A method for determining tank spacing between biogas fermentation tanks and oil and gas storage tanks

Abstract

The present invention provides a method for determining the tank spacing of a biogas fermentation tank and an oil and gas storage tank, and relates to the technical field of determining the tank spacing of a biogas fermentation tank and a single-base oil and gas storage tank, and aims to realize convenient and accurate acquisition of the settlement difference of different points of a circular tank and a foundation to obtain an appropriate tank spacing, comprising the following steps: according to the principle of equal compression modulus, the circular foundation of the first tank is equivalent to a square foundation, and the side length of the square foundation is obtained; according to the principle of equal area, the uniformly distributed load on the foundation of the second tank is equivalent to a square uniformly distributed load, and the second tank is adjacent to the first tank, and the side length of the square uniformly distributed load is obtained; the settlement difference of the approximate two end points in the diameter direction of the first tank is obtained; based on the value of the settlement difference, the appropriate spacing between the second tank and the first tank is obtained. The present invention has the advantage of simply and reliably obtaining an appropriate tank spacing.

Description

Technical Field

[0001] The invention relates to the technical field of determining the tank body spacing of a biogas fermentation tank and a single-base oil and gas storage tank, and in particular to a method for determining the tank body spacing of a biogas fermentation tank and an oil and gas storage tank. Background Art

[0002] In biogas fermentation tanks and independent oil and gas storage tank projects, there are often several or even dozens of tanks in one area.

[0003] When the tank is filled with medium, the mutual influence between the tanks is great, which is often reflected in the settlement of the tank foundation and the foundation, causing uneven settlement of the tank foundation and causing the tank to tilt. In order to specifically calculate the settlement and settlement difference of the tank foundation, the foundation additional stress coefficient is needed, but for tanks with a circular bottom, the calculation is more complicated, and there is currently a lack of a simple, effective and accurate calculation model for obtaining settlement data.

[0004] Therefore, it is necessary to design a method to obtain the settlement difference so as to conveniently and accurately determine the appropriate tank spacing. Summary of the invention

[0005] The object of the present invention is to provide a method for determining the tank spacing between biogas fermentation tanks and oil and gas storage tanks, which can achieve convenient and accurate acquisition of the appropriate tank spacing.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank comprises the following steps:

[0008] According to the principle of equal compression modulus, the circular foundation of the first tank body is equivalent to a square foundation, and the side length of the square foundation is obtained. ;

[0009] According to the principle of equal area, the uniformly distributed load on the foundation of the second tank is equivalent to a square uniformly distributed load. The second tank is adjacent to the first tank, and the side length of the square uniformly distributed load is obtained. ;

[0010] Obtaining the settlement difference of the approximate two end points of the first tank body along the diameter direction;

[0011] The appropriate distance value between the second tank body and the first tank body is obtained based on the value of the settlement difference.

[0012] Preferably, the method of converting the circular base of the first tank body into a square base according to the principle of equal compression modulus is:

[0013] ;

[0014] in, is the basic diameter of the first tank body.

[0015] Preferably, the method of converting the uniformly distributed load on the foundation of the second tank body into a square uniformly distributed load according to the principle of equal area is:

[0016] ;

[0017] in, is the diameter of the circular uniformly distributed load of the second tank.

[0018] Preferably, the method for obtaining the settlement difference of the approximate two end points of the first tank body along the diameter direction is:

[0019] Establishing a combined calculation model based on the square foundation and the square uniformly distributed load;

[0020] Calculating additional stress coefficients at multiple points based on the combined calculation model;

[0021] The sedimentation difference is obtained.

[0022] Preferably, the method for establishing a combined calculation model based on the square foundation and the square uniformly distributed load is:

[0023] The square foundation of the first tank body is regarded as the foundation square, and the square uniformly distributed load of the second tank body is regarded as the load square;

[0024] Get the base clearance between the base square and the load square :

[0025] ;

[0026] in, is the distance between the centers of the base square and the load square.

[0027] Preferably, the method for calculating the additional stress coefficients of multiple points based on the combined calculation model is:

[0028] A first base point and a second base point are set on the base square, wherein the first base point is the midpoint of the side of the base square closest to the load square, and the second base point is the midpoint of the side of the base square farthest from the load square;

[0029] The additional stress coefficients of the first base point and the second base point are obtained respectively by referring to the additional stress coefficient table given in the specification.

[0030] Preferably, the method of respectively obtaining the additional stress coefficient of the first base point and the second base point is:

[0031] The midpoint and bottom point of the side closest to the load square in the base square are marked as d and c respectively, and the midpoint and bottom point of the side farthest from the load square in the base square are marked as g and h respectively; the midpoint and bottom point of the side closest to the base square in the load square are marked as e and f respectively, and the midpoint and bottom point of the side farthest from the base square in the load square are marked as a and b respectively;

[0032] Get the first value under the base of rectangle abcd by looking up the table Additional stress coefficient of soil layer , by looking up the table to obtain the first Additional stress coefficient of soil layer ;

[0033] Get the bottom of the rectangle abhg by looking up the table Additional stress coefficient of soil layer , by looking up the table to obtain the first Additional stress coefficient of soil layer ;

[0034] Get the first base point below the base bottom surface respectively The additional stress coefficient of the soil layer and the second foundation point below the foundation bottom surface The additional stress coefficient of the soil layer :

[0035] ;

[0036] .

[0037] Preferably, obtaining the sedimentation difference The method is:

[0038] ;

[0039]

[0040]

[0041] in, and are the settlements of the first foundation point and the second foundation point respectively, is the additional pressure at the bottom of the second tank, is the empirical coefficient of settlement, The first tank body is located below the bottom of the foundation The compression modulus of the soil layer, The first tank body is located below the bottom of the foundation The distance from the soil layer to the bottom of the foundation, The number of soil layers divided under the bottom surface of the foundation.

[0042] Preferably, the method for obtaining the appropriate spacing value between the second tank body and the first tank body based on the value of the settlement difference is:

[0043] Determine the lower limit of the appropriate spacing between the first tank body and the second tank body according to the settlement difference according to the allowable value of the specification;

[0044] The appropriate spacing value between the first tank body and the second tank body is determined based on the appropriate spacing range according to actual factors, and the appropriate spacing value is not less than the appropriate spacing lower limit, and the actual factors include the actual site conditions.

[0045] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0046] The present invention can simplify the shape of the load on the tank foundation and the foundation, and realize the simple and effective calculation of the additional stress coefficient of the circular uniformly distributed load outside the circular foundation at each depth point under the circular foundation, thus laying a good foundation for obtaining the settlement difference;

[0047] The present invention can accurately calculate the additional stress at each depth point based on the additional stress coefficient at each depth point obtained under the circular foundation under the simplified foundation model, and finally calculate the settlement difference of the foundation;

[0048] The present invention uses the sedimentation difference as a basis to judge the appropriate distance between the two tanks, and the judging method is simple and reliable;

[0049] The invention has reasonable design and simple calculation, and can be applied to various tank storage planning scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic flow chart of a method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank provided in an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of the relationship between the position and shape of the base square and the load square provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0053] Example 1

[0054] This embodiment provides a method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank. Figure 1 , including the following steps:

[0055] According to the principle of equal compression modulus, the circular foundation of the first tank body is equivalent to a square foundation, and the side length of the square foundation is obtained. ;

[0056] According to the principle of equal area, the uniformly distributed load on the foundation of the second tank is equivalent to a square uniformly distributed load. The second tank is adjacent to the first tank, and the side length of the square uniformly distributed load is obtained. ;

[0057] Obtaining the settlement difference of the approximate two end points of the first tank body along the diameter direction;

[0058] The appropriate distance value between the second tank body and the first tank body is obtained based on the value of the settlement difference.

[0059] The significance of this embodiment is that it can calculate the additional stress coefficient of the circular uniformly distributed load outside the circular foundation at each depth point under the circular foundation, thereby calculating the additional stress at each depth point, and finally calculating the settlement difference of the foundation, providing a specific data basis for determining the spacing between tank bodies.

[0060] In this embodiment, the method of converting the circular foundation of the first tank body into a square foundation according to the principle of equal compression modulus is as follows:

[0061] ;

[0062] in, is the basic diameter of the first tank body.

[0063] The above basis is the equivalence of the compression modulus, and the method for establishing the compression modulus is:

[0064] ;

[0065] in, is the compression modulus, is the settlement influence coefficient, is the Poisson's ratio of the foundation, is a uniformly distributed load, is the foundation settlement, is the diameter of the circular foundation / square foundation. On this equivalent basis, we can get .

[0066] On the other hand, the method of converting the uniformly distributed load on the foundation of the second tank into a square uniformly distributed load according to the principle of equal area is as follows:

[0067] ;

[0068] in, is the diameter of the circular uniformly distributed load of the second tank.

[0069] As a preferred solution of this embodiment, the method for obtaining the settlement difference between the two ends of the first tank in the diameter direction is:

[0070] Establishing a combined calculation model based on the square foundation and the square uniformly distributed load;

[0071] Calculating additional stress coefficients at multiple points based on the combined calculation model;

[0072] The sedimentation difference is obtained.

[0073] Specifically, the method for establishing a combined calculation model based on the square foundation and the square uniformly distributed load is:

[0074] The square foundation of the first tank body is regarded as the foundation square, and the square uniformly distributed load of the second tank body is regarded as the load square;

[0075] Get the base clearance between the base square and the load square :

[0076] ;

[0077] in, is the distance between the centers of the base square and the load square.

[0078] Furthermore, the method for calculating the additional stress coefficients of multiple points based on the combined calculation model is:

[0079] A first base point and a second base point are set on the base square, wherein the first base point is the midpoint of the side of the base square closest to the load square, and the second base point is the midpoint of the side of the base square farthest from the load square;

[0080] The additional stress coefficients of the first base point and the second base point are obtained respectively by referring to the additional stress coefficient table given in the specification.

[0081] As a preferred solution, the method for respectively obtaining the additional stress coefficient of the first base point and the second base point is:

[0082] See also Figure 2 , mark the midpoint and bottom point of the side closest to the load square in the base square as d and c respectively, and mark the midpoint and bottom point of the side farthest from the load square in the base square as g and h respectively; mark the midpoint and bottom point of the side closest to the base square in the load square as e and f respectively, and mark the midpoint and bottom point of the side farthest from the base square in the load square as a and b respectively;

[0083] Get the first value under the base of rectangle abcd by looking up the table Additional stress coefficient of soil layer , by looking up the table to obtain the first Additional stress coefficient of soil layer ;

[0084] Get the bottom of the rectangle abhg by looking up the table Additional stress coefficient of soil layer , by looking up the table to obtain the first Additional stress coefficient of soil layer ;

[0085] It is worth noting that the table here can be found in Appendix K.0.1-2 of the Code for Design of Building Foundations. For example, for rectangle abcd, the length of the long side is , short side length , then the value of ad / dc, and then an additional stress coefficient can be found by comparing with Appendix K.0.1-2 at different depths. The additional stress coefficient corresponding to efcd can be found in the same way. Subtracting the two additional stress coefficients, we can get the additional stress coefficient of the uniformly distributed load of the rectangle abef at each corresponding depth. The product of the additional coefficient and the load is the additional stress within the depth range.

[0086] Get the first base point below the base bottom surface respectively The additional stress coefficient of the soil layer and the second foundation point below the foundation bottom surface The additional stress coefficient of the soil layer :

[0087] ;

[0088] .

[0089] Further, obtaining the sedimentation difference The method is:

[0090] ;

[0091]

[0092]

[0093] in, and are the settlements of the first foundation point and the second foundation point respectively, is the additional pressure at the bottom of the second tank, is the empirical coefficient of settlement, The first tank body is located below the bottom of the foundation The compression modulus of the soil layer, The first tank body is located below the bottom of the foundation The distance from the soil layer to the bottom of the foundation, The number of soil layers divided under the bottom surface of the foundation.

[0094] Finally, the method for obtaining the appropriate spacing value between the second tank body and the first tank body based on the value of the settlement difference is preferably:

[0095] Determine the lower limit of the appropriate spacing between the first tank body and the second tank body according to the settlement difference according to the allowable value of the specification;

[0096] The appropriate spacing value between the first tank and the second tank is determined based on the appropriate spacing range according to actual factors, and the appropriate spacing value is not less than the appropriate spacing lower limit, and the actual factors include the actual site conditions. It should be noted that the actual factors may also include the site size and the space required for tank ancillary equipment.

[0097] Generally speaking, the closer the tanks are to each other, the greater the settlement difference will be.

[0098] To sum up, this embodiment essentially adopts the principle of equal area to make a circular uniformly distributed load equivalent to a square uniformly distributed load, and adopts the principle of equal compression modulus to make a circular foundation equivalent to a square foundation, which solves the problem of calculating the stress coefficient of the circular uniformly distributed load outside the circular foundation at each depth point under the circular foundation, and also facilitates the calculation of the appropriate value of the spacing between different tanks. In an implementation case, a one-to-one mapping relationship between the settlement difference and the appropriate spacing range can be established.

[0099] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank, characterized in that: The following steps are involved: According to the principle of equal compression modulus, the circular foundation of the first tank body is equivalent to a square foundation, and the side length of the square foundation is obtained. ; According to the principle of equal area, the uniformly distributed load on the foundation of the second tank is equivalent to a square uniformly distributed load. The second tank is adjacent to the first tank, and the side length of the square uniformly distributed load is obtained. ; Obtaining the settlement difference of the approximate two end points of the first tank body along the diameter direction; Obtaining a suitable spacing value between the second tank body and the first tank body based on the value of the settlement difference; The method for obtaining the settlement difference of the approximate two end points of the first tank body along the diameter direction is: Establishing a combined calculation model based on the square foundation and the square uniformly distributed load; Calculating additional stress coefficients at multiple points based on the combined calculation model; obtaining the sedimentation difference; The method for establishing a combined calculation model based on the square foundation and the square uniformly distributed load is: The square foundation of the first tank body is regarded as the foundation square, and the square uniformly distributed load of the second tank body is regarded as the load square; Get the base clearance between the base square and the load square : ; in, is the distance between the centers of the base square and the load square; The method for calculating the additional stress coefficients of multiple points based on the combined calculation model is: A first base point and a second base point are set on the base square, wherein the first base point is the midpoint of the side of the base square closest to the load square, and the second base point is the midpoint of the side of the base square farthest from the load square; Obtain the additional stress coefficients of the first base point and the second base point respectively by looking up the additional stress coefficient table given in the specification; The method of respectively obtaining the additional stress coefficient of the first base point and the second base point is: The midpoint and bottom point of the side closest to the load square in the base square are marked as d and c respectively, and the midpoint and bottom point of the side farthest from the load square in the base square are marked as g and h respectively; the midpoint and bottom point of the side closest to the base square in the load square are marked as e and f respectively, and the midpoint and bottom point of the side farthest from the base square in the load square are marked as a and b respectively; Get the first value under the base of rectangle abcd by looking up the table Additional stress coefficient of soil layer , by looking up the table to obtain the first Additional stress coefficient of soil layer ; Get the bottom of the rectangle abhg by looking up the table Additional stress coefficient of soil layer , by looking up the table to obtain the first Additional stress coefficient of soil layer ; Get the first base point below the base bottom surface respectively The additional stress coefficient of the soil layer and the second foundation point below the foundation bottom surface The additional stress coefficient of the soil layer : ； ； Get the sedimentation difference The method is: ; in, and are the settlements of the first foundation point and the second foundation point respectively, is the additional pressure at the bottom of the second tank, is the empirical coefficient of settlement, The first tank body is located below the bottom of the foundation The compression modulus of the soil layer, The first tank body is located below the bottom of the foundation The distance from the soil layer to the bottom of the foundation, The number of soil layers divided under the bottom surface of the foundation.

2. A method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank according to claim 1, characterized in that: The method of converting the circular foundation of the first tank body into a square foundation according to the principle of equal compression modulus is as follows: ； in, is the basic diameter of the first tank body.

3. The method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank according to claim 1, characterized in that: The method of converting the uniformly distributed load on the foundation of the second tank into a square uniformly distributed load according to the principle of equal area is as follows: ； in, is the diameter of the circular uniformly distributed load of the second tank.

4. The method for determining the tank spacing between a biogas fermentation tank and an oil and gas storage tank according to claim 1, characterized in that: The method for obtaining the appropriate spacing value between the second tank body and the first tank body based on the value of the settlement difference is: Determine the lower limit of the appropriate spacing between the first tank body and the second tank body according to the settlement difference according to the allowable value of the specification; The appropriate spacing value between the first tank body and the second tank body is determined based on an appropriate spacing range according to actual factors, and the appropriate spacing value is not less than the appropriate spacing lower limit, and the actual factors include actual site conditions.

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