Method for determining scope of protection area for rail transit structure under karst environment

Abstract

The present invention discloses a method, device, computing equipment and computer storage medium for determining the scope of the control protection area of a rail transit structure in a karst environment. According to the technical solution provided by the present invention, basic address data and structural parameters of existing structures are obtained, and the positions of the existing structures in the geological section and the corresponding overburden types are determined; based on this, a position relationship model of the corresponding existing structure and the relative space of external operations is established; according to the structural types, structural parameters of the existing structures and the corresponding overburden types, based on the position relationship model, a calculation method for range parameters under critical conditions is determined, and the control protection area range under the corresponding critical conditions is obtained. By comprehensively analyzing the influence range of external operations, the influence range of karst collapse and the influence range of existing structures, the control protection area range under the critical conditions that affect the existing structures is accurately determined, the corresponding potential threats are scientifically analyzed, and the safety of urban rail structures is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of structural safety of transportation facilities, and particularly to a method for determining the scope of a control protection area for a rail transit structure in a karst environment, a device, a computing device, and a computer storage medium. Background Art

[0002] With the acceleration of the urbanization process and the continuous growth of the population, urban rail transit, as an important means to relieve urban traffic congestion and improve travel efficiency, has been widely applied and developed. However, in areas with complex karst geological conditions, the operation of rail transit faces many problems. The existence of karst phenomena also poses a potential threat to the safety and stability of rail transit facilities. Once karst geological disasters occur, such as stratum collapse and tunnel deformation, it will directly threaten the safety of train operation and even trigger major accidents. Therefore, it is very necessary to strengthen the construction management around the urban rail structure in karst areas.

[0003] The control protection area, also known as the security protection area, refers to the control and protection area set within a specific range of its structure and surrounding areas to protect the normal use and safety of the urban rail transit structure, and it is the first red line for rail transit operation management. At present, the requirements for the scope of the control protection area in the industry standard CJJ-J / T 202-2013 "Technical Specification for the Safety Protection of Urban Rail Transit Structures" in China are as follows: "Within 50 meters outside the outer edge line of the underground station and tunnel structure; within 30 meters outside the outer edge line of the ground, elevated station and section structure; within 10 meters outside the outer edge line of buildings and structures such as entrances, ventilation kiosks, and substations is the control protection area. When the urban rail transit control area encounters special engineering geology or special external operations, the scope of the urban rail transit control protection area should be appropriately expanded, such as areas with developed karst soil caves, highly permeable sand layers, and under-consolidated regions, etc."

[0004] It can be seen from this that when special engineering geological conditions exist in the environment, the control protection area should be appropriately expanded, but it does not explain how to expand specifically, to what extent, and the expanded scope cannot be quantified. And the current relevant technical content mainly focuses on the safety guarantee during the vehicle operation process of rail transit or traffic planning, and there is no content regarding the impact of karst geology on the safety of transportation facilities, let alone relevant content about the geological impact on the surrounding existing transportation facilities during external operations on this basis. No coping methods are proposed for this situation, and the safety of existing transportation facilities cannot be guaranteed when facing external operations in a special geological environment. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a method for determining the scope of the controlled protection area of a rail transit structure in a karst environment, and a corresponding device, a computing device, and a computer storage medium for determining the scope of the controlled protection area of a rail transit structure in a karst environment.

[0006] According to one aspect of the present invention, there is provided a method for determining the scope of the controlled protection area of a rail transit structure in a karst environment, the method comprising:

[0007] Obtain basic address information and structural parameters of existing structures, and determine the position of the existing structures in the geological section and the corresponding overburden layer types;

[0008] According to the overburden layer types corresponding to the positions of the existing structures, establish a corresponding position relationship model between the existing structures and the relative space of external operations;

[0009] According to the structural types, structural parameters of the existing structures, and the corresponding overburden layer types, based on the position relationship model, determine the calculation method of the range parameters under critical conditions, and obtain the controlled protection area range under the corresponding critical conditions.

[0010] In the above solution, the obtaining of the basic address information and the structural parameters of the existing structures, and determining the position of the existing structures in the geological section and the corresponding overburden layer types further includes:

[0011] Based on the position of the existing structures in the geological section and the basic address information, determine the formation types where the existing structures are located; wherein, the formation types at least include karst layers and overburden layers;

[0012] If the existing structures are in the karst layer, end the method for determining the scope of the controlled protection area of the rail transit structure in the karst environment;

[0013] If the existing structures are in the overburden layer, further determine the corresponding overburden layer types; wherein, the overburden layer types at least include sandy soil layers and clay layers.

[0014] In the above solution, the establishing of the corresponding position relationship model between the existing structures and the relative space of external operations according to the overburden layer types corresponding to the positions of the existing structures further includes:

[0015] The position relationship model between the existing structures and the relative space of external operations includes a sandglass model and a soil cave model;

[0016] When the overburden layer type is a sandy soil layer, it corresponds to the sandglass model;

[0017] When the overburden layer type is a clay layer, it corresponds to the soil cave model.

[0018] In the above solution, the structural types of the existing structure include: interval tunnel and underground station; among them, the underground station further includes: cut-and-cover method station and mining method station.

[0019] In the above solution, based on the structural type, structural parameters of the existing structure and the corresponding overburden layer type, and based on the position relationship model, determine the calculation method of the range parameter under critical conditions, and obtain the control protection area range under the corresponding critical conditions, which further includes:

[0020] When the structural type of the existing structure is an interval tunnel, if the overburden layer is sandy soil, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, determine the critical conditions for external operations to affect the existing structure, and accordingly determine the calculation method of the range parameter; among them,

[0021] According to the basic address information and the structural parameters of the existing structure, obtain the diameter D of the interval tunnel, the excavation depth H of the external operation foundation pit, and the distance H from the tunnel center to the soil-rock interface 2 ;

[0022] According to the diameter D of the interval tunnel, determine the approaching range L of the existing structure

[0023] L = 3D;

[0024] According to the distance H from the tunnel center to the soil-rock interface 2 , determine the limit range M of karst ground collapse affecting the tunnel

[0025]

[0026] Among them, θ is the collapse angle determined according to the hourglass model;

[0027] According to the hourglass model, establish the geometric relationship between the range parameters under critical conditions, and obtain the control protection area range a under critical conditions

[0028]

[0029] Among them, N is the external operation influence range, and N = 1.0H;

[0030] If the overburden layer is clay, the soil cave model is used for calculation; based on the geometric relationship in the soil cave model, determine the critical conditions for external operations to affect the existing structure, and accordingly determine the calculation method of the range parameter; among them,

[0031] According to the basic address information and the structural parameters of the existing structure, obtain the span B of the soil cave;

[0032] According to the diameter D of the interval tunnel, determine the approaching range L of the existing structure

[0033] L = 3D;

[0034] Determine the ultimate range M of karst ground collapse affecting the tunnel according to the span B of the soil cave.

