JPS60246993A - Method and apparatus for propelling underground pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] A. Purpose of the Invention Industrial Field of Use Scope of use of tunnels built underground, roadways, sidewalks, pedestrian paths, waterways, public ditches, and protective facilities in the event of an emergency. is extremely thick.

Vertical technology The standard conventional method of arranging three or more cylinders in a vertical line and advancing each cylinder into the ground one after another to the desired position is (1) propulsion method and ( There are 2) towing method and (3) towing propulsion method. Among the methods (1) and (2) above, the facepiece advancing methods are fundamentally different from the method of the present application, so a description thereof will be omitted. Since the method of the present application belongs to the field of the above-mentioned (3) traction propulsion method, the standard conventional method related to (3) will be described. That is, the propulsion jack is fully installed between the first to third cylinders, the traction member is inserted through all the cylinders, and the jack is attached and detached to the end of the traction member at the front of the first cylinder. Using a device configured by attaching a towing jack having a freely removable fixing device, and attaching all detachable fixing devices to the traction member so as to be latched to the rear of each cylinder from the third cylinder onwards, , each fixing device was fully opened or fixed, and the propulsion jack or traction jack was operated and opened as appropriate to advance each cylinder one by one step length starting from the first cylinder, so that all the cylinders moved forward by one step length. If so, go back p1 and do the above method,
From now on, this method will be repeated. The above method is a basic standard method, and there are other similar methods, but they are all the same.

Problems to be Solved by the Invention The drawbacks of the conventional methods described above are that in order to reduce the number of expensive propulsion jacks and to improve work efficiency and reduce construction costs, the stroke length of the jack piston has been lengthened. As a result, the length of each cylinder becomes longer, and as a result of the longer length of the cylinder, if you try to move the cylinder in this state, you will have to do a lot of digging, and you will have to do a lot of digging. As a result, an uncertain space is created between the outer peripheral surface of the cylinder and the ground, making it impossible to reliably support the reaction force when the jack is activated, and therefore making it difficult to make a turn. Of course, it is possible to curve the cylinder by making it shorter, but that would be uneconomical and can be said to be an inappropriate method in terms of construction costs.

1. Means for solving the structural problems of the invention In order to solve all the above-mentioned problems, the present invention uses a low-cost elastic hollow pressure member at the side instead of an expensive propulsion jack, and a single The length of the cylinder is shortened according to the radius of curvature during bending, and the forward direction is changed little by little to move forward.As the length of the cylinder is shortened, there is almost no need for extra trenching, and therefore the pressure member and traction jack are reduced. The above-mentioned problems have been solved by being able to reliably support the reaction force during operation and moving forward along a predetermined curve economically and reliably and almost accurately.

Function To describe the function of the method of the present application in more detail, when the cylinder moves straight, all the pressure generating equipment between the first and second cylinders are operated to the same pressure to advance the first cylinder. The reaction force generated at this time is of course supported by the total force of the frictional force between the outer peripheral surfaces of the second and third cylindrical bodies and the ground.

Next, the pressure fluid in the pressure member in the total pressure generation equipment is allowed to flow out from the flow pipe, and the fixing devices at the front part of the first cylinder and the rear part of the third cylinder are fixed to each cylinder. The second cylinder is locked via a traction member, and all the pressure generating equipment between the second and third cylinders is operated to the same pressure, so that the second cylinder is fully advanced. Next, the pressure fluid in the pressure member in the total pressure generation equipment between the second and third cylinders is made to flow out through the flow pipe, and the traction jack is operated to transfer the reaction force generated to the first , the third cylinder is moved forward while being supported by the second cylinder. To advance the cylinders from the fourth cylinder onward, fix all the fixing devices of the towing jack, fix the fixing device at the rear of the cylinder to be moved forward, and lock it to the cylinder.
The other fixing devices are released, the traction jack is fully operated, and the generated reaction force is supported by the first to third cylindrical bodies and moved forward, respectively.

By repeating the above method, the cylinder group is advanced to a predetermined position underground.

Next, if the advancing line is partially straight, partially curved, or entirely curved, the cylinder must be curved along the entire line. In order to accomplish all of this, the most important thing is to shorten the length of the cylinder and to displace the cylinder in small increments, as described above. Directions of the first and second cylinders? In other words, the third and subsequent bodies move forward along the forward path using the forward path as a guide, so it is sufficient to accurately displace the first and second cylindrical bodies in the forward direction. For this purpose, in this application, the cylindrical metal is shortened according to the radius of curvature of the curve,
It is a comb that facilitates directional displacement work. By doing so, it is possible to almost eliminate the amount of unnecessary excess trench, and the reaction force can be supported reliably. Next, in order to move the cylinder forward while changing its advancing direction, the cylinder may be pushed or pulled unbalancedly. In this application, the first and second cylindrical bodies can be displaced left and right, up and down, and in any direction (
(including direction adjustment metal), the pressure generating equipment installed interveningly between each of the first to third cylinders is placed at a position symmetrical to the vertical line and horizontal line passing through the center of the cylinders, and has the same capacity. This was made possible by installing pressure generating equipment. That is, to explain it specifically, in order to displace the first cylinder to the right when viewed from the entire plane, pressurized fluid is applied to all the pressure members disposed on the outside of the curve to the right side, that is, all the parts on the inside of the curve. By sending a larger amount of flow than the pressure member to increase expansion, it is possible to move forward while easily moving to the right. The directional displacement operation of the second cylinder can be carried out in the above-described manner from when the front part of the second cylinder reaches the position before the first cylinder moves forward.

In addition, for the third cylinder and the following cylinders, if each cylinder is towed by making the traction force of the traction jack installed on the outside of the curve larger than that of the one on the inside, each cylinder will be pulled by the first and second cylinders. It can move forward in a smooth curve along the path of its body.

In this way, according to the method of the present application, the cylinder group can be freely advanced, such as straight forward or curved forward movement, or pressure adjustment in the forward direction.

Example Hereinafter, one embodiment will be described based on the drawings.

Figures 1 to 4 are enlarged views mainly showing the device between the first to third cylindrical bodies, and partially showing the advancement method.
Figure 2 is a cross-sectional view taken along line A-A in the figure, and Figure 2 is a cross-sectional view taken along line B-B in Figure 1. Both Figures 1 and 2 show the case where the cross section of the cylinder is planar. , and FIG. 3 corresponds to FIG. 2 in the case of a circular shape. FIG. 4 shows a plan cross-sectional view of the first cylindrical body moving forward as it is displaced to the right at a displacement angle a;
FIG. 10 is a process side view showing a method of moving the cylinders straight when the cylinder group consists of five cylinders.

First cylinder 1N, second cylinder 1! And between each cylinder of the third cylinder, there is a hollow pressure member 21.2 each having one to several pieces of elasticity.
A group of pressure generating equipment consisting of a flow pipe 3+, which is directly connected to the hollow part and sends or discharges pressure fluid, is installed in each case. The arrangement positions between the cylinders of the pressure generating equipment for each of these several times are arranged symmetrically with respect to a vertical line 8 and a horizontal line 9 passing through the center of the cylinders. In the embodiment shown in FIGS. 1 to 3, one group of pressure generating equipment consists of one pressure member and one flow pipe, and four groups of pressure generating equipment, one group each. This figure shows the case where .

Next, all the cylinders from the first cylinder II onwards are inserted into the separation member 4.
A traction jack 6 having a removable fixing device 5 is attached to the end of the traction member 4 at the front part of the first cylinder body 11, and the rear part of the third cylinder body and below. At the rear of each cylinder, a removable fixing tool 5 is attached to the separating member 4 so as to be locked to the respective cylinder during fixing, and a protective cylinder 7 is installed between each cylinder at the front and rear of each cylinder. The entire device is configured by passing it over and attaching it. Next, the fifth method for advancing the cylinder group.
This will be explained with reference to FIGS. The figure shows the case of straight movement. First, all the fixing devices 5+ and 5g are released, and the flow pipe 3 is connected to the entire pressure member 2I between the first and second cylindrical bodies 1+ and lz.
Pressurized fluid is fed from N to inflate all the double pressure members to the same thickness, and the first cylindrical body II is advanced by the inflated thickness (Fig. 5). Next, the pump and valve (not shown) at the base of the flow pipe 31 are fully released to allow the pressure fluid to return, and the fixing tool 5I attached to the towing jack and the third cylindrical body 1
8, the first and third cylinders 1K and h are fully connected via the towing unit 4, and the second and third cylinders 1 are fixed.
Pressure fluid from the flow pipe island to the entire pressure member between G and 13? The entire pressure member 2t' is inflated to the same thickness, and the second cylindrical body 1! Advance by the full expanded thickness (Figure 6). Next, the second
The entire pressure fluid in the pressure member 22 between the third cylindrical body 11 and ls is made to return from the flow pipe island, and the traction jack 6 is operated to move the third cylindrical body 18 between the first and second cylindrical bodies. II, 1! (Figure 7). Next, the towing jack 6 and the fixing device 5 are replaced and fixed, and the fixing device 5 is placed between the third and fourth cylinders 13 and 14! Fully release the fixing tool between the fourth and fifth cylinders5. Once fully fixed, the traction jack 6 is operated to advance the fourth cylinder 14 by the forward movement length of the first cylinder 11 (Fig. 8).Then, the movement of the fifth cylinder 18 is as follows.
Just follow the way your body moves forward (Figure 9).

The above-mentioned advancement method is a follow-up in which the length of each cylinder from the fourth cylinder 14 onwards is the same as the length of advancement up to the third cylinder. Since the stroke length of the piston of the vertical traction jack 6 can be extremely short, the jack has the advantage of being inexpensive and easy to handle. On the other hand, however, there is a disadvantage that operations such as repositioning the jack, releasing the fixing tool, fixing, etc. must be performed more often than in the case where the stroke length of the piston is made longer. In order to avoid this, FIG. 10 shows a method of advancing the cylinders from the fourth cylinder 14 onward by increasing the length of one movement. That is, six long-stroke traction jacks are used, and the first to third cylinder bodies l111! , 18 as one group, the third cylindrical body I
The advancing method up to S is repeated several times, and when the advancing length of the cylindrical body group reaches the stroke length, the fourth cylindrical body 14 is advanced by the stroke length. The same applies to the advancement of the fifth cylindrical body 1B.

Although this method has the disadvantage that the traction jack is long, large, and expensive, it has the advantage that the work of advancing the fourth and subsequent cylinders is simplified. This advantageous effect increases as the number of cylinders increases.

Next, the curvature of the cylinder, which is the object of the present invention, will be described.

As shown in FIG. 4, in order to move the cylinder to the right, the expansion thickness of the entire pressure member 2I, which is disposed on the left side between the first and second cylinders 1+ and It, must be By adjusting the amount of pressure fluid sent through the flow pipe 3I and feeding the pressure fluid so that the thickness becomes larger than the expansion thickness of the entire pressure member 2I disposed on the right side, the pressure fluid is sent to the first cylindrical body II. moves forward while moving the forward direction to the right by the displacement angle a. Next, although not shown, the pressure fluid is made to return from the flow pipe 3I, and the pressure fluid is applied to the pressure member 2I between the second and third cylindrical bodies S and LA. By performing a method similar to that described above, the second cylindrical body 12 follows the first m-th body II and changes the displacement angle a.
Move forward while being displaced. The third cylindrical body moves forward by adjusting the operating stroke length of the left and right traction jacks 6 to move forward while changing direction to follow the front cylindrical body.

In the above, it is desirable to make the cylinder as short as possible, to make the displacement angle a small, and to move the cylinder in small steps.

As is clear from the above, the cylindrical body is advanced by a straight-line method for straight portions and by a curved method for curved portions.

The forward reaction force of the cylindrical body to be moved forward is supported by the total force of the frictional force between the remaining outer peripheral surface of the cylindrical body and the ground.

Of course, earth and sand, ground water, etc. are removed from between each part of the protective tube 7. C1 Effects of the invention By the present invention, the underground bending of the tube group, which is a difficult problem with the American construction method mentioned above, can be avoided by shortening the length of the tube, and By installing an inexpensive hollow pressure member made of elastic metal between the first to third cylindrical bodies, it is possible to eliminate the excess hole and displace each cylindrical body in small increments, economically and reliably. , can be easily advanced, and this effect is extremely large.

The present invention has been described in detail with reference to the embodiments above, but of course the present invention is not limited to the described embodiments, and the design may be modified within the scope of the invention.

[Brief explanation of drawings]

1 to 3 are enlarged views of the first to third cylindrical portions of the embodiment according to the present invention. 1 is a sectional view taken along line B-B in FIG. 1, FIG. 3 is a sectional view of another embodiment, FIG. 4 is a plan sectional view of yet another embodiment, and FIGS. 5 to 10 are still another embodiment. FIG. 3 is a process side view showing a method of advancing the cylinder group. Sign II + b + In + 1+, Is° simplified 2+
, 2e......Pressure device 3+, 3x
.........Feed pipe 4...
... Traction member 5+, 52...
・Fixing device 6 ・・・・・・・・・・・・・・・ Towing jack 7 ・・・・・・・・・・・・・・・ Protection Simple 8 ・・・・・・・・・・・・・・・Vertical line 9・・・・・・
・・・・・・・・・Horizontal line a・・・・・・・・・・・・
Displacement angle (1 other person) NoH @ Ji21

Claims (1)

[Claims] (1) Regarding a method for sequentially advancing three or more cylinders arranged in a column into the ground, an elastic force is applied between the first, second, and third cylinders from the front. A group of pressure generating equipment consisting of one or more hollow annular or elliptical pressure members and attached to all pressure members of the fluid flow pipe is changed in the forward direction of the cylinder to self-pressure. The traction member is interposed multiple times at appropriate locations between each cylinder so as to allow the traction member to be inserted through the first cylinder and all the cylinders below it, and is attached and detached at the front of the first cylinder. A towing jack having a removable fixing device is attached to the end of the towing member, and a detachable fixing device is attached to the towing member at the rear of the third cylinder and the rear of each of the subsequent cylinders, and each cylinder Attach a protective cylinder between them to configure the cylinder advancement device, release the fixing device attached to the traction jack first, and connect the pressure member of the pressure generating equipment between the first and second cylinders with the flow pipe. The pressure fluid is fully pumped, the pressure member is expanded, the reaction force at that time is received by the second and third cylinders, and the first
The cylinder is advanced, and then the fixing device and the fixing device at the rear of the third cylinder are all fixed, and the pressure fluid in all the pressure members between the first and second cylinders is returned from the flow pipe. , second,
Fully pumping the pressure fluid from the flow pipe to the pressure member of the pressure generation equipment between the third cylindrical body, causing it to expand, causing the third and first cylindrical bodies to receive the reaction force at that time, and advancing the second cylindrical body, Next, the pressure fluid in the pressure member is returned from the flow pipe, the traction jack is operated, and the reaction force is received by the first and second cylindrical bodies, and the third cylindrical body is moved into the first and second cylinders. The three cylinders are moved forward approximately the same distance as the two cylinders, and the above method is repeated to advance the three cylinders into the ground one after another. When the number of cylinders is four or more, the cylinders from the fourth cylinder onwards are towed forward by the traction jack operation in the same way as the third cylinder is advanced, and the three or more cylinders are advanced into the ground. A method of advancing an underground cylinder characterized by the following. (2) The method for advancing an underground cylinder according to claim (1), wherein the length of the cylinder is determined according to the radius of curvature of the cylinder advancement curve. (3) The underground cylinder according to claim (1), wherein the arrangement of the pressure generating equipment between the cylinders is symmetrical with respect to a vertical line and a horizontal line passing through the center of the cylinder. How to move forward. (4) In the advancement of the cylinder, in the case of straight movement, the underground cylinder according to claim (1), in which pressure fluid of the same pressure is sent to all pressure members of all pressure generating equipment to advance the cylinder. How to move forward. (5) When moving the cylinder forward in a curved direction, adjust the pressure or pressure flow of the pressure fluid so that the expansion of the pressure member located outside the curve is greater than that of the pressure member located on the inside of the curve. A method for advancing an underground cylindrical body according to claim (1), in which all two cylindrical bodies are moved forward. (6) From the front of three or more cylinders arranged in a column, the first to
Between each cylindrical body of the third WI body, a group of pressure generating equipment consisting of one or more elastic hollow pressure members and a fluid flow pipe attached to the pressure members is installed so that the cylindrical body can move forward. In order to freely change the direction, the first cylinder is interposed multiple times at an appropriate position between each cylinder, and the first cylinder and all the cylinders below it are fully inserted to completely dispose the first cylinder. A towing jack having a detachable fixing device at the front part of the cylindrical body is attached to the end of all the traction members, and is latched to the rear part of the third cylindrical body and the rear part of each of the cylindrical bodies below it. An advancement device for underground cylindrical bodies, which is equipped with a removable fixing device and a protective tube between each cylindrical body. (7) The underground cylinder advancing device according to claim (6), wherein the pressure member has an annular planar shape. (8) The underground cylinder advancing device according to claim (6), wherein the pressure member has an elliptical planar shape. (9) The underground cylinder advancing device according to claim (6), wherein the pressure member has a donut-like planar shape. (6) The multiple positions of the pressure generating equipment disposed at appropriate positions between the cylinders are symmetrical with respect to the vertical line and the horizontal line passing through the center point of the cross section of the cylinder. 6) The advancement device for the underground cylindrical body described in section 6).