JP2007182709A - Underground storage tank design supporting device, its method, its program based on the design method, and program recording medium recording the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground storage tank design supporting device for allowing a person who has no knowledge regarding the design of an underground storage tank to easily design the scheme of the underground storage tank in accordance with conditions of installation. <P>SOLUTION: The underground storage tank design supporting device is provided for supporting the design of the underground storage tank in which water reservoir sets having cavities for storing rainwater are stacked up and down and the stacked water reservoir sets are arranged in horizontal rows. It comprises an information holding means 1, an input means 2, a stacked number computing means 3, a tank depth computing means 4, a safety coefficient computing means 5, a design acceptance or not determining means 6, and a position relationship display means 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underground storage tank design support device, an underground storage tank design support method, an underground storage tank design support program based on the design method, and a program recording medium recording the program.

  In a residential area or the like, a large amount of rainwater may be accumulated due to heavy rain, and the rainwater may be flooded into the residence. Therefore, in large-scale residential land development sites, conventionally, adjustment ponds have been created at intervals and scales commensurate with the development area. For example, the adjustment pond is formed by digging the ground about 1 m to form a storage portion such as rainwater, and a drainage groove from a surrounding residential area or a side groove of a road is connected to the storage portion. Such ponds can be used to temporarily store excess rainwater during heavy rains, etc. so that rainwater stays in the surrounding residential area, drains into sewage rivers, or rivers resulting from these. It is intended to prevent flooding.

  Moreover, as an adjustment pond, there exists a thing using the osmosis | permeation type storage part comprised so that rain water etc. may be osmose | permeated gradually to the ground by forming the circumference | surroundings of the storage part with a water-permeable sheet | seat. Thus, by forming the wall surface of the storage portion with a waterproof sheet, forming with a water permeable sheet, or forming the bottom with a waterproof sheet and forming the upper with a water permeable sheet, etc. , Functioning as a storage facility, a permeation facility, or a storage permeation facility.

There are various types of underground storage tanks such as rainwater as described above. In general, the water storage units having gaps for storing rainwater and the like are stacked up and down, and the stacked water storage It is an underground storage tank of a type formed by arranging units horizontally and vertically (see, for example, Patent Document 1). In the underground storage tank described in Patent Document 1, a plurality of container-like members are arranged vertically and horizontally and vertically, and the uppermost portion is provided with a covering means. Further, an underground storage tank as shown in FIG. 9 is also devised, in which the stagnant water units having an uneven shape as shown in FIGS. 6 and 7 are laminated as shown in FIG.
Japanese Patent Publication No. 4-26648

  By the way, the outline design of the above-mentioned type of underground storage tank, which is formed by vertically arranging horizontal water storage units that are configured by stacking the water storage units vertically, Based on this, calculate the depth of the storage tank by hand, and draw a schematic diagram of the storage tank's burial status (positional relationship in the height direction, such as the depth of the storage tank or the depth of the earth cover). From the positional relationship in the height direction, safety was confirmed by performing buoyancy calculations and the like. In this case, all necessary calculations are performed manually, and the overall design is performed manually by changing the surface area of the storage tank or changing the soil cover depth until safety can be confirmed. It was. Therefore, there were many mistakes.

  In addition, at the stage of underground storage tank proposal, there are many cases where the outline design of some proposed patterns is designed based on the installation conditions and the contents are presented and explained. In this case, all the proposed patterns It was necessary to design the outline by manual calculation, which was troublesome. In addition, since all calculations are performed manually, knowledge about design is required, and only a specific designer can design. In addition, even when some installation conditions are changed, recalculation has to be performed, which takes time. Therefore, there has been a demand for an underground storage tank design support device that can easily perform an outline design of an underground storage tank based on installation conditions, even for those who have no knowledge about design.

  Therefore, the present invention has been made to cope with such a situation, and even if there is no knowledge about the design of the underground storage tank, the outline design of the underground storage tank is designed based on the installation conditions. It is an object of the present invention to provide an underground storage tank design support apparatus and an underground storage tank design support method that can be easily performed.

  First, the underground storage tank design support device of the present invention will be described. The underground storage tank design support apparatus of the present invention uses the underground storage tank as a design support target. This underground storage tank is formed by vertically stacking water-spilling units having the same size with a gap for storing rainwater and the like, and arranging the stacked water-spilling units vertically and horizontally in the horizontal direction. FIG. 1 is a block diagram showing the configuration of an underground storage tank design support apparatus according to the present invention. In FIG. 1, the underground storage tank design support apparatus includes an information holding unit 1, an input unit 2, and a stacking number calculation unit 3 as basic parts.

  Among these, the information holding means 1 has a function of holding the dimensional information of the vertical a, the horizontal b, and the height c of the water stagnation unit and the porosity β (1> β> 0). The input means 2 has a function of inputting the planned storage amount V of the underground storage tank, the arrangement number m of the stagnant units in the vertical direction, and the arrangement number n of the stagnant units in the horizontal direction as input information. Have.

Then, the number-of-stacks calculating means 3 assumes that the number of layers of stagnant units in the depth direction is q, and INT [f (x)] is a value of only the integer part of the calculation result of f (x). Q, by a, b, and β held by, and V, m, and n inputted by the input means 2,
q = INT [{(V / β) / (a × b × m × n)} / c] +1
It has the function requested in

  In the underground storage tank that is supported by the above-described underground storage tank design support device, the amount and quantity of water stored in one water stagnation unit is determined from the size and structure of the water stagnation unit. The stored amount of the entire underground storage tank formed and arranged is an integral multiple of the amount of water stored in this one water-stagnation unit. However, the planned storage amount V based on the installation conditions of the underground storage tank is not necessarily an integral multiple of the amount of water that can be stored in the single water-stagnation unit.

  Therefore, in the above formula for obtaining the number of stacked water units q from the planned storage volume V, the planned storage volume V is calculated by multiplying the volume of the water storage unit by the product of the volume of the water storage unit and the void ratio. Dividing by the value multiplied by the number, the fractional part of the obtained quotient is rounded down to obtain only the integer part, and 1 (piece) is further added to the integer part to obtain the stacking number q. . In other words, the decimal point part of the quotient is a value smaller than 1 (piece), but this is deleted and 1 (piece) is added instead, so the number of stacked water units q obtained by this calculation q This value is a value that sufficiently satisfies the planned storage amount V.

  Therefore, according to the above-described underground storage tank design support apparatus, the input storage unit 2 allows the planned storage amount V of the underground storage tank, the number m of the horizontal stagnant units arranged in the horizontal direction, and the horizontal stagnant water. By inputting the unit arrangement number n, it is possible to reliably determine the number of stacked water-stagnation units that sufficiently satisfy the planned storage amount V.

Further, the underground storage tank design support device described above, provided with a tank depth calculating means 4 shown in FIG. 1, the tank depth calculating means 4, when the bath depth of the underground reservoir and h _t, information held and c held by means 1, by the q calculated by the stacked number calculating means 3 above, the h _t,
h _t = c × q
It is reasonable and reasonable to ask for

In the above underground storage tank design support apparatus, the safety of the underground storage tank can be calculated by the above underground storage tank design support apparatus by further doing the following. That is, the above-described underground storage tank design support apparatus includes the safety coefficient calculation means 5 shown in FIG. 1 and the information holding means 1 holds information on the density γ _{t of the} stagnant unit and the density γ _w of the rainwater. . Further, the input means 2 inputs information on the surface height (above sea level) G _L , ground water level (above sea level) h _w , earth cover depth h, and sediment density γ _s of the place where the underground storage tank is installed. Like that.

In the safety factor calculation means 5 described above, the design depth is h _d , the submergence depth is H _o , the stored water level is H _i , the earth load is P _s , the load due to the dead weight of the water-carrying unit is P _t , and groundwater The buoyancy due to the position is U _o , the buoyancy due to the stored water is U _i , H _i = 0 if there is no stored water in the underground storage tank, the safety factor in this case is S ₁ , and the underground storage tank is full H _i = h _t , and the safety factor in this case is S ₂ .

Then, is held by the information holding means 1, beta, gamma _t, and a gamma _w, and h _t which is calculated by the tank depth calculating unit 4, is input by the input means 2, G _{L d} , h _w , h, and γ _s , h _d , H _o , P _s , P _t , U _o , U _i , S ₁ , S ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _s = γ _s × h
P _t = γ _t (1-β) × h _{t
U o = γ w (H o} -H i) ( However, U _o = 0 in the case of U _o <= 0)
U _i = γ _w H _i (1-β)
S ₁ = (P _s + P _t ) / (U _o + U _i ) (where H _i = 0)
S ₂ = (P _s + P _t ) / (U _o + U _i ) (where H _i = h _t )
We ask for it.

In the above-mentioned underground storage tank design support device, the manual calculation calculates the safety factor of the complicated underground storage tank, the surface height G _{L of} the place where the underground storage tank is installed, the groundwater level h _w , the earth depth h, the earth and sand By inputting the information of the density γ _s by the input means 2, it can be easily and quickly obtained.

Moreover, you may make it equip said underground storage tank design assistance apparatus with the design quality determination means 6 shown in FIG. The design pass / fail judgment means 6 judges “design failure” when the smaller one of S ₁ and S ₂ calculated by the safety coefficient calculation means 5 is smaller than a predetermined value. Means. By doing in this way, it can be determined easily and rapidly whether the design based on the input information input by the input means 2 is defective.

Moreover, it is preferable to provide the positional relationship display means 7 shown in FIG. When the calculation by each of the above calculation means is completed, the positional relationship display means 7 has a tank depth h _t , surface height (above sea level) G _L , groundwater level (above sea level) h _w , earth cover depth h, design depth h _d, and a means for displaying the underground reservoir height direction positional relationship is the mutual relation of the submerged depth H _o graphically.

  By doing in this way, the underground tank height direction positional relationship based on the input information input by the input means 2 can be confirmed easily and rapidly.

Moreover, in said underground storage tank design assistance apparatus, the required soil depth of an underground storage tank can be calculated with said underground storage tank design assistance apparatus by doing as follows. That is, the above-described underground storage tank design support apparatus includes necessary soil cover calculation means, and the information holding means holds information on the density γ _{t of the} water-stagnation unit and the density γ _w of rainwater. In addition, information on the ground height (above sea level) _GL , groundwater level (above sea level) h _w , earth cover depth h, earth and sand density γ _s , and safety factor S of the place where the underground storage tank is installed is input by means of input. To be entered.

In the necessary soil cover calculation means, the design depth is h _d , the submergence depth is H _o , the stored water level is H _i , the load due to the dead weight of the water stagnation unit is P _t , and the buoyancy due to the groundwater level is U _o , the buoyancy due to standing water U _i, H _i = 0 in the case of empty without water stored underground reservoir, the necessary soil the depth of the case h _1, when the underground storage tank is full level is H _i = h _t, the necessary soil the depth of the case and h _2.

Then, β, γ _t and γ _w held by the information holding means, h _t calculated by the tank depth calculating means, and G _L , h input by the input means _{By w} , h, γ _s , and S, h _d , H _o , P _s , P _t , U _o , U _i , h ₁ , h ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
h ₁ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = 0)
h ₂ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = h _t )
We ask for it.

In the above-described underground storage tank design support device, the required soil cover depth of the complicated underground storage tank is calculated manually, the ground height G _{L of} the place where the underground storage tank is installed, the ground water level h _w , and the soil cover depth. By inputting information on h, earth and sand density γ _s , and safety factor S by the above input means, it can be easily and quickly obtained.

Moreover, you may make it equip said underground storage tank design assistance apparatus with a soil cover depth quality determination means. When the h input by the input means is smaller than the larger one of h ₁ and h ₂ calculated by the necessary cover calculating means, It is a means to determine. By doing in this way, it can be determined easily and promptly whether the earth covering depth h input by the input means is appropriate. Next, the underground storage tank design support method of the present invention will be described. The underground storage tank design support method of the present invention is an underground storage tank design support method executed by a computer. Like the above-described underground storage tank design support apparatus of the present invention, the above-described underground storage tank is targeted for design support. Yes.

  Said computer is provided with the memory | storage device with which the dimension information of the vertical a of the water-stagnation unit, width b, and height c and the porosity (beta) (1> (beta)> 0) were memorize | stored. The underground storage tank design support method of the present invention includes an input step and a stacking number calculation step, which are steps executed by the computer, as a basic part.

  Among these, the input step has a function of inputting the planned storage amount V of the underground storage tank, the arrangement number m of the stagnant units in the vertical direction, and the arrangement number n of the stagnant units in the horizontal direction as input information. Have.

In the stacking number calculation step, if the stacking number of the water-stagnation units in the depth direction is q and INT [f (x)] is a value of only the integer part of the calculation result of f (x), the storage unit of the computer Q is stored by a, b, c, and β stored, and V, m, and n input by the input step.
q = INT [{(V / β) / (a × b × m × n)} / c] +1
It has the function requested in

Moreover, the underground storage tank design support method described above, provided with a tank depth calculation step, the bath depth calculation step, the bath depth of the underground reservoir When h _t, is held by a computer of a storage device and c which are, by and q which are calculated by the stacking number of operation steps described above, the h _t,
h _t = c × q
It is reasonable to ask for

Further, in the above-described underground storage tank design support method, the safety of the underground storage tank can be calculated by the above-described underground storage tank design support method by doing the following. That is, the above-described underground storage tank design support method includes a safety coefficient calculation step, and information on the density γ _{t of the} stagnant unit and the density γ _w of rainwater is stored in the storage device of the computer. In addition, information on the surface height (above sea level) G _L , groundwater level (above sea level) h _w , earth cover depth h, and earth and sand density γ _s of the place where the underground storage tank is installed is input by the input step. To.

In the safety factor calculation step, the design depth is h _d , the submergence depth is H _o , the stored water level is H _i , the soil cover load is P _s , the load due to the dead weight of the water stagnation unit is P _t , and the buoyancy due to the groundwater level the U _o, buoyancy due to standing water U _i, H _i = 0 in the case of empty without water stored underground reservoir, the safety factor in this case S _1, if the underground storage tank is full level is H _i = h _t, a safety factor of this case and S _2.

Then, stored by the computer of the storage device, beta, gamma _t, and a gamma _w, and h _t that is calculated by the tank depth calculation step, inputted by the input step, G _L, By h _w , h and γ _s , h _d , H _o , P _s , P _t , U _o , U _i , S ₁ , S ₂ are
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _s = γ _s × h
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
S ₁ = (P _s + P _t ) / (U _o + U _i ) (where H _i = 0)
S ₂ = (P _s + P _t ) / (U _o + U _i ) (where H _i = h _t )
We ask for it.

Moreover, you may make it provide the design pass / fail judgment step in said underground storage tank design support method. This design pass / fail determination step is a step of determining “design failure” when the smaller one of S ₁ and S ₂ calculated in the tank depth calculation step is smaller than a predetermined value. It is.

In the above-described underground storage tank design support method, it is preferable that the computer includes a display unit and the above-described underground storage tank design support method includes a positional relationship display step. This positional relationship display step, when all the calculations in the above calculation steps are completed, the tank depth h _t , surface height (above sea level) G _L , groundwater level (above sea level) h _w , earth cover depth h, design depth it is h _d, and an underground reservoir height direction positional relationship is the mutual relation of the submerged depth H _o, a step of displaying on the display device.

Moreover, in the above-described underground storage tank design support method, the required depth of the underground storage tank can be calculated by the above-described underground storage tank design support method by doing the following. That is, the above-described underground storage tank design support method includes a necessary soil cover calculation step, and information on the density γ _{t of the} stagnation unit and the density γ _w of the rainwater is stored in the storage device of the computer. In addition, the information of the ground height (above sea level) _GL , groundwater level (above sea level) h _w , earth cover depth h, earth and sand density γ _s , safety factor S of the place where the underground storage tank is installed is obtained by the input step. To be entered.

In the necessary soil cover calculation step, the design depth is h _d , the submergence depth is H _o , the stored water level is H _i , the load due to the dead weight of the water stagnation unit is P _t , the buoyancy due to the groundwater level is U _o , and the stored water U _i , H _i = 0 if the underground storage tank is empty and there is no storage water, h ₁ is the required soil depth in this case, and H _i = h _t if the underground storage tank is full , the necessary soil the depth of case and h _2.

Then, β, γ _t and γ _w stored in the storage device of the computer, h _t calculated in the bath depth calculation step, and G _L , h _w input in the input step , H, γ _s , and S, and _let h _d , H _o , P _s , P _t , U _o , U _i , h ₁ , h ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
h ₁ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = 0)
h ₂ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = h _t )
We ask for it.

Moreover, you may make it provide the design pass / fail judgment step in said underground storage tank design support method. In this design pass / fail judgment step, if h input in the input step is smaller than the larger one of h ₁ and h ₂ calculated in the necessary soil cover calculation step, it is determined that the soil cover depth is inappropriate. It is means to do. By doing in this way, it can be determined easily and promptly whether the earth covering depth h input by the input step is appropriate. According to each above-mentioned underground storage tank design support method, the same operation and effect as the operation and effect obtained by using the above-described underground storage tank design support device can be obtained.

  The underground storage tank design support program of the present invention is a program provided with each step of each of the above underground storage tank design support methods, and is a program that can be executed by the above computer. The program medium of the present invention is a program medium in which the above underground storage tank design support program is recorded.

  According to the present invention, by inputting the planned storage amount V of the underground storage tank, the arrangement number m of the horizontal stagnant units in the horizontal direction, and the arrangement number n of the horizontal stagnant units, it is ensured. In addition, the number of stacked water units that sufficiently satisfy the planned storage amount V can be obtained.

In addition, in the manual calculation, the information on the safety factor of the complicated underground storage tank, the ground surface height G _L , the groundwater level h _w , the soil cover depth h, and the sediment density γ _s of the place where the underground storage tank is installed is input. Thus, it can be obtained easily and quickly. In addition, it is possible to easily and quickly determine whether the design based on the input information is defective. Further, each calculation can be performed easily and quickly even when the design is redone. In addition, the position relationship in the height direction of the underground storage tank based on the input information can be easily and quickly confirmed by graphic display.

In addition, in the manual calculation, the required soil depth of the complicated underground storage tank is calculated by calculating the ground height G _L , the groundwater level h _w , the soil depth h, the sediment density γ _s , By inputting the information of the safety factor S by the above input means, it can be easily and quickly obtained. Further, it is possible to easily and quickly determine whether or not the input soil cover depth h is appropriate.

  Therefore, even a person who has no knowledge about the design of the underground storage tank can easily perform the outline design of the underground storage tank based on the installation conditions.

  Hereinafter, the underground storage tank design support apparatus in the present embodiment will be described in detail with reference to the drawings. The underground storage tank design support apparatus in the present embodiment is an apparatus that supports design of an underground storage tank. In the present embodiment, the above-described underground storage tank 20 shown in FIG. 9 is used as a design support target.

  As hardware of the underground storage tank design support apparatus in the present embodiment, a workstation, a high-performance personal computer, or the like is used. Generally, an underground storage tank design support apparatus using these workstations and personal computers has a configuration as shown in FIG. That is, the underground storage tank design support apparatus 10 according to the present embodiment includes a CPU 11, a memory 12, a keyboard 13, a mouse 14, a display device 15, and a printer 16 in FIG. 2.

