JP3117906U - Tower structure - Google Patents

Abstract

An object of the present invention is to provide a tower-like structure that can minimize the work on the construction site of the tower-like structure and can shorten the construction period compared to the prior art.
A tower-like structure constructed by connecting a plurality of segments (1) to form a short cylindrical shape and stacking them up and down to integrate them, and each segment within the segment ring (R). Protrusions 4a and 4b are integrally provided on the inner side of one joint end, and the anchor PC steel rod 6 is placed in the one projecting part 4a of the joint ends joined to each other toward the other projecting part 4b. A tower-like structure in which the segments 1 are integrated by projecting and tension-fixing this to the back side of the other projecting portion 4b through the PC steel rod through hole 7 formed in the other projecting portion 4b.
[Selection] Figure 1

Description

    The present invention relates to a tower-like structure constructed in a hollow cylindrical shape by connecting a plurality of segments to assemble a short cylindrical segment ring, and stacking the segment rings vertically and connecting them together.

  Conventionally, for example, a large chimney or other tower-like structure has a reinforcing bar in a ring shape, and an inner mold and an outer mold are assembled so that the reinforcing bar is sandwiched from inside and outside. There is one constructed by pouring concrete into the wall and forming a unit of a construction length of a cylindrical body in the upward direction.

  In addition, there is a hollow cylindrical tower-like structure in which an H-shaped steel is erected in an annular shape at intervals, and a plate-like precast concrete block is inserted and fixed between the H-shaped steels.

Furthermore, the construction period can be shortened compared to the conventional tower-like structure, and a pair of precast concrete blocks having a substantially semi-cylindrical shape are joined to each other at their end joint surfaces to form a cylindrical peripheral wall. There is a construction method for constructing a hollow cylindrical tower-like structure by forming a cylindrical ring by placing cast-in-place connecting concrete between the joint end faces, and forming a large number of cylindrical rings up and down. There is (for example, Patent Document 1).
Japanese Patent No. 3044459

  Among the above-mentioned conventional tower-like structures, if the outer wall is molded from cast-in-place concrete, many on-site work such as assembly of formwork, reinforcement, concrete placement, etc. is required, and the construction period is There is a problem that it is unavoidable that a long working space is required, and that a large work space is required, which makes it difficult to work on a narrow construction site.

  In addition, when using precast concrete blocks such as concrete segments manufactured at the factory, the construction period can be shortened because part of the frame is manufactured at the factory. To use it, it was necessary to assemble the formwork, arrange the bars, and fill the concrete.

  Furthermore, in the tower-like structure constructed by the conventional construction method, the entire outer peripheral surface or a part thereof is molded by on-site construction. For example, colors and designs that match the surrounding environment are used. In the case of applying, there has been a problem that after the building of the tower-like structure body, a finishing work on its outer surface is required, which increases the cost and requires a work period for that purpose.

  In view of the conventional problems as described above, the present invention has been made for the purpose of providing a tower-like structure that can reduce the work at the construction site of the tower-like structure as much as possible and can shorten the construction period compared to the above-described conventional method. Is.

    In order to solve the above-mentioned conventional problems and achieve the initial object, the feature of the device according to claim 1 is that a plurality of segments are connected to form a short cylindrical shape, and the segment rings are vertically stacked and integrated. In the tower-like structure configured by forming the projecting portion, a protruding portion is integrally provided on the inner side of the joining end portion of each segment constituting the segment ring inside the segment ring, and joined to each other. An anchor PC steel rod that protrudes toward the other protrusion is provided in one of the protrusions, and a PC steel rod through hole is formed in the other protrusion in the extending direction of the anchor PC steel rod. The anchor PC steel bars are integrated with each other by tension fixing the back side of the other protrusion through the PC steel bar through hole.

  A feature of the device according to claim 2 is that, in addition to the structure of claim 1, an extension PC steel rod for tension is connected to the tip of the anchor PC steel rod protruding from the one projecting portion via a coupler, The extension PC steel rod for tension is penetrated through the PC steel rod through-hole of the other protrusion, and the tension is fixed on the back side of the other protrusion.

  A feature of the invention according to claim 3 is that, in addition to the configuration of claim 1 or 2, a recess for accommodating the PC steel rod fixing member is formed on the back surface of the other protrusion, and the fixing member is disposed in the recess. It is in burial by burial.

  The feature of the invention according to claim 4 is that, in addition to the configuration of claim 1, 2 or 3, the segment ring is connected by joining a pair of segments having a shape obtained by dividing the segment ring into two equal parts and joining the joint surfaces at both ends of each segment. The opening prevention member is constructed between a pair of joining parts which are constituted by doing this and each joining surface is joined.

  A feature of the device according to claim 5 is that, in addition to the configuration of claims 1 to 3 or 4, each segment is provided with a PC steel rod insertion hole in the vertical direction toward the axial direction of the segment ring. The upper and lower segment rings are integrated by tensioning the PC steel rod inserted across the upper and lower segments in the steel rod insertion hole.

  In the present invention, a protrusion is integrally provided inside the joint end of each segment constituting the segment ring inside the segment ring, and in one of the joint ends joined to each other. An anchor PC steel rod that protrudes toward the other protrusion is provided, and a PC steel rod through-hole is formed in the extension direction of the anchor PC steel rod in the other protrusion, and the anchor PC steel rod is By joining the segments together by fixing the tension to the back side of the other protrusion through the PC steel rod through hole (Claim 1), the joining operation of the segments is performed only from the inside of the segment ring, In addition, the joint can be a so-called zero joint joint with no gaps, and it is not necessary to finish the outer surface of the inter-segment joint in the segment ring. Since the outer surface of the design of segments forming can be used directly as the outer surface cosmetic repair and outer surface finishing of the outer surface of the design after the building frame construction becomes unnecessary, construction period is shortened as compared with the prior art.

  Further, a tension extension PC steel rod is connected to the tip of the anchor PC steel rod protruding from the one projecting portion via a coupler, and the tension extension PC steel rod is connected to the PC steel rod of the other projection portion. By projecting through the through-hole and fixing the tension to the back side of the other projecting portion (Claim 2), the projecting length from the joint surface of the anchor PC steel rod can be shortened, and the segment is transported. And easy handling during storage.

  Further, a recess for accommodating the PC steel rod fixing member is formed on the back surface of the other protrusion, and the fixing member is embedded in the recess by backfilling (Claim 3), whereby the backfilling portion is Since it is inside the segment ring, there is no risk that the backfill portion will be peeled off and cause damage to passers-by, and there is no need to form an external suspension scaffold for forming the backfill portion.

  Further, the segment ring is formed by connecting a pair of segments having a shape obtained by dividing the segment ring into two equal parts by joining the joint surfaces of both ends of the segments to each other and connecting the joint surfaces to each other. Since the opening prevention member is installed on the base (claim 4), the joint portion of the segment is prevented from bulging in the radial direction, and a strong coupling is achieved.

  Further, each segment is provided with a vertical PC steel rod insertion hole directed in the axial direction of the segment ring, and the PC steel rod inserted across the upper and lower segments in the PC steel rod insertion hole is tensioned. By doing so, prestress is applied over the entire length of the tower-like structure, and at the same time, strong integration between the upper and lower segment rings is achieved.

  Next, an embodiment of the tower structure according to the present invention will be described with reference to the drawings.

  In this example, a tower-like structure is formed by stacking and connecting round-shaped segment rings R obtained by dividing a hexagonal cylindrical tower-like structure into a large number in the horizontal direction. As shown in FIG. 1, the hexagonal ring shape is divided into two equal parts at two diagonal positions, and segments 1 are joined together.

  The two segments 1, 1 each having two corners shown in FIG. 1 are precast concrete blocks molded in advance in a factory, and the joining surfaces 3a of the joining ends 2a, 2b of the segments 1, 1 are shown. , 3b are formed so as to be in close contact with each other. The joining surfaces 3a and 3b of the joining end portions 2a and 2b have a structure in which the horizontal length is extended by projecting portions 4a and 4b that are integrally molded by projecting inside the segment ring R of each joining end portion. It has become.

  The segment 1 is manufactured by so-called match cast, that is, the joint surfaces 3a and 3b that are joined to each other between a pair of segments are made to face each other and both the segments 1 and 1 are used at the same time. As a result, a segment ring R joined in a so-called zero joint state in which no joint material is interposed is formed.

  As shown in FIG. 2, a tip of an anchor PC steel rod 6 for inter-segment connection that is prevented from coming off by an anchor plate 5 embedded in the segment 1 protrudes from one joining surface 3a. A PC steel rod insertion hole 7 penetrating the protruding portion 4b is opened in the surface 3b. The opening side of the joint side of the PC steel rod insertion hole 7 is an enlarged diameter portion 7a for accommodating a coupler, and the coupler 8 is accommodated in the enlarged diameter portion 7a. An extension PC steel rod 9 for fastening inserted through the PC steel rod insertion hole 7 is connected to the tip of the steel rod 6, and this extension PC steel rod 9 for tension is connected to the inner surface side of the segment ring R of the projecting portion 4b. The fixing tool 11 is fixed to the bearing plate 10. Thus, both the segments 1 and 1 are assembled into a ring-shaped segment ring R.

  The PC steel bar fixing member including the bearing plate 10, the protruding end of the extending PC steel bar 9, and the fixing tool 11 is accommodated in the recessed part 12 on the back surface of the protruding part 4b, and the recessed part 12 is mortar or the like. It is embed | buried so that it may not be exposed to external air by burying with the backfilling 13 of.

  As shown in FIG. 2, each segment 1 has a vertical bar insertion hole 20 and a PC steel rod insertion hole 21 penetratingly opened at regular intervals in the horizontal direction.

  As shown in FIG. 3, a filling-type joint 22 is embedded at the lower end of the longitudinal bar insertion hole 20, and grout holes 22 a and 22 a are opened to the upper surface of the segment 1 on the inner surface side of the segment 1. In the lower end of the joint 22, the upper end of the vertical bar 23 inserted into the vertical segment insertion hole 20 of the lower segment was inserted into the upper segment vertical bar insertion hole 22 in the upper end of the joint 22. The upper and lower vertical stripes 23 and 23 are connected by inserting the lower ends of the vertical stripes 23 and filling solidified grout from one of the grout holes 22a.

  As shown in FIG. 4, the PC steel rod insertion hole 21 is formed with an enlarged diameter portion 21 a for accommodating a coupler at the lower end thereof, and the lower end of the coupler 25 accommodated therein is connected to the lower segment 1. The PC steel inserted into the PC steel rod insertion hole 21 and screwed into the upper end of the PC steel rod 26 protruded from the upper surface of the segment, and inserted into the upper end of the PC steel rod insertion hole 21 of the coupler 25. The lower end of the rod 26 is screwed together so as to be continuous over the top and bottom of the tower-like structure.

  A horizontal joint gap 30 for adjusting the level is formed on the joint surface between the ring-shaped segment rings R adjacent to each other in the vertical direction, and the level is adjusted by interposing a liner (not shown) in the gap. The gap 30 is filled with a horizontal joint material 31 made of non-shrink mortar.

  The segment ring R at the lowermost end connects the PC steel rod 26 via the coupler 25 to the anchor PC steel rod 34 which is embedded in the base portion 32 by the anchor plate 33 as shown in FIG. In addition, in the uppermost segment, the tension is fixed to the bearing plate 36 in the recessed portion 35 formed at the upper end portion of the PC steel rod insertion hole 21, and the recessed portion 35 is filled with mortar after fixing. Further, the tension fixation of the PC steel rod 26 with respect to the upper and lower segment rings R is tensioned each time the segment rings R are stacked, and is fixed by the fixing tool 37 to the bearing plate 36 installed on the upper end surface of each segment. ing.

  Further, between the segment joints of the segment rings R which are diagonally arranged, in this example, between the other protrusions 4a, 4b of both segments, the partition material made of a concrete extrusion molding plate is used as an opening stopper. A member 38 is stretched over to prevent the joint from spreading outward and reinforce the joint.

  Next, the construction process of the tower structure according to the present invention will be described.

  First, after the foundation 32 required at the construction site is constructed, or in parallel therewith, a joint base assembling operation for assembling the pair of segments 1 and 1 into the ring-shaped segment ring R is performed on the ground. As shown in FIGS. 5 and 6, the joining base 40 has leveled H-shaped steel materials 42, 42... Arranged in parallel on a foundation 41, and slide H-shaped steel materials 43, 43. Place them side by side and fix them with a bullman and integrate them. Thereafter, a sliding plate 44 made of a polytetrafluoroethylene (trademark “Teflon”) plate is placed on the required number of H-shaped steel members 43 for sliding.

  On this joining base 40, a pair of segments 1 and 1 manufactured in advance at the factory are placed with their joining surfaces 3a and 3b facing each other. 4 and 5 show the state immediately before the joining of the two segments 1, and an epoxy resin adhesive is applied to each joining surface 3a, 3b of the segment 1. FIG. Here, an inferior object for adhesion such as latency, mud, water, oil, etc. on the end face is removed and dried to perform the coating operation. The coating operation is performed, for example, with a coating thickness of 2 to 3 mm so that no smear remains.

  Next, as shown in FIG. 5, a lever block 50 is attached between the segments 1 and 1, and the segments 1 and 1 are pulled together. In this case, an insert 51 for tensioning the lever block 50 is installed in advance in the segment 1, and the lever block 50 is stretched between the inserts via a wire, and this is operated, so that a plurality of positions can be obtained. The joint surfaces of the segments 1 are similarly narrowed, and the end surfaces are brought into close contact with each other so that they can be joined together in a so-called zero joint state. At this time, as shown in FIG. 2, the coupler 8 screwed to the anchor PC steel rod 6 on one joining surface 3a is placed in the enlarged diameter portion 7a of the PC steel rod insertion hole 7 on the other joining surface 3b. Let it be inserted.

  Thereafter, an extension PC steel rod 9 for tension is inserted into the PC steel rod insertion hole 7 from the back side of the other protruding portion 4 b, and its tip is screwed into the coupler 8. In this state, the tension extension PC steel bar 9 is tensioned from the back side of the protruding portion 4 b and fixed to the bearing plate 10 by the fixing tool 11. After fixing, the grout filling operation necessary for the PC steel rod insertion hole 7 is performed, and the opening preventing member 38 is fixed between the projecting portions 4b and 4b. The opening preventing member 38 is installed when it is necessary to increase the strength in the design, and is not necessarily required in all cases.

  The segment ring R assembled in this manner is lifted by a crane, and is first stacked on the base portion 32 and then stacked on the uppermost segment ring R that has been previously stacked. Here, as shown in FIG. 7, the temporary PC 52 is installed under the existing segment ring R, and the work space is provided between the lower base portion or the segment ring R, and the lower PC steel. The coupler 25 for the rod 26 or 34 and the upper PC steel rod 26 for the coupler 25 are screwed together.

  Subsequently, the crane is raised using a crane, the temporary table 52 is removed, the segment ring R is lowered to a predetermined position, and the upper and lower segment rings R are joined. At that time, horizontal alignment is performed, and the liner is installed in the horizontal joint gap 30 with the liner interposed therebetween.

  At this time, the vertical bar 23 is inserted into the vertical bar insertion hole 20 of the lower segment, and the lower end thereof is inserted into the filling joint 22 and fixed therein, and the upper end of the vertical bar 23 is connected to the segment. It protrudes from the upper end surface of the ring R, and the upper end of the vertical bar 23 is inserted into the filling joint 22 opened on the lower surface of the segment ring R joined to the upper side.

  After the segment ring R to be newly stacked is joined onto the lower segment ring R in this way, the horizontal joint gap 30 is filled with a filler made of non-shrinkable joint mortar, and the desired filler The steel plate 26 protruding from the upper surface of the segment ring R is tensioned and fixed to the bearing plate through the fixing tool. As a result, the connecting strength of the segment rings R adjacent to each other in the vertical direction is secured, and vertical prestress is applied to the entire tower-like structure.

  After the tension fixing work of the PC steel bar 26, grout is injected into the vertical bar insertion hole 20 into which the vertical bar 23 is inserted and into the PC steel bar insertion hole 21. The grout injection into the filling type joint 22 is performed in parallel with the PC steel rod tension fixing operation or each grout injection operation after the joining operation of the upper segment ring R is completed.

  As shown in FIG. 8 and FIG. 9, these operations are performed in advance with respect to the uppermost part and the lower segment ring R with respect to a scaffold attachment member (not shown) such as an anchor previously installed in the segment. An external suspension scaffold 53 is installed via a fixture (not shown), and an elevator platform 54 is installed below the scaffold 53. Each time one segment ring R is extended upward, an elevator platform 54 is added. To do.

  Thus, by providing the outer suspension scaffold 53 only in the part where the segment ring R is stacked and connected, the scaffold is installed only in the part necessary for the work, and the cost required for the scaffold installation can be greatly reduced. In addition, since there is no external suspension platform other than the uppermost work position, the neighboring residents can check the construction status from the outside without damaging the aesthetics even during construction.

  In this example, the vertical bar insertion hole 20 is opened in the segment, and the vertical bar 23 is inserted when the segment ring R is joined. You may embed in the segment in the state where the lower end was inserted into 22.

It is a simplified top view of the cylindrical single-piece | unit in the tower-like structure of this invention. It is a partial expanded sectional view which shows the segment junction part in FIG. It is a partial abbreviation longitudinal cross-sectional view which shows the vertical line insertion part of a tower-like structure. It is a partial abbreviation longitudinal cross-sectional view which shows the longitudinally oriented PC steel rod penetration part. It is a simplified top view which shows the segment ring assembly state on joining. It is a simplified side view. It is a simplified side view which shows the vertical PC steel bar connection process at the time of segment ring stacking. It is a top view which shows the construction state of a tower-like structure. FIG.

Explanation of symbols

R segment ring 1 segment 2a, 2b joint end 3a, 3b joint surface 4a, 4b protrusion 5 anchor plate 6 anchor PC steel rod 7 PC steel rod insertion hole 7a expanded portion 8 coupler 9 extension PC steel rod 10 for tension Pressure plate 11 Fixing tool 12 Recessed portion 13 Backfill 20 Vertical bar insertion hole 21 PC steel rod insertion hole 21a Expanded portion 22 Filling joint 22a Grout hole 23 Vertical bar 25 Coupler 26 PC steel bar 30 Horizontal joint gap 31 Horizontal joint material 32 Foundation part 33 Anchor plate 34 Anchor PC steel rod 36 Bearing plate 37 Fixing member 38 Unlocking member 40 Joint base 41 Base 42 Leveling H type steel 43 Slide H type steel 44 Slide plate 50 Lever block 51 Insert 53 External suspension scaffold 54 Lifting scaffold

Claims (5)

In a tower-like structure configured by stacking and integrating segment rings assembled in a short cylinder shape by connecting a plurality of segments,
A protrusion is integrally provided on the inside of the joint end of each segment constituting the segment ring inside the segment ring, and the other protrusion is in one of the joint ends joined to each other. An anchor PC steel rod projecting toward the PC is provided, a PC steel rod through hole is formed in the other projecting portion in the extending direction of the anchor PC steel rod, and the anchor PC steel rod passes through the PC steel rod. A tower-like structure characterized in that the segments are integrated with each other by tension fixing to the back side of the other protrusion through a hole.   A tension extension PC steel rod is connected to the tip of the anchor PC steel rod projecting from the one protrusion via a coupler, and the tension extension PC steel rod is connected to the PC steel rod through hole of the other projection. 2. The tower-like structure according to claim 1, wherein the tower-like structure is formed by being penetrated through and fixed to the back side of the other protruding portion.   3. The tower-like structure according to claim 1, wherein a recess for accommodating the PC steel rod fixing member is formed on the back surface of the other protrusion, and the fixing member is embedded in the recess by backfilling.   The segment ring is formed by connecting a pair of segments having a shape that is divided into two equal parts by joining the joint surfaces of both ends of each segment to each other, and opening between the pair of joints where the joint surfaces are joined. The tower-like structure according to claim 1, 2 or 3, wherein a stop member is installed.   Each segment is provided with a vertical PC steel rod insertion hole in the axial direction of the segment ring, and the PC steel rod inserted across the upper and lower segments in the PC steel rod insertion hole is tensioned. The tower structure according to claim 1, wherein the upper and lower segment rings are integrated with each other.

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