JPH0656012B2 - Assembly type buried block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a spinning top type buried block used in a method for strengthening and stabilizing foundation ground such as structures, roads, and waterway facilities.

[Prior Art] As disclosed in Japanese Examined Patent Publication No. 56-50054, a spinning type embedded block comprising an inverted truncated cone-shaped body having a circular head and a cylindrical shaft leg protruding from the lower end of the body. Is a weak ground that balances the weight of the block itself and the vertical load of the overlaid structure with the ground reaction force and frictional force received by the body and the shaft leg, thereby achieving horizontal ground strength without uneven settlement. It is used as a basic component in the ground reinforcement and stabilization method.

[Problems to be Solved by the Invention] Since a relatively small shaft leg is projected at the center of the lower end of a large circular body in this top type buried block, another H-shaped holder is used in the curing step after molding and during storage and transportation. It is impossible to stack them vertically and horizontally like wall blocks, and to place them one by one with the tip of the shaft leg and the head side ridge of the body grounded. .

Therefore, a large storage and transportation space is required, and
A large stress is applied to the base portion of the shaft leg due to the above-mentioned two-point contact, so if it is not handled carefully, the base portion may be cracked or the shaft leg may be broken due to the impact during transportation and loading. Is.

Therefore, an object of the present invention is that it is divided into an inverted truncated cone shape or an inverted truncated pyramidal trapezoidal body and a cylindrical shape or a prismatic shaft leg, so that it can be piled up in an orderly manner, so that the transportation and storage space can be saved and the transportation and loading can be performed. It is an object of the present invention to provide an assembly-type embedded block that does not damage the shaft leg when it is lowered.

Another object of the present invention is to provide an assembly type embedded block in which the body and the shaft leg are accurately held in a predetermined assembled state, and the shaft leg is not pulled out from the body.

Still another object of the present invention is to provide an assembling type embedding block that is buried as a seawall member in a sandy surface layer portion of a gently sloped surface of a shoreline, and this burying work proceeds smoothly and appropriately by utilizing a pressurized water flow. That is.

[Means for Solving the Problems] Hereinafter, description will be given using the reference symbols in the accompanying drawings. In the assembly type embedded block of the present invention, an inverted truncated cone shape or an inverted pyramid trapezoidal body 2 and a cylindrical shape or prismatic shaft leg 3 are provided. It was divided into and.

The body 2 is provided with a recess 11 at the center of the upper surface of a circular or prismatic head 4, a bottom through hole 5 smaller than the recess 11 is provided at the bottom of the recess 11, and an escape groove is provided at the inner side surface of the top and bottom through hole 5. 12 are connected in series. The shaft leg 3 is provided with a shoulder portion 7 in contact with the lower end surface 6 of the body 2 at an intermediate portion thereof, and a connecting rod portion 8 inserted into the vertical through hole 5 of the body 2 is provided above the shoulder portion 7 so as to project. The engaging projection 13 is provided at the upper end of the connecting rod portion 8 and is inserted into the escape groove portion 12.
3 is engaged with the bottom surface of the recess 11 to connect the body 2 and the shaft leg 3.

In addition, in another assembly type embedded block of the present invention, in addition to the above configuration, a vertical groove 19 is provided on the tip side surface of the locking projection 13,
The vertical groove 18 facing the vertical groove 19 is provided at a position on the inner peripheral surface of the recess 11 that does not contact the escape groove portion 12, and the vertical groove 1
The connecting member 9 was inserted across 8 and the vertical groove 19 to prevent the pivot leg 3 from rotating.

In still another assembly type embedded block of the present invention, in addition to the above-mentioned respective configurations, the upper surface of the circular or rectangular head 4 is made to be a single-flow inclined surface 14, and the injection through hole 15 for pressurized water flow is vertically penetrated through the shaft leg 3. And provided.

[Operation] The assembling of the body 2 and the shaft leg 3 is generally performed at a construction site. In this assembly, the connecting rod portion 8 of the shaft leg 3 is inserted into the through hole 5 of the body from below. When the shoulder portion 7 comes into contact with the lower end surface 6 of the body, the locking projection 13 is moved from the escape groove portion 12 to the recess portion 1.
Since it projects into the inside 1, the shaft leg 3 is rotated to separate the locking projection 13 from the escape groove 12, and then the locking projection 13 is engaged with the bottom surface of the recess 11. As a result, the assembly of the body 2 and the shaft leg 3 is completed.

Further, since the vertical groove 19 is provided on the tip side surface of the locking projection 13 and the vertical groove 18 is provided on the inner peripheral surface of the recess 11, the shaft leg 3 is rotated to the position where the vertical groove 19 faces the vertical groove 18. After that, the pipe or rod-shaped connecting member 9 is inserted across the vertical groove 18 and the vertical groove 19 to prevent the rotation of the shaft leg 3 and maintain the engagement state between the locking projection 13 and the bottom surface of the recess 11. it can.

The upper surface of the circular or prismatic head 4 is a single-flow inclined surface 14,
Since the through hole 15 for injecting the pressurized water flow is provided vertically through the shaft leg 3, when the buried water layer is covered and buried in the sandy surface layer portion of the gently sloped surface of the shoreline, the pressurized water flow is applied from the lower end opening of the through hole 15. The burying work can be progressed by sequentially lowering the burying block 1 while jetting.

[Embodiment] In the embodiment shown in FIGS. 1 to 5, the body 2 has an inverted truncated cone shape, and correspondingly, the head 4 and the shaft leg 3 have a cylindrical shape, and the shaft leg 3 has a tip. The portion has a conical protrusion 10.
The shoulder portion 7 is integrally formed in a disc shape so as to form an extension of the shaft leg body. Two locking projections 13 are provided on both sides of the upper end portion of the continuous rod portion 8 at intervals of 180 degrees, and two relief groove portions 12 are also formed on the diameter of the vertical through hole 5 correspondingly. The vertical groove 19 is provided on the outer end surface of the locking projection 13, and the vertical groove 18 on the inner peripheral surface of the recess 11 is provided with the escape groove portions 12 to 9.
They are provided 0 degrees apart.

After inserting the shaft leg 3 into the vertical through hole 5 of the body 2 and projecting the locking projection 13 into the recess 11, the shaft leg 3 is rotated 90 degrees, so that the vertical groove 19 on the shaft leg 2 side and the body 2 side. Vertical groove 18
Face each other. The connecting member 9 made of a metal rod is inserted into the vertical groove 19 and the vertical groove 18.

The connecting member 9 may be formed by filling cement mortar or synthetic resin-based joint material between the vertical grooves 18 and 19 at the construction site instead of inserting the ready-made pipe material or bar material. The locking projection 13 is fixed to the head 4 of the body 2 by the hardening of the bonding material. Further, if the two are engaged with each other to a certain degree, it is possible to omit the positive connection step of inserting the pipe material or the rod material or filling the bonding material.

The installation surface 20 is laid with gravel or crushed stone as needed to be compacted, and a connecting raft provided with a shaft leg insertion portion with diagonal reinforcing bars is laid at the intersection of reinforcing bars arrayed vertically and horizontally. The assembled embedded block 1 is hoisted by using the receiving metal fitting 16 that is embedded and fixed on the upper surface of the head 4, and the hanging rebar 17 that is embedded and fixed on the side surface of the head 4, and the shaft leg 3 is perpendicular to the installation surface 20. Inserted in.

The filling space 21 between the bodies 2, 2 adjacent to each other in the front-rear and left-right directions is backfilled by compactly filling the filling material such as gravel or crushed stone. The suspension rebars 17, 17 of the heads 4, 4 are connected to each other by welding or binding, and the embedded blocks 1, 1 are connected in a group. After this, the foundation concrete of the building is placed on the group of buried blocks according to the usual method.

The buried block 1 is buried underground as a member for strengthening and stabilizing the foundation ground such as buildings, roads and waterway facilities.

In the embodiment shown in FIG. 6, the upper surface of the head 4 of the body 2 is formed as a single-flow inclined surface 14, and this built-in type buried block 1 is used as a revetment member for a sandy surface layer portion of a gently inclined surface of a coastline. It is buried in the cover. In this embodiment, the embedded block 1 is sequentially lowered while injecting a pressurized water flow from the lower end opening of the through hole 15 penetrating up and down the shaft leg 3 to be embedded in the sand layer surface layer portion which is the installation surface 20. .

In each of the above embodiments, the shaft leg 3 is erected on the installation surface 20 after the body 2 and the shaft leg 3 are assembled. However, after the shaft leg 3 is inserted into the installation surface 20 first, The body 2 can also be fitted.

In the embodiment shown in FIG. 7, the body 2 has an inverted regular octagonal truncated pyramid shape, and the head 4 has a regular octagonal shape corresponding thereto,
The shaft leg 3 has a regular octagonal prism shape and has a regular octagonal pyramidal protrusion 10.

The shapes of the body 2, the shaft leg 3, and the head 4 are not limited to those shown in the figures, and various shapes such as an ellipse, a quadrangle, and a hexagon can be appropriately selected and used.

[Effects of the Invention] As described above, the embedded block 1 of the present invention is configured by being divided into the inverted truncated cone shape or the inverted truncated pyramid shape body 2 and the columnar shape or the prismatic shaft leg 3, and the head 4 of the body 2 A recess 11 is provided at the center of the upper surface of the shaft, a vertical through hole 5 having a diameter smaller than that of the recess 11 is provided at the bottom of the recess 11, and an escape groove 12 is continuously provided on the inner side surface of the vertical through hole 5, Is provided with a shoulder portion 7, a connecting rod portion 8 is provided on the upper side of the shoulder portion 7, and a locking projection 13 is provided on the upper end portion of the connecting rod portion 8. The locking projection 13 that is inserted into the through hole 5 and projects from the escape groove portion 12 into the recess 11 is formed by rotating the shaft leg 3 to form the recess 1
1 is an assembled type in which the body 2 and the shaft leg 3 are connected by engaging with the bottom surface of the body 1. Therefore, in storage and transportation, the shaft leg 3 is not fitted to the body 2 in an unassembled state. The body 2 can be stacked with, and the storage and transportation space can be effectively used three-dimensionally. Since the body 2 and the shaft leg 3 may be assembled at the site immediately before construction, the risk of damaging the root of the shaft leg 3 is reduced, and the defective product generation rate can be reduced.

Further, in another assembly type embedded block of the present invention, a vertical groove 19 is provided on the tip side surface of the locking projection 13, and a vertical groove 18 facing the vertical groove 19 is formed on the inner peripheral surface of the recess 11 and is a relief groove portion. 12
Since the connecting member 9 is inserted so as to straddle the vertical groove 18 and the vertical groove 19 to prevent the rotation of the shaft leg 3, the body 2 and the shaft leg 3 are properly assembled in a predetermined assembled state. Since the shaft leg 3 does not come off from the body 2 because it is held by, the assembly type embedded block 1 can be embedded and used in a stable state.

In still another assembly type embedded block of the present invention, the upper surface of the circular or rectangular head 4 is the single-flow inclined surface 14, and the through hole 15 for injection of the pressurized water flow is provided vertically through the shaft leg 3. The built-in type embedding block 1 can be buried as a seawall protection member on the surface layer of the sand ground on the gently sloped surface of the shoreline, and the use of the pressurized water flow injected from the through hole 15 of the shaft leg 3 facilitates this embedding work. And it can be progressed accurately.

[Brief description of drawings]

FIG. 1 is a perspective view of an exploded state of an assembly type embedded block of the present invention, FIG. 2 is a plan view of an assembly process of the embedded block, and FIG. 3 is a plan view of the embedded block after assembly is completed. Is. FIG. 4 is a sectional view taken along line AA of FIG.
The drawing is a sectional view taken along line BB in FIG. FIG. 6 is a vertical cross-sectional side view of essential parts of another buried block of the present invention in a laid state. FIG. 7 is a bottom view of still another embedded block according to the present invention in an assembled state. DESCRIPTION OF SYMBOLS 1 ... Assembly type embedded block, 2 ... Body, 3 ... Shaft leg, 4 ... Head, 5 ... Vertical through hole, 6 ... Body lower end surface, 7 ... Shoulder part, 8 ...
Connection rod portion, 9 ... Connection member, 10 ... Conical projection, 11 ... Recessed portion, 12 ... Relief groove portion, 13 ... Locking protrusion, 14 ... Shoulder flow inclined surface, 15 ... Pressurized water jet injection through hole, 16 ... Bracket, 1
7 ... Hanging rebar, 18 ... Vertical groove, 19 ... Vertical groove, 20 ... Installation surface, 21 ... Packing space

Claims (4)

[Claims] 1. A concave portion 1 is formed in a central portion of an upper surface of a circular or square head 4.
1, a vertical through hole 5 having a diameter smaller than that of the concave portion 11 is provided on the bottom surface of the concave portion 11, and an escape groove portion 12 is continuously provided on an inner side surface portion of the vertical through hole 5 to form an inverted truncated cone or inverted truncated pyramid trapezoidal body 2.
And a shoulder portion 7 with which the lower end surface 6 of the body 2 abuts is provided in an intermediate portion, and a connecting rod portion 8 inserted into the vertical through hole 5 of the body 2 is provided above the shoulder portion 7 so as to project. It is composed of a columnar or prismatic shaft leg 3 provided with a locking projection 13 which is inserted into the clearance groove portion 12 at the upper end of the rod portion 8.
An assembly type embedded block that engages with the bottom surface of 1 to connect the body 2 and the shaft leg 3. 2. A vertical groove 19 is provided on the tip side surface of the locking projection 13, and a vertical groove 18 facing the vertical groove 19 is provided at a position on the inner peripheral surface of the recess 11 which does not hit the escape groove 12. The assembly type embedded block according to claim 1, wherein the connecting member 9 is inserted across the vertical groove 18 and the vertical groove 19 to prevent the pivot leg 3 from rotating. 3. The assembly type embedding device according to claim 1, wherein the upper surface portion of the circular or prismatic head portion 4 is a single-flow inclined surface 14, and a through hole 15 for jetting a pressurized water flow is provided vertically through the shaft leg 3. block. 4. An upper surface of a circular or prismatic head 4 is used as a single-flow inclined surface 14, and a through hole 15 for injection of a pressurized water flow is provided vertically through the shaft leg 3, and a vertical groove is formed on the tip side surface of the locking projection 13. 19 is provided, the vertical groove 18 facing the vertical groove 19 is provided at a position on the inner peripheral surface of the recess 11 that does not hit the escape groove portion 12, and the connecting member 9 is provided across the vertical groove 18 and the vertical groove 19. The assembly type embedded block according to claim 1, which is inserted to prevent the pivot leg 3 from rotating.