[0035] M = 1.0B;

[0036] Based on the soil cave model, establish the geometric relationship between the range parameters under critical conditions to obtain the control protection range a under critical conditions.

[0037] a = L + M + N = 3D + B + H.

[0038] In the above solution, the method of determining the calculation method of the range parameters under critical conditions and obtaining the corresponding control protection range under critical conditions according to the structure type, structure parameters of the existing structure and the corresponding overburden layer type based on the position relationship model further includes:

[0039] When the structure type of the existing structure is an open-cut or top-down station, if the overburden layer is a sandy soil layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, determine the critical conditions for external operations affecting the existing structure, and accordingly determine the calculation method of the range parameters; among them,

[0040] Obtain the excavation depth h of the open-cut station foundation pit and the overburden layer thickness H according to the basic address data and the structure parameters of the existing structure. 1 ;

[0041] Determine the approaching range L of the existing structure according to the excavation depth h of the open-cut station foundation pit.

[0042] L = 2h;

[0043] According to the overburden layer thickness H 1 , determine the ultimate range M of karst ground collapse affecting the tunnel.

[0044]

[0045] Among them, θ is the collapse angle determined according to the hourglass model.

[0046] Based on the hourglass model, establish the geometric relationship between the range parameters under critical conditions to obtain the control protection range a under critical conditions.

[0047]

[0048] If the overburden layer is a clay layer, the soil cave model is used for calculation; based on the geometric relationship in the soil cave model, determine the critical conditions for external operations affecting the existing structure, and accordingly determine the calculation method of the range parameters; among them,

[0049] Obtain the span B of the soil cave according to the basic address data and the structure parameters of the existing structure.

[0050] Determine the proximity range L of the existing structure according to the excavation depth h of the open-cut station foundation pit

[0051] L = 2h;

[0052] Determine the ultimate range M of the karst ground collapse affecting the tunnel according to the span B of the soil cave

[0053] M = 1.0B;

[0054] Establish the geometric relationship between the range parameters under critical conditions according to the soil cave model, and obtain the control protection range a under critical conditions

[0055] a = L + M + N = 2h + B + H.

[0056] In the above scheme, the method of determining the calculation method of the range parameters under critical conditions based on the position relationship model according to the structure type, structure parameters of the existing structure and the corresponding overburden type, and obtaining the control protection range under the corresponding critical conditions further includes:

[0057] When the structure type of the existing structure is a mined station, if the overburden is sandy soil, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, determine the critical conditions for the external operation to affect the existing structure, and determine the calculation method of the range parameters accordingly; among them,

[0058] Obtain the tunnel rough hole span W and the overburden thickness H according to the basic address data and the structure parameters of the existing structure 1 ;

[0059] Determine the proximity range L of the existing structure according to the tunnel rough hole span W

[0060] L = 2.5W;

[0061] According to the overburden thickness H 1 , determine the ultimate range M of the karst ground collapse affecting the tunnel

[0062]

[0063] Among them, θ is the collapse angle determined according to the hourglass model;

[0064] Establish the geometric relationship between the range parameters under critical conditions according to the hourglass model, and obtain the control protection range a under critical conditions

[0065]

[0066] If the overlying layer is a clay layer, a soil cave model is used for calculation; based on the geometric relationships in the soil cave model, the critical conditions for the external operation to affect the existing structure are determined, and the calculation method of the range parameters is determined accordingly; among them,

[0067] According to the foundation address data and the structural parameters of the existing structure, the span B of the soil cave is obtained;

[0068] According to the span W of the tunnel's roughcast hole, the approaching range L of the existing structure is determined

[0069] L = 2.5W;

[0070] According to the span B of the soil cave, the ultimate range M of the karst ground collapse affecting the tunnel is determined

[0071] M = 1.0B;

[0072] According to the soil cave model, the geometric relationships between the range parameters under the critical conditions are established, and the control protection area range a under the critical conditions is obtained

[0073] a = L + M + N = 2.5W + B + H.

[0074] According to another aspect of the present invention, there is provided an apparatus for determining the control protection area range of a rail transit structure in a karst environment, including: a parameter acquisition and type determination module, a model establishment module, and a range determination module; among them,

[0075] The parameter acquisition and type determination module is used to acquire the foundation address data and the structural parameters of the existing structure, and determine the position of the existing structure in the geological section and the corresponding overlying layer type;

[0076] The model establishment module is used to establish a corresponding position relationship model between the existing structure and the relative space of the external operation according to the overlying layer type corresponding to the position of the existing structure;

[0077] The range determination module is used to determine the calculation method of the range parameters under the critical conditions based on the position relationship model according to the structural type, structural parameters of the existing structure, and the corresponding overlying layer type, and obtain the control protection area range under the corresponding critical conditions.

[0078] According to still another aspect of the present invention, there is provided a computing device, including: a processor, a memory, a communication interface, and a communication bus, and the processor, the memory, and the communication interface complete mutual communication through the communication bus;

[0079] The memory is used to store at least one executable instruction, and the executable instruction causes the processor to perform the operations corresponding to the method for determining the control protection area range of the rail transit structure in the karst environment as described above.

[0080] According to another aspect of the present invention, a computer storage medium is provided, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute operations corresponding to the method for determining the scope of a rail transit structure control protection zone in a karst environment as described above.

[0081] According to the technical solution provided by the present invention, basic address data and structural parameters of the existing structure are obtained to determine the position of the existing structure in the geological section and the corresponding covering layer type; according to the covering layer type corresponding to the position of the existing structure, a corresponding position relationship model of the existing structure and the external operation relative space is established; according to the structural type, structural parameters and corresponding covering layer type of the existing structure, based on the position relationship model, a calculation method of the range parameters under critical conditions is determined, and the range of the control protection zone under the corresponding critical conditions is obtained. By acquiring basic geological data and relevant parameters of existing structures, the position of the tunnel or station as an existing structure in the geological section is determined. Combined with the stratification of the geological section, the geological conditions near the existing structure are accurately determined. Based on the type of covering layer, a position relationship model between the existing structure and the external operation in relative space is established in a targeted manner, so as to clearly reflect the position relationship and geometric relationship between the two. On the basis of this model, based on the different structural types and different stratum types of the existing structure, the critical conditions that will affect the existing structure in various cases are determined. According to the critical conditions at this time, the calculation method of the relevant parameters of the safety protection zone is scientifically determined, and then the corresponding control protection zone range under different circumstances is obtained accurately and reasonably. In this way, all possible combinations of existing structures and stratum types that may appear at present are analyzed, and the corresponding control protection zone range under various circumstances is scientifically and comprehensively obtained, which improves the accuracy and adaptability of setting the control protection zone range in the face of external construction operations. While further improving the safety of the transportation infrastructure structure, the rights and interests of the external construction workers are taken into account, and the drawbacks of insufficient or excessive design of the control protection zone range are avoided, which greatly improves the rationality of the processing process and provides effective guidance to the staff related to the transportation infrastructure.

[0082] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0083] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the accompanying drawings:

[0085] Figure 1 shows a schematic flow chart of a method for determining the scope of the control protection area of a rail transit structure in a karst environment according to an embodiment of the present invention;

[0086] Figure 2 shows a schematic diagram of an hourglass model according to an embodiment of the present invention;

[0087] Figure 3 shows a schematic diagram of a soil cave model according to an embodiment of the present invention;

[0088] Figure 4 shows a schematic flow chart of a method for determining the type of overburden layer according to an embodiment of the present invention;

[0089] Figure 5 shows a schematic flow chart of a method for calculating range parameters and determining the scope of the control protection area under critical conditions according to an embodiment of the present invention;

[0090] Figure 6 shows a schematic diagram of the scope of the control protection area of a tunnel based on the hourglass model according to an embodiment of the present invention;

[0091] Figure 7 shows a schematic diagram of the scope of the control protection area of a tunnel based on the soil cave model according to an embodiment of the present invention;

[0092] Figure 8 shows a schematic diagram of the scope of the control protection area of a cut-and-cover or top-down station based on the hourglass model according to an embodiment of the present invention;

[0093] Figure 9 shows a schematic diagram of the scope of the control protection area of a cut-and-cover or top-down station based on the soil cave model according to an embodiment of the present invention;

[0094] Figure 10 shows a schematic diagram of the scope of the control protection area of a mining method station based on the hourglass model according to an embodiment of the present invention;

[0095] Figure 11 shows a schematic diagram of the scope of the control protection area of a mining method station based on the soil cave model according to an embodiment of the present invention;

[0096] Figure 12 shows a schematic flow chart of a method for determining the scope of the control protection area of a rail transit structure in a karst environment according to another embodiment of the present invention;

[0097] Figure 13Shows a structural block diagram of a device for determining the scope of the control protection area of a rail transit structure in a karst environment according to an embodiment of the present invention;

[0098] Figure 14 Shows a schematic structural diagram of a computing device according to an embodiment of the present invention. Detailed implementation manners

[0099] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0100] Figure 1 Shows a schematic flow diagram of a method for determining the scope of the control protection area of a rail transit structure in a karst environment according to an embodiment of the present invention. The method includes the following steps:

[0101] Step S101: Obtain the basic address information and the structural parameters of the existing structure, and determine the position of the existing structure in the geological section and the corresponding overburden layer type.

[0102] Preferably, this method only targets the existing underground main structure, which only includes the interval tunnel and the underground station. The ancillary structure, elevated structure, etc. are not within the scope of discussion of this method.

[0103] The structural types of the existing underground main structure include: interval tunnel, and, underground station; among them, the underground station further includes: cut-and-cover method station, and, mining method station;

[0104] The overburden layer type at least includes sandy soil layer and clay layer.

[0105] Step S102: Establish a corresponding physical model of karst ground collapse according to the overburden layer type corresponding to the location of the existing structure.

[0106] Preferably, the physical model of karst ground collapse includes a sand hourglass model and a soil cave model;

[0107] When the overburden layer type is a sandy soil layer, it corresponds to the sand hourglass model;

[0108] When the overburden layer type is a clay layer, it corresponds to the soil cave model.

[0109] The sand hourglass model is as Figure 2 shown, Figure 2 Shows a schematic diagram of a sand hourglass model according to an embodiment of the present invention. Among them, the collapse pit formed by the influence range of the hourglass-shaped karst ground collapse can be clearly represented by two diagonal lines symmetrically extending upward from the center of the karst cave. The included angle between the diagonal line and the horizontal line is the collapse angle, and the value of the collapse angle is the magnitude of the internal friction angle of the sandy soil layer.

[0110] The soil cave model is as follows Figure 3 as shown Figure 3 Figure Figure 3 shows a schematic diagram of a soil cave model according to an embodiment of the present invention. Among them, the influence range of soil cave - type karst ground collapse can be clearly represented by the vertical perpendicular line extending upward from the outer contour of the soil cave.

[0111] Step S103: According to the structural type, structural parameters of the existing structure and the corresponding overburden type, establish the relative position relationship between the existing structure, karst ground collapse and external operations, determine the calculation method of the range parameters under critical conditions, and obtain the control protection area range under the corresponding critical conditions.

[0112] Preferably, the external operation is selected as the foundation pit project with the largest influence range for analysis. Taking this type of project with the greatest adverse impact on the karst area as the basis for model establishment, that is, based on this type, the maximum value of the possible influence range is obtained, so that the finally determined control protection area range can include the control protection area ranges corresponding to other various external operation project types.

[0113] Specifically, the range parameters include the external operation influence range, the ultimate range of karst ground collapse affecting the tunnel, and the approach range of the existing structure. The influencing factor of external operation corresponds to the external operation influence range, the influencing factor of karst collapse corresponds to the ultimate range of karst ground collapse affecting the tunnel, and the influencing factor of the existing structure corresponds to the approach range of the existing structure. Moreover, due to the influence of external operations, karst ground collapse may occur between the external operation area and the existing structure, and the collapse range further affects the safety of the existing structure. Therefore, the control protection area range is formed by the superposition of these three range parameters: the external operation influence range, the ultimate range of karst ground collapse affecting the tunnel, and the approach range of the existing structure.

[0114] Preferably, referring to the external operation influence zoning and proximity degree in CJJ / T 202 - 2013 "Technical Specification for Structural Safety Protection of Urban Rail Transit", the boundary position between the significant influence area and the general influence area is taken as the critical position where the external operation affects the karst layer, and the boundary position between the relatively close and not - close of the existing structure is taken as the critical position where the existing structure is affected by karst, and the critical conditions are determined accordingly.

[0115] A method for determining the scope of the control protection area of a rail transit structure in a karst environment provided by this embodiment obtains basic address information and structural parameters of existing structures, determines the position of the existing structures in the geological section and the corresponding overburden layer types; based on the overburden layer types corresponding to the positions of the existing structures, establishes a relative spatial position relationship model between the existing structures and external operations; based on the structural types, structural parameters of the existing structures and the corresponding overburden layer types, determines the calculation method of the range parameters under critical conditions based on the position relationship model, and obtains the control protection area range under the corresponding critical conditions. Through the method for determining the scope of the control protection area of a rail transit structure in a karst environment provided by this embodiment, by obtaining the basic geological information and relevant parameters of the existing structures, determines the position of the tunnel or station as the existing structure in the geological section, and combines the stratification of the geological section to accurately determine the geological conditions near the existing structures. Thus, based on the overburden layer types, a relative spatial position relationship model between the existing structures and external operations is established in a targeted manner, clearly reflecting the position relationship and geometric relationship between the two. On the basis of this model, based on the different structural types and different strata types of the existing structures, determines the critical conditions that will affect the existing structures in various situations, scientifically determines the calculation method of the relevant parameters of the safety protection area range according to the critical conditions at this time, and obtains the control protection area range. In this way, the structural safety of traffic infrastructure is improved, and effective guidance is provided for the staff related to traffic infrastructure.

[0116] Figure 4 The flowchart shows a method for determining the overburden layer type according to an embodiment of the present invention, as Figure 4 shown, the method includes the following steps:

[0117] Step S401, based on the position of the existing structure in the geological section and the basic address information, determine the stratum type where the existing structure is located.

[0118] Preferably, the stratum types include at least a karst layer and an overburden layer.

[0119] Step S402, determine whether the stratum type where the existing structure is located is a karst layer.

[0120] Specifically, if so, execute step S403; if not, execute step S404.

[0121] Step S403, end the method for determining the scope of the control protection area of the rail transit structure in the karst environment.

[0122] When the existing structure is located in soluble rock, that is, in the karst layer, since the soluble rock is relatively stable, it does not belong to several situations targeted by the present invention and is not suitable for further analysis using the method described in the present invention.

[0123] However, the present invention is applicable to the area with soil on the upper layer and rock on the lower layer, that is, the overburden layer type is sandy soil layer or clay layer, and the lower part is a karst layer of soluble rock.

[0124] Step S404: Determine the corresponding overburden layer type.

[0125] Preferably, the overburden layer type includes at least sandy soil layer and clay layer.

[0126] According to the above method, by based on the position of the existing structure in the geological section and the basic geological data, the formation type where the existing structure is located is accurately determined, which effectively helps to select an appropriate model when calculating the control protection area range subsequently, and eliminates the situations where this method is not suitable, avoiding the situation of incorrect application.

[0127] Figure 5 Fig. shows a schematic flow chart of the method for calculating range parameters under critical conditions and determining the control protection area range according to an embodiment of the present invention;

[0128] As Figure 5 shown, the method includes the following steps:

[0129] Step S501: Determine the structure type, structure parameters of the existing structure and the corresponding overburden layer type, and determine the position relationship model.

[0130] Step S502: Determine the calculation method of range parameters under critical conditions.

[0131] Step S503: Calculate the control protection area range under critical conditions according to the range parameters.

[0132] Specifically, when the structure type of the existing structure is an interval tunnel, if the overburden layer is a sandy soil layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the calculation method of the range parameters is determined accordingly; as Figure 6 shown, Figure 6 Fig. shows a schematic diagram of the control protection area range of the tunnel based on the hourglass model according to an embodiment of the present invention; wherein,

[0133] According to the basic geological data and the structure parameters of the existing structure, the diameter D of the interval tunnel, the excavation depth H of the external operation foundation pit and the distance H from the tunnel center to the soil-rock interface are obtained 2 ;

[0134] According to the diameter D of the interval tunnel, the approaching range L of the existing structure is determined

[0135] L = 3D;

[0136] According to the distance H from the tunnel center to the soil-rock interface2 , determine the ultimate range M of the karst ground collapse affecting the tunnel

[0137]

[0138] where θ is the collapse angle determined according to the hourglass model;

[0139] According to the hourglass model, establish the geometric relationship between the range parameters under critical conditions, and obtain the control protection area range a under critical conditions

[0140]

[0141] where N is the external operation influence range, and N = 1.0H.

[0142] Preferably, for the diameter D of the interval tunnel, if the shield method and / or pipe jacking method are used in the tunnel excavation process, the equivalent diameter corresponding to the diameter D of the interval tunnel is the original diameter of the tunnel;

[0143] If the mining method is used in the tunnel excavation process, the equivalent diameter corresponding to the diameter D of the interval tunnel is the equivalent circle diameter of its area

[0144]

[0145] where S is the equivalent circle area.

[0146] Preferably, the relationship between the external operation influence range N and the external operation foundation pit excavation depth H is also determined based on CJJ / T 202-2013 "Technical Code for Structural Safety Protection of Urban Rail Transit",

[0147] i.e., N = 1.0H.

[0148] Specifically, if the overburden layer is a clay layer, the soil cave model is used for calculation; based on the geometric relationship in the soil cave model, determine the critical conditions for the external operation to affect the existing structure, and accordingly determine the calculation method of the range parameters; as Figure 7 shown Figure 7 shows a schematic diagram of the tunnel control protection area based on the soil cave model according to an embodiment of the present invention; where

[0149] According to the basic address data and the structural parameters of the existing structure, obtain the soil cave span B;

[0150] According to the diameter D of the interval tunnel, determine the approach range L of the existing structure

[0151] L = 3D;

[0152] According to the soil cave span B, determine the ultimate range M of the karst ground collapse affecting the tunnel

[0153] M = 1.0B;

[0154] According to the soil cave model, establish the geometric relationship between the range parameters under critical conditions, and obtain the control protection area range a under critical conditions

[0155] a = L + M + N = 3D + B + H.

[0156] Preferably, for the diameter D of the interval tunnel, if the shield method and / or pipe jacking method is adopted during the tunnel excavation process, the equivalent diameter corresponding to the diameter D of the interval tunnel is the original diameter of the tunnel;

[0157] If the mining method is adopted during the tunnel excavation process, the equivalent diameter corresponding to the diameter D of the interval tunnel is the equivalent circular diameter of its area

[0158]

[0159] where S is the equivalent circular area.

[0160] Specifically, when the structural type of the existing structure is an open-cut or top-down station, if the overburden layer is a sandy soil layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, determine the critical conditions for the external operation to affect the existing structure, and accordingly determine the calculation method of the range parameters; as Figure 8 shown, Figure 8 shows a schematic diagram of the control protection area of an open-cut or top-down station based on the hourglass model according to an embodiment of the present invention; where

[0161] According to the basic address data and the structural parameters of the existing structure, obtain the excavation depth h of the open-cut station foundation pit and the overburden layer thickness H 1 ;

[0162] According to the excavation depth h of the open-cut station foundation pit, determine the approaching range L of the existing structure

[0163] L = 2h;

[0164] According to the overburden layer thickness H 1 , determine the limit range M of karst ground collapse affecting the tunnel

[0165]

[0166] where θ is the collapse angle determined according to the hourglass model;

[0167] According to the hourglass model, establish the geometric relationship between the range parameters under critical conditions, and obtain the control protection area range a under critical conditions

[0168]

[0169] Specifically, if the overlying layer is a clay layer, a soil cavity model is used for calculation; based on the geometric relationships in the soil cavity model, the critical conditions for the influence of external operations on the existing structure are determined, and the calculation method for the range parameters is determined accordingly; as Figure 9 shown Figure 9 Figure 4 shows a schematic diagram of the control protection area of an open-cut or top-down station based on the soil cavity model according to an embodiment of the present invention; wherein,

[0170] Based on the basic address information and the structural parameters of the existing structure, the span B of the soil cavity is obtained;

[0171] According to the excavation depth h of the open-cut station foundation pit, the approaching range L of the existing structure is determined

[0172] L = 2h;

[0173] According to the span B of the soil cavity, the limit range M of the karst ground collapse affecting the tunnel is determined

[0174] M = 1.0B;

[0175] Based on the soil cavity model, the geometric relationships between the range parameters under critical conditions are established, and the control protection area range a under critical conditions is obtained

[0176] a = L + M + N = 2h + B + H.

[0177] Specifically, when the structural type of the existing structure is a mined-method station, if the overlying layer is a sandy soil layer, an hourglass model is used for calculation; based on the geometric relationships in the hourglass model, the critical conditions for the influence of external operations on the existing structure are determined, and the calculation method for the range parameters is determined accordingly; as Figure 10 shown Figure 10 Figure 5 shows a schematic diagram of the control protection area of a mined-method station based on the hourglass model according to an embodiment of the present invention; wherein,

[0178] Based on the basic address information and the structural parameters of the existing structure, the gross tunnel span W of the tunnel and the overlying layer thickness H are obtained 1 ;

[0179] According to the gross tunnel span W of the tunnel, the approaching range L of the existing structure is determined

[0180] L = 2.5W;

[0181] According to the overlying layer thickness H 1 , the limit range M of the karst ground collapse affecting the tunnel is determined

[0182]

[0183] wherein, θ is the collapse angle determined according to the hourglass model;

[0184] According to the hourglass model, the geometric relationship between range parameters under critical conditions is established, and the control protection area range a under critical conditions is obtained.

[0185]

[0186] If the overburden layer is a clay layer, the soil cave model is used for calculation; based on the geometric relationship in the soil cave model, the critical conditions for the external operation to affect the existing structure are determined, and the calculation method of the range parameters is determined accordingly; as Figure 11 shown, Figure 11 Fig. shows a schematic diagram of the control protection area range of a mining method station based on the soil cave model according to an embodiment of the present invention; wherein,

[0187] According to the basic address data and the structural parameters of the existing structure, the soil cave span B is obtained;

[0188] According to the gross tunnel span W of the tunnel, the approaching range L of the existing structure is determined

[0189] L = 2.5W;

[0190] According to the soil cave span B, the limit range M of the karst ground collapse affecting the tunnel is determined

[0191] M = 1.0B;

[0192] According to the soil cave model, the geometric relationship between range parameters under critical conditions is established, and the control protection area range a under critical conditions is obtained

[0193] a = L + M + N = 2.5W + B + H.

[0194] Thus, six cases combined from three different existing structure types and two overburden layer types are analyzed, and the corresponding control protection area ranges in each case are obtained.

[0195] Accordingly, a specific method for determining the safety protection area range can also be obtained, as Figure 12 shown, Figure 12 Fig. shows a schematic flow chart of a method for determining the control protection area range of a rail transit structure in a karst environment according to another embodiment of the present invention.

[0196] Among them, it is first determined whether the existing structure is located in the overburden layer. If it is located in soluble rock, it ends directly. After being located in the overburden layer, the type of ground collapse is determined, and the position relationship model is further determined based on the collapse type. Subsequently, according to the type of the existing structure, the three-parameter range to be superimposed is determined. Finally, according to the type of the existing structure, the formulas for calculating the final corresponding control protection area range are determined respectively according to the hourglass model and the soil cave model.

[0197] According to the above method, based on the position relationship model between the existing structure and the relative space of the external operation, as well as different structural types and different stratum types of the existing structure, a variety of different situations that may occur are distinguished, and the critical situations that will affect the existing structure in each case are determined respectively. And according to the critical conditions at this time, the calculation methods of the relevant parameters of the corresponding safety protection area range are scientifically determined. In this way, various combinations of the existing structure and stratum types that may occur currently are analyzed, and the corresponding control protection area ranges in various cases are scientifically and comprehensively obtained, improving the accuracy and adaptability of setting the control protection area range in the face of external construction operations, and also greatly improving the safety of traffic facility operation. It gives effective guidance to the staff related to traffic infrastructure when facing complex display situations.

[0198] Figure 13 The structural block diagram of a device for determining the control protection area range of a rail transit structure in a karst environment according to an embodiment of the present invention is shown, as Figure 13 shown, the system includes: a parameter acquisition and type determination module 1301, a model establishment module 1302, and a range determination module 1303; wherein,

[0199] The parameter acquisition and type determination module 1301 is used to obtain basic address materials and the structural parameters of the existing structure, and determine the position of the existing structure in the geological section and the corresponding overburden layer type.

[0200] Specifically, the structural types of the existing structure include: an interval tunnel, and an underground station; wherein, the underground station further includes: an open-cut and cover-and-cut method station, and a mining method station.

[0201] Specifically, the parameter acquisition and type determination module 1301 is further used for,

[0202] Based on the position of the existing structure in the geological section and the basic address materials, determine the stratum type where the existing structure is located; wherein, the stratum type at least includes a karst layer and an overburden layer;

[0203] If the existing structure is in the karst layer, then end the method for determining the control protection area range of the rail transit structure in the karst environment;

[0204] If the existing structure is in the overburden layer, further determine the corresponding overburden layer type; wherein, the overburden layer type at least includes a sandy soil layer and a clay soil layer.

[0205] The model establishment module 1302 is used to establish a corresponding position relationship model between the existing structure and the relative space of the external operation according to the overburden layer type corresponding to the location of the existing structure.

[0206] Specifically, the model establishment module 1302 is further configured to,

[0207] The positional relationship model between the existing structure and the external operation space includes an hourglass model and a soil cave model;

[0208] When the overburden layer type is sandy soil layer, it corresponds to the hourglass model;

[0209] When the overburden layer type is clay layer, it corresponds to the soil cave model.

[0210] The range determination module 1303 is configured to determine the calculation method of the range parameter under critical conditions and obtain the control protection area range under the corresponding critical conditions based on the positional relationship model according to the structure type, structure parameters of the existing structure, and the corresponding overburden layer type.

[0211] Specifically, the range determination module 1303 is further configured to,

[0212] When the structure type of the existing structure is an interval tunnel, if the overburden layer is a sandy soil layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the calculation method of the range parameter is determined accordingly; among them,

[0213] According to the basic address data and the structure parameters of the existing structure, the diameter D of the interval tunnel, the excavation depth H of the external operation foundation pit, and the distance H from the tunnel center to the soil-rock interface are obtained 2 ;

[0214] According to the diameter D of the interval tunnel, the approaching range L of the existing structure is determined

[0215] L = 3D;

[0216] According to the distance H from the tunnel center to the soil-rock interface 2 , the limit range M of karst ground collapse affecting the tunnel is determined

[0217]

[0218] where θ is the collapse angle determined according to the hourglass model;

[0219] According to the hourglass model, the geometric relationship between the range parameters under critical conditions is established, and the control protection area range a under critical conditions is obtained

[0220]

[0221] where N is the external operation influence range, and N = 1.0H;

[0222] If the covering layer is a clay layer, a soil cave model is used for calculation; based on the geometric relationships in the soil cave model, the critical conditions for the influence of external operations on the existing structure are determined, and the calculation method of the range parameters is determined accordingly; among them,

[0223] According to the foundation address data and the structural parameters of the existing structure, the span B of the soil cave is obtained;

[0224] According to the diameter D of the interval tunnel, the approaching range L of the existing structure is determined

[0225] L = 3D;

[0226] According to the span B of the soil cave, the limit range M of the karst ground collapse affecting the tunnel is determined

[0227] M = 1.0B;

[0228] According to the soil cave model, the geometric relationships between the range parameters under critical conditions are established, and the control protection area range a under critical conditions is obtained

[0229] a = L + M + N = 3D + B + H.

[0230] Specifically, the range determination module 1303 is further used for,

[0231] When the structural type of the existing structure is an open-cut or cover-and-cut station, if the covering layer is a sandy soil layer, an hourglass model is used for calculation; based on the geometric relationships in the hourglass model, the critical conditions for the influence of external operations on the existing structure are determined, and the calculation method of the range parameters is determined accordingly; among them,

[0232] According to the foundation address data and the structural parameters of the existing structure, the excavation depth h of the open-cut station foundation pit and the covering layer thickness H are obtained 1 ;

[0233] According to the excavation depth h of the open-cut station foundation pit, the approaching range L of the existing structure is determined

[0234] L = 2h;

[0235] According to the covering layer thickness H 1 , the limit range M of the karst ground collapse affecting the tunnel is determined

[0236]

[0237] Among them, θ is the collapse angle determined according to the hourglass model;

[0238] According to the hourglass model, the geometric relationships between the range parameters under critical conditions are established, and the control protection area range a under critical conditions is obtained

[0239]

[0240] If the covering layer is a clay layer, a soil cavity model is used for calculation; based on the geometric relationships in the soil cavity model, the critical conditions for the influence of external operations on the existing structure are determined, and the calculation method of the range parameters is determined accordingly; among them,

[0241] Based on the foundation address data and the structural parameters of the existing structure, the span B of the soil cavity is obtained;

[0242] Based on the excavation depth h of the open-cut station foundation pit, the approaching range L of the existing structure is determined

[0243] L = 2h;

[0244] Based on the span B of the soil cavity, the ultimate range M of the influence of karst ground collapse on the tunnel is determined

[0245] M = 1.0B;

[0246] Based on the soil cavity model, the geometric relationships between the range parameters under critical conditions are established, and the control protection area range a under critical conditions is obtained

[0247] a = L + M + N = 2h + B + H.

[0248] Specifically, the range determination module 1303 is further used for,

[0249] When the structural type of the existing structure is a mined tunnel station, if the covering layer is a sandy soil layer, an hourglass model is used for calculation; based on the geometric relationships in the hourglass model, the critical conditions for the influence of external operations on the existing structure are determined, and the calculation method of the range parameters is determined accordingly; among them,

[0250] Based on the foundation address data and the structural parameters of the existing structure, the gross span W of the tunnel and the covering layer thickness H are obtained 1 ;

[0251] Based on the gross span W of the tunnel, the approaching range L of the existing structure is determined

[0252] L = 2.5W;

[0253] Based on the covering layer thickness H 1 , the ultimate range M of the influence of karst ground collapse on the tunnel is determined

[0254]

[0255] Among them, θ is the collapse angle determined according to the hourglass model;

[0256] Based on the hourglass model, the geometric relationships between the range parameters under critical conditions are established, and the control protection area range a under critical conditions is obtained

[0257]

[0258] If the covering layer is a clay layer, a soil cave model is used for calculation; based on the geometric relationships in the soil cave model, the critical conditions for the external operation to affect the existing structure are determined, and the calculation method of the range parameters is determined accordingly; among them,

[0259] According to the foundation address data and the structural parameters of the existing structure, the span B of the soil cave is obtained;

[0260] According to the gross span W of the tunnel, the approaching range L of the existing structure is determined

[0261] L = 2.5W;

[0262] According to the span B of the soil cave, the ultimate range M of the karst ground collapse affecting the tunnel is determined

[0263] M = 1.0B;

[0264] According to the soil cave model, the geometric relationships between the range parameters under critical conditions are established, and the control protection area range a under critical conditions is obtained

[0265] a = L + M + N = 2.5W + B + H.

[0266] According to the present embodiment, a device for determining the scope of a control protection zone of a rail transit structure under a karst environment is provided, comprising: a parameter acquisition and type determination module, a model establishment module and a scope determination module; wherein the parameter acquisition and type determination module is used to acquire basic address information and structural parameters of an existing structure, and determine the position of the existing structure in a geological section and the corresponding covering layer type; the model establishment module is used to establish a corresponding position relationship model between the existing structure and the external operation relative space according to the covering layer type corresponding to the position of the existing structure; the scope determination module is used to determine the scope parameter calculation method under critical conditions based on the position relationship model according to the structural type, structural parameters and corresponding covering layer type of the existing structure, and derive the scope of the control protection zone under the corresponding critical conditions. Through the device for determining the range of the rail transit structure control protection zone in a karst environment provided by the present embodiment, the position of the tunnel or station as the existing structure in the geological section is determined by acquiring basic geological data and relevant parameters of the existing structure, and the geological conditions near the existing structure are accurately determined in combination with the stratification of the geological section. Therefore, a position relationship model of the relative space between the existing structure and the external operation is established in a targeted manner based on the covering layer type, so as to clearly reflect the positional relationship and geometric relationship between the two. On the basis of this model, based on the different structural types and different stratum types of the existing structure, the critical conditions that will affect the existing structure under various circumstances are determined, and according to the critical conditions at this time, the critical conditions are scientifically determined. The calculation method for determining the relevant parameters of the safety zone range can also accurately and reasonably obtain the corresponding control and protection zone range under different situations. In this way, various combinations of existing structures and stratum types that may appear at present are analyzed, and the corresponding control and protection zone ranges under various situations are scientifically and comprehensively obtained, which improves the accuracy and adaptability of setting the control and protection zone range when facing external construction work. While further improving the structural safety of transportation infrastructure, the rights and interests of external construction workers are taken into account, avoiding the disadvantages of insufficient or excessive design of the control and protection zone range, greatly improving the rationality of the processing process, and providing effective guidance to transportation infrastructure-related personnel.

[0267] The present invention also provides a non-volatile computer storage medium, which stores at least one executable instruction, and the executable instruction can execute operations corresponding to a method for determining the scope of a rail transit structure control protection zone in a karst environment in any of the above-mentioned method embodiments.

[0268] Figure 14 A schematic diagram of the structure of a computing device according to an embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the computing device.

[0269] like Figure 14As shown, the computing device may include: a processor 1402, a communications interface 1404, a memory 1406, and a communication bus 1408.

[0270] Wherein:

[0271] The processor 1402, the communications interface 1404, and the memory 1406 communicate with each other via the communication bus 1408.

[0272] The communications interface 1404 is used to communicate with network elements of other devices such as clients or other servers.

[0273] The processor 1402 is used to execute the program 1410, and specifically can execute the relevant steps in the above-mentioned embodiments of the method for determining the scope of the protection area of the rail transit structure in a karst environment.

[0274] Specifically, the program 1410 may include program code, and the program code includes computer operation instructions.

[0275] The processor 1402 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention. One or more processors included in the computing device may be of the same type of processor, such as one or more CPUs; or may be of different types of processors, such as one or more CPUs and one or more ASICs.

[0276] The memory 1406 is used to store the program 1410. The memory 1406 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk memory.

[0277] The program 1410 is specifically used to cause the processor 1402 to execute a method for determining the scope of the protection area of the rail transit structure in a karst environment in any of the above method embodiments. For the specific implementation of each step in the program 1410, reference may be made to the corresponding steps and units in the above-mentioned embodiments of the method for determining the scope of the protection area of the rail transit structure in a karst environment, which will not be elaborated here. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding process descriptions in the foregoing method embodiments, which will not be elaborated here.

[0278] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general-purpose systems may also be used in conjunction with the teachings based hereon. The structure required to construct such systems will be apparent from the above description. In addition, the present invention is not directed to any particular programming language. It should be appreciated that the teachings of the present invention can be implemented in a variety of programming languages, and the description of specific languages above is for the purpose of disclosing the best mode of the present invention.

[0279] In the specification provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0280] Similarly, it should be understood that in order to streamline this disclosure and assist in understanding one or more of the various inventive aspects, in the description of the exemplary embodiments of the present invention above, the various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the claims reflect, the inventive aspects lie in less than all of the features of the preceding disclosed single embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0281] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and disposed in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all the features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) can be replaced by an alternative feature providing the same, equivalent, or similar purpose.

[0282] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0283] Each component embodiment of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components according to the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for performing part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier signal, or in any other form.

[0284] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for determining the scope of a rail transit structure control protection zone in a karst environment, comprising: Obtain basic address data and structural parameters of existing structures, determine the location of existing structures in geological sections and the corresponding cover layer type; Based on the position of the existing structure in the geological section and the basic address data, the type of stratum in which the existing structure is located is determined; wherein the stratum type includes at least a karst layer and a cover layer; if the existing structure is in the karst layer, the method for determining the range of the control protection zone of the rail transit structure under the karst environment is terminated; if the existing structure is in the cover layer, the corresponding cover layer type is further determined; wherein the cover layer type includes at least a sand layer and a clay layer; The structural types of the existing structure include: interval tunnels, and underground stations; wherein the underground stations further include: open-cut stations, covered-cut stations, and mining stations; According to the type of covering layer corresponding to the location of the existing structure, a position relationship model between the existing structure and the external operation relative space is established; The position relationship model between the existing structure and the external operation relative space includes an hourglass model and a soil hole model; when the cover layer type is a sand layer, the hourglass model corresponds; when the cover layer type is a clay layer, the soil hole model corresponds; According to the structural type, structural parameters and corresponding covering layer type of the existing structure, based on the position relationship model, the range parameter calculation method under the critical condition is determined, and the control protection zone range under the corresponding critical condition is obtained; wherein, When the existing structure is a section tunnel and the covering layer is a sand layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly. When the existing structure is an open-cut or covered-cut station, if the cover layer is a sand layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly; When the structural type of the existing structure is a mining station, if the covering layer is a sand layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly.

