JP3489964B2 - Installation method of impermeable wall of gutter pipe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method of attaching a water impermeable wall provided around a gutter pipe buried in a dike or the like. 2. Description of the Related Art In order to prevent flooding and rupture of a levee at the time of flooding, there is a case where a gutter pipe for draining the rising water to another river or a wastewater treatment plant is provided at a foundation portion of the levee. is there. As a method of embedding this gutter pipe, conventionally, as shown in FIG. 10, an excavation groove T is cut out along the duct line of the gutter pipe 2 in the embankment 1, and the gutter pipe 2 is arranged there and A gutter pipe 2 is buried in the embankment 1 by a method of providing a water barrier 3 for preventing the formation of a water path along the line 2 at a substantially central portion of the pipeline and backfilling the gutter 2 as shown in FIG. Then, in order to provide the impermeable wall 3, a drilling hole H was excavated from the upper surface of the embankment 1 toward the gutter pipe 2, and a method of backfilling the impermeable wall 3 after installation was adopted. [0004] However, the former excavation method among the above-mentioned methods has a problem that it is not preferable for disaster prevention because the embankment is cut even though it is temporary. [0005] Further, when the upper surface of the embankment is a road, traffic is completely cut off from the start to the end of the construction, so that there is a complication that a detour must be provided. In addition, there was a problem that enormous construction costs were required and economic efficiency was poor. [0006] In the case of the latter propulsion method, since the whole embankment is not cut out, it can be said that there is less problem than the former, but the excavation hole H is deeply excavated from the upper surface of the embankment in order to provide the impermeable wall 3. Because of the necessity, construction becomes difficult, and there is a problem that traffic during that period is cut off. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when installing a gutter pipe on a dike, a water impermeable wall is attached to the gutter pipe without any cutting or excavation from the ground surface. The purpose was to get a method. [0008] According to the method of the present invention, a gutter pipe is attached to a gutter pipe at a position where a gutter pipe penetrates into a gutter pipe penetrating side face of a dike base while being sequentially connected by a propulsion method. When connecting the propulsion pipe at the approximate center position of the pipe in the process of the propulsion method, the pipe is divided into two parts in the axial direction, and is separated from the pipe inner surface by a connection piece with a gap for fitting a water impervious wall on the divided surface. After connecting the special propulsion pipe connected to it, penetrating the gutter pipe, injecting grout around the propulsion pipe and hardening, then removing the connection piece of the special propulsion pipe from inside the pipe and removing the soil at the impermeable wall mounting position A groove for exposing to the inner surface of the pipe and exposing a water impervious wall is excavated radially around the propulsion pipe, and a water impervious wall formed by dividing a disk into a large number in a radial direction and a circumferential direction is connected to the excavated groove. While inserting into the excavation trench to complete the disc-shaped impermeable wall, And the divided special propulsion pipe is connected in a watertight manner, and finally grout is injected into a space between the excavation groove and the impermeable wall, and the inner surface of the special propulsion pipe is finished to a uniform surface. It is. Therefore, according to the method of the present invention, since no excavation trench for construction is formed on the upper surface of the embankment, the strength of the embankment is not impaired, and there is no obstacle to traffic.
Furthermore, huge construction costs are reduced, and the construction period can be shortened. An embodiment of the present invention will be described below. In FIG. 1, as a method of penetrating the gutter pipe 2 into the embankment 1, it is assumed that a propulsion method in which a propulsion pipe 3 is sequentially connected from the starting shaft 1 </ b> A and propelled by the jack 1 </ b> B. That is, in the process of sequentially connecting the propulsion pipes 3 serving as the gutter pipes 2 to the gutter pipe penetrating position on the base side surface of the embankment 1 by the propulsion method and feeding the propulsion pipes 3, a propulsion pipe at a position corresponding to a substantially central position of the pipe line is provided. Are connected, the special propulsion pipe 4 is connected. As shown in FIG. 2, the special propulsion pipe 4 is shaped like a normal propulsion pipe 3 divided into two parts in the axial direction.
A structure is provided in which the connecting pieces 5... 5 having a strength sufficient to withstand the propulsion pressure are detachably connected from the inner surface of the pipe with a gap 4 </ b> A for fitting the impermeable wall to the divided surface. In the drawing, reference numeral 5A denotes a spacer, and 5B denotes a bolt for fastening the connection piece 5 to the divided tubes 4B and 4B. After the special propulsion pipe 4 is incorporated and the gutter pipe 2 is penetrated by the propulsion method, a grout agent 6 is injected around the gutter pipe 2 composed of the propulsion pipe 3 and hardened as shown in FIG.
Thereafter, as shown in FIG. 4, the connection piece 5 of the special propulsion pipe 3 is removed from the inside of the pipe, the soil 8 at the mounting position of the water impervious wall 7 is exposed to the inner surface of the pipe, and the water impervious wall 7 can be inserted as shown in FIG. A groove 8A is excavated radially around the gutter pipe 2, and a water impermeable wall formed by dividing the disc into a number of radially and circumferentially divided pieces 7A... 7A as shown in FIG. Jack 7B installed in a pipe while interconnecting the 7 divided pieces 7A
Insert it into the excavation groove 8A as described above. As means for inserting the divided pieces 7A, the divided pieces 7A are connected in the radial direction as shown in FIG.
In addition to the method of inserting A in the radial direction again, as shown in FIG. 7, the insertion position of the divided pieces 7A is fixed, and the partially completed impermeable walls 7C are sequentially pulled in in the circumferential direction by the pull-in ropes 7D. It may be good depending on the method of construction. 7E is a pulley,
7F indicates a winch. In the case of this retraction method, the device can be simplified since the insertion portion of the divided piece 7A can be inserted into one place. After completing the disk-shaped impermeable wall 7 in the excavation groove 8A, as shown in FIG. 8A, the impermeable wall base 7G and the divided special propulsion pipe 3 are interposed via a rubber plate 9 for sealing. 8 and connected by bolts or nuts 10, or by welding 11 without interposing a sealing rubber plate 9 as shown in FIG. 8 (b). Finally, grout 12 is injected into the space between the excavation groove 8A and the impermeable wall 7, and the mortar 13 is provided on the inner surface of the special propulsion pipe 3 to finish the surface uniformly. FIG.
Shows a completed gutter pipe 2 having a water impervious wall 4 at a substantially central portion, and an overflow weir 14 is provided on the river side. As described above, the present invention is based on the premise that the gutter pipe is installed on the embankment by a propulsion method in which the upper surface of the embankment is not cut off. It has the advantage that there is no traffic impediment even if the embankment is a road. Further, when the propulsion method is carried out, the embankment is located above the horizon, so that the embankment is easy to carry out and can be constructed at a low cost. The impermeable wall that prevents water leakage along the gutter pipe has a disk shape that spreads radially around the gutter pipe, and since the gutter pipe is connected to the impermeable wall in a watertight manner, the water impermeability is very good. It is possible to effectively prevent the formation of water channels along the gutter pipe.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an initial step of the method of the present invention. FIG. 2 is an enlarged sectional view of a special gutter tube. FIG. 3 is a cross-sectional view showing a state in which a gutter pipe is penetrated. FIG. 4 is a sectional view of a main part of a special gutter section. FIG. 5 is a cross-sectional view showing an excavation state of an excavation trench. FIG. 6 is an explanatory diagram of a step of installing a water impermeable wall. FIG. 7 is an explanatory diagram of another process of installing a water impermeable wall. FIG. 8 is an explanatory view of a main part showing a connection structure between a water impermeable wall and a special gutter pipe. FIG. 9 is an explanatory view of a completed gutter tube and impermeable walls. FIG. 10 is an explanatory cross-sectional view of a conventional method of attaching a gutter pipe to the impermeable wall. FIG. 11 is an explanatory cross-sectional view of another conventional method of attaching a gutter pipe to a water impervious wall. [Description of Signs] 1 ... Embankment 1A ... Starting shaft 1B ... Jack 2 ... Gutter pipe 3 ... Propulsion pipe 4 ... Special propulsion pipe 4A ... Clearance wall fitting gap 5 ... Connection piece 6 ... Grouting agent 7 ... Waterproof wall 7A ... Split pieces 7B ... Jacks 7G ... Water barrier wall base 8 ... Soil 8A ... Excavation grooves 12 ... Grout 13 ... Mortar

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-232230 (JP, A) JP-A-4-155006 (JP, A) Japanese Utility Model Showa 57-85679 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) E02B 3/04 E02B 3/10 E02B 8/00 E21D 9/06 311

Claims (1)

(57) [Claims] [Claim 1] A propulsion pipe to be a gutter pipe is fed into a gutter pipe penetrating position on the side face of the embankment while being sequentially connected by a propulsion method, and in the course of the propulsion method, substantially at the center of the pipeline. When connecting the propulsion pipe at the position, a special propulsion pipe that is divided into two parts in the axial direction and that is detachably connected to the inner surface of the pipe by a connecting piece with a gap for fitting a water impervious wall between the divided surfaces is connected. After penetrating the pipe, grouting agent is injected around the propulsion pipe and hardened, then the connection piece of the special propulsion pipe is removed from the pipe to expose the soil at the location of the impermeable wall to the inner surface of the pipe, and the impermeable wall is inserted. Excavation is made radially around the propulsion pipe, and a disk is inserted into the excavation groove while interconnecting water-impervious walls formed by dividing the disk into a number of radial and circumferential directions. After completing the water wall, the base of the impermeable wall and the divided special propulsion pipe are connected in a watertight manner. Water shield wall mounting method gutter pipe while injecting grout into the space, characterized in that to finish the special promotion inner surface a uniform surface between the end on the excavation and seepage control wall.