CN203755332U - Device for treating collapsible loess with lime-soil compaction piles and CFG rigid piles combined - Google Patents
Device for treating collapsible loess with lime-soil compaction piles and CFG rigid piles combined Download PDFInfo
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- CN203755332U CN203755332U CN201420111961.5U CN201420111961U CN203755332U CN 203755332 U CN203755332 U CN 203755332U CN 201420111961 U CN201420111961 U CN 201420111961U CN 203755332 U CN203755332 U CN 203755332U
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- 238000005056 compaction Methods 0.000 title claims abstract description 81
- 239000002689 soil Substances 0.000 title claims abstract description 61
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 18
- 238000005553 drilling Methods 0.000 abstract description 12
- 238000004080 punching Methods 0.000 abstract description 7
- 238000012856 packing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000010412 perfusion Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a device for treating collapsible loess with lime-soil compaction piles and CFG rigid piles combined. The device comprises the lime-soil compaction piles arranged in a collapsible loess area to be treated, the CFG rigid piles are arranged in pile bodies of the lime-soil compaction piles, and the pile diameter of the lime-soil compaction piles is larger than that of the CFG rigid piles. Firstly, the foundation of the collapsible loess area to be treated is pre-treated, then the positions of the lime-soil compaction piles are arranged according to design positions, holes are formed to design depth through an immersed pipe pile machine, the holes are filled with lime-soil packing, and a column hammer is used for carrying out layered punching and ramming to form the lime-soil compaction piles; then, holes are drilled in the pile bodies of the lime-soil compaction piles to the design depth of the CFG rigid piles through a long spiral drilling machine , and concrete is poured into the holes to form the CFG rigid piles. According to the device, the treating quality of the collapsible loess foundation can be obviously improved, engineering safety can be guaranteed, engineering investment can be greatly lowered, the design is reasonable, the structure is simple, safety and reliability are achieved, and high practicality is achieved.
Description
Technical field
The utility model relates to a kind of consolidation process technology of ground, relates in particular to the device of a kind of lime-soil compaction pile and CFG rigid pile Combined Treatment collapsible loess.
Background technology
Loess extensively exists in China, particularly the Northwest as a kind of common geology.Collapsibility of loess refers under loess certain pressure (comprising native gravity pressure and external pressure) effect, after being subject to water-soaked, structure is destroyed and the remarkable sinkage of generation rapidly, the loess with settlement by soaking is called collapsible loess, and collapsible loess can be divided into self weight collapse loess and non-gravity wet collapse loess.While building on collapsible loess foundation, must consider because saturated yielding causes the harm that additional settlement may cause engineering, so before carrying out engineering construction, should select suitable method for processing foundation, the harm that the saturated yielding of elimination ground causes.
In prior art, the darker general employing of collapsible loess foundation processing strong rammer, broken stone pile is compacted, rammer (punching) expands traditional method for processing foundation such as stake, these methods are Compaction variables, raising loess bearing capacity significantly, for large area ground, process and have stronger compliance, but for the high-bearing capacity of regional area, the reinforcing of low sedimentation requires compliance not strong, how in local small size region, can eliminating collapsibility of loess, ground high-bearing capacity and that economy is strong can be provided is again in some designs, to need the problem that solves.
Utility model content
The purpose of this utility model is to provide a kind of device that can significantly improve collapsible loess foundation Disposal quality, guarantee engineering safety, the lime-soil compaction pile that significantly reduces construction investment and CFG rigid pile Combined Treatment collapsible loess.
The technical solution of the utility model is achieved through the following technical solutions:
The device of lime-soil compaction pile of the present utility model and CFG rigid pile Combined Treatment collapsible loess, comprise a plurality of lime-soil compaction piles of being located in pending collapsible loess region, the pile body Inner of described lime-soil compaction pile is provided with CFG rigid pile, and the stake footpath of described lime-soil compaction pile is greater than the stake footpath of described CFG rigid pile.
The technical scheme being provided by above-mentioned the utility model can be found out, the device of lime-soil compaction pile of the present utility model and CFG rigid pile Combined Treatment collapsible loess, utilize dirt and collapsible loess to mix and produce serial physical chemical reaction, the particle that changes loess forms, reduce the index of plasticity of loess, make compaction pile have higher-strength to reduce the settlement by soaking of periphery loess simultaneously, make compaction pile and periphery loess become the soil body of comparatively stable, a basic Compaction variables, for the CFG rigid pile of rear implantation provides good stake week, stake base ring border; CFG rigid pile is placed in the compaction pile pile body that become, the stake week stake end, is all without collapsible loess environment, good stability, CFG is used as minor diameter rigid pile, can make full use of CFG rigid pile pile body rigidity and bearing capacity, periphery compaction pile can be used as Safety Redundancy providing without a collapsible loess stake week stake end ground environment simultaneously, can to requirement for bearing capacity, arrange CFG rigid pile position and quantity by design, and do not limit compaction pile large area ground, processes.
From application example, the utility model is simple in structure, reasonable in design, both given full play to the advantage of traditional Treatment method of collapsible loess foundation, take full advantage of again CFG rigid pile as the characteristic of rigid pile high-bearing capacity, structure is light and handy, and integrated engineering amount is little, construction period is short and wide accommodation.The utility model is reasonable in design, simple in structure, safe and reliable, strong adaptability.
Accompanying drawing explanation
Fig. 1 is the process chart of specific embodiment of the utility model;
Fig. 2 is the layout schematic diagram of lime-soil compaction pile in specific embodiment of the utility model;
Fig. 3 is lime-soil compaction pile and CFG rigid pile relative position floor map in specific embodiment of the utility model;
Fig. 4 is compaction pile and CFG rigid pile relative position elevational schematic view in specific embodiment of the utility model;
Fig. 5 is the A-A cross-sectional view of Fig. 4;
Fig. 6 is that in specific embodiment of the utility model, CFG rigid pile pile body upper reinforcement cage is arranged schematic diagram.
In figure:
1-lime-soil compaction pile; 2-CFG rigid pile; 3-collapsible loess; 4-reinforcing cage.
The specific embodiment
To be described in further detail the utility model embodiment below.
The device of lime-soil compaction pile of the present utility model and CFG rigid pile Combined Treatment collapsible loess, its preferably the specific embodiment be:
Comprise a plurality of lime-soil compaction piles of being located in pending collapsible loess region, the pile body Inner of described lime-soil compaction pile is provided with CFG rigid pile, and the stake footpath of described lime-soil compaction pile is greater than the stake footpath of described CFG rigid pile.
Described lime-soil compaction pile is made by dirt filler, and described CFG rigid pile is made by concrete.
The top pile body of described CFG rigid pile is provided with steel mesh reinforcement.
The pile spacing of described lime-soil compaction pile is more than or equal to the stake footpath of the CFG rigid pile of 3 times.
The bottom that is described collapsible loess, the stake end of described lime-soil compaction pile, the stake end of described CFG rigid pile, is concordant with the stake end of described compaction pile or higher than an end of described lime-soil compaction pile, the degree of depth of described collapsible loess is less than or equal to 20 meters.
The stake top of described CFG rigid pile is connected as a whole with the works placed on it of construction in later period by concreting.
The utility model is realized the method for lime-soil compaction pile and CFG rigid pile Combined Treatment collapsible loess, comprises step:
A, pending collapsible loess region ground is carried out to pretreatment;
B, press design attitude and arrange lime-soil compaction pile stake position, adopt pipeline sinking pile machine pore-forming to projected depth, in hole, fill out dirt filler, with post hammer layering punching, ram into lime-soil compaction pile;
C, in the pile body of described lime-soil compaction pile, by long-spiral drilling machine, hole to the projected depth of CFG rigid pile, in hole, concrete perfusion becomes CFG rigid pile.
Described steps A comprises: cleaning leveling, impact-rolling;
Described step B comprises: arrange that lime-soil compaction pile stake position, pipeline sinking pile facility are in place, boring, boring detect, filler is made, filler, post hammer layering punching are rammed in hole, construction equipment shifts out, the detection of lime-soil compaction pile pile;
Described step C comprises: long-spiral drilling machine is in place, concrete perfusion, fill orifice base concrete in boring, concrete for making, drilling rod, become and send pump limit to carry that drilling rod limit castinplace pile, pile, long-spiral drilling machine shift out, CFG rigid pile pile detects.
Collapsible loess foundation bearing capacity after described impact-rolling is processed is 100～120kpa.
In described dirt filler, contain the cement that is no more than 8%, described compaction pile bearing capacity is less than or equal to 300kpa.
Specific embodiment:
As shown in Fig. 1～Fig. 6:
Comprise the steps: step 1, to pending collapsible loess 1 region ground cleaning leveling and impact-rolling; Step 2, arranges 2 positions of lime-soil compaction pile by design attitude, adopts pipeline sinking pile machine pore-forming to projected depth, filler in hole, and compaction pile is rammed in post hammer layering punching; Step 3, arranges long-spiral drilling machine on compaction pile 2, in the internal drilling of compaction pile pile body, to CFG rigid pile 3 projected depths, pours into compound and become CFG rigid pile 3 after pore-forming.
Step 1 comprises the sub-steps such as cleaning leveling, impact-rolling pretreatment; Step 2 comprise arrange that compaction pile stake position, compaction pile facility are in place, boring, boring detect, filler is made and hole in filler, post hammer layering punching rammer, construction equipment shift out, the sub-step such as compaction pile pile detection; Step 3 comprises that long-spiral drilling machine is in place, concrete perfusion, fill orifice base concrete in boring, concrete for making, drilling rod, become and send pump limit to put forward the sub-steps such as drilling rod limit castinplace pile, pile, long-spiral drilling machine shift out, the detection of CFG rigid pile pile.
Lime-soil compaction pile pile spacing is controlled by CFG rigid pile design pitch, by CFG design stake footpath (0.4m) 1.2m that is greater than 3 times, considers design; Lime-soil compaction pile designs pile stake footpath 0.65m, is greater than the CFG rigid pile footpath 0.4m of pile; At the bottom of lime-soil compaction pile stake, be collapsible loess bottom, the degree of depth is 15m.
Compaction pile filler match ratio and the data based test of post hammer punching rammer are definite, and in filler, P.042.5 cement adopt, and content is 6% left and right, and after pile, compaction pile bearing capacity is 250kpa.
The CFG rigid pile that later stage forms is planted in the compaction pile pile body forming in advance.CFG rigid pile is as rigidity Small Diameter Pile design use, and CFG rigid pile stake top is connected as a whole with its basis that is placed in of construction in later period by concreting.CFG rigid pile compound is C20 concrete, and CFG rigid pile top pile body is installed reinforcing cage.According to requirement for bearing capacity, the long 12m of design CFG rigid pile stake.
Apply lime-soil compaction pile of the present utility model and CFG rigid pile Combined Treatment collapsible loess method, can significantly improve collapsible loess foundation Disposal quality, guarantee engineering safety, significantly reduce construction investment, thereby the economy of developing skill, its design principle is:
First utilize Lime-Soil Compaction Piles inter-pile soil, utilize lime and collapsible loess to mix and produce serial physical chemical reaction, the particle that changes loess forms, reduce the index of plasticity of loess, make compaction pile have higher-strength to reduce the settlement by soaking of periphery loess simultaneously, make compaction pile and periphery loess become the soil body of comparatively stable, a basic Compaction variables, for the CFG rigid pile of rear implantation provides good stake week, stake base ring border.CFG rigid pile is placed in the compaction pile pile body that become, the stake week stake end, is all without collapsible loess environment, good stability, CFG is used as minor diameter rigid pile, can make full use of CFG rigid pile pile body rigidity and bearing capacity, periphery compaction pile can be used as Safety Redundancy providing without a collapsible loess stake week stake end ground environment simultaneously, can to requirement for bearing capacity, arrange CFG rigid pile position and quantity by design, and do not limit compaction pile large area ground, processes.
