US20230091069A1 - Storage Tank with Annulus - Google Patents
Storage Tank with Annulus Download PDFInfo
- Publication number
- US20230091069A1 US20230091069A1 US17/945,634 US202217945634A US2023091069A1 US 20230091069 A1 US20230091069 A1 US 20230091069A1 US 202217945634 A US202217945634 A US 202217945634A US 2023091069 A1 US2023091069 A1 US 2023091069A1
- Authority
- US
- United States
- Prior art keywords
- shell
- annulus
- tank
- lateral arm
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 26
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/02—Containers for fluids or gases; Supports therefor
- E04H7/04—Containers for fluids or gases; Supports therefor mainly of metal
- E04H7/06—Containers for fluids or gases; Supports therefor mainly of metal with vertical axis
Definitions
- the present disclosure relates to storage tanks, and particularly to above ground storage tanks which are used to store fluids of all types.
- ASCE7 In the United States, minimum design loads and various other criteria for buildings and other structures are set forth in ASCE7. ASCE7 describes the means for determining loads for soil, flood, tsunami, snow, rain, atmospheric ice, earthquake, and wind, and their combinations for general structural design.
- these requirements include a seismic uplift requirement.
- Seismic uplift in general, refers to upward vertical loads on a structure produced by lateral seismic accelerations that result in lateral loads applied to the structure above its base foundation due to structure inertia. These lateral loads attempt to overturn the structure resulting in downward loads on one side of the structure and uplift loads on the other.
- the uplift load produced by overturning is seismic uplift. Additional seismic uplift results from vertical seismic accelerations that result in vertical loads due to structure inertia.
- Current provisions in ASCE7 limit the seismic uplift to a level not to exceed the counteracting weight of materials above the foundation.
- a tank for retaining material in one aspect, includes a foundation for supporting the material, a shell partially embedded into the foundation, and an annulus connected to the shell.
- the shell is configured to retain the material in a material storage area enclosed by the shell. A portion of the annulus extends beneath the material storage area.
- the lateral arm when viewed in vertical cross-section, extends at about a right angle from the vertical arm.
- the annulus includes an annular plate, the annular plate is embedded into the foundation, and the annular plate abuts the lateral arm and is positioned between the lateral arm and the material storage area.
- the annular plate has an outermost diameter that abuts an innermost diameter of the vertical arm.
- the shell is generally cylindrical, a curved wall of the shell extends vertically away from the foundation, and, when viewed in vertical cross section, the lateral arm extends from the shell in a direction away from a centerline of the generally cylindrical shell.
- the annulus further includes an annular plate, the annular plate is connected to and abuts the lateral arm, and, when viewed in vertical cross section, the annular plate extends from the lateral arm, past the shell, and back towards the centerline.
- the annular plate is formed integrally with the lateral arm.
- the annulus is a first annulus, and when viewed in vertical cross-section, the first annulus includes a first vertical arm and a first lateral arm.
- the first vertical arm extends along and is connected to the shell and the first lateral arm extends away from the shell.
- the tank also includes a second annulus, and, when viewed in vertical cross-section, the second annulus includes a second vertical arm and a second lateral arm.
- the second vertical arm extends along and is connected to the shell, and the second lateral arm extends in a direction away from the shell that is different than the first lateral arm.
- the shell is generally cylindrical, a curved wall of the shell extends vertically away from the foundation, and, when viewed in vertical cross section, the first lateral arm extends beneath the material storage area and the second lateral arm extends in a direction away from a centerline of the generally cylindrical shell.
- the first lateral arm when viewed in vertical cross-section, has a longest dimension that is longer than a longest dimension of the first lateral arm.
- the annulus is entirely embedded within the foundation, and an interface between the annulus and the shell is entirely embedded within the foundation.
- a method of installing a tank includes connecting the annulus to the shell and embedding the annulus and a bottom portion of the shell into the foundation.
- a tank assembly in yet another aspect, includes a shell enclosing an interior volume and an annulus.
- the annulus When viewed in vertical cross-section, the annulus includes a vertical arm and a lateral arm. The vertical arm extends along the shell, the lateral arm extends away from the shell, and the vertical arm is connected to the shell.
- a method of installing a tank assembly includes connecting the annulus to the shell and embedding the annulus and a bottom portion of the shell into a foundation such that the shell forms sides of an area configured to retain material and the foundation forms a bottom of the area configured to retain material.
- annular plate is mechanically connected to the lateral arm and the annular plate extends further than the lateral arm toward the centerline of the shell.
- the foundation comprises concrete.
- the foundation is embedded into the ground.
- FIG. 1 is an isometric, section view of a tank.
- FIG. 2 is another section view of the tank of FIG. 1 .
- FIG. 3 is top plan view of the tank of FIG. 1 , and illustrates a cover on the tank shell.
- FIG. 4 is a detailed plan view of a segment of the tank of FIG. 3 .
- FIG. 5 is a detailed section view of the segment of the tank of FIG. 4 .
- FIG. 6 is a detailed plan view of a segment of another embodiment of the tank of FIG. 3 .
- FIG. 7 is a detailed section view of the segment of the tank of FIG. 6 .
- FIG. 8 is a detailed plan view of a segment of another embodiment of the tank of FIG. 3 .
- FIG. 9 is a detailed section view of the segment of the tank of FIG. 8 .
- FIG. 10 is a detailed plan view of a segment of another embodiment of the tank of FIG. 3 .
- FIG. 11 is a detailed section view of the segment of the tank of FIG. 10 .
- a tank 1 is shown in FIGS. 1 - 3 .
- the tank 1 includes a shell 5 and a foundation 10 .
- the illustrated shell 5 and the foundation 10 are generally cylindrical about a centerline 3 .
- a portion of the shell 5 extends into the foundation 10 about an entire circumference of the shell 5 .
- This configuration is generally referred to as an embedded tank.
- a fluid 20 in the tank 1 exerts a fluid weight 22 in a “downward” direction substantially parallel to the centerline 3 .
- the material stored in the tank is not limited to fluids or any specific fluid, as rock, grain, salt, granulate, and fluids having a wide range of viscosities could be stored in the tank.
- the shell 5 retains the fluid 20 laterally, i.e., in a direction substantially perpendicular to the centerline 3 .
- the foundation 10 retains the fluid 20 vertically, i.e., in a direction substantially parallel to the centerline 3 and opposite of the direction of the fluid weight 22 .
- the shell 5 may be cylindrical, but the foundation 10 may be non-cylindrical (e.g., square, rectangular, oblong, irregular, and the like). Additionally, in other embodiments, the shell 5 may also be non-cylindrical.
- the shell 5 is formed from steel, although a person of skill in the art will appreciate that the shell 5 can additionally or alternatively be formed from other materials.
- the shell 5 is open such that the fluid 20 in the tank 1 is exposed to open air.
- the shell 5 includes a shell covering 30 so that the fluid 20 in the tank 1 is not exposed to open air.
- the foundation 10 sits on or is partially embedded into the ground 15 . While the foundation 10 illustrated in FIGS. 1 and 2 is a slab 12 with a ring footing 13 , the foundation can alternatively include only the slab 12 , i.e., without the ring footing 13 .
- the foundation 10 is formed from concrete, although a person of skill in the art will appreciate that the foundation 10 can additionally or alternatively be formed from other materials. In general, the tank 1 shown in FIGS. 1 - 3 thus results in a steel shell with a concrete floor.
- annulus 25 is provided around the portion of the shell 5 that is embedded into the foundation 10 .
- the annulus 25 is fixed to the shell 5 .
- the annulus 25 is welded to the shell 5 .
- the annulus 25 is fixed to the shell 5 by rivets or other suitable mechanical fasteners.
- the annulus 25 is integrally formed as a single piece with the shell 5 .
- the annulus 25 functions such that the fluid (or material) weight 22 , which increases with increasing fluid (or material) depth 35 , aids in reducing harm to the tank 1 caused by seismic uplift.
- the annulus 25 has a dramatic impact on the tank's 1 ability to resist seismic uplift. This, in turn, allows embedded concrete tanks to be used in a vastly larger number of applications and still comply with ASCE7 requirements.
- the illustrated annulus 25 includes a vertical arm 40 and a lateral arm 45 connected by a rolled angle.
- the vertical arm 40 extends around an interior wall of the shell 5 and is substantially parallel to the shell 5 along the centerline 3 (not shown in the detailed views of FIG. 4 or 5 , but is shown in, for example, FIG. 1 ).
- the vertical arm 40 is connected to the interior wall of the shell 5 .
- the lateral arm 45 extends from the vertical arm 40 toward the centerline 3 .
- the angle between the vertical arm 40 and the lateral arm 45 is about 90 degrees (i.e., about a right angle), although other angles are contemplated. Together, the vertical arm 40 and the lateral arm 45 extend around the entire interior of the circumference of the shell 5 .
- the annulus 25 (including the vertical and lateral arms 40 , 45 ) extends around less than the entire interior of the circumference of the shell 5 .
- the annulus 25 may only extend along two, four, eight, twenty, or 100 sectors along the interior of the circumference of the shell 5 .
- the pressure from the fluid weight 22 acts on the lateral arm 45 , which, via the vertical arm's 40 connection to the shell 5 , acts to better retain the shell 5 within the foundation 10 .
- the annulus 25 has a dramatic impact on the tank's 1 ability to resist seismic uplift. Because the lateral arm 45 extends toward the centerline 3 and is under the fluid weight 22 , better resistance to seismic uplift is provided than even, for example, if the lateral arm 45 were to extend from the shell 5 away from the centerline 3 .
- the vertical arm 40 and lateral arm 45 shown in FIG. 5 have, in vertical cross section, a longest dimension that is equal or is substantially equal (i.e., the lengths are within 5%, or in other embodiments 1%, of one another). Stated otherwise, the length that the vertical arm 40 extends up the shell 5 is similar to the length that the lateral arm 45 extends away from the shell 5 . However, other embodiments are contemplated. For example, in the embodiment shown in FIG. 11 , the annulus 25 , in vertical cross section, has a lateral arm 45 with a longest dimension that is much longer than the longest dimension of the vertical arm 40 . Other relative lengths of the vertical and lateral arms 40 , 45 are contemplated.
- the lateral arm 45 extends all the way across the bottom of the shell 5 to the opposing side of the shell 5 . However, in other embodiments such as that shown in FIG. 5 , the lateral arm 45 does not extend all the way across the bottom of the shell 5 . In some embodiments, the lateral arm 45 extends about 10% of an entire distance across the bottom of the shell 5 . In other embodiments, the lateral arm 45 extends less than 10% of the entire distance across the bottom of the shell 5 .
- the illustrated annulus 25 is similar to that shown in FIGS. 4 and 5 , but the annulus 25 additionally includes an annular plate 50 .
- the annular plate 50 extends around the inner circumference of the shell 5 or in segments extending around portions of the inner circumference of the shell 5 .
- the annular plate 50 is embedded into the foundation 10 .
- the annular plate 50 in vertical cross section, is generally parallel to the lateral arm 45 , but extends further toward the centerline 3 of the tank 1 than the lateral arm 45 .
- the annular plate 50 is welded or mechanically fastened (i.e., via bolts or rivets) to the lateral arm 45 .
- the annular plate 50 and the lateral arm 45 are integrally formed such that the annular plate 50 , the vertical arm 40 , and the lateral arm 45 are a single piece.
- the annular plate 50 is formed from steel, or alternatively, similar materials from which the vertical and lateral arms 40 , 45 can be formed.
- the annular plate 50 provides a greater area for the fluid weight 22 to act on the shell 5 than the lateral arm 45 alone. As a result, the addition of the annular plate 50 to the annulus 25 provides even better resistance to seismic uplift than, for example, the annulus 25 as shown in FIG. 5 .
- annulus 25 ′ is provided on an outside circumference of the shell 5 .
- the illustrated annulus 25 ′ includes a vertical arm 40 ′ and a lateral arm 45 ′ connected by a rolled angle.
- the vertical arm 40 ′ extends around the exterior wall of the shell 5 and is substantially parallel to the shell 5 along the centerline 3 (not shown in the detailed views of FIGS. 8 and 9 , but is shown in, for example, FIG. 1 ).
- the vertical arm 40 ′ is connected to the exterior wall of the shell 5 .
- the lateral arm 45 ′ extends from the vertical arm 40 ′ away from the centerline 3 .
- the angle between the vertical arm 40 ′ and the lateral arm 45 ′ is about 90 degrees, although other angles are contemplated.
- the annulus 25 also includes the annular plate 50 to extend back past the shell 5 toward the centerline 3 and under the fluid weight 22 .
- the annular plate 50 is welded or mechanically fastened (i.e., via bolts or rivets) below, relative to the fluid weight 22 , the lateral arm 45 ′.
- the annular plate 50 and the lateral arm 45 ′ are integrally formed. Similar to the embodiments shown in FIGS. 6 and 7 , the portion of the shell 5 and the annulus 25 ′ including the annular plate 50 are all embedded within the foundation 10 .
- the pressure from the fluid weight 22 acts on the annular plate 50 , which in turn acts on the lateral arm 45 ′.
- the lateral arm 45 ′ via its connection to the vertical arm 40 ′, acts to better retain the shell 5 within the foundation 10 .
- the annulus 25 ′ has a dramatic impact on the tank's 1 ability to resist seismic uplift.
- both the annulus 25 and the annulus 25 ′ are provided.
- the annulus 25 ′ is connected to an outside circumference of the shell 5 and is embedded into the foundation 10 .
- the annulus 25 is connected to an inside circumference of the shell 5 and is not embedded into the foundation 10 .
- the lateral arm shown in FIG. 11 has a longest dimension that is much longer than the longest dimension of the vertical arm 40 such that the lateral arm 45 extends under more of the fluid weight 22 than, for example, the embodiment shown in FIG. 5 .
- the length that the lateral arm 45 extends under the fluid weight 22 is similar to the length that the annular plate 50 extends under the fluid weight 22 in the embodiment of FIG. 7 , and thus provides similar functionality.
- the embodiment of the annulus 25 shown in FIG. 11 combines the functionality of the lateral arm 45 and the annular plate 50 into a single structure.
- the lateral arm 45 is welded or mechanically fastened (i.e., via bolts, rivets, and/or concrete anchors) to an upper surface 55 of the slab 12 , and is not embedded in the foundation 10 . Because the annulus 25 is not embedded into the foundation 10 , the lateral arm 45 is sealingly (e.g., a water-tight seal) connected to the upper surface 55 of the slab 12 . The sealed connection inhibits fluid 20 buildup underneath the lateral arm 45 and the annular plate 50 . As a result, the fluid weight 22 acts on the lateral arm 45 , which is connected to the shell 5 via the vertical arm 40 , to have a dramatic impact on the tank's 1 ability to resist seismic uplift. If the seal were broken, and fluid were to travel under the lateral arm 45 , the annulus 25 may be much less effective at increasing resistance to seismic uplift.
- annulus 25 ′ is embedded into the foundation 10 , the annulus 25 ′ is positioned below, relative to a bottom rim of the shell 5 , the non-embedded annulus 25 .
- One advantage to the annulus 25 as shown in FIGS. 10 and 11 is that, since the annulus 25 is not embedded into the foundation, the annulus 25 can be added or replaced with less of an impact to the foundation 10 . This is especially useful in tanks 1 that, for example, were initially installed with only an annulus 25 ′, but now require the additional structural support provided by the annulus 25 .
Abstract
A tank for retaining material includes a foundation, a shell, and an annulus. The foundation supports the material. The shell is partially embedded into the foundation and is configured to retain the material in a material storage area enclosed by the shell. The annulus is connected to the shell. A portion of the annulus extends beneath the material storage area.
Description
- This application claims priority to U.S. Provisional Application No. 63/246,440, filed Sep. 21, 2021, the entire contents of which are incorporated by reference herein.
- The present disclosure relates to storage tanks, and particularly to above ground storage tanks which are used to store fluids of all types.
- In the United States, minimum design loads and various other criteria for buildings and other structures are set forth in ASCE7. ASCE7 describes the means for determining loads for soil, flood, tsunami, snow, rain, atmospheric ice, earthquake, and wind, and their combinations for general structural design.
- For example, these requirements include a seismic uplift requirement. Seismic uplift, in general, refers to upward vertical loads on a structure produced by lateral seismic accelerations that result in lateral loads applied to the structure above its base foundation due to structure inertia. These lateral loads attempt to overturn the structure resulting in downward loads on one side of the structure and uplift loads on the other. The uplift load produced by overturning is seismic uplift. Additional seismic uplift results from vertical seismic accelerations that result in vertical loads due to structure inertia. Current provisions in ASCE7 limit the seismic uplift to a level not to exceed the counteracting weight of materials above the foundation.
- In one aspect, a tank for retaining material is provided. The tank includes a foundation for supporting the material, a shell partially embedded into the foundation, and an annulus connected to the shell. The shell is configured to retain the material in a material storage area enclosed by the shell. A portion of the annulus extends beneath the material storage area.
- In another aspect, when viewed in vertical cross-section, the lateral arm extends at about a right angle from the vertical arm.
- In yet another aspect, the annulus includes an annular plate, the annular plate is embedded into the foundation, and the annular plate abuts the lateral arm and is positioned between the lateral arm and the material storage area.
- In yet another aspect, the annular plate has an outermost diameter that abuts an innermost diameter of the vertical arm.
- In yet another aspect, the shell is generally cylindrical, a curved wall of the shell extends vertically away from the foundation, and, when viewed in vertical cross section, the lateral arm extends from the shell in a direction away from a centerline of the generally cylindrical shell.
- In yet another aspect, the annulus further includes an annular plate, the annular plate is connected to and abuts the lateral arm, and, when viewed in vertical cross section, the annular plate extends from the lateral arm, past the shell, and back towards the centerline.
- In yet another aspect, the annular plate is formed integrally with the lateral arm.
- In yet another aspect, the annulus is a first annulus, and when viewed in vertical cross-section, the first annulus includes a first vertical arm and a first lateral arm. The first vertical arm extends along and is connected to the shell and the first lateral arm extends away from the shell. The tank also includes a second annulus, and, when viewed in vertical cross-section, the second annulus includes a second vertical arm and a second lateral arm. The second vertical arm extends along and is connected to the shell, and the second lateral arm extends in a direction away from the shell that is different than the first lateral arm.
- In yet another aspect, the shell is generally cylindrical, a curved wall of the shell extends vertically away from the foundation, and, when viewed in vertical cross section, the first lateral arm extends beneath the material storage area and the second lateral arm extends in a direction away from a centerline of the generally cylindrical shell.
- In yet another aspect, when viewed in vertical cross-section, the first lateral arm has a longest dimension that is longer than a longest dimension of the first lateral arm.
- In yet another aspect, the annulus is entirely embedded within the foundation, and an interface between the annulus and the shell is entirely embedded within the foundation.
- In yet another aspect, a method of installing a tank includes connecting the annulus to the shell and embedding the annulus and a bottom portion of the shell into the foundation.
- In yet another aspect, a tank assembly includes a shell enclosing an interior volume and an annulus. When viewed in vertical cross-section, the annulus includes a vertical arm and a lateral arm. The vertical arm extends along the shell, the lateral arm extends away from the shell, and the vertical arm is connected to the shell.
- In yet another aspect, a method of installing a tank assembly includes connecting the annulus to the shell and embedding the annulus and a bottom portion of the shell into a foundation such that the shell forms sides of an area configured to retain material and the foundation forms a bottom of the area configured to retain material.
- In yet another aspect, an annular plate is mechanically connected to the lateral arm and the annular plate extends further than the lateral arm toward the centerline of the shell.
- In yet another aspect, the foundation comprises concrete.
- In yet another aspect, the foundation is embedded into the ground.
- Other aspects will become apparent by consideration of the detailed description and accompanying drawings.
-
FIG. 1 is an isometric, section view of a tank. -
FIG. 2 is another section view of the tank ofFIG. 1 . -
FIG. 3 is top plan view of the tank ofFIG. 1 , and illustrates a cover on the tank shell. -
FIG. 4 is a detailed plan view of a segment of the tank ofFIG. 3 . -
FIG. 5 is a detailed section view of the segment of the tank ofFIG. 4 . -
FIG. 6 is a detailed plan view of a segment of another embodiment of the tank ofFIG. 3 . -
FIG. 7 is a detailed section view of the segment of the tank ofFIG. 6 . -
FIG. 8 is a detailed plan view of a segment of another embodiment of the tank ofFIG. 3 . -
FIG. 9 is a detailed section view of the segment of the tank ofFIG. 8 . -
FIG. 10 is a detailed plan view of a segment of another embodiment of the tank ofFIG. 3 . -
FIG. 11 is a detailed section view of the segment of the tank ofFIG. 10 . - Before any embodiments are explained in detail, it is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Use of “including” and “comprising” and variations thereof as used herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Use of “consisting of” and variations thereof as used herein is meant to encompass only the items listed thereafter and equivalents thereof. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings.
- A
tank 1 is shown inFIGS. 1-3 . Thetank 1 includes ashell 5 and afoundation 10. The illustratedshell 5 and thefoundation 10 are generally cylindrical about a centerline 3. A portion of theshell 5 extends into thefoundation 10 about an entire circumference of theshell 5. This configuration is generally referred to as an embedded tank. Afluid 20 in thetank 1 exerts afluid weight 22 in a “downward” direction substantially parallel to the centerline 3. The material stored in the tank is not limited to fluids or any specific fluid, as rock, grain, salt, granulate, and fluids having a wide range of viscosities could be stored in the tank. Theshell 5 retains the fluid 20 laterally, i.e., in a direction substantially perpendicular to the centerline 3. Thefoundation 10 retains the fluid 20 vertically, i.e., in a direction substantially parallel to the centerline 3 and opposite of the direction of thefluid weight 22. In some embodiments, theshell 5 may be cylindrical, but thefoundation 10 may be non-cylindrical (e.g., square, rectangular, oblong, irregular, and the like). Additionally, in other embodiments, theshell 5 may also be non-cylindrical. - The
shell 5 is formed from steel, although a person of skill in the art will appreciate that theshell 5 can additionally or alternatively be formed from other materials. In some embodiments, for example as shown inFIG. 1 , theshell 5 is open such that the fluid 20 in thetank 1 is exposed to open air. In other embodiments, for example as shown inFIG. 3 , theshell 5 includes a shell covering 30 so that the fluid 20 in thetank 1 is not exposed to open air. - The
foundation 10 sits on or is partially embedded into theground 15. While thefoundation 10 illustrated inFIGS. 1 and 2 is aslab 12 with aring footing 13, the foundation can alternatively include only theslab 12, i.e., without thering footing 13. Thefoundation 10 is formed from concrete, although a person of skill in the art will appreciate that thefoundation 10 can additionally or alternatively be formed from other materials. In general, thetank 1 shown inFIGS. 1-3 thus results in a steel shell with a concrete floor. - An
annulus 25 is provided around the portion of theshell 5 that is embedded into thefoundation 10. Theannulus 25 is fixed to theshell 5. In some embodiments, theannulus 25 is welded to theshell 5. In other embodiments, theannulus 25 is fixed to theshell 5 by rivets or other suitable mechanical fasteners. In still other embodiments, theannulus 25 is integrally formed as a single piece with theshell 5. Theannulus 25 functions such that the fluid (or material)weight 22, which increases with increasing fluid (or material)depth 35, aids in reducing harm to thetank 1 caused by seismic uplift. As a result, theannulus 25 has a dramatic impact on the tank's 1 ability to resist seismic uplift. This, in turn, allows embedded concrete tanks to be used in a vastly larger number of applications and still comply with ASCE7 requirements. - Referring now to
FIGS. 4 and 5 , the illustratedannulus 25 includes avertical arm 40 and alateral arm 45 connected by a rolled angle. Thevertical arm 40 extends around an interior wall of theshell 5 and is substantially parallel to theshell 5 along the centerline 3 (not shown in the detailed views ofFIG. 4 or 5 , but is shown in, for example,FIG. 1 ). Thevertical arm 40 is connected to the interior wall of theshell 5. Thelateral arm 45 extends from thevertical arm 40 toward the centerline 3. The angle between thevertical arm 40 and thelateral arm 45 is about 90 degrees (i.e., about a right angle), although other angles are contemplated. Together, thevertical arm 40 and thelateral arm 45 extend around the entire interior of the circumference of theshell 5. In other embodiments, the annulus 25 (including the vertical andlateral arms 40, 45) extends around less than the entire interior of the circumference of theshell 5. For example, theannulus 25 may only extend along two, four, eight, twenty, or 100 sectors along the interior of the circumference of theshell 5. The pressure from thefluid weight 22 acts on thelateral arm 45, which, via the vertical arm's 40 connection to theshell 5, acts to better retain theshell 5 within thefoundation 10. As a result, theannulus 25 has a dramatic impact on the tank's 1 ability to resist seismic uplift. Because thelateral arm 45 extends toward the centerline 3 and is under thefluid weight 22, better resistance to seismic uplift is provided than even, for example, if thelateral arm 45 were to extend from theshell 5 away from the centerline 3. - The
vertical arm 40 andlateral arm 45 shown inFIG. 5 have, in vertical cross section, a longest dimension that is equal or is substantially equal (i.e., the lengths are within 5%, or inother embodiments 1%, of one another). Stated otherwise, the length that thevertical arm 40 extends up theshell 5 is similar to the length that thelateral arm 45 extends away from theshell 5. However, other embodiments are contemplated. For example, in the embodiment shown inFIG. 11 , theannulus 25, in vertical cross section, has alateral arm 45 with a longest dimension that is much longer than the longest dimension of thevertical arm 40. Other relative lengths of the vertical andlateral arms lateral arm 45 extends all the way across the bottom of theshell 5 to the opposing side of theshell 5. However, in other embodiments such as that shown inFIG. 5 , thelateral arm 45 does not extend all the way across the bottom of theshell 5. In some embodiments, thelateral arm 45 extends about 10% of an entire distance across the bottom of theshell 5. In other embodiments, thelateral arm 45 extends less than 10% of the entire distance across the bottom of theshell 5. - Referring now to
FIGS. 6 and 7 , the illustratedannulus 25 is similar to that shown inFIGS. 4 and 5 , but theannulus 25 additionally includes anannular plate 50. Theannular plate 50 extends around the inner circumference of theshell 5 or in segments extending around portions of the inner circumference of theshell 5. Theannular plate 50 is embedded into thefoundation 10. Theannular plate 50, in vertical cross section, is generally parallel to thelateral arm 45, but extends further toward the centerline 3 of thetank 1 than thelateral arm 45. Theannular plate 50 is welded or mechanically fastened (i.e., via bolts or rivets) to thelateral arm 45. In some embodiments, theannular plate 50 and thelateral arm 45 are integrally formed such that theannular plate 50, thevertical arm 40, and thelateral arm 45 are a single piece. Theannular plate 50 is formed from steel, or alternatively, similar materials from which the vertical andlateral arms annular plate 50 provides a greater area for thefluid weight 22 to act on theshell 5 than thelateral arm 45 alone. As a result, the addition of theannular plate 50 to theannulus 25 provides even better resistance to seismic uplift than, for example, theannulus 25 as shown inFIG. 5 . - Referring now to
FIGS. 8 and 9 , anannulus 25′ is provided on an outside circumference of theshell 5. The illustratedannulus 25′ includes avertical arm 40′ and alateral arm 45′ connected by a rolled angle. Thevertical arm 40′ extends around the exterior wall of theshell 5 and is substantially parallel to theshell 5 along the centerline 3 (not shown in the detailed views ofFIGS. 8 and 9 , but is shown in, for example,FIG. 1 ). Thevertical arm 40′ is connected to the exterior wall of theshell 5. Thelateral arm 45′ extends from thevertical arm 40′ away from the centerline 3. The angle between thevertical arm 40′ and thelateral arm 45′ is about 90 degrees, although other angles are contemplated. - Since the
lateral arm 45′ does not extend under thefluid weight 22, theannulus 25 also includes theannular plate 50 to extend back past theshell 5 toward the centerline 3 and under thefluid weight 22. Theannular plate 50 is welded or mechanically fastened (i.e., via bolts or rivets) below, relative to thefluid weight 22, thelateral arm 45′. In other embodiments, theannular plate 50 and thelateral arm 45′ are integrally formed. Similar to the embodiments shown inFIGS. 6 and 7 , the portion of theshell 5 and theannulus 25′ including theannular plate 50 are all embedded within thefoundation 10. The pressure from thefluid weight 22 acts on theannular plate 50, which in turn acts on thelateral arm 45′. Thelateral arm 45′, via its connection to thevertical arm 40′, acts to better retain theshell 5 within thefoundation 10. As a result, theannulus 25′ has a dramatic impact on the tank's 1 ability to resist seismic uplift. - Referring now to
FIGS. 10 and 11 , both theannulus 25 and theannulus 25′ are provided. Theannulus 25′ is connected to an outside circumference of theshell 5 and is embedded into thefoundation 10. Theannulus 25 is connected to an inside circumference of theshell 5 and is not embedded into thefoundation 10. The lateral arm shown inFIG. 11 has a longest dimension that is much longer than the longest dimension of thevertical arm 40 such that thelateral arm 45 extends under more of thefluid weight 22 than, for example, the embodiment shown inFIG. 5 . As shown inFIG. 11 , the length that thelateral arm 45 extends under thefluid weight 22 is similar to the length that theannular plate 50 extends under thefluid weight 22 in the embodiment ofFIG. 7 , and thus provides similar functionality. As a result, the embodiment of theannulus 25 shown inFIG. 11 combines the functionality of thelateral arm 45 and theannular plate 50 into a single structure. - The
lateral arm 45 is welded or mechanically fastened (i.e., via bolts, rivets, and/or concrete anchors) to anupper surface 55 of theslab 12, and is not embedded in thefoundation 10. Because theannulus 25 is not embedded into thefoundation 10, thelateral arm 45 is sealingly (e.g., a water-tight seal) connected to theupper surface 55 of theslab 12. The sealed connection inhibits fluid 20 buildup underneath thelateral arm 45 and theannular plate 50. As a result, thefluid weight 22 acts on thelateral arm 45, which is connected to theshell 5 via thevertical arm 40, to have a dramatic impact on the tank's 1 ability to resist seismic uplift. If the seal were broken, and fluid were to travel under thelateral arm 45, theannulus 25 may be much less effective at increasing resistance to seismic uplift. - Since the
annulus 25′ is embedded into thefoundation 10, theannulus 25′ is positioned below, relative to a bottom rim of theshell 5, thenon-embedded annulus 25. One advantage to theannulus 25 as shown inFIGS. 10 and 11 is that, since theannulus 25 is not embedded into the foundation, theannulus 25 can be added or replaced with less of an impact to thefoundation 10. This is especially useful intanks 1 that, for example, were initially installed with only anannulus 25′, but now require the additional structural support provided by theannulus 25. - Although aspects have been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects as described.
Claims (20)
1. A tank for retaining material, the tank comprising:
a foundation for supporting the material;
a shell partially embedded into the foundation, the shell configured to retain the material in a material storage area enclosed by the shell; and
an annulus connected to the shell,
wherein a portion of the annulus extends beneath the material storage area.
2. The tank of claim 1 , wherein the annulus is embedded into the foundation.
3. The tank of claim 1 , wherein, when viewed in vertical cross-section, the annulus includes a vertical arm and a lateral arm,
wherein the vertical arm extends along the shell,
wherein the lateral arm extends away from the shell, and
wherein the vertical arm is connected to the shell.
4. The tank of claim 3 , wherein the lateral arm extends beneath the material storage area.
5. The tank of claim 3 , wherein when viewed in vertical cross-section, the lateral arm extends at about a right angle from the vertical arm.
6. The tank of claim 3 , wherein the annulus further includes an annular plate,
wherein the annular plate is embedded into the foundation, and
wherein the annular plate abuts the lateral arm and is positioned between the lateral arm and the material storage area.
7. The tank of claim 6 , wherein the annular plate has an outermost diameter that abuts an innermost diameter of the vertical arm.
8. The tank of claim 3 , wherein the shell is generally cylindrical,
wherein a curved wall of the shell extends vertically away from the foundation, and
wherein, when viewed in vertical cross section, the lateral arm extends from the shell in a direction away from a centerline of the generally cylindrical shell.
9. The tank of claim 8 , wherein the annulus further includes an annular plate,
wherein the annular plate is connected to and abuts the lateral arm, and
wherein, when viewed in vertical cross section, the annular plate extends from the lateral arm, past the shell, and back towards the centerline.
10. The tank of claim 9 , wherein the annular plate is formed integrally with the lateral arm.
11. The tank of claim 1 , wherein the annulus is a first annulus,
wherein, when viewed in vertical cross-section, the first annulus includes a first vertical arm and a first lateral arm, wherein the first vertical arm extends along and is connected to the shell,
wherein the first lateral arm extends away from the shell,
wherein the tank further comprises a second annulus,
wherein, when viewed in vertical cross-section, the second annulus includes a second vertical arm and a second lateral arm, wherein the second vertical arm extends along and is connected to the shell,
wherein the second lateral arm extends in a direction away from the shell that is different than the first lateral arm.
12. The tank of claim 11 , wherein the shell is generally cylindrical,
wherein a curved wall of the shell extends vertically away from the foundation, and
wherein, when viewed in vertical cross section, the first lateral arm extends beneath the material storage area and the second lateral arm extends in a direction away from a centerline of the generally cylindrical shell.
13. The tank of claim 12 , wherein, when viewed in vertical cross-section, the first lateral arm has a longest dimension that is longer than a longest dimension of the first lateral arm.
14. The tank of claim 1 , wherein the annulus is entirely embedded within the foundation, and
wherein an interface between the annulus and the shell is entirely embedded within the foundation.
15. A method of installing the tank of claim 1 , the method comprising:
connecting the annulus to the shell; and
embedding the annulus and a bottom portion of the shell into the foundation.
16. A tank assembly comprising:
a shell enclosing an interior volume; and
an annulus,
wherein, when viewed in vertical cross-section, the annulus includes a vertical arm and a lateral arm,
wherein the vertical arm extends along the shell,
wherein the lateral arm extends away from the shell, and
wherein the vertical arm is connected to the shell.
17. The tank assembly of claim 16 , wherein the lateral arm extends beneath the interior volume, and
wherein, when viewed in vertical cross-section, the lateral arm extends at about a right angle from the vertical arm.
18. The tank assembly of claim 17 , wherein the annulus further includes an annular plate,
wherein the annular plate abuts the lateral arm, and
wherein the annular plate has an outermost diameter that abuts an innermost diameter of the vertical arm.
19. The tank assembly of claim 16 , wherein the lateral arm extends away from the interior volume of the shell, and
wherein the annulus further includes an annular plate,
wherein the annular plate is connected to and abuts the lateral arm, and
wherein, when viewed in vertical cross section, the annular plate extends along the lateral arm, past the shell, and back towards the interior volume.
20. A method of installing the tank assembly of claim 16 , the method comprising:
connecting the annulus to the shell; and
embedding the annulus and a bottom portion of the shell into a foundation such that the shell forms sides of an area configured to retain material and the foundation forms a bottom of the area configured to retain material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/945,634 US20230091069A1 (en) | 2021-09-21 | 2022-09-15 | Storage Tank with Annulus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202163246440P | 2021-09-21 | 2021-09-21 | |
US17/945,634 US20230091069A1 (en) | 2021-09-21 | 2022-09-15 | Storage Tank with Annulus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230091069A1 true US20230091069A1 (en) | 2023-03-23 |
Family
ID=85571590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/945,634 Pending US20230091069A1 (en) | 2021-09-21 | 2022-09-15 | Storage Tank with Annulus |
Country Status (1)
Country | Link |
---|---|
US (1) | US20230091069A1 (en) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1339062A (en) * | 1919-04-23 | 1920-05-04 | Raymond D Johnson | Tank and method of forming the same |
US1400251A (en) * | 1921-03-05 | 1921-12-13 | Frank J Van Cott | Silo structure and anchoring system therefor |
US1515996A (en) * | 1922-06-27 | 1924-11-18 | Andrew A Kramer | Tank construction |
US2751672A (en) * | 1953-03-05 | 1956-06-26 | Smith Corp A O | Method and apparatus for erecting helical storage vessel |
US2794242A (en) * | 1953-06-10 | 1957-06-04 | Smith Corp A O | Method and apparatus for erecting a storage vessel |
US3505769A (en) * | 1965-03-29 | 1970-04-14 | Chevron Res | Corrosion-resistant storage tank and method of forming |
GB2122677A (en) * | 1982-04-27 | 1984-01-18 | Bentall Simplex | Tank walls |
US5457919A (en) * | 1993-04-29 | 1995-10-17 | The Dow Chemical Company | Sludge clarifier bottom |
US20150345167A1 (en) * | 2013-05-20 | 2015-12-03 | Ihi Corporation | Storage tank construction method |
US20160168873A1 (en) * | 2014-12-15 | 2016-06-16 | Tank Connection, L.L.C. | Elevated water tank |
US9873950B1 (en) * | 2008-10-20 | 2018-01-23 | Louis Koszewski | Method and apparatus for cathodically protecting a storage tank |
US20190264461A1 (en) * | 2017-07-26 | 2019-08-29 | Steve Cody | Earthquake dampening platform for a ground level storage vessel |
-
2022
- 2022-09-15 US US17/945,634 patent/US20230091069A1/en active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1339062A (en) * | 1919-04-23 | 1920-05-04 | Raymond D Johnson | Tank and method of forming the same |
US1400251A (en) * | 1921-03-05 | 1921-12-13 | Frank J Van Cott | Silo structure and anchoring system therefor |
US1515996A (en) * | 1922-06-27 | 1924-11-18 | Andrew A Kramer | Tank construction |
US2751672A (en) * | 1953-03-05 | 1956-06-26 | Smith Corp A O | Method and apparatus for erecting helical storage vessel |
US2794242A (en) * | 1953-06-10 | 1957-06-04 | Smith Corp A O | Method and apparatus for erecting a storage vessel |
US3505769A (en) * | 1965-03-29 | 1970-04-14 | Chevron Res | Corrosion-resistant storage tank and method of forming |
GB2122677A (en) * | 1982-04-27 | 1984-01-18 | Bentall Simplex | Tank walls |
US5457919A (en) * | 1993-04-29 | 1995-10-17 | The Dow Chemical Company | Sludge clarifier bottom |
US9873950B1 (en) * | 2008-10-20 | 2018-01-23 | Louis Koszewski | Method and apparatus for cathodically protecting a storage tank |
US20150345167A1 (en) * | 2013-05-20 | 2015-12-03 | Ihi Corporation | Storage tank construction method |
US20160168873A1 (en) * | 2014-12-15 | 2016-06-16 | Tank Connection, L.L.C. | Elevated water tank |
US20190264461A1 (en) * | 2017-07-26 | 2019-08-29 | Steve Cody | Earthquake dampening platform for a ground level storage vessel |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4738061A (en) | Foundation system for manufactured homes | |
US5827011A (en) | Wave suppression system | |
US9476409B2 (en) | Offshore wind turbine | |
US4838737A (en) | Pier for supporting a load such as a foundation wall | |
US20230091069A1 (en) | Storage Tank with Annulus | |
JP4625987B2 (en) | Water storage device and its construction method | |
KR102120458B1 (en) | Bolt assembly type polyethylene double frame panel water storage tank with seismic design | |
JPS6131252B2 (en) | ||
US10640999B2 (en) | Earthquake dampening platform for a ground level storage vessel | |
US5108225A (en) | Elevated wall reservoir system | |
JPH0533543Y2 (en) | ||
JP2014009016A (en) | Safety measure for container | |
JP2002115280A (en) | Water storage device | |
JPS5931788Y2 (en) | offshore work platform | |
KR102278054B1 (en) | Structure to reinforce the water tank for earthquake resistance | |
JPH0212395Y2 (en) | ||
CN219386401U (en) | Built-in gravity type combined wall supporting structure | |
JP2003020098A (en) | Underground tank lifting preventive structure | |
CN216075207U (en) | Underwater oil storage tank foundation structure | |
CN219155386U (en) | Polymer cement anti-corrosion structure of tank bottom plate | |
KR102624682B1 (en) | Apparatus for preventing scour | |
JP2021038615A (en) | Floating building | |
JPS5817198Y2 (en) | Tank suspended ceiling structure | |
JPS5819920B2 (en) | Dome Yanetan Kouzou | |
JPS5832078B2 (en) | Oil diffusion prevention and buffering device in offshore storage tanks |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CST INDUSTRIES, INC., MISSOURI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RAU, DANIEL JASON;BIAN, YUEYING;REEL/FRAME:061110/0054 Effective date: 20220912 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |