CN208039234U - A kind of engineering pile in solution cavity geology - Google Patents
A kind of engineering pile in solution cavity geology Download PDFInfo
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- CN208039234U CN208039234U CN201820467672.7U CN201820467672U CN208039234U CN 208039234 U CN208039234 U CN 208039234U CN 201820467672 U CN201820467672 U CN 201820467672U CN 208039234 U CN208039234 U CN 208039234U
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Abstract
A kind of engineering pile in solution cavity geology, the engineering pile lower part passes through geological stratification, the solution cavity is located in geological stratification, the engineering pile passes through solution cavity and extends in topsoil body, a circle rotary churning pile reinforcing body is gone along with sb. to guard him on the engineering pile outer wall in the solution cavity, symmetrical structure centered on the reinforcing body, the outer profile that rotary churning pile reinforces body section is made of several end to end minor arcs, the geological stratification is followed successively by lime rock stratum, broken rock and the upper layer soil body from bottom to top, and the solution cavity is located in broken rock.The utility model has the characteristics that safety, is applicable in, and has good promotion and practical value, and will produce good economic benefit after extensive popularization and application.
Description
Technical field
The utility model belongs to the realm of building construction more particularly to a kind of engineering pile in solution cavity geology.
Background technology
At present in Karst geology region engineering pile generally use mud off+rotary digging drilling hole bored concrete pile form, filled out when meeting
Solution cavity is worn to supporting course designed elevation to complete drilling using backfill slabstone or concrete when filling the solution cavity of object, is generally required repeatedly
Multiple backfill could be completed to drill, and need a large amount of slabstone or concrete, and stake holes cannot be closed in time, need more
Shelve for a long time, be easy to cause collapse hole, stake holes top collapse even it is larger range of collapse, in turn result in security risk and week
Side soil property is seriously destroyed, and cost waste and construction delay are brought to construction, since the filler in solution cavity is usually liquid-plastic state,
Even if after backfilling slabstone or concrete can smooth pore-forming, but there is stream modeling filler and flow to bottom hole, bottom hole sediment is blocked up, and
And the solution cavity position soil body is also possible to deformation and causes stake shortea, broken pile, influences pile quality.
Utility model content
The purpose of this utility model is to provide a kind of engineering pile in solution cavity geology, mainly solves engineering pile and passes through solution cavity
When the technical issues of being difficult to form effective retaining wall in solution cavity；And it solves the filler in solution cavity and is no longer flow into stake holes so that increasing
The problem of adding pile bottom sediment and solution cavity position soil deformation to cause stake shortea, broken pile, improves pile quality.
To achieve the above object, the utility model adopts the following technical solution：
A kind of engineering pile in solution cavity geology, it is characterised in that：The engineering pile lower part passes through geological stratification, the solution cavity
In geological stratification, the engineering pile passes through solution cavity and extends in topsoil body, the engineering pile outer wall being located in the solution cavity
On go along with sb. to guard him a circle rotary churning pile reinforcing body, symmetrical structure centered on the reinforcing body, if rotary churning pile reinforce the outer profile of body section by
Dry end to end minor arc composition.
It is further preferred that the geological stratification is followed successively by lime rock stratum, broken rock and the upper layer soil body from bottom to top, it is described
Solution cavity is located in broken rock.
The utility model has the characteristics that and advantageous effect compared with prior art：
The utility model needle provides pile condition in solution cavity to be installed with engineering pile made of the solution cavity of plastic filler,
By rotary churning pile reinforcing body harden solution cavity in filler, make filler no longer hold rheology, not undergauge, do not collapse substantially,
Ensure that engineering pile side wall when across solution cavity is stablized, it is ensured that pile quality.
The utility model has the characteristics that safety, is applicable in, and has good promotion and practical value, after extensive popularization and application
It will produce good economic benefit.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of engineering pile in solution cavity geology of the utility model；
Fig. 2 is the structural scheme of mechanism that the utility model is construction work stake；
Fig. 3 the utility model is related to engineering pile pre-set space and injecting cement paste position relationship schematic diagram；
Fig. 4 be the utility model is related to injecting cement paste remove structural schematic diagram in engineering pile pre-set space after injecting cement paste.
Reference numeral：1- solution cavities；2- engineering pile pre-set spaces；4- rotary churning pile reinforcing bodies；5- Grouting Pipes；6- engineering piles；7-
Lime rock stratum；8- broken rocks；The upper layers the 9- soil body；12- injecting cement pastes；13- churning sections；A- churning section height；B- rotary churning piles are reinforced
Body height.
Specific implementation mode
To make technological means, character of innovation, reached purpose and effect of the utility model be easy to understand, below
The utility model is further illustrated.
The embodiment recorded herein is the specific specific implementation mode of the utility model, for illustrating the utility model
Design, is explanatory and illustrative, should not be construed as the limit to the utility model embodiment and the scope of the utility model
System.In addition to the embodiment recorded herein, those skilled in the art can also be based on the application claims and specification institute is public
For the content opened using obvious other technical solutions, these technical solutions include doing using the embodiment to recording herein
Go out the technical solution of any obvious substitutions and modifications.
A kind of engineering pile in solution cavity geology, as shown in Figure 1,6 lower part of engineering pile passes through geological stratification, solution cavity 1 to be located at ground
In matter layer, engineering pile 6 passes through solution cavity 1 and extends in the upper layer soil body 9, and a circle is gone along with sb. to guard him on 6 outer wall of engineering pile in solution cavity 1
Rotary churning pile reinforcing body 4, symmetrical structure centered on reinforcing body, the outer profile in 4 section of rotary churning pile reinforcing body are joined end to end by several
Minor arc composition, geological stratification is followed successively by lime rock stratum 7, broken rock 8 and the upper layer soil body 9 from bottom to top, and solution cavity 1 is located at kata-rocks
In layer 8.
The pile-formation process of a kind of engineering pile in solution cavity geology, which is characterized in that include the following steps：
Step 1: preparing before construction：There is plastic filling in the solution cavity passed through using advance drilling confirmation engineering pile pre-set space 2
Object, the engineering pile pre-set space 2 are the cylindrical space that pre-filled concrete forms engineering pile；
Step 2: calculating the height of Grouting Pipe：Needed for the position of the solution cavity obtained according to advance drilling and elevation information calculate
The height of the height of Grouting Pipe 5 and rotary churning pile reinforcing body 4, the rotary churning pile reinforcing body 4 is solution cavity height；
Step 3: making cement grout：Use strength grade for P.O42.5 grades of Portland cements with meet《Coagulation
Native mixing water standard》Water as defined in JGJ63-2006 mixes and stirs, and the ratio of mud takes 0.8 ~ 1.5, and the utility model ratio of mud takes 1.0,
It is needed to be incorporated as early strength agent and/or set accelerating additive according to the duration；
Step 4: laying slip casting point, jumping drilling：As shown in Fig. 2, the uniform cloth on 2 outer diameter of engineering pile pre-set space
If a circle slip casting point chooses two slip casting points and drills from ground to solution cavity 1, in two slip casting points using drill hole of drilling machine
2 Grouting Pipes are laid in centre, are located at the high pressure jet grouting formation churning from bottom to top of Grouting Pipe 5 section 13 of solution cavity 1；
Grouting Pipe nozzle reaches 0.5 ~ 1m of solution cavity bottom in advance drilling data（The requires of the utility model reaches bottom once
1m）, start rotary jet grouting, grouting pressure is not less than 20MPa, and slip casting process works continuously, opens spray feed and enter to conform to from bottom to top
Water, gas, the slurry asked, after slurries return out aperture it is normal after, start to be promoted, churning promoted speed control in 25 ~ 28cm/min ranges
Interior, rotary speed controls within the scope of 20 ~ 28r/min（Also it can be calculated according to specific soil property situation）, it is promoted to above solution cavity
It can stop slip casting at 1m, and extract injection pipe rapidly.
Step 5: repeating step 4：Two slip casting points are drilled for one group, lay Grouting Pipe and slip casting successively, directly
The equal slip casting of upper slip casting point to 2 outer diameter of engineering pile pre-set space is completed, and each slip casting point slip casting is completed to form cylindrical note
Slurry unit pulls out as shown in figure 3, adjacent column shape slip casting body unit, which is crossed to form slip casting, forms injecting cement paste 12 after the completion of slip casting
Go out Grouting Pipe 5；
Cylindrical slip casting body unit is formed by single tube spinning-jet, a diameter of 400mm ~ 500mm, adjacent column shape slip casting body unit
The distance between center of circle is 250mm ~ 300mm, and length of action is 150mm ~ 200mm.
