CN106120702B - High roadbed artificial foundation back-filling in layers is layered strong rammer composite reinforcement method - Google Patents
High roadbed artificial foundation back-filling in layers is layered strong rammer composite reinforcement method Download PDFInfo
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- CN106120702B CN106120702B CN201610775625.4A CN201610775625A CN106120702B CN 106120702 B CN106120702 B CN 106120702B CN 201610775625 A CN201610775625 A CN 201610775625A CN 106120702 B CN106120702 B CN 106120702B
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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
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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
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention belongs to high roadbed artificial foundation back-filling in layers technical field in architectural engineering, specifically a kind of high roadbed artificial foundation back-filling in layers is layered strong rammer composite reinforcement method.It is as follows：1）Clear table, 2）Original place surface treatment, 3）Excavation and filling interface digs step and handles, and 4）Back-filling in layers mode, 5）It is layered strong rammer.The present invention solves the problems, such as that big high roadbed artificial foundation intractability, long construction period and settlement after construction requirement are high using the technique, and have many advantages, such as that high treating effect, speed of application are fast and residual settlement is small, it is high fill foundation more successful treatment technology means at present.
Description
Technical field
The invention belongs to high roadbed artificial foundation back-filling in layers technical field in architectural engineering, specifically a kind of high roadbed people
Building site base back-filling in layers layering strong rammer composite reinforcement method.
Background technology
Engineering construction industry will generally backfill fill foundation of the height more than 20m and be referred to as high fill foundation, traditional native stone
Side's backfill reinforcement means and method for processing foundation, it is necessary to by the longer dead weight sedimentation time, to exchange the whole of high fill foundation for
Body is stablized, it is impossible to the construction period of engineering construction at present and the requirement of fund period of investment return is adapted to, moreover, traditional approach is for high roadbed
It is restricted in terms of the backfill height and consolidation effect of ground.
Invention content
The present invention provides a kind of high roadbed artificial foundation back-filling in layers layering to solve the restriction that high fill foundation faces
Strong rammer composite reinforcement method.
A kind of high roadbed artificial foundation back-filling in layers is layered strong rammer composite reinforcement method, is suitble to following ground：1st, pass through digging
The high roadbed artificial foundation of ditch earthwork balance formation is filled out on mountain；2nd, the high roadbed artificial foundation to be formed is backfilled by debit；
It is as follows：
1）Clear table：Before construction, surface layer vegetation, fertile soil etc. are carried out to the original ground of high roadbed artificial foundation and are not suitable for material
It is cleared up, is cleared up always to qualified basal plane.
2）Original place surface treatment；According to prospecting report and design requirement, that takes into account foundation bearing capacity requirement and elasticity modulus will
It asks, original ground is handled using processing means such as vibroroller cmpacting, impact-rolling, forced ramming reinforcing mode and composite foundations,
Ensure that processing groundwork bearing capacity and elasticity modulus reach requirement of the high roadbed artificial foundation for original place base, if high roadbed slope
Outside of foot is nearby to have free face along slope slope foot or slope foot, it is impossible to when meeting foundation bearing capacity and stability requirement, using antiskid
Stake and barricade processing.
3）Excavation and filling interface digs step processing：For original ground natural grade suddenly in 1：When 5, carry out original ground and dig at stylobate
Reason excavates the loose table soil of original ground, and it is 1 to make step depth-width ratio：2, introversion inclined-plane 2%, embankment can closely be engaged shape with excavation zone
Integrally, the width of step and height layout parameter according to filling body strong rammer and backfill thickness determines that width is strong not less than 1-2 rows
The distance of tamping point is rammed, is highly a backfill layer thickness.
4）Back-filling in layers mode：When high roadbed artificial foundation fills, it is divided into several layers carry out forced ramming reinforcing；One backfill layer by
Several backfill sub-layers are formed, and backfill the thickness of sub-layer by every sub-layer 1.0m~1.5m；On backfill face by cloth planning distance by
Dump truck discharging, bull-dozer leveling.
