Vibro-replacement stone column composite foundation quality evaluation method based on analytic hierarchy process

Abstract

The invention discloses a vibro-replacement stone column composite foundation quality evaluation method based on an analytic hierarchy process. The method comprises the following steps: constructing a multi-dimensional analysis model; four master control influence factors of quality evaluation are obtained based on the multi-dimensional analysis model; obtaining the weight of each influence factor based on an analytic hierarchy process; obtaining a normalized thematic map of each influence factor evaluation index based on a Kriging interpolation method; superposing the normalized thematic maps based on a GIS superposition coupling function to obtain a quality quantification index type partition evaluation map of the whole area of the composite foundation; and carrying out partition evaluation on the quality of the vibro-replacement stone column composite foundation in the whole region. According to the method, the multi-dimensional analysis model is constructed to obtain the weight of each influence factor, so that the evaluation is comprehensive, and the error of the evaluation result is greatly reduced; the influence factors are coupled in the same graph and are subjected to partition evaluation, so that the evaluation precision of the processed foundation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite foundation supporting technologies, and particularly relates to a method for evaluating the quality of vibroflotation gravel pile composite foundation based on the analytic hierarchy process. Background Art

[0002] Due to its poor soil mechanical properties, the soft overburden layer cannot meet the requirements as a dam foundation. To improve the bearing capacity of the foundation, vibroflotation piles are often used to treat the foundation, and after treatment, it is usually necessary to evaluate the quality of the composite foundation.

[0003] In the conventional evaluation process, tests such as static load tests on composite foundations, dynamic penetration tests, standard penetration tests, and indoor direct shear tests need to be carried out. When evaluating, only a single index of a certain test result is used to evaluate the quality of the vibroflotation gravel pile composite foundation.

[0004] However, due to the fact that the existing evaluation method uses a single index, and is affected by the technical level and experience of the evaluator and does not consider the fuzziness and randomness between various evaluation indexes, the evaluation result is greatly affected by personal subjectivity, the evaluation is not comprehensive, and the evaluation result is one-sided, resulting in a large error in the evaluation result and being unable to truly reflect the quality of the vibroflotation gravel pile composite foundation based on multiple test information sources. Moreover, the existing evaluation method has a single dimension and cannot carry out zonal evaluation and grading of the quality of the composite foundation in the whole area. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method for evaluating the quality of vibroflotation gravel pile composite foundation based on the analytic hierarchy process, aiming to solve the technical problems that the evaluation result of the existing technology often has a large error and cannot carry out zonal evaluation and grading of the quality of the composite foundation in the whole area.

[0006] To achieve the above purpose, the present invention provides a method for evaluating the quality of vibroflotation gravel pile composite foundation based on the analytic hierarchy process. The method includes the following steps: S10, constructing a multi-dimensional analysis model; S20, obtaining four main control influencing factors for quality evaluation based on the multi-dimensional analysis model; S30, obtaining the weights of each influencing factor based on the analytic hierarchy process; S40, obtaining the normalized thematic maps of the evaluation indexes of each influencing factor based on the Kriging interpolation method; S50, overlaying the normalized thematic maps based on the GIS overlay coupling function to obtain a quality quantization index type zonal evaluation map of the composite foundation in the whole area; S60, dividing and grading the quality quantization index type zonal evaluation map, so as to carry out zonal evaluation on the quality of the vibroflotation gravel pile composite foundation in the whole area.

[0007] Optionally, step S10 includes the following steps: S110, conducting a static load test on the composite foundation; S120, evaluating the integrity and density of the vibroflotation gravel pile; S130, constructing a multi-dimensional analysis model based on the test and evaluation results.

[0008] Optionally, step S30 includes: S310, based on the Delphi method, technical experts score the influencing factors according to the 1-9 scale method; S320, based on the scoring results and the bottom-layer quality evaluation influencing factor indicators, construct an index weight vector; S330, based on the analytic hierarchy process, obtain the weights of the influencing factors.

[0009] Optionally, step S40 includes: S410, perform dimensionless and normalized data processing on the influencing factor indicators; S420, multiply the dimensionless and normalized data processed influencing factor indicators by the combined weights of the determined influencing factors; S430, based on Kriging interpolation, use the numerical analysis ability of GIS to obtain the normalized thematic maps of the evaluation indicators of the influencing factors.

[0010] Optionally, step S50 includes: S510, based on the GIS information fusion overlay coupling function, overlay the normalized thematic maps; S520, obtain the quality quantitative index type zoning evaluation map of the entire area of the composite foundation.

[0011] Optionally, step S60 includes: S610, classify the index values based on the dynamic natural classification method, and divide them into five levels according to different thresholds; S620, based on the classification results, divide the quality evaluation map of the entire area into high-quality area, relatively high-quality area, transition area, general area, and warning area of the foundation treatment quality.

[0012] Optionally, step S330 includes: S331, based on the analytic hierarchy process, establish an analytic hierarchy process diagram of the influencing factors of the vibroflotation gravel pile composite foundation quality to obtain the weights of the influencing factors; S332, construct a judgment matrix and perform consistency test.

[0013] Optionally, step S332 includes: S3321, construct a judgment matrix; S3322, verify the consistency of the hierarchical total sorting matrix formed by the judgment matrix.

[0014] In addition, to achieve the above object, an embodiment of the present application further provides a vibroflotation gravel pile composite foundation quality evaluation device based on the analytic hierarchy process. The device includes: a construction module for constructing a multi-dimensional analysis model; an influencing factor acquisition module for obtaining four main control influencing factors for quality evaluation based on the multi-dimensional analysis model; a weight acquisition module for obtaining the weights of the influencing factors based on the analytic hierarchy process; a thematic map acquisition module for obtaining the normalized thematic maps of the evaluation indicators of the influencing factors based on Kriging interpolation; an overlay module for overlaying the normalized thematic maps based on the GIS overlay coupling function to obtain the quality quantitative index type zoning evaluation map of the entire area of the composite foundation; a quality evaluation module for classifying and grading the quality quantitative index type zoning evaluation map, so as to perform zoning evaluation on the quality of the vibroflotation gravel pile composite foundation in the entire area.

[0015] In addition, to achieve the above object, an embodiment of the present application further provides a computer-readable storage medium, which includes instructions that, when running on a computer, cause the computer to execute the vibroflotation stone column composite foundation quality evaluation method of any embodiment of the present application.

[0016] In addition, to achieve the above object, an embodiment of the present application further provides a computing device, which includes: at least one processor, a memory, and an input / output unit; wherein, the memory is used to store a computer program, and the processor is used to call the computer program stored in the memory to execute the vibroflotation stone column composite foundation quality evaluation method of any embodiment of the present application.

[0017] The vibroflotation stone column composite foundation quality evaluation method based on the analytic hierarchy process provided by the embodiment of the present application constructs a multi-dimensional analysis model to obtain four main control influencing factors for quality evaluation, so as to obtain the weights of each influencing factor, making the evaluation comprehensive, greatly reducing the error of the evaluation result, and being able to truly reflect the quality of the vibroflotation stone column composite foundation based on multiple test information sources; through the GIS overlay coupling function, each influencing factor is coupled in the same graph and evaluated by region, which solves the problem of single-dimensional quality evaluation to a certain extent, can realize the grading evaluation of the whole region by region, improves the accuracy of the post-treatment foundation evaluation, provides specific and visual guidance for the acceptance and re-treatment of the composite foundation, and provides a new solution for the evaluation of the composite foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flowchart of the vibroflotation stone column composite foundation quality evaluation method based on the analytic hierarchy process provided by one or more embodiments of the present application; Figure 2 It is a structural block diagram of the vibroflotation stone column composite foundation quality evaluation device provided by one or more embodiments of the present application; Figure 3 It is a hierarchical structure model of the vibroflotation stone column composite foundation quality evaluation provided by one or more embodiments of the present application; Figure 4 It is a composite foundation quality evaluation zoning map provided by one or more embodiments of the present application; Figure 5 It is a structural schematic diagram of the medium provided by an embodiment of the present application; Figure 6 It is a structural schematic diagram of the computing device provided by an embodiment of the present application.

[0019] The realization, functional characteristics, and advantages of the object of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] It should be understood that the specific embodiments described herein are merely for explaining the present application and are not used to limit the present application. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0021] Those skilled in the art know that the embodiments of the present application can be implemented as a system, device, equipment, method, or computer program product. Therefore, the present application can be specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0022] The embodiments of the present application provide a method for evaluating the quality of vibroflotation gravel pile composite foundation based on the analytic hierarchy process, and this method can be executed by a computer, such as Figure 1 as shown, this method may include the following steps: S10, construct a multi-dimensional analysis model.

[0023] In an exemplary embodiment, step S10 may include the following steps: S110, conduct a static load test on the composite foundation; S120, evaluate the detection factors of the direct shear test in the laboratory; S130, evaluate the integrity and density of the pile body; S140, evaluate the treatment effect of the soil between piles; S150, evaluate the engineering geological conditions.

[0024] Specifically, the overall process of the static load test on the composite foundation is described as follows: In the static load test of the composite foundation, according to the service function of the pile, axial pressure is gradually applied to the pile top, and the settlement of the corresponding detection points of the pile over time is observed. According to the relationship between the load and displacement (i.e., the Q-S curve), the corresponding vertical compressive bearing capacity is determined. This test method uses various artificial loading methods to simulate the actual working state of the foundation or foundation, and tests its bearing performance and deformation characteristics after loading. The static load test of the composite foundation is used to determine the bearing capacity and deformation parameters of the composite soil layer within the main stress influence range under the bearing plate. The determination of this influencing factor takes the cumulative settlement value at each point under the maximum load condition and the bearing capacity characteristic value determined for each test pile as analysis indicators. The composite foundation bearing capacity is the basis for judging the quality of the vibroflotation gravel pile foundation and is positively correlated with the quality of the composite foundation. The cumulative settlement of the pile body under the maximum load is negatively correlated with the quality of the composite foundation.

[0025] Next, the evaluation process of the detection factors of the direct shear test in the laboratory will be specifically elaborated: First, fix the upper and lower boxes of the direct shear. Install a slitting device on the lower shear box, and place an impermeable plate at the bottom of the shear box. Then, evenly load the weighed specimens into the specimen box in layers, compact them to the relative height of the controlled density, plane the surface after shaving the surface, and then fill the second layer and level the surface. Finally, collect the construction density of the pile body during the on-site vibroflotation pile construction, draw a curve of the relationship between shear stress and horizontal shear displacement according to the results of the indoor shear test, draw a curve of the relationship between vertical stress and shear stress under different on-site density conditions, and analyze the test data to obtain the shear strength (c) and internal friction angle (φ) values. The specification stipulates that the peak or stable value on the curve of the relationship between shear stress and horizontal displacement is taken as the shear strength. If there is no obvious peak, the shear stress at the point where the horizontal displacement reaches the specimen diameter is taken as the shear strength. Take the shear stress at one-tenth as the shear strength. The shear strength of the pile body in this case uniformly adopts the shear strength τ under the vertical stress σ = 800 kPa. The determination of this influence factor takes the shear strength under different on-site densities as the analysis index. Under the same vertical stress condition, the greater the shear strength of the pile body, the better the quality of the vibroflotation gravel pile foundation. Therefore, the shear strength of the pile body is positively correlated with the quality of the composite foundation.

[0026] Next, the evaluation of the integrity and density of the pile body will be specifically described: According to the specification standards of the "Technical Specification for Foundation Treatment by Vibroflotation Method in Hydropower and Water Conservancy Projects" (DL / 5214 - 2005), the "Code for Geotechnical Investigation" (GB50021 - 2001), and the "Technical Specification for Building Foundation Treatment" (JGJ79 - 2012), the integrity and density of the enhanced body of the gravel pile granular material composite foundation are inspected by the cone penetration test.

[0027] Cone penetration test uses a certain hammering kinetic energy to drive a cone probe of a certain specification into the soil, discriminates the changes in soil layers according to the resistance when driving into the soil, makes a mechanical stratification of the soil layer, determines the physical properties of the soil layer, and makes an engineering geological evaluation of the foundation soil. In practice, the number of hammer blows for penetrating a certain depth into the soil layer is often used as the test index of the cone penetration test. The pile body density can reflect the integrity of the pile body itself and an important index of the pile body bearing capacity. The greater the pile body density, the higher the pile body bearing capacity. Therefore, the pile body density is positively correlated with the quality of the composite foundation. The pile body integrity is positively correlated with the quality of the composite foundation.

[0028] Furthermore, the evaluation process of the treatment effect of the soil between piles is as follows: For the vibroflotation gravel pile with granular material as the enhanced body, since the bearing capacity of the pile body cannot be directly measured, the detection of the soil between piles has become the key point of the detection. The detection of the soil between piles is mainly the standard penetration test and indoor geotechnical tests.

[0029] The relative density of various sands is determined according to the number of hammer blows in the standard penetration test. The standards in the "Code for Geotechnical Investigation" (GB50021 - 2001) are as follows: (1) When the number of blows is less than 10, the sand is in a loose state; (2) When the number of blows is less than or equal to 15 and greater than or equal to 10, the sand is in a slightly dense state; (3) When the number of blows is less than or equal to 30 and greater than 15, the sand is in a medium - dense state; (4) When the number of blows is greater than 30, the sand is in a dense state. The standard penetration number is positively correlated with the quality of the composite foundation.

[0030] The indoor test results of the soil between piles are analyzed using mathematical statistics methods. The porosity, shear test, and compression test of the soil between piles are mainly analyzed. The better the physical and mechanical properties of the soil between piles, the more positively correlated it is with the quality of the composite foundation.

[0031] In addition, the evaluation results of the engineering geological conditions are as follows: The better the pile - end bearing layer of the engineering geological conditions, the better the quality of the composite foundation after treatment. Therefore, the pile - end bearing layer is positively correlated with the quality of the composite foundation.

[0032] S20, Four main control influencing factors for quality evaluation are obtained based on the multi - dimensional analysis model.

[0033] Specifically, the influencing factors include the vibro - replacement pile body condition B1, the treatment effect of the soil between piles B2, the static load characteristics of the composite foundation B3, and the engineering geological conditions B4.

[0034] Furthermore, the vibro - replacement pile body condition B1 includes the integrity of the pile body size C1, the shear strength of the pile body C2, and the number of blows in the dynamic penetration test C3. The treatment effect of the soil between piles B2 includes the standard penetration number C4 and the physical and mechanical properties of the soil between piles C5. The static load characteristics of the composite foundation B3 include the cumulative settlement of the pile body under the maximum load C6 and the characteristic value of the bearing capacity of the composite foundation C7. The engineering geological conditions B4 include the characteristics of the pile - end bearing layer C8.

[0035] S30, The weights of the influencing factors are obtained based on the analytic hierarchy process.

[0036] In an exemplary embodiment, step S30 may include the following steps: S310, Based on the Delphi method, technical experts score the influencing factors according to the 1 - 9 scale method; S320, Based on the scoring results and the indicators of the bottom - layer quality evaluation influencing factors, an index weight vector is constructed; S330, The weights of the influencing factors are obtained based on the analytic hierarchy process.

[0037] Among them, the Delphi method, also known as the expert survey method, is a method for obtaining prediction results by soliciting expert opinions through multiple rounds of anonymous means. The 1-9 scale method is a tool used in the analytic hierarchy process to quantify the relative importance between various indicators. This method constructs a judgment matrix by using the numbers from 1 to 9 and their reciprocals to compare the relative importance between different factors.

[0038] Specifically, the analytic hierarchy process is a practical decision-making method that combines qualitative analysis and quantitative analysis. It decomposes complex problems into several levels, forming a progressive hierarchical structure, greatly simplifying the problem analysis process. It has the advantages of simplicity, systematicness, reliability, etc.

[0039] In an exemplary embodiment, step S330 may include: S331, establishing an analytic hierarchy process diagram of the influencing factors of the vibroflotation gravel pile composite foundation quality based on the analytic hierarchy process to obtain the weights of each of the influencing factors; S332, constructing a judgment matrix and performing a consistency test.

