JP5511620B2 - Reconstruction method for buried pipes with different axis and partially wrapped - Google Patents

Description

  The present invention relates to a reconstruction promotion method for reconstructing an existing buried pipe that has been buried and aged in the ground into a new buried pipe, and more particularly, to a buried pipe reconstructing method in which the axes of old and new pipes are different and a part thereof is wrapped. .

  Underground pipes used for various purposes, including water and sewage systems, etc., are aging due to secular change, so it is necessary to replace them with new underground pipes at an appropriate time. In remodeling the existing buried pipe, in order to reduce the influence of insufficient flow of the existing buried pipe and vibration from the road, the new buried pipe is installed at a position where the axis of the existing buried pipe is different and part of it wraps with the existing buried pipe. It is necessary to install.

  As a buried pipe remodeling method in which the axes of the existing pipe and the new pipe are different and partly wraps as described above, JP 2008-38485A discloses an existing buried pipe buried in the ground as a cutter of a propulsion unit. A method of propelling the renewed pipe with the leading pipe simultaneously using the propulsion device while crushing with the head, and excavating the start pit from the ground surface at the start end position of the buried pipe, A step of installing at a starting point, a step of inserting a guide device preceding the leading conduit into the tube of the buried tube using the buried tube as a guide travel path, and the leading conduit being eccentric from the axis of the buried tube and the buried Positioning the propulsion unit with a position that partially overlaps the tube as a propulsion position, connecting the guide device and the leading conduit with an eccentric support arm, and a cutter head of the propulsion unit Crushing part While pushing the tip pipe by the propulsion unit, and propelling the renewal pipe together with the tip pipe while moving the guide device in advance using the buried pipe as a guide travel path and a reaction force during crushing; A method for reconstructing an existing buried pipe is disclosed.

  In underground pipe construction, underground underground pipes are public facilities, so it is necessary to convert existing underground pipes to new underground pipes in a usable state. Conventionally, a renovation method has been implemented in which a temporary drain pipe is laid on the ground and water and sewerage can be used during the renovation work. Further, in Japanese Patent Laid-Open No. 2005-336884, before reconstructing an existing buried pipe, a temporary drain pipe is provided in the basement in the vicinity of the existing buried pipe to be reconstructed, and the flow of water is secured by the temporary drain pipe. A buried pipe reconstruction method for reconstructing an existing buried pipe into a new one is disclosed.

JP 2008-38485 A JP-A-2005-336884

  However, the buried pipe reconstruction method disclosed in Patent Document 1 is to crush a part of the existing buried pipe to be wrapped with the cutter head of the propulsion device, but cuts the reinforcing bars and the joints of the existing buried pipe with the cutter head. However, it has a problem that rebars and joints are entangled with the cutter head and much time is required to remove them. In addition, when a temporary drain pipe is installed on the ground, there is a problem that it becomes a traffic obstacle. In the buried pipe reconstruction method disclosed in Patent Document 2, a temporary drain pipe must be laid in the ground, and after the buried pipe has been reconstructed, the temporary drain pipe laid underground is removed. Since it is expensive, it is left as it is, and there is a problem that waste of materials occurs. In addition, since the temporary drain pipe is generally small in diameter, it has a problem that it cannot cope with an emergency water increase such as guerrilla heavy rain.

  The present invention solves the above-mentioned problems of the prior art, and the cutting and removal of the lap portion with the existing buried pipe is carried out in advance with respect to the propulsion embedding of the new pipe, and the reinforcing bar at the time of propulsion of the propulsion embedding machine The purpose of this project is to provide a method for reconstructing buried pipes, which solves the problem of joints and links, maintains the existing buried pipes as a space for securing the flow of water, and has a different axial center for installing new pipes and partially wraps. .

  In order to solve the above-described problem, the buried pipe remodeling method in which the axial center of the present invention is different and a part wraps, a process of installing a temporary drain pipe communicating with a household drainage mounting pipe in the existing buried pipe, Protective material to form a space to secure the flow of water in the existing buried pipe including the process of cutting the part to be wrapped with the new pipe with the cutter device, the process of removing the cut object, and the part to be wrapped with the new pipe The process of installing the new pipe along the lap part where the protective material was installed by the propulsion burial machine, and the temporary drain pipe is removed after the new pipe is installed, and the rest of the existing pipe Forming a mounting pipe flow path communicating with the household drainage mounting pipe in the space, and filling the space excluding the mounting pipe line with a protective material.

  In addition, the buried pipe remodeling method in which the axial center of the present invention is different and partly wraps is a process in which a part of the existing buried pipe is cut with a cutter device, and the existing buried pipe is grounded with pressure to protect the outer ground of the existing buried pipe. Or ground protection material is injected around the existing buried pipe.

  Moreover, the buried pipe reconstruction method in which the axial center of the present invention differs and a part thereof wraps is characterized in that the protective material is used as a precast member and is pushed in and installed along the existing buried pipe partly cut.

By installing a temporary drain pipe communicating with the household drainage pipe in the existing buried pipe, it can be used as a public facility even during the reconstruction work. Since the cutting and removal of the lap portion with the existing buried pipe is performed in advance by the cutter device, the propulsion embedding can be easily carried out because there is no reinforcing bar or joint when propelling the propulsion embedding machine. In addition, since the existing buried pipe is protected by the protective material during the renovation work, the temporary drain pipe can be easily placed in the existing buried pipe, and it is already installed even in case of unsuccessful water increase such as guerrilla heavy rain. Since a space for water to flow is secured in the pipe, it is possible to cope with it. In addition, since the protective material is installed, it is possible to stabilize the digging face when digging with the propulsion burial machine. In addition, after the installation of new pipes is completed, the temporary drain pipes are removed, and the remaining pipes in the existing buried pipes are formed with installation pipe channels that communicate with the household drainage installation pipes. Enable use.
In order to protect the outer periphery of the existing buried pipe in the process of cutting a part of the existing buried pipe with a cutter device, either pressure is applied to the existing buried pipe or ground protection material is injected around the existing buried pipe. It becomes possible to reduce the influence on the surrounding ground in the operation | work which cuts a part of buried pipe with a cutter apparatus.
By using the protective material as a precast member and pushing it into an existing buried pipe that has been partially cut, the working time can be greatly reduced compared to filling and solidifying solidifying material such as mortar.

(A) (b) It is a figure which shows embodiment of this invention. (A) (b) (c) It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A)-(f) It is a figure which shows embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. FIGS. 1-7 is a figure which shows the operation | work process of the buried pipe reconstruction method from which the axial center of this invention differs. The remodeling method of the present invention is applicable when the existing buried pipe 3 and the newly installed pipe 4 have different axial centers, and the newly installed pipe wraps with a part of the upper, lower, left and right sides of the existing buried pipe 3. 7 describes a case where the existing buried pipe 3 and the newly installed pipe 4 have different axes, and a part of the lower part of the existing buried pipe 3 and the new installed pipe wrap.

  As a preparatory stage for the reconstruction method of the existing buried pipe 3, the current state of the existing buried pipe 3 is investigated, the degree of aging of the existing buried pipe 3 and the change in the normal line, etc. are investigated, and the position of the newly installed pipe 4 is determined.

  1A and 1B, the first stage of the reconstruction method of the existing buried pipe 3 is that the installation position of the new installed pipe 4 is lower than the existing installed pipe 3, and a part of the new installed pipe 4 is the existing installed pipe 3. The starting shaft 1 and the reaching shaft 2 which are determined to be positions to wrap in the lower part are excavated. The depth of the starting shaft 1 and the reaching shaft 2 is the depth at which the new pipe 4 is installed. A temporary drainage pipe 5 communicating with the household drainage attachment pipe 10 from each household is installed in the existing buried pipe 3 to ensure the flow of water necessary for life. The temporary drain pipe 5 is provided with a pump on the upstream side in order to secure a flow rate.

  2A and 2B, the second stage of the reconstructing method for the existing buried pipe 3 is performed by cutting the lower part of the existing buried pipe 3 where the new pipe 4 is wrapped by the cutter device 6 from the start shaft 1. As the cutter device 6, a wedge-type cutter or a rotary cutter is used. If a plurality of wedge-shaped teeth for crushing the lower part of the cut existing buried pipe 3 are provided in the cutter device 6 that cuts the lower part of the existing buried pipe 3, the removal work at the next stage of cutting becomes easy. During the cutting operation of the existing buried pipe 3 by the cutter device 6, the inside of the existing buried pipe 3 may be in a pressurized state in order to prevent a situation where the ground around the existing buried pipe 3 is loosened by vibration or the like. Moreover, you may inject | pour a ground improvement agent into the existing surrounding circumference | surroundings of the underground pipe 3.

  In the third stage of the reconstruction method for the existing buried pipe 3 shown in FIG. 3, the cut material of the existing buried pipe 3 cut by the cutter device 6 is removed. In the cutting process of the existing buried pipe 3, when the cut part is not crushed finely, the cut part is removed while crushing the cut part finely by the crushing means in the cutting part removing process.

  In the fourth stage of the reconstruction method for the existing buried pipe 3 shown in FIGS. 4 (a) and 4 (b), the protective material 7 is injected into the cut and removed portion of the lower part of the existing buried pipe 3. The protective material 7 is installed so that a space for securing the flow of water is formed in the existing buried pipe including a portion that wraps with the new pipe. As a method of installing the protective material 7, there are a method of filling and solidifying a solidifying material such as mortar, and a method of pushing in a lightweight precast member previously formed of a chemical synthetic material or the like using the cut portion of the existing buried pipe 3 as a guide. . By making the protective member 7 a lightweight precast member, it is possible to greatly shorten the working time compared to a method of filling and solidifying a solidifying material such as mortar.

  As shown in FIG. 4 (b), the protective material 7 is placed so as not to be lifted by driving the propulsion embedding machine 8 in the next process even in the case of filling with a solidifying material such as mortar or in the case of pushing in a lightweight precast member. As shown, the state is such that it engages with the cutting portion of the existing buried pipe 3. The protective member 7 is installed so that a space for securing a flow of water in the case of an unexpected increase in water due to guerrilla heavy rain or the like is formed in a portion that wraps with the new pipe 4 and the existing buried pipe 3.

  The purpose of installing the protective material 7 at the cutting portion of the existing buried pipe 3 is to secure the flow of water at the time of the occasional water increase as described above, and the existing buried pipe 3 whose part is cut and the strength is reduced. However, at the time of propulsion embedding of the new pipe 4 by the propulsion burial excavator 8, which is the next step, the existing burial pipe 3 is prevented from being destroyed by vibration and impact caused by the excavation of the propulsion burial excavator 8 It has the purpose of doing. Furthermore, if the space portion where the protective material is not installed on the portion of the existing buried pipe 3 that wraps with the new pipe 4 is present, there is a portion where the excavation load is extremely low during the rotary excavation work by the propulsion underground excavator 8, There arises a problem that the direction is deviated from the planned direction, and a problem that excavated material accompanying excavation flows into the existing buried pipe 3. By installing the protective material 7 on the wrapping portion of the new pipe 4, the face surface during the excavation work of the propulsion embedding machine 8 is stabilized, and stable excavation becomes possible.

  5 (a) and 5 (b), the fifth stage of the reconstructing method of the existing buried pipe 3 is to propel the existing buried pipe 3 on which the protective material 7 is installed and the new buried pipe 4 partially wrapped therewith. 8 will be installed. As described above, since the protective material 7 is installed at the cut and removed portion of the existing buried pipe 3, damage to the existing buried pipe 3 due to the excavation work is prevented, and the excavation face of the propulsion embedding machine 8 is stabilized. Is possible. In the excavation by the propulsion burial machine 8, the portion where the existing pipe 3 and the new pipe 4 wrap is cut and removed in advance, and there is no reinforcing bar or joint, so there is no special digging machine or tools. It becomes possible to work.

  The sixth stage of the reconstructing method for the existing buried pipe 3 shown in FIGS. 6A and 6B is a state in which the installation of the new pipe 4 has been completed between the starting shaft 1 and the reaching shaft 2. At this stage, the temporary drain pipe 5 installed in the existing buried pipe 3 is removed. In the space of the existing buried pipe 3 from which the temporary drain pipe 5 has been removed, an attachment pipe flow path 9 for a precast member is installed, and the other space is filled with a protective material 7 such as mortar and solidified. After the renovation work of the new pipe 4 is completed, it is possible to quickly cope with a state where it can be used as a public facility by installing the attachment pipe channel 9 in the existing buried pipe 3. Moreover, it becomes possible to protect the existing underground pipe 3 from earth pressure etc. by filling the remaining space with the protective material 7.

  FIG. 7 is a view for explaining the flow of water through the mounting pipe channel 9 installed in the existing buried pipe 3. A collecting rod 12 for receiving the drainage flowing from the auxiliary pipe channel 9 is installed in the manhole 11 on the downstream side, a pump 13 is installed on the collecting rod 12, and the drainage in the collecting rod 12 is used for the downstream household drainage pipe. Run on path 9.

  FIGS. 8A to 8F show the steps of the remodeling method in the case where the axes of the existing buried pipe 3 and the new installed pipe 4 are different and the new installed pipe 4 wraps with a part of the right side of the existing buried pipe 3. Is. Since each process is the same as the process of the remodeling method when the new pipe 4 shown in FIGS. 1 to 6 wraps with a part of the lower part of the existing buried pipe 3, the description thereof is omitted. When the axis of the existing pipe 3 and the new pipe 4 are different and the new pipe 4 wraps with a part of the left side of the existing pipe 3, the axes of the existing pipe 3 and the new pipe 4 are different, and the new pipe 4 Is the same as the process of the remodeling method shown in FIGS.

  As described above, according to the buried pipe remodeling method in which the axial center of the present invention is different and partly wraps, a public drainage facility can be installed even during reconstruction work by installing a temporary drain pipe that communicates with the household drainage mounting pipe in the existing buried pipe. Since the cutting and removal of the lap part with the existing buried pipe is carried out in advance by the cutter device, there is no rebar or joints when propelling the propulsion embedding machine, so that propulsion embedding can be easily performed. Since the existing buried pipe is protected by the protective material during the renovation work, the temporary drain pipe can be easily placed in the existing buried pipe, and the existing drainage pipe is installed even in case of unsuccessful water increase such as guerrilla heavy rain. Since the space for water flow is secured in the pipe, it is possible to cope with it, and because the protective material is installed, it becomes possible to stabilize the digging face when digging with the propulsion burial machine Furthermore, the installation of new pipes After, and removing the temporary drainage pipe, by forming the mounting tube passage communicating with domestic wastewater attachment tube in the remaining space of the existing buried pipe, enables the use of quick public facilities after completion of construction.

  1: start shaft, 2: reach shaft, 3: existing underground pipe, 4: newly installed pipe, 5: temporary drain pipe, 6: cutter device 6: protective material, 8: propulsion underground excavator, 9: mounting pipe flow path, 10: House drainage installation pipe, 11: Manhole, 12: Collecting rod, 13: Pump

Claims (3)

A step of installing a temporary drain pipe communicating with a household drainage pipe in an existing buried pipe;
Cutting a portion of the existing buried pipe that wraps with the new pipe with a cutter device;
Removing the cut material;
A step of installing a protective material so that a space for securing the flow of water is formed in the existing buried pipe including a portion to be wrapped with the new pipe;
A process of propelling and burying the new pipe along the lap portion where the protective material is installed by the propulsion burial machine;
After completing the installation of the new pipe, removing the temporary drain pipe, forming a mounting pipe flow path communicating with the household drainage mounting pipe in the remaining space of the existing buried pipe, and filling the space excluding the mounting pipe with a protective material A buried pipe remodeling method in which the shaft center is different and partly wraps.   In the process of cutting a part of the existing buried pipe with a cutter device, in order to protect the outer periphery of the existing buried pipe, the inside of the existing buried pipe is put in a pressurized state, or a ground reinforcing material is injected around the existing buried pipe The buried pipe reconstruction method in which the axial center according to claim 1 is different and partly wraps.   The embedment in which the shaft center is different and partly wraps according to claim 1 or 2, wherein the protective material is a precast member, and is pushed and installed along an existing buried pipe where a portion to be wrapped with a new pipe is cut. Pipe reconstruction method.

Images