CN103015394A - No-dumping vibrationless pore-forming compaction processing method for mollisol foundations - Google Patents
No-dumping vibrationless pore-forming compaction processing method for mollisol foundations Download PDFInfo
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- CN103015394A CN103015394A CN2012104932788A CN201210493278A CN103015394A CN 103015394 A CN103015394 A CN 103015394A CN 2012104932788 A CN2012104932788 A CN 2012104932788A CN 201210493278 A CN201210493278 A CN 201210493278A CN 103015394 A CN103015394 A CN 103015394A
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Abstract
The invention provides a self-propelled no-dumping vibrationless pore-forming compaction processing method for mollisol foundations, which comprises the following steps: determining arrangement method, diameters and intervals of pile pores and processing depth for compaction processing in the processing range of the mollisol foundations; performing pretreatment on the dead centers of all pile pore locations to form guide pores; and then adopting the self-propelled no-dumping vibrationless pore-forming compaction device to perform continuous transverse diameter reducing and vertical squeezing on the guide pores to enable the surrounding soil bodies to be continuously compacted to form compaction pores with designed pore diameter and pore depth. According to the invention, the method for processing the mollisol foundations is simple, vibration is avoided, the efficiency is high, and the quality is good; and the adopted self-propelled no-dumping vibrationless pore-forming compaction device is simple in structure, small in size, light and flexible, and is particularly suitable for pore-forming compaction processing for mollisol foundations such as loess, filling and the like in a construction field which has small space, is narrow and strictly controls the vibration.
Description
Technical field
The invention belongs to the ground stabilization processing technology field, the ground extruding processing method that relates to a kind of soft foundation, relate in particular to construction plant such as the loess of a kind of little space, narrow and small area, strict control vibration, the soft foundation such as banket without casting vibration-free compaction processing method.
Background technology
Loess, compressibilty is high, intensity is low, the shortcomings such as Collapsing Deformation easily occur in immersion because it has for the mollisol such as banket, so must process soft foundation before construction.Fast development along with Chinese society economy, the construction grades such as railway, highway, house constantly promote, requirement to the control technique of settlement after construction is stricter, especially in little space, the soft foundation construction plant of narrow and small, strict control vibration, existing processing method is subject to certain restrictions, and can't satisfy the high standard requirement.
Soft foundation construction plant, little space, such as loess tunnel, construction permissible height and width requirement are respectively less than 6.7m, 7.8m, during the ground stabilization of the existing worker in mollisol district China Democratic National Construction Association, ancient building is processed, the construction permissible height is less than 3m, and this just requires corresponding construction equipment to realize miniaturization.When narrow and small soft foundation construction plant, as be positioned at the architectural complex of down town, the consolidation process of the soft foundation such as carry out loess, banket, the construction plant is subjected to the impact of Adjacent Buildings or structure and is very narrow and small.When so the compaction of foundation soil was carried out in narrow and small place, construction equipment needed small and exquisite flexible, easy operating, and construction is disturbed little.The soft foundation construction plant of strict control vibration, as the railway tunnel, the highway tunnel that pass through loess formation excavate because of the hole body in the construction, make the original stress of the soil body be subject to disturbance, the vibration in the construction easily causes tunnel damage of soil body, mountain body cracking, landslide; In the urban construction, the main harm of vibration shows as the impact on building safety, and in the indoor environment on the impact of human comfort.Therefore, in the construction plant that vibration is had strict control requirement, the existing processing method that adopts the compacted jump bit of impact, vibro driver, diesel hammer pile driver etc. to have larger vibration is subject to certain restrictions or is no longer applicable.
Summary of the invention
The objective of the invention is for problems of the prior art and defective, provide a kind of soft foundation without casting vibration-free compaction processing method.
Soft foundation of the present invention without casting vibration-free compaction processing method, comprise following processing step:
(1) determining of stake hole arrangement and design parameters: in soft foundation is intended process range, determine compaction layer thickness, stake hole arrangement, stake bore dia, stake pitch of holes and stake hole depth according to the related specifications standard such as " Code for building construction in collapsible loess zone ", " building lot treatment technology standard ", " railway engineering foundation treatment technology rules " and actual conditions.
(2) casting vibration-free compaction pore-forming
Carry out preliminary treatment at each place, center, position, hole first and form pilot hole; Adopt again self-advancing type without casting vibration-free compaction device pilot hole to be carried out continuous horizontal reducing and vertically get into, make surrounding soil by compacted and form the compacted pore-forming of design aperture and hole depth continuously.
The degree of depth of described pilot hole, diameter are not less than respectively self-advancing type without the length of casting friction compaction device, the diameter of soil compaction cone.
The perpendicularity deviation of described pilot hole is not more than l%; Described self-advancing type is not less than the degree of depth of pilot hole without the effective height of casting vibration-free compaction device.
The perpendicularity deviation in described stake hole is not more than 1.5%.
(3) form compound foundation: behind the compacted pore-forming, placement in layers or pour into into pile material in the hole, and extruding or vibration compacting, make pile body with by the common form compound foundation of compacted inter-pile soil.
In order further to improve the supporting capacity of ground, in compacted hole, carry out the construction of bearing capacity pile foundation, form the high-bearing capacity pile foundation.
Described self-advancing type comprises taper frame and the hydraulic cylinder that is connected by flange with the taper frame without casting vibration-free compaction device, and is provided with suspension ring at the top of hydraulic cylinder; Be provided with the power cone in the described taper frame, and power cone tail end is connected with the piston rod of hydraulic cylinder; Taper frame periphery is movably set with the soil compaction blade suitable with it, and is movably set with the grave mound blade in the junction in the soil compaction blade outside; Be provided with slide block on the described soil compaction blade, and slide block passes the gathering sill that is arranged on the taper frame and touches with the power tapered joint and be connected; The vertex of a cone of described power cone is connected with the soil compaction cone by connecting rod.
Be provided with dovetail groove on the described power cone, described slide block slides in this dovetail groove.
Described hydraulic cylinder is provided with casing outward.
Described power cone is at least two, and successively in the same way stack.
The present invention has the following advantages with respect to prior art:
1, the present invention adopts self-advancing type to carry out continuous horizontal reducing without casting vibration-free compaction device and vertically gets into, mode by static pressure realizes the soil compaction pore-forming, make the original loess in the ground process range, the compactness of mollisol such as banket strengthens, bearing capacity improves, settlement by soaking is eliminated, and by in compacted hole, filling or pour into half rigidity pile material pile, form compound foundation, thereby raising loess, the bearing capacity of soft foundation and the post-construction deformation of control ground such as banket, satisfied loess tunnel, existing worker China Democratic National Construction Association, the construction space requirement in the little space such as ancient building also can be satisfied the construction requirement at the narrow and small places such as architectural complex of down town.
Not casting when 2, the present invention constructs, friction, noiselessness can satisfy the loess of the construction plant of little space, narrow and small area, strict control vibration, the compaction of the soft foundation such as banket.
3, the present invention stretches downwards by horizontal hole enlargement and the soil compaction cone of soil compaction blade, has realized disposable design aperture and the design hole depth of reaching in the work progress, and efficiency of construction is high, and quality is good.
Description of drawings
Fig. 1 is that the present invention is without the schematic diagram of casting vibration-free compaction processing method;
Fig. 2 is that self-advancing type of the present invention is without the vertical cross section figure of casting vibration-free compaction device;
Fig. 3 is that self-advancing type of the present invention is without the view in transverse section of 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.
The specific embodiment
Below by specific embodiment to self-advancing type of the present invention without the structure of casting vibration-free compaction device and being elaborated without casting vibration-free compaction processing method of soft foundation.
