CN103015394B - A kind of friction without casting compaction processing method of soft foundation - Google Patents
A kind of friction without casting compaction processing method of soft foundation Download PDFInfo
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- CN103015394B CN103015394B CN201210493278.8A CN201210493278A CN103015394B CN 103015394 B CN103015394 B CN 103015394B CN 201210493278 A CN201210493278 A CN 201210493278A CN 103015394 B CN103015394 B CN 103015394B
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Abstract
The present invention provides the self-advancing type of a kind of soft foundation without casting friction compaction processing method, and the method is first in soft foundation intends process range, determines the stake holes arrangement of compaction, stake holes diameter, stake holes spacing and processes the degree of depth；At center, each stake holes position, carry out pretreatment again form pilot hole；Then use self-advancing type without casting friction compaction device, pilot hole carry out the horizontal reducing of continuous print and vertically get into, make surrounding soil by the most compacted and formed and design aperture and the compacted pore-forming of hole depth.The method that the present invention processes soft foundation is simple, friction, and efficiency is high, and quality is good；The self-advancing type used is simple without casting friction compaction apparatus structure, small, light and flexible, is particularly well-suited to little space, the loess of the narrow and small and strict construction site controlling vibration, the compaction of the soft foundation such as banket process.
Description
Technical field
The invention belongs to stiffening basic ground technical field, relate to the ground extruding processing method of a kind of soft foundation, particularly relate to a kind of little space, narrow and small area, strict control vibration construction site such as loess, the processing method of vibration-free compaction without casting of the soft foundation such as banket.
Background technology
Loess, compressibility is high, intensity is low, immersion easily occurs the shortcomings such as Collapsing Deformation, so must process soft foundation before construction because it has for the mollisol such as banket.Fast development along with Chinese society economy, railway, highway, house etc. are built grade and are constantly promoted, requirement to the control technique of settlement after construction is stricter, especially in little space, narrow and small, strict control vibration soft foundation construction site, existing processing method is subject to certain restrictions, and cannot meet high standard requirement.
Soft foundation construction site, little space, such as loess tunnel, construction permissible height and width requirement are respectively smaller than 6.7m, 7.8m, existing work China Democratic National Construction Association of mollisol district, ancient building stiffening basic ground in, construction permissible height is less than 3m, and this just requires that corresponding construction equipment realizes miniaturization.Narrow and small soft foundation construction site, as being positioned at the groups of building of down town, when carrying out the consolidation process of loess, the soft foundation such as banket, construction site is affected by Adjacent Buildings or structures and the narrowest and small.When the narrowest and small place carries out the compaction of foundation soil, construction equipment needs small and exquisite flexible, easily operated, and construction interference is little.The strict soft foundation construction site controlling vibration, as passed through the railway tunnel of loess formation, vcehicular tunnel excavates because of the hole body in construction, makes the original stress of the soil body perturbed, and the vibration in construction easily causes tunnel soil body destruction, mountain body cracking, landslide；In urban construction, the main harm of vibration shows as the impact on building safety, and impact on human comfort in indoor environment.Therefore, having the strict construction site controlling and requiring to vibration, the existing processing method using the jump bit of percussing and crushing, vibreatory hammer, diesel hammer piling machine etc. to have larger vibration is subject to certain restrictions or the most applicable.
Summary of the invention
It is an object of the invention to for problems of the prior art and defect, it is provided that the processing method of vibration-free compaction without casting of a kind of soft foundation.
The processing method of vibration-free compaction without casting of soft foundation of the present invention, comprises the following steps that:
(1) stake holes arrangement and the determination of design parameter: in soft foundation intends process range, determine compaction layer thickness, stake holes arrangement, stake holes diameter, stake holes spacing and the stake holes degree of depth according to the related specifications standard such as " Code for building construction in collapsible loess zone ", " building foundation treatment technical specification ", " railway engineering foundation treatment technology code " and practical situation.
(2) casting vibration-free compaction pore-forming
At center, each stake holes position, first carry out pretreatment form pilot hole；Use self-advancing type without casting vibration-free compaction device, pilot hole carry out the horizontal reducing of continuous print and vertically get into again, make surrounding soil by the most compacted and form design aperture and the compacted pore-forming of hole depth.
The degree of depth of described pilot hole, diameter respectively not less than self-advancing type without casting friction compaction device length, soil compaction cone diameter.
