Crawler crane operation slope stability analysis method and system

Abstract

The invention relates to the technical field of engineering construction, and discloses a crawler crane operation slope stability analysis method and system.The crawler crane operation slope stability analysis method comprises the steps that basic parameters of a crawler crane are obtained, and first grounding stress of the crawler crane in the construction process is determined based on the basic parameters; acquiring evaluation parameters of the target operation slope, and determining soil shear strength and soil shear stress of the target operation slope based on the evaluation parameters; calculating the safety coefficient of the target operation slope in the construction process of the crawler crane based on the first grounding stress, the soil shear strength and the soil shear stress, and analyzing the stability of the target slope based on the safety coefficient; according to the method, the stability of the operation slope of the crawler crane is visually determined by combining the parameters in the target operation slope with the basic parameters of the crawler crane.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction, and particularly to a method and system for analyzing the slope stability of crawler crane operations. Background Art

[0002] A crawler crane is the common name for a crawler-mounted crane. It mainly refers to a fully rotating boom crane with a crawler walking device, which has the advantages of large lifting capacity, the ability to lift and walk with heavy loads, and strong lifting ability. It often appears at construction sites that require large-scale lifting operations. The construction site of the crawler crane will change with the changing needs of engineering construction. Therefore, the construction site of the crawler crane will not always be on flat ground. When, due to the needs of engineering construction, the crawler crane operates on a slope environment, the construction load of the crawler crane will cause a very large pressure on the slope environment. The stability of the slope environment has always been an important issue at the construction site. Therefore, how to determine the stability of the slope during crawler crane operations is a very important aspect in crawler crane slope construction. Summary of the Invention

[0003] The present invention provides a method and system for analyzing the slope stability of crawler crane operations to determine the stability of the slope during crawler crane operations.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: In the first aspect, the present invention provides a method for analyzing the slope stability of crawler crane operations, including: Obtaining the basic parameters of the crawler crane, and determining the first ground stress of the crawler crane during construction based on the basic parameters; Obtaining the evaluation parameters of the target operation slope, and determining the shear strength and shear stress of the soil mass of the target operation slope based on the evaluation parameters; Calculating the safety factor of the target operation slope of the crawler crane during construction based on the first ground stress, the shear strength of the soil mass, and the shear stress of the soil mass, and analyzing the stability of the target slope based on the safety factor.

[0005] Optionally, the basic parameters include: the working weight of the crawler crane, the construction counterweight, the maximum lifting weight, and the crawler bottom area; Determining the first ground stress of the crawler crane during construction based on the basic parameters includes: Calculating the maximum load exerted by the crawler crane on the target slope during construction based on the working weight of the crawler crane, the construction counterweight, and the maximum lifting weight, and calculating the first ground stress of the crawler crane during construction through the maximum load and the crawler bottom area. The calculation formula satisfies the following relationship: ; In the formula, Q is the maximum load, Fn Denotes the construction counterweight, F G Denotes the working weight of the crawler crane, F s Denotes the maximum lifting weight; ; In the formula, is the first ground stress, Q denotes the maximum load, and S denotes the crawler bottom area.

[0006] Optionally, the evaluation parameters include: shear modulus and shear strain; The shear modulus is obtained through the small strain theory, and its calculation method satisfies the following relationship: ; In the formula, G is the shear modulus, is the shear strain, G 0 Denotes the initial shear modulus of the soil under small strain, a denotes the control parameter, Denotes the shear strain of the soil when the shear modulus of the soil is reduced to 70%, E is the elastic modulus of the soil, Denotes the Poisson's ratio of the soil, Denotes the small strain threshold; The shear strain includes: the shear strain at soil failure and the real-time shear strain of the soil; The shear strain at soil failure is obtained through a constant triaxial compression test. The real-time shear strain of the soil is obtained by setting an inclinometer in the soil of the target slope, using the inclinometer to obtain the deep horizontal displacement of the soil and the distance from the inclinometer tube in the inclinometer to the end point of the inclinometer inside the soil, and calculating the real-time shear strain of the soil based on the deep horizontal displacement of the soil and the distance from the inclinometer tube in the inclinometer to the end point of the inclinometer inside the soil. Its calculation method satisfies the following relationship: ; In the formula, is the real-time shear strain of the soil, Denotes the deep horizontal displacement of the soil, and z denotes the distance from the inclinometer tube to the end point of the inclinometer inside the soil.

