CN108385967A - The construction method of elevator shaft integral mold plate system and elevator shaft - Google Patents

Abstract

The invention belongs to the technical field of civil construction, and provides an elevator shaft integral formwork system and a construction method for an elevator shaft, including a plurality of columns, a keel frame body limitedly connected between two adjacent columns, and a frame connected between two adjacent columns. The adjustment assembly between the two keel frames, a plurality of the keel frames and a plurality of the uprights are sequentially connected to form a closed ring frame, and the ring frame can be realized by driving the adjustment assembly The area of the enclosed area becomes larger or smaller; through the cooperation of the ring frame and the adjustment component, the demoulding and the reuse of the ring frame can be realized, which can solve the problem that the existing elevator shaft formwork is difficult to install and the construction has relatively The problem of great danger.

Description

Integral formwork system for elevator shaft and construction method for elevator shaft

technical field

The invention belongs to the technical field of civil construction, and in particular relates to an elevator shaft integral formwork system and a construction method for the elevator shaft.

Background technique

In the construction of high-rise buildings, the elevator shaft is generally narrow and the shaft depth is too large, and the quality requirements are high, which makes the installation of the elevator shaft formwork difficult. During the construction process, the construction quality and progress of the elevator shaft formwork have an important impact on the project. The elevator shaft Factors such as the verticality, flatness, and squareness of the yin and yang angles of the wall directly affect the installation quality, progress and cost of the elevator. Traditionally, modular bulk formwork is used for construction. The elevator shaft is generally narrow and the depth of the shaft is too large, and the quality requirements are high. The construction scaffolding in the elevator shaft is carried out by erecting a work platform, which further affects the scope of work in the elevator shaft. The construction makes the installation of the elevator shaft formwork difficult. . And after the construction is completed, the frames in the elevator shaft need to be dismantled one by one, and there is a greater risk in the frame removal operation.

Contents of the invention

The object of the present invention is to provide an integral formwork system for elevator shafts, aiming at solving the problems that the existing elevator shaft formworks are difficult to install and the construction is relatively dangerous.

The present invention is solved in the following way: an integral formwork system for an elevator shaft, comprising a plurality of uprights, a keel frame body limitedly connected between two adjacent uprights, and a keel frame connected between two adjacent keel frames Between the adjustment components, a plurality of the keel frames and a plurality of the uprights are sequentially connected to form a closed ring frame, and the adjustment components are used to adjust the area enclosed by the ring frame to become larger or zoom out.

Further, the adjustment assembly includes a first connecting piece connected to the inner side of the upright, a second connecting piece movably connected to the inner side of the upright, and two connecting pieces respectively connected to the two sides of the upright. The third connecting piece and the fourth connecting piece on the keel frame, the adjustment assembly also includes a screw member passing through the first connecting piece and the second connecting piece, and the second connecting piece is When the screw member moves upward, it drives the third connecting piece and the fourth connecting piece to move toward or away from each other, and drives the keel frames on both sides of the column to move toward or away from each other, so that the annular The frame shrinks or expands.

Further, a first rotating member is hinged between the first connecting member and the third connecting member, a second rotating member is hinged between the first connecting member and the fourth connecting member, and the first rotating member is hinged between the first connecting member and the fourth connecting member. A third rotating member is hinged between the second connecting member and the third connecting member, and a fourth rotating member is hinged between the second connecting member and the fourth connecting member.

Further, one end of the first rotating member is rotatably connected to the first connecting member, the other end is rotatably connected to the third connecting member, and one end of the second rotating member is rotatably connected to the first connecting member. The other end is rotatably connected to the fourth connecting member, one end of the third rotating member is rotatably connected to the second connecting member, and the other end is rotatably connected to the third connecting member. One end of the four rotating parts is rotatably connected to the second connecting part, and the other end is rotatably connected to the fourth connecting part.

Further, the keel frame includes a plurality of aluminum alloy plates spliced with each other, and the outer surface of each keel frame is also connected with an inner plastic cladding plate.