Step 6: mud off rotary digging drilling hole：After 12 slip casting of injecting cement paste is completed 48 hours, as shown in figure 4, pre- in engineering pile
If drilling forms engineering pile hole to be provided downwards in space 2, injecting cement paste 12 is located at the part in engineering pile pre-set space 2 and removes shape
At rotary churning pile reinforcing body 4；
As shown in Fig. 2, 13 height of churning section, i.e. it is that rotary churning pile is reinforced that churning section height a, which is more than rotary churning pile reinforcing body 4 highly,
Body height b at least 2m, wherein 13 bottom surface absolute altitude of churning section are less than 4 bottom surface absolute altitude at least 1m of rotary churning pile reinforcing body, correspondingly, churning
13 top surface absolute altitudes of section are safeguard and technological requirement higher than 4 top surface of rotary churning pile reinforcing body at least 1m, the 2m having more, and are not effective
Pile body is similar to as the superfilled requirement of engineering pile.
Step 7: concrete perfusion：Concrete perfusion forms engineering pile 6 in engineering pile hole to be provided, is carried out to engineering pile 6
Quality inspection waits for that quality inspection finishes, and after massless problem, a kind of Construction of Engineering Pile in solution cavity geology of the utility model is completed, step
Engineering quality of pile is verified by loading test and pile integrity detection in six, is met《Architecture foundation pile inspection specifications》
The related request of JGJ106-2014.
High pressure jet grouting points for attention：
（1）Levelling of the land is first carried out before construction, has dug plasma discharge ditch, carries out drilling machine positioning, it is desirable that drilling machine, which is placed, keeps horizontal,
Drilling rod keeps vertical, and gradient is not greater than 1.5%.
（2）Spray-hole is not preferably greater than 50m at a distance from high-pressure injection pump, and the position of drilling and the deviation of design position must not
More than 50mm, perpendicularity deviation is not more than 1%.
（3）Check that high pressure water sprays situation with air being inserted into churning Guan Qianxian, whether each position sealing ring is closed, and is inserted into
High-pressure water shot water test, the qualified sprayable slurries in rear are first done afterwards.Hydraulic spray is wrapped up with plastic cloth before being inserted into, in order to avoid soil
It blocks.
Engineering pile main construction method is perfused in mud off spiral-digging pore：
（1）Surveying setting-out（Fabrication of reinforcing cage is simultaneously checked and accepted, prepares mud）；
（2）Drilling machine is in place；
（3）Casing is buried using drilling machine；
（4）Holing with slurry wall protection examines hole depth to projected depth；
（5）Utilize borehole cleaning of drilling bucket；
（6）Hang steel reinforcement cage；
（7）It is inserted into conduit；
（8）Secondary pile hole cleaning；
（9）Pile concrete is perfused；
（10）Pull out conduit and casing；
（11）Pile measurement is carried out after 28 days.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (2)
1. a kind of engineering pile in solution cavity geology, it is characterised in that：The engineering pile（6）Lower part passes through geological stratification, described molten
Hole（1）In geological stratification, the engineering pile（6）Across solution cavity（1）And extend to the upper layer soil body（9）It is interior, it is located at the solution cavity
（1）Interior engineering pile（6）A circle rotary churning pile reinforcing body is gone along with sb. to guard him on outer wall（4）, symmetrical structure centered on the reinforcing body, rotary churning pile
Reinforcing body（4）The outer profile in section is made of several end to end minor arcs.
2. a kind of engineering pile in solution cavity geology as described in claim 1, it is characterised in that：The geological stratification is from bottom to top
It is followed successively by lime rock stratum（7）, broken rock（8）With the upper layer soil body（9）, the solution cavity（1）Positioned at broken rock（8）It is interior.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820467672.7U CN208039234U (en) | 2018-03-30 | 2018-03-30 | A kind of engineering pile in solution cavity geology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108265706A (en) * | 2018-03-30 | 2018-07-10 | 中国建筑第二工程局有限公司 | A kind of engineering pile and pile-formation process in solution cavity geology |
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2018
- 2018-03-30 CN CN201820467672.7U patent/CN208039234U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108265706A (en) * | 2018-03-30 | 2018-07-10 | 中国建筑第二工程局有限公司 | A kind of engineering pile and pile-formation process in solution cavity geology |
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