JP2015010327A - Supporting structure for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supporting structure for a structure, which can reliably receive and support a long-term horizontal load by a relatively small foundation part, without upsizing the foundation part in itself.SOLUTION: A supporting structure for a structure makes a long-term vertical load V and a long-term horizontal load H act on a foundation part 2. An earth retaining part 3 for receiving ground on the lateral side of the foundation part 2 is provided in the state of being integrated with the foundation part 2. Structurally, the long-term horizontal load H is borne by back ground of the earth retaining part 3.

Description

  The present invention is not a short-term load that acts in the short term due to typhoons or earthquakes, but a long-term load that acts in the long term due to the weight of the structure, snow accumulation, etc. The present invention relates to a structure for supporting a structure that applies a load to a base portion.

As a support structure for a structure provided with such a foundation part, a structure in which a concrete foundation part is integrally provided with respect to a retaining wall used for the construction of the foundation part is conventionally known (for example, , See Patent Document 1).
Moreover, what provided the concrete-made foundation part integrally with the earth retaining wall installed in the state which cuts the inclined surface of a mountain is also known (for example, refer patent document 2).

JP 2012-31678 A Japanese Patent Laid-Open No. 6-248653

However, the conventional techniques described in Patent Documents 1 and 2 basically have a configuration in which only a long-term vertical load acts on the base portion that supports the load. In other words, since the structure is located directly above the foundation, the structure that mainly acts on the long-term vertical load and hardly the long-term horizontal load on the foundation, in other words, the long-term horizontal load. This is a configuration in which no special consideration is given.
If the long-term horizontal load acting on the foundation is reliably received and supported by the conventional techniques described in Patent Documents 1 and 2, it is necessary to increase the size of the foundation so that it can withstand the long-term horizontal load. is there.

  The present invention pays attention to such problems, and its purpose is to reliably receive and support a long-term horizontal load acting on the relatively small foundation portion without increasing the size of the foundation portion itself. An object of the present invention is to provide a support structure for a structure that can be used.

The structure support structure according to the present invention for achieving the above object is a structure support structure for applying a long-term vertical load and a long-term horizontal load to the foundation,
The characteristic configuration is that the earth retaining part for receiving the ground on the side of the foundation part is provided in a state where it is integrated with the foundation part, and the long-term horizontal load is applied to the back ground of the earth retaining part. is there.

According to the above characteristic configuration, the foundation part that receives and supports the load from the structure is integrated with the earth retaining part that receives the ground on the side of the foundation part, and the rear surface of the earth retaining part The structure is designed to bear a long-term horizontal load on the ground, so for the long-term horizontal load acting on the foundation, the earth pressure on the back ground of the earth retaining part acts mainly as the passive earth pressure and counters the long-term horizontal load. I will take it.
Therefore, it is possible to reliably receive and support a long-term horizontal load acting on the foundation by a relatively small foundation without increasing the size of the foundation itself. If so, the effect becomes very remarkable.

  A further characteristic configuration of the structure support structure according to the present invention is that the earth retaining portion is composed of an earth retaining wall used for the construction of the foundation portion.

  According to the above characteristic configuration, the retaining wall necessary for the construction of the foundation part can be effectively used as the retaining part as it is, and the construction cost can be reduced and the construction period can be reduced by sharing the retaining part with the retaining wall. Shortening can be achieved.

  A further characteristic configuration of the structure support structure according to the present invention is that the earth retaining portion is installed in a state of cutting a sloped surface of a mountain.

According to the above characteristic configuration, the earth retaining part is installed in a state of breaking the slope of the mountain, so the earth pressure of the back ground of the earth retaining part is when the earth retaining part is installed on a flat ground Therefore, the earth pressure on the back ground of the retaining portion can be used more effectively.
Therefore, the enlargement of the base portion can be further suppressed, and the long-term horizontal load acting on the base portion can be reliably received and supported.

  A further characteristic configuration of the structure support structure according to the present invention is that the structure is an arched roof structure provided with the foundation at both ends.

According to the above characteristic configuration, since the target structure is an arched roof structure, a relatively large long-term horizontal load acts on the foundations provided at both ends thereof. As described above, it is possible to reliably receive and support a long-term horizontal load by effectively using the earth pressure of the back ground of the retaining portion.
As a result, the long-term vertical load and long-term horizontal load from the arch-shaped roof structure can be reliably received and supported, and the arch-shaped roof structure can be supported over a long period of time.

Schematic sectional view showing the whole structure support structure Schematic sectional view showing the main part of the structure support structure

An embodiment of a structure support structure according to the present invention will be described with reference to the drawings.
For example, as shown in FIG. 1, a structure that is an object of the present invention is an arch-shaped roof structure 1, and is configured with a pipe material such as a steel pipe as a main material. A plurality of such arch-shaped roof structures 1 are installed in parallel to each other (in a direction parallel to the paper surface of FIG. 1), and awnings and rain protection awnings are stretched as necessary. And used as a playground.
At both ends of each arch-shaped roof structure 1, a base portion 2 for receiving and supporting the load from the roof structure 1 is provided, but since the structure is arched, As shown in FIG. 2, a long-term vertical load V and a long-term horizontal load H that act for a long time due to the weight of the roof structure 1, snow accumulation, and the like act on the foundation 2.

The foundation portion 2 that receives and supports the long-term vertical load V and the long-term horizontal load H is made of, for example, reinforced concrete made in the field and is formed in a rectangular shape in a plan view. An upper earth retaining wall 3 as a earth retaining part is provided on the upper side of the inclined surface Ma, and a lower earth retaining wall 4 is provided on the lower side, although not shown, Each has a lateral lateral retaining wall.
These upper earth retaining wall 3, lower earth retaining wall 4 and lateral side earth retaining wall are provided in a state of being integrated with the base portion 2 so that the load from the base portion 2 is directly transmitted. In such a case, a foundation pile (not shown) is disposed and buried below the foundation portion 2.

The upper earth retaining wall 3 as the earth retaining part is an earth retaining wall installed in a state where the inclined surface Ma of the mountain M is cut when the foundation part 2 is constructed, as will be described later, and the upper end of the earth retaining wall 3. The portion is located above the upper surface of the base portion 2, that is, at a height that substantially coincides with the upper surface of the inclined surface Ma of the mountain M.
And the upper earth retaining wall 3 receives especially the long-term horizontal load H among the long-term loads acting on the foundation part 2 from the arched roof structure 1, and the long-term horizontal load H of the upper earth retaining wall 3 is received. The back ground, that is, the back ground that is in contact with substantially the entire upper retaining wall 3 is loaded.

Next, a method for constructing this support structure will be described.
For example, as shown in FIGS. 1 and 2, if the foundation part 2 of the arched roof structure 1 is installed on the inclined surface Ma of the mountain M, the upper earth retaining wall 3 is installed at the place where the foundation part 2 is installed. The lower earth retaining wall 4 is constructed in the lower ground of the installation location, and the lateral lateral earth retaining wall is constructed in the lateral ground.
Each retaining wall 3, 4 is constructed by, for example, forming a large number of perforated portions by a single-shaft auger excavator, driving steel materials or steel pipes into the perforated portions as necessary, and further flowing in soil cement. It is possible to employ earth retaining walls with various configurations, such as driving and building steel sheet piles.

After the earth retaining walls 3 and 4 are constructed in this way, inside the earth retaining walls 3 and 4, the slope Ma of the mountain M is cut and the ground is excavated to a predetermined depth. A foundation pile is driven into the excavation site. Thereafter, reinforcing bars for the foundation part 2 are arranged at the excavation site, and the foundation part 2 is constructed by placing concrete using the retaining walls 3 and 4 as a formwork.
Thereby, the foundation part 2 is provided in an integrated state so that the load from the foundation part 2 is directly transmitted to each retaining wall 3, 4 in contact with each retaining wall 3, 4.
If necessary, reinforcing bars for connecting to the retaining walls 3, 4 and the foundation pile are arranged, and the reinforcing bars for connecting and the reinforcing bars for the foundation part 2 are connected and fixed to each other. Concrete can be cast using the walls 3 and 4 as a formwork, and the foundation 2, the earth retaining walls 3 and 4 and the foundation pile can be integrally connected.
And each edge part of each arch-shaped roof structure 1 is connected with respect to each foundation part 2 constructed in this way, for example by joint connection.

In the base portion 2 having such a configuration, the long-term vertical load V and the long-term horizontal load H acting from the arch-shaped roof structure 1 can be reliably received and supported.
In particular, regarding the long-term horizontal load H, since the back ground of the upper earth retaining wall 3 bears the long-term horizontal load H acting on the foundation part 2 via the foundation part 2, the foundation part 2 itself is relatively Even a small one can reliably receive and support the long-term horizontal load H.
In addition, for example, when the arch-shaped roof structure 1 is lifted upward by a wind pressure or an earthquake caused by a typhoon and a short-term horizontal load in the opposite direction to the long-term horizontal load H acts on the foundation 2, The back ground of the retaining wall 4 bears the load, and the back ground of the lateral lateral retaining wall bears the short-term horizontal load in the lateral direction.
In the figure, S denotes a staircase or a seat for viewing as required.

[Another embodiment]
(1) In the previous embodiment, the arch-shaped roof structure 1 was shown as an example of the structure. However, for example, a long-term vertical load V is applied to the foundation portion 2 like a structure having an oblique beam. If it is a structure on which a long-term horizontal load H acts, it can be applied as a support structure for various structures.

(2) In the previous embodiment, the example in which the base portion 2 is installed on the inclined surface Ma of the mountain M has been described. However, the installation location of the base portion 2 is not limited to the inclined surface Ma of the mountain M, and is flat. It is also possible to install on a rough ground.
Moreover, although the earth retaining wall 3 used for construction of the foundation part 2 was shown as an example of the earth retaining part provided integrally with the foundation part 2, it is not limited to the earth retaining wall used for construction of the foundation part 2 in particular. The earth retaining part provided for exclusive use in order to bear the long-term horizontal load H which acts on the part 2 by the back ground may be sufficient.
Further, in addition to the earth retaining wall 3, an example in which a lower earth retaining wall 4 and a lateral earth retaining wall are provided has been shown. However, the lower earth retaining wall 4 and the side earth retaining wall are not necessarily required. It is also possible to carry out without providing the lower earth retaining wall 4 and the lateral earth retaining wall.

DESCRIPTION OF SYMBOLS 1 Arched roof structure which is an example of structure 2 Foundation part 3 Earth retaining wall as earth retaining part M Mountain Ma Inclined surface V Long-term vertical load H Long-term horizontal load

Claims (4)

A support structure for a structure that applies a long-term vertical load and a long-term horizontal load to the foundation,
A structure support structure in which a soil retaining portion for receiving the ground on the side of the foundation portion is provided so as to be integrated with the foundation portion, and the long-term horizontal load is borne on the back ground of the soil retaining portion.   The structure support structure according to claim 1, wherein the earth retaining portion is composed of an earth retaining wall used for the construction of the foundation portion.   The structure support structure according to claim 1, wherein the earth retaining portion is installed in a state of cutting a sloped surface of a mountain.   The structure support structure according to any one of claims 1 to 3, wherein the structure is an arched roof structure including the foundation at both ends.

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