CN104846853A - Multi-pile-foundation simulation testing box - Google Patents
Multi-pile-foundation simulation testing box Download PDFInfo
- Publication number
- CN104846853A CN104846853A CN201510195704.3A CN201510195704A CN104846853A CN 104846853 A CN104846853 A CN 104846853A CN 201510195704 A CN201510195704 A CN 201510195704A CN 104846853 A CN104846853 A CN 104846853A
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- China
- Prior art keywords
- pile
- polynary
- dividing plate
- testing
- foundation
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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 invention provides a multi-pile-foundation simulation testing box which comprises a box body, a testing pile arranged in the box body, testing soil covering the testing pile and a sand cushion layer covering the testing soil. A partition plate and a bottom plate under the partition plate are arranged at the bottom of the box body, a through hole is formed in the partition plate, pressure sensors are arranged on the lateral wall of the box body and the partition plate, the testing pile is arranged on the partition plate through the through hole formed in the partition plate, the testing pile is connected with the bottom plate through a supporting spring, an optical fiber sensor is arranged in the axial direction of the testing pile, and a flexible loader is arranged above the sand cushion layer. Multi-pile-foundation stress analysis can be carried out through variable parameters like frictional resistance coefficients between the pile and the soil in the situation of various pile-soil interface parameters. Advantages and characteristics of all pile types can be fully brought into play in the actual application according to testing results, foundation bearing force is remarkably improved, and foundation sedimentation is reduced.
Description
Technical field
The present invention relates to technical field of buildings, the particularly polynary pile foundation simulation chamber of one.
Background technology
Closely during the last ten years, foundation treatment technology obtains and develops on a large scale very much.Foundation treatment technology latest development is not only reflected in the aspects such as the development of machinery, material, design theory construction technology, Field Monitoring Technique and Novel foundation treatment method, and is reflected in the integrated application aspect of various method for processing foundation.The external marine agitation pile degree of depth has reached 70M under sea level, and land reinforcement depth also reaches 40M.And China dropped into the rear cement mixing method degree of depth of batch production generally at about 15M from 1984, and once have the viewpoint of " deep-mixed pile belongs to flexible pile; its useful effect stake is long can only reach 15M ", but have through the achievement in research that studies in China personnel are a large amount of the overlength agitation pile that successful development and application reaches 27M, and make Bearing Capacity of Composite Foundation reach more than 240KPa.Supporting capacity and the deformation characteristic of the stake (discrete material pile, flexible pile and rigid pile) of three types in composite foundation are different, and each method for processing foundation has its scope be suitable for and pluses and minuses.
Multi-element Composite Foundation is another new foundation treatment mode in foundation treatment technology, domestic theory in this respect and application study than abroad more have significant progress, although Chinese scholars has carried out many useful discussions to the theory of multi-element Composite Foundation and application, but at present no matter at design analysis in theory, or in engineer applied, all there is many problem and shortage, await improving further and development.Along with the accident in recent years about composite foundation is on the increase, the application of composite foundation is suffered to design, the query of owner and construction authorities is even forbidden, certainly be because construction quality problem causes mostly, but existing composite foundation treatment problem is also its one of the main reasons.Existing composite foundation treatment method main thought is comprehensive pile soil common action, use for reference more ripe pile foundation and natural ground Design Mode, the indoor intensity of test block of existing design Main Basis, does not consider the contradiction that the very high and on-the-spot pile strength of indoor intensity of test block is very low.And composite foundation kind gets more and more now, and each department Geological Differences is larger, the compound foundation pile soil bearing characters of different designs configuration is different with deformation rule, current research also can not provide in the face of different difference and take corresponding method for designing for design far away, be unanimously to, in the computational methods of the selection of method for designing, the value of design parameters and sedimentation and deformation, there is certain blindness, make the safety of engineering, economy and reasonability all receive impact.Therefore seriously the application of composite foundation in construction work ground foundation engineering is restricted.
Along with multi-element Composite Foundation application development in engineering, the research of multi-element Composite Foundation is also subject to day by day to the attention of scholar and engineers and technicians.Mainly concentrate in the calculating of bearing capacity and the research of settlement calculation method to the research of multi-element Composite Foundation at present, it is mainly studied and can be divided into theoretical research and experimental study two aspects.Although Chinese scholars has carried out many useful discussions in theory at multi-element Composite Foundation, and in conjunction with the engineering practice of China, propose some corresponding design and calculation methods.But, about indoor model test and the on-the-spot full scale test of multi-element Composite Foundation, so far there is not been reported, especially multi-element Composite Foundation king-pile, native load transfer law, the native bed course one cushion cap acting in conjunction mechanism of stake one and analytical method, pile-type and pile arrangement are on the impact etc. of multi-element Composite Foundation bearing characters and sedimentation, all await dark people research.
To sum up, carry out the test and application research of multi-element Composite Foundation, there are important theory significance, strong engineering background and good economic and social benefits.
Summary of the invention
The present invention is intended at least solve one of problems of the prior art.
