CN202450520U - High-pulling resistance stress-distributed sand adding anti-floating pile - Google Patents
High-pulling resistance stress-distributed sand adding anti-floating pile Download PDFInfo
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- CN202450520U CN202450520U CN 201120534909 CN201120534909U CN202450520U CN 202450520 U CN202450520 U CN 202450520U CN 201120534909 CN201120534909 CN 201120534909 CN 201120534909 U CN201120534909 U CN 201120534909U CN 202450520 U CN202450520 U CN 202450520U
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Abstract
The utility model provides a high-pulling resistance stress-distributed sand adding anti-floating pile. The pile comprises a pile body; a rib body is arranged in the pile body; the pile is characterized in that the pile body is formed by uniformly mixing cement mortar; the rib body is connected with a stress-distributed structure body; and a reinforcement body and the stress-distributed structure body form an anchoring member bonded with the pile body. According to the high-pulling resistance sand adding anti-floating pile provided by the utility model, grouting is performed by use of cement mortar based on the conventional anti-floating pile body, the strength of the pile body is improved, and the use of cement is saved; and after pile formation, the cement strength is improved by over 20% than that of the conventional pure-cement mortar rotary jet grouting pile.
Description
Technical field
The utility model relates to technical field of civil engineering, particularly deep foundation pit support and ground reinforce fast with anchoring engineering in use add the stake of sand anti-floating.
Background technology
The piled anchor structure of deep foundation ditch active support employing at present and building anti-floating and the uplift pile that resists inclination mainly contain soil bolt.This soil bolt generally adopts well cementing and rotary jet grouting to form cement paste anchoring body or cement-soil anchoring body and insert dowel; Because construction period is tight; In short curing time; Just need carry out stretch-draw to dowel wherein, the anchoring body that usually makes grouting body or rotary jet grouting form is damaged by tension and compression.We can say that in present 3～7 days curing time, the anchoring body compressive strength that is formed by grouting or rotary jet grouting is generally lower, can't obtain higher uplift resistance.In order in short curing time, to obtain anchoring effect preferably, be badly in need of solving under the high uplift resistance how to improve the adhesion problem between reinforcement body and the anchoring body.
For the feasible pile body of putting more energy into can provide higher uplift resistance in short curing time; Usually adopt accelerating admixture or early stage agent to improve the intensity of the cement soil body or cement slurry; Or adopt chemical gelling agent, but these all increase more construction cost, and the amplitude that improves is less.
General full bonding steel strand and the anchor ingot plate of adopting of current anchor pole commonly used is as anchoring piece; This anchor pole can meet design requirement in long curing time; But shorter when curing time, when the intensity of anchoring body is low, find that through the actual measurement of engineering the big phenomenon of displacement usually appears in this anchor pole; Particularly in mucky soil, it is more obvious to be out of shape big situation.
The load transfer mechanism of soil bolt is: the inner load transfer mechanism of the anchor pole that bonds is entirely mainly divided two parts: steel strand are stressed to pass to slurry through the contact surface with slurry; Slurry passes to ground through the contact surface with ground; These two transmittance process forms all are the shearing forms, so follow two kinds of mode of failure simultaneously.A kind of promptly because the adhesion stress at anchor pole sliding surface place is not enough; When reaching maximum value, the shearing force at sliding surface place between anchor rod body and the grouting body relative slip will take place; Shearing force is transmitted to the anchoring section far-end with progressive mode; Along with the increase of anchor pole bearing load value, shift combination stress along anchorage length with the mode that is similar to friction pile and finally cause destroying owing to anchor pole can not bear its value, be called injecting cement paste and body of rod interfacial failure.Ultimate tension can not be born for the frictional force of mortar in a kind of in addition because anchoring section stratum, and the phenomenon that together is pulled out with injecting cement paste will take place anchor pole, is called the interfacial failure of the injecting cement paste and the soil body.
The cement grout that uses in the ground stabilization generally all is neat slurry, through practice for many years, adopts the agitation pile of this neat slurry, and pile intensity is lower in clay stratum.
