CN206328785U - A kind of loading device for pile foundation static test - Google Patents
A kind of loading device for pile foundation static test Download PDFInfo
- Publication number
- CN206328785U CN206328785U CN201621315654.4U CN201621315654U CN206328785U CN 206328785 U CN206328785 U CN 206328785U CN 201621315654 U CN201621315654 U CN 201621315654U CN 206328785 U CN206328785 U CN 206328785U
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- China
- Prior art keywords
- crossbeam
- loading device
- pile
- support column
- preloading
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Abstract
The utility model discloses a kind of loading device for pile foundation static test, including the crossbeam being arranged on test pile, the fixing device that is arranged on the loading device of crossbeam one end, is arranged on the crossbeam other end；The two ends of the crossbeam are separately positioned on the both sides of the experiment dress；The fixing device includes some support columns being connected with raft foundation, and the other end of the support column and one end of crossbeam are connected；The raft foundation is fixed in soil layer by anchor pole.The utility model utilizes lever principle, reduces the heap carrying capacity required for traditional static test, at the same the utility model use experimental rig by mechanical connection, it is easy for installation, quick, can Reusability, so as to reduce the transport of preloading and the cost of experimental rig.
Description
Technical field
The utility model belongs to Civil Engineering Construction experimental technique field, and in particular to one kind is used for pile foundation static test
Loading device.
Background technology
The high speed development built with Chinese Urbanization and urban land resource it is in short supply, the skyscraper that continues to bring out,
Bearing capacity demand and the construction quality requirement of continuous improvement all make it that high capacity, sedimentation are small, make flexible and applicable
The extensive pile foundation of condition becomes above-mentioned field using most base forms.And according to the requirement of related specifications, need to carry out
Pile foundation carries out static pressure test to evaluate whether its bearing capacity meets design requirement.In traditional pile foundation static test, load
Mainly jack is provided with preloading, and with being continuously increased for bearing capacity, the transport of preloading occupies static test expense
Significant portion.Meanwhile, the ground buttress employed in soft clay area, traditional static test or counter-force stake can be smaller in loading
When produce excessive sedimentation so as to influenceing the measurement of static load displacement in process of the test.
Utility model content
The purpose of this utility model be to solve the difficult technical problem of above-mentioned pile foundation static load high cost, experiment there is provided
A kind of convenient operation, the loading device for pile foundation static test of economical rationality.
In order to solve the above problems, the utility model is achieved by following technical scheme：
Loading device described in the utility model for pile foundation static test, the loading for pile foundation static test is filled
Put, it is characterised in that：Including be horizontally set on test pile some crossbeams, be arranged on the loading device of crossbeam one end, set
Put the fixing device in the crossbeam other end；
The two ends of the crossbeam are separately positioned on the both sides of the test pile；One end of some crossbeams is with the examination
Test stake to be uniformly distributed in a circumferential direction for the center of circle, the fixing device includes some support columns being connected with raft foundation, described
The other end of support column and one end of crossbeam are connected；The raft foundation is fixed in soil layer by some anchor poles.
Further, in order to ensure that crossbeam is horizontally disposed with, jack is provided between the test pile and the crossbeam, is led to
Overregulate jack so that the crossbeam keeps level.
Further, it is uniform in order to load, and test pile end face is avoided damage to, the top of the test pile, which is provided with, to be added
Cushion cap is carried, the jack is arranged between the loading cushion cap and the crossbeam.
Further, load for convenience, the loading device is including preloading frame, by the preloading sash hanger on crossbeam
Some pull bars, the preloading inframe is evenly arranged with some preloadings.
Further, the bottom of the preloading frame, which is provided with some screwed holes, the crossbeam, is provided with so that described draw
The preformed hole that the bar other end runs through；
One end of the pull bar is provided with the external screw thread coordinated with the screwed hole；The other end of the pull bar is provided with expansion
Major part, the enlarged footing is more than the diameter of the preformed hole.
Further, the edge of the preformed hole is provided with groove corresponding with the enlarged footing.