An object of the present invention is to be tested by set multi-element Composite Foundation, obtains advantage and the feature of various pile-type, thus reaches the object improving bearing capacity of foundation soil, reduce foundation settlement in actual applications.
For achieving the above object, the invention provides a kind of polynary pile foundation simulation chamber, comprise casing, the test pile be arranged in casing, the test soil covering described test pile and the sand cushion that covers on described test soil, described bottom half is provided with dividing plate and is positioned at the base plate below described dividing plate, described dividing plate is provided with through hole, and described wall box and dividing plate are equipped with pressure sensor; Described test pile is arranged on described dividing plate by the through hole on described dividing plate, is connected with described base plate by support spring, and described test pile is provided with Fibre Optical Sensor in the axial direction; Flexible loader is provided with above described sand cushion.
Further, described test pile comprises discrete material pile, flexible pile and rigid pile.
Further, described flexible loader comprises loading air bag and the ventilating pipe being communicated with described loading air bag.
Further, described casing top is provided with cover plate, and described cover plate is provided with the through hole holding described ventilating pipe and pass through.
Further, described wall box is provided with the gutter being communicated with described box house, and the exit that described gutter is positioned at described box house is provided with screen pack.
Further, the wire for connecting described Fibre Optical Sensor is also comprised.
Further, described dividing plate and described base plate are bolted.
Further, described test pile is connected by the through hole of packing ring with described dividing plate.
Beneficial effect of the present invention there are provided a kind of polynary pile foundation simulation chamber, the present invention is by simulating discrete material pile, flexible pile and rigid pile integrated application are in reinforcing soft soil ground foundation simulation, thus multiple elements design ground foundation simulation in formation casing it is tested, the present invention can complete the polynary pile foundation force analysis in multiple stake Soil Interface parameter situation by parameters such as frictional resistance coefficients between change stake soil, advantage and the feature of respective pile-type is given full play in actual applications according to result of the test, thus increase substantially bearing capacity of foundation soil, reduce foundation settlement.
In description of the invention, term " installation " and " connection " etc. all should be interpreted broadly, and such as, " connection " can be fixedly connected with, and also can be removably connect, or connects integratedly; Can be direct connection, also can be indirectly connected by intermediary.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Although give some embodiments of the present invention, it will be understood by those of skill in the art that without departing from the spirit of the invention herein, can change embodiment herein.Above-described embodiment is exemplary, should using embodiment herein as the restriction of interest field of the present invention.
Accompanying drawing explanation
Figure 1 shows that the structural representation of a kind of polynary pile foundation simulation chamber of the embodiment of the present invention.
Detailed description of the invention
Hereafter will describe the present invention in detail in conjunction with specific embodiments.It should be noted that the combination of technical characteristic or the technical characteristic described in following embodiment should not be considered to isolated, they can mutually be combined thus be reached better technique effect.
Embodiment
Figure 1 shows that the structural representation of a kind of polynary pile foundation simulation chamber of the embodiment of the present invention.
The present embodiment provides a kind of polynary pile foundation simulation chamber, as shown in Figure 1, comprises casing 1, the test pile 2 be arranged in casing 1, the test soil 3 covering described test pile 2 and the sand pad 4 covered in described test native 3;
The base plate 12 being provided with dividing plate 11 bottom described casing 1 and being positioned at below described dividing plate 11, described dividing plate 11 is connected by bolt 13 with described base plate 12, and described dividing plate 11 is provided with through hole, and described casing 1 sidewall and dividing plate 11 are equipped with pressure sensor 5;
Described test pile 2 is arranged on described dividing plate 11 by the through hole on described dividing plate 11, described test pile 2 is connected with the through hole of described dividing plate 11 by packing ring 111, be connected with described base plate 12 by support spring 6, simulate by described support spring 6 position that described test pile 2 causes because of surface settlement to change, described test pile 2 is provided with Fibre Optical Sensor 21 in the axial direction, and the device that described Fibre Optical Sensor 21 gathers pressure signal by wire 22 and casing 1 outside is connected;
Be provided with flexible loader 7 above described sand cushion 4, described flexible loader 7 comprises loading air bag 71 and the ventilating pipe 72 being communicated with described loading air bag 71.
In the present embodiment, described test pile 2 has three, is respectively discrete material pile, flexible pile and rigid pile.
Described casing 1 top is provided with cover plate 14, and described cover plate 14 is connected with described casing 1 by bolt 15, and described cover plate 14 is provided with the through hole holding described ventilating pipe 72 and pass through.
Described casing 1 sidewall is provided with the gutter 16 being communicated with described casing 1 inside, and the exit that described gutter 16 is positioned at described casing 1 inside is provided with screen pack 17.
A kind of polynary pile foundation simulation chamber of the present invention, the present invention is by simulating discrete material pile, flexible pile and rigid pile integrated application in reinforcing soft soil ground foundation simulation, thus multiple elements design ground foundation simulation in formation casing it is tested, the present invention can complete the polynary pile foundation force analysis in multiple stake Soil Interface parameter situation by parameters such as frictional resistance coefficients between change stake soil, advantage and the feature of respective pile-type is given full play in actual applications according to result of the test, thus increase substantially bearing capacity of foundation soil, reduce foundation settlement.
Claims (8)
1. a polynary pile foundation simulation chamber, is characterized in that, comprises casing, the test pile be arranged in casing, the test soil covering described test pile and the sand cushion that covers on described test soil, it is characterized in that:
Described bottom half is provided with dividing plate and is positioned at the base plate below described dividing plate, and described dividing plate is provided with through hole, and described wall box and dividing plate are equipped with pressure sensor;
Described test pile is arranged on described dividing plate by the through hole on described dividing plate, is connected with described base plate by support spring, and described test pile is provided with Fibre Optical Sensor in the axial direction;
Flexible loader is provided with above described sand cushion.
2. polynary pile foundation simulation chamber according to claim 1, it is characterized in that, described test pile comprises discrete material pile, flexible pile and rigid pile.
3. polynary pile foundation simulation chamber according to claim 2, is characterized in that, described flexible loader comprises loading air bag and the ventilating pipe being communicated with described loading air bag.
4. polynary pile foundation simulation chamber according to claim 3, is characterized in that, described casing top is provided with cover plate, and described cover plate is provided with the through hole holding described ventilating pipe and pass through.
5. polynary pile foundation simulation chamber according to claim 4, is characterized in that, described wall box is provided with the gutter being communicated with described box house, and the exit that described gutter is positioned at described box house is provided with screen pack.
6. polynary pile foundation simulation chamber according to claim 5, is characterized in that, also comprises the wire for connecting described Fibre Optical Sensor.
7. polynary pile foundation simulation chamber according to claim 6, is characterized in that, described dividing plate and described base plate are bolted.
8. polynary pile foundation simulation chamber according to claim 7, is characterized in that, described test pile is connected by the through hole of packing ring with described dividing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510195704.3A CN104846853A (en) | 2015-04-22 | 2015-04-22 | Multi-pile-foundation simulation testing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510195704.3A CN104846853A (en) | 2015-04-22 | 2015-04-22 | Multi-pile-foundation simulation testing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104846853A true CN104846853A (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510195704.3A Pending CN104846853A (en) | 2015-04-22 | 2015-04-22 | Multi-pile-foundation simulation testing box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331742A (en) * | 2019-07-01 | 2019-10-15 | 浙江大学 | It is a kind of to test the quiet experimental rig and test method for boring and taking root in a pile-soil interface frictional behavior |
| CN113605470A (en) * | 2021-09-15 | 2021-11-05 | 湖北省交通规划设计院股份有限公司 | Test device and test method for simulating slope pile filling-pile foundation model |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4449048B2 (en) * | 1999-11-30 | 2010-04-14 | 三谷セキサン株式会社 | Underground structure measuring device |
| CN102607754A (en) * | 2012-03-16 | 2012-07-25 | 东南大学 | Device for measuring negative skin friction of pile soil |
| CN202522465U (en) * | 2012-03-07 | 2012-11-07 | 杭州科技职业技术学院 | Multielement pile foundation simulation test box |
| CN203238678U (en) * | 2013-03-22 | 2013-10-16 | 杭州科技职业技术学院 | Ultralong pile effective pile length simulation testing box |
| CN103835323A (en) * | 2014-03-21 | 2014-06-04 | 金陵科技学院 | Loading and measurement device for static-pressure pile model test |
-
2015
- 2015-04-22 CN CN201510195704.3A patent/CN104846853A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4449048B2 (en) * | 1999-11-30 | 2010-04-14 | 三谷セキサン株式会社 | Underground structure measuring device |
| CN202522465U (en) * | 2012-03-07 | 2012-11-07 | 杭州科技职业技术学院 | Multielement pile foundation simulation test box |
| CN102607754A (en) * | 2012-03-16 | 2012-07-25 | 东南大学 | Device for measuring negative skin friction of pile soil |
| CN203238678U (en) * | 2013-03-22 | 2013-10-16 | 杭州科技职业技术学院 | Ultralong pile effective pile length simulation testing box |
| CN103835323A (en) * | 2014-03-21 | 2014-06-04 | 金陵科技学院 | Loading and measurement device for static-pressure pile model test |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331742A (en) * | 2019-07-01 | 2019-10-15 | 浙江大学 | It is a kind of to test the quiet experimental rig and test method for boring and taking root in a pile-soil interface frictional behavior |
| CN110331742B (en) * | 2019-07-01 | 2023-11-07 | 浙江大学 | Test device and method for testing friction characteristics of pile soil contact surface of static drilling root planting pile |
| CN113605470A (en) * | 2021-09-15 | 2021-11-05 | 湖北省交通规划设计院股份有限公司 | Test device and test method for simulating slope pile filling-pile foundation model |
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Application publication date: 20150819 |