CN214550749U - Fire dike of tank field - Google Patents

Abstract

The application discloses tank field fire dike belongs to oil depot construction technical field. The tank field fire dam comprises a cantilever type retaining wall body; the wall body is provided with a drainage hole and a one-way drainage channel which are communicated in the width direction of the wall body; the drainage hole is arranged above the liquid level elevation of the tank area, and the one-way drainage channel is arranged below the liquid level elevation of the tank area; the one-way drainage channel is provided with a one-way valve which only allows flow from the wall back to the wall front. The tank field fire dam that this application embodiment provided can discharge wall back groundwater, can prevent again that the oil from leaking.

Description

Fire dike of tank field

Technical Field

The application relates to the technical field of oil depot construction, in particular to a fire dike of a tank field.

Background

The tank field fire dike is one of the main safety facilities of an oil depot, and has the main function of preventing liquid from flowing out and fire from spreading when leakage accidents happen to oil tanks and other liquid dangerous goods storage tanks.

For the oil depot adopting the sinking type tank pool arrangement scheme, the fire fighting road elevation is higher than the tank pool terrace elevation on the inner side of the fire dike. Particularly for a fire road formed by high fill, due to the limitation of the land area range of a field, an anti-sliding retaining wall is generally required to be arranged at the slope toe of the embankment, and the anti-sliding retaining wall is also used as a fire dam. However, the basic requirement for a fire dam is to prevent leakage and thus prohibit opening of the dam body, while the basic requirement for a slide resistant retaining wall is that the wall body must be provided with drainage holes in order to drain the groundwater behind the wall and reduce the thrust of hydrostatic pressure against the retaining wall. There is a conflict between these two requirements.

Therefore, there is a need for a fire dam for a tank farm that can not only drain off groundwater behind walls, but also prevent oil leakage.

SUMMERY OF THE UTILITY MODEL

In view of this, this application provides a tank field fire wall, both can discharge behind the wall groundwater, can prevent again that the oil from leaking.

Specifically, the method comprises the following technical scheme:

a tank field fire dam comprises a cantilever type retaining wall body;

the wall body is provided with a drainage hole and a one-way drainage channel which are communicated in the width direction of the wall body;

the drainage hole is arranged above the liquid level elevation of the tank area, and the one-way drainage channel is arranged below the liquid level elevation of the tank area;

the one-way drainage channel is provided with a one-way valve which only allows flow from the wall back to the wall front.

Optionally, the tank field fire dam further comprises a coarse particle material reverse filtering layer, the coarse particle material reverse filtering layer is tightly attached to the outer side of the wall body, and the water inlet end of the water drainage hole behind the wall and the water inlet end of the one-way water drainage channel behind the wall are both arranged in the coarse particle material reverse filtering layer.

Optionally, a rear wall drainage blind ditch is arranged at the lower part of the coarse aggregate reverse filtering layer, and the rear wall drainage blind ditch extends along the extending direction of the wall body.

Optionally, the wall rear drainage blind ditch comprises a coarse grain layer, a drainage pipe with holes and a concrete cushion layer, the drainage pipe with holes is buried in the coarse grain layer, and the concrete cushion layer is arranged below the coarse grain layer and the drainage pipe with holes.

Optionally, the wall rear drainage blind ditch further comprises a third double-layer permeable geotextile, and the coarse particle layer is wrapped by the third double-layer permeable geotextile.

Optionally, the drainage pipe with the hole is a hard UPVC pipe, and the plurality of third openings in the drainage pipe with the hole are uniformly arranged in the circumferential direction and the axial direction.

Optionally, the water inlet end of the water drainage hole behind the wall is wrapped by a first double-layer permeable geotextile, and/or the water inlet end of the one-way drainage channel behind the wall is wrapped by a second double-layer permeable geotextile.

Optionally, a plurality of deformation joints are arranged on the wall body at intervals along the extending direction of the wall body, and a metal water stop belt is arranged in each deformation joint and is filled with a flexible joint mixture material.

