JPH06974B2 - Joint structure of connected block structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a joint structure suitable for, for example, a piled connection block structure constructed as an offshore structure such as a breakwater.

"Prior Art" Conventionally, a pile connection block structure constructed as this type of offshore structure has a structure as shown in Figs. 4 and 5, for example. That is, as shown in FIG. 4, this piled connection block structure is based on a plurality of piles 2 driven into the seabed 1, has holes 3 at both ends, and has a flat upper surface and lower surface. A plurality of blocks (hereinafter referred to as blocks) 4 are piled up in a lattice form while spanning between the piles 2 in a state where the piles 2 are loosely inserted in the holes 3.

The pile 2 and the block 4 are suspended from the vicinity of the upper end of the pile 2 by a PC steel material 7 to grip the pile 2 and hold the block 4 from below, and a hole 3 in the concrete block 4. The piles 2 are integrally connected by a filling mortar (grout material) 6 filled between the piles 2. In addition, the device 5 is, as shown in FIG.
PC steel material 7 suspended along with, and an annular member 8 fixed to the tip of the PC steel material 7 with the pile 2 loosely inserted.
And a cone whose head is cut is divided into a plurality of parts in the axial direction (for example, 30%), and the PC steel material 7 is placed on each of the annular members 8 to grip the pile 2. The pile gripping member 9 is placed, and the pile gripping member 9 is taper-fitted from above to grip the pile 2 and an annular holding member 10 that holds the block 4 from below.

By the way, as a joint between blocks in such a connected block structure, one of the prior arts is a method of providing joints made of an underwater curing type resin adhesive or the like.

However, with such a method, the cost tends to be high, and since the curing thereof starts in a relatively short time, the pot life is short, and it is difficult to use it especially at sea construction which is affected by wind and waves. There was a point. In addition, there is a problem that once the joint material is hardened before joining, it is difficult to peel it off and the joining cannot be redone.

Therefore, there is a demand for a concrete joint material that can reduce the cost and that can exhibit the function as the joint structure.

However, with the means of simply applying concrete or mortar between the joint surfaces of the blocks, it is difficult to fill the entire joint surface with a hard kneading material, and conversely, with a soft material, concrete or mortar leaks from the joints at the time of joining. There is. Especially when there is a block joint in water, there was a problem that mortar and concrete were washed away by waves and tidal currents.

"Problems to be Solved by the Invention" The present invention is intended to solve the following problems in the above-described conventional art.

First, in joint materials such as water-curable resin adhesives,
The cost is high, the pot life is short, and once the block is set, it is not possible to rejoin.

Secondly, in the conventional joint structure, it is difficult to construct the concrete joint material, and the workability thereof is poor.

The present invention has been proposed in view of the above circumstances, and an object thereof is a connectable block structure that has good workability, can reliably perform the function as a joint between blocks, and can reduce costs. To provide a joint structure for objects.

"Means for Solving the Problem" Therefore, the first invention is a pile driven into the ground, a precast concrete block that is stacked in a state where the pile is loosely inserted in a hole, and a device that holds these precast concrete blocks from below. And a connecting block structure in which the block is integrally connected to a pile by a grout material filled in the hole, in a joint surface on the lower surface side of the block located above among the joint surfaces of the block. , The inner diameter of the joint surface is gradually expanded at a constant angle toward the outer peripheral end of the joint surface to form a continuous joint joint void in the hole of the block, and the joint joint gap is filled with the grout material. It is a feature.

A second invention is a PC in which the blocks are arranged along a connecting direction between the blocks or through the blocks.
It is integrated by the tension of the steel material.

[Operation] In the joint structure of the block structure having such a configuration, the grout material filled between the outer periphery of the pile and the holes of the stacked blocks is formed on the joint surface of the block. Since the inner diameter enters into the tapered joint joint gap that gradually expands toward the outer peripheral end of the joint surface at a constant angle and the joint surface is integrated to form the joint portion, the structure is extremely strong.

Further, since the joint structure can be formed at the same time when the grout material is filled in the holes of the block, the construction is simple and inexpensive.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. In the following description, the same parts as those of the conventional example shown in FIGS. 4 and 5 are designated by the same reference numerals to simplify the description.

FIG. 1 shows a half cross-sectional view of a piled connection block structure in a constructed state, and this piled connection block structure is provided between a plurality of piles 2 driven into the seabed 1, A bar-shaped block 4 having holes 3 at both ends and having flat upper and lower surfaces is bridged over the holes 3 in a state where the piles 2 are loosely inserted, and is constructed by stacking a plurality of stages in a grid pattern. The block 4 is loaded on the receiving block 14 arranged at the lower part of the pile 2, and the pile 2 and the block 4 are different from each other.
And the grout material 6 with which the holes 3 are filled together.

The joint surface 4a of the block 4 located on the lower surface among the joint surfaces of the block 4 has a constant inner diameter toward the outer peripheral end of the joint surface 4a, for example, a gentle slope of 10 ° to 45 ° with respect to the horizontal plane. Tapered space that gradually expands (joint joint void)
15 is formed continuously with the hole 3 of the block 4. The cavities 15 are filled with the grout material 6. The inclination angle of the taper-shaped space 15 is, for example, 10 ° to 45 ° with respect to the horizontal plane. However, if this is made a steep slope of 45 ° or more, for example, wedges due to the accumulated load of the own weight of the stacked blocks 4 are formed. Depending on the effect, this void 15
The grout material 6 filled in may be damaged. on the other hand,
If the inclination angle is, for example, 10 ° or less, there is a problem that it becomes difficult to reliably fill the cavities 15 with the grout material 6. On the other hand, as described above, the above-mentioned problem can be avoided by setting the inclination angle of the tapered void 15 to be 10 ° to 45 ° with respect to the horizontal plane. In the case of the illustrated example, this void 15 is formed concentrically with the hole 3 of the block 4 over substantially the entire area of the joint surface 4a, and
A water blocking packing 16 for preventing leakage of the grout material 6 is arranged on the joint surface at the periphery of the void 15 (see FIG. 3).

The grout material 6 to be filled in the holes 3 of the block 4 is a high-strength / no-breathing type prepact mortar or underwater that has a hardening strength equal to or higher than that of a concrete block and does not cause a bleeding phenomenon. Examples thereof include concrete, but are not limited thereto.

Next, the case where the joint structure of the connecting block structure configured as described above is actually provided at the site will be described. First, the pile 2 is driven into the seabed 1 and the receiving block 14 is set under the pile 2. The block 4 is stacked on the upper surface of the receiving block 14 with the packing 16 interposed therebetween, and the block is installed in a predetermined shape and size. Then, when the holes 3 of the block 4 are filled with grout material 6 such as no-bleathing prepact mortar, the state shown in FIG. 1 is established.

The construction of this connection block structure is a simple operation of driving the piles 2 into the seabed 1, setting the receiving blocks 14, stacking the blocks 4, and filling the grout material 6,
The joint portion between the blocks 4 is formed by the grout material 6 entering into the tapered space 15 when the grout material 6 is injected into the hole 3, so that the escape of air in the space 15 is prevented. The workability can be improved and the cost can be reduced. Moreover, because of this, unlike the conventional case, it is not necessary to construct joints at the time of stacking blocks, so that when the blocks 11 are installed in water, the joint material is not washed away by waves, tidal currents or wind. , It can be constructed without being affected by the weather conditions at the site. Further, there is an advantage that the block 4 can be set again before the grout material 6 is filled. Since the packing 16 is provided between the joint surfaces when the grout material 6 is filled, the grout material 6 does not leak from the joint portion.

Now, in the case where the joint structure in the connected block structure has such a structure, the grout material 6 filled in the holes 3 of the block 4 is filled in the space 15 and the joint surface is integrated to form a joint portion. , The structure is extremely strong. Moreover, since the blocks 4 are stacked through the voids 15, they absorb the unevenness of the surface of the blocks, and therefore,
There is also an advantage that stress transmission is uniform when an axial force and a bending moment are applied.

In addition, in the above-mentioned embodiment, in order to improve the adhesive force between the stake 2 and the block 4 and the grout material 6, the outer periphery of the stake 2 and the inner periphery of the block 4 may be perforated. good. Further, in the illustrated example, the block 4 is stacked as an example of the connected block structure and the block 4 and the pile 2 are integrated by the grout material 6, but as in the conventional example shown in FIG. 4 and the like. Needless to say, the present invention can be applied to a structure in which the block 4 is further integrated by the PC steel material 7.

"Effects of the Invention" As described above, according to the present invention, the following excellent effects are exhibited.

(a) On the lower joint surface of the block that is located above the joint surface of the block, a taper joint joint gap whose inner diameter gradually increases at a constant angle toward the outer peripheral end of the joint surface is formed in the hole of the block. Since it is formed continuously, the joints can be constructed at the same time by filling the block holes with grout material, and the blocks can be easily stacked again, improving the workability. can do.

(b) In addition, since the joint joint gap is filled with the grout material filled in the holes of the block and the blocks can be integrated, an expensive joint material such as an underwater curing resin adhesive is used. It is not necessary and can contribute to cost reduction.

(c) Since the joint voids formed on the joint surface are formed and the joint joint voids are filled with grout material, the unevenness of the joint surface can be absorbed, so that an axial force and a bending moment are applied. In the case of stress, there is an advantage that the stress is evenly transmitted.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a cross-sectional view of a piled connection block structure with a part cut away, FIG. 2 is a cross-sectional view of a main part, FIG. 3 is a plan view showing a joint surface of a precast concrete block, FIG. 4 and FIG. FIG. 5 shows a conventional example of a piled connection block structure in the case of a breakwater, FIG. 4 is a perspective view with a part cut away, and FIG. 5 is a sectional view thereof. 1 ... sea floor, 2 ... pile, 3 ... hole, 4 ... precast concrete block, 5 ... device, 6 ... grout material, 7 ... PC steel material, 8 ... annular member, 9 ... pile gripping Member, 10 ... holding member, 14 ... receiving block, 15 ... void, 16 ... packing.

Front Page Continuation (72) Inventor Yoshito Hatayama 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Yoshihiro Nakatani 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Stocks In-house (72) Inventor Tomohiro Bessho 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (56) Reference JP 53-83331 (JP, A) JP 61-17616 (JP) , A) Japanese Patent Publication No. 46-30661 (JP, B1)

Claims (2)

[Claims] 1. A pile including a pile driven into the ground, a precast concrete block that is stacked in a state where the pile is loosely inserted in the hole, and a device that holds the precast concrete block from below, the block being in the hole. In a connecting block structure integrally joined with a pile by a grout material filled in, the inner surface of the joint surface of the lower side of the block located above the joint surface of the block has an inner diameter at the outer peripheral end of the joint surface. A joint block structure characterized in that a tapered joint void which gradually expands toward a certain angle is continuously formed in the hole of the block, and the joint void is filled with the grout material. Joint structure. 2. The connection block structure according to claim 1, wherein the blocks are integrated by a tension of PC steel material arranged along a connecting method of the blocks or penetrating the blocks. Joint structure.