Further, load and unload for convenience, one end of the support column is provided with end plate, and the end plate is by bolt and greatly
Beam is connected；The other end of the support column is arranged with steel bushing, and the steel bushing is embedded on the raft foundation, the support column
The one end being connected with steel bushing is provided with pin hole, the diameter parallel of the axis of the pin hole and the crossbeam, the steel bushing
Cylinder is connected with the support column by inserting the latch of the pin hole.
Further, in order to strengthen overall structure, steadiness is increased, the outer wall of the support column is provided with to be connected with crossbeam
The first diagonal brace connect, the two ends of first diagonal brace are connected by the first diagonal brace end plate with support column or crossbeam respectively；
The second diagonal brace being connected with crossbeam is provided with the preloading frame, the two ends of second diagonal brace pass through second respectively
Diagonal brace end plate is connected with crossbeam or preloading frame.
A kind of loading method for dead load test on pile foundation, comprises the following steps：
S1, raft foundation and test pile are poured, and the steel bushing for support column described in build-in is embedded in the raft foundation
Concrete in, it is by anchor pole that raft foundation is bald in soil layer；
S2, with latch the lower end of support column is fixed in steel bushing；
S3, the axisymmetrical on the top of the test pile along the test pile set some jack, adjustment described thousand
The depth pistion of the height on jin top；
S4, in the piston end of the jack crossbeam is installed, some crossbeams are sequentially overlapped, one end of some crossbeams with institute
State and be distributed uniformly and circumferentially centered on test pile；One end of the crossbeam is connected with support column；The jack causes institute
Crossbeam is stated to be horizontally disposed with；
S5, the preformed hole for inserting pull bar on the crossbeam from top to bottom, and the pull bar lower end is fastened on preloading frame
In upper corresponding screw；
S6, by preloading frame increase preloading realize to test pile load.
Further, the top of the experiment dress is provided with loading cushion cap, and the jack is arranged on the loading cushion cap
On, the jack is set on the central axis Central Symmetry of the test pile；
First diagonal brace is set between the support column and the crossbeam, set between the loading frame and the crossbeam
Second diagonal brace.
Compared with prior art, the beneficial effects of the utility model are：
The utility model utilizes lever principle, reduces the heap carrying capacity required for traditional static test, while this practicality is new
Type use experimental rig by mechanical connection, it is easy for installation, quick, can Reusability so that reduce preloading transport and
The totle drilling cost of experimental rig.
Brief description of the drawings
Embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is that the embodiment one of the loading device described in the utility model for pile foundation static test is bowed to signal
Figure；
Fig. 2 is the lateral signal of the embodiment one of the loading device described in the utility model for pile foundation static test
Figure；
Fig. 3 is the diagrammatic cross-section of A-A in Fig. 1；
Fig. 4 is pull bar and crossbeam connection diagram；
Fig. 5 is the structural representation of the preloading frame described in the utility model for pile foundation static test.
Fig. 6 is the top view of the embodiment two of the loading device described in the utility model for pile foundation static test.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Embodiment one
As shown in Fig. 1~Fig. 5, the loading device described in the utility model for pile foundation static test, including be arranged on
Some crossbeams 2 on test pile 1, the fixing device for being arranged on the loading device of the one end of crossbeam 2, being arranged on the other end of crossbeam 2；This
In embodiment, including four crossbeams 2, the two ends of the crossbeam 2 are separately positioned on the both sides of the test pile 1；The crossbeam 2
One end is uniformly distributed in a circumferential direction with the test pile 1 for the center of circle, and the crossbeam 2, which is sequentially overlapped, is arranged on the test pile
1 top.The top of the test pile 1 is provided with loading cushion cap 7, if being provided between the loading cushion cap 7 and the crossbeam 2
Dry jack 9, the jack 9 is set on the test pile central axis Central Symmetry.
The fixing device includes some support columns 6 being connected with raft foundation 4, the other end and the crossbeam 2 of the support column 6
One end connection.In the present embodiment, support column quantity is 2, but support column of the present utility model 6 is not limited to 2, Ke Yigen
According to experiment need, set 3,4,5,6 etc. it is multiple.One end of the support column 6 is provided with end plate 62, the end plate 62
It is connected by bolt 10 with crossbeam 2；The other end of the support column 6 is arranged with steel bushing 12, and the steel bushing 12 is embedded in institute
State on raft foundation 4, the lower end of support column 6 is provided with some pin holes 61, the lower end of the support column 6 is fixed by latch 8
In steel bushing 12, the pin hole 61 is identical with the direction of crossbeam 2 with the direction of the latch 8.