Comprehensive current theoretical research and engineering measurement achievement; Common two kinds of mode of failure to anchor pole; How the cutting point that we find to improve anti-pulling of anchor bar for to improve the area and the intensity of dowel body and injecting cement paste contact surface, and how to improve adhesion stress and the force direction between reinforcement body and the anchoring body.
The utility model content
The utility model technical problem to be solved is, overcomes technical problem and fault of construction that existing uplift pile exists, provides a kind of stress distributing of high uplift resistance to add the stake of sand anti-floating.
For the technical scheme that addresses the above problem the utility model is such:
A kind of stress distributing of high uplift resistance adds the stake of sand anti-floating, comprises a pile body, has the muscle body in the pile body, it is characterized in that pile body is mixed by cement mortar.
Said muscle body is connected with stress dispersed structure body, and said reinforcement body and stress dispersed structure body are formed anchoring piece and pile body bonds together.
Said muscle body center and pile body off-centring≤20cm.
The external side of said muscle is provided with the anticorrosion metal tube.
Filling concrete is starched or cement mortar in the gap of muscle body in anticorrosion metal tube and tube.
The weight proportion of said cement mortar slurries is: water: cement: sand=100: (20～200): (20～100), the particle diameter of its medium sand is smaller or equal to 5mm.
Said stress dispersed structure body is a form anchor, and anchor ingot plate is processed by metal or high-strength nonmetals.
Be provided with plural anchor ingot plate in the anchoring section of muscle body, one of them form anchor is arranged on the anchoring section front end of reinforcement body.
Anchor ingot plate and reinforcement body adopt that extruded sleeve is connected, lockset connection, welding or bolt connection.
Described anchor ingot plate is disc or polygon.
Described anchor ingot plate is distributed with the connecting hole of a plurality of reinforcement bodies around centre bore.
Described anchor ingot plate links to each other with one or more reinforcement body simultaneously.
Said muscle body is non-bending steel cable, bonding steel strand, the part materials such as steel strand, wire rope, reinforcing bar, steel pipe, section bar that bond.
A kind of energy-saving stress distributing of high uplift resistance adds the job practices of sand anti-floating stake, may further comprise the steps,
A) at first drilling rod sinks to creeping into, after extract drilling rod, through the shotcrete pipe shotcrete, form the sand-cement pile body;
B) in follow-up drilling rod sinking process, in the sand-cement pile body, insert the resistance to plucking muscle to assigned address;
C) extract drilling rod at last, the resistance to plucking muscle is stayed in the sand-cement pile body.
In a) step drilling rod sinking drilling process, the spraying cement mortar while creeping into.
In a) step, in the drilling rod withdrawal process, carry out the spraying cement mortar simultaneously.
In a) step, form cement soil pile after, drilling rod is extracted, the resistance to plucking muscle is connected on the hoist engine lifts by crane simultaneously, carry out b again) step.
Grouting pressure＜the 35MPa of said shotcrete pipe.
When fixing resistance to plucking muscle, the fastening devices of drilling rod or guide peg lower end is stuck on the resistance to plucking muscle, make that drilling rod or guide peg band the resistance to plucking muscle and got into together in the pile body when sinking to creeping into, when drilling rod or guide peg were extracted, fastening devices can be thrown off from resistance to plucking muscle body.
Carrying out b) before the step, the blade dimensions on the adjustment drilling rod makes blade stirring scope reduce, or remove all or part of blade on the drilling rod, moving frame drives drilling rod or guide peg makes resistance to plucking muscle body aim at the pile body center.
Said drilling rod top unit head power is 3-300KW.
More than the said drilling rod external diameter 20mm, blade diameter 20-1500mm.
Further, more than the long 3m of said stake.
Can draw the hole with power bigger unit head or the stronger drill bit of brill pick ability for the hard soil layer.
The muscle height goes out more than the pile body 10cm.
Further, step a), b), c) in ground or foundation ditch, construct.
The described high uplift resistance of the utility model add the stake of sand anti-floating; On conventional anti-floating pile body basis, adopt cement mortar to carry out slip casting, improved the intensity of pile body; Saved the consumption of cement, and soil cement intensity improves 30% intensity behind the pile than conventional neat slurry rotary churning pile.
