CN220136871U - Array type air pressure driving retaining wall deflection simulation test system - Google Patents
Array type air pressure driving retaining wall deflection simulation test system Download PDFInfo
- Publication number
- CN220136871U CN220136871U CN202321168070.9U CN202321168070U CN220136871U CN 220136871 U CN220136871 U CN 220136871U CN 202321168070 U CN202321168070 U CN 202321168070U CN 220136871 U CN220136871 U CN 220136871U
- Authority
- CN
- China
- Prior art keywords
- retaining wall
- air pressure
- test system
- simulation test
- array type
- 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.)
- Active
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 28
- 239000002689 soil Substances 0.000 claims abstract description 37
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an array type air pressure driving retaining wall deflection simulation test system which comprises a soil filling box, front and rear baffles and a horizontal pushing system. The front baffle plate and the rear baffle plate simulate foundation pit retaining walls, springs are arranged between the two baffle plates in an array mode and are respectively connected with the front baffle plate and the rear baffle plate, the front baffle plate is composed of rigid blocks with U-shaped grooves of the same size, the rigid blocks can slide relatively, and a horizontal traction device is connected to the rigid blocks. The horizontal traction device consists of a push rod, a hinged connecting rod, a pneumatic compression rod, an air bag and an inflator pump. The horizontal pulling device can pull the front retaining wall and the rear retaining wall to rotate or horizontally displace. The utility model solves the problem that the displacement analysis of the adjacent structure induced by the displacement of the existing foundation pit retaining wall can not meet the requirement.
Description
Technical Field
The utility model belongs to the technical field of foundation pit engineering, and particularly relates to an array type air pressure driving retaining wall deflection simulation test system.
Background
The excavation of the foundation pit causes the displacement of the enclosure structure to damage the pressure balance in the adjacent soil body, so that the adjacent building structure is horizontally displaced or a certain amount of settlement occurs. At present, strict numerical analysis or theoretical calculation is lacking in analysis of displacement-induced adjacent structure displacement of a foundation pit retaining wall, the time required by the strict numerical analysis is long, the parameter selection in the theoretical calculation is more verified by a test, and certain errors exist in estimation of displacement-induced adjacent structure displacement of the foundation pit retaining wall, so that waste or potential safety hazard in design is often brought; more manpower and material resources are often needed for on-site monitoring, and information feedback in engineering also has certain timeliness, so that a good effect cannot be achieved on a project under construction.
Disclosure of Invention
The utility model aims at: in order to solve the problem that the displacement analysis of the adjacent structure induced by the displacement of the existing foundation pit retaining wall can not meet the requirement, the array type air pressure driving retaining wall displacement simulation test system is provided.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an array type air pressure driving retaining wall deflection simulation test system comprises a soil filling box, wherein a vertical rear baffle is arranged in the soil filling box, a foundation pit chamber is formed in the soil filling box at the rear side of the rear baffle, and soil is filled in the foundation pit chamber; a plurality of first springs distributed in a rectangular array are fixed between the front baffle plate and the rear baffle plate, the front end of each first spring is fixedly provided with a rigid block with a U-shaped groove, and the rigid blocks with the U-shaped grooves are closely paved to form a front baffle plate which is as large as the rear baffle plate; the rear baffle, the first spring and the front baffle form a retaining wall stiffness simulation box together; a horizontal pulling device is arranged on the left side of each rigid block with the U-shaped groove; the retaining wall stiffness simulation box is pushed to displace through the horizontal traction device, and the soil in the foundation pit chamber is extruded to deform.
As a further description of the above technical solution:
the soil filling box is made of organic glass.
As a further description of the above technical solution:
the rigid block with the U-shaped groove is made of organic glass; on the side that adjacent rigid block contacted, open flutedly on one of them side, be fixed with the lug on the other side, the lug is arranged in corresponding recess and can follow fore-and-aft direction relative movement.
