JP2006291462A - Removing method and removing instrument for earth retaining supporting jack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel means for turning operation of a jack 1 unable to be loosened by ordinary turning operation at a site where the jack 1 is provided in an intermediate section of a supporting beam member (H-steel) provided on a transverse beam member along a sheet pile. <P>SOLUTION: Three short, middle-length, and long connection operation arm bodies 2, 3, 4 having different length are mounted on an operation rod 12 provided by protruding in four directions of a rotary shaft 11 of the jack 1 provided in the longitudinal direction of the supporting beam member in the direction of jack loosening rotation in order and are fixed on the supporting beam member. A tip (a locking transparent hole 55) of a cantilever beam body 5 overhanging up to the vicinity of a position where a tip part becomes a concentric circle with an outer end when the long connection operation arm body on a turning face of the operation rod is mounted and a tip (a hooking part 22) of the short connection operation arm body are mutually connected by abutting and supporting a wire member on tips of the long and middle-length connection operation arm bodies slidably by the wire member and a winding hand tool (a lever block 6) of the wire member, and the jack operation rod is rotated in the direction of loosening rotation by winding of the winding hand tool to loosen the jack. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for removing a soil retaining support jack and a removal device used in the method.

  In civil engineering work, a sheet pile for earth retaining is provided on the wall surface of the excavation site so that the wall surface of the excavation site does not collapse and the execution of a predetermined work is not hindered at the excavation site. In addition, a supporting beam member is installed between the transverse beam member facing the transverse plate member that follows the sheet pile so that the sheet pile does not collapse due to earth pressure. A jack is interposed in the support beam member so as to press the sheet pile toward the earth wall surface (Patent Document 1).

  In particular, as shown in FIG. 4, when a jack 1 is interposed in the middle of a supporting beam member (H steel) C installed on a cross beam member B attached to a sheet pile A, this jack 1 is usually a screw jack. The operation rod 12 is provided on the outer periphery of the rotating shaft 11, and the jack 1 is expanded and contracted by rotating the operation rod 12.

FIG. 2 of JP-A-8-109634.

  By the way, when the construction is completed in the above-mentioned civil engineering work, the jack 1 is loosened and removed, and then the support beam member C, the cross beam member B, and the sheet pile A are sequentially removed.

  However, when the jack 1 is removed, earth and sand adhere to the exposed rotating shaft 11 of the jack 1, or the rotating shaft portion rusts if the construction period is long, and the jack 1 can be loosened in a normal rotating operation. I couldn't.

  For this reason, the removal work of the jack 1 was forcibly removed by a crane or the like while keeping the pressing force between the supporting beam members without loosening the jack. This detaching means has a problem that the jack is damaged.

  Accordingly, the present invention proposes a novel method for removing a retaining ring jack and a removing device.

  The method of removing the earth retaining support jack according to the present invention includes a short, medium and long length of operation rods protruding in four directions of the rotation axis of the screw jack interposed in the longitudinal direction of the support beam member for earth retaining. Three connecting operation arm bodies are mounted in order in the slow rotation direction of the jack, fixed to the support beam member, and near the position where the tip part is concentric with the outer end when the long connecting operation arm body is mounted on the operating rod rotation surface Between the tip of the cantilever beam extended to the tip of the short connection operation arm and the wire member and the wire member take-up tool, the wire member is placed at the tip of the long connection operation arm. It is characterized in that it is slidably abutted and supported and connected, and the jack is loosened by rotating the jack operating rod in the slow rotation direction by winding the winding tool.

  Further, the earth retaining support jack removing device according to the present invention has a cylindrical length that allows an operation rod projecting in four directions of the rotation axis of the screw jack interposed in the longitudinal direction of the supporting beam member for earth retaining to be inserted. Short connection operation arm, comprising a three-connection operation arm body having different structures, a cantilever body attached to a support beam member and projecting to a predetermined position, and a lever block having a chain provided with a locking rod at the tip. The body is provided with a latching portion for a locking rod, and a chain slide receiving portion is provided at the tip of the middle and long coupled operating arm bodies. Further, the base side of the long coupled operating arm body is provided. It is formed by bending at an appropriate angle.

  Thus, the base part of the cantilever body is fixed to the support beam member, and the long connection operation arm body, the middle connection operation arm body, and the short connection operation arm body are sequentially attached to the jack of the jack from the position close to the cantilever body. Then, the lever block chain locked to the cantilever is brought into contact with the slide receiving portions at the ends of the long connection operation arm body and the middle connection operation arm body, and the tip locking rod is attached to the short connection operation arm body. When the lever block chain is taken up by hooking it on the latching part, the short connecting arm is directly given a rotational moment in the loosening direction, and the medium long connecting arm is Due to the difference in the tensioning direction, a rotational moment is given in the loosening direction, and the jack can be loosened by rotating the jack rotating shaft with a strong force.

  In addition, by providing a bent part on the base side of the long connection operation arm body, the insertion direction to the jack operation rod in the situation where the long connection operation arm body cannot rotate the jack due to the presence of other support beam bodies. Can be dealt with by changing

  The present invention has the above-described configuration, and the earth retaining support jack, which could not be loosened by a normal manual rotation operation, can be easily loosened and rotated by operating a lever block.

  Next, an embodiment of the present invention will be described. A jack 1 which is an object of the present invention is interposed between support beam members (H steel) C that press and support a transverse beam member B attached to a sheet pile A as illustrated in FIG. Reference numeral 1 denotes a pressing plate 13 and screw holes 14 at both ends, which are connected to each other by a rotating shaft 11, and an operating rod 12 projecting from the outer periphery of the rotating shaft 11.

  The removal device for the earth retaining jack 1 includes three connecting operation arm bodies 2, 3, 4 having different short, medium and long lengths, a cantilever body 5, and a lever block 6.

  The connection operation arm bodies 2, 3, and 4 are formed of tubular bodies (tubular bodies), and are provided with fixing bolts 21, 31, and 41 that can be externally inserted into the operation rod 12 of the jack 1 and press the operation rod 12 when attached. It is provided.

  In particular, the latching portion 22 of the locking rod 61 of the lever block 6 is provided at the tip of the short connection operation arm body 2, and the chain 62 of the lever block 6 is provided at the tips of the middle and long connection operation arm bodies 3 and 4. The slide receiving portions 32 and 42 are provided, and the base side of the long connecting operation arm body 4 is bent at an angle of 10 to 20 degrees.

  The cantilever body 5 is provided with a nut portion 52 that is fixed to the support beam member C at the base portion 51, the intermediate portion 53 is an inclined portion, and the tip portion 54 is provided with a locking through hole 55. 52, the inclined shape of the intermediate portion, and the formation position of the locking through hole 55 are the positions of the locking through hole 55 when the cantilever 5 is fixed to the support beam member C. The operation bar 12 is on the rotation plane and is in the vicinity of a concentric circle with the outer end when the long connecting operation arm body 4 is mounted on the operation bar 12.

  The lever block 6 is a well-known winding device, and has a locking bar 64 attached to a main body 63 that winds a chain 62 provided with a locking bar 61 at the tip.

  Thus, in order to remove the earth retaining support jack 1, the cantilever 5 is fixed to the support beam member C, and the tip of the cantilever 5 is disposed at a predetermined location. Next, the long connection operation arm body 4, the middle connection operation arm body 3, and the short connection operation arm body 2 are mounted in order from the operation rod 12 at a location near the tip 54 of the cantilever body 5.

  Further, a locking rod 64 attached to the main body 63 of the lever block 6 is hooked into the locking through hole 55 of the cantilever body 5, the chain 62 is extended, and from the sliding receiving portion 42 at the tip of the long connection operating arm body 4. The middle connection operation arm body 3 is wound in contact with the slide receiving portion 32 at the front end of the middle connection operation arm body 3, and the front end locking rod 61 is hooked on the latching portion 22 of the short connection operation arm body 2.

  When the winding operation of the chain 62 is performed by the operation lever of the main body of the lever block 6, the short connection operation arm body 2 is directly given a rotational moment in the loosening direction by the pulling tension of the chain 62. At the same time, the middle connection operation arm 3 and the long connection operation arm 4 have different chain tension directions at the chain contact points, and thereby a rotational moment is applied in the loosening direction. It is rotated with a strong force and the jack 1 is loosened.

  In the above embodiment, the lever block 6 which is an existing tool is used. However, the method of the present invention is not particularly limited to this device, and a winding device other than the lever block may be used. .

The front view of the cantilever body of embodiment of this invention instrument. The partially cut front view of the short connection operation arm body. (A) is a partially cut front view of the same length connection operation arm body, (b) is a partial side view of the tip. Explanatory drawing of this invention object. The top view of the mounting state of the cantilever body. Explanatory drawing of rotation operation of the jack.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Jack 11 Rotating shaft 12 Operation rod 13 Pressing plate 14 Screw hole part 2 Short connection operation arm body 21 Fixing bolt 22 Latching part 3 Middle connection operation arm body 31 Fixing bolt 32 Sliding receiving part 4 Long connection operation arm body 41 Fixation Bolt 42 Sliding receiving portion 5 Cantilever 51 Base 52 Nut 53 Intermediate 54 Front 55 Locking through hole 6 Lever block 61 Locking rod 62 Chain 63 Main body 64 Locking rod

Claims (3)

  Three short, medium and long connecting operation arm bodies with different lengths are connected to the jack in the slow rotation direction on the operation rod protruding in the four directions of the rotation axis of the screw jack interposed in the longitudinal direction of the support beam member for earth retaining. The tip of a cantilever beam body that is mounted in order, fixed to the support beam member, and projecting to the vicinity of a position that is concentric with the outer end when the long connection operation arm body is mounted on the operation rod rotation surface; With the wire member and the wire member winding tool, the wire member is slidably abutted and supported between the tip of the short connection operation arm body and the winding member. A method for removing a soil retaining support jack, comprising loosening a jack by rotating a jack operating rod in a slow rotation direction by winding a tool.   Three connecting operation arm bodies with different cylindrical lengths that can be inserted with operation rods protruding in four directions of the rotation axis of the screw jack interposed in the longitudinal direction of the support beam member for earth retaining, and the support beam A cantilever that is attached to the member and extends to a predetermined position, and a lever block having a chain provided with a locking rod at the tip, and a latching portion of the locking rod is provided at the tip of the short connection operation arm An earth retaining support jack removing device comprising a chain slide receiving portion provided at the tip of the middle and long coupled operating arm bodies.   The detachment support jack of the earth retaining support jack according to claim 2, wherein the base side of the long connection operation arm is bent at an appropriate angle.

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