Compared with the existing technology, the overall formwork system of the elevator shaft provided by the present invention has the following technical effects: a closed ring-shaped frame is formed by sequentially connecting a plurality of columns and a plurality of keel frames, and then an elevator can be formed when the elevator is built. The support of the inner wall, while adjusting the setting of the component can drive the area enclosed by the ring frame to become larger or smaller, and then after the elevator is poured and solidified, the ring frame can be demoulded by shrinking the ring frame, and because the ring frame It is a whole, and after demoulding, it can be raised with the help of external equipment to complete the subsequent elevator pouring; this design avoids repeated installation and disassembly of the elevator shaft formwork, improves construction efficiency, and improves safety at the same time.

The present invention also provides a construction method for an elevator shaft, which is implemented by using the aforementioned integrated formwork system for the elevator shaft, and specifically includes the following steps:

S1. Pre-install the column, the keel frame and the adjustment assembly to form the ring frame;

S2. Install several wall-penetrating screw rods on the keel frame;

S3. Install the external formwork of the cylinder on the outside of the annular frame, so that the shape of the external formwork of the cylinder is the same as that of the wall of the elevator shaft, and the distance between the external formwork of the cylinder and the annular frame is is the set elevator wall thickness;

S4. Pouring foundation concrete between the outer formwork of the cylinder and the annular frame;

S5. After the concrete wall is formed, remove the outer formwork of the cylinder and the wall screw, and adjust the adjustment assembly so that the area enclosed by the annular frame is reduced, so that the annular frame is separated from the concrete wall;

S6. Hoisting the horizontal height of the annular frame and adjusting the adjustment assembly so that the enclosed area of the annular frame becomes larger;

Then steps S2-S6 are repeated until the construction of the elevator is completed.

Further, in the step S1, after the assembly of the annular frame is completed, a release agent is evenly coated on the inner plastic plate outside the keel frame.

Further, in the step S2, the wall-penetrating screw includes a sleeve and a screw member passing through the sleeve, the length of the sleeve is greater than the wall thickness of the elevator, and the wire The length of the rod is greater than the length of the sleeve.

Further, in the step S3, the outer formwork of the cylinder includes an outer plastic plate arranged parallel to the outer wall of the annular frame, and an outer plastic plate connected to the outer side of the outer plastic plate and used for fixing the outer plastic plate Fasteners, the outer plastic plate is connected to the wall screw rod.

Further, in the step S6, after hoisting the ring-shaped frame, it is leveled first, and then the adjustment assembly is adjusted so that the inner plastic-clad board on the outside of the keel frame fits on the poured molded on the inner wall of the elevator.

Compared with the existing methods, the construction method of the elevator shaft provided by the present invention has the following technical effects: by pre-assembling the ring-shaped frame and placing it in the area where the elevator shaft needs to be built, then building and installing the external formwork of the cylinder, and then pouring concrete After being solidified and formed, the demoulding process of the inner formwork is realized by adjusting the components to shrink the annular frame. Compared with the existing way of installing and removing the formwork, this process has higher construction efficiency and better construction safety; and After the demoulded ring frame is hoisted by a crane for a certain distance, the ring frame is adjusted to expand and abut against the inner wall of the elevator shaft, so that the concrete pouring process can continue, which can save formwork materials and shorten construction time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is a structural diagram of an elevator shaft integral formwork system provided by an embodiment of the present invention.

Fig. 2 is a structural diagram of an adjustment component in the overall formwork system for an elevator shaft provided by an embodiment of the present invention.

Fig. 3 is a flow chart of the construction method of the elevator shaft provided by the embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

Please refer to the accompanying drawings 1 and 2, in the embodiment of the present invention, an elevator shaft integral formwork system is provided, including a plurality of columns 10, and a keel frame that is limitedly connected between two adjacent columns 10 20 and an adjustment assembly 30 connected between two adjacent keel frames 20 . A plurality of uprights 10 are regularly connected to a bottom plate 40 , one end of the keel frame 20 is connected to the upright 10 , and the other end is connected to another upright 10 . A plurality of the keel frames 20 and a plurality of the uprights 10 are sequentially connected to form a closed ring frame, which may be a square frame, or a circular or other polygonal frame. The area enclosed by the ring frame can be enlarged or reduced by driving the adjusting assembly 30 . When the adjusting assembly 30 is driven, the keel frame body 20 and the upright column 10 are simultaneously displaced, thereby reducing or increasing the area enclosed by the entire ring-shaped frame body.

The overall formwork system of the elevator shaft designed above forms a closed ring-shaped frame by sequentially connecting a plurality of columns 10 and a plurality of keel frames 20, and then can form the support of the inner wall of the elevator when building the elevator, and at the same time adjust the setting of the components 30 The area enclosed by the ring frame can be driven to become larger or smaller, and then after the elevator is poured and solidified, the ring frame can be demoulded by reducing the size of the ring frame, and since the ring frame itself is a whole, it can be demoulded Finally, it can be raised with the help of external equipment and continue to complete the subsequent elevator pouring; this design avoids repeated installation and disassembly of the elevator shaft formwork, improves construction efficiency, and improves safety at the same time.

In addition, the setting of the keel frame 20 makes the ring frame itself have its own operating platform, thereby avoiding the process of setting up a scaffolding operating platform.

Specifically, as shown in FIGS. 1 and 2 , in the embodiment of the present invention, the adjustment assembly 30 includes a first connecting member 32 connected to the inner side of the column 10 and a first connecting member 32 movably connected to the inner side of the column 10 . The second connecting piece 33 , and the third connecting piece 33 and the fourth connecting piece 34 respectively connected to the two keel frames 20 on both sides of the column 10 . The first connecting piece 32 is preferably fixedly connected to the inner side of the column 10, and the second connecting piece 33 is limitedly connected to the inner side of the column 10, and can be connected to the inner side of the column 10 under the action of external force. The inner side moves. The adjustment assembly 30 also includes a screw member 31 passing through the first connecting member 32 and the second connecting member 33, and the first connecting member 32 and the second connecting member 33 are provided with threads that are threaded with the screw member 31. Cooperating through holes, the inner wall surface of the column 10 is also provided with a limiting groove 11, the screw member 31 is connected with a limiting member 311, and the limiting member 311 is connected in the limiting groove 11, so that the screw rod The component 31 cannot be displaced in the vertical direction when it is rotated under the action of an external force, and then when the screw component 31 is rotated, the second connecting component 33 moves up and down along the screw component 31 .

At the same time, when the screw member 31 rotates under the action of external force, the second connecting member 33 moves vertically on the screw member 31, and the second connecting member 33 drives the second connecting member 33 when moving on the screw member 31. The third connecting member 33 and the fourth connecting member 34 move toward or away from each other; when the third connecting member 33 and the fourth connecting member 34 move toward each other, the area enclosed by the entire annular frame decreases; the third connecting member 33 and the fourth connecting member 34 move toward each other; When the member 33 and the fourth connecting member 34 move away from each other, the area enclosed by the entire annular frame expands. At the same time, the third connecting piece 33 drives the keel frame 20 to move, the third connecting piece 33 drives the other keel frame 20 to move, and the adjacent two keel frame 20 moves to move. The column 10 between the two moves, thereby realizing the expansion and contraction of the entire ring-shaped frame.

Specifically, as shown in FIG. 2, in the embodiment of the present invention, a first rotating member 35 is hinged between the first connecting member 32 and the third connecting member 33, and the first connecting member 32 and the fourth connecting member A second rotating part 36 is hinged between the parts 34, a third rotating part 37 is hinged between the second connecting part 33 and the third connecting part 33, and a third rotating part 37 is hinged between the second connecting part 33 and the fourth connecting part 34. A fourth rotating member 38 is hinged. The first rotating part 35, the second rotating part 36, the third rotating part 37, and the fourth rotating part 38 are preferably arranged in a rhombus shape, so that when the screw mandrel part 31 rotates, the first rotating part 35, the second rotating part The rotating member 36, the third rotating member 37, and the fourth rotating member 38 cooperate with each other to complete the movement of the annular frame.

