Narrow space basement outer wall formwork construction device and use method

Abstract

The application discloses a narrow-space basement outer wall formwork construction device and a use method thereof. The narrow-space basement outer wall formwork construction device and the use method thereof adopt a prefabricated hollow high-strength steel formwork which can be assembled, and a wall body of various sizes is made in a modular manner. The size of each prefabricated hollow steel formwork which can be assembled is assembled according to requirements, the construction is convenient and fast, the construction cost is reduced, various layer heights can be adapted, and the prefabricated hollow high-strength steel formwork and a sliding groove type water stop screw are combined for use. The effect of fixing the outer formwork from the inner formwork is achieved through the connection and fastening of the outer rod of the traditional formwork and the conical connecting female of the sliding groove type water stop screw. In the use process, the use of the traditional single-side formwork steel pipe is greatly reduced, and materials are saved.

Description

Technical Field

[0001] This invention relates to the field of exterior wall formwork construction technology, specifically to a construction device and method for exterior wall formwork in a narrow space, such as a basement. Background Technology

[0002] With the rapid development of urban construction, the control over the boundary lines of building construction land is becoming increasingly strict, resulting in increasingly narrow construction sites. Meanwhile, underground foundation pits and above-ground structural projects are developing towards greater depth, height, and scale, thus placing higher demands on the single-sided formwork structures and construction techniques for tall side walls. Because the space between the basement exterior wall and the foundation pit support piles cannot meet the requirements for formwork construction, double-sided formwork construction of the exterior wall cannot be carried out using conventional methods. Therefore, the basement exterior wall is constructed using a single-sided formwork method. However, the traditional single-sided formwork frame is too large, making it unsuitable for installation in areas with varying heights or open spaces on the inner side of the basement exterior wall. Furthermore, the installation process is complex and consumes more steel.

[0003] While there are existing examples of external wall formwork construction methods, some shortcomings remain when dealing with confined spaces like basements.

[0004] 1. As disclosed in the public document CN103912008A, a single-sided formwork structure and its construction method are provided. This method can solve problems such as bottom formwork bulging, difficulty in moving scaffolding, inconvenience in erection and dismantling, and difficulty in hoisting heavy steel formwork, which affect the construction progress in conventional single-sided formwork. However, this construction technology has the following problems: it requires pre-embedded bolts, which need to be removed later, which may lead to water leakage. In addition, the structure is relatively complex and the on-site operation is difficult.

[0005] 2. As disclosed in document CN113027118A, a reusable, modular, single-sided support steel scaffold solves the problem of installation limitations on the inner side of basement exterior walls where there are varying heights or elevated floors. It boasts advantages such as simple structure, higher modularity and processing precision, smaller module size, safety and stability, convenient and quick construction, reduced construction costs, and adaptability to various floor heights. It can be repeatedly installed and dismantled as needed, allowing for repeated use in different projects. However, this construction technology has drawbacks: it requires a large amount of steel pipe material, making installation and dismantling difficult, and the use of steel scaffolds increases the risks during construction.

[0006] 3. For example, the public document with publication number CN106013158A describes a single-sided support device for aluminum alloy formwork. This device utilizes the high rigidity, good flatness, and easy and efficient assembly and disassembly of aluminum alloy formwork, and is combined with simple installation and disassembly supports and embedded parts for coordinated operation. However, this construction technology has the following problems: the need for pre-embedded bolts may lead to water leakage during later removal, and the structure is relatively complex, making on-site operation difficult and requiring high-cost aluminum formwork.

[0007] Therefore, how to solve the problem of single-sided formwork support for basement exterior walls in narrow spaces and achieve the effect of fixing the outer formwork from the inner formwork has become an urgent problem to be solved. In view of this, a construction device and method for basement exterior wall formwork in narrow spaces are designed. Summary of the Invention

[0008] The purpose of this invention is to provide a construction device and method for formwork on the exterior walls of basements in narrow spaces, in order to solve the problems existing in the current construction methods for exterior walls of basements in narrow spaces as mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a construction device for basement exterior wall formwork in a narrow space, comprising a prefabricated hollow high-strength steel formwork, a sliding groove water-stop bolt, and a guide wall;

[0010] The inner side of the precast hollow high-strength steel template is provided with an active high-strength steel gear, a driven high-strength steel gear, a transmission square rod, a fixed round rod, and an exposed connector. The fixed round rod is movably inserted through the inner wall of the precast hollow high-strength steel template. The driven high-strength steel gear is fixedly sleeved on the outer side of the fixed round rod. The top of the transmission square rod is connected to the active high-strength steel gear, and the bottom of the transmission square rod is fixedly connected to the exposed connector. The exposed connector extends movably to the outer side of the precast hollow high-strength steel template.

