CN216766025U - Model test device for researching mutual influence of existing building and foundation pit excavation - Google Patents
Model test device for researching mutual influence of existing building and foundation pit excavation Download PDFInfo
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- CN216766025U CN216766025U CN202220259551.XU CN202220259551U CN216766025U CN 216766025 U CN216766025 U CN 216766025U CN 202220259551 U CN202220259551 U CN 202220259551U CN 216766025 U CN216766025 U CN 216766025U
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Abstract
The utility model discloses a model test device for researching the mutual influence of an existing building and foundation pit excavation, which has the characteristics that: the model box is cuboid and at least provided with a box main body, the periphery and the bottom of the box main body are closed, and the top surface of the box main body is provided with an opening; the existing building foundation model is arranged inside the left side of the model box; the underground continuous wall model is arranged inside the right side of the model box; the supporting component is detachably and conveniently excavated and installed on the side of the foundation pit and comprises an aluminum alloy plate detachably arranged on the inner wall of the right side of the model box; the transverse support model is fixed between the underground diaphragm wall model and the detachable convenient excavation and installation support assembly at the side of the foundation pit and is used for fixing the underground diaphragm wall model; the counter-force support is fixed at the top of the model box, and an inverted jack is fixed at the bottom of the counter-force support and used for providing load to be supported on the existing building foundation model; and the displacement meter bracket is fixed at the top of the model box and used for placing the displacement meter.
Description
Technical Field
The utility model relates to the field of foundation pits in urban underground space development and underground building engineering, in particular to a model test device for researching the mutual influence of existing buildings and foundation pit excavation.
Background
The model test aiming at the influence of the foundation pit excavation on the surrounding environment is roughly divided into a foundation pit excavation test with loading and unloading and a foundation pit excavation test without loading and unloading. The model box manufactured based on the foundation pit excavation test without loading and unloading is difficult to disassemble and replace the support connected with the wall plate of the model box because most of the model box is sealed on four sides, and the sealed wall plate is inconvenient for foundation pit excavation. The model boxes manufactured based on the foundation pit excavation experiment with loading and unloading are mostly loaded by adopting a stacking method, so that the designed size of the model boxes is large, a large amount of manpower and material resources are consumed, the settlement of the building side cannot be monitored, and the grading unloading cannot be controlled by most model boxes. At present, no model test device specially used for researching the mutual influence between the 'unloading-loading' process of the existing building and the excavation of the foundation pit exists at home and abroad.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve the above problems, and an object of the present invention is to provide a model test apparatus for studying the mutual influence between an existing building and excavation of a foundation pit.
The utility model provides a model test device for researching the mutual influence of an existing building and foundation pit excavation, which has the characteristics that: the model box is cuboid and at least provided with a box main body, the periphery and the bottom of the box main body are closed, and the top surface of the box main body is provided with an opening; the existing building foundation model is arranged inside the left side of the model box; the underground continuous wall model is arranged inside the right side of the model box; the supporting component is detachably and conveniently excavated and installed on the side of the foundation pit and comprises an aluminum alloy plate detachably arranged on the inner wall of the right side of the model box; the transverse support model is fixed between the underground diaphragm wall model and the detachable convenient excavation and installation support assembly at the side of the foundation pit and is used for fixing the underground diaphragm wall model; the counter-force support is fixed at the top of the model box, and an inverted jack is fixed at the bottom of the counter-force support and used for providing load to be supported on the existing building foundation model; and the displacement meter bracket is fixed at the top of the model box and used for placing the displacement meter.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: the box body comprises an outer frame, tempered organic glass and a bottom plate, the outer frame is formed by splicing a plurality of aluminum profile components through bolts, the bottom plate is formed by splicing aluminum alloy plates, and the tempered organic glass is arranged around the outer frame.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: wherein, the anchor eye is all reserved to a plurality of aluminium alloy subassemblies at model case top for fixed reaction support and displacement meter support.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: wherein, the underground continuous wall model is made of aluminum alloy materials.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: wherein, the aluminium alloy plate that convenient excavation and installation supporting component can be dismantled to the foundation ditch side punches to it is fixed with horizontal support model connection.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: the transverse supporting model is composed of four transverse supporting pieces, and the transverse supporting pieces are all made of aluminum alloy pipes.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: wherein, the bottom of counter-force support is provided with reserve anchor eye for fixed jack.
The model test device for researching the mutual influence between the existing building and the foundation pit excavation, provided by the utility model, can also have the following characteristics: wherein, the quantity of displacement meter support is a plurality of, and the movably setting of displacement meter is on the displacement meter support.
Action and effect of the utility model
According to the model test device for researching the mutual influence of the existing building and the foundation pit excavation, the model test device comprises: the model box is cuboid and at least provided with a box main body, the periphery and the bottom of the box main body are closed, and the top surface of the box main body is provided with an opening; the existing building foundation model is arranged inside the left side of the model box; the underground continuous wall model is arranged inside the right side of the model box; the supporting component is detachably and conveniently excavated and installed on the side of the foundation pit and comprises an aluminum alloy plate detachably arranged on the inner wall of the right side of the model box; the transverse support model is fixed between the underground diaphragm wall model and the detachable convenient excavation and installation support assembly at the side of the foundation pit and is used for fixing the underground diaphragm wall model; the counter-force support is fixed at the top of the model box, and an inverted jack is fixed at the bottom of the counter-force support and used for providing load to be supported on the existing building foundation model; and the displacement meter bracket is fixed at the top of the model box and used for placing the displacement meter.
Therefore, the model test device for researching the mutual influence of the existing building and the foundation pit excavation is a model box which is visible on four sides, can be disassembled on the side wall plate of the foundation pit and is provided with a counterforce support, the soil body settlement and the deformation of a supporting structure can be clearly observed through a visualization module, the foundation pit excavation and the supporting erection can be conveniently realized through disassembling the wall plate, and the unloading-loading simulation of the updating and the reconstruction of the existing building can be conveniently realized through a jack connected with the counterforce support.
In addition, layered filling can be placed in the model box, so that the model box is used for restoring and simulating the geological condition in the actual engineering, the simulation of different excavation sequences and support arrangement of the foundation pit under the condition of 'unloading-loading' of the existing building is realized, the longitudinal settlement of the soil layer around the building and the displacement deformation of the underground continuous wall model and the support model are accurately and visually measured, and the analysis is carried out.
Finally, the method simulates the settlement of surrounding strata and the deformation of a foundation pit excavation supporting structure caused by 'unloading-loading' in the reconstruction of the existing building, explores the disturbance mechanism of the update and reconstruction 'unloading-loading' process of the urban large public building to the surrounding environment, researches the structural response and damage mechanism of the surrounding adjacent existing facilities under the 'unloading-loading' action and the influence of foundation pit excavation on the pile foundation of the existing building group, and has important value for the disturbance mechanism and the comprehensive evaluation system of regional safety and the active and passive cooperative protection technology of the large public building and the adjacent existing facilities in the update and reconstruction process of the urban large public building.
Drawings
FIG. 1 is a perspective view of a model testing apparatus for studying the interaction between an existing building and excavation of a foundation pit in an embodiment of the present invention;
FIG. 2 is a top view of a model test device for researching the interaction between an existing building and foundation pit excavation and a schematic diagram of arrangement points of a displacement meter and a supporting strain gauge in the embodiment of the utility model; and
fig. 3 is a front view of a model test device for researching the interaction between an existing building and foundation pit excavation and a schematic diagram of arrangement points of a displacement meter and a support strain gauge in the embodiment of the utility model.
Detailed Description
In order to make the technical means, creation features, achievement purposes and effects of the present invention easy to understand, the following embodiments specifically describe a model test apparatus for researching the mutual influence between the existing building and the excavation of the foundation pit with reference to the attached drawings.
Fig. 1 is a perspective view of a model test apparatus for investigating the interaction between an existing building and excavation of a foundation pit in this embodiment.
Fig. 2 is a plan view of the model test apparatus for studying the interaction between the existing building and the excavation of the foundation pit and a schematic diagram of arrangement points of the displacement gauge and the support strain gauge in this embodiment.
Fig. 3 is a front view of the model testing apparatus for studying the interaction between the existing building and the excavation of the foundation pit and a schematic diagram of arrangement points of the displacement meter and the support strain gauge in this embodiment.
As shown in fig. 1 to 3, a model test apparatus 100 for studying the interaction between an existing building and excavation of a foundation pit according to the present embodiment includes a model box 10, an existing building foundation model 20, an underground diaphragm wall model 30, a detachable convenient excavation and installation support assembly 40 on the foundation pit side, a lateral support model 50, a reaction force bracket 60, and a displacement gauge bracket 70.
First, a model box 10, an existing building foundation model 20 and a pile foundation thereof, an underground diaphragm wall model 30, a reaction bracket 60 and associated jacks and hydraulic pumps, 4 transverse support assemblies 51 of two specifications, a displacement gauge bracket 70, a plurality of displacement gauges 71, a plurality of strain gauges 52, and a plurality of soil pressure boxes are manufactured.
