JP5823370B2 - Multi-wall construction method - Google Patents

Description

  The present invention relates to a continuous wall member and a continuous wall construction method.

  Conventionally, as a method for constructing an underground wall, there is a method called a steel underground continuous wall construction method. 7 (a) shows a steel continuous wall member in which a steel joint wall member in which a male joint or a female joint is provided at both ends of a flange of an H-shaped steel material in an excavation part excavating the ground is shown in FIG. As described above, a plurality of the male joints 34 of the other member are inserted into the female joint 33 of the one member and connected to each other (see, for example, Patent Document 1).

  As a steel underground wall construction method, there is a construction method in which a stable liquid is replaced with concrete after a steel continuous wall member is built in an excavated part excavated while being filled with a stable liquid by a stable liquid excavation method. . There is also known a construction method in which a soil mortar is created by an in-situ soil agitation while excavating an excavation part, and a steel continuous wall member is built therein.

  The former method does not limit the period of building the steel continuous wall member for post-filling with concrete, and for example, it may take several days, but for the purpose of increasing the filling property by flowing the concrete Since the male joint of the steel continuous wall member is provided intermittently in the flange height direction, there is a risk of water leaking through the intermittently provided male joint when cracks or the like occur in the concrete.

  Moreover, in the latter method, there is an advantage that it is easy to ensure water stopping without the need to intermittently provide a male joint of a steel continuous wall member, but it is necessary to build a member before the soil mortar solidifies. If the construction period is limited due to road regulations, construction becomes difficult.

JP 2001-254352 A

  Therefore, as a combination of the advantages of these methods, a steel wall member was built in the excavated part that was excavated while being filled with the stable liquid by the stable liquid excavation method, and then the stable liquid was soil mortar (fluidized). A method of replacement with treated soil) is conceivable.

  In this construction method, since the soil mortar is post-filled, the period during which the steel continuous wall member is built is not limited. Moreover, the male joint of the steel continuous wall member is continuously provided in the flange height direction, so that the above-mentioned problem of water stoppage can be avoided. However, in this case, there is a new problem of water stoppage at the joint of the joint due to the reason that the space 35 sandwiched between the female joint 33 and the male joint 34 in FIG. It can happen.

  Therefore, it is conceivable that the space 35 is separately filled with soil mortar, grout or the like as a water-stopping material to ensure water-stopping. When filling the waterstop material, it is necessary to insert a cleaning device such as a jet cleaning rod into the space 35 to perform cleaning, and to remove the soil mortar that has entered during the placement.

  By the way, since the conventional male joint 34 is formed in a T shape as shown in FIG. 7A, a space between the female joint 33 and the male joint 34 is wide as shown in FIG. However, if the male joint 34 is inserted deep into the female joint 33 as shown in FIG. 7B, a space for passing the cleaning device cannot be secured. Therefore, when the steel continuous wall member is installed, it is necessary to have an installation accuracy for securing a space for inserting the cleaning device between the female joint 33 and the male joint 34, and the construction is difficult.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a continuous wall member and the like that can clean the connecting portion of the joint regardless of the mounting accuracy.

In the present invention for achieving the above-described object, a connecting wall member provided with a male joint to be inserted inside a female joint of a connecting wall member to be connected when the connecting wall is constituted by connecting the connecting wall members to each other. And the shape of the said male joint is formed so that it may have a recessed part on a plane, The continuous wall member characterized by the above-mentioned is used .

  In the present invention, regardless of the position of the male joint in the female joint, the space inside the recess of the male joint can be used for insertion of a cleaning device such as a jet cleaning rod, Regardless, the joint connection can be cleaned.

It is desirable that the male joint is formed in an arc shape.
Since the female joint is usually formed in a shape in which a part of the circumference is notched, if the male joint is formed in an arc shape, insertion into the female joint becomes easy.

The present invention relates to the excavation part excavating the ground around a plurality of continuous wall members constructed by inserting the male joint of the other continuous wall member inside the female joint of one continuous wall member and connecting them together. (A) for constructing a continuous wall filled with a filler, and after cleaning the space by inserting a cleaning device into a space sandwiched between the male joint and the female joint, a water stop material is placed in the space. comprising a step (b) of filling, the shape of the male joint, have a plan on the recess, and so that the position within the female fitting of the male joint is variable in the direction of connection the connecting wall member It is the continuous wall construction method characterized by having been formed.

  Thereby, the water stop in the connection part of a joint can be performed reliably. In addition, since the male joint has a concave portion, as described above, it is possible to clean the joint portion of the joint regardless of the mounting accuracy of the connecting wall member.

It is desirable that the male joint is formed in an arc shape.
By forming the male joint in an arc shape, the insertion into the female joint becomes easy as described above.

In the step (a), the ground is excavated while the excavation part is filled with a stabilizing liquid, and the connecting wall member is built in the excavation part, and then the stable liquid is a soil mortar or fluidized as the filler. It is desirable to replace with treated soil.
In this method, since the soil mortar or the like is post-filled, the period during which the continuous wall member is built is not limited, and a male joint can be continuously provided to avoid the above-described water-stopping problem. However, as mentioned above, there may be a problem of water-stopping at the joint of the joint, so as described above, clean and fill with water-stopping material in the space between the female joint and the male joint. It is particularly effective to ensure aqueous properties.

  According to the present invention, it is possible to provide a continuous wall member or the like capable of cleaning the connecting portion of the joint regardless of the mounting accuracy.

The figure shown about the steel connection wall 1 The figure which shows steel continuous wall members 10a and 10b The figure which shows the construction method of the steel connection wall 1 The figure which shows the construction method of the steel connection wall 1 Diagram showing joint connection Diagram showing joint connection Diagram showing joint connection

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Drawing 1 is a figure shown about steel connection wall 1 (continuous wall) using the steel connection wall member of this embodiment. The steel continuous wall 1 is constructed by connecting steel continuous wall members 10a and 10b (continuous wall members), which are H-shaped steel materials, to the excavation part 110 of the ground 100, and the periphery thereof is a filler. Filled with soil mortar 140. It is also possible to use fluidized soil as the filler.

  FIG. 2 is a view showing a plane of the steel continuous wall members 10a and 10b. The steel continuous wall members 10 a and 10 b are steel materials having an H shape in which a center portion in the width direction of a pair of flanges 11 is connected by a web 12, and joints are provided at both ends of the flange 11 in the width direction. A female joint 13 is provided in the steel continuous wall member 10a. The steel joint wall member 10b is provided with a male joint 14 for insertion into the female joint 13 of the steel joint wall member 10a to be connected. In this embodiment, the female joint 13 has a shape in which a part of the circumference is cut out, and the male joint 14 is formed in an arc shape. These joints are provided continuously in the flange height direction.

  As shown in FIG. 1, the steel continuous wall members 10a and 10b are connected by inserting the male joint 14 of the steel continuous wall member 10b into the female joint 13 of the steel continuous wall member 10a.

  A space 21 sandwiched between the female joint 13 and the male joint 14 is filled with a water stop material 22. For example, soil mortar, grout or the like is used as the water-stopping material 22, but the material having a water-stopping function can be appropriately used without being limited thereto. Moreover, in this embodiment, the protective material 23 is arrange | positioned inside the female joint 13 of the steel continuous wall member 10a of an edge part. Since this female joint 13 is used for connection with a steel continuous wall member that will be built in the unexcavated part 120 later, the penetration of the soil mortar 140 is thus prevented.

  Next, with reference to FIG. 3, 4, the construction method of the steel connection wall 1 is demonstrated.

  In order to construct the steel continuous wall 1, first, as shown in FIG. 3A, the ground 100 is excavated to form an excavation part 110. In this embodiment, excavation is performed while the excavation part 110 is filled with the stabilization liquid 130 by the stable liquid excavation method.

  Next, as shown in FIG. 3 (b), the steel connecting wall members 10a and 10b are connected to the inside of the female joint 13 of one member 10a through the male joint 14 of the other member 10b, and the excavation unit 110 Build several in a row. A protective member 23 is disposed inside the female joint 13 of the steel continuous wall member 10a at the end.

  Subsequently, as shown in FIG. 3C, a soil mortar 140 is placed around the steel continuous wall members 10 a and 10 b to replace the stabilizing liquid 130.

  Thereafter, as shown in FIG. 4A, a jet cleaning rod 30 as a cleaning device is inserted into the space 21 sandwiched between the female joint 13 and the male joint 14, and the space 21 is cleaned using this. The soil mortar 140 that has entered the space 21 is removed. The jet cleaning rod 30 cleans the space 21 by jetting high-pressure cleaning water and a brush. However, the cleaning device is not limited to this.

  The figure which shows the connection part of the joint at this time is FIG. 5 (a), (b). In the present embodiment, the male joint 14 is formed in an arc shape and has a planar recess. Accordingly, not only when the male joint 14 is inserted shallowly into the female joint 13 as shown in FIG. 5A, but also the male joint 14 is inserted deeply into the female joint 13 as shown in FIG. In this case, a space for inserting the jet cleaning rod 30 can be secured using the space inside the concave portion of the male joint 14.

  Therefore, the jet cleaning rod 30 can be always inserted into the space 21 and the space 21 can be cleaned regardless of the accuracy of the steel continuous wall members 10a and 10b. For this reason, in the process shown in FIG.3 (b), the steel connection wall members 10a and 10b can be built without paying attention to the position of the male joint 14. FIG.

  In the present embodiment, the jet cleaning rod 30 is assumed to have a maximum diameter of about 40 mm, and the inner circumference of the circular arc portion of the male joint 14 is a circle having a diameter of about 49.5 mm and a circumferential angle of about 201 °. The arc is in the range of. The inner periphery of the female joint 13 has a shape in which a part of the circumference having a diameter of about 82.5 mm is cut out.

  Returning to the description of FIG. After the space 21 is cleaned in FIG. 4A, as shown in FIG. 4B, the space 21 is filled with a water stop material 22 to ensure the water stop of the connecting portion of the joint.

  As described above, according to the present embodiment, since the shape of the male joint 14 is formed in an arc shape, no matter where the male joint 14 is located in the female joint 13, This space can be used for insertion of a cleaning device such as the jet cleaning rod 30, and the connecting portion of the joint can be cleaned regardless of the installation accuracy of the steel continuous wall members 10 a and 10 b. Furthermore, it is easy to insert also into the inside of the female joint 13 which has the shape which notched the circumference.

  When the steel connecting wall 1 is constructed, the space 21 sandwiched between the female joint 13 and the male joint 14 is thus cleaned, and the water-stopping material 22 is filled, so that the water-tightness of the connecting portion of the joint is ensured. it can.

  In addition, by applying the construction method described in the present embodiment, the period of installing the steel continuous wall members 10a and 10b is not limited in order to post-fill the soil mortar 140 when the steel continuous wall 1 is constructed. Moreover, the problem of water stoppage when the male joint 14 of the steel continuous wall member 10b is provided continuously and the male joint is provided intermittently can be avoided. However, as described above, there is a possibility that a water-stopping problem may newly occur at the joint portion of the joint. Therefore, the cleaning of the space 21 sandwiched between the female joint 13 and the male joint 14 and the water-stopping material 22 are performed as described above. It is particularly effective to ensure the water-stopping of the connecting portion of the joint by filling.

  However, the present invention is not limited to this. For example, as shown in FIG. 6A, it is possible to reinforce by providing a rib 15 at a connection portion between the male joint 14 and the flange 11. In FIG. 6A, the connecting portion between the female joint 13 and the flange 11 is also reinforced by providing ribs 16.

  Furthermore, the shape of the male joint is not limited to this embodiment. For example, it is possible to extend the arc as shown by the male joint 14a in FIG. The male joint 14a in FIG. 6B is obtained by extending the inner circumference of the male joint 14 described in FIG. 5 and the like to a range of a circumferential angle of about 229 °. In addition, the diameter of the arc can be changed, and these can be appropriately determined according to the size of the cleaning device such as the jet cleaning rod 30.

  Further, in the present embodiment, the male joint 14 is formed in an arc shape, but if the shape of the male joint 14 has a concave portion on a plane, the space inside the male joint 14 is used for a cleaning device such as the jet cleaning rod 30. Can be used for insertion. Therefore, the shape of the male joint 14 is not limited to an arc shape. For example, as shown in the male joint 14b of FIG. 6C, it can be formed in a U shape. However, since the female joint 13 usually has a shape with a cutout circumference as in the present embodiment, the male joint having an arc shape has the advantage of being easily inserted through the female joint 13.

  Further, the steel continuous wall members 10a and 10b of the present embodiment form a soil mortar by excavating the excavation part as described above, and build the steel continuous wall member therein. It can also be used in conventional construction methods.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

1: Steel connection wall 10a, 10b: Steel connection wall member 13: Female joint 14, 14a, 14b: Male joint 21: Space 22: Water stop material 30: Jet cleaning rod 100: Ground 110: Excavation part 130: Stable Liquid 140: soil mortar

Claims (3)

Filled around the multiple wall members built while inserting the male joint of the other wall member inside the female joint of one wall member and connecting them to the excavated part excavating the ground A step (a) of constructing a filled continuous wall;
(B) filling the space with a water stop material after inserting a cleaning device into the space sandwiched between the male joint and the female joint to clean the space;
With
Wherein the shape of the male joint, have a plan on the recess, and communicates wall construction position in the female fitting of the male joint is characterized in that it is formed as a variable in the connection direction of the connecting wall member Method. Wherein the shape of the male joint, continuous wall building method according to claim 1, characterized in that it is formed in a circular arc shape. In the step (a), the ground is excavated while the excavation part is filled with a stabilizing liquid, and the connecting wall member is built in the excavation part, and then the stable liquid is a soil mortar or fluidized as the filler. Out wall construction method according to claim 1 or claim 2, wherein the replacing processing soil.

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