As a further description of the above technical solution:
the horizontal traction device comprises a loading box with an opening facing left, wherein an air bag, a first baffle plate, a second spring and a second baffle plate are sequentially arranged in the loading box from right to left, and the first baffle plate and the second baffle plate are both in vertical positions and can move left and right; a push rod is fixed on the left side of the second partition board, and the left end of the push rod is sequentially hinged with a first hinged connecting rod, a second hinged connecting rod, a third hinged connecting rod and a pneumatic compression rod; a triangular bracket is fixed above the left end face of the loading box, and the upper middle position of the second hinged connecting rod is hinged to the left end of the triangular bracket; the right side of the upper end face of the loading box is fixedly provided with a positioning clamping groove with an inverted U-shaped vertical section, the pneumatic compression bar is arranged in the clamping groove and is kept horizontal, the right end of the pneumatic compression bar extends downwards, and the right end of the pneumatic compression bar is fixedly provided with a vertical loading plate.
As a further description of the above technical solution:
the pneumatic compression bar is provided with scales.
As a further description of the above technical solution:
the surface of the loading plate is provided with a miniature stress sensor.
As a further description of the above technical solution:
the right end face of the loading box is provided with a through hole, an air duct is arranged in the through hole, one end of the air duct is connected to the air bag, the other end of the air duct is connected with an air pump, and an air pressure gauge is arranged on the air duct.
As a further description of the above technical solution:
and a displacement sensor is arranged on the surface of the foundation pit, which is filled with soil in the chamber.
As a further description of the above technical solution:
the left side of the rigid block with the U-shaped groove is provided with a plurality of shells distributed in a rectangular array, the left end and the right end of each shell are both open, and each horizontal traction device is arranged in the corresponding shell.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
(1) According to the utility model, the traditional jack loading device is replaced by the horizontal traction device, the pushing pressure on each horizontal traction device is controlled by air pressure at the same time, and compared with the control by a plurality of groups of jacks, the control is more convenient, the stress change on the retaining wall in the foundation pit can be simulated very accurately, and the displacement change of the retaining wall is induced.
(2) According to the utility model, the horizontal traction device is arranged as the lever, the stroke of the driving end (namely the air bag) of the lever is increased, the force of the output end (namely the pneumatic compression bar and the loading plate) is increased, so that the upper limit of the thrust of the horizontal traction device on the rigid block with the U-shaped groove is increased, the requirement of loading force is met, and the device is more in line with the actual working condition.
(3) According to the utility model, the displacement change of each part of the retaining wall can be accurately simulated by adjusting the partition size of the rigid block with the U-shaped groove, and the smaller the area of the rigid block is, the more accurate the simulated displacement change of the retaining wall can be.
(4) According to the utility model, the retaining wall stiffness simulation box is used, so that the stiffness change of different retaining wall simulation materials can be simulated, and the retaining wall stiffness change can be adjusted by replacing the first spring in the retaining wall stiffness simulation box.
(5) The utility model can simulate the condition that the displacement change of the retaining wall induces the internal force change of the soil body behind the wall, and can also add adjacent building structures such as tunnel models, ground buildings and the like in the foundation pit chamber, thereby simulating the displacement generated by the adjacent structures induced by the foundation pit excavation, and researching the influence of the foundation pit excavation on the adjacent structures.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
fig. 2 is a schematic view of the internal three-dimensional structure of the soil filling box 1 of the present utility model;
FIG. 3 is a perspective view of a retaining wall stiffness simulator box;
FIG. 4 is a perspective view of the rigid block 6 with U-shaped slot;
FIG. 5 is a perspective view of the horizontal pulling device;
fig. 6 is an internal perspective view of the horizontal drawing device.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-6, the present utility model provides a technical scheme of an array type air pressure driving retaining wall deflection simulation test system:
an array type air pressure driving retaining wall deflection simulation test system comprises a soil filling box 1, wherein a vertical rear baffle plate 2 is arranged in the soil filling box 1, a foundation pit chamber 3 is formed at the rear side of the rear baffle plate 2 in the soil filling box 1, and soil is filled in the foundation pit chamber 3; the front end face of the rear baffle plate 2 is fixedly provided with a plurality of first springs 4 distributed in a rectangular array, the front end of each first spring 4 is fixedly provided with a rigid block 6 with a U-shaped groove, and the rigid blocks 6 with the U-shaped grooves are closely paved to form a front baffle plate 5 which is as large as the rear baffle plate 2; the right baffle plate 2, the first spring 4 and the front baffle plate 5 form a retaining wall stiffness simulation box together; the left side of each rigid block 6 with the U-shaped groove is provided with a horizontal traction device; the retaining wall stiffness simulation box is pushed to displace through the horizontal traction device, and the soil body in the foundation pit chamber 3 is extruded to deform.
The soil filling box 1 is made of organic glass.
The rigid block 6 with the U-shaped groove is made of organic glass; the adjacent rigid blocks 6 with U-shaped grooves are contacted with one side surface provided with grooves 7, the other side surface is fixedly provided with convex blocks 8, and the convex blocks 8 are arranged in the corresponding grooves 7 and can move along the front-back direction.
The horizontal traction device comprises a loading box 9 with an opening facing left, wherein an air bag 10, a first partition plate 11, a second spring 12 and a second partition plate 13 are sequentially arranged in the loading box 9 from right to left, and the first partition plate 11 and the second partition plate 13 are both in vertical positions and can move left and right; a push rod 14 is fixed on the left side of the second partition plate 13, and a first hinged connecting rod 15, a second hinged connecting rod 16, a third hinged connecting rod 17 and a pneumatic compression rod 18 are hinged at the left end of the dowel bar 14 in sequence; a tripod 19 is fixed above the left end face of the loading box 9, and the middle upper position of the second hinging rod 16 is hinged at the left end of the tripod 19; the right side of the upper end surface of the loading box 9 is fixedly provided with a positioning clamping groove 20 with an inverted U-shaped vertical section, the pneumatic compression bar 18 is arranged in the clamping groove and is kept horizontal, the right end of the pneumatic compression bar 18 extends downwards, and the right end of the pneumatic compression bar 18 is fixedly provided with a vertical loading plate 21.
The pneumatic compression bar 18 is provided with scales.
The surface of the loading plate 21 is provided with a miniature stress sensor.
The right end face of the loading box 9 is provided with a through hole 22, an air duct 23 is arranged in the through hole 22, one end of the air duct 23 is connected to the air bag 10, the other end of the air duct 23 is connected with an air pump, and an air pressure gauge 24 is arranged on the air duct 23.
The surface of the foundation pit chamber 3 filled with soil body is provided with a displacement sensor.
The left side of the rigid block 6 with the U-shaped groove is provided with a plurality of shells 25 distributed in a rectangular array, the left end and the right end of each shell 25 are both open, and each horizontal traction device is arranged in the corresponding shell 25.
Working principle:
before use, the soil filling box 1 is fixed through a steel frame, then the retaining wall rigidity simulation box and the horizontal traction device are sequentially placed into the soil filling box 1 according to the size of the needed foundation pit chamber 3, soil is filled and tamped in layers in the foundation pit chamber 3, and a displacement sensor is arranged on the surface of the soil filling; the horizontal pulling device is connected with an air pump through an air duct 23.
When the device is used, the air pump is started, the air bag 10 is inflated through the air duct 23, the air bag 10 is inflated to push the first partition board 11 to move leftwards, the second partition board 13 is driven to move leftwards through the second spring 12, the lower end of the second hinge connecting rod 16 is driven to rotate leftwards through the first hinge connecting rod 15, the upper end of the second hinge connecting rod 16 is rotated rightwards, the pneumatic compression rod 18 and the loading plate 21 are driven to horizontally move rightwards through the third hinge connecting rod 17, the loading plate 21 pushes the rigid block 6 with the U-shaped groove rightwards, then the air pump output air pressure is regulated according to specific experimental conditions, so that the horizontal displacement of the loading plate 21 is regulated, the stress between the loading plate 21 and the retaining wall rigidity simulation box is changed, the change condition of retaining wall displacement in actual engineering is simulated, and then the soil body in the foundation pit chamber 3 is induced to deform, and the method is as follows: the loading plate 21 extrudes the rigid block 6 with the U-shaped groove, compresses the first springs 4, extrudes the rear baffle plate 2 through the plurality of first springs 4, and extrudes soil in the foundation pit chamber 3 through the rear baffle plate 2 to deform.
In the test process, displacement data generated in the loading process of the loading plate 21, namely displacement data of each rigid block 6 with the U-shaped groove, are collected through scales arranged on the positioning clamping groove 20; meanwhile, the displacement data of the soil surface are collected through the displacement sensors distributed on the soil surface in the foundation pit chamber 3, so that comparison is performed.
The air pump output air pressure is adjusted through the displacement data acquired in the actual engineering, so that the stress and the displacement of each horizontal loading device are adjusted, the displacement change condition of the retaining wall required by the test is finally achieved, and the displacement change of the retaining wall can be simulated to induce the displacement and the internal force change condition of the soil body behind the retaining wall; and the deformation and settlement conditions of the actual soil can be estimated by observing the deformation conditions of the soil in the soil chamber.
It should be noted that, considering that the force required for inducing the deformation of the soil body in the test is larger, in order to meet the requirement, the horizontal loading device is arranged to form a lever, the stroke of the driving end (i.e. the air bag 10) of the lever is increased, the force of the output end (i.e. the pneumatic compression bar 18 and the loading plate 21) is increased, so that the upper limit of the pushing force of the horizontal pulling device on the rigid block 6 with the U-shaped groove is increased, and the requirement of the loading force is met.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and those skilled in the art should appreciate that the technical scheme and the inventive concept according to the present utility model are equivalent or changed within the scope of the present utility model.
Claims (9)
1. The array type air pressure driving retaining wall deflection simulation test system is characterized by comprising a soil filling box (1), wherein a vertical rear baffle plate (2) is arranged in the soil filling box (1), a foundation pit chamber (3) is formed at the rear side of the rear baffle plate (2) in the soil filling box (1), and soil is filled in the foundation pit chamber (3); the front end face of the rear baffle plate (2) is fixedly provided with a plurality of first springs (4) distributed in a rectangular array, the front end of each first spring (4) is fixedly provided with a rigid block (6) with a U-shaped groove, and the front baffle plate (5) is formed by closely paving the rigid blocks (6) with the U-shaped grooves; the rear baffle (2), the first spring (4) and the front baffle (5) form a retaining wall rigidity simulation box together; a horizontal traction device is arranged on the left side of each rigid block (6) with the U-shaped groove; the retaining wall stiffness simulation box is pushed to displace through the horizontal traction device, and the soil body in the foundation pit chamber (3) is extruded to deform.
2. The array type air pressure driving retaining wall deflection simulation test system according to claim 1, wherein the earth filling box (1) is made of organic glass.
3. The array type air pressure driving retaining wall deflection simulation test system according to claim 1, wherein the rigid block (6) with the U-shaped groove is made of organic glass; on the side that adjacent rigid piece (6) of taking U type groove contacted, open recess (7) on one of them side is fixed with lug (8) on the other side, and lug (8) are arranged in corresponding recess (7) and can follow fore-and-aft direction and remove.
4. The array type air pressure driving retaining wall deflection simulation test system according to claim 1, wherein the horizontal pulling device comprises a loading box (9) with an opening facing left, an air bag (10), a first partition plate (11), a second spring (12) and a second partition plate (13) are sequentially arranged in the loading box (9) from right to left, and the first partition plate (11) and the second partition plate (13) are both in vertical positions and can move left and right; a push rod (14) is fixed on the left side of the second partition plate (13), and a first hinged connecting rod (15), a second hinged connecting rod (16), a third hinged connecting rod (17) and a pneumatic compression rod (18) are hinged at the left end of the push rod (14) in sequence; a triangular bracket (19) is fixed above the left end surface of the loading box (9), and the middle upper position of the second hinged connecting rod (16) is hinged at the left end of the triangular bracket (19); the right side of the upper end face of the loading box (9) is fixedly provided with a positioning clamping groove (20) with an inverted U-shaped vertical section, a pneumatic pressing rod (18) is arranged in the clamping groove and is kept horizontal, the right end of the pneumatic pressing rod (18) extends downwards, and the right end of the pneumatic pressing rod (18) is fixedly provided with a vertical loading plate (21).
5. The array type air pressure driving retaining wall deflection simulation test system according to claim 4, wherein scales are arranged on the air pressure rods (18).
6. The array type air pressure driving retaining wall deflection simulation test system according to claim 4, wherein the surface of the loading plate (21) is provided with a miniature stress sensor.
7. The array type air pressure driving retaining wall deflection simulation test system according to claim 4, wherein a through hole (22) is formed in the right end face of the loading box (9), an air duct (23) is arranged in the through hole (22), one end of the air duct (23) is connected to the air bag (10), the other end of the air duct (23) is connected with an air pump, and an air pressure meter (24) is arranged on the air duct (23).
8. The array type air pressure driving retaining wall deflection simulation test system according to claim 1, wherein a displacement sensor is arranged on the surface of the foundation pit chamber (3) filled with soil.
9. The array type air pressure driving retaining wall deflection simulation test system according to claim 1, wherein a rectangular array distributed shell (25) is arranged on the left side of the front baffle (5), the left end and the right end of the shell (25) are opened, and the horizontal pulling device is arranged in the shell (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321168070.9U CN220136871U (en) | 2023-05-14 | 2023-05-14 | Array type air pressure driving retaining wall deflection simulation test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321168070.9U CN220136871U (en) | 2023-05-14 | 2023-05-14 | Array type air pressure driving retaining wall deflection simulation test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220136871U true CN220136871U (en) | 2023-12-05 |
Family
ID=88959756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321168070.9U Active CN220136871U (en) | 2023-05-14 | 2023-05-14 | Array type air pressure driving retaining wall deflection simulation test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220136871U (en) |
-
2023
- 2023-05-14 CN CN202321168070.9U patent/CN220136871U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107179396B (en) | Multifunctional assembled geotechnical engineering physical similarity test system | |
| CN103953074B (en) | Open tubular pile hammering injection simulation experiment device and experiment method | |
| CN109839315A (en) | Simulate the two-way sliding physical model case and Cross-fault leveling tunnel mechanics performance testing method in Cross-fault leveling tunnel | |
| CN112697598B (en) | Pile net railway roadbed plane strain test device and method for simulating foundation expansion and shrinkage | |
| CN110940571B (en) | Test device for simulating dynamic soil arch effect of shed frame structure | |
| CN110468892B (en) | Two-dimensional similar soil model test device and test method | |
| CN110232860A (en) | Multifunction test device and its test method for soil mechanics plane strain problems | |
| CN213875269U (en) | Multifunctional tunnel model test device | |
| CN110805076A (en) | Test device and method for simulating reinforcement of passive area of foundation pit | |
| CN113791195B (en) | Device and method for obtaining landslide retaining structure test data | |
| CN112683561B (en) | Earthquake fault simulation experiment platform | |
| CN107907286A (en) | A kind of new unsymmetrial loading tunnel Research on Shaking Table for Simulating system | |
| CN110044562A (en) | A kind of reinforcement retaining wall failure mechanism experimental rig and application method | |
| CN109026092A (en) | The impact of adjustable rigidity is unloaded can effect device and method | |
| CN115615821A (en) | Underground diaphragm wall model test device and test method | |
| CN220136871U (en) | Array type air pressure driving retaining wall deflection simulation test system | |
| CN221238768U (en) | Multifunctional visual model box for rock-soil model test | |
| CN108269479A (en) | A kind of simulator of shallow foundation foundation failure | |
| CN112435527A (en) | Matching type box structure for simulating fault motion | |
| CN208718699U (en) | The impact of adjustable rigidity is unloaded can means for influencing | |
| CN211784789U (en) | Electric movable retaining wall test system | |
| CN211037079U (en) | Two-dimensional similar soil model test device | |
| CN215492325U (en) | Earthquake resistance simulator for testing and detecting civil engineering | |
| CN110501233B (en) | Test device for simulating wall deflection to induce wall rear soil deformation through water pressure drive | |
| CN209993232U (en) | Excavation die for simulating roadway step method through model test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Mingyu Inventor after: Wei Wei Inventor after: Cui Yi Inventor after: Shi Yulong Inventor after: Cai Yunpeng Inventor after: Liu Tao Inventor after: Jin Junwei Inventor after: Wang Wenbin Inventor after: Hao Yunlong Inventor before: Cui Yi Inventor before: Cai Yunpeng Inventor before: Liu Tao Inventor before: Shi Yulong Inventor before: Li Mingyu Inventor before: Jin Junwei Inventor before: Wei Wei Inventor before: Hao Yunlong Inventor before: Wang Wenbin |
|
| CB03 | Change of inventor or designer information |