The mold box 10 is a square body having a box main body whose periphery and bottom are closed and whose top surface is opened. Layered filling soil can be placed in the box main body and used for restoring and simulating the actual geological condition of the engineering.
The box main part includes outer frame, tempering organic glass and bottom plate, and outer frame is formed through the bolt concatenation by a plurality of aluminium alloy subassemblies, and the bottom plate is formed by the aluminium alloy plate concatenation, sets up tempering organic glass around outer frame.
A plurality of aluminum profile components on the top of the model box 10 are all reserved with anchor holes for fixing the counter-force bracket 60 and the displacement meter bracket 70.
The existing building foundation model 20 is arranged inside the left side of the model box 10, and the piles and the existing building foundation model 20 are directly fixed through screw connection.
And an underground diaphragm wall model 30 disposed inside the right side of the model case 10. The underground diaphragm wall model 30 is made of an aluminum alloy material. It opens 4 bolt holes on the right side and can dismantle convenient excavation and install 4 bolt hole fixed transverse braces on the supporting component 40 with the foundation ditch side.
Convenient excavation and installation supporting component 40 can be dismantled to foundation ditch side, including three aluminium alloy plate that detachably set up on the right side inner wall of mold box 10, aluminium alloy plate passes through mold box 10 wall dismantlements, conveniently realizes soil body excavation simulation and foundation ditch inner support construction. The aluminum alloy plate is perforated to be fixedly connected to the lateral supporting mold 50.
The transverse supporting model 50 is fixed between the underground diaphragm wall model 30 and the supporting component 40 which can be disassembled and conveniently excavated and installed at the side of the foundation pit, and is used for fixing the underground diaphragm wall model 30.
The lateral support model 50 is composed of four lateral supports 51, and the lateral supports 51 are made of aluminum alloy pipes. A plurality of strain gauges 52 are mounted on the lateral support 51.
The arrangement of the strain gage in this embodiment is shown in fig. 2 and 3, with the small squares in fig. 2 and 3 representing the strain gage 52.
The reaction support 60 is fixed on the top of the model box 10, the bottom of the reaction support 60 is provided with a reserved anchor hole, and an inverted jack is fixed on the reaction support for providing load to be loaded and supported on the existing building foundation model 20 and loading and unloading the existing building foundation model 20.
And a displacement meter support 70 fixed on the top of the mold box 10 for placing a displacement meter 71. The displacement meter supports 70 are multiple in number, the displacement meters 71 are movably arranged on the displacement meter supports 70, each displacement meter 71 is fixed in the horizontal direction and can be changed in the vertical direction, and therefore settlement measurement of the earth surface and the inner part of the stratum can be achieved when multiple groups of displacement meters 71 penetrate into different depths of the earth layer. The displacement meter 71 is fixed by combining an aluminum alloy vertical optical axis support frame and aluminum alloy section steel. The displacement meter 71 is fixed on the displacement meter support 70 by adopting a magnetic attraction support, and the displacement meter can move on the displacement meter support 70.
The arrangement of the displacement meter 71 in the present embodiment is shown in fig. 2 and 3, and the circle in fig. 2 and 3 represents the displacement meter 71.
Before use, test soil samples are filled into the model box 10, the underground continuous wall model 30 is placed at a set position, and the bottom surface of the underground continuous wall and the soil layer are kept horizontal under the control of the leveling rod.
According to the required simulated excavation working condition, the load is applied to the building through the oil pressure pushing of the hydraulic pump, the unloading is controlled by the universal pressure maintaining ball valve, and the foundation pit side wall plate is disassembled according to the concrete foundation pit excavation working condition to carry out the alternation of foundation pit excavation and support dismantling.
Effects and effects of the embodiments
According to the model test apparatus for researching the interaction between the existing building and the excavation of the foundation pit, the apparatus comprises: the model box is cuboid and at least provided with a box main body, the periphery and the bottom of the box main body are closed, and the top surface of the box main body is provided with an opening; the existing building foundation model is arranged inside the left side of the model box; the underground continuous wall model is arranged inside the right side of the model box; the supporting component is detachably and conveniently excavated and installed on the side of the foundation pit and comprises an aluminum alloy plate detachably arranged on the inner wall of the right side of the model box; the transverse supporting model is fixed between the underground diaphragm wall model and the detachable convenient excavation and installation supporting component at the side of the foundation pit and used for fixing the underground diaphragm wall model; the counter-force support is fixed at the top of the model box, and an inverted jack is fixed at the bottom of the counter-force support and used for providing load to be supported on the existing building foundation model; and the displacement meter bracket is fixed at the top of the model box and used for placing the displacement meter.
