阅读说明：本技术 一种复合土工膜心墙套膜法连接结构及施工方法 (Composite geomembrane core wall sleeve membrane method connecting structure and construction method ) 是由 王永明 崔恩豪 任金明 梁现培 胡小禹 邹任芯 蔡建国 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种复合土工膜心墙套膜法连接结构及施工方法,包括坝体、混凝土趾板以及嵌设于坝体内部的复合土工膜心墙,其特征在于：所述混凝土趾板沿土工膜锚固轨迹线方向开设有趾板槽,该趾板槽内锚固有多个间隔布置的螺杆,位于所述趾板槽内的螺杆顶部依次穿入有SR找平层、“之”字型预制套膜、SR防渗盖片、扁钢盖板、弹簧垫圈以及螺帽,并在所述趾板槽内密实填充有混凝土保护层,所述预制套膜的引出部分与所述复合土工膜心墙的底部固定连接。本发明的连接结构施工方便、结构简单、型式可靠,同时通过采用SR底胶等弹性高分子材料找平、封边、螺杆预紧锚固等措施提高复合土工膜与岸边趾板连接的可靠性。(The invention discloses a composite geomembrane core wall sleeve membrane method connecting structure and a construction method, which comprises a dam body, concrete toe boards and a composite geomembrane core wall embedded in the dam body, and is characterized in that: the concrete toe board is provided with a toe board groove along the geomembrane anchoring track line direction, a plurality of screw rods arranged at intervals are anchored in the toe board groove, an SR leveling layer, a zigzag prefabricated covering film, an SR anti-seepage cover plate, a flat steel cover plate, a spring washer and a screw cap are sequentially penetrated into the top of each screw rod positioned in the toe board groove, a concrete protective layer is densely filled in the toe board groove, and the leading-out part of the prefabricated covering film is fixedly connected with the bottom of the composite geomembrane core wall. The connection structure is convenient to construct, simple in structure and reliable in type, and meanwhile, the connection reliability of the composite geomembrane and the shore toe boards is improved by adopting measures of leveling by elastic high polymer materials such as SR primer and the like, edge sealing, screw pre-tightening anchoring and the like.)

1. The utility model provides a compound geomembrane heart wall mantle embrane method connection structure, includes weir body or dam body, concrete toe board and inlays the compound geomembrane heart wall of locating inside weir body or dam body, its characterized in that: the concrete toe board is provided with a toe board groove along the geomembrane anchoring track line direction, a plurality of screw rods arranged at intervals are anchored in the toe board groove, an SR leveling layer, a zigzag prefabricated covering film, an SR anti-seepage cover plate, a flat steel cover plate, a spring washer and a screw cap are sequentially penetrated into the top of each screw rod positioned in the toe board groove, a concrete protective layer is densely filled in the toe board groove, and the leading-out part of the prefabricated covering film is fixedly connected with the bottom of the composite geomembrane core wall.

2. The composite geomembrane core-wall sleeve connecting structure according to claim 1, wherein: the flat steel cover plate is composed of a plurality of sections of flat steel, and the length of each section of flat steel cover plate is matched with the folding length of the prefabricated sheathing film.

3. The composite geomembrane core-wall sleeve connecting structure according to claim 2, wherein: holes are uniformly or non-uniformly formed in each section of flat steel cover plate, and the two ends of each section of flat steel cover plate are rounded, so that sharp corners are prevented from piercing the prefabricated sheathing.

4. The composite geomembrane core-wall sleeve connecting structure according to claim 1, wherein: and the leading-out part of the prefabricated covering film is arranged on the back water side.

5. The composite geomembrane core-wall sleeve connecting structure according to claim 1, wherein: the prefabricated mulch film is made of a smooth-faced geomembrane.

6. A construction method of a composite geomembrane core wall membrane-in-membrane connecting structure, characterized in that the zigzag-shaped prefabricated sheathing film according to claim 1 is prefabricated using a steel form as a cross line anchoring connection part with the concrete toe board, the construction method comprising the steps of:

s1, embedding of the anchoring screw: marking a line according to a designed geomembrane anchoring track line in a toe board groove, drilling screw holes arranged at intervals by using a drilling machine, filling an anchoring agent into the holes after the holes are drilled and washed, and inserting screws;

s2, anchoring and edge sealing of the prefabricated sheathing film: processing and leveling the concrete surfaces on two sides of the central line of the geomembrane anchoring track, brushing SR primer twice, laying an SR leveling layer, and brushing primer twice on the SR leveling layer; punching the prefabricated sheathing film at intervals of the screw rods, penetrating the punched prefabricated sheathing film into the screw rods, covering an SR (steel flat) anti-seepage cover plate on the prefabricated sheathing film, pressing a flat steel cover plate on the SR anti-seepage cover plate, putting a spring washer on the SR anti-seepage cover plate, and twisting a nut through a torque wrench;

s3, connecting the prefabricated sleeve film with the composite geomembrane core wall: carrying out hot wedge welding on the composite geomembrane core wall and the anchored prefabricated sleeve membrane by adopting an automatic creeping welding machine;

s4, filling and leveling toe board grooves: spraying a concrete protective layer on the top of the toe board groove, and leveling the concrete protective layer with the top surface of the concrete toe board;

s5, filling and paving of gravel cushion layers: manually trimming and flattening the sandstone cushion layer of the film-paved basal layer and forming the sandstone cushion layer, and vibrating a slope surface and a slope top by using a flat vibrator to flatten and compact the slope surface and stabilize the shape;

s6, laying of the composite geomembrane core wall: during the laying process, manual left and right folding is adopted, the laying process is relaxed as much as possible, the large-area welding is carried out by hot wedge creeping welding, the T-shaped joint reinforcing welding and individual areas can be welded by extrusion type hot welding;

s7, further compacting the fillers on two sides of the composite geomembrane core wall: and compacting the sand-stone cushion layer, the transition layer and the stone slag layer on two sides of the composite geomembrane core wall to the designed porosity by adopting a vibration device.

7. The construction method of the composite geomembrane core-wall membrane-in-sleeve connecting structure according to claim 6, characterized in that: the steel form comprises a toe board side form frame and a core wall side form frame, and two working table surfaces which are perpendicular to each other are provided for manufacturing the covering film.

8. The construction method of the composite geomembrane core-sleeve method connection structure according to claim 7, characterized in that: the toe board side steel die carrier comprises top inner camber control panel one, middle part chord member one, lower part connecting plate one, prolongs 2 at least and turns over a length in length direction, and the reentrant corner position is rounded.

9. The construction method of the composite geomembrane core-sleeve method connection structure according to claim 7, characterized in that: the core wall side steel formwork is composed of a top radian control plate II, a middle chord member II, a lower connecting plate II and a film connecting manufacturing pressing plate, the top radian control plate II, the middle chord member II, the lower connecting plate II and the film connecting manufacturing pressing plate are extended in the length direction as far as possible, the length direction is at least prolonged by 2 turning lengths, and the positions of the internal corner and the external corner are rounded.

10. The construction method of the composite geomembrane core-sleeve method connection structure according to claim 7, characterized in that: the prefabricated covering film is prepared by blanking and cutting a smooth geomembrane according to a toe board side steel mould frame and a core wall side steel mould frame, fixing the cut geomembrane material on the mould frame, and welding the toe board side geomembrane and the core wall side optical surface geomembrane into a whole along the intersecting line of two different planes by using an extrusion type plastic welding gun.

Technical Field

The invention relates to the field of hydroelectric and hydraulic engineering, in particular to a composite geomembrane core wall sleeve membrane connecting structure and a construction method.

