JPS6251330B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, a pile hole corresponding to the size of the H-section steel is bored using a boring machine, the H-section steel is pushed into the hole, and mortar is injected deep into the hole. It was designed to make the same H-shaped steel self-supporting (Japanese Patent Application Laid-Open No. 52-141007
issue). However, the boring machine required water to be supplied to the rotary bit at the tip of the rotary rod, making the equipment complex, requiring a great deal of time to move the installation position, and requiring the machine to be made self-supporting by the mortar.

The present invention is an earth retaining method that allows pile holes to be drilled simply and quickly, and the position of the hole to be moved quickly, and that allows H-shaped steel to stand on its own by simply pushing it in without using mortar, etc., for narrow roads. The purpose of this project is to simply and quickly carry out earth retaining construction in conjunction with excavation of sewerage works.

The present invention involves drilling a hole in the ground using a downward pneumatic rock drill that is fed along a guide, and drilling an H-beam steel pile with an outer diameter larger than that of the hole in the downward direction. By lowering the main body of the rock machine and pushing it in with the impact force, H-shaped steel piles are placed under the ground in advance, and then the ground is excavated along the row of the piles, and the adjacent H-shaped steel piles are dug as the excavation depth progresses. An earth retaining method characterized by stacking steel sheet piles downward with both side edges locked in opposing grooves of steel piles, and stacking upper sheet piles, which are thinner than the lower sheet piles, to form an earth retaining wall. It is related to.

To explain the embodiment of the present invention shown in the drawings, a drill feeding guide 3 which can be raised and lowered is provided at the front of a traveling vehicle body 2 using a crawler track 1, and a main body 5 of a pneumatic rock drill 4 is slid on the guide 3. A crawler drill 7 is used which is freely supported and has a hollow rock drilling rod 6 detachably attached to the main body 5.
The rock drill 4 faces downward, and the hollow rod 6 is removably screwed through the sleeve 8.
The crawler drill 7 is mounted on the lower end of the guide, the crawler drill 7 is run on the road, the lower end of the guide 3 is supported on the ground 10, the guide 3 is adjusted for surveying and fixed vertically, and the same is drilled into the rock. The machine 4 is operated to drill a pile hole 11 in the ground 10 using the bit 9. After drilling, the main body 5 is raised along the guide 3 to remove the rod 6 from the same hole 11, and the sleeve 8 is removed from the main body 5 to separate the rod 6 from the main body 5, and the attachment 12 is inserted in place of the sleeve 8. 5
The upper end of the H-shaped steel pile 13 is supported by the attachment 12, and the lower end is aligned with the pile hole 11 (this state is shown by the imaginary line in FIG. 3).
In this state, when the rotating mechanism of the main body 5 is stopped and only the vibration impact mechanism is operated, the main body 5 is lowered along the guide 3, and the impact force of the main body 5 forces the pile 13 into the pile hole 11. The outer diameter of this H-shaped steel pile 13 is larger than the hole diameter of the pile hole 11, as shown in FIG.
mm, the diagonal length (outer diameter) of the 125×125mm H-beam steel pile 13 is 175mm). Due to the lowering of the main body 5 and the impact force, the pile 13 has its upper end at the level of the ground 10 or the ground 10. It is better to push the pile hole 11 into the lead hole all the way to the bottom so that the upper end of the pile 13 does not protrude above the ground 10. Such H-shaped steel pile 13
As shown in FIG. 4, the piles are placed in advance in two rows, and the intervals between adjacent piles 13, 13 are arranged as precisely and evenly as possible. After that, as shown in Figure 5, the power shovel 1
Ground 10 along the row by 4 (trade name Yumbo)
The adjacent H-beam steel pile 1 is excavated as the excavation depth progresses.
Both side edges of the steel sheet pile 16 are directly or indirectly locked in the opposing grooves 15 and 15 of No. 3 and 13 (indirectly means by horizontal protrusions etc. provided on both side edges), and the excavation depth is As progress progresses, the steel sheet pile 16 is cut into the groove 1.
The steel sheet piles 16' having a thickness thinner than the thickness of the same sheet piles 16 are slid down along the lower sheet piles 16 and stacked on top of the lower sheet piles 16 which have been lowered, and are stacked one after another in several stages to form an earth retaining wall. A sewer pipe 18 is disposed at the bottom of a groove 17 formed by the same wall (FIG. 13).
The width of steel sheet pile 16 is 550mm, 705mm, 960mm,
1220mm and 1750mm products are arranged by size, and the board thickness for each size is arranged from 22mm to 9mm. For example, 22mm thick x 1220mm wide x 705mm high are stacked in 2 to 3 tiers on the bottom row, and 16mm thick is stacked on top of that. Stack 12mm thick x 1220mm wide x 705mm high items on the top layer.
Stack the pieces with a height of mm (see Figure 15). In addition, what is shown by 19 in the figure is a stop plate for connecting the upper and lower steel sheet piles 16, 16', 20 is a raised plate, 21 is a raised plate 20,
A support supporting 20, 22 is an H-shaped steel pile 13,
13 is a support, 23 is a support between the steel sheet piles 16, 16, and 24 in FIG. 14 is a support support protrusion.