The raft foundation 4 is fixed in soil layer by some anchor poles 22.
The outer wall of the support column 6 is provided with the first diagonal brace 17 being connected with crossbeam 2, the two ends point of first diagonal brace 17
It is not connected by the first diagonal brace end plate 18 with support column 6 or crossbeam 2.
Some pull bars 5 that the loading device includes preloading frame 3, is suspended on the preloading frame 3 on crossbeam 2, the heap
Carry in frame 5 and be evenly arranged with some preloadings.The bottom of the preloading frame 3 is provided with some screwed holes 31, the crossbeam 2 and set
Have so that the preformed hole 21 that the other end of the pull bar 5 runs through；One end of the pull bar 5 is provided with what is coordinated with the screwed hole 31
External screw thread；The other end of the pull bar 5 is provided with enlarged footing 51, and the enlarged footing 51 is more than the diameter of the preformed hole 21, institute
The edge for stating preformed hole 21 is provided with groove 22 corresponding with the enlarged footing 51.In the present embodiment, the enlarged footing 51 is circle
Frustum, the corresponding groove 22 is circular conical surface.The side wall of preloading frame 3 is steel frame construction, and base plate is by steelframe and steel bushing group
Into.
The second diagonal brace 20 being connected with crossbeam 2 is provided with the preloading frame 3, the two ends of second diagonal brace 20 lead to respectively
The second diagonal brace end plate 21 is crossed to be connected with crossbeam 2 or preloading frame 3 respectively.
A kind of loading method for dead load test on pile foundation, comprises the following steps：
S1, raft foundation 4, test pile 1 and loading cushion cap 7 are poured, and will be pre- for the steel bushing 12 of support column described in build-in 6
In the concrete for being embedded in the raft foundation 4, raft foundation 4 is fixed in soil layer by anchor pole 22.
S2, the lower end of support column 6 is fixed on the latch 8 be mounted in the steel bushing of raft foundation 4.
S3, the axis centre on the test pile 1 on the loading cushion cap 7 are symmetrical arranged some jack 9, adjust
The height of the jack 9 to install after the crossbeam 2, the level of crossbeam 2, and three crossbeams 2, which are sequentially overlapped, is arranged on institute
State on jack 9, one end of three crossbeams 2 is uniformly distributed in a circumferential direction with the test pile 1 for the center of circle.
S4, the preformed hole 21 for inserting pull bar 5 on the crossbeam 2 from top to bottom, and the lower end of pull bar 5 fastening is set
On preloading frame 3 in corresponding screw 31.
S5, between the crossbeam 2 and the support column 6 and between the crossbeam 2 and preloading frame 4 to be respectively mounted first oblique
The diagonal brace 20 of support 17 and second.
S6, installation displacement measuring device, preloading are lifted step by step into the preloading frame 4, to realize adding for static test
Carry.
Embodiment two,
As shown in fig. 6, described in the present embodiment for pile foundation static test loading device except the quantity of crossbeam 2,
Other structures and loading method are identical with embodiment one, and the crossbeam 2 in the present embodiment is three, and one end of crossbeam 2 is to test
Stake is uniformly distributed in a circumferential direction for the center of circle, and the crossbeam 2 is sequentially overlapped on the jack.The utility model is used
The quantity of crossbeam 2 be not limited to 3 or the experiment need according to implementation in 4 in embodiment one or embodiment two
Will, 2 crossbeams, 5 crossbeams etc. are set.
The utility model is fixed crossbeam one end by setting some crossbeams on test pile, other end addition preloading, profit
With lever principle, the loading to test pile is realized, by increasing preloading frame to test pile distance, to reduce heap mounted mass, is reached
Same load effect, and the distribution of a plurality of crossbeam even circumferential so that loading force is evenly.The utility model is used simultaneously
Experimental rig is easy for installation, quick by mechanical connection, can Reusability, so as to reduce transport and the experimental rig of preloading
Cost.
