JPS5911004B2 - How to construct seawalls, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a method of constructing a quay or a quay constructed on soft ground.

Conventionally, when constructing a quay wall or revetment on soft ground, as shown in Figure 1, the soft ground 1 on the seabed is excavated and scrapped, replaced with high-quality earth and sand material 2, and then rubble is added to it. Create mound 3 by
Install.

With this conventional method, there are problems with the disposal of excavated soft soil, and there are also problems such as a shortage of replacement top sand and stones for mounds, and the use of high quality soft soil materials. Replacement and construction of mounds require the construction costs of many people and a long construction period.

Also, a large L is installed on the mound created in this way.
The mold block has a bottom plate front leg, buttresses, etc., and its production requires a large number of people and equipment and a long construction period.

The present invention aims to solve the problems of such conventional methods, simplify the construction, economize the materials used, and shorten the construction period. In addition to improving the ground by injecting and mixing the solidifying agent, supporting materials such as piles or anchors are buried in the improved ground, and then concrete blocks for walls with buttresses on the rear are arranged on the improved ground. At the same time, the method for constructing a seawall or the like is characterized in that the supporting material is inserted into a hole previously provided in the buttress, and the hole is filled with grout 1 to be integrated with the supporting material.

Next, an embodiment of the present invention will be described based on the drawings from FIG. 2 onwards.

This embodiment is an example of constructing a quay on soft ground on the seabed.

First, as shown in FIG. 2, a conventionally used solidifying agent such as cement milk is injected into the soft stratum 10 of the seabed and mixed with the soft stratum 10 to form an improved ground 11 of an appropriate width.

After the consolidation agent is injected and mixed in this manner, and before the improved ground 11 is solidified by the consolidation agent, piles 12 are driven at regular intervals as shown in Figure 3 (, It is made to protrude onto the improved ground 11-H.

The pile 12 is made of H-type steel, for example.

1. After the improved ground 11 has solidified, a wall concrete block 13 is installed on the improved ground 11. 3. This wall concrete block 13 has a plate-shaped wall section 14 as shown in FIG. An L-shaped buttress 15 is integrally formed on the back surface of the wall portion 14, and a pile insertion hole 16 is formed in a protrusion 15a on the rear surface of the lower end of the buttress 15, and a protrusion for sliding on the bottom surface is formed. 14b, 15b and a bottom plate is used.

When installing the wall concrete block 13 on the improved ground 11, a pile insertion hole 1 is inserted into the aforementioned pile 12.
6 is fitted, and the both side edges of the wall surface portion 14 of each concrete block 13 for walls are butted against each other and installed one after another.

In this way, the wall concrete blocks 13 are sequentially installed and the pile insertion holes 16 are filled with grout 11, so that the piles 12 and the buttresses 15 are integrated.

Thereafter, if necessary, an upper cast-in-place concrete IJ-N8 is placed on the upper end of the wall concrete block 13, and the backfill soil 19 is used as a quay on the back side of the wall concrete block 13.

The piles 12 may be buried after the improved ground 11 has solidified; in this case, after drilling a hole with an appropriate drilling machine, the piles 12 are inserted into the holes and grouted with mortar etc. to fix the piles 12. do.

The present invention is constructed as described above, and improves the soft ground at necessary locations by injecting and mixing a consolidation agent such as Shichimen 1 and milk without replacing the soft ground with good quality earth and sand materials. By arranging concrete blocks for walls directly on -F, there is no need for an excavator to replace the earth and sand, and there is no need for excavators to replace the earth and sand. There is no need to prepare materials such as rubble, and the number of workpieces is greatly reduced, and the construction period is significantly shortened.

Furthermore, the improved ground made by injecting and mixing a curing agent can be made relatively high in strength, and by integrating the concrete blocks for walls arranged on top of it with piles or anchors buried in the improved ground, the wall structure can be strengthened. Therefore, it is possible to use a concrete block without using a bottom plate, and the amount of equipment and materials required for block production is reduced, and together with the simplicity of construction, it is possible to significantly reduce costs. reduction is achieved.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a quay constructed using the conventional construction method, Figure 2 and the following drawings show examples of the implementation of the present invention, Figure 2 is a cross-sectional view showing the formation of improved ground, and Figure 3 is a wall FIG. 4 is a perspective view of the concrete blocks for walls, and FIG. 5 is a cross-sectional view of the quay in a completed state. 10...Soft ground layer, 11...Improved ground, 12...Pile, 13...Concrete block for wall, 14...Wall surface part , 1 5. ．．
．． ．． ．． ．． Buttress wall, 16...Pile insertion hole, 11...
... Grout, 18 ... Upper part cast-in-place concrete 1, 19 ... Backfill earth and sand.

Claims (1)

[Claims] 1. Inject and mix a solidifying agent into the soft seabed ground 2. Improve the ground, and then add the solidifying agent and mix it. Wall conch with buttresses! At the same time as the J-1 block is installed on the improved ground, the support material is inserted into a hole previously provided in the buttress, and the hole is filled with grout to integrate it with the support material. How to construct seawalls, etc.