JP2008017722A - Tree-fixing structure of building, and structural design method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tree-fixing structure of a building enhancing safety in stationary load of a building, wind-resistant safety and earthquake safety, and preventing a planted tree from falling down, dropping down and scattering from the building. <P>SOLUTION: The tree-fixing structure of a building is provided with column legs 2 standing on the beams 1 of a building 100, a lattice frame 3 fixed on the column legs 2, a bottom plate 12 fixed on the column legs 2 or the lattice frame 3, and a binding means 8 enabling fixation of the root ball of a tree 5 supported by the bottom plate 12 and laid in soil 7 on the bottom plate 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tree fixing structure of a building that transmits a tree load to a beam of the building, and a structure design method thereof.

  More specifically, the present invention relates to a tree fixing structure of a building in which a tree is fixed to a steel frame standing on a beam of the building, and a structural design method for modeling the tree.

  In recent years, it has been preferred to plant a natural landscape with plants by planting flowers and trees on the rooftop or balcony of a building and planting them. This so-called greening of buildings is widely encouraged because it has the effect of reducing urban warming.

  By the way, there are many things that do not block direct sunlight on the rooftop or balcony of a building, so it is not so good as an environment where people can stay and relax.

  For this reason, there is an idea of creating a comfortable environment by planting trees on the rooftop or balcony of a building to create shade (shade), thereby blocking direct sunlight and reducing reflection from the floor.

  However, the depth of soil to be planted is often light soil due to restrictions on the building load, and the force to hold down tree roots is weak. Moreover, the root pot is spherical at the initial stage of planting trees, and the roots are not sufficiently prosperous. For this reason, trees are likely to fall down on the rooftop or balcony of a building that is generally windy and has a large earthquake shake.

  In addition, when planting relatively tall trees (so-called mid-trees and high trees) that require medium or higher heights that require rooting depth, the overall loading load that the trees and soil have on the building increases. Measures to do this and measures to support local concentrated loads are necessary.

  On the other hand, in Patent Document 1, in a tree fixing structure of a building in which the depth of soil to be planted is restricted, the roots of planted trees are used in order to make the planted trees stand permanently against wind and earthquake. A method of fastening a bowl with a belt or base equipment is disclosed.

  Patent Document 2 discloses a method in which a steel angle laid under a planted tree and an intermediate part of the planted tree are connected with a wire.

  Patent Document 3 discloses a method in which a large planter separate from a building is placed directly above a beam of the building and planted on the planter.

JP 2000-23579 A Registered Utility Model No. 3022801 Japanese Utility Model Publication No. 06-058056

  However, in the methods disclosed in Patent Documents 1 to 3, heavy objects such as planted trees, bundling / fixing equipment or soil are not fixed to a skeleton such as a beam of a building and are not reflected in the structural design. For this reason, a heavy object placed on the building gives a locally concentrated load outside the design to the building, and the building may be damaged due to, for example, deformation or strain of the building skeleton. As a result, there are concerns about the safety against constant loads of buildings and the safety against earthquakes and typhoons.

  Moreover, in the method disclosed in Patent Document 1, the shoulder rest member that fixes the root pot is bolted in the soil, and the position of the shoulder rest member is periodically readjusted as the planted tree grows. Otherwise, the root pot may be insufficiently fixed, and there is a problem in maintaining a safe fixed state of trees (long-term durability).

  Moreover, in the method disclosed in Patent Document 2, since the root pot of the planted tree is not fixed, the planted tree may fall down due to wind or earthquake.

  In addition, in the method disclosed in Patent Document 3, a large planter that is not tied to a building rolls over due to wind or an earthquake, and in some cases falls from the building together with planted trees, or is scattered to neighboring houses, etc. There is a fear.

  Accordingly, the present invention provides a tree fixing structure for a building that can improve the constantly load safety, wind resistance safety, and earthquake safety of the building, and can prevent fall of the planted tree, falling from the building, and scattering. The purpose is to provide.

