CN111829911A - Performance measuring device for filling leveling layer on floating ground - Google Patents

Performance measuring device for filling leveling layer on floating ground Download PDF

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Publication number
CN111829911A
CN111829911A CN202010677304.7A CN202010677304A CN111829911A CN 111829911 A CN111829911 A CN 111829911A CN 202010677304 A CN202010677304 A CN 202010677304A CN 111829911 A CN111829911 A CN 111829911A
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China
Prior art keywords
filling
leveling layer
guide rod
floating ground
impact
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CN202010677304.7A
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CN111829911B (en
Inventor
张吉秀
张晔
吴为群
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Beijing Building Materials Academy of Sciences Research
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Beijing Building Materials Academy of Sciences Research
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0075—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by means of external apparatus, e.g. test benches or portable test systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/48—Investigating hardness or rebound hardness by performing impressions under impulsive load by indentors, e.g. falling ball
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/001—Impulsive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0076—Hardness, compressibility or resistance to crushing
    • G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
    • G01N2203/008—Residual indentation measurement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

Abstract

The embodiment of the invention relates to the technical field of floating ground, and provides a performance measuring device for filling a leveling layer on the floating ground. The performance testing device for filling the leveling layer on the floating ground provided by the embodiment of the invention comprises: the laser distance measuring device comprises an impact assembly, a laser distance measuring device and a laser distance measuring device, wherein the impact assembly is provided with the laser distance measuring device; a carrier assembly disposed at a bottom of the impact assembly; the data acquisition processor is electrically connected with the laser range finder, wherein the impact assembly can fall down along the vertical direction and collide with the bearing assembly and continuously rebound, and the data acquisition processor determines the rigidity of the floating ground filling leveling layer based on the rebound height value determined by the laser range finder. The performance testing device for the filling and leveling layer of the floating ground, provided by the embodiment of the invention, can simultaneously represent two performances of the rigidity of the filling and leveling layer and the mechanical property of the material of the filling and leveling layer, the method is simple and easy to implement, and the quality guarantee is provided for the construction of the floating ground.

Description

Performance measuring device for filling leveling layer on floating ground
Technical Field
The invention relates to the technical field of floating ground, in particular to a performance measuring device for a filling leveling layer of the floating ground.
Background
The floating ground is designed on the ground, and an isolation layer is adopted between the structural layer and the filling leveling layer, so that the filling leveling layer and the structural layer can be separated from each other to adapt to respective deformation, and the mutual restriction caused by different changes of the upper layer and the lower layer is reduced. The filling leveling layer has the performances of heat preservation and sound insulation.
Because the sound insulation layer between the filling leveling layer and the structural layer is usually soft elastic substances such as XPS, EPS and the like, the material performance and the thickness of the filling leveling layer have direct influence on the flexural rigidity. The bending rigidity determines the deformation capacity of the whole filling leveling layer under the action of bearing external load, and the filling leveling layer is easy to crack when the deformation is too large.
Therefore, the performance measuring device for the floating ground filling leveling layer is designed, the quality evaluation is carried out on the performance and the rigidity performance of the filling leveling layer material after the construction is finished, and the device is of great importance for ensuring the engineering quality of a floating ground system.
Disclosure of Invention
In order to solve the problems in the prior art, the embodiment of the invention provides a performance measuring device for filling a leveling layer on a floating ground.
According to one embodiment of the present invention, a device for measuring the filling level of a floating floor includes: the laser distance measuring device comprises an impact assembly, a laser distance measuring device and a laser distance measuring device, wherein the impact assembly is provided with the laser distance measuring device; a carrier assembly disposed at a bottom of the impact assembly; the data acquisition processor is electrically connected with the laser range finder, wherein the impact assembly can fall down along the vertical direction and collide with the bearing assembly and continuously rebound, and the data acquisition processor determines the rigidity performance of the floating ground filling leveling layer based on the rebound height value determined by the laser range finder.
According to one embodiment of the invention, the impact assembly comprises: the guide rod is marked with size scales on the outer side; the impact head is sleeved on the guide rod and can freely fall along the guide rod.
According to one embodiment of the invention, the bottom end of the impact head is configured as a circular arc-shaped tip.
According to one embodiment of the invention, the impact assembly further comprises: and the clamping fixer is arranged on the impact head so as to fix the impact head on different heights of the guide rod.
According to one embodiment of the invention, the laser rangefinder is mounted inside and outside the guide bar, and the measurement path of the laser rangefinder is parallel to the central axis of the guide bar.
According to one embodiment of the invention, the laser rangefinder is configured to measure a distance between a top of the guide bar to the carrier assembly and a distance between the top of the guide bar to a top of the impact head.
According to one embodiment of the invention, the load bearing assembly comprises: the pressure-bearing air bag is detachably arranged around the guide rod and is in contact with the outer wall of the guide rod.
According to an embodiment of the invention, the carrier assembly further comprises: bear the base, bear the base with the guide arm and the bottom of pressure-bearing gasbag can be dismantled and be connected.
According to one embodiment of the present invention, the apparatus for measuring the performance of a floating floor filling screed further comprises: the level gauge is installed at the top end of the guide rod so as to adjust the verticality of the guide rod.
According to one embodiment of the invention, the data acquisition processor is configured to receive each of the rebound height values measured by the laser rangefinder to plot a measured rebound curve and to compare the measured rebound curve to a standard rebound curve to determine the stiffness properties of the floating ground filling screed.
The performance testing device for the filling leveling layer of the floating ground, provided by the embodiment of the invention, provides a testing device for testing the rigidity and the loading force of the filling leveling layer on site in a nondestructive mode for the construction of the floating ground. The performance testing device for the filling and leveling layer of the floating ground, provided by the embodiment of the invention, can simultaneously represent two performances of the rigidity of the filling and leveling layer and the mechanical property of the material of the filling and leveling layer, is simple and easy to implement, and provides quality guarantee for the construction of the floating ground.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for measuring the filling level of a floating ground according to an embodiment of the present invention;
FIG. 2 is a graph comparing a standard rebound curve to a measured rebound curve.
Description of reference numerals:
1-a level meter; 2-laser range finder; 3-impact head; 4-a guide rod; 5-a pressure-bearing air bag; 6-carrying base; 7-data acquisition processor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, unless otherwise specified, "plurality", "plural groups" means two or more, and "several", "several groups" means one or more.
Referring now to fig. 1 and 2, embodiments provided by the present invention will be described. It should be understood that the following description is only exemplary embodiments of the present invention and does not constitute any particular limitation of the present invention.
In one embodiment of the present invention, as shown in FIG. 1, a device for measuring the performance of a floating floor filling screed comprises: an impact assembly, a laser rangefinder 2, a carrier assembly and a data acquisition processor 7. Particularly, the bearing component sets up in the bottom of assaulting the subassembly, and the impact subassembly falls behind and bumps with the bearing component and produce continuous resilience, and laser range finder 2 is installed on the impact subassembly, but real-time measurement impact subassembly fall behind and bump with the bearing component and produce the numerical value of every rebound height that kick-backs in succession. The data acquisition processor 7 is electrically connected with the laser range finder 2, the data acquisition processor 7 receives the numerical value of each real-time rebound height measured by the laser range finder 2, and draws an actual measurement rebound curve to be compared with a standard rebound curve, so that the rigidity performance of the floating ground filling leveling layer is determined.
And further, removing the bearing assembly, enabling the impact assembly to fall vertically to collide with the ground, repeating the test for many times, measuring the depth of the maximum pit generated on the ground, and further evaluating the mechanical property of the floating ground filling leveling layer.
In one embodiment of the invention, the measurement accuracy of the laser range finder 2 is no greater than 0.1 mm.
The performance testing device for the filling leveling layer of the floating ground, provided by the embodiment of the invention, provides a testing device for testing the rigidity and the loading force of the filling leveling layer on site in a nondestructive mode for the construction of the floating ground. The performance testing device for the filling and leveling layer of the floating ground, provided by the embodiment of the invention, can simultaneously represent two performances of the rigidity of the filling and leveling layer and the mechanical property of the material of the filling and leveling layer, is simple and easy to implement, and provides quality guarantee for the construction of the floating ground.
In one embodiment of the invention, as shown in FIG. 1, an impact assembly comprises: a guide rod 4 and an impact head 3. Specifically, the impact head 3 is sleeved on the guide rod 4 and can freely fall along the guide rod 4. The outer side of the guide rod 4 is marked with a size scale, and the initial height of the impact head 3 can be recorded. Further, in one embodiment of the present invention, the weight of the impact head 3 may be divided into 3-5 weight grades, and the weight of the impact head 3 is 0.5-5 Kg. The length of the guide rod 4 is 1.5m, the diameter is 20-30mm, and the guide rod 4 is a hollow metal tube.
In one embodiment, the end surface of the impact head 3 contacting the bearing component is arc-shaped.
It should be noted that the weight of the impact head 3 can be customized or processed according to the load condition, and is not limited to the weight range defined in the embodiment of the present invention.
In one embodiment of the invention, the impact assembly further comprises a detent fixture. In particular, a detent mount is provided on the impact head 3 to fix the impact head 3 at different heights of the guide rod 4 as an initial position.
As shown in fig. 1, in one embodiment of the present invention, a load bearing assembly comprises: a pressure-bearing air bag 5 and a bearing base 6. Specifically, the pressure-bearing air bag 5 is arranged around the guide rod 4 and is in contact with the outer wall of the guide rod 4. The bottom ends of the pressure-bearing air bag 5 and the guide rod 4 are both arranged on the bearing base 6, and the bearing base 6 is fixed with the ground. The pressure-bearing air bag 5 and the bearing base 6 can be detached.
Further, in one embodiment of the present invention, the load-bearing base 6 is a rigid metal disk having a diameter of 10-20 cm. It will be appreciated that the size of the load-bearing base 6 may be any size that is capable of stabilizing the apparatus for filling a screed with a floating floor, and is not limited to the size defined in the present embodiment.
In one embodiment of the invention, as shown in fig. 1, the laser rangefinder 2 is mounted inside and outside the guide rod 4, in particular, the measuring path of the laser rangefinder 2 is parallel to the central axis of the guide rod 4. The laser distance measuring instrument 2 can measure the distance between the top end of the guide rod 4 and the top end of the impact head 3 and the distance between the top end of the guide rod 4 and the bearing base 6, and the difference value of the two is the numerical value of each rebound height of the impact head 3.
With continued reference to FIG. 1, in one embodiment of the present invention, the apparatus for measuring the performance of a floating floor filling screed further comprises a level 1. Specifically, the level 1 is mounted on the top end of the guide bar 4 for adjusting the verticality of the guide bar 4.
As shown in fig. 2, in one embodiment of the invention, the data acquisition processor 7 receives the values of each rebound height measured by the laser rangefinder 2 to plot a measured rebound curve and compares the measured rebound curve to a standard rebound curve to determine the stiffness properties of the filled screed of the floating ground.
Specifically, the height difference between each rebound height and the standard rebound curve is calculated, and the average value of the absolute values of the height differences is selected as the first evaluation parameter. For example, in one embodiment of the present invention, the first 5 rebound heights can be selected for comparison with the height of a standard rebound curve, and the average of the absolute values of the first 5 height differences is taken as the first evaluation parameter, e.g., Δ h.
And calculating the phase difference between the actually-measured rebound curve and the standard rebound curve, and selecting the average value of the absolute values of the phase differences as a second evaluation parameter. For example, in one embodiment of the present invention, the average of the absolute values of the first 5 phase differences may be selected as the second evaluation parameter, such as Δ θ. And if the first evaluation parameter is less than or equal to 50mm and the second evaluation parameter is less than or equal to 5 degrees, specifically, when the delta h is less than or equal to 50mm and the delta theta is less than or equal to 5 degrees, judging that the rigidity of the floating ground filling leveling layer meets the use requirement.
It should be noted that: the standard rebound curve is the rebound curve of a concrete with thickness not less than 100mm and similar to a settlement-free base course. When the floating ground leveling layer is made of other materials, the set values of the first evaluation parameter and the second evaluation parameter are required to be calibrated again in a laboratory.
The method for using the device for measuring the performance of the floating ground filling leveling layer provided by the embodiment of the invention is described in detail as follows:
the impact head 3 is lifted to a preset height along the guide rod 4, and the verticality of the guide rod 4 is adjusted by the level 1. The guide rod 4 is vertically arranged on the bearing base 6, and the impact head 3 is loosened, so that the impact head 3 freely falls along the guide rod 4.
The impact head 3 collides with the pressure-bearing air bag 5 after falling along the guide rod 4 to generate downward pressure on the bearing base 6, the ground is bent downwards under the impact action to generate displacement, the pressure-bearing air bag 5 generates a certain rebound effect on the impact head 3 after absorbing part of the impact effect, and the impact head 3 generates repeated rebound under the rebound effect of the pressure-bearing air bag 5. The laser rangefinder 2 can measure the value of each rebound height in real time.
Furthermore, the laser range finder 2 monitors the jumping change of the impact head 3 in real time, when the ground is bent and sunk downwards under the impact action, the impact head 3 is influenced to jump, the rebound height and the jumping frequency of the impact head 3 are changed, the behavior characteristics of the impact head 3 after rebounding of the pressure-bearing air bag 5 are recorded through the laser range finder 2, the rigidity performance of the filling leveling layer can be analyzed, and the construction thickness and the bearing capacity are further judged.
And calculating the height difference value of each rebound height and the standard rebound curve, and selecting the average value of the absolute values of the height difference values as a first evaluation parameter. For example, in one embodiment of the present invention, the first 5 rebound heights can be selected for comparison with the height of a standard rebound curve, and the average of the absolute values of the first 5 height differences is taken as the first evaluation parameter, e.g., Δ h.
And calculating the phase difference between the actually-measured rebound curve and the standard rebound curve, and selecting the average value of the absolute values of the phase differences as a second evaluation parameter. For example, in one embodiment of the present invention, the average of the absolute values of the first 5 phase differences may be selected as the second evaluation parameter, such as Δ θ. And if the first evaluation parameter is less than or equal to 50mm and the second evaluation parameter is less than or equal to 5 degrees, specifically, when the delta h is less than or equal to 50mm and the delta theta is less than or equal to 5 degrees, judging that the rigidity of the floating ground filling leveling layer meets the use requirement.
And removing the pressure-bearing air bag 5 and the bearing base 6, enabling the impact head 3 to vertically fall along the guide rod 4, generating a pit with a certain depth after the impact head 3 collides with the ground, repeatedly enabling the impact head 3 to fall for many times, measuring the depth of the maximum pit formed on the ground, and indicating that the mechanical property of the filled leveling layer material is poor when the depth of the maximum pit is greater than a preset value (which can be set according to specific requirements).
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A device for measuring the performance of a filling screed for a floating floor, comprising:
the laser distance measuring device comprises an impact assembly, a laser distance measuring device and a laser distance measuring device, wherein the impact assembly is provided with the laser distance measuring device;
a carrier assembly disposed at a bottom of the impact assembly;
a data acquisition processor electrically connected with the laser range finder,
the impact assembly can fall down along the vertical direction, collide with the bearing assembly and continuously rebound, and the data acquisition processor determines the rigidity performance of the floating ground filling leveling layer based on the rebound height value measured by the laser range finder.
2. The apparatus for determining the performance of a floating ground filling screed according to claim 1, wherein said impact assembly comprises:
the guide rod is marked with size scales on the outer side;
the impact head is sleeved on the guide rod and can freely fall along the guide rod.
3. The apparatus for measuring the filling level of a floating floor according to claim 2, wherein the lower end of the impact head is configured as a circular arc tip.
4. The apparatus for determining the performance of a floating ground filling screed according to claim 2, wherein said impact assembly further comprises: and the clamping fixer is arranged on the impact head so as to fix the impact head on different heights of the guide rod.
5. The apparatus for determining the filling leveling layer of a floating floor according to claim 2, wherein the laser rangefinder is installed inside and outside the guide bar, and a measuring path of the laser rangefinder is parallel to a central axis of the guide bar.
6. The apparatus of claim 2, wherein the laser rangefinder is configured to measure a distance between a top of the guide bar to the load bearing assembly and a distance between the top of the guide bar to a top of the impact head.
7. The apparatus for determining the performance of a floating floor filling screed according to any one of claims 2 to 6, wherein the load bearing assembly comprises: the pressure-bearing air bag is detachably arranged around the guide rod and is in contact with the outer wall of the guide rod.
8. The apparatus for determining the filling screed of a floating floor according to claim 7, wherein the load bearing assembly further comprises: bear the base, bear the base with the guide arm and the bottom of pressure-bearing gasbag can be dismantled and be connected.
9. The apparatus for measuring the filling level of a floating floor according to claim 2, further comprising: the level gauge is installed at the top end of the guide rod so as to adjust the verticality of the guide rod.
10. The apparatus of claim 1, wherein the data acquisition processor is configured to receive each of the rebound height values measured by the laser rangefinder to plot a measured rebound curve and to compare the measured rebound curve to a standard rebound curve to determine the stiffness properties of the floating ground filling screed.
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