JPS599384A - Method of repair construction of drain pipe - 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 novel method for repairing a υF waterway, and more particularly to a method for repairing a u1 waterway that repairs a positive waterway without requiring excavation.

The u1 waterway, which was buried under rising water, deteriorates over time. For example, due to aging, erosion occurs on the inner surface of the waterway,
Tonosho also causes deformation and destruction of waterways. Furthermore, the slope of the waterway changes depending on the ground quality. Join υF
Water leaks occur due to the corrosion resistance of joint materials in waterways. With this water leakage, earth and sand around the pipes are allowed to flow in, causing loosening of the k-way. These dilapidated pipes will be replaced or discarded and a new Cedar 1 waterway will be installed. Conventionally, pipeline replacement is carried out using the cut-and-cover method.

The cut-and-cover method is used when there is no structure above the drainage channel or when the function of some structures can be stopped for a certain period of time, and when the structure is relatively inexpensive. According to this cut-and-cut construction method, the entire waterway is excavated and replaced, or only severely damaged sections are replaced. However, this construction method requires a huge amount of construction cost and construction time, including retaining work to deal with the loosening of the surrounding ground caused by re-excavation. Therefore, not only will it have an impact on surrounding buildings, but -1) If some of the structures are public roads, the use of the structures and the noise will cause a great deal of inconvenience to users until the construction is completed. Furthermore, it is difficult to take appropriate measures in the event of a sudden rise in water during construction. If the open-cut method cannot be used, a new waterway will be constructed separately, but compared to the open-cut method, a larger amount of money will be required to secure the site, so it will not be necessary to construct it along with other major construction work. This is virtually impossible unless you do it. The present invention has been made in view of these shortcomings in the prior art, and its first objective is to: Repair DI wood pipes that are capable of repairing drain pipes destroyed by pressure without excavating them. We provide construction methods.

In order to achieve the above object, the present invention expands the conduit at the shirt king and creates an adjusted wood pipe with a diameter smaller than the initial diameter and a divided support steel pipe. The special feature is to install them inside the building and integrate them.

A preferred embodiment of the present invention will be explained in detail to you with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a drain pipe 1 that has been destroyed by upper pressure. This drainage pipe has been damaged due to water leakage and sediment inflow due to poor construction and aging of the joints.

It was destroyed by the earth pressure that created voids in the earth and sand around the pipe, and the vertical diameter D' was about 75% of the normal channel diameter at the time of construction. When repairing such a drain pipe 1, as shown in Fig. 2, a supporting steel scrap 2 having a pipe diameter of 90 to 95% of the normal waterway diameter is cut into quarters and temporarily installed from the bottom of the tJl channel. After that, for example, 4 to 8 100 to 400 ton hydraulic jacks are combined to perform shirt kinging until the diameter approaches the initial diameter.

At this time, as shown in Fig. 3, if the jack base is held by an H-shaped net 4.4 which is longer than the length of the unit waterway, has a length in the longitudinal direction, and has claw dimensions of about 300 mm x 300 mm, it is possible to The changed part 5.5 is corrected to a normal slope by jacking. After reaching 90 to 95% of the normal diameter of the water channel in the shirt king, the four-split support steel pipe 2 is welded to one side to complete the installation. In addition,
FIG. 4 is a sectional view showing in detail the state of jacking by the hydraulic jack 6. The length of the support fJr4 pipe 2 is the relationship between drawing from the downstream manhole - 11000mm - 1500m
The thickness is approximately 20 mm since a pressure of approximately 100 to 400 tons is partially applied.

However, these dimensions and shapes are merely examples, and the present invention is not limited thereto. Closely attached to υ1 water pipe l! O
At the joint of the installed four-split support steel pipe 2, a step is created due to lap welding, and the sloped portion of the bottom surface is also uneven. In order to solve this problem, an adjustment main pipe 7 is installed inside the support ε11 pipe 2. Since the adjustment main pipe 7 is to be installed to adjust the slope and bends in the left and right directions, it should be installed with a diameter d that is 80 to 85% of the normal waterway diameter, as shown in Figure 5. use Either the waterway diameter becomes smaller due to the installation of the adjustment main pipe 7, or because the adjustment main pipe 7 is made of steel, the roughness coefficient is different from that of the concrete drainage pipe 1.

