JP3395995B2 - Wall construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall construction method, and in particular,
The present invention relates to installation of a water blocking film that prevents water from leaking from the joint surface between the preceding panel and the following panel.

[0002]

2. Description of the Related Art In the construction of a continuous wall construction method, a plurality of leading panels are formed at predetermined intervals, and then a trailing panel is formed between the leading panels. Then, in order to prevent water from leaking from the joint surface due to the formation of a bentonite coating film on the joint surface (joint) between the preceding panel and the following panel, a water blocking film or a water blocking plate. Has been installed. This is because water leakage from the joint surface of the leading panel and the trailing panel adversely affects the strength of the connecting wall,
In particular, the thinner the wall thickness of the connecting wall, the more pronounced the (bad) effect.

[0003]

However, in the prior art, it was very difficult to install the water blocking film, and it was necessary to repeat the complicated work. Therefore, there has been a demand for a technique capable of easily installing a water blocking film at the time of construction of a continuous wall construction method, but such a technique has not been proposed yet.

The present invention has been proposed in view of the above problems of the prior art, and an object of the present invention is to provide a technology capable of easily installing a water blocking film during construction of a wall construction method.

[0005]

According to the method of the present invention for connecting walls, a connecting wall groove excavating step for excavating a connecting wall groove to be a preceding panel and a cage for building a cage in the excavated connecting wall groove. Including the building step, the cage is composed of a continuous vertical strip, a horizontal strip and a spacing member, and during the cage building step, A part of the excavation surface on the side connected to the trailing panel is excavated by a cross jet for a predetermined distance, and a water stop film is inserted in the part excavated by the cross jet.

Further, according to the wall method of the present invention, the wall groove to be the leading panel is excavated, and at the same time, a part of the excavation surface on the side connected to the trailing panel is excavated by the cross jet for a predetermined distance. However, the method includes a step of inserting a water blocking film into a portion excavated by the cross jet and a step of constructing a cage in the excavated connecting wall groove, wherein the cage is continuous in a longitudinal direction. It is composed of a strip, a transverse strip and a spacing member.

Further, according to the wall construction method of the present invention, at the same time as excavating the wall groove to be the preceding panel, a part of the excavation surface on the side connected to the trailing panel is excavated by the cross jet for a predetermined distance. And a step of building a cage in the excavated communicating wall groove and at the same time inserting a water stop film in the region excavated by the cross jet, the cage having a continuous longitudinal direction. It is composed of a strip, a transverse strip and a spacing member.

In carrying out the present invention, as the excavating means for carrying out the continuous wall trench excavating step, any known excavating equipment can be used, but other than the so-called "bucket type" excavating machine is used. Preferably.

Further, in carrying out the step of inserting the water blocking film, the water blocking film is wound around a reel or the like, the reel is installed at a work site, and the water blocking film is inserted by rotating the reel. Is preferred.

When excavating a part of the excavation surface on the side connected to the trailing panel by the cross jet for a predetermined distance, a width and depth necessary and sufficient for inserting the water stop film on the excavation surface are provided. The cross jets are preferably jetted so as to form the slits that they have. More specifically, the "part of the excavation surface" excavated by the cross jet means a region having a width slightly larger than the thickness dimension of the water stop film, and the "predetermined distance". Is an outline of the width dimension of the waterproof membrane 1
This means a digging distance of / 2.

In carrying out the present invention, the water blocking film is preferably wound around a reel or the like.

Here, it is preferable to use the technique disclosed in Japanese Patent Application No. 6-5534 previously filed by the applicant of the present invention for the cage building step.

[0013]

According to the continuous wall construction method of the present invention having the above-mentioned structure, the continuous wall groove is excavated as the preceding panel, and the cage is built in the excavated continuous wall groove. Here, since the cage is composed of a continuous vertical strip, a horizontal strip, and a spacing member, a continuous vertical strip is formed in the continuous wall groove during the cage building step. Directional strips are inserted. When this vertical strip is inserted, a so-called cross jet is ejected from a pair of nozzles arranged at intervals in the vertical direction to excavate the side connected to the trailing panel of the excavated wall groove. A part of the surface is excavated by a cross jet for a predetermined distance to form a slit for inserting a water stop film. Then, a water blocking film may be inserted into the formed slit.

Further, according to the connecting wall construction method of the present invention, at the same time as excavating the connecting wall groove to be the preceding panel, a part of the excavation surface on the side connected to the trailing panel is excavated by the cross jet for a predetermined distance. However, it is possible to form the slit by the cross jet and insert the water blocking film into the slit.

Further, according to the present invention, the slit is excavated by the cross jet at the same time as the drilling of the continuous wall groove, and the waterproof film is inserted into the slit at the same time when the longitudinal strip is built.

That is, according to the present invention, the slit having a width and a depth necessary and sufficient for inserting the water blocking film is formed in the excavation surface of the continuous wall groove excavated in the continuous wall groove excavation step (joining with the trailing panel). Surface), and a water blocking film is inserted at that location. Therefore, it is not necessary to install a partition plate, throw in crushed stones, remove members when excavating a connecting wall groove for a trailing panel, and the like, which makes the work easier.

Here, when excavating the slit into which the water blocking film is inserted, if the depth of the slit is too deep, the excavation work of the connecting wall groove for the trailing panel and the like will be adversely affected, which is very inconvenient. . However, in the present invention, excavation of the slit uses a cross jet, and the cross jet can control the excavation distance with extremely high accuracy. Therefore, the depth of the slit has an appropriate value.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the ground G on which the connecting wall is to be constructed.
First, the continuous wall groove H for the preceding panel is excavated. Here, the excavation of the continuous wall groove H is performed by a known excavating device indicated by reference numeral 10 as a whole. The excavator 10 is a so-called "bucket type".
Any type of excavator other than the above excavators can be used.

When the excavation trench H has been excavated to a predetermined depth level, the excavation device 10 is pulled up, and the strip material attaching device 12 as shown in FIG. In the illustrated embodiment, regarding the construction of the strip material or the cage, for example, Japanese Patent Application No. 6-
The technology disclosed in No. 5534 is used, and the building process will be described later.

In FIG. 2, a strip attaching apparatus indicated by reference numeral 12 has a plurality of vertical strips 6 ... (A mode for constructing a cage using these vertical strips 6 will be described later). It includes a support member 14 attached and a monitor unit 16. The monitor unit 16 includes a pair of nozzles 18A and 18B arranged at a predetermined interval in the vertical direction,
Jets JA and JB are jetted from the nozzles 18A and 18B, respectively. The jets JA and JB form a so-called "crossed jet". This jet JA, JB (cross jet)
As a result, the slits H2 are excavated on both end sides (surface sides connected to the trailing panel) of the communicating wall groove H.

The monitor 16 is provided with a water blocking film holding portion 20, and a water blocking film 22 is attached to the holding portion 20. The waterproof film holding portion 20 is arranged so that the strip attaching device 12 descends in the communicating wall groove H and, at the same time, is inserted together with the waterproof film 22 into the slit H2 excavated by the cross jets JA and JB. Has been done. In addition,
Reference numeral 24 is a hose for supplying the liquid forming the jets from the nozzles 18A and 18B.

The strip attachment device 12 as described above is used as the connecting wall groove H.
Reaches the bottom HB of the cage and a cage (not shown) is built in
Further, if the water blocking film 22 and the water blocking film 22 are arranged in the communicating wall groove H,
Place concrete. As shown in FIG. 3, the water blocking film 22 is provided on the reel 3 provided near the opening of the connecting wall groove H.
It is wound around 0 and is inserted into and lowered into the connecting wall groove H by rotating the reel 30 in the direction of arrow CW.

Next, with reference to FIG. 4, the cage building process will be described in more detail. In addition, for simplification of description, FIG.
The slit H2 and the water blocking film 22 are not shown in FIG.