For the loading device of pile foundation static test and the other structures of loading method referring to existing described in the present embodiment
Technology.
The above, is only preferred embodiment of the present utility model, not makees any formal to the utility model
Limitation, it is therefore every without departing from technical solutions of the utility model content, implement according to technical spirit of the present utility model to more than
Example any modification, equivalent variations and the modification made, in the range of still falling within technical solutions of the utility model.
Claims (8)
1. a kind of loading device for pile foundation static test, it is characterised in that：If including being horizontally set on test pile
Dry bar crossbeam, the fixing device for being arranged on the loading device of crossbeam one end, being arranged on the crossbeam other end；
The two ends of the crossbeam are separately positioned on the both sides of the test pile；Some crossbeams are using the test pile as the center of circle
Be uniformly distributed in a circumferential direction, the fixing device include some support columns being connected with raft foundation, the support column it is another
One end and one end of crossbeam are connected；The raft foundation is fixed in soil layer by some anchor poles.
2. it is used for the loading device of pile foundation static test according to claim 1, it is characterised in that：The test pile and institute
State and be provided with jack between crossbeam.
3. it is used for the loading device of pile foundation static test according to claim 2, it is characterised in that：The top of the test pile
End is provided with loading cushion cap, and the jack is arranged between the loading cushion cap and the crossbeam.
4. it is used for the loading device of pile foundation static test according to any one of claims 1 to 3, it is characterised in that：It is described
Loading device includes preloading frame, some pull bars by the preloading sash hanger on crossbeam, and the preloading inframe is provided with some
Preloading.
5. it is used for the loading device of pile foundation static test according to claim 4, it is characterised in that：The bottom of the preloading frame
Portion, which is provided with some screwed holes, the crossbeam, to be provided with so that the preformed hole that the pull bar other end runs through；
One end of the pull bar is provided with the external screw thread coordinated with the screwed hole；The other end of the pull bar is provided with expansion
Head, the enlarged footing is more than the diameter of the preformed hole.
6. it is used for the loading device of pile foundation static test according to claim 5, it is characterised in that：The side of the preformed hole
Edge is provided with groove corresponding with the enlarged footing.
7. it is used for the loading device of pile foundation static test according to claim 5 or 6, it is characterised in that：The support column
One end be provided with end plate, the end plate is connected by bolt with crossbeam；The other end of the support column is arranged with steel bushing, institute
State steel bushing to be embedded on the raft foundation, one end that the support column is connected with steel bushing is provided with pin hole, the latch
The diameter parallel of the axis in hole and the crossbeam, the steel bushing is connected with the support column by inserting the latch of the pin hole
Connect.
8. it is used for the loading device of pile foundation static test according to claim 7, it is characterised in that：Outside the support column
Wall is provided with the first diagonal brace being connected with crossbeam, the two ends of first diagonal brace respectively by the first diagonal brace end plate and support column or
Crossbeam is connected；
The second diagonal brace being connected with crossbeam is provided with the preloading frame, the two ends of second diagonal brace pass through the second diagonal brace respectively
End plate is connected with crossbeam or preloading frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621315654.4U CN206328785U (en) | 2016-12-02 | 2016-12-02 | A kind of loading device for pile foundation static test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621315654.4U CN206328785U (en) | 2016-12-02 | 2016-12-02 | A kind of loading device for pile foundation static test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206328785U true CN206328785U (en) | 2017-07-14 |
Family
ID=59289460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621315654.4U Expired - Fee Related CN206328785U (en) | 2016-12-02 | 2016-12-02 | A kind of loading device for pile foundation static test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206328785U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400856A (en) * | 2016-12-02 | 2017-02-15 | 广州建设工程质量安全检测中心有限公司 | Loading device and method for static load test of pile foundation |
-
2016
- 2016-12-02 CN CN201621315654.4U patent/CN206328785U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400856A (en) * | 2016-12-02 | 2017-02-15 | 广州建设工程质量安全检测中心有限公司 | Loading device and method for static load test of pile foundation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170714 Termination date: 20191202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |