JPH0745628Y2 - Expandable steel sheet pile - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention prevents sediment collapse during excavation work in simple civil engineering works (test digging, general pipe laying, etc.), and is safe and efficient in the digging hole. The present invention relates to a stretchable steel sheet pile that can be worked well.

[Conventional technology]

Generally, in excavation work in simple civil engineering works, earth retaining work as shown in Fig. 7 was performed to prevent the collapse of the sediment. That is, a plurality of steel sheet piles 13 are erected along the left and right inner wall surfaces of the excavation hole, the worker enters the excavation hole, and the steel sheet pile 13
The abdomen uplifting member 14 is laterally pressed against, the elastic members 15 are installed at both ends of each abdomen uprighting member 14 at the left and right corresponding positions, and the elastic members 15 are extended to expand the steel sheet pile 13. Further, the soil retaining work was performed by fixing the member 14 for raising the abdomen.

And, conventionally, steel sheet pile (trench sheet) 13 is placed on the ground GL.
After excavating about 50 to 60 cm, install it in the excavation hole. After excavating to some extent, the head of the steel sheet pile 13 is hit with a mallet or the like to push down the steel sheet pile 13 as shown by the chain double-dashed line in FIG. The excavated earth and sand can be carried out with a steel sheet pile such as a scoop.
It was carried over the upper end of 13 and out of the drill hole.

[Problems to be solved by the device]

However, the minimum height of the steel sheet pile 13 is 2 m, and even when using this minimum steel sheet pile 13, it is necessary to carry out earth and sand etc. over the steel sheet pile 13 of 2 m, but Workability is poor because the steel sheet pile 13 cannot be lifted all the way up, and some parts may fall.

In addition, especially when working at a depth of about 1 to 2 m,
It is not uncommon for steel sheet piles to fall under the pressure of earth and sand.

Therefore, there is a problem not only in workability but also in safety.

This invention was made in view of the above problems,
An object of the present invention is to provide a stretchable steel sheet pile that enables safe and efficient work in a drill hole.

[Means for Solving the Problems]

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the expansion | extension steel sheet pile of this invention consists of the lip groove type outer steel sheet pile 1 and the lip groove type inner steel sheet pile 2, and the said lip groove type outer steel sheet pile 1 is a back lower part. It has a horizontally long slot 4, has a recessed groove 9 that reaches the slot 4 from the upper back surface, has L-shaped plates 7 at the top and bottom of the lip 1b, and the inside of the lip groove type steel sheet pile 2 is It has a hook 3 at the upper part of the back surface, an L-shaped plate 7 at the bottom of the lip 2b, and the inside of the lip groove type outer steel sheet pile 1 is provided with the inside of the lip groove type inner steel sheet pile 2. The hook 3 of the lip groove type inner steel sheet pile 2 is slidably accommodated in the concave groove 9 of the lip groove type outer steel sheet pile 1, and the lip groove type inner steel sheet pile 2 is the lip groove type outer steel sheet pile. 1
The hook 3 of the lip groove type inner steel sheet pile 2 is configured to engage with the long hole 4 of the lip groove type outer steel sheet pile 1 when it is relatively lowered.

[Action]

Since the lip groove type inner steel sheet pile 2 slides in the lip groove type outer steel sheet pile 1 and is expandable and contractible, the lip groove type outer steel sheet pile 1 is slightly projected in advance on the ground to form a side surface of the excavation hole. When is pressed to fix and the excavation is advanced, only the lip groove type inner steel sheet pile 2 can be lowered while facing the side surface of the excavation hole. Below the lip groove type outer steel sheet pile 1, the lip groove type inner steel sheet pile 2 faces the side surface of the excavation hole, so that collapse of the earth and sand can be prevented over the entire excavation hole.

〔Example〕

An embodiment according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing the structure of a stretchable steel sheet pile according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a side view of FIG. 1, and FIG. 4 is a rear view of FIG. 5, FIG. 5 is an enlarged view of part A in FIG. 3, FIG. 6 (a) is an explanatory view showing a usage state, and FIG. 6 (b) is a sectional view taken along line VI-VI in FIG. 6 (a). Is.

As shown in FIG. 1, the main constituent members of the expandable steel sheet pile according to the present invention are a lip groove type outer steel sheet pile 1 and a lip groove type inner steel sheet pile 2. The lip groove type outer steel sheet pile 1 and the lip groove type inner steel sheet pile 2 are formed by forming a lightweight steel plate, a mesh plate or the like into a lip groove type. An inner steel sheet pile 2 of the mold is slidably arranged so that it can be expanded and contracted as a whole. Both steel sheet piles are removable.

In the lower part of the back surface 1a of the lip groove type outer steel sheet pile 1, two laterally elongated holes 4 are symmetrically opened. Inside the rear surface 1a of the lip groove type outer steel sheet pile 1, two concave grooves 9 are provided in parallel from the upper portion of the rear surface 1a to the elongated hole 4.

Two inverted L-shaped hooks 3 are provided on the outside of the back surface 2a of the lip groove type inner steel sheet pile 2 with the vertical portion facing downward at the same pitch as that of the concave grooves 9 arranged side by side. The hooks 3 are slidably housed in the concave grooves 9 in a state where the lip groove type inner steel sheet pile 2 is arranged inside the lip groove type outer steel sheet pile 1. When the lip groove type inner steel sheet pile 2 descends relative to the lip groove type outer steel sheet pile 1, the hook 3 slides in the concave groove 9, and when the hook 3 enters the long hole 4, as shown in FIG. As shown in the drawing, the elongated hole 4 acts as a stopper to stop the lowering of the lip groove type inner steel sheet pile 2 and prevent the accidental disengagement.

An L-shaped plate 7 is projected from the upper and lower portions of the lip 1b of the lip groove type outer steel sheet pile 1 and the lower portion of the lip 2b of the lip groove type inner steel sheet pile 2 with the vertical portion facing upward. The belly-raising member 8 can be mounted horizontally. When the elastic member 12 is inserted between the abdominal waving members 8 which are laterally laid on the outer steel sheet pile 1 of the lip groove type constituting the elastic steel sheet piles arranged on both sides of the excavation groove, the outer steel sheet pile 1 of the lip groove type is formed. The outer steel sheet pile 1 of the lip groove type is pressed against the side surface of the excavation groove and is fixed to the side wall of the excavation groove by the frictional force with the soil on the side wall of the excavation groove.

It is convenient for installing and transporting the stretchable steel sheet pile, and the lip groove type outer steel sheet pile 1 has a gripping portion on the top thereof for easy gripping when installing the lip groove type outer steel sheet pile 1. The plate 10a is fixed. Further, at the top of the lip groove type inner steel sheet pile 2, this is formed on the lip groove type outer steel sheet pile 1
Plates 10b for gripping when inserting into each are fixedly provided.

The openings 1c, 2c of the lips 1b, 2b of the lip groove type outer steel sheet pile 1 and the lip groove type inner steel sheet pile 2 are provided with reinforcing plates 6a, 6b for preventing deformation at appropriate intervals. There is. Further, in order to prevent the lip groove type outer steel sheet pile 1 and the lip groove type inner steel sheet pile 2 from falling off when they are conveyed in an assembled state, pin holes 11 are provided in each of them.
Pins between 1 and 11 are fixed or wires are connected.

Next, a case of performing soil retaining work for an excavation hole using the expandable steel sheet pile of the present invention will be described. When excavating the excavation hole, first excavate the ground up to about 50 cm from the ground GL by machine or human power, but if it goes deeper than that, there is a risk of damaging the buried objects such as water pipes, gas pipes, and electric pipes. , Excavate manually while checking.

At this time, as shown in FIG. 6, the worker enters the excavation hole after installing the expandable steel sheet pile according to the present invention in order to prevent the sediment collapse. A lip groove type inner steel sheet pile 2 is put in a lip groove type outer steel sheet pile 1, and this lip groove type inner steel sheet pile 2 is inserted.
With the bottom of the excavation hole located on the lower surface of the excavation hole, both sides of the excavation hole are set up side by side, and the side surface of the excavation hole is pressed by the belly-raising member 8 and the elastic member 12 to prevent the collapse of earth and sand or the like.

The lip groove type outer steel sheet pile 1 has a top of 10 to 20 cm from the ground GL.
It is fixed to the side surface of the drilling hole in a state where it is slightly exposed, and when the drilling is advanced, the inner steel sheet pile 2 of the lip groove type naturally descends due to its own weight as the lower surface of the drilling hole becomes lower. The state shown by the inner steel sheet pile 2'is obtained. Since the lip groove type outer steel sheet pile 1 is fixed to the side surface of the excavation hole as described above, it does not descend, and only the lip groove type inner steel sheet pile 2 descends.

When the lip groove type inner steel sheet pile 2 descends, the hooks 3 provided on the lip groove type inner steel sheet pile 2 are recessed into the groove 9 provided on the lip groove type outer steel sheet pile 1.
When it slides down and descends and engages with the long hole 4 provided in the lip groove type outer steel sheet pile 1, the lip groove type inner steel sheet pile 2
It is as described above that the descent of No. stops.

Even if the inner steel sheet pile 2 of the lip groove type is lowered by excavation, the outer steel sheet pile 1 of the lip groove type does not move and maintains a height of 10 to 20 cm above the ground. It is extremely efficient and safe.

Even if the inside of the lip groove type steel sheet pile 2 is lowered, it is always opposed to the side surface of the excavation hole and is supported by the outside steel sheet pile 1 of the lip groove type, so that there is no fear of tipping over and prevention of sediment collapse. Is effective for. When the lip groove type inner steel sheet pile 2 descends uniformly, L provided on the lower portion of the lip groove type inner steel sheet pile 2
Since the belly-raising member 8 can be placed horizontally on the character plate 7,
Reinforcement can be strengthened.

Further, when the lip groove type inner steel sheet piles 2 on both sides of the excavation hole are lowered substantially at the same level, it is possible to interpose the elastic member 12 between the bellow raising members 8, so that the reinforcement is further strengthened. can do. By strengthening such reinforcement, it is possible to reliably prevent the collapse of the earth and sand.

When it is necessary to further deepen the expansion steel sheet pile, the top portions of the lip groove type outer steel sheet pile 1 and the lip groove type inner steel sheet pile 2 may be pushed.

In this embodiment, the hook 3, the concave groove 9 and the elongated hole 4 are provided two by two, but one hook, or three or more hooks may be provided.

[Effect of device]

According to this invention, since the lip groove type inner steel sheet pile is slidably (expandable) arranged in the lip groove type outer steel sheet pile, the lip groove type outer steel sheet pile is pressed against the side surface of the excavation hole in advance. Since the lip groove type inner steel sheet pile descends by its own weight as the excavation hole is excavated, this expandable steel sheet pile can correspond to the excavation depth.

The top of the lip groove type outer steel sheet pile is only about 10 to 20 cm above the ground, and the height of the lip groove type outer steel sheet pile does not change even when the lip groove type inner steel sheet pile descends. Not only is it extremely efficient, but it is also sufficiently safe.

Further, not only the outer grooved steel sheet pile of the lip groove type but also the lowered part of the inner steel sheet pile of the lip groove type always faces the side surface of the excavation hole, so that the collapse of the sediment can be prevented even if the excavation is continued.

Further, this stretchable steel sheet pile has an expandable structure of a lip groove type outer steel sheet pile and a lip groove type inner steel sheet pile, so that during transport, a lip groove type outer steel sheet pile and a lip groove type inner steel sheet pile It is possible to reduce the weight by disassembling into.

[Brief description of drawings]

1 is a perspective view showing the structure of a stretchable steel sheet pile according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a side view of FIG. 1, and FIG. 4 is a rear view of FIG. 5, FIG. 5 is an enlarged view of part A of FIG. 3, FIG. 6 (a) is an explanatory view showing a use state, FIG. 6 (b) is a sectional view taken along line VI-VI of FIG. 6 (a), Figure 7 (a)
Is an explanatory view showing a conventional use state, and FIG. 7 (b) is a sectional view taken along the line VII-VII of FIG. 7 (a). 1 …… Rip groove type outer steel sheet pile, 1a …… Rear side 1b …… Lip, 1c …… Aperture 2 …… Rip groove type inner steel sheet pile, 2a …… Rear side 2b …… Lip, 2c …… Opening section 3 ... Hook, 4 ... Long hole 6a ... Reinforcement plate, 6b ... Reinforcement plate 7 ... L-shaped plate, 8 ... Bellows raising member 9 ... Recessed groove, 10a ... Gripping plate 10b ... … Gripping plate, 11 …… Pin hole 12 …… Expanding member, 13 …… Steel sheet pile 14 …… Braising member, 15 …… Expanding member

Claims (1)

[Scope of utility model registration request] 1. An outer steel sheet pile of a lip groove type and an inner steel sheet pile of a lip groove type, wherein the outer steel sheet pile of the lip groove type has a horizontally long slot in a lower portion of a back surface, It has a concave groove reaching the long hole, and has L-shaped plates at the upper and lower parts of the lip, the inner groove steel sheet of the lip groove type has hooks at the upper part of the back surface, and has an L-shaped plate at the lower part of the lip. The lip groove type inner steel sheet pile is disposed inside the lip groove type outer steel sheet pile, and the hook of the lip groove type inner steel sheet pile can slide into the groove of the lip groove type outer steel sheet pile. When the inner steel sheet pile of the lip groove type is lowered relative to the outer steel sheet pile of the lip groove type, the lip groove type inner steel sheet pile of the lip groove type inner steel sheet pile is inserted into the long hole of the lip groove type outer steel sheet pile. Stretchable steel sheet pile, characterized in that the hooks are configured to engage .