CN104314109A - Experiment device of simulation pile box - Google Patents
Experiment device of simulation pile box Download PDFInfo
- Publication number
- CN104314109A CN104314109A CN201410601477.5A CN201410601477A CN104314109A CN 104314109 A CN104314109 A CN 104314109A CN 201410601477 A CN201410601477 A CN 201410601477A CN 104314109 A CN104314109 A CN 104314109A
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- stake
- caisson
- experimental facilities
- simulation
- pile
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Instructional Devices (AREA)
Abstract
The invention discloses an experiment device of a simulation pile box. The experiment device comprises a caisson (10) and at least one pile (20), each pile (20) is detachably mounted on a pile mounting portion of the caisson (10), and one end of each pile (20) extends out from the lower end of the caisson (10). Each pile (20) is mounted on the pile mounting portion in a manner of being adjustable in mounting position relative to the pile mounting portion along respective length direction to enable extending length of each pile (20) from the caisson (10) to be adjustable so as to stimulate various pile lengths and various pile length combination, so that experiment cost is saved.
Description
Technical field
The present invention relates to the experimental facilities of simulation stake case.
Background technology
In building trade, application has laying foundation and pile foundation widely.But the anti-seismic performance of this single basis (i.e. laying foundation and pile foundation) is unsatisfactory.After particularly have passed through nineteen ninety-five the big earthquakes in Osaka and Kobe,Japan, people start to find and had a kind ofly both had good anti-seismic performance, also there is the foundation structure of good load-carrying properties, so design defines a kind of Piled-box foundaton, and start to study for this novel foundation.
In " highrise building raft shape and box foundation technical specification ", 6.4.1 bar specifies " when the natural foundation bearing capacity under mat foundation or box foundation or sedimentation value can not meet design requirement, can adopt a raft or Piled-box foundaton.Pile installation should determine according to factors such as engineering geology situation, structure types, load character, execution conditions and economic indicators.The design of stake should meet the regulation of national current standard " Code for design of building " GB50007 and " technical code for building pile foundation " JGJ 94, and the pile foundation in the district that provides fortification against earthquakes still should meet the regulation of existing national standards " seismic design provision in building code " GB 50011 ".
But, due to the complexity of Piled-box foundaton structure, be difficult to determine integrally-built mechanical characteristic by field trial in different Specific construction environment, and the impact that stake type, the various index parameters of Pile arrangement on mass-type foundation structure cause.
Therefore, in order to remedy such and insufficient, just need to test Piled-box foundaton optimum pile installation under the condition of concrete engineering geology situation, structure types, load character, execution conditions and economic indicator.Wherein, centrifugal model test can reduce natural stress field, thus studies quiet, the power of Piled-box foundaton and seismic response, has the meaning of particular importance.
As one of research emphasis is the long impact of stake.But, because the long and even long combination of multiple stake of multiple stake tested by needs, therefore also need multiple model to simulate this Piled-box foundaton, so just cause experimental cost high.
And change model for needs, also result in the waste of experimental period.In addition, also when changing model, because the position of box foundation changes, and may cause and reliably cannot obtain the experimental data of the long change in length of stake on the impact of stake case performance.
Therefore, how under the prerequisite simulating actual set-up mode as much as possible, can also utilize expediently in centrefuge experiment device and detect different pile installation and which kind of can cause affect on the various index parameters on basis.
Summary of the invention
Technical problem to be solved by this invention can simulate the long Piled-box foundaton experimental facilities of multiple stake for providing a kind of, and this Piled-box foundaton experimental facilities can be recycled and simulate piles with different and to look effective experimental data, thus can reduce experimental cost.
The invention provides a kind of experimental facilities of simulating a case, comprise caisson and at least one pile, on the stake installation portion that stake described in each is removably mounted on described caisson and respective one end is all stretched out from the lower end of described caisson, stake described in each is installed as and can regulates installation site relative to described stake installation portion along respective length direction on described stake installation portion, and the length of stretching out from described caisson to make stake described in each can regulate.
Preferably, described experimental facilities comprises many described stakes, and described stake is arranged parallel to each other.
Preferably, described caisson comprises caisson sidewall and the caisson top board for closing described caisson sidewall upper and lower end and Bottom plate of sinkbox, and described stake runs through providing holes corresponding on described Bottom plate of sinkbox.
Preferably, described stake is provided with external screw thread, providing holes described in each is screwed hole using as described stake installation portion, and stake described in each is installed on described Bottom plate of sinkbox with corresponding described providing holes threaded engagement.
Preferably, described caisson also comprises the median septum be fixed on described caisson sidewall, described median septum in described caisson between described caisson top board and Bottom plate of sinkbox, stake described in each is provided with external screw thread, described median septum is provided with the installation screwed hole as described stake installation portion, stake described in each is installed on described median septum with corresponding described installation screwed hole threaded engagement.
Preferably, described stake is locked on described median septum by locking nut.
Preferably, described caisson top board is removably connected to the upper end of described caisson sidewall.
Preferably, described caisson top board is connected to the upper end of described caisson sidewall by threaded fastener.
Pass through technique scheme, due in the experimental facilities of simulation stake case of the present invention, on the stake installation portion that stake described in each is removably mounted on described caisson and respective one end is all stretched out from the lower end of described caisson, like this, stake described in each is installed as and can regulates installation site relative to described stake installation portion along respective length direction on described stake installation portion, and the length of stretching out from described caisson to make stake described in each can regulate.Therefore, the experimental facilities of simulation stake case of the present invention can simulate the structure of the long Piled-box foundaton formed with caisson of different stakes to carry out various experiment, not only without the need to changing model, thus has saved experimental cost, and has been used in the experimental period changing experimental facilities.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for manual, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the main apparent direction schematic diagram of a kind of detailed description of the invention of the experimental facilities of simulation stake case provided by the present invention.
Fig. 2 be a kind of detailed description of the invention of the experimental facilities of simulation stake case provided by the present invention overlook direction schematic diagram.
Description of reference numerals
10 caisson 11 caisson sidewalls
12 Bottom plate of sinkbox 13 caisson top boards
14 providing holes 15 median septums
20 30 locking nuts
40 threaded fasteners
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
The invention provides a kind of experimental facilities of simulating a case, comprise caisson 10 and at least one pile 20, on each 20 stake installation portion being removably mounted on caisson 10 and respective one end is all stretched out from the lower end of caisson 10, each 20 is installed as the installation site that can regulate along respective length direction relative to stake installation portion on the stake installation portion of caisson 10, can regulate to make each 20 length of stretching out from caisson 10.
In the present invention, stake 20 and caisson 10 can be made up of materials such as aluminium alloys, steel, organic glass.Selecting of material can according to engineering geology situation, structure types, load character, execution conditions and economic indicator etc., can simulate behavior in service in reality as much as possible to make stake 20 and caisson 10.And stake 20 and caisson 10 can either use same material to make, not same material also can be used to make.
Also have, stake 20 is removably mounted on the stake installation portion of caisson 10, dismountable mounting means can be multiple, such as utilize air-setting, the cementing agent of high temperature melting is connected and fixed, or utilization is spirally connected fixing, snap ring can also be utilized to snap fit onto the groove be arranged in stake 20, utilize this snap ring stake 20 to be releasably attached in caisson 10.
In addition, this caisson 10 can be formed as various shape, the cylinder of such as hollow, the cube etc. of hollow.Stake 20 can either be formed as solid pile.In addition, the stake of hollow can be also formed as according to actual needs, now, when carrying out centrefuge experiment, preferably foil gauge is arranged in the inwall of stake 20, thus when changing stake and being long, the adjustment of foil gauge can not be carried out, thus shorten the time arranged required for experimental facilities further.
This experimental facilities comprises many piles 20, and stake 20 is arranged parallel to each other.Particularly, as shown in Figure 2, in this experimental facilities, caisson is provided with four piles, and distributes along the even circumferential of the caisson being formed as hollow circular cylinder.
As a kind of concrete embodiment, caisson 10 comprise caisson sidewall 11 with for the caisson top board 13 of closed caisson sidewall 11 top and bottom and Bottom plate of sinkbox 12, stake 20 runs through providing holes 14 corresponding on Bottom plate of sinkbox 12.Particularly, Bottom plate of sinkbox 12 can come by the mode of welding with caisson sidewall 11 effectively to close caisson sidewall 11, and holds the turnover of stake 20 by providing holes 14.
Particularly, stake 20 is provided with external screw thread, each providing holes 14 is screwed hole using as stake installation portion, and each 20 is installed on Bottom plate of sinkbox 12 with corresponding described providing holes 14 threaded engagement.
In addition, in order to stake 20 is more reliably remained in caisson 10, caisson 10 also comprises the median septum 15 be fixed on caisson sidewall 11, median septum 15 is in caisson 10 and between caisson top board 13 and Bottom plate of sinkbox 12, each stake 20 is provided with external screw thread, median septum 15 is provided with the installation screwed hole as stake installation portion, each is installed on median septum 15 with corresponding described installation screwed hole threaded engagement.Like this, can, by increasing this limit point of median septum 15, come more effectively to be fixed stake 20.
Particularly, stake 20 is locked on median septum 15 by locking nut 30, thus stake 20 is fixed in caisson 10.
Caisson top board 13 is removably connected to the upper end of described caisson sidewall 11.Preferably, caisson top board 13 is connected to the upper end of caisson sidewall 11 by threaded fastener 40, thus can regulate the distance that stake 20 is stretched out from Bottom plate of sinkbox 12 easily.
In addition, in the present invention, the stake 20 of different lengths can be prepared, and combinationally use in the experimental facilities of simulation stake case.
Below the process of the test of the experimental facilities to preferred described simulation stake case is described, but this not should be understood to limitation of the present invention.Wherein:
1) experimental facilities of simulation stake case is made, caisson sidewall 11, Bottom plate of sinkbox 12, caisson top board 13, the individual components of median septum 15 all for being formed by steel, first Bottom plate of sinkbox 12 is welded to caisson sidewall 11, then median septum 15 is welded to the centre position of caisson sidewall 11.Afterwards, by stake 20 through the providing holes 14 on Bottom plate of sinkbox 12 and the installation screwed hole on median septum 15, and be locked in caisson 10 by locking nut 30.
2) the actual Site Type of simulating as required, layered backfill in model groove, spreads water, and tamping flattens.In the process of banketing, experimental facilities is imbedded assigned address.
3) multiple foil gauge is set on the surface of caisson sidewall 11 and stake 20, all foil gauges are connected to strain acquirement instrument.
4) input signal, starts centrifuge test.
5) distortion of sandy soils in viewing test process, and the strain data of collection model stake and casing.
6) change stake 20 length of stretching out from Bottom plate of sinkbox 12, by step 4,5 mode carry out loadings also image data.
7) disposal data.
More than be the concrete process of the test of experimental facilities in centrifugal test of simulation stake case of the present invention, owing to can adjust the length that stake 20 is stretched out from Bottom plate of sinkbox 12 in process of the test, therefore, it is possible to simulate the long and even long combination of multiple stake of multiple stake, thus save experimentation cost.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (8)
1. simulate the experimental facilities of a case for one kind, it is characterized in that, comprise caisson (10) and at least one pile (20), on the stake installation portion that stake described in each (20) is removably mounted on described caisson (10) and respective one end is all stretched out from the lower end of described caisson (10), stake described in each (20) is installed as and can regulates installation site relative to described stake installation portion along respective length direction on described stake installation portion, can regulate with the length making stake described in each (20) stretch out from described caisson (10).
2. the experimental facilities of simulation stake case according to claim 1, is characterized in that, described experimental facilities comprises many described stakes (20), and described stake (20) is arranged parallel to each other.
3. the experimental facilities of simulation stake case according to claim 1, it is characterized in that, described caisson (10) comprises caisson sidewall (11) and the caisson top board (13) for closing described caisson sidewall (11) top and bottom and Bottom plate of sinkbox (12), and described stake (20) runs through the upper corresponding providing holes (14) of described Bottom plate of sinkbox (12).
4. the experimental facilities of simulation stake case according to claim 3, it is characterized in that, (20) are provided with external screw thread in described stake, providing holes described in each (14) is for screwed hole is using as described stake installation portion, and stake described in each (20) is installed on described Bottom plate of sinkbox (12) with corresponding described providing holes (14) threaded engagement.
5. the experimental facilities of simulation stake case according to claim 3, it is characterized in that, described caisson (10) also comprises the median septum (15) be fixed on described caisson sidewall (11), described median septum (15) is positioned between described caisson top board (13) and Bottom plate of sinkbox (12) in described caisson (10), (20) are provided with external screw thread in stake described in each, described median septum (15) is provided with the installation screwed hole as described stake installation portion, stake described in each (20) is installed on described median septum (15) with corresponding described installation screwed hole threaded engagement.
6. the experimental facilities of simulation stake case according to claim 5, is characterized in that, described stake (20) is locked on described median septum (15) by locking nut (30).
7. the experimental facilities of the simulation stake case according to any one of claim 3 to 6, is characterized in that, described caisson top board (13) is removably connected to the upper end of described caisson sidewall (11).
8. the experimental facilities of simulation stake case according to claim 7, is characterized in that, described caisson top board (13) is connected to the upper end of described caisson sidewall (11) by threaded fastener (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601477.5A CN104314109B (en) | 2014-10-30 | 2014-10-30 | The experimental facilities of simulation stake case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601477.5A CN104314109B (en) | 2014-10-30 | 2014-10-30 | The experimental facilities of simulation stake case |
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| Publication Number | Publication Date |
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| CN104314109A true CN104314109A (en) | 2015-01-28 |
| CN104314109B CN104314109B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410601477.5A Active CN104314109B (en) | 2014-10-30 | 2014-10-30 | The experimental facilities of simulation stake case |
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| Country | Link |
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| CN (1) | CN104314109B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193722A (en) * | 2018-03-09 | 2018-06-22 | 河南理工大学 | Strip footing model test apparatus by the side slope of integrated micro stake supporting |
| CN110424440A (en) * | 2019-08-23 | 2019-11-08 | 东北大学 | A kind of composite pile foundation basis of open caisson staking |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193722A (en) * | 2018-03-09 | 2018-06-22 | 河南理工大学 | Strip footing model test apparatus by the side slope of integrated micro stake supporting |
| CN108193722B (en) * | 2018-03-09 | 2023-09-29 | 河南理工大学 | Side slope side strip foundation model test device for integrated miniature pile support |
| CN110424440A (en) * | 2019-08-23 | 2019-11-08 | 东北大学 | A kind of composite pile foundation basis of open caisson staking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104314109B (en) | 2016-04-06 |
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