Round concrete wall steel frame wood pattern system, reducing transformation method and construction method

Abstract

The invention discloses a circular concrete wall steel frame wood formwork system, a reducing transformation method and a construction method.The circular concrete wall steel frame wood formwork system comprises a plurality of sets of outer side steel frame wood formworks and a plurality of sets of inner side steel frame wood formworks, each outer side steel frame wood formwork comprises an outer side steel frame part and an outer side wood panel part, the outer side wood panel parts are attached to the outer wall of a to-be-formed concrete wall, and the outer side steel frame parts are connected with the outer side wood panel parts. The outer side steel frame part is installed on the side, away from a to-be-formed concrete wall, of the outer side wood panel part, the arc length of the outer side wood panel part is larger than that of the outer side steel frame part, the inner side steel frame wood formwork comprises an inner side steel frame part and an inner side wood panel part, and the inner side wood panel part is attached to the inner wall of the to-be-formed concrete wall. By adjusting the structures of the inner and outer steel frame wood formworks, the optimized formwork system can be rapidly turned over in the diameter changing process, the formwork disassembly and reinstallation time is shortened, the transformation time and the construction period are greatly shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a circular concrete wall steel frame wooden formwork system, a diameter-changing transformation method and a construction method. Background Art

[0002] With the continuous development of modern construction projects such as silos and industrial buildings, circular concrete structures have been widely used due to their unique mechanical properties and spatial advantages. This structure can evenly distribute pressure and effectively reduce stress concentration, thereby significantly improving the durability of the structure while meeting the needs of large-span and large-space buildings. However, in actual construction, the selection of formwork for circular concrete components has always been a technical problem.

[0003] At present, circular concrete components are often reinforced with prefabricated steel formwork. Although steel formwork has high strength and rigidity, its material cost is high, the reuse rate is low, and the molding effect is difficult to guarantee, which to a certain extent limits its wide application. On the other hand, for structures with high requirements for concrete molding effect, wooden formwork is usually used. However, wooden formwork has obvious shortcomings in the reinforcement of circular structures and it is difficult to meet complex construction requirements. In order to solve the above problems, steel frame wooden formwork came into being. This formwork system combines the advantages of steel formwork and wooden formwork, which can not only ensure the appearance quality of concrete, but also realize prefabrication and assembly, thereby effectively saving construction time, and the arc molding effect is good. However, steel frame wooden formwork still faces a key problem in practical application: when the circular structure needs to change diameter, it is difficult to achieve rapid turnover and transformation of steel frame wooden formwork, which not only increases construction costs but also reduces construction efficiency. Summary of the invention

[0004] The purpose of the present invention is to address the problems existing in the prior art and provide a circular concrete wall steel frame wood formwork system, comprising a plurality of groups of outer steel frame wood formworks and a plurality of groups of inner steel frame wood formworks, the outer steel frame wood formworks comprising outer steel frame members and outer wood panel members, the outer wood panel members being attached to the outer wall of the concrete wall to be formed, the outer steel frame members being installed on the side of the outer wood panel members away from the concrete wall to be formed, the arc length of the outer wood panel members being greater than the arc length of the outer steel frame members, the inner steel frame wood formworks comprising inner steel frame members and inner wood panel members, the inner wood panel members being attached to the inner wall of the concrete wall to be formed, the inner steel frame members being installed on the side of the inner wood panel members away from the concrete wall to be formed, the arc length of the inner steel frame members being matched with the arc length of the inner wood panel members, wooden beams are filled between the circumferentially adjacent outer steel frame members, and small steel frame wood formworks are installed between the circumferentially adjacent inner steel frame wood formworks.

[0005] By adopting the above technical solution, wooden beams are filled between the outer steel frame wooden formworks, and small steel frame wooden formworks are installed between the inner steel frame wooden formworks, so that the formwork system can flexibly adapt to various diameter changes of the concrete wall such as the outer diameter is reduced and the inner diameter is expanded, and has a wide range of applicability.

[0006] Furthermore, the wooden beam is fixed between circumferentially adjacent outer steel frame members by connecting bolts, and the thickness of the wooden beam is matched with the thickness of the outer steel frame members.

[0007] Furthermore, the small steel frame wooden formwork includes a small wooden panel member and a small steel frame member, and the small steel frame wooden formwork is connected and fixed to the inner steel frame wooden formwork by self-tapping screws.

[0008] Furthermore, the number of the inner steel frame wooden formworks is the same as the number of the outer steel frame wooden formworks, the outer steel frame members and the outer wooden panel members are fixed to each other by self-tapping screws, the inner steel frame members and the inner wooden panel members are fixed to each other by self-tapping screws, the circumferentially opposite outer steel frame members and the inner steel frame members are connected and fixed by tension screws, and the circumferentially and axially adjacent outer steel frame members and the circumferentially and axially adjacent inner steel frame members are all fixed by bolts.