Therefore, the model test device for researching the mutual influence of the existing building and the foundation pit excavation in the embodiment is a model box which is visible on four sides, can be disassembled on the side wall plate of the foundation pit and is provided with a counterforce support, the soil body settlement and the deformation of a supporting structure can be clearly observed through a visualization module, the foundation pit excavation and the supporting erection can be conveniently realized through the disassembly of the wall plate, and the simulation of 'unloading-loading' of the existing building updating and reforming can be conveniently realized through a jack connected with the counterforce support.
In addition, layered filling can be placed in the model box of the embodiment, the layered filling is used for restoring and simulating the geological condition in the actual engineering, the simulation of different excavation sequences and support arrangement of the foundation pit under the condition of unloading-loading of the existing building is realized, the longitudinal settlement of the soil layer around the building and the displacement deformation of the underground diaphragm wall model and the support model are accurately and visually measured, and the analysis is carried out.
Finally, the embodiment simulates the settlement of surrounding strata and the deformation of a foundation pit excavation supporting structure caused by 'unloading-loading' inside the reconstruction of the existing building, explores the disturbance mechanism of the update and reconstruction 'unloading-loading' process of the urban large public building to the surrounding environment, researches the structural response and damage mechanism of the surrounding adjacent existing facilities under the 'unloading-loading' action and the influence of foundation pit excavation on the pile foundation of the existing building group, and has important value for the disturbance mechanism and the comprehensive evaluation system of regional safety and the active and passive cooperative protection technology of the large public building and the adjacent existing facilities in the update and reconstruction process of the urban large public building.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (8)
1. The utility model provides a research existing building and foundation ditch excavation interact's model test device which characterized in that includes:
the model box is cuboid and at least provided with a box main body, the periphery and the bottom of the box main body are closed, and the top surface of the box main body is provided with an opening;
the existing building foundation model is arranged inside the left side of the model box;
the underground continuous wall model is arranged inside the right side of the model box;
the supporting component comprises an aluminum alloy plate which is detachably arranged on the inner wall of the right side of the model box;
the transverse support model is fixed between the underground diaphragm wall model and the supporting component which is detachably and conveniently excavated and installed on the side of the foundation pit and used for fixing the underground diaphragm wall model;
the counter-force support is fixed at the top of the model box, and an inverted jack is fixed at the bottom of the counter-force support and used for providing load to the existing building foundation model; and
and the displacement meter bracket is fixed at the top of the model box and used for placing a displacement meter.
2. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 1, wherein:
wherein, the case main part includes outer frame, tempering organic glass and bottom plate, outer frame is formed through the bolt concatenation by a plurality of aluminium alloy subassemblies, the bottom plate is formed by the aluminium alloy plate concatenation, outer frame set up all around tempering organic glass.
3. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 2, wherein:
and anchor holes are reserved in the plurality of aluminum profile components at the top of the model box and used for fixing the counter-force support and the displacement meter support.
4. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 1, wherein:
wherein, the underground continuous wall model is made of aluminum alloy materials.
5. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 1, wherein:
wherein, in convenient excavation and the installation supporting component can be dismantled to the foundation ditch side punch on the aluminium alloy plate, thereby with it is fixed to transversely support the model connection.
6. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 1, wherein:
the transverse supporting model is composed of four transverse supporting pieces, and the transverse supporting pieces are all made of aluminum alloy pipes.
7. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 1, wherein:
and a reserved anchor hole is formed in the bottom of the counter-force support and used for fixing the jack.
8. The model test device for researching the interaction between the existing building and the foundation pit excavation as claimed in claim 1, wherein:
the displacement meter comprises a displacement meter support and a displacement meter, wherein the number of the displacement meter supports is multiple, and the displacement meter is movably arranged on the displacement meter support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220259551.XU CN216766025U (en) | 2022-02-07 | 2022-02-07 | Model test device for researching mutual influence of existing building and foundation pit excavation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220259551.XU CN216766025U (en) | 2022-02-07 | 2022-02-07 | Model test device for researching mutual influence of existing building and foundation pit excavation |
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| CN216766025U true CN216766025U (en) | 2022-06-17 |
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| CN202220259551.XU Active CN216766025U (en) | 2022-02-07 | 2022-02-07 | Model test device for researching mutual influence of existing building and foundation pit excavation |
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| CN (1) | CN216766025U (en) |
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- 2022-02-07 CN CN202220259551.XU patent/CN216766025U/en active Active
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