JPH04134553U - Installation structure of manhole for secondary shield lining - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to obtain a manhole mounting structure for shield secondary lining, which allows manholes to be easily installed on new pipes with secondary lining. [Structure] A straight manhole pipe 1 having a smaller diameter d than the pipe 1 newly installed by the secondary shield lining is attached to a tangent T vertically rising from the side of the pipe 1 newly installed by the secondary shield lining. The peripheral wall 2A of the manhole straight pipe 2 is installed so as to match, and the periphery of the joining through hole 3 opened in the new pipe 1 and the lower end surface of the manhole straight pipe 2 are connected to the lining material 4.
The opening edge and the end edge contact in the tangential direction facilitate temporary support and simplify construction.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea relates to the mounting structure of manholes for secondary shield lining. Regarding improvements to the mounting structure of newly constructed manholes.

0002

[Conventional technology]

Conventionally, a new lining with a smaller outer diameter was installed within the segment as a secondary lining for the shield. Insert the tube and inject air mortar etc. into the gap between the outer surface of the new tube and the inner surface of the segment. Secondary shield lining, in which the pipe is cured and the pipe is restored, is widely practiced.

0003 It is necessary to install manholes for inspection at each important point in the secondary shield lining mentioned above. However, the conventional installation structure for this manhole was to assemble reinforcing bars as shown in Figure 2. After assembling the formwork, inject mortar etc. and harden it to construct the manhole M. things were being done.

0004

[Problems with conventional technology]

However, construction work in a narrow space is very time-consuming and takes a long time. It has the disadvantage that it becomes long and construction is troublesome. Furthermore, the connection between the base M1 of the manhole M, the secondary lining pipe C, and even the segment A Seals D and F between them also have to be done manually after removing the formwork, so work efficiency is low. was there.

[0005]

[Problems that the invention aims to solve]

In view of the above problems, this idea was developed to easily provide a manhole for new pipes with secondary lining. The aim is to obtain a manhole mounting structure for secondary shield lining that can provide This was done as a target.

[0006]

[Means to solve the problem] In other words, the mounting structure of the manhole for secondary shield lining of this invention is The manhole straight pipe, which has a smaller diameter than the newly installed pipe due to lining, is installed in the shield 2. Next, the manhole is placed on a tangent line that stands up vertically from the side of the newly installed pipe due to lining. The peripheral edge of the joining through hole opened in the newly installed pipe, which is installed with the peripheral walls of the straight pipe aligned. and the lower end surface of the straight manhole pipe are joined with a lining material and an adhesive. It is characterized by:

[0007]

【Example】

Next, an example of this invention will be described. FIG. 1 is a sectional view of an embodiment of this invention. The mounting structure of the manhole for secondary shield lining of this invention is suitable for secondary shield lining. The manhole straight pipe 2, which has a smaller diameter d than the newly installed pipe 1, has a secondary shield cover. A manhole is attached to the tangent T that stands up vertically from the side 1A of the newly installed pipe 1. A through hole for joining is installed in the newly installed pipe 1 by aligning the peripheral wall 2A of the straight pipe 2. 3. The periphery and the lower end surface 2B of the manhole straight pipe 2 are lined with reinforced resin or the like. 4 and are joined with an adhesive 5. In addition, in the figure, 6 is an old pipe, 7 is a graft layer, and 2C...2C is a straight pipe for a manhole. 2 shows the steps pre-installed inside.

[0008]

[Effect]

When implementing the secondary shield lining manhole mounting structure of this invention, first A through hole is opened in the decayed pipe 6, the graft layer 7, and the new pipe 1 so as to be biased toward one side of the peripheral wall thereof. Ru. Next, cut the lower end of the straight pipe 2 for the manhole according to the curvature of the new pipe as shown in the figure. erected on the At this time, one lower end 2T of the manhole straight pipe 2 is connected to the new pipe 1. It rides on the periphery of the opened through hole 3 and is located on the tangent line, so the load is vertical in this part. This makes temporary support very easy. While supporting in this state, apply the inner lining material and glue them together with adhesive 5 and seal. It is to do so.

[0009]

[Effect of the idea]

As explained above, this idea is to install a manhole in a newly constructed pipeline using secondary lining. When installing a manhole pipe, connect the manhole pipe prepared in advance directly to the through hole 3 opened in the new pipe 1. If you place it on the periphery and seal the base, it dries, making installation very easy, and The manhole pipe is supported in the tangential direction of the cross section of the new pipe 1 with respect to the opening of the new pipe 1. This makes the support very stable, and temporary support can be done safely, making the work very easy. It has various practical effects such as:

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

1 Newly installed pipe with secondary shield lining 1A side 2 Straight pipe for manhole 2A Peripheral wall 3 Through hole for joining 4 Back lining material 5 Adhesive d Diameter of straight pipe for manhole T tangent 6 Old pipes 7 Graft layer

Claims (1)

[Scope of utility model registration request] Claim 1: A manhole straight pipe having a smaller diameter than the newly installed pipe due to the secondary shield lining is attached to a tangent line vertically rising from the side of the newly installed pipe due to the secondary shield lining. The pipes are installed with their peripheral walls aligned, and the peripheral edge of the joining through hole opened in the new pipe and the lower end surface of the straight pipe for manhole are joined with a lining material and an adhesive. Mounting structure of manhole for secondary shield lining.