JP2749541B2 - Box culvert laying 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 method of laying a box culvert, and more particularly to a method of installing a box culvert suitable for working in a narrow mine.

[0002]

2. Description of the Related Art As a method of laying a box culvert used as a culvert or the like, a method of hanging it with a crane in an open-cut space has been most commonly used, but it is a narrow space where a crane cannot enter. Such a construction method cannot be adopted for construction under a bridge or under a bridge.

In such a case, conventionally, a box culvert is mounted on a roller such as a log, and the box culvert is rolled to the laying position manually to be laid. However, such a laying method using a roller is not only inefficient, but also has a problem in safety when an operator pulls out the roller at the laying position because the worker may be caught between the box culvert and the roadbed.

The present inventor has proposed a laying method using a box culvert conveying device in Japanese Utility Model Laid-Open Publication No. Sho 59-18830 and Japanese Utility Model Laid-Open Publication No. Sho 62-31186 to solve such a problem. did.

[0005] In this method, a traveling cart is disposed on both sides of a concrete subgrade on which a box culvert is placed;
Using a transport device equipped with a lifting platform that is provided at the top of the traveling vehicle and lifted by a jack, the box culvert is jacked up and moved to the installation position, where it is jacked down and installed at the target position,
As a result, the workability was greatly improved and safety was secured as compared with the manual construction using a conventional roller.

[0006]

On the other hand, when a box culvert is used for sewerage, a steep slope is avoided and a mud is formed.
A so-called drop structure having a step of several cm to several tens cm on the roadbed may be formed. Although the laying method using the box culvert conveying device has the above-mentioned advantages, it has been difficult to adopt the conventional method when such a head is provided.

The present invention solves the problems of the above-described laying method using a transfer device, and provides means for laying a box culvert using a transfer device on a subgrade with a head drop, and It is intended to further spread the device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a traveling truck disposed on both sides of a concrete subgrade on which a box culvert is placed, and a jack provided on an upper portion of the traveling truck. A method of laying a box culvert on a subgrade having a head using a box culvert transport device having a lifting platform that moves up and down,
A rail for a traveling carriage that is continuous over the upper part and the lower part of the drop part is laid, a plurality of subfloor spacer members on which a box culvert can be mounted are placed on the lower part of the installation place subfloor, and the box culvert is After the mounted bracket is supported by the elevator and the traveling trolley is driven to transport the box culvert to the lower installation position, the elevator is jacked down and the box culvert is temporarily placed on the road floor spacer member. After further releasing the contact between the lifting platform and the bracket by jacking down, the mounting position of the bracket is moved upward,
A plurality of spacer members are sandwiched between the same bracket and the elevator, the elevator is jacked up, and after removing the spacer member provided on the roadbed, the elevator is jacked down to perform the box culvert. Placed on the subgrade spacer member, jack down the elevator further to remove a part of the spacer member sandwiched between the elevator and the bracket, and then jack up the elevator. After removing the spacer member provided on the subgrade, the lifting platform is again jacked down, and a box culvert is placed on the subgrade spacer member. It is characterized by laying a box culvert.

Here, the spacer member sandwiched between the lifting platform and the bracket and the spacer member for the subgrade are not particularly limited in their materials, but they are easy to handle at the time of construction and are hardly distorted. It is preferable to use a board made of wood.

[0010]

A rail for a traveling vehicle is laid continuously over the upper and lower tiers of the head, and a spacer member and a spacer member for a roadbed are sandwiched between a lifting platform and a bracket by repeatedly jacking up and down. Alternately, it is possible to lay a box culvert on a stepped roadbed using a conventional transport device having a jack stroke.

[0011]

FIG. 1 is a perspective view of a transfer apparatus used for carrying out the present invention, and FIG. 2 is a side view of the transfer apparatus shown in FIG.

In the drawing, reference numeral 1 denotes a traveling bogie having a rectangular cross section, a hollow portion formed therein, and a wheel 2 rotatably mounted thereon.
Is a drive motor fixed to one end of the traveling vehicle 1 together with the speed reducer, and constitutes a drive system for rotatingly driving the wheel 2 from the speed reducer 4 via the chain 5. The drive of the traveling vehicle 1 is performed by remote control using a remote control switch (not shown) connected to the drive motor 3.

Reference numeral 6 denotes a hydraulic jack fixed in the hollow portion of the traveling vehicle 1. The operation of the hydraulic jack 6 is performed by the above-mentioned remote control switch. An electric hydraulic pump 8 that drives a hydraulic jack 6 is provided on a bridge 7 that connects the pair of traveling vehicles 1 and 1 at their base ends.

Reference numeral 9 denotes a lifting platform mounted on the traveling vehicle 1, which has a sectional shape that is concave downward so as to cover the upper surface and both side surfaces of the traveling vehicle 1. The lift 9 is moved up and down by jacking up and jacking down the hydraulic jack 6.

Numeral 10 denotes a lateral feeder provided on one of the traveling carts 1. A handle (not shown) is set on a handle mounting portion 10b provided below the slide base 10a, and this is manually rotated. Thereby, the slide base 10a can be moved in a direction perpendicular to the traveling direction. A roller 11 for moving the box culvert smoothly when the lateral feed device 10 is operated is provided on the other traveling vehicle 1 at a position corresponding to the lateral feed device 10.

Next, with reference to FIGS. 3 to 6, a method of laying on a stepped roadbed using the box culvert conveying device will be described.

FIG. 3 is a side view in the longitudinal direction for explaining the laying method of the present invention, and FIG. 4 is a sectional view taken along line AA of FIG.
Reference numeral 0 denotes a concrete subgrade provided with a head portion and comprising an upper subgrade 30a and a lower subgrade 30b. Numeral 31 denotes a rail for moving the transfer device provided on the concrete subgrade 30 and is provided directly on the upper subgrade 30a and on the H steel 32 on the lower subgrade 30b. Here, the height h of the H steel material 32 is, as shown in the sectional view of FIG.
, So that the rail 31 is
And is arranged so as to be continuous from the lower roadbed 30b.

B ₁ and B ₂ are box culverts already laid on the lower subgrade 30b, B ₃ is a box culvert in the middle of laying, and 35 is attached to the side of the box culvert B ₃ by bolts 35a. Bracket. In the time box culverts B ₃ transport, bracket 35 is not the position of the bolt 35a, it is attached to the position of the bolt holes 35b. Several wooden spacer members 40 are jacked up between the bracket 35 and the elevating table 9 in a state of being sandwiched.

FIG. 5 and FIG. 6 are sectional views showing the construction procedure of this embodiment. FIG. 5A shows the entire vertical cross section between the box culverts B ₂ and B ₃ in FIG. 3, and more specifically, the upper subgrade 3 by the transport device shown in FIGS.
After being transported from 0a side to the lower subgrade 30b is laid position, placed on the lifting platform 9 once subgrade spacer member 41 box culvert B ₃ is a jack-down, the elevator platform 9 by further jack down bracket After releasing the contact with the bracket 35, the mounting position of the bracket 35 is moved upward from the bolt hole 35b and fixed with the bolt 35a,
A state in which a plurality of spacer members 40 are sandwiched between the bracket 35 and the lift 9 and the lift 9 is jacked up again is shown.

On the lower subgrade 30b, a plurality of subgrade spacer members 41 of the same material as the spacer member 40 are arranged at predetermined intervals in advance, and the height of the subgrade spacer members 41 is set to the box culvert B during transportation. ₃ and a space is formed between the lower surface and the lower surface. Thereby, it can be conveyed to the laying position without receiving any resistance by the road floor spacer member 41. In addition, the spacer member 40,
As a material of 41, wood is preferable because it is easy to handle at the time of construction and distortion and the like hardly occur.

[0021] by operating the jack 6 from the state shown in FIG. 5 (a) is a jack-down, to support the box culvert B ₃ by subgrade spacer member 41, further allowed to jack down to the state of FIG. 5 (b), One spacer member 40 disposed between the bracket 35 and the elevator 9 is removed.

[0022] Then the box culvert B ₃ and jacked up to lift the bracket 35 and the state of Fig. 5 (c), removing a piece of subgrade spacer member 41.

[0023] further to jack down as shown in FIG. 6 (a), supporting the box culvert B ₃ in subgrade spacer member 41. At this stage, the box culvert B ₃ is moved from the state of FIG.
That is, it has been lowered by one sheet.

Next, as shown in FIG. 6B, the jack is lowered until there is a space between the bracket 35 and the spacer member 40, and the second spacer member 40 provided on the lift 9 is removed. .

[0025] successively repeating this, the bracket 35 and the spacer member 40 between the elevator platform 9, and box culverts B ₃ be removed one by one alternately subgrade spacer members 41 between the lower surface and the lower subgrade 30b FIG.
As shown in (c) can be laid box culvert B ₃ on the lower path floor 30b.

As described above, according to the laying method of the present embodiment, the rails 31 for the traveling vehicle 1 which are continuous over the upper and lower stages of the head are laid, and jack-up and jack-down are performed. By repeatedly removing the spacer member 40 and the subgrade spacer member 41 interposed between the elevator 9 and the bracket 35 alternately, a transport device on a subgrade with a drop, which was conventionally impossible, was used. Box culverts can now be laid. In particular, by sequentially removing the plurality of spacer members 40 and 41, it is possible to lay with good stability using a conventional transport device having a short jack stroke.

[0027]

According to the present invention, the following effects can be obtained.

(A) It is possible to lay a box culvert using a transfer device on a subgrade having a step, which has been impossible in the past, and it is possible to further spread such a transfer device.

(B) By removing the spacer member and the subgrade spacer member interposed between the lifting platform and the bracket alternately, a long jack stroke is not required, and a step using a conventional transport device having a jack stroke is not required. It is possible to lay a box culvert on a roadbed with a gap.

(C) By using a plate material as a spacer member, complicated work and labor are not required for construction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a transport device used for carrying out the present invention.

FIG. 2 is a side view of the transfer device shown in FIG.

FIG. 3 is a longitudinal side view for explaining the laying method of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view showing a part of a construction procedure of the present invention.

FIG. 6 is a sectional view showing a part of the construction procedure of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Traveling trolley 2 Wheel 3 Drive motor 4 Reduction gear 5 Chain 6 Hydraulic jack 7 Bridge 8 Hydraulic pump 9 Elevating platform 10 Lateral feed device 30 Concrete subgrade 30a Upper subgrade 30b Lower subgrade 31 Rail 32 H steel 35 Bracket 35a Bolt 35b bolt holes 40 spacer member 41 subgrade spacer member B _1, B _2, B ₃ box culverts

Claims (2)

(57) [Claims] 1. A box culvert transport device comprising a traveling vehicle disposed on both sides of a concrete subgrade on which a box culvert is mounted, and a lifting platform provided on an upper portion of the traveling vehicle and elevated by a jack. A method of laying a box culvert on a subgrade having a head,
A rail for a traveling carriage continuous over the upper part and the lower part of the drop part is laid, a plurality of subfloor spacer members on which a box culvert can be placed are placed on the lower part of the installation place roadbed, and the box culvert is provided on the box culvert. After the mounted bracket is supported by the elevator and the traveling trolley is driven to transport the box culvert to the lower installation position, the elevator is jacked down and the box culvert is temporarily placed on the road floor spacer member. After further releasing the contact between the lifting platform and the bracket by jacking down, the mounting position of the bracket is moved upward,
A plurality of spacer members are sandwiched between the same bracket and the elevator, and the elevator is jacked up.After removing the spacer member provided on the subgrade, the elevator is jacked down to perform a box culvert. Placed on a subgrade spacer member, further jack-down the elevator to remove a part of the spacer member sandwiched between the elevator and the bracket, and then jack-up the elevator. After removing the spacer member provided on the subgrade, the lifting platform is again jacked down and the box culvert is placed on the subgrade spacer member. A box culvert laying method characterized by laying a box culvert. 2. The method for laying a box culvert according to claim 1, wherein a plate material is used as said spacer member.