JP3500447B2 - Retaining panel support structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth retaining panel which is set up along a groove wall when a groove for burying a pipe for city gas, water and sewage, etc. is opened from inside of the earth retaining panel with a support jack like a beam. Belongs to the technical field of structure supported by.

[0002]

2. Description of the Related Art Various supporting structures for earth retaining panels are known. For example, in Japanese Patent No. 2510832, there is a soil retaining device that supports the other end of a connector having one end connected to a pillar (guide rail) of an earth retaining panel by connecting the other end to a cut beam (spindle) end with a cotter. It is disclosed. Real fair 6-
Japanese Laid-Open Patent Publication No. 26580 discloses a support structure in which a pillar of an earth retaining panel and a connector of a support jack are connected and supported by pins. Japanese Patent Publication No. 59-1849 discloses an earth retaining device in which a support rod of an earth retaining panel and an end portion of a support jack are brought into contact with each other via an elastic member and are connected by a pin to support them.

[0003]

Each of the known supporting structures described above has at least one of them during the assembling work.
Only one person supports the support jack, and at least one other person assembles the work by connecting the pins or cotters to each other to assemble the work, and the one-person work is impossible and troublesome.

Also, for example, the above-mentioned Japanese Patent No. 251083.
The earth retaining panel support structure described in Japanese Patent No. 2 has a parallel structure as a method of pushing the guide rail deeper in an operating state in which earth pressure is supported by a cutting beam (spindle) connected to the guide rail via a connecting tool. A method is generally practiced in which the guide rails that are facing each other are alternately pushed in one by one, but in this case, the guide rails and the girders have a relationship of inclining with a coupling tool as an intermediary. Therefore, it was pointed out that the surrounding part of the hole where the connecting tool was hooked was locally twisted by an excessive external force, and that part was deformed or damaged to a greater or lesser degree, which hinders the next use. There is.

Therefore, it is an object of the present invention that even one worker can easily assemble the supporting structure, and that the earth retaining panel is directly supported to eliminate the need for the support column and the support jack. An object of the present invention is to provide a support structure for a soil retaining panel that does not cause excessive external force or twisting at the portion connecting the soil retaining panel and the soil retaining panel, and thus does not cause deformation or damage.

[0006]

As a means for solving the above-mentioned problems, a support structure for an earth retaining panel according to the invention of claim 1 supports an earth retaining panel of a groove to be cut into the ground from the inside thereof. The structure is supported by a jack,
Grooves that open inward are formed in the vertical direction on the vertical rail of the earth retaining panel, and a jack receiving plate having a notch that is open upward is fixed to the jack mounting position of the vertical rail. Is provided with a jack fixing metal fitting having a neck portion that fits in the notch of the jack receiving plate and a size that fits in the groove of the vertical rail at one end of the support shaft member that is configured to be expandable and contractible. The other end is provided with a support connector which is attachable / detachable by inserting / removing the connecting pin, and the support connector has a neck portion which is accommodated in the notch of the jack receiving plate at the tip end thereof, It is characterized by having a jack fixing metal fitting that fits in the groove.

According to a second aspect of the present invention, the jack fixing metal member according to the first aspect is formed in a tubular shape having a shaft hole penetrating in a direction perpendicular to a neck portion thereof, and at an end portion inside the neck portion. There is a cushioning rubber that comes into contact with the vertical rail, and the jack fixing metal fitting with the neck part housed in the notch has a positioning axis that penetrates the shaft hole from the vertical rail side of the earth retaining panel and is vertically attached to the vertical rail. It is characterized in that it can be tilted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The earth retaining panel support structure according to the first aspect of the present invention, as shown in the overall view of FIG. It is preferably implemented as a structure in which the two are erected in parallel so as to face each other at equal intervals, and are supported by a support jack 2 from inside thereof like a truss (see also FIG. 2). In short, the structure does not use columns (guide rails).

In the case of the present invention, the earth retaining panel 1 is provided with vertical bars 3 at the center and both ends of its inner side surface to enhance the rigidity of the panel and to eliminate the use of columns. And
Grooves 4 that open inward are formed in the vertical bars 3 at both end positions over the entire length in the vertical direction. As is clear from FIG. 5, the vertical bars 3 at both ends are formed by fixing grooved steels having a size of about 100 × 50 mm in parallel with each other with a gap of about 60 mm, and the gaps are flat grooves 4 It is configured as. Therefore, it is easy to clean the groove 4 after use by removing mud.

At a jack mounting position in the groove 4 of the vertical rail 3, a jack receiving plate 5 having a U-shaped notch 5a opened upward is firmly fixed to the groove opening by welding. This jack receiving plate 5 has a thickness of 6
A flat steel plate having a size of about mm is machined, and the notch 5a has an opening width of 45 mm and a maximum depth of about 100 mm. As is apparent from FIGS. 5 and 6, the jack receiving plate 5 is fixed in such a manner that the notch 5a forms an edge 5b having a width equal to the left and right with respect to the opening width of the groove 4 of the vertical rail 3. . According to the above dimensional specifications, the width of the edge 5b is 7.
The size is 5 mm each.

Next, the support jack 2 shown in detail in FIGS. 2 to 4 is a screw type jack consisting of two support shaft members 2a and 2b which are screwed so as to be able to expand and contract in relation to the outer pipe and the inner pipe. The manual handle 2c is rotated to extend and retract. As is apparent from FIG. 4, a male screw is formed on the entire outer peripheral surface of the support shaft member 2b which is the inner pipe, and a screw sleeve 2d rotatably attached to the inner end of the outer pipe 2a is screwed into the male screw. Has been. And the screw sleeve 2d
The manual handle 2c is attached to the. The screws are square screws that are strong against load. Of course, the type of the support jack 2 is not limited to the screw type, but a hydraulic type jack utilizing hydraulic pressure or pneumatic pressure or other jack mechanism can be appropriately adopted for implementation.

A connector 6 is directly welded and fixed to the outer end (left end) of one of the support shaft members 2a, a flange 6a is formed at the tip of the connector 6, and a cushioning rubber for hitting the vertical rail 3 is provided on the front surface thereof. A plate 7 is attached. Further, the shaft portion 8a of the jack fixing metal fitting 8 is tightly fitted in the mounting hole 10 provided in the axial direction of the central portion from the tip end side of the connector 6, and the cotter 9 is inserted in the diametrical direction to integrally connect the two. Has been done. The jack fixing member 8 is formed in a cylindrical shape in a direction perpendicular to the shaft portion 8a and further to the axis of the support jack 2, and has a hole 8c for the shaft penetrating therethrough and is like a hammer head. It is said that. The jack fixing member 8 is formed to have a cylindrical length (a length of about 58 mm) that can be accommodated in the groove 4 of the vertical bar 3. A neck portion 8b, which is a root of the shaft portion 10, is formed to have a thickness (diameter of about 30 mm) that can be accommodated in the notch 5a of the jack receiving plate 5.

Therefore, when the jack fixing member 8 is horizontally laid down and is inserted into the groove 4 of the vertical bar 3 and the neck portion 5b is further accommodated in the notch 5a of the jack receiving plate 5, the jack fixing member is fixed. The metal fitting 8 is in a state in which both end surfaces thereof are tightly restrained by the groove walls, and is in a mounting state in which the metal fitting 8 hits the edge 5b of the notch 5a of the jack receiving plate 5 and is never pulled out to the front side. This mounting state is completed by passing the positioning shaft 11 through the web of the left and right vertical rails 3 through the shaft hole 8c of the jack fixing metal fitting 8 as well. As a result, the jack fixing member 8 is prevented from jumping and coming off and the positioning shaft 11
The jack fixing member 8 is supported by the vertical crosspiece 3 so that the jack fixing member 8 can be tilted in the vertical direction (pivotally pivoted). Therefore, in the work of pushing the earth retaining panels 1 and 1 which face each other in parallel in a deeper state while being supported by the support jacks 2 in the operating state, even when only one of the earth retaining panels 1 is pushed in advance, the jack fixing bracket 8 Freely tilts and follows the positioning shaft 11 and does not cause excessive external force twisting or the like in its peripheral portion. As a condition for freely tilting in this manner, it is convenient to stop the neck 8b of the jack fixing member 8 with the positioning shaft 11 at a position where the neck 8b thereof is appropriately raised above the bottom of the notch 5a. These are matters common to the support connector on the opposite side and its jack fixing metal fitting, which will be described below. The positioning shaft 11 has a head 11a having a large diameter, and has a structure in which a stop pin 15 is inserted on the tip side.

The other support shaft member 2b of the support jack 2
A short columnar connecting terminal 12 is integrally attached to the outer end of the connecting terminal 12 by means such as welding.
A support connector 16 is provided that can be attached and detached by inserting and removing the connecting pin 13. The support connector 16
Also, similarly to the connector 6 on the opposite side, a flange 16a is formed at the tip portion, and a cushioning rubber plate 7 which is in contact with the vertical rail 3 is attached to the front surface thereof. Further, the shaft portion 8a of the jack fixing metal fitting 8 is tightly fitted into the mounting hole 10 provided in the axial direction of the center portion from the tip end side of the support connector 16, and the cotter 9 is diametrically inserted to integrally connect the two. Is being done. The jack fixing member 8 is also formed in a cylindrical shape in a direction perpendicular to the shaft portion 8a and further to the axis of the support jack 2, and has a shaft hole 8c penetrating therethrough. The length of the cylindrical shape is the vertical bar 3
It is formed to have a length (about 58 mm) that can be accommodated in the groove 4. Further, the neck portion 8b, which is the base of the shaft portion 8a, is formed to have a thickness that can be accommodated in the notch 5a of the jack receiving plate 5.

The support connector 16 is characterized in that a mounting hole 17 is formed in the central portion of the base end side in the axial direction so that the mounting hole 17 can be tightly fitted into the connection terminal 12, and the support connector 16 and the connection terminal 12 are connected. Pin holes 18 and 19 whose centers coincide with each other are provided in the fitting portion in a state of penetrating in the diametrical direction, and both are configured to be detachable by inserting and removing the connecting pin 13. Connecting pin 13
A retaining pin 14 is attached to the tip of the.

In short, the support structure using the support jacks 2 is as shown in FIG.
On the other hand, the jack fixing metal fitting 8 at one end (fixed side) of the support jack 2 which is set to a required length in advance is first attached to the vertical bar 1.
Insert the neck portion 8b into the notch 5a of the jack receiving plate 5 by inserting it into the groove 4 and lowering it. As a result, one end of the support jack 2 is supported by the earth retaining panel 1, so that the operator thereafter supports the other end of the support jack 2 with one hand and bears about 1/2 of the total weight of the jack 2. In this state, the jack fixing metal fitting 8 of the detachable support connector 16 is inserted into the groove 4 of the vertical bar 1, and the neck portion 8b is housed in the notch 5a of the jack receiving plate 5 in a manner of lowering it. Then, the mounting hole 1 of the support connector 16
Connection terminal 12 exposing 7 at the end of the support jack 2
And the connecting pin 13 is inserted to achieve the connection between the two. In this way, there is no obstacle or danger even if the worker releases the support jack 2 from the support jack 2, and the worker slowly calms down and inserts the retaining pin 14 into the tip of the connecting pin 13, and from the vertical bar 3. Shaft hole 8 of jack fixing bracket 8
The assembly can be completed by the work of inserting the positioning shaft 11 penetrating c and inserting the retaining pin 15. Therefore, the number of workers is 1.
Even a person can perform assembly work relatively easily and quickly. Then, the length of the support jack 2 is finally adjusted by turning the manual handle 2c to establish a supporting state in which the earth retaining panels 1 on both sides are firmly supported from the inside at a predetermined interval.

The support connector 16 can be assembled to the support terminal 2 of the support jack 2 with the connecting pin 13 in advance while the support structure is assembled according to the procedure described above. Also in this case, it is possible to easily perform the assembly work by one worker.

[0018]

According to the support structure of the earth retaining panel according to the present invention, even one worker can easily and quickly assemble the support structure, which saves manpower and improves work efficiency. Contribute. In addition, the structure that will never cause the jack fixing bracket to fall off due to vibrations transmitted to the ground or shakes due to other related work, will contribute to highly safe trench excavation work, and also when pushing earth retaining panels. It has a structure that does not cause an excessive external force such as prying on the joint between the fixing bracket and the notch, and there is no risk of local deformation or damage.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire supporting structure of the present invention.

FIG. 2 is a side view showing a usage state of a support jack.

FIG. 3 is a perspective view showing a use state of a support jack.

FIG. 4 is a sectional view of a support jack.

FIG. 5 is a plan view showing a mounting state of the jack fixing bracket.

FIG. 6 is a front view showing a mounting state of a jack fixing member.

[Explanation of symbols]

1 earth retaining panel 2 Support jack 3 vertical bars 4 grooves 5a cutout 5 Jack receiving plate 5a, 5b Spindle member 8b neck 8 jack fixing bracket 13 Connection pin 16 Support Connector 7 cushioning rubber 14 retaining spring 11 retaining shaft 2c manual handle

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshimitsu Takanezawa 2-24-6 Mishuku, Setagaya-ku, Tokyo (72) Inventor Nobuaki Iida 1188-82 Ohishi-cho, Midori-ku, Chiba-shi (72) Inventor Yukio Yokohama-shi, Minami 4-15 Ooka-ku (72) Seiji Kawaguchi Seiji Kawaguchi 769-2 Budoko, Iruma City, Saitama Prefecture (72) Inventor Minji Iimura 1-21-2 Reisen, Hodogaya-ku, Yokohama-shi Reference: JP-A-7-76842 (JP) , A) JP-A-7-252837 (JP, A) Registered utility model 3004203 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02D 17/08 E02D 17/04

Claims (2)

(57) [Claims] 1. A structure in which an earth retaining panel having a groove to be excavated in the ground is supported from inside by a support jack, and a groove opening inwardly is formed in a vertical rail of the earth retaining panel, and the vertical retaining means is provided. A jack receiving plate having a notch opened upward is fixed at the jack mounting position of the crosspiece, and the support jack is provided with the jack receiving plate at one end of a support shaft member configured to extend and contract. A jack fixing metal fitting having a neck portion that can be accommodated in the notch is provided and that is sized to be accommodated in the groove of the vertical bar, and a support connector that is detachable by inserting and removing the connecting pin is provided at the other end portion. The support connector has a neck portion at its tip end that fits in the notch of the jack receiving plate, and has a size that fits in the groove of the vertical rail. Includes wherein the are, 支保 structure of earth retaining panel. 2. The jack fixing member according to claim 1 is formed in a tubular shape having a shaft hole penetrating in a direction perpendicular to a neck portion thereof, and an end portion inside the neck portion is in contact with a vertical crosspiece. A cushion rubber is provided, and the jack fixing metal fitting with the neck part housed in the notch has a positioning axis that penetrates the shaft hole from the vertical rail side of the earth retaining panel to allow vertical tilting of the vertical rail. Support structure for earth retaining panels, characterized by being supported.