Optionally, the drainage hole and the horizontal plane form a first inclination angle, wherein the water outlet end of the drainage hole (111) is lower than the water inlet end, and/or the one-way drainage channel and the horizontal plane form a second inclination angle, wherein the water outlet end of the one-way drainage channel is lower than the water inlet end.

Optionally, the first inclination angle is 3-10 degrees, and/or the second inclination angle is 3-10 degrees.

Optionally, the wall includes a body, a base, and a tenon, the body is seated on the base, the width of the base is greater than the width of the body, and the tenon protrudes downward from the lower surface of the base.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

in the tank field fire dike that this application embodiment provided, the outlet of setting on tank field liquid level elevation can allow to discharge water to the wall front from the wall, and the one-way drainage channel of setting under tank field liquid level elevation can only allow to discharge water to the wall front from the wall back, and water flows away from the drainage ditch before the wall, therefore can in time discharge wall back groundwater, simultaneously because the check function of check valve, can not discharge behind the wall through one-way drainage channel when the oil leaks. Therefore, the tank field fire dam that this application embodiment provided can discharge wall back groundwater, can prevent again that the oil from leaking.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a use scenario of a fire dam in a tank farm according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a tank farm fire dam provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a deformation joint of a tank field fire dam according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a drainage hole of a tank field fire dam according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a unidirectional drainage channel of a fire dam of a tank farm according to an embodiment of the present application.

Fig. 6 is a schematic structural view of a wall rear drainage blind ditch of a fire dam of a tank field according to an embodiment of the present application.

Fig. 7 is a schematic cross-sectional view of a perforated drain pipe of a rear wall drain blind of a fire dam of a tank field according to an embodiment of the present application.

The reference numerals in the drawings denote:

1-cantilever type retaining wall body;

11-a body;

111-weep holes;

1111-first PVC pipe;

1112-opening the first water inlet end;

1113-first double-layer permeable geotextile;

112-one-way drainage channel;

1121-water inlet pipe;

1122-water outlet pipe;

1123-one-way valve;

1124-opening a hole at the second water inlet end;

1125-second double layer permeable geotextile;

12-a base;

13-a tenon;

2-level of the terrace of the tank area;

20-tank area liquid level elevation;

21-wall top elevation;

3-the current surface;

4-fire-fighting road;

5-embankment slope;

6-a filler;

7-coarse particle material reverse filtering layer;

8-wall rear drainage blind ditch;

81-coarse particle layer;

82-drainage pipe with holes;

821-a third opening;

83-concrete cushion;

84-a third double-layer hydraulic permeable cloth;

9-soil water barrier.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Before the embodiments of the present application are described in further detail, terms of orientation such as "upper", "lower", "side", and the like in the embodiments of the present application are generally used as references to relative relationships of the orientations shown in the drawings, and are only used for the purpose of more clearly describing the structures and the relationships between the structures. When the product is placed in different postures, the orientation may be changed, for example, "up" and "down" may be interchanged.

Unless defined otherwise, all technical terms used in the examples of the present application have the same meaning as commonly understood by one of ordinary skill in the art.

In order to make the technical solutions and advantages of the present application clearer, the following will describe the embodiments of the present application in further detail with reference to the accompanying drawings.

The use scene of tank field fire dam that this application embodiment provided is shown in fig. 1, and tank field fire dam's wall body 1 is around the tank field, keeps apart tank field and external world, and tank field terrace elevation 2 is less than the facility behind the wall (also can be called the wall outside). The ground surface 3 is a plane and slope surface, and a fire road 4 is laid behind the wall. The slope surface is covered with filler 6 to form an embankment slope surface 5, and the joint of the embankment slope surface 5 and the wall body 1 is basically flush with the top surface of the wall body 1.

As shown in fig. 1, the fire dam of the tank farm provided by the embodiment of the present application includes a cantilevered retaining wall body 1.

The wall 1 is provided with a drain hole 111 and a one-way drain passage 112 penetrating in the wall width direction. The wall width direction herein refers to a direction from the rear surface of the wall to the front surface of the wall, and may also be referred to as a wall thickness direction.

The drain hole 111 is provided above the liquid level 20 of the tank field, and the one-way drain passage 112 is provided below the liquid level 20 of the tank field.

The one-way drain passage 112 is provided with a one-way valve 1123, the one-way valve 1123 allowing flow only from the rear of the wall to the front of the wall.

In the tank field fire dike that this application embodiment provided, the outlet of setting on tank field liquid level elevation can allow to discharge water to the wall front from the wall, and the one-way drainage channel of setting under tank field liquid level elevation can only allow to discharge water to the wall front from the wall back, and water flows away from the drainage ditch before the wall, therefore can in time discharge wall back groundwater, simultaneously because the check function of check valve, can not discharge behind the wall through one-way drainage channel when the oil leaks. Therefore, the tank field fire dam that this application embodiment provided can discharge wall back groundwater, can prevent again that the oil from leaking.

The structure and advantages of the tank farm breakwater provided by the embodiments of the present application are described in further detail below.

As seen in fig. 2, the wall 1 includes a body 11, a base 12, and a tenon 13, the body 11 is seated on the base 12, the base 12 has a width greater than that of the body 11, and the tenon 13 protrudes downward from the lower surface of the base 12. The cantilever retaining wall 1 is firmly positioned and is not easy to incline due to the wide base and the convex tenon. The wall body 1 can be formed by pouring reinforced concrete, the concrete can be C30 impervious concrete, the impervious grade can be P6, and the steel bars can be HRB 400. The size of the wall body can be determined by comprehensive calculation according to the gliding force of the soil body behind the wall, the soil pressure and the height of the liquid level of the designed tank area.

In order to prevent the wall from breaking due to excessive rigidity, a plurality of deformation joints 14 can be arranged on the wall 1 at intervals along the extending direction of the wall. The spacing distance between adjacent deformation joints can be 10-15 m, and the width can be 20-30 mm. Referring to fig. 3, a metal water stop 15 is disposed in each deformation joint 14 and filled with a flexible joint compound material. The metal water stop belt can be made of copper sheets or stainless steel. The flexible underfill material is typically a non-flammable material.

As can be seen from fig. 4, the drain hole 111 includes a first PVC pipe 1111, and a rear wall portion of the first PVC pipe 1111 is provided with a plurality of first water inlet end openings 1112. Also, referring to fig. 4, the water inlet end of the water escape hole 111 located behind the wall may be wrapped by a first double-layered water-permeable geotextile 1113. The first PVC pipe 1111 may be a phi 75PVC pipe, and each first water inlet end opening 1112 has a diameter of 10 mm. The first double-layer permeable geotextile 1113 can have a size of 40cm by 40 cm.

As seen in fig. 5, one-way drain passage 112 includes a water inlet pipe 1121, a water outlet pipe 1122, and a one-way valve 1123, and one-way valve 1123 is connected between water inlet pipe 1121 and water outlet pipe 1122. The portion of the inlet tube 1121 located behind the wall is provided with a plurality of second inlet end openings 1124. Referring to fig. 5, the water inlet end of the one-way drainage channel 112 located behind the wall may be wrapped by a second double-layer permeable geotextile 1125. Both water inlet tube 1121 and water outlet tube 1122 can be implemented by using phi 75PVC water inlet tubes, and the diameter of each second water inlet end opening 1124 is 10 mm. The second double layer permeable geotextile 1125 can have dimensions of 40cm by 40 cm.

For diversion, the water discharge hole 111 can form a first inclination angle with the horizontal plane, wherein the water outlet end of the water discharge hole 111 is lower than the water inlet end; the one-way drainage channel 112 may also form a second inclination angle with the horizontal plane, and the water outlet end of the one-way drainage channel 112 is lower than the water inlet end. Both the first and second inclination angles may be 3-10 degrees, preferably 5 degrees.

It should be understood that although only one drainage hole 111 and one unidirectional drainage channel 112 are shown in fig. 2, in practice, a plurality of drainage holes 111 and a plurality of unidirectional drainage channels 112 may be arranged at intervals on the wall 1, and the number is determined according to the actual drainage requirement. In addition, a drainage ditch (not shown) is provided in the front wall tank area to drain water flowing out of the drainage holes 111 and the one-way drainage channels 112.

As can be seen from fig. 2, the fire dam of the tank farm may further include a coarse particle material reverse filtering layer 7, the coarse particle material reverse filtering layer 7 is tightly attached to the outer side of the wall body 1, the water inlet end of the water outlet 111 located behind the wall is disposed in the coarse particle material reverse filtering layer 7, and the water inlet end of the one-way water drainage channel 112 located behind the wall is also disposed in the coarse particle material reverse filtering layer 7. The inverted layer (also called inverted filter bag) refers to a graded gravel layer with the grain diameter from fine to coarse, which is laid at the water inlet of a large-mouth well or an infiltration canal, along the water flow direction. The width of the coarse particle material reverse filtering layer can be 50 cm. The coarse particle material reverse filtering layer is made of a plurality of layers of sand, gravel or pebbles with different particle sizes, the particles are gradually increased along the direction of water flow, and the particles of any layer are not allowed to pass through the pores of the adjacent thicker layer. The particles in the same layer cannot move relatively. After the reverse filtering layer is arranged, the seepage water takes fine particles in the filling soil without leaving the wall when flowing out, thereby filtering the soil and draining the water.

Referring to fig. 2, a soil water barrier layer 9 is further included above the coarse particle material filtering layer 7, the lower surface of the soil water barrier layer 9 is tightly attached to the coarse particle material filtering layer 7, and the upper surface of the soil water barrier layer 9 is flush with the upper plane of the wall body 1. The earthen water barrier 9 is typically a rammed-fill clay water barrier. The soil water barrier can reduce the water penetrating into the underground behind the wall.

As can be seen from fig. 2, the lower part of the coarse aggregate inverted filter layer 7 is provided with a rear wall drainage blind ditch 8, and the rear wall drainage blind ditch 8 extends along the extending direction of the wall body 1. As can be seen from fig. 6, the wall rear drain blind ditch 8 includes a coarse-grained layer 81, a perforated drain pipe 82, and a concrete pad 83, the perforated drain pipe 82 being embedded in the coarse-grained layer 81, and the concrete pad 83 being provided below the coarse-grained layer 81 and the perforated drain pipe 82. The concrete pad 83 is typically a C30 plain concrete pad, i.e., no rebar, and has a strength rating of C30. The coarse particle layer 81 is made of coarse gravel, i.e., crushed stone.

As can be seen from fig. 6, the wall rear drainage blind ditch 8 further comprises a third double-layer permeable geotextile 84, and the coarse-grained layer 81 is wrapped by the third double-layer permeable geotextile.

The perforated drain pipe 82 is a rigid UPVC pipe. The plurality of third open holes 821 in the perforated drain pipe 82 are uniformly arranged in the circumferential direction and the axial direction. As shown in fig. 7, 8 rows of third openings 821 are formed on the circumference of the perforated drain pipe 82, and the arc angle between adjacent openings is 45 degrees.

As an example, as shown in fig. 6, the cross-sectional dimension of the blind trench may be selected to be 800mm by 600 mm. The pipe diameter of the drainage pipe with the hole is 200mm, the wall thickness is not less than 6mm, and the distance from the drainage pipe to the two sides of the blind ditch is 300 mm. The inner diameter of the third opening is 10mm, the longitudinal distance is 150mm, and the third opening are adjacently staggered, for example, arranged in a plum blossom shape. The coarse grain layer is crushed stone or gravel with the grain diameter of 5-50 mm, and the content of fine grains with the grain diameter of less than 2mm is not more than 5 percent. The thickness of the cushion layer of the C30 plain concrete cushion layer is 0.1m, the width is larger than the width of the blind ditch, and the cushion layer can be determined according to actual conditions to prevent water from further infiltrating. The water discharged from the wall rear drainage blind ditch 8 can be collected into a water collecting well to be discharged or naturally discharged from a water outlet arranged according to the site topography.

It will be understood by those skilled in the art that a water permeable geotextile, i.e. geotextile, is a textile composed of a purely water permeable geosynthetic material. Geosynthetics, which are a generic term for synthetic materials used in civil engineering, use artificially synthesized polymers (e.g., plastics, chemical fibers, synthetic rubbers, etc.) as raw materials to make various types of products, which are placed inside, on the surface of, or between various soil bodies to reinforce or protect the soil body.

The tank field fire dike provided by the embodiment of the application has the advantages of simple structure, reasonable design, convenience in construction and low cost, and under a normal working state, underground water in a soil body behind a wall back can be effectively discharged through the drainage holes, the one-way drainage channels and the drainage blind ditches behind the wall; when a leakage accident occurs in the tank area, the oil cannot leak out of the fire bank due to the non-return function of the one-way valve. The problem that both need discharge wall back groundwater, need prevent again that the oil from leaking has effectively been solved to the tank field fire dam that this application embodiment provided.

In this application, the terms "first" and "second," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the present application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (11)

1. A tank field fire dike is characterized in that the tank field fire dike comprises a cantilever type retaining wall body (1);

the wall body (1) is provided with a drainage hole (111) and a one-way drainage channel (112) which are communicated in the width direction of the wall body;

the drainage hole (111) is arranged above the liquid level (20) of the tank area, and the one-way drainage channel (112) is arranged below the liquid level (20) of the tank area;

the one-way drainage channel (112) is provided with a one-way valve (1123), the one-way valve (1123) allowing only flow from the wall back to the wall front.

2. The tank field fire dike according to claim 1, wherein the tank field fire dike further comprises a coarse aggregate inverted filter layer (7), the coarse aggregate inverted filter layer (7) is tightly attached to the outer side of the wall body (1), and the water inlet end of the water drainage hole (111) positioned behind the wall and the water inlet end of the one-way water drainage channel (112) positioned behind the wall are both arranged in the coarse aggregate inverted filter layer (7).

3. The tank field fire dike according to claim 2, characterized in that the lower part of the coarse grain material inverted filter layer (7) is provided with a rear wall drainage blind ditch (8), and the rear wall drainage blind ditch (8) extends along the extension direction of the wall body (1).

4. The tank field fire dike according to claim 3, characterized in that the wall rear drain blind ditch (8) comprises a coarse-grained layer (81), a perforated drain pipe (82) and a concrete cushion (83), the perforated drain pipe (82) being embedded in the coarse-grained layer (81), the concrete cushion (83) being cushioned below the coarse-grained layer (81) and the perforated drain pipe (82).

5. The tank field fire dike according to claim 4, characterized in that the wall back drainage blind ditch (8) further comprises a third double layer permeable geotextile (84), the third double layer permeable geotextile (84) wrapping the coarse particle layer (81).

6. The tank farm breakwater according to claim 4, characterized in that the perforated drain pipe (82) is a rigid UPVC pipe, and the plurality of third openings (821) in the perforated drain pipe (82) are uniformly arranged in the circumferential direction and the axial direction.

7. The tank farm firebank as claimed in claim 1, wherein the water inlet end of the water escape opening (111) located behind the wall is surrounded by a first double layer permeable geotextile (1113) and/or the water inlet end of the one-way water drain channel (112) located behind the wall is surrounded by a second double layer permeable geotextile (1125).

8. The tank field fire dike according to claim 1, characterized in that a plurality of deformation joints (14) are arranged on the wall body (1) at intervals along the extension direction of the wall body, and a metal water stop strip (15) is arranged in each deformation joint (14) and is filled with a flexible gap filler material.

9. The tank farm firestop according to claim 1, characterised in that the drainage apertures (111) are at a first angle of inclination to the horizontal, wherein the water outlet end of the drainage apertures (111) is lower than the water inlet end, and/or the one-way drainage channels (112) are at a second angle of inclination to the horizontal, wherein the water outlet end of the one-way drainage channels (112) is lower than the water inlet end.

10. The tank farm firestop bank of claim 9, wherein said first angle of inclination is 3-10 degrees and/or said second angle of inclination is 3-10 degrees.

11. The fire dam of a tank farm according to any one of claims 1 to 10, characterised in that the wall (1) comprises a body (11), a base (12) and a tenon (13), the body (11) being seated on the base (12), the base (12) having a width greater than the width of the body (11), the tenon (13) projecting downwardly from the lower surface of the base (12).

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