JP4603434B2 - Propulsion pipe propulsion method and apparatus - Google Patents

Description

  The present invention relates to a propulsion method and apparatus for a propulsion tube, and more particularly, a propulsion method and an apparatus for propulsion that can easily and efficiently promote a standard length propulsion tube even in a small start shaft. It relates to the device.

  As a method of laying pipes such as sewers, not only the construction cost is low, but also a propulsion method with a small construction area is widely used. And this propulsion method starts the semi-shielded machine from the start shaft and excavates the side hole, and pushes the connection pipe into the side hole and connects it with the main push jack installed in the start shaft. It is supposed to lay a fence. The start shaft in the above propulsion method is generally constructed of sheet piles, liner plates, concrete secondary products, steel pipes, etc., and the cross sectional dimension of the start shaft is almost the same as the diameter of the propulsion pipe propelled. The length in the propulsion direction is determined by adding the length of the main push jack, the length of the propulsion pipe, the thickness of the reaction force body, and the like, and adding a slight margin.

  By the way, when the start shaft is built on the road, when the general occupation length cannot be secured due to the road width or traffic conditions, or the start shaft construction period cannot be secured for a long time In such cases, the exclusive space of the start shaft cannot be increased. For this reason, if it is unavoidable that the space for exclusive use of the start shaft is to be reduced and pipes must be laid, a small start shaft can be constructed with a small diameter steel pipe, and the inside of the start shaft Install a short push-in jack at the bottom, carry the propulsion pipe from the ground while carrying it in the start shaft, insert the tip into a side hole that has been excavated in advance, and the rear end of the propulsion pipe A strut is appropriately inserted between the main push jack and the propelling pipe is sequentially pushed and connected by the main push jack to lay the pipe rod.

  However, in this conventional example, a small start shaft is constructed by a small-diameter steel pipe, so that the work space in the start shaft is inevitably narrow, and a strut is inserted with a short push jack of the captain. As a result, the propelling pipe must be propelled while wearing, and the propulsion work for the propelling pipe is very troublesome and time-consuming, which not only results in extremely poor work efficiency, but also increases the construction cost. Even in the case of carrying in the starting shaft, it is easy to interfere with the main pushing jack, and the carrying-in operation is very difficult.

  In order to solve the problems of the conventional example, Japanese Patent Application Laid-Open No. 10-176482 discloses a main push jack that is pivotally attached to the bottom of a small start shaft having a required depth via a reaction force body. And a propulsion device for the propulsion pipe comprising a table disposed below the main push jack for placing and supporting the propulsion pipe, and a strut and a push ring interposed between the main push jack and the propulsion pipe. It is disclosed.

In the propulsion device described in Japanese Patent Laid-Open No. 10-176482 configured as described above, the main pushing jack is swiveled in the direction of the inner peripheral surface of the starting shaft, and the work space is secured above the table. After that, the propulsion pipe is suspended from the ground and is carried into the start shaft and is placed and supported on the table. After that, the main push jack is swung to match the propulsion direction of the propulsion pipe, and the push pusher and the strut are inserted between the rear end of the propulsion pipe and the propulsion pipe is operated sequentially. They are pushed in and connected, and pipes are laid.
Japanese Patent Laid-Open No. 10-176482

By the way, the propulsion device for a propulsion pipe described in JP-A-10-176482 has a main push jack pivoted in the direction of the inner peripheral surface of the start shaft when the propulsion tube is suspended while being suspended in the start shaft. The work space above the table can be secured, and the propelling pipe can be carried in relatively easily even in a narrow start shaft.
However, since the main pushing jack is pivotally attached to the start shaft through the reaction body, the main pushing jack can obstruct the work space above the table. Not only is it impossible, but the captain of the original push jack itself cannot be set too long. For this reason, in order to push the propelling tube and propel it, it is inevitably necessary to interpose a strut. Further, since the main push jack is appropriately swung as required, the work is not only very troublesome, but there is a problem in durability, and similarly, struts are appropriately inserted. Therefore, the intervention / removal work is very troublesome and troublesome, and not only the propulsion work efficiency is poor as a whole, but also the construction cost is increased.

  The present invention solves the above-mentioned problems of the conventional example, and not only can the propulsion pipe be easily carried into a small vertical shaft to carry out the propulsion work, but the propulsion pipe is very It is an object of the present invention to provide a propulsion method and apparatus for a propulsion pipe that can lay a pipe rod while being pushed and connected efficiently and securely.

In order to achieve the above object, according to the first aspect of the present invention, a starting shaft is constructed to a depth equal to or lower than the propulsion level of the propulsion pipe, and an original support member is provided on the bottom of the starting shaft. Install the push jack so that it can be raised and lowered, and install the propelling pipe support sheath pipe with the guide member inside the starting shaft at the propulsion level of the propelling pipe, and then lower the main push jack below the sheath pipe level. While securing the space for carrying the propulsion pipe, carry the propulsion pipe from the ground into the start shaft and insert it into the sheath pipe while being guided by the support member and guide member , and then raise the main push jack. The propulsion method of the propulsion tube is characterized by propelling the propulsion tube along the sheath tube.

The invention described in claim 2 is a propulsion device for pushing a propelling pipe that can be installed in a starting shaft having a required depth, and communicates with the side wall of the starting shaft in order to support the propelling tube in the propulsion direction. A propulsion device for a propulsion pipe comprising a sheath tube that can be freely installed, wherein the propulsion unit has a main push jack installed on a required base so as to be movable up and down via an elevating means . A support member is provided above the propellant tube to be inserted into the sheath tube in a guide shape toward the propulsion direction, and a guide member is provided inside the sheath tube to guide the propulsion tube in the traveling direction. When the propulsion pipe is carried into the start shaft, the main jack is lowered to secure the carry-in space, and is inserted into the sheath pipe while being guided by the support member and guide member. , At the time of promotion of the propulsion pipe The propulsion tube raised operating the jack, characterized by comprising configured to allowed to promote while along so the sheath tube, it is an gist propulsion device of the propulsion tube.

Since the invention according to claim 1 is configured as described above, when the propulsion pipe is carried into the start shaft, the main push jack is moved downward to release the entire rear side of the sheath pipe, so that the working space is released. Therefore, it is possible to carry in the propelling pipe easily even under a narrow space in the starting shaft. In addition, since the main jack can be raised and lowered, it can be set longer than the conventional example even under the space in the narrow start shaft, and it is possible to set the strut as in the conventional example. while along so the propulsion tube to the sheath tube without allowed to interposed quickly and reliably, yet propelled good working efficiency, not only can allowed to laying pipe culverts with an inexpensive construction costs as a whole, supporting the propulsion tube while allowed guided by members and the guide member easily along the sheath tube, moreover, quickly, and reliably efficiently can allowed to promote operation, moreover, facilitates the center of the preceding propulsion tube and the subsequent propulsion tube Can be securely connected while being concentrically matched with each other.

Since the invention according to claim 2 is constructed as described above, when the propelling pipe is carried into the start shaft, the main push jack is lowered, and the entire rear part of the sheath pipe is released, and the carrying space thereof is released. As a result, the propelling pipe can be carried in very easily without being interfered by the main jack even under a narrow space in the starting shaft. In addition, the main push jack can be operated to descend when the propelling pipe is carried into the start shaft and effectively prevent its interference, so that it can be set to a longer length than the conventional example. As a result, the propelling pipe can be quickly and reliably propelled along the sheath pipe without interposing struts, and the pipe can be installed at a low construction cost as a whole. not only the propulsion tube while allowed guide the support member and the guide member easily along the sheath tube, and quickly, and reliably work efficiently can allowed to propulsion, moreover, the prior propulsion tube and the subsequent propulsion tube The center can easily be concentrically matched and securely connected.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on an embodiment shown in the drawings.

  1 to 7 show an embodiment of the present invention, in which 1 is a small start shaft constructed by a steel pipe having a circular cross section, and 2 is a concrete made up of the start shaft 1 The floor 3 is a propelling-pushing pusher that can be raised and lowered freely on the floor 2, and the depth of the start shaft 1 is the level of the sheath tube 10 at which the top dead center of the propulsion 3 is described later. It is set to the required depth to be positioned at. Reference numeral 4 denotes a base constituting the propulsion unit 3, and reference numeral 5 denotes a multistage main pusher disposed horizontally on the base 4 via a link mechanism 6 so as to be movable up and down by a driving means such as a hydraulic cylinder (not shown). With the jack, the length of the main pushing jack 5 is set longer than that of the conventional example. 7 is a substantially disk-shaped reaction force body attached to the rear end portion of the main push jack 5, 8 is a substantially horseshoe shaped push wheel attached to the front end portion of the main push jack 5, and 9 is a propelling tube 13 described later. It is a pair of guide rollers on both sides attached to the upper end of the front end of the main push jack 5 so as to be supported in a guide shape in the direction of the sheath tube 10. Reference numeral 10 denotes a steel tube sheath tube having a circular cross section that can be installed in the propulsion direction through a lateral hole 11 on one side of the start shaft 1, and the inner diameter and length of the sheath tube 10 are a propulsion tube 13 to be described later. It is set to be slightly larger than that of the first jack 5 and to a predetermined level so as to be located at the top dead center of the former pusher jack 5. Reference numeral 12 denotes two guide rollers which can be disposed at the inner lower end along the longitudinal direction of the sheath tube 10 in order to guide a propulsion tube 13 described later in the propulsion direction. In addition, 13 is a propulsion pipe having a circular cross section, 14 is a wire rope that allows the propulsion pipe 13 to be suspended in the start shaft 1, and the wire rope 14 was separately installed on the ground. It is assumed that it is suspended by a crane (not shown).

Next, the operation of the embodiment configured as described above will be described.
First, a small diameter steel pipe is laid by a known method such as a steel pipe rotary burying method or a steel pipe swing burying method, and a small start shaft 1 having a required depth is built, and the laying position of the sheath pipe 10 and the range of excavation influence at the time of laying The ground will be improved. Next, a plurality of divided sheath pipe members are sequentially carried into the start shaft 1 from the ground, inserted into the ground while being pushed into the ground with a simple jack or the like while excavating the opening at the tip to form the horizontal hole 11, and successively following. These sheath tube members are connected to form the required length of the sheath tube 10. After that, two guide rollers 12 are attached to the inside of the sheath tube 10 along the longitudinal direction thereof, and a starting entrance is attached to the distal end portion of the sheath tube 10 to close the periphery thereof, and the sheath tube 10 is installed. Complete. When the installation of the sheath tube 10 is completed, the propulsion device 3 is installed on the inner bottom of the start shaft 1 as shown in FIG.

  After that, the propulsion pipe 13 is carried into the start shaft 1 and inserted into the sheath pipe 10, and pushed in by the main push jack 5 to be sequentially connected, and the pipe rod is laid.

  That is, first, as shown in FIG. 1, the link mechanism 6 is operated to lower the main push jack 5 to the position of the bottom dead center, and the working space is set behind the sheath tube 10 in the start shaft 1. Secure it. Thereafter, as shown in FIGS. 4 and 5, the propulsion pipe 13 is suspended from the ground by the wire rope 14 and is carried into the start shaft 1 while being guided by the guide rollers 9 and 12. Insert into 10. At this time, the main push jack 5 is moved down to secure the entire rear surface of the sheath pipe 10 in the start shaft 1 as a working space, so that the carrying-in work of the propulsion pipe 13 can be performed very easily and efficiently. In addition, since the propelling tube 13 is inserted into the sheath tube 10 while being guided by the guide rollers 9 and 12, the inserting operation can be easily performed manually. Then, as shown in FIG. 6, when the propelling tube 13 is inserted into the sheath tube 10, the main push jack 5 is lifted and stopped at the level of the sheath tube 10. After that, as shown in FIG. 7, the reaction force body 7 is brought into contact with the inner peripheral surface of the start shaft 1, and the push jack 8 is applied to the rear end portion of the propulsion pipe 13, and the main push jack 5 is operated. The propelling tube 13 inserted into the sheath tube 10 is pushed in and propelled. At this time, since the main push jack 5 can be lowered when the propulsion pipe 13 is carried into the start shaft 1 to effectively prevent the interference, the length of the main push jack 5 is set to be longer than that of the conventional example. As a result, the propulsion tube 13 can be promptly and reliably propelled along the sheath tube 10 without interposing struts, and with good work efficiency. When the propulsion pipe 13 is propelled to a certain length, the operation of the main push jack 5 is stopped, the retraction operation is performed, and the lowering operation is performed to restore the original state.

