JPH02204598A - Underground driving of buried piping block - Google Patents

Abstract

PURPOSE:To avoid coupling discrepancy in press-fitting work for buried piping blocks by forming the buried block in such a manner that piercing holes, which are located at prescribed positions and the central axes of which agree with each other, penetrate the cylindrical blocks, starting at their both ends, and open at a cavity formed on the inner peripheral surface of the block. CONSTITUTION:A cut-out part 4 is formed on the peripheral surface 3 adjacent to both end surfaces 2 of a cylindrical block 1, while a connecting rim 6 is fitted to a cut-out part 4 on one side, so that a projected rim 6 is provided along a free edge of the end surface 2. A cavity is formed into a square-pole shape at the corner part on the inner periphery. From both end surfaces 2 and 2 of the cylindrical block 1, piercing holes 10 and 10, which are located at the prescribed positions and central axes of which agree with each other, penetrate the block wall until open at the cavity, thereby forming a buried piping block 11. In addition, a tension member 12 penetrates the piercing hole 10 and is tightened by a nut 14. With this contrivance, positional discrepancy of the blocks 11 and 11 in their press-fitting can be avoided, and a high tightening effect can be held.

Description

[Detailed description of the invention] The present invention relates to buried conduits such as culverts, tunnels, and electric wires.

This is an underground propulsion method for underground pipe blocks used in the construction of other underground pipes, etc.

To carry out the propulsion method, conventionally, the blocks are connected to each other by fitting a cylindrical block made of concrete and a ring body made of iron plate, etc., which is fitted across both blocks adjacent in the front and back direction. However, the present invention focuses on this connection and aims to strengthen the connection so that the connection does not shake during press-fitting.

An embodiment of the buried pipe block according to the present invention shown in the drawings will be described. The cylindrical block 1 is a rectangular cylindrical body, and has notches 4, 4 surrounding the outer circumferential surface 3 formed around the outer circumferential surface 3 following both end surfaces 2.2, and a connecting edge 5 fitted into one of the notches 4. It is shown that a protruding edge 6 is provided around the free end of the connecting edge 5. Then, a concave part 9 is formed in the shape of a quadrangular prism, preferably at a corner 8 of the inner periphery 7, and a through hole 10 is formed from both end surfaces 2, 2 of the cylindrical block 10 at a fixed position and whose diameters match each other. .10 is penetrated, and the through hole 1
0 is opened in the concave portion 9 to form a buried pipe block 11. In the illustration, the concave portion 9 is formed in the shape of a square prism, and the through hole l
By arranging O at the four corners, it is shown that the fastening effect of the tensile material 12 of the buried pipe block 11 was maintained at a high level, as will be described later.

Construction blocks such as those used in the present invention are usually made of concrete as it is an easily obtainable material, but the depth of the notch 4 should be as shallow as possible since cutting out the notch 4 would damage the cross section of the block and reduce its strength. However, the connecting edge 5 fitted thereon is made of a high-strength material in order to be thin so as not to protrude beyond the outer peripheral surface 3 in order to avoid resistance during propulsion, and in this sense iron plates are usually used.

FIG. 7 shows a large number of buried pipe blocks 11 according to the present invention,
11 , . . . tensile materials 12 , 12 , . . .
A part of the bonded state is shown, but the illustration shows two blocks that are polymerized together! 1, 11.

To explain the fastening, the connection edge 5 of one block 11
By fitting the protruding edge 6 of the block 11 with the notch 4 formed around the outer peripheral surface 3 following the one end surface 2 of the adjacent block 11, a concave portion is formed from both end surfaces 2°, 2 of the block 11 in the present invention. 9
The through-holes 10, 10 which are opened through the blocks are arranged so that their core diameters match each other and are provided in fixed positions. A tensile material 12 such as a steel rod, steel wire, stranded wire, etc. can be inserted across the through holes 10, 10, and both ends 13 of the tensile material 12 can be inserted.
, 13 are fastened by the respective nuts) 14 and 14, both blocks 11 and 11's concave portions 9 and 9 will attract the end walls 15 and 15 on the side closer to the other side, so both blocks il,
11 will be brought together.

8th. FIG. 9 shows a state in which the shaft propulsion method using blocks 11 according to the present invention has been advanced to a certain extent. Although illustration of each stage of the propulsion method using the block 11 is omitted, the 8th. As understood based on Figure 9,
To start the propulsion method, a leading block 11 is fitted with a cutting edge 16 serving as an excavation blade in a notch 4 that goes around with the front side shown as the front side, and a propulsion platform at the bottom of a pile 18 excavated into the ground surface 17. 19. At the bottom of the shaft 18 is a propulsion platform 1.
A propulsion mechanism 22. such as a bearing plate side, a hydraulic jack, etc., mounted on the support plate 22. 'f lock 11-\ minimum light frame 2
1 and 1101 blocks is sufficient.

First, if the propulsion mechanism 22 is driven against the block 11 in the present invention, which is the leading block, the reaction force will be applied to the bearing plate 2.
The block 1 is supported by the block 1 with the light frame 21 interposed behind it.
1 is pressed and press-fitted into the strata.

If the dirt and sand that enters through the blade opening 16 due to press-fitting is scraped off and carried out to the outside of the pile 18, and the number of light frames 21 is increased and the movement is continued, the block 11 will substantially protrude outside the pile 18. Earth and sand that enters during press-in will be removed. Then, the next block 11 is suspended on the propulsion platform 19 and superimposed on the first block 11, and if there is a fitting location as shown in the figure, the fitting is also performed.

Through hole l of the first burial block 11 press-fitted into the geological formation
The tensile material 12 is inserted from O across the through hole 10 of the next buried block 11, and its front end is fastened to the end wall 15 of the concave portion 9 of the first block 11, and the tensile material 12 is The rear end is connected to the end wall 1 of the concave portion 9 of the next buried pipe block 11.
5. Tightly tighten. That is, after both the first and second blocks 11, 11 are tied together by the tensile material 12 and the oak 14, the propulsion mechanism 22 is driven to connect both blocks 11.
, 11 into the stratum n, there is no risk of press-fitting blurring between the two blocks due to tightness during press-fitting, and the earth and sand that entered from the tip are carried out and propelled into the stratum n. First and next overlapping blocks 11.1
The bond between 1 is that both blocks 1 overlap in a preceding and succeeding relationship.
The connection between 1 and 11 is as described with reference to Figure 7.

Blocks 11, 11, 3rd place and below as necessary
To sequentially polymerize a desired number of tensile materials 12.

(Nara) 14, the concave portions 9, 9 are used for fastening, press-fitting into the stratum n, and transporting the earth and sand from the tip are repeated to propel the pipe into the stratum n. There is no risk of this occurring.

Therefore, the direction of the conduit does not deviate from the intended direction.

In the case of the illustrated buried pipe block 11, it is possible to carry out the propulsion method by overlappingly fitting the back side to the front side, but this is not possible without the risk of earth and sand digging into the protruding edge 6 when press-fitting the block 11. , it is preferable that the front side be the front side.

Since the concave portion 9 is formed in the inner periphery 7' of the plotter 11 in the present invention, there is no risk of damaging the peripheral wall cross section of the square cylinder 1, and the end of the tensile material 12 inserted through the through hole 10 is not damaged. 13 can be tightened in the recess 9 by means of a nut 14, so that the end 13. There is no problem with the nut 14 protruding into the inner periphery 7, and even if an intermediate block for the propulsion construction method, which has the through hole 10 but does not have the entire concave part 9, is interposed, the tensile material 12 is small in quantity. Since there is no need to increase the length, the tying work is easy.

In the present invention, the blocks 110 in the present invention are penetrated from both end faces 2, 2 through the through holes 10.degree. , 11 can be tightened by a tensile member 12 and a nut 14 to prevent press-fitting of both blocks 11 and 11. If the tightening is repeated continuously in this way, blocks 11, 11, . . . will be formed over the entire length of the pipe.
There is no risk of press-fitting occurring.

Therefore, the direction of the conduit is also deviated from the desired direction #'i
do not have.

As described above, the underground propulsion method for a buried pipe block according to the present invention can be used in an underground propulsion construction method, and greatly contributes to the improvement of construction technology.

[Brief explanation of the drawing]

The figure shows an embodiment of a buried pipe block according to the present invention and an example of a method for propelling the block underground. Fig. 1 is a front view of the block, Fig. 2 is a right side view, Fig. 3 is a plan view, Fig. 4 is a sectional view taken along line B-B in Fig. 2,
Figure 5 is a sectional view taken along the line C-C in Figure 3 ＼ Figure 6 is Figure 1 A
- It is a sectional view taken along the line A. FIG. 7 is a sectional view showing an example of the fastened state of the buried pipe block according to the embodiment of the present invention. FIG. 8 shows an example of a construction state using the above-mentioned embodiment of the buried pipe block according to the present invention, and FIG. A vertical cross-sectional view of the figure is shown. L...Cylindrical block, 2...End surface, 3...Outer peripheral surface 4...Notch, 5...Connection edge, 6...-Protruding edge 7...Inner circumference, 8...・Corner part, 9... Recessed part 10... Through hole, 11... Buried pipe block 1
2... Tensile material, 15... End wall, 18... Vertical shaft, 21... Frame, 13... End part, 16... Blade opening\ 19... Propulsion platform, 22 ... Propulsion mechanism, 14... Nut 17... Ground surface 20... Bearing plate n... Ground layer Fig. 5 Fig. 6

Claims (1)

[Claims] A concave portion is formed on the inner circumferential surface of the cylindrical block, through-holes are passed through from both end surfaces of the block at fixed positions where the core wires coincide with each other, and the through-holes are opened in the concave portion. A buried pipe block is formed, and the front end of the tensile material inserted from the through hole of the preceding buried pipe block press-fitted into the stratum to the through hole of the subsequent buried pipe block is inserted into the concave part of the preceding block. At the same time, the rear end of the tensile material is tension-fastened to the end wall of the concave part of the buried pipe block located at the rear, and then the propulsion mechanism is driven to press fit these into the stratum and enter from the tip. Carrying out the earth and sand and propelling it into the stratum, as necessary, sequentially polymerizing the following buried pipe blocks and tightening them using the recessed part, press-fitting into the stratum, and carrying out the earth and sand that enters from the tip and is repeated. An underground propulsion method for a buried pipe block characterized by propulsion into a stratum.