CN114235578B - Ice rebound value test fixing frame and ice compressive strength test method - Google Patents
Ice rebound value test fixing frame and ice compressive strength test method Download PDFInfo
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- G—PHYSICS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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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
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- G—PHYSICS
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- 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
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Abstract
The application discloses a fixing frame for testing rebound value of an ice body and a method for testing compressive strength of the ice body, and relates to a method for testing compressive strength of the ice body. The upper end face of the fixed base is provided with a V-shaped groove. The method is realized according to the following steps: manufacturing an ice body test piece; fixing an ice test piece; measuring a rebound value; testing the uniaxial compressive strength; fitting the average rebound value and the uniaxial compressive strength to obtain a compressive strength-rebound value estimation curve formula; rebound values are carried out on ice entities in ice and snow buildings; and obtaining the average compressive strength of different ice entities in the ice and snow building. The application belongs to the field of ice construction.
Description
Technical Field
The application relates to a method for testing compressive strength of an ice body, in particular to a fixing frame for testing rebound value of the ice body and a method for testing compressive strength of the ice body, and belongs to the field of ice buildings.
Background
The development of ice and snow buildings has a long history, and ice and snow buildings using ice as building materials are in areas with higher latitude in the world. Due to the development of ice and snow buildings, ice and snow materials are also changed day by day, and high-performance composite ice bodies with pure ice as a matrix and reinforcing materials added are produced. The ice body has lower strength and stronger brittleness, and is popularized nationwide along with ice and snow buildings, so that the detection and identification of the safety of the ice and snow buildings are increasingly important. The compressive strength of the ice body is one of parameters in the ice and snow building design and is also an important parameter for measuring the safety of the ice and snow building, and the uniaxial compressive strength of the pure ice body is taken as one of design calculation parameters in the ice and snow landscape building design standard. In the traditional ice landscape building construction process, quality inspection and acceptance mainly focuses on detection of building forms of the ice landscape building construction process, and strength detection of ice bodies is not important. A great deal of domestic and foreign researches show that the strength of the ice body has a great influence on the stress performance and safety of the ice and snow landscape architecture.
The traditional measurement of the strength of the ice body often requires the steps of on-site coring, transportation, loading of a testing machine, data processing and the like, and the transportation and loading requirements keep a low-temperature environment due to the particularity of the ice body, so that the standard time is not easy to prepare, and the timeliness of acquiring the uniaxial compressive strength of the ice body on the ice picking and construction site is difficult to meet. The surface hardness of the ice body is an important index for determining the quality of the ice body, and is closely related to the health condition and durability of the material structure. In the prior art, a mode for detecting the strength of the ice body on site is not solved.
Disclosure of Invention
The application aims to solve the problem that in the prior art, a method for detecting the strength of an ice body on site does not exist, and further provides a fixing frame for testing the rebound value of the ice body and a method for testing the compressive strength of the ice body.
The application relates to a test fixing frame for rebound value of ice, which comprises an upper end plate, a lower end plate, four screws and four nuts, wherein the upper end plate is provided with a plurality of screw bolts; the center of the upper end plate is provided with a through hole, four screws are vertically arranged on the lower end plate, the upper end plate is arranged above the lower end plate, the four screws are inserted on the upper end plate, and the top ends of the screws are in threaded connection with a screw cap.
A test fixing frame for rebound value of ice body comprises a fixing base; the unable adjustment base is the cuboid, and unable adjustment base's up end processing has "V" shape recess, and unable adjustment base's lower terminal surface is the plane.
The method is realized according to the following steps:
step one: manufacturing an ice body test piece: preparing 24 cylindrical test pieces in a low-temperature constant-temperature environment laboratory, freezing for 72 hours at freezing temperature respectively, performing surface leveling treatment on the demoulded ice test pieces, and standing for 24 hours in the environment with the same freezing temperature for maintenance;
step two: fixing the ice body test piece: placing each ice test piece after curing on a fixing frame for testing rebound value of an ice in the environment with the same freezing temperature, and tightly clamping an upper end plate and a lower end plate on the ice test piece after curing by screwing nuts on a screw rod to fix the ice test piece;
step three: rebound value measurement: measuring the rebound value of the ice body by using a calibrated hardness measuring instrument, placing the hardness measuring instrument at the through hole of the upper end plate to measure the rebound value of the upper end face of the ice body test piece, detaching the ice body test piece from the ice body rebound value test fixing frame, rotating the ice body test piece by 180 degrees, fixing the ice body test piece on the ice body rebound value test fixing frame again according to the mode in the second step, measuring the rebound value of the upper end face of the ice body test piece, placing the ice body test piece in a V-shaped groove horizontally arranged in a fixing base, measuring the rebound value of the outer circle face of the ice body test piece, and obtaining the average rebound value (R m )；
Step four: uniaxial compressive strength test: after the rebound value measurement is completed, each ice body test piece is placed in a low-temperature universal testing machine and loaded at a loading rate of 0.5mm/min to obtain uniaxial compressive strength (f) c )；
Step five: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting to obtain an estimated curve formula of compressive strength-rebound value of the ice body;
step six: measuring rebound values of ice entities in ice and snow buildings, wherein the number of detection areas selected by one ice entity in a single ice and snow building is not less than 10, the detection areas are as flat as possible and different in position, the distance between two adjacent detection areas is not less than 1m, the number of detection points in each detection area is not less than 17, 17 rebound values obtained in each detection area are averaged after 3 maximum values and 4 minimum values are removed, and the average rebound value (R m,j ) The formula is calculated:wherein R is m,j Mean rebound value of jth zone, R j,k Measuring the rebound value of the ice body by using a calibrated hardness measuring instrument for the rebound value of the kth measuring point of the jth measuring area, and placing the hardness measuring instrument above the ice body to measure the rebound value of the upper end face of the ice body and obtain an average rebound value;
step seven: estimating the intensities of different ice entities in the ice and snow building, and measuring the average rebound value (R m,i ) Substituting into the formula of uniaxial compressive strength-rebound value of the ice body to obtain the compressive strength (f) of the ice body in the area c ) The compressive strength of different ice entities is counted to obtain the average value of the compressive strengths of different ice entities in the ice and snow building as
The application has the most outstanding characteristics and remarkable beneficial effects that:
the application realizes the rapid and accurate detection of the strength in the construction of the ice structure and provides a technical method for detection.
1. The application provides a method for detecting compressive strength of pure ice and composite ice by an ice material rebound method.
2. The application provides the relation between the rebound value and the strength of the ice material, and establishes the standardization of the construction quality acceptance standard of the ice and snow structure.
2. The application has simple principle, overcomes the defect of measuring the strength of the existing ice structure, and can realize the rapid detection of the ice structure strength by adopting a rebound method and using a hardness measuring instrument.
3. The application can ensure the accuracy and objective fairness of ice structural strength judgment when in application.
Drawings
Fig. 1 is a schematic diagram of the whole structure of the ice rebound value test fixing frame.
Fig. 2 is a schematic view of a test piece (2) placed on a fixed base (6).
FIG. 3 is a schematic diagram of rebound value measurement points after the expansion of the two end faces and the outer circular surface of the test piece (2).
FIG. 4 is a flow chart of a method for testing compressive strength of ice according to the present application.
FIG. 5 is a graph showing the relationship between the compressive strength and the rebound value of pure ice
FIG. 6 is a graph showing the relationship between compressive strength and rebound value of composite ice.
Detailed Description
The first embodiment is as follows: describing the present embodiment with reference to fig. 1, the present embodiment provides an ice rebound value test fixture, which includes an upper end plate (1), a lower end plate (5), four screws (3) and four nuts (4); the center of the upper end plate (1) is provided with a through hole, four screw rods (3) are vertically arranged on the lower end plate (5), the upper end plate (1) is arranged above the lower end plate (5), the four screw rods (3) are inserted on the upper end plate (1), and the top ends of the screw rods (3) are in threaded connection with a screw cap (4).
The test piece (2) is arranged between the upper end plate (1) and the lower end plate (5), the test piece (2) is clamped through threaded connection of the screw rod (3) and the screw cap (4), the lower end plate (5) plays a role of counterweight, and the weight of the lower end plate (5) is more than or equal to 20kg.
