CN212031485U - Simulation test device for influence of foundation deformation in large-area concrete construction and maintenance process - Google Patents
Simulation test device for influence of foundation deformation in large-area concrete construction and maintenance process Download PDFInfo
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- CN212031485U CN212031485U CN202020441995.6U CN202020441995U CN212031485U CN 212031485 U CN212031485 U CN 212031485U CN 202020441995 U CN202020441995 U CN 202020441995U CN 212031485 U CN212031485 U CN 212031485U
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Abstract
The utility model belongs to the technical field of civil engineering intellectual detection system monitoring technology and specifically relates to a large tracts of land concrete construction and maintenance process ground warp and influence analogue test device, be provided with simulation foundation soil layer in the experimental model case, simulation foundation soil layer sets up inside the box frame of experimental model case, the concrete can be accepted to simulation foundation soil layer's top, the bottom plate at the box frame of experimental model case is the adjustable bottom plate of vertical displacement, be provided with spiral stroke adjuster and vertical displacement measuring device in the below of the adjustable bottom plate of vertical displacement, spiral stroke adjuster links to each other with the adjustable bottom plate of vertical displacement and can make the adjustable bottom plate of vertical displacement produce vertical displacement, vertical displacement measuring device is used for measuring spiral stroke adjuster's action stroke. The utility model has the advantages that: the foundation deformation influence in large-area concrete construction and maintenance process can be accurately simulated, reference is provided for actual construction, and the precision is high.
Description
Technical Field
The utility model belongs to the technical field of civil engineering intellectual detection system monitoring technique and specifically relates to a large tracts of land concrete construction and maintenance process ground warp and influence analogue test device.
Background
At present, the construction quality is often the key to the non-leakage construction technical problem of large-area concrete structure of soft soil foundation. Due to the soil body characteristic of the soft soil foundation, the settlement of the soft soil foundation is generally large, and after a large-area concrete structure is constructed, concrete structures in different ages are subjected to deformation due to the settlement of the soft soil foundation, and cracks or even fractures can be generated when the concrete structures are serious, so that the leakage of the concrete structures is caused. However, there is no good way to deal with the existing construction, because the soil characteristics of the soft soil foundation in which the project is located are different, and even a small difference will have a great influence on the degree of deformation of the concrete structure.
Disclosure of Invention
The utility model aims at providing a not enough according to above-mentioned prior art, a large tracts of land concrete construction and maintenance process ground warp and influence analogue test device is provided, design cooperation deformation analogue means through experimental model case, artificial intervention implements ground difference settlement simulation condition, make different instar concretes receive the deformation, survey under the various different test conditions, concrete crack development state, internal damage and crack occurrence and distribution, the change of the inside micro-structure of concrete, thereby research send the mechanism of splitting and propose taking precautions against the cracked construction method of deformation.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides a large tracts of land concrete construction and maintenance process foundation warp influences analogue test device which characterized in that: the device comprises a test model box, wherein a simulation foundation soil layer is arranged in the test model box, the simulation foundation soil layer is arranged inside a box body frame of the test model box, concrete can be accepted above the simulation foundation soil layer, a bottom plate of the box body frame of the test model box is a vertical displacement adjustable bottom plate, a spiral stroke regulator and a vertical displacement measuring device are arranged below the vertical displacement adjustable bottom plate, the spiral stroke regulator is connected with the vertical displacement adjustable bottom plate and can enable the vertical displacement adjustable bottom plate to generate vertical displacement, and the vertical displacement measuring device is used for measuring the action stroke of the spiral stroke regulator.
The box body frame of the test model box consists of a plurality of stand columns, steel beams, fixed cross beams, vertical adjustable cross beams and vertical displacement adjustable bottom plates, wherein the stand columns are arranged and fixed above the vertical displacement adjustable bottom plates at intervals, the transverse directions of the stand columns are connected and fixed through the steel beams, the longitudinal directions of the stand columns are connected through the fixed cross beams, and the steel beams are connected through the vertical adjustable cross beams; the vertical adjustable cross beam is connected with the vertical displacement adjustable bottom plate, a displacement adjusting bolt hole is formed in the vertical displacement adjustable bottom plate, and the displacement adjusting bolt hole is used for connecting the spiral stroke adjuster; the side surfaces of the upright posts are sealed by toughened glass.
The simulated foundation soil layer comprises a sponge and a dry sand cushion layer, wherein the sponge is laid at the bottom of the test model box, and the dry sand cushion layer is laid above the sponge.
And a support column is arranged at the bottom of the test model box.
The vertical displacement measuring device is a resistance type displacement sensor.
The utility model has the advantages that: the foundation deformation influence in large-area concrete construction and maintenance processes can be accurately simulated, reference is provided for actual construction, and the precision is high; the manufacturing is convenient and simple, the multiplexing is convenient, the simple parameter adjustment can be carried out according to different working conditions, and the accurate simulation is realized.
Drawings
Fig. 1 is a schematic view of the arrangement structure of the present invention;
FIG. 2 is a schematic cross-sectional structure diagram of an experimental model box according to the present invention;
FIG. 3 is a schematic structural diagram of a test model box according to the present invention;
fig. 4 is the structure diagram of the device for adjusting and measuring the settlement displacement by simulating in the utility model.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, the respective symbols 1-16 in the figures are respectively represented as: the device comprises a test model box 1, a settlement displacement adjusting point 2, a concrete layer 3, a sand cushion layer 4, a sponge cushion layer 5, a spiral type stroke adjuster 6, a support column 7, a stand column 8, a steel beam 9, a fixed cross beam 10, a vertical adjustable cross beam 11, a displacement adjusting bolt hole 12, a vertical displacement adjustable bottom plate 13, a stroke adjuster fixing device 14, a resistance type displacement sensor 15 and a displacement meter fixing device 16.
Example (b): as shown in fig. 1, the main body of the simulation test device for the influence of foundation deformation during the construction and maintenance of large-area concrete in this embodiment includes a test model box 1, and the test model box 1 can be used for constructing a concrete test model, that is, the test model box 1 serves as a main body for simulating large-area concrete. The settlement displacement adjusting points 2 are arranged at the bottom of the test model box 1 at intervals, the settlement displacement adjusting points 2 act on the test model box 1 to perform manual intervention on the simulated large-area concrete, so that foundation differential settlement simulation is implemented, the deformation of the large-area concrete in the test model box 1 in different ages is analyzed, the crack development state, internal damage, crack occurrence and distribution and the change of the internal microstructure of the concrete under different test conditions are observed, the crack generation mechanism is researched, the construction method for preventing deformation cracks is provided, and the simulation test significance is realized.
Specifically, as shown in fig. 2, a simulated foundation soil layer is arranged inside the test model box 1, and the simulated foundation soil layer is composed of a sponge cushion 5 and a sand cushion 4, wherein the sponge cushion 5 is laid at the bottom of the test model box 1, and the sand cushion 4 is laid above the sponge cushion 5; the combination of the two can accept the concrete layer 3, and the sponge cushion layer 5 and the sand cushion layer 4 have good ventilation and heat dissipation properties, thereby avoiding cracks caused by hydration heat of concrete in the pouring process.
As shown in fig. 2, a supporting column 7 is arranged at the bottom fulcrum position of the test model box 1, and the supporting column 7 supports the test model box 1 to a certain height to meet the installation height requirement of the spiral stroke adjuster 6. The spiral stroke regulator 6 is used as an implementation component for foundation differential settlement simulation, and can apply a jacking force to the test model box 1 in a jacking manner so as to simulate foundation differential settlement; the differential foundation settlement means that the settlement amount at the position where the screw type stroke controller 6 is installed (i.e., the settlement displacement control point 2) is different from the settlement amount at the remaining positions in the lateral direction of the test model box 1 shown in fig. 1, thereby simulating differential foundation settlement.
