CN104132833A - Ultra-deep excavation centrifuge model test simulation apparatus and testing method thereof - Google Patents
Ultra-deep excavation centrifuge model test simulation apparatus and testing method thereof Download PDFInfo
- Publication number
- CN104132833A CN104132833A CN201410333582.5A CN201410333582A CN104132833A CN 104132833 A CN104132833 A CN 104132833A CN 201410333582 A CN201410333582 A CN 201410333582A CN 104132833 A CN104132833 A CN 104132833A
- Authority
- CN
- China
- Prior art keywords
- excavation
- model
- lift scheme
- model test
- guide pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to an ultra-deep excavation centrifuge model test simulation apparatus and a testing method thereof. The apparatus is composed of an excavation driving part and an excavation model part, and the structure of the excavation driving part is characterized in that a supporting plate is fixed to the top of a model box, and an elevating motor driven through a speed reducer by a large power single-phase motor and a linear bearing are fixed to the supporting plate; the structure of the excavation model part is characterized in that a guide rod traverses through the linear bearing and can freely vertically move in the linear bearing; the upper end of the guide rod is provided with a lifting beam; a load sensor is fixed to the lower surface of the lifting beam; and a lifting model is fixed to the lower end of the guide rod. The apparatus can normally run under the high gravitational field of a centrifuge, has the advantages of simulation of large excavation depth and excavation amount, excavation mode control and transformation convenience, benefiting for the arrangement of a geotechnical centrifuge model, very safe operation and precise control, and can simulate various types of excavation engineering (or filling engineering).
Description
Technical field
The present invention relates to a kind of utility appliance being applied on geotechnical centrifuge, be specifically related to a kind of equipment that can be used for simulating the centrifugal model test of super deep excavation operating mode, be specially adapted to carry out such as the super side of deep-cutting channel, deep basal pit etc. and dig dark larger engineering test simulation, the soil body resilience mechanism causing to study the off-load that causes because of the side of deep-cutting.This equipment oppositely loads by accessory drive, also goes for the centrifugal model test simulation of superelevation embankment engineering, the soil body compressive deformation mechanism causing to study the load that causes because of high embankment.
Background technology
Along with the develop rapidly of Chinese society's economy, Geotechnical Engineering has suffered from increasing technical barrier, and wherein super deep excavation project is more and more in recent years, in the Open Channel Construction of Route, just has and digs the super side of the deep-cutting channel that deeply reaches 49 m; In the construction in a lot of cities, also there is a large amount of deep foundation pit excavation projects, as the underground space of subway, high buildings and large mansions etc., often dig and deeply reach 20 ~ 40 m, even exceed 40 m[1].Super deep excavation project like this, has caused larger off-load for lower sleeping soil layer, will cause the resilience of lower sleeping soil layer.Excavation project is in the past dug deeply less, and the off-load amount causing is little, and the lower sleeping soil layer resilience of generation can be ignored; And for super deep excavation project, existing measured result shows, the protuberance distortion that excavation produces and the additional deformation of the supporting construction causing and surrounding soil thereof are comparatively remarkable, the resilience computing method that still not have at present preferably, extensively admitted, urgent need is carried out the off-load that the super deep excavation of experimental study causes and the soil body resilience mechanism causing.
In centrifugal model test, excavation simulation off-load mainly contains following methods at present:
(1) soil body that fluid-discharge therapy---the method is excavated by Fluid simulation is discharged liquid and has been realized excavate [2,3] of simulating the soil body in centrifugal force field.The density of liquid need to equal or try one's best to approach the density of excavating the soil body, the salt solusions such as normal employing zinc chloride, but these solution often have even toxicity of strong corrosivity, very dangerous, and easily corrode drain line and valve, in test, often occur situation out of control.Sometimes also adopt the excavation of dewaxing method simulation tunnel, but the constitutive relation of wax and native difference are very large, and fusing need to arrange heating resistor in wax stone, be difficult to fusing completely, even if wax fusing is also difficult for discharging.According to excavation pattern, wax stone can be made certain shape, and liquid needs to prepare the leather bag of corresponding pattern, but all cannot make the shape of the accurate excavation soil body; And the residual leather bag of fluid-discharge therapy, the residual heating resistor of dewaxing method, all undesirable.
(2) adopting hydro-extractor machine robot system---by robot system, can realize excavation in centrifugal force field in theory, fill, measurement etc. moved [4,5], is the method for excavation simulation in centrifugal model test of the best from principle.But because the accuracy requirement of robot system is high, the system deflection deformation producing under high gravity field is very large on the realization impact of exercises, does not often reach permissible accuracy; In addition the mechanical arm of robot system exert oneself less, can only be by a small amount of method excavation simulation repeatedly, the speed of excavation is very slow, and excavated volume is little, tests often endurable consuming time.
List of references:
[1] Zheng Gang, Jiao Ying. the design of deep foundation project theory and engineering application [M]. Beijing: China Construction Industry Press, 2010.
[2]?MARSHALL?A?M.?Tunnelling?in?sand?and?its?effect?on?pipelines?and?piles?[D].?London:?University?of?Cambridge,?2009.
[3] horse perilous peak, Chen Bin, field Xiao Fang etc. the centrifuge modelling research [J] of shield tunnel slip casting on existing tunnel impact. rock-soil mechanics. 2012,33 (12): 3604-3610.
[4] Wu Hongwei, Xu Guangming. the centrifugal model test research [J] of foundation stress solution division Rectification mechanism. Geotechnical Engineering journal. 2003,25 (3): 299-303.
[5] Ren Guofeng. the port basin Study on Similarity [D] based on hydro-extractor machine people. Nanjing, Nanjing Hydraulic Research Institute, 2012..
Summary of the invention
The object of this invention is to provide a kind of super deep excavation centrifugal model test analog machine, be intended to solve the high acceleration of gravity of hydro-extractor following key issue after the match: 1, cutting depth that prior art can be simulated is less, excavated volume little, excavation pattern control inconvenience; 2, prior art is unfavorable for the layout of geotechnological centrifugal model; 3, prior art is dangerous; 4, prior art is difficult to realize accurate control.The present invention also will provide the method for testing of this super deep excavation centrifugal model test analog machine.
The technical scheme that completes foregoing invention task is: a kind of super deep excavation centrifugal model test analog machine, and this equipment is made up of two parts; Excavation drive part and excavation model part, is characterized in that, the structure of described excavation drive part is that the top of model casing is fixed with back up pad, in this back up pad, is fixed with: the lifting motor being driven by high-power single-phase motor via reducer and linear bearing; The structure of described excavation model part is: described guide pole also can vertically move freely through linear bearing in linear bearing; Described guide pole upper end is provided with lifting crossbeam; Below this lifting crossbeam, be fixed with load transducer; Described guide pole lower end is fixed with lift scheme.
The prioritization scheme of above equipment has:
Described lift scheme is provided with various shape and specification; The soil body that needs in every kind of shape and specification and experiment to excavate adopts and meets that to excavate the lift scheme of shape corresponding.The soil body that needs in each experiment to excavate adopts and meets the lift scheme that excavates shape and substitute.
Described various shape and specification, Fig. 3 has listed the pattern of some lift schemes, Ke Yishi: channel excavation model, excavation of foundation pit model or road slope excavation model.
Lift scheme can be considered a container simultaneously, by increase and decrease the counterweight such as iron sand, counterweight in lift scheme, can adjust the quality of lift scheme, thus the excavated volume that simulation needs.
This lift scheme adopts and is threaded with guide pole lower end, can need to change difform lift scheme according to different tests.
Linear bearing is middle perforate.
Guide pole upper end fixes by set nut with lifting crossbeam.
The technical scheme that completes second invention task of the application is: use the method for testing of above-mentioned super deep excavation centrifugal model test analog machine, it is characterized in that, step is as follows,
(1). first determine excavation shape and the excavation quality that need to excavate the soil body;
(2). the lift scheme that meets above-mentioned soil excavation shape is installed and is fixed to guide pole lower end;
(3). in this lift scheme, increase and decrease the counterweight such as iron sand, counterweight, to adjust the quality of lift scheme, thus the excavation quality that simulation needs;
(4). above equipment is placed under the high gravity field of hydro-extractor;
(5). switch on power, start high-power single-phase motor, drive lifting motor by reductor;
(6). lifting motor is the lifting crossbeam of jack-up upwards;
(7). while promoting crossbeam by jack-up, will drive lift scheme together by jack-up by guide pole, leave the soil body;
(8). while completing above-mentioned steps, the load transducer promoting below crossbeam outputs test data;
(9). record above-mentioned load transducer and output test data, and to this data analysis, completed excavation unloading model.
In the prioritization scheme of said method, increasing or replacing has following steps:
(10). by controlling the lift scheme (now using as filling model) of direct current generator reversion, configuration respective shapes and quality, can realize the high embankment reclamation work centrifugal model test simulation of different types.
(9) (10) above step can carry out in step later, can be also step replacement step (that is, do not do step (9), directly carry out step (10)) (9).
In other words, this invention is to be achieved (referring to Fig. 1) by following gordian technique:
1, this equipment is made up of 2 parts: excavation drive part and excavation model part.
2, excavation drive part comprises reductor 9, the monophase machine 10 in lifting motor 5, linear bearing 6, back up pad 7 and the Fig. 2 in accompanying drawing 1.Wherein, other each parts are all fixedly mounted in back up pad 7, and back up pad 7 is fixed on model casing 11 tops in Fig. 2.As shown in Figure 1, 2, monophase machine is connected with reductor, then is connected with lifting motor, and linear bearing is middle perforate.
3, excavation model part comprises set nut 1, lifting crossbeam 2, load transducer 3, guide pole 4, the lift scheme 8 in accompanying drawing 1.Wherein, lift scheme 8 is connected with guide pole 4 lower ends, and guide pole 4 is through the perforate on the linear bearing 6 in excavation drive part, and guide pole 4 upper ends fix by set nut 1 with promoting crossbeam 2, promote crossbeam 2 below fixed load sensors 3.
4, when test, under the high gravity field of hydro-extractor, switch on power, start high-power single-phase motor 10, drive lifting motor 5 by reductor 9, upwards the lifting crossbeam 2 of the subsidiary load transducer 3 of jack-up, while promoting crossbeam by jack-up, will drive lift scheme 8 together by jack-up by guide pole 4, leave the soil body, completed excavation unloading model.
5, the soil body that need to excavate adopts and meets the lift scheme that excavate shape and substitute, and lift scheme is threaded with the employing of guide pole lower end, can need to change difform lift scheme according to different tests; Lift scheme can be considered a container simultaneously, by increase and decrease the counterweight such as iron sand, counterweight in lift scheme, can adjust the quality of lift scheme, thereby the excavated volume that simulation needs, accompanying drawing 3 has been listed the pattern of some lift schemes, according to concrete engineering research needs, also may there is the lift scheme of other patterns.
6, by controlling the lift scheme (now using as filling model) of direct current generator reversion, configuration respective shapes and quality, also can realize the high embankment reclamation work centrifugal model test simulation of different types.
Apparatus and method for of the present invention has following characteristics:
1, can normally operation under the high gravity field of hydro-extractor.The cutting depth that the present invention can simulate and excavated volume are all larger; The control of excavation pattern is all very convenient with conversion; Apparatus and method for of the present invention is conducive to the layout of geotechnological centrifugal model; Operation of the present invention is fool proof; And can realize accurate control.
2, adopt high power DC electric machine to drive, realize feed pull maximum 250kN; Be equipped with the die for special purpose molding box of long 1100 mm, wide 200 mm, off-load amount approximately 1136 kPa that can simulate, are equivalent to the super deep excavation amount of the approximately 60 m degree of depth; Reverse motors can realize the superelevation amount of filling of the most about 60 m.
3, by changing the lift scheme (or as filling model) of difformity and quality, can simulate the excavation project (or reclamation work) of multiple pattern.
The cutting depth that the present invention can simulate and excavated volume are all larger; The control of excavation pattern is convenient; Be conducive to the layout of geotechnological centrifugal model; Operation of the present invention is fool proof; The present invention can realize accurate control.
Brief description of the drawings
Fig. 1 is the front elevation of equipment structure chart;
Fig. 2 is the vertical view of equipment structure chart;
Fig. 3 is several patterns of lift scheme: wherein a is channel excavation model, and b is excavation of foundation pit model, and c is road slope excavation model.
Embodiment
Embodiment 1---channel excavation centrifugal model test research.
Refer to shown in Fig. 1,2, this equipment is made up of 2 parts: excavation drive part and excavation model part.Excavation drive part comprises reductor 9, the monophase machine 10 in lifting motor 5, linear bearing 6, back up pad 7 and Fig. 2.Other each parts are all fixedly mounted in back up pad 7, and back up pad 7 is fixed on model casing 11 tops in Fig. 2.Monophase machine is connected with reductor, then is connected with lifting motor, and linear bearing is middle perforate.Excavation model part comprises set nut 1, promotes crossbeam 2, load transducer 3, guide pole 4, lift scheme 8.Wherein, lift scheme 8 is connected with guide pole 4 lower ends, and guide pole 4 is through the perforate on the linear bearing 6 in excavation drive part, and guide pole 4 upper ends fix by set nut 1 with promoting crossbeam 2, promote crossbeam 2 below fixed load sensors 3.
When test, under the high gravity field of hydro-extractor, switch on power, start high-power single-phase motor 10, drive lifting motor 5 by reductor 9, upwards the lifting crossbeam 2 of the subsidiary load transducer 3 of jack-up, while promoting crossbeam by jack-up, to drive lift scheme 8 together by jack-up by guide pole 4, leave the soil body, complete excavation unloading model.
Lift scheme in figure is the part of excavating more than channel excavated section.Test is arranged as: (1) prepares model channel; (2) lift scheme (the excavation simulation part soil body) is placed on channel, regulates the quality of lift scheme to equal to excavate the soil body quality of off-load; (3) model and this equipment are placed in to hydro-extractor, rising centrifugal acceleration, applies super gravity field; (4) start this equipment, monophase machine drives lifting motor, lifting motor to touch by reductor and is provided with after the lifting crossbeam of load transducer, jack-up crossbeam, by guide pole and linear bearing jack-up lift scheme, lift scheme disengaging model channel has simulated the excavation off-load of channel; (5) record and analyze channel lifting deformation mechanism by other utility appliance.
Embodiment 2, substantially the same manner as Example 1, but by controlling direct current generator reversion, realize the high embankment reclamation work simulation of different types.
Claims (9)
1. a super deep excavation centrifugal model test analog machine, this equipment is made up of two parts; Excavation drive part and excavation model part, is characterized in that, the structure of described excavation drive part is that the top of model casing is fixed with back up pad, in this back up pad, is fixed with: the lifting motor being driven by high-power single-phase motor via reducer and linear bearing; The structure of described excavation model part is: described guide pole also can vertically move freely through linear bearing in linear bearing; Described guide pole upper end is provided with lifting crossbeam; Below this lifting crossbeam, be fixed with load transducer; Described guide pole lower end is fixed with lift scheme.
2. super deep excavation centrifugal model test analog machine according to claim 1, is characterized in that, described lift scheme is provided with various shape and specification; The soil body that needs in every kind of shape and specification and experiment to excavate adopts and meets that to excavate the lift scheme of shape corresponding.
3. super deep excavation centrifugal model test analog machine according to claim 2, is characterized in that, the lift scheme of described various shape and specification refers to: channel excavation model, excavation of foundation pit model or road slope excavation model.
4. super deep excavation centrifugal model test analog machine according to claim 1, is characterized in that, described lift scheme is designed to a container, in this lift scheme container, can increase and decrease counterweight.
5. super deep excavation centrifugal model test analog machine according to claim 1, is characterized in that, described lift scheme adopts and is threaded with guide pole lower end.
6. super deep excavation centrifugal model test analog machine according to claim 1, is characterized in that, perforate in the middle of described linear bearing.
7. according to the super deep excavation centrifugal model test analog machine one of claim 1-6 Suo Shu, it is characterized in that, described guide pole upper end fixes by set nut with lifting crossbeam.
8. right to use requires the method for testing of the super deep excavation centrifugal model test analog machine described in 1, it is characterized in that, step is as follows,
(1). first determine excavation shape and the excavation quality that need to excavate the soil body;
(2). the lift scheme that meets above-mentioned soil excavation shape is installed and is fixed to guide pole lower end;
(3). in this lift scheme, increase and decrease the counterweight such as iron sand, counterweight, to adjust the quality of lift scheme, thus the excavation quality that simulation needs;
(4). above equipment is placed under the high gravity field of hydro-extractor;
(5). switch on power, start high-power single-phase motor, drive lifting motor by reductor;
(6). lifting motor is the lifting crossbeam of jack-up upwards;
(7). while promoting crossbeam by jack-up, will drive lift scheme together by jack-up by guide pole, leave the soil body;
(8). while completing above-mentioned steps, the load transducer promoting below crossbeam outputs test data;
(9). record above-mentioned load transducer and output test data, and to this data analysis, complete excavation unloading model.
9. the method for testing of super deep excavation centrifugal model test analog machine according to claim 8, is characterized in that, increasing or replacing has following steps:
(10). by controlling the lift scheme of direct current generator reversion, configuration respective shapes and quality, realize the high embankment reclamation work centrifugal model test simulation of different types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333582.5A CN104132833B (en) | 2014-04-30 | 2014-07-14 | Ultra-deep excavation centrifuge model test simulation apparatus and testing method thereof |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014101819157 | 2014-04-30 | ||
| CN201410181915.7 | 2014-04-30 | ||
| CN201410181915 | 2014-04-30 | ||
| CN201410333582.5A CN104132833B (en) | 2014-04-30 | 2014-07-14 | Ultra-deep excavation centrifuge model test simulation apparatus and testing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104132833A true CN104132833A (en) | 2014-11-05 |
| CN104132833B CN104132833B (en) | 2017-02-22 |
Family
ID=51805599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410333582.5A Active CN104132833B (en) | 2014-04-30 | 2014-07-14 | Ultra-deep excavation centrifuge model test simulation apparatus and testing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104132833B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104674856A (en) * | 2015-02-04 | 2015-06-03 | 山东大学 | Foundation pit excavation simulation device under supergravity condition |
| CN105372409A (en) * | 2015-12-07 | 2016-03-02 | 太原理工大学 | Excavation apparatus for analog simulation test |
| CN109166441A (en) * | 2018-11-08 | 2019-01-08 | 南京大学 | For the diapir physical simulation experiment device and experimental method under Elevated Gravity |
| CN109356209A (en) * | 2018-12-12 | 2019-02-19 | 交通运输部天津水运工程科学研究所 | Rolled plate Base Pit Excavation Simulation device under a kind of Elevated Gravity |
| CN109682672A (en) * | 2019-01-22 | 2019-04-26 | 成都理工大学 | A kind of system and method that simulation deep layer Toppling Deformation is developed and caused disaster |
| CN110275008A (en) * | 2019-06-11 | 2019-09-24 | 同济大学 | A kind of contactless tunnel excavation physical model and test method of analog rainfall |
| CN110487989A (en) * | 2019-09-06 | 2019-11-22 | 长江水利委员会长江科学院 | One kind getting over river subway tunnel dynamic characteristics centrifugal model test device and its test method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080062666A (en) * | 2006-12-29 | 2008-07-03 | 대한민국(관리부서:농촌진흥청) | Digital soil strength measuring device |
| CN101787714A (en) * | 2010-02-05 | 2010-07-28 | 同济大学 | System for automatically adding supports in micro foundation pits in eccentric field |
| CN103398902A (en) * | 2013-08-01 | 2013-11-20 | 山东大学 | Test apparatus for flexible loading and instantaneously unloading of high geostress, and test method |
-
2014
- 2014-07-14 CN CN201410333582.5A patent/CN104132833B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080062666A (en) * | 2006-12-29 | 2008-07-03 | 대한민국(관리부서:농촌진흥청) | Digital soil strength measuring device |
| CN101787714A (en) * | 2010-02-05 | 2010-07-28 | 同济大学 | System for automatically adding supports in micro foundation pits in eccentric field |
| CN103398902A (en) * | 2013-08-01 | 2013-11-20 | 山东大学 | Test apparatus for flexible loading and instantaneously unloading of high geostress, and test method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104674856A (en) * | 2015-02-04 | 2015-06-03 | 山东大学 | Foundation pit excavation simulation device under supergravity condition |
| CN104674856B (en) * | 2015-02-04 | 2016-06-01 | 山东大学 | Base Pit Excavation Simulation device when hypergravity |
| CN105372409A (en) * | 2015-12-07 | 2016-03-02 | 太原理工大学 | Excavation apparatus for analog simulation test |
| CN105372409B (en) * | 2015-12-07 | 2017-03-22 | 太原理工大学 | Excavation apparatus for analog simulation test |
| CN109166441A (en) * | 2018-11-08 | 2019-01-08 | 南京大学 | For the diapir physical simulation experiment device and experimental method under Elevated Gravity |
| CN109356209A (en) * | 2018-12-12 | 2019-02-19 | 交通运输部天津水运工程科学研究所 | Rolled plate Base Pit Excavation Simulation device under a kind of Elevated Gravity |
| CN109356209B (en) * | 2018-12-12 | 2023-09-22 | 交通运输部天津水运工程科学研究所 | Coiled plate type foundation pit excavation simulation device under hypergravity environment |
| CN109682672A (en) * | 2019-01-22 | 2019-04-26 | 成都理工大学 | A kind of system and method that simulation deep layer Toppling Deformation is developed and caused disaster |
| CN110275008A (en) * | 2019-06-11 | 2019-09-24 | 同济大学 | A kind of contactless tunnel excavation physical model and test method of analog rainfall |
| CN110487989A (en) * | 2019-09-06 | 2019-11-22 | 长江水利委员会长江科学院 | One kind getting over river subway tunnel dynamic characteristics centrifugal model test device and its test method |
| CN110487989B (en) * | 2019-09-06 | 2024-03-26 | 长江水利委员会长江科学院 | River-crossing subway tunnel dynamic characteristic centrifugal model test device and test method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104132833B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104132833A (en) | Ultra-deep excavation centrifuge model test simulation apparatus and testing method thereof | |
| Barari et al. | Undrained response of bucket foundations to moment loading | |
| CN104007246B (en) | The controlled sliding surface slope stability similar test system of three-dimensional coupling | |
| CN201307365Y (en) | Simulating shield machine for tunnel boring test | |
| CN101906788B (en) | Device for simulating centrifugal field slope excavating condition | |
| CN103226068B (en) | Mechanical rock breaking test platform confining pressure device | |
| CN102914475B (en) | Shear test device for observing mechanical property of interface between underwater soil and structure | |
| CN207032342U (en) | A kind of geological exploration soil earthing compacting equipment | |
| CN108914982A (en) | High-speed rail pile Reinforced subgrade long-term settlement model test apparatus under mobile cyclic load | |
| CN106950070A (en) | Experimental rig for rectangular top pipe jacking construction Whole Process Simulation | |
| CN203066126U (en) | Test device for simulating vertical tension-compression load effect on pile foundations | |
| CN105606461A (en) | Liftable loading mechanism and shear-seepage coupling testing device applying same | |
| CN104749054A (en) | Three-dimensional controllable dynamic compaction simulated centrifuge testing mechanical arm device | |
| CN105651671A (en) | Shear-seepage coupling testing device for two-dimensional rock sample | |
| CN103061774A (en) | Shield tunnel construction environment simulation unit | |
| CN210127851U (en) | Simulation test device for simulating excavation construction of multiple shield tunnels | |
| CN110245426B (en) | Finite element refined simulation method for pipe gallery structure pipe jacking construction | |
| CN202305378U (en) | Bottom friction simulation experimental platform for realizing stepless speed change | |
| CN203250466U (en) | Self-elevation type sea drilling platform model | |
| CN109695262A (en) | A kind of prominent heavy experimental rig of simulation open caisson generation founding | |
| CN205643289U (en) | Synchronous slip casting analogue test system of shield tunnel | |
| CN103035163B (en) | Supporting and reverse propelling device of shield testing machine | |
| CN203977470U (en) | A kind of sand amount sand planar survey system of sand pile machine | |
| CN1173163C (en) | Discrete multiple main stress plane loading method and mechanism for model experiment | |
| CN202903619U (en) | Shear test device for observing mechanical property of underwater soil and structural interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |