Concrete square cylindrical structure based on steel strand reinforcement connection

Abstract

The invention relates to a concrete square tubular structure based on steel strand reinforcement connection, which comprises at least two layers of tubular sections which are sequentially arranged in the vertical direction, each tubular section is formed by sequentially arranging and splicing a straight-wall-shaped section and an L-shaped section, and a tubular positioning support and a support matching part positioning part are arranged between the upper tubular section and the lower tubular section. An interlayer grouting groove extending in the circumferential direction is formed between the upper side cylindrical section and the lower side cylindrical section. In the invention, the whole concrete square cylindrical structure is formed by sequentially arranging and splicing the straight-wall-shaped sections and the L-shaped sections, the sections adopt the steel strands to replace common steel bars for reinforcement, the sections are connected by the steel strands, and the joints are connected to form a whole, so that the problems that a reinforced concrete structure relates to on-site concrete pouring, manpower and material resources are wasted, and the construction cost is low are solved. And the technical requirements of a joint connection process of the fabricated reinforced concrete structure are high.

Description

Technical Field

[0001] The invention relates to the technical field of assembled reinforced concrete structures, and in particular to a concrete square cylindrical structure based on steel strand reinforcement connection. Background Art

[0002] With the rapid development of my country's economy and the continuous improvement of industrial construction level, the quantity and quality requirements of engineering construction are increasing. Traditional reinforced concrete structures involve on-site concrete pouring, which requires the construction of supporting molds and complex mold brackets, wasting manpower and material resources, and taking a long construction period, which is not conducive to green environmental protection.

[0003] Prefabricated structures using prefabricated components have many advantages such as short construction period and less pollution to the site. However, the treatment of the joints of prefabricated components has always been the focus and difficulty of prefabricated building construction.

[0004] The prior art usually requires pre-embedded connecting bars / connectors in prefabricated components, and then at the construction site, the pre-embedded connecting bars / connectors on two prefabricated components are connected, and then the joint position is cast. The problem with the prior art is that the method of pre-embedded connecting bars / connectors will increase the difficulty of positioning them, increase the difficulty of ensuring the quality of their connection with the distributed steel bars in the prefabricated components, etc., especially the connection between interlayer structures. Summary of the invention

[0005] The object of the present invention is to provide a concrete square cylindrical structure based on steel strand reinforcement connection which can facilitate inter-layer joint connection.

[0006] In order to solve the above technical problems, a technical solution of a concrete square cylindrical structure based on steel strand reinforcement connection in the present invention is as follows: A concrete square cylindrical structure based on steel strand reinforcement connection, comprising at least two layers of cylindrical sections arranged in sequence along the up-down direction, each cylindrical section is a square cylindrical structure, and two adjacent cylindrical sections in the up-down direction are defined as an upper cylindrical section and a lower cylindrical section, a bottom of the upper cylindrical section is provided with a downwardly convex positioning support, a top of the lower cylindrical section is provided with a support matching portion that is positioned and matched with the positioning support, the thickness of the positioning support is less than the wall thickness of the cylindrical section, an interlayer grouting groove is provided between the positioning support and the support matching portion, and the interlayer grouting groove extends along the circumference of the cylindrical section The upper cylindrical section is provided with an upper steel strand reinforcement at the lower end, the upper steel strand reinforcement is arranged at intervals along the circumference of the cylindrical section, and the upper end of the upper steel strand reinforcement is connected to the corresponding steel bar skeleton of the upper cylindrical section; the upper end of the lower cylindrical section is provided with a lower steel strand reinforcement corresponding to each upper steel strand reinforcement, the lower steel strand reinforcement is connected to the corresponding upper steel strand reinforcement by a horizontal dowel or a connector, and the concrete square cylindrical structure also includes an interlayer post-cast concrete cast and fixed on the interlayer grouting groove and the outer periphery of the upper steel strand reinforcement and the lower steel strand reinforcement.