5）It is layered strong rammer：Lift height reduces 1m than designing the effective reinforcement depth of strong rammer energy level, each strong to ensure
It rams and reinforces pier body and can extend into bottom backfill layer, form the state being mutually twisted, fully ensure that filling body globality, every layer
After the completion of strong rammer point rams, a full rammer is carried out on surface, the reinforcing on loose surface layer is carried out, reduces settlement after construction.
6）Repeat the 4th）Step and the 5th）Step, until completing the processing work of entire high fill foundation.
Carrying out the 5th）Step, be layered strong rammer when strong rammer energy level with backfill thickness relationship it is as follows,
Carrying out the 5th）Step when being layered strong rammer, takes the arrangement form of the forms such as square or triangle, main rammer
The spacing of point is close with the effective reinforcement depth of corresponding energy level, and the main tamping point spacing of 4000KN.m energy levels is not more than 6m, 6000KN.m
The main tamping point spacing of energy level is not more than 8m, and the main tamping point spacing of 8000KN.m energy levels is not more than 8m, the main tamping point spacing of 12000KN.m energy levels
No more than 11m, the upper and lower main tamping point position of two backfill layer strong rammers will be staggered, so that upper strata backfills layer forced ramming reinforcing pier body and lower floor
Backfill layer forms state ratcheting mutually；Single-point ramming times and the last two control standards hit are proposed simultaneously by designing unit
It is determined through dynamic compaction test.
Carrying out the 5th）Step, when being layered strong rammer, according to high level more than 8000KN.m energy levels and ultra high energy level strong rammer
When, parameter designing is layouted using square, point 2 times completions；Meanwhile among main tamping point, insert a little as the 3rd time tamping point, energy
The more main tamping point of grade reduces 1-2 energy level.
The present invention digs step, back-filling in layers, layering heavy tamping treatment etc. by using original ground basement process, excavation and filling interface
A series of reinforcement techniques, it is ensured that the overall stability of high roadbed artificial foundation, safety, and high roadbed is continuously improved artificially
The filled height of base（Filled height is more than hundred meters at present）So that high roadbed artificial foundation is before building site growing tension
It puts, is conducive to make ground using removing mountain and fill out ditch mode in the bare places such as deserted mountain cheuch region.
Using back-filling in layers, layering strong tamping technology, by adjusting backfilling of earthwork parameter and the parameter of layering strong rammer, and carry out
Variation combination, effectively reinforces high fill foundation so that consolidation effect, foundation bearing capacity and settlement after construction can meet
Design requirement, and have the characteristics that fast, efficient, safe and environmentally friendly.
By earthwork back-filling in layers and the technical combinations of strong rammer energy level, by adjusting different back-filling in layers parameters and difference
Strong rammer parameter, by effective engineering measure, the high roadbed that arbitrary height under current technical status can be handled in principle is artificial
Ground.
It is high to solve big high roadbed artificial foundation intractability, long construction period and settlement after construction requirement using the technique
Problem, and have many advantages, such as that high treating effect, speed of application are fast and residual settlement is small, it is that high fill foundation is relatively more successful at present
Treatment technology means.
Description of the drawings
Fig. 1 is present invention process flow chart；
Fig. 2 is excavation and filling interface structure diagram；
Fig. 3 is the backfill head-up schematic diagram of a backfill sub-layer；
Fig. 4 is the earthwork landfill vertical view of a backfill sub-layer；
Fig. 5 is that layering strong rammer is layouted schematic diagram；
1- strong rammers tamping point in figure, 2- back-filling in layers height, 3- excavation and filling interfaces, 4- mounds, the ground after 5- levelings, 6- are returned
Sub-layer is filled out, one backfills layer strong rammer point, the upper backfill layer strong rammer points of 8- under 7-.
Specific embodiment
A kind of high roadbed artificial foundation back-filling in layers is layered strong rammer composite reinforcement method, is suitble to following ground：1st, pass through digging
The high roadbed artificial foundation of ditch earthwork balance formation is filled out on mountain；2nd, the high roadbed artificial foundation to be formed is backfilled by debit.
Specific implementation method：
1）Carry out filling body lift height and strong rammer energy level, parameter designing.
2）Material thickness is not suitable for according to the vegetation of high roadbed artificial foundation's construction area and surface layer, using backacter
Or bull-dozer is cleared up, fertile soil appointed place is left concentratedly after cleaning.
3）Original place surface treatment：It is distributed according to ground requirement for bearing capacity and special geology, carries out original ground basement process.
4）Excavation and filling interface digs step：It carries out digging step processing using backacter.
5）Back-filling in layers：By each sub-layer thickness planned in advance, using dump truck muck haulage, cloth soil, bull-dozer leveling；Respectively
Sub-layer is successively filled to strong rammer face absolute altitude.
6）It is layered strong rammer：
A. working procedure
Place leveling after ramming that a preparation of construction → time point rams setting-out, measurement place elevation → mono- time point rammer is constructed → mono- time,
Measure place elevation, two times points ram setting-out → bis- time points ram place leveling after construction is rammed for → bis- times, measure place elevation →（It is super
High energy dynamic compaction：Three times plug in rammer setting-outs measure place elevation → tri- time slotting place leveling, measurement place after ramming → tri- times rammers of constructing
Elevation, completely ramming datum line setting-out → full ram is constructed →, place leveling measures place elevation after completely ramming
B forced ramming construction methods
1 main tamping point and reinforcing ramming construction method
1）Clear up smooth construction site.
2）First pass tamping point setting-out is spilt using lime and rams position contour line.
3）Spirit level is set up, spirit level is located at except 50 meters of tamping pit side.
4）Measure tamping point ground elevation.
5）Tamping machine is in place, makes hammer ram center alignment tamping point position, armed lever angle to be adjusted to 65 degree after stable car.
6）It measures peen elevation before ramming and records.
7）Detacher is promoted, calibration falls away from and locks detacher rope capacity.
8）Hammer ram is promoted to predetermined altitude, detacher is opened hammer ram and freely fallen, and put down suspension hook.
9）Measure peen elevation.
10）Repeat step 8）—9）, rammed by the ramming times and control standard, one tamping point of completion of design requirement.
11）Telephone-moving carries out subsequent point and rams, until completing this all over whole tamping points.
12）Tamping pit is filled and led up with bull-dozer, and measures place elevation, marks the position of second time tamping point.
13）Again by above-mentioned steps, gradually complete all to ram pass.
14）Ultra high energy level strong rammer, repeats the above steps, and completes to insert tamping point construction.
2 full ramming construction methods
1）Smooth location.
2）Place elevation is measured, datum line is completely rammed in releasing.
3）Crane is in place, and hammer ram is placed in benchmark line end.
4）The principle that 1/4 is mutually taken according to hammering is rammed point by point, is rammed several 1-2 at every and is hit.
5）It rams by row, completes full ram and construct.
6）Smooth location.
3 last layers are constructed
Notice that the main tamping point position of strong rammer with following backfill layer is staggered during surveying setting-out, so that upper strata backfills layer forced ramming reinforcing
Pier body and lower floor's backfill layer form state ratcheting mutually.
Claims (3)
1. a kind of high roadbed artificial foundation back-filling in layers is layered strong rammer composite reinforcement method, it is characterised in that：It is suitble to following ground：
1st, the high roadbed artificial foundation for filling out ditch earthwork balance by digging mountain and being formed；2nd, the high roadbed to be formed is backfilled by debit artificially
Base；
It is as follows：
1）Clear table：Before construction, surface layer vegetation, fertile soil etc. are carried out to the original ground of high roadbed artificial foundation and are not suitable for material progress
Cleaning, is cleared up always to qualified basal plane；
2）Original place surface treatment；According to prospecting report and design requirement, foundation bearing capacity requirement and the requirement of elasticity modulus are taken into account, is adopted
Original ground is handled with processing means such as vibroroller cmpacting, impact-rolling, forced ramming reinforcing mode and composite foundations, at guarantee
Reason groundwork bearing capacity and elasticity modulus reach requirement of the high roadbed artificial foundation for original place base, if on the outside of high roadbed slope foot
Nearby to have free face along slope slope foot or slope foot, it is impossible to when meeting foundation bearing capacity and stability requirement, using friction pile and gear
Wall processing；
3）Excavation and filling interface digs step processing：For original ground natural grade suddenly in 1：When 5, carry out original ground and dig stylobate processing,
Excavate the loose table soil of original ground, it is 1 to make step depth-width ratio：2, introversion inclined-plane 2%, embankment can closely be engaged to be formed with excavation zone
One, the width of step and height layout parameter according to filling body strong rammer and backfill thickness determines that width arranges strong rammer not less than 1-2
The distance of tamping point is highly a backfill layer thickness；
4）Back-filling in layers mode：When high roadbed artificial foundation fills, it is divided into several layers carry out forced ramming reinforcing；One backfill layer is by several
Backfill sub-layer is formed, and backfills the thickness of sub-layer by every sub-layer 1.0m~1.5m；Plan distance by self-unloading by cloth on backfill face
Automobile discharging, bull-dozer leveling；
5）It is layered strong rammer：Lift height reduces 1m than designing the effective reinforcement depth of strong rammer energy level, to ensure that each strong rammer adds
Gu pier body can extend into bottom backfill layer, the state being mutually twisted is formed, fully ensures that filling body globality, every layer of strong rammer
After the completion of point rams, a full rammer is carried out on surface, the reinforcing on loose surface layer is carried out, reduces settlement after construction；It is strong during layering strong rammer
It rams energy level and the relationship of backfill thickness is as follows,
；
6）Repeat the 4th）Step and the 5th）Step, until completing the processing work of entire high fill foundation.
2. high roadbed artificial foundation back-filling in layers according to claim 1 is layered strong rammer composite reinforcement method, feature exists
In：Carrying out the 5th）Step when being layered strong rammer, takes the arrangement form of the forms such as square or triangle, main tamping point
Spacing is close with the effective reinforcement depth of corresponding energy level, and the main tamping point spacing of 4000KN.m energy levels is not more than 6m, 6000KN.m energy levels
Main tamping point spacing is not more than 8m, and the main tamping point spacing of 8000KN.m energy levels is not more than 8m, and the main tamping point spacing of 12000KN.m energy levels is little
In 11m, the upper and lower main tamping point position of two backfill layer strong rammers will be staggered, so that upper strata backfills layer forced ramming reinforcing pier body and lower floor's backfill
Layer forms state ratcheting mutually；Single-point ramming times and the last two control standards hit are proposed by designing unit and are passed through strong
Experiment is rammed to determine.
3. high roadbed artificial foundation back-filling in layers according to claim 2 is layered strong rammer composite reinforcement method, feature exists
In：Carrying out the 5th）Step, when being layered strong rammer, during according to high level more than 8000KN.m energy levels and ultra high energy level strong rammer, ginseng
Number design is layouted using square, point 2 times completions；Meanwhile among main tamping point, insert a little as the 3rd time tamping point, energy level is relatively led
Tamping point reduces 1-2 energy level.
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| CN109972635A (en) * | 2019-02-26 | 2019-07-05 | 武汉一冶建筑安装工程有限责任公司 | Side slope pastes high roadbed quality in slope and controls construction 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 |
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| CN111622202A (en) * | 2020-05-19 | 2020-09-04 | 民航机场规划设计研究总院有限公司 | Method for filling and detecting boulder by dynamic compaction |
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