[0009] By adopting the above technical solution, the stability of the entire formwork system after connection can be ensured, avoiding problems such as formwork deformation or leakage caused by loose connections during concrete pouring, thereby improving construction quality.

[0010] The present application also provides a diameter-changing transformation method for a circular concrete wall steel frame wood formwork system, when the outer diameter of the concrete wall to be formed is reduced during the upward construction process, the two ends of the outer wood panel member are cut according to the diameter information of the outer side of the concrete wall to be formed after the diameter is changed, and at the same time, wooden beams of corresponding sizes are filled between the circumferentially adjacent outer steel frame members, the arc length of the wooden beam is the difference between the arc length of the outer wood panel member after the concrete wall to be formed is changed and the arc length of the outer wood panel member before the diameter is changed, and the length of the two ends of the outer wood panel member is half of the difference between the arc length of the outer wood panel member after the concrete wall to be formed is changed and the arc length of the outer wood panel member before the diameter is changed; When the inner diameter of the concrete wall to be formed expands during the upward construction process, small steel frame wooden formworks of corresponding sizes are filled between the inner steel frame wooden formworks according to the diameter information of the inner diameter of the concrete wall to be formed after the diameter change, and the arc length of the small steel frame wooden formworks is the difference between the arc length of the inner wooden panel after the diameter change of the concrete wall to be formed and the arc length of the inner wooden panel before the diameter change.

[0011] By adopting the above technical solution, it is possible to quickly adapt to the situation where the outer diameter of the concrete wall is reduced and the inner diameter is expanded, without the need for large-scale dismantling and reinstalling the formwork, greatly shortening the transformation time and construction period, reducing the time for dismantling and reinstalling the formwork, and enabling the formwork system to achieve rapid turnover during the diameter change process, thereby improving construction efficiency and reducing construction costs.

[0012] Furthermore, the arc length of the wooden beam is: ; in, is the arc length of the wooden beam used after the jth diameter change of the outer diameter of the concrete wall to be formed; The arc length of the outer wood panel after the outer diameter of the concrete wall to be formed is the jth diameter change; is the diameter of the concrete wall to be formed after the jth diameter change; is the number of outer wood panel pieces and is rounded up; j is the number of times the outer diameter of the concrete wall to be formed is reduced, j 2, is the cutting length of the outer diameter of the concrete wall to be formed at both ends of the outer wood panel after the jth reduction.

[0013] Furthermore, the arc length of the small steel frame wooden formwork is: ; in, The arc length of the small steel frame wooden formwork used for the jth expansion of the concrete wall to be formed, is the arc length of the inner wooden panel after the jth diameter change of the inner side of the concrete wall to be formed; is the diameter of the inner side of the wall after the jth diameter change; This is the number of outside wood panel pieces, rounded up.

[0014] Further, the calculation method of the arc length of the outer steel frame member includes determining the chord length of the corresponding arc according to the minimum value of the outer diameter variable diameter of the concrete wall to be formed and the number of the outer wooden panel members; Determine the center angle corresponding to half the sum of the maximum and minimum values ​​of the outer diameter variable diameter of the concrete wall to be formed according to the obtained chord length; The arc length corresponding to the outer steel frame member when the outer diameter of the concrete wall to be formed is half the sum of the maximum and minimum values ​​is determined by the obtained central angle of the circle.

[0015] By adopting the above technical solution, the outer steel frame can better adapt to the changes in the outer diameter of the wall, further improving the flexibility and adaptability of the outer steel frame.

[0016] Furthermore, the calculation method of the arc length of the inner steel frame member determines the chord length of the corresponding arc according to the minimum value of the variable diameter of the inner diameter of the concrete wall to be formed and the number of the inner wooden panel members; Determine the center angle corresponding to half the sum of the maximum and minimum values ​​of the variable diameter of the inner diameter of the concrete wall to be formed according to the obtained chord length; The arc length corresponding to the inner steel frame member when the inner diameter of the concrete wall to be formed is half the sum of the maximum value and the minimum value is determined by the obtained center angle.

[0017] By adopting the above technical solution, the inner steel frame can better adapt to the changes in the outer diameter of the wall, further improving the flexibility and adaptability of the inner steel frame.

