CN108914912A - A kind of Foundation Treatment engineering method of column-hammer forced tamping displacement - Google Patents
A kind of Foundation Treatment engineering method of column-hammer forced tamping displacement Download PDFInfo
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- CN108914912A CN108914912A CN201810777180.2A CN201810777180A CN108914912A CN 108914912 A CN108914912 A CN 108914912A CN 201810777180 A CN201810777180 A CN 201810777180A CN 108914912 A CN108914912 A CN 108914912A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of Foundation Treatment engineering methods of column-hammer forced tamping displacement, according to the geological conditions of different engineerings, select different displacement material and dynamic pressure equivalent, quasi- structure foundation is carried out to ram pore-forming, backfill tamping pit is carried out using industrial waste aggregate, local discarded native stone or gravel mixture, discarded building waste, repeatedly rams and backfills, last low hammer cape rammer, the closely knit displacement pier body for meeting ground is formed, is achieved the purpose that ground mollisol body consolidation process.The present invention carries out ramming hole filling as displacement material using dead meal, while reducing environmental pollution, greatlys save engineering cost；Entire construction improves soil stabilization depth, soil bearing capacity, has a wide range of application, and has good social and economic benefit.
Description
Technical field
The present invention relates to a kind of Foundation Treatment engineering methods of column-hammer forced tamping displacement, belong to foundation treatment technology field.
Background technique
Basement process (foundation treatment) generally refers to ground (soil or rock for improving bearing building
Stone) bearing capacity or improve its deformation properties or penetration property and the project slash taken.Foundation dynamic compaction handles conduct
The based process often implemented in basement process, according to reinforcement principle, applicable elements and construction technology can be divided into heavy-tamping method and
Heavy tamping replacement method.Heavy-tamping method, which refers to, rams soil layer by certain altitude whereabouts using weight, improves the bearing capacity in place, is suitable for place
The processing for managing the grounds such as gravelly soil, sand, unsaturation fine grained soil, collapsible loess, plain fill and miscellaneous fill, to containing good saturating
The saturated fine grained soil ground of aqueous interlayer should be by using after test.Heavy tamping replacement method is the weight impact because ground is too soft
While, the filler of adapted better performances squeezes into ground by force, and present foundation soil is displaced, and is suitable for processing high saturation
Silt and soft modeling shape the grounds such as mud, muck soil, cohesive soil, for requiring in not tight engineering Deformation control.Afterwards
Person is replaced using the filler of better performances and is squeezed into, at high cost.
However, with the fast development in city, industrial waste aggregate, is discarded local discarded native stone or gravel mixture
Building waste etc. it is more and more, these wastes are directly dumped together, do garbage disposal, cause the pollution of environment.Cause
This, studying one kind can be current urgent need solution by the construction method that foundation replacement cost is fallen and reduced in above-mentioned offal treatment
Certainly the problem of.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of Foundation Treatment works of column-hammer forced tamping displacement
Method can reduce environmental pollution, and save engineering cost, improve soil stabilization depth, soil bearing capacity, widen application range.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of Foundation Treatment engineering method of column-hammer forced tamping displacement, the Foundation Treatment engineering method of column-hammer forced tamping displacement is root
According to the geological conditions of different engineerings, different displacement material and dynamic pressure equivalent are selected, quasi- structure foundation is carried out to ram pore-forming, is adopted
Backfill tamping pit is carried out with industrial waste aggregates, local discarded native stone or gravel mixture, discarded building waste, is repeatedly rammed
And backfill, last low hammer cape rammer form the closely knit displacement pier body for meeting ground, reach the mesh to ground mollisol body consolidation process
's.
The process flow of the Foundation Treatment engineering method of above-mentioned column-hammer forced tamping displacement is specific as follows：
Step 1: levelling of the land：Cleaning and smooth construction site are loose ground or silt matter soil for surface layer, are laid with one
The sandstone construction cushion coat of thickness degree 1-2mm；Place level of ground water is higher, takes dewatering measure, is lower than level of ground water and applies rammer
Face 2m；
Step 2: surveying site elevation：Repetition measurement site elevation carries out construction survey record；
First pass tamping point is set Step 3: putting：First pass tamping point position is marked by design drawing requirement ground on the scene, tamping point is used
Lime marks, so that hammer ram is in place；
Step 4: tamping machine, hammer are in place：Crane is in place, and hammer ram is made to be directed at tamping point position；
Step 5: determining hammer ram drop height degree：Peen elevation before measurement is rammed；
Step 6: applying rammer, hammer ram settling amount is measured, cheats interior filler：Compacted strong rammer column hammer is hung into scheduled height, is opened
Tripping gear, after column hammer breaks off relations and freely falls, measurement rams rear pillar peen elevation for the first time, if discovery makes because cheating slanted floor
Column hammer skew, it should stop to ram and fill to reload into hole to keep hole bottom smooth；
Step 7: applying rammer again：The pier body for repeating backfill design in step six-way hole replaces material, by ramming for design code
Number and receipts hammer control standard complete ramming for the tamping point；
Step 8: changing tamping point applies rammer：According to sequence, telephone-moving to another tamping point from inside to outside, step 4 is repeated to step 7,
Complete ramming for first pass whole tamping point；
Step 9: tamping pit is filled and led up：Tamping pit is pushed away with bull-dozer and fills and leads up absolute altitude that is whole, and measuring place；
Step 10: second time point rams：Measurement, which is put, sets second time tamping point position, after predefined time intervals according to the above method
Whole tamping points are subjected to column hammer compacting, form compacting pier body；
Step 11: full ram：It is bulldozed place with bull-dozer, then place is completely rammed twice with common enlarging hammer, first pass is clicked
It can be 100tm, ram print overlap joint, continuous two hit；Interval starts to ram for second time after 3 days, and first pass, which is clicked, to be 80tm,
Print overlap joint 1/3 is rammed, place soil working is tamped, and measures the place elevation after ramming；
Step 12: detection：It being detected using loading test, detection time is no less than sticky knoll body material 28 days,
Gravelly soil and sandstone knoll body are no less than 7 days.
Preferably, the compacted strong rammer column hammer in step 6 refers to that diameter is 1000mm, and height 2000mm, weight is 12T's
Column hammer.
Preferably, the defined number of ramming hits for 2-4, and the receipts hammer control standard is the amount of clicking
1200knm, the ramming volume that is finally averaged twice are less than or equal to 200mm.
Preferably, the predetermined time interval in step 10 is no less than 3 days.
The present invention arranges column hammering blow stake position by Design Requirement Drawing in the place for needing foundation stabilization, is hammered into shape point by point using column
It rams pore-forming and filler is rammed to form stub (point twice of completion), surface layer is completely rammed twice with enlarging hammer, form compound foundation.This is reinforced
Technology is to improve the mechanical property of soil layer up and down using dynamic consolidation principle, accelerates the discharging consolidation of substrate Soft Soil Layer, improves ground
Base soil intensity, meets the load requirement of upper building, it is desirable that single pier bearing capacity meet within the scope of the substrate of processing compoundly
Base bearing capacity reaches design requirement；Increase the effective reinforcement depth of deep ground earth density and processing.
Construction of the invention has such as with compared with condition heavy-tamping method and heavy tamping replacement method and other processing techniques
Lower advantage：
1, soil bearing capacity can be improved 40%-150%, and soil stabilization depth can be improved 1-2 times, dynamic replacement bottom depth
Up to 10m；
2, Industry Waste aggregate and local cheap soil-stone material can be used in engineering method displacement material, can also be useless using city
That abandons tears room building waste open, while reducing environmental pollution, so that engineering cost is greatlyd save, with other reinforcement techniques and stake
Base construction technology is compared, and the 20%-60% of foundation engineering reinforcement cost can be saved,；
3, the engineering method simple process, intuitive, consolidation effect is reliable, and easy for construction, mechanization degree is high, and construction efficiency is high,
A large amount of human resources can be saved, labor intensity is reduced, the shortening construction period can shorten work compared with similar method for processing foundation
Phase 20%-50% has good social and economic benefit.
4, can also foundation soil be accelerated to consolidate, using the coarse aggregates filler such as soil-stone material or building waste as displacement material
When, it is equivalent to form the draining shaft being relatively large in diameter, accelerates lower layer compared with the infiltration discharge of moisture in weak soil, accelerate the soil body solid
Knot effect, to improve foundation bearing capacity.
5, construction civilization, scene is clean and tidy, and working security is high, and when construction is discharged without exhaust gas, meets the requirement of environmental protection.
6, this construction can be used to handle boulder banket, the clay of high saturated sand, moisture content≤40%, thickness
Biggish element clay, thickness little silt matter or muck soil, soft modeling to plastic general clay, architectural waste aggregate earth fill etc.
Ground；Most probably in multilayer to high-rise all types of industries and civil buildings and to settlement difference control more demanding building,
Water conservancy and the foundation engineering of highway facilities etc..
Specific embodiment
The present invention will be described in detail With reference to embodiment, it is to be understood that protection scope of the present invention is simultaneously
It is not restricted by specific implementation.
A kind of Foundation Treatment engineering method of column-hammer forced tamping displacement provided in an embodiment of the present invention, the ground of column-hammer forced tamping displacement
It is different displacement material and dynamic pressure equivalent to be selected, to quasi- building according to the geological conditions of different engineerings that base, which handles construction,
Ground carries out ramming pore-forming, using industrial waste aggregate, local discarded native stone or gravel mixture, discarded building waste into
Row backfill tamping pit, repeatedly rams and backfills, and last low hammer cape rammer forms the closely knit displacement pier body for meeting ground, reaches to ground
The purpose of soft soil body consolidation process.Wherein, displacement material can be industrial waste aggregate, local discarded native stone or gravel mixing
One or more any combination of material, discarded building waste.
The process flow of the Foundation Treatment engineering method of above-mentioned column-hammer forced tamping displacement is as follows：
Step 1: levelling of the land：Cleaning and smooth construction site are loose ground or silt matter soil for surface layer, are laid with one
The sandstone construction cushion coat of thickness degree 1-2mm；Place level of ground water is higher, takes dewatering measure, is lower than level of ground water and applies rammer
Face 2m；
Step 2: surveying site elevation：Repetition measurement site elevation carries out construction survey record；
First pass tamping point is set Step 3: putting：First pass tamping point position is marked by design drawing requirement ground on the scene, tamping point is used
Lime marks, so that hammer ram is in place；
Step 4: tamping machine, hammer are in place：Crane is in place, and hammer ram is made to be directed at tamping point position；
Step 5: determining hammer ram drop height degree：Peen elevation before measurement is rammed；
Step 6: applying rammer, hammer ram settling amount is measured, cheats interior filler：It is 1000mm, height 2000mm by diameter, weight is
The compacted strong rammer column hammer of 12T hangs scheduled height, opens tripping gear, and after column hammer breaks off relations and freely falls, measurement is for the first time
Rear pillar peen elevation is rammed, if discovery makes column hammer skew because cheating slanted floor, should stop to ram and fill to reload into hole to make to cheat bottom
It is smooth；
Step 7: applying rammer again：The pier body for repeating backfill design in step six-way hole replaces material, rams number by what 2-4 was hit
And the receipts hammer control standard of the amount of clicking 1200knm and the last ramming volume that is averaged twice less than or equal to 200mm completes the tamping point
It rams；
Step 8: changing tamping point applies rammer：According to sequence, telephone-moving to another tamping point from inside to outside, step 4 is repeated to step 7,
Complete ramming for first pass whole tamping point；
Step 9: tamping pit is filled and led up：Tamping pit is pushed away with bull-dozer and fills and leads up absolute altitude that is whole, and measuring place；
Step 10: second time point rams：Measurement, which is put, sets second time tamping point position, by upper after no less than 3 days time intervals
It states method and whole tamping points is subjected to column hammer compacting, form compacting pier body；
Step 11: full ram：It is bulldozed place with bull-dozer, then place is completely rammed twice with common enlarging hammer, first pass is clicked
It can be 100tm, ram print overlap joint, continuous two hit；Interval starts to ram for second time after 3 days, and first pass, which is clicked, to be 80tm,
Print overlap joint 1/3 is rammed, place soil working is tamped, and measures the place elevation after ramming；
Step 12: detection：This method generally only considers the detection of pier body, is detected using loading test, when detection
Between sticky knoll body material is no less than 28 days, gravelly soil and sandstone knoll body are no less than 7 days.
The quality standard of entire construction can refer to following table：
Using：Shandong steel enterprise sunshine steel two 220kV substation projects of Quality Products Base, 3 layers of steel reinforced concrete frame
Frame engineering, area are 1500 ㎡, and the load of receiving is bigger, and since this project under construction is close to seashore, geological conditions is poor, design
Ground is handled using above-mentioned method, displacement material is using discarded brickbat, sandstone mixture, after being handled using this method, through original
Position detection its characteristic load bearing capacity fak reaches 180kpa, effective reinforcement depth 4-10m.This engineering method of this engineering utilization saves greatly
Amount investment, has saved fund, has shortened the duration, achieved preferable Social benefit and economic benefit.
