Construction method of double-helix cantilever structure

Abstract

The application discloses a construction method of a double-helix cantilever structure and belongs to the technical field of building construction. The method comprises the following steps: pouring a plurality of cantilever plate modules capable of being spliced to form a double-helix cantilever plate; pouring a core column, installing a climbing track consistent with the spiral shape of the preset double-helix cantilever plate along the side wall of the core column; installing the cantilever plate module at the initial position of the climbing track, sliding the cantilever plate module to detect whether the cantilever plate module can be moved from the initial position to the final position from bottom to top; moving the cantilever plate module at the initial position of the climbing track to a second position, and then installing the cantilever plate module at the initial position of the climbing track, so that the cantilever plate module at the initial position is spliced with the cantilever plate module at the second position until the cantilever plate modules are spliced to form the double-helix cantilever plate; and removing the outer track after pouring the core column. The double-helix cantilever plate is formed by splicing the cantilever plate modules, the construction of the double-helix cantilever plate structure is facilitated, and the problem of on-site pouring construction of the double-helix cantilever plate is solved.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a construction method for a double-helix cantilever structure. Background Technology

[0002] In building structures, there are some irregular concrete structures, especially long cantilevered double-helix thick-shell concrete structures. Due to their high structural height, complex shape of the thick concrete shell, and large cantilever, they pose a great challenge to on-site concrete pouring.

[0003] Therefore, a construction method for a double-helix cantilever structure is needed to solve the above problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a construction method for a double-helix cantilever structure to solve the problem of high construction difficulty of double-helix cantilever slabs in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a construction method for a double-helix cantilever structure, comprising the following steps: S1: According to the shape of the preset double-helix cantilever structure slab, several cantilever slab modules that can be spliced ​​together to form a double-helix cantilever slab are cast using a preset template;

[0007] S2: Cast the core column. After the core column concrete has solidified, install a climbing track along the side wall of the core column that has the same spiral shape as the preset double spiral cantilever plate. The climbing track includes an inner rail installed on the side wall of the core column and an outer rail installed around the core column that cooperates with the inner rail.

[0008] S3: Install the cantilever plate module at the initial position of the climbing track. Slide the cantilever plate module to check if the cantilever plate module can move from the initial position to the final position from bottom to top. If it can, slide the cantilever plate module to the initial position to splice the second cantilever plate module. If it cannot, adjust the climbing track until the cantilever plate can move from the initial position to the final position.

[0009] S4: Splicing cantilever slab module: Move the cantilever slab module located at the initial position of the climbing track to the second position, and then install the cantilever slab module at the initial position of the climbing track, so that the cantilever slab module at the initial position and the cantilever slab module at the second position are spliced ​​together.

[0010] S5: Repeat step S4 until the cantilever modules are spliced ​​together to form a double helix cantilever;

[0011] S6: Erect a template to cover the inner rail on the outer wall of the core column, pour concrete into the template to cover the inner rail to form the core tube, and then remove the outer rail.

[0012] Furthermore, the cantilever plate module is equipped with a connector along the climbing direction, the cantilever plate module has an installation groove on the side away from the connector that mates with the connector, the cantilever plate module has a reserved hole that penetrates the installation groove, and the connector has an installation hole that mates with the reserved hole.

[0013] Furthermore, the process of assembling the cantilever slab modules includes the following steps:

[0014] A1: Apply epoxy resin to the side wall of the cantilever slab module used for splicing on the side of the connector;

[0015] A2: Slide the connector on one cantilever module into the mounting slot on the adjacent cantilever module so that the two adjacent cantilever modules come into contact;

[0016] A3: Pass the connecting steel bars through the reserved holes and the mounting holes to snap the two cantilever slab modules together;

[0017] A4: Pour concrete into the reserved hole to seal it.

[0018] Furthermore, the cantilever plate module is mounted on the climbing track by a fixing mechanism. The fixing mechanism includes a clamping member and a sliding member fixedly connected to the clamping member. The clamping member is used to clamp the cantilever plate module, and the sliding member can slide along the climbing track.

[0019] Furthermore, both the inner and outer rails are provided with multiple sliding grooves arranged along the climbing track. The gap between adjacent sliding grooves on the inner rail is consistent with the length of the cantilever plate module near the inner rail side, and the gap between adjacent sliding grooves on the outer rail is consistent with the length of the cantilever plate module near the outer rail side. A trapezoidal block is slidably installed in the sliding groove, and a spring is connected between the trapezoidal block and the bottom wall of the sliding groove.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention forms a double-helix cantilever slab by splicing cantilever slab modules, which facilitates the construction of the double-helix cantilever slab structure and solves the problem of on-site casting construction of double-helix cantilever slabs; the resulting double-helix cantilever slab structure is stable; through the design of step S3, the construction period, economic losses, and labor cost losses caused by the need to rearrange the climbing track due to the cantilever slab module jamming are avoided; through the design of step S6, the concrete solidifies the inner rail inside the core tube, enabling the inner rail to play a tensile role.

[0022] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0024] Figure 1 This is a flowchart of an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the initial position cantilever plate module installation according to an embodiment of the present invention;

[0026] Figure 3 This is a structural diagram of the cantilever slab module during assembly according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the completed construction of the double-helix cantilever slab structure according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the cantilever slab module assembly according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the installation of the retaining mechanism according to an embodiment of the present invention;

[0030] Figure 7 This is a cross-sectional view of the sliding member in contact state according to an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of the structure of a preset template according to an embodiment of the present invention.

[0032] The following are the markings in the attached diagram: 1. Core column; 2. Climbing track; 201. Inner rail; 202. Outer rail; 3. Pre-set template; 4. Cantilever plate module; 401. Connector; 402. Mounting groove; 403. Reserved hole; 404. Mounting hole; 405. Connecting steel bar; 5. Core tube; 6. Fixing mechanism; 601. Clamping component; 602. Sliding component; 603. Fixing plate; 604. Clamping bottom plate; 605. Clamping top plate; 606. Screw; 7. Slide groove; 701. Trapezoidal block; 702. Spring; 8. Cantilever plate. Detailed Implementation

[0033] like Figures 1-8 As shown, the present invention provides a construction method for a double-helix cantilever structure, comprising the following steps:

[0034] S1: Based on the shape of the preset double helix cantilever structure slab, several cantilever slab modules 4 that can be spliced ​​together to form a double helix cantilever slab are cast through the preset template 3;

[0035] S2: Pour the core column 1. After the concrete of the core column 1 has solidified, install the climbing track 2 along the side wall of the core column 1. The climbing track 2 is consistent with the spiral shape of the preset double spiral cantilever plate. The climbing track 2 is used to support the cantilever plate module 4 and the cantilever plate module 4 to climb along the climbing track 2. The climbing track 2 includes an inner rail 201 installed on the side wall of the core column 1 and an outer rail 202 installed around the core column 1 and cooperating with the inner rail 201.

[0036] S3: Install the cantilever plate module 4 at the initial position of the climbing track 2, slide the cantilever plate module 4 to check whether the cantilever plate module 4 can move from the initial position to the final position from bottom to top. If it can, slide the cantilever plate module 4 to the initial position to splice the second cantilever plate module 4. If it cannot, adjust the climbing track 2 until the cantilever plate 4 can move from the initial position to the final position.

[0037] S4: Splicing cantilever slab module 4: Move the cantilever slab module 4 located at the initial position of the climbing track 2 to the second position, and then install the cantilever slab module 4 at the initial position of the climbing track 2, so that the cantilever slab module 4 at the initial position and the cantilever slab module 4 at the second position are spliced.

[0038] S5: Repeat step S4 until cantilever module 4 is spliced ​​together to form a double helix cantilever;

[0039] S6: Erect a template covering the inner rail 201 on the outer wall of the core column 1, pour concrete into the template to cover the inner rail 201 to form the core tube 5, and then remove the outer rail 202.