[0040] Among them, the analytic hierarchy process mainly takes the quality evaluation of the vibroflotation gravel pile composite foundation in the study area as the target layer (layer A), the pile body conditions of the vibroflotation pile, the treatment effect of the soil between piles, the static load characteristics of the composite foundation, and the engineering geological conditions as the intermediate layer (layer B) that affects the factors at layer A. Each specific influencing factor constitutes the decision-making layer (layer C) of this model according to its subordination relationship to the main control influencing factor. Based on this, an analytic hierarchy process diagram of the influencing factors of the vibroflotation gravel pile composite foundation quality as shown in Figure 3 is established.

[0041] In an exemplary embodiment, step S332 includes: S3321, constructing a judgment matrix; S3322, verifying the consistency of the hierarchical total sorting matrix formed by the judgment matrix.

[0042] Specifically, the specific process of constructing a judgment matrix and performing a consistency test is as follows: (1) Constructing a judgment matrix: Make pairwise judgments on the indicators of the criterion layer to determine the weights of each criterion layer for the target layer. Taking m samples and n evaluation indicators as an example, construct an initial index matrix A: (1) Among them, i and j are the row and column of the matrix respectively, and the elements in A satisfy the following formula: (2) In the formula: a ij is the index element; a kj is the jth index element of the kth layer; w i is the weight of each influencing factor.

[0043] For the factors of the quality of vibroflotation gravel pile composite foundation determined according to test data, the Delphi expert consultation method was used to solicit opinions from the expert group in the form of letters. Through several rounds of information exchange and feedback correction, the opinions of each expert were gradually made consistent to obtain a collective judgment result with a high accuracy rate, and the quantitative values of the influencing factors were given by the method of expert consultation scoring. Based on the on-site production practice experience and scientific research experience, the above-mentioned influencing factors were scored and quantified, the cumulative scores were statistically calculated, and the total scores of each factor were compared to form a judgment set of each influencing factor by the experts. Thus, the judgment matrices for the AHP evaluation of the quality of vibroflotation gravel pile composite foundation in this area were constructed (as shown in Tables 1 - 4). The weights of the determined influencing factors are shown in Table 5.

[0044] Table 1 Judgment matrix A - Bi (i = 1 - 4)

[0045] Table 2 Judgment matrix B1 - Ci (i = 1 - 3)

[0046] Table 3 Judgment matrix B2 - Ci (i = 4 - 5)

[0047] Table 4 Judgment matrix B3 - Ci (i = 6 - 7)

[0048] Table 5 Weights of influencing factors determined by AHP

[0049] Among them, in Table 1, CI = 0.0117, λ max = 4.0457; in Table 2, CI = 0.0176, λ max = 3.0183; In Table 3, CI = 0, λ max = 2; in Table 4, CI = 0, λ max = 2. CI is the single - sorting consistency index, and λ max is the single - sorting maximum eigenvalue.

[0050] (2) Verify the consistency of the hierarchical total - sorting matrix based on the following formula: (3) In the formula: CR is the hierarchical total - sorting consistency ratio; CI i is the single - sorting consistency index; RI i is the single - sorting average random consistency index; W A / B I is the hierarchical total - sorting weight.

[0051] According to the set confidence level consistency judgment criterion: if CR < 0.10, it is considered that the determination of the weight coefficient of the judgment matrix meets the accuracy requirements. After calculation, CR is 0.0145 < 0.10, meeting the accuracy requirements.

[0052] S40. Obtain the normalized thematic maps of the evaluation indexes of each of the influencing factors based on the Kriging interpolation method.

[0053] In an exemplary embodiment, step S40 may include the following steps: S410. Perform dimensionless and normalized data processing on the influencing factor indexes; S420. Multiply the influencing factor indexes after dimensionless and normalized data processing by the combined weights of the determined influencing factors; S430. Based on the Kriging interpolation method, use the numerical analysis ability of GIS to obtain the normalized thematic maps of the evaluation indexes of each of the influencing factors.

[0054] Specifically, to eliminate the influence of different dimensions in the quantification process of different influencing factors and facilitate the statistical superposition and comprehensive evaluation of influencing factors, the study uses the maximum value normalization formula described in the following formula for dimensionless data processing: (4) In the formula: A i is the data after dimensionless data processing; a and b are respectively the lower limit and upper limit of the normalization range. In this embodiment, a = 0 and b = 1; minx i is the minimum value of the quantification values of each main control factor; maxx i is the maximum value of the quantification values of each main control factor.

[0055] Furthermore, the Kriging interpolation method is a spatial interpolation method based on the covariance function, mainly used for spatial modeling and prediction of random processes or random fields.

[0056] S50. Superimpose the normalized thematic maps based on the GIS superposition and coupling function to obtain the quality quantification index type zoning evaluation map of the entire area of the composite foundation.

[0057] In an exemplary embodiment, step S50 may include the following steps: S510. Based on the GIS information fusion, superposition and coupling function, superimpose the normalized thematic maps; S520. Obtain the quality quantification index type zoning evaluation map of the entire area of the composite foundation.

[0058] In this exemplary embodiment, the integrated analysis module of the GIS (Geographic Information System) multiplies the data of eight influencing factors affecting the quality of vibroflotation gravel pile composite foundation by the weights after combined weighting and then performs superposition coupling. The calculated index value is used to reflect the quality evaluation of the vibroflotation gravel pile composite foundation. The calculation formula is as described in formula (10), where positive correlation is addition and negative correlation is subtraction. The larger the calculated value W, the better the treatment effect of the vibroflotation gravel pile composite foundation. Thus, it comprehensively reflects the quality evaluation of the vibroflotation gravel pile composite foundation, and based on this, the quality zoning of the vibroflotation gravel pile composite foundation is carried out.

[0059] (5) In the formula: W is the quality index; W i is the weight of the influencing factor; f i (x, y) is the single-factor influence value function; x, y are geographical coordinates; i is the number of influencing factors.

[0060] S60. Divide and grade the quality quantification index type zoning evaluation map, so as to conduct a zonal evaluation of the quality of the vibroflotation gravel pile composite foundation in the whole region. The composite foundation quality zoning grade map is specifically as Figure 4 shown.

[0061] In the exemplary embodiment, step S60 may include the following steps: S610. Grade the index value based on the dynamic natural grading method, and divide it into five grades according to different thresholds; S620. Based on the grading results, divide the whole-region quality evaluation map into a high-quality area for foundation treatment, a relatively high-quality area, a transition area, an average area, and a warning area.

[0062] Specifically, in this embodiment, a zonal evaluation is carried out on the uniformity of the quality of the treated composite foundation in this region. By using the powerful data management and spatial analysis functions and information fusion technology of GIS, an information fusion type composite foundation quality quantification index type zoning evaluation oriented to GIS is created. Through this vibroflotation gravel pile composite foundation quality index zoning map, the quality balance of the foundation treated by the vibroflotation piles here and the risk of settlement in different areas of the treated foundation can be zoned. According to the results of model statistics, the index value is graded according to the dynamic natural grading method, so as to determine the zoning thresholds of 0.245, 0.409, 0.483, 0.545, and 0.612, and then divided into five grades according to different thresholds: a high-quality area for foundation treatment, a relatively high-quality area, a transition area, an average area, and a warning area.

[0063] The method for evaluating the quality of vibroflotation gravel pile composite foundation based on the analytic hierarchy process provided by the above embodiments constructs a multi-dimensional analysis model to obtain four main control influencing factors for quality evaluation, so as to obtain the weights of each influencing factor, making the evaluation comprehensive and greatly reducing the error of the evaluation result, and can truly reflect the quality of the vibroflotation gravel pile composite foundation based on multiple test information sources. By using the GIS overlay coupling function to couple each influencing factor in the same graph and conduct zonal evaluation, to a certain extent, it solves the problem of single-dimensional quality evaluation, can realize the zonal evaluation and grading of the entire area, improves the accuracy of the post-treatment foundation evaluation, provides specific and visual guidance for the acceptance and re-treatment of the composite foundation, and provides a new solution for the evaluation of the composite foundation.

[0064] Based on the above embodiments, with reference to Figure 2 , another embodiment of the present application further provides a device for evaluating the quality of vibroflotation gravel pile composite foundation based on the analytic hierarchy process. The device 200 for evaluating the quality of vibroflotation gravel pile composite foundation may include the following modules: A construction module 210, configured to construct a multi-dimensional analysis model; An influencing factor acquisition module 220, configured to obtain four main control influencing factors for quality evaluation based on the multi-dimensional analysis model; A weight acquisition module 230, configured to obtain the weights of each of the influencing factors based on the analytic hierarchy process; A thematic map acquisition module 240, configured to obtain a normalized thematic map of the evaluation indexes of each of the influencing factors based on the Kriging interpolation method; An overlay module 250, configured to overlay the normalized thematic maps based on the GIS overlay coupling function to obtain a quality quantization index type zonal evaluation map of the entire area of the composite foundation; A quality evaluation module 260, configured to divide and grade the quality quantization index type zonal evaluation map, so as to conduct a zonal evaluation on the quality of the vibroflotation gravel pile composite foundation in the entire area.

[0065] With reference to Figure 5, which shows that the computer-readable storage medium is an optical disc 50, on which a computer program (i.e., program product) is stored. When the computer program is run by a processor, it will implement the steps recorded in the above method embodiments. For example, constructing a multi-dimensional analysis model; obtaining four main control influencing factors for quality evaluation based on the multi-dimensional analysis model; obtaining the weights of each of the influencing factors based on the analytic hierarchy process; obtaining a normalized thematic map of the evaluation index of each of the influencing factors based on the Kriging interpolation method; overlaying the normalized thematic maps based on the GIS overlay coupling function to obtain a quality quantitative index type zoning evaluation map for the entire area of the composite foundation; dividing and grading the quality quantitative index type zoning evaluation map, so as to conduct a zoning evaluation on the quality of the vibro gravel pile composite foundation in the entire area. The specific implementation manners of each step will not be repeated here.

[0066] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other optical and magnetic storage media, which will not be elaborated one by one here.

[0067] In addition, based on the above embodiments, the embodiments of the present application further provide a computing device. Figure 6 The block diagram of an exemplary computing device 60 suitable for implementing the embodiments of the present application is shown. The computing device 60 may be a computer system or a server. Figure 6 The shown computing device 60 is only an example and should not impose any limitation on the functions and usage scope of the embodiments of the present application.

[0068] As Figure 6 shown, the components of the computing device 60 may include, but are not limited to: one or more processors or processing units 601, a system memory 602, and a bus 603 connecting different system components (including the system memory 602 and the processing unit 601).

[0069] The computing device 60 typically includes a variety of computer system-readable media. These media can be any available media accessible by the computing device 60, including volatile and non-volatile media, removable and non-removable media.

[0070] System memory 602 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 6021 and / or cache memory 6022. Computing device 60 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, ROM 6023 may be used to read and write to non-removable, non-volatile magnetic media ( Figure 6 not shown, and commonly referred to as a "hard disk drive"). Although not shown in Figure 6 , a disk drive for reading and writing to removable non-volatile disks (such as a "floppy disk"), and an optical disk drive for reading and writing to removable non-volatile optical disks (such as a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 603, which connects different system components, via one or more data media interfaces. System memory 602 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the embodiments of the present application.

[0071] A program / utilities 6025 having a set (at least one) of program modules 6024 may be stored, for example, in system memory 602, and such program modules 6024 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data, and an implementation of a network environment may be included in each or some combination of these examples. Program modules 6024 generally execute the functions and / or methods in the embodiments described in the present application.

[0072] Computing device 60 may also communicate with one or more external devices 604 (such as a keyboard, pointing device, display, etc.). Such communication may be through an input / output (I / O) interface 605. Also, computing device 60 may communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 606. As Figure 6 shown, network adapter 606 communicates with other modules (such as processing unit 601, etc.) of computing device 60 via bus 603, which connects different system components. It should be understood that although Figure 6 not shown, other hardware and / or software modules may be used in conjunction with computing device 60.

[0073] The processing unit 601 executes various functional applications and data processing by running the programs stored in the system memory 602. For example, it constructs a multi-dimensional analysis model, obtains four main control influencing factors for quality evaluation based on the multi-dimensional analysis model, obtains the weights of the influencing factors based on the analytic hierarchy process, obtains the normalized thematic maps of the evaluation indexes of the influencing factors based on the Kriging interpolation method, overlays the normalized thematic maps based on the GIS overlay coupling function to obtain a quality quantitative index type zoning evaluation map for the entire area of the composite foundation, and divides and grades the quality quantitative index type zoning evaluation map to conduct a zonal evaluation of the quality of the vibroflotation gravel pile composite foundation in the entire area. The specific implementation manners of each step will not be repeated here. It should be noted that although several units / modules or sub-units / sub-modules of the vibroflotation gravel pile composite foundation quality evaluation device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units / modules described above can be embodied in one unit / modules. Conversely, the features and functions of one unit / modules described above can be further divided and embodied by multiple units / modules.

[0074] In the description of the present application, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0075] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0076] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there can be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms.

[0077] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] In addition, in each embodiment of the present application, each functional unit may be integrated into one processing unit, may exist physically alone for each unit, or two or more units may be integrated into one unit.

[0079] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0080] Finally, it should be noted that the above embodiments are only specific implementation manners of the present application, used to illustrate the technical solutions of the present application, rather than limiting them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0081] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

Claims

1. A method for evaluating the quality of vibro-stone pile composite foundation based on analytic hierarchy process, characterized in that: The method comprises the following steps: S10, construct a multi-dimensional analysis model; S20, obtaining four main influencing factors of quality evaluation based on the multi-dimensional analysis model; S30, obtaining the weight of each of the influencing factors based on the hierarchical analysis method; S40, obtaining normalized thematic maps of evaluation indicators of each of the impact factors based on the Kriging interpolation method; S50, superimposing the normalized thematic maps based on the GIS superposition coupling function to obtain a quality quantitative index-type zoning evaluation map of the entire composite foundation area; S60, dividing and grading the quality quantitative index type zoning evaluation diagram, thereby performing zoning evaluation on the quality of the vibro-compacted stone pile composite foundation in the entire area.

2. The method for evaluating the quality of vibro-stone pile composite foundation according to claim 1, characterized in that: Step S10 includes the following steps: S110, conduct static load test on composite foundation; S120, evaluate the integrity and density of vibro-stone columns; S130, constructing a multi-dimensional analysis model based on the test and evaluation results.

3. The quality evaluation method of vibro-stone pile composite foundation according to claim 1 is characterized in that: Step S30 includes: S310, based on the Delphi method, technical experts scored the impact factor using a 1-9 scale; S320, constructing an indicator weight vector based on the scoring results and the lowest-level quality evaluation impact factor indicators; S330, obtaining the weight of each of the influencing factors based on the hierarchical analysis method.

4. The method for evaluating the quality of vibro-stone pile composite foundation according to claim 1, characterized in that: Step S40 includes: S410, dimensionless and normalized data processing of impact factor indicators; S420, multiplying the impact factor index after dimensionless and normalized data processing by the determined combined weights of each impact factor; S430, based on the Kriging interpolation method, uses the numerical analysis capability of GIS to obtain the normalized thematic maps of the evaluation indicators of each influencing factor.

5. The method for evaluating the quality of vibro-stone pile composite foundation according to claim 1, characterized in that: Step S50 includes: S510, based on the GIS information fusion overlay coupling function, overlaying the normalized thematic maps; S520, obtaining a quality quantitative index-type zoning evaluation map of the entire composite foundation area.

6. The method for evaluating the quality of vibro-stone pile composite foundation according to claim 1, characterized in that: Step S60 includes: S610, grading the index value based on a dynamic natural grading method, and grading it into five levels according to different thresholds; S620, based on the classification results, the quality evaluation map of the entire area is divided into a foundation treatment quality high-quality area, a relatively high-quality area, a transition area, a general area and a warning area.

7. A method for evaluating the quality of vibro-stone pile composite foundation according to claim 3, characterized in that: Step S330 includes: S331, establishing a hierarchical analysis diagram of factors affecting the quality of vibro-stone pile composite foundation based on the analytic hierarchy process to obtain the weight of each of the influencing factors; S332, construct a judgment matrix and perform a consistency test.

8. A method for evaluating the quality of vibro-stone pile composite foundation according to claim 7, characterized in that: Step S332 includes: S3321, construct judgment matrix; S3322, verifying the consistency of the hierarchical total ordering matrix formed by the judgment matrix.

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