JP3000511B2 - Retaining wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall made of a precast concrete box member.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional inverted T-shaped retaining wall a. When the height H from the bottom b to the top of the retaining wall exceeds 5 m, a cast-in-place reinforced concrete structure is obtained.

[0003]

Since the conventional inverted T-shaped retaining wall has a cast-in-place reinforced concrete structure, scaffolding, reinforcing bar arrangement, formwork assembly, concrete casting,
Work such as curing, demolding, and dismantling of the scaffold is required, and there is a problem that the construction period is prolonged. The present invention has been made in view of the above problems, and has as its object to simplify construction, shorten the construction period, and provide a structurally reasonable retaining wall.

[0004]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a retaining wall body constructed by assembling a precast concrete box member on a foundation, wherein the adjacent precast concrete box member is provided. Along with embedding the reinforcing steel material erected on the foundation in the cast-in concrete part cast at the seam, and attaching a vertical beam to the foundation as the reinforcing steel material, on a retaining wall formed by backfilling the back of the box, A stay is attached between the back of the vertical beam and the foundation.

[0005]

The retaining wall of the present invention is constructed by assembling the precast concrete box members on the foundation to form the retaining wall main body as described above. Workability is improved and the construction period is shortened. However, if the precast concrete box members are simply laid, the stability of the retaining wall body is lacking. Therefore, a reinforcing steel material is buried in a concrete portion to be cast at a joint between adjacent precast concrete box members. A vertical beam is attached to the foundation as this reinforcing steel material, and a stay beam is attached between the back of the vertical beam and the foundation to secure a safety factor for stable calculation of the retaining wall.

The concrete filled in the seam of the precast concrete box member serves as a protection material for the vertical beam. Also, backfilling is performed every time the concrete box members are stacked in the required steps, so that the risk of work at height is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. A of FIG. 2 to FIG. 4 is a precast concrete box member, and a reinforcing and bonding anchoring force between the concrete and a concave wall surface formed between a pair of opposite projections 2 provided on the side surface of the box-shaped main body 1. Vertical ribs 3 and horizontal ribs 3 'for increasing the size are provided, and a concave portion 4 for draining groundwater on the back surface is provided on the upper surface. In the figure, reference numeral 5 denotes a watertight seal groove provided on the projection 2, and reference numeral 6 denotes a guide pin insertion hole used when assembling the precast concrete box A.

As shown in FIG. 1, a leveling concrete 7 is cast and spread, and a bottom slab I-shaped steel 8 is provided and fixed to the leveling concrete 7 via an anchor 9. A vertical beam 10 made of a shaped steel is attached, and an I-shaped steel beam 11 is installed between the back surface of the vertical beam 10 and the bottom slab I-shaped steel 8. Note that only the stay 11 is made of a hot-dip galvanized member. Further, the distribution bars are arranged on the bottom I-beam 8 and the bottom concrete is cast on the leveling concrete 7 to form the foundation B.

Next, on the foundation B, the bottom plate I-beam 8
The backcasting is performed by backfilling the precast concrete box member A with the backfill soil 14 every time the precast concrete box member A is laid in the first to third steps so that the precast concrete box member A is positioned at the member seam (FIG. 2). ), Adjacent precast concrete box member A
Pile concrete C so as to bury the vertical beam 10 and the stay beam 11 on the foundation of the joint, and thus the retaining wall main body A 'is constructed by the precast concrete box member A, and this retaining wall main body A' Is disposed on the back of the precast concrete box member A, and the groundwater on the back is drained from the recess 4 provided in the precast concrete box member A to complete the construction of the retaining wall.

[0010] The precast concrete box member A is filled with crushed stone and soil, and a hanging plant and other plants are planted in the uppermost precast concrete box member A, so that the retaining wall is greened.

[0011]

As described above, since the retaining wall of the present invention is constructed by assembling the precast concrete box members on the foundation and constructing the retaining wall main body, the work of assembling the formwork, removing the mold, and processing the reinforcing steel is almost the same. In addition, the work of the formwork can be greatly reduced, and the construction period can be significantly shortened compared to the conventional cast-in-place concrete retaining wall. In addition, since the retaining wall body lacks stability only by masonrying the precast concrete box member, a reinforcing steel material is buried in a hollow concrete portion to be cast at a joint between adjacent precast concrete box members. A vertical beam is attached to the foundation as this reinforcing steel material, and a stay beam is attached between the back of the vertical beam and the foundation, so that the stability of the retaining wall can be secured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a retaining wall of the present invention.

FIG. 2 is a longitudinal sectional view showing a state in which the configuration of the retaining wall main body and back filling are performed.

FIG. 3 is a longitudinal sectional side view showing a state where the configuration of the retaining wall is completed.

FIG. 4 is a perspective view showing a precast concrete member.

FIG. 5 is a longitudinal sectional view of a conventional inverted T-shaped retaining wall.

[Explanation of symbols]

 Reference Signs List A Precast concrete box member A 'Retaining wall main body B Foundation 1 Box-shaped main body 2 Projection 3 Vertical rib 3' Horizontal rib 4 Recess 5 Waterproof seal groove 6 Guide pin insertion hole 7 Leveling concrete 8 Bottom plate I-shaped steel 9 Anchor 10 Vertical beam 11 Standing beam 14 Backfill soil

Continuation of the front page (56) References JP-A-6-57767 (JP, A) JP-A-61-10337 (JP, U) JP-A-46-35166 (JP, Y1) JP-A-46-29713 (JP) , Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 29/02 303 E02D 29/02 309

Claims (1)

(57) [Claims] 1. A precast concrete box member is laid on a foundation to form a retaining wall body, and a standing concrete portion installed at a seam of the adjacent precast concrete box member is erected on the foundation. A vertical beam was attached to the foundation as the reinforcing steel material, and a stay beam was attached between the rear surface of the vertical beam and the foundation in the retaining wall formed by burying the reinforcing steel material and the back of the box. A retaining wall characterized by the fact that: