CN108660892A - A kind of grass planting ditch based on sponge city - Google Patents

Abstract

The present invention relates to construction of city afforestation technical fields, and disclose a kind of grass planting ditch based on sponge city, including groove, the bottom of the groove is equipped with pervious bed, and layer of sand is equipped at the top of the pervious bed, planting soil layer is equipped at the top of the layer of sand, it is equipped with coating at the top of the planting soil layer, aquifer is equipped at the top of the coating, the both sides of the groove are installed with the baffle box positioned at earth's surface, and the inside of the baffle box forms a cavity.The grass planting ditch based on sponge city, it is connected to the fixation of connecting tube by flush connection, so that the ponding in groove is flowed into from filtration hole in overflow pipe, be conducive to centralized processing and the ecological purification of municipal sewage, then drive pull rod to rise by latch so that pull rod drives fixed disc and sliding block to be moved up and down along sliding slot, be conducive to the taking-up of strainer, the effect of avoiding in long-term drainage procedure, a large amount of impurity blocking overflow pipes, reducing grass planting ditch.

Description

A kind of grass planting ditch based on sponge city

technical field

The invention relates to the technical field of urban greening construction, in particular to a grass planting ditch based on a sponge city.

Background technique

Sponge city is a new generation of urban rain and flood management concept, which means that the city has good flexibility in adapting to environmental changes and responding to natural disasters brought by rain, showing excellent water seepage, compression resistance, wear resistance, anti-skid and environmental protection. Colorful, comfortable and easy to maintain, and sound-absorbing and noise-reducing features, it creates a breathable urban landscape pavement and effectively alleviates the urban heat island effect.

Grass-planting ditch technology is a link in the construction of a sponge city. Grass-planting ditch refers to a landscape surface ditch drainage system planted with vegetation. Surface runoff passes through the grass-planting ditch at a relatively low flow rate to be retained, filtered and infiltrated by plants. Most of the suspended particles in the rainwater runoff are polluted It can effectively remove pollutants and some dissolved pollutants. Grass planting ditch can be applied to the source, pollutant transmission path and on-site treatment system in BMPs or SUDS measures. The application area includes residential areas, commercial areas and industrial areas. Grass planting ditch beside the road It can replace the traditional rainwater outlet and drainage pipe network. Since the pollutants in the grass-planting ditch are visible, the grass-planting ditch replaces the traditional underground drainage system, which fundamentally solves the problem of mixed connection and random connection of traditional rainwater and sewage pipes. Management measures, effective control and treatment of runoff transmission process and pollutants before entering the receiving water body, Zhicao ditch is an important part of BMP or SUDS and other measures are jointly operated to meet the requirements of rainwater collection and purification treatment while completing the transportation function Require.

The current grass-planting ditch technology is not perfect enough. When constructing grass-planting ditch, most of them are constructed in a common form. Often due to the inflow of surface waste, the drainage system is blocked and the effect of the sponge city is reduced. For this reason, we propose a Grass planting ditch based on sponge city.

Contents of the invention

(1) Solved technical problems

Aiming at the deficiencies of the prior art, the present invention provides a grass-planting ditch based on a sponge city, which has the advantages of preventing waste from clogging pipes, convenient drainage, and easy manual cleaning. , often due to the inflow of surface waste, the drainage system is blocked, which reduces the effect of the sponge city. During the long-term drainage process, the accumulation of impurities leads to blockage of the pipeline and affects drainage. The problem of soil layer collapse.

