JPH0379489B2 - - Google Patents

Description

[Detailed Description of the Invention] (Object of the Invention) The present invention relates to a construction method using a new method for realizing a wooden frame structure in which wooden columns are embedded in a cast concrete layer. be.

(Prior art) The basic structure of wooden buildings, which is Japan's traditional architectural structure, is either constructed using traditional methods or prefabricated methods. This has been achieved by combining foundations with independent foundations.
Furthermore, this type of foundation structure has become almost a fixed structure because it has been designated as a standard construction structure by the regulatory agency, presenting a situation where there is no room for technological progress or development. As a result, most of the improvement technologies are related to prefabricated foundation structures within the prefabricated architectural style, and the basic structural form remains the same as before, either cloth foundations or cloth foundations combined with independent foundations. . However, this existing foundation structure is extremely vulnerable to crustal deformation, as has been reported in damage caused by the Niigata earthquake and Sendai earthquake in the past, and the recent Japan Sea Chubu earthquake. In addition to the disadvantages of the foundation structure itself, which is difficult to resist due to cracks, collapse, and subsidence, and can be destroyed to the point where it is impossible to restore or repair in the event of quicksand phenomena, In terms of the connection structure with the wooden frame, only anchor bolts are used as the connecting members between them, so there is a risk of the wooden frame (foundation) being broken and separated from the connecting member. In addition, during construction, starting from root cutting, forming the footings of the cloth foundation, and forming the rising parts, it is necessary to install formwork, which is quite time-consuming, and the placement of reinforcing bars is difficult. There is a lot of incidental work such as arranging bars and anchor bolts, so it is difficult to save labor in terms of work efficiency, which results in a disadvantage in terms of economic efficiency.

Therefore, in this invention, we have developed and completed a new method of constructing a wooden framework structure that addresses these shortcomings of the conventional foundation structure and combines it with the foundation of a new structure.The structure is described below. This will be explained in detail.

(Structure of the Invention) The construction method of the present invention is such that a column base fixing member having a column base insertion space of a predetermined depth is arranged and fixed in each column split of a wooden column to be erected, and then the column base fixing member The fresh concrete is poured so that all of the concrete is connected and integrated with a single plate-shaped cast concrete layer, and after a specified curing period, the columns of the wooden columns are placed in the column base insertion space of each column base fixing member. Construction of a wooden frame structure in which each wooden column is made independent by inserting legs, while the horizontal members that form the upper structure are assembled and joined, and the base of the wooden column is integrated with the column base fixing member. It's a method.

The wooden pillars used in this construction method are embedded in and connected to the cast concrete layer, resulting in a frame-framed wooden building. Therefore, unless a pillar made of a single piece of wood or laminated wood with a cross-sectional size of about 7 inches square (210 mm x 210 mm), which is considerably larger than the normal column cross-sectional size (3 inches square = 105 mm x 105 mm), is used, the structural strength will be reduced. It will not be effective. Therefore, the column pedestal fixing member is also realized by a metal material having a column pedestal insertion space with a cross-sectional space substantially comparable to the column cross section, depending on its cross-sectional dimension.

By applying a surface finish, the poured concrete layer can serve as the floor surface of the standard floor as it is, or it can also be combined with tumbled joists to form a flooring structure. In addition, the grounding structure of the poured concrete layer can be realized as a monolithic structure consisting of many downward bowl-shaped parts or any other suitable effective structure depending on the shape of the trench and the shape of the laid stones. Ru.

After an appropriate curing period determined by various determining factors such as weather conditions, thickness of poured concrete, curing method, and type of fresh concrete used, the wooden columns are lifted from their bases by cranes or other lifting equipment. is gently inserted into the column base insertion space of the column base fixing member. The insertion length in this case must be determined by structural calculation to determine the optimal value, since the support strength of the column base naturally varies depending on the length of the wooden column used for two-story buildings, one-story buildings, etc. , two-story,
Assuming that the eaves are 6m high, the roof is long and colored tin, and the construction area is Yamagata Prefecture, if 210mm square (7 sun square) wooden columns are used, an insertion length of approximately 600mm will be required.

The wooden column inserted and supported by the column base fixing member in this way stands safely and reliably on its own, and does not require any special support material, although the wooden column is tilted slightly in either direction. (However, depending on the strength of the poured concrete, a construction method may be adopted in which appropriate supporting materials are used in combination for safety to further shorten the construction period.) (Example) Figure 1 1 shows a typical example of the column base fixing member 1 used in carrying out the construction method of the present invention.

The column base fixing member 1 has a fixing member 12 on the bottom in which a fixing part 13 such as a fixing fitting for the foundation plate 2, such as an insertion hole for an anchor bolt 21, is formed, and is usually made of a single flat steel plate. The column base insertion member 11, which has a column base insertion space 14 in the center of its upper surface and has a length that reaches above the ground surface, is made of, for example, a cylindrical steel member, and is integrated by means such as welding. It is constructed by standing upright. The column base insertion space 14 of this column base insertion member 11 is a hollow rectangular tube type as shown in the perspective view of FIG. 1, or four flat steel plates bent into an L shape (not shown). In addition to those that form a rectangular column base insertion space and seal the corners, or those that combine two sets of L-shaped flat cross-section bent plates, in some cases, hollow cylindrical and other types are used. Of course, there is no problem even if it has a hollow cross section, and when pouring concrete,
Any structure can be used as long as it can secure the column base insertion space 14 reliably. Further, a column base connecting portion 15 such as a bolt insertion hole is formed near the upper end of this column base insertion member 11, so that the column base inserted and fitted into the column base insertion space 14 can come out from the same place. Connect and secure so that it does not get cluttered.

FIG. 2 shows a partially omitted cross-sectional view of a wooden frame structure realized by the construction method of the present invention.

The column base fixing members 1, 1, . , each column base fixing member 1, 1...
... will maintain accurate position and supporting strength by this single plate-shaped cast concrete layer 4.

In this state, the wooden columns C, C... are sequentially inserted into the column base fixing members 1, 1... to make them free-standing, and even if the clearance between the column base insertion space 14 and the column base is used, the column capital or Horizontal members B, B, etc., such as girders and beams, are bridged and connected to the column capital and the intermediate portion, and the column base is integrated with the column base fixing member 1 using fixing bolts 16.

(Embodiment 1) Although it is possible to arrange and fix the column base fixing member 1 by simply forming a layer of leveled mortar on the split stone 22, ideally, If the anchor bolts 21 are used to place and fix the foundation 2 on a ready-made or cast-in-place foundation 2, as shown in the example shown in , extremely safe construction can be achieved, and it is also advantageous in terms of supporting strength. Therefore, it becomes convenient.

(Embodiment 2) Furthermore, this column base fixing member 1 is itself reinforced and integrated with a single plate-shaped cast concrete layer 4, thereby realizing a sufficiently safe foundation structure. However, when it is necessary to realize a more solid foundation structure, it is possible to connect the column base fixing members 1, 1... before forming the poured concrete layer 4, as in the illustrated embodiment. The purpose can also be achieved by connecting the members 3, 3, . . . in advance. This configuration is also effective in determining the positions of the column base fixing members 1, 1..., and prevents the installation positions of the column base fixing members 1, 1... from shifting due to impact during concrete pouring. It also serves the function of regulating the situation so that it does not occur.

In the figure, numeral 41 indicates the split stone below the cast concrete layer 4.

(Operation and Effect) The construction method of the present invention having the configuration as described above has the following features.

In other words, since no formwork is required at the foundation formation stage, not only is there no need for consumable parts such as formwork and separators, but the work costs for formwork and its removal are also saved, and the construction period is reduced. By devising the work procedure (from forming the foundation plate to forming the V-shaped groove), the work for pouring concrete will be simplified, which will be advantageous in terms of cost and construction period.
Without affecting work efficiency due to soil removal,
Smooth work can be carried out, safe work is guaranteed, and although the amount of concrete poured is slightly larger than that using conventional technology, the cost reduction in the above items etc. reduces the amount of concrete used. The increase in raw material costs is more than compensated for, and once the poured concrete surface has passed the required curing period, it can be used as a flat work surface, making processing and assembly of frame structural materials and other materials more efficient. The pillars can be erected safely (allowing the entry of crane trucks, etc.), and the pillars themselves can be temporarily erected by inserting the column base fixing member into the column base insertion space. Since the building can stand on its own (instead of completely safe), erection work can be done quickly and safely. Therefore, by predetermining the column division into a predetermined grid, the frame structural members or their associated members can be divided into beams or rows, or in some cases, can be divided into three-dimensional grids. It has a number of features that have not been found in previous construction methods for wooden frame structures, such as the fact that it is extremely easy to create units into prefabricated architectural styles.

In addition, the wooden frame structure realized by the construction method of the present invention has a structural feature that the connection structure between the columns and the foundation structure is completely embedded, so it is less susceptible to external forces. There will be no risk that the foundation and superstructure will separate or break due to earthquakes, and all structural members of the floor structure, such as foundations, daihiki, flint foundations, bundles, and rooting materials, will be removed. Even though it is not necessary, an extremely sturdy undercarriage structure can be achieved in terms of structural strength, and furthermore, a large cross-section (for example, around 210 mm square) should be adopted for the frame structure including columns. This makes it possible to achieve a specified structural strength without using any braces, which not only has the advantage of omitting the work of installing braces, but also provides benefits in terms of space utilization, such as flexibility in room allocation and improvements in extensions and renovations. The frame structural members are completely isolated from the ground surface, completely preventing damage from pests such as termites, and moisture from the ground is not propagated, preventing corrosion and deterioration. As a construction method for wooden frame structures that is compatible with Japan's climate, it not only greatly contributes to shortening the construction period and reducing construction costs, but also It is also an excellent invention in that it improves the structural strength of the wooden frame structure completed by the construction method.

[Brief explanation of drawings]

The drawings illustrate typical structures necessary to explain the construction method of the present invention, of which Figure 1 is a perspective view showing the column base fixing member, and Figure 2 is a perspective view showing the construction method of this invention. FIG. 2 is a partially omitted cross-sectional view of a wooden frame structure completed by the method. 1... Column base fixing member, 11... Column base insertion space, 2...
Foundation board, 4...Poured concrete layer, B...Horizontal member, C
...Wooden pillar.

Claims (1)

[Claims] 1. A column base fixing member having a column base insertion space of a predetermined depth is arranged and fixed in each column division of a wooden column to be erected, and all of the column base fixing members are made of one piece. Place fresh concrete so that it is connected and integrated with a plate-shaped poured concrete layer, and after a predetermined curing period, insert the column base of the wooden column into the column base insertion space of each column base fixing member. A method of constructing a wooden frame structure in which each wooden column is made to stand on its own while assembling and joining the horizontal members forming the upper structure, and the base of the wooden column is integrated with the base fixing member. 2. The method of constructing a wooden frame structure according to claim 1, wherein the column base fixing members are arranged and fixed on each foundation plate formed in advance below the ground surface. 3. The method for constructing a wooden frame structure according to claim 1, wherein the arrangement and fixation of the column base fixing members are carried out in combination with tie members.