Description of drawings
Specify the utility model below in conjunction with the accompanying drawing and the specific embodiment;
Fig. 1 is the structural representation that adds the stake of sand anti-floating of the described high uplift resistance of the utility model.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1; The pile body structure of this high uplift resistance does; Pile body 5 is evenly mixed by cement mortar, and pile body is the pile body 5 that rotary jet stirring pile body or cement mortar grouting form, and buries reinforcement body 4 in the pile body 5 underground; Reinforcement body 4 is connected with anchor ingot plate 3 with a plurality of anchor ingot plates 2, and form anchor 3 links together through extruded sleeve 1.Said form anchor is the form anchor that stress disperses, and also is stress dispersed structure body usually, and anchor ingot plate is processed by metal or high-strength nonmetals.
Said muscle body 4 centers and pile body off-centring≤20cm.Generally be that muscle body 4 centers and pile body center are same center, if muscle body 4 adopts the guide rod different with drilling rod to bring into, then muscle body 4 often has skew.
Said muscle body 4 arranged outside have anticorrosion metal tube 6.
Filling concrete is starched or cement mortar in the gap of muscle body 4 in anticorrosion metal tube 6 and pipe.
The weight proportion of said cement mortar slurries is: water: cement: sand=100: (20～200): (20～100), the particle diameter of its medium sand is smaller or equal to 5mm.
Be provided with more than one anchor ingot plate in the anchoring section of muscle body 4, one of them form anchor of a plurality of form anchors is arranged on the anchoring section front end of reinforcement body.
Described anchor ingot plate is disc or polygon.
Described anchor ingot plate is distributed with the connecting hole of a plurality of reinforcement bodies around centre bore.
Described anchor ingot plate links to each other with one or more reinforcement body simultaneously.
Said muscle body is non-bending steel cable, bonding steel strand, the part materials such as steel strand, wire rope, reinforcing bar, steel pipe, section bar that bond.
Cement paste pile body 5 usefulness well cementings form, and the pile body 5 of rotary jet stirring utilizes jet grouting and stirring drill tool to execute work.
After forming this pile body 5,, adopt special drilling tool, be sent in the pile body along the center of this pile body and go reinforcement body 4 and anchor ingot plate 2 and anchor ingot plate 3, insert put in place after, on one side pumpback drilling tool, rotary jet grouting in pile body on one side.
Anchor ingot plate 2 is to be processed from strand by steel plate with anchor ingot plate 3.
The job practices that adds the stake of sand anti-floating of high uplift resistance may further comprise the steps,
A kind of energy-saving stress distributing of high uplift resistance adds the job practices of sand anti-floating stake, may further comprise the steps,
A) at first drilling rod sinks to creeping into, after extract drilling rod, through the shotcrete pipe shotcrete, form the sand-cement pile body;
B) in follow-up drilling rod sinking process, in the sand-cement pile body, insert the resistance to plucking muscle to assigned address;
C) extract drilling rod at last, the resistance to plucking muscle is stayed in the sand-cement pile body.
In a) step drilling rod sinking drilling process, the spraying cement mortar while creeping into.
In a) step, in the drilling rod withdrawal process, carry out the spraying cement mortar simultaneously.
In a) step, form cement soil pile after, drilling rod is extracted, the resistance to plucking muscle is connected on the hoist engine lifts by crane simultaneously, carry out b again) step.
Grouting pressure＜the 35MPa of said shotcrete pipe.
When fixing resistance to plucking muscle, the fastening devices of drilling rod or guide peg lower end is stuck on the resistance to plucking muscle, make that drilling rod or guide peg band the resistance to plucking muscle and got into together in the pile body when sinking to creeping into, when drilling rod or guide peg were extracted, fastening devices can be thrown off from resistance to plucking muscle body.
Carrying out b) before the step, the blade dimensions on the adjustment drilling rod makes blade stirring scope reduce, and perhaps removes all or part of blade, moving frame drives drilling rod or guide peg makes resistance to plucking muscle body aim at the pile body center.
Said drilling rod top unit head power is 3-300KW.
