JPH0341611B2 - - Google Patents

Abstract

The device for staying the walls of an excavation comprises armour plates with large plane surfaces (2, 3) of which the edges of each side are guided and supported by guiding grooves (5, 5') arranged on the stays (1). The stays are arranged by pairs facing each other and held in that position by struts (10). To decrease the resistance to friction between the plates (2, 3) and the stays (1) there are provided rollers (8, 11, 16) having horizontal axis. Each side of the guiding grooves (5, 5') of the stays which is farther from the wall of the excavation is provided with an array of rollers (8, 11, 16) mounted on the stays (1).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support device for supporting the wall surface of an excavation trench with a plate having a large area. In particular, the present invention provides that the side edges of the plate follow and are supported by guide grooves on both sides of the support member, and the support members are arranged in pairs facing each other and spaced apart by transverse support members. The present invention relates to a wall support device for an excavated trench, which is held in place and is further provided with a plurality of rollers rotating about a horizontal axis in order to reduce frictional resistance between the plate and the support member.

[Problems with the prior art] In support devices of this type, as seen in German Patent Publication no.
The head is held on a support structure and is vertically movable. The guide head has an axis perpendicular to the support structure and rollers.

In such conventional support devices, the rollers on the plate are not covered or protected in any direction when removed from the support structure.
Therefore, there is a risk of damage to the plate during transport and when installing the plate on the support structure. Moreover, the possibility of such damage occurring is high. This is because field conditions are generally rough and untidy, and it is beyond the capacity of ordinary, less-skilled workers to take care not to damage the rollers exposed from the edge of the plate. It is from. Also, in order to reduce the weight of the plate, this type of plate is made from a metal plate of 2 to 3 mm, so it is impossible to securely hold the rollers on the support plate.

[Object of the invention] The object of the present invention is that in the wall support device for an excavation trench, the roller between the support plate and its guide is moved also in a messy field situation for forming an excavation trench in the ground. To provide a wall support device that can sufficiently perform its function even if it is used for several weeks or months without checking whether it is in contact with the ground or corrosive water in an excavated trench. There is a particular thing.

A further object of the invention is to avoid damage during transport.

A further object of the invention is to make the construction of the rollers as simple and robust as possible.

[Configuration and Effects of the Invention] The object of the present invention is to provide support members that are arranged in pairs on both sides of an excavation trench and held apart by a transverse support member, and a wide surface that supports the excavation trench. a support plate that supports the wall surface of the groove, the side edges of the support plate are guided and supported by guide grooves provided on both sides of each support member, and the side edges of the support plate are guided and supported by guide grooves provided on both sides of each support member; In a wall support device in which a plurality of rollers for reducing frictional resistance are rotatably arranged around a horizontal axis, a side surface of the guide groove facing the wall surface of the excavation groove is attached to each of the support members in a line. This is achieved by an excavated trench wall support device characterized in that it is formed of rollers that are rotatably held by holding means.

The advantage obtained by this first invention is that, unlike a device in which the rollers are supported on a support plate, there is no damage to the rollers during conveyance. This is because the rollers are held within the cross-section that constitutes the support structure. Furthermore, the wall thickness of the support structure is much greater than the wall thickness of the plate, so that the rollers are firmly supported even in messy field conditions. Furthermore, since the rollers are only slightly exposed from the sides of the guide, there is no damage to the rollers when pushing the plate into the guide.

In an embodiment of the invention, a guide member is arranged between the rollers to protect the rollers, and the rollers extend beyond the guide member by 5 to 30 mm, preferably
It protrudes by about 10-20mm. A guide member is also arranged above this plate in order to protect it when the upper roller is exposed to danger when guiding the plate into the guide groove of an adjacent support member. This guide element together with the support wall forms an upper connection. This support wall constitutes a side wall adjacent to the wall of the guide groove.

In order to make it easier to guide the plate into the guide groove, this connection preferably has an enlarged funnel-like shape.

The rollers pivoted to the support structure can be provided with flanges that engage longitudinal guide heads at the side edges of the plate. This guide head is arranged perpendicular to the plane of the plate.

According to the invention, therefore, it is not necessary to arrange the rollers on an axis perpendicular to the plate plane for the transmission of mechanical forces, as is the case with the device described in German Patent No. 23 23 321.

In another embodiment of the invention, the rollers roll longitudinally as rolling elements, confined within a longitudinal roller guide between the roller path, the roller guide and the plate. This has significant advantages in underground structures in that the support member has greater resistance to debris, corrosion and wear. A favorable configuration is thus obtained in which the rollers acting as rolling elements have shaft ends that roll on the roller path of the roller guide.

In another embodiment of the present invention, the support member includes an outer guide groove and parallel to the outer guide groove.
and an outer base wall is provided to form an inwardly disposed inner guide groove, and two side walls are provided at right angles to the base wall, and at least two side walls are provided at right angles to the base wall. Support rollers are arranged in parallel rows. The outer guide groove is constituted by the protrusion of the base wall and the first row of support rollers.

The inner guide groove is constituted by a second row of support rollers and a parallel row of guide rollers arranged at a distance therefrom. The outer side of the support plate contacts these guide rollers, but the function of the guide rollers, which are not subjected to any large load, can be replaced by the support rollers in the outer guide groove. Further, guide members such as bolts and flanges can also serve as a guide roller. However, the support roller and the guide roller can be constructed identically. Since the guide roller and the support roller can be easily fixed to the support member in a replaceable manner, it is suitable for the inner guide groove to consist only of the guide roller and the support roller.

Due to the design of the inner guide groove, it is also expedient to arrange these rollers only in the area of the lower half of the support member. This has the advantage that the support plate does not have to be lifted over the support member in order to introduce it into the inner guide groove.

It is desirable to place a strip approximately 1 to 2 cm thick near the inner edge of the base wall. This strip cooperates with the strips of the corresponding support plate, and these strips have a greater play than the support plate, so that in the longitudinal direction of the excavation groove, via the support plate introduced into the outer guide groove, A reliable connection of the supporting members along the line can be obtained.

It is also an object of the present invention to support the wall surface of the excavation groove by a pair of support members arranged facing each other on both sides of the excavation groove and held apart by a transverse support member, and a wide surface. a support plate, the side edges of the support plate are guided and supported by guide grooves provided on both sides of each support member, and a plurality of grooves are provided to reduce frictional resistance between the support plate and the support member. In a wall support device in which rollers are rotatably arranged around a horizontal axis, a side surface of the guide groove facing the wall surface of the excavation groove is formed by rollers attached to each of the support members in a line. and these rollers are rotatably held by holding means, and each of the support members has a support hole, and the rollers are pulled from the support hole by a tension means disposed along the longitudinal direction of the excavated groove. This is achieved by an excavation trench wall support device characterized in that the support members are connected to each other and a predetermined distance corresponding to the width of the support plate disposed between adjacent support members is maintained.

In this second invention, the mechanical force is transmitted along the longitudinal direction of the excavated groove between the support member and the support plate by the engagement between the guide head of the support plate and the guide portion of the support member. rather than by means of a tension member. This reduces problems such as the support plate getting caught in the support member when the support plate is introduced or pulled out.

[Examples] Examples of the present invention will be described below with reference to the drawings.

The support device according to the first embodiment shown in FIGS. 1 to 3 has a support member 1, and a support plate 2 made of steel,
3 is movably guided. In the longitudinal direction of the excavated groove, the support member 1 and the support plate 2,
3 are connected by a longitudinal guide member 4 and a strip plate 6 connected thereto. As shown in FIG. 2, the guide members 4 are arranged one above the other at a distance 7 in the vertical direction. These distances 7 constitute a cavity in which a roller 8 is rotatably supported on the axle bolt. Support members 1 arranged opposite to each other in the excavated groove
In particular, the transverse support member 10 consists of an expansion member.
They are supported in opposite directions against the pressure of the ground.

As shown in FIG. 3, the upper support plate 2 is guided in a guide groove 5 located near the wall of the excavation trench, or the lower support plate 3 is guided in a guide groove 5 located in the center of the excavation trench.

