Adjustable connecting piece for underground structure and construction method of adjustable connecting piece

Abstract

The invention discloses an adjustable connecting piece for an underground structure and a construction method of the adjustable connecting piece, and relates to the technical field of underground structure construction, the adjustable connecting piece is supported and connected between an underground structure template and a steel sheet pile support, and the adjustable connecting piece comprises a magnet, a steel bar claw spherical hinge, a steel pipe and a template end collet; the steel pipe is horizontally arranged between the first magnetic pole and the second magnetic pole; the end, away from the steel pipe, of the formwork end bottom support is connected to one of the first magnetic pole and the second magnetic pole. One end, far away from the steel pipe, of the steel bar claw spherical hinge is connected to the other of the first magnetic pole and the second magnetic pole. According to the construction method, the sheet pile support and the movable formwork are safely connected through the adjustable connecting piece, so that the structural outer formwork and the steel sheet pile support which are stressed respectively tend to integrally and jointly resist the soil pressure outside the foundation pit and the concrete pouring pressure inside the foundation pit, the stability of the support structure is improved, the excavation area of the foundation pit is reduced to a certain extent, and the construction efficiency is improved. The construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground structure construction, and in particular to an adjustable connector for underground structures and a construction method. Background Art

[0002] During the construction of underground structures, steel bar binding and formwork installation are usually carried out inside the foundation pit. In order to ensure that there is enough working space for steel bar binding and formwork installation, it is often necessary to increase the excavation area of ​​the foundation pit. However, in order to reduce the amount of earth excavation, it is necessary to reduce the working space, which will lead to reduced construction efficiency. In actual construction, it is difficult to balance the contradiction between working space and excavation area, which easily leads to waste of resources and increased costs.

[0003] In addition, the steel sheet pile support and formwork engineering of the foundation pit are usually carried out separately. The steel sheet pile support is used to resist the soil pressure outside the foundation pit, while the structural external formwork is used to resist the concrete pouring pressure. The pressure of the soil outside the foundation pit on the steel sheet pile is in the opposite direction to the pressure of the concrete poured inside the formwork on the formwork. If there is a reliable and convenient adjustable connector that can connect the underground structure formwork and the steel sheet pile support as a whole to coordinate the force, it can not only solve the contradiction between the working space and the excavation area, improve construction efficiency, but also increase the integrity and stability of the support structure. Summary of the invention

[0004] In view of this, and in response to technical problems existing in the prior art such as the difficulty in balancing the working space and the excavation area and the insufficient stability of the support structure, the present invention aims to provide an adjustable connecting piece and a construction method for underground structures, so as to connect the outer formwork of the underground structure and the steel sheet pile support of the foundation pit into a whole, so that they can cooperate to resist the soil pressure outside the foundation pit and the concrete pouring pressure inside the foundation pit, improve the stability of the support structure, simplify the construction process, reduce the construction time, and reduce the construction cost.

[0005] In order to solve the above problems, the first object of the present invention is to provide an adjustable connector for underground structures, which is supported and connected between the underground structure template and the steel sheet pile support, comprising:

[0006] A magnet having a first magnetic pole and a second magnetic pole arranged opposite to each other;

[0007] A steel pipe, horizontally arranged between the first magnetic pole and the second magnetic pole;

[0008] A template end base is connected to one end of the steel pipe, and an end of the template end base away from the steel pipe is connected to one of the first magnetic pole and the second magnetic pole;

[0009] The steel bar claw ball joint is connected to the end of the steel pipe away from the template end bottom support, and the end of the steel bar claw ball joint away from the steel pipe is connected to the other of the first magnetic pole and the second magnetic pole.

[0010] Preferably, the template end base includes a base nut, a base screw and a block support, one end of the base nut is connected to the end of the steel pipe, and the other end is threadedly connected to the end of the base screw, and the end of the base screw away from the base nut is connected to the block support.

[0011] Preferably, the steel bar claw ball joint includes a base, a hollow sphere, a steel bar claw and a bracket, a plurality of the steel bar claws are evenly connected to the base on a circumference, the hollow sphere is connected to the steel pipe and covered inside the plurality of the steel bar claws, one end of the bracket is connected to the base, and the other end is supported on the outer circumference of the steel pipe.

[0012] Preferably, the magnet is made of neodymium iron boron material.

[0013] Preferably, the base nut includes a nut body and a first sleeve opening and a first threaded pipe opening coaxially and integrally connected on both sides of the nut body, the first sleeve opening is suitable for being sleeved on the steel pipe, and the first threaded pipe opening is suitable for being threadedly connected to the base screw.

[0014] Preferably, the diameter of the steel pipe is 47-49 mm.

[0015] Preferably, the depth of the first sleeve opening is not less than 10 mm, and the thread length of the first threaded pipe opening is not less than 8 mm.

[0016] Preferably, the base is made of a square steel plate, and the steel bar support is made of steel bars.

[0017] Preferably, a plurality of the steel bar claws are bent to form a ball cage shape, and the steel bar size in the steel bar claws is 5-10 mm, and the number of steel bars is not less than 3.

[0018] The second object of the present invention is to provide a construction method for the adjustable connector for underground structures according to the above, the construction method comprising the steps of:

[0019] Step S 100 : After the sheet pile support is inserted in place, the foundation pit is excavated so that the sheet pile support becomes the side wall of the foundation pit, and one pole of the magnet is accurately positioned and magnetically attracted to the inner side wall of the sheet pile support that has been firmly inserted and excavated;

[0020] Step S 200: The base of the steel claw ball joint is magnetically attracted to the magnet, and the hollow sphere and the steel claw are combined to form a ball joint structure, so that the angle of the supporting connector can be automatically adjusted according to needs;

[0021] Step S 300 : Use the bracket to support the steel pipe and ensure that the steel pipe is in a horizontal state. At the same time, accurately insert the bottom support screw of the template end bottom support into the steel pipe, and screw the bottom support nut to adjust the length of the supporting connector until the connector can be fully supported on the template end;

[0022] Step S 400 : Stick the other pole of the magnet on the square supporting surface of the base at the template end again.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The adjustable connector support for underground structures in this application is connected between the underground structure template and the steel sheet pile support, and the adjustable connector is composed of a magnet, a steel claw ball joint, a steel pipe and a template end bottom support, wherein the magnet has a first magnetic pole and a second magnetic pole arranged relatively, so that the magnet can generate a strong magnetic field, thereby achieving a firm adsorption of the steel sheet pile support and the underground structure template, and can also effectively prevent the connector from loosening or shifting during the construction process. The template end bottom support and the steel claw ball joint are respectively connected to the two magnetic poles of the magnet, further enhancing the stability of the connector. The double adsorption design not only improves the reliability of the connection, but also can disperse stress and reduce damage caused by excessive local force. The steel claw ball joint can achieve multi-directional angle adjustment through its ball joint structure. This design enables the connector to be flexibly adjusted according to actual construction needs to adapt to different construction environments and angle requirements. The steel pipe, as the main body of the connector, provides a stable support platform. It is horizontally arranged between the two magnetic poles of the magnet to ensure the overall structural stability of the connector. Therefore, the structural outer formwork of the underground structure and the steel sheet pile support of its foundation pit are safely and effectively connected together through adjustable connecting parts, so that the structural outer formwork and steel sheet pile support that are subjected to different forces are integrated to jointly resist the soil pressure outside the foundation pit and the concrete pouring pressure inside the foundation pit, which greatly improves the stability of the support structure, reduces the excavation area of ​​the foundation pit to a certain extent, and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a three-dimensional structure of an adjustable connector for underground structures in an embodiment of the present invention;

[0026] Figure 2 It is a schematic flow chart of a construction method of an adjustable connector for underground structures in an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1-magnet; 11-first magnetic pole; 12-second magnetic pole;

[0029] 2- Steel claw ball hinge;

[0030] 21-base; 22-hollow sphere; 23-steel claw; 24-bracket;

[0031] 3- Steel pipe;

[0032] 4-template end base support; 41-base support nut; 411-nut body; 412-first sleeve pipe opening; 413-first threaded pipe opening; 42-base support screw; 43-block support. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] See also Figure 1 As shown, an embodiment of the present invention provides an adjustable connector for underground structures, the adjustable connector is supported and connected between the underground structure template and the steel sheet pile support, and the adjustable connector includes a magnet 1, a steel bar claw ball joint 2, a steel pipe 3 and a template end bottom support 4, wherein:

[0037] The magnet 1 has a first magnetic pole 11 and a second magnetic pole 12 that are arranged opposite to each other, so that the magnet 1 can generate a strong magnetic field, thereby achieving firm adsorption of steel sheet pile support and underground structure templates; the steel pipe 3 is horizontally arranged between the first magnetic pole 11 and the second magnetic pole 12; the template end base 4 is connected to one end of the steel pipe 3, and the end of the template end base 4 away from the steel pipe 3 is connected to one of the first magnetic pole 11 and the second magnetic pole 12; the steel bar claw ball joint 2 is connected to one end of the steel pipe 3 away from the template end base 4, and the end of the steel bar claw ball joint 2 away from the steel pipe 3 is connected to the other of the first magnetic pole 11 and the second magnetic pole 12.

[0038] Specifically, in the specific scheme of the embodiment of the present invention, the magnet 1 can be firmly adsorbed on the steel sheet pile support and the underground structure formwork through its strong magnetic field. This adsorption force not only provides stable support, but also can effectively prevent the connector from loosening or shifting during the construction process. The template end base 4 and the steel bar claw ball joint 2 are respectively connected to the two magnetic poles of the magnet 1, which further enhances the stability of the connector. The double adsorption design not only improves the reliability of the connection, but also can disperse stress and reduce damage caused by excessive local force. The steel bar claw ball joint 2 can achieve multi-directional angle adjustment through its ball joint structure. This design enables the connector to be flexibly adjusted according to actual construction needs to adapt to different construction environments and angle requirements. The steel pipe 3, as the main body of the connector, provides a stable support platform. It is horizontally arranged between the two magnetic poles of the magnet 1 to ensure the overall structural stability of the connector.

[0039] Therefore, the structural outer formwork of the underground structure and the steel sheet pile support of its foundation pit are safely and effectively connected together through adjustable connecting parts, so that the structural outer formwork and steel sheet pile support that are subjected to different forces are integrated to jointly resist the soil pressure outside the foundation pit and the concrete pouring pressure inside the foundation pit, which greatly improves the stability of the support structure, reduces the excavation area of ​​the foundation pit to a certain extent, and improves construction efficiency.

[0040] Specifically, see Figure 1 As shown, the template end base 4 includes a base nut 41, a base screw 42 and a block support 43. One end of the base nut 41 is connected to the end of the steel pipe 3 to fix the steel pipe 3; the other end is threadedly connected to the end of the base screw 42, and the end of the base screw 42 away from the base nut 41 is connected to the block support 43 to provide an adjustable connection method.

[0041] Specifically in this embodiment, the template end base 4 is composed of a base nut 41, a base screw 42 and a block support 43. This modular design allows each component to be produced and installed separately, thereby improving production efficiency and quality control. The threaded connection not only provides adjustability, but also makes the installation and disassembly process more convenient. Through a simple rotation operation, the base nut 41 and the base screw 42 can be quickly connected and separated.

[0042] Specifically, see Figure 1 As shown, the steel claw ball hinge 2 includes a base 21, a hollow sphere 22, a steel claw 23 and a bracket 24, wherein a plurality of steel claws 23 are evenly connected to the base 21, and the hollow sphere 22 is connected to the steel pipe 3 and covered inside the plurality of steel claws 23. One end of the bracket 24 is connected to the base 21, and the other end is supported on the outer circumference of the steel pipe 3, which enhances the stability of the steel pipe 3 and prevents it from deflecting or bending when subjected to force. In addition, the supporting effect of the bracket 24 disperses the force on the steel pipe 3, reduces local stress concentration, and improves the bearing capacity of the overall structure. The base 21 is fixed to the steel sheet pile support by a magnet 1, which simplifies the installation process. This magnetic fixation method does not require complicated welding or bolting, which improves construction efficiency.

[0043] The hollow sphere 22 is wrapped inside the plurality of steel bar claws 23 to form a ball joint structure. This design allows the steel pipe 3 to rotate freely within a certain range, thereby achieving angle adjustment of the connector.

[0044] Therefore, during the construction process, there may be unevenness or tilt between the underground structure formwork and the steel sheet pile support. Through the ball joint structure, the connector can adaptively adjust the angle to ensure the stability and tightness of the support.

[0045] In addition, the steel claws 23 are evenly distributed on the base 21 around the circumference, providing a uniform supporting force, ensuring that the hollow sphere 22 can rotate stably when subjected to force, and avoiding local stress concentration.

[0046] Finally, during the construction process, the connector needs to withstand forces from different directions, and the uniform distribution of the steel bar claws 23 ensures that the connector can maintain balance when subjected to force, thereby extending its service life.

[0047] Therefore, the design of the steel bar claw ball joint 2 realizes the angle adjustment function through the ball joint structure; the stability of the support and the uniformity of force are ensured by the uniform distribution of the bracket 24 and the steel bar claw 23, and the convenience of installation is improved by the magnetic fixation method. These settings enable the connector to adapt to complex environments and force conditions in the construction of underground structures and provide reliable support and connection.

[0048] Specifically, the magnet 1 in the embodiment of the present invention is made of neodymium iron boron material, which has high magnetic energy product and high coercive force. Preferably, the first magnetic pole 11 and the second magnetic pole 12 of this embodiment are arranged opposite to each other, so that the magnet 1 can generate a strong magnetic field, thereby achieving firm adsorption of steel sheet pile support and formwork.

[0049] In addition, the adsorption and release process of the magnet 1 is simple and quick, and no complicated mechanical connection or bolt fixing is required, which greatly improves the construction efficiency. The magnetic force of the magnet 1 can also be controlled to facilitate portable installation and removal.

[0050] Specifically, see Figure 1 As shown, the bottom support nut 41 includes a nut body 411 and a first sleeve opening 412 and a first threaded pipe opening 413 coaxially and integrally connected on both sides of the nut body 411, wherein the first sleeve opening 412 is suitable for being sleeved on the steel pipe 3, and the first threaded pipe opening 413 is suitable for being threadedly connected to the bottom support screw 42.

[0051] Specifically, the nut body 411, as the core part of the bottom support nut 41, plays a supporting and connecting role. It is the main structure of the entire bottom support nut 41 and provides an installation basis for other components. The first sleeve mouth 412 is suitable for sleeve connection on the steel pipe 3, and its inner diameter matches the outer diameter of the steel pipe 3, and can be tightly sleeved, thereby realizing the fixed connection between the bottom support nut 41 and the steel pipe 3. The first threaded pipe mouth 413 is suitable for threaded connection with the bottom support screw 42, and its internal thread matches the external thread of the bottom support screw 42, and can realize the tightening and adjustment between the two through threaded connection.

[0052] Thus, the sleeve connection between the first sleeve port 412 and the steel pipe 3 enables the bottom support nut 41 to be firmly fixed on the steel pipe 3. This sleeve connection provides stable support through mechanical friction and structural coordination to prevent the bottom support nut 41 from loosening or slipping during use. The threaded connection between the first threaded pipe port 413 and the bottom support screw 42 further enhances the stability of the connection. The threaded connection is self-locking and adjustable, and the degree of tightening between the bottom support nut 41 and the bottom support screw 42 can be adjusted as needed to ensure that the entire structure remains stable when subjected to force.