[0011] The grooved water-stop screw rod includes an inner rod, a grooved water-stop block fixedly connected to one end of the inner rod, and a tapered connecting nut fixedly connected to the other end of the inner rod. The grooved water-stop screw rod is connected to the precast hollow high-strength steel template through the grooved water-stop block.

[0012] Preferably, the dimensions of the prefabricated hollow high-strength steel template are 500mm×500mm×100mm.

[0013] Preferably, the front and bottom sides of the prefabricated hollow high-strength steel formwork are integrally connected with protruding connecting units, and the rear and top sides of the prefabricated hollow high-strength steel formwork are integrally connected with concave connecting units, wherein the protruding connecting units and the concave connecting units are matched and connected.

[0014] Preferably, a square hole is formed through the bottom of the driving high-strength steel gear, and both the driving high-strength steel gear and the driven high-strength steel gear are bevel gears, which mesh and drive each other.

[0015] Preferably, the top of the transmission rod is hollow, and the top of the transmission rod is connected to the square hole after being enlarged. After the top of the transmission rod is enlarged, its length and width are adapted to the length and width of the square hole.

[0016] Preferably, the inner diameter of the driven high-strength steel gear is adapted to the diameter of the fixed round rod.

[0017] Preferably, the sliding waterstop block has a crescent-shaped groove on the side away from the inner rod, and the exposed connector is crescent-shaped and connected to the crescent-shaped groove.

[0018] A construction device for formwork on the exterior walls of a basement in a narrow space, the method of use of which is as follows:

[0019] S1. Measure and lay out the lines on the outside of the guide wall. On-site workers position and splice the precast hollow high-strength steel formwork layer by layer according to the layout lines.

[0020] S2. Connect the grooved water-stop bolt to the exposed connector, tie the external wall steel reinforcement skeleton, and after the skeleton is tied, erect the traditional formwork on the inside of the external wall. After the traditional formwork is erected, fasten the outer rod of the traditional formwork to the tapered connector and pour concrete.

[0021] S3. After the concrete pouring is completed and the demolding conditions are met, twist the fixed round rod. The fixed round rod drives the driven high-strength steel gear to rotate, which in turn drives the active high-strength steel gear to rotate, thereby enabling the exposed connector to detach from the inside of the sliding waterstop block. Finally, the precast hollow high-strength steel formwork is completely removed by lifting.

[0022] Preferably, in step S1, the specific steps for splicing the precast hollow high-strength steel formwork layer by layer are as follows:

[0023] The connection between each pair of prefabricated hollow high-strength steel formwork is achieved by using convex and concave connection units at the front and rear of the prefabricated hollow high-strength steel formwork.

[0024] The prefabricated hollow high-strength steel formwork is connected by convex and concave connecting units on the upper and lower sides. The connection between each pair of adjacent sets of prefabricated hollow high-strength steel formwork is achieved by using convex connecting units and concave connecting units on the upper and lower sides.

[0025] Preferably, in step S2, the specific steps for connecting the grooved water-stop screw to the exposed connector are as follows:

[0026] Twisting the fixed round rod causes the driven high-strength steel gear to rotate, which in turn drives the active high-strength steel gear to rotate, thus enabling the exposed connector to connect to the inner side of the sliding waterstop block, and further enabling the exposed connector to be snapped together with the sliding waterstop screw.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The construction device and usage method for the basement exterior wall formwork in this narrow space adopts prefabricated hollow high-strength steel formwork that can be assembled. The modular production is suitable for walls of various sizes, and the individual size is smaller. Each prefabricated hollow steel formwork is only 500mm×500mm×100mm in size. It can be assembled according to needs, making construction convenient and quick, reducing construction costs, adapting to various floor heights, and can be repeatedly installed and disassembled as needed, and reused in different projects.

[0029] 2. The construction device and usage method of the basement exterior wall formwork in this narrow space adopts the combination of prefabricated hollow high-strength steel formwork and grooved water-stop bolts. By connecting and tightening the outer rod of the traditional formwork with the tapered connecting nut of the grooved water-stop bolt, the effect of fixing the outer formwork from the inner formwork is achieved. During use, the use of traditional single-sided support steel pipes is greatly reduced, saving materials.

[0030] 3. The construction device and method for the formwork of the basement exterior wall in narrow space can realize the rapid splicing and dismantling of the formwork of the basement exterior wall in narrow space, which improves construction efficiency and safety. It adopts prefabricated hollow high-strength steel formwork, which has the advantages of being lightweight, high-strength, and corrosion-resistant, and can save material costs and maintenance costs.

[0031] 4. The construction device and method for the formwork of the basement exterior wall in this narrow space utilizes a sliding groove water-stop screw and an exposed connector, which can effectively prevent concrete leakage and formwork deformation, ensuring construction quality and aesthetics. It uses active high-strength steel gears and driven high-strength steel gears, which can realize the rapid adjustment and locking of the formwork, facilitating construction operation and management. Attached Figure Description

[0032] Figure 1 This is a top sectional view of the prefabricated hollow high-strength steel formwork structure of the construction device and method for using the formwork of the basement exterior wall in a narrow space according to the present invention.

[0033] Figure 2 This is a top view of a prefabricated hollow high-strength steel formwork for a construction device and method of using a basement exterior wall formwork in a narrow space, according to the present invention.

[0034] Figure 3 This is a top view of a grooved water-stop screw rod used in a construction device and method for building exterior walls in a narrow space basement, according to the present invention.

[0035] Figure 4 This is a side view of a prefabricated hollow high-strength steel formwork for a construction device and method of using formwork for basement exterior walls in a narrow space, according to the present invention.

[0036] Figure 5 This is a top view during construction of a formwork construction device and method for basement exterior walls in a narrow space, according to the present invention.

[0037] Figure 6 This is a cross-sectional view of the active high-strength steel gear and transmission square rod connection in a construction device and method for building exterior wall formwork in a narrow space basement according to the present invention.

[0038] Figure 7 This is a cross-sectional view of the transmission square rod before the hole is enlarged in the construction device and method for building exterior wall formwork in a narrow space of the basement of the present invention.

[0039] Figure 8 This is a cross-sectional view of the transmission square rod after enlarging the hole in the construction device and method for building exterior wall formwork in a narrow space of the basement according to the present invention.

[0040] In the picture:

[0041] 1. Precast hollow high-strength steel formwork; 11. Active high-strength steel gear; 111. Square hole;

[0042] 12. Driven high-strength steel gear; 13. Transmission square rod; 14. Fixed round rod;

[0043] 15. Exposed connector; 16. Male connector unit; 17. Female connector unit;

[0044] 2. Sliding groove type water-stop screw rod; 21. Sliding groove type water-stop block; 22. Inner rod;

[0045] 23. Tapered connector;

[0046] 3. Guide wall. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Please see Figure 1-8 The present invention provides a technical solution: a construction device for the exterior wall formwork of a basement in a narrow space, comprising a prefabricated hollow high-strength steel formwork 1, a sliding groove water-stop bolt 2, and a guide wall 3.

[0051] The inner side of the precast hollow high-strength steel formwork 1 is provided with an active high-strength steel gear 11, a driven high-strength steel gear 12, a transmission square rod 13, a fixed round rod 14, and an exposed connector 15. The fixed round rod 14 is movably inserted through the inner wall of the precast hollow high-strength steel formwork 1. The driven high-strength steel gear 12 is fixedly sleeved on the outer side of the fixed round rod 14. The top of the transmission square rod 13 is connected to the active high-strength steel gear 11, and the bottom of the transmission square rod 13 is fixedly connected to the exposed connector 15. The exposed connector 15 extends movably to the outer side of the precast hollow high-strength steel formwork 1.

[0052] Specifically, the driving high-strength steel gear 11, the driven high-strength steel gear 12, the transmission square rod 13, the fixed round rod 14, and the exposed connector 15 are all made of high-strength steel.