In the embodiment of the present invention, one end of the first rotating member 35 is rotatably connected to the first connecting member 32, the other end is rotatably connected to the third connecting member 33, and one end of the second rotating member 36 is rotatable Connected to the first connecting member 32, the other end is rotatably connected to the fourth connecting member 34, one end of the third rotating member 37 is rotatably connected to the second connecting member 33, and the other end is rotatably connected to the second connecting member 33. On the third connecting member 33 , one end of the fourth rotating member 38 is rotatably connected to the second connecting member 33 , and the other end is rotatably connected to the fourth connecting member 34 . This design can ensure the easy adjustment of the adjustment assembly 30 .

Specifically, in the embodiment of the present invention, the keel frame includes a plurality of mutually spliced aluminum alloy plates, and at the same time, an inner plastic-clad plate is connected to the outer surface of each keel frame, and the inner plastic-clad plate is attached to the keel frame body 20 , and the outer surface of the inner plastic-clad board is flush with the outer surface of the column 10 .

In this embodiment, the outer surface of the inner plastic-clad board needs to be uniformly coated with a release agent before construction, so that when the adjusting component 30 drives the ring-shaped frame to shrink, the demoulding process can be better realized.

In this embodiment, the aluminum alloy formwork on the keel frame 20 is made of 6061-T6 aluminum alloy profile, and the chemical composition and mechanical properties of the profile should meet the requirements of national standards GB/T3190 and GB/T6892. The inner cladding board adopts PP (polypropylene) plastic mold, which has the high-quality characteristics of wooden formwork and plastic formwork, so that it is easy to separate from the concrete layer. The upright column 10 adopts stainless steel mechanical profiles, so as to ensure the overall structural strength of the ring frame.

As shown in Figure 3, the present invention also provides a construction method for an elevator shaft, which is implemented by using the aforementioned overall formwork system for the elevator shaft, and specifically includes the following steps:

S1. Pre-install the column 10, the keel frame 20 and the adjustment assembly 30 to form the ring frame;

In this step, a plurality of uprights 10 are connected to the bottom plate, preferably four here, and the four uprights 10 are arranged in a square shape, and then the teag keel frame 20 is connected to the four uprights 10 to form a closed In this process, the adjustment assembly 30 is placed between the column 10 and the keel frame 20; at the same time, the inner plastic cladding board is connected to the outside of the keel frame 20, and the inner plastic is covered Spread release agent evenly on the board.

S2. Install several wall-penetrating screw rods on the keel frame body 20;

In this step, the through-wall screw is perpendicular to the inner plastic-clad board. The purpose of setting the through-wall screw is to prevent the problem of mold expansion when the subsequent concrete solidifies. At the same time, the setting of the through-wall screw is also convenient Formwork installation and fastening.

S3. Install the outer formwork of the cylinder on the outside of the annular frame, so that the shape of the outer formwork of the cylinder is the same as the shape of the elevator and the wall of the elevator shaft, and the distance between the outer formwork of the cylinder and the annular frame is is the set elevator wall thickness;

In this step, the ring-shaped frame itself is set in the center of the area where the elevator shaft needs to be built, and then the outer formwork of the cylinder is set on the outside of the ring-shaped frame, and the outer formwork of the cylinder is directly opposite to the inner plastic-covered board, and then the two A closed annular groove is formed in the middle of them, the shape of the annular groove is set according to actual needs, and the width of the annular groove is preferably the preset elevator wall thickness.

S4. Pouring foundation concrete between the external formwork of the cylinder and the annular frame;

In this step, before the foundation concrete is poured, the reinforcement support shall be erected in advance, and before pouring, it is also necessary to confirm whether the external formwork of the cylinder is reinforced and stable, and whether there is any leakage, and at the end of pouring, use a vibrating rod to stir evenly. Do not damage the formwork, wall pipes, wall wires and other accessories related to the inner mold of the elevator shaft.

S5. After the concrete is formed, remove the external formwork of the cylinder and the wall screw, and adjust the adjustment assembly 30 so that the area enclosed by the annular frame is reduced, so that the annular frame is separated from the concrete wall;

In this step, first remove the fixing structure of the outer formwork of the cylinder, then remove the outer formwork, then take out all the screw rods through the wall, and then use a quick wrench to turn the screw member 31 on the adjustment assembly 30 to make the second connecting member 33 moves on the screw member 31, and then drives the third connecting piece 33 and the fourth connecting piece 34 to move toward each other, thereby reducing the area of the enclosed area of the annular frame, thereby making the area around the annular frame The inner plastic cladding breaks away from this cured concrete wall.

S6, hoisting the horizontal height of the annular frame and adjusting the adjustment assembly 30 so that the enclosed area of the annular frame becomes larger;

In this step, since the ring-shaped frame has been separated from the concrete wall, and the ring-shaped frame itself is still a whole, the level of the ring-shaped frame can be raised by lifting equipment, so as to continue to complete the next step. A round of pouring of the concrete walls of the elevator shaft.

Then steps S2-S6 are repeated until the construction of the elevator is completed.

The construction method of the elevator shaft designed above is to pre-assemble the ring-shaped frame and place it in the area where the elevator shaft needs to be built, then build and install the outer formwork of the cylinder, and then pour concrete, and shrink the ring by adjusting the assembly 30 after it is solidified. The demoulding process of the inner formwork is realized by using a circular frame. Compared with the existing method of installation and demoulding, this process has higher construction efficiency and better construction safety; and the demoulding annular frame is hoisted by a crane. After a certain distance, the adjustable annular frame expands and abuts against the inner wall of the elevator shaft, so that the concrete pouring process can be continued, which can save formwork materials and shorten construction time.

Specifically, in the embodiment of the present invention, in the step S1, after the assembly of the annular frame is completed, a release agent is evenly coated on the inner plastic-clad plate outside the keel frame.

In this embodiment, after the release agent is adjusted to be uniform according to the corresponding matching ratio, the release agent is brushed or sprayed onto the upper plate of the mold with a brush or sprayer, and the release agent is required to have a uniform and comprehensive coverage. In case of special circumstances (heavy rain), it is necessary to re-spray the release agent.

Specifically, in the embodiment of the present invention, in the step S2, the wall-penetrating screw includes a sleeve and a screw member 31 passing through the sleeve, the length of the sleeve is greater than the wall thickness of the elevator, and The length of the threaded rod member 31 is greater than the length of the sleeve.

In this embodiment, the diameter of the sleeve is larger than the diameter of the screw member 31, and one end of the screw member 31 passes through the outer formwork of the cylinder and is fastened, and the other end passes through the inner plastic plate and is fastened, so that The design can ensure the tightness of the connection between the outer formwork of the cylinder and the annular frame, and prevent the concrete from collapsing. At the same time, the setting of the sleeve can also prevent the concrete from expanding.

Specifically, in the embodiment of the present invention, in the step S3, the outer formwork of the cylinder includes an outer plastic plate arranged parallel to the outer wall surface of the annular frame and connected to the outer side of the outer plastic plate for fixing the outer A fastener for a plastic plate, the outer plastic plate is connected to the wall screw.

Specifically, in the embodiment of the present invention, in the step S6, after hoisting the annular frame, it is leveled first, and then the adjusting assembly 30 is adjusted so that the inner plastic cladding board on the outer side of the keel frame fits on the existing On the inner wall of the elevator formed by pouring.

Of course, the overall formwork system for elevator shafts of the present application can also be used for the construction and promotion of double shafts or multiple shafts. bodies for combined use.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. The overall formwork system of the elevator shaft is characterized in that: it includes a plurality of columns, a keel frame body limitedly connected between two adjacent columns, and an adjusting frame connected between two adjacent keel frames. Assemblies, a plurality of the keel frames and a plurality of the uprights are sequentially connected to form a closed ring frame, and the adjustment assembly is used to adjust the area enclosed by the ring frame to become larger or smaller. 2. The integrated formwork system for the elevator shaft according to claim 1, characterized in that: the adjustment assembly includes a first connecting piece connected to the inner side of the column and a second connecting piece movably connected to the inner side of the column. Two connecting pieces, and the third connecting piece and the fourth connecting piece respectively connected to the two keel frame bodies on both sides of the column, the adjustment assembly also includes passing through the first connecting piece and the The screw part of the second connecting part, when the second connecting part moves on the screw part, it drives the third connecting part and the fourth connecting part to move towards or away from each other, and drives the two sides of the column The keel frame moves toward or away from each other, thereby making the annular frame shrink or expand. 3. The integral formwork system for the elevator shaft according to claim 2, characterized in that: a first rotating member is hinged between the first connecting member and the third connecting member, and the first connecting member and the third connecting member A second rotating member is hinged between the fourth connecting member, a third rotating member is hinged between the second connecting member and the third connecting member, and a third rotating member is hinged between the second connecting member and the fourth connecting member. A fourth rotating part is hinged. 4. The integral formwork system for the elevator shaft according to claim 3, wherein one end of the first rotating member is rotatably connected to the first connecting member, and the other end is rotatably connected to the third connecting member , one end of the second rotating member is rotatably connected to the first connecting member, the other end is rotatably connected to the fourth connecting member, one end of the third rotating member is rotatably connected to the second connecting member, The other end is rotatably connected to the third connecting member, one end of the fourth rotating member is rotatably connected to the second connecting member, and the other end is rotatably connected to the fourth connecting member. 5. The overall formwork system for an elevator shaft according to any one of claims 1-4, wherein the keel frame comprises a plurality of aluminum alloy plates spliced together, and each of the keel frame outer surfaces is also connected with Plastic panels inside. 6. The construction method of the elevator shaft is characterized in that: it adopts the integral formwork system of the elevator shaft as claimed in any one of claims 1-5 to implement, specifically comprising the following steps: S1. Pre-install the column, the keel frame and the adjustment assembly to form the ring frame; S2. Install several wall-penetrating screw rods on the keel frame; S3. Install the external formwork of the cylinder on the outside of the annular frame, so that the shape of the external formwork of the cylinder is the same as that of the wall of the elevator shaft, and the distance between the external formwork of the cylinder and the annular frame is is the set elevator wall thickness; S4. Pouring foundation concrete between the outer formwork of the cylinder and the annular frame; S5. After the concrete wall is formed, remove the outer formwork of the cylinder and the wall screw, and adjust the adjustment assembly so that the area enclosed by the annular frame is reduced, so that the annular frame is separated from the concrete wall; S6. Hoisting the horizontal height of the annular frame and adjusting the adjustment assembly so that the enclosed area of the annular frame becomes larger; Then steps S2-S6 are repeated until the construction of the elevator is completed. 7. The construction method of the elevator shaft as claimed in claim 6, characterized in that: in the step S1, after the assembly of the ring-shaped frame is completed, evenly coat the inner plastic plate on the outside of the keel frame With release agent. 8. The construction method of the elevator shaft according to claim 6, characterized in that: in the step S2, the wall-penetrating screw includes a sleeve and a screw member passing through the sleeve, so The length of the sleeve is greater than the wall thickness of the elevator, and the length of the screw member is greater than the length of the sleeve. 9. The construction method of the elevator shaft as claimed in claim 6, characterized in that: in the step S3, the outer formwork of the cylinder includes an outer plastic plate arranged parallel to the outer wall of the annular frame and connected to The outer side of the outer plastic plate is used for fixing the fasteners of the outer plastic plate, and the outer plastic plate is connected to the wall-penetrating screw rod. 10. The construction method of the elevator shaft according to claim 6, characterized in that: in the step S6, after hoisting the ring-shaped frame, it is leveled first, and then the adjustment assembly is adjusted so that the The inner plastic-clad board on the outer side of the keel frame is attached to the inner wall of the elevator that has been poured.