[0040] The working principle of the above technical solution is as follows: Figure 4 The double-helix cantilever slab structure includes: a core tube 5 and cantilever slabs 8 connected to the perimeter of the core tube 5. The cantilever slabs 8 are in a double-helix shape. During the construction of the double-helix cantilever slab structure, such as... Figure 1 The first step: Based on the design drawings of the double-helix cantilever slab, multiple cantilever slab modules 4 are cast using a pre-set template 3. These modules 4 are then assembled to form the overall cantilever slab structure. The second step: ... Figure 2The core column 1 is formed by pouring concrete, and the core column 1 is coaxially arranged with the core tube 5. The diameter of the core column 1 is smaller than the diameter of the core tube 5. After the core column 1 is formed, a climbing track 2 is installed on the side wall of the core column 1. The climbing track 2 is set in a double helix shape to cooperate with the double helix cantilever plate. The climbing track 2 includes an inner rail 201 and an outer rail 202. The inner rail 201 is installed on the side wall of the core column 1, and the outer rail 202 is installed on the periphery of the core column 1. The outer rail 202 and the inner rail 201 cooperate. The cantilever plate module 4 is slidably installed between the outer rail 202 and the inner rail 201. The cantilever plate module is supported by the outer rail 202 and the inner rail 201. 4. Both ends provide support and allow the cantilever module 4 to slide; Third step: Check the continuity of the climbing track 2. By installing a cantilever module 4 at the initial position of the climbing track 2, and then sliding the cantilever module 4 from bottom to top, check whether the cantilever module 4 can move from the initial position to the final position. If it can, it means that the continuity of the climbing track 2 is good. If it cannot (getting stuck or not moving smoothly during the sliding process), it means that the spiral continuity of the climbing track 2 is poor, and the position of the climbing track 2 needs to be adjusted; The initial position is the bottom end of the double helix cantilever, and the final position is the top end of the double helix cantilever; Fourth step, such as Figure 3 Step 5: Assemble cantilever slab module 4. Move the cantilever slab module 4 from its initial position a preset distance to its second position. The length of this preset distance along the climbing track 2 is greater than the length of one cantilever slab module 4 along the climbing track 2. Then, install another cantilever slab module 4 at the initial position, so that the adjacent cantilever slab modules 4 are spliced ​​together. Move the two spliced ​​cantilever slab modules 4 again a preset distance, and install another cantilever slab module 4 at the initial position and splice it with the two spliced ​​cantilever slab modules 4 until the cantilever slab modules 4 are spliced ​​together to form a double helix cantilever slab; Step 6: ... Figure 4 A template is erected around the core column 1, with the inner diameter of the template matching the diameter of the core tube 5. The inner rail 201 is located inside the template. Concrete is poured into the template to form the core tube 5. At this time, the core tube 5 connects the inner rail 201 and all the cantilever slab modules 4 into one unit. Finally, the outer rail 202 is removed.

[0041] The beneficial effects of the above technical solution are as follows: By splicing the cantilever slab module 4 to form a double helix cantilever slab, the construction of the double helix cantilever slab structure is facilitated, and the problem of on-site pouring construction of the double helix cantilever slab is solved; and the formed double helix cantilever slab structure is stable; through the design of step S3, the construction period loss, economic loss and labor cost loss caused by the need to rearrange the climbing track 2 due to the cantilever slab module 4 being stuck during the construction process are avoided; through the design of step S6, the concrete is used to solidify the inner rail 201 inside the core tube 5, so that the inner rail 201 can play a tensile role.

[0042] In one embodiment of the present invention, a connector 401 along the climbing direction is installed on the cantilever plate module 4, and an installation groove 402 that mates with the connector 401 is provided on the side of the cantilever plate module 4 away from the connector 401. A reserved hole 403 that penetrates the installation groove 402 is provided on the cantilever plate module 4, and an installation hole 404 that mates with the reserved hole 403 is provided on the connector 401.