[0018] The present application also provides a construction method for a circular concrete wall steel frame wood formwork system, wherein the size information of the outer steel frame wood formwork, the inner steel frame wood formwork, the wood beam and the small steel frame wood formwork is determined according to the diameter variation information of the inner and outer sides of the concrete wall to be formed and the size of the standard wood panel member, and the drawings are designed and produced according to the above information; According to the above drawings, make the outer steel frame wooden formwork, the inner steel frame wooden formwork, the wooden beams and the small steel frame wooden formwork; During construction, the inner steel frame wooden formwork is first installed on the inner side of the concrete wall to be formed by a tower crane, and then the outer steel frame wooden formwork is installed on the outer side of the concrete wall to be formed by a tower crane, and wooden beams of corresponding sizes are filled between the circumferentially adjacent outer steel frame members; When the outer diameter of the concrete wall to be formed changes, the two ends of the outer wooden panel are cut to corresponding lengths and filled with wooden beams of corresponding sizes according to the construction drawings. When the inner diameter of the concrete wall to be formed changes, small steel frame wooden templates of corresponding sizes are filled between the inner steel frame wooden templates according to the construction drawings. Finally, the modified outer steel frame wooden templates and inner steel frame wooden templates are installed on the concrete wall to be formed after the change in diameter.

[0019] By adopting the above technical solution, when laying the formwork system for the concrete wall to be formed, the outer steel frame wooden formwork and the inner steel frame wooden formwork can be quickly transformed and turned over according to the diameter change range, thereby improving the construction efficiency.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention proposes a circular concrete wall steel frame wood formwork system, a diameter-changing transformation method and a construction method. By adjusting the structure of the inner and outer steel frame wood formworks, the inner steel frame wood formwork can quickly adapt to the change of the inner diameter of the wall by adding a small steel frame wood formwork, while the outer steel frame wood formwork can quickly adapt to the change of the outer diameter of the wall by cutting wooden panel parts and filling wooden beams. As a result, the optimized formwork system can achieve rapid turnover during the diameter-changing process, reducing the time for disassembly and reinstallation of the formwork, greatly reducing the transformation time and construction period, and improving construction efficiency.

[0021] 2. The present invention proposes a circular concrete wall steel frame wooden formwork system, a diameter-changing transformation method and a construction method. The present invention is particularly aimed at the multiple diameter-changing requirements of circular concrete walls and can flexibly adapt to changes in the diameter of the wall. Whether the outer diameter becomes smaller or the inner diameter becomes larger, rapid adjustment can be achieved through simple transformation. The method is applicable to a variety of circular concrete structures, such as silos, industrial buildings, etc., and has wide applicability.

[0022] 3. The present invention proposes a circular concrete wall steel frame wood formwork system, a diameter-changing transformation method and a construction method. By accurately calculating the arc length of the wood panel member, it can not only adapt to the multiple diameter-changing requirements of the circular concrete wall and ensure that each wood panel member can be fully utilized, but also reduce the cutting waste caused by size mismatch. By accurately calculating the arc length of the steel frame member, it can adapt to the multiple diameter-changing requirements of the circular concrete wall. At the same time, when the diameter of the concrete wall is the largest and smallest, it can reduce the concave and convex conditions of the outer wood panel member and the inner wood panel member after splicing, increase the overall flatness of the concrete wall after forming, thereby significantly improving the utilization rate of wood and steel and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the combination of the inner steel frame wooden formwork, the outer steel frame wooden formwork, the wooden beam and the small steel frame wooden formwork of the present invention; Figure 2 It is a schematic diagram of the construction method of the present invention; Figure 3 It is a schematic diagram of the diameter-changing process of filling the wooden beams of the outer steel frame wooden formwork of the present invention; Figure 4 It is a schematic diagram of the diameter-changing process of installing the small steel frame wooden template on the inner steel frame wooden template of the present invention; Figure 5 It is a schematic elevation diagram of the outer steel frame wooden formwork assembly of the present invention; Figure 6 This is a schematic diagram of another viewing angle of the outer steel frame wooden formwork of the present invention; Figure 7 It is a vertical schematic diagram of the inner steel frame wooden formwork assembly of the present invention; Figure 8This is a schematic diagram of another viewing angle of the inner steel frame wooden formwork of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional change when the diameter of the concrete wall of the present invention changes.

[0024] In the figure: 1. Inner wooden panel; 2. Inner steel frame; 3. Outer wooden panel; 4. Outer steel frame; 5. Wooden beam; 6. Small steel frame wooden formwork. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. 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.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] See also Figure 1 , Figure 6 and Figure 8 The specific scheme of the embodiment is as follows: a circular concrete wall steel frame wood formwork system includes multiple groups of outer steel frame wood formworks and multiple groups of inner steel frame wood formworks, the outer steel frame wood formworks include outer steel frame members 4 and outer wood panel members 3, the outer wood panel members 3 are attached to the outer wall of the concrete wall to be formed, the outer steel frame members 4 are installed on the side of the outer wood panel members 3 away from the concrete wall to be formed, the arc length of the outer wood panel members 3 is greater than the arc length of the outer steel frame members 4, the inner steel frame wood formworks include inner steel frame members 2 and inner wood panel members 1, the inner wood panel members 1 are attached to the inner wall of the concrete wall to be formed, the inner steel frame members 2 are installed on the side of the inner wood panel members 1 away from the concrete wall to be formed, the arc length of the inner steel frame members 2 is adapted to the arc length of the inner wood panel members 1, wooden beams 5 are filled between circumferentially adjacent outer steel frame members 4, and small steel frame wood formworks 6 are installed between circumferentially adjacent inner steel frame wood formworks.

