JP3035969U - Ground support structure - Google Patents

Abstract

(57) [Summary] [Objective] The present invention aims to provide an improved structure for strengthening the ground supporting force rather than strengthening the ground with a small number of ground reinforcing materials to improve the ground supporting force. [Structure] In the structure of the present invention, since the ground reinforcement is inclined from the periphery of the structure to the ground below the structure and penetrates the main rust area, the main rust area extends downward and is expanded to a small number. The ground support material of the ground reinforces the ground support force significantly, and since the ground reinforcement material is inclined from the periphery of the structure to the ground below the structure, it contributes to the expansion of the main rust area and the reinforcement material Reinforcement to be applied is extremely efficient compared to the case where it is expanded to the outside and the main work is performed when the ground reinforcement is applied to multiple layers by penetrating the main work rust area. The expansion of the rust area is extremely effective.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a structure for strengthening the ground supporting force for improving the supporting force of the ground under the structure.

[0002]

[Prior art]

 For example, if the bearing capacity of the ground under the existing structure decreases for some reason, the load that the existing structure bears increases, or the standard for safety changes, the bearing capacity of the ground should be reduced. Need to improve. On the other hand, a structure in which a pile is constructed in the ground below a structure is conventionally known, but in this structure, since the structure and the pile must be integrated, it cannot be applied when the structure is an existing one. There are many. There is also a structure in which a large number of piles (15) are constructed around the structure (1) as shown in Figs. 9 and 10, but this structure requires a large number of piles (15), and if the number of piles is 15 In a few cases, as shown in FIG. 11, the main working rust area (11), the transient area (12) and the passive area (13) in the ground (10) that bears the bearing force of the ground (10) are greatly reduced. There was a danger that expansion could not be expected and it would not lead to improvement of ground support capacity. Here, the main rust area, transient area, and passive area will be explained below based on the description in P102 of "New soil and foundation design calculation exercise" issued by the Society of Geotechnical Engineering. "That is, the current bearing capacity theory is an extension of the research results of metal plasticity theory. In other words, it is a fracture mechanism that gives the surface bearing pressure of a band-shaped rigid body when the metal is assumed to be an isotropic / homogeneous rigid-plastic body. The main working rust of an isosceles triangle with a base angle of 45 degrees is formed in the lower part of the rigid body, and an arc (transient region) with a central angle of 90 degrees is pushed out to the left and right, which is also an isosceles right angle with a base angle of 45 degrees. It is said that the triangular receiving rust is pushed upwards.In the failure mechanism observed by the bearing capacity experiment of the band foundation on the sand ground, the formation of the main rust, the transient region and the receiving rust was confirmed, and the sand It has been found that a fracture mechanism similar to that of metal occurs basically in the granular material such as, and the rationality of the bearing capacity theory of the direct foundation applying the metal plasticity theory is recognized. ” Japanese Patent Laid-Open No. 55-136337 discloses a foundation reinforced by a number of reinforcing materials or piles which do not face the same direction. However, in this structure, the reinforcing material is not installed inwardly into the ground below the structure, but rather is installed so that it extends outside the structure, and the efficiency with respect to the number of reinforcing materials is increased. There was room for improvement.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to solve the above-mentioned conventional problems and to provide an improved structure for strengthening the ground supporting force rather than strengthening the ground with a small number of ground reinforcing materials to improve the ground supporting force.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a ground reinforcement material which is constructed by inclining inward from the periphery of a structure to the ground below the structure and having a permeation hardening portion around the reinforcement material. The proposed structure is a structure that strengthens the ground support force by penetrating the main working rust area without reinforcement.

[0005]

[Embodiment of the invention]

 Hereinafter, the structure for strengthening the ground supporting force of the present invention (hereinafter referred to as the structure of the present invention) will be described according to an embodiment shown in the drawings. 1 to 3 show a structure of the present invention, which is a structure such as a building, a tank, a pier (1) into the ground (10) under the structure (1) from the periphery of the structure (1) to the inside. It has a ground reinforcement material (3) that is constructed with an inclination. Here, the term "peripheral" includes not only the entire circumference but also the two-dimensional circumference, and is used as a concept of constructing so as not to hinder the structure itself. That is, the ground reinforcement material (3) penetrates the main working rudder area (11) formed in the unreinforced ground (10) so that the ground (below) the structure (1) from around the structure (1). It is constructed by inclining inward into 10). As the auxiliary plate reinforcing material (3), it is desirable to use, for example, cast-in-place reinforcing bar mortar or reinforcing bar reinforcing cement milk pile having a small diameter. That is, what is required for the ground reinforcement material (3) is that it is integrated with the ground (10), so that the ground (10) can be made to follow the distortion of the ground (10) and cast in place. ) And the adhesion with. 12 and 13 show the details of the ground reinforcement material (3). The ground reinforcement material (3) is used for the reinforcement reinforcement C and the permeation hardening part C by a method such as applying pressure to the surroundings of the reinforcement material at the time of injection or using expansion cement. It has been constructed. By having the permeation-hardened portion C around the reinforcing material, the ground (10) itself is strengthened and structurally integrated with the ground (10). As a result of the construction of the ground reinforcement material (3) in this way, the main working rust area (11) is expanded downward and expanded, and along with this, the transient area (12) and the passive area (13) are deeper and deeper. Get wider Here, the ground reinforcement material (3) shares the tensile force, and as a result of following the strain of the ground (10) integrally, the ground support force is improved and the structure (1) is sufficiently supported. 4 to 8 show another structure of the present invention, which has the following features in comparison with those of FIGS. 1 to 3. That is, the ground reinforcing material (3) is composed of the first layer ground reinforcing material (3a) and the second layer ground reinforcing material (3b). The first-layer ground reinforcement material (3a) is installed so as to be inclined so as to penetrate the main working rudder region (11) formed in the unreinforced ground (10). Next, the second layer ground reinforcement material (3b) is installed so as to be inclined so as to penetrate a new main rust region (11) extending downward as a result of the reinforcement by the first layer ground reinforcement material (3a). The rust region (11) that mainly acts as a result extends further downward and is enlarged. The second layer is a ground reinforcement material that does not penetrate the main working rust area (11) before the first layer is applied and penetrates the main working rust area (11) after the first layer is applied. It is the layer (3b). Here, the ground reinforcement material (3) including the first layer and the second layer is inclined from the periphery of the structure (1) into the ground (10) below the structure (1).

[0006]

[Effect of the invention]

 The embodiment of the structure for strengthening the ground supporting force of the present invention is as described above, and its effects are listed below. (1) The structure of the present invention has the structure described in the scope of claims for utility model registration. Particularly, the ground reinforcement is inclined from the periphery of the structure to the ground below the structure and penetrates the main working rust area. The working rust area extends downward and is expanded, and the ground supporting force is greatly improved with a small number of ground reinforcements. (2) The structure of the present invention has the same structure as above. Particularly, since the ground reinforcement is inclined from the periphery of the structure to the ground below the structure, it contributes to the expansion of the main rust region and the reinforcement is used as the structure. The efficiency per length of the reinforcing material to be applied is extremely good as compared with the case of applying it to the outside of the. (3) The structure of the present invention has the same structure as above, and particularly when the ground reinforcing material is applied to multiple layers by penetrating the main working rust region, the expansion of the main working rust region is extremely effective. As shown in FIGS. 8 to 11, the number of piles (15) is approximately equal to the number of ground reinforcements (3), which is 1.5 to 2.0 times larger than that of FIGS. 9 to 11. Have power).

[Brief description of the drawings]

FIG. 1 is a plan view of a ground reinforcement material constructed by the structure of the present invention.

FIG. 2 is a view taken along arrow II-II in FIG.

FIG. 3 is a state diagram of the ground according to FIG.

FIG. 4 is a plan view of a ground reinforcement material constructed by another structure of the present invention.

FIG. 5 is a view taken along the line VV in FIG.

6 is a VI-VI arrow view of FIG.

FIG. 7 is a plan view of the first-layer ground reinforcement material of FIG.

FIG. 8 is a plan view of the second-layer ground reinforcement material of FIG.

FIG. 9 is a plan view of a pile constructed by a conventional structure.

FIG. 10 is a view on arrow XX in FIG.

11 is a state diagram of the ground according to FIG.

FIG. 12 is a vertical sectional view of a ground reinforcement material used in the structure of the present invention.

13 is a transverse sectional view of FIG.

FIG.

[Explanation of symbols]

 1: Structure 3: Ground Reinforcement Material 3a: First Layer Ground Reinforcement Material 3b: Second Layer Ground Reinforcement Material 10: Ground 11: Main Working Rust Area 12: Transient Area 13: Passive Area 15: Pile

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[Procedure amendment]

[Submission date] October 23, 1996

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a plan view of a ground reinforcement material constructed by the structure of the present invention.

FIG. 2 is a view taken along arrow II-II in FIG.

FIG. 3 is a state diagram of the ground according to FIG.

FIG. 4 is a plan view of a ground reinforcement material constructed by another structure of the present invention.

FIG. 5 is a view taken along the line VV in FIG.

6 is a VI-VI arrow view of FIG.

FIG. 7 is a plan view of the first-layer ground reinforcement material of FIG.

FIG. 8 is a plan view of the second-layer ground reinforcement material of FIG.

FIG. 9 is a plan view of a pile constructed by a conventional structure.

FIG. 10 is a view on arrow XX in FIG.

11 is a state diagram of the ground according to FIG.

FIG. 12 is a vertical sectional view of a ground reinforcement material used in the structure of the present invention.

13 is a transverse sectional view of FIG.

[Explanation of Codes] 1: Structure 3: Ground Reinforcement Material 3a: First Layer Ground Reinforcement Material 3b: Second Layer Ground Reinforcement Material 10: Ground 11: Main Working Rust Area 12: Transient Area 13: Passive Area 15: Pile

Claims (1)

[Utility model registration claims] 1. A ground reinforcement material which is inclined inward from the periphery of a structure into the ground below the structure and has a permeation-hardened portion around the reinforcement material when the ground reinforcement material is not reinforced inside the ground. Reinforced structure of ground support force that penetrates the working rust area