1, self-advancing type is without casting vibration-free compaction device
Self-advancing type involved in the present invention comprises taper frame 1 and the hydraulic cylinder 2 that is connected by flange 9 with taper frame 1 without casting vibration-free compaction device, is provided with casing 8 outside the hydraulic cylinder 2, 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 the construction plant, and the power cone is two successively in the same way stacks), and the piston rod of power cone 3 and hydraulic cylinder 2 is threaded connection or integrally welded; Taper frame 1 periphery is movably set with the soil compaction blade 4 suitable with it, and is provided with grave mound blade 5(in the junction in soil compaction blade 4 outsides and sees Fig. 3); Be bolted on the soil compaction blade 4 and be provided with slide block 11, and slide block 11 passes the gathering sill that is arranged on the taper frame and contact with power cone 3, and bore in the dovetail groove on 3 and slide in being arranged on power; The vertex of a cone of power cone 3 is connected with soil compaction cone 7 by connecting rod 6, and the vertex of a cone of connecting rod 6 and power cone 3 and soil compaction cone 7 are threaded connection or integrally welded.
2, soft foundation without casting vibration-free compaction processing method
(1) processing layer thickness and stake hole arrangement etc. determines
Intend finding out the geological condition of foundation soil according to the specific requirement of " Code for investigation of geotechnical engineering " in the process range at loess, the soft foundation such as banket, find out the thickness that the thickness of the layer and definite foundation soil are processed without the casting vibration-free compaction; And get undisturbed, the relevant laboratory soil test of the basic parameters such as the moisture content of each soil layer, density, specific gravity of soil particle, void ratio, coefficient of collapsibility is carried out in the specific requirement of pressing " earthwork test rule ".According to related specifications and standards such as " Code for building construction in collapsible loess zone ", " building lot treatment technology standard ", " railway engineering foundation treatment technology rules ", determine stake hole arrangement, stake bore dia, stake pitch of holes and the processing degree of depth when processing without the casting vibration-free compaction.Take loess foundation compaction test site, somewhere, Lanzhou as example, determine that its processing layer thickness is 10 ± 0.3m, stake hole arrangement is equilateral triangle, and the stake pitch of holes is 0.8 ± 0.005m, and stake aperture, hole is 0.41 ± 0.005m, and the stake hole depth is 10 ± 0.3m.
(2) without casting vibration-free compaction pore-forming
Before Loess Site intended Ground Treatment and carry out compaction, utilize first the small-sized drill equipment such as auger, geology brill or manual luoyang spade, locating pre-formed diameter in each center, position, hole is 0.15～0.20m, and the degree of depth is the pilot hole of 1.1～1.5m, and the pilot hole perpendicularity deviation is less than l%.After pilot hole is finished, with self-advancing type without casting vibration-free compaction device over against center, position, hole, under the effect of hydraulic system, hydraulic cylinder 2 reaches power cone 3 by its piston rod with power, power cone 3 reaches soil compaction cone 7 and soil compaction blade 4, grave mound blade 5 by connecting rod 6 and slide block 11 respectively with power again, and the horizontal reducing of the vertical flexible and soil compaction blade 4 of control soil compaction cone 7 and grave mound blade 5.In the horizontal expansion reducing process of soil compaction blade 4 and grave mound blade 5, the soil body on every side is by compacted, the aperture enlarges from lower to upper continuously, is maximum gauge (0.41m) to top and carries out hole wall and vertically revise, to guarantee the up rightness (making the perpendicularity deviation in compacted hole be not more than 1.5%) of hole wall; In the soil compaction cone 7 downward stretching process, soil compaction cone 7 on every side squeezed the opening of the soil body and pore-forming.Upwards shrink at soil compaction cone 7, in soil compaction blade 4 and the grave mound blade 5 transverse contraction reducing processes, self-advancing type moves down without casting vibration-free compaction device integral body under Gravitative Loads simultaneously.And so forth the circulation, without the vibrationless situation of casting next time property reach the design aperture and the design hole depth.
(3) form compound foundation
Behind casting vibration-free compaction pore-forming, placement in layers or pour into half rigidity pile material in the compacted hole, and extruding or vibration compacting.After becoming pile material to form intensity, carry out the compacted pore-forming operation in other adjacent studs hole according to the mode of operation of step (2), final form compound foundation.In addition, also can in compacted hole, carry out the construction of bearing capacity pile foundation, form the high-bearing capacity pile foundation.
Claims (10)
- A soft foundation without casting friction compaction processing method, comprise following processing step:(1) determining of stake hole arrangement and design parameters: in soft foundation is intended process range, determine compaction layer thickness, stake hole arrangement, stake bore dia, stake pitch of holes and stake hole depth;(2) without casting vibration-free compaction pore-formingForm pilot hole in each center, position, hole preliminary treatment first; Adopt again self-advancing type without casting friction compaction device pilot hole to be carried out continuous horizontal reducing and vertically get into, make surrounding soil by compacted and form the compacted pore-forming of design aperture and hole depth continuously;(3) form compound foundation: behind the compacted pore-forming, placement in layers or pour into into pile material in the hole, and extruding or vibration compacting, make pile body with by the common form compound foundation of compacted inter-pile soil.
- As claimed in claim 1 soft foundation without casting vibration-free compaction processing method, it is characterized in that: the degree of depth of described pilot hole is not less than self-advancing type without the effective height of casting friction compaction device.
- As claimed in claim 1 or 2 soft foundation without casting vibration-free compaction processing method, it is characterized in that: the diameter of described pilot hole is not less than respectively self-advancing type without the diameter of casting friction compaction device soil compaction cone.
- As claimed in claim 1 or 2 soft foundation without casting vibration-free compaction processing method, it is characterized in that: the perpendicularity deviation in described stake hole is not more than 1.5%.
- As claimed in claim 1 soft foundation without casting vibration-free compaction processing method, it is characterized in that: the perpendicularity deviation of described pilot hole is not more than l%.
- As claimed in claim 1 or 2 soft foundation without casting vibration-free compaction processing method, it is characterized in that: in form compound foundation, in compacted pore-forming, carry out the construction of bearing capacity pile foundation, form the high-bearing capacity pile foundation.
- As claimed in claim 1 soft foundation without casting vibration-free compaction processing method, it is characterized in that: described self-advancing type comprises taper frame (1) and the hydraulic cylinder (2) that is connected by flange (9) with taper frame (1) without casting friction compaction device, and the top of hydraulic cylinder (2) is provided with suspension ring (10); Be provided with power cone (3) in the 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 the soil compaction blade (4) suitable with it, and is movably set with grave mound blade (5) in the junction in soil compaction blade (4) outside; Be provided with slide block (11) on the described soil compaction blade (4), and slide block (11) passes the gathering sill that is arranged on the taper frame (1) and is connected with power cone (3) contact; The vertex of a cone of described power cone (3) is connected with soil compaction cone (7) by connecting rod (6).
- As claimed in claim 7 soft foundation without casting vibration-free compaction processing method, it is characterized in that: be provided with dovetail groove on the described power cone (3), described slide block (11) slides in this dovetail groove.
- As claimed in claim 7 soft foundation without casting vibration-free compaction processing method, it is characterized in that: (3) are described is at least two for described power cone, and successively in the same way stack.
- As claimed in claim 7 soft foundation without casting vibration-free compaction processing method, it is characterized in that: the outer casing (8) that is provided with of described hydraulic cylinder (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN103015394A (en) | 2013-04-03 |
| CN103015394B CN103015394B (en) | 2016-08-31 |
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| CN201210493278.8A Expired - Fee Related CN103015394B (en) | 2012-11-28 | 2012-11-28 | A kind of friction without casting compaction processing method of soft foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112942298A (en) * | 2021-02-02 | 2021-06-11 | 阳江市源丰建设工程有限公司 | Consolidation method of silt soft foundation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4496011A (en) * | 1981-09-22 | 1985-01-29 | Dnepropetrovsky Inzhenerno-Stroitelny Institut | Tool for forming earth holes having fixed walls and method therefor |
| 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 |
-
2012
- 2012-11-28 CN CN201210493278.8A patent/CN103015394B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4496011A (en) * | 1981-09-22 | 1985-01-29 | Dnepropetrovsky Inzhenerno-Stroitelny Institut | Tool for forming earth holes having fixed walls and method therefor |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112942298A (en) * | 2021-02-02 | 2021-06-11 | 阳江市源丰建设工程有限公司 | Consolidation method of silt soft foundation |
| 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 |
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| CN103015394B (en) | 2016-08-31 |
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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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Granted publication date: 20160831 Termination date: 20201128 |