Safety verification method and system for floor slab on crane and storage medium

Abstract

The invention provides a safety verification system and method for a floor slab on a crane. The method comprises the steps that floor slab parameters are determined according to construction drawing data; inquiring a crane specification to determine crane parameters; assuming the most unfavorable load position to carry out walking state analysis, comparing the calculated maximum bending moment under each working condition, and finally determining the maximum bending moment borne by the floor slab; considering the most unfavorable condition, and calculating the maximum bending moment when the load of the last row of supporting legs acts on the middle of the plate span; and comparing the maximum bending moments calculated in the previous two steps, analyzing the floor by taking the larger value of the maximum bending moments, obtaining the floor reinforcement according to the maximum bending moments, and comparing and analyzing the floor reinforcement with the designed reinforcement to confirm whether the floor is safe or not.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a safety verification method, system and storage medium for cranes climbing onto floor slabs. Background Technology

[0002] Cranes, with their advantages of convenience, flexibility, quick relocation, and high operational efficiency, have been widely used in the field of structural engineering. However, due to the large mass of cranes, the safety of floor slabs must be rigorously verified when they travel or operate on them. The mechanical models corresponding to crane travel and operation differ, and the influencing factors of these models vary depending on the type of floor slab and the specifications of the crane, making accurate definition difficult. Currently, there is no dedicated mechanical model for cranes operating on floor slabs. Existing technologies mostly use finite element analysis for safety verification, which not only makes it difficult to accurately predict the internal forces of the floor slab under the two conditions, increasing the difficulty of floor slab reinforcement calculation, but also suffers from computational complexity and long processing times, limiting its widespread use among on-site engineers. In actual engineering projects, estimations often rely on the experience of workers, which suffers from insufficient calculation accuracy and difficulty in ensuring construction quality. To overcome these technical challenges, this invention provides a novel safety verification system and method for cranes operating on floor slabs. Summary of the Invention

[0003] To address the problem in existing technologies that make it difficult to accurately predict the internal forces of floor slabs under crane travel and operation conditions, thus leading to significant challenges in floor slab reinforcement verification, this invention provides a safety verification method, system, and storage medium for cranes operating on floor slabs. This method, supported by theoretical analysis and numerical simulation, can efficiently perform floor slab reinforcement verification based on internal forces, significantly improving calculation accuracy while effectively ensuring construction quality and efficiency.

[0004] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0005] A safety verification method for lifting a crane onto a floor slab includes the following steps:

[0006] Step 1: Determine the floor slab parameters based on the construction drawings;

[0007] Step 2: Consult the crane's instruction manual to determine the crane's parameters;

[0008] Step 3: Walking state analysis, obtain the maximum bending moment under different working conditions, and determine the final maximum bending moment that the floor slab will bear after comparative analysis;

[0009] Step 4: Working condition analysis, considering the bending moment when the load is concentrated on the last row of outriggers under the most unfavorable conditions;

[0010] Step 5: Compare the bending moment data obtained in Step 3 and Step 4, take the larger value to calculate the reinforcement of the floor slab, and compare it with the design reinforcement to confirm whether the floor slab is safe.

[0011] Furthermore, in step 3, different working conditions include: 4 rows of wheel axles on the same floor slab, 3 rows of wheel axles on the same floor slab, 2 rows of wheel axles on the same floor slab, ..., only 1 row of wheel axles on the same floor slab.

