CN213709650U - Combined supporting system for model test - Google Patents
Combined supporting system for model test Download PDFInfo
- Publication number
- CN213709650U CN213709650U CN202022714977.3U CN202022714977U CN213709650U CN 213709650 U CN213709650 U CN 213709650U CN 202022714977 U CN202022714977 U CN 202022714977U CN 213709650 U CN213709650 U CN 213709650U
- Authority
- CN
- China
- Prior art keywords
- surface layer
- model test
- supporting
- piles
- crown beam
- 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
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a system is strutted in combination for model test, its technical scheme is: the top of the surface layer is detachably connected with the crown beam, and a plurality of supporting piles penetrate through the crown beam and are arranged along the length direction of the crown beam; the supporting piles are positioned on one side of the surface layer and are parallel to the surface layer, and a plurality of waist beams are arranged on the other side of the surface layer at intervals along the height direction of the surface layer; the support piles are connected with the surface layer and the waist beam through U-shaped bolts, and the U-shaped bolts are rotatably connected with the soil nails. The utility model has simple structure and convenient assembly, and can effectively simulate a pile-soil nail-surface layer combined supporting system; the stress process of the waist beam, the surface layer and the soil nails during soil body excavation can be truly reflected.
Description
Technical Field
The utility model relates to a civil engineering geotechnical test field especially relates to a system is strutted in combination for model test.
Background
In recent years, with the increase of social population and the acceleration of urbanization process, the construction in cities is rapidly developed, and a large number of deep foundation pit projects appear, wherein the construction difficulty is high, the complexity of the environment around the foundation pit is high, and other challenges are faced. Meanwhile, various forms of foundation pit supporting forms appear, and the study on the deformation of the foundation pit under different supporting forms and the influence of the supporting forms on the surrounding environment is particularly important.
In order to research the influence of different combined supporting systems on a foundation pit and the stress process between supports, various novel supporting combined systems are applied to a model test. Utility model patent with publication number CN 211228632U discloses a foundation ditch stake anchor support system physical simulation device based on similar theory, nevertheless because the model device is connected simply, the stake probably produces great displacement, does not also consider the influence of surface course to whole support system atress. The utility model with the publication number of CN 207998876U discloses a model test device for the mechanism of action of a pile-soil-anchor combined supporting system, and the model test device does not consider the action of a crown beam and a surface layer on the whole supporting system and has certain influence on the accuracy of the result.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a combined supporting system for model tests, which has simple structure and convenient assembly and can effectively simulate a pile-soil nail-surface layer combined supporting system; the stress process of the waist beam, the surface layer and the soil nails during soil body excavation can be truly reflected.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
the embodiment of the utility model provides a combined supporting system for model tests, which comprises a surface layer, supporting piles and soil nails, wherein the top of the surface layer is detachably connected with a crown beam, and a plurality of supporting piles penetrate through the crown beam and are arranged along the length direction of the crown beam; the supporting piles are positioned on one side of the surface layer and are parallel to the surface layer, and a plurality of waist beams are arranged on the other side of the surface layer at intervals along the height direction of the surface layer; the support piles are connected with the surface layer and the waist beam through U-shaped bolts, and the U-shaped bolts are rotatably connected with the soil nails.
As a further implementation manner, a plurality of holes are reserved at the top of the crown beam, and the support piles penetrate through the holes.
As a further implementation mode, the crown beam is connected with the surface layer through a plurality of pretightening force bolts.
As a further implementation mode, the head of the pretightening force bolt is installed towards one side, close to the support pile, of the surface layer.
As a further implementation manner, the crown beam comprises a first side plate and a second side plate which are perpendicular to each other, the first side plate is attached to the surface layer, and the top surface of the surface layer is attached to the surface of the second side plate.
As a further implementation, the crown beam is made of angle steel.
As a further implementation, the soil nail is connected with the closed end of the U-bolt through a pin.
As a further implementation manner, the soil nails are distributed at intervals in the height direction of the support piles, and the number of the soil nails connected with each support pile is the same as that of the wale.
As a further implementation, the support piles are perpendicular to the wale.
As a further implementation mode, the surface layer is made of PVC plates, the soil nails are made of PVC pipes, the waist beams are made of PVC plates, and the support piles are made of PPR pipes.
Above-mentioned the utility model discloses an embodiment's beneficial effect as follows:
(1) the waist beam, the support pile and the surface layer of one or more embodiments of the utility model are connected and fixed through the U-shaped bolt, the soil nail is connected with the U-shaped bolt through the pin, the stress process of the waist beam, the surface layer and the soil nail is the same as that of the actual engineering, and the stress process of the waist beam, the surface layer and the soil nail can be truly reflected when the soil body is excavated; the structure is simple, the assembly is convenient, the connecting effect between model components is good, and a pile-soil nail-surface layer combined supporting system can be effectively simulated;
(2) the U-shaped bolt head (one end without threads) of one or more embodiments of the utility model is connected with the soil nail through the pin, so that the displacement of the soil nail in the soil body can not be limited, and the stress process of the soil nail in the excavation process can be truly simulated;
(3) one or more embodiments of the utility model can judge the displacement of the foundation pit and the internal force change of the pile, the surface layer and the soil nail without the spacing by adjusting the spacing between the support pile and the soil nail in the model;
(4) the utility model discloses a pretightning force bolt head of one or more embodiments is inboard towards the surface course, at simulation foundation ditch excavation process, can judge through the space of observing between screw thread and the nut that be connected with between crown beam and the surface course does not have not hard up.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic overall structure diagram of the present invention according to one or more embodiments;
fig. 2 is a schematic view of a support pile and face layer connection according to one or more embodiments of the present disclosure;
FIG. 3 is a schematic illustration of a soil nail, a support pile, a face layer connection according to one or more embodiments of the present invention;
FIG. 4 is a schematic illustration of a soil nail and U-bolt connection according to one or more embodiments of the present invention;
1-1 part of supporting piles, 1-2 parts of waist beams, 1-3 parts of soil nails, 1-4 parts of crown beams, 1-5 parts of surface layers, 1-6 parts of nuts, 2-1 part of pretightening bolts, 2-2 parts of U-shaped bolts, 3-1 part of pins.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" when appearing in this application are intended only to designate directions that are consistent with the up, down, left and right directions of the drawings themselves, and not to limit the structure, but merely to facilitate description of the invention and to simplify description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two elements may be connected directly or indirectly through an intermediate medium, or the two elements may be connected internally or in an interaction relationship, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.
The first embodiment is as follows:
the embodiment provides a combined supporting system for a model test, which is suitable for a foundation pit model test and comprises a supporting component, a transverse reinforcing component and surface layers 1-5 as shown in figures 1-3, wherein the supporting component comprises a plurality of supporting piles 1-1 and soil nails 1-3, and the transverse reinforcing component comprises a crown beam 1-4 and a plurality of waist beams 1-2; the top end of the surface layer 1-5 is detachably connected with the crown beam 1-4, and the plurality of supporting piles 1-1 penetrate through the crown beam 1-4 and are arranged in parallel with the surface layer 1-5. The soil nails 1-3 are detachably connected with the support piles 1-1, the surface layers 1-5 and the waist beams 1-2 through U-shaped bolts 2-2.
In the embodiment, the surface layers 1-5 are made of PVC plates, bolt holes are reserved on the surfaces of the surface layers 1-5, and the crown beams 1-4, the waist beams 1-2 and the support piles 1-1 are fixed on the surface layers 1-5 through corresponding connecting pieces, so that a complete model test device is formed.
The crown beam 1-4 is made of angle steel, and the crown beam 1-4 is connected with the surface layer 1-5 through a plurality of pretightening force bolts 2-1. The head (the side without threads) of the pretightening force bolt 2-1 faces the inner side (the side far away from the supporting pile 1-1) of the surface layer 1-5, and the looseness condition of the connection between the surface layer 1-5 and the crown beam 1-4 is judged by observing the looseness condition of a nut in the soil excavation process.
Further, the crown beam 1-4 is provided with a first side plate parallel to the surface layer 1-5 and a second side plate perpendicular to the first side plate, wherein the first side plate is attached to the surface layer 1-5, and the top surface of the surface layer 1-5 is attached to the surface of the second side plate, so that the crown beam 1-4 and the surface layer 1-5 are stably connected. A plurality of holes are formed in the second side plate at intervals in the length direction, the support piles 1-1 penetrate through the holes, one end of each support pile 1-1 exceeds the hole for a certain distance, and the other end of each support pile 1-1 exceeds the bottom end of the surface layer 1-5 for a certain distance. In this embodiment, the support piles 1-1 are made of PPR plates.
The waist beams 1-2 are distributed at intervals along the height direction of the surface layer 1-5, and the waist beams 1-2 are distributed on the surface of one side of the surface layer 1-5; the supporting piles 1-1 are arranged on the other side of the surface layer 1-5; and the support piles 1-1 are perpendicular to the wale 1-2. In the embodiment, the wale is made of a PVC plate.
The U-shaped bolts 2-2 are arranged at intervals along the length direction of the support piles 1-1, and the number of the U-shaped bolts 2-2 installed on each support pile 1-1 is the same as that of the wale 1-2. The U-shaped opening end of the U-shaped bolt 2-2 is provided with threads, the threads sequentially penetrate through the surface layer 1-5 and the waist beam 1-2 and are fixed through the nut 1-6, and the closed end of the U-shaped bolt 2-2 is rotatably connected with the soil nail 1-3; the connection of the soil nails 1-3 with the support piles 1-1 and the surface layers 1-5 is realized through U-shaped bolts 2-2. The waist beam 1-2 and the surface layer 1-5 are fixed through the U-shaped bolt 2-2, and the whole stress process of the waist beam, the surface layer and the pile can be effectively simulated.
Further, as shown in fig. 4, one end of the soil nail 1-3 is connected with the U-shaped bolt 2-2 through a pin 3-1, so that the soil nail 1-3 can rotate relative to the U-shaped bolt 2-2; the displacement of the soil nails 1-3 in the excavation process of the foundation pit can not be limited through the connection of the pins 3-1, and the excavation process of the foundation pit can be truly simulated. In the embodiment, the soil nails 1-3 are made of PVC pipes, and the materials of all the parts are selected according to the similar theory by considering the mechanics and deformation characteristics.
The steps of performing the model test in this example are:
(1) respectively manufacturing a support pile 1-1, a soil nail 1-3, a surface layer 1-5, a waist beam 1-2 and a crown beam 1-4.
(2) Fixing the manufactured surface layer 1-5 in a model box, fixing the crown beam 1-4 on the top of the surface layer 1-5 through a pretightening force bolt 2-1, and inserting the support pile 1-1 into a hole reserved on the top of the crown beam 1-4.
(3) The supporting piles 1-1, the crown beams 1-4 and the surface layers 1-5 are fixed together through U-shaped bolts 2-2.
(4) And connecting the manufactured soil nail 1-3 with the U-shaped bolt 2-2 through the pin 3-1.
(5) Burying the test soil body in the model box until the test soil body is flush with the top surface of the model box; and (5) after standing for 24 hours, beginning soil excavation.
(6) Excavating the soil body in the model box step by step, firstly excavating to the position of a first row of soil nails 1-3, when the displacement of the whole model system tends to be stable, excavating to the position of a second row of soil nails 1-3, and so on, and excavating to the position of a substrate step by step; therefore, the deformation characteristics of the foundation pit under the support pile-soil nail-surface layer combined system and the stress mechanism of the support pile-soil nail-surface layer can be simulated. And obtaining required internal force and displacement data through the displacement monitoring device and the strain testing device.
In the embodiment, each component can accurately play a role through a reasonable component connection mode, and the action mechanism of the pile-soil nail-surface layer combined supporting system can be obtained by observing the displacement change rule of the foundation pit excavation surface layer and the surrounding soil body and the internal force change of the pile-soil nail-surface layer under different intervals of the soil nails 1-3 and the supporting piles 1-1. The embodiment has better adaptability to pile-soil nail-surface layer combined supporting systems with various scales; the components are connected and operated conveniently, are easy to disassemble and are convenient for repeated tests.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A combined supporting system for a model test is characterized by comprising a surface layer, supporting piles and soil nails, wherein the top of the surface layer is detachably connected with a crown beam, and a plurality of supporting piles penetrate through the crown beam and are arranged along the length direction of the crown beam; the supporting piles are positioned on one side of the surface layer and are parallel to the surface layer, and a plurality of waist beams are arranged on the other side of the surface layer at intervals along the height direction of the surface layer; the support piles are connected with the surface layer and the waist beam through U-shaped bolts, and the U-shaped bolts are rotatably connected with the soil nails.
2. The combined supporting system for the model test according to claim 1, wherein a plurality of holes are reserved at the top of the crown beam, and supporting piles penetrate through the holes.
3. The combined supporting system for the model test according to claim 2, wherein the crown beam is connected with the surface layer through a plurality of pretightening bolts.
4. The combined supporting system for the model test according to claim 3, wherein the head of the pretightening bolt is installed towards one side of the surface layer away from the supporting pile.
5. The combined supporting system for the model test according to claim 1, wherein the crown beam comprises a first side plate and a second side plate which are perpendicular to each other, the first side plate is attached to the surface layer, and the top surface of the surface layer is attached to the surface of the second side plate.
6. The combined supporting system for the model test according to claim 5, wherein the crown beam is made of angle steel.
7. The combined supporting system for the model test according to claim 1, wherein the soil nails are connected with the closed ends of the U-shaped bolts through pins.
8. The combined supporting system for the model test according to claim 1 or 7, wherein a plurality of the soil nails are distributed at intervals along the height direction of the supporting piles, and the number of the soil nails connected with each supporting pile is the same as that of the wales.
9. The combined supporting system for the model test according to claim 1, wherein the supporting piles are perpendicular to the wale.
10. The combined supporting system for the model test is characterized in that the surface layer is made of PVC (polyvinyl chloride) plates, the soil nails are made of PVC pipes, the waist beams are made of PVC plates, and the supporting piles are made of PPR (polypropylene random) pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022714977.3U CN213709650U (en) | 2020-11-19 | 2020-11-19 | Combined supporting system for model test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022714977.3U CN213709650U (en) | 2020-11-19 | 2020-11-19 | Combined supporting system for model test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213709650U true CN213709650U (en) | 2021-07-16 |
Family
ID=76785205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022714977.3U Active CN213709650U (en) | 2020-11-19 | 2020-11-19 | Combined supporting system for model test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213709650U (en) |
-
2020
- 2020-11-19 CN CN202022714977.3U patent/CN213709650U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110261235B (en) | Fracture surrounding rock anchoring performance damage testing device and testing method | |
| CN206512764U (en) | A kind of horizontally loading test system for applying vertical load in stake top | |
| KR100941967B1 (en) | Apparatus for horizontal pile load test and method thereof | |
| CN111912724B (en) | Similar simulation test method for large-deformation anchor rod roadway support design | |
| EP2648020B1 (en) | Earthquake monitoring device and installation method thereof | |
| CN103471941A (en) | Anchor rod shock resistance simulation test system | |
| Astaneh-Asl et al. | Seismic performance of steel bridges during the 1994 Northridge earthquake | |
| CN109026106A (en) | The working condition simulation method and Work condition analogue testing stand of Bolt System | |
| CN109269743A (en) | A kind of ground seismic wave function lower bolt dynamic pull-out test device and test method | |
| KR20180035427A (en) | Apparatus for pile load test | |
| CN213709650U (en) | Combined supporting system for model test | |
| CN208934726U (en) | The Work condition analogue testing stand of Bolt System | |
| CN112227433B (en) | Model test device and test method for pile foundation bearing capacity during fault zone dislocation | |
| CN112482393A (en) | Pile-soil nail-surface layer combined supporting system and using method thereof | |
| CN215296993U (en) | Multi-connected rock-soil in-situ shear testing device for full-stress path tracking | |
| Abdullah et al. | Soil-structure interaction of integral abutments | |
| CN115508069A (en) | Comprehensive evaluation method for dynamic and static mechanical properties of anchor cable | |
| CN216816041U (en) | Vertical observable structural column antiknock test device | |
| KR200286390Y1 (en) | The connecting structure of maintained-load test device | |
| CN111912711B (en) | Comprehensive model groove system for structure quasi-static test | |
| Su et al. | Influence of Construction Sequence on the Force Characteristics of Foundation Pit Support Structure | |
| CN113006084A (en) | Construction method and dynamic design method of support-free foundation pit supporting system | |
| CN214844044U (en) | Test device for simulating cavity behind lining of shield tunnel | |
| Hulagabali et al. | Influence of supporting systems on behavior of mse wall | |
| CN215262868U (en) | Rock mass deformation test device suitable for face spacious face |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |