JP3403674B2 - Method of maintaining the suspension support posture of the tube - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention is applied to a case of sinking drilling groove filled with tube in a stable solution, the tube
The present invention relates to a suspension support posture holding method. In recent years, when pipes such as sewer pipes and box culverts are sunk and buried in the slot, the pipes are sunk one by one in the slot and connected. Instead of the so-called excavation method, a method in which multiple tube groups are set in excavation grooves filled with a stabilizing liquid and connected to each other or to a manhole (minimum), especially in urban areas is minimized. It is widely used to suppress The outline of the submerging method by the stable liquid excavation will be described. First, as shown in FIG. 1, guide walls 1 and 1 are constructed on the submerged position of the tube P and on both sides of the manhole portions M and M. . Then, although not shown, a predetermined distance from the starting end side human hole M between the guide walls 1 and 1 is
For example, to the next human hole M with a power shovel etc.
The excavation groove D is excavated while being filled with a stabilizing liquid B such as bentonite mud, and at the start of the excavation groove D, the human hole 2 is set in the manhole portion M. On the other hand, on the ground, as shown in FIGS. 2 and 3, a plurality of pipes P, P,... The lower support material 4 such as a shape steel is applied, and this is wound around the tubular body P by a wire 5 or the like to be integrated. A plurality of couplers 6 are fixed to the upper surface of the upper support member 3 of the integrated connecting pipe PU at intervals in the longitudinal direction.
The position monitoring and suspension support Gevin rods 7 are screwed together. [0005] After the setup is completed, for example, the connecting pipe body PU is connected via the wire 5 wound around the connecting pipe body PU by the chain block 9A using the portal crane scaffold 8 assembled as a structure as a support body. The support by the chain 9B is sequentially dropped, and is suspended to the position where the human hole 2 is to be connected. This settlement completion state is shown in FIG. Thereafter, although not shown, the construction member constructed between the guide walls 1 and 1 is connected to the Gevin rod 7 to suspend and support the connection pipe body PU. Next, after confirming that the connecting pipe PU is suspended and supported at the design position, a hardening material such as cement milk is injected into the stabilizing liquid B in the excavation groove D and air agitation is performed. Solidification of Stabilizer B is attempted. After completion of this solidification and a curing period of about one week, an operator infiltrates into the manhole 2 and excavates the solidified mud water portion as shown in FIG. , And a short pipe P ′ for connection is inserted into the through hole from the inside of the human hole 2, and a mortar is filled in the space around the short pipe P ′ to stop water. However, in such a conventional method, when the pipe body is suspended from the excavation groove, the pipe body is only suspended and supported from the ground side by a flexible suspension material. Therefore, the tube body is in a state that can swing in the groove width direction or the groove longitudinal direction with respect to the support body, and particularly under the situation where the tube body receives buoyancy in the stable liquid, Another problem is that the tube core of the suspended and supported tube body cannot be held on a predetermined design line even if the groove is not filled with the stabilizing liquid. Therefore, a main object of the present invention is to enable the tube core of the suspended and supported tube body to be held on a predetermined line. In the present invention, which has solved the above problems, a plurality of manholes are installed in a excavation groove filled with a stabilizing liquid, and then connected between adjacent manholes. The pipe body is suspended and set, and the pipe body is held in a predetermined suspension support posture when the set pipe body is suspended and supported in the stabilizing liquid, and a guide body is provided in each of the human holes. on the other hand, the guided body is guided while engaging the guide member, into the corresponding sites of the tubular body, longitudinal of the tubular body
Respectively As slidable in the direction, when down hanging the tube body, slide each guided member of the tubular body
To align each guide body provided in the manhole.
In a state where the pipe body is engaged and engaged, the pipe body is suspended and set in the stable liquid in the excavation groove, and the pipe body is held in a posture in which the pipe core is aligned with the design line by the engagement. A method for maintaining a suspended support posture of a pipe body in a digging groove. It is. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a comparative example will be described with reference to an application example to a submerged construction method by stable liquid excavation, and then, an embodiment of the present invention will be described based on comparison with this comparative example. It explains in detail about. <Comparative example> First, construction of a guide wall and stable liquid excavation of the excavation groove are performed as in the above-described conventional example, and a manhole is installed at the start end of the excavation groove. FIG. 5 shows a state after the human hole 2 is installed. Here, in this comparative example, when it is desired to hold the guide rod 10 (guide body) corresponding to the reference body in a predetermined posture, for example, a connecting pipe PU described later in a horizontal posture, the posture is along the vertical direction. For example, the tube installation plan in the human hole 2 is slightly detachable from the center in the groove width direction of the lower surface 2U by being detachably screwed via a nut 11, for example. It is installed on the bottom of the start end in the excavation groove D. In this case, it is preferable that the guide rod 10 has such a length that it protrudes from the surface of the stabilizing liquid B in the subsequent tube body supporting step in order to facilitate the later-described guide. Further, when the human hole 2 is installed, the human hole 2 is accurately positioned at an accurate position so that the posture of the guide rod 10 corresponds to the suspension support posture of the connecting pipe body PU.
Is installed. On the other hand, on the ground, for example, the integrated connecting pipe PU is assembled in the same manner as in the conventional example. At this time, at least prior to suspension, the guided device 20 having the guided tube 23 (guided body) as an engaging body is attached to a portion of the connecting tube PU corresponding to the guide rod in the groove D. As shown in FIG. 6, the guided device 20 is formed on the upper support member 3 in the integrated connecting pipe PU.
A main body tubular portion 21 fixed by welding or the like in a posture along the longitudinal direction of the tubular body PU, and a slide shaft 22 inserted into the main body tubular portion 21 and supported slidably in the longitudinal direction.
And a guided tube 23 fixed to the tip of the slide shaft 22. Since this example assumes that the tubular body PU is held in a horizontal posture, the slide shaft 2
2 slides in parallel with the connecting tube PU (the tube core),
The slide shaft 22 and the guided tube 23 form a right angle. Further, in the illustrated example, couplers 6 and 6 to which the Gevin rod 7 is screwed are fixed to the side of the main body tubular portion 21 at two front and rear portions, and the lower portions of these couplers 6 and 6 are integrally connected pipe PU. Is fixed on the upper support 3 by welding or the like. Further, reinforcing ribs 24U and 24L for reinforcing the connection and fixing of the guided tube 23 and the slide shaft 22 are formed. Then, as shown in FIG. 7, the connecting pipe PU is suspended in, for example, a suspended form similar to the above-mentioned conventional example, suspended in the excavation groove for submerging the tubular body, and placed in the stabilizing liquid B. Sunk. Therefore, the suspension fulcrum is the excavation groove D
It is located above. At the time of such suspension, the guide rod 10 erected in the vicinity of the human hole in the excavation groove D is inserted into the guided tube 23 of the guided device 20 attached to the tubular body PU side. At this time, the guided tube 23 is connected to the tube P as described above.
If the guide tube 23 can be slid along the longitudinal direction of U, the guided tube 23 can be easily adjusted to the insertion position of the guide rod 10. When the pipe body PU is suspended with the guide rod 10 inserted into the guided pipe 23 and submerged in the stabilizing liquid B, the connecting pipe body PU is guided in the suspension process. It is guided along the guide bar 10 while engaging with the guide bar 10 via the device 20. Characteristically, the connecting pipe PU through the guided device 20
And the guide rod 10 and the engagement position is always below the suspension fulcrum by the suspension device, so that the connecting pipe PU is suspended and maintained in a desired suspension posture from the initial stage to the end of the suspension. However, it is suspended in the groove D smoothly and is suspended and supported (temporarily supported) in a predetermined posture, in the illustrated example, in a horizontal posture in a state where it is lowered to a predetermined depth. Next, for example, as in the above-described conventional example, the erection member laid between the guide walls 1 and the Gevin rods 7, 7,.
Are connected and suspended by the guide wall 1 (main support) via the erection member, and then the suspension support by a suspension device (not shown) is released. Next, preferably, in order to secure a communication hole forming region between the connecting pipe body PU and the human hole 2, the guide rod 10 is removed from the human hole 2, and at least outside the communication hole forming region,
Usually taken out of the groove D. Thereafter, for example, as in the above-described conventional example, the stabilizing liquid is solidified, and after completion of solidification and a predetermined curing period, the human hole 2 and the connecting pipe PU are brought into communication. <Embodiment of the Present Invention> On the other hand, FIG. 8 shows an embodiment of the present invention. After connecting a plurality of human holes 2 and 2 as shown in the figure, an integrated connecting pipe P connecting the adjacent human holes 2 and 2 to each other.
When installing U2, connected pipe PU as in the above comparative example
It is not sufficient to hold 2 in a horizontal posture or an inclined posture, and it is necessary to match the pipe core of the connecting pipe body PU2 to a predetermined line, that is, a line (design line) connecting the centers of the connection portions of the human hole 2. However, as in the comparative example described above, the guide rod 1
Guided device 20 by simply inserting the guided tube 23 into 0
Then, the suspension support posture of the connecting pipe body PU2 can be adjusted to the target posture by the method of the above-described example, and the installation depth can be adjusted by adjusting the amount of descent by the suspension device, but the guide rod 10 Guided tube 2 as axis
Since 3 can rotate, if only one set of them is provided, the connecting pipe body PU2 rotates around the guide rod 10 and the tube core cannot be aligned with the target line. Therefore, in the present embodiment, in each of the human holes 2 and 2, a portion that is slightly laterally offset from the center in the groove width direction at the lower portion of the side surface of the tube body is vertically adjusted according to the suspension support posture of the connection tube body PU 2. Each of the guide rods 10A and 10B is attached along the direction or at a predetermined inclination angle,
Guided devices 20A and 20B are respectively attached to portions corresponding to the guide rods 10A and 10B in the connecting pipe PU2. When the connecting tube PU2 is suspended, the guide tubes 23 of the guided devices 20A and 20B are suspended.
After inserting the corresponding guide rods 10A and 10B into A and 23B, the connecting pipe body PU2 is set in the stabilizing liquid B. Thus, the suspended connecting pipe PU2 is suspended.
Are engaged with the guide rods 10A and 10B at each position at least at two locations in the longitudinal direction via the guided devices 20A and 20B, respectively, and therefore rotate around the guide rods as in the above example. Therefore, the tube core can be held in alignment with the target line L1. In the hanging process, the connecting pipe body PU2 is engaged with the guide rods 10A and 10B at each position at least at two positions in the longitudinal direction.
It slides down in parallel to the target line in the same posture as the final suspension support posture. Therefore, in this example, there is also an advantage that the connecting pipe body PU2 can be smoothly suspended without colliding with the inside of the groove including the side wall of the groove D. <Others> (a) The engaging body of the present invention may be provided at any part of the tube. (B) In the guided apparatus 20 of the above example, a fixing means for fixing the slide shaft 22 to an appropriate slide position may be provided. (C) In the embodiment according to the present invention, although not shown, the same effect can be obtained by providing a plurality of guide rods and providing (for example, one) guided pipes to be engaged with each of the guide rods. An effect can be obtained. As described above, according to the present invention, the tube core of the suspended and supported tube body can be held on a predetermined design line.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing the construction of a conventional guide wall and the excavation form of excavation grooves. FIG. 2 is a longitudinal sectional view showing a conventional pipe hanging process. FIG. 3 is a longitudinal sectional view showing a conventional tube hanging process from another direction. FIG. 4 is a longitudinal sectional view showing a conventional process for connecting a human hole and a tube. FIG. 5 is a longitudinal sectional view showing a stage before the pipe is suspended according to the present invention. FIG. 6 is a perspective view showing the suspension support posture holding device. FIG. 7 shows a process of hanging a tubular body according to the present invention.
It is a longitudinal cross-sectional view. FIG. 8 is a longitudinal sectional view showing another embodiment of hanging the pipe according to the present invention. [Explanation of Symbols] 1 ... guide wall, 2 ... human hole, 10 ... guide rod, 23
... guided pipe, PU ... integrated connecting pipe, B ... stable liquid, D
... excavation groove.

──────────────────────────────────────────────────── ─── Continued from front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 1/02 E03F 3/06 F16L 3/14

Claims (1)

(57) [Claims] [Claim 1] After installing a plurality of human holes in an excavation groove filled with a stabilizing liquid, a pipe connecting them between adjacent human holes is suspended and set. In addition, a method of holding the tube body in a predetermined suspension support posture when suspending and supporting the settled tube body in the stabilizing liquid, wherein a guide body is provided in each of the human holes, and the guided bodies are guided while engaged, the corresponding portion of the tube body, a slidable in the longitudinal direction of the tubular body
In the state where each guided body of the tube body is slid to be aligned with and engaged with each guide body provided in the human hole when the tube body is suspended, Suspension of the pipe body in the excavation groove characterized in that the pipe body is suspended and set in the stable liquid in the excavation groove, and the pipe core is held in a posture in which the pipe core is aligned with a design line by the engagement. Support posture holding method.