JPH08169682A - Rail base and its repairing method - Google Patents

Abstract

PURPOSE: To establish a rail foundation which allows easy performance of assembly and disassembly by installing a rail fixing block with whose upper part a rail is consolidated, on a level adjusting part as the inner bottom surface of a rail foundation recessed part, inserting sacks into the gaps between the two sides of this rail fixing block and the inner wall surface of the recessed part, and filling them with a filler concrete. CONSTITUTION: A rail foundation has a body part 10 of ferro-concrete having a recessed section, which is constructed in embedded condition with the top left underground E and has a recessed part 10a in through form in the longitudinal direction, and a level adjusting concrete 12 is furnished on the bottom surface of the recessed part 10a. A rail fixing block 16 with whose upper part a rail 14 is consolidated, is installed in the center of the oversurface of the level adjusting concrete 12, and a pair of sacks 18 made of polyethylene sheet, etc., are inserted into the gaps between the two sides of the block 16 and the inner wall surface of the recessed part 10a, and they are filled with a filler concrete 20 consisting of a quick solidifying concrete. On this filler concrete 20, asphalt mortar 22 is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rails suitable for cargo handling equipment such as large-sized gate-type mobile cranes and gantry cranes used in ports, shipbuilding or heavy equipment manufacturers, and rail foundations suitable for cargo lead-in lines. It relates to the repair method.

[0002]

2. Description of the Related Art A rail foundation constituting a rail for cargo handling equipment such as a large gate type mobile crane and a gantry crane used in a harbor, shipbuilding or heavy equipment manufacturer generally has a sectional structure shown in FIG.

In the figure, 1 is a reinforced concrete rail foundation body which is embedded and fixed in the ground E except for the top, and has a longitudinally extending recess, and 2 is installed on the bottom surface of the recess via a bed 3 and on both sides. Is a rail connected to the base body 1 via anchor bolts 4.

By the way, for example, mobile cranes in harbors have become larger and larger in recent years due to the progress of containerization, and have a high operating rate.
The same applies to heavy equipment manufacturers, but the existing rail foundations that support them accumulate subsidence and meandering over time, and if such subsidence and meandering become large, it will interfere with running, so repair in this case. 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 to the ground surface, the existing rail 2 is removed. The upper part of the base body 1 (shown with diagonal lines in FIG. 3) is scraped off. Clean the splice and place reinforcing bars. Concrete is newly placed and the height is raised as shown in the imaginary line. After the concrete has solidified, lay the rail 2 again,
Backfill the periphery of the base body 1.

[0006]

However, in addition to the large-scale scavenging work, the above-mentioned repair method requires a large number of man-hours and a considerably long construction period, and the crane operation is stopped during that period. It was uneconomical.

The present invention has been made in view of the above problems, and its purpose is to anticipate future repair work, and to construct a rail base which is easy to assemble and disassemble, and a suitable repair method therefor. Is provided.

[0008]

In order to achieve the above-mentioned object, a rail foundation according to the present invention is a rail foundation having a concave cross section, which is constructed in a buried state with a top portion left in the ground to form a longitudinally extending concave portion. A main body, a level adjusting section arranged on the bottom surface of the recess, and an upper surface of the level adjusting section,
And a rail fixing block in which rails are integrally arranged, and filling concrete filled in the hollow inside 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 and.

Further, the rail foundation repairing method according to the present invention comprises a rail foundation main body having a concave cross section, which is constructed in a buried state with a top portion left in the ground to form a longitudinal through recess.
A level adjusting portion arranged on the bottom surface of the recess, a rail fixing block installed on the upper surface of the level adjusting portion and having a rail integrally arranged on the upper portion, both side portions of the rail fixing block and the inside of the recess. A method of repairing a rail foundation comprising a filling concrete filled in the hollow inside of a pair of bags arranged in a gap between a wall surface, a step of removing the filling concrete together with the bags, and A step of hoisting the rail together with a fixed block by a hoisting jig that is hung over the recessed portion of the rail foundation body, a step of forming a raised portion in the level adjustment portion, both sides of the fixed block and the inner wall surface of the recessed portion. A new bag is placed in the gap and the filling concrete is filled in the bag.

[0010]

[Operation] In the above rail foundation, after building the main body of the rail, leveling is ensured by installing the rail fixing block with the rail integrated on the top in advance on the level adjusting section which is 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 surface of the recess to fill the space with concrete, the bag expands and presses both sides of the rail fixing block, and the solidification of the concrete causes the fixing block to move horizontally. Regulate movement. Although the rail fixing block is restricted from moving to the left and right, it is not connected to the stuffed concrete, so it can be easily pulled out together with the rail by pulling it out for later repair.

In addition, in the method of repairing the rail foundation,
As mentioned above, the filling concrete, the rail fixing block and the foundation body are not integrated, so the rail fixing block can be removed together with the rail by first pulling out the concrete for each bag, and the rail fixing block can be removed via the lifting jig. It is lifted to a predetermined height while keeping its horizontality and straightness constant. At this stage, while maintaining the desired raised height, the raised portion is arranged so that the raised portion is fixed at the raised height position, and then it is also fixed laterally by filling the filling concrete with the bag body.

[0012]

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

The rail foundation shown in the figure is a rail foundation body 1 made of reinforced concrete having a concave cross section and having a recess 10a having a longitudinal through shape, which is constructed to be buried in the ground E with the top left.
0 and level adjustment concrete (including mortar) 12 arranged on the bottom surface of the recess 10a of the base body 10
And a rail fixing block 16 installed at the center of the upper surface of the level-adjusting concrete 12 and having a rail 14 integrally arranged on the upper part in advance, and arranged in a gap between both side portions of the rail fixing block 16 and the inner wall surface of the recess 10a. The filling concrete 20 made of quick-setting concrete filled in a gap shape via a pair of bags 18 made of polyethylene sheet or the like, and the filling concrete 20 is laminated on the upper surface of the filling concrete 20 at the same level as the lower surface of the rail 14, and The asphalt mortar 22 integrated with the reinforcing bars (not shown) inserted in the filling concrete 20 is provided. The level of the rail 14 is maintained by the level-adjusting concrete 12, and the straightness is maintained by pressing the left and right sides of the rail fixing block 16 with the filling concrete 20.

As shown in an enlarged view of a part of the drawing, the rail 14 is provided on a plurality of bed plates 24 arranged on a rail fixing block 16 and a plurality of rail pads having the same width as the lower portion of the rail 14. 26 is installed via 26, the left and right are fixed by a clamp metal fitting 30 provided on the top of a mounting bolt 28 that is screwed into an anchor bolt 28a that is fixed through the bed plate 24 and embedded in the rail fixing block 16. The top end of the asphalt mortar 22 is laid on the top end of the bed plate 24 so as to be at the same level.

The rail pad 26 corrects the height when the uneven settlement difference is 6 mm or less, and the bed plate 24 corrects the uneven settlement difference in the range of 25 to 75 mm. Routine maintenance other than major renovation work is intervening and is finely adjusted by inserting the rail pad 26 and the bed plate 24.

Next, a method of repairing the rail foundation having the above-described configuration when the difference in uneven settlement reaches 75 mm or more will be described with reference to FIG. 2 (note that the condition of uneven settlement is exaggerated in FIG. 2). is there).

First, the asphalt mortar 22 located on the left and right uppermost layers in the recess 10a is removed, and the filling concrete 20 is pulled out, so that the rail fixing block 16 is provided in the recess 10a as shown in (a). Left behind. During work, the asphalt mortar 22 can be easily peeled off, and the concrete 20 for packing and the rail fixing block 16 and the base body 10 are separated via the bag body 18. Can be pulled out.

Next, as shown in (b), both ends of the rail are supported by a chuck portion 34a provided on a lifting jig 34 which is laid over both sides of the top of the rail base body 10 via jacks 32 so as to straddle the recess 10a. Chuck 14
By jacking up the jack 32, the rail fixing block 16 is lifted up to a desired raised position while maintaining the levelness and linearity of the rail 14.

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

After the mortar 36 is solidified, the bags 18 are arranged on the left and right of the rail fixing block 16 as shown in (d), and then a new filling concrete 20 made of quick-setting concrete is added to the bag 18 not shown. If it is injected from the inlet, the bag 18 is filled with the filling concrete 20.
Expands along the gap shape, and the left and right of the rail fixing block 16 are fixed by the solidification of the concrete 20.

After that, when a new asphalt mortar 22 is placed on the top of the stuffed concrete 20, the cross-sectional shape is similar to that of FIG. You will be able to obtain the rail foundation that has been renovated.

Further, after removing the lifting jig 34,
The tops of both sides of the rail base body 10 are raised as needed. As in the conventional method, this raising is performed by exposure by excavation, scumming, cleaning, arranging reinforcing bars, and placing concrete, but the amount of work is significantly smaller than in the conventional repairing method.

[0023]

As described above in detail with reference to the embodiments, in the rail foundation according to the present invention, after the foundation body is constructed, the rail fixing block having the rail integrated in the upper portion is previously formed on the inner bottom surface of the recess. By installing it on the level adjustment part, the levelness is secured, and if the bag body is inserted into the gap between both sides of the rail fixing block and the inner wall surface of the recess and filled with filling concrete, the bag body will expand and the rail will expand. The horizontal movement of the fixed block is restricted by pressing both sides of the fixed block and solidifying the concrete. Although the rail fixing block is restricted from moving to the left and right, it is not connected to the stuffed concrete, so it can be easily pulled out together with the rail for later repairs. It has a structure that allows free disassembly and assembly.

Further, in the above-mentioned repair of the rail foundation, the rail fixing block can be removed together with the rail by first pulling out the bagging concrete for each bag, and the rail fixing block can be lifted horizontally through the lifting jig. It rises to a predetermined height with the degree and straightness kept constant. At this stage, while maintaining the desired raised height, it is fixed at the raised height position by arranging the raised portion, and then it is also fixed in the horizontal direction by filling new padding concrete through the bag. Since there is no work such as scavenging of the basic body and splicing of concrete, 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 equipment such as large-sized gate-type mobile cranes and gantry cranes used in harbors, shipbuilding or heavy equipment manufacturers, or cargo lead-in lines.

[Brief description of drawings]

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

2 (a) to (d) are cross-sectional explanatory views showing a procedure for repairing the rail foundation.

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

[Explanation of symbols]

10 Rail Foundation Main Body 12 Adjusting Concrete (Adjusting Section) 14 Rail 16 Rail Fixing Block 18 Bag Body 20 Padding Concrete 28a, 28, 30 Fastening Metal Fittings (28a Insert Nuts, 28 Mounting Bolts, 30 Clamping Tools) 32 Jack 34 Lifting Jig 34a chuck part 36 raised mortar

Claims (2)

[Claims] 1. A rail base body having a concave cross-section, which is constructed to be buried in the ground leaving an apex and has a longitudinally extending recess, a level adjusting unit disposed on the bottom surface of the recess, and the level adjusting. A rail fixing block which is installed on the upper surface of the portion and in which the rail is integrally arranged on the upper portion, and a hollow inside of a pair of bags arranged in the gap between both side portions of the rail fixing block and the inner wall surface of the recess. A rail foundation provided with filling concrete for filling. 2. A rail base body having a concave cross section, which is constructed to be buried in the ground leaving a top portion and has a longitudinally extending concave portion, a level adjusting portion arranged on the bottom surface of the concave portion, and the level adjusting portion. A rail fixing block which is installed on the upper surface of the portion and in which the rail is integrally arranged on the upper portion, and a hollow inside of a pair of bags arranged in the gap between both side portions of the rail fixing block and the inner wall surface of the recess. A method of repairing a rail foundation comprising filling concrete to be filled, wherein the step of removing the filling concrete together with the bag body, and the lifting jig suspended over the recessed portion of the rail foundation body A step of hoisting the rail together with a fixed block, a step of forming a raised portion in the level adjusting portion,
A method of repairing a rail foundation, wherein a new bag is arranged in a gap between both sides of the fixed block and the inner wall surface of the recess, and the bag is filled with filling concrete.