[0053] Specifically, the exposed connector 15 has a smooth surface after polishing.

[0054] Specifically, one end of the fixed round rod 14 extends to the outside of the precast hollow high-strength steel template 1 to facilitate external operation during use.

[0055] For details, please refer to the attached instruction manual. Figure 4 The precast hollow high-strength steel formwork 1 has a slot on its side for the movement of the exposed connector 15.

[0056] For details, please refer to the attached instruction manual. Figure 1 The inner cavity of the prefabricated hollow high-strength steel template 1 has a limiting function for both the driving high-strength steel gear 11 and the driven high-strength steel gear 12. The lower end of the transmission square rod 13 is cylindrical and is movably inserted through the inner wall of the prefabricated hollow high-strength steel template 1, thereby realizing the limiting rotation of the driving high-strength steel gear 11 in one go.

[0057] The grooved water-stop screw rod 2 includes an inner rod 22, a grooved water-stop block 21 fixedly connected to one end of the inner rod 22, and a tapered connecting nut 23 fixedly connected to the other end of the inner rod 22. The grooved water-stop screw rod 2 is connected to the precast hollow high-strength steel template 1 through the grooved water-stop block 21.

[0058] Specifically, the length of the inner rod 22 can be customized according to the wall thickness.

[0059] The dimensions of the precast hollow high-strength steel formwork 1 are 500mm×500mm×100mm.

[0060] Specifically, prefabricated hollow high-strength steel formwork 1 was adopted, with dimensions of 500mm×500mm×100mm. This facilitates the transportation, storage, and installation of the formwork, saving space and time. Modular manufacturing is suitable for walls of various sizes, with smaller individual dimensions, making construction convenient and quick.

[0061] The front and bottom sides of the precast hollow high-strength steel formwork 1 are integrally connected with protruding connecting units 16, and the rear and top sides are integrally connected with concave connecting units 17. The protruding connecting units 16 and concave connecting units 17 are matched and connected. Specifically, the front protruding connecting unit 16 corresponds to the rear concave connecting unit 17, and the bottom protruding connecting unit 16 corresponds to the top concave connecting unit 17. By utilizing the front and rear, and top and bottom protruding connecting units 16 and concave connecting units 17 of the precast hollow high-strength steel formwork 1, the formwork can be quickly assembled and disassembled without the need for other auxiliary tools or materials, simplifying the construction process and operation. It can be assembled vertically and horizontally as needed, making construction convenient and fast, reducing construction costs, adapting to various floor heights, and can be repeatedly assembled and disassembled as needed, allowing for repeated reuse in different projects.

[0062] Specifically, a combination of prefabricated hollow high-strength steel formwork 1 and sliding groove water-stop screw 2 is used. By connecting and tightening the outer rod of the traditional formwork with the tapered connecting nut 23 of the sliding groove water-stop screw 2, the effect of fixing the outer formwork from the inner formwork is achieved. During use, the use of traditional single-sided support steel pipes is greatly reduced, saving materials.

[0063] A square hole 111 is formed through the bottom of the driving high-strength steel gear 11, and both the driving high-strength steel gear 11 and the driven high-strength steel gear 12 are bevel gears, which mesh and drive each other. Specifically, the use of both driving high-strength steel gear 11 and driven high-strength steel gear 12, both of which are bevel gears, enables synchronous rotation between them.

[0064] The top of the transmission rod 13 is hollow, and after being enlarged, it connects to the square hole 111. The length and width of the enlarged top of the transmission rod 13 are matched to the length and width of the square hole 111. Specifically, this increases the contact area and friction between the transmission rod 13 and the driving high-strength steel gear 11, ensuring transmission efficiency and reliability.

[0065] The inner diameter of the driven high-strength steel gear 12 is matched with the diameter of the fixed round rod 14. Specifically, the fixed round rod 14 is fixed to the inner side of the driven high-strength steel gear 12, which allows a tight fit between the driven high-strength steel gear 12 and the fixed round rod 14, ensuring transmission efficiency and quality.

[0066] The grooved waterstop block 21 has a crescent-shaped groove on the side away from the inner rod 22, and the exposed connector 15 is crescent-shaped and connected to the crescent-shaped groove. Specifically, this allows the exposed connector 15 to form a snap-fit ​​connection with the grooved waterstop block 21, increasing the connection strength and sealing performance, and effectively preventing concrete leakage and formwork deformation.

[0067] A construction device for formwork on the exterior walls of a basement in a narrow space, the method of use of which is as follows:

[0068] S1. Measure and lay out the lines on the outside of the guide wall 3. On-site workers position and splice the precast hollow high-strength steel formwork 1 layer by layer according to the layout position.

[0069] S2. Connect the grooved water-stop screw rod 2 to the exposed connector 15, tie the external wall steel reinforcement skeleton, and after the skeleton is tied, erect a traditional formwork on the inside of the external wall. After the traditional formwork is erected, fasten the outer rod of the traditional formwork to the tapered connector nut 23 and pour concrete.

[0070] S3. After the concrete pouring is completed and the demolding conditions are met, twist the fixed round rod 14. The fixed round rod 14 drives the driven high-strength steel gear 12 to rotate, thereby driving the active high-strength steel gear 11 to rotate, thereby realizing the external connector 15 to detach from the inside of the sliding waterstop block 21. Finally, the prefabricated hollow high-strength steel formwork 1 is completely removed by lifting.

[0071] In step S1, the specific steps for splicing the precast hollow high-strength steel formwork 1 layer by layer are as follows:

[0072] The prefabricated hollow high-strength steel formwork 1 is connected by the convex connecting unit 16 and concave connecting unit 17 at the front and rear of the prefabricated hollow high-strength steel formwork 1.

[0073] The prefabricated hollow high-strength steel formwork 1 is connected by the convex connecting unit 16 and concave connecting unit 17 on the upper and lower sides. The connection between each pair of adjacent sets of prefabricated hollow high-strength steel formwork 1 is achieved.

[0074] In step S2, the specific steps for connecting the grooved water-stop screw 2 to the exposed connector 15 are as follows:

[0075] Twisting the fixed round rod 14 causes the driven high-strength steel gear 12 to rotate, which in turn drives the active high-strength steel gear 11 to rotate, thereby enabling the exposed connector 15 to connect to the inner side of the sliding water-stop block 21, and thus enabling the exposed connector 15 to be snapped together with the sliding water-stop screw 2.

[0076] Specifically, the method for using formwork for basement exterior walls in narrow spaces includes the following steps: measuring and setting out lines on the outside of the guide wall, splicing precast hollow high-strength steel formwork 1 layer by layer, connecting the sliding water-stop bolts 2 to the exposed connectors 15, binding the exterior wall steel reinforcement skeleton, erecting traditional formwork, pouring concrete, twisting and fixing the round rods 14, and dismantling the precast hollow high-strength steel formwork. This method is simple to operate, has a clear process, is efficient, and produces good quality.

[0077] Specifically, the construction device and method for the formwork of the basement exterior wall in narrow spaces can realize the rapid splicing and dismantling of the formwork, improving construction efficiency and safety. It adopts prefabricated hollow high-strength steel formwork 1, which has the advantages of being lightweight, high-strength, and corrosion-resistant, and can save material costs and maintenance expenses.

[0078] Specifically, the construction device and method for the formwork of the basement exterior wall in this narrow space utilizes a sliding groove-type water-stop screw 2 and an exposed connector 15, which can effectively prevent concrete leakage and formwork deformation, ensuring construction quality and aesthetics. The active high-strength steel gear 11 and the driven high-strength steel gear 12 are used to realize the rapid adjustment and locking of the formwork, which facilitates construction operation and management.

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction device for formwork on the exterior walls of a basement in a narrow space, characterized in that: It includes prefabricated hollow high-strength steel formwork (1), grooved water-stop bolts (2) and guide walls (3); The inner side of the prefabricated hollow high-strength steel template (1) is provided with an active high-strength steel gear (11), a driven high-strength steel gear (12), a transmission square rod (13), a fixed round rod (14), and an exposed connector (15). The fixed round rod (14) is movably inserted through the inner wall of the prefabricated hollow high-strength steel template (1). The driven high-strength steel gear (12) is fixedly sleeved on the outer side of the fixed round rod (14). The top of the transmission square rod (13) is connected to the active high-strength steel gear (11), and the bottom of the transmission square rod (13) is fixedly connected to the exposed connector (15). The exposed connector (15) extends movably to the outer side of the prefabricated hollow high-strength steel template (1). The grooved water-stop screw (2) includes an inner rod (22), a grooved water-stop block (21) fixedly connected to one end of the inner rod (22), and a tapered connecting nut (23) fixedly connected to the other end of the inner rod (22). The grooved water-stop screw (2) is connected to the precast hollow high-strength steel template (1) through the grooved water-stop block (21). The front and bottom sides of the prefabricated hollow high-strength steel template (1) are integrally connected with convex connecting units (16), and the rear and top sides of the prefabricated hollow high-strength steel template (1) are integrally connected with concave connecting units (17). The convex connecting units (16) and concave connecting units (17) are matched and connected. The sliding waterstop block (21) has a crescent-shaped groove on the side away from the inner rod (22), and the exposed connector (15) is crescent-shaped and connected in the crescent-shaped groove.

2. The formwork construction device for basement exterior walls in a narrow space according to claim 1, characterized in that: The dimensions of the prefabricated hollow high-strength steel formwork (1) are 500mm×500mm×100mm.

3. The formwork construction device for basement exterior walls in a narrow space according to claim 2, characterized in that: The bottom of the active high-strength steel gear (11) has a square hole (111) through it, and both the active high-strength steel gear (11) and the driven high-strength steel gear (12) are bevel gears. The active high-strength steel gear (11) and the driven high-strength steel gear (12) are meshed and connected for transmission.

4. The formwork construction device for basement exterior walls in a narrow space according to claim 3, characterized in that: The top of the transmission rod (13) is hollow, and the top of the transmission rod (13) is connected to the square hole (111) after the hole is enlarged. After the hole is enlarged, the length and width of the transmission rod (13) are matched with the length and width of the square hole (111).

5. A construction device for basement exterior wall formwork in a narrow space according to claim 4, characterized in that: The inner diameter of the driven high-strength steel gear (12) is adapted to the diameter of the fixed round rod (14).

6. The method of using the formwork construction device for basement exterior walls in a narrow space according to any one of claims 1-5 is as follows: S1. Measure and lay out the lines on the outside of the guide wall (3). On-site workers position and splice the prefabricated hollow high-strength steel formwork (1) layer by layer according to the layout position. S2. Connect the grooved water-stop screw rod (2) to the exposed connector (15), tie the outer wall steel reinforcement skeleton, and after the skeleton is tied, set up the traditional formwork on the inner side of the outer wall. After the traditional formwork is set up, fasten the outer rod of the traditional formwork to the tapered connector (23) and pour concrete. S3. After the concrete is poured and the demolding conditions are met, twist the fixed round rod (14). The fixed round rod (14) drives the driven high-strength steel gear (12) to rotate, thereby driving the active high-strength steel gear (11) to rotate, thereby realizing the removal of the exposed connector (15) from the inside of the sliding waterstop block (21). Finally, the prefabricated hollow high-strength steel template (1) is completely removed by lifting.

7. The method of using the formwork construction device for basement exterior walls in a narrow space according to claim 6, characterized in that, In step S1, the specific steps for splicing the precast hollow high-strength steel formwork (1) layer by layer are as follows: The prefabricated hollow high-strength steel templates (1) are connected by the convex connecting unit (16) and concave connecting unit (17) at the front and back of the prefabricated hollow high-strength steel template (1). The prefabricated hollow high-strength steel formwork (1) is connected by the convex connecting unit (16) and concave connecting unit (17) on the upper and lower sides. The two adjacent sets of prefabricated hollow high-strength steel formwork (1) are connected by the convex connecting unit (16) and concave connecting unit (17) on the upper and lower sides.

8. The method of using the formwork construction device for basement exterior walls in a narrow space according to claim 7, characterized in that, In step S2, the specific steps for connecting the sliding groove type water-stop screw (2) to the exposed connector (15) are as follows: Twist the fixed round rod (14), and the fixed round rod (14) will drive the driven high-strength steel gear (12) to rotate, thereby driving the active high-strength steel gear (11) to rotate, thereby realizing the connection of the exposed connector (15) to the inner side of the sliding water stop block (21), and thus realizing the snap connection between the exposed connector (15) and the sliding water stop screw (2).

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