JPH0256445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavation propulsion method for various types of pipe burying work.

Conventionally, when burying water pipes or gas pipes, steel sheet piles were driven opposite each other, and a groove was created by excavating between the sheet piles before the piping was installed.

However, in order to counteract the earth pressure in the trench, steel pipe sheet piles must be placed in advance across the entire trench.
Furthermore, these steel pipe sheet piles must be removed after the burying work is completed, making the work inefficient.

Furthermore, when driving the sheet piles, noise and vibrations are generated, creating a pollution problem.

In order to improve this point, a mechanical earth retaining device that moves forward using hydraulic pressure has been developed, but this device is large and expensive and is not suitable for simple construction work.

The present invention was made in order to solve the above problems, and an object of the present invention is to provide a cut-and-cover propulsion method that has a simple structure and excellent workability.

That is, in the present invention, slide panels made of flat plates are opposed to each other, the slide panels are slidably supported by a support frame, and each slide panel and support frame are separately drawn forward in the direction of movement.
This relates to an excavation propulsion method that is characterized by excavating between both slide panels.

Next, an embodiment of the present invention will be described, but first, an apparatus used in the present invention will be described.

[B] Overall configuration of the device As shown in FIG. 1, the excavation device is constructed by slidably supporting two slide panels 1 on both sides of a support frame 2.

[B] Slide Panel The slide panel 1 is a reinforced flat plate, and is a plate body for the purpose of protecting the wall surface of the cut groove.

This slide panel 1 is used by facing each other.

A hook 12 for pulling the slide panel 1 in the excavation direction is provided at the upper edge of the face side edge 11 of the slide panel 1.

Slide panel 1 is on the inside of slide panel 1.
A guide rail 3 having a C-shaped cross section is installed in the longitudinal direction, that is, in the horizontal direction.

The guide rails 3 may be arranged continuously in the longitudinal direction of the slide panel 1, but as shown in FIG. do.

Therefore, the maximum distance that the slide panel 1 can move forward by pulling it once is determined by the total length of the guide rail 3.

[C] Support Frame The support frame 2 is a beam or frame for the purpose of slidably supporting the slide panel 1 on which earth pressure acts. The support frame 2 only needs to be slidably connected to the panel 1 on one side or both sides, and various known methods can be used.

For example, the support frame 2 has a spherical body 23 with a low frictional resistance attached to one end, and the panel 1 is attached to the other end.
It is possible to adopt a configuration in which the spherical body 23 is fixed to the spherical body 23 or a configuration in which the spherical body 23 is attached to both ends.

Further, the mounting interval position of the support frame 2 is determined in consideration of the installation interval position of the support frame 2 so that the buried object 5 such as a humid pipe can be hung from between the support frame 2 which communicates between the front part and the rear part between the slide panels 1.

Next, how to use it will be explained.

[B] Assembling the device The separated slide panel 1 and support frame 2 are transported and assembled on site.

To assemble the device, slide the support frame 2 into the slide panel 1.
Since it is a simple task that requires only a few minutes of communication, it can be completed in a short period of time.

[B] Excavation Excavate a groove of a specified width in the ground with a shovel, etc.
The frame device described above is placed and then extended forward to advance the excavation.

The slide panel 1 placed in the trench receives earth pressure on its side, is supported by the support frame 2, and prevents the excavated surface from collapsing.

[C] Pull the panel Next, pull the hook 12 of the slide panel 1 one by one.
Then, a wire is hung on the hook of the support frame 2 to pull it forward and propel it.

Each slide panel 1 is moved forward by repeatedly pushing and digging until it reaches the full length of the buried object 5.

At this time, since the support frame 2 is placed between both panels, a groove with accurate dimensions is cut.

The pulling force can be applied not only by an excavator but also by means such as a winch.

[d] Piping, backfilling After preparing the bottom of the groove between the slide panels 1, the buried objects 5 are suspended and laid.

After laying the buried object 5, it is backfilled with sand or other aggregate.

The above excavation, pulling panel 1 on one side at a time,
The buried object 5 is laid by repeating the operations of pulling the support frame, piping and backfilling.

[E] Other Embodiments 1 It is also conceivable to use a square or rectangular frame as shown in FIG. 6 as the support frame 6 to slidably connect between the slide panels 1.

That is, the same spherical body 2 as in the above embodiment is placed on the outside of the slide frame 6 facing the inner surface of the slide panel 1.
3 is provided, and this spherical body 23 is engaged with the guide rail 3 to support the slide panels 1 in a slidable manner.

[F] Other Embodiment 2 It is also possible to configure the support frame that supports the slide panels 1 to be extendable and retractable so that it can appropriately follow the width of the groove to be cut.

Furthermore, each panel 1 can be divided into two parts, upper and lower, and separately pulled out forward by an excavator.

In addition, as shown in Figure 7, if two screws 7 are installed on the underside of the panel 1 that allow vertical jacks 6 to move in and out, it will be easier to handle when the tip goes down or up as the excavation progresses. can be addressed and corrected.

Since the present invention is as explained above, the following effects can be expected.

<A> Unlike the conventional method, there is no need to place and pull out a large number of steel pipe sheet piles, and only two slide panels are advanced alternately in accordance with the excavation.

Therefore, the construction period can be shortened.

<B> Also, since excavation, propulsion, piping, and backfilling are repeated, backfilling can be done in parallel during excavation.

Therefore, work can proceed efficiently.

<C> Since both slide panels are configured to be slidable via the support frame, when one slide panel is propelled, it is not affected by the frictional resistance acting on the other slide panel.

Therefore, compared to a device that propels both slide panels at the same time, the propulsion force is smaller, and a small-capacity excavation machine can be used to excavate and pull the panels together.

<D> Since the slide panel and support frame can be constructed by assembling separate parts on site, transportation and storage are extremely easy.

<E> Also, compared to a panel and support frame that are integrated, it can be easily changed and adjusted according to the depth and dimensions of the site.

<F> It can be used not only for burying pipes, etc., but also for placing cast-in-place concrete in excavated trenches and for various other construction works.

<G> Since steel pipe sheet piles are not used, there is no need for special machines for driving and pulling out, and noise and vibration pollution can be kept to a minimum.

[Brief explanation of drawings]

Fig. 1: An explanatory diagram of one embodiment of the device according to the present invention, Figs. 2 to 5: An explanatory diagram of the construction state, Nos. 6 and 7
Figure: Explanatory diagram of other embodiments. 1...Slide panel, 2...Support frame, 3...
guide rail.

Claims (1)

[Scope of Claims] 1. Slide panels made of flat plates are opposed to each other, the slide panels are slidably supported by a support frame, each slide panel and the support frame are separately drawn forward in the direction of movement, and both slides are moved. A cut-and-cover construction method that is characterized by excavating between panels.