[0007] Optionally, the initial shear modulus of the soil under small strain is obtained through a bending element test, and its calculation method satisfies the following relationship: ; In the formula, G 0 Denotes the initial shear modulus of the soil under small strain, Denotes the saturated density of the soil, Denotes the propagation wave velocity of the shear wave in the saturated soil, and , L is the sample height in the bending element experiment, and t is the propagation time.

[0008] Optionally, the soil shear strain corresponding to a 70% reduction in the soil shear modulus satisfies the following relationship: ; In the formula, represents the soil shear strain corresponding to a 70% reduction in the soil shear modulus, , both represent the effective strength index of the soil, represents the vertical effective stress of the soil, and K 0 is the coefficient of the at-rest lateral earth pressure.

[0009] Optionally, determining the shear strength and shear stress of the soil of the target working slope based on the evaluation parameters includes: Calculating the shear strength of the soil according to the shear modulus and the shear strain at the time of soil failure, and its calculation formula satisfies the following relationship: ; In the formula, represents the shear strength of the soil, G represents the shear modulus, represents the shear strain at the time of soil failure, represents the small strain threshold, is the shear strain; Calculating the shear stress of the soil according to the shear modulus and the real-time shear strain of the soil, and its calculation formula satisfies the following relationship: ; In the formula, represents the shear stress of the soil, G represents the shear modulus, is the real-time shear strain of the soil, represents the small strain threshold, is the shear strain.

[0010] Optionally, calculating the safety factor of the target working slope of the crawler crane during construction based on the first ground stress, the shear strength of the soil, and the shear stress of the soil includes: Substituting the first ground stress, the shear strength of the soil, and the shear stress of the soil into the safety factor calculation formula to calculate the safety factor of the target working slope of the crawler crane during construction, and its calculation formula satisfies the following relationship: ; In the formula, represents the safety factor, represents the shear strength of the soil, represents the shear stress of the soil, is the first ground stress.

[0011] Optionally, analyzing the stability of the target slope based on the safety factor includes: Determine the safety threshold according to the historical construction records, and compare the safety factor with the safety threshold. When the safety factor is greater than or equal to the safety threshold, it is determined that the stability of the target working slope meets the operation requirements of the crawler crane. When the safety factor is less than the safety threshold, it is determined that the stability of the target working slope does not meet the operation requirements of the crawler crane.

[0012] Optionally, the method further includes: Lay a gravel layer and a roadbed box between the crawler crane and the target working slope, and determine the second ground contact stress of the crawler crane during construction under the action of the gravel layer and the roadbed box. Calculate the safety factor of the target working slope of the crawler crane during construction based on the second ground contact stress, the shear strength of the soil mass, and the shear stress of the soil mass, and analyze the stability of the target slope based on the safety factor.

[0013] In a second aspect, an embodiment of the present application provides a stability analysis system for a crawler crane slope operation, including a processor and a memory; The memory is used to store a computer program; The processor is used to implement any of the method steps in the first aspect when executing the program stored on the memory.

[0014] Beneficial effects: The stability analysis method for a crawler crane slope operation provided by the present invention determines the first ground contact stress of the crawler crane during construction by obtaining the basic parameters of the crawler crane; and obtains the evaluation parameters of the target working slope to determine the shear strength of the soil mass and the shear stress of the soil mass of the target working slope; thereby calculating the safety factor of the target working slope of the crawler crane during construction based on the first ground contact stress, the shear strength of the soil mass, and the shear stress of the soil mass, and analyzing the stability of the target slope based on the safety factor; this method combines the parameters in the target working slope with the basic parameters of the crawler crane, more intuitively reflecting the real situation of the impact of the crawler crane on the slope during construction, and the parameters in this method only need to be obtained through conventional triaxial compression tests and bending element tests, and the parameter acquisition is simple and the applicable range is wide. Description of the drawings

[0015] Figure 1 It is a flowchart of the stability analysis method for a crawler crane slope operation according to a preferred embodiment of the present invention. Detailed implementation manners

[0016] The technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0017] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention pertains. The terms "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0018] Please refer to Figure 1 , an embodiment of the present application provides a method for analyzing the stability of a working slope of a crawler crane, including: Obtain the basic parameters of the crawler crane, and determine the first ground stress of the crawler crane during construction based on the basic parameters; Obtain the evaluation parameters of the target working slope, and determine the shear strength of the soil mass and the shear stress of the soil mass of the target working slope based on the evaluation parameters; Calculate the safety factor of the target working slope of the crawler crane during construction based on the first ground stress, the shear strength of the soil mass and the shear stress of the soil mass, and analyze the stability of the target slope based on the safety factor.

[0019] In the above embodiment, the first ground stress of the crawler crane during construction is determined by obtaining the basic parameters of the crawler crane; and the evaluation parameters of the target working slope are obtained to determine the shear strength of the soil mass and the shear stress of the soil mass of the target working slope; thereby calculating the safety factor of the target working slope of the crawler crane during construction according to the first ground stress, the shear strength of the soil mass and the shear stress of the soil mass, and analyzing the stability of the target slope based on the safety factor; this method more intuitively reflects the actual situation of the impact of the crawler crane on the slope during construction by combining the parameters in the target working slope with the basic parameters of the crawler crane, and the parameters in this method only need to be obtained through conventional triaxial compression tests and bending element tests, and the parameter acquisition is simple and the applicable range is wide.

[0020] Optionally, the basic parameters include: the working weight of the crawler crane, the construction counterweight, the maximum lifting weight, the area of the crawler bottom surface; Determining the first ground stress of the crawler crane during construction based on the basic parameters includes: Calculate the maximum load exerted by the crawler crane on the target slope during construction based on the working weight of the crawler crane, the construction counterweight, and the maximum lifting weight, and calculate the first ground stress of the crawler crane during construction through the maximum load and the crawler bottom area. The calculation formula satisfies the following relational expression: ; In the formula, Q is the maximum load, F n represents the construction counterweight, F G represents the working weight of the crawler crane, F s represents the maximum lifting weight; ; In the formula, is the first ground stress, Q represents the maximum load, and S represents the crawler bottom area.

[0021] Optionally, the evaluation parameters include: shear modulus and shear strain; The shear modulus is obtained through the small strain theory, and its calculation method satisfies the following relational expression: ; In the formula, G is the shear modulus, is the shear strain, G 0 represents the initial shear modulus of the soil under small strain, a represents the control parameter, represents the shear strain of the soil corresponding to the reduction of the soil shear modulus to 70%, E is the elastic modulus of the soil, represents the Poisson's ratio of the soil, represents the small strain threshold; The shear strain includes: the shear strain at soil failure and the real-time shear strain of the soil; The shear strain at soil failure is obtained through a constant triaxial compression test. The real-time shear strain of the soil is obtained by setting an inclinometer in the soil of the target slope, using the inclinometer to obtain the deep horizontal displacement of the soil and the distance from the inclinometer tube in the inclinometer to the end point of the inclinometer inside the soil, and calculating the real-time shear strain of the soil based on the deep horizontal displacement of the soil and the distance from the inclinometer tube in the inclinometer to the end point of the inclinometer inside the soil. Its calculation method satisfies the following relational expression: ; In the formula, is the real-time shear strain of the soil, represents the deep horizontal displacement of the soil, and z represents the distance from the inclinometer tube to the end point of the inclinometer inside the soil.

[0022] Optionally, the initial shear modulus of the soil under small strain is obtained through a bending element test, and its calculation method satisfies the following relational expression: ; In the formula, G0 represents the initial shear modulus of the soil mass at small strain, represents the saturated density of the soil mass, represents the propagation wave velocity of shear waves in the saturated soil mass, and , where L is the height of the specimen in the bender element test and t is the propagation time.

[0023] Optionally, the shear strain of the soil mass corresponding to a 70% reduction in the shear modulus of the soil mass satisfies the following relationship: ; In the formula, represents the shear strain of the soil mass corresponding to a 70% reduction in the shear modulus of the soil mass, , both represent the effective strength indexes of the soil mass, represents the vertical effective stress of the soil mass, and K 0 is the coefficient of earth pressure at rest.

[0024] Optionally, determining the shear strength and shear stress of the soil mass of the target working slope based on the evaluation parameters includes: Calculating the shear strength of the soil mass according to the shear modulus and the shear strain at the time of soil mass failure, and its calculation formula satisfies the following relationship: ; In the formula, represents the shear strength of the soil mass, G represents the shear modulus, represents the shear strain at the time of soil mass failure, represents the small strain threshold, is the shear strain; Calculating the shear stress of the soil mass according to the shear modulus and the real-time shear strain of the soil mass, and its calculation formula satisfies the following relationship: ; In the formula, represents the shear stress of the soil mass, G represents the shear modulus, is the real-time shear strain of the soil mass, represents the small strain threshold, is the shear strain.

[0025] Optionally, calculating the safety factor of the target working slope of the crawler crane during construction based on the first ground stress, the shear strength of the soil mass, and the shear stress of the soil mass includes: Substituting the first ground stress, the shear strength of the soil mass, and the shear stress of the soil mass into the safety factor calculation formula to calculate the safety factor of the target working slope of the crawler crane during construction, and its calculation formula satisfies the following relationship: ; In the formula, represents the safety factor, represents the shear strength of the soil mass, represents the shear stress of the soil mass, is the first ground stress.

[0026] Optionally, the analysis of the stability of the target slope based on the safety factor includes: Determine a safety threshold according to the historical construction records, and compare the safety factor with the safety threshold. When the safety factor is greater than or equal to the safety threshold, it is determined that the stability of the target working slope meets the operating requirements of the crawler crane. When the safety factor is less than the safety threshold, it is determined that the stability of the target working slope does not meet the operating requirements of the crawler crane.

[0027] Optionally, the method further includes: Lay a gravel layer and a roadbed box between the crawler crane and the target working slope, and determine the second ground stress of the crawler crane during construction under the action of the gravel layer and the roadbed box. Calculate the safety factor of the target working slope of the crawler crane during construction based on the second ground stress, the shear strength of the soil mass, and the shear stress of the soil mass, and analyze the stability of the target slope based on the safety factor.

[0028] The embodiment of the present application further provides a crawler crane working slope stability analysis system, including a processor and a memory; The memory is used to store computer programs; The processor is used to implement any of the method steps in the crawler crane working slope stability analysis method when executing the programs stored on the memory.

[0029] The above-mentioned crawler crane working slope stability analysis system can implement each embodiment of the above-mentioned crawler crane working slope stability analysis method, and can achieve the same beneficial effects. Here, it will not be elaborated.

[0030] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present application based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A crawler crane operation slope stability analysis method, characterized in that: include: Acquire basic parameters of the crawler crane, and determine a first ground stress of the crawler crane during the construction process based on the basic parameters; Acquiring evaluation parameters of the target working slope, and determining the soil shear strength and soil shear stress of the target working slope based on the evaluation parameters; The safety factor of the target working slope of the crawler crane during the construction process is calculated based on the first ground stress, the soil shear strength and the soil shear stress, and the stability of the target slope is analyzed based on the safety factor.

2. The crawler crane operation slope stability analysis method according to claim 1 is characterized in that: The basic parameters include: crawler crane working weight, construction counterweight, maximum lifting weight, crawler bottom area; Determining the first ground stress of the crawler crane during the construction process based on the basic parameters includes: The maximum load applied by the crawler crane to the target slope during the construction process is calculated based on the working weight of the crawler crane, the construction counterweight, and the maximum hoisting weight, and the first ground stress of the crawler crane during the construction process is calculated by the maximum load and the bottom area of ​​the crawler, and the calculation formula satisfies the following relationship: ； Where Q is the maximum load, F n Indicates construction weight, F G Indicates the crawler crane's operating weight, F s Indicates the maximum lifting weight; ； In the formula, is the first ground stress, Q is the maximum load, and S is the track bottom area.

3. The crawler crane operation slope stability analysis method according to claim 1 is characterized in that: The evaluation parameters include: shear modulus and shear strain; The shear modulus is obtained by small strain theory, and its calculation method satisfies the following relationship: ； Where G is the shear modulus, is the shear strain, G0 represents the initial shear modulus of soil with small strain, a represents the control parameter, It represents the soil shear strain corresponding to when the soil shear modulus is reduced to 70%, E is the soil elastic modulus, is the soil Poisson’s ratio, represents the small strain threshold; The shear strain includes: the shear strain when the soil is destroyed and the real-time shear strain of the soil; The shear strain at the time of soil failure is obtained through a normal triaxial compression test. The real-time shear strain of the soil is obtained by setting an inclinometer in the target slope soil, using the inclinometer to obtain the deep horizontal displacement of the soil and the distance from the inclinometer tube in the inclinometer to the end point of the inclinometer inside the soil, and calculating the real-time shear strain of the soil based on the deep horizontal displacement of the soil and the distance from the inclinometer tube in the inclinometer to the end point of the inclinometer inside the soil. The calculation method satisfies the following relationship: ； In the formula, is the real-time shear strain of soil, represents the horizontal displacement of the deep layer of soil, and z represents the distance from the inclined tube to the end point of the inclinometer inside the soil.

4. The crawler crane operation slope stability analysis method according to claim 3 is characterized in that: The soil small strain initial shear modulus is obtained through bending element test, and its calculation method satisfies the following relationship: ； In the formula, G0 represents the initial shear modulus of soil with small strain, is the saturated density of soil, represents the propagation velocity of shear waves in saturated soil, and , L is the sample height in the bending element experiment, and t is the propagation time.

5. The crawler crane operation slope stability analysis method according to claim 3 is characterized in that: When the soil shear modulus is reduced to 70%, the corresponding soil shear strain satisfies the following relationship: ； In the formula, It represents the soil shear strain corresponding to the soil shear modulus decreasing to 70%. , Both represent the effective strength index of soil. represents the vertical effective stress of soil, and K0 is the static lateral pressure coefficient.

6. The crawler crane operation slope stability analysis method according to claim 3 is characterized in that: Determining the soil shear strength and soil shear stress of the target working slope based on the evaluation parameters includes: The soil shear strength is calculated according to the shear modulus and the shear strain when the soil is destroyed, and the calculation formula satisfies the following relationship: ； In the formula, represents the shear strength of soil, G represents the shear modulus, represents the shear strain at soil failure, represents the small strain threshold, is the shear strain; The soil shear stress is calculated according to the shear modulus and the real-time shear strain of the soil, and the calculation formula satisfies the following relationship: ； In the formula, represents the soil shear stress, G represents the shear modulus, is the real-time shear strain of soil, represents the small strain threshold, is the shear strain.

7. The crawler crane operation slope stability analysis method according to claim 1 is characterized in that: The method of calculating the safety factor of the target working slope of the crawler crane during the construction process based on the first ground stress, the soil shear strength and the soil shear stress includes: Substituting the first ground stress, the soil shear strength and the soil shear stress into the safety factor calculation formula, the safety factor of the target working slope of the crawler crane during the construction process is calculated, and the calculation formula satisfies the following relationship: ； In the formula, represents the safety factor, is the shear strength of soil, represents the soil shear stress, is the first ground stress.

8. The crawler crane operation slope stability analysis method according to claim 1 is characterized in that: The analyzing the stability of the target slope based on the safety factor includes: A safety threshold is determined based on historical construction records, and the safety factor is compared with the safety threshold. When the safety factor is greater than or equal to the safety threshold, it is judged that the stability of the target operating slope meets the crawler crane operation requirements. When the safety factor is less than the safety threshold, it is judged that the stability of the target operating slope does not meet the crawler crane operation requirements.

9. The crawler crane slope operation stability analysis method according to claim 1, characterized in that: The method further comprises: A gravel layer and a roadbed box are laid between the crawler crane and the target working slope, and the second ground stress of the crawler crane during the construction process under the action of the gravel layer and the roadbed box is determined, and the safety factor of the target working slope of the crawler crane during the construction process is calculated based on the second ground stress, the soil shear strength and the soil shear stress, and the stability of the target slope is analyzed based on the safety factor.

10. A crawler crane slope operation stability analysis system, characterized in that: Including processor and memory; Memory, used to store computer programs; A processor, for implementing the method steps described in any one of claims 1 to 9 when executing a program stored in a memory.

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