In the case of the second embodiment shown in FIGS. 4 to 6, the roller 11 is provided with a flange 12. This flange 12 engages with the guide head 13 of the support plates 2, 3 and functions similarly to the strip 6 shown in FIGS. 1 to 3. Flange 12
The roller 11 with
Since it is also subjected to loads in the axial direction, it must be supported accordingly. FIG. 7 shows a corresponding bearing. Here, a pair of high-shoulder ball bearings 14 are arranged to face each other. This bearing is prevented from entering the inside of the bearing by an O-ring seal 15.

A third embodiment of the invention is shown in FIGS. 8-10. A roller 16, which is designed as a rolling element, is arranged between the guide head 13 of the support plate 2 and the guide element 4 of the support element. The rollers 16 are arranged at a distance 18 and are carried by the support plate 2 according to the arrows 19,
The ground pressure in the direction 20 is transmitted via the roller 16 and its shaft end 21 to the running surface of a longitudinal roller guide 17 connected to the guide member 4 .

FIG. 9 shows the upper roller 16 in its rolling position above the running surface 22. In FIG. On the other hand, the lower 2
Two rollers 16 are shown in their lower rolling position. The shaft end 21 rolls on the running surface 22 between these rolling positions. In this embodiment, the shaft end 21 rolls 360 degrees, and the circumferential surface of the roller 16 also rolls in the same way. The distance traveled between the support plate 2 and the support member 1 is equal in either direction to the sum of the circumference of the shaft end and the circumference of the roller. In the upper or lower end position, the shaft end 21 reaches a stop 23, which abuts the shaft end 21 on a semicircular section forming a support surface.

FIG. 10 shows a support member 1 with two guide grooves parallel to each other on each side of the support member. Inside, it is supported by rollers 16 as rolling elements.

FIG. 11 shows an excavated trench wall support device according to the second invention. In this support device, the support members 1, 1', 1'' have a double T-shaped cross section, and the tension rods 30 or tension ropes 3
1 along the longitudinal direction. Tension rod 30 has a turnbuckle 32. The tension rope 31 is suspended on the support member 1 in the support hole 34 by means of a shackle 33 . Each support member 1, 1', 1'' is held at a constant distance via a tension rod 30 and a tension rope 31, so that the support plate 2,
3, 2', 3', 2'', 3'' do not require a guide head. Here, support plates 2, 3,
2', 3', 2'', 3'' and support members 1, 1',
1'' is only in the direction perpendicular to the longitudinal direction of the support device via the rollers 8, 8'8''. Between the rollers stacked on top of each other, there is a first
A guide member 4 is arranged as in the embodiment shown in FIGS.

Steel support plates 2, 3, 2', 3',
2'' and 3'' are made of thin plates having a wall thickness of 2 to 3 mm and formed by welding into a U-shaped or O-shaped cross section (not shown). a support plate 2 that abuts against rollers 8, 8', 8'' of support members 1, 1', 1'';
3, 2', 3', 2'', 3'' side edges are at least 5
It is expedient to consist of a steel plate with a wall thickness of mm, or to have steel rails fixed to the side edges, which run on rollers.

The fourth aspect of the present invention shown in FIGS. 12 to 14
In the embodiment, the support member 1 includes one base wall 35
and side walls 36, 37 arranged at right angles thereto and spaced apart from each other. Thick portions 38 are provided at the edges of the side walls 36, 37, and the thick portions 38 are slightly bent outward. The space between both side walls 36, 37 is therefore limited to the width of the transverse support member 1.
0 connection.

After forming openings in the side walls 36, 37 to support the rollers 8, a tubular member 39 is attached to the side walls 36, 37. The ends of the tubular member are connected to the side walls 36, 37 at the outer surfaces of the side walls 36, 37.
Welded to 37. The shaft bolt 9 is installed through this tubular member 39, and the shaft bolt's tubular member 3
A tubular roller 8 is supported at the end protruding from 9. This roller is held by a Segel-shaped safety ring 40. This ring is held in a slot formed in the end of the axial bolt 9.

The support member 1 has two parallel guide grooves 5 on each side. The outer guide groove 5, that is, the guide groove for mounting the upper support plate 2, is formed by the base wall 35 and the rollers 8, and the rollers 8 are attached to the support member 1 at a distance of 50 cm or 80 cm from each other. . A first strip 41 is provided at the edge of the base wall 35 in order to fixedly connect the support member 1 arranged on the wall of the excavation groove in the ground via the support plate 2 in the longitudinal direction of the excavation groove. is welded. This strip 4
1 is constructed with a height of 10 cm and a width of 20 cm. A second strip 42 facing the first strip 41 is welded to the outside of the guide edge 43 of the support plate 2 . The play of the guide edges 43 of the support plates 2 and 3 between the base wall 35 of the support member 1 and the support roller 8 is as follows:
It is approximately 5mm. Therefore, the support plate 2 can be easily introduced into the outer guide groove 5. The introduction of such plates is further facilitated by the following. That is, the guide member 4 provided with the introduction slope 44 is arranged above the uppermost roller 8, and the guide groove 5 is expanded into a funnel shape at the upper end of the support member 1.

The inner guide groove 5' is formed by a second row of support rollers 8 and a row of guide rollers 28. The support plate 3 guided in the inner guide groove 5' is constructed identically to the support plate 2 guided in the outer guide groove 5.

The second strip 42 contacts the guide roller 28 when introduced into the inner guide groove 5 . The ground pressure is carried by support rollers 8. guide·
The roller 28 and its axle bolt are constructed identically to the support roller 8 and its axle bolt 9, and
Similarly, it is attached to the support member 1 in an easily replaceable manner. The row of guide rollers 28 is slightly displaced inwardly with respect to the row of support rollers 8 in the outer guide groove 5, so that the upper outer support plate 2 and the lower inner support plate 3 is such that the deflection of the upper outer support plate 2 due to ground pressure does not interfere.

The thickness of the support plates 2, 3 and their guide edges 43 and the diameter of the roller 8 are determined by the guide roller 28.
The size is set such that the operation of the support roller 8 of the outer guide groove 5 is taken over.

Furthermore, it is desirable that the inner guide groove 5' be provided from the lower end of the support member 1 to approximately the upper half of the support member 1. Thereby, the support roller 8 and the guide roller 28 for the inner guide groove 5' can be dispensed with in the upper part of the support member.

As shown in FIGS. 12 and 14, the upper end of the support member 1 is covered with a welded cover 45. As shown in FIGS. This cover 45 and the welded tubular member 39 reinforce the support member 1. Optionally, further lateral walls can also be provided. That is, the wall connects the side walls 36, 37 to each other at both free ends thereof. As shown in FIG. 13, the strips 42, 43 are thicker than the maximum possible play of the support plate 2 in the guide groove 5. As shown in FIG. Therefore, a fixed connection of the support member 1 can be achieved along the longitudinal direction of the excavated groove via the support plate 2 introduced into the outer guide groove 5.
Correspondingly, there is no need for a connection via the support plate 3 to be introduced into the inner guide groove 5'. Such a configuration has the following advantages. That is, the support member 1 is not provided with any unnecessary parts that would prevent the support plates 2, 3 from being introduced into the guide grooves 5, 5' of the support member.

[Brief explanation of the drawing]

FIG. 1 is a side view of a support member of a support device according to a first embodiment of the present invention, FIG. 2 is a front view of the same support member, and FIG. 3 is a cross-sectional view of one support member and a first FIG. 4 is a side view of a support member in which the support roller is provided with a flange according to the second embodiment of the present invention, and FIG. , a front view of the support member in FIG. 4, and FIG.
A sectional view of the support member along the line - in FIG. 4,
FIG. 7 is a sectional view of a roller having a flange, and FIG. 8 is a sectional view of a roller according to a third embodiment of the present invention.
9 is a partial view of the roller guide that acts as a rolling element; FIG. 10 is a sectional view of a support member having a roller that acts as a rolling element; FIG. FIG. 11 is a sectional view of three support members connected to each other via a tension rope or tension rod according to the second invention, FIG.
13 is a sectional view of the support member shown in FIG. 12, and FIG. 14 is a side view showing the upper part of the support member according to the fourth embodiment of the present invention.
FIG. 3 is a top view of the support member shown in the figure. 1...Support member, 2, 3...Support plate, 4
...Guide member, 5, 5'...Guide groove, 8, 11,
16... Roller, 9... Shaft bolt (shaft), 10... Transverse support member, 12... Flange, 13... Guide
Head, 17...Roller guide, 21...Shaft end,
22... Running surface, 28... Guide roller, 30... Tension rod (tension means), 31... Tension rope (tension means), 34... Support hole, 35... Base wall, 3
6, 37...Side wall, 39...Tubular member, 40...Segel type safety ring (holding means), 41...First strip plate,
43...Guide edge, 44...Introduction slope.

Claims (1)

[Scope of Claims] 1. Support members arranged in pairs on both sides of the excavation groove and held apart by transverse support members, and supports that support the wall surface of the excavation groove with their wide surfaces. a plate, the side edges of the support plate are guided and supported by guide grooves provided on both sides of each support member, and a plurality of grooves are provided to reduce frictional resistance between the support plate and the support member. In a wall support device in which rollers are rotatably arranged around a horizontal axis, a side surface of the guide groove that faces the wall surface of the excavated groove is formed by rollers attached to each of the support members in a line. An excavated trench wall support device, characterized in that these rollers are rotatably held by holding means. 2. The support member has a guide member provided between the rollers, and the distance from which the rollers protrude from the surface of the guide member is set to 5 to 30 mm. Excavation trench wall support device. 3. Excavation trench wall support according to claim 1 or 2, wherein the roller has a flange, and the flange engages with a guide head provided on a side edge of the support plate. Device. 4. The support member has a vertical roller guide, and the roller is held between a running surface of the roller guide and the support plate and guided so as to be rotationally movable in the vertical direction. Laura is
3. The wall support device for an excavated trench according to claim 1, wherein the device has shaft end portions on both sides, and the shaft end portions are supported on the running surface of the roller guide. 5. The support member is welded to one base wall, two side walls arranged at right angles to the base wall and spaced apart from each other, and inserted into holes provided in these side walls in alignment with each other. 2. The wall support device for an excavated trench according to claim 1, comprising a tubular member, and the shaft of the roller is replaceably mounted on the tubular member. 6. The roller is formed by a tube that slides on the shaft, and is held by a Seegel type safety ring as the holding means, and this safety ring is installed in a narrow groove provided at the end of the shaft. The wall support device for an excavated trench according to claim 5. 7. The support plate has a guide edge, and a strip plate with a height of 10 to 15 mm is welded to the inside of the base wall of the support member and the outside of the support plate, respectively. The support device described in. 8. A guide edge of the support plate is approximately half as thick as the support plate, and is formed of a steel plate welded along a side edge of the support plate. The excavated trench wall support device according to item 7. 9. The side wall of the support member is provided with two guide grooves for mounting the support plate, and the inner guide groove is constituted by the support roller and the guide roller, which are the rollers. The wall support device for an excavated trench according to any one of claims 5 to 8. 10. A side wall of the support member, at a portion above the uppermost roller among the rollers, is provided with an introduction slope that expands the guide groove upward into a funnel shape. Item 9. The excavated trench wall support device according to item 9. 11 A support member is provided in pairs on both sides of the excavation groove and held apart by a transverse support member, and a support plate that supports the wall surface of the excavation groove with a wide surface, The side edges of the support plate are guided and supported by guide grooves provided on both sides of each support member, and a plurality of rollers that reduce frictional resistance between the support plate and the support member are rolled around a horizontal axis. In the wall support device rotatably disposed in the guide groove, a side surface of the guide groove that faces the wall surface of the excavated groove is formed by rollers attached to each of the support members in a line, and these rollers are Each of the support members has a support hole, and the support members are connected to each other by a tensioning means disposed from the support hole along the longitudinal direction of the excavated groove. . A wall support device for an excavated trench, characterized in that a predetermined distance corresponding to the width of a support plate disposed between adjacent support members is maintained.