[0028] The wooden beams 5 are fixed between the circumferentially adjacent outer steel frame members 4 and between the circumferentially adjacent outer wooden panel members 3 by connecting bolts, so as to improve the sealing effect after the outer wooden panel members 3 are spliced.

[0029] In addition, the thickness of the wooden beam 5 is matched with the thickness of the outer steel frame 4, and the number of the inner steel frame wooden formwork is the same as the number of the outer steel frame wooden formwork.

[0030] In this embodiment, the small steel frame wooden formwork 6 is connected and fixed to the inner steel frame wooden formwork by self-tapping screws, the number of inner steel frame wooden formworks is the same as the number of outer steel frame wooden formworks, the outer steel frame member 4 and the outer wooden panel member 3 are fixed by self-tapping screws, and the inner steel frame member 2 and the inner wooden panel member 1 are fixed by self-tapping screws.

[0031] Specifically: the small steel frame wooden formwork 6 includes a small wooden panel member and a small steel frame member, the arc lengths of the small wooden panel member and the small steel frame member are adapted to each other, the outer steel frame member 4, the inner steel frame member 2 and the small steel frame member are composed of arc-shaped horizontal frames, vertical frames, rectangular steel pipe vertical ribs, arc-shaped steel plate ring ribs, steel plate cover plates and angle steels, among which the vertical frames of the outer steel frame member 4 adopt angle steels with dimensions of 63mm×100mm×8mm, and the vertical frames of the inner steel frame member 2 and the small steel frame member adopt steel plates with dimensions of δ10mm×100mm.

[0032] In addition, the circumferentially opposite outer steel frame members 4 and inner steel frame members 2 are connected and fixed by tension screws, the circumferentially and axially adjacent outer steel frame members 4 and circumferentially and axially adjacent inner steel frame members 2 are fixed by bolts, and the small steel frame members are connected and fixed to the inner steel frame members 2 by self-tapping screws.

[0033] Meanwhile, the outer wood panel member 3, the inner wood panel member 1 and the small wood panel member are preferably double-sided film-faced plywood.

[0034] See also Figure 2 The present application also provides a construction method of a circular concrete wall steel frame wooden formwork system, comprising the following steps: Step 1: According to the size of the market standard wood panel members and the diameter change information of the concrete wall to be formed during the diameter change process, determine the number of outer wood panel members 3, the arc length of the outer wood panel members 3 and the inner wood panel members 1, the arc length of the wooden beams 5 filled in each diameter change, and the arc length of the small steel frame wooden formwork 6; then, according to the maximum and minimum values ​​of the outer diameter change and the maximum and minimum values ​​of the inner diameter change during the diameter change process of the concrete wall to be formed, respectively determine the arc length of the outer steel frame member 4 and the arc length of the inner steel frame member 2; obtain and make drawings based on the above information.

[0035] Specifically: ① Determination of the arc length of the outer wood panel member 3 In order to reduce the waste of cutting wood panel parts, the longest side of the standard wood panel parts on the market is used as the reference of the arc length of the wood panel parts 3 on the outside of the concrete wall to be formed. Assuming that the longest side of the standard wood panel parts on the market is B, B is first used to calculate the initial number m of wood panel parts required for the outside of the concrete wall to be formed. In order to ensure that the circle is assembled from standard wood panel parts with uniform arc length, the calculated number m is rounded up, and then the arc length of the outer wood panel parts 3 is reversed.

[0036] Wherein: m is the initial number of standard wood panel pieces required for the outermost layer of the concrete wall to be formed; a is the diameter of the outer edge of the concrete wall to be formed; and B is the arc length of the standard wood panel pieces on the market.

[0037] Round m upward to get the number m of the outer wood panel member 3, and then calculate the arc length of the outer wood panel member 3:

[0038] Among them: B outer mark is the arc length of the outer wooden panel member 3; m mark is the number of the outer wooden panel members 3; a is the diameter of the outer edge line of the concrete wall to be formed.

[0039] ②Determination of arc length of steel frame Arc length of outer steel frame 4: In this embodiment, the calculation method of the arc length of the outer steel frame member 4 includes determining the chord length of the corresponding arc according to the minimum value of the outer diameter change of the concrete wall to be formed and the number of the outer wooden panel members 3. Specifically: Assume that the maximum diameter of the outer diameter of the concrete wall to be formed is a, and the minimum diameter is an. The chord length corresponding to the arc with the minimum outer diameter of the concrete wall to be formed being an is doutside. According to the cosine theorem:

[0040] in, is the number of outer wood panel pieces 3.

[0041] It is worth noting that the number of the inner steel frame wood formwork 11 is the same as the number of the outer steel frame wood formwork 10, so the number of the outer wood panel members 3 and the inner wood panel members 1 is the same; According to the obtained chord length, the central angle corresponding to half of the sum of the maximum and minimum values ​​of the outer diameter of the concrete wall to be formed is determined. Specifically: Because the chord length of the outer steel frame member 4 remains unchanged, the chord length corresponding to the arc with the minimum outer diameter of the concrete wall to be formed is also equal to the chord length when the arc diameter is ((a+an) / 2). Assuming that the central angle of the arc diameter ((a+an) / 2) is θout, then:

[0042] The central angle θ of the outer steel frame 4 corresponding to the arc diameter of the concrete wall to be formed can be calculated as follows:

[0043] The arc length corresponding to the outer steel frame member 4 when the outer diameter of the concrete wall to be formed is half of the sum of the maximum and minimum values ​​is determined by the obtained central angle of the circle. Specifically: Assuming the arc length of the outer steel frame 4 is lout, then: Arc length of inner steel frame 2: In this embodiment, the calculation method of the arc length of the inner steel frame member 2 is to determine the chord length of the corresponding arc according to the minimum value of the inner diameter of the concrete wall to be formed and the number of the inner wooden panel members 1. Specifically: Assume that the maximum diameter of the inner diameter of the concrete wall to be formed is bn, and the minimum diameter is b. Assume that the chord length of the arc corresponding to the minimum inner diameter of the concrete wall to be formed is dinside, then according to the cosine theorem:

[0044] in, is the number of outer wood panel pieces 3.

[0045] According to the obtained chord length, the central angle corresponding to half of the sum of the maximum and minimum values ​​of the inner diameter of the concrete wall to be formed is determined. Specifically: Because the chord length of the inner steel frame 2 remains unchanged, the chord length corresponding to the arc when the inner diameter of the concrete wall to be formed is the smallest b is also equal to the chord length when the arc diameter is ((b+bn) / 2). Assuming that the central angle of the arc diameter ((b+bn) / 2) is θin, then:

[0046] It can be calculated that the concrete wall to be formed is within the central angle θ corresponding to the arc diameter ((b+bn) / 2):

[0047] The arc length corresponding to the inner steel frame member 2 when the inner diameter of the concrete wall to be formed is half of the sum of the maximum and minimum values ​​is determined by the obtained central angle of the circle. Specifically: Assuming the arc length l of the inner steel frame 2, then:

[0048] When designing the inner steel frame 2 and the outer steel frame 4, it is necessary to consider the turnover performance of the concrete wall to be formed under the condition of variable diameter and the flatness of the concrete wall after forming. Specifically, if only the maximum diameter of the concrete wall to be formed when the diameter is changed is used as the design basis, although the surface of the concrete wall after forming is close to a perfect circle at the maximum diameter, at the minimum diameter, the concave phenomenon of the wall caused by the inner chord height of each outer wooden panel member 3 and the inner wooden panel member 1 will be more obvious. On the contrary, if only the minimum diameter is used as the design basis, the surface of the concrete wall after forming is a perfect circle at the minimum diameter, but at the maximum diameter, the convex phenomenon of the wall caused by the inner chord height of each outer wooden panel member 3 and the inner wooden panel member 1 will be more obvious; In order to minimize the concave and convex phenomena of the outer wooden panel member 3 and the inner wooden panel member 1 after splicing, thereby improving the overall flatness of the concrete wall after forming, the design and production of the inner steel frame member 2 and the outer steel frame member 4 should be based on the median of the maximum diameter and the minimum diameter of the concrete wall to be formed when the diameter changes. In this way, the chord height difference between the outer wooden panel member 3 and the inner wooden panel member 1 after splicing can be effectively reduced, thereby reducing the concave and convex phenomena, and making the surface of the concrete wall after forming smoother.

[0049] ③Highly determined According to the minimum height of the concrete wall to be cast As the height of the inner steel frame wood formwork 11 and the outer steel frame wood formwork 10 The design basis is = From bottom to top, the height of the second inner steel frame wooden formwork 11 and the outer steel frame wooden formwork 10 is the height of the second concrete wall casting to be formed minus the height of the previous concrete wall casting to be formed. The height after is taken as the design basis, that is = - The height of the third inner steel frame wooden formwork 11 and the outer steel frame wooden formwork 10 is the height of the third concrete wall to be formed minus the height of the second concrete wall to be formed, that is, = - .