[0043] When assembling cantilever slab module 4, the following steps are included:

[0044] A1: Apply epoxy resin to the side wall of one of the cantilever modules 4 located on the connector 401;

[0045] A2: The two cantilever plate modules 4 are slid into the mounting groove 402 through the connector 401, so that they come into contact.

[0046] A3: Pass the connecting steel bar 405 through the reserved hole 403 and the mounting hole 404 to snap the two cantilever slab modules 4 together;

[0047] A4: Pour concrete into the reserved hole 403 to seal the reserved hole 403.

[0048] The working principle of the above technical solution is as follows: Figure 5 When splicing the cantilever slab module 4, epoxy resin is applied to the splicing surface of the cantilever slab module 4, and then it is connected to the mounting groove 402 through the connector 401. Then, the two adjacent cantilever slab modules 4 are spliced ​​into one piece by passing the connecting steel bar 405 through the reserved hole 403 and the mounting hole 404. Finally, the reserved hole 403 is sealed with concrete.

[0049] The beneficial effects of the above technical solution are as follows: by coating the cantilever slab modules 4 with epoxy resin before splicing, gaps between adjacent cantilever slab modules 4 are avoided, and the epoxy resin bonding of adjacent cantilever slab modules 4 ensures the stability of the splicing; by setting the connector 401 to cooperate with the mounting groove 402, it is easy to align and splice adjacent cantilever slab modules 4, and the connector 401 can also play a supporting role; by using the connecting steel bar 405 to pass through the reserved hole 403 and the mounting hole 404, the splicing of adjacent cantilever slab modules 4 is more stable; by pouring concrete into the reserved hole 403, the sealing of the formed double helix cantilever slab structure is ensured.

[0050] In one embodiment of the present invention, the cantilever plate module 4 is mounted on the climbing track 2 by a fixing mechanism 6. The fixing mechanism 6 includes a clamping member 601 and a sliding member 602 fixedly connected to the clamping member 601. The clamping member 601 is used to clamp the cantilever plate module 4, and the sliding member 602 can slide along the climbing track 2. The clamping member 601 includes a fixing plate 603, a clamping bottom plate 604 fixedly connected to the fixing plate 603, and a clamping top plate 605 slidably connected to the fixing plate 603. The clamping bottom plate 604 and the clamping top plate 605 are connected by screws 606. Rotating the screws 606 can make the clamping top plate 605 move closer to or away from the clamping bottom plate 604.

[0051] The working principle of the above technical solution is as follows: Figure 6 After the cantilever plate module 4 is clamped by the clamping member 601, the cantilever plate module 4 together with the fixing mechanism 6 is installed on the climbing track 2, and the cantilever plate module 4 is raised by sliding the sliding member 602.

[0052] The beneficial effects of the above technical solution are as follows: by setting the fixing mechanism 6, the cantilever plate module 4 is prevented from sliding directly and causing damage to the cantilever plate module 4, and by setting the clamping part 601, the installation and disassembly of the cantilever plate module 4 are facilitated.

[0053] In one embodiment of the present invention, the climbing track 2 is provided with a plurality of sliding grooves 7 arranged along the climbing track 2, and a trapezoidal block 701 is slidably installed in the sliding groove 7. A spring 702 is connected between the trapezoidal block 701 and the bottom wall of the sliding groove 7. The gap between adjacent sliding grooves on the inner rail 201 is consistent with the length of the cantilever plate module 4 near the inner rail 201, and the gap between adjacent sliding grooves on the outer rail 202 is consistent with the length of the cantilever plate module 4 near the outer rail 202.

[0054] The working principle of the above technical solution is as follows: Figure 7 When the sliding cantilever plate module 4 is slidable, the sliding member 602 slides along the inclined side of the trapezoidal block 701 and presses the trapezoidal block 701, so that the trapezoidal block 701 slides into the slide groove 7. At this time, the spring 702 is compressed. After the sliding member 602 slides past the trapezoidal block 701, the trapezoidal block 701 slides out of the slide groove 7 under the action of the elastic potential energy of the spring 702. At this time, the right-angled side of the trapezoidal block 701 abuts against the sliding member 602.

[0055] The beneficial effects of the above technical solution are as follows: by setting trapezoidal blocks 701 to abut against the sliding member 602, the cantilever slab module 4 is prevented from sliding downward due to gravity during the spiral ascent of the cantilever slab module 4; by setting multiple trapezoidal blocks 701 along the climbing track 2, each cantilever slab module 4 can be abutted by the corresponding trapezoidal block 701, preventing the accumulation of too many cantilever slab modules 4 from exceeding the load-bearing capacity of the trapezoidal blocks 701; and manpower is saved in the process of splicing the cantilever slab module 4, ensuring the stability of the splicing process.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A method of constructing a double helix cantilever structure, characterized by, The method comprises the following steps: S1: according to the shape of the preset double-helix cantilever structure plate, pouring a plurality of cantilever plate modules capable of being spliced to form a double-helix cantilever plate through a preset formwork; S2: pouring a core column, after the core column concrete solidifies, installing a climbing track consistent with the spiral shape of the preset double-helix cantilever plate along the side wall of the core column, the climbing track comprising an inner rail installed on the side wall of the core column and an outer rail installed on the side of the core column and matched with the inner rail; S3: installing a cantilever plate module at the initial position of the climbing track, sliding the cantilever plate module to detect whether the cantilever plate module can be moved from the initial position to the final position from bottom to top, if yes, sliding the cantilever plate module to the initial position to splice the second cantilever plate module, if not, adjusting the climbing track until the cantilever plate can be moved from the initial position to the final position; S4: splicing the cantilever plate modules: moving the cantilever plate module at the initial position of the climbing track to a second position, and then installing a cantilever plate module at the initial position of the climbing track, so that the cantilever plate module at the initial position is spliced with the cantilever plate module at the second position; S5: repeating step S4 until the cantilever plate modules are spliced to form a double-helix cantilever plate; S6: erecting a formwork covering the inner rail on the outer side wall of the core column, and pouring concrete into the formwork to cover the inner rail to form a core tube, and then removing the outer rail.

2. The construction method of a double-helix cantilever structure according to claim 1, characterized in that: The cantilever plate module is provided with a connecting piece in the climbing direction, and a mounting groove matched with the connecting piece is arranged on the side of the cantilever plate module away from the connecting piece. The cantilever plate module is provided with a reserved hole penetrating through the mounting groove, and the connecting piece is provided with a mounting hole matched with the reserved hole.

3. The construction method of a double-helix cantilever structure according to claim 2, characterized by, When the cantilever plate modules are spliced, the following steps are included: A1: applying epoxy resin on the side wall of the cantilever plate module on the side of the connecting piece; A2: sliding the connecting piece on one cantilever plate module into the mounting groove on the adjacent cantilever plate module, so that the two adjacent cantilever plate modules are in contact; A3: inserting a connecting steel bar through the reserved hole and the mounting hole to connect the two cantilever plate modules; A4: pouring concrete into the reserved hole to close the reserved hole.

4. The construction method of a double-helix cantilever structure according to claim 1, characterized in that: The cantilever plate module is installed on the climbing track through a retaining mechanism, the retaining mechanism comprising a clamping piece and a sliding piece fixedly connected with the clamping piece, the clamping piece being used for clamping the cantilever plate module, and the sliding piece being capable of sliding along the climbing track.

5. The construction method of a double helix cantilever structure according to claim 1, characterized in that: The inner rail and the outer rail are both provided with a plurality of sliding grooves arranged along the climbing track, the gap between adjacent sliding grooves on the inner rail is consistent with the length of the side of the cantilever plate module close to the inner rail, the gap between adjacent sliding grooves on the outer rail is consistent with the length of the side of the cantilever plate module close to the outer rail, a trapezoidal block is slidingly installed in the sliding groove, and a spring is connected between the trapezoidal block and the bottom wall of the sliding groove.

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