More than the said drilling rod external diameter 20mm, blade diameter 20-1500mm.
Further, more than the long 3m of said stake.
Can draw the hole with power bigger unit head or the stronger drill bit of brill pick ability for the hard soil layer.
The muscle height goes out more than the pile body 10cm.
Further, step a), b), c) in ground or foundation ditch, construct.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the manual that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (12)
1. the stress distributing of a high uplift resistance adds the stake of sand anti-floating, comprises a pile body, has the muscle body in the pile body, it is characterized in that pile body is mixed by cement mortar.
2. the stress distributing of a kind of high uplift resistance according to claim 1 adds the stake of sand anti-floating, it is characterized in that, said muscle body is connected with stress dispersed structure body, and said reinforcement body and stress dispersed structure body are formed anchoring piece and pile body bonds together.
3. the stress distributing of a kind of high uplift resistance according to claim 1 adds the stake of sand anti-floating, it is characterized in that, said muscle body center and pile body off-centring≤20cm.
4. the stress distributing of a kind of high uplift resistance according to claim 1 adds the stake of sand anti-floating, it is characterized in that, the external side of said muscle is provided with the anticorrosion metal tube.
5. the stress distributing of a kind of high uplift resistance according to claim 3 adds the stake of sand anti-floating, it is characterized in that, filling concrete is starched or cement mortar in the gap of muscle body in anticorrosion metal tube and tube.
6. the stress distributing of a kind of high uplift resistance according to claim 2 adds the stake of sand anti-floating, it is characterized in that, said stress dispersed structure body is a form anchor, and anchor ingot plate is processed by metal or high-strength nonmetals.
7. the stress distributing of a kind of high uplift resistance according to claim 5 adds the stake of sand anti-floating, it is characterized in that, is provided with plural anchor ingot plate in the anchoring section of muscle body, and one of them form anchor is arranged on the anchoring section front end of reinforcement body.
8. the stress distributing of a kind of high uplift resistance according to claim 5 adds the stake of sand anti-floating, it is characterized in that, anchor ingot plate and reinforcement body adopt that extruded sleeve is connected, lockset connection, welding or bolt connection.
9. the stress distributing of a kind of high uplift resistance according to claim 5 adds the stake of sand anti-floating, it is characterized in that, described anchor ingot plate is disc or polygon.
10. the stress distributing of a kind of high uplift resistance according to claim 5 adds the stake of sand anti-floating, it is characterized in that, described anchor ingot plate is distributed with the connecting hole of a plurality of reinforcement bodies around centre bore.
11. the stress distributing of a kind of high uplift resistance according to claim 5 adds the stake of sand anti-floating, it is characterized in that, described anchor ingot plate links to each other with one or more reinforcement body simultaneously.
12. the stress distributing of a kind of high uplift resistance according to claim 2 adds the stake of sand anti-floating, it is characterized in that, said muscle body is non-bending steel cable, bonding steel strand, the part materials such as steel strand, wire rope, reinforcing bar, steel pipe, section bar that bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120534909 CN202450520U (en) | 2011-12-19 | 2011-12-19 | High-pulling resistance stress-distributed sand adding anti-floating pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120534909 CN202450520U (en) | 2011-12-19 | 2011-12-19 | High-pulling resistance stress-distributed sand adding anti-floating pile |
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| Publication Number | Publication Date |
|---|---|
| CN202450520U true CN202450520U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120534909 Expired - Lifetime CN202450520U (en) | 2011-12-19 | 2011-12-19 | High-pulling resistance stress-distributed sand adding anti-floating pile |
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| Country | Link |
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| CN (1) | CN202450520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493441A (en) * | 2011-12-19 | 2012-06-13 | 上海强劲地基工程股份有限公司 | Stress-dispersed type sand-adding anti-floating pile with high pull-out resistance and construction method thereof |
-
2011
- 2011-12-19 CN CN 201120534909 patent/CN202450520U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493441A (en) * | 2011-12-19 | 2012-06-13 | 上海强劲地基工程股份有限公司 | Stress-dispersed type sand-adding anti-floating pile with high pull-out resistance and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |