JPH06108482A - Tie back member, soil holding panel and soil holding structure - Google Patents

Abstract

PURPOSE: To obtain stoutness, and to easily construct soil-retaining structure by using a tieback and a soil-retaining panel having the same shape. CONSTITUTION: The soil-retaining panel 20 and the tieback member 10 take the same shape. The tieback member 10 is arranged in the direction rectangular to a bank, and the soil-retaining panel 20 is installed along the bank. The projecting surfaces 9 of the soil-retaining members 20 are engaged with the two recessed surfaces 7 of the tieback members 10, and both are fixed. Truss-shaped members 3 are mounted into internal cavities 2 in the tieback members 10 and the soil-retaining panels 20, and the members are reinforced. A net material can be used in place of the tieback member 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tieback member having a modular structure formed from precast concrete, a soil holding member, and a soil holding structure using these members. This soil retention structure can be used for landscaping, terrace formation, slope protection, noise barrier and erosion control.

[0002]

BACKGROUND OF THE INVENTION Conventional soil retaining walls have been formed from a plurality of standardized block units. These block units were assembled by stacking them up to a desired height without using mortar. Such a system is disclosed in US Pat. No. 3,282,054. In the prior art, the entire retaining wall would use the same foundation, since each block of the entire retaining wall rests on and depends on the block immediately below it. Other prior art retaining wall systems require a connecting member for the member or assembly,
This limits the versatility of the wall. U.S. Pat. No. 4,050,254 discloses a modular retaining wall system having a plurality of precast tieback members laterally spaced apart along a straight line. The tieback member includes an upright post that positions the holding panel down so as to bridge the lateral space between the pair of tieback members.

Prior art panels have concave and convex cross-sections in a horizontal plan view, ie circular or elliptical arch cross-sections, and are capable of withstanding loads from compressed soil fillings under pressure. You can do it. The arched panels of the present invention have the disadvantage that the ends of each panel may be completely enclosed by the tieback members and, if not covered, may crack in the panel. Fractures result from the application of tension from the holding earth. Further, since the tie-back member and the panel had to be cast separately, it took a lot of time to manufacture and was expensive. In addition, the cost of the two types of members had to be separately purchased and transported, which was extremely high. Another prior art curved retaining wall system is shown in US Pat. No. 4,341,491. The invention discloses curved front wall panels attached to front wall support members, which on the other hand are attached to the curved rear wall via tension members.
Such a system is quite complex, and again, the curved front panel can be cracked, requiring even more parts. A retaining wall having a straight wall member is shown in U.S. Pat. No. 4,707,962. The soil retaining structure according to the present invention discloses that a curved retaining wall panel and a straight member used as a tieback are used.

[0004]

The use of two different wall members here requires separate castigs and separate molds. The prior art wall panels and components are individually cast, which is time consuming and expensive to manufacture. Therefore, a first object of the present invention is to provide a soil holding structure using the same structural member for both the tieback member and the soil holding panel. A second object of the present invention is to provide a soil-retaining panel capable of preventing formation of cracks due to compressive force. A third object of the present invention is to provide a panel for a soil retaining structure which produces a flat surface but which is structurally strong and can be reliably combined with the tieback member posts. A fourth object of the invention is to provide a method of making a strong tieback member and soil retaining panel.

[0005]

A tie-back member according to claim 1, wherein a first wall, a second wall, and a first end portion connected to the first wall and the second wall are provided. A cored cavity formed by a second end connected to the first wall and the second wall, the first wall and the second wall and the first and second ends And a columnar end, and a neck portion bridging the first wall and the second wall at the first and second ends. Achieve the first objective. In the soil holding panel according to claim 2,
A first wall, a second wall, a first end that bridges the first wall and the second wall, and a bridge between the first wall and the second wall. The second end, the first wall and the second end
A wall and a cored cavity formed by the first and second ends, each of the first and second ends comprising:
The neck end bridging the column end and the first and second walls is provided to achieve the first object.

[0006] In the soil holding structure according to claim 3, claim 1
Both side concave portions of one neck portion of the tieback member described,
The second and third objects are achieved by engaging with the cylindrical end portion of the soil holding panel according to claim 2 and constructing it. According to the method of manufacturing the tieback member or the soil holding panel of claim 6, the tieback member or the soil holding panel is made of low slump concrete to achieve the fourth object.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a soil holding structure using a tieback member 10 and a soil holding panel 20 according to an embodiment of the present invention. The tie-back members 10 are provided with a soil holding panel 20 therebetween and are laterally arranged at regular intervals. The retaining backfill of the bank is indicated at 50.
Here, each tieback member 10 has substantially the same configuration as each soil retention panel 20, and thus like reference numerals are used. This tieback member 10
A single form of the soil holding panel 20 is shown in FIG. Each member comprises a first wall 4, a second wall 5 and a total of 12
It has two ends shown by. The walls 4 and 5 and the end 12 form a cored cavity 2. Truss member 3
Disposed in each cavity 2, a first and a second wall 4,
5 is bridged to increase the strength.

Each end 12 has two concave surfaces 7
With a narrowed neck portion 6 having The upstanding post member 8 has a convex surface 9 extending in the longitudinal direction of the first and second walls 4, 5 from the narrowed neck portion 6. The cored cavity 2 bridges between two ends 12 each forming a semi-cylinder. A reduced dimension neck 6 having opposing concave surfaces is between the cored cavity 2 and the respective post 8. The wall 5 forming the front surface of the soil retaining panel 20 preferably has a beautifully decorated surface in appearance. Each soil retention panel 20 has a cored cavity 2 formed by a truss-like member 3. The convex column member 8 of each member used as a soil holding panel is attached to the neck of each tieback member 10 by a portion 6a.
Is joined with the concave curve at. A reliable and strong combination between the tieback member 10 and the soil retaining panel 20 will be described with particular reference to FIG. Each tieback member 10
The concave surface 7 of the pillar member 8 of the adjacent soil holding panel 20.
Is joined to the convex surface 9 of. Tie back member 10
Are mounted with a backfill 50, and the upright post members 8 of the respective tieback members 10 hold the respective soil retaining panels 20 in place. The tieback member 10 is arranged so as to be orthogonal to the soil holding panel 20.

The tie-back member 10 and the soil holding panel 20 in this embodiment are manufactured by simultaneously casting using low slump type concrete. The tieback member 10 and the soil holding panel 20 are
The two members are cast in combination, facing one another like a siamese twin, along one of the flat walls forming the cored cavity 2. In order to place these stress-bearing and stress-transmitting components on individual grade levels, a soil fill 50 must be utilized to construct the bank. Then, they are continuously arranged on an appropriate base. The soil retaining panel 20, in combination between these modular structures, provides a strong interconnection and serves to connect the lateral spacing between adjacent pairs of tieback members 10.

The body of the tieback member 10 projects into the embankment a considerable distance from the pillar member 8 to provide a soil retaining panel 20.
The pressure applied to the ground is transmitted to the ground. The height of the pillar member 8 of the tieback member 10 can be changed according to the condition of the specific bank to be constructed. Further, the length of the tieback member 10 is determined according to the stable state of the bank. The tieback member 10 and the soil holding panel 20 according to this embodiment.
Can be mounted to form a soil retaining wall of the desired height. They can form well-appearing steps, which hold soil at various heights. These members can also be used to form a noise barrier. In this embodiment, the symmetrical configuration of the respective tieback member 10 and soil retention panel 20 can facilitate casting and use. That is, the builder can work without distinguishing the tieback member 10 or the soil holding panel 20. Each member can be cast prior to delivery and assembled on site.

Each member is a unitary precast concrete structure. To facilitate casting and add strength, it is desirable to use concrete or "loose plan" concrete with a small water to concrete ratio. That is, the concentration of water is lower than the amount of concrete used. Casting
Only enough water is needed to form the concrete in the mold. The precast concrete structure may be reinforced by prestressing, pretensioning or other means well known in the art.

Each tie-back member 10 and each soil-holding panel 20 may be cast separately, but a plurality may be cast simultaneously. Casting multiple things at the same time
It is advantageous and desirable in construction. Co-casting is done by providing a mold or mold. The mold has channels in the form of members for accommodating concrete, and the adjacent walls of each member are
It is configured to be molded as one wall at the same time. Due to the symmetry, the tieback members 10 can cast multiple tieback members 10 together with multiple soil retention panels 20. Since the tieback member 10 and the soil retaining panel 20 are relatively flat, many such members can be cast simultaneously, the number being limited by the maximum size of the mold or mold. While reinforced precast concrete structures are practical and economical for most applications of the present invention, modular members may be constructed of any suitable material such as steel, fiberglass, reinforced plastics and the like.

4 to 7 show a second embodiment. As shown in FIG. 4, the post member 30 has a concave surface 31 and a convex surface 32 and serves as an alternative to the tieback member 10 in the first embodiment. The concave surface 31 of the pillar member 30 is combined with the convex surface of the adjacent soil retaining panel 20 for a secure and firm bond. Each column member 30 has a keyhole-shaped slot 33 as shown in FIG. 7. A mesh or mesh 34 of wire or other suitable material is retained within the keyhole-shaped slot 33. The engagement between the column member 30 and the mesh 34 is shown in FIG. Here, the backfill 50 is placed around the net 34 to aid in locking the post 30 in place. Rods or stiffening rods can also assist in mounting the post member 30. On the other hand, the concave surface 3 which is a combined surface
1 and the convex surface 9 of the soil holding panel 20, the pillar members 30 each hold the soil holding panel in place. FIG. 5 shows a state where the soil holding panels 20 in this embodiment are stacked.
Shown in. In this way, the panel 20 can be stacked to a desired height.

[0014]

In accordance with the present invention, there is provided a soil retention structure utilizing modular structural units, the units comprising:
It can be mass-produced away from the building site, stored in the desired location, method, and then easily constructed with conventional techniques and simple controls. In addition, the novel tieback members, in particular, provide soil pressure to such soil retention panels for placement and support of the soil retention panels and against pulling walls or other undesired movements. It is provided to transfer to the mass. As a result, a holding wall having high strength, stability and durability can be obtained. Using the soil retention structure according to the present invention,
The plurality of retaining wall stages can be constructed in a continuous, sequential manner or independently of each other up to a desired height at desired time intervals.

[Brief description of drawings]

FIG. 1 is a plan view showing an arrangement of a tieback member and a soil holding panel according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a combination between a tieback member and a soil retaining panel.

FIG. 3 is a plan view showing a state of a tieback member and a soil holding panel as a single body.

FIG. 4 is a perspective view showing an arrangement of a second embodiment of the present invention.

FIG. 5 is a side view showing a stack of soil holding panels in the second embodiment.

FIG. 6 is an enlarged view showing a combination between a pillar member and a soil holding panel in the second embodiment.

FIG. 7 is a perspective view showing a keyhole-shaped slot of a pillar member in the second embodiment.

[Explanation of symbols]

 2 ... Cavity 3 ... Truss-like member 4 ... First wall 5 ... Second wall 6 ... Neck part 7 ... Two concave surfaces 8 ... Pillar member 9 ... Convex surface 10 ... Tieback member 12 ... End part 20 ... Soil Holding panel 30 ... Pillar member 33 ... Keyhole-shaped slot 34 ... Net 50 ... Rear filling material

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[Procedure amendment]

[Submission date] September 10, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Figure 3]

[Figure 5]

[Figure 7]

[Fig. 2]

[Figure 4]

[Figure 6]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor H. Joe Mahine, 80295 Denver, Colorado, USA 1860 Lincoln Street, Suites 1026

Claims (6)

[Claims] 1. A first wall, a second wall, a first end connected to the first wall and the second wall, and a first end connected to the first wall and the second wall. A second end, a first wall and a second wall, and a cored cavity formed by the first and second ends, the first and second ends And a neck portion bridging the first end and the second wall with a cylindrical end and a neck end bridging the first wall and the second wall. 2. A first wall, a second wall, a first end portion bridging the first wall and the second wall, the first wall and the second wall. A second end bridging the wall; a cored cavity formed by the first and second walls and the first and second ends; A soil retention panel characterized in that the first and second ends comprise a neck end bridging the post end and the first and second walls. 3. The tie-back member according to claim 1, wherein both side concave portions of the neck portion of the tie-back member are engaged with the cylindrical end portion of the soil holding panel according to claim 2, thereby constructing. Soil holding structure. 4. A pair of support members, one of which is a semi-cylindrical end portion, the other of which is a flat end portion, and both side surfaces of which are recessed inward, and the flat end portion of which is an inward key. A soil holding member comprising hole-shaped slots, and a mesh belt having both ends locked in the keyhole-shaped slots. 5. A soil holding structure constructed by engaging a hollow portion on a side surface of the soil holding member according to claim 4 with a cylindrical end portion of the soil holding panel according to claim 2. . 6. The tieback member according to claim 1 or the soil holding panel according to claim 2, which is made of low slump concrete.