(2) Technical solutions

In order to achieve the above-mentioned purposes of preventing waste from clogging pipes, facilitating drainage, and facilitating manual cleaning, the present invention provides the following technical solution: a grass planting ditch based on a sponge city, including a ditch, and a permeable layer is laid on the bottom of the ditch. A sand layer is laid on the top of the permeable layer, a planting soil layer is laid on the top of the sand layer, a covering layer is laid on the top of the planting soil layer, an aquifer is laid on the top of the covering layer, and the trench The two sides of the barrier box are fixedly installed on the surface, and a cavity is formed inside the barrier box, and an absorption sponge block is placed at the bottom of the cavity, and a pressure plate is movably connected to the top of the absorption sponge block, and the pressure plate The middle part of the top is fixed with a threaded rod, the top of the threaded rod penetrates and extends to the outside of the top of the barrier box, the external thread of the threaded rod is threadedly connected with the wall of the barrier box and meshes with each other, the top of the threaded rod A rotating handle is fixedly installed, and a water reservoir is fixedly set at the left end of the groove, and a support block is fixedly installed on the inner wall of the water reservoir, and the number of the support blocks is two, and the two support blocks are about The axis of the reservoir is symmetrical, a cover plate is provided above the reservoir, the bottom end of the cover plate extends to the inside of the reservoir, and the bottom of the cover plate is movable with the tops of the two supporting blocks connected, the outer surface of the cover plate located at one end inside the reservoir is flexibly connected with the inner wall of the reservoir, the top of the cover plate is provided with through grooves, the number of the through grooves is twelve, and the twelve through grooves The through grooves are divided into two groups, and six in each group are symmetrically distributed on both sides of the cover plate. The bottom of the inner wall on the right side of the reservoir is fixedly connected with a water delivery pipe, and the other end of the water delivery pipe runs through the reservoir and the The water-permeable layer extends to the outside of the other end of the trench. The outer surface of the water delivery pipe is movably connected with the water-permeable layer. The top of the water storage layer is fixedly fitted with an overflow pipe, and the bottom end of the overflow pipe successively penetrates through the covering layer, planting soil layer, sand layer and water-permeable layer and extend to the inside of the water canopy, the outer surface of the overflow pipe is fixedly connected with the cover layer, planting soil layer, sand layer and water-permeable layer respectively, the overflow pipe The bottom end is fixedly connected with the outer wall of the water delivery pipe and fixedly communicated with the inside of the water delivery pipe.

Preferably, the covering layer, the planting soil layer, the sand layer and the permeable layer are composed of pebbles, planting soil, fine sand and gravel respectively, the diameter of the pebbles is five centimeters, the diameter of the gravel is two centimeters, and the height of the planting soil is two centimeters. ten centimeters.

Preferably, a locking plate is movably installed on the top of the overflow pipe, the middle part of the locking plate is hollow, and the top of the locking plate is fixedly connected with a connecting pipe, and the outer edge of the top of the locking plate is movable There is a screw, the bottom end of which penetrates and extends to the outside of the bottom end of the locking plate and is fixedly connected with the ground surface, and the outer surface of the screw is threadedly socketed with the locking plate.

Preferably, the top of the connecting pipe is fixedly connected with an overflow port, the middle part of the connecting pipe is fixedly fitted with a water filter pipe, and the outer surface of the water filter pipe is provided with water filter holes, and the number of the water filter holes is quite large There are four holes with a diameter of two centimeters.

Preferably, base blocks are fixedly installed on the inner wall of the overflow pipe, the number of the base blocks is two, and slide grooves are provided on the inner surfaces of the two base blocks.

Preferably, the inner movable sleeve of the chute is provided with sliders, the number of the sliders is four and divided into two groups, and a fixed circular plate is fixedly connected between the sliders of the two groups, and the two sliders A filter screen is fixedly connected between the fixed circular plates.

Preferably, a pull rod is fixedly installed on the top of the fixed circular plate, and the top end of the pull rod is fixedly connected to the bottom of the locking plate.

Preferably, both sides of the planting soil layer are fixedly installed with fixing frames located on the inner wall of the trench, and a support frame is fixedly connected between the two fixing frames.

Preferably, a drainage path on the ground surface is opened on the side of the groove, and the drainage path is located outside the barrier box.

(3) Beneficial effects

Compared with the prior art, the present invention provides a grass planting ditch based on the sponge city, which has the following beneficial effects:

1. The grass planting ditch based on the sponge city, through the fixed connection between the overflow interface and the connecting pipe, makes the accumulated water in the ditch flow into the overflow pipe from the filter hole, which is conducive to the centralized treatment and ecological purification of urban sewage, and then through The locking plate drives the pull rod to rise, so that the pull rod drives the fixed circular plate and the slider to move up and down along the chute, which is beneficial to the removal of the filter screen, avoiding a large amount of impurities from blocking the overflow pipe during the long-term drainage process and reducing the efficiency of the grass planting ditch.

2. The grass planting ditch based on the sponge city, through the rotation of the rotating handle, makes the threaded rod stretch up and down, squeezes the absorption sponge block, which is beneficial to squeeze the accumulated water in the absorption sponge block, and the accumulated water flows through the through hole To the inside of the ditch, so as to avoid the impact of urban surface waste on the grass-planting ditch, and use the role of drainage path to improve the treatment of urban sewage by the grass-planting ditch.

3. The grass-planting ditch based on the sponge city, through the fixed frame installed on the inner wall of the ditch, effectively supports the supporting frame in the planting soil layer, which is conducive to improving the overall stability of the grass-planting ditch and avoiding urban When the waterlogging is serious, too much accumulated water will cause the soil layer of the planting soil to be loose, and when it is serious, the grass planting ditch will collapse, causing great damage.

Description of drawings

Fig. 1 is a cross-sectional structure schematic diagram of the present invention;

Fig. 2 is a side sectional structural schematic diagram of the present invention;

Fig. 3 is a schematic view of the top view structure of the present invention;

Fig. 4 is the partial structure schematic diagram of planting soil layer of the present invention;

FIG. 5 is a schematic diagram of a partially enlarged structure at A in FIG. 2;

FIG. 6 is a schematic diagram of a partially enlarged structure at B in FIG. 2 .