Referring to the top view of the test model box 1 shown in fig. 3, the test model box 1 is composed of vertical columns 8, steel beams 9, fixed beams 10, vertically adjustable beams 11, displacement adjusting bolt holes 12 and vertically displacement adjustable bottom plates 13, wherein the vertical columns 8 are vertical supporting bodies which are arranged at intervals to form the box body outline of the test model box 1, the horizontal vertical columns 8 along the test model box 1 are connected and fixed through the steel beams 9 to form a whole, and the vertical columns 8 along the longitudinal direction of the test model box 1 are connected and fixed through the fixed beams 10 to form a whole. The periphery of the test model box 1 is sealed by toughened glass.
As shown in fig. 3, two rows of adjacent steel beams 9 are connected into a whole by a vertical adjustable beam 11, the vertical adjustable beam 11 can move up and down in the beam body range of the steel beam 9, and the two beams can be movably connected by adopting sliding fit or rolling fit modes such as a rail, a tongue-and-groove and the like. The arrangement positions of the vertical adjustable cross beams 11 and the arrangement positions of the fixed cross beams 10 are arranged at intervals along the transverse direction of the test model box 1 and are arranged in a staggered manner along the height direction of the test model box 1. The plurality of vertical adjustable cross beams 11 are connected with a vertical displacement adjustable bottom plate 13, and displacement adjusting bolt holes 12 corresponding to the arrangement positions of the spiral stroke adjusters 6 are formed in the vertical displacement adjustable bottom plate 13 and used for installing the spiral stroke adjusters 6.
As shown in fig. 4, the screw type stroke adjuster 6 is mounted and fixed by a stroke adjuster fixing device 14 and aligned with the position of the displacement adjusting bolt hole 12 on the vertical displacement adjustable base plate 13. The spiral stroke regulator 6 is connected with a resistance type displacement sensor 15, the resistance type displacement sensor 15 is used for measuring the pushing stroke of the spiral stroke regulator 6 so as to reflect the settlement amount of the simulated foundation differential settlement, and the resistance type displacement sensor 15 is fixedly installed through a displacement meter fixing device 16.
In the embodiment, in specific implementation: in the maintenance process, according to the condition of experimental design, the spiral stroke regulator 6 is regulated for concrete in different areas when the days of the maintenance period are regulated.
Considering the difference between the spatial distribution form of the foundation deformation and the displacement of the settlement peak, the simulation test device in this embodiment can obtain a three-dimensional curved function through mathematical regression for any foundation settlement form, and then adjust the screw-type stroke adjuster 6 (meeting the condition of a certain point density) according to the settlement displacement value of the foundation at the corresponding point of the function, so as to obtain the spatial distribution state of the foundation settlement meeting the actual engineering requirements.
For the foundation settlement state in any three-dimensional curved surface form, a Gaussian interpolation method is adopted through a given curved surface function (assumed to be known or obtained according to engineering geology and other foundation detection results), the coordinates of Gaussian points are solved, and the vertical displacement of the Gaussian points is calculated according to the curved surface function and is used as the simulated applied displacement of model control points, so that the foundation settlement and the influence of the foundation settlement on model concrete are simulated.
When the simulation test device in the embodiment is used, firstly, the settlement type and the maximum settlement amount of the foundation in the engineering area to be simulated are determined according to the actual engineering site (engineering geology, hydrogeology and foundation investigation result data), and a settlement simulation surface function is established.
Selecting a proper place, manufacturing a test model box 1 with the same certain proportion and similar geometry, laying a sponge and a soft bottom layer of a dry sand cushion layer to simulate a foundation soil layer, laying a sand cushion layer 4 and a sponge cushion layer 5 in the test model box 1, and taking the parameters of the type, the number of layers, the thickness and the like of the laid simulated foundation soil layer as reference to simulate the condition in an actual construction place and ensuring that the concrete is not influenced by hydration and overheating after being poured as far as possible.
And calculating and determining the coordinate position of the displacement control point (Gaussian interpolation point) of the simulated curved surface and the corresponding vertical displacement value thereof as the basis of unique simulation regulation and control. And a plurality of spiral stroke regulators 6 are arranged at corresponding points below the test model box 1 according to design requirements and are connected with the resistance type displacement sensors 15 one by one to read initial readings.
And then, pouring a concrete layer 3 (installing simulation steel bars if necessary) above the simulation foundation soil layer in the test model box 1, vibrating the concrete by using an electric vibrator until the concrete is compact and uniform, and curing the concrete to the simulation settlement age according to the construction specification. In the simulation test, the concrete layer 3 is an actual test object to analyze the influence of the deformation of the foundation during the construction and maintenance processes.
Vertical displacement values of all control points are set according to a displacement curved surface, the spiral stroke regulator 6 is regulated to a set displacement value, the vertical displacement is kept unchanged, and the concrete layer 3 is maintained to be full of age for later internal quality detection and analysis, so that the concrete layer is deformed at different ages, the crack development state, internal damage, crack occurrence and distribution and the change of the internal microstructure of the concrete under different test conditions are observed, the cracking mechanism is researched, the construction method for preventing the deformation cracks is provided, and the simulation test significance is realized.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description thereof is not repeated herein.
Claims (5)
1. The utility model provides a large tracts of land concrete construction and maintenance process foundation warp influences analogue test device which characterized in that: the device comprises a test model box, wherein a simulation foundation soil layer is arranged in the test model box, the simulation foundation soil layer is arranged inside a box body frame of the test model box, concrete can be accepted above the simulation foundation soil layer, a bottom plate of the box body frame of the test model box is a vertical displacement adjustable bottom plate, a spiral stroke regulator and a vertical displacement measuring device are arranged below the vertical displacement adjustable bottom plate, the spiral stroke regulator is connected with the vertical displacement adjustable bottom plate and can enable the vertical displacement adjustable bottom plate to generate vertical displacement, and the vertical displacement measuring device is used for measuring the action stroke of the spiral stroke regulator.
2. The large-area concrete construction and maintenance process foundation deformation influence simulation test device according to claim 1, characterized in that: the box body frame of the test model box consists of a plurality of stand columns, steel beams, fixed cross beams, vertical adjustable cross beams and vertical displacement adjustable bottom plates, wherein the stand columns are arranged and fixed above the vertical displacement adjustable bottom plates at intervals, the transverse directions of the stand columns are connected and fixed through the steel beams, the longitudinal directions of the stand columns are connected through the fixed cross beams, and the steel beams are connected through the vertical adjustable cross beams; the vertical adjustable cross beam is connected with the vertical displacement adjustable bottom plate, a displacement adjusting bolt hole is formed in the vertical displacement adjustable bottom plate, and the displacement adjusting bolt hole is used for connecting the spiral stroke adjuster; the side surfaces of the upright posts are sealed by toughened glass.
3. The large-area concrete construction and maintenance process foundation deformation influence simulation test device according to claim 1, characterized in that: the simulated foundation soil layer comprises a sponge and a dry sand cushion layer, wherein the sponge is laid at the bottom of the test model box, and the dry sand cushion layer is laid above the sponge.
4. The large-area concrete construction and maintenance process foundation deformation influence simulation test device according to claim 1, characterized in that: and a support column is arranged at the bottom of the test model box.
5. The large-area concrete construction and maintenance process foundation deformation influence simulation test device according to claim 1, characterized in that: the vertical displacement measuring device is a resistance type displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020441995.6U CN212031485U (en) | 2020-03-31 | 2020-03-31 | Simulation test device for influence of foundation deformation in large-area concrete construction and maintenance process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020441995.6U CN212031485U (en) | 2020-03-31 | 2020-03-31 | Simulation test device for influence of foundation deformation in large-area concrete construction and maintenance process |
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| CN212031485U true CN212031485U (en) | 2020-11-27 |
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| CN202020441995.6U Active CN212031485U (en) | 2020-03-31 | 2020-03-31 | Simulation test device for influence of foundation deformation in large-area concrete construction and maintenance process |
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| CN (1) | CN212031485U (en) |
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