  When the propulsion operation of the preceding propulsion pipe 13 is completed, the subsequent propulsion pipe 13 is carried into the start shaft 1 and inserted into the sheath pipe 10 in the same manner, and the push ring attached to the tip of the main push jack 5 After passing an electric wire, a signal line, a water supply / distribution pipe and the like from the inner space of 8 through the propulsion pipe 13 and connecting them to the piping of the preceding propulsion pipe 13, they are pushed in by the main push jack 5 to be connected in sequence. At this time, the propulsion tube 13 is pushed along the sheath tube 10 while being guided by the guide roller 12, so that the center of the preceding propulsion tube 13 and the center of the subsequent propulsion tube 13 are always aligned accurately and easily. In addition, it can be reliably connected, and it is possible to effectively prevent turning-up and damage of the packing to be inserted for water stoppage.

  Thereafter, similarly, the propulsion pipe 13 is carried into the start shaft 1 and inserted into the sheath pipe 10, and is pushed in by the main push jack 5 and sequentially connected, and the pipe rod is laid.

  In the above embodiment, the main pushing jack 5 is moved up and down by the link mechanism 6. However, the present invention is not limited to this, and a known lifting means such as a hydraulic jack or a journal jack is adopted. It can be used. Further, the guide rollers 9 and 12 are attached to the main push jack 5 and the sheath tube 10 respectively, but the guide rollers 9 and 12 are not limited to this, and a guide rail or a combination of the guide rollers is also available. A known guide means can be adopted and used. Further, the reaction force body 7 is attached to the main pushing jack 5 and is operated to move up and down synchronously. However, the reaction force body 7 is not limited to this and may be detachably attached to the inner wall of the start shaft 1. is there.

It is a longitudinal cross-sectional view which shows one Example of this invention. It is a front view which shows the propulsion device 3 for a pushing pipe of an Example. It is a front view which shows the sheath tube 10 of an Example. It is a longitudinal cross-sectional view which shows the state which carries in the propulsion pipe 13 of an Example in the starting shaft 1. It is a longitudinal cross-sectional view which shows the state which inserts in the sheath pipe | tube 10, guiding the propulsion pipe | tube 13 of an Example to the guide rollers 9.12. It is a longitudinal cross-sectional view which shows the state which raise | lifted the former push jack 5 of the Example. It is a longitudinal cross-sectional view which shows the state which pushes the propulsion pipe | tube 13 with the main pushing jack 5 of an Example.

1 Start shaft
DESCRIPTION OF SYMBOLS 2 Floor board 3 Propulsion machine 4 Base 5 Main push jack 6 Link mechanism 7 Reaction force body 8 Push ring 9 Guide roller 10 Sheath pipe 11 Side hole 12 Guide roller 13 Propulsion pipe 14 Wire rope

Claims (2)

The starting shaft is built to a depth below the propulsion level of the propulsion pipe, and a push jack with a support member is installed on the bottom of the starting shaft so that it can be raised and lowered, and a guide member is provided inside the starting shaft. Install the propulsion pipe support sheath pipe at the propulsion level of the propulsion pipe, and then lower the main push jack below the sheath pipe level to secure the carry-in space for the propulsion pipe, and move the propulsion pipe from the ground. The propulsion is carried into the starting shaft and inserted into the sheath pipe while being guided by the support member and the guide member , and then the main push jack is lifted to propel the propulsion pipe along the sheath pipe. How to propel the tube. A propulsion unit for pushing the propulsion pipe that can be installed in the start shaft with the required depth, and a sheath pipe that can be installed on the side wall of the start shaft to support the propulsion pipe in the propulsion direction. A propulsion device for a propulsion pipe, wherein the propulsion unit is installed on a required base so that a main push jack can be raised and lowered via an elevating means, and is inserted into a sheath pipe above the main push jack. A support member is disposed to support the propulsion pipe in a guide shape in the propulsion direction, and a guide member is provided inside the sheath pipe to guide the propulsion pipe in the advancing direction. Is inserted into the sheath pipe while being guided by the support member and the guide member while ensuring the carry-in space while lowering the main push jack to bring it into the start shaft. Raise the jack The Umate propulsion tube characterized by comprising configured to allowed to promote while along so the sheath tube, the propulsion tube propulsion device.

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