JPH0360975B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a propulsion soil for open-cut construction used when burying various pipes or other members in trenches created by excavating the ground using the open-cut construction method. This relates to a fastening device.

[Prior Art] Conventionally, a propulsion retaining device for open-cut construction method used when burying various pipes or other parts in a trench created by excavating the ground using open-cut construction method is disclosed in Japanese Patent Application Laid-Open No. 59-203191. As announced in the official gazette, a pair of earth retaining slide panels that support both side walls of a ditch are slidably supported by a support frame placed between them, and the front part between the pair of slide panels is slidably supported. A propulsion earth retaining device is known that is configured to move the slide panel and support frame forward separately after excavating the ground.

[Problem that the invention seeks to solve]

However, in the case of the conventional propulsion earth retaining device, the earth retaining slide panel must be towed and moved forward while earth pressure is acting on it, so there is a limit to the traction capacity. Yes, that is, the length of the slide panel in the front-rear direction cannot be made very long.

Therefore, the working space between a pair of slide panels is short, so it cannot be used for burying long objects such as long pipes, and it takes a relatively long time to connect objects to be buried such as pipe bodies. If this is required, the time for which the propulsion retaining device is stopped, that is, the waiting time, becomes longer, so there is a problem that the excavation efficiency decreases.

[Purpose and structure of the invention]

The purpose of this invention is to provide a propulsion earth retaining device for open cut construction method which can advantageously solve the above-mentioned problem. An earth retainer that extends in the vertical direction and is open at the rear of each slide panel 1 in a propulsion earth retainer comprising a retaining slide panel 1 and a support frame 2 that slidably supports each slide panel 1. A panel insertion groove 3 is provided, and a large number of retaining panels 6 having a connecting protrusion 4 on one side and a connecting groove 5 on the other side are interconnected on both sides within the groove.
Earth retaining panel rows 7 are constructed, and the front part of each earth retaining panel row 7 is arranged in the earth retaining panel insertion groove 3, and the depth of the earth retaining panel insertion groove 3 is D1.
is set larger than the width D2 of the earth retaining panel 6, and an extensible support member 8 is removably interposed between the left and right earth retaining panel rows 7. be.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

7 and 8 show a retaining panel 6 used in an embodiment of the present invention, which has a connecting protrusion 4 on one side in the width direction and a connecting groove on the other side in the width direction. A plurality of steel panel units 9, 10, 11 having a diameter of 5 are arranged in series in the vertical direction, and a hanging fitting 12 is fixed to the upper end of the uppermost panel unit 9. Vertical engagement grooves 13 arranged in a straight line are provided on both sides of the direction, and a steel joint plate 14 is arranged across the panel units adjacent in the vertical direction, and the bolt 1 inserted through this joint plate 14.
5 is screwed onto the panel unit, and the earth retaining panel 6 is constituted by the panel units 9, 10, and 11 that are connected to each other.

FIGS. 9 and 10 show an extensible steel support member 8 used in an embodiment of the present invention, including a pair of box cross-section beam members 16,
A hydraulic jack 20 for expansion and contraction is interposed between the jack receiving members 18 and 19 which are slidably inserted and fixed inside each beam member 16 and 17, and the hydraulic jack 20 is inserted into the jack receiving member. 18, 19, and the beam members 16, 17 and the hydraulic jack 20 constitute an extensible beam 21, and both ends of the extensible beam 21 are provided with vertical engaging flanges 22 on both sides in the width direction. A vertical support member 23 is fixed by welding, and a stiffener 24 is fixed by welding to both the upper and lower surfaces of both ends of the telescopic beam 21 and the inner surface of the support member 23. The support member 8 is constituted by the fixed support member 23.

FIG. 11 shows an earth retaining panel anchoring member 25 and an anchor rod 2 used in an embodiment of the present invention.
6, the vertical locking member body 27
A vertical connecting protrusion 4 is integrally provided on the front part of the earth retaining panel, and a plurality of insertion holes 28 passing through the locking member body 27 in the left and right direction are provided at intervals in the vertical direction. A locking member 25 is constructed, and an anchor rod 26 is inserted into the insertion hole 28.

1 to 6 show a propulsion earth retaining device for open cut construction according to an embodiment of the present invention, in which a pair of steel earth retaining slide panels 1 support both side walls of a groove 29 in the ground. A steel support frame 2 is arranged between them, and on the inner surface of each slide panel 1, a plurality of guide members 30 made of H-shaped steel extending in the longitudinal direction of the groove (front-back direction) are arranged at intervals in the vertical direction. The guide members 30 are fixed and each guide member 30 is slidably fitted into a support fitting 32 fixed to a vertical frame member 31 of the support frame 2, and further extends in the front-rear direction.
The vertical plate of the steel side frame member 33 having a letter-shaped cross section is arranged so as to overlap the upper outer surface of the slide panel 1, and the horizontal plate of the side frame member 33 is placed on the upper side surface of the support frame 2. installed and secured by bolts or welding.

An upper earth retaining panel 37 is configured by placing earth retaining plates 35 between three or more pillars 34 arranged at intervals in the front-rear direction and fixing them with bolts 36. 37
A mounting bracket 38 is attached to the inner lower part of each support column 34 in the
is fixed by welding, and the upper earth retaining panel 3
7 and the mounting bracket 38 are placed on the horizontal plate of the side frame member 33, and the mounting bracket 38 is attached to the bolt 39.
is fixed to the upper part of the support frame 2.

The slide panel 1 is a front slide panel 1
A and a rear slide panel 1B fixed to the outside of the rear end by welding, and a side plate 40 arranged in parallel at intervals on the inside of the rear slide panel 1B is located at the narrow portion of the guide member 30. The rear slide panel 1B and the side plate 40, which are fixed to the side surface by welding, form a retaining panel insertion groove 3 that extends in the vertical direction and is open at the rear.

On the outside of the rear end of the upper retaining panel 37,
The front end of the rear upper earth retaining plate 41 is fixed by welding, and the rear upper earth retaining plate 41 is arranged on the same plane as the rear slide panel 1B, and a pair of columns 42 are arranged at intervals in the front and rear direction. A mounting bracket 45 is fixed by welding to the inner lower part of each support column 42 in a rear upper inner panel 44 consisting of an upper side plate 43 interposed and fixed therebetween, and the mounting bracket 45 is attached to the side frame member 33. The mounting bracket 45 is fixed to the upper part of the support frame 2 with bolts, and the rear upper inner panel 44 and the side plate 40 are placed on the same plane. A retaining panel insertion groove is also provided between the rear upper retaining plate 41 and the rear upper inner panel 44.

A sled 46 is fixed to the lower part of the support frame 2, and an engaging member 47 for pulling and moving is fixed to the front end of each slide panel 1.

A large number of earth retaining panels 6 configured as described above
are interlocked and connected to each other on both sides (left and right sides) in the groove width direction to form a retaining panel row 7 that supports the groove side walls, and the front part of each retaining panel row 7 is inserted into the retaining panel insertion groove 3. The depth D1 of the earth retaining panel insertion groove 3 is set larger than the width D2 of the earth retaining panel 6.

The rear slide panel 1B and the rear upper earth retaining plate 41 may be pressed by earth pressure and pressed against the outer surface of the earth retaining panel 6, and in this case, the earth retaining panel 6, the rear slide panel 1B, and the rear upper earth retaining plate 41, frictional resistance occurs between the two. In order to reliably prevent the earth retaining panel 6 inserted into the earth retaining panel insertion groove 3 from moving together with the slide panel 1 due to the frictional force when the slide panel 1 is moved forward, A locking member 25 is inserted into the connecting groove 5 at the rear of the fastening panel 6.
The connecting protrusions 4 are inserted and connected, and the anchor rod 26
The locking member 25 is inserted into the insertion hole 28 of the locking member 25 and driven into the ground to fix the locking member 25 so as not to move forward, and the locking member 25 prevents the first earth retaining panel 6 from moving forward. do.

Next, excavate the ground in front between the pair of left and right slide panels 1, move one slide panel 1 forward by one earth retaining panel, and then attach the second earth retaining panel to the first earth retaining panel. Insert the earth retaining panel into the insertion groove 3 while engaging it, then move the other slide panel 1 forward by one earth retaining panel, and then insert the second earth retaining panel into the first earth retaining panel in the same way as in the previous case. It is inserted into the retaining panel insertion groove 3 in the other slide panel 1 while engaging with the retaining panel, and then the support frame 2 is moved forward by one retaining panel.

In this way, the front ground excavation between the pair of left and right slide panels 1, the forward movement of one slide panel and the insertion of the earth retaining panel, the forward movement of the other slide panel and the insertion of the earth retaining panel, and the support frame The forward movement of step 2 is repeated in sequence to move the propulsion retaining device forward.

When moving the slide panel 1 forward, for example, a backhoe used for excavating a trench is engaged with the engaging member 47 at the front end of the slide panel 1 and pulled and moved, and when moving the support frame 2 forward, for example, a backhoe is used to engages with the upper cross beam 49 of the support frame 2 and is pulled and moved.

The support member 23 of the support member 8 is arranged across the earth retaining panels 6 that protrude rearward from the earth retaining panel insertion groove 3 and are adjacent in the front-rear direction, and the hydraulic jack 20 for expansion and contraction of the support member 8 is arranged. The engagement flanges 22 on both sides of the support member 23 are fitted into the engagement grooves 13 of each earth retaining panel 6, and the left and right earth retaining panels 6 are extended by the support member 8.
support the earth pressure acting on the In this way, the supporting members 8 are set between the left and right retaining panels 6 at appropriate intervals, and when the space for joining the buried pipes has been secured, the buried pipes 48 are suspended into the trench and the work for joining the buried pipes is performed. .

As the buried pipe joining work position moves in the excavation direction, backfilling is performed from the rear, and in parallel with this backfilling work, the supporting members 8 and retaining panels 6 of the backfilling portion are successively pulled out and repeated. use. Note that when pulling out the support member 8, the width of the support member 8 is shortened by shortening the hydraulic jack 20 in advance.

When carrying out this invention, the retaining panel 6 may be one that is not divided in the vertical direction, or may have any cross-sectional shape.

The supporting member 8 may have any structure other than that shown in the drawings, and the upper edge of the slide panel 1 may be set higher than the ground surface to support the upper earth retaining panel 37 and the rear upper earth retaining member. The plate 41, the rear upper inner panel 44, etc. may be omitted.

〔Effect of the invention〕

According to this invention, after excavating the ground in front between the pair of earth retaining slide panels 1, the slide panel 1 is moved forward, and then the earth retaining panel 6
While engaging with the existing earth retaining panel, insert it into the earth retaining panel insertion groove 3 at the rear of the slide panel 1, move the support frame 2 between the left and right slide panels 1 forward, and further remove the earth retaining panel. By repeating the process of setting the expandable support member 8 between the left and right earth retaining panels 6 that protrude rearward from the retaining panel insertion groove 3, both side walls of the groove after the propelling earth retaining device is propelled are removed. In addition, the earth retaining panel row 7 consisting of a large number of earth retaining panels 6 can be set without gaps, and the earth retaining panel row 7 can be strongly supported against earth pressure. It is possible to perform joining work on long objects by providing a long work space without increasing the size, and even if joining work takes a long time, by lengthening the work space with the earth retaining panel row 7, it is possible to perform joining work on long objects. Since excavation and propulsion of the earth retaining device can be carried out in parallel, work efficiency can be improved. In addition, since the depth D1 of the earth retaining panel insertion groove 3 is set larger than the width D2 of the earth retaining panel 6, the engagement of the new earth retaining panel with the existing earth retaining panel is not affected by the adverse effects of earth and sand. Since the support member 8 is expandable and retractable, it is easy to attach and detach between the left and right earth retaining panel rows 7. Also, since the support member 8 can be pulled out and reused, economical effects can be obtained.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view of a propulsion earth retaining device for open-cut construction method, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view of Figure 1 is a sectional view taken along the line B-B in Figure 1, Figure 4 is a perspective view of the propulsion retaining device, Figure 5 is a sectional view taken along the line C-C in Figure 4, and Figure 6 is the rear upper inner panel in Figure 4. FIG. 7 is a partially cutaway perspective view of the earth retaining panel; FIG. 8 is a sectional view taken along line D-D in FIG. 7; FIG. 9 is a perspective view of the support member; The figure is a longitudinal sectional front view showing a part of the support member, and FIG. 11 is a perspective view showing the locking member and the anchor rod. In the figure, 1 is a slide panel for retaining the earth, 2
is a support frame, 3 is a retaining panel insertion groove, 4 is a connecting protrusion, 5 is a connecting groove, 6 is a retaining panel, 7 is a retaining panel row, 8 is a supporting member, 13 is an engagement groove, 20 is an expansion/contraction 21 is a telescopic beam, 22 is an engagement flange, 23 is a support member, 25 is a retaining panel locking member, 26 is an anchor rod, 29 is a groove, 30
32 is a guide member, 32 is a supporting metal fitting, 37 is the earth retaining panel, 40 is a side plate, 41 is a rear upper earth retaining plate, 44 is a rear upper inner panel, and 48 is a buried pipe.

Claims (1)

[Claims] 1. In a propulsion earth retaining device consisting of a pair of earth retaining slide panels 1 that support both side walls of a groove and a support frame 2 that slidably supports each slide panel 1, there is a A retaining panel insertion groove 3 that is extended and open at the rear is provided, and a large number of retaining panels 6 having connecting protrusions 4 on one side and connecting grooves 5 on the other side are installed on both sides of the groove. interconnected in the
Earth retaining panel rows 7 are constructed, and the front part of each earth retaining panel row 7 is arranged in the earth retaining panel insertion groove 3, and the depth of the earth retaining panel insertion groove 3 is D1.
is set larger than the width D2 of the earth retaining panel 6, and an expandable support member 8 is removably interposed between the left and right earth retaining panel rows 7.