JP2874573B2 - Rail foundation and its repair method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail base suitable for cargo handling equipment such as a large portal crane or a gantry crane used in harbors, shipbuilding or heavy equipment manufacturers, or a rail foundation suitable for a cargo service line. It is about the rehabilitation method.

[0002]

2. Description of the Related Art A rail foundation constituting a rail for cargo handling equipment such as a large portal crane or a gantry crane used in harbors, shipbuilding or heavy equipment manufacturers generally has a sectional structure shown in FIG.

[0003] In the drawing, reference numeral 1 denotes a rail base body made of reinforced concrete which is buried and fixed in the underground E except for a top portion and has a longitudinally extending concave portion, 2 is installed on a bottom surface of the concave portion via a bed 3, and both sides are provided. Are rails connected to the base body 1 via anchor bolts 4.

[0004] By the way, for example, mobile cranes in harbors have become increasingly larger in recent years due to the progress of containerization, and their operation rates have become higher.
The same applies to heavy equipment manufacturers, but the existing rail foundations that support them accumulate subsidence and meandering over time, and if such settlements and meandering become large, they will hinder running. Need to do. The repair method is generally performed in the following procedure.

The base body 1 is excavated around the base body 1
After exposing the upper part of the rail to the ground, the existing rail 2 is removed. The upper part of the base body 1 (shown by oblique lines in FIG. 3) is cut off. Clean the joints and place reinforcement bars. Concrete is newly poured in and raised as shown in the imaginary line. After the concrete has solidified, lay the rail 2 again,
Backfill around the base body 1.

[0006]

However, the above rehabilitation method involves a large-scale shaving operation, requires a lot of man-hours, and requires a considerably long construction period. During that time, the operation of the crane is stopped. It was uneconomical.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a rail foundation having a structure which is easy to assemble and disassemble in consideration of future repair work, and a repair method suitable therefor. Is provided.

[0008]

In order to achieve the above-mentioned object, a rail foundation according to the present invention is constructed in a buried state while leaving a top portion in the ground, and has a concave cross section in which a longitudinally extending concave portion is formed. A main body, a level adjuster disposed on a bottom surface of the concave portion, and a level adjuster disposed on an upper surface of the level adjuster;
And a rail fixing block in which rails are integrally arranged at the upper part, and a filling concrete filled in a hollow interior of a pair of bags disposed in a gap between both side portions of the rail fixing block and the inner wall surface of the recess. It is characterized by having.

Further, a method for repairing a rail foundation according to the present invention includes a rail foundation main body having a concave section in cross section, which is constructed in a buried state while leaving a top portion in the ground to form a longitudinally extending concave portion.
A level adjusting portion disposed on the bottom surface of the concave portion, a rail fixing block installed on the upper surface of the level adjusting portion, and a rail integrally disposed on the upper portion; A method of repairing a rail foundation comprising: a filling concrete filled in a hollow interior of a pair of bags disposed in a gap between a wall surface, and a step of removing the filling concrete together with the bags, and A step of lifting the rail together with a fixed block by a lifting jig that is stretched across the concave portion of the rail base body, a step of forming a raised portion in the level adjustment section, and both sides of the fixed block and the inner wall surface of the concave portion. A new bag is disposed in the gap, and the concrete for filling is filled in the bag.

[0010]

[Function] In the above-mentioned rail foundation, after the foundation main body is constructed, the levelness is secured by installing the rail fixing block with the rail integrated in the upper part on the level adjustment part which is the inner bottom surface of the recess in advance. When the bag is inserted into the gap between both sides of the rail fixing block and the inner wall of the recess and filled with concrete, the bag expands and presses on both sides of the rail fixing block. Restrict movement. Although the left and right movement of the rail fixing block is restricted, it is not connected to the filling concrete, so that the rail can be easily removed together with the rail by pulling it out for subsequent repair.

In the method of repairing the rail foundation,
As described above, the concrete for filling, the rail fixing block and the foundation main body are not integrated, so by pulling out this concrete for each bag first, the rail fixing block for the rail can be removed together with the rail. As a result, it is raised to a predetermined height while keeping its horizontality and linearity constant. At this stage, while maintaining the desired raised height, the raised portion is fixed at the raised height position by arranging the raised portion, and then also fixed in the lateral direction by filling the filling concrete through the bag body.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a rail foundation according to the present invention.

The rail foundation in the figure is a rail foundation main body 1 made of reinforced concrete having a recessed section 10a which is constructed in a buried state while leaving a top portion underground E and has a recessed portion 10a having a longitudinal through shape.
0, a level-adjusting concrete (including mortar) 12 disposed on the bottom surface of the concave portion 10 a of the base body 10.
And a rail fixing block 16 which is installed at the center of the upper surface of the level adjusting concrete 12 and in which a rail 14 is previously arranged integrally, and is disposed in a gap between both side portions of the rail fixing block 16 and the inner wall surface of the recess 10a. A filling concrete 20 made of quick-setting concrete filled in a gap shape through a pair of bags 18 made of polyethylene sheet or the like, and an upper part of the filling concrete 20 laminated at the same level as the lower surface of the rail 14; The asphalt mortar 22 is integrated with a reinforcing bar (not shown) inserted in the concrete 20 for filling. The level of the rail 14 is maintained by the level adjusting concrete 12, and the linearity is maintained by pressing the filling concrete 20 on the right and left sides of the rail fixing block 16.

The rails 14 are provided on a plurality of bed plates 24 disposed on a rail fixing block 16 as shown in an enlarged part of FIG. 26, and is fixed to the left and right by a clamp fitting 30 provided at the top of a mounting bolt 28 which penetrates through the bed plate 24 and is screwed into an anchor bolt 28a embedded and fixed in the rail fixing block 16. The top of the asphalt mortar 22 is laid on the top of the bed plate 24 so as to be at the same level.

The rail pad 26 is used to correct the height when the unequal squat difference is 6 mm or less, and the bed plate 24 is used to correct the unequal squat difference within the range of 25 to 75 mm. Daily maintenance other than major repair work is finely adjusted by inserting the rail pad 26 and the bed plate 24 into the rail pad 26 and the bed plate 24.

Next, a description will be given of a method of repairing the rail foundation having the above-described structure when the difference in uneven settlement reaches 75 mm or more, with reference to FIG. is there).

First, the asphalt mortar 22 located on the left and right uppermost layers in the concave portion 10a is shaved while the concrete for filling 20 is pulled out, so that the rail fixing block 16 is provided in the concave portion 10a as shown in FIG. Will be left behind. During the operation, the asphalt mortar 22 can be easily peeled off, and the concrete 20 for filling, the rail fixing block 16 and the base body 10 are separated via the bag body 18 so that the concrete 20 can be separated from the bag body 18 together. Can be pulled out.

Next, as shown in FIG. 2B, the rail is moved by a chuck portion 34a provided on a lifting jig 34 which is bridged on both sides of the top of the rail base body 10 via jacks 32 across the recess 10a. Chuck 14
By the jack-up operation of the jack 32, the rail 14 is lifted up to a desired raised position together with the rail fixing block 16 while maintaining the horizontality and linearity of the rail 14.

After the lifting operation is completed, the raised mortar 36 is filled between the bottom surface of the rail fixing block 16 and the adjustment concrete 12 as shown in FIG.

After the mortar 36 is solidified, the bags 18 are arranged on the left and right sides of the rail fixing block 16 as shown in FIG. When injected from the entrance, the filling of the filling
Expand along the shape of the gap, and the left and right sides of the rail fixing block 16 are fixed by the solidification of the concrete 20.

After that, when a new asphalt mortar 22 is cast on the top of the concrete filling 20, the rail 14 has a cross-sectional shape similar to that of FIG. The modified rail foundation will be obtained.

Further, after removing the lifting jig 34,
If necessary, the tops on both sides of the rail base body 10 are raised. This raising is performed by exposing by excavation, cutting, cleaning, arranging reinforcing bars, and placing concrete, as in the conventional method. However, the amount of work is significantly smaller than the conventional repair method.

[0023]

As described in detail in the above embodiments, in the rail foundation according to the present invention, after the foundation main body is constructed, the rail fixing block in which the rail is integrated on the upper part is previously mounted on the inner bottom surface of the recess. If the bag is inserted into the gap between both sides of the rail fixing block and the inner wall of the recess and filled with concrete, the bag expands and the rail expands. The horizontal movement of the fixed block is restricted by pressing both sides of the fixed block and solidifying the concrete. Although the left and right movement of the rail fixing block is restricted, it is not connected to the concrete filling, so it can be easily removed together with the rail by pulling it out for subsequent renovation, which is a modification to the conventional structure It is a structure that can be freely disassembled and assembled on the premise of.

In the repair of the rail foundation described above, the rail fixing block can be removed together with the rail by first pulling out the filling concrete together with the bag body, and by lifting the rail fixing block through a lifting jig. It rises to a predetermined height while keeping the degree and the linearity constant. At this stage, while maintaining the desired raised height, the raised portion is fixed at the raised height position by arranging the raised portion, and then the horizontal direction is also fixed by filling with new filling concrete through the bag body. In addition, there is no conventional work such as shaving of the main body of the foundation or splicing of concrete, so that there is an advantage that the repair work is easy and the construction period can be shortened.

Therefore, the present invention is suitable for rails for cargo handling facilities such as large portal mobile cranes and gantry cranes used in harbors, shipbuilding, heavy equipment manufacturers, and the like, or cargo service lines.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rail foundation according to the present invention.

FIGS. 2A to 2D are cross-sectional explanatory views showing a repair procedure of the rail foundation.

FIG. 3 is a cross-sectional view for explaining a conventional rail foundation and repair thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Rail base main body 12 Adjustable concrete (adjustment part) 14 Rail 16 Rail fixing block 18 Bag body 20 Filling concrete 28a, 28, 30 Fastening fitting (28a Insert nut, 28 Mounting bolt, 30 Clamping tool) 32 Jack 34 Lifting jig 34a chuck part 36 raising mortar

Claims (2)

(57) [Claims] 1. A rail base body having a concave cross section in which a top portion is left underground and formed in a buried state to form a longitudinally extending concave portion, a level adjusting portion disposed on a bottom surface of the concave portion, and the level adjusting portion. A rail fixing block that is installed on the upper surface of the section and the rail is integrally arranged on the upper part, and a hollow inside of a pair of bags disposed in a gap between both side parts of the rail fixing block and the inner wall surface of the recess. A rail foundation comprising: filling concrete to be filled. 2. A rail base body having a concave cross-section formed in a buried state while leaving a top portion underground to form a longitudinally extending concave portion, a level adjusting portion disposed on a bottom surface of the concave portion, and the level adjusting portion. A rail fixing block that is installed on the upper surface of the section and the rail is integrally arranged on the upper part, and a hollow inside of a pair of bags disposed in a gap between both side parts of the rail fixing block and the inner wall surface of the recess. A method for repairing a rail foundation with filling concrete to be filled, wherein the step of removing the filling concrete together with the bag, and a lifting jig that is bridged across a recess of the rail foundation body. A step of lifting the rail together with the fixed block, and a step of forming a raised portion in the level adjustment section,
A method of repairing a rail foundation, characterized in that a new bag is disposed in a gap between both sides of the fixed block and the inner wall surface of the recess, and the concrete for filling is filled in the bag.