The perpendicularity deviation of described pilot hole is not more than l%；Described self-advancing type without the effective depth of casting vibration-free compaction device not less than the degree of depth of pilot hole.
The perpendicularity deviation of described stake holes is not more than 1.5%.
(3) form compound foundation: after compacted pore-forming, placement in layers or irrigate into pile material in hole, and extrude or vibration compacting, make pile body and be collectively forming composite foundation by compacted inter-pile soil.
In order to improve the bearing capacity of ground further, compacted hole carries out the construction of bearing capacity pile foundation, form high-bearing capacity pile foundation.
Described self-advancing type without casting vibration-free compaction device, including taper frame and with the taper frame hydraulic cylinder by Flange joint, and be provided with suspension ring at the top of hydraulic cylinder；It is provided with power cone in described taper frame, and power cone tail end is connected with the piston rod of hydraulic cylinder；Taper frame periphery is movably set with matched soil compaction blade, and is movably set with grave mound blade in the junction of soil compaction blade outboard；It is provided with slide block on described soil compaction blade, and slide block is connected through the gathering sill being arranged in taper frame and power tapered joint are tactile；The vertex of a cone of described power cone is connected by connecting rod has soil compaction to bore.
Being provided with dovetail groove on described power cone, described slide block slides in this dovetail groove.
Described hydraulic cylinder is externally provided with casing.
Described power cone at least two, and superposition the most in the same direction.
The present invention has the advantage that relative to prior art
1, the present invention uses self-advancing type carry out the horizontal reducing of continuous print without casting vibration-free compaction device and vertically get into, soil compaction pore-forming is realized by the way of static pressure, make the original loess in the range of basement process, the degree of compaction of mollisol such as banket strengthens, bearing power increase, settlement by soaking eliminates, and by filling or irrigate semi-steel one-tenth pile material pile in compacted hole, form compound foundation, thus improve loess, the bearing capacity of soft foundation and control the post-construction deformation of ground such as banket, meet loess tunnel, existing work China Democratic National Construction Association, the construction space requirement in the little space such as ancient building, also the construction requirement of the narrow and small places such as groups of building in down town can be met.
2, not casting when the present invention constructs, friction, noiselessness, little space, narrow and small area, the loess of the strict construction site controlling vibration, the compaction of the soft foundation such as banket can be met.
3, the present invention is stretched downwards by the most expanding and soil compaction cone of soil compaction blade, it is achieved that disposably reaching in work progress to design aperture and design hole depth, efficiency of construction is high, and quality is good.
Accompanying drawing explanation
Fig. 1 is the present invention schematic diagram without casting vibration-free compaction processing method；
Fig. 2 is the self-advancing type of the present invention vertical cross section figure without casting vibration-free compaction device；
Fig. 3 is the self-advancing type of the present invention view in transverse section without casting vibration-free compaction device；
Fig. 4 is that self-advancing type of the present invention is without casting vibration-free compaction device working state figure.
Detailed description of the invention
Below by specific embodiment, self-advancing type of the present invention is described in detail without the structure of casting vibration-free compaction device and the processing method of vibration-free compaction without casting of soft foundation.
1, self-advancing type is without casting vibration-free compaction device
Self-advancing type involved in the present invention, without casting vibration-free compaction device, passes through, including taper frame 1 and with taper frame 1, the hydraulic cylinder 2 that flange 9 is connected, and hydraulic cylinder 2 is externally provided with casing 8, and the top of hydraulic cylinder 2 is provided with suspension ring 10.Being provided with power cone 3(in taper frame 1 can be according to construction site, and power cone is two superpositions the most in the same direction), and power cone 3 is threaded connection or integrally welded with the piston rod of hydraulic cylinder 2；Taper frame 1 periphery is movably set with matched soil compaction blade 4, and the junction outside soil compaction blade 4 is provided with grave mound blade 5(and sees Fig. 3)；It is bolted on soil compaction blade 4 and is provided with slide block 11, and slide block 11 contacts with power cone 3 through the gathering sill being arranged in taper frame, and slide in the dovetail groove being arranged on power cone 3；The vertex of a cone of power cone 3 is connected by connecting rod 6 soil compaction cone 7, and the vertex of a cone of connecting rod 6 and power cone 3 and soil compaction are bored 7 and be threaded connection or integrally welded.
2, the processing method of vibration-free compaction without casting of soft foundation
(1) determination of layer thickness and stake holes arrangement etc. is processed
Intend, in process range, finding out the geological condition of foundation soil according to the specific requirement of " Code for investigation of geotechnical engineering " at loess, the soft foundation such as banket, find out the thickness of the layer and determine the thickness that foundation soil processes without casting vibration-free compaction；And take undisturbed, the relevant laboratory soil test of the basic parameters such as the moisture content of each soil layer, density, specific gravity of soil partical, void ratio, coefficient of collapsibility is carried out by the specific requirement of " earthwork test rule ".According to related specifications and the standard such as " Code for building construction in collapsible loess zone ", " building foundation treatment technical specification ", " railway engineering foundation treatment technology code ", determine stake holes arrangement when processing without casting vibration-free compaction, stake holes diameter, stake holes spacing and process the degree of depth.As a example by loess foundation compaction test site, somewhere, Lanzhou, determining that it processes layer thickness is 10 ± 0.3m, and stake holes arrangement is equilateral triangle, and stake holes spacing is 0.8 ± 0.005m, and stake holes aperture is 0.41 ± 0.005m, and the stake holes degree of depth is 10 ± 0.3m.
(2) without casting vibration-free compaction pore-forming
Before Loess Site plan Ground Treatment is carried out compaction, first with small-sized drill equipment such as auger, geology brill or manual Luoyang Spades, at center, position, each hole pre-formed a diameter of 0.15～0.20m, the degree of depth is the pilot hole of 1.1～1.5m, and pilot hole perpendicularity deviation is less than l%.After pilot hole completes, by self-advancing type without casting vibration-free compaction device Zheng Duikongwei center, under the effect of hydraulic system, power is reached power by its piston rod and bores 3 by hydraulic cylinder 2, power is reached soil compaction cone 7 and soil compaction blade 4, grave mound blade 5 by connecting rod 6 and slide block 11 again by power cone 3 respectively, and controls the horizontal reducing of the vertical flexible of soil compaction cone 7 and soil compaction blade 4 and grave mound blade 5.During the soil compaction blade 4 horizontal expansion reducing with grave mound blade 5, the soil body around is compacted, aperture expands the most continuously, is maximum gauge (0.41m) to top and carries out hole wall and vertically revise, to ensure the verticality (perpendicularity deviation making compacted hole is not more than 1.5%) of hole wall；In soil compaction cone 7 downward stretching process, the soil body around soil compaction cone 7 is squeezed forms hole.7 upwards shrinking at soil compaction cone, simultaneously during soil compaction blade 4 and grave mound blade 5 cross-direction shrinkage reducing, self-advancing type moves down without casting vibration-free compaction device entirety under Gravitative Loads.Circulate and so forth, disposably reach to design aperture and design hole depth in the case of vibrationless without casting.
(3) form compound foundation
After the pore-forming of vibration-free compaction without casting, placement in layers or irrigate semi-steel one-tenth pile material in compacted hole, and extrude or vibration compacting.After becoming pile material to form intensity, carry out the compacted pore-forming operation of other adjacent stake holes according to the mode of operation of step (2), ultimately form composite foundation.Additionally, the construction of bearing capacity pile foundation also can be carried out in compacted hole, form high-bearing capacity pile foundation.
Claims (8)
1. the compaction processing method of friction without casting of soft foundation, comprises the following steps that:
(1) stake holes arrangement and the determination of design parameter: in soft foundation intends process range, determining compaction layer thickness 10 ± 0.3m, stake holes arrangement is equilateral triangle, and stake holes aperture is 0.41 ± 0.005m, stake holes spacing is 0.8 ± 0.005m, and the stake holes degree of depth is 10 ± 0.3m；
(2) without casting vibration-free compaction pore-forming
Intending Loess Site before Ground Treatment carries out compaction, first with small-sized drill equipment at center, position, each hole pre-formed a diameter of 0.15～0.20m, the degree of depth is the pilot hole of 1.1～1.5m, and pilot hole perpendicularity deviation is less than l%；After pilot hole completes, by self-advancing type without casting friction compaction device Zheng Duikongwei center, use self-advancing type without casting friction compaction device, pilot hole carry out the horizontal reducing of continuous print and vertically get into again, make surrounding soil by the most compacted and form design aperture and the compacted pore-forming of hole depth；
Described self-advancing type includes taper frame (1) and the hydraulic cylinder (2) being connected with taper frame (1) by flange (9) without casting friction compaction device, and the top of hydraulic cylinder (2) is provided with suspension ring (10)；It is provided with power cone (3) in described taper frame (1), and power cone (3) tail end is connected with the piston rod of hydraulic cylinder (2)；Taper frame (1) periphery is movably set with matched soil compaction blade (4), and is movably set with grave mound blade (5) in the junction in soil compaction blade (4) outside；It is provided with slide block (11) on described soil compaction blade (4), and slide block (11) contacts connection through the gathering sill being arranged in taper frame (1) with power cone (3)；The vertex of a cone of described power cone (3) is connected by connecting rod (6) has soil compaction to bore (7)；
(3) form compound foundation: after compacted pore-forming, placement in layers or irrigate into pile material in hole, and extrude or vibration compacting, make pile body and be collectively forming composite foundation by compacted inter-pile soil.
2. the compaction processing method of friction without casting of soft foundation as claimed in claim 1, it is characterised in that: the degree of depth of described pilot hole is not less than the self-advancing type effective depth without casting friction compaction device.
3. the compaction processing method of friction without casting of soft foundation as claimed in claim 1 or 2, it is characterised in that: the diameter that the diameter of described pilot hole is bored without casting friction compaction device soil compaction not less than self-advancing type respectively.
4. the compaction processing method of friction without casting of soft foundation as claimed in claim 1 or 2, it is characterised in that: the perpendicularity deviation of described stake holes is not more than 1.5%.
5. the compaction processing method of friction without casting of soft foundation as claimed in claim 1 or 2, it is characterised in that: in form compound foundation, compacted pore-forming carries out the construction of bearing capacity pile foundation, form high-bearing capacity pile foundation.
6. the compaction processing method of friction without casting of soft foundation as claimed in claim 1, it is characterised in that: being provided with dovetail groove on described power cone (3), described slide block (11) slides in this dovetail groove.
7. the compaction processing method of friction without casting of soft foundation as claimed in claim 1, it is characterised in that: described power cone (3) at least two, and superposition the most in the same direction.
8. the compaction processing method of friction without casting of soft foundation as claimed in claim 1, it is characterised in that: described hydraulic cylinder (2) is externally provided with casing (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210493278.8A CN103015394B (en) | 2012-11-28 | 2012-11-28 | A kind of friction without casting compaction processing method of soft foundation |
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| CN201210493278.8A CN103015394B (en) | 2012-11-28 | 2012-11-28 | A kind of friction without casting compaction processing method of soft foundation |
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| CN103015394A CN103015394A (en) | 2013-04-03 |
| CN103015394B true CN103015394B (en) | 2016-08-31 |
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| CN112796298A (en) * | 2021-01-05 | 2021-05-14 | 陕西隆岳地基基础工程有限公司 | Intelligent expanding device for pile extruding and expanding foundation treatment and treatment process thereof |
| CN112942298B (en) * | 2021-02-02 | 2022-07-29 | 阳江市源丰建设工程有限公司 | Consolidation method of silt soft foundation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884710A (en) * | 2006-07-11 | 2006-12-27 | 南京工业大学 | Granule material hydrostatic pressure stake method for pressing force to groundsill |
| CN102162246A (en) * | 2011-05-18 | 2011-08-24 | 中铁西北科学研究院有限公司 | Vibration-less compaction method of collapsible loess foundation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU550190B2 (en) * | 1981-09-22 | 1986-03-06 | Dnepropetrovsky Inzhenerno-Stroitelny Institut | Forming holes in non rock soils |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884710A (en) * | 2006-07-11 | 2006-12-27 | 南京工业大学 | Granule material hydrostatic pressure stake method for pressing force to groundsill |
| CN102162246A (en) * | 2011-05-18 | 2011-08-24 | 中铁西北科学研究院有限公司 | Vibration-less compaction method of collapsible loess foundation |
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Effective date of registration: 20170510 Address after: 730000 Lanzhou Province, Chengguan District, Gansu Road, No. 365 Co-patentee after: Gansu China Railway Construction Engineering Co., Ltd. Patentee after: Northwest Research Institute Co., Ltd. of C.R.E.C. Address before: 730000 Lanzhou Province, Chengguan District, Gansu Road, No. 365 Patentee before: Northwest Research Institute Co., Ltd. of C.R.E.C. |
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