JP3046021U - Precast retaining wall with stable construction - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention integrates a conventional retaining retaining wall product, which does not have structural problems, which becomes OUT in stability calculation due to sliding or overturning with the base concrete low plate, to achieve stability calculation. However, there is a problem of providing a product that can pass even conventional mold products. SOLUTION: A joint steel material is provided on a base concrete low plate, and a combination retaining chamfered opening is provided for a retaining retaining wall product to be overlaid thereon, a fine setting is easily performed, and a concrete is cast on site. A precast retaining wall of stable construction that has a means to install and integrate the low concrete foundation and adjacent products.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a precast retaining wall product of an earth retaining structure which becomes OUT due to stable sliding or overturning even if there is no structural problem.

[0002]

[Prior art]

 In the case of L-shaped retaining walls, single retaining grooves, retaining grooves, retaining variable grooves, retaining BOX products, etc., which have been conventionally referred to as retaining retaining wall products, changes in on-site load conditions (as an overload Ew. If the load of the ring, embankment, snow cover, and cornice load is 500kg / m2 to 1000kg / m2 or more), or the earth pressure is calculated from the Coulomb formula, the wedge calculation formula is used. If a product compatible with the safety factor with a friction coefficient of μ = 0.6 to 2 / 3φ is required, even if the conventional product passed the test by increasing the reinforcing bars on the side walls, etc., there was no problem. The width of the bottom plate (virtual back plate) becomes insufficient due to sliding or falling in the stability calculation, so that it often happens that the bottom plate (virtual back plate) becomes OUT and cannot be handled. In such a case,

[0003] In order to obtain a product with a acceptable bottom slab width (length), the mold is largely modified or manufactured with a new separate mold. We will respond by integrating steel bars and adding concrete at the site. The soil of the back embankment will be replaced by soft soil with gravel soil with a large angle of repose to secure the stability of the retaining wall. In the case of wheel loads, there was a method of securing land and increasing the approaching horizontal top distance of the wheel loads.

[0004] However, these products and construction methods have the following disadvantages and problems. The method of remodeling the formwork is that the concrete is cast from the back that is constructed and the virtual back low plate is formed, so this part becomes the blade part and it is a special remodeling of the formwork, Requires a lot of money. In addition, new purchase of a formwork is not only a burden for the company that owns the conventional formwork, but also a product with a large low plate width has a risk of cracking in the front wall and the contact point of the low plate. It was extremely difficult to stock, transport, and handle the yard.

[0005] In the conventional method, a method of cooperating with rebars by adding concrete and adding concrete at the site is conventionally required to expose the rebar for joints from the end of the formwork, which is a laborious work. It was not a very good method to assemble insufficient steel bars and form a concrete frame using concrete, and did not shorten the construction period.

[0006] In the method of replacing the backfill embankment with soft soil and gravel soil, it is often difficult to secure a disposal site because the soil to be replaced is soft soil, and this is also a limited field to adopt. I could only do it.

[0007] The method of securing the land and increasing the distance of the approaching horizontal end of the wheel load increases the land cost unless the land can be secured at a low cost in a rural area or a mountainous area. Was limited.

[0008] Therefore, engineers of the Technical Association of the present invention have requested that the overload Ew. However, even if the calculation method described above is different or the friction coefficient is small at 1000 kg / m2 in general, ● The product itself is structurally acceptable (OUT and rejected due to stable calculation of sliding and falling) )point. ● The technical and economical examination of the construction of earth retaining retaining wall products with these low editions was carried out while paying attention to the fact that the foundation concrete, which also controls unevenness, was always installed. The problem to be solved by the invention is as follows.

[0009]

[Problem to be solved by the invention] The product itself should be technically compatible with the mold of the conventional product. Changes in the thickness and width (length) of the foundation concrete will be taken into account, and this will be combined with the product body, and at the same time, the adjacent parts of the product will be combined, so that it will be resistant to partial sliding and partial tipping. The solution can be used not only for L-shaped retaining wall sill but also for single sill side gutters, sill side gutters, sill variable gutters, slab BOX products, etc., of products whose one side wall constitutes the sill. In addition, it will be a product that can be quickly and safely installed, and at the same time be economical.

[0010] Based on the above problems, the solution of the present invention is as follows.

[0011]

[Means for Solving the Problems]

 A joint steel material is provided on the base concrete low plate, and the retaining retaining wall product to be overlaid here is provided with a combination chamfered opening to facilitate fine setting, and then cast-in-place joint concrete here. Therefore, a stable construction precast retaining wall product that has a means of integrating the foundation concrete low plate and the adjacent product.

This will be described sequentially with reference to the drawings of the embodiments.

[0013]

【Example】

 Basic chestnut stone5. Base concrete bottom slab according to the bearing capacity of the soil retaining wall construction site where the compaction was performed. (Not shown, not only casting on site but also a product of split factory) Concrete thickness t. And width L. Is determined and the base concrete low plate B. Steel joints at key points (positions of openings of soil retaining wall products constructed adjacent to above) To expose. This base concrete low plate B. Soil retaining wall products vertically installed adjacent to A. Virtual back low version A-1. Has a narrower end than the front and has a flat wedge-shaped shape (consideration of inner curve construction and ease of setting). 1. A chamfer of 45 ° or more in circumference at the end as far as the width (length) of 2. Reinforcing bars for construction and hanging joints and adjacent product joints. 3. Combination opening part provided with (One perforated part assembled) on both sides.

[0014] This product is used as a joint reinforcing bar of an adjacent product which also serves as a construction hanger. Chamfering part while lifting using 5. Leverage or burr Using the front and back and left and right, fine setting (the left and right sides of the front of the wall surface can be slid left and right by inserting levers or burrs 6.) More exposed joint steel 1. 3. Combination opening to be constructed 2. Reinforcing bar for joint And the concrete casting site D. And cast a low concrete base B. And virtual back low edition A-1. These are stable precast retaining wall products that are integrated from the rear end.

The present invention configured as described above has the following operations and effects.

[0016]

[Functions and effects of the invention] Attached attachment formwork with a chamfered section on the concrete casting surface of the formwork of the conventional product is attached, and a joint reinforcing bar that also serves as a hook is hooked and exposed. Just by doing, you can manufacture the main body product.

[0017] Rather than modifying the formwork or changing the width (length) of the virtual back low version of the main product with a newly purchased formwork, use the thickness and width (length) of the conventional foundation concrete low version. Correspondingly, since only the joint steel is exposed, the cost of the entire construction can be reduced.

[0018] Not only is the product body bonded to the base concrete low plate, but also the product is bonded to the adjacent part of the product from the back of the low plate, so that it is resistant to partial sliding and partial tipping due to uneven earth pressure. Becomes a wall. In addition, as shown in FIG. 2, by making the base concrete low plate thickness thicker at the heel than at the toe, the stability of the product sliding is further ensured.

By inserting levers and burrs into the gaps formed in the chamfered portion of the opening or the wedge-shaped rear end, fine setting is easy, and in addition, the use of the hanging rebar that also serves as a joint can be achieved. Safe and quick construction is possible. This technology can be used not only for L-shaped retaining wall soil retaining but also for products of which one side wall constitutes the soil retaining soil groove, the earth retaining groove, the earth retaining variable gutter, the earth retaining BOX product and the like.

[Brief description of the drawings]

FIG. 1 is a perspective cross-sectional view and an essential part detailed view showing an outline of the present invention in an L-shaped retaining wall product.

FIG. 2 is a schematic cross-sectional view showing an embodiment of the present invention in which the thickness of the toe portion and the heel portion of the base concrete low plate is changed to obtain a slanted base concrete low plate.

FIG. 3 is a schematic cross-sectional view when the technology of the present invention is applied to a single retaining gutter product.

FIG. 4 is a schematic cross-sectional view when the technology of the present invention is applied to a soil retaining variable gutter product.

[Explanation of symbols]

 A Soil retaining wall product A-1 Virtual back low plate B Base concrete low plate C Road surface pavement concrete D Cast-in-place joint concrete t Low plate concrete thickness L Low plate width Еω Overlay load 1 Joint steel 2 Chamfer 3 Joint Reinforcing bar 4 Combination opening 5 Foundation chestnut stone 6 Lever or burr 7 Invert concrete 8 Passive embankment 9 Protective fence 10 Construction hanger wire

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahiko Hatakeyama 92-4 Kanuma, Tenno-cho, Tenno-cho, Minami-Akita-gun, Akita Prefecture Inside Akita Hume Kanko Co., Ltd. (72) Inventor Hitoshi Takano 190-3, Yashihashi, Akita-shi Inside of Nippon Concrete Co., Ltd. (72) Hideo Takahashi 26, Nagamachi, Sugimiya, Ugo-machi, Ogatsu-gun, Akita Prefecture Inside of Sanwa Concrete Industry Co., Ltd. (72) Kazuhisa Taishima 1 Nishi-Osaka, Kansai, Kisagata-cho, Yuri-gun, Akita Prefecture −56 Within Nihonkai Kogyo Co., Ltd. (72) Inventor Akira Tomo 83-2 Shimootodo, Noshiro-shi, Akita Oricon Co., Ltd. (72) Takashi Ito Kitano, Tennocho, Minami-Akita-gun, Akita 64 Taihei Concrete Co., Ltd. (72) Inventor Isao Ogata Akita Pref.

Claims (1)

[Utility model registration claims] 1. A base concrete bottom slab according to the ground strength of a retaining wall construction site. Concrete thickness t. And width L. Is changed, and the lower concrete B. From the important points from the back of the joint steel material 1. Are exposed, and the retaining wall products A. Virtual back low version A-1. Has a chamfer of 45 ° or more in circumference. And joint reinforcement for adjacent products that also served as a construction hanger3. 3. Combination opening part provided with
Are constructed on both sides, and after the product is laid, the cast-in-place joint concrete D. And cast a low concrete base B. Precast retaining wall with a stable construction that is integrated with the