JP6825468B2 - Sending method - Google Patents

Description

The present invention relates to a delivery method for moving a bridge body to which a hand-rolling machine is attached in the direction of the bridge axis.

As a kind of bridge erection method, a delivery method is known in which a bridge body with a hand-rolling machine is moved in the direction of the bridge axis. The bridge body is sent out in a cantilevered state between the spans of the piers by the sending device. If the span is long, a large bending moment is generated in the bridge body before the bridge body reaches the previous pier, and the bridge body may be deformed or damaged. In order to prevent this, a hand-rolling machine that is lighter than the bridge body is attached to the tip of the bridge body, and the hand-rolling machine is sent out so that it reaches the pier first, and the hand-rolling machine and the bridge body are sent out with both hands held. A feeding method using a hand-rolling machine is adopted (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-108771

However, in the conventional feeding method using a hand-rolling machine, when a parapet is installed on the abutment, there is a problem that the hand-rolling machine needs to be fed at a high position in order to avoid the parapet. The same applies when an existing girder is installed on the pier.

That is, as shown in FIG. 3, first, as Okuridaseru the Tenobeki 11 at a high position, above the abutment 12 and the abutment ₁₃ 1, 13 _2, placed bearing, delivery device, the equipment 14 of the gantry such .. The delivery device by Tenobeki 11 and Hashitai ₁₅ 1, 15 sends ₂ at a high position avoiding the parapet 12a a (S1). After the bridge body 15 ₁ reaches the bridge base 12 (S2), the hand-rolling machine 11 is removed, and the bridge bodies 15 ₁ , 15 ₂ , 15 ₃ are replaced with the bridge body 12 and the pier 13 ₁ by the jack-down method using a hydraulic jack or the like. , installed in 13 ₂ (S3).

If the height of the parapet 12a of abutment 12 is high, resulting in feeding the pier ₁₃ 1, 13 hand caster 11 and Hashitai ₁₅ 1 ₂ For example, in a high position above 5 _m, 15 2, 15 _3. In this case, bearing on the abutment 12 and the abutment ₁₃ 1, 13 _2, delivery device, it is necessary to large-scale equipment of the gantry, and the like. Especially when installing equipment on a pier in a river away from the land, the working radius of the crane becomes large and a large heavy machine is required. Furthermore, in the jack-down construction method the bridge member _{15 1,} 15 2, 15 ₃ little by little ₁₃ 1, 13 every _two piers, for example because the lowering by 10 to 15 cm, labor and time consuming to fall operations.

Therefore, an object of the present invention is to provide a delivery method capable of delivering a bridge body at a low position even if there is an obstacle such as a parapet of a bridge stand or an existing girder on a pier at the delivery destination.

In order to solve the above problems, the present invention presents a feeding method in which a bridge body to which a hand-rolling machine is attached is moved in the direction of the bridge axis, and after the bridge body reaches the final span, the hand-rolling machine is sent to a destination. The step of reattaching the hand-rolling machine to a high position of the bridge body so as not to interfere with the obstacles of the bridge pier or the pier, and after the step, until the bridge body reaches the bridge pier or the pier of the delivery destination. This is a delivery method including a step of sending out the bridge body and installing it on the abutment or the pier of the delivery destination.

According to the present invention, the bridge body can be sent out at a low position even if there is an obstacle such as a parapet or an existing girder at the sending destination. Therefore, the equipment on the abutment and the pier can be reduced, and the descent work of the bridge body is also greatly reduced. In addition, since the bridge body can be sent out at a low position, it is a very safe sending method.

It is a process drawing of the delivery method of one Embodiment of this invention. It is a figure which shows the delivery yard. It is a process diagram of the conventional delivery method.

Hereinafter, the delivery method according to the embodiment of the present invention will be described with reference to the accompanying drawings. However, the delivery method of the present invention can be embodied in various forms, and is not limited to the embodiments described in the specification. The present embodiment is provided with the intention of allowing those skilled in the art to fully understand the scope of the invention by adequately disclosing the specification.

FIG. 1 shows a process diagram of a delivery method according to an embodiment of the present invention. 1 Tenobe _machine, 2 _1, 2 2, _{2 3} bridges body joined, 3 communicating fine, 4 delivery destination _abutment, 5 1, _{5 2} is piers. The abutment 4 is provided with a parapet 4a, which is an obstacle when sending out low. On the upper surface of Hashitai 2 _1, in advance bracket 6 is attached.

As shown in S1, attaching a hand caster 1 through Hashitai 2 _1, 2 ₂ of the previously continuous fine 3, toward the left Tenobeki 1 and Hashitai 2 _1, 2 ₂ from right Figure 1 And send it out. Equipment such as bearings, delivery devices, and pedestals are installed in advance on the abutments and piers. These facilities may be installed by a crane installed on the land portion, or may be installed by a crane installed on the hand-rolling machine 1. The hand-rolling machine 1 and the bridge bodies 2 ₁ and 2 ₂ are sent out at a low position so that the hand-rolling machine 1 interferes with the parapet 4a. Therefore, these facilities can be minimized.

The bearing and feeding devices include, for example, a device that alternately moves a vertical jack (bearing) and a horizontal jack for pushing and pulling (feeding device) like a scale insect, and a combination of a horizontal jack and a sliding block to move the bridge body vertically. A feeding device with a sliding block, a caterpillar type feeding device, or the like that can be replaced with a jack can be used.

As shown in S1, Hashitai 2 ₁ final span L, that when it reaches the one before the pier 5 ₁ of abutment 4, to stop the delivery. In this embodiment, Hashitai 2 ₁ reaches the final span L, more when Tenobe machine 1 reaches the abutment 4, to stop the delivery. Then, as shown in S2, remove the Tenobeki 1 from Hashitai 2 _1, Tenobeki 1 reinstalled in a higher position to Tenobe machine 1 of Hashitai 2 ₁ so as not to interfere with the abutment 4. On the upper surface of Hashitai 2 _1, the bracket 6 for attaching the Tenobeki 1 at a higher position is attached. The hand-rolling machine 1 is attached to the bracket 6 via the connecting structure 3. Bridge member 2 ₁ side end of Tenobeki 1 is lifted by lifting apparatus such as jacking hoist (not shown). One end of the hand-rolling machine 1 on the abutment 4 side is lifted by a crane 7 installed near the abutment 4. Since the vicinity of the abutment 4 is on land, it is easy to arrange the crane 7. Alternatively, it may be jacked up by a hydraulic jack installed on the pier 4.

As shown in S3, feeding by using a device, ₁ Tenobe machine 1 and Hashitai 2 reinstalled in a higher _position, 2 _2, 2 sends ₃ from right in FIG. 1 toward the abutment 4 to the left. By reseated Tenobeki 1 at a high position, to have the same function as setting beam Tenobeki 1, i.e. Hashitai 2 _1, 2 _2, 2 ₃ while maintaining the lower position the hand caster 1 Can create a state in which is temporarily received by the abutment 4. Note that 6a of the bracket 6 indicates a bearing structure to which a compressive load is applied, and 6b indicates a rigid connection or a pin connection to which a tensile load is applied. The method of applying the load to the bracket 6 is the same as that of the setting beam.

As shown in S3, when the hand-rolling machine 1 has passed the abutment 4, the passed portion of the hand-rolling machine 1 is removed. As shown in S4, when the bridge body 2 ₁ reaches the abutment base 4, the delivery is stopped, and the hand-rolling machine 1 and the bracket 6 are removed. Then, lowering the Hashitai _{2 1,} 2 2, _{2 3} by the jack-down method, installing the Hashitai _{2 1,} 2 2, _{2 3} to abutment 4 and pier ₅ 1, _{5 2.} The amount of descent is, for example, 70 cm to 1 m because it is sufficient for the delivery device and the minimum necessary gantry.

FIG. 2 shows a delivery yard 9 when the parapet 8a is on the abutment 8 on the departure side. When the parapet 8a is on the departure side abutment 8, the delivery yard 9 is arranged on the delivery side rather than the departure side abutment 8, and in this embodiment, between the departure side abutment 8 and the first pier 5 _n. .. Then, Hashitai 2 ₁ so as not to interfere with parapets 8a, joining the bridge member 2 ₁ feed yard 9. Are rails on the feed yard 9 cradle installation, the rail traveling truck 10 is provided to be run to support the Hashitai 2 _1.

According to the sending method of the present embodiment, the following effects are obtained. Even if there is a parapet 4a on the delivery destination abutment 4, the bridge bodies 2 ₁ , 2 ₂ and 2 ₃ can be sent out at a low position, so the equipment on the abutment 4 and the piers 5 ₁ and 5 ₂ can be reduced, and the bridge. body _{2 1,} 2 2, _{2 3} of descent operations is also greatly reduced. Further, since Okuridaseru the Hashitai _{2 1,} 2 2, _{2 3} at a low position, the safety is very high delivery method.

After Tenobeki 1 reaches the abutment 4 destination delivery, since reseated Tenobeki 1 at a high position of Hashitai 2 _1, operation is easy to be reseated Tenobeki 1.

Since the upper surface of Hashitai 2 ₁ provided setting beam similar bracket 6, it is easy to work to be reseated Tenobeki 1.

Since the sending yard 9 is provided on the sending side of the starting side abutment 8 and the bridge bodies 2 ₁ , 2 ₂ and 2 ₃ are joined at the sending yard 9, the bridge body 2 even if the parapet 8a is on the starting side abutment 8 ₁ , 2 ₂ , 2 ₃ can be sent out at a low position.

The present invention is not limited to the above embodiment, and can be changed to other embodiments without changing the gist of the present invention.

In the above embodiment, the example in which the obstacle is a parapet of the bridge body has been described, but the obstacle may be an existing girder on a bridge pier or a pier.

In the above embodiment, after the hand-rolling machine reaches the delivery destination pier, the hand-rolling machine is reattached to a high position, but the hand-rolling machine is placed in a high position before reaching the delivery-destination pier. It can also be reattached to.

If there are no obstacles such as parapets on the departure side pier, the bridge body can be sent out from the back side of the departure side pier.

In the above embodiment, the hand-rolling machine is removed from the bridge body and the hand-rolling machine is reattached to the bracket of the bridge body. However, the hand-rolling machine is provided on the bridge body so as to be slidable in the vertical direction, and the hand-rolling machine is provided on the bridge body. It can also be reattached to a higher position.

It is also possible to place a temporary support pier between the pier at the destination and the pier immediately before. In this case, the final span is between the delivery destination pier and the temporary support leg.

In the case of multi-span bridges, the location of the delivery yard is not always near the abutment depending on the local conditions. For example, the delivery yard can be arranged between the 8th pier and the 9th pier.

1 ... Hand-rolling machine 2 ₁ , 2 ₂ , 2 ₃ ... Bridge body 4 ... Bridge 4a ... Parapet 5 ₁ , 5 ₂ , 5n ... Pier 5 _n ... First pier 6 ... Bracket 8 ... Departure side bridge 8a ... Parapet 9 ... Delivery yard L ... Final span

Claims (5)

In the sending method that moves the bridge body with the hand-rolling machine in the direction of the bridge axis,
After the bridge body reaches the final span, the step of reattaching the hand-rolling machine to a high position of the bridge body so that the hand-rolling machine does not interfere with obstacles on the delivery destination abutment or pier.
A delivery method comprising a step of delivering the bridge body until the bridge body reaches the bridge pier or the pier of the delivery destination after the step, and installing the bridge body on the pier or the pier of the delivery destination. The delivery method according to claim 1, wherein after the hand-rolling machine reaches the abutment or the pier of the delivery destination, the hand-rolling machine is reattached to the high position of the bridge body. The delivery method according to claim 1 or 2, wherein a bracket for reattaching the hand-rolling machine to the high position is provided on the upper surface of the bridge body. Provide a delivery yard on the delivery side of the pier or pier on the departure side with obstacles.
The delivery method according to any one of claims 1 to 3, wherein the bridge body is joined at the delivery yard. The delivery method according to any one of claims 1 to 4, wherein the obstacle is a parapet of the abutment, or an existing girder on the abutment or the pier.

Images