[0012] Furthermore, the specific process of step 3 is as follows:

[0013] For the case where four rows of wheel axles are on the same floor slab:

[0014] Let K be the location of the most unfavorable load, and let x be the distance between K and point A at the leftmost support. Let F be the load. PK When applied to K, the moment equilibrium equation at K is M. k (x) is:

[0015]

[0016] Differentiating the above equation, we get:

[0017]

[0018] In the formula, F represents PK Forces on the left floor slab relative to F PK The sum of the moments at the point of application; F R F is the resultant force of all forces located on the floor slab. Ay L represents the reaction force at point A; x w is the length of the floor slab; w is F R Location to F PK Distance from the location (the location of the most unfavorable load);

[0019] Setting formula (2) to zero, then (L x Given that -2x-w) is 0, find the value of x;

[0020] Then, based on the most unfavorable load location and load value, the maximum bending moment |M| under each working condition is calculated. max :

[0021]

[0022] Furthermore, the calculation method for w is as follows:

[0023] When all four rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the second and third wheel axles. At this point, w = (G3×d3 + G4×d4 - G1×d1 - G2×d2) / (G1 + G2 + G3 + G4). When the last three rows of wheel axles are on the same floor slab, the crane's center of gravity is set 1 meter to the left of the force of G3. At this point, w = (G3×d3 + G4×d4 - G2×d2) / (G2 + G3 + G4). When the first three rows of wheel axles are on the same floor slab, the crane's center of gravity is set 1 meter to the right and left of the force of G2. At this point, w = (G1×d1 + G2×d2 – G3×d4). 23 When the last two rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the 3rd and 4th wheel axles, at which point w = (G4 × d4 – G3 × d3) / (G3 + G4); When the first two rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the 1st and 2nd wheel axles, at which point w = (G1 × d1 – G2 × d2) / (G1 + G2); When the 1st row of wheel axles is on the same floor slab, the crane's center of gravity is set at the axis of the 1st row of wheel axles, at which point w = 0; When the 4th row of wheel axles is on the same floor slab, the crane's center of gravity is set at the axis of the 4th row of wheel axles, at which point w = 0;

[0024] Wherein, G1, G2, G3, and G4 represent the axle loads of the 1st, 2nd, 3rd, and 4th rows of wheels, respectively; d4, d3, d2, and d1 represent the distances of the 4th, 3rd, 2nd, and 1st row of wheel axles from the crane's center of gravity, respectively.

[0025] Furthermore, under different operating conditions, the aforementioned The calculation is as follows:

[0026] When four rows of wheel axles are on the same floor slab

[0027] When the axles of the last three rows of wheels are on the same floor slab,

[0028] When the axles of the first three rows of wheels are on the same floor slab,

[0029] When the axles of the last two rows of wheels are on the same floor slab,

[0030] When the axles of the first two rows of wheels are on the same floor slab,

[0031] When the axles of the fourth row of wheels are on the same floor slab...

[0032] When the first row of wheel axles are on the same floor slab

[0033] Where g represents gravitational acceleration.

[0034] Furthermore, in step 4, during the working state, the crane outriggers are extended, and the load is borne by the outriggers. Considering the most unfavorable situation, the load is concentrated on the last row of outriggers, and the formula for calculating the bending moment M is:

[0035]

[0036] Where F represents the outrigger load.

[0037] A system for implementing the above-mentioned safety verification method for cranes moving onto floor slabs includes:

[0038] The walking status analysis module receives manually collected and input floor slab parameters and crane parameters, performs working condition analysis, determines the most unfavorable load location and load value, calculates the maximum bending moment under different working conditions, and obtains the maximum bending moment that the floor slab can withstand through comprehensive comparison.

[0039] The working status analysis module receives manually collected and input floor slab parameters and crane parameters, considers the worst-case scenario, and calculates the bending moment when the load is concentrated on the last row of outriggers.

[0040] The floor slab reinforcement analysis module, combined with the values ​​calculated by the comprehensive walking state analysis module and the working state analysis module, determines the maximum bending moment, calculates the reinforcement, and compares the calculated reinforcement data with the pre-input actual floor slab reinforcement data to determine whether the floor slab reinforcement meets the requirements, and thus whether the floor slab is safe.

[0041] A computer storage medium storing a computer program that, when executed by a processor, implements steps 3 to 5 of the safety verification method for a crane going up a floor as described in claim 1.