[0007] Furthermore, the upper steel strand reinforcement is a U-shaped structure, and the lower steel strand reinforcement is an inverted U-shaped structure. The upper steel strand reinforcement and the lower steel strand reinforcement are cross-arranged on both sides of the thickness direction of the cylindrical section. The concrete square cylindrical structure also includes horizontal dowel bars installed in the horizontal reverse direction at the intersection of the upper steel strand reinforcement and the lower steel strand reinforcement. The horizontal dowel bars are located on both sides of the thickness direction of the positioning support, and the horizontal dowel bars are tied and fixed to the upper steel strand reinforcement and the lower steel strand reinforcement.

[0008] Furthermore, the concrete square cylindrical structure also includes a joint slurry flow groove that penetrates the positioning support and / or the support matching part along the thickness direction of the cylindrical section, the joint slurry flow groove connects the interlayer grouting groove and the periphery of the positioning support, the transverse sections of the upper steel strand reinforcement and the lower steel strand reinforcement are located in the joint slurry flow groove, the upper end of the lower cylindrical section is provided with a segment upper side notch, the support matching part is provided at the bottom of the segment upper side notch, the positioning support is located in the segment upper side notch, the thickness of the positioning support is less than the width of the segment upper side notch, the interlayer post-cast concrete is filled between the segment upper side notch and the periphery of the positioning support, and the lower steel strand reinforcement is located in the segment upper side notch.

[0009] Furthermore, the interlayer grouting groove is composed of an upper interlayer grouting groove arranged at the bottom of the positioning support and a lower interlayer grouting groove arranged at the top of the support matching part.

[0010] Furthermore, each cylindrical segment is composed of an L-shaped segment component located at the corner of the cylindrical segment and a straight-wall segment component arranged between two corresponding adjacent L-shaped segment components. There is a vertical joint extending vertically between adjacent segment components and connected to the interlayer grouting grooves. Vertical post-cast concrete is poured in the vertical joint and is an integral structure with the interlayer post-cast concrete.

[0011] Furthermore, two adjacent segment components are defined as a first segment component and a second segment component, and a segment side slurry groove is provided on at least one of the adjacent side surfaces of the first segment component and the second segment component, and the segment side slurry groove is connected to the interlayer grouting groove.

[0012] Furthermore, a first steel strand reinforcement is arranged on a side of the first segment component facing the second segment component, and a second steel strand reinforcement is arranged on a side of the second segment component facing the first segment component. The concrete square cylindrical structure also includes vertical dowel bars arranged along the vertical direction, and the vertical dowel bars are connected to the first steel strand reinforcement and the second steel strand reinforcement of each layer of the cylindrical segment. Vertical post-cast concrete is cast and fixed to the periphery of the vertical dowel bars, the first steel strand reinforcement and the second steel strand reinforcement.

[0013] Furthermore, the first steel strand reinforcement and the second steel strand reinforcement are U-shaped reinforcements facing opposite directions, the first steel strand reinforcement and the second steel strand reinforcement are cross-arranged at both ends of the segment component in the thickness direction, and the vertical dowel bars are inserted at the intersection of the first steel strand reinforcement and the second steel strand reinforcement.

[0014] Furthermore, the first steel strand reinforcement is distributed on both sides of the slurry groove on the side of the segment, the second steel strand reinforcement is distributed on both sides of the slurry groove on the side of the segment, the first steel strand reinforcement has a first connecting ring, and the second steel strand reinforcement has a second connecting ring located above or below the first connecting ring, and the vertical inserted bars are passed through the first connecting ring and the second connecting ring.

[0015] Furthermore, the first steel strand reinforcement and the second steel strand reinforcement are connected via a connecting ring, and the vertical inserted bars are inserted into the connecting ring.

[0016] The beneficial effects of the present invention are as follows: in the present invention, when the upper cylindrical section and the lower cylindrical section are assembled on site, the positioning support of the upper cylindrical section cooperates with the supporting matching part of the lower cylindrical section, thereby positioning the upper cylindrical section and the lower cylindrical section, playing the role of temporary support matching and positioning, connecting the upper steel strand reinforcement with the lower steel strand reinforcement, and during the pouring of interlayer post-cast concrete, the interlayer post-cast concrete flows circumferentially along the interlayer tank slurry groove, and flows along the joint slurry groove to the horizontal dowel bar outside the positioning support, thereby forming a perfect wrapping of the joint position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1It is a structural schematic diagram of an embodiment of a concrete square cylindrical structure based on steel strand reinforcement connection in the present invention; Figure 2 yes Figure 1 Structural schematic diagram of the middle L-shaped segment component; Figure 3 yes Figure 2 The enlarged view of (1) in the figure; Figure 4 yes Figure 2 The enlarged view of (2) in the figure; Figure 5 yes Figure 2 The front view of the middle L-shaped segment component; Figure 6 yes Figure 1 A schematic diagram of the structure of a middle straight wall segment component; Figure 7 yes Figure 6 The enlarged view of (3) in the figure; Figure 8 yes Figure 6 Side view of Fig. 9 yes Figure 8 The enlarged view of (4) in the figure; Fig.10 yes Figure 1 A partial cross-sectional view of a middle straight wall segment component; Fig.11 yes Fig.10 AA section view; Fig.12 It is a schematic diagram of the coordination of the upper cylindrical section and the lower cylindrical section in Example 1; Fig.13 is a schematic diagram of the coordination of the first segment component and the second segment component in Example 1; Fig.14 This is a schematic structural diagram of a straight-wall segmental member in Example 2 of a concrete square cylindrical structure connected based on steel strand reinforcement in the present invention; Fig.15 yes Fig.14 Side view of Fig.16 It is a structural schematic diagram of a vertical joint in Example 3 of a concrete square cylindrical structure connected based on steel strand reinforcement in the present invention; Fig.17 This is a schematic diagram of the connection between the first steel strand reinforcement and the second steel strand reinforcement in Example 4 of a concrete square cylindrical structure based on steel strand reinforcement connection in the present invention; Fig.18 This is a schematic diagram of the connection between the first steel strand reinforcement and the second steel strand reinforcement in Example 5 of a concrete square cylindrical structure based on steel strand reinforcement connection in the present invention; Fig.19 This is a schematic structural diagram of a horizontal joint in Example 6 of a concrete square cylindrical structure connected based on steel strand reinforcement in the present invention; Fig. 20 This is a schematic diagram of the connection between the upper steel strand reinforcement and the lower steel strand reinforcement in Example 7 of a concrete square cylindrical structure based on steel strand reinforcement connection in the present invention; Fig.21 This is a schematic structural diagram of three types of connectors in Example 8 of a concrete square cylindrical structure connected based on steel strand reinforcement in the present invention; Fig. 22 This is a schematic structural diagram of a connector in Example 9 of a concrete square cylindrical structure connected based on steel strand reinforcement in the present invention; Explanation of reference numerals: 1, cylindrical section; 11, straight-walled segment member; 12, L-shaped segment member; 13, interlayer grouting groove; 131, lower interlayer grouting groove; 132, segment upper notch; 133, upper interlayer grouting groove; 134, closing structure; 14, positioning support; 141, upper interlayer grouting groove; 142, joint slurry groove; 15, segment side slurry flow groove; 161, lower steel strand reinforcement; 162, first steel strand reinforcement; 163, upper steel strand reinforcement; 164, second steel strand reinforcement; 165, annular reinforcement; 21, horizontal joint; 22, vertical joint; 3. Joint connection; 31. Horizontal dowels; 32. Interlayer post-cast concrete; 33. Horizontal joint full-length grouting channel; 34. Vertical dowels; 4. Connectors; 41. Bolts; 42. Bolt holes; 43. Ring pin connectors; 44. Rectangular pin connectors; 45. Adjustable distance X-shaped pin connectors; 35. Vertical post-cast concrete; 6. Adjustable distance bolt connectors; 61. Through-reinforcement bolts; 611. Through-reinforcement holes; 612. Threaded ends; 62. Nut fixings; 621. Bolt holes; 622. Nut fixing grooves; 63. Nuts; 8. Steel bar skeleton; 9. First connecting ring; 10. Second connecting ring; 11. Connectors; 5. Wrapped connectors; 51. Wrapped fixings; 52. Wrapped fasteners; 7—Rotatable annular connectors; 71—C-shaped parts; 711—Anchor holes; 72—Pin shafts; 73. Anchors. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0020] In the present invention, a concrete square cylindrical structure based on steel strand reinforcement connection is described in Example 1. Figures 1 to 13 As shown: It includes multiple layers of cylindrical segments 1 arranged in sequence along the up-down direction, each cylindrical segment 1 is a square cylindrical structure, and two adjacent cylindrical segments in the up-down direction are defined as an upper cylindrical segment and a lower cylindrical segment, respectively. Each cylindrical segment is composed of an L-shaped segment component 12 located at the corner of the cylindrical segment and a straight-wall segment component 11 arranged between the corresponding two adjacent L-shaped segment components. In this embodiment, there is no straight-wall segment between the two L-shaped segments along the width direction of the cylindrical segment, and there is a straight-wall segment between the two L-shaped segments along the length direction of the cylindrical segment. In other embodiments of the present invention, there may also be a straight-wall segment between the two L-shaped segments along the width direction of the cylindrical segment, and there may also be multiple straight-wall segments between the two L-shaped segments along the length direction of the cylindrical segment.

[0021] It is defined that two adjacent segment components are respectively a first segment component and a second segment component, a horizontal joint 21 is between two adjacent cylindrical segments, and a vertical joint 22 is between two adjacent segment components.

[0022] A horizontal joint through-length grouting channel 33 is formed between the upper cylindrical section and the lower cylindrical section. A downwardly convex positioning support 14 is provided at the bottom of the upper cylindrical section. A support matching portion for positioning with the positioning support is provided at the top of the lower cylindrical section. The thickness of the positioning support 14 is less than the wall thickness of the cylindrical section. The upper end of the support matching portion has a closing structure 134 that is larger at the top and smaller at the bottom and is used for positioning with the positioning support. A segment upper notch 132 is provided at the upper end of the lower cylindrical section. The support matching portion is provided at the bottom of the notch 132 of the segment upper notch. The positioning support 14 is located in the segment upper notch 132. The thickness of the positioning support is less than the width of the segment upper notch.

[0023] An interlayer grouting groove is provided between the positioning support and the support matching part and spans the positioning support and the support matching part in the up-down direction. The interlayer grouting groove is extended circumferentially along the cylindrical section. In the present embodiment, the interlayer grouting groove includes an upper interlayer grouting groove 141 provided at the bottom of the positioning support and a lower interlayer grouting groove 131 provided at the top of the support matching part. The cross-sectional shapes of the upper interlayer grouting groove 141 and the lower interlayer grouting groove 131 are both semicircular.

[0024] The lower end of the upper cylindrical section is provided with upper steel strand reinforcement 163 of a U-shaped structure, which is arranged at intervals along the circumference of the cylindrical section, and the upper end of the upper steel strand reinforcement is connected to the corresponding steel skeleton of the upper cylindrical section. The upper end of the lower cylindrical section is provided with lower steel strand reinforcement 161 of an inverted U-shaped structure corresponding to each upper steel strand reinforcement, and the lower end of the lower steel strand reinforcement 161 is connected to the corresponding steel skeleton of the lower cylindrical section. In this embodiment, Fig.11 As shown, the steel strand reinforcement is formed by an annular rib 165 connected to the steel skeleton of the corresponding segment component, the lower end of the annular rib constitutes the upper steel strand reinforcement, and the upper end of the annular rib constitutes the lower steel strand reinforcement.