[0050] And so on, that is:

[0051] in: is the height of the nth inner steel frame wood formwork 11 and the outer steel frame wood formwork 10; is the pouring height of the concrete wall to be formed for the nth time; is the pouring height of the concrete wall to be formed for the n-1th time; It is worth noting that the above height determination method is a theoretical calculation process. In the project, it can be comprehensively considered based on factors such as the actual height of the concrete wall.

[0052] Step 2: According to the drawings, steel plates, rectangular tubes and other materials are precisely cut, and then welded and assembled into outer steel frame members 4, inner steel frame members 2 and small steel frame members. Angle steels with a size of 30mm×30mm×3mm are cut into 40mm long, and self-tapping screw holes are opened. They are welded to the steel frame at a certain interval to form panel fixing points. According to the deepening processing size, the outer wooden panel members 3, the inner wooden panel members 1 and the small wooden panel members are cut to the required size, and connected to the corresponding outer steel frame members 4, inner steel frame members 2 and small steel frame members through self-tapping screws to form a whole. For the inner steel frame wooden formwork 11 and the small steel frame wooden formwork 6, the inner wooden panel member 1 is adapted to the arc length of the inner steel frame member 2, and the sides are as flush as possible. For the small steel frame wooden formwork 6, the small wooden panel member is adapted to the arc length of the small steel frame member, and the sides are as flush as possible.

[0053] Among them, Figure 5 and Figure 7As shown, the outer steel frame 4 and the inner steel frame 2 are first surrounded by an arc-shaped horizontal frame and a vertical frame to form a frame. The horizontal frame adopts a δ10mm×100mm steel plate, the vertical frame of the outer steel frame 4 adopts an angle steel with a size of 63mm×100mm×8mm, and the vertical frame of the inner steel frame 2 adopts a δ10mm×100mm steel plate. The arc-shaped horizontal frame is precisely cut and formed according to the arc line. The arc-shaped steel plate ring rib adopts a δ10mm×100mm steel plate arranged horizontally, with a spacing of no more than 600mm, and the arc-shaped steel plate ring rib is set throughout the length; the rectangular steel pipe vertical rib adopts a 100mm×50mm×3mm rectangular pipe arranged vertically, and the rectangular pipe vertically adopts a double rectangular pipe with a gap of 60mm, which is mainly used to reserve a gap for the tension screw rod and to fix the tension screw rod end steel plate; the distance between the double rectangular pipes is no more than 600mm, and a double rectangular pipe is set in the middle of the double rectangular pipes. A single rectangular tube is used, and the vertical ribs of the rectangular steel tube are disconnected at the arc-shaped steel plate ring rib and welded to the arc-shaped steel plate ring rib. The tension screw adopts a φ9.8 reinforced five-section special tension screw. The tension screw hole is designed to be an 18mm diameter hole. The horizontal spacing is the same as the main rib, and the vertical spacing is 600mm. The first bottom is 300mm above the ground, and the joint position of the outer wooden panel member 3 and the inner wooden panel member 1 needs to be left at the arc-shaped steel plate ring rib position of the outer steel frame member 4 and the inner steel frame member 2. 3mm steel plate covers are added on both sides of the upper and lower sides of the arc-shaped steel plate ring rib at the joint position of the outer wooden panel member 3 and the inner wooden panel member 1. One end of the angle steel and δ3mm×100mm steel plate cover with a size of 30mm×30mm×3mm are welded to the steel frame rectangular tube or steel plate, and the other end is connected to the corresponding outer wooden panel member 3 or inner wooden panel member 1 through self-tapping screws, so that the steel frame and the wooden panel member form a whole.

[0054] Step 3: When used on site, the inner steel frame wood formwork 11 and the outer steel frame wood formwork 10 are spliced ​​according to the vertical height, and the tower crane is lifted to the corresponding position for installation. The inner steel frame wood formwork 11 is installed first, and then the outer steel frame wood formwork 10 is installed. The circumferentially adjacent outer steel frame members 4 and the circumferentially adjacent inner steel frame members 2 are connected with bolts; In addition, the circumferentially adjacent outer steel frame members 4 are first filled with wooden beams 5 of corresponding arc length before connecting the bolts. The length of the outer bolts should meet the requirements of twice the thickness of the vertical frame plus the arc length of the wooden beam 5 plus the nut, and the thread head should be exposed with a length that meets the requirements of the specification.

[0055] Step 4: Quick transformation method of concrete wall diameter change: like Figure 3 and Fig. 9 As shown, Figure 3 From c to a in the figure, it is a schematic diagram showing the changes of the outer steel frame wood formwork 10 and the wood beam 5 when the outer diameter of the concrete wall to be formed shrinks. When the outer diameter of the concrete wall to be formed shrinks, both ends of the outer wood panel 3 are cut to a certain length and filled with wood beams 5 of corresponding size; When the outer diameter of the concrete wall to be formed is reduced, the cutting lengths at both ends of the outer wood panel member 3 are calculated by the following formula:

[0056] in, is the cutting length of the outer diameter of the concrete wall to be formed at both ends of the outer wood panel member 3 after the jth diameter reduction; is the arc length of the wooden beam 5 used after the jth diameter change of the outer diameter of the concrete wall to be formed; is the arc length of the outer wood panel member 3 after the outer diameter of the concrete wall to be formed changes for the jth time; j is the number of times the outer diameter of the concrete wall to be formed changes, j ; The arc length of beam 5 is calculated by the following formula:

[0057] in, is the arc length of the wooden beam 5 used after the outer diameter of the concrete wall to be formed is changed for the jth time; is the arc length of the outer wooden panel member 3 after the outer diameter of the concrete wall to be formed is changed for the jth time; is the diameter of the concrete wall to be formed after the jth diameter change; is the number of the outer steel frame wooden formworks 10 and is rounded up; j is the number of times the outer diameter of the concrete wall to be formed is reduced.

[0058] like Figure 4 As shown, from d to f in the figure, it is a schematic diagram of the changes of the inner steel frame wooden formwork 11 and the small steel frame wooden formwork 6 between them when the inner diameter of the concrete wall to be formed is expanded. When the inner diameter of the concrete wall to be formed is expanded, the small steel frame wooden formwork 6 of equal length is filled between the inner steel frame wooden formwork 11: Specifically: The arc length of the small steel frame wooden formwork 6 is calculated by the following formula:

[0059] in, The arc length of the small steel frame wooden formwork used for the jth expansion of the concrete wall to be formed is 6. is the arc length of the inner wooden panel member 1 after the jth diameter change on the inner side of the concrete wall to be formed; is the diameter of the inner side of the wall after the jth diameter change; is the number of outer steel frame wooden formwork 10 and is rounded up, j is the number of times the inner diameter of the concrete wall to be formed changes, j .

[0060] It is worth noting that: because in reality it is almost impossible for a circular concrete wall to have an outer diameter expansion and an inner diameter reduction during construction, the change in the outer diameter of the concrete wall of the present invention usually refers to the reduction in the inner diameter, and the change in the inner diameter of the concrete wall usually refers to the expansion of the inner diameter.

[0061] Finally, the modified outer steel frame wooden formwork and inner steel frame wooden formwork are installed on the concrete wall to be formed after the diameter is changed, and the longitudinally adjacent outer steel frame members 4 and the longitudinally adjacent inner steel frame members 2 are fixed together by bolts to form a whole.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The circular concrete wall steel frame wooden formwork system is characterized by: The invention comprises a plurality of groups of outer steel frame wood formworks and a plurality of groups of inner steel frame wood formworks, wherein the outer steel frame wood formworks comprise outer steel frame members and outer wood panel members, wherein the outer wood panel members are attached to the outer wall of the concrete wall to be formed, wherein the outer steel frame members are installed on the side of the outer wood panel members away from the concrete wall to be formed, wherein the arc length of the outer wood panel members is greater than the arc length of the outer steel frame members, and the inner steel frame wood formworks comprise inner steel frame members and inner wood panel members, wherein the inner wood panel members are attached to the inner wall of the concrete wall to be formed, wherein the inner steel frame members are installed on the side of the inner wood panel members away from the concrete wall to be formed, wherein the arc length of the inner steel frame members is matched with the arc length of the inner wood panel members; Wooden beams are filled between the circumferentially adjacent outer steel frame members, and small steel frame wooden templates are installed between the circumferentially adjacent inner steel frame wooden templates.

2. The circular concrete wall steel frame wooden formwork system according to claim 1 is characterized in that: The wooden beam is fixed between the circumferentially adjacent outer steel frame members by connecting bolts, and the thickness of the wooden beam is matched with the thickness of the outer steel frame members.

3. The circular concrete wall steel frame wooden formwork system according to claim 1 is characterized by: The small steel frame wooden formwork is connected and fixed to the inner steel frame wooden formwork by self-tapping screws.

4. The circular concrete wall steel frame wooden formwork system according to claim 1 is characterized in that: The number of the inner steel frame wooden formworks is the same as the number of the outer steel frame wooden formworks, the outer steel frame members and the outer wooden panel members are fixed to each other by self-tapping screws, the inner steel frame members and the inner wooden panel members are fixed to each other by self-tapping screws, the circumferentially opposite outer steel frame members and the inner steel frame members are connected and fixed by tension screws, and the circumferentially and axially adjacent outer steel frame members and the circumferentially and axially adjacent inner steel frame members are fixed by bolts.

5. The diameter-changing reconstruction method of the circular concrete wall steel frame wooden formwork system according to any one of claims 1 to 4, characterized in that: When the outer diameter of the concrete wall to be formed is reduced during the upward construction process, the two ends of the outer wooden panel are cut according to the diameter information of the outer side of the concrete wall to be formed after the diameter is changed, and at the same time, wooden beams of corresponding sizes are filled between the circumferentially adjacent outer steel frame members, and the arc length of the wooden beam is the difference between the arc length of the outer wooden panel after the concrete wall to be formed is changed and the arc length of the outer wooden panel before the diameter is changed, and the length of the two ends of the outer wooden panel is half of the difference between the arc length of the outer wooden panel after the concrete wall to be formed is changed and the arc length of the outer wooden panel before the diameter is changed; When the inner diameter of the concrete wall to be formed expands during the upward construction process, small steel frame wooden formworks of corresponding sizes are filled between the inner steel frame wooden formworks according to the diameter information of the inner diameter of the concrete wall to be formed after the diameter change, and the arc length of the small steel frame wooden formworks is the difference between the arc length of the inner wooden panel after the diameter change of the concrete wall to be formed and the arc length of the inner wooden panel before the diameter change.

6. The diameter-changing reconstruction method of the circular concrete wall steel frame wooden formwork system according to claim 5 is characterized by: The arc length of the wooden beam is: ； in, is the arc length of the wooden beam used after the jth diameter change of the outer diameter of the concrete wall to be formed; The arc length of the outer wood panel after the outer diameter of the concrete wall to be formed is the jth diameter change; is the diameter of the concrete wall to be formed after the jth diameter reduction; is the number of outer wood panels and is rounded up; j is the number of times the outer diameter of the concrete wall to be formed is reduced, j 2, is the cutting length of the outer diameter of the concrete wall to be formed at both ends of the outer wood panel after the jth reduction.

7. The diameter-changing reconstruction method of the circular concrete wall steel frame wooden formwork system according to claim 5 is characterized by: The arc length of the small steel frame wooden formwork is: ； in, The arc length of the small steel frame wooden formwork used for the jth expansion of the concrete wall to be formed, is the arc length of the inner wooden panel after the jth diameter change of the inner side of the concrete wall to be formed; is the diameter of the inner side of the wall after the jth diameter change; This is the number of outside wood panel pieces, rounded up.

8. The diameter-changing reconstruction method of the circular concrete wall steel frame wooden formwork system according to claim 5 is characterized by: The method for calculating the arc length of the outer steel frame member includes determining the chord length of the corresponding arc according to the minimum value of the outer diameter variable diameter of the concrete wall to be formed and the number of the outer wooden panel members; Determine the center angle corresponding to half the sum of the maximum and minimum values ​​of the outer diameter variable diameter of the concrete wall to be formed according to the obtained chord length; The arc length corresponding to the outer steel frame member when the outer diameter of the concrete wall to be formed is half the sum of the maximum and minimum values ​​is determined by the obtained central angle of the circle.

9. The diameter-changing reconstruction method of the circular concrete wall steel frame wooden formwork system according to claim 5 is characterized by: The calculation method of the arc length of the inner steel frame member is to determine the chord length of the corresponding arc according to the minimum value of the inner diameter variable diameter of the concrete wall to be formed and the number of the inner wooden panel members; Determine the center angle corresponding to half the sum of the maximum and minimum values ​​of the variable diameter of the inner diameter of the concrete wall to be formed according to the obtained chord length; The arc length corresponding to the inner steel frame member when the inner diameter of the concrete wall to be formed is half the sum of the maximum value and the minimum value is determined by the obtained center angle.

10. The construction method of the circular concrete wall steel frame wooden formwork system according to any one of claims 1 to 9, characterized in that: Determine the size information of the outer steel frame wood formwork, the inner steel frame wood formwork, the wooden beam and the small steel frame wood formwork according to the diameter variation information of the inner and outer sides of the concrete wall to be formed and the size of the standard wood panel member, and design and prepare drawings according to the above information; According to the above drawings, make the outer steel frame wooden formwork, the inner steel frame wooden formwork, the wooden beams and the small steel frame wooden formwork; During construction, the inner steel frame wooden formwork is first installed on the inner side of the concrete wall to be formed by a tower crane, and then the outer steel frame wooden formwork is installed on the outer side of the concrete wall to be formed by a tower crane, and wooden beams of corresponding sizes are filled between the circumferentially adjacent outer steel frame members; When the outer diameter of the concrete wall to be formed changes, the two ends of the outer wooden panel are cut to corresponding lengths and filled with wooden beams of corresponding sizes according to the construction drawings. When the inner diameter of the concrete wall to be formed changes, small steel frame wooden templates of corresponding sizes are filled between the inner steel frame wooden templates according to the construction drawings. Finally, the modified outer steel frame wooden templates and inner steel frame wooden templates are installed on the concrete wall to be formed after the change in diameter.

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