JP2000328636A - Block laying foundation structure and block carrying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry and lay blocks safely and efficiently for large type box culvert or the like. SOLUTION: At both the sides of a concrete subgrade 10, a carriage way passage 12 for a block carrying carriage 11 is formed together with the concrete subgrade 10 in one united body, which is projected out above the concrete subgrade 10 with an interval wider than the width of a block 13 scheduled to be carried. A block 13 is raised by the block carrying carriage 11 traveling along a rail 14 at the top surface of a carrying passage 12 and then carried to a scheduled place for laying and unloaded on the concrete subgrade 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for transporting concrete blocks such as box culverts used in sewage works at a construction site, and more particularly to a transport technique suitable for a case where a box culvert laying surface has a large gradient. .

[0002]

2. Description of the Related Art When laying concrete blocks such as box culverts used as culverts,
The construction method of hanging underground using a crane in an underground space that has been cut open has been widely used.

[0003] However, this method cannot be used for construction in a narrow place where a crane cannot enter or construction under a bridge whose upper surface is covered.

Accordingly, the present applicant has disclosed in Japanese Patent Application Laid-Open No. 9-6010.
No. 1 discloses a laying technique using a box culvert transfer device.

In this laying technique, a box culvert laying work is performed while using a concrete subgrade formed at a construction site as a transport path for mounting a box culvert. Specifically, as shown in FIGS. 6 and 7, rails 92 are laid on both sides of a concrete subgrade 91, and a box culvert conveyance truck 93 is moved along the rails 92 to convey the box culvert 90 to a planned laying place. Then, the laying work is performed by sequentially placing them on the concrete roadbed 91.

The box culvert transporting vehicle 93 includes two right and left traveling portions 94, a block elevating device 95 driven by jacks 99 provided in each traveling portion 94, a drive motor 96, a coupling portion 97 for coupling the traveling portions 94, and It is composed of an operation panel 98 for controlling the entire carriage.

By employing such a laying technique, the box culvert laying work in a narrow place or under a bridge can be performed efficiently and safely.

[0008]

In recent years, the size of box culverts used has tended to increase with the increase in large-scale construction. However, the shape of such large box culverts is limited in terms of transportation or construction. For example, the depth tends to be smaller than the height and the width. In recent years, large box culverts that have been increasingly used include, for example, those having a height of about 4 m, a width of about 8 m, and a depth of about 1 m.

As described above, when laying a large box culvert having a shape having a depth smaller than the height, if a conventional box culvert conveyance cart 93 is to be constructed, as shown in FIG. The center of gravity G7 of the box culvert 70 loaded on the cart 93 is higher than the center of gravity G9 of the conventional box culvert, and the bottom area is relatively small.

[0010] In particular, when the slope of the box culvert laying surface is large, the slope of the concrete subgrade which is the transfer route is large, and the running box culvert transfer truck 93 is running.
The box culvert may fall down in the front-rear direction due to the shaking or vibration of the box culvert 70 or the swinging motion of the box culvert 70 during ascending or descending, and there is a high danger during the work and the box culvert may be damaged.

An object of the present invention is to provide a technique capable of safely and efficiently transporting and laying blocks such as large box culverts.

[0012]

In order to solve the above-mentioned problems, a block laying foundation structure of the present invention is for transporting and laying a block by running a block transport trolley, and is formed on a surface where a block is to be installed. And a transport path for running a block transport trolley formed on both sides of the concrete subgrade and protruding above the concrete subgrade and formed at an interval wider than the block width.

[0013] With this configuration, the block carrier having the block elevating device can travel on the transport path at a high position on both sides of the concrete subgrade.
In both side portions of the block to be conveyed, a position relatively close to the center of gravity of the block can be supported by the block elevating device to move up and down and convey. Therefore, during the lifting work,
The stability of the block during transportation is improved, and a block such as a large box culvert can be safely and efficiently transported and laid.

Here, by integrally forming the concrete subgrade and the transport path, the strength near the block laying surface is increased, so that cracks and settlements after the block is laid can be prevented.

[0015] The block transport method of the present invention is a block transport method using the above-described block laying foundation structure, wherein the block transport method protrudes higher than the concrete subgrade on both sides of a concrete subgrade formed on a block installation surface. A step of forming a transport path for block transport trolleys at intervals greater than the block width, and using a block transport trolley that can travel along the transport path with a block elevating device,
A step of elevating the block with the block elevating device, a step of moving the block transport trolley along the transport path with the block raised to the installation location, and elevating the block after the block transport trolley arrives at the installation location. Lowering the block with an apparatus and placing the block on a concrete roadbed.

By taking such a process, the center of gravity of the block on both side portions of the block to be transferred can be obtained by using a block transfer truck with a block lifting / lowering device that travels on a transfer path at a high position on both sides of the concrete subgrade. Can be supported by a block lifting / lowering device to lift / lower / convey. Therefore, during the lifting operation, the stability of the block being transported is improved, and a block such as a large box culvert can be transported and laid safely and efficiently even when the slope of the box culvert laying surface is large.

[0017] Support members are detachably mounted on both side surfaces of the block to be transported, and the block is moved up and down and transported by engaging the block elevating device of the block transport trolley with the support member, thereby moving the block through the support member. Since it is possible to ascend and descend while being supported, it is possible to prevent block damage due to direct contact with the block elevating device. In addition, since the left and right sides are supported, the stability during transportation is high during lifting and lowering work, and after the block is installed, the support member can be removed from the side of the block, affecting the various works after placing the block. Nor. It is to be noted that an L-shaped steel or the like is preferable as the support member, and a system in which such a support member is bolted to both side surfaces of the box can be adopted.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of the transport state of the block viewed from the front side, FIG. 2 is a side view of the block viewed from the left side of FIG.
FIG. 3 is a side view showing a part of FIG.

As shown in FIGS. 1 and 2, a concrete subgrade 10 is formed on the block installation planned surface, and a transport path 12 for running a block transport vehicle 11 is formed on both sides of the concrete subgrade 10. . The transport path 12 projects higher than the concrete subgrade 10 and is spaced apart from the block 13 to be transported at a wider interval than the concrete subgrade 1.
0 and are formed integrally.

A rail 14 is provided on the upper surface of these transport paths 12.
The blocks 13 are conveyed to a place where the blocks are to be laid by reciprocating the block transport cart 11 along the rails 14, and the blocks 13 are sequentially placed on the concrete subgrade 10 to perform the laying work.

The block transporting trolley 11 rotates left and right traveling units 15 moving on rails 14, a block lifting / lowering device 17 operated by jacks 16 provided on each traveling unit 15, and wheels 24 of the traveling unit 15. It comprises a motor 18, a connecting portion 19 for connecting the running portions 15 to each other, and an operation panel 20 for controlling the entire bogie.

The block 13 to be transported is located between the transport paths 12, and a support member 21 made of L-shaped steel is horizontally mounted on both left and right sides thereof. The support member 21 has a bolt hole 23 formed in the side surface of the block 13.
And is detachably fixed by a bolt 22 screwed into the connector. The block 13 has a height of 4 m, a width of 8 m, and a depth of 1 m, and has a shape that is higher than the depth.

Next, with reference to FIGS. 3 to 5, a block transfer process using the block transfer cart 11 will be described.

The traveling section 15 of the block carrier 11 is positioned to the left and right of the block 13 to be transported, the block elevating device 17 is raised to contact the support member 21, and then the block 13 is further raised. Lift from concrete subgrade 10.

Thereafter, as shown in FIGS. 3 and 4, the block 13 is transported forward along the transport path 12 while the block 13 is lifted, so that the block 13 is transported to the location where the block is to be installed. I will do it.

When the block carrier 11 arrives at the place where the block is to be installed, the block lifting device 17 is lowered to lower the block 13, and the block 13 is placed on the concrete subgrade 10.

When the block elevating device 17 is further lowered after the block 13 is placed, the block elevating device 17 is detached from the support member 21 as shown in FIG. 5, so that the block carrier 11 can be moved. Thereafter, if the bolts 22 are loosened and the support members 21 are removed from both side surfaces of the block 13, the installation work of the block 13 is completed.

The block transport cart 11 with the block 13 lowered is moved back along the transport path 12 and returned to the block loading position, so that the next block transport operation can be started.

As described above, the block trolley 11 is reciprocated along the transport path 12, the block 13 is transported to the place where the laying is to be laid, and the block 13 is sequentially placed on the concrete roadbed 10, thereby proceeding with the laying work. You can go.

In the present embodiment, the block carrier 1
1 is located on the transport path 12 at a high position on both sides of the concrete subgrade 10, and the block lifting / lowering device 17 supports the position relatively close to the center of gravity G13 on both side portions of the block 13 to lift and lower and transport the block 13. can do. Therefore, even a block 13 having a relatively large size and a height higher than the depth can be moved up and down and transported in a stable state, and as shown in FIG. Block 1 even if is large
3 can be safely and efficiently transported and laid.

The concrete roadbed 10 and the transport path 12
Is about 18% of the height of the block 13, so that the material and labor required for the work of forming the transport path 12 are suppressed relatively small, and the large block whose center of gravity is relatively high is suppressed. 13 can be transported in a stable state, and there is no hindrance to construction after installation. In this embodiment, even in the case where the slope S of the box culvert laying surface is a steep slope exceeding 10%, it was possible to convey in a stable state.

Since the concrete subgrade 10 and the transport path 12 are formed integrally, the strength near the laying surface of the block 13 is high, and the occurrence of cracks and settlements after laying the block can be prevented.

Since the block 13 is moved up and down via the support members 21 which are detachably mounted on both sides of the block 13, damage to the block 13 due to direct contact with the block elevating device 17 can be prevented. After the installation, the support member 21 can be easily removed from the side surface of the block 13, so that there is no influence on various works after the block is placed.

In this embodiment, the height is 4 m,
Although an example in which a relatively large block 13 having a width of 8 m and a depth of 1 m is transported and laid is described, the present invention is not limited to this, and is used for transporting and laying blocks of other shapes and sizes. Can be widely adopted.

[0035]

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

(1) By forming a transport path for running a block transport trolley at both sides of a concrete subgrade formed on a block installation scheduled surface at a distance higher than the concrete subgrade and at an interval wider than the block width. Since the block transport trolley with the block elevating device can run on the transport path located at the high position on both sides of the concrete subgrade, the position relatively close to the center of gravity of the block on both sides of the block to be transported is set by the block elevating device. It can be lifted and lowered while being supported. Therefore, the stability of the block during the ascent and descent is improved, and the large block can be safely and efficiently conveyed and laid even when the slope of the box culvert laying surface is large.

(2) By integrally forming the concrete subgrade and the transport path, the strength near the block laying surface is increased, so that the occurrence of cracks and settlements after block laying can be prevented.

(3) Support members are detachably mounted on both side surfaces of the block to be transported, and the block lifting / lowering device of the block transport trolley is engaged with the support member to raise and lower the block, thereby transporting the block. As a result, the block can be raised and lowered and transported, so that block damage due to direct contact with the block lifting and lowering device can be prevented. In addition, since the left and right sides are supported, the stability is high during ascent and descent, during transportation, and after the block is installed, the support member can be removed from the side of the block, which may affect various works after placing the block. Absent.

[Brief description of the drawings]

FIG. 1 is a perspective view of a transport state of a block according to an embodiment viewed from the front side.

FIG. 2 is a side view as viewed from the left side of FIG.

FIG. 3 is a side view showing a part of FIG.

FIG. 4 is a front view illustrating a transport state of blocks according to the embodiment.

FIG. 5 is a front view illustrating a transport state of blocks according to the embodiment.

FIG. 6 is a perspective view of a state in which a conventional box culvert is laid, as viewed from the front side.

FIG. 7 is a side view as viewed from the left side of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Concrete roadbed 11 Block transport trolley 12 Transport path 13 Block 14 Rail 15 Traveling part 16 Jack 17 Block elevating device 18 Motor 19 Connecting part 20 Operation panel 21 Support member 22 Bolt 23 Bolt hole 24 Wheel

Claims (4)

[Claims] 1. A block laying foundation structure for transporting and laying a block by running a block carrier trolley, comprising: a concrete subgrade formed on a block installation planned surface; and a concrete subgrade on both sides of the concrete subgrade. A block laying basic structure, comprising: a block-carrying truck traveling conveyance path that protrudes higher than a roadbed and is formed at an interval wider than a block width. 2. The block laying foundation structure according to claim 1, wherein the concrete subgrade and the transport path are integrally formed. A step of projecting higher than the concrete subgrade on both sides of the concrete subgrade formed on the block installation scheduled surface and forming a transport path for running the block transport vehicle at an interval wider than the block width; A step of raising a block with the block lifting device using a block transport vehicle that can travel along the transport path with a block lifting device, and moving the block transport vehicle along the transport path with the block raised. And moving the block to the installation location, and after the block transport vehicle arrives at the installation location, lowering the block with the block elevating device and placing the block on the concrete subgrade. Block transfer method. 4. The block transport according to claim 3, wherein support members are detachably mounted on both side surfaces of the block, and the block lifting / lowering device of the block transport trolley is engaged with the support member to lift and lower the block. Method.