JPS5820898A - Method and apparatus for constructing small inner diameter pipe in ground - 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 The present invention relates to a method and apparatus for completely laying a small-diameter pipe in a ground by applying a pipe propulsion method.

Pipe driving methods can be used to install pipe trains, particularly feed and discharge conduits, into the ground. In this case, pipes made of, for example, steel or reinforced concrete are propelled section by section from a construction trench or shaft into the ground through a propulsion station, and the propelled tube rows are moved through a section of pipe fitted at the rear end. is extended continuously. If the propulsion length is increased, intermediate soots are additionally inserted into the tube row.

The pipe propulsion method has proven useful in implementation. However, famous hot springs where it is impossible to walk inside the pipe, or where a pipe with a full diameter is laid where it is narrowly restricted due to the conditions of the standout site during excavation and carrying out earth and sand, making walking and work activities within the pipe extremely difficult. Money runs into various obstacles. In order to make it possible to propel such small tubes, which are difficult to walk through, as accurately as possible and in accordance with the purpose, a control cylinder is provided at the head of the row of tubes to be propelled, which can be swung and It is known to provide a cutting head that can be operated via a remote control (cf. DE 2932279). In this case, a laser beam is emitted from the construction groove to determine the direction of propulsion, and the cutting head is A photodiode of the photocell-receiver is oriented in the direction of the provided photocell-receiver, and the photodiode of the photocell-receiver is coupled via a relay cable to a display device which provides the destination of the laser beam to the receiver. The control cylinder of the head is operated by a pressure hose installed along the tunnel.
This takes place in response to the position notification of the display device from the construction channel via one step.

With this known propulsion device for pipes of small nominal diameter, the excavation of the face and the removal of the excavated earth and sand are accompanied by considerable difficulties. Transport of earth and sand is actually only possible by hydraulic means. If, during propulsion, the tube array hits an obstacle present on the propulsion path E, for example a stray stone, this makes the entire propulsion operation impossible.

The object of the present invention is to improve the tube propulsion method, which is known per se and is considered to be useful, in particular to 1000 rn or less, generally 300 to 80 rn.
It is to be applicable also for laying small pipes with an internal diameter of 0 m, while at the same time avoiding the technical difficulties and economic disadvantages of completely remote-controlled working methods.

This problem is solved according to the present invention as follows. That is, in the pipe propulsion method, first a temporary working pipe with a relatively large inner diameter is propelled into the ground, then this pipe is disassembled again section by section, and replaced by pushing a final pipe row with a relatively small inner diameter. The problem is solved by vomiting.

That is, in this work method, first, a ↓9 work pipe is propelled in accordance with the conventional pipe propulsion method, but the inner diameter of this work pipe is at least suitable for walking inside the pipe, and especially for excavating the face, transporting earth and sand, etc. The size is set to the extent that there is space for carrying out various work processes such as carrying out earth and sand. This makes it possible to use conventional excavators for propulsion work, in particular partial cutting machines with swingable cutter arms, and also to carry out earth and sand removal using conventional feeding means. Become. During the propulsion work, it is possible to gain access to the machinery and equipment present in the face and in the working pipe, so that the pipe propulsion work can be carried out reliably and with high efficiency even under difficult working conditions.

The working pipe that is excavated during the pipe propulsion method provides a building space for propelling the final pipe row, but the inner diameter of this final pipe row is smaller than the inner diameter of the working pipe, and its outer diameter is particularly small. The outer diameter of the ground is approximately equal to the outer diameter of the ground, thereby avoiding the formation of a ground step.

The propulsion of the final tube row after propelling the working tubes can be carried out in a variety of ways. In particular, the final pipe row is similarly erected using the pipe propulsion construction method, with the work pipes being propelled from behind the laid working pipes. In this case, the working pipe emerges into a shaft or construction trench located at the end of the propulsion shaft and is dismantled there section by section. The post-propulsion of each segment of the final tube row is performed at the same propulsion station that previously propelled the working tube. In this case, work can be performed with a relatively small propulsion force.

This is because the propulsion path for the final tube row has already been opened by the propulsion of the working tubes. Since only a small propulsion force is required, a small number of pressure-resistant pipes, especially concrete pipes and reinforced concrete pipes, can be used as the final pipe row. Pressure-sensitive concrete pipes or reinforced concrete pipes lined with ceramic material can also be advantageously rear-propelled.

Moreover, it is also possible to cast the final pipe with cast-in-place concrete. In this case, a formwork device is provided at the end of the propelled working pipe, and the formwork device allows the cast-in-place concrete pipe to be placed at the end of the propelled working pipe at the end of the propelled shaft. The concrete is poured by the dimensions that protrude into the construction work groove or reach shaft, etc. that exist in the area.
And it will be extended for each category.

In the above method, the working pipe is recovered again, so that it can be used again after the pipe laying process is completed. For the reusable and edible nature of the working tubes, in particular the fixed installation of the necessary equipment and working equipment, such as air supply conduits and energy supply conduits, rails for transport vehicles, etc., in the working tubes made of steel tubes. is possible, while the final tube row is formed from particularly thick-walled concrete tubes, as mentioned above. It is advantageous to provide the head of the working tube with a cutting shoe whose angle can be adjusted by means of a hydraulically controlled cylinder, in order to enable directional steering of the tube row.

Sh.

The following is an example of the invention illustrated in the attached drawings.
□Explain the light in detail.

The pipe propulsion work is carried out in a vertical or construction work shaft 10 in a known manner.
It is carried out from In this shaft or construction trench there is a hydraulic propulsion station 11, which is equipped with a number of hydraulic jacks, which are connected to a fixed bearing wall. 12 and transmits the propulsion force via the suppression ring 16 to the row of tubes to be propelled. Such propulsion stations are generally known.

A construction trench or reach vertical shaft 14 is provided in the ground at the end of the propulsion shaft. The direction of propulsion is indicated by an arrow 15.

There is an inner diameter in the ground 16 that is such that walking within the pipe row is no longer possible, or at least it is extremely difficult to walk within the pipe row and to carry and install normal machinery, including excavation equipment and conveying equipment. Assume that a row of pipes is installed. In order to lay a pipe with such a small internal diameter in an economical and technically reliable manner by applying conventional pipe propulsion engineering, we first installed a 17 t working pipe as shown in Figure 1. −
The vertical shaft 1 reached from the construction work groove 10 throughout the entire propulsion path
Promote to 4. The working pipes 17 of the temporary 9 consist of single steel pipes 18, the internal diameter of which is at least sufficient to allow for walking within the working pipes and to accommodate the necessary machinery and equipment. For example, the steel pipe 18 is plugged with an inner diameter of about 1100 mm to 1160 mm, corresponding to an outer diameter of 1200 mm. A cutting head 19 is attached to the head of the working tube 17.
A cutting head is provided which can be swung in any direction relative to the axis of the working tube 17 by means of a hydraulic control cylinder 20, thereby making directional control possible. The inner diameter of the cutting head 19 and the inner diameter of the working pipe 17 connected thereto are such that the cutting head 19 and the working pipe 17 are equipped with an excavator, for example a swingable cutter arm known per se (not shown). It is of sufficient size to carry in and install a partial cutting machine, as well as a conveyor 21 for transporting the excavated earth and, if necessary, a feed device connected to the rear for transporting the earth and sand in the direction of the construction trench 10. In the exemplary embodiment shown, this takes place with a transport vehicle 22 running entirely on rails installed in the working pipe 17.

FIG. 1 shows the working pipe 17t after it has propelled the entire thrust shaft. The cutting shoe 19 has already reached the vertical hole 14
It's coming out inside. The propulsion of the working pipe 17 takes place from the construction working channel 10 in a conventional manner, as already mentioned. In this case, the individual tubes 18 are lowered one after another into the construction work groove 10 and are propelled together with the already laid tube rows in the direction of the arrow 15,
Finally, the working condition shown in Figure 1 is reached. If the propulsion path is long, at least one hydraulic intermediate propulsion station (24M) is inserted in the working tube 17! are doing. This is likewise known in tube pushing methods.

The working pipe 17 is propelled by the full propulsion stroke valve, and when the working state shown in FIG. 1 is reached, the final pipe row 25 is propelled as shown in 2nd C. This pipe bank consists of a single concrete pipe, in particular a reinforced concrete pipe 26, the outer diameter of which is equal to the outer diameter of one of the pipes 18 of the working pipes, and the inner diameter of which is equal to the outer diameter of one of the working pipes 17.
For example, it is smaller than the inner diameter of 500 to 800 mm. Ready-made concrete pipes 26 are introduced one after another into the construction trench 10 and propelled by the propelling station 11 in the direction of the arrow 15. In this case, the cutting shoe 19t-
The working tube 17 is also propelled backwards in the direction of the arrow 15. Therefore, this working pipe is pulled out from the reaching shaft 14,
Here, it is dismantled into sections. That is, the propulsion of the pipe 26 is performed in a working stroke that is simultaneous with the backward propulsion of the working pipe 17 and the extraction stroke into the reaching shaft 14.

Since the working tube 17 is propelled in advance, the propulsion path is already open for the propulsion of the tube bank 25, so that the propulsion of the tube bank 25 can be carried out over the entire thrust path quickly and with relatively low thrust forces. becomes. Since the pipes 26 have the same outer diameter as the pipes 18, there is no need to dig down the ground slightly when transporting and installing the pipe array 25. When the first pipe 26 of the pipe array 25 reaches the landing shaft 14, the pipe laying operation is finished. Subsequently, the working tube 17 is put to other uses. By reusing the working tube 17 and the cutting shoe 19, the necessary working devices can be fixedly provided in the tube 17, 18, so that these tubes together with these devices are formed as one conveying unit. be done.

FIG. 5 shows an embodiment of the invention in which the final tube row is constructed of cast-in-place concrete behind the working tube 17. For this purpose, a mold frame device 28 is provided at the rear end of the working tube 17 in the tube 18 behind this tube, which mold frame device 28 is connected as one structural unit to the end mold frame 29 and the core or inner side. It is equipped with a mold frame 30. This mold frame device 28 slides in the last tube 18 of the working tube 17 on the circumference of the end mold plate 29. A reciprocating hydraulic reciprocating piston mechanism 31 is articulated between the mold frame device 28 and the working tube 17. Furthermore, terminal type frame 29
is connected to at least one concrete supply conduit 52 laid through the shaft 14.

When the working pipe 17 has completed its entire propulsion path according to FIG. In the concrete section, concrete is poured into the molding chamber of the molding device 28 via the conduit '52f. As the concrete placing process progresses further, the working pipe 17 is gradually drawn toward the reaching shaft 14, where it is dismantled section by section. The movement of the working tube 17 in the direction of the vertical shaft 14 takes place in or with the aid of a hydraulic reciprocating piston machine 31, which reciprocating piston machine moves the end mold frame 29. It is supported through the pipe row 27 which has already been concreted. What is the inner diameter of the pipe row 27 that is cast with cast-in-place concrete?
The inner diameter of the inner diameter is also small, and it can be adjusted in various ways by appropriately selecting the inner center or inner mold frame 50.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of a tube propulsion device with a previously propelled working tube; Figure 2 is an operation in which the final tube row is propelled while dismantling the previously propelled working tube. Figure 3, which also shows the process in longitudinal cross-section, shows the final pipe row with cast-in-place concrete. A longitudinal sectional view showing a modified working style for pouring. The code in the figure is 17...Working pipe

Claims (1)

[Claims] 1. In a method of applying the pipe propulsion method to lay all pipes with a small inner diameter in the ground, first, a temporary working pipe (17) with a relatively large inner diameter is propelled into the ground using the pipe propulsion method. The above-mentioned pipe laying method is characterized in that the working pipe is disassembled again in all sections and replaced by pushing a final pipe row with a relatively small inner diameter.2. The working tube (17) k is replaced by a final tube row (25, 27) having a relatively small inner diameter and an outer diameter substantially the same as the outer diameter of the working tube (17). Pipe laying method according to paragraph 1. 5. After propelling the working pipe (17)' over a predetermined propulsion path, the final pipe row (25 pipes (26)'t-working pipe (1
7) Propelling by the same propulsion station (11) at the rear end and simultaneously dismantling a section of the working pipe (17) at the other end of the pipe, according to claim 1 or 2. The pipe laying method described. 4. After the working pipe (17) is propelled, the working pipe is dismantled section by section from one end, and replaced at the other end by a final row of pipes cast with concrete on site. A pipe laying method according to claim 1 or 2. 5. The working pipe (17) propelled through a predetermined propulsion path is propelled by a propulsion device (31) supported by a cast-in-place concrete pipe row (27). The pipe laying method described in Section 4. 6. The device according to one of claims 1 to 5, comprising a propulsion station provided at the beginning of a propulsion shaft for propelling a working pipe, in particular consisting of a steel pipe. In the apparatus for carrying out the pipe laying method, an end mold frame and an inner mold i< (29°3
Device for laying pipes as described above, characterized in that it is provided with a mold frame device (28) slidable by a hydraulic reciprocating piston mechanism (31) with 0).