Since the present invention is based on the above-mentioned construction method, the downward pneumatic rock drill 4 can be carried into a narrow road or a densely populated area, and the pile hole 11 can be drilled very simply and quickly without the need for water supply using the same rock drill 4. At the same time, the H-shaped steel pile 13 is quickly drilled into the same hole 11 by the impact of the main body 5 of the rock drilling machine 4.
The H-beam steel pile 13 can be made to stand on its own in the ground without injecting mortar into the ground. In addition, the earth retaining wall of the groove 17 formed along the row of the same piles 13 has a large thickness of the lower sheet pile 16 in the deep part, and the thinner sheet piles 16' are stacked toward the top, so that the retaining wall goes deeper. The earth retaining wall can be safely held in response to the earth pressure P (Fig. 15) which increases accordingly.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the state of pile hole construction in the earth retaining method of the present invention, Fig. 2 is a side view of the H-section steel pile driving state, Fig. 3 is a plan view of the preceding pile hole, and Fig. 4 is the preceding A plan view of the pile, Fig. 5 is a side view of the excavation state, Fig. 6 is a plan view of Fig. 5, Fig. 7 is a side view of the sheet pile construction, Fig. 8 is a plan view of Fig. 7, and Fig. 9 is a plan view of the excavation state. A side view of the stacked sheet piles in two stages, Fig. 10 is a plan view of Fig. 9, and Fig. 11
The figure is a side view of three stacked sheet piles, and Figure 12 is the first one.
Figure 1 is a plan view, Figure 13 is a longitudinal cross-sectional view of sewerage construction, Figure 14 is an enlarged cross-sectional view of the state in which the H-shaped steel pile and steel sheet pile are engaged, and Figure 15 is a vertical cross-sectional view of the state of earth pressure. be. 3... Guide guide, 4... Downward pneumatic rock drill, 1
0... Ground, 11... Pile hole, 13... H-shaped steel pile, 5... Main body, 15... Opposing groove, 16... Steel sheet pile, 16'... Upper sheet pile.

Claims (1)

[Claims] 1 A pile hole 11 is drilled in the ground 10 by a downward pneumatic rock drill 4 that is fed along the guide 3, and an H-shaped steel pile with an outer diameter larger than the hole diameter is inserted into the pile hole 11. 13 by lowering the main body 5 of the downward rock drilling machine 4 and pushing it in with impact force, the H-beam steel piles 13 are pre-erected under the ground, and then the H-shaped steel piles 13 are driven into the ground 1 along the row of the same piles 13.
0 is excavated, and as the excavation depth progresses, both side edges of the steel sheet piles 16 are locked in the facing grooves 15, 15 of the adjacent H-shaped steel piles 13, 13 and stacked downward, and the lower sheet piles 16 are
This earth retaining method is characterized in that an earth retaining wall is formed by stacking upper sheet piles 16' that are thinner than the upper sheet piles 16'.