In instantiation, under making sheet pedestal, ground is collapsible loess, bearing capacity 85kPa, and first excavation is to absolute altitude position at the bottom of making sheet pedestal, then former foundation soil is cleared up to leveling and impact-rolling, guarantee that the collapsible loess foundation bearing capacity after processing is not less than 100kpa.Then adopt diameter 650mm lime-soil compaction pile to process collapsible loess, pile spacing is 1.2m, stake is long to be determined according to actual collapsible loess thickness, and be not less than 15m, stake end need be through yellow soil horizon of collapsibility, ground is processed rear bearing capacity and is not less than 300kpa, and 2 row lime-soil compaction piles are arranged in counter force wall outside.Then in the lime-soil compaction pile in basic scope, 400mmCFG rigid pile is set, pile crown stretches into making sheet pedestal basis and is not less than 50mm, CFG rigid pile length is not less than 12m, in pile crown position, insert 10 Φ 16 reinforcing bars, insertion depth is not less than 7m, and under the satisfied two kinds of operating modes of ground processing, making sheet pedestal is to the bearing capacity of ground and settlement request.Making sheet pedestal grade slab is plain concrete construction, and thickness is 300mm, and planar dimension is 75m * 7.2m.Twice counter force wall is arranged in grade slab both sides, and counter force wall is reinforced concrete structure, only arranges a row CFG rigid pile foundation under counter force wall.
The above; it is only the preferably specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (6)
1. the device of a lime-soil compaction pile and CFG rigid pile Combined Treatment collapsible loess, it is characterized in that, comprise a plurality of lime-soil compaction piles of being located in pending collapsible loess region, the pile body Inner of described lime-soil compaction pile is provided with CFG rigid pile, and the stake footpath of described lime-soil compaction pile is greater than the stake footpath of described CFG rigid pile.
2. the device of lime-soil compaction pile according to claim 1 and CFG rigid pile Combined Treatment collapsible loess, is characterized in that, described lime-soil compaction pile is made by dirt filler, and described CFG rigid pile is made by concrete.
3. the device of lime-soil compaction pile according to claim 2 and CFG rigid pile Combined Treatment collapsible loess, is characterized in that, the top pile body of described CFG rigid pile is provided with steel mesh reinforcement.
4. the device of lime-soil compaction pile according to claim 3 and CFG rigid pile Combined Treatment collapsible loess, is characterized in that, the pile spacing of described lime-soil compaction pile is more than or equal to the stake footpath of the CFG rigid pile of 3 times.
5. the device of lime-soil compaction pile according to claim 4 and CFG rigid pile Combined Treatment collapsible loess, it is characterized in that, the bottom that the stake end of described lime-soil compaction pile is described collapsible loess, the stake end of the stake end and the described compaction pile of described CFG rigid pile, is concordant or higher than an end of described lime-soil compaction pile, the degree of depth of described collapsible loess is less than or equal to 20 meters.
6. the device of lime-soil compaction pile according to claim 5 and CFG rigid pile Combined Treatment collapsible loess, is characterized in that, the stake top of described CFG rigid pile is connected as a whole with the works placed on it of construction in later period by concreting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111961.5U CN203755332U (en) | 2014-03-12 | 2014-03-12 | Device for treating collapsible loess with lime-soil compaction piles and CFG rigid piles combined |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111961.5U CN203755332U (en) | 2014-03-12 | 2014-03-12 | Device for treating collapsible loess with lime-soil compaction piles and CFG rigid piles combined |
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| Publication Number | Publication Date |
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| CN203755332U true CN203755332U (en) | 2014-08-06 |
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| CN201420111961.5U Expired - Lifetime CN203755332U (en) | 2014-03-12 | 2014-03-12 | Device for treating collapsible loess with lime-soil compaction piles and CFG rigid piles combined |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790173A (en) * | 2014-03-12 | 2014-05-14 | 中铁第五勘察设计院集团有限公司 | Lime-soil compaction pile and CFG rigid pile combined device and method for disposing collapsible loess |
| CN109610443A (en) * | 2018-12-29 | 2019-04-12 | 周同和 | A kind of construction method for collapsibility soil body stake |
-
2014
- 2014-03-12 CN CN201420111961.5U patent/CN203755332U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790173A (en) * | 2014-03-12 | 2014-05-14 | 中铁第五勘察设计院集团有限公司 | Lime-soil compaction pile and CFG rigid pile combined device and method for disposing collapsible loess |
| CN103790173B (en) * | 2014-03-12 | 2015-12-09 | 中铁第五勘察设计院集团有限公司 | The device and method of lime-soil compaction pile and CFG rigid pile Combined Treatment collapsible loess |
| CN109610443A (en) * | 2018-12-29 | 2019-04-12 | 周同和 | A kind of construction method for collapsibility soil body stake |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20140806 |
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| CX01 | Expiry of patent term |