JP6448425B2 - Wall body manufacturing method - Google Patents

Description

  The present invention relates to a wall manufacturing method, and more particularly to a method (construction method) for manufacturing (forming) a wall body in a place that was an internal space of an open shield machine in an open shield method using an open shield machine.

An open shield method using an open shield machine has been used for some time (see, for example, Patent Document 1).
Patent document 1 is a patent application filed by the present applicant, and “Open shield method is a method in which a towed or self-propelled open shield machine is embedded in the ground, and an underground structure is formed in the internal space of the open shield machine. The underground structure located behind the open shield machine is backfilled while sequentially connecting the objects and excavating the earth and sand forward by the excavator and moving the open shield machine forward. , Mortar, etc. are often used.) By doing this, underground structures can be continuously embedded ”(Patent Document 1, paragraph number 0002 middle stage) Repeatedly connecting underground structures (such as water and sewage pipes, box culverts, U-shaped open channel blocks, etc.) and advancing the open shield machine in space. In it describes forming a ground structure which is continuous to the rear of the open shield machine. In addition to Patent Literature 1, the present applicant has already filed many applications (for example, see Patent Literature 2 to Patent Literature 8) regarding an open shield method, an open shield machine, and the like.

JP 2003-64987 A (for example, abstracts, paragraph numbers 0001 to 0002 in the detailed description of the invention) JP 2004-116179 A JP 2002-61492 A JP 2001-49991 A Japanese Patent Laid-Open No. 11-131979 JP-A-10-299386 JP 10-131673 A Japanese Unexamined Patent Publication No. 7-42488

The open shield method using the open shield machine disclosed in Patent Document 1 has the following problems depending on circumstances. First, (1) underground structures connected in the internal space of the open shield machine are usually carried from the upper part of the open shield machine to the internal space using a large machine such as a crane. Such loading cannot be performed in places where objects (for example, bridges, etc.) exist. For this reason, in locations where such obstacles exist at any position where continuous underground structures should be placed, sloped drilling (originally drilling the part to be drilled with an open shield machine) The underground structure was carried to another position in the soil, and the underground structure was moved to the position (sometimes called a horizontal pulling method). This is the same even in places where large machines such as cranes cannot be used, such as densely populated houses. In such construction involving drilling, there is no earth retaining, so the surrounding ground may loosen and adversely affect surrounding structures (such as abutments). (2) When the open shield machine cannot move to the position where the underground structure should be buried (for example, the start point of the existing underground structure and the end point of the newly installed underground structure (placed by the open shield machine)) When the head of the open shield machine reaches the start point of the existing underground structure, the open shield machine cannot move forward any further, and cannot be connected to the start point.) After removing the shield machine, the steel sheet pile earth retaining method (construction method in which a steel sheet pile is driven around the space in which the underground structure is to be buried to form a retaining wall) (in the previous example, the start point and the end point) Connected). In this case, the work of driving or pulling out the steel sheet pile will cause the surrounding ground to loosen and adversely affect the surrounding structure, or backfill the space inside the open shield machine (excavated), After that, it was necessary to re-dig, requiring laborious work.
Therefore, in the present invention, in the open shield method using an open shield machine, when an underground structure cannot be arranged in the internal space of the open shield machine (for example, (1) the above-described continuous underground structure should be arranged) When there is an obstacle above the location, or when an underground structure cannot be carried into the internal space of an open shield machine, such as when a large machine such as a crane cannot be used, or (2) an underground structure It is an object of the present invention to provide a method capable of arranging underground structures without using excavation or steel sheet pile earth retaining methods when the open shield machine cannot move to the position where the metal is to be buried.

  The present inventors can arrange underground structures without using excavation or steel sheet pile earth retaining methods when underground structures cannot be arranged in the internal space of the open shield machine in the open shield method. As a result of intensive research on the method, the inventors have found that this can be achieved by manufacturing (forming) a wall in a place that was the internal space of the open shield machine, and the present invention has been completed. Such a wall body can function as a retaining wall like a steel sheet pile in the steel sheet pile retaining method. Therefore, the portion to be placed with the underground structure is excavated by an open shield machine, and this wall is a retaining wall. The underground structure can be arranged in the place which was the internal space while preventing the landslide to the place (the part where the underground structure should be arranged) which was the internal space of the open shield machine.

That is, the wall body manufacturing method of the present invention (hereinafter referred to as “the present method”) includes a supporting means for supporting a wall forming member that forms a wall body, and at least a lower surface of an internal space of an open shield machine having an open lower surface. Formed in a support means placement step for placing on a placement surface to be formed, a wall formation step for forming a wall by supporting a wall forming member on the support means placed in the support means placement step, and a wall formation step Moving the open shield machine with respect to the wall in the moving direction, and moving at least a part of the wall formed in the wall forming step from the internal space to the external space. It is a wall body manufacturing method.
The method includes a support means arranging step, a wall forming step, and a moving step.
The open shield machine used in this method has at least the lower surface opened, and an internal space from the left and right (a space sandwiched between the pair of left and right walls) by a pair of left and right walls (which constitute a retaining wall) Work can be performed in the internal space while preventing landslides. Note that left and right refer to “right” and “left”, respectively, in a state in which the open shield machine faces in the traveling direction of the open shield machine.
In the support means arrangement step, the support means is arranged on the arrangement surface. The support means supports the wall forming member that forms the wall body. The arrangement surface forms the lower surface of the internal space of the open shield machine (the lower surface that defines the internal space. Usually, the foundation surface and the soil surface on which the underground structure is disposed). Therefore, at least a part of the support means arranged on the arrangement surface in the support means arrangement step exists in the internal space of the open shield machine.
In the wall body forming step, the wall body is formed by supporting the wall forming member on the support means arranged in the support means arranging step (a part or all of the wall body exists in the internal space of the open shield machine).
In the moving step, the open shield machine is moved in the moving direction with respect to the wall (formed by the wall forming member supported by the support means) formed in the wall forming step. By such movement of the open shield machine, at least a part of the wall body formed in the wall body formation step is positioned from the internal space of the open shield machine to the external space (the wall body does not move absolutely, but the wall body As the open shield machine moves, at least a part of the wall that has existed in the internal space moves relatively from the internal space of the open shield machine to the external space.)

  As a result, at least a part of the wall formed in the internal space of the open shield machine is located in the external space of the open shield machine. By forming a wall that can function as a wall, this wall prevents the landslide to the place that was the internal space of the open shield machine, while working in the place that was the internal space (for example, underground structures) Arrangement). That is, in this method, even in the case where the underground structure cannot be arranged in the internal space of the open shield machine in the open shield method using the open shield machine, the wall formed in the internal space of the open shield machine is In order to prevent landslides in the external space of the open shield machine (the space that was the internal space), it is possible to place underground structures in the external space without using excavation or steel sheet pile retaining methods. it can.

In this method, the supporting means arranging step arranges at least a pair of supporting means at the front and back, and the wall body forming step supports the wall forming member so as to cross the at least one pair of supporting means (hereinafter, “ It may be referred to as “one-pair support method”.
In this way, the pair of support means is arranged at least in the support means arrangement step (referring to “front” and “rear” in the state where the open shield machine is in the traveling direction in the internal space of the open shield machine). At the same time, since the wall forming member is supported so as to cross over the pair of supporting means in the wall forming step, the wall forming member that forms the wall even when earth pressure is applied to the wall functioning as a retaining wall. It can be supported with sufficient strength. (Because one wall forming member is supported by two support means in the front and rear, it can be reliably supported with higher strength than the support by one support means.) .

In the case of this pair-supporting method, the wall forming member is a plate-like wall plate member, the support means has edge locking means for locking the edge of the wall plate member, and the wall body forming step includes: The edge of the wall plate member is locked by the edge locking means of one of the pair of support means, and the edge of the wall plate member is supported by the edge locking means of the other of the pair of support means. (Hereinafter referred to as “wall plate member present method”).
In this way, the wall forming member is constituted by a plate-like wall plate member, and the pair of supporting means has edge locking means for locking the edge of the wall plate member. The edge locking means of one of the supporting means is locked to the edge of the wall plate member, and the edge locking means of the other of the pair of supporting means is supported to the edge of the wall plate member. In addition to supporting the wall plate member at two locations on the edge thereof, the wall body can be effectively constituted by the wall plate member (in addition to being able to support the wall plate member effectively (the main surface of the wall plate member is the wall). The body wall can be formed efficiently.)

In the case of this method, the edge locking means has a groove that is open at least at one end into which the edge of the wall plate member is inserted. In the wall forming step, the edge of the wall plate member May be inserted into the groove from the opened one end.
In this way, the edge of the wall plate member is inserted into the groove (the edge of the wall plate member can be fitted) whose one end (preferably the upper end) forming the edge locking means is opened. By fitting from the one end (opening) of the groove portion, the edge portion of the wall plate member can be easily and quickly locked to the groove portion (edge portion locking means).

In this method, the wall body forming step forms a pair of left and right wall bodies along the front and rear, and the support means includes a right support means for supporting a right wall forming member that forms the right wall body, and a left It has left support means for supporting the left wall forming member that forms the wall body, and left and right connection means for connecting the right support means and the left support means (hereinafter referred to as “the left and right pair wall body main method”). It may be.
By doing so, a pair of left and right wall bodies along the front and rear (that is, a pair of wall bodies along the front and back on the left side and a wall body along the front and rear on the right side) is formed. Work in a place that was an internal space of the machine more safely and efficiently in the place that was the internal space (for example, underground) Arrangement of the structure). As described above, “front and rear” and “left and right” mean “front and rear” and “left and right”, respectively, in a state in which the open shield machine faces in the traveling direction in the internal space of the open shield machine. The support means supports the right support means for supporting the right wall forming member that forms the right wall body (wall body existing on the right side) and the left wall forming member that forms the left wall body (wall body existing on the left side). The left support means and the right and left connection means for connecting the right support means and the left support means. (I.e., a leftward force is applied to the right wall body and a rightward force is applied to the left wall body), the right support means and the left support means are connected by the left and right connection means. Thus, the pair of left and right wall bodies can be arranged in a stable state by canceling the forces in both directions.

In the case of the left-right paired wall body method, the left-right connecting means includes an upper connecting means for connecting the upper part of the right supporting means and the upper part of the left supporting means, and a lower part for connecting the lower part of the right supporting means and the lower part of the left supporting means. The right support means, the left support means, the upper connection means, and the lower connection means may be constituted by rod-like members that are substantially along the four sides of the rectangle.
By doing so, the right support means, the left support means, the upper connection means, and the lower connection means constituted by the rod-like members are connected to each other so as to substantially follow the four sides of the rectangle. When a force in the direction of reducing the distance between the two wall bodies is applied to the wall body, a force in a direction of reducing the distance between the two support means is applied to the right support means and the left support means (that is, the right support means is applied to the right support means). In this case, a leftward force is applied and a rightward force is applied to the left support means), and the right support means and the left support means are securely and firmly connected by the two connection means of the upper connection means and the lower connection means. And a pair of strong left and right wall bodies can be formed.

In this method, the wall body is formed along the moving direction by performing a cycle including a wall body forming step and a moving step performed after the wall body forming step a plurality of times. The moving step moves the open shield machine according to the dimension along the moving direction of the wall forming member supported in the wall forming step immediately before the moving step (hereinafter referred to as “cycle method”). ).
The method includes a supporting means arranging step, a wall body forming step, and a moving step, and a cycle including a wall body forming step and a moving step performed after the wall body forming step is performed a plurality of times. A wall body can be formed along the moving direction. At this time, the moving step included in each cycle moves the open shield machine according to the dimension along the moving direction of the wall forming member supported in the wall forming step immediately before the moving step, so that the wall body Can be formed continuously along the moving direction.

In the cycle method, the moving direction is the forward direction of the open shield machine, and each cycle includes a support means arranging step prior to the wall forming step (hereinafter referred to as “forward direction cycle method”). It may be.
By doing so, a cycle including the supporting means arranging step, the wall forming step performed after the supporting means arranging step, and the moving step performed after the wall forming step is performed in a forward direction of the open shield machine ( Here, the wall body can be formed continuously along the forward direction of the open shield machine.

Forward direction cycle In the case of this method, each of the cycles may include a back-filling step in which the space behind the open shield machine generated by the moving step is back-filled with earth and sand.
By doing so, in the backfilling step in each cycle, the space behind the open shield machine (outside the wall) generated by the moving step is backfilled with earth and sand, so the open shield machine compresses the earth and sand behind. A self-propelled type that moves forward with reaction force can be used well.

In this cycle method, the moving direction is the upward direction of the open shield machine, and after all the support means are arranged by the support means arrangement step, the cycle is performed a plurality of times (hereinafter referred to as “upward cycle book”). It may be referred to as a “method”.
In this way, prior to the cycle, after all the support means are arranged in the internal space of the open shield machine in the support means placement step, a wall body forming step, a moving step performed after the wall body forming step, As the open shield machine is lifted, a wall body can be continuously formed in the upward direction by performing a cycle including a plurality of times.

In the case of the upward direction cycle method, a backfilling step of backfilling the space generated below the open shield machine by the moving step with the earth and sand after the wall forming step may be performed in accordance with the moving step.
By doing so, the back-filling step of backfilling the space created under the open shield machine by the moving step with earth and sand is performed together with the rising (moving step) of the open shield machine. The space generated on the lower side of the machine (outside of the wall) can be smoothly backfilled with earth and sand.

It is a figure which shows the 1st step of the wall manufacturing method (this method) which concerns on 1st Embodiment of this invention. It is a figure which shows the 2nd step of the wall manufacturing method (this method) which concerns on 1st Embodiment. It is a figure which shows a frame. It is a figure which shows the 3rd step of the wall manufacturing method (this method) which concerns on 1st Embodiment. It is a figure which shows the 4th step of the wall manufacturing method (this method) which concerns on 1st Embodiment. It is a figure which shows the 5th step of the wall body manufacturing method (this method) which concerns on 1st Embodiment. It is a figure which shows the 6th step of the wall manufacturing method (this method) which concerns on 1st Embodiment. It is a figure which shows the 7th step of the wall manufacturing method (this method) which concerns on 1st Embodiment. It is a top view which shows the 1st step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is a top view which shows the 2nd step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is a figure which shows the 3rd step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is MM sectional drawing of Fig.11 (a). It is sectional drawing which shows the 4th step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is a figure which shows the 5th step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the 6th step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the 7th step of the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the wall body manufactured by the wall body manufacturing method (this method) which concerns on 2nd Embodiment of this invention. It is a figure which shows another method of inserting the front end and rear end of a sheet pile in a continuous groove.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited by these.

(First embodiment)
FIG. 1 is a view showing a first step of a wall body manufacturing method (present method) according to a first embodiment of the present invention. Specifically, FIG. 1 (a) is a plan view of the first step (a soil surface). 1 (b) is a cross-sectional view taken along line AA of FIG. 1 (a), and FIG. 1 (c) is FIG. 1 (a). It is BB sectional drawing of. The first step will be described with reference to FIG.
FIG. 1 shows that an open shield machine 11 has been used to connect a box culvert 601 to each other in the ground 501 (FIG. 1 shows that the open shield machine 11 is used to 501 shows a place where the box culverts 601 are connected to each other. The operation up to this point can be roughly described as follows. First, a placement hole for placing the open shield machine 11 in the ground 501 is dug by a backhoe or the like (not shown), the open shield machine 11 is lowered into the placement hole, and the open shield machine 11 is placed inside the placement hole. Place. Here, the open shield machine 11 is the same as the open shield machine 11 described in the embodiment of the invention of Japanese Patent No. 3,818,637, which is the patentee of the present applicant (the front frame 1 And a self-propelled type that moves forward by expanding and contracting the distance between the tail frame 2 and the detailed description of the open shield machine 11 is omitted. It should be noted that portions not directly related to the present invention such as a propulsion jack disposed between the front frame 1 and the tail frame 2 and known portions are omitted or simplified for easy illustration and understanding. (The pair of front frames 1 are connected to each other by a connecting beam 3 and the pair of tail frames 2 are connected to each other by a connecting beam 4. Both the front frame 1 and the tail frame 2 are earth retaining. A plate-like member is attached so as to function as a wall.) Such an open shield machine 11 advances the open shield machine 11 while pressing the earth and sand behind the open shield machine 11 by alternately filling back the earth and sand and expanding and contracting the propulsion jack. (In particular, when the propulsion jack is extended after the earth and sand are backfilled behind the open shield machine 11 and the distance between the front frame 1 and the tail frame 2 is extended, the front edge of the earth and sand is directed rearward. The front frame 1 is moved forward by the forward reaction force generated by the compression and then the tail frame 2 is moved forward when the propulsion jack is retracted (there is a space behind the tail frame 2). When the earth and sand are backfilled in the space behind the open shield machine 11 and the propulsion jack is extended again, the earth and sand The front frame 1 is pushed forward and pushed forward and the front frame 1 moves forward again by the forward reaction force generated by the pushing, and the propulsion jack is extended in this way (rearward compaction of sand and sand and the front frame 1 moves forward). Open shield machine while pressing the sand and sand behind the open shield machine 11 by repeating the steps of shrinking the propulsion jack (the tail frame 2 moves forward and creating a space behind) and backfilling the sand and sand in the back space 11, the front is indicated by an arrow Z1 (the advance direction of the open shield machine 11), the rear is indicated by an arrow Z2, the upper is indicated by an arrow Z3, and the lower is indicated by an arrow Z4. Respectively.) But the open shield machine used for this construction method is not limited to this.

And each time such an open shield machine 11 advances, it includes the internal space 13 (the space between the left and right front frames 1 and the space between the left and right tail frames 2). )) Is leveled (floor level), and then a base portion 521 (see FIG. 1C) is formed. Specifically, the foundation portion 521 includes a crushed stone laid on the floor surface (floored) positioned in the internal space 13, and a precast concrete plate laid so as to be embedded in the upper surface of the crushed stone. , Is formed. The precast concrete board is laid at a position where the box culvert 601 is placed on the upper surface.
After such a base portion 521 is formed, the box culvert 601 is put into the internal space 13 from above (for example, suspended by a crane (not shown) and inserted into the internal space 13). The rear end of the box culvert 601 is connected to the front end of the box culvert 601 nearest to the rear (the inserted box culvert 601 is placed on the base portion 521).
As described above, the connecting step of connecting one unit of box culvert 601 to the existing box culvert 601 in the internal space 13 of the open shield machine 11, and the length of the unit of box culvert 601 connected in the connecting step. In accordance with the advance step of moving the open shield machine 11 forward, and the backfilling step of refilling the box culvert 601 positioned behind the open shield machine 11 advanced in the advance step (a space formed behind the open shield machine 11) The box culvert 601 connected to the underground 501 can be arranged.
FIG. 1 shows a state in which the open shield machine 11 that has advanced while connecting a plurality of box culverts 601 is approaching under the bridge 701 by such a process.

FIG. 2 is a diagram showing a second step of the wall manufacturing method (this method) according to the first embodiment. Specifically, FIG. 2A is a cross-sectional view taken along the line CC in FIG. 1C (understanding). In order to facilitate illustration, a plane excluding the bridge 701 is shown, and a dotted line D in Fig. 2A indicates the position of the rear end 701b of the bridge 701 (the same applies hereinafter). It is a figure which shows the state which the 2nd step was completed, FIG.2 (b) is a figure which shows the state which the 2nd step of the BB cross-section position of Fig.1 (a) completed (B- of Fig.2 (a)) B section position is shown). FIG. 3 is a diagram showing the frame body 21 used in the second step (specifically, FIG. 3A is an enlarged view of the frame body 21 indicated by an arrow E in FIG. 2A). 3 (b) shows the frame body 21 as viewed from the direction of arrow F in FIG. 3 (a), and FIG. 3 (c) is a cross-sectional view taken along the line GG in FIG. 3 (b). ). The second step will be described with reference to FIGS.
In the second step, a pair of frame bodies 21 are arranged in the internal space 13 of the open shield machine 11. One and the other of the pair of frame bodies 21 are the same (all the structure, shape and dimensions are the same). The frame 21 includes a pair of straight vertical members 23a, 23b that are substantially parallel to each other, a straight upper horizontal member 25a that connects the upper ends of the pair of vertical members 23a, 23b, and the lower ends of the pair of vertical members 23a, 23b. A straight lower horizontal member 25b to be connected, and the vertical members 23a, 23b, the upper horizontal member 25a, and the lower horizontal member 25b are arranged along substantially four sides of the rectangle. The members 23a, 23b, the upper horizontal member 25a, and the lower horizontal member 25b are all formed of the same H-shaped steel (the vertical members 23a, 23b, the upper horizontal member 25a, and the lower horizontal member 25b are fixed by welding. ing.). The front and rear surfaces of the vertical members 23a and 23b are formed with continuous grooves 24a and 24b that are continuous in the vertical direction and have upper and lower ends opened. Such a pair of frames 21 are arranged such that orthographic projections on a virtual plane perpendicular to the front-rear direction (for example, plane P in FIG. 2A) overlap each other. The frame body 21 arranged in the internal space 13 of the open shield machine 11 is appropriately supported so that the position is maintained.

FIG. 4 is a diagram showing a third step of the wall body manufacturing method (this method) according to the first embodiment, and in detail, FIG. 4 (a) shows FIG. 2 (FIG. 2 (a) after completion of the third step. FIG. 4A is a diagram showing the same part as (a) (dotted line D is the position of the rear end 701b of the bridge 701), and FIG. 4B is an enlarged view of the part indicated by the arrow J in FIG. (C) is KK sectional drawing of FIG.4 (b), FIG.4 (d) is LL sectional drawing of FIG.4 (b). The third step will be described with reference to FIG.
In the third step, a pair of sheet piles 31 are hung on the pair of frames 21 formed in the second step. Specifically, the front end of the sheet pile 31 is inserted into the continuous groove 24 a of the front frame body 21 of the pair of frame bodies 21, and the rear end of the sheet pile 31 is inserted into the continuous groove 24 a of the rear frame body 21. In order to fit the front end and the rear end of the sheet pile 31 into the continuous groove 24a, it is usually sufficient to fit the front end and the rear end from the upper end of the continuous groove 24a, but when this is difficult, FIG. 18 (FIG. 4B) As shown in the figure, a pair of vertical members 23a, 23a are shown (other parts are not shown), and one of the pair of continuous grooves 24a into which both ends of the sheet pile 31 should be fitted (see FIG. 18, after inserting one end (rear end in FIG. 18) of the sheet pile 31 into the rear continuous groove 24 a), the sheet pile 31 is bent to connect the other end (front end in FIG. 18) of the pair of continuous grooves 24 a. One of them (in FIG. 18, the front continuous groove 24a) may be fitted (arrow W). Similarly, the front end of the sheet pile 31 is inserted into the continuous groove 24 b of the front frame body 21 of the pair of frame bodies 21, and the rear end of the sheet pile 31 is inserted into the continuous groove 24 b of the rear frame body 21. In order to fit the front end and the rear end of these sheet piles 31 into the continuous groove 24b, it is usually sufficient to fit the front end and the rear end from the upper end of the continuous groove 24b, but when that is difficult, as shown in FIG. After inserting one end of the sheet pile 31 into one of the pair of continuous grooves 24b to which both ends of the sheet pile 31 should be inserted, the sheet pile 31 is bent and the other end of the sheet pile 31 is inserted into the other of the pair of continuous grooves 24b. You may do it. In this way, as shown in FIG. 4, the pair of left and right sheet piles 31 are hung between the pair of frame bodies 21.

FIG. 5 is a diagram showing a fourth step of the wall manufacturing method (this method) according to the first embodiment, and in detail, FIG. 5A is the same as FIG. 4B in the third step. FIG. 5B is a diagram showing the parts (the parts other than the part indicated by the arrow J in FIG. 4A are the same as those in FIG. 4A), and FIG. 5B is KK in FIG. 5A. FIG. 5C is a cross-sectional view (cross section similar to FIG. 4C), and FIG. 5C is an LL cross-sectional view of FIG. 5A (cross section similar to FIG. 4D). The fourth step will be described with reference to FIG.
In the fourth step, a plurality (four in this case) of the sheet piles 31 are hung between the pair of frame bodies 21 above the lowermost sheet pile 31 hung between the pair of frame bodies 21 in the third step. (These sheet piles 31 may be applied in the same manner as the bottom sheet pile 31). Thus, when the fourth step is completed, a pair of left and right sheet piles 31 are hung between the pair of frame bodies 21.

FIG. 6 is a view showing a fifth step of the wall body manufacturing method (this method) according to the first embodiment. Specifically, FIG. 6 is a view showing the same part as FIG. , The rear end 701b position of the bridge 701). The fifth step will be described with reference to FIG.
In the fifth step, the open shield machine 11 moves forward (moves in the arrow Z1 direction) by a predetermined distance (substantially equal to the distance between the pair of frames 21). Specifically, by extending a propulsion jack (not shown) of the open shield machine 11 and extending the distance between the front frame 1 and the tail frame 2, the front end of the earth and sand existing behind the open shield machine 11 is moved backward. The front frame 1 is moved forward by the forward reaction force generated by the compression, and then the tail frame 2 is moved forward by retracting the propulsion jack, so that the open shield machine 11 can be moved forward. . After the advance of the open shield machine 11, the earth and sand 801 are backfilled in the space behind the open shield machine 11 generated by the advance, and the state shown in FIG. 6 is obtained (FIG. 6 shows the completion of the fifth step).

FIG. 7 is a view showing a sixth step of the wall body manufacturing method (this method) according to the first embodiment. Specifically, FIG. 7 is a view showing the same portion as FIG. 6 (dotted line D is a bridge 701). Rear end 701b position). The sixth step will be described with reference to FIG.
In the sixth step, a frame body 21 (pointed by an arrow E in FIG. 7; hereinafter referred to as a new frame body 21 in this paragraph) is installed in the internal space 13 of the open shield machine 11. Since the new frame 21 is the same as the pair of frames 21 installed in the second step, detailed description thereof is omitted here. All the frame bodies 21 including the new frame body 21 are arranged so that the orthographic projections on a virtual plane perpendicular to the front-rear direction (for example, the plane P in FIG. 7) overlap each other.

FIG. 8 is a view showing a seventh step of the wall body manufacturing method (this method) according to the first embodiment, and in detail, FIG. 8 (a) is the same as FIG. 7 after the seventh step is completed. The figure which shows the same part (dotted line D is the rear end 701b position of the bridge 701), FIG.8 (b) is AA sectional drawing of Fig.8 (a), FIG.8 (c) is FIG. It is BB sectional drawing of a). The seventh step will be described with reference to FIG.
In the seventh step, the frame body 21 (the new frame body described in the previous paragraph) formed in the sixth step and the rear side (arrow Z2 direction) nearest to the frame body 21 (the new frame body described in the previous paragraph) A sheet pile 31 (specifically, 5 sheets × left and right pair = 10 sheets) is hung between the frame body 21 and the frame body 21. Specifically, after the pair of sheet piles 31 is hung over the pair of frame bodies 21 in the third step described above, the bottom sheet pile 31 hung between the pair of frame bodies 21 in the fourth step is placed above. Further, it may be performed in the same manner as when a plurality of (here, four) sheet piles 31 are multiplied.
In this way, as shown in FIG. 8, a wall including five sheet piles 31 on the left and right sides is formed between adjacent frame bodies 21 (in FIG. 8, three frame bodies 21 are disposed. In addition, a pair of left and right walls are formed in series in the front-rear direction between the two frames 21).
Thereafter, the cycle of the fifth step (open shield machine 11 advance and earth and sand 801 backfill), sixth step (installation of frame body 21 in internal space 13) and seventh step (installation of sheet pile 31 between frame bodies 21) By repeating the above, it is possible to form a pair of left and right walls formed by the sheet piles 31 between the adjacent frame bodies 21 toward the front (arrow Z1 direction) to a desired length. Since the left and right walls function as a retaining wall, it is possible to prevent earth and sand from entering the space 35 between the left and right walls from the left and right, and to perform work freely between the left and right walls.

  As described above, the wall body manufacturing method (this method) according to the first embodiment includes at least support means (here, the frame body 21) that supports the wall forming member (here, the sheet pile 31) that forms the wall body. The support means arrangement step (here, the arrangement means for arranging on the arrangement surface forming the lower surface of the inner space 13 of the open shield machine 11 with the lower surface opened (the floor surface leveled (leveled) in the inner space 13)) The wall forming member (sheet pile 31) is supported by the supporting means (frame body 21) arranged by the second step, the sixth step) and the supporting means arranging step (second step, sixth step) to form a wall body. An open sheet is formed on the wall formed in the wall forming step (here, the third step, the fourth step, and the seventh step) and the wall forming step (the third step, the fourth step, and the seventh step). Of the wall body formed in the wall body formation step (the third step, the fourth step, and the seventh step) A moving step for moving at least a portion from the internal space 13 to the external space (here, the forward movement of the open shield machine 11 in the fifth step (moving in the direction of arrow Z1)) and the forward movement of the open shield machine 11 performed after the seventh step And a wall body manufacturing method.

In the wall body manufacturing method (this method) according to the first embodiment, the support means arranging step (second step, sixth step) arranges at least a pair of support means (frame body 21) in the front and rear, and the wall body. The forming step (the third step, the fourth step, and the seventh step) supports the wall forming member (the sheet pile 31) over the at least one pair of support means (frame body 21).
In the wall body manufacturing method (this method) according to the first embodiment, the wall forming member is a plate-like wall plate member (sheet pile 31), and the support means (frame body 21) is the wall plate member (sheet pile 31). It has edge part locking means (here, continuous grooves 24a, 24b) for locking the edge part, and the wall body forming step (third step, fourth step, seventh step) is the pair of support means. A pair of supports is made such that the edge portion (front edge portion) of the wall plate member (sheet pile 31) is locked to the edge portion locking means (continuous grooves 24a, 24b) of one (for example, the front side) of the (frame body 21). The edge (rear edge) of the wall plate member (sheet pile 31) is supported by the edge locking means (continuous grooves 24a, 24b) of the other (for example, rear) of the means (frame body 21).
In the wall body manufacturing method (this method) according to the first embodiment, the edge locking means (continuous grooves 24a, 24b) are at least one end (here, the edge of the wall plate member (sheet pile 31) is inserted) In the wall body forming step (third step, fourth step, and seventh step), the edge of the wall plate member (sheet pile 31) is opened at one end (here). Then, it is inserted into the groove (continuous grooves 24a, 24b) from the upper end.

In the wall body manufacturing method (this method) according to the first embodiment, the wall body forming steps (third step, fourth step, and seventh step) form a pair of left and right wall bodies along the front and rear. Yes, the support means (the frame body 21) supports the right support means (here, the vertical member 23a) that supports the right wall forming member that forms the right wall body, and the left that supports the left wall forming member that forms the left wall body. Left and right connecting means (here, upper horizontal member 25a and lower horizontal member 25b) for connecting the supporting means (here vertical member 23b), the right supporting means (vertical member 23a) and the left supporting means (vertical member 23b); It is what has.
In the wall body manufacturing method (this method) according to the first embodiment, the left and right connecting means (upper horizontal member 25a and lower horizontal member 25b) are connected to the upper part of the right support means (vertical member 23a) and the left support means (vertical member). 23b) and upper connecting means (upper horizontal member 25a) for connecting the lower part of the right supporting means (vertical member 23a) and lower part of the left supporting means (vertical member 23b) (lower horizontal) The right support means (vertical member 23a), the left support means (vertical member 23b), the upper connecting means (upper horizontal member 25a) and the lower connecting means (lower horizontal member 25b) are rectangular. These are constituted by rod-like members (here, straight H-section steel) substantially along the four sides.

In the wall body manufacturing method (this method) according to the first embodiment, a wall body forming step (third step and fourth step, seventh step), and the wall body forming step (third step and fourth step), A cycle (first step) including a moving step (forward movement of the open shield machine 11 in the fifth step (moving in the direction of the arrow Z1) in the fifth step) and a forward movement of the open shield machine 11 performed after the seventh step (the seventh step). One cycle is composed of four steps of 2 steps, 3rd step, 4th step, 5th step (including advance of open shield machine 11 and backfilling of earth and sand 801), and 6th step 1 cycle is constituted by the forward movement of the open shield machine 11 performed after the seventh step and the seventh step and the backfilling of the earth and sand 801 thereafter). The wall body is formed along the movement direction (here, the forward direction of the open shield machine 11 (arrow Z1 direction)), and the movement step (of the open shield machine 11 in the fifth step). The forward movement (moving in the direction of the arrow Z1) and the open shield machine 11 advanced after the seventh step) are the wall forming step immediately before the moving step (the moving step is the advance of the open shield machine 11 in the fifth step). If there is a third step and a fourth step, and the moving step is an advance of the open shield machine 11 performed after the seventh step, it is the seventh step.) The wall forming member (the sheet pile 31) supported by the wall forming member (the sheet pile 31) is supported. The open shield machine 11 is moved according to the dimension along the moving direction (the forward direction of the open shield machine 11 (arrow Z1 direction)). Is intended to substantially the same) it is.
In the wall body manufacturing method (this method) according to the first embodiment, the moving direction is the forward direction (arrow Z1 direction) of the open shield machine 11, and each cycle includes a wall body forming step (third step and Prior to the fourth step and the seventh step, a support means arranging step (second step and sixth step) is included.
In the wall body manufacturing method (this method) according to the first embodiment, each cycle is performed after the moving step (forward movement of the open shield machine 11 in the fifth step (moving in the arrow Z1 direction)) and the seventh step. The back-filling step of backfilling the space behind the open shield machine 11 generated by the open shield machine 11 with the earth and sand 801 (here, the backfill of the earth and sand 801 in the fifth step and the open shield performed after the seventh step) Including backfilling of the earth and sand 801 after the machine 11 advances).

(Second Embodiment)
FIG. 9 is a plan view showing a first step of the wall body manufacturing method (present method) according to the second embodiment of the present invention (showing a vertical view with respect to the soil surface 505). The first step will be described with reference to FIG.
Here, the open shield machine 11 is shown moving forward (in the direction of the arrow Z1) and the box culverts 601 connected to each other while being disposