CN104674856B - Base Pit Excavation Simulation device when hypergravity - Google Patents
Base Pit Excavation Simulation device when hypergravity Download PDFInfo
- Publication number
- CN104674856B CN104674856B CN201510059057.3A CN201510059057A CN104674856B CN 104674856 B CN104674856 B CN 104674856B CN 201510059057 A CN201510059057 A CN 201510059057A CN 104674856 B CN104674856 B CN 104674856B
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- girder
- secondary beam
- screw rod
- beam guide
- hypergravity
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 43
- 238000004088 simulation Methods 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 15
- 239000000725 suspension Substances 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- E02D17/02—Foundation pits
Landscapes
- 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)
- Earth Drilling (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Base Pit Excavation Simulation device when the present invention discloses a kind of hypergravity. mold box is arranged in rigid support, rigidity props up layout camera and two girders, girder has main beam guide track, wherein an erection of main beam has the girder screw rod parallel with main beam guide track, girder screw rod is connected with girder motor, two one-level secondary beams be arranged vertically on two main beam guide tracks and form slide secondary, secondary beam guide rail is had above secondary beam, the girder side nut being contained in girder screw rod is connected with wherein one-level secondary beam, wherein an one-level secondary beam is provided with the secondary beam screw rod with secondary beam guide rail parallel, secondary beam screw rod is connected with secondary beam motor, two two grades of secondary beams be arranged vertically on two secondary beam guide rails and form slide secondary, electric block is installed in the electric block support above two two grades of secondary beams. the present invention is applicable to the excavation of foundation pit of base pit engineering hypergravity model trial under non-stopped status, ensure that soil body wall pressure suffered by hole subsoil body stress and supporting construction is consistent with reality.
Description
Technical field
The present invention relates to a kind of Base Pit Excavation Simulation device, Base Pit Excavation Simulation device when particularly relating to a kind of hypergravity.
Background technology
Geotechnique's hypergravity model trial has its unique advantage relative to prototype observation, the test of indoor normal gravity field and method for numerical simulation, because of but carry out test method most advanced, the most effective in geotechnical engineering technical study at present. Along with the maximization, complicated of underground works, the way in the past relying on engineering experience can not meet design, construction requirement, carries out base pit engineering centrifugal model test and can effectively study base pit engineering problem, promotes theoretical perfect with numerical simulation of base pit engineering. Owing to base pit engineering operating mode is complicated, simulation difficulty, especially Base Pit Excavation Simulation, to the quality of actual condition simulation, will directly affect the result of test.
In existing hypergravity model trial, excavation of foundation pit mode can be concluded as following several substantially:
(1) shut down excavation method, under stopped status, namely complete excavation, rear increase the reaction that centrifugal acceleration studies the soil body or soil-baffling structure in stress raising situation. But shutting down starts shooting again the process unloading and reloading to foundation soil, and different from actual condition, resistance to shear of soil path changes, and the impact of model trial result is very important.
(2) discharge generation soil liquid excavation method, namely progressively discharge under whizzer running condition and carry out Simulation of Excavation Process for soil liquid, it is generally adopt the heavy-fluid suitable with soil body severe to replace the soil body of excavation of foundation pit part under normal gravity condition, it is supplied to hole subsoil body vertical force and supporting construction side force, but due to each equal to pressure in liquid same depth, the method can not the wall pressure of the accurate simulation soil body.
(3) microrobot excavation method, namely adopts advanced miniature automatic excavating device to carry out excavation of foundation pit under whizzer running condition. Though the method is optimal Excavation simulation method, but cost of development height, and technical difficulty is big.
Summary of the invention
Base Pit Excavation Simulation device when it is an object of the invention to provide a kind of hypergravity, is particularly useful for hypergravity model trial under non-stopped status, the device of simulation base hole fractional layer excavation.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The present invention comprises mold box, mold box is arranged in rigid support, rigid support upper surface arranges monitoring device, rigid support upper surface is provided with parallel two piece girder, each own main beam guide track above two girders, wherein a girder side is provided with the girder screw rod parallel with main beam guide track, one end of girder screw rod is connected with the girder motor being arranged on wherein girder one end, the other end of girder screw rod is rotationally connected with the girder end plate bearing hole being arranged on the same girder the other end, two one-level secondary beams are arranged vertically on two main beam guide tracks, and form, with two main beam guide tracks, pair of sliding, each own secondary beam guide rail above two one-level secondary beams, the girder side nut being contained in girder screw rod is connected with wherein one-level secondary beam, wherein an one-level secondary beam side is provided with the secondary beam screw rod with secondary beam guide rail parallel, one end of secondary beam screw rod is connected with the secondary beam motor being arranged on wherein one-level secondary beam one end, the other end of secondary beam screw rod and the secondary beam end plate bearing hole of the same one-level secondary beam the other end are rotationally connected, two two grades of secondary beams are arranged vertically on two secondary beam guide rails, and form, with two secondary beam guide rails, pair of sliding, above two two grades of secondary beams, electric block support is housed, electric block is arranged in electric block support.
Described mold box, comprises model storehouse and spoir storehouse, and the soil body is filled in model storehouse, and soil body insertion building enclosure, is divided into model storehouse two parts, is excavation of foundation pit part near spoir storehouse one upper lateral part, and excavation of foundation pit part places several spoil bags.
Described building enclosure is isolation plate or isolation pile.
Described several spoil bag tops are equipped with spring ring, and spring ring can be sling by the suspension hook of electric block.
Described monitoring device is camera, for monitoring the suspension hook position with auxiliary adjustment electric block.
Described spring ring is upspring voluntarily after upper strata spoil bag recalls.
Described two one-level secondary beams form slip pair by the first slide block and two main beam guide tracks, and two two grades of secondary beams form, by the 2nd slide block and two secondary beam guide rails, pair of sliding, and make the motion that the suspension hook of electric block realizes in horizontal direction.
Described first slide block is connected with girder screw rod by girder side nut, and described 2nd slide block is connected with secondary beam screw rod by secondary beam side nut.
The size of described spoil bag coordinates with excavation layer, and material is canvas.
Described excavation of foundation pit part is provided with force transducer and displacement sensor, for measuring corresponding internal force size and the deformation size that the soil body generates owing to building enclosure produces internal forces distribution in Excavation Process thereupon.
The useful effect that the present invention has is:
(1) the present invention is applicable to the excavation of foundation pit of base pit engineering hypergravity model trial under non-stopped status.
(2) can ensure that soil body wall pressure suffered by hole subsoil body stress and supporting construction is consistent with reality simultaneously.
(3) base hole fractional layer excavation is simulated, consistent with practice of construction operating mode, meet the change of soil body actual stress.
(4) whole principle of device is simple, and configuration is clear, is easy to install, and cost is low.
Accompanying drawing explanation
Fig. 1 is the vertical view of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
In figure: 1, mold box; 2, rigid support; 3, camera; 4, girder; 5, main beam guide track; 6, the first slide block; 7, one-level secondary beam; 8, secondary beam guide rail; 9, the 2nd slide block; 10, two grades of secondary beams; 11, electric block support; 12, electric block; 13, girder motor; 14, girder screw rod; 15, girder side nut; 16, secondary beam motor; 17, secondary beam screw rod; 18, secondary beam side nut; 19, girder end plate; 20, secondary beam end plate; 21, model storehouse; 22, spoir storehouse; 23, building enclosure; 24, spoil bag; 25, spring ring; 26, suspension hook; 27, interior corner bolt.
Embodiment
Specific embodiment of the invention scheme is set forth further below in conjunction with accompanying drawing.
As shown in Figure 1, Figure 2, Figure 3 shows, being arranged in rigid support 2 by mold box 1, rigid support 2 upper surface arranges camera 3, for monitoring suspension hook 26 position with auxiliary adjustment electric block 12, rigid support 2 upper surface is provided with parallel two piece girder 4, two girders 4 above separately within corner bolt 27 fix main beam guide track 5, wherein girder 4 side is provided with the girder screw rod 14 parallel with main beam guide track 5, one end of girder screw rod 14 is connected with the girder motor 13 being arranged on wherein girder 4 one end, the other end of girder screw rod 14 is rotationally connected with the girder end plate 19 bearing hole being arranged on same girder 4 the other end, two one-level secondary beams 7 are arranged vertically on two main beam guide tracks 5, and form, by the first slide block 6 and two main beam guide tracks 5, pair of sliding, two one-level secondary beams 7 above separately within corner bolt 27 fix secondary beam guide rail 8, the girder side nut 15 being contained in girder screw rod 14 is connected with wherein one-level secondary beam 7, wherein one-level secondary beam 7 side is provided with the secondary beam screw rod 17 parallel with secondary beam guide rail 8, one end of secondary beam screw rod 17 is connected with the secondary beam motor 16 being arranged on wherein one-level secondary beam 7 one end, the other end of secondary beam screw rod 17 and the secondary beam end plate 20 bearing hole of same one-level secondary beam 7 the other end are rotationally connected, two two grades of secondary beams 10 are arranged vertically on two secondary beam guide rails 8, and form, by the 2nd slide block 9 and two secondary beam guide rails 8, pair of sliding, two two grades of secondary beams 10 are equipped with electric block support 11 above, electric block 12 is arranged in electric block support 11.
As shown in Figure 2, mold box 1 is divided into model storehouse 21 and spoir storehouse 22, and the soil body is filled in model storehouse 21, and soil body insertion building enclosure 23, is divided into model storehouse 21 two parts, is excavation of foundation pit part near side, spoir storehouse. The excavation of foundation pit part soil body is replaced with several layers of spoil bag 24 in patternmaking process, and every layer of native bag is equipped with spring ring 25, can upspring voluntarily after upper strata spoil bag 24 hangs out, and therefore electric block suspension hook 26 can trigger spring ring 25 smoothly, hangs out spoil bag 24. The making method of described spoil bag 24 is first according to excavation layer size design soil bag, selects canvas to be making material, by sewing, adopts afterwards and prepares identical method preparation replacement soil layer block with ground.
Described building enclosure 23 is isolation plate or isolation pile.
Described several spoil bag 24 tops are equipped with spring ring 25, and spring ring 25 can be sling by the suspension hook 26 of electric block 12.
The principle of work of the present invention is as follows:
This device is arranged in centrifugal basket, open the girder motor 13 of girder 4 and the secondary beam motor 16 of one-level secondary beam 7 respectively, girder screw rod 14 and secondary beam screw rod 17 rotate, girder side nut 15 and secondary beam side nut 18 is caused to advance or retreat, and drive the first coupled slide block 6 and the 2nd slide block 9 to-and-fro movement, thus the suspension hook 26 realizing electric block 12 motion in the horizontal direction, monitor suspension hook 26 position with camera 3, above the corresponding spring ring 25 of spoil bag 24 simultaneously; Closing girder motor 13 and secondary beam motor 16, open electric block 12 switch, adjusting lift hook 26 moves up and down, certain altitude above lifting spoil bag 24 to model storehouse 21; Closing electric block 12 switch, open girder motor 13 and secondary beam motor 16 respectively, the spoil bag 24 of lifting just moves to above spoir storehouse 22 with suspension hook 26; Close girder motor 13 and secondary beam motor 16, open electric block 12 switch, suspension hook 26 moves downward, and is positioned in spoir storehouse 22 by spoil bag 24, and suspension hook 26 again rises and rises to above spoir storehouse 22, corresponding soil layer has excavated, the same step of the excavation of other soil layer carries out, until excavation of foundation pit completes, in Excavation Process, building enclosure 23 will produce internal forces distribution, foundation soil body is out of shape thereupon, measures relevant internal forces distribution by force transducer with displacement sensor.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of the technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (8)
1. Base Pit Excavation Simulation device when a hypergravity, it is characterized in that: comprise mold box (1), and mold box (1) is arranged in rigid support (2), rigid support (2) upper surface arranges monitoring device, rigid support (2) upper surface is provided with parallel two piece girder (4), two girder (4) each own main beam guide tracks (5) above, wherein girder (4) side is provided with the girder screw rod (14) parallel with main beam guide track (5), one end of girder screw rod (14) is connected with the girder motor (13) being arranged on this girder (4) one end, the other end of girder screw rod (14) is rotationally connected with girder end plate (19) the bearing hole being arranged on this girder (4) the other end, two one-level secondary beams (7) are arranged vertically on two main beam guide tracks (5), and form, with two main beam guide tracks (5), pair of sliding, two one-level secondary beam (7) each own secondary beam guide rails (8) above, girder side nut (15) being arranged in girder screw rod (14) is connected with wherein one-level secondary beam (7), another root one-level secondary beam (7) side is provided with the secondary beam screw rod (17) parallel with secondary beam guide rail (8), one end of secondary beam screw rod (17) is connected with the secondary beam motor (16) being arranged on this one-level secondary beam (7) one end, the other end of secondary beam screw rod (17) and secondary beam end plate (20) the bearing hole of this one-level secondary beam (7) the other end are rotationally connected, two two grades secondary beams (10) are arranged vertically on two secondary beam guide rails (8), and form, with two secondary beam guide rails (8), pair of sliding, two two grades secondary beams (10) are equipped with electric block support (11) above, electric block (12) is arranged in electric block support (11),
Described mold box (1) comprises model storehouse (21) and spoir storehouse (22), the soil body is filled in model storehouse (21), in building enclosure (23) the insertion soil body, model storehouse (21) are divided into two parts, close spoir storehouse one upper lateral part is excavation of foundation pit part, and excavation of foundation pit part places several spoil bags (24);
The size of described spoil bag (24) coordinates with excavation layer.
2. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 1, it is characterised in that: described building enclosure (23) is isolation plate or isolation pile.
3. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 1, it is characterized in that: described several spoil bag (24) tops are equipped with spring ring (25), and spring ring (25) can be sling by the suspension hook (26) of electric block (12).
4. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 1, it is characterised in that: described monitoring device is camera, for suspension hook (26) position of monitoring and auxiliary adjustment electric block (12).
5. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 3, it is characterised in that: described spring ring (25) is upspring voluntarily after upper strata spoil bag (24) hangs out.
6. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 1, it is characterized in that: described two one-level secondary beams (7) form, by the first slide block (6) and two main beam guide tracks (5), pair of sliding, two two grades secondary beams (10) form, by the 2nd slide block (9) and two secondary beam guide rails (8), pair of sliding, and make the motion that the suspension hook (26) of electric block (12) realizes in horizontal direction.
7. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 6, it is characterized in that: described first slide block (6) is connected with girder screw rod (14) by girder side nut (15), described 2nd slide block (9) is connected with secondary beam screw rod (17) by secondary beam side nut (18).
8. Base Pit Excavation Simulation device when a kind of hypergravity according to claim 1, it is characterized in that: the described soil body is provided with force transducer and displacement sensor, for measuring corresponding internal force size and the deformation size that the soil body produces internal forces distribution and generate due to building enclosure (23) in Excavation Process thereupon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059057.3A CN104674856B (en) | 2015-02-04 | 2015-02-04 | Base Pit Excavation Simulation device when hypergravity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510059057.3A CN104674856B (en) | 2015-02-04 | 2015-02-04 | Base Pit Excavation Simulation device when hypergravity |
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| CN104674856A CN104674856A (en) | 2015-06-03 |
| CN104674856B true CN104674856B (en) | 2016-06-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926686A (en) * | 2016-04-30 | 2016-09-07 | 山东大学 | Centrifugal model testing system and method studying common character of composite foundation and support structure |
| CN105756106A (en) * | 2016-04-30 | 2016-07-13 | 山东大学 | Centrifugal experiment model test system for simulating vertical load transmission mechanism of composite foundation |
| CN105756107A (en) * | 2016-04-30 | 2016-07-13 | 山东大学 | Centrifugal test model for verifying combined action of supporting structure and soil body and manufacturing method of centrifugal test model |
| CN105735381A (en) * | 2016-04-30 | 2016-07-06 | 山东大学 | Centrifugal model test system with composite foundation and supporting structure having common characters |
| CN105926688A (en) * | 2016-04-30 | 2016-09-07 | 山东大学 | Centrifugal model testing device provided with composite foundation and support structure with common shape and property and manufacturing method of centrifugal model testing device |
| CN109580368A (en) * | 2018-11-19 | 2019-04-05 | 同济大学 | Excavation Deformation of Deep Foundation Pits character centrifugal model test device in a kind of multilayer artesian water stratified formations |
| CN109958147B (en) * | 2019-03-26 | 2020-06-19 | 浙江大学 | Supergravity model test device and method for simulating influence of asymmetrically excavated foundation pit on lower horizontal tunnel |
| CN111206627B (en) * | 2020-03-02 | 2024-03-08 | 浙江大学城市学院 | Centrifugal model test device and method for influencing existing pile foundation by tunnel-foundation pit multiple excavation |
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| CN204590103U (en) * | 2015-02-04 | 2015-08-26 | 山东大学 | Base Pit Excavation Simulation device under hypergravity condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101462566B1 (en) * | 2013-03-29 | 2014-11-19 | 한국건설기술연구원 | Apparatus and Method for Measuring Horizontal Resistance of Pile |
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2015
- 2015-02-04 CN CN201510059057.3A patent/CN104674856B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| CN101526440A (en) * | 2009-04-13 | 2009-09-09 | 清华大学 | Centrifugal model retaining wall test device |
| CN101906788A (en) * | 2010-08-20 | 2010-12-08 | 清华大学 | Device for simulating centrifugal field slope excavating condition |
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