[0025] Along the thickness direction of the cylindrical section, the two ends of the upper steel strand reinforcement and the two ends of the lower steel strand reinforcement are arranged crosswise, and the concrete square cylindrical structure also includes horizontal dowel bars 31 installed in the horizontal reverse direction at the intersection of the upper steel strand reinforcement and the lower steel strand reinforcement, and the horizontal dowel bars 31 are located on both sides of the thickness direction of the positioning support. The horizontal dowel bars are tied and fixed with the upper steel strand reinforcement and the lower steel strand reinforcement, and the concrete square cylindrical structure also includes a joint slurry flow groove 142 that penetrates the positioning support along the thickness direction of the cylindrical section, and the joint slurry flow groove 142 connects the interlayer grouting groove 13 and the periphery of the positioning support 14, and the transverse sections of the upper steel strand reinforcement 163 and the lower steel strand reinforcement 161 are located in the joint slurry flow groove 142. The concrete square cylindrical structure also includes interlayer post-cast concrete 32 that is cast and fixed in the interlayer grouting groove, the joint slurry flow groove, and the periphery of the horizontal dowel bars and the upper steel strand reinforcement and the lower steel strand reinforcement.

[0026] In this embodiment, the space between the upper notch 132 of the segment and the periphery of the positioning support 14 is filled with interlayer post-cast concrete 32 , and the lower steel strand reinforcement 161 is located in the upper notch 132 of the segment.

[0027] The vertical joint 22 is communicated with the interlayer grouting groove 13 , and vertical post-cast concrete 35 is poured in the vertical joint 22 to form an integrated structure with the interlayer post-cast concrete.

[0028] A segment side slurry groove 15 is provided on at least one of the adjacent side surfaces of the first segment component and the second segment component, and the segment side slurry groove 15 is connected to the interlayer grouting groove 13. In this embodiment, the adjacent side surfaces of the first segment component and the second segment component are arranged at intervals, and the segment side slurry grooves 15 are provided on the adjacent side surfaces of the first segment component and the second segment component.

[0029] A first steel strand reinforcement 162 is arranged on the side of the first segment component facing the second segment component, and a second steel strand reinforcement 164 is arranged on the side of the second segment component facing the first segment component. The concrete square cylindrical structure also includes vertical dowel bars 34 arranged vertically, and the vertical dowel bars 34 are connected to the first steel strand reinforcement and the second steel strand reinforcement of each layer of the cylindrical segment. Vertical post-cast concrete is cast and fixed to the periphery of the vertical dowel bars, the first steel strand reinforcement and the second steel strand reinforcement.

[0030] In this embodiment, the first steel strand reinforcement 162 and the second steel strand reinforcement 164 are U-shaped reinforcements facing opposite directions. The first steel strand reinforcement and the second steel strand reinforcement are cross-arranged at both ends of the segment component in the thickness direction, and the vertical dowel bars are inserted at the intersection of the first steel strand reinforcement and the second steel strand reinforcement.

[0031] The L-shaped segment components and straight-wall segment components of each cylindrical section are all factory prefabricated parts. During on-site construction, first complete the placement of each L-shaped segment component and straight-wall segment component in the lower cylindrical section, and then complete the placement of each L-shaped segment component and straight-wall segment component in the upper communication section. The L-shaped segment component in the upper cylindrical section is located directly above the corresponding L-shaped segment component in the lower cylindrical section, and the straight-wall segment component in the upper cylindrical section is located directly above the opposite straight-wall segment component in the lower cylindrical section. Then, horizontal dowel bars are inserted at the intersection of the upper steel strand reinforcement and the lower steel strand reinforcement, and tied and fixed; vertical dowel bars are inserted at the intersection of the first steel strand reinforcement and the second steel strand reinforcement, and tied and fixed. After the installation of each layer of cylindrical sections is completed, formwork can be set up on the periphery of the horizontal joints and vertical joints, and concrete can be poured from top to bottom along the vertical joints. While the concrete flows downward along the vertical joints, it will also flow along the circumference of the cylindrical sections along the transverse joints. Finally, the concrete in the vertical joints solidifies to form vertical post-cast concrete, and the concrete in the transverse joints solidifies to form interlayer post-cast concrete with a structure integrated with the vertical post-cast concrete.