2. The method for determining the range of the rail transit structure control protection zone under the karst environment according to claim 1 is characterized in that: The method of calculating the range parameters under critical conditions is determined based on the position relationship model according to the structural type, structural parameters and corresponding covering layer type of the existing structure, and the range of the control protection zone under the corresponding critical conditions is obtained, further comprising: When the structural type of the existing structure is an interval tunnel, the diameter D of the interval tunnel, the excavation depth H of the external working foundation pit, and the distance H2 from the center of the tunnel to the soil-rock interface are obtained according to the basic address data and the structural parameters of the existing structure; Determine the approach range L of the existing structure based on the diameter D of the interval tunnel L = 3D; According to the distance H2 from the tunnel center to the soil-rock interface, determine the limit range M of the tunnel affected by karst ground collapse Where θ is the collapse angle determined according to the hourglass model; According to the hourglass model, the geometric relationship between the range parameters under critical conditions is established to obtain the control protection zone range a under critical conditions. Wherein, N is the impact range of external operation, and N = 1.0H; If the cover layer is a clay layer, the soil hole model is used for calculation. Based on the geometric relationship in the soil hole model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly. According to the foundation address data and the structural parameters of the existing structure, the soil hole span B is obtained; Determine the approach range L of the existing structure based on the diameter D of the interval tunnel L = 3D; According to the soil tunnel span B, determine the limit range M of the tunnel affected by karst ground collapse M = 1.0B; According to the soil hole model, the geometric relationship between the range parameters under critical conditions is established to obtain the range of the control protection area under critical conditions. a=L+M+N=3D+B+H.

3. The method for determining the range of the rail transit structure control protection zone under the karst environment according to claim 1 is characterized in that: The method of calculating the range parameters under critical conditions is determined based on the position relationship model according to the structural type, structural parameters and corresponding covering layer type of the existing structure, and the range of the control protection zone under the corresponding critical conditions is obtained, further comprising: When the existing structure is an open-cut or covered-cut station, the excavation depth h of the open-cut station foundation pit and the thickness H1 of the covering layer are obtained according to the foundation address data and the structural parameters of the existing structure; Determine the approach range L of the existing structure based on the excavation depth h of the open-cut station foundation pit L = 2h; According to the thickness of the cover layer H1, determine the limit range M of the tunnel affected by karst ground collapse Where θ is the collapse angle determined according to the hourglass model; According to the hourglass model, the geometric relationship between the range parameters under critical conditions is established to obtain the control protection zone range a under critical conditions. If the cover layer is a clay layer, the soil hole model is used for calculation. Based on the geometric relationship in the soil hole model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly. According to the foundation address data and the structural parameters of the existing structure, the soil hole span B is obtained; Determine the approach range L of the existing structure based on the excavation depth h of the open-cut station foundation pit L = 2h; According to the soil tunnel span B, determine the limit range L of the tunnel affected by karst ground collapse M = 1.0B; According to the soil hole model, the geometric relationship between the range parameters under critical conditions is established to obtain the range of the control protection area under critical conditions. a=L+M+N=2h+B+H.

4. The method for determining the range of the rail transit structure control protection zone under the karst environment according to claim 1 is characterized in that: The method of calculating the range parameters under critical conditions is determined based on the position relationship model according to the structural type, structural parameters and corresponding covering layer type of the existing structure, and the range of the control protection zone under the corresponding critical conditions is obtained, further comprising: When the existing structure is a mining station, the tunnel span W and the cover thickness H1 are obtained according to the basic address data and the structural parameters of the existing structure; Determine the approach range L of the existing structure based on the rough tunnel span W L = 2.5W; According to the thickness of the cover layer H1, determine the limit range M of the tunnel affected by karst ground collapse Where θ is the collapse angle determined according to the hourglass model; According to the hourglass model, the geometric relationship between the range parameters under critical conditions is established to obtain the control protection zone range a under critical conditions. If the cover layer is a clay layer, the soil hole model is used for calculation. Based on the geometric relationship in the soil hole model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly. According to the foundation address data and the structural parameters of the existing structure, the soil hole span B is obtained; Determine the approach range L of the existing structure based on the rough tunnel span W L = 2.5W; According to the soil tunnel span B, determine the limit range M of the tunnel affected by karst ground collapse M = 1.0B; According to the soil hole model, the geometric relationship between the range parameters under critical conditions is established to obtain the range of the control protection area under critical conditions. a=L+M+N=2.5W+B+H.

5. A device for determining the range of a rail transit structure control protection zone in a karst environment, comprising: Parameter acquisition and type determination module, model building module and range determination module; wherein, The parameter acquisition and type determination module is used to obtain basic address data and structural parameters of existing structures, determine the location of existing structures in geological sections and the corresponding covering layer type; wherein, Based on the position of the existing structure in the geological section and the basic address data, the type of stratum in which the existing structure is located is determined; wherein the stratum type includes at least a karst layer and a cover layer; if the existing structure is in the karst layer, the method for determining the range of the control protection zone of the rail transit structure under the karst environment is terminated; if the existing structure is in the cover layer, the corresponding cover layer type is further determined; wherein the cover layer type includes at least a sand layer and a clay layer; The structural types of the existing structure include: interval tunnels, and underground stations; wherein the underground stations further include: open-cut stations, covered-cut stations, and mining stations The model building module is used to build a position relationship model between the existing structure and the external operation relative space according to the type of covering layer corresponding to the location of the existing structure; wherein, The position relationship model between the existing structure and the external operation relative space includes an hourglass model and a soil hole model; when the cover layer type is a sand layer, the hourglass model corresponds; when the cover layer type is a clay layer, the soil hole model corresponds; The range determination module is used to determine the range parameter calculation method under critical conditions based on the structural type, structural parameters and corresponding cover layer type of the existing structure and the position relationship model, and to obtain the control protection zone range under the corresponding critical conditions; wherein, When the existing structure is a section tunnel and the covering layer is a sand layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly. When the existing structure is an open-cut or covered-cut station, if the cover layer is a sand layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly; When the structural type of the existing structure is a mining station, if the covering layer is a sand layer, the hourglass model is used for calculation. Based on the geometric relationship in the hourglass model, the critical conditions for the external operation to affect the existing structure are determined, and the range parameter calculation method is determined accordingly.

6. A computing device comprising: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the method for determining the scope of the rail transit structure control protection zone under a karst environment according to any one of claims 1-4.

7. A computer storage medium, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute operations corresponding to the method for determining the scope of a rail transit structure control protection zone under a karst environment as described in any one of claims 1 to 4.

Images