Therefore, even if the cross-sectional area is reduced, the flow velocity increases, so there is little effect on the flow rate. When installing the adjustment main pipe 7, after measuring the correct slope and the horizontal deviation of the support steel pipe 2, determine the greatest common divisor position, and use spacers 8 to secure the position as shown in Fig. 6. Hold it in place and weld it on. In addition, the pipe diameter and number of split ends of the adjustment main pipe 7 are determined by examining the delivery and lead-in conditions to the installation point. Thereafter, the adjusted wood pipe 7 is temporarily assembled and the lead-in 4j is installed. Next, as shown in FIG. 7, four grout nozzles 9 are installed, one in each unit of the drainage channel, and the grout nozzles 9 are injected, thereby integrating the water channel and the regulating main pipe 7.

If there is a gap between the support steel pipe 2 and the drainage channel when the support steel pipe 2 is installed, it is possible to install a grout hole with a diameter of about 3 cm in the support steel pipe 2 in advance so that the gap can be removed through the adjustment main pipe 7. The gap is filled when the medicine is dispensed. In addition,
If an air valve is installed in the adjusting wood pipe to remove air, the medicine will be poured evenly. If the degree of destruction of the drain pipe 1 is large, for example, as shown in Figure 8, if the diameter D' of the damaged water pipe υ1 is 90% or more of the original diameter, expansion work of the drainage can be carried out. Adjust the support tube to make the device. When installing the adjustment support pipe, as shown in Fig. 9, chemical injection nozzles 10 are installed at a rate of 4 nozzles per one location in each unit of the drainage channel, and cement-based hardening agent is injected into the outside of the drainage channel 1. . At the same time, the left and right deviations of the internal gradient and the degree of fracture are measured, and the adjustment support tube 11 is installed at a position where the diameter of the adjustment support tube 11 can be maximized. The cut and length of the steel pipe to be used as the adjustment support pipe 11 are determined by examining the conditions of delivery and delivery to the installation point, as well as the dimensions and shape of the cross-section of the official manhole, as well as the adjustment water T7.・Determined by J. Further, when installing the adjustment support pipe 11, the gap with the drainage channel is adjusted using a spacer 15 welded to the adjustment support pipe 11 having the required dimensions measured in advance as shown in FIG. The spacer 11 serves to position the support tube 11 at a target position. After the adjustment support pipe 11 is installed, a grout nozzle 9 is provided at one location in each middle of the drain pipe 1 to inject a cement-based hardening agent to integrate the drainage channel and the adjustment support pipe 11. At this time, the adjustment support tube 11 is lowered by the injection operation so that the internal pressure is lowered and the cloud is evenly filled.
Filling becomes easier by providing air valves at required locations.

FIG. 11 is a cross-sectional view showing how the end portion of the adjustment support tube 11 is sealed. That is, the sealing cement 12 and the UG grout 13 perform gear sliding with the drainage channel, and at the same time, a grout stopper is formed, and a more precise water stop is performed. For drain pipes 1 in the early stage of destruction where erosion is seen only at the joints of the drain passages, water can be stopped using seal cement 12 and UG grout 13 as shown in Figure 12.13. , Also, if there are vertical cracks as shown in Fig. 14, after applying 11-water to the cracks, #
J + Nozzles are installed at 4 locations per unit of waterway, and a cement hardening agent is injected into the outside of υ1 water pipe 1. Increase pressure and prolong life! Plan. In addition, 1 in the figure
4 indicates cell coat.

Furthermore, by applying a mixture of epoxy resin and glass-based resin to the steel pipe section, stronger inner surface protection can be achieved. Furthermore, it is necessary to stop the water supply to the manhole as well as the distribution channel to prevent 1JrI water and sediment from flowing into the manhole. Figures 15 to 17 are cross-sectional views showing the state of water stoppage at the manhole floor slab joint, manhole side block joint, and manhole frame crack, respectively. Ru. Of course, depending on the degree of damage to the manhole, it is possible to provide a complete water stoppage using a steel pipe in the same way as the drain pipe l. In addition, FIG. 18 is a sectional view schematically showing how the adjustment wood pipe 7 is pulled in when the drainage pipe l is damaged and needs to be repaired by jacking up. The adjustment main pipe 7 is shown being drawn in. Also, Figure 19 shows crane 1
7 is a cross-sectional view schematically showing the operation of inserting the adjustment support tube 11 from the large hole and pulling it into the repaired area using the adjustment support tube 7. FIG.

``The present invention expands the destroyed drain pipe by jacking, divides the support steel pipe with a diameter smaller than the original diameter, temporarily installs it in the drain pipe, welds it, and then installs the adjusted wooden pipe. For example, even if about 75% of the original drainage pipe is destroyed, the υ1 waterway retains its original function without the need for excavation. It has the effect of restoring.

In addition, the cost is sufficiently lower than that of the two open-cut methods.

Furthermore, after the diameter is brought closer to the normal diameter, this shape is maintained and the next process is carried out, which improves work safety.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an example of a υ1 water pipe that has been destroyed due to upper pressure, Fig. 2 is a cross-sectional view of an example of a drain pipe supported by a supporting steel pipe according to the present invention, and Fig. 3 is a jack-up Fig. 4 is a sectional side view of an embodiment of the present invention showing a method of correcting a slope; Fig. 5 is a sectional view of an embodiment of the invention showing jacking; FIG. 6 is a cross-sectional view of an embodiment of the present invention showing how the adjustable wood pipe is supported by a spacer. FIG. 7 is a cross-sectional view of an embodiment of the present invention showing how to perform chemical injection. FIG. 8 is a cross-sectional view showing an example of a drain pipe with little damage. FIG. 9 is a cross-sectional view of an embodiment of the present invention showing how the 1-o adjustment support pipe is installed and medicine is injected. FIG. 10 is a sectional view of an embodiment of the present invention showing how the adjustment support tube is held by a spacer, and FIG. 11 is a sectional view of an embodiment of the invention showing how the end portion of the adjustment support tube is sealed. , FIG. 12 is a partial cross-sectional view of one embodiment of the present invention showing how water is stopped when a joint is slightly damaged;
Figure 3 is a partial cross-sectional view of an embodiment of the present invention showing water stoppage for a joint of a different type from the joint shown in Figure 12, and Figure 14 is a partial sectional view of the present invention showing water stoppage of a vertical crack in a pipe. FIG. 3 is a partial cross-sectional view of one embodiment of the invention. Fig. 15 is a partial sectional view of an embodiment of the present invention showing water supply at the manhole slab joint, and Fig. 16 is a partial cross-sectional view showing water stoppage at the manhole side block joint. A partial cross-sectional view of. Fig. 17 is a cross-sectional view of an embodiment of the present invention showing how water is stopped in a manhole skeleton crack; Fig. 18 is a cross-sectional view of an embodiment of the present invention showing how the adjustment wood pipe is drawn in; Fig. 19 The figure is a cross-sectional view of an embodiment of the present invention showing how the adjustment support tube is drawn through the manhole. Here, l...° drain pipe, 2... support steel pipe, 6...
・Jacket, 7... Adjustment woodwind, 8... Spacer,
9... Grout nozzle, 10... Chemical injection nozzle, 11
...Adjustment support pipe, 12...Seal cement, 13.
...UG Grau I. Patent Applicant Mitsuru Kubo Figure 3 Figure 7 Cause 8; 1j9 Figure 10 Figure 11 Figure 42) 4 Figure 131 1 Figure 14 Figure 15 Figure 2,'; 16 Figure

Claims (2)

[Claims] (1) Drainage buried underground) 1. Repair 1. The upper part of the tJl wood pipe was jacked to a diameter close to the normal diameter, and the pipe was divided into parts with a smaller diameter than the normal diameter listed in 11j. a step of attaching a support steel pipe to the drain pipe; a process of welding and integrating the previously installed support pipe; and installing an adjustment wood pipe within the welded support steel pipe.
and a step of injecting a filling material to integrate the υ1 wood pipe and the regulating main pipe. (2) A method for repairing D1 water pipes buried underground,
a step of bringing the drain pipe closer to its normal diameter by jacking, a step of installing a chemical injection nozzle in the water pipe to maintain the normal diameter and applying a curing agent to the outside of the drain pipe; A step of attaching a divided support steel pipe having a diameter smaller than the pipe diameter into the drain pipe, a step of welding and integrating the support steel pipes installed in A.1, and adjustment within the welded support steel pipe. A method for repairing a water pipe, which comprises a step of laying a wooden pipe, and a step of injecting a filling substance to integrate the drain pipe and the adjusting wood pipe.