JPH03146481A - Method for curing mortar in mortar lining method for pipeline - Google Patents

Abstract

PURPOSE:To shorten the time for curing mortar by applying the mortar on the inside surface of a pipe and inserting a tube of a synthetic resin film into the pipe, then packing high-temp. water into the tube and removing the tube after curing the mortar. CONSTITUTION:A lining machine 7 is set in the pipe 1 which is internally cleaned at need. While the machine is pulled at a specified speed by a power winch 8, the mortar 9 contg. a curing accelerator is sprayed and applied at need on the inside surface of the pipe 1 and simultaneously the thickness is uniformized by a trowel 10 mounted at the front end of the lining machine 7 to form the lining layer of the mortar 9 having a uniform thickness on the inside surface of the pipe 1. The tube 14 of the synthetic film is inserted into the pipe 1 and thereafter, the high-temp. water of about 70 deg.C is packed into the tube 14 and the mortar 9 is cured by heating. The tube 14 is removed upon curing of the mortar 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for forming a mortar lining layer on the inner surface of a conduit such as an aged water pipe.

[Traditional technical chief and its challenges]

The mortar lining construction method described above uses mortar, which is an inorganic material, as the lining material, so it has excellent advantages such as ensuring safe water, good corrosion resistance, and low construction costs.

However, with the mortar lining method, the mortar takes a long time to harden, so water is cut off for long periods of time. For this reason, in the case of the mortar lining method, it is necessary to install temporary pipes on the road or in the side ditches in the construction section to avoid long-term water outages. It was a big problem.

For this reason, various hardening accelerators have been developed to accelerate the w11 hardening of mortar, but they have a long pot life and
Since the curing time cannot be shortened, the installation of temporary pipes has not been omitted.

Therefore, the present invention aims to enable mortar lining without installing a temporary pipe by providing a method for accelerating the curing time of mortar after applying mortar.

[Means to solve the problem]

In order to solve the above problems, this invention applies mortar to the inner surface of the pipe, inserts a synthetic resin film tube into the pipe from one end, and fills the tube with high-temperature water. The mortar was cured by heating, and the tube was pulled out after the mortar had hardened.

[Effect]

According to the above method, since the mortar is heated and cured, the mortar hardens in an extremely short time, and there is no need to install a temporary pipe.

〔Example〕

Next, an embodiment of the present invention will be described in the case where an existing water pipe is rehabilitated by the mortar lining method.

First, we will investigate the water control valves, stop valves, etc. of the existing pipelines, and
Determine the excavation location.

Then, as shown in FIG. 1, both ends of the construction section are excavated and the pipe 1 is cut by about 1 m. By installing intake ports 2, temporary pulp 3, etc., the water cut-off area will be limited to the construction section only.

After this, the outlet 2 on the construction pipe side is removed and the water in the pipe 1 is drained. After threading the rope using a wire threading machine, etc., as shown in Figure 2, while pulling the scraper 4 and wire brush with a power winch 5.6, scrape off limescale, dirt, etc. Remove by flowing pressure water into pipe 1,
Wash the bronzer with a power winch 5.6
Tow the pipe with the pipe 1 and drain the water left inside the pipe 1.

After cleaning the inside of the pipe 1 in this way, as shown in FIG. 3, the lining machine 7 is set inside the pipe 1,
The mortar S is sprayed onto the inner surface of the tube 1 while being pulled at a constant speed by a power winch 8. The mortar 9 sprayed onto the inner surface of the tube 1 is finished to a uniform thickness by a trowel 10 attached to the tip of the lining machine 7 at the same time as the spraying, thereby forming a lining layer of uniform thickness on the inner surface of the tube 1.

It is desirable that the mortar 9 used here contains a hardening accelerator that accelerates hardening.

When the inside of the pipe 1 is lined as described above, if the pipe has a water distribution faucet 11, the water distribution faucet 11 is blocked by the mortar 9. For this reason, after the above-mentioned lining, as shown in FIG. 4, after closing both ends of the pipe 1, air pressure is applied inside the pipe 1 by the compressor 12, and in this state, each stop valve 13 is opened. , remove the mortar 9 blocking the water faucet 11.

After this, a tube 14 made of a synthetic resin film such as polyethylene is inserted into the tube 1, and about 7
The mortar 9 is heated and cured by filling with high temperature water 15 at 0°C. The tube 14 is inserted into the tube 1 as follows. As shown in FIG. 5, at both ends of the tube 1,
A guide tube 16 bent upward is attached, a pedestal 17 is assembled above one of the guide tubes 16, and a collar 1a is installed on this pedestal 17. The tube 14 is placed over the outer periphery of the collar 18 and firmly fixed with a band, and then the tube 14 is pushed into the collar 18 and reversed.

Then, when high-temperature water 15 is poured into the tube 14 from the hot water wheel 19, the tube 14 is gradually inserted into the tube 1 while being reversed by the water pressure.
Insert the tube 14 to the state shown in the figure. Then, the mortar 9 is heated with high temperature water 15 through the tube 14 in that state.

After confirming that the mortar S has hardened, the tube 14
A valve 2 installed in a guide tube 16 at the tip of the hot water 15 inside
Discharge from 0. After this, the tube 14 is pulled out from the tube 1.

After this, an inspection is performed, the pipe 1 is connected, and water is passed through, and the construction of the mortar lining is completed.

[Effects of the Invention] As described above, according to the present invention, the mortar applied to the inner surface of the pipe is indirectly heated by high-temperature water through the synthetic resin film tube, so that it hardens in a short time. In addition, since there is no water evaporation and the water necessary for the chemical reaction of hardening is secured, complete curing is possible, so a high quality mortar lining layer can be obtained. Furthermore, if the applied mortar has low viscosity and high fluidity, the lining layer will be pressurized from the inside by high-temperature water through the tube.
It also has the effect of creating a dense structure with a uniform thickness and a smooth lining layer.

[Brief explanation of the drawing]

1 to 6 are schematic diagrams showing the steps of the mortar lining method according to the present invention. 1...Tube, 9...Mortar, 14...Synthetic resin film tube,
15... High temperature water.

Claims (2)

[Claims] (1) After applying mortar to the inner surface of the pipe, insert a synthetic resin film tube into the pipe from one end of the pipe, fill this tube with high-temperature water to heat and cure the mortar, and then A mortar hardening method in a conduit mortar lining construction method characterized by pulling out the tube after hardening. (2) The mortar hardening method in the pipe mortar lining construction method according to claim (1), wherein a hardening accelerator is mixed into the mortar.