘润新材料有限公司 | Gravity flow method hydraulic filling type foundation treatment construction process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787689A (en) * | 2010-03-26 | 2010-07-28 | 中冶实久建设有限公司 | Forced ramming construction method for high slope filling with Xigeda soil |
| JP2011127287A (en) * | 2009-12-15 | 2011-06-30 | Aomi Construction Co Ltd | Construction method and apparatus for compacting subaqueous mound |
-
2012
- 2012-04-12 CN CN201210106933XA patent/CN102619211A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011127287A (en) * | 2009-12-15 | 2011-06-30 | Aomi Construction Co Ltd | Construction method and apparatus for compacting subaqueous mound |
| CN101787689A (en) * | 2010-03-26 | 2010-07-28 | 中冶实久建设有限公司 | Forced ramming construction method for high slope filling with Xigeda soil |
Non-Patent Citations (1)
| Title |
|---|
| 王国胜等: "强夯法在碎石填土地基处理中的应用", 《岩石力学与工程学报》, vol. 16, no. 02, 30 April 1997 (1997-04-30) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644307A (en) * | 2019-09-27 | 2020-01-03 | 中冶成都勘察研究总院有限公司 | Red mudstone tamping backfilling method |
| CN112359856A (en) * | 2020-11-05 | 2021-02-12 | 潍坊弘润新材料有限公司 | Gravity flow method hydraulic filling type foundation treatment construction process |
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Address after: 200092, room 1121, No. two, 801 North Road, Zhongshan, Shanghai, Yangpu District Applicant after: SHANGHAI CITIC WATER INDUSTRY CO., LTD. Address before: 200092, room 1121, No. two, 801 North Road, Zhongshan, Shanghai, Yangpu District Applicant before: Shanghai Yatong Environmental Protection Industrial Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHANGHAI YATONG ENVIRONMENTAL PROTECTION INDUSTRIAL CO., LTD. TO: SHANGHAI ZHONGXIN WATER INDUSTRY CO., LTD. |
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Application publication date: 20120801 |