Background

Along with the implementation of the western major development strategy in China, the height and scale of the earth-rock cofferdam are increased year by year, and due to construction convenience and economy, the cofferdam is in a core-wall type composite geomembrane seepage prevention type, and the seepage prevention type that a composite geomembrane core wall is connected to a seepage prevention wall is usually adopted. The technical difficulty of the high earth-rock cofferdam is improved along with the increase of the cofferdam scale, and in order to prevent the composite geomembrane from generating strain concentration damage at the joint of the composite geomembrane and the shore toe boards, the composite geomembrane is usually laid upwards by adopting a zigzag turning arrangement, and the folding height of each layer of the zigzag is about 1 m. The joint of the composite geomembrane and the shore toe board relates to the turning of the geomembrane in the upward and downstream directions, and simultaneously relates to the problem of coordination and transition of the fixing of two mutually perpendicular (or nearly perpendicular) planes of the core wall plane and the toe board plane of the composite geomembrane. The intersection line of the composite geomembrane core wall and the toe boards is anchored and inevitably has 'external corners' and 'internal corners' which are fixed and folded, and a lot of projects adopt a 'cutting-off' mode to fix at the turning parts of the 'external corners' and the 'internal corners', so that the integrity of a composite geomembrane seepage-proofing system is damaged and serious water leakage is caused.

Based on the situation, the invention provides a composite geomembrane core wall sleeve method connecting structure and a construction method, which can effectively solve the problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a composite geomembrane core wall sleeve membrane connecting structure and a construction method, which aim to solve the problem of connecting a layered filling weir body (or dam body)' -shaped composite geomembrane core wall and toe boards and avoid the engineering problems of water leakage at the joints of the composite geomembrane and the toe boards and the like.

In order to solve the technical problems, the invention is realized by the following technical scheme:

on one hand, the invention provides a composite geomembrane core wall sleeve membrane method connecting structure which comprises a weir body or a dam body, a concrete toe board and a composite geomembrane core wall embedded in the weir body or the dam body, wherein the concrete toe board is provided with a toe board groove along the geomembrane anchoring track line direction, a plurality of screw rods arranged at intervals are anchored in the toe board groove, an SR leveling layer, a reversed-Y-shaped prefabricated sleeve membrane, an SR anti-seepage cover plate, a flat steel cover plate, a spring washer and a nut are sequentially penetrated through the top of the screw rods positioned in the toe board groove, a concrete protective layer is densely filled in the toe board groove, and a leading-out part of the prefabricated sleeve membrane is fixedly connected with the bottom of the composite geomembrane core wall.

As a preferred technical scheme of the invention, the flat steel cover plate is composed of a plurality of sections of flat steel, and the length of each section of flat steel cover plate is adapted to the folding length of the prefabricated sheathing film.

As a preferred technical scheme of the invention, holes are uniformly or non-uniformly formed in each section of flat steel cover plate, and the two ends of each section of flat steel cover plate are rounded, so that sharp corners are prevented from piercing a prefabricated coating.

As a preferable technical scheme of the invention, the leading-out part of the prefabricated covering film is arranged on the back water side.

As a preferred technical solution of the present invention, the prefabricated geomembrane is made of a smooth geomembrane.

On the other hand, the invention also provides a construction method of the composite geomembrane core wall mantle connection structure, the steel framework is prefabricated into the prefabricated mantle in the shape like the Chinese character 'ji', and the prefabricated mantle is used as a connection part for anchoring the intersection line of the prefabricated mantle and the concrete toe board, and the construction method comprises the following steps:

s1, embedding of the anchoring screw: marking a line according to a designed geomembrane anchoring track line in a toe board groove, drilling screw holes arranged at intervals by using a drilling machine, filling an anchoring agent into the holes after the holes are drilled and washed, and inserting screws;

s2, anchoring and edge sealing of the prefabricated sheathing film: processing and leveling the concrete surfaces on two sides of the central line of the geomembrane anchoring track, brushing SR primer twice, laying an SR leveling layer, and brushing primer twice on the SR leveling layer; punching the prefabricated sheathing film at intervals of the screw rods, penetrating the punched prefabricated sheathing film into the screw rods, covering an SR (steel flat) anti-seepage cover plate on the prefabricated sheathing film, pressing a flat steel cover plate on the SR anti-seepage cover plate, putting a spring washer on the SR anti-seepage cover plate, and twisting a nut through a torque wrench;

s3, connecting the prefabricated sleeve film with the composite geomembrane core wall: carrying out hot wedge welding on the composite geomembrane core wall and the anchored prefabricated sleeve membrane by adopting an automatic creeping welding machine;

s4, filling and leveling toe board grooves: spraying a concrete protective layer on the top of the toe board groove, and leveling the concrete protective layer with the top surface of the concrete toe board;

s5, filling and paving of gravel cushion layers: manually trimming and flattening the sandstone cushion layer of the film-paved basal layer and forming the sandstone cushion layer, and vibrating a slope surface and a slope top by using a flat vibrator to flatten and compact the slope surface and stabilize the shape;

s6, laying of the composite geomembrane core wall: during the laying process, manual left and right folding is adopted, the laying process is relaxed as much as possible, the large-area welding is carried out by hot wedge creeping welding, the T-shaped joint reinforcing welding and individual areas can be welded by extrusion type hot welding;

s7, further compacting the fillers on two sides of the composite geomembrane core wall: and compacting the sand-stone cushion layer, the transition layer and the stone slag layer on two sides of the composite geomembrane core wall to the designed porosity by adopting a vibration device.

As a preferred technical scheme of the invention, the SR leveling layer and the matched primer are polymer impermeable materials, and the leveling and impermeable materials such as asphalt can play the same role.

As a preferred technical scheme of the invention, the steel formwork comprises a toe board side formwork and a core wall side formwork, and two mutually perpendicular working platforms are provided for manufacturing the covering film.

As a preferred technical scheme of the invention, the toe board side steel die frame consists of a top inner camber control plate I, a middle chord I and a lower connecting plate I, at least 2 turnover lengths are prolonged in the length direction, and the internal corner part is rounded.

As a preferred technical scheme of the invention, the core wall side steel formwork consists of a top radian control plate II, a middle chord member II, a lower connecting plate II and a film connecting manufacturing pressing plate, the top radian control plate II, the middle chord member II, the lower connecting plate II and the film connecting manufacturing pressing plate are extended in the length direction as much as possible, the length direction is at least prolonged by 2 turning lengths, and the positions of the internal corner and the external corner are rounded.

As a preferred technical scheme of the invention, the prefabricated covering membrane adopts a smooth geomembrane to perform blanking and cutting according to a toe board side steel mould frame and a core wall side steel mould frame, the cut geomembrane material is fixed on the mould frame, and the geomembrane on the side surfaces of the toe board side and the core wall side is welded into a whole along the intersecting line of two different planes by an extrusion type plastic welding gun.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the 'T' -shaped prefabricated covering film is prefabricated through the die steel framework, has the anchoring and conversion functions of two vertical planes of the composite geomembrane core wall and the toe boards, and has the 'T' -shaped steering function of upward and downstream without cutting an 'external corner' and an 'internal corner'. The difficult problems that the anchoring construction difficulty of the composite geomembrane core wall and the toe boards is large, the construction quality is poor, the requirement on the coordination treatment with the peripheral cushion layer is high and the like are fundamentally solved.

Drawings

FIG. 1 is a three-dimensional schematic of the steel form of the present invention;

FIG. 2 is a diagram showing the arrangement of steel plate shims at the toe plate of the present invention;

FIG. 3 is a cross-sectional view of the toe plate and geomembrane anchor connection of the present invention;

fig. 4 is a layout of the fill on both sides of the composite geomembrane core of the present invention.

Reference numerals: 1. a toe plate side mold frame; 2. a core wall side formwork; 3. prefabricating a covering film; 4. a concrete toe board; 5. a screw; 6. a flat steel cover plate; 7. an SR leveling layer; 8. an SR impermeable cover sheet; 9. a spring washer; 10. a nut; 11. a sandstone cushion layer; 12. a composite geomembrane core wall; 13. a concrete protective layer; 14. a transition layer; 15. a ballast layer; 1-1, controlling a first plate; 1-2, a first chord; 1-3, connecting a first plate; 2-1, a control panel II; 2-2, a chord member II; 2-3, connecting plate II; 2-4, pressing plates.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

As shown in fig. 1 to 4, the present embodiment is a composite geomembrane core wall mantle connection structure and a construction method, and is mainly suitable for high earth-rock cofferdams, earth-rock dams, embankments and the like which adopt composite geomembranes for seepage prevention in hydropower engineering.

The utility model provides a compound geomembrane heart wall mantle connection structure, includes dam body, concrete toe board 4 and inlays and locate the compound geomembrane heart wall 12 of dam body inside, the toe board groove has been seted up along geomembrane anchor trajectory line direction to concrete toe board 4, and the inherent a plurality of interval arrangement's of this toe board inslot anchor screw rod 5 is located SR screed-coat 7, "it" style of calligraphy prefabricated mantle 3, SR anti-seepage cover piece 8, band steel apron 6, spring washer 9 and nut 10 have been penetrated in proper order to screw rod 5 top in the toe board inslot, and closely knit the packing has concrete protective layer 13 in the toe board inslot, the drawn part of prefabricated mantle 3 with the bottom fixed connection of compound geomembrane heart wall 12.

The construction method of the embodiment comprises the following steps:

a. manufacturing a steel framework: the steel formwork is divided into a toe board side formwork 1 (or called a lower formwork) and a core wall side formwork 2 (or called an upper formwork), and two mutually perpendicular working platforms are provided for manufacturing the prefabricated film sleeve 3. The upper and lower die frames are made of flat steel with the thickness of 8mm and the specification of Q235B. The upper die frame is 1m high, and consists of a top inner radian (control internal corner) control plate I1-1, a middle chord member I1-2 and a lower connecting plate I1-3, wherein at least 2 turning lengths are prolonged in the length direction. The lower die set 2 is 50cm high and consists of a top radian control plate II 2-1 (controlling internal and external corners), a middle chord member II 2-2, a lower connecting plate II 2-3 and a film connecting and manufacturing pressing plate 2-4, the lower die set is 20cm wide and extends in the length direction as far as possible, and the length direction is at least prolonged by 2 turnover lengths. The steel framework is usually folded with a folding slope ratio of 1:1.6, the folding height of each layer of the zigzag shape is 1m, the internal angle is 69.88 degrees and the like as common geometric parameters, and the internal and external corner parts are rounded.

b. The manufacturing of the zigzag prefabricated covering film 3: and a smooth geomembrane with the thickness of 0.5mm which is thicker than the large-area geomembrane to be welded after the geomembrane is led out is adopted to manufacture the inverted-Y-shaped prefabricated covering membrane 3. Respectively blanking and cutting the smooth geomembrane according to the shapes of the upper die frame and the lower die frame and the side of the toe board and the side of the core wall; fixing the cut geomembrane material on a mould frame, and welding a toe board side and a core wall side belonging to two different planes together by adopting an extrusion type plastic welding gun; and testing the strength of the welding seam welded by the extrusion type plastic welding gun to ensure that the strength is not lower than that of the smooth geomembrane base metal. The manufacturing length range of the prefabricated sheathing film 3 is determined according to the size of a mold and construction convenience, and the prefabricated sheathing film can be manufactured once every 3 filling turnover layers.

c. Manufacturing the flat steel cover plate 6: manufacturing a flat steel cover plate 6 according to a designed geomembrane anchoring track line, wherein the flat steel cover plate 6 is made of flat steel, the size of the flat steel is 150mm wide and 6mm thick, and the material is Q235B; the length of each section of the flat steel cover plate 6 is matched with the folding length of the prefabricated sheathing film 3, 6 holes are uniformly formed in each section of the flat steel cover plate 6, and the hole diameter is 16 mm; the two ends of the flat steel cover plate 6 are rounded, so that the sharp corners are prevented from piercing the geomembrane.

d. Embedding of the anchoring screws 5 (preferably galvanized screws) on the toe plate: and (3) marking a line on the concrete toe board 4 according to the designed geomembrane anchoring track line, and drilling an M16 screw hole by using a DDEC-1 and other drilling machines to form a hole with the aperture of 18mm and the depth of 130 mm. After the drill hole is washed, an anchoring agent is filled in the hole, and an M16 multiplied by 190 galvanized screw rod 5 is inserted, wherein the anchoring depth is 125 mm.

e. Anchoring and edge sealing of the prefabricated sleeve film 3: the method comprises the following steps of (1) processing and leveling the concrete surface of each 20cm range on two sides of the geomembrane anchoring track central line of the concrete toe board 4, brushing SR base glue with the base width of 24cm, paving an SR leveling layer 7 with the thickness of 5mm, and brushing base glue with the base width of 24cm on the SR leveling layer 7; punching the prefabricated sheathing film 3 according to the screw pitch, wherein the aperture is 16mm, and penetrating the punched prefabricated sheathing film 3 into a screw 5; covering the SR anti-seepage cover sheet 8 on the prefabricated covering film 3, wherein the SR anti-seepage cover sheet 8 is 45cm wide and 6mm thick; the flat steel cover plate 6 is pressed on the SR anti-seepage cover plate 8, the spring washer 9 is placed on the SR anti-seepage cover plate 8, the nut 10 is screwed in through the torque wrench, and the fastening torque is 100 N.m. Wherein, SR screed-coat and supporting base glue are macromolecule impervious material, asphalt levelling, impervious material can play the same role, also belong to the protective scope of this invention.

f. And (3) merging and welding the leading-out part of the prefabricated mantle 3 with the large-area geomembrane of the cofferdam weir: the large-area welding of the weir body (or dam body) composite geomembrane core wall 12 is carried out by adopting a hot wedge type creeping welding machine, and the hot wedge type welding of the large-area composite geomembrane core wall 12 and the prefabricated mantle 3 which is anchored at two banks is carried out by adopting an automatic creeping welding machine. And (4) sticking the geotextile immediately after the connection of the geomembrane is finished at the position of the smooth membrane (membrane-cloth separation) so as to prevent the geomembrane from being damaged.

g. Spraying a concrete protective layer on the top of the toe board groove: the concrete protective layer 13 sprayed on the top of the toe board groove is 40cm thick and is sprayed in two layers. Before the concrete is sprayed, a wood template is adopted to protect the peripheral geomembrane so as to prevent the sprayed material from damaging the geomembrane.

h. Filling and laying of the sandstone bedding material: the sandstone cushion layer 11 of the film-laying basal layer is trimmed and leveled and formed manually, and the slope top are vibrated by a flat vibrator, so that the slope is level and compact, the shape is stable, and the grinding layer thickness of the sandstone cushion layer on the two sides of the composite geomembrane is 50 cm.

i. Laying of the large-area core wall composite geomembrane: the large-area composite geomembrane core wall 12 is laid on the rolled sandstone cushion layer 11, manual left and right folding is adopted in the laying process, the large-area welding is performed by hot wedge type crawling welding, and the T-shaped joint reinforcing welding and individual areas can be performed by extrusion type hot welding. The zigzag core wall of the composite geomembrane is folded once every two layers of rolled core walls, and is folded in a full length after welding.

j. And (3) further compacting the fillers on two sides of the composite geomembrane: and compacting the sand-gravel cushion layer 11, the transition layer 14 and the ballast layer 15 on two sides of the composite geomembrane core wall to the designed porosity by adopting a small-sized vibration roller, a flat vibrator, a vibration roller and the like.

The invention provides a connection structure of a composite geomembrane core wall and toe boards and a construction method, which are convenient to construct, simple in structure and reliable in type, and meanwhile, the connection reliability of the composite geomembrane and the shore toe boards is improved by adopting measures of leveling, edge sealing, screw pre-tightening anchoring and the like by elastic high polymer materials such as SR primer and the like. The problem of the harmonious transition of fixing two mutually perpendicular (or nearly perpendicular) planes of a toe board plane and a core wall plane is solved by prefabricating and coating films.

According to the description and the drawings of the invention, a composite geomembrane core-sleeve method connecting structure of the invention can be easily manufactured or used by a person skilled in the art, and can generate the positive effects recorded by the invention.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.