[0032] Example 2 of a concrete square cylindrical structure based on steel strand reinforcement connection Figures 14 and 15 As shown: Embodiment 2 is different from Embodiment 1 in that, In this embodiment, the positioning support 14 is not a continuous structure, but a plurality of protrusions arranged at intervals, and the support matching portion 9 is a positioning groove with a height lower than the positioning support and corresponding to the lower end of the positioning support 14 for positioning and matching.

[0033] Example 3 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig.16As shown: Example 3 is different from Example 1 in that, along the thickness direction of the cylindrical section, the first steel strand reinforcement 162 is distributed on both sides of the slurry groove 15 on the side of the segment, and the second steel strand reinforcement 164 is distributed on both sides of the slurry groove on the side of the segment. The first steel strand reinforcement has a first connecting ring 9, and the second steel strand reinforcement has a second connecting ring 35 located on the upper side or lower side of the first connecting ring, and the vertical dowel bar 34 is inserted into the first connecting ring and the second connecting ring.

[0034] Example 4 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig.17 As shown: The difference between Example 4 and Example 3 is that the first steel strand reinforcement 162 and the second steel strand reinforcement 164 are connected by a wrapping type connector 5, in which item 51 represents a wrapping fixture and item 52 represents a wrapping fastener.

[0035] Example 5 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig.18 As shown: Example 5 is different from Example 3 in that the first steel strand reinforcement 162 is a triangular structure, the second steel strand reinforcement 164 is a triangular structure, the first steel strand reinforcement and the second steel strand reinforcement are connected by a rotatable annular connector 7 that can rotate, the rotatable annular connector includes two C-shaped parts hingedly connected by a pin shaft 72, and the other ends of the two C-shaped parts are provided with anchor holes 711. After the first steel strand reinforcement and the second steel strand reinforcement are connected by the two C-shaped parts, the anchor bolts are inserted into the corresponding anchor bolt holes, so that the rotatable annular connector becomes a closed annular structure. Rotating the rotatable annular connector can tighten the first steel strand reinforcement and the second steel strand reinforcement, and then the vertical dowel bar passes vertically through the center holes of each rotatable annular connector in the same vertical direction.

[0036] Example 6 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig.19 As shown: Example 6 is different from Example 1 in that, for horizontal joints, the interlayer grouting groove 13 is only arranged on the lower cylindrical section, the upper steel strand reinforcement and the lower steel strand reinforcement are not U-shaped structures, and the upper steel strand reinforcement and the lower steel strand reinforcement are both single steel strand structures. The bottom of the upper steel strand reinforcement 163 has an upper connecting ring, and the top of the lower steel strand reinforcement 161 has a lower connecting ring. The horizontal dowel bar 31 passes through the inner hole of the upper connecting ring and the corresponding lower connecting ring, and the horizontal dowel bar 31 realizes the connection between the upper steel strand reinforcement and the lower steel strand reinforcement.

[0037] Example 7 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig. 20 As shown: The difference between Example 7 and Example 6 is that after the upper connecting ring at the bottom of the upper steel strand reinforcement 163 rotates and the lower connecting ring at the top of the lower steel strand reinforcement 161 rotates, the horizontal inserted reinforcement 31 is then inserted into the inner holes of the upper connecting ring and the lower connecting ring, which can ensure that the upper steel strand reinforcement and the lower steel strand reinforcement are in a tensioned state.

[0038] Example 8 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig.21 As shown: Example 8 is different from Example 6 in that the upper connecting ring at the bottom of the upper steel strand reinforcement and the connecting ring at the top of the lower steel strand reinforcement are not connected by horizontal dowel bars, and the upper connecting ring and the lower connecting ring are connected by a connector 4. Of course, the first steel strand reinforcement and the second steel strand reinforcement can also be connected by a connector 4.

[0039] The connecting member 4 has three structural forms, namely a, b and c from top to bottom in the figure. Among them, a is an annular pin connector 43 , and a bolt hole 42 is provided on the annular pin connector 43 . After the upper connecting ring and the lower connecting ring are connected to the annular pin connector 43 , a bolt 41 is inserted into the bolt hole 42 .

[0040] Among them, b is a rectangular pin connector 44, and its use is similar to a. After the upper connecting ring and the lower connecting ring are connected to the rectangular pin connector 44, the bolt 41 is inserted into the bolt hole 42.

[0041] Among them, c is an adjustable distance X-shaped pin connector 45, and a plurality of groups of bolt holes are arranged on the X-shaped pin connector 45. By inserting the bolts 41 into the bolt holes 42 at different positions, the spacing between the upper connecting ring and the lower connecting ring can be adjusted.

[0042] Example 9 of a concrete square cylindrical structure based on steel strand reinforcement connection Fig. 22 As shown: In this embodiment, the connector for connecting the corresponding two steel strand reinforcements is an adjustable-distance bolt connector 6, which includes a nut fastener, with bolt holes 621 provided at both ends of the nut fastener, a nut fixing groove 622 provided between the two bolt holes 621 in the nut fastener, and two nuts 63 corresponding to the bolt holes 621 respectively provided in the nut fixing groove 622, and the nuts and the nut fixing groove 622 are locked. A through-reinforcement bolt 61 is connected to the corresponding steel strand reinforcement, and item 611 in the figure represents the through-reinforcement hole, and item 612 represents the threaded end. The threaded end 612 of the through-reinforcement bolt 61 is inserted into the corresponding bolt hole and threadedly matched with the corresponding nut 63. In this way, the connection of the two steel strand reinforcements is achieved. During the screwing of the through-reinforcement bolt 61, the connecting ring on the corresponding steel strand reinforcement rotates to tighten the corresponding steel strand reinforcement.

[0043] It can be explained through the above embodiments that, in the present invention, the corresponding two steel strand reinforcements can be connected by inserting reinforcing bars or by connecting pieces of various structural forms.

[0044] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0045] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0046] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A square concrete cylindrical structure connected by steel strand reinforcement, comprising at least two layers of cylindrical sections arranged in sequence in the up-down direction, characterized in that: Each cylindrical section is a square cylindrical structure, and the two adjacent cylindrical sections in the upper and lower directions are defined as an upper cylindrical section and a lower cylindrical section respectively. A downwardly convex positioning support is provided at the bottom of the upper cylindrical section, and a support matching part that is positioned and matched with the positioning support is provided at the top of the lower cylindrical section. The thickness of the positioning support is less than the wall thickness of the cylindrical section. An interlayer grouting groove is provided between the positioning support and the support matching part. The interlayer grouting groove is extended along the circumference of the cylindrical section. An upper steel strand matching part is provided at the lower end of the upper cylindrical section. The upper steel strand reinforcement is arranged at intervals along the circumference of the cylindrical section, and the upper end of the upper steel strand reinforcement is connected to the corresponding steel bar skeleton of the upper cylindrical section; the upper end of the lower cylindrical section is provided with lower steel strand reinforcement corresponding to each upper steel strand reinforcement, and the lower steel strand reinforcement is connected to the corresponding upper steel strand reinforcement through horizontal dowel bars or connectors. The concrete square cylindrical structure also includes interlayer post-cast concrete cast and fixed on the interlayer grouting groove and the outer periphery of the upper steel strand reinforcement and the lower steel strand reinforcement.

2. The concrete square cylindrical structure according to claim 1, characterized in that: The upper steel strand reinforcement is a U-shaped structure, and the lower steel strand reinforcement is an inverted U-shaped structure. The upper steel strand reinforcement and the lower steel strand reinforcement are cross-arranged on both sides of the thickness direction of the cylindrical section. The concrete square cylindrical structure also includes horizontal dowel bars installed in the horizontal reverse direction at the intersection of the upper steel strand reinforcement and the lower steel strand reinforcement. The horizontal dowel bars are located on both sides of the thickness direction of the positioning support, and the horizontal dowel bars are tied and fixed to the upper steel strand reinforcement and the lower steel strand reinforcement.

3. The concrete square cylindrical structure according to claim 2, characterized in that: The concrete square cylindrical structure also includes a joint slurry flow groove that penetrates the positioning support and / or the support matching part along the thickness direction of the cylindrical section, the joint slurry flow groove connects the interlayer grouting groove and the periphery of the positioning support, the transverse sections of the upper steel strand reinforcement and the lower steel strand reinforcement are located in the joint slurry flow groove, the upper end of the lower cylindrical section is provided with a segment upper notch, the support matching part is arranged at the bottom of the segment upper notch, the positioning support is located in the segment upper notch, the thickness of the positioning support is less than the width of the segment upper notch, the interlayer post-cast concrete is filled between the segment upper notch and the periphery of the positioning support, and the lower steel strand reinforcement is located in the segment upper notch.

4. The concrete square cylindrical structure according to claim 1, characterized in that: The interlayer grouting groove is composed of an upper interlayer grouting groove arranged at the bottom of the positioning support and a lower interlayer grouting groove arranged at the top of the support matching part.

5. The concrete square cylindrical structure according to any one of claims 1 to 4, characterized in that: Each cylindrical segment is composed of an L-shaped segment component located at the corner of the cylindrical segment and a straight-wall segment component arranged between two corresponding adjacent L-shaped segment components. There is a vertical joint extending vertically between adjacent segment components and connected to the interlayer grouting grooves. Vertical post-cast concrete is poured in the vertical joint and is an integrated structure with the interlayer post-cast concrete.

6. The concrete square cylindrical structure according to claim 5, characterized in that: Two adjacent segment components are defined as the first segment component and the second segment component, at least one of the adjacent side surfaces of the first segment component and the second segment component is provided with a segment side slurry groove, the segment side slurry groove is connected with the interlayer grouting groove, a first steel strand reinforcement is provided on the side of the first segment component facing the second segment component, and a second steel strand reinforcement is provided on the side of the second segment component facing the first segment component, and the first steel strand reinforcement is connected to the corresponding second steel strand reinforcement through vertical dowels or connectors.

7. The concrete square cylindrical structure according to claim 6, characterized in that: The concrete square cylindrical structure also includes vertical dowel bars arranged vertically, which are connected to the first steel strand reinforcement and the second steel strand reinforcement of each layer of the cylindrical section, and the vertical post-cast concrete is cast and fixed on the periphery of the vertical dowel bars, the first steel strand reinforcement and the second steel strand reinforcement.

8. The concrete square cylindrical structure according to claim 7, characterized in that: The first steel strand reinforcement and the second steel strand reinforcement are U-shaped reinforcements facing opposite directions. The first steel strand reinforcement and the second steel strand reinforcement are cross-arranged at both ends of the segment member in the thickness direction, and the vertical dowel bars are inserted at the intersection of the first steel strand reinforcement and the second steel strand reinforcement.

9. The concrete square cylindrical structure according to claim 7, characterized in that: The first steel strand reinforcement is distributed on both sides of the slurry groove on the side of the segment, and the second steel strand reinforcement is distributed on both sides of the slurry groove on the side of the segment. The first steel strand reinforcement has a first connecting ring, and the second steel strand reinforcement has a second connecting ring located above or below the first connecting ring. The vertical inserted bars are inserted into the first connecting ring and the second connecting ring.

10. The concrete square cylindrical structure according to claim 7, characterized in that: The first steel strand reinforcement and the second steel strand reinforcement are connected through a connecting ring, and the vertical dowel bars are inserted into the connecting ring.

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