[0042] The present invention has the following beneficial effects:

[0043] This invention targets concrete floor slabs, a common component in engineering structures. Based on theoretical analysis and numerical simulation, it obtains the maximum internal force of the floor slab under the action of a moving crane load and verifies whether the reinforcement of the floor slab meets the requirements. This achieves accurate prediction of the internal force of the floor slab, solving the problem that existing floor slabs require iterative calculations to obtain the maximum internal force value under the action of moving live loads. This improves the accuracy of internal force calculation during the construction of building structures, ensuring construction quality and efficiency. Attached Figure Description

[0044] Figure 1 This is a flowchart of the safety verification method for a crane going up a floor slab as described in this invention;

[0045] Figure 2This is a schematic diagram of the concrete floor slab in Example 2;

[0046] Figure 3 This is a schematic diagram of the crane in Example 2;

[0047] Figure 4 A schematic diagram showing the forces acting on four rows of wheel axles on the same floor slab.

[0048] Figure 5 A schematic diagram showing the forces acting on three rows of wheel axles on the same floor slab.

[0049] Figure 6 This is a schematic diagram showing the forces acting on two rows of wheel axles on the same floor slab. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0051] Example 1:

[0052] The safety verification method for cranes going up to floor slabs described in this invention is as follows: Figure 1 As shown, the specific process includes the following:

[0053] Step 1: Determine the floor slab parameters based on the construction drawings, including the floor slab length L. x Width L y Thickness h and design reinforcement quantity and dimensions, where L x ≥L y For single-span floor slabs, the floor slab parameters are taken from that span; for multi-span floor slabs, the floor slab parameters are taken from the maximum span value.

[0054] Step 2: Consult the crane manual to determine the crane parameters, including the crane's self-weight G, the number of wheel axles n (in this embodiment, the number of wheel axles is 4), and the axle loads G1, G2, ..., G of each wheel. n (Axle load needs to be determined based on the crane manual, G = G1 + G2 + ... + G n The wheelbases of adjacent wheels a1, a2, ..., a n-1 (Where, the total wheelbase a = a1 + a2 + ... + a n-1 ), wheel lateral spacing b;

[0055] It is necessary to compare a and L x The relationship is used to determine the analytical conditions; for example, a≤L x At that time, the following working conditions exist: n rows of wheel axles are on the same floor slab, n-1 rows of wheel axles are on the same floor slab, n-2 rows of wheel axles are on the same floor slab, ..., only 1 row of wheel axles is on the same floor slab; a > L xAt this time, n wheel axles cannot be on the same floor slab simultaneously. Since the weights of each wheel axle are generally different, special attention needs to be paid to the axle with the highest load for subsequent analysis.

[0056] Step 3: Walking Status Analysis:

[0057] When the crane is traveling, multiple rows of tires may be on the floor at the same time, or only one row of tires may be on the floor. Therefore, it is necessary to consider the internal forces of the floor under different working conditions.

[0058] (I) Theoretical Analysis:

[0059] First, such as Figure 4 As shown, when four rows of wheel axles are on the same floor slab, assume the most unfavorable load position is K, the distance from K to point A (the leftmost support) is x, and the load is F. PK When applied to K, the moment equilibrium equation at K is M. k (x) is:

[0060]

[0061] Differentiating the above equation, we get:

[0062]

[0063] In the formula, F represents PK Forces (G1 and G2) on the left floor slab relative to F PK The sum of the torques at the point of application. It is independent of x and is a constant; F R F is the resultant force of all forces (G1, G2, G3, G4) located on the floor slab. Ay Represents the reaction force at point A;

[0064] w is F R Location to F PK Distance from the location (most unfavorable load location):

[0065] w=(G3×d3+G4×d4-G1×d1-G2×d2) / (G1+G2+G3+G4) (3)

[0066] In the formula, d4 represents the distance between the fourth row of wheel axles and the center of gravity of the crane, d3 represents the distance between the third row of wheel axles and the center of gravity of the crane, d2 represents the distance between the second row of wheel axles and the center of gravity of the crane, and d1 represents the distance between the first row of wheel axles and the center of gravity of the crane.

[0067] It is important to note that the crane's center of gravity position varies depending on the operating conditions. The center of gravity should be set reasonably by the operator based on their technical experience in the field. When four rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the second and third rows of wheel axles. When three rows (the last three rows) of wheel axles are on the same floor slab, the crane's center of gravity is set 1 meter to the left of the force of G3, at which point w = (G3×d3 + G4×d4 - G2×d2) / (G2 + G3 + G4). When three rows (the first three rows) of wheel axles are on the same floor slab, the crane's center of gravity is set 1 meter to the right and left of the force of G2, at which point w = (G1×d1 + G2×d2 – G3×d4) / (G2 + G3 + G4). 23 When two rows (the last two rows) of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the third and fourth wheel axles, at which point w = (G4×d4 – G3×d3) / (G3+G4); When two rows (the first two rows) of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the first and second wheel axles, at which point w = (G1×d1 – G2×d2) / (G1+G2); When one row (the first row) of wheel axles is on the same floor slab, the crane's center of gravity is set at the axis of the first wheel axle, at which point w = 0; When one row (the fourth row) of wheel axles is on the same floor slab, the crane's center of gravity is set at the axis of the fourth wheel axle, at which point w = 0.

[0068] Secondly, setting the discriminant to zero, we correct the most unfavorable load location based on the assumed location:

[0069] Let formula (2) be zero, since It cannot be zero, therefore (L) x -2x-w) should be 0, so find the value of x.

[0070] Then, based on the most unfavorable load location and load value, the maximum bending moment |M| under each working condition is calculated. max :

[0071]

[0072] in:

[0073] When four rows of wheel axles are on the same floor slab

[0074] When the axles of the three rows (last three rows) of wheels are on the same floor slab,

[0075] When the axles of the first three rows of wheels are on the same floor slab,

[0076] When two rows (the last two rows) of wheel axles are on the same floor slab,

[0077] When two rows (the first two rows) of wheel axles are on the same floor slab,

[0078] When the wheel axles of the first row (fourth row) are on the same floor slab,

[0079] When the first row of wheel axles is on the same floor slab,

[0080] Finally, by comparing the maximum bending moment data obtained from calculations under different working conditions, the maximum bending moment that the floor slab can ultimately withstand is determined.

[0081] (ii) Numerical simulation calculation;

[0082] The floor slab is simulated using plate elements and the surrounding beams are simulated using beam elements. The plate elements and beam elements are coupled and consolidated. Simply supported boundary conditions are applied to the bottom of the beam elements. The axle loads of each wheel are applied to the plate elements, and the maximum bending moment of the plate elements under the load is extracted.

[0083] Step 4: Working Status Analysis:

[0084] In the working state, with the crane outriggers extended, the load is borne by the outriggers. Considering the worst-case scenario, the load is concentrated on the last row of outriggers. The bending moment calculation formula is:

[0085]

[0086] Step 5: Slab reinforcement analysis;

[0087] Compare the maximum bending moment values ​​calculated in steps 3 and 4, and take the larger value to analyze the reinforcement of the floor slab. Calculate the floor slab reinforcement based on the maximum bending moment and compare it with the design reinforcement. If the calculated reinforcement is greater than the design reinforcement, the floor slab is safe; if the calculated reinforcement is less than the design reinforcement, the floor slab is unsafe.

[0088] The present invention also provides a safety verification system for cranes moving onto floor slabs, comprising:

[0089] The walking status analysis module receives manually collected and input floor slab parameters and crane parameters, performs working condition analysis, determines the most unfavorable load location and load value, calculates the maximum bending moment under different working conditions, and obtains the maximum bending moment that the floor slab can withstand through comprehensive comparison.

[0090] The working status analysis module receives manually collected and input floor slab parameters and crane parameters, considers the most unfavorable situation, and calculates the maximum bending moment value of the load concentrated on the last row of outriggers;

[0091] The floor slab reinforcement analysis module, combined with the values ​​calculated by the comprehensive walking state analysis module and the working state analysis module, determines the maximum bending moment, calculates the reinforcement, and compares the calculated reinforcement data with the pre-input actual floor slab reinforcement data to determine whether the floor slab reinforcement meets the requirements.

[0092] The present invention also provides a computer storage medium storing a computer program that, when executed by a processor, implements steps 3 to 5 of the above-described safety verification method for a crane going up a floor.

[0093] Example 2:

[0094] A specific engineering project was selected for the scheme description, and a detailed explanation of the safety verification of a crane with 4 wheel axles (n) being used to climb a floor slab was provided, as follows:

[0095] Step 1: As Figure 2 As shown, the floor slab parameters, including the floor slab length L, are determined based on the construction drawings. x =7.79m, floor slab width L y =3.71m, floor slab thickness h=0.18m, the floor slab is designed with HRB400 steel bars with a diameter of 16mm and a spacing of 200mm.

[0096] Step 2: As Figure 3 As shown, the crane parameters are determined according to the crane instruction manual: crane weight G = 46t; number of wheel axles n = 4, axle weight of the first row of wheels starting from the front of the crane: G1 = 11t, G2 = 11t, G3 = 12t, G4 = 12t; wheelbase distance between the first and second rows of wheels: a1 = 1.45m, a2 = 4.50m, a3 = 1.35m; wheelbase distance between the first and fourth rows of wheels (i.e., total wheelbase): a = 7.30m; lateral wheel spacing b = 2.55m.

[0097] Since a≤L x Therefore, theoretically, the following working conditions exist: 4 rows of wheel axles on the floor, 3 rows of wheel axles on the floor, 2 rows of wheel axles on the floor, and 1 row of wheel axles on the floor.

[0098] Step 3: Walking Status Analysis:

[0099] When the crane is moving, the most unfavorable longitudinal load position is determined based on the simply supported one-way slab method. The specific process is as follows:

[0100] (I) such as Figure 4 As shown, four rows of wheel axles appear on the same floor slab. At this point, the crane's center of gravity is set at the midpoint of the line connecting the second and third rows of wheel axles.

[0101] (1) According to formula (3) in Example 1, the distance w is calculated as follows:

[0102] w=(G3×d3+G4×d4-G1×d1-G2×d2) / (G1+G2+G3+G4)

[0103] =[12×2.25+12×(2.25+1.35)-11×2.25-11×(2.25+1.45)] / (12+12+11+11)=0.103m.

[0104] (2) Based on the discriminant (L) x When -2x-w)=0, find x:

[0105] (3) Based on formula (4) in Example 1, calculate the maximum bending moment under each working condition:

[0106]

[0107] =213.90 kN·m.

[0108] (II) such as Figure 5 As shown, the three rows of wheel axles appear on the same floor slab (considering the influence of axle load, since the axle loads of the four rows of wheels are 11t, 11t, 12t, and 12t respectively, the latter three rows of wheel axles appear on the same floor slab). At this time, the crane's center of gravity is set to be located 1 meter to the left of the force of G3.

[0109] (1) According to formula (3) in Example 1, the distance w is calculated as follows:

[0110] w=(G3×d3+G4×d4-G2×d2) / (G2+G3+G4)=[12×1+12×(1+1.35)-11×(3.5)] / (11+12+12)=0.049m

[0111] (2) Based on the discriminant (L) x When -2x-w)=0, find x:

[0112] (3) Based on formula (4) in Example 1, calculate the maximum bending moment under each working condition:

[0113]

[0114] (III) such as Figure 6As shown, two rows of wheel axles appear on the same floor slab (considering the influence of axle load; since the weights of the four rows of wheel axles are 11t, 11t, 12t, and 12t respectively, the latter two rows of wheel axles are considered to appear on the same floor slab). At this time, the crane's center of gravity is set at the midpoint of the span connecting the third and fourth rows of wheel axles.

[0115] (1) According to formula (3) in Example 1, the distance w is calculated as follows:

[0116] w=(G4×d4–G3×d3) / (G3+G4)=[12×0.675-12×0.675] / (12+12)=0.0m

[0117] (2) Based on the discriminant (L) x When -2x-w)=0, find x:

[0118] (3) Based on formula (4) in Example 1, calculate the maximum bending moment under each working condition:

[0119]

[0120] (Ⅳ) The first row of wheels appears on the same floor slab (considering the influence of axle load, since the axle loads of the four rows of wheels are 11t, 11t, 12t, and 12t respectively, it is considered that the last row of wheels appears on the same floor slab). At this time, the center of gravity of the crane is set to be located at the axle position of the fourth row of wheels.

[0121] The axle load of the fourth row of wheels (G4 = 12t) is located at the mid-span:

[0122]

[0123] Comparing the results of (Ⅰ), (Ⅱ), (Ⅲ) with (Ⅳ), it can be seen that the maximum bending moment is 379.06 kN·m.

[0124] (II) Numerical simulation calculation:

[0125] The maximum bending moment calculated by finite element method was 365.72 kN·m, with an error of 3.65%. Therefore, the accuracy of the method proposed in this invention has been verified when a crane with four wheel axles travels on a floor slab.

[0126] Step 4: Working Status Analysis:

[0127] According to the crane manual, the outrigger load is 58 tons. Based on formula (5), the bending moment is:

[0128] M = 58 × 9.81 × 7.79 / 4 = 1108.09 kN·m. Meanwhile, the finite element calculation value is 1060.37 kN·m, with an error of 4.50%. Therefore, the accuracy of the method proposed in this invention has been verified.

[0129] Step 5: Slab Reinforcement Analysis:

[0130] Based on the calculated values ​​in steps 3 and 4 of Example 2, the maximum bending moment is 1108.09 kN·m. Based on this, the reinforcement is calculated according to the method of "Structural Mechanics" as follows: diameter 14mm and spacing 200mm. According to the materials in the drawings, the design reinforcement is: diameter 16mm and spacing 200mm. Therefore, the floor slab reinforcement meets the requirements, and it is safe for the crane to go up the floor slab.

[0131] The embodiments described above are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A safety verification method for a crane being lifted onto a floor slab, characterized in that, The process includes the following: Step 1: Determine the floor slab parameters based on the construction drawings; Step 2: Consult the crane's instruction manual to determine the crane's parameters; Step 3: Walking state analysis, obtain the maximum bending moment under different working conditions, and determine the final maximum bending moment that the floor slab will bear after comparative analysis; Step 4: Working condition analysis, considering the bending moment when the load is concentrated on the last row of outriggers under the most unfavorable conditions; Step 5: Compare the bending moment data obtained in Step 3 and Step 4, take the larger value to calculate the reinforcement of the floor slab, and compare it with the design reinforcement to confirm whether the floor slab is safe.

2. The safety verification method for cranes going up to floor slabs according to claim 1, characterized in that, In step 3, different working conditions include: 4 rows of wheel axles on the same floor slab, 3 rows of wheel axles on the same floor slab, 2 rows of wheel axles on the same floor slab, ..., only 1 row of wheel axles on the same floor slab.

3. The safety verification method for cranes going up to floor slabs according to claim 2, characterized in that, The specific process of step 3 is as follows: For the case where four rows of wheel axles are on the same floor slab: Let K be the location of the most unfavorable load, and let x be the distance between K and point A at the leftmost support. Let F be the load. PK When applied to K, the moment equilibrium equation at K is M. k (x) is: Differentiating the above equation, we get: In the formula, F represents PK Forces on the left floor slab relative to F PK The sum of the moments at the point of application; F R F is the resultant force of all forces located on the floor slab. Ay L represents the reaction force at point A; x w is the length of the floor slab; w is F R Location to F PK Distance from the location (the location of the most unfavorable load); Let formula (2) be zero, then (L x Given that -2x-w) is 0, find the value of x; Then, based on the most unfavorable load location and load value, the maximum bending moment |M| under each working condition is calculated. max :

4. The safety verification method for cranes going up to floor slabs according to claim 3, characterized in that, The calculation method for w is as follows: When all four rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the second and third wheel axles. At this point, w = (G3×d3 + G4×d4 - G1×d1 - G2×d2) / (G1 + G2 + G3 + G4). When the last three rows of wheel axles are on the same floor slab, the crane's center of gravity is set 1 meter to the left of the force of G3. At this point, w = (G3×d3 + G4×d4 - G2×d2) / (G2 + G3 + G4). When the first three rows of wheel axles are on the same floor slab, the crane's center of gravity is set 1 meter to the right and left of the force of G2. At this point, w = (G1×d1 + G2×d2 – G3×d4). 23 When the last two rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the 3rd and 4th wheel axles, at which point w = (G4 × d4 – G3 × d3) / (G3 + G4); When the first two rows of wheel axles are on the same floor slab, the crane's center of gravity is set at the midpoint of the line connecting the 1st and 2nd wheel axles, at which point w = (G1 × d1 – G2 × d2) / (G1 + G2); When the 1st row of wheel axles is on the same floor slab, the crane's center of gravity is set at the axis of the 1st row of wheel axles, at which point w = 0; When the 4th row of wheel axles is on the same floor slab, the crane's center of gravity is set at the axis of the 4th row of wheel axles, at which point w = 0; Wherein, G1, G2, G3, and G4 represent the axle loads of the 1st, 2nd, 3rd, and 4th rows of wheels, respectively; d4, d3, d2, and d1 represent the distances of the 4th, 3rd, 2nd, and 1st row of wheel axles from the crane's center of gravity, respectively.

5. The safety verification method for a crane going up a floor slab according to claim 4, characterized in that, Under different working conditions, the The calculation is as follows: When four rows of wheel axles are on the same floor slab When the axles of the last three rows of wheels are on the same floor slab, When the axles of the first three rows of wheels are on the same floor slab, When the axles of the last two rows of wheels are on the same floor slab, When the axles of the first two rows of wheels are on the same floor slab, When the axles of the fourth row of wheels are on the same floor slab... When the axles of the first row of wheels are on the same floor slab... Where g represents gravitational acceleration.

6. The safety verification method for a crane going up a floor slab according to claim 5, characterized in that, In step 4, during operation, the crane outriggers are extended, and the load is borne by the outriggers. Considering the worst-case scenario, the load is concentrated on the last row of outriggers. The formula for calculating the bending moment M is: Where F represents the outrigger load.

7. A system for implementing the safety verification method for a crane going up a floor slab as described in claim 1, characterized in that, include: The walking status analysis module receives manually collected and input floor slab parameters and crane parameters, performs working condition analysis, determines the most unfavorable load location and load value, calculates the maximum bending moment under different working conditions, and obtains the maximum bending moment that the floor slab can withstand through comprehensive comparison. The working status analysis module receives manually collected and input floor slab parameters and crane parameters, considers the worst-case scenario, and calculates the bending moment when the load is concentrated on the last row of outriggers. The floor slab reinforcement analysis module, combined with the values ​​calculated by the comprehensive walking state analysis module and the working state analysis module, determines the maximum bending moment, calculates the reinforcement, and compares the calculated reinforcement data with the pre-input actual floor slab reinforcement data to determine whether the floor slab reinforcement meets the requirements, and thus whether the floor slab is safe.

8. A computer storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements steps 3 to 5 of the safety verification method for the crane going up to the floor as described in claim 1.

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