In the figure: 1 groove, 2 permeable layer, 3 sand layer, 4 planting soil layer, 5 cover layer, 6 water storage layer, 7 barrier box, 8 absorbing sponge block, 9 pressing plate, 10 threaded rod, 11 rotating handle, 12 Reservoir, 13 support block, 14 cover plate, 15 channel, 16 water delivery pipe, 17 overflow pipe, 18 locking plate, 19 connecting pipe, 20 filter pipe, 21 filter hole, 22 overflow interface, 23 screw , 24 base blocks, 25 chutes, 26 sliders, 27 fixed circular plates, 28 filter screens, 29 pull rods, 30 fixed frames, 31 support frames, 32 drainage paths.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 1-6, a grass planting ditch based on a sponge city, including a ditch 1, the side of the ditch 1 is provided with a drainage path 32 on the surface, the drainage path 32 is located outside the barrier box 7, and the bottom of the ditch 1 A water-permeable layer 2 is laid, a sand layer 3 is laid on the top of the water-permeable layer 2, a planting soil layer 4 is laid on the top of the sand layer 3, and both sides of the planting soil layer 4 are fixedly installed with a fixing frame 30 located on the inner wall of the trench 1, A supporting frame 31 is fixedly connected between the two fixing frames 30, which is conducive to improving the overall stability of the grass-planting ditch, and avoiding that when urban waterlogging is serious, too much water will cause the planting soil layer 4 to be loose, and in severe cases, the grass-planting ditch will collapse. , causing great damage, the top of the planting soil layer 4 is laid with a cover layer 5, the cover layer 5, the planting soil layer 4, the sand layer 3 and the permeable layer 2 are respectively composed of pebbles, planting soil, fine sand and gravel, and the diameter of the pebbles The diameter of the gravel is 5 centimeters, the diameter of the gravel is 2 centimeters, the height of the planting soil is 20 centimeters, the top of the covering layer 5 is laid with an aquifer 6, and the both sides of the trench 1 are fixedly equipped with a barrier box 7 positioned at the ground surface. One side and the top of the box 7 are provided with through holes to facilitate the inflow and outflow of rainwater. A cavity is formed inside the barrier box 7, and an absorption sponge block 8 is placed on the bottom of the cavity, and the top of the absorption sponge block 8 is flexibly connected There is a pressure plate 9, and the middle part of the top of the pressure plate 9 is fixedly equipped with a threaded rod 10, the top of the threaded rod 10 penetrates and extends to the outside of the top of the barrier box 7, and the external thread of the threaded rod 10 is threadedly connected with the wall of the barrier box 7 and meshed with each other , the top of the threaded rod 10 is fixedly equipped with a rotating handle 11, through the rotation of the rotating handle 11, the threaded rod 10 is stretched up and down, and the absorption sponge block 8 is squeezed, which is beneficial to squeeze the accumulated water in the absorption sponge block 8 , the accumulated water flows to the inside of the ditch 1 through the through hole, so as to avoid the impact of urban surface waste on the grass planting ditch. The left end of the ditch 1 is fixedly fitted with a reservoir 12, and the inner wall of the reservoir 12 is fixedly installed with a support block 13. The number of support blocks 13 is two, and the two support blocks 13 are symmetrical about the axis of the reservoir 12. A cover plate 14 is provided above the reservoir 12, and the bottom end of the cover plate 14 extends to the water storage Inside the pool 12, the bottom of the cover plate 14 is movably connected with the tops of the two support blocks 13, the outer surface of the cover plate 14 located at one end inside the reservoir 12 is movably connected with the inner wall of the reservoir 12, and the top of the cover plate 14 is opened There are through grooves 15, and the number of through grooves 15 is twelve. The twelve through grooves 15 are divided into two groups, and six of each group are symmetrically distributed on both sides of the cover plate 14, and the bottom of the inner wall on the right side of the reservoir 12 is fixed. Connected with a water delivery pipe 16, the other end of the water delivery pipe 16 runs through the reservoir 12 and the permeable layer 2 in turn and extends to the outside of the other end of the trench 1, the outer surface of the water delivery pipe 16 is flexibly connected with the water permeable layer 2, and the water storage layer 6 An overflow pipe 17 is fixedly set on the top of the overflow pipe 17, and a base block 24 is fixedly installed on the inner wall of the overflow pipe 17. The number of the base blocks 24 is two, and the inner surfaces of the two base blocks 24 are provided with chute 25, and the chute 25 inner movable suits have slide block 26, and the quantity of slide block 26 is four and is divided into two groups, between two groups of slide blocks 26 Fixedly connected with a fixed circular plate 27, the top of the fixed circular plate 27 is fixedly equipped with a pull rod 29, the top of the pull rod 29 is fixedly connected with the bottom of the locking plate 18, and the locking plate 18 drives the pull rod 29 to rise, so that the pull rod 29 drives the fixed circle. The plate 27 and the slider 26 move up and down along the chute 25, which is conducive to the removal of the filter screen 28, avoiding a large amount of impurities from blocking the overflow pipe 17 during the long-term drainage process, and reducing the effect of the grass planting ditch. A filter screen 28 is fixedly connected, and a locking plate 18 is movably installed on the top of the overflow pipe 17. The middle part of the locking plate 18 is hollow, and the top of the locking plate 18 is fixedly connected with a connecting pipe 19, and the top of the connecting pipe 19 is fixed. It is connected with an overflow interface 22, and through the fixed connection between the overflow interface 22 and the connecting pipe 19, the accumulated water in the groove 1 flows into the overflow pipe 17 from the water filter hole 21, which is beneficial to the centralized treatment and ecological purification of urban sewage , the middle part of the connecting pipe 19 is fixedly fitted with a water filter pipe 20, and the outer surface of the water filter pipe 20 is provided with a water filter hole 21, the number of the water filter holes 21 is not less than four and the aperture is 2 cm, and the outer surface of the locking plate 18 top is A screw 23 is set along the movable sleeve, the bottom end of the screw 23 penetrates and extends to the outside of the bottom end of the locking plate 18 and is fixedly connected with the ground surface, the outer surface of the screw 23 is threaded with the locking plate 18, and the bottom end of the overflow pipe 17 It runs through the covering layer 5, the planting soil layer 4, the sand layer 3 and the permeable layer 2 in turn and extends to the inside of the water crown 16. The outer surface of the overflow pipe 17 is connected to the covering layer 5, the planting soil layer 4, the sand layer 3 and the permeable The layer 2 is fixedly connected, and the bottom end of the overflow pipe 17 is fixedly connected with the outer wall of the water delivery pipe 16 and is fixedly communicated with the inside of the water delivery pipe 16 .

During work, the surface waste is washed to the side of the barrier box 7 by rainwater, stopped by the barrier box 7, and the rainwater flows in from the through hole at the top of the barrier box 7, and is absorbed by the absorbent sponge block 8, and then rotates the rotary handle 11, The threaded rod 10 is threaded downward to squeeze the absorbent sponge block 8, the through hole on the side of the rainwater dynamic barrier box 7 flows into the groove, the rainwater flows through the groove 1, and flows into the reservoir 1 from the through groove 15 Part of the rainwater flows from the filter hole 21 to the overflow pipe 17, and then flows from the overflow pipe 17 to the inside of the water delivery pipe 16 for transportation. When a large amount of impurities flow into the overflow pipe 17, loosen the screw 23. Lift the locking plate 18 upwards, the pull rod 29 drives the filter screen 28 up, take out the filter screen 28, remove impurities, and then install it back to the initial position, and then it can be used normally.

To sum up, the grass planting ditch based on the sponge city, through the fixed connection between the overflow interface 22 and the connecting pipe 19, makes the accumulated water in the ditch 1 flow into the overflow pipe 17 from the filter hole 21, which is beneficial to the urban sewage. The centralized treatment and ecological purification, and then the locking plate 18 drives the pull rod 29 to rise, so that the pull rod 29 drives the fixed circular plate 27 and the slider 26 to move up and down along the chute 25, which is beneficial to the removal of the filter screen 28 and avoids the long-term drainage process. During the process, a large amount of impurities block the overflow pipe 17, which reduces the effect of the grass planting ditch; through the rotation of the rotating handle 11, the threaded rod 10 is stretched up and down, and the absorption sponge block 8 is squeezed, which is beneficial to absorbing the accumulated water in the sponge block 8 Squeeze, the accumulated water flows to the inside of the ditch 1 through the through hole, thereby avoiding the impact of urban surface waste on the grass-planting ditch, and utilizing the function of the drainage path 32, it is beneficial to improve the treatment of the grass-planting ditch to urban sewage; through the ditch The fixing frame 30 fixedly installed on the inner wall of the groove 1 can effectively support the supporting frame 31 in the planting soil layer 4, which is conducive to improving the overall stability of the grass planting ditch, and avoiding excessive water accumulation when the urban waterlogging is serious. The soil quality of the planting soil layer 4 is loose, and in severe cases, the grass planting ditch collapses, causing great damage; when the grass planting ditch is constructed, most of them are constructed in an ordinary form, and the drainage system is often blocked due to the inflow of surface waste, making the The effect of the sponge city is reduced. During the long-term drainage process, the accumulation of impurities will cause the pipeline to block and affect the drainage. When the urban waterlogging is serious, the structure of the grass planting ditch will be unstable, leading to the collapse of the soil layer.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (9)

1. a grass planting ditch based on sponge city, comprising groove (1), is characterized in that: the bottom of described groove (1) is laid with water-permeable layer (2), and the top of described water-permeable layer (2) is laid with Sand layer (3), the top of described sand layer (3) is laid with planting soil layer (4), and the top of described planting soil layer (4) is laid with cover layer (5), and the top of described cover layer (5) An aquifer (6) is laid on the top, and a barrier box (7) on the surface is fixedly installed on both sides of the trench (1), and a cavity is formed inside the barrier box (7), and the cavity An absorbent sponge block (8) is placed at the bottom of the absorbent sponge block (8), the top of the absorbent sponge block (8) is movably connected with a pressing plate (9), and the middle part of the top of the pressing plate (9) is fixedly equipped with a threaded rod (10). The top of the rod (10) penetrates and extends to the outside of the top of the barrier box (7), the external thread of the threaded rod (10) is threadedly connected with the wall of the barrier box (7) and engages with each other, and the threaded rod (10) ) is fixedly installed with a rotating handle (11), the left end of the groove (1) is fixedly fitted with a water reservoir (12), and the inner wall of the water reservoir (12) is fixedly equipped with a support block (13), The number of the support blocks (13) is two, and the two support blocks (13) are symmetrical about the axis of the reservoir (12), and a cover plate is provided above the reservoir (12) (14), the bottom end of the cover plate (14) extends to the inside of the reservoir (12), the bottom of the cover plate (14) is movably connected with the tops of the two support blocks (13), and the cover The outer surface of the plate (14) located at one end of the reservoir (12) is flexibly connected with the inner wall of the reservoir (12), and the top of the cover plate (14) is provided with a through groove (15), and the through groove ( 15) is twelve in number, and the twelve through grooves (15) are divided into two groups, and six of each group are symmetrically distributed on both sides of the cover plate (14), and on the right side of the reservoir (12) The bottom of the inner wall is fixedly connected with a water pipe (16), and the other end of the water pipe (16) runs through the reservoir (12) and the water-permeable layer (2) in sequence and extends to the outside of the other end of the groove (1). The outer surface of the water delivery pipe (16) is flexibly connected to the permeable layer (2), and the top of the water storage layer (6) is fixedly fitted with an overflow pipe (17), and the bottom end of the overflow pipe (17) is sequentially Through the cover layer (5), the planting soil layer (4), the sand layer (3) and the permeable layer (2) and extend to the inside of the water canopy (16), the outer surface of the overflow pipe (17) is respectively connected with the cover Layer (5), planting soil layer (4), sand layer (3) and permeable layer (2) are fixedly connected, and the bottom end of the overflow pipe (17) is fixedly connected with the outer wall of the water pipe (16) and is connected with the The inside of water pipe (16) is fixedly connected. 2. A kind of grass-planting ditch based on sponge city according to claim 1, is characterized in that: described covering layer (5), planting soil layer (4), sand layer (3) and water-permeable layer (2) are made of respectively It consists of pebbles, planting soil, fine sand and gravel. The diameter of the pebbles is five centimeters, the diameter of the gravel is two centimeters, and the height of the planting soil is 20 centimeters. 3. A grass planting ditch based on sponge city according to claim 1, characterized in that: a locking plate (18) is movably installed on the top of the overflow pipe (17), and the locking plate (18) The middle part is hollow, and the top of the locking plate (18) is fixedly communicated with a connecting pipe (19), and the outer edge of the top of the locking plate (18) is movable with a screw (23), and the screw (23) The bottom end penetrates and extends to the outside of the bottom end of the locking plate (18) and is fixedly connected with the ground surface, and the outer surface of the screw (23) is threadedly socketed with the locking plate (18). 4. A grass planting ditch based on a sponge city according to claim 3, characterized in that: the top of the connecting pipe (19) is fixedly connected with an overflow interface (22), and the middle part of the connecting pipe (19) The fixed sleeve is provided with a water filter pipe (20), and the outer surface of the water filter pipe (20) is provided with water filter holes (21), the number of the water filter holes (21) is not less than four and the hole diameter is 2 cm. 5. A kind of grass planting ditch based on sponge city according to claim 1, characterized in that: the inner wall of the overflow pipe (17) is fixedly equipped with base blocks (24), and the number of base blocks (24) There are two, and the inner surfaces of the two base blocks (24) are provided with slide grooves (25). 6. A kind of grass-planting ditch based on sponge city according to claim 5, is characterized in that: the inner movable sleeve of described chute (25) is provided with slide block (26), and the quantity of described slide block (26) is Four and divided into two groups, the two groups of sliders (26) are fixedly connected with fixed circular plates (27), and the two fixed circular plates (27) are fixedly connected with filter screens (28) . 7. The grass planting ditch based on sponge city according to claim 6, characterized in that: a pull rod (29) is fixedly installed on the top of the fixed circular plate (27), and the top of the pull rod (29) is connected with the lock The bottom of tight plate (18) is fixedly connected. 8. A kind of grass planting ditch based on the sponge city according to claim 1, characterized in that: both sides of the planting soil layer (4) are fixedly installed with a fixing frame (30) on the inner wall of the ditch (1) A support frame (31) is fixedly connected between the two fixed frames (30). 9. A grass planting ditch based on a sponge city according to claim 1, characterized in that: the side of the ditch (1) is provided with a drainage path (32) on the surface, and the drainage path (32) is located at The outer side of the barrier box (7).