  (1) In order to solve the above problems, a first configuration of a tree fixing structure of a building according to the present invention includes a column base standing on a beam of a building, a lattice frame fixed on the column base, A base plate fixed on the column base or the lattice frame, and a binding means capable of fixing a root pot of a tree supported by the base plate and embedded in soil on the bottom plate to the lattice frame. And

  (2) Moreover, the 2nd structure of the tree fixing structure of the building which concerns on this invention is a tree fixing structure of the building of the said 1st structure, The said binding means is the 1st binding means and the 2nd binding Means, and the first bundling means is a belt that spans the root pot and fixes the root pot to the lattice frame, and fastens the belt to bind the root pot to the lattice frame. The second binding means is a belt that spans the root pot and fixes the root pot to the lattice frame, and tightens the belt even after the binding means is broken. And a bundling member excellent in long-term durability for bundling the root pot to the lattice frame.

  (3) Further, a third configuration of the tree fixing structure of the building according to the present invention is the tree fixing structure of the building of the first or second configuration, wherein the fastening means includes a rotating shaft that winds up the belt; An inversion prevention mechanism for preventing inversion of the rotating shaft.

  Here, the belt described in the above (2) and (3) is made of a material such as a chemical fiber, which has a predetermined breaking strength and a durability equal to the service life of the building component. .

In general, the belt is a belt-like long belt, but the belt referred to in the present invention is not limited as long as it can be stretched over a root pot and the root pot can be fixed to the lattice frame. This includes long ropes. For example, steel wire. In this case, as the binding means of the first binding means and the binding member of the second binding means, those capable of handling such a long rope-like thing are used.

  (4) Moreover, the 4th structure of the tree fixing structure of the building which concerns on this invention is a tree fixing structure of the building in any one of said 1st-3rd structure, The useful life of the said binding member is a building's lifetime. It is the same as the useful life of the component.

  (5) Moreover, the 5th structure of the tree fixing structure of the building which concerns on this invention is a tree fixing structure of the building in any one of said 1st-4th structure. WHEREIN: On the said grid frame or the said column base A peripheral wall is fixed, and a bottomed box for storing the root pot and the soil is provided.

  (6) Moreover, the structure design method of the tree fixing structure of the building which concerns on this invention applies the total load of the structural member of the tree fixing structure of the building in any one of said 1st-5th to the said beam Load capacity, seismic force is determined as the load generating the seismic shear force, wind pressure is determined by considering the tree contour as spherical, and based on the load capacity, seismic force, wind pressure The structural design of the tree fixing structure of the building according to any one of the first to fifth aspects is performed.

  (1) By said 1st structure, the fall of the planted tree, the fall from a building, and scattering can be prevented, and the constant load safety | security of a building, wind-proof safety, and earthquake safety can be improved.

  (2) Moreover, by said 2nd structure, the fall of the planted tree, the fall from a building, and scattering can be avoided over a long period of time after destruction of the fastening means of Claim 2 by the corrosion in soil. That is, it is possible to prevent the root pot from being insufficiently fixed as the planted tree grows, and to increase the long-term durability of maintaining a safe fixed state of the tree.

  (3) In addition, with the third configuration, the root pot can be fixed easily and firmly, and moreover, when the building is in an earthquake or a typhoon, the planted tree falls, falls or scatters from the building. It can be surely prevented.

  (4) Moreover, by the said 4th structure, the fall of the tree planted for the same years as the lifetime of the structural member of a building, the fall from a building, and scattering can be avoided.

  (5) Moreover, since the planar lateral extension of the root portion of the tree can be limited to the box by the fifth configuration, the area occupied by the root of the tree can be reduced. Also, as the tree grows and grows over time, the roots grow densely inside the box and become compressed, preventing the root pot from rotating and moving in the box, It is possible to obtain a tree fixing structure in a building that is more difficult to fall.

  (6) In addition, the structural design of the tree fixing structure of the building is used to design a structure having a tree fixing structure that ensures constant load safety, wind safety, earthquake safety, and long-term durability. be able to.

  DESCRIPTION OF EMBODIMENTS Embodiments of a structure fixing method for a building and a structure fixing method for a tree structure according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a tree fixing structure S of a building in which planted trees are fixed. FIG. 2 is a plan view of the box 10. FIG. 3 is a schematic diagram showing a structure in which planted trees are fixed to a building and root pots 6 are bound.

  As shown in FIG. 1, the building tree fixing structure S of the present embodiment is provided on the roof or balcony of the building 100. The tree fixing structure S includes a beam 1, a column base 2, a box 10, and a binding means 8.

  As the beam 1, a beam located under the floor 4 of the building body of the building 100 is used. The frame of the present embodiment has a steel frame structure in which column beams are assembled and covered with a floor (roof) panel and an outer wall panel.

  The column base 2 is erected by being bolted to the upper surface of each beam 1. The height of the tree fixing structure S can be changed by changing the length (height) of the column base 2.

  As shown in FIGS. 1 and 2, the box body 10 has a bottomed box shape with an upper end opened by a lattice frame 3, a bottom plate 12 as a bottom surface, a first side plate 19 a and a second side plate 19 b as peripheral walls. Is formed. The box 10 stores the root pot 6 of the tree 5, the bundling means 8, the soil 7 in which the root pot 6 is embedded, and the like.

  The lattice frame 3 is a quadrangular frame member that is bolted onto the column base 2 and is formed of four hollow rod-shaped square members that connect the column base 2. In addition, eyebolts 16 are fixed to upper portions of the four corners of the lattice frame 3.

  The bottom plate 12 is a quadrangular plate material having strength to support the trees 5 and the soil 7, and is inserted into the lattice frame 3 and fixed to the column base 2 with bolts. The bottom plate 12 may be bolted on the lattice frame 3.

  A water retention mat 11 is laid on the bottom plate 12, and the root pot 6 of the tree 5 is fixed on the water retention mat 11. The water retention mat 11 laid on the bottom of the box 10 has a function of draining excess water as well as a water retention function, and appropriately maintains the moisture in the soil 7 filled in the box 10.

  The bottom plate 12 is provided with ventilation / drainage holes 13, and further a space 9 is provided under the box 10. The ventilation / drainage hole 13 is located at the lowermost part of the soil 7 filled in the box 10 and ventilates the root of the tree 5 and drains excess irrigation water.

  The space 9 below the box 10 holds the opening of the vent / drain hole 13 in the air. Thereby, rather than the bottom of the box 10 being in close contact with the floor 4 of the building, the ventilation / drainage function of the bottom of the box 10 is better maintained, and the long-term stable growth / prosperity of the tree 5 is promoted. .

  The first side plate 19a is a flat plate formed in a substantially U shape with its left and right sides bent at a right angle. The second side plate 19b is a flat plate having the same height as the first side plate 19a. The first side plate 19a and the second side plate 19b are bolted to the lattice frame 3 at the lower ends.

  The first side plate 19a and the second side plate 19b are connected to each other at the straight side, not at the corner bent portion. In this way, the connection is made while avoiding the corner bends, so that not only the connection structure of the butted portions is simplified, but the length (width) of the flat plate-like second side plate 19b is variously arranged in various lengths, and the first side plate 19a. In combination, the volume of the box 10 can be increased or decreased, and the planar shape can be arbitrarily selected such as a square or a rectangle.

  The binding means 8 fixes the root pot 6 of the tree 5 embedded in the soil 7 in a state of being supported on the bottom plate 12 (water retaining mat 11) to the lattice frame 3. As shown in FIG. 3, the bundling means 8 has a first bundling means 8a and a second bundling means 8b.

  The first bundling means 8a includes a lifting belt 20 that spans the root pot 6 and fixes the root pot 6 to the lattice frame 3, and a fastening means 8c that tightens the lifting belt 20 to bind the root pot 6 to the lattice frame 3. ,have. A belt winch 15 is used as the fastening means 8c.

  FIG. 4 is a view showing the belt winch 15. As shown in FIG. 4, the belt winch 15 includes an annular portion 15a, a rotating shaft 15b, and a reverse prevention mechanism (gear 15c, stopper 15d). A trunk winding belt 17 wound around the trunk of the tree 5 is passed through the annular portion 15a. Around the rotating shaft 15b, the other end of the lifting belt 20 is wound around the eye winch 16 with one end fixed to the belt winch 15.

  The pulling belt 20 is wound up by rotating the rotary shaft 15b with a wrench, and the root pot 6 is tightened. At this time, the gear 15c rotates by pushing up a stopper 15d biased toward the gear 15c by a spring. With the wrench removed, the gear 15c meshes with the stopper 15d so as not to rotate in the direction opposite to the tightening direction, so that the state where the root pot 6 is tightened can be maintained.

  In this way, the belt winch 15 can prevent the fall of the tree 5 by fastening the root pot 6 to the lattice frame 3, and prevents the tree 5 including the root pot 6 from scattering from the support portion of the bottom plate 12. obtain. Further, the tension of the pulling belt 20 (fixing strength of the root pot 6) can be easily readjusted by the belt winch 15.