In FIG. 4, above the opening of the connecting wall groove H, a spacer holder 101 having upper and lower openings slightly smaller than the opening is installed by means not shown. Spacers 110 are stacked and housed inside the spacer holder 101, and the four corners of the spacers 110 are connected to each other at predetermined intervals C by high tension wires (for example, Tegs) 102. The pair of through-holes 114 formed in the spacer 110 has a tensile strength and flexibility wound around a reel (not shown in FIG. 4) and made of, for example, a carbon fiber vertical strip. 6 is inserted. The inner diameter of the through hole 114 is formed sufficiently larger than the outer diameter of the vertical strip 6.

When the cage D is built, for example, when the space C between the adjacent spacers 110 is too long, it is preferable to prevent the bending of the strip 6 by using the positioning member 4.
The spacer 110 is made of a material having tensile strength and flexibility, but the positioning member 4 is usually made of plastic or the like.

When the cage D is built in the manner shown in FIG. 4, a plurality of strips 6 and 6 wound around a reel (not shown).
, Are inserted into the through holes 114 of the plurality of spacers 110, 110 accommodated in the spacer holder 101, and the lower end portion is fixed to the lowest spacer (not shown) by any means. Then, by rotating the reel, the longitudinal strips 6, 6 ... Are drawn out, and the spacers 110 ... Are sequentially pulled down from the spacer holder 1 and lowered.

The lower ends of the longitudinal strips 6, 6 ...
When the bottom of the strip 6 is reached, the tops of the strips 6 and the uppermost spacer 110Z are fixed by a known cone-shaped wedge 109, and a cage indicated by reference numeral D is assembled. Then, concrete is poured to form a connecting wall (not shown). When placing this concrete, the upper spacers of the lowest spacers are pushed up by the concrete,
The four high tension wires 102 maintain the distance between the spacers at a predetermined distance C against the pushing force.

Next, a second embodiment of the present invention will be described with reference to FIG. It should be noted that the same components as those in the embodiment of FIGS. 1-4 are designated by similar reference numerals.

In FIG. 5, the excavating device 10A for excavating the continuous wall groove H is substantially the same as the excavating device 10 shown in FIG. 1, but jets J1 and J2 forming a cross jet are ejected to the excavating device 10A. A pair of nozzles (in FIG. 5, the nozzle state is not clearly shown) and a water blocking film holding portion 20A for supporting the water blocking film 22 are provided.

By the cross jets jetted from the nozzle,
The side connected to the trailing panel is excavated with a predetermined width and a predetermined depth dimension, and the slit H2 is formed by lowering the excavation device 10A. Then, the water blocking film holding portion 20A and the water blocking film 22 are inserted into the slit H2.
Then, when the engagement between the water blocking film 22 and the water blocking film holding portion 20A is released by a release mechanism (not shown), the inside of the connecting wall groove H becomes
The water blocking film 22 is placed in the slit H2 (FIG. 5). After that, the rebar cage is built in the manner shown in FIG.

6 and 7 show a third embodiment of the present invention.

In FIG. 6, the excavating device 10B for excavating the continuous wall groove H has substantially the same structure as the excavating device 10A in FIG. 5, and a pair of nozzles (nozzles) for ejecting jets J1 and J2 forming a cross jet. The situation has not been clearly shown). Then, the cross jet (J
1, J2), the side connected to the trailing panel is excavated with a predetermined width and a predetermined depth dimension, and the slit H2 is formed by lowering the excavating device 10A. This slit H2 is a slit for inserting a water blocking film.

However, the excavating device 10B of FIG. 6 does not have a member corresponding to the water stop film holding portion 20A of the excavating device 10A of FIG. Do not insert.

When the excavation by the excavator 10B is completed, the continuous wall groove H having the slit H2 is formed. Then, in the connecting wall groove H, the strip material attaching device 1 as shown in FIG.
Insert 2B.

The strip attachment device 12B shown in FIG. 7 has substantially the same structure as the strip attachment device 12 shown in FIG. That is, it includes a support member 14 to which a plurality of vertical strips 6 ... Are attached, and a monitor unit 16. The monitor unit 16 is provided with a water stop film holding unit 20, and a water stop film 22. Is attached. Then, in the water stop film holding portion 20, the cross jets J1 and J2 injected from the excavation device 10B of FIG.
It is inserted together with the water stop film 22 into the slit H2 excavated by.

However, this strip attaching device 12B is shown in FIG.
Unlike the device 12 of No. 1, it does not have a pair of nozzles forming a cross jet and, in connection therewith, no hose for supplying the liquid forming the jet is required.

When the strip attaching device 12B as described above reaches the bottom portion HB of the connecting wall groove H and a cage (not shown) is built in, concrete is poured. In addition, the water stop film 2
As shown in FIG. 3, 2 is wound around a reel 30 provided near the opening of the connecting wall groove H, and the reel 30 is indicated by an arrow CW.
By rotating in the direction, it is inserted and lowered into the connecting wall groove H. Further, the building of the cage is performed in the same manner as described with reference to FIG.

It should be noted that the illustrated embodiment is merely an example and does not limit the technical scope of the present invention. For example, for building a cage, see Fig. 4 or Japanese Patent Application No. 6-5.
It is not necessary to limit to the technology disclosed in No. 534.

[0040]

The effects of the present invention are listed below.

(1) Installation of the waterproof membrane is extremely easy and reliable.

(2) There is no need for complicated work such as installation of a partition plate and introduction of quarry.

(3) Since the slits on which the water blocking film is installed are excavated by a cross jet, it is possible to prevent the depth dimension of the slits from becoming unnecessarily large, which adversely affects the strength of the trailing panel or the entire connecting wall. There is no fear.

(4) The labor and cost spent for forming the connecting wall can be kept low.

[Brief description of drawings]

FIG. 1 is a front view showing a continuous wall trench excavation process in a first embodiment of the present invention.

FIG. 2 is a front view showing a cage building step in the first embodiment of the present invention.

FIG. 3 is a side view showing one embodiment of insertion of a waterproof membrane.

FIG. 4 is a perspective view showing one aspect of building a cage.

FIG. 5 is a front view showing a continuous wall groove excavation process in the second embodiment of the present invention.

FIG. 6 is a front view showing a continuous wall groove excavation process in the third embodiment of the present invention.

FIG. 7 is a front view showing a cage building step in the third embodiment of the present invention.

[Explanation of symbols]

G: The ground where a continuous wall should be constructed H ... Wall groove for preceding panel H2 ... Slit for inserting the waterproof membrane C: Space between adjacent spacers D: cage 6 ... Longitudinal strip 10, 10A, 10B ... Excavator 12, 12B ... Strip attachment device 14 ... Support material 16 ... Monitor section 18A, 18B ... Nozzle J1, J2, JA, JB ... Jet (cross jet) 20 ... Water stop film holding part 22 ... Water stop film 24 ... Hose 30 ... Reel for winding the waterproof film 101: Spacer holder 102 ... High tension wire 110 ... Spacer 110Z ... Top spacer 114 ... through hole

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 5/20 102 E02D 5/20 103 E02D 5/18 102

Claims (3)

(57) [Claims] 1. A continuous wall groove excavating step of excavating a continuous wall groove to be a preceding panel, and a cage building step of building a cage in the excavated continuous wall groove, the cage being continuous. It is composed of vertical strips, horizontal strips, and spacing members, and the excavation surface on the side connected with the trailing panel of the excavated wall groove at the time of the cage building step. A continuous wall construction method characterized in that a part of a cross jet is excavated for a predetermined distance, and a water blocking film is inserted into a portion excavated by the cross jet. 2. At the same time as excavating a continuous wall groove to be a leading panel, a part of an excavation surface on the side connected to a trailing panel is excavated by a cross jet for a predetermined distance, and the cross jet is excavated. Including a step of inserting a water blocking film into the open part and a step of building a cage in the excavated connecting wall groove, wherein the cage has a continuous vertical strip and a horizontal strip. A wall construction method characterized by being composed of a spacing material. 3. A step of excavating a continuous wall groove to be a leading panel, and at the same time, excavating a part of an excavation surface on a side connected to a trailing panel by a cross jet for a predetermined distance, and a step of excavating a continuous wall. At the same time as building the cage in the wall groove, and inserting a waterproofing film in the region excavated by the cross jet, the cage having a continuous longitudinal strip and a lateral strip and A wall construction method characterized by being composed of a spacing material.