CN108517901A - Double casing structures for test pile - Google Patents
Double casing structures for test pile Download PDFInfo
- Publication number
- CN108517901A CN108517901A CN201810245639.4A CN201810245639A CN108517901A CN 108517901 A CN108517901 A CN 108517901A CN 201810245639 A CN201810245639 A CN 201810245639A CN 108517901 A CN108517901 A CN 108517901A
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- China
- Prior art keywords
- casing
- outer casing
- interior
- water filling
- test pile
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The present invention relates to the technical fields of ground dead load test pile, disclose double casing structures for test pile, including outer casing, the interior casing of the inside for being placed in outer casing and multiple for outer casing and the relatively-stationary fixed link of interior casing, interior casing has glade plane space with outer casing；Outer casing is equipped with water filling port, and water filling port is connected to glade plane space, and outer casing is equipped with the waterstop for preventing the water filling of water filling port institute from flowing out glade plane space；When inside outer casing and interior casing insertion foundation pit, outer casing and soil layer contact, interior casing is contacted with pile body, and when cutting off multiple fixed links, outer casing can opposite sliding with interior casing.By water filling port water filling, noted water filling is made to enter in glade plane space, greatly reduces the resistance between outer casing and interior casing；After test pile completion reaches age, fixed link is cut off so that outer casing can be free to slide with interior casing, and the side friction of empty pile cutoff has thoroughly been isolated, and is effectively ensured and collects true, reliable, effective detection data.
Description
Technical field
The present invention relates to the technical fields of ground dead load test pile, more particularly to are used for double casing structures of test pile.
Background technology
With urban construction fast development, high-rise building is more and more, and building foundation engineering stake stress is increasing,
Accurately to calculate bearing capacity of pile foundation, before foundation engineering pile driving construction carry out pile foundation static load test pile become increasingly it is necessary to.
But as the depth of deep-foundation pit engineering increases, engineering pile dead load test pile is also got in the difficulty of foundation pit bottom application work
Come bigger；When especially deep basal pit is supported using multiple tracks concrete when structure, the dead load of engineering pile can not be implemented at foundation pit bottom at all
Experiment.
In the prior art, the foundation engineering of generally deeper and larger foundation pit carries out drill-pouring static load test for pile and exists
It is carried out on ground, the bearing capacity of pile foundation is made of bearing capacity of pile tip and two part of pile side friction, due to implementing static load on ground
Lotus is tested, and the pile side friction on deep pit digging section stratum is contained in test result, can not really reflect foundation pit bottom engineering pile
Bearing capacity actual conditions.
Invention content
The purpose of the present invention is to provide double casing structures for test pile, it is intended to which bored concrete pile is implemented in solution in the prior art
Static load test, the problem of test result inaccuracy.
The invention is realized in this way double casing structures for test pile, including outer casing, be placed in the outer casing
The interior casing in portion and multiple for the outer casing and the interior relatively-stationary fixed link of casing, the interior casing with it is described
Outer casing has glade plane space；Outer casing is equipped with water filling port, and the water filling port is connected to the glade plane space, and the outer casing is equipped with
For preventing water filling port institute water filling from flowing out the waterstop of the glade plane space；When the outer casing and the interior casing are embedding
When entering inside foundation pit, the outer casing and soil layer contact, the interior casing are contacted with pile body, when cutting off multiple fixed links
When, the outer casing and the interior casing can be relative to slidings.
When further, inside the outer casing and interior casing insertion foundation pit, the outer casing and described
Interior casing is above the ground level.
When further, inside the outer casing and the interior casing insertion foundation pit, the water filling port is placed in described
The top of waterstop.
Further, multiple fixed links are set to the top of the outer casing, and multiple fixed link interlaced arrangements.
Further, multiple fixed links use rigid connection with the oversheath and the interior casing, each described
Rigid connection is used between fixed link.
Further, the waterstop is annularly arranged around the interior casing, and described in the waterstop contradicts respectively
Interior casing and the outer casing.
Further, along the length direction of the outer casing, the glade plane space is equipped with multiple sequentially spaced apart rings
Shape floor.