  The second bundling means 8b includes a pulling belt 20 that spans the root pot 6 and fixes the root pot 6 to the lattice frame 3, and after the tightening means 8c is broken, the pulling belt 20 is tightened and the root pot 6 is latticed. And a bundling fitting 18 as a bundling member 8d having excellent long-term durability for bundling with the frame 3. One end of the lifting belt 20 a is tied to the trunk winding belt 17, and one end of the lifting belt 20 b is tied to the eyebolt 16.

  The belt is made of a material such as a chemical fiber, which has a predetermined breaking strength and has a durability equal to the service life of a building component. In general, the belt is a belt-like long belt, but the belt referred to in the present invention is not limited as long as it can be stretched over a root pot and the root pot can be fixed to the lattice frame. This includes long ropes. For example, steel wire. In this case, as the binding means of the first binding means and the binding member of the second binding means, those capable of handling such a long rope-like thing are used.

  FIG. 5A and FIG. 5B are a perspective view and a cross-sectional view of the binding metal fitting 18. As shown in FIG. 5, the binding metal fitting 18 is composed of two flat plates 18a and 18b. The flat plates 18a and 18b are provided with slits 18a1, 18a2, 18b1 and 18b2.

  With the flat plates 18a and 18b overlapped, the leading ends of the lifting belt 20a tied to the trunk belt 17 are passed through the slits 18a1 and 18b1. Then, it passes through the outer side of the flat plate 18b and passes through the slit 18a1 from the direction opposite to the direction first passed through the slit 18a1. Similarly, the tip of the lifting belt 20b tied to the eyebolt 16 is again passed through the slit 18b1 through the slits 18a2 and 18b2. Finally, the tip of the lifting belt 20 is pulled, and the lifting belt 20 is tightened to firmly fix the root pot 6 as shown in FIG.

(How to fix trees to buildings)
Next, a method for fixing trees to a building will be described. FIG. 6 is an explanatory diagram of a method for fixing a tree to a building. As shown in FIG. 6A, first, the column base 2 is bolted to the flange of the beam 1 protruding from under the floor 4 of the building 100.

  After the column base 2 is installed, a waterproof member such as a waterproof sheet 4a is reinforced on the floor (a veranda / balcony or roof surface) 4 under the box body 10 to be waterproofed by bacteria, mold, moss, etc. Prevents water leakage due to long-term damage and deterioration of components. As a result, maintenance work in a narrow space under the box 10 that is difficult for humans to enter can be avoided, and a tree fixing structure of a building excellent in long-term durability can be obtained.

  Next, as shown in FIG. 6B, the lattice frame 3 is bolted onto the column base 2, and the bottom plate 12 is inserted into the lattice frame 3 to be bolted onto the column base 2. The water retaining mat 11 is placed on the bottom plate 12. As shown in FIG. 6C, the first side plate 19 a and the second side plate 19 b are attached to the lattice frame 3 to assemble the box body 10, and the eyebolts 16 are fixed to the four corners in the box body 10.

  One end of the first bundling means 8a (the lifting belt 20) is fixed to the belt winch 15, and the other end of the lifting belt 20 is fixed to the rotating shaft 15b through the eyebolt 16. Further, one end of the second bundling means 8b (the lifting belt 20a) is fixed to the eyebolt 16, and the other end of the lifting belt 20a is attached to the bundling bracket 18.

  Then, the root pot 6 is put in the box body 10, and the soil 7 is filled in the box body 10 so as to cover the root pot 6. The trunk winding belt 17 is wound around the trunk of the tree 5 placed in the box 10 so as to pass through the annular portion 15a. A protective pad 14 is applied between the shoulder of the root pot 6 and the lifting belt 20 to protect the root pot 6, and then the lifting belt 20 is wound up by a belt winch 15, and the root pot 6 is tied to the lattice frame 3 to form a tree. Prevent 5 from falling.

  Further, the other end of the second bundling means 8b (the lifting belt 20b) is connected to the trunk winding belt 17 to complete the tree fixing of the building.

(service life)
The belt winch 15 is made of iron and has a service life of 2 to 5 years in a state where it is subjected to corrosion in the soil.

  The binding metal fitting 18 and the box body 10 are made of stainless steel or the like that is not easily deteriorated by corrosion over time and is excellent in long-term durability. The service life of the bundling bracket 18 and the box 10 in the state of being corroded in the soil is about 30 years.

  The trunk winding belt 17 and the pulling belt 20 are made of polyester or the like that is resistant to corrosion over time and has excellent long-term durability. The service life of the trunk winding belt 17 and the lifting belt 20 in the state of being corroded in the soil is about 30 years.

  2 to 5 years after the formation of the tree fixing structure S, the belt winch 15 is corroded by the action of moisture in the soil 7 and the soil 7, whereby the tension of the first binding means 8a is gradually reduced, In the long term, it loses the function of binding the root pot 6 to the lattice frame 3. Here, from the viewpoint of long-term durability, it is ideal to use a belt winch 15 having a long service life. However, since the belt winch 15 has a complicated shape, the belt winch 15 has a complicated shape. Such a belt winch 15 is not produced.

  Therefore, the bundling member 18 is made of a material (for example, stainless steel) that does not have a function to be tightly bonded but is resistant to corrosion and aging and has excellent long-term durability.

  Thereby, even when the belt winch 15 loses the function of binding the root pot 6, the root pot 6 can be bound to the eyebolt 16 by the binding metal fitting 18. Therefore, even if the belt winch 15 cannot prevent the fall of the tree 5, the bundling bracket 18 causes the tree 5 to jump out of the building with the root pot for a long period of time (at least during the period in which the building is maintained and managed). Even in this case, it is possible to avoid falling from the building or scattering to neighboring houses.

  Moreover, even if the tension | tensile_strength of the 1st binding means 8a reduces gradually because a root grows thick, the tree 5 becomes difficult to fall down. Therefore, it becomes possible to prevent the root pot from being insufficiently fixed as the planted tree grows, and to increase the long-term durability of maintaining a safe fixed state of the tree.

  In order to ensure constant load safety, wind safety, earthquake safety, and long-term durability of the tree-fixing structure of the building, the bundling member 8d is “long-term durable” according to the useful life of any component of the building. Select one that is “excellent”.

  In other words, “excellent in long-term durability” as used herein means that the service life of the binding hardware is the same as or longer than the service life of the building components. The “service life” is the service life scheduled in the design or production stage of the member, and generally the life is predicted by a deterioration promotion test or the like. Each member is a member whose service life is predicted by an accelerated test for deterioration diagnosis.

  The accelerated test for deterioration diagnosis refers to a weather resistance test, a foreign object contact test, an environmental load test, and the like of a basic building frame. For example, the steel member confirms the progress of rusting, and the concrete confirms the progress of neutralization of the reinforcing bar by a predetermined cored sample. For exterior wall spraying materials, roofing materials, or tarpaulins, which are exteriors of buildings, surface changes and shrinkage amounts are subject to weather resistance tests using metal halide, sunshine weather, xenon weather, and other testers, and exposure to Arizona light collectors. Done with.

  In addition to the accelerated test, it is also possible to predict the progress of deterioration of the member by computer simulation.

  For example, steel column members, beam members, and the like, which are constituent members of the basic frame of a building, are selected to have a useful life of 60 years, and the useful life of the bundling member 8d is a component of the basic frame. It is preferable to have the same level as that of a steel column or beam.

  Further, if the building is planned to be regularly replaced or repaired by the maintenance program even if it is not such a long period (see JP-A-159159190), the building exterior component (waterproof sheet, For the spraying material), members with a service life of 15 years, 20 years, or 30 years are selected, so that the service life of the bundling member is the same as that of the exterior components, and is checked together with the exterior. Convenient.

  In this way, by setting the useful life of the bundling member 8d to be equal to or greater than the useful life of the building, at least during the use of the building (the period during which the building is maintained and managed), the tree 5 can be used even during an earthquake or typhoon. It is possible to avoid jumping out from the building with the root pot, falling from the building, or scattering to neighboring houses.

(Structural design method for building tree fixing structure)
Next, the structural design method of the tree fixing structure of the building will be described. Fig.7 (a)-FIG.7 (f) are the schematic diagrams which classified the general tree form with the outline of the branches and leaves. FIG. 8 is a schematic diagram showing a representative model of the form of a tree to be planted. FIG. 9 is a schematic diagram of a spherical model for structural design of a tree fixing structure of a building.

Typical shapes of the tree form are the conical shape in FIG. 7 (a), the inverted conical shape in FIG. 7 (b), the cylindrical shape in FIG. 7 (c), the hemispherical shape in FIG. 7 (d), and FIG. ) In the reverse hemisphere, the spherical shape in FIG. Among these, when examining the tree form that a wide shade (shade) can be made efficiently with less burden of wind pressure and weight applied to the building frame,
Desirable tree forms for planting on the rooftop, veranda, or balcony are those that allow a person resting on the rooftop, veranda, or balcony to approach the bottom of the tree and enter the shade (shade).

  Specifically, it is preferable that the bottoms of the contours of branches and leaves as shown in FIGS. 7B, 7D, and 7F are not horizontal. Therefore, reverse cone shape, reverse hemispherical shape, and spherical shape are selected as tree shapes suitable for rooftop, veranda or balcony planting.

  Next, modeling for representative structural calculation of tree morphology will be described.

  As shown in FIG. 8, when the tree trunk height H1 is the same length as shown in FIG. 8, both the inverted conical shape of FIG. 8 (a) and the inverted hemisphere of FIG. There is nothing, and it can be considered spherical because it swells in a spherical shape. Therefore, a tree suitable for planting a rooftop, a veranda or a balcony can be representatively represented by a spherical model.

  Here, as a tree, as shown in FIG. 9, a tree having a spherical branch and leaf outline was selected. The dimensions suitable for planting on the rooftops of trees are as follows: tree root height Hp: about 600 mm, tree trunk height H1: 1000 mm, bottom height of branches and leaves outline Hp + H1: about 1600 mm, necessary branches and leaves The maximum diameter D of the contour is about 2000 mm. Considering that the height H2 of the branches and leaves is equal to the maximum diameter D, the height H1 + H2 of the tree is about 3000 mm. Hs is about 50 to 200 mm.

  There are three types of loads and external forces that are transmitted to the beam 1 of the building through the column base 2 by the Nakagi: the load W, the seismic force Q, and the wind pressure P.

  The loaded load W is the total load of the column base 2, soil 7, tree 5, bundling means 8, box 10, etc., and is transmitted to the beam 1 in the vertical direction.

  As for the seismic force Q, the tree 5 is regarded as a rigid body and is tightly coupled to the lattice frame 3, so the load W at the upper end of the lattice frame 3 generates an earthquake shear force.

  The wind pressure P is designed according to the Building Standard Act, the Building Standard Act Enforcement Order, etc. by setting the following model.

Assuming that the velocity pressure q (N / m ² ), the wind force coefficient Cf, and the pressure receiving area A (m ² ) of the tree, the wind pressure P (N) is expressed by the following equation (1): P = q · Cf · A ( 1)
The speed pressure q (N / m ² ) is q = 0.6 EV ₀ ² (2). E is a coefficient indicating the distribution of the velocity pressure in the height direction, and V0 is the reference wind speed in the region, which prescribes the method and numerical values calculated by the minister.

The pressure-receiving area A of the tree is A = π (D / 2) ² (3) where the tree 5 is considered to have a spherical outline shape with a diameter D and is expressed by the following equation (3).

  In addition, the value of the wind power coefficient Cf in the formula (1) is determined by a wind tunnel experiment or a numerical value determined by the minister, and in this example, in order to derive the value of the wind power coefficient Cf, Hc (from the ground surface) shown in FIG. This is a coefficient that is closely related to the value of the distance to the center of the tree and the value of H2 (= D: the diameter of the tree 5). That is, the value of the wind power coefficient Cf is a numerical value derived using Hc and H2 (see Building Standard Law Enforcement Order Article 87 and Notification No. 1454 No. 1454).

  By such a structural design method for a tree fixing structure of a building, it is possible to perform a structural design of a building having a tree fixing structure that ensures constant load safety, wind resistance safety, earthquake safety, and long-term durability.

(effect)
According to the present embodiment, heavy objects such as planted tree 5, soil 7, column base 2, box 10 are fixed to a skeleton such as beam 1 of building 100 and reflected in the structural design. Therefore, since the structural influence of the loaded heavy object is designed on the assumption that the building 100 is initially constructed, it is possible to prevent deformation, distortion, damage, and the like of the building skeleton caused by applying a localized concentrated load. As a result, the constant load safety and earthquake safety of the building can be enhanced.

  Moreover, the bundling means 8 can enhance the wind-resistant safety of the building, and can prevent fall of the planted tree, falling from the building, and scattering.

  Further, since the box 10 is provided, the planar lateral spread of the root of the tree 5 can be limited to the box, so that the area occupied by the root of the tree 5 can be reduced. In addition, when the tree 5 grows and grows over time, the roots grow densely inside the box and become a compacted state to prevent the root pot 6 from rotating or moving in the box by being sandwiched between the side plates of the box 10. Thus, a tree fixing structure of the building in which the tree 5 is more difficult to fall is obtained.

(Other embodiment: structure without the box 10)
As shown in FIG. 10, the box 10 (the first side plate 19 a and the second side plate 19 b serving as the peripheral walls) is omitted, only the lattice frame 3 and the bottom plate 12 are provided, and the root pot 6 is placed on the water retention mat 11. It is good also as a structure which puts and the soil 7 was piled up.

  INDUSTRIAL APPLICABILITY The tree fixing structure of a building and the structural design method of the tree fixing structure of the present invention can be suitably used in the field of planting trees and greening the rooftop or balcony of the building.

It is a schematic diagram which shows the tree fixation structure of the building which fixed the planting tree. It is a top view of a box. It is a schematic diagram which shows the structure which fixes a planting tree to a building and unites a root pot. (A) It is a top view of a fastening means. (B) It is sectional drawing of a fastening means. (A) It is a perspective view of a binding member. (B) It is sectional drawing of a binding member. It is explanatory drawing of the tree fixing method of a building. It is the schematic diagram which classified the general tree form with the outline of branches and leaves. It is a schematic diagram which shows the representative model of the form of the tree to plant. It is a schematic diagram of a spherical model for structural design of a tree fixing structure of a building. It is a schematic diagram which shows the tree fixing structure of the building which fixed the planting tree which concerns on other embodiment.

Explanation of symbols

GL ... Ground surface P ... Wind pressure Q ... Seismic force S ... Tree fixing structure W ... Loading load 1 ... Beam 2 ... Column base 3 ... Grid frame 4 ... Floor (veranda, balcony or roof surface)
4a ... waterproof sheet 5 ... tree 6 ... root pot 7 ... soil 8 ... binding means 8a ... first binding means 8b ... second binding means 8c ... binding means 8d ... binding member 9 ... space 10 ... box 11 ... water retention Mat 12 ... Bottom plate 13 ... Ventilation / drain hole 15 ... Belt winch 16 ... Eye bolt 17 ... Stem winding belt 18 ... Bundling bracket 19a ... First side plate 19b ... Second side plate 20 ... Lifting belt 100 ... Building

Claims (6)

Column bases erected on the beam of the building,
A lattice frame fixed on the column base;
A bottom plate fixed on the column base or the lattice frame;
A tree fixing structure for a building, comprising: a bundling means that can fix a root pot of a tree supported by the bottom plate and embedded in soil on the bottom plate to the lattice frame.
The bundling means includes a first bundling means and a second bundling means,
The first binding means includes a belt that spans the root pot and fixes the root pot to the lattice frame, and a fastening means that tightens the belt and binds the root pot to the lattice frame. ,
The second binding means includes a belt that spans the root pot and fixes the root pot to the lattice frame, and the belt is fastened to the lattice frame by tightening the belt even after the binding means is broken. The tree fixing structure for a building according to claim 1 or 2, comprising a binding member excellent in long-term durability for binding.
2. The tree fixing structure for a building according to claim 1, wherein the binding means includes a rotating shaft that winds up the belt, and an inversion prevention mechanism that prevents inversion of the rotating shaft.
The tree fixing structure for a building according to any one of claims 1 to 3, wherein the service life of the binding member is approximately the same as the service life of the building component.
The peripheral wall is fixed on the grid frame or the column base, and a box with a bottom for storing the root pot, the soil, and the like is provided. Tree fixing structure of the building described.
The total load of the structural members of the tree fixing structure of the building according to any one of claims 1 to 5 is defined as a load applied to the beam,
Seismic force is calculated assuming that the above-mentioned loaded load generates seismic shear force,
The wind pressure is determined by regarding the outline shape of the tree as a sphere,
The structural design method for a tree fixing structure of a building according to any one of claims 1 to 5, wherein the structural design of the tree fixing structure for a building according to any one of claims 1 to 5 is performed based on the load load, the seismic force, and the wind pressure. .

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