[0053] As an optimization method of this embodiment, the diameter of the steel pipe 3 is 47-49 mm, which can ensure sufficient load-bearing capacity while avoiding material waste and increased structural complexity caused by an overly large diameter.

[0054] Preferably, the depth of the first sleeve opening 412 determines the contact area between the first sleeve opening 412 and the steel pipe 3. The greater the depth, the greater the contact area between the first sleeve opening 412 and the steel pipe 3, and the greater the friction force, so that the steel pipe can be fixed more firmly. Preferably, the depth of the first sleeve opening 412 in this embodiment is not less than 10 mm to prevent slippage or loosening during the force application process.

[0055] The length of the thread directly affects the strength of the threaded connection. The longer the thread length, the higher the degree of engagement between the threads and the better the stability of the connection. Preferably, the thread length of the first threaded nozzle 413 is not less than 8 mm to prevent the connection from failing due to loose threads during use.

[0056] Preferably, the base 21 is made of a square steel plate. Using a square steel plate to make the base 21 can significantly improve the bearing capacity of the base 21, ensuring that it will not be deformed or damaged when subjected to a large load. For example, in a building support structure, a square steel plate base can stably support the weight of the entire structure. The steel bar bracket 24 is made of steel bars. Using steel bars to make the steel bar bracket 24 can improve the bearing capacity of the bracket, ensuring that it will not be broken or deformed when subjected to a large load.

[0057] Specifically, the plurality of steel bar claws 23 in the embodiment of the present invention are bent to form a ball cage shape, and the steel bar size in the steel bar claws 23 is 5-10 mm, and the number of steel bars is not less than 3. This arrangement ensures strength while also achieving lightweight structure.

[0058] It is understandable that in underground construction, the connector needs to have sufficient strength to withstand external pressure, while also reducing weight as much as possible for easy handling and installation. The design of the steel bar claw 23 strikes a balance between the two.

[0059] See also Figure 2 As shown, an embodiment of the present invention further provides a construction method for an adjustable connector for an underground structure, the construction method comprising the steps of:

[0060] Step S 100 : After the sheet pile support is inserted in place, the foundation pit is excavated so that the sheet pile support becomes the side wall of the foundation pit, and one pole of the magnet 1 is accurately positioned and magnetically attracted to the inner side wall of the sheet pile support that has been firmly inserted and excavated;

[0061] In this step, the accuracy of the initial installation position of the connector is ensured by accurately positioning one pole of the magnet 1 and magnetically attracting it to the inner wall of the sheet pile support. The adsorption effect of the magnet 1 provides a stable fixation to prevent displacement during the subsequent construction process. This precise positioning method can effectively reduce structural instability caused by installation errors and improve the reliability of the entire support system.

[0062] Step S200 : The base 21 of the steel bar claw ball joint 2 is magnetically attracted to the magnet 1, and the hollow sphere 22 and the steel bar claw 23 are combined to form a ball joint structure, so that the angle of the supporting connection can be automatically adjusted according to needs;

[0063] In this step, the design of the ball joint structure provides multi-directional adjustment capabilities, which can adapt to different construction environments and angle requirements. This flexibility enables the connector to better adapt to complex underground structure construction scenarios and improve construction efficiency and quality.

[0064] Step S 300 : Use the bracket 24 to support the steel pipe 3 and ensure that the steel pipe 3 is in a horizontal state. At the same time, accurately insert the bottom support screw 42 of the template end bottom support 4 into the steel pipe 3, and screw the bottom support nut 41 to adjust the length of the supporting connector until the connector can be fully supported on the template end;

[0065] In this step, this adjustment method can achieve precise length adjustment to ensure a tight fit between the connector and the template end. The precise length adjustment capability allows the connector to be fine-tuned according to actual construction needs, ensuring the stability and reliability of the entire support system. This adjustment method is particularly suitable for scenarios that require high-precision installation, such as building template support.