The present invention arranges column hammering blow stake position by Design Requirement Drawing in the place for needing foundation stabilization, is hammered into shape point by point using column
It rams pore-forming and filler is rammed to form stub (point twice of completion), surface layer is completely rammed twice with enlarging hammer, form compound foundation.This is reinforced
Technology is to improve the mechanical property of soil layer up and down using dynamic consolidation principle, accelerates the discharging consolidation of substrate Soft Soil Layer, improves ground
Base soil intensity, meets the load requirement of upper building, it is desirable that single pier bearing capacity meet within the scope of the substrate of processing compoundly
Base bearing capacity reaches design requirement；Increase the effective reinforcement depth of deep ground earth density and processing.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.
Claims (5)
1. a kind of Foundation Treatment engineering method of column-hammer forced tamping displacement, which is characterized in that the basement process of column-hammer forced tamping displacement is applied
Work engineering method is to select different displacement material and dynamic pressure equivalent according to the geological conditions of different engineerings, is carried out to quasi- structure foundation
Pore-forming is rammed, backfill rammer is carried out using industrial waste aggregate, local discarded native stone or gravel mixture, discarded building waste
Hole, repeatedly rams and backfills, and last low hammer cape rammer forms the closely knit displacement pier body for meeting ground, reaches to ground mollisol body
The purpose of consolidation process.
2. a kind of Foundation Treatment engineering method of column-hammer forced tamping displacement according to claim 1, which is characterized in that column hammer is strong
The process flow for ramming displaced Foundation Treatment engineering method is as follows：
Step 1: levelling of the land：Cleaning and smooth construction site are loose ground or silt matter soil for surface layer, are laid with a thickness
Spend the sandstone construction cushion coat of 1-2mm；Place level of ground water is higher, takes dewatering measure, is lower than level of ground water and applies rammer face 2m；
Step 2: surveying site elevation：Repetition measurement site elevation carries out construction survey record；
First pass tamping point is set Step 3: putting：First pass tamping point position, tamping point lime are marked by design drawing requirement ground on the scene
It marks, so that hammer ram is in place；
Step 4: tamping machine, hammer are in place：Crane is in place, and hammer ram is made to be directed at tamping point position；
Step 5: determining hammer ram drop height degree：Peen elevation before measurement is rammed；
Step 6: applying rammer, hammer ram settling amount is measured, cheats interior filler：Compacted strong rammer column hammer is hung into scheduled height, opens and breaks off relations
Device, after column hammer breaks off relations and freely falls, measurement rams rear pillar peen elevation for the first time, if discovery hammers column into shape because cheating slanted floor
Skew, it should stop to ram and fill to reload into hole to keep hole bottom smooth；
Step 7: applying rammer again：Repeat step six-way hole in backfill design pier body replace material, by design code ram number and
It receives hammer control standard and completes ramming for the tamping point；
Step 8: changing tamping point applies rammer：According to sequence, telephone-moving to another tamping point from inside to outside, step 4 is repeated to step 7, is completed
First pass whole tamping point is rammed；
Step 9: tamping pit is filled and led up：Tamping pit is pushed away with bull-dozer and fills and leads up absolute altitude that is whole, and measuring place；
Step 10: second time point rams：Measurement, which is put, sets second time tamping point position, after predefined time intervals according to the above method will be complete
Portion's tamping point carries out column hammer compacting, forms compacting pier body；
Step 11: full ram：It is bulldozed place with bull-dozer, then place is completely rammed twice with common enlarging hammer, first pass, which is clicked, to be
100tm rams print overlap joint, and continuous two hit；Interval starts to ram for second time after 3 days, and first pass, which is clicked, to be 80tm, rams print
Overlap joint 1/3, place soil working is tamped, and measures the place elevation after ramming；
Step 12: detection：It is detected using loading test, detection time is no less than sticky knoll body material 28 days, to broken
Stone soil and sandstone knoll body are no less than 7 days.
3. a kind of Foundation Treatment engineering method of column-hammer forced tamping displacement according to claim 2, which is characterized in that step 6
In compacted strong rammer column hammer refer to diameter be 1000mm, height 2000mm, weight be 12T column hammer into shape.
4. a kind of Foundation Treatment engineering method of column-hammer forced tamping displacement according to claim 2, which is characterized in that the rule
Fixed number of ramming hits for 2-4, and the receipts hammer control standard is the amount of clicking 1200knm, and the ramming volume that is finally averaged twice is less than etc.
In 200mm.
5. a kind of Foundation Treatment engineering method of column-hammer forced tamping displacement according to claim 2, which is characterized in that step 10
In predetermined time interval be no less than 3 days.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206054A (en) * | 2019-05-05 | 2019-09-06 | 中铁建工集团有限公司 | A kind of power transmission line safety zone basement process optimization method |
| CN110318385A (en) * | 2019-06-25 | 2019-10-11 | 青岛即城市政园林工程有限公司 | A kind of weak subgrade forced ramming construction method |
| CN110344387A (en) * | 2019-07-17 | 2019-10-18 | 中冶沈勘工程技术有限公司 | The effective reinforcement depth design method of dynamic compaction reinforced saturated sand foundation |
| CN111535291A (en) * | 2020-05-08 | 2020-08-14 | 重庆三峡地质工程技术有限公司 | Dynamic compaction treatment process for geological structure |
| CN111576384A (en) * | 2020-05-18 | 2020-08-25 | 中国化学工程重型机械化有限公司 | Construction method of high-energy-level dynamic compaction |
| CN111648354A (en) * | 2020-05-22 | 2020-09-11 | 河南省第八建设集团有限公司 | Construction method of SDDC pile-ground structure |
| CN113235552A (en) * | 2021-05-27 | 2021-08-10 | 中交基础设施养护集团有限公司 | Method for filling roadbed by using large-diameter broken stone through dynamic compaction |
| CN113463609A (en) * | 2021-04-06 | 2021-10-01 | 山西机械化建设集团有限公司 | Method for treating deep saturated soft soil foundation by 'relay type' dynamic compaction replacement |
| CN115387320A (en) * | 2022-08-02 | 2022-11-25 | 济南黄河路桥建设集团有限公司 | Rocket hammer column ramming and full ramming combined construction method |
| CN117802965A (en) * | 2024-02-23 | 2024-04-02 | 中大(天津)建设集团有限公司 | Construction process of stable engineering foundation |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206054A (en) * | 2019-05-05 | 2019-09-06 | 中铁建工集团有限公司 | A kind of power transmission line safety zone basement process optimization method |
| CN110318385A (en) * | 2019-06-25 | 2019-10-11 | 青岛即城市政园林工程有限公司 | A kind of weak subgrade forced ramming construction method |
| CN110344387A (en) * | 2019-07-17 | 2019-10-18 | 中冶沈勘工程技术有限公司 | The effective reinforcement depth design method of dynamic compaction reinforced saturated sand foundation |
| CN111535291A (en) * | 2020-05-08 | 2020-08-14 | 重庆三峡地质工程技术有限公司 | Dynamic compaction treatment process for geological structure |
| CN111576384A (en) * | 2020-05-18 | 2020-08-25 | 中国化学工程重型机械化有限公司 | Construction method of high-energy-level dynamic compaction |
| CN111648354A (en) * | 2020-05-22 | 2020-09-11 | 河南省第八建设集团有限公司 | Construction method of SDDC pile-ground structure |
| CN113463609A (en) * | 2021-04-06 | 2021-10-01 | 山西机械化建设集团有限公司 | Method for treating deep saturated soft soil foundation by 'relay type' dynamic compaction replacement |
| CN113463609B (en) * | 2021-04-06 | 2023-03-03 | 山西机械化建设集团有限公司 | Method for treating deep saturated soft soil foundation by 'relay type' dynamic compaction replacement |
| CN113235552A (en) * | 2021-05-27 | 2021-08-10 | 中交基础设施养护集团有限公司 | Method for filling roadbed by using large-diameter broken stone through dynamic compaction |
| CN115387320A (en) * | 2022-08-02 | 2022-11-25 | 济南黄河路桥建设集团有限公司 | Rocket hammer column ramming and full ramming combined construction method |
| CN117802965A (en) * | 2024-02-23 | 2024-04-02 | 中大(天津)建设集团有限公司 | Construction process of stable engineering foundation |
| CN117802965B (en) * | 2024-02-23 | 2024-05-07 | 中大(天津)建设集团有限公司 | Construction process of stable engineering foundation |
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