CN217384629U

CN217384629U - Novel assembled lamellar shearing type soil box

Info

Publication number: CN217384629U
Application number: CN202221004547.5U
Authority: CN
Inventors: 范圣刚; 王珺妍; 李帅
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-06
Anticipated expiration: 2032-04-28

Abstract

The utility model discloses a novel assembled layered shearing type soil box, which comprises a soil box base, a first limit unit, a second limit unit and a soil box body, wherein the soil box base, the first limit unit, the second limit unit and the soil box body are arranged on the table surface of a vibration table, the soil box body is formed by overlapping a plurality of subframes layer by layer, each two layers of subframes are connected through a directional sliding support, and the directional sliding support is used for limiting the relative sliding between each two layers of subframes along the X direction; the first limiting unit is arranged on the outer side of the soil box body and used for limiting the moving range of the sub-frame in the X-axis direction, and the X-axis direction is parallel to the vibration direction; through adopting directional sliding support design, realized the free slip between layer and layer in the stratiform shearing type soil box, each layer subframe structure is independent each other not correlated, and it is convenient quick to change the subframe, adopts assembled design, and parts such as subframe all can reuse many times, have reduced experimental cost, and simple manufacture, simple to operate, and the size is easily adjusted, and the suitability is strong.

Description

Novel assembled stratiform shearing type soil box

Technical Field

The utility model belongs to civil engineering soil and structure combined action's shaking table test field, concretely relates to novel assembled stratiform shearing type soil box.

Background

The prototype foundation is a semi-infinite foundation, and in the dynamic test of soil and structures, the model foundation can only select an effective calculation area for simulation. In order to better simulate a prototype foundation, the model foundation needs to meet the requirement of infinite foundation in the action direction of the vibration table. The prototype foundation mainly has the characteristic of shear deformation under the action of seismic waves, and the assembled layered shear type soil box simulates the requirement of layered shear deformation of the prototype foundation through mutual dislocation of the subframes, so that the influence of the boundary of the soil box on the prototype foundation is reduced as much as possible.

Disclosure of Invention

Utility model purpose: in order to overcome the defects existing in the prior art, the utility model provides a novel assembled lamellar shearing type soil box

In order to achieve the above purpose, the utility model adopts the technical scheme that: provides a novel assembled layered shearing soil box, which comprises a soil box base arranged on the table surface of a vibration table, a first limiting unit, a second limiting unit and a soil box body,

the soil box body is formed by stacking a plurality of subframes layer by layer, each two layers of subframes are connected through a directional sliding support, and the directional sliding support is used for limiting the relative sliding between each two layers of subframes along the X direction;

the first limiting unit is arranged on the outer side of the soil box body and used for limiting the moving range of the sub-frame in the X-axis direction, and the X-axis direction is parallel to the vibration direction;

the second limiting unit is arranged on the outer side of the soil box body and used for limiting the movement of the sub-frame in the y-axis direction and plane torsional vibration, and the y-axis direction is the vertical vibration direction.

Preferably, a plurality of said directional sliding supports are provided on the sub-frame on both sides parallel to the vibration direction, each of said directional sliding supports comprising: the steel base plate is fixedly connected with the sub-frame; the slideway is arranged on the steel base plate; and the ball is placed on the slide way.

Preferably, the flexible material is attached to the inner walls of the soil box body along the vertical vibration direction.

Preferably, the first limiting unit includes: the upright column is arranged on the soil box base; the cross beam is connected with the upright post; the supporting beam is connected with the upright post; the anti-collision plate is arranged on the side surface where the upright post and the support beam are arranged;

the second limiting unit comprises a steel plate, and the steel plate is attached to the side face of the soil box body and is fixed on the soil box base.

Preferably, the sub-frame is formed by fixedly connecting four square steel pipes.

Preferably, the cross section of the slide is trapezoidal.

Preferably, the connection between the upright post and the soil box base and the connection between the upright post and the cross beam are all flange plate connections.

Preferably, the support beam is connected with the upright post through a turn buckle.

Preferably, the surface of the soil box base is divided into nine grids, and the nine grids are fixedly arranged on the table top of the vibration table through anchor bolts.

Compared with the prior art, the utility model, following beneficial effect has:

1. by adopting the design of the directional sliding support, free sliding between layers in the layered shear type soil box is realized, the subframes of all layers are independent and not related to each other, when some subframes are damaged and can not be used continuously, the subframes are convenient and quick to replace, and the maintenance cost and the later test cost are reduced.

2. By adopting the assembly type design, the parts such as the sub-frames and the like can be repeatedly utilized for a plurality of times, the test cost is reduced, the manufacture is simple, the installation is convenient, the size is easy to adjust, the applicability is strong, the shearing deformation characteristic of the prototype foundation is simulated by the mutual dislocation between the layers of the sub-frames, and the method can be widely applied to the test of the relevant vibration table working together with the soil and the structure.

3. The stand all adopts ring flange nodal connection with being connected between soil box base, the crossbeam, is convenient for dismantle, also is convenient for adjust the straightness that hangs down of stand simultaneously, and a supporting beam adopts turn-buckle, has reduced the equipment degree of difficulty.

4. The soil box base divides the net can increase the frictional force of bottom of the case soil body and base upper surface, lets the earthquake wave spread to the soil body better.

Drawings

FIG. 1 is a schematic view of an assembled laminar shear soil box model according to the present invention;

FIG. 2 is a view showing the installation of a base of the fabricated type stratified shearing soil box of the present invention;

FIG. 3 is a view showing the installation of a sub-frame of the fabricated laminar shear type soil box of the present invention;

FIG. 4 is a side view of the assembled type stratified shearing soil box of the present invention, taken along a vertical vibration direction;

FIG. 5 is a side view of the assembled laminar shear soil box of the present invention, taken along a direction parallel to the direction of vibration;

FIG. 6 is a top layout view of the fabricated laminar shear soil box of the present invention;

FIG. 7 is a design drawing of the directional sliding support of the fabricated laminar shear soil box of the present invention;

in the figure: a cross beam 1; an anti-collision plate 2; a support beam 3; a turn buckle 4; a soil box base 5; a steel bar 6; a screw 7; a steel plate 8; a column 9; a sub-frame 10; a slideway 11; a ball 12.

Detailed Description

The invention will be further elucidated with reference to the drawings and specific embodiments, it being understood that these examples are intended to illustrate the invention only and are not intended to limit the scope of the invention, and that modifications to the various equivalent forms of the invention, which may occur to those skilled in the art after reading the present invention, fall within the scope of the invention as defined in the claims appended hereto.

As shown in fig. 1 to 6, the novel assembly type layered shear soil box comprises a soil box base 5, a first limiting unit, a second limiting unit and a soil box body, wherein the soil box base 5, the first limiting unit, the second limiting unit and the soil box body are arranged on a table top of a vibration table, the soil box body is formed by stacking a plurality of subframes 10 layer by layer, each two layers of subframes 10 are connected through a directional sliding support, and the directional sliding support is used for limiting relative sliding between each two layers of subframes 10 along the X direction;

the first limiting unit is arranged on the outer side of the soil box body and used for limiting the moving range of the sub-frame 10 in the X-axis direction, and the X-axis direction is a parallel vibration direction;

the second limiting unit is arranged on the outer side of the soil box body and used for limiting the movement of the sub-frame 10 in the y-axis direction and the plane torsional vibration, and the y-axis direction is the vertical vibration direction.

The anti-collision plate 2 is arranged on the side surface provided with the upright post 9 and the support beam 3, the upright post 9 is respectively connected with the beam 1 and the support beam 3, and the steel bar 6 is vertically arranged on the outer side of the sub-frame 10.

As shown in fig. 2, the assembled layered shear soil box base 5 is fixed, the base of the assembled layered shear soil box is fixed on the table top of the vibration table through anchor bolts, the upper surface of the soil box base 5 is divided into nine grids, and the grids divided by the soil box base can increase the friction force between the soil body at the bottom of the box and the upper surface of the base, so that seismic waves can be better transmitted to the soil body. Make stand 9 conveniently carry out ring flange nodal connection with soil box base 5, convenient to detach, still be convenient for adjust the straightness that hangs down of stand 9.

As shown in fig. 3, after the soil box base 5 is installed, the sub-frames 10 are installed in an upward layer-by-layer overlapping manner, the sub-frames 10 are formed by fixedly connecting four square steel pipes, a plurality of directional sliding supports are averagely arranged between every two layers of the sub-frames 10 and on two sides parallel to the vibration direction, the number of the directional sliding supports between every two sub-frames 10 is not less than 2, and free sliding between layers in the layered shear type soil box is realized. The arrangement of the directional sliding supports is as shown in fig. 7, the upper side of the uppermost layer of sub-frame 10 and the lower side of the lowermost layer of sub-frame 10 are not provided with the directional sliding supports, steel backing plates are respectively welded on the upper side and the lower side of the sub-frame 10, cross-section slideways 11 are arranged on the steel backing plates, balls 12 are placed in each slideway 11 to form the directional sliding supports, and the number of the balls 12 in each directional sliding support is not less than 1; the cross section of the slideway 11 is in a shape such as a trapezoid cross section, and the ball 12 is prevented from sliding out of the slideway 11 in the test process by using the limitation of the upper slideway 11 and the lower slideway 11. While ensuring the difficulty of installation and the friction between the sub-frames 10, the largest possible deformation range of the soil box is provided.

As shown in fig. 4, after the sub-frame 10 is assembled, in order to ensure the coordinated deformation of the sub-frame 10, a layer of steel plate 8 is fixed on each side of the fabricated layered shear type soil box along the vertical vibration direction, and a layer of flexible material is attached on the inner wall of each side of the soil box along the vertical vibration direction, so as to reduce the boundary effect of the box wall. After the steel plate 8 is fixedly installed, the movement of the soil box along the vertical vibration direction, namely the movement along the Y-axis direction and the plane torsional vibration are limited. The upright posts 9 and the supporting beams 3 are arranged on two sides of the outer portion of the soil box body along the parallel vibration direction, meanwhile, as shown in fig. 5, a plurality of anti-collision plates 2 are respectively welded on two side faces where the upright posts 9 and the supporting beams 3 are arranged, the upright posts 9, the cross beams 1 and the supporting beams 3 form a frame whole, a certain distance is reserved between the frame whole and the soil box body, the problem that the soil box is free to deform without limit in the test process is solved, and the moving range of the sub-frame in the parallel vibration direction, namely the X-axis direction, is limited. The supporting beam 3 is connected with the upright post 9 by adopting the turn buckle 4, so that the assembly difficulty is reduced. The upright posts 9 are connected with the cross beams through flange joints, the cross beams can be freely disassembled, and the sub-frame 10 structure can be conveniently increased and decreased for assembly.

After the side arrangement of the assembled type layered shear soil box is completed, as shown in fig. 6, the vertical columns 9 on both sides parallel to the vibration direction are connected by the cross beam 1, and the vertical columns 9, the cross beam 1 and the support beam 3 form a frame whole. Waterproof cloth such as rubber membrane or plastics adheres to on each surface of the inboard of soil box, avoids the seepage of incasement soil and water.

The inside device of the soil box body is provided with waterproof cloth such as rubber films or plastics attached to the inner side surfaces of the soil box body, so that the leakage of soil and water in the soil box is avoided. And flexible materials are attached to the inner walls of the two sides of the soil box body along the vertical vibration direction so as to weaken the boundary effect of the box wall. Aiming at the problem of high construction cost of the layered shear type soil box, the invention adopts the assembly design, and the parts such as the sub-frame and the like can be repeatedly utilized, thereby reducing the test cost. The shear deformation characteristic of the prototype foundation is simulated through the mutual dislocation between the layers of the sub-frame, and the method can be widely applied to the test of the related vibration table of the joint work of soil and structure

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A novel assembled type layered shearing soil box is characterized by comprising a soil box base arranged on the table surface of a vibration table, a first limiting unit, a second limiting unit and a soil box body,

2. The novel fabricated laminar-shear soil box according to claim 1, wherein: a plurality of the directional sliding supports are arranged on the two sides of the sub-frame parallel to the vibration direction, and each directional sliding support comprises:

the steel base plate is fixedly connected with the sub-frame;

the slideway is arranged on the steel base plate;

and the ball is placed on the slide way.

3. The novel fabricated laminar-shear soil box according to claim 1, wherein: and flexible materials are attached to the inner walls of the two sides of the soil box body along the vertical vibration direction.

4. The novel fabricated laminar-shear soil box according to claim 1, wherein: the first limiting unit comprises:

the upright column is arranged on the soil box base;

the cross beam is connected with the upright post;

the supporting beam is connected with the upright post;

the anti-collision plate is arranged on the side surface where the upright post and the support beam are arranged;

5. The novel fabricated laminar-shear soil box according to claim 1, wherein: the sub-frame is formed by fixedly connecting four square steel pipes.

6. The novel fabricated laminar-shear soil box of claim 2, wherein: the cross-section of the slide is trapezoidal.

7. The novel assembled laminar shear soil box of claim 4, wherein: the connection between the upright post and the soil box base and the connection between the upright post and the cross beam are all flange plate connections.

8. The novel assembled laminar shear soil box of claim 4, wherein: the supporting beam is connected with the upright post through a turn buckle.

9. The novel fabricated laminar-shear soil box according to claim 1, wherein: the surface of the soil box base is divided into nine grids which are fixedly arranged on the table top of the vibration table through anchor bolts.