[0066] Step S 400 : The other pole of the magnet 1 is pasted again on the surface of the square support 43 of the template end bottom support 4.

[0067] In this step, the dual magnetic design significantly improves the stability of the connector, especially in dynamic environments or under uneven force conditions, and can effectively prevent the connector from shifting or loosening.

[0068] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An adjustable connector for underground structures, supported and connected between the underground structure formwork and the steel sheet pile support, characterized in that: include: A magnet having a first magnetic pole and a second magnetic pole arranged opposite to each other; A steel pipe, horizontally arranged between the first magnetic pole and the second magnetic pole; A template end base is connected to one end of the steel pipe, and an end of the template end base away from the steel pipe is connected to one of the first magnetic pole and the second magnetic pole; The steel bar claw ball joint is connected to the end of the steel pipe away from the template end bottom support, and the end of the steel bar claw ball joint away from the steel pipe is connected to the other of the first magnetic pole and the second magnetic pole.

2. The adjustable connector for underground structures according to claim 1, characterized in that: The template end base includes a base nut, a base screw and a block support, one end of the base nut is connected to the end of the steel pipe, and the other end is threadedly connected to the end of the base screw, and the end of the base screw away from the base nut is connected to the block support.

3. The adjustable connector for underground structures according to claim 1, characterized in that: The steel bar claw ball joint includes a base, a hollow sphere, a steel bar claw and a bracket. A plurality of the steel bar claws are evenly distributed on the circumference of the base. The hollow sphere is connected to the steel pipe and covered inside the plurality of the steel bar claws. One end of the bracket is connected to the base, and the other end is supported on the outer circumference of the steel pipe.

4. The adjustable connector for underground structures according to claim 1, characterized in that: The magnet is made of neodymium iron boron material.

5. The adjustable connector for underground structures according to claim 2, characterized in that: The base nut includes a nut body and a first sleeve opening and a first threaded pipe opening coaxially and integrally connected on both sides of the nut body. The first sleeve opening is suitable for being sleeved on the steel pipe, and the first threaded pipe opening is suitable for being threadedly connected to the base screw.

6. The adjustable connector for underground structures according to claim 1, characterized in that: The diameter of the steel pipe is 47-49 mm.

7. The adjustable connector for underground structures according to claim 5, characterized in that: The depth of the first sleeve opening is not less than 10 mm, and the thread length of the first threaded pipe opening is not less than 8 mm.

8. The adjustable connector for underground structures according to claim 3, characterized in that: The base is made of a square steel plate, and the steel bar bracket is made of steel bars.

9. The adjustable connector for underground structures according to claim 3, characterized in that: The plurality of steel bar claws are bent to form a ball cage shape, and the steel bar size in the steel bar claws is 5-10 mm, and the number of steel bars is not less than 3.

10. A construction method for an adjustable connector for an underground structure according to any one of claims 1 to 9, characterized in that: The construction method comprises the steps of: Step S 100 : After the sheet pile support is inserted in place, the foundation pit is excavated so that the sheet pile support becomes the side wall of the foundation pit, and one pole of the magnet is accurately positioned and magnetically attracted to the inner side wall of the sheet pile support that has been firmly inserted and excavated; Step S 200 : The base of the steel claw ball joint is magnetically attracted to the magnet, and the hollow sphere and the steel claw are combined to form a ball joint structure, so that the angle of the supporting connector can be automatically adjusted according to needs; Step S 300 : Use the bracket to support the steel pipe and ensure that the steel pipe is in a horizontal state. At the same time, accurately insert the bottom support screw of the template end bottom support into the steel pipe, and screw the bottom support nut to adjust the length of the supporting connector until the connector can be fully supported on the template end; Step S 400 : Stick the other pole of the magnet on the square supporting surface of the base at the template end again.

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