Compared with prior art, provided by the present invention for double casing structures of test pile, by water filling port water filling, make to be noted
Water filling enter in glade plane space, greatly reduce the resistance between outer casing and interior casing；It, will after test pile completion reaches age
Fixed link is cut off so that outer casing can be free to slide with interior casing, due in outer casing and interior casing insertion foundation pit
Behind portion, outer casing and soil layer contact, interior casing are contacted with pile body, the side friction of empty pile cutoff have thoroughly been isolated, in this way, trying
When the static load or resistance to plucking of stake detect, it is effectively ensured and collects true, reliable, effective detection data；Greatly improve test pile
Construction and detection keep the data of test pile experiment acquisition truer, more intuitive, more reliable, have to the limitation of place space requirement
Effect is that follow-up Pile Foundations Design provides foundation.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram on the top of the casing of double casing structures provided in an embodiment of the present invention for test pile；
Fig. 2 is the stereoscopic schematic diagram of the bottom end of the casing of double casing structures provided in an embodiment of the present invention for test pile.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The same or similar label correspond to the same or similar components in the attached drawing of the present embodiment；In description of the invention
In, it is to be understood that if there is the orientation or positional relationship of the instructions such as term "upper", "lower", "left", "right" for based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated dress
It sets or element must have a particular orientation, with specific azimuth configuration and operation, therefore the use of position relationship described in attached drawing
Language only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term is understood as the case may be.
The realization of the present invention is described in detail below in conjunction with specific embodiment.
Referring to Fig.1 shown in -2, preferred embodiment is provided for the present invention.
For double casing structures of test pile, implement perfusion static load test for pile for solving, test result is inaccurate to ask
Topic.
It is set for double casing structures of test pile, including outer casing 10, interior casing 20 and multiple fixed links 40, interior casing 20
In the inside of outer casing 10, multiple fixed links 40 are relatively fixed for outer casing 10 with interior casing 20, interior casing 20 and outer casing
10 have glade plane space.
Outer casing 10 is equipped with water filling port 50, and water filling port 50 is connected to glade plane space and can be injected water by 50 water filling of water filling port
Glade plane space；Outer casing 10 is equipped with waterstop 30, and waterstop 30 is for preventing 50 water filling outflow glade plane spaces of water filling port so that
The water that water filling port 50 is noted is in glade plane space；When outer casing 10 and interior casing 20 are embedded in inside foundation pit, outer casing 10
It is contacted with soil layer, interior casing 20 is contacted with pile body, and when cutting off multiple fixed links 40, outer casing 10 and interior casing 20 can be opposite
In sliding.
Above-mentioned double casing structures for test pile make noted water filling enter glade plane space by 50 water filling of water filling port
In, greatly reduce the resistance between outer casing 10 and interior casing 20；After test pile completion reaches age, fixed link 40 is cut
It removing so that outer casing 10 can be free to slide with interior casing 20, after outer casing 10 and the insertion foundation pit of interior casing 20 inside,
Outer casing 10 and soil layer contact, interior casing 20 are contacted with pile body, the side friction of empty pile cutoff have thoroughly been isolated, in this way, trying
When the static load or resistance to plucking of stake detect, it is effectively ensured and collects true, reliable, effective detection data；Greatly improve test pile
Construction and detection keep the data of test pile experiment acquisition truer, more intuitive, more reliable, have to the limitation of place space requirement
Effect is that follow-up Pile Foundations Design provides foundation.
In the present embodiment, when inside outer casing 10 and the insertion foundation pit of interior casing 20, outer casing 10 and interior casing 20
It is above the ground level；In this way, when externally casing 10 and interior casing 20 are fixed, effectively avoid for fixed outer casing 10 and interior
The cement mortar of casing 20 enters glade plane space and enters the inside of outer casing 10 and interior casing 20；In addition, being arranged so just
In the insertion and recycling of outer casing 10 and interior casing 20.
When outer casing 10 and interior casing 20 are embedded in inside foundation pit, water filling port 50 is placed in the top of waterstop 30；It is convenient for
Water filling is carried out to glade plane space, while ensureing that noted water is in glade plane space.
Furthermore water filling port 50 is in the top of outer casing 10 and interior casing 20, in this way, convenient for being noted to glade plane space
Water, while increasing the water filling range of glade plane space, ensure flood effectiveness.
Outer casing 10 and interior casing 20 form double casings, and when inside double casings insertion foundation pit, the top of double casings is high
In ground, and the top of double casings has away from the upper surface of foundation pit, and water filling port 50 is located at the upper surface of double casings, in this way,
Water filling is carried out to glade plane space convenient for passing through water filling port 50.
Double casings are made by 12mm steel plates, wherein a diameter of d1 (d1=test pile diameters+50mm) of interior casing 20,
The length L1=sky pile cutoff length+300mm+500mm of interior casing 20；A diameter of d2 (d2=d1+100mm) of outer casing 10, outside
The length L2=L1-500mm of casing 10.
In addition, water filling port 50 is equipped with diversion section, diversion section along extending upward away from foundation pit direction, in this way, when carrying out water filling
When, external water injection pipe is attached in diversion section, is convenient for water filling.
Specifically, multiple fixed links 40 are set to the top of outer casing 10, it is convenient for subsequently carrying out multiple fixed links 40 in this way
It cuts off；40 interlaced arrangement of multiple fixed links, in this way, when outer casing 10 and interior casing 20 are transported through, bury, in fixed link
Under 40 effects, enhance the relative securement of outer casing 10 and interior casing 20.
Multiple fixed links 40 use rigid connection with oversheath and interior casing 20, are connected using hardness between each fixed link 40
It connects；The advantages of this arrangement are as follows effectively ensureing the fixed function of fixed link 40, to ensure outer casing 10 and interior casing 20
Relative securement.
The top of outer casing 10 is equipped with fixed link 40, and the top of interior casing 20 is equipped with fixed link 40, the fixation of outer casing 10
The fixed link 40 of bar 40 and interior casing 20 is interlocked rigid connection, being relatively fixed for outer casing 10 and interior casing 20 is realized, by cutting
Except casing 10 fixed link 40 and interior casing 20 fixed link 40, realize that outer casing 10 is opposite with interior casing 20 and slide.
Specifically, waterstop 30 is around the arrangement annular in shape of interior casing 20, also, waterstop 30 contradicts respectively interior casing 20 with
And outer casing 10；In this way, along the circumferencial direction of interior casing 20, waterstop 30 can effectively seal the water in glade plane space
It is stifled, prevent water from flowing out glade plane space.
Above-mentioned glade plane space is formed along the circumference of interior casing 20, in this way, carrying out water filling, the water noted by water filling port 50
The resistance that outer casing 10 and interior casing 20 can be reduced to the greatest extent collects true, reliable, effective inspection to be effectively ensured
Measured data.
In the present embodiment, along the length direction of outer casing 10, glade plane space is equipped with multiple annular plates sequentially arranged, more
It is arranged one every 5 meters among a annular plate；Under the action of annular plate, the outer casing 10 of effective reinforcing plate and interior shield
The rigidity of cylinder 20, to improve the service life of outer casing 10 and interior casing 20.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. double casing structures for test pile, which is characterized in that the interior casing including outer casing, the inside for being placed in the outer casing
And it is multiple for the outer casing and the interior relatively-stationary fixed link of casing, the interior casing has with the outer casing
Glade plane space；Outer casing is equipped with water filling port, and the water filling port is connected to the glade plane space, and the outer casing is equipped with for preventing
State the waterstop that the glade plane space is flowed out in the water filling of water filling port institute；Inside the outer casing and the interior casing insertion foundation pit
When, the outer casing and soil layer contact, and the interior casing is contacted with pile body, when cutting off multiple fixed links, the outer shield
Cylinder and the interior casing can be relative to slidings.
2. being used for double casing structures of test pile as described in claim 1, which is characterized in that when the outer casing and described interior
When casing is embedded in inside foundation pit, the outer casing and the interior casing are above the ground level.
3. being used for double casing structures of test pile as described in claim 1, which is characterized in that when the outer casing and described interior
When casing is embedded in inside foundation pit, the water filling port is placed in the top of the waterstop.
4. double casing structures for test pile as described in claim 1-3 any one, which is characterized in that multiple fixations
Bar is set to the top of the outer casing, and multiple interlaced arrangements of the fixed link.
5. double casing structures for test pile as described in claim 1-3 any one, which is characterized in that multiple fixations
Bar uses rigid connection with the oversheath and the interior casing, and rigid connection is used between each fixed link.
6. double casing structures for test pile as described in claim 1-3 any one, which is characterized in that the sealing band
It is annularly arranged around the interior casing, and the waterstop contradicts the interior casing and the outer casing respectively.
7. double casing structures for test pile as described in claim 1-3 any one, which is characterized in that along the outer casing
Length direction, the glade plane space be equipped with multiple sequentially spaced apart annular plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810245639.4A CN108517901A (en) | 2018-03-23 | 2018-03-23 | Double casing structures for test pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810245639.4A CN108517901A (en) | 2018-03-23 | 2018-03-23 | Double casing structures for test pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108517901A true CN108517901A (en) | 2018-09-11 |
Family
ID=63432956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810245639.4A Pending CN108517901A (en) | 2018-03-23 | 2018-03-23 | Double casing structures for test pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108517901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459141A (en) * | 2020-12-01 | 2021-03-09 | 武汉建工集团股份有限公司 | Uplift pile uplift resistance detection method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106065622A (en) * | 2016-07-19 | 2016-11-02 | 中建局集团建设发展有限公司 | The double sleeve of the efficient drag reduction of pullout tests stake and pullout tests stake drag reduction method |
-
2018
- 2018-03-23 CN CN201810245639.4A patent/CN108517901A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106065622A (en) * | 2016-07-19 | 2016-11-02 | 中建局集团建设发展有限公司 | The double sleeve of the efficient drag reduction of pullout tests stake and pullout tests stake drag reduction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459141A (en) * | 2020-12-01 | 2021-03-09 | 武汉建工集团股份有限公司 | Uplift pile uplift resistance detection method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180911 |