  The memory 12 of the above-described underground storage tank design support apparatus 10 is equipped with various software including the OS necessary for the present embodiment, and the function of the underground storage tank design support apparatus 10 in the present embodiment is as follows. It is realized by executing these software. That is, the information holding means 1, the input means 2, the stacking number calculating means 3, the bath depth calculating means 4, the safety coefficient calculating means 5, the design pass / fail judgment means 6, the positional relationship display means 7, the necessary soil covering calculating means described above. And the soil cover depth pass / fail judgment means is realized by the cooperation of these software and the above hardware.

  FIG. 9 is a cross-sectional view showing the structure of the above-described underground storage tank 20 that is a target of design support of the underground storage tank design support apparatus in the present embodiment. In FIG. 9, this underground storage tank 20 digs a hole from the ground surface 25 to the underground 26, hits the foundation concrete 22, and lays a protective sheet 23 and a water shielding sheet 24 or a water permeable sheet thereon, and On the sheet 24 or the water permeable sheet, the water stagnation unit 21 having the same size and shape as shown in FIGS. 6 and 7 is vertically stacked as shown in FIG. 8, and the stacked water stagnation unit 21 is horizontally arranged. A storage tank is formed by arranging vertically and horizontally, and the side surface of the storage tank is covered with a water-impervious sheet 24 or a water-permeable sheet, and then the excavated soil is backfilled, and the storage tank is embedded and completed.

  In addition, although the water shielding sheet 24 is used in FIG. 9, when the water shielding sheet 24 is used in this way, the underground storage tank 20 having a function of storing rainwater is obtained. However, if a water-permeable sheet is used, it becomes a rainwater water-permeable tank having a rainwater-permeable function, or a rainwater storage water-permeable tank having both functions by covering the lower part with a waterproof sheet and the upper part with a water-permeable sheet. You can also

  The underground storage tank 20 is connected to a water conduit 29 connected to a water collecting tank 28. The catchment basin 28 is connected to a gutter provided on a road or the like by a water conduit 27, and rainwater or the like is collected in the catchment basin 28. This rainwater or the like further flows into the underground storage tank 20 through the water conduit 29. In addition to being used for rainwater storage, the underground storage tank 20 can also be used for storage of factory wastewater, agricultural wastewater, and the like.

  FIG. 6 shows the shape of the water-stagnation unit 21 used in the above-described underground storage tank 20, FIG. 6 (a) is a front view of the water-spilling unit 21, and FIG. 6 (b) is a side view. FIG. 6C is a bottom view. 7 is a perspective view seen from the bottom surface side of the water-stagnation unit 21, and FIG. 8 is a perspective view seen from the bottom surface side of the water-stagnation unit 21 in a stacked state. As can be seen from FIG. 8 and FIG. 9, the stagnant units 21 are stacked one above the other with their orientations rotated 90 degrees for each stage.

  That is, the size of the water-spilling unit 21 is vertical a, horizontal b, and height c1, as shown in FIG. 6, but the top 21a of the water-spilling unit 21 shown in FIG. The water unit 21 is fitted on a recess 21c having a depth c2 provided on the bottom surface 21b shown in FIG. Further, a recess 21d having a depth c2 is provided on the bottom surface 21b shown in FIG. 6A of the water-stagnation unit 21, and the direction of the recess 21d is changed below the water-spilling unit 21 in the recess 21d. A top portion 21a shown in FIG. 6 (b) of the stagnant water units 21 is inserted and fitted into the concave portion 21d.

  Therefore, it is appropriate that the height of one of the water-stagnation units 21 in the stacked state is c obtained by subtracting the depth c2 from the height c1 of the water-stagnation unit 21 as shown in FIG. It is. Therefore, as information for calculation in the underground storage tank design support device 10, c is used as the height of one stagnant unit 21.

  Next, operation | movement of said underground storage tank design assistance apparatus 10 is demonstrated. The underground storage tank design support apparatus 10 is an apparatus that supports design of the underground storage tank 20 as described above. As this design support, first, information related to the stagnant water unit 21 constituting the underground storage tank 20 is stored in advance in the memory 12 of the underground storage tank design support apparatus 10 as memory holding information. And based on the installation conditions of the underground storage tank 20 which is a design object, the design conditions are input as input information using the keyboard 13 and the mouse 14 of the underground storage tank design support apparatus 10. Then, the underground storage tank design support device 10 calculates and outputs calculation information that is information necessary for designing the underground storage tank. That is, the operation of the underground storage tank design support apparatus 10 is to obtain calculation information by calculation using the memory holding information and the input information. Then, the design of the underground storage tank 20 is advanced using the calculation information calculated by the underground storage tank design support apparatus 10 and further using a CAD apparatus or the like.

  In the present embodiment, as a type of design support performed by the above-described underground storage tank design support device 10, the safety factor for the underground storage tank designed based on the set installation conditions is finally obtained, and the design support A design pass / fail judgment support group that judges pass / fail and a safety factor are set in advance, and the required soil depth is calculated based on the set safety factor to determine whether the soil depth in the installation conditions is appropriate. It is grouped into a soil cover depth suitability determination support group.

First, the design pass / fail judgment support group will be described. FIG. 3 is a table showing the memory holding information, input information, and calculation information related to the design pass / fail judgment support group. In FIG. 3, the memory holding information includes dimensional information on the vertical a, the horizontal b, and the height c, the porosity β, the density γ _t, and the rainwater density γ _w regarding the water stagnation unit 21. The input information includes the vertical arrangement number m, the horizontal arrangement number n, the planned storage amount V of the underground storage tank 20, the ground height G _L , the groundwater level h _w , There are earth depth h and earth density γ _s . The calculation information includes the number q of the stagnant units 21 and the tank depth h _t , the design depth h _d , the submergence depth H _o , the stored water level H _i , and the earth load P regarding the underground storage tank 20. _s, the load P _t due to the weight of ponding units 21, buoyancy U _o by groundwater level, the buoyancy U _i by standing water, and, safety factor S1, there is a S _2.

  Among these, the porosity β (1> β> 0) of the water-stagnation unit 21 in the memory retention information is the ratio of the volume of the space to the entire volume of the water-spill unit 21.

In addition, the vertical arrangement number m of the stagnant units 21 in the input information is the vertical arrangement number of the stagnant units 21 arranged vertically and horizontally in the horizontal direction. Similarly, the horizontal arrangement number n is the horizontal arrangement number n. Number of directional arrays. The ground height _GL of the installation location is the height from the sea level of the place where the underground storage tank 20 is installed, and the groundwater level h _w is the sea level at the place where the underground storage tank 20 is installed. The height from 0 to the surface of the groundwater, and the soil cover depth h is the depth from the ground surface to the upper surface of the underground storage tank 20.

In addition, the depth h _t of the underground storage tank 20 in the calculation information is the depth from the top surface to the bottom surface of the underground storage tank 20, and the design depth _hd is the bottom surface of the underground storage tank 20 from the ground surface. the depth of up to, and the submerged depth H _o, the depth from the surface of the ground water in the case of underground storage tank 20 is immersed in the layer of ground water to the bottom of the underground storage tank 20. Further, the reservoir water level H _i, the height from the bottom surface of the underground storage tank 20 when you are storing rainwater underground reservoir 20 to the upper surface of the stored water, the soil to be load P _s, ground The load due to the weight of the soil from the surface to the upper surface of the underground storage tank 20, and the load P _t due to the dead weight of the water-stagnation unit 21 is a load due to the gravity of the water-stagnation unit 21. The buoyancy U _o due to the groundwater level is the buoyancy exerted on the underground storage tank 20 by the groundwater at the place where the underground storage tank 20 is installed, and the buoyancy U _i due to the stored water is stored in the underground storage tank 20. This is the buoyancy that water exerts on the underground storage tank 20. The safety factor S is an index indicating whether or not the underground storage tank 20 can stably exist in the buried underground, and S ₁ is empty because there is no stored water in the underground storage tank 20. S ₂ is a safety factor when the underground storage tank 20 is full.

  FIG. 4 is a flowchart showing an operation related to the design pass / fail judgment support group in the underground storage tank design support device 10. The operations related to the design pass / fail judgment support group of the underground storage tank design support apparatus 10 are as follows: input step (S1), stacking number calculation step (S3), tank depth calculation step (S4), safety coefficient calculation step (S5), design It consists of a pass / fail judgment step (S6) and a positional relationship display step (S7).

  When an operation start is instructed by the keyboard 13 or the mouse 14 of the underground storage tank design support device 10, an input step (S1) is first executed. In the input step (S <b> 1), the above-described input information described in FIG. 3 is input by the keyboard 13 and the mouse 14 of the underground storage tank design support device 10. This input step (S1) is continued until the input of all input information is completed (S2).

When the input step (S1) is completed, the process proceeds to the stacking number calculation step (S3). In the stacking number calculating step (S3), the stacking number q, which is the number of the water-stagnation units 21 constituting the underground storage tank 20 stacked in the vertical direction, is calculated. This calculation is based on the above memory holding information and input information, where INT [f (x)] is the value of only the integer part of the calculation result of f (x).
q = INT [{(V / β) / (a × b × m × n)} / c] +1
Calculated with The calculation result is displayed on the display device 15 of the underground storage tank design support device 10 and can be printed by the printer 16.

  In the above-described underground storage tank 20, the amount of water that can be stored in one water stagnation unit 21 is determined from the size and structure of the water stagnation unit 21, and the water stagnation units 21 are stacked and arranged. The storage amount of the entire storage tank 20 is an integral multiple of the amount of water that can be stored by this single water-stagnation unit 21. However, the planned storage amount V based on the installation conditions of the underground storage tank 20 is not necessarily an integral multiple of the amount of water that can be stored by one stagnant unit 21.

  Therefore, in the above formula for obtaining the number q of stacked water units 21 from the planned storage volume V, the planned storage volume V is set to the product of the volume of the water storage unit 21 and the porosity, and the horizontal water is disposed in the horizontal direction. Dividing by the value of the number of units 21 and rounding off the decimal point, which is the decimal point part of the quotient obtained, to obtain only the integer part, adding 1 (piece) to this integer part, Seeking. That is, the decimal point portion of the quotient is a value smaller than 1 (piece), but since this is deleted and 1 (piece) is added instead, the number of stacked units of the stagnant units 21 obtained by this calculation The value of q is a value that sufficiently satisfies the planned storage amount V.

When the stacking number calculating step (S3) is completed, the process proceeds to the bath depth calculating step (S4). In the bath depth calculation step (S4), calculates the bath depth h _t of the underground storage tank 20. This calculation is based on the stacking number q of the stagnant units 21 calculated in the stacking number calculation step (S3) and the memory holding information and input information.
h _t = c × q
Calculated with The calculation result is displayed on the display device 15 of the underground storage tank design support device 10 and can be printed by the printer 16.

When the bath depth calculation step (S4) is completed, the process proceeds to a safety coefficient calculation step (S5). In the safety factor calculation step (S5), the safety factors S ₁ and S ₂ of the underground storage tank 20 are calculated. The calculation necessary for the calculation of the safety factor is performed before the calculation of the safety factor. These operations, a tank depth h _t of the underground storage tank 20, which is calculated at the bath depth calculation step (S4), takes place on the basis of the above-memory information and the input information. The contents of these calculations will be described below.

First, the following calculation is performed.
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _s = γ _s × h
P _t = γ _t (1-β) × h _t

Then, P _s obtained above, and, together with the use of P _t, as the reservoir water level H _i = 0, performing the following calculation in the case of empty without water stored underground reservoir 20, in this case determine the safety factor S _{1.
U o = γ w (H o} -H i) ( However, U _o = 0 in the case of U _o <= 0)
U _i = γ _w H _i (1-β)
S ₁ = (P _s + P _t ) / (U _o + U _i )

Then, P _s obtained above, and, together with the use of P _t, as the reservoir water level H _i = Sofuka of h _t, performs the following calculation in case the underground storage tank 20 is filled with water, in this case determine the safety factor S _{2.
U o = γ w (H o} -H i) ( However, U _o = 0 in the case of U _o <= 0)
U _i = γ _w H _i (1-β)
S ₂ = (P _s + P _t ) / (U _o + U _i )

  The calculation result is displayed on the display device 15 of the underground storage tank design support device 10 and can be printed by the printer 16.

When the safety coefficient calculation step (S5) ends, the process proceeds to a design pass / fail judgment step (S6). In the design quality determination step (S6), the smaller one of the calculated S ₁ and S ₂ by the safety factor calculation step (S5) is, in the case of more than a predetermined value determined in advance, "Design good" If it is smaller than a predetermined value, it is determined as “design failure”. This result is displayed on the display device 15 of the underground storage tank design support device 10. It is also possible to print with the printer 16.

  When it is determined as “design failure”, the design condition is changed by changing at least a part of the installation conditions of the underground storage tank 20 that is the object of the design, and the changed design condition is used as input information. Repeat each step from the beginning.

  As a method of redoing, it is common to change the value of the soil cover depth h of the input information. According to this method, it is only necessary to change the depth at which the underground storage tank 20 is embedded without changing the size of the underground storage tank 20, so that there is no restriction on the depth at which the underground storage tank 20 is installed. Is convenient.

When the design pass / fail determination step (S6) ends, the process proceeds to a positional relationship display step (S7). In the positional relationship display step (S7), Sofuka of h _t, ground height G _L, groundwater level h _w, soil the depth h, the design depth h _d, and, in relation to each other in the submerged depth H _o A certain underground storage tank height direction positional relationship is displayed on the display device 15 of the underground storage tank design support apparatus 10 as a graphic. FIG. 5 shows an example in which the positional relationship in the height direction of the underground storage tank is displayed graphically. Further, the positional relationship in the height direction of the underground storage tank can be printed by the printer 16.

Next, operation | movement of the underground storage tank design assistance apparatus 10 regarding a covering depth appropriateness determination assistance group is demonstrated. FIG. 10 is a table showing the memory holding information, the input information, and the calculation information regarding the soil cover depth suitability determination support group. The memory holding information, input information, and calculation information shown in FIG. 10 are almost the same as the memory holding information, input information, and calculation information shown in FIG. 3 of the above-described design pass / fail judgment support group. As the input information, the safety factor S related to the underground storage tank is added, and as the calculation information, the safety coefficients S ₁ and S ₂ related to the underground storage tank are deleted, and the necessary covering depths h ₁ and h ₂ are obtained. This is an added point. The safety factor S is a value set in advance, and 1.2 is generally used. The required soil cover depths h ₁ and h ₂ are values calculated using the preset safety factor S, and the required soil cover depth for the underground storage tank designed based on the set installation conditions. That's it.

  FIG. 11 is a flowchart showing the operation related to the soil cover depth suitability determination support group in the underground storage tank design support device 10. The operation related to the suitability determination support group of the underground storage tank design support apparatus 10 includes an input step (S11), a stacking number calculation step (S13), a tank depth calculation step (S14), and a required soil depth calculation step (S15). , And a soil cover depth suitability determination step (S16).

  The input step (S11) is almost the same as the input step (S1) in the flowchart of FIG. 3 relating to the design pass / fail judgment support group. The input step (S1) is different from the input step (S1) in the input of the flowchart of FIG. In addition to the input information input in step (S1), a safety factor S related to the underground storage tank is added. This input step (S11) is continued until the input of all input information is completed (S12).

  When the input step (S11) is completed, the process proceeds to the stacking number calculation step (S13). The stacking number calculation step (S13) is completely the same as the stacking number calculation step (S3) in the flowchart of FIG. The same. The bath depth calculation step (S14) performed after the stacking number calculation step (S13) is also the same as the bath depth calculation step (S4) in the flowchart of FIG.

When the bath depth calculation step (S14) is completed, the process proceeds to the required soil depth calculation step (S15). In the required soil cover depth calculation step (S15), the required soil cover depths h ₁ and h ₂ of the underground storage tank 20 are calculated. Performed before depth calculation. These calculations are substantially the same as the safety coefficient calculation step (S5) in the flowchart of FIG. 3 regarding the design pass / fail judgment support group. That is, first, the following calculation is performed.
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _t = γ _t (1-β) × h _t

Next, while using _Pt obtained above and setting the stored water level H _i = 0, the following calculation is performed when there is no stored water in the underground storage tank 20 and it is empty. h ₁ is obtained.
_{U o = γ w (H o} -H i) ( However, U _o = 0 in the case of U _o <= 0)
U _i = γ _w H _i (1-β)
h ₁ = {S × (U _o + U _i ) −P _t } / γ _s

Next, with use of the P _t obtained above, as a reservoir water level H _i = Sofuka of h _t, underground storage tank 20 performs the following calculation in the case of full water, required soil the depth of the case Find h ₂ .
_{U o = γ w (H o} -H i) ( However, U _o = 0 in the case of U _o <= 0)
U _i = γ _w H _i (1-β)
h ₂ = {S × (U _o + U _i ) −P _t } / γ _s

  The calculation result is displayed on the display device 15 of the underground storage tank design support device 10 and can be printed by the printer 16.

When the necessary soil cover depth calculating step (S15) is completed, the process proceeds to a soil cover depth suitability determining step (S16). In the soil cover depth suitability determining step (S16), the soil cover depth h, which is input information related to the installation location, is calculated from the values of h ₁ and h ₂ calculated in the necessary soil cover depth calculating step (S15). If it is smaller than the larger one, it is determined that the soil cover depth is inappropriate. This result is displayed on the display device 15 of the underground storage tank design support device 10. It is also possible to print with the printer 16.

  When it is determined that “the soil cover depth is inappropriate”, the design condition is changed by changing at least a part of the installation conditions of the underground storage tank 20 to be designed, and the changed design condition is input. As information, the above steps are repeated from the beginning.

  As a method of redoing, it is common to change the value of the soil cover depth h of the input information. According to this method, it is only necessary to change the depth at which the underground storage tank 20 is embedded without changing the size of the underground storage tank 20, so that there is no restriction on the depth at which the underground storage tank 20 is installed. Is convenient.

  According to the above-described underground storage tank design support device 10, the planned storage amount V of the underground storage tank 20, the arrangement number m of the vertical stagnant units 21 in the horizontal direction, and the arrangement of the horizontal stagnant units 21. By inputting the number n to the underground storage tank design support device 10, the number of stacked water units 21 that sufficiently satisfy the planned storage amount V can be obtained.

In addition, in the manual calculation, the safety factor of the complicated underground storage tank 20 is obtained, and the information on the ground height G _L , the groundwater level h _w , the soil depth h, and the sediment density γ _s of the place where the underground storage tank 20 is installed is obtained. By inputting, it can be obtained easily and quickly. In addition, it is possible to easily and quickly determine whether the design based on the input information is defective. Further, each calculation can be performed easily and quickly even when the design is redone. In addition, the position relationship in the height direction of the underground storage tank based on the input information can be easily and quickly confirmed by graphic display.

In addition, in the manual calculation, the required soil depth of the complicated underground storage tank is calculated by calculating the ground height G _L , the groundwater level h _w , the soil depth h, the sediment density γ _s , By inputting the information of the safety factor S by the above input means, it can be easily and quickly obtained. Further, it is possible to easily and quickly determine whether or not the input soil cover depth h is appropriate.

  Therefore, even a person who has no knowledge about the design of the underground storage tank can easily perform the outline design of the underground storage tank based on the installation conditions.

  In the present embodiment, as shown in FIGS. 6 and 7, the underground storage tank having the same size and shape and the stackable water storage units 21 stacked is used as a design support of the underground storage tank design support apparatus 10. It is targeted. However, the water stagnation unit used for the underground storage tank that is the target of design support is not limited to this, and the shape of the water stagnation unit may be different as long as it is the same size and can be stacked. Such an underground storage tank formed by stacking a plurality of types of water-stagnation units having the same size and different shapes can also be a target of design support of the underground storage tank design support apparatus according to the present invention.

It is the block diagram which showed the structure of the underground storage tank design assistance apparatus of this invention. It is the block diagram which showed the structure of the underground storage tank design assistance apparatus in this Embodiment. It is the table | surface which showed the memory holding information regarding the design quality determination support group of the underground storage tank design assistance apparatus in this Embodiment, input information, and calculation information. It is the flowchart which showed the operation | movement regarding the design quality determination support group of the underground storage tank design assistance apparatus in this Embodiment. It is a graphic figure of the underground storage tank height direction positional relationship displayed with the underground storage tank design assistance apparatus in this Embodiment. (A) is a front view, (b) is a side view, and (c) is a bottom view of a stagnation unit used in an underground storage tank that is a target of design support in the present embodiment. It is the perspective view seen from the bottom face side of the water retention unit used for the underground storage tank which is the object of the design support in this Embodiment. It is the perspective view seen from the bottom face side of the stacked water-stagnation unit used for the underground storage tank which is the object of the design support in this Embodiment. It is sectional drawing which showed the structure of the underground storage tank which is the object of the design assistance in this Embodiment. It is the table | surface which showed the memory holding information, input information, and calculation information regarding the earth covering depth appropriateness determination support group of the underground storage tank design support apparatus in this Embodiment. It is the flowchart which showed the operation | movement regarding the earth covering depth appropriateness determination support group of the underground storage tank design assistance apparatus in this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Information holding means 2 Input means 3 Stack number calculation means 4 Tank depth calculation means 5 Safety coefficient calculation means 6 Design pass / fail judgment means 7 Position relation display means 10 Underground storage tank design support device 11 CPU
DESCRIPTION OF SYMBOLS 12 Memory 13 Keyboard 14 Mouse 15 Display device 16 Printer 20 Underground storage tank 21 Stagnating unit 21a Top part 21b Bottom surface 21c Concave part 21d Concave part 22 Base concrete 23 Protection sheet 24 Water shielding sheet 25 Ground surface 26 Underground 27 Conduit pipe 28 Catchment 29 Water guide pipe a Vertical length of the water-carrying unit b Horizontal width of the water-carrying unit c Height of the water-carrying unit V Planned storage volume of the underground storage tank m Number of arrangement of the water-contained units in the vertical direction n Number of arrangement of the clogged units in the horizontal direction q stacking number h _t underground reservoir tank depth β ponding unit of porosity gamma _t ponding surface elevations of the surroundings density G _L underground reservoir density gamma _w rainwater is installed in the unit _L of ponding unit
h _w Groundwater level h _w Soil depth γ _s Sediment density h _d Design depth H _o Submergence depth H _i Reservoir level P _s Soil load P _t Load due to dead weight of water aquifer unit U _o Buoyancy due to groundwater level U _i Buoyancy due to stored water S ₁ safety factor S ₂ safety factor

Claims (16)

Design support is provided for underground storage tanks formed by stacking up and down stagnant units of the same size with gaps for storing rainwater and the like, and arranging the stacked stagnant units vertically and horizontally in the horizontal direction. An underground storage tank design support device,
Information holding means for holding the dimensional information of the vertical a, the horizontal b, and the height c of the water-holding unit and the porosity β (1>β>0);
Input means for inputting the planned storage amount V of the underground storage tank, the arrangement number m of the stagnant units in the vertical direction, and the arrangement number n of the stagnant units in the horizontal direction as input information;
A stack number calculating means,
When the number of stacked units in the depth direction is q and INT [f (x)] is the value of only the integer part of the calculation result of f (x), the stack number calculating means Q held by a, b, c, and β, and V, m, and n input by the input means,
q = INT [{(V / β) / (a × b × m × n)} / c] +1
An underground storage tank design support device characterized by being obtained by: While equipped with a bath depth calculation means,
Cistern depth calculating means, when the bath depth of the subsurface reservoir and h _t, and c being held by said information holding means, by the q which is calculated by the stacking number calculating means, the h _t ,
h _t = c × q
The underground storage tank design support device according to claim 1, which is obtained by: With safety factor calculation means,
The information holding means holds information on the density γ _{t of the} stagnant unit and the density γ _w of rainwater,
By the input means, information on the surface height (above sea level) _GL , the groundwater level (above sea level) h _w , the earth cover (hiding depth) depth h, and the sediment density γ _s of the place where the underground storage tank is installed is obtained. As input
The safety coefficient calculation means includes
Design depth h _d , submergence depth H _o , reservoir water level H _i , soil cover load P _s , load due to dead weight of stagnant unit P _t , buoyancy due to groundwater level U _o , buoyancy due to reservoir water U _i , H _i = 0 if the underground storage tank is empty without storage water, the safety factor in this case is S ₁ , and H _i = h _t if the underground storage tank is full, in this case Let S _{2 be} the safety factor of
Β, γ _t , and γ _w held by the information holding means,
And h _t are calculated by the tank depth calculating means,
Is input by the input unit, G _L, h _w, h, and, by the gamma _s,
h _d , H _o , P _s , P _t , U _o , U _i , S ₁ , S ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _s = γ _s × h
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
S ₁ = (P _s + P _t ) / (U _o + U _i ) (where H _i = 0)
S ₂ = (P _s + P _t ) / (U _o + U _i ) (where H _i = h _t )
The underground storage tank design support apparatus according to claim 2 obtained by claim 3. With design pass / fail judgment means,
4. The design pass / fail judgment means judges “design failure” when the smaller one of S ₁ and S ₂ calculated by the safety coefficient calculation means is smaller than a predetermined value. The underground storage tank design support device described. The bath depth h _t the surface height (altitude) G _L, mutual the groundwater level (above sea level) h _w the soil to be depth h, the design depth h _d, and the submerged depth H _o In addition to having a positional relationship display means for graphically displaying the positional relationship in the height direction of the underground storage tank,
The underground storage tank design support device according to claim 3 or 4, wherein the positional relationship display means displays the positional relationship in the height direction of the underground storage tank when calculation by each calculation means is completed. In addition to the necessary soil cover calculation means,
The information holding means holds information on the density γ _{t of the} stagnant unit and the density γ _w of rainwater,
By the input means, information on the surface height (above sea level) _GL , ground water level (above sea level) h _w , earth cover depth h, earth and sand density γ _s , and safety factor S of the place where the underground storage tank is installed is obtained. As input
The necessary soil cover calculating means is:
Design depth is h _d , submergence depth is H _o , reservoir water level is H _i , load due to dead weight of stagnant unit is P _t , buoyancy due to groundwater level is U _o , buoyancy due to stored water is U _i , H _i = 0 if the tank is empty with no stored water, h ₁ is the required depth of the cover in this case, H _i = h _t if the underground storage tank is full, the required cover is in this case If the depth is h ₂ ,
Β, γ _t , and γ _w held by the information holding means,
And h _t which is calculated by the tank depth calculating means,
With G _L , h _w , h, γ _s , and S input by the input means,
h _d , H _o , P _s , P _t , U _o , U _i , h ₁ , h ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
h ₁ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = 0)
h ₂ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = h _t )
The underground storage tank design support apparatus according to claim 2 obtained by claim 3. It is equipped with a soil cover depth pass / fail judgment means,
When the h input by the input unit is smaller than the larger one of h ₁ and h ₂ calculated by the required soil calculation unit, The underground storage tank design support apparatus according to claim 6, which is determined as “inappropriate”. Design support is provided for underground storage tanks formed by stacking up and down stagnant units of the same size with gaps for storing rainwater and the like, and arranging the stacked stagnant units vertically and horizontally in the horizontal direction. An underground storage tank design support method executed by a computer,
The computer includes a storage device in which dimensional information of the vertical a, the horizontal b, and the height c of the water-stagnation unit and the porosity β (1>β> 0) are stored.
Steps performed by the computer,
An input step in which the planned storage amount V of the underground storage tank, the arrangement number m of the stagnant units in the vertical direction, and the arrangement number n of the stagnant units in the horizontal direction are input as input information;
A stacking number calculating step, and
In the stacking number calculating step, when the stacking number of the stagnant units in the depth direction is q and INT [f (x)] is a value of only the integer part of the calculation result of f (x), the storage device of the computer Q, by a, b, c, and β stored in, and V, m, and n input by the input step,
q = INT [{(V / β) / (a × b × m × n)} / c] +1
An underground storage tank design support method characterized in that it is obtained by: While having a bath depth calculation step,
Cistern depth calculation step, when the bath depth of the subsurface reservoir and h _t, and c which is held by the storage device of the computer, by the q which is calculated by the stacking number calculation step, h _t The
h _t = c × q
The underground storage tank design support method of Claim 8 calculated | required by. With a safety factor calculation step,
The storage device of the computer stores information on the density γ _{t of the} stagnant unit and the density γ _w of rainwater,
In the input step, information on the ground height (above sea level) _GL , groundwater level (above sea level) h _w , earth cover depth h, and earth and sand density γ _s of the place where the underground storage tank is installed is input. ,
The safety coefficient calculation step includes:
Design depth h _d , submergence depth H _o , reservoir water level H _i , soil cover load P _s , load due to dead weight of stagnant unit P _t , buoyancy due to groundwater level U _o , buoyancy due to reservoir water U _i , H _i = 0 if the underground storage tank is empty without storage water, the safety factor in this case is S ₁ , and H _i = h _t if the underground storage tank is full, in this case Let S _{2 be} the safety factor of
Β, γ _t , and γ _w stored in the storage device of the computer,
And h _t which is calculated by the tank depth calculation step,
By _GL , h _w , h, and γ _s input by the input step,
h _d , H _o , P _s , P _t , U _o , U _i , S ₁ , S ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _s = γ _s × h
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
S ₁ = (P _s + P _t ) / (U _o + U _i ) (where H _i = 0)
S ₂ = (P _s + P _t ) / (U _o + U _i ) (where H _i = h _t )
The underground storage tank design support method of Claim 9 calculated | required by. With a design pass / fail judgment step,
11. The design pass / fail determination step determines “design failure” when the smaller one of S ₁ and S ₂ calculated by the safety coefficient calculation step is smaller than a predetermined value. Described underground storage tank design support method. The computer includes a display device,
The tank depth h _t, the surface height (altitude) G _L, mutual the groundwater level (above sea level) h _w, the soil to be depth h, the design depth h _d, and the submerged depth H _o It is equipped with a positional relationship display step that graphically displays the positional relationship in the height direction of the underground storage tank, which is the relationship of
The underground storage tank design support method according to claim 10 or 11, wherein the positional relation display step displays the positional relation in the height direction of the underground storage tank on the display device when all the calculations in the respective calculation steps are completed. In addition to the necessary soil cover calculation step,
The storage device of the computer stores information on the density γ _{t of the} stagnant unit and the density γ _w of rainwater,
By the input step, information on the surface height (above sea level) G _L , ground water level (above sea level) h _w , earth cover depth h, earth and sand density γ _s , and safety factor S of the place where the underground storage tank is installed is obtained. As input
The necessary soil cover calculating step includes:
Design depth is h _d , submergence depth is H _o , reservoir water level is H _i , load due to dead weight of stagnant unit is P _t , buoyancy due to groundwater level is U _o , buoyancy due to stored water is U _i , H _i = 0 if the tank is empty with no stored water, h ₁ is the required depth of the cover in this case, H _i = h _t if the underground storage tank is full, the required cover is in this case If the depth is h ₂ ,
Β, γ _t , and γ _w stored in the storage device of the computer,
And h _t which is calculated by the tank depth calculation step,
With G _L , h _w , h, γ _s , and S input by the input step,
h _d , H _o , P _s , P _t , U _o , U _i , h ₁ , h ₂ ,
h _d = h + h _t
H _o = h _d − ( _GL− h _w )
P _t = γ _t × (1−β) × h _t
U _o = γ _w × (H _o −H _i ) (However, when U _o <= 0, U _o = 0)
U _i = γ _w × H _i × (1-β)
h ₁ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = 0)
h ₂ = {S × (U _o + U _i ) −P _t } / γ _s (where H _i = h _t )
The underground storage tank design support method of Claim 9 calculated | required by. While having a soil cover depth pass / fail judgment step,
If the h input by the input step is smaller than the larger one of h ₁ and h ₂ calculated by the necessary soil cover calculating step, the soil cover depth quality determining step The underground storage tank design support method according to claim 13, which is determined as “inappropriate”.   The underground storage tank design assistance program which is provided with each step which the underground storage tank design assistance method of any one of Claims 8-14 has, and the computer can execute.   A program recording medium in which the underground storage tank design support program according to claim 15 is recorded.

Images