JPS644910Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Purpose of the invention) The paper drain method is a type of soft ground drainage method, and its material is mostly made of special plastic board. For this reason, it is excellent in economy and workability, but the drawback is that when the casting rod is pulled up, the drain material comes up together, making it difficult to cast accurately in the originally planned position, and it is difficult to confirm the remaining depth (measurement). It has the following drawback.

Among these drawbacks, the main purpose of the present invention is to make it easier to check the residual depth (measurement) after drain material is cast into the ground.

(Structure of the invention) In order to solve the problem of difficulty in measuring the length, a removable measuring member 3 is passed through the water passage hole 2 inside the drain material 1 in advance. After pouring, it can be pulled out and its length measured, making it easy to measure the length. Therefore, the structure of the invention consists of a conventional drain material and a measuring member passed through its water passage hole.

Example 1 When a metal wire is used as the measuring member, it is easy to pull out because there is little friction with the drain material. However, if the drain material breaks in the middle, it cannot be detected.

Example 2 When the measuring member is made of the same material as the drain material or a similar material, the measuring member breaks at the same time as the drain material breaks, so it is possible to detect the intermediate break. However, if the drain material is subjected to strong external force due to foreign objects in the soil, etc., it will be difficult to pull out the measuring member.

Example 3 When two types of materials, a metal wire and a material equivalent to the drain material, are used as the length measuring member, it is possible to check the length and the presence or absence of intermediate breakage of the drain material by pulling out these members.

(Effects of the invention) Malfunctions in installation due to joint upflow of drain material, intermediate breakage, etc. can be confirmed by easy measuring using the invention. If the concrete is not placed in the originally planned position, re-placement will allow for accurate soft ground improvement work.

[Brief explanation of drawings]

Fig. 1 is a plan view, Fig. 2 is an enlarged cross-sectional view AB, and Fig. 3 is a perspective view. Figures 1 to 3, 1... Conventional drain material, 2...
...Water hole, 3...Removable measuring member. Because the drain material is long (approximately 10 cm wide, approximately 3 mm thick, and several hundred meters long), the middle part is shown in Figure 1. This is omitted, and only the end portion is depicted in FIG.

Claims (1)

[Scope of utility model registration request] After the drain material is cast into the ground, the remaining depth of the drain material can be confirmed (measured) by pulling out the removable member installed inside the drain material and measuring its length. , a drain material that can be measured for use in soft ground drain construction methods.