The second embodiment is as follows: describing the present embodiment with reference to fig. 2, the present embodiment provides an ice rebound value test fixture, which includes a fixing base (6); the fixed base (6) is a cuboid, a V-shaped groove is processed on the upper end face of the fixed base (6), and the lower end face of the fixed base (6) is a plane. The weight of the fixed base (6) is more than or equal to 20kg.
And a third specific embodiment: the method for testing the compressive strength of the ice body according to the present embodiment is implemented by using the ice body to perform the rebound value test and fixing frame, and is implemented according to the following steps:
step one: manufacturing an ice body test piece (2): preparing 24 cylindrical test pieces in a low-temperature constant-temperature environment laboratory, freezing for 72 hours at freezing temperature respectively, performing surface leveling treatment on the demoulded ice test piece (2), and standing for 24 hours in the environment with the same freezing temperature for maintenance;
step two: fixing an ice body test piece (2): placing each ice body test piece (2) after curing is finished on a fixing frame for testing rebound value of an ice body in the environment with the same freezing temperature, and tightly clamping an upper end plate (1) and a lower end plate (5) on the ice body test piece (2) after curing by screwing a screw cap (4) on a screw rod (3) and fixing the ice body test piece (2);
step three: rebound value measurement: measuring the rebound value of the ice body by using a calibrated hardness measuring instrument, placing the hardness measuring instrument in a through hole of an upper end plate (1) to measure the rebound value of the upper end face of the ice body test piece (2), detaching the ice body test piece (2) from an ice body rebound value test fixing frame, rotating the ice body test piece (2) by 180 degrees, fixing the ice body test piece (2) on the ice body rebound value test fixing frame again according to the mode in the second step, measuring the rebound value of the upper end face of the ice body test piece (2), placing the ice body test piece (2) in a V-shaped groove horizontally arranged in a fixing base (6), measuring the rebound value of the outer circle face of the ice body test piece (2), and obtaining the average rebound value (R) measured by the rebound values of the two end faces and the outer circle face of the ice body test piece (2) m )；
The cylindrical test piece of the composite ice body repeatedly rebounds at one measuring point for 5 times, and the peak value is taken as the rebound value of the measuring point. The pure ice cylinder test piece rebounds once at one measuring point. After a cylindrical test piece rebounds, 17 rebound values of the test points are obtained, 3 maximum values and 4 minimum values are removed, and an average value is calculated as an average rebound value (R m )。
Step four: uniaxial compressive strength test: after the rebound value measurement is completed, each ice body test piece (2) is placed in a low-temperature universal testing machine to be loaded at a loading rate of 0.5mm/min, so as to obtain uniaxial compressive strength (f) c )；
Step five: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting to obtain a uniaxial compressive strength-rebound value estimated curve formula of the ice body;
in a low-temperature laboratory, a uniaxial compressive strength-hardness value estimation curve formula of the ice body is obtained.
Step six: measuring rebound value of ice entity in ice and snow building, and singleThe ice and snow building has at least 10 ice body entities, as smooth as possible and different positions, two adjacent detection areas with distance not less than 1m, 17 detection points in each detection area, 17 rebound values obtained in each detection area, and average rebound value (R m,j ) The formula is calculated:wherein R is m,i For the average rebound value of the ith zone, R i,j Measuring the rebound value of the ice body by using a calibrated hardness measuring instrument for the rebound value of the jth measuring point in the ith measuring area, and measuring the rebound value of the ice body by using the hardness measuring instrument to obtain an average rebound value;
step seven: estimating the intensities of different ice entities in the ice and snow building, and measuring the average rebound value (R m,i ) Substituting into the formula of uniaxial compressive strength-rebound value of the ice body to obtain the compressive strength (f) of the ice body in the area c ) The compressive strength of different ice entities is counted to obtain the average value of the compressive strengths of different ice entities in the ice and snow building as
The specific embodiment IV is as follows: referring to fig. 1 to 6, the method for testing compressive strength of ice according to the present embodiment is provided, in which in the first step, the ice test pieces (2) are cylindrical frozen with pure ice, the ratio of the height value of the cylindrical test pieces to the diameter value of the cylindrical test pieces is equal to or greater than 2, 6 ice test pieces (2) with a freezing temperature of-20 ℃, 6 ice test pieces (2) with a freezing temperature of-15 ℃, 6 ice test pieces (2) with a freezing temperature of-10 ℃, and 6 ice test pieces (2) with a freezing temperature of-5 ℃. Other structural connection relationships are the same as those of the third embodiment.
Fifth embodiment: the method for testing compressive strength of ice body according to the present embodiment will be described with reference to fig. 1 to 6, wherein in the third step, the hardness measuring instrument is a hardness meter of rillMeasuring a line rebound value, wherein in the fifth step: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting, wherein the compression strength-rebound value estimation curve formula of pure ice is as follows: f (f) c，PI ＝0.024R PI 3.689 where f c，PI Compressive strength of pure ice, R PI Is the rebound value of pure ice. Other structural connection relationships are the same as those of the fourth embodiment.
Specific embodiment six: describing the present embodiment with reference to fig. 1 to 5, the method for testing compressive strength of ice according to the present embodiment measures compressive strength of pure ice according to average rebound value (R m,k ) Substituted into formula f c，PI ＝0.024R PI In-3.689, the compressive strength f of the kth region of the composite ice entity is obtained c,k Will f c,k Substitution formula isIn (I)>The average value of the compressive strength conversion values of the pure ice entities of the ice and snow building is obtained, n is the number of the areas of the pure ice entities of the ice and snow building, and the average value of the compressive strength conversion values of the pure ice entities in the ice and snow building is +.>Other structural connection relationships are the same as those of the fifth embodiment.
Seventh embodiment: in the method for testing compressive strength of ice body provided by the embodiment, the first step is to manufacture a cylindrical ice body test piece (2) frozen by composite ice, the ratio of the height value of the cylindrical ice body test piece to the diameter value of the cylindrical ice body is greater than or equal to 2, the composite ice is mainly a high-performance raw pulp fiber composite ice body, the adding amount of the reinforcing material is 1%, 2% and 4%, the adding amount of the reinforcing material is 1% and the freezing temperature is-20 ℃, the number of the ice body test pieces (2) with the freezing temperature of 1% and the freezing temperature of-15 ℃ is 6, the adding amount of the reinforcing material is 1% and the freezing temperature of-10 ℃ is 6, the adding amount of the reinforcing material is 1% and the freezing temperature of-5 ℃, the number of the ice body test pieces (2) with the freezing temperature of 2% and the freezing temperature of-20 ℃, the adding amount of the reinforcing material is 6, the ice body test pieces (2) with the freezing temperature of-15, the adding amount of the reinforcing material is 6, the ice body test pieces (2) with the freezing temperature of 2% and the reinforcing material is 4% and the freezing temperature of-15%, the ice body test pieces (2) with the freezing temperature of 2% and the reinforcing material is 6, the adding amount of the reinforcing material is 4% and the ice body test pieces (2) with the freezing temperature of-5%, 6 ice body test pieces (2) with 4% of reinforcing material addition and freezing temperature of-5 ℃. Other structural connection relationships are the same as those of the third embodiment.
Eighth embodiment: in the method for testing compressive strength of ice body according to the present embodiment, the hardness measuring instrument is a rebound value measuring instrument, the rebound value of the composite ice material is measured by using the rebound value measuring instrument, and the impact kinetic energy of the composite ice material is kept near 0.471J by changing the spring stiffness. Step five,: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting, wherein the compression strength-rebound value estimation curve formula of the composite ice is as follows: f (f) c，FRI ＝3.157+9.9717×10 -9 ×R FRI 3.691 Wherein f c，FRI R is the compressive strength of the composite ice body FRI Is the rebound value of the composite ice body. Other structural connection relationships are the same as those of the seventh embodiment.
Detailed description nine: describing the present embodiment with reference to fig. 4 to fig. 6, a method for testing compressive strength of an ice body according to the present embodiment is provided, where when the ice body measured in the sixth step is compressive strength of a composite ice body, the average rebound value (R m,l ) Substituted into formula f c，FRI ＝3.157+9.9717×10 -9 ×R FRI 3.691 In (1) to obtainCompressive strength f to first zone of composite ice entity c,l Will f c,l Substitution formula isIn (I)>The average value of compressive strength conversion values of the composite ice entities of the ice and snow building is obtained, n is the number of the areas of the composite ice entities of the ice and snow building, and the average value of compressive strength conversion values of the composite ice entities in the ice and snow building is +.>Other structural connection relationships are the same as those of the eighth embodiment.
The present application is capable of other and further embodiments and its several details are capable of modification and variation in light of the present application, as will be apparent to those skilled in the art, without departing from the spirit and scope of the application as defined in the appended claims.
Claims (7)
1. The method for testing the compressive strength of the ice body comprises an upper end plate (1), a lower end plate (5), a fixed base (6), four screws (3) and four nuts (4); the center processing of upper end plate (1) has the through-hole, and four screw rods (3) are vertical to be installed on lower end plate (5), and upper end plate (1) set up in lower end plate (5) top, and four screw rods (3) cartridge are on upper end plate (1), the top and the nut (4) threaded connection of screw rod (3), and unable adjustment base (6) are the cuboid, and unable adjustment base (6)'s up end processing has "V" shape recess, and unable adjustment base (6) lower terminal surface is the plane, its characterized in that: the method is to test by using an ice body to carry out rebound value test fixing frame, and is realized according to the following steps:
step one: manufacturing an ice body test piece (2): preparing 24 cylindrical test pieces in a low-temperature constant-temperature environment laboratory, freezing for 72 hours at freezing temperature respectively, performing surface leveling treatment on the demoulded ice test piece (2), and standing for 24 hours in the environment with the same freezing temperature for maintenance;
step two: fixing an ice body test piece (2): placing each ice test piece (2) after curing in an environment with the same freezing temperature on a fixing frame for testing the rebound value of the ice, and tightly clamping an upper end plate (1) and a lower end plate (5) on the ice test piece (2) after curing by screwing a screw cap (4) on a screw rod (3) and fixing the ice test piece (2);
step three: rebound value measurement: measuring the rebound value of the ice body by using a calibrated hardness measuring instrument, placing the hardness measuring instrument in a through hole of an upper end plate (1) to measure the rebound value of the upper end face of the ice body test piece (2), detaching the ice body test piece (2) from an ice body rebound value test fixing frame, rotating the ice body test piece (2) by 180 degrees, fixing the ice body test piece (2) on the ice body rebound value test fixing frame again according to the mode in the second step, measuring the rebound value of the upper end face of the ice body test piece (2), placing the ice body test piece (2) in a V-shaped groove horizontally arranged in a fixing base (6), measuring the rebound value of the outer circle face of the ice body test piece (2), and obtaining the average rebound value (R) measured by the rebound values of the two end faces and the outer circle face of the ice body test piece (2) m )；
Step four: uniaxial compressive strength test: after the rebound value measurement is completed, each ice body test piece (2) is placed in a low-temperature universal testing machine to be loaded at a loading rate of 0.5mm/min, so as to obtain uniaxial compressive strength (f) c )；
Step five: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting to obtain a uniaxial compressive strength-rebound value estimated curve formula of the ice body;
step six: measuring rebound values of ice entities in ice and snow buildings, wherein the number of detection areas selected by one ice entity in a single ice and snow building is not less than 10, the detection areas are as flat as possible and different in position, the distance between two adjacent detection areas is not less than 1m, the number of detection points in each detection area is not less than 17, 17 rebound values obtained in each detection area are averaged after 3 maximum values and 4 minimum values are removed, and the average rebound value (R m,j ) The formula is calculated:wherein R is m,i For the average rebound value of the ith zone, R i,j Measuring the rebound value of the ice body by using a calibrated hardness measuring instrument for the rebound value of the jth measuring point in the ith measuring area, and measuring the rebound value of the ice body by using the hardness measuring instrument to obtain an average rebound value;
step seven: estimating the intensities of different ice entities in the ice and snow building, and measuring the average rebound value (R m,i ) Substituting into the formula of uniaxial compressive strength-rebound value of the ice body to obtain the compressive strength (f) of the ice body in the area c ) The compressive strength of different ice entities is counted to obtain the average value of the compressive strengths of different ice entities in the ice and snow building as
2. The method for testing compressive strength of ice according to claim 1, wherein: in the first step, the ice body test pieces (2) are cylindrical test pieces frozen by pure ice bodies, the ratio of the height of the cylindrical test pieces to the diameter of the cylindrical test pieces is more than or equal to 2, 6 ice body test pieces (2) with the freezing temperature of-20 ℃ are produced, 6 ice body test pieces (2) with the freezing temperature of-15 ℃ are produced, 6 ice body test pieces (2) with the freezing temperature of-10 ℃ are produced, and 6 ice body test pieces (2) with the freezing temperature of-5 ℃ are produced.
3. The method for testing compressive strength of ice according to claim 2, wherein: in the third step, the hardness measuring instrument is a Richter hardness tester for rebound value measurement, and in the fifth step: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting, wherein the compression strength-rebound value estimation curve formula of pure ice is as follows: f (f) c，PI ＝0.024R PI 3.689 where f c，PI Compressive strength of pure ice, R PI Is the rebound value of pure ice.
4. According to claim 3The ice compression strength testing method is characterized by comprising the following steps of: when the compressive strength of a pure ice entity in an ice and snow building is measured, the average rebound value (R m,k ) Substituted into formula f c，PI ＝0.024R PI In-3.689, the compressive strength f of the kth region of the composite ice entity is obtained c,k Will f c,k Substitution formula isIn (I)>The average value of the compressive strength conversion values of the pure ice entities of the ice and snow building is obtained, n is the number of the areas of the pure ice entities of the ice and snow building, and the average value of the compressive strength conversion values of the pure ice entities in the ice and snow building is +.>
5. The method for testing compressive strength of ice according to claim 1, wherein: the method comprises the steps of firstly, manufacturing a cylindrical ice body test piece (2) frozen by a composite ice body, wherein the ratio of the height value of the cylindrical ice body test piece to the diameter value of the cylindrical ice body test piece is more than or equal to 2, the composite ice body is mainly a high-performance original paper pulp fiber composite ice body, the adding amount of reinforcing materials is 1%, 2% and 4%, the adding amount of the reinforcing materials is 1%, the freezing temperature of the ice body test piece (2) at minus 20 ℃ is 6, the adding amount of the reinforcing materials is 1%, the freezing temperature of the ice body test piece (2) at minus 15 ℃ is 6, the freezing temperature of the reinforcing materials is 1%, the freezing temperature of the ice body test piece (2) at minus 10 ℃, the adding amount of the reinforcing materials is 6, the ice body test piece (2) at 2% freezing temperature of the reinforcing materials is minus 20 ℃, the ice body test piece (2) at 2% freezing temperature of the reinforcing materials is 6, the ice body test piece (2) at 2% freezing temperature of minus 15 ℃, the ice body test piece (2) at 2% freezing temperature of the reinforcing materials at minus 10 ℃ is 6, the adding amount of the ice body test piece (2) at 2% freezing temperature of the reinforcing materials at minus 4% at the reinforcing materials at the freezing temperature of the 6%, the ice body test piece (2) at 2% at the freezing temperature of the reinforcing materials at minus 10%, 6 ice body test pieces (2) with 4% of reinforcing material addition and freezing temperature of-5 ℃.
6. The method for testing compressive strength of ice body according to claim 5, wherein: in the third step, the hardness measuring instrument measures rebound value for the rebound instrument with the impact kinetic energy of about 0.471J, and in the fifth step: the average rebound value (R m ) And uniaxial compressive strength (f) obtained in the fourth step c ) Fitting, wherein the compression strength-rebound value estimation curve formula of the composite ice is as follows: f (f) c，FRI ＝3.157+9.9717×10 -9 ×R FRI 3.691 Wherein f c，FRI Is the compressive strength of the composite ice, R FRI Is the rebound value of the composite ice.
7. The method for testing compressive strength of ice body according to claim 6, wherein: in the sixth step, when the compressive strength of the composite ice entity in the ice and snow building is measured, the average rebound value (R m,l ) Substituted into formula f c，FRI ＝3.157+9.9717×10 -9 ×R FRI 3.691 The compressive strength f of the first area of the composite ice body is obtained c,l Will f c,l Substitution formula isIn (I)>The average value of compressive strength conversion values of the composite ice entities of the ice and snow building is obtained, n is the number of the areas of the composite ice entities of the ice and snow building, and the average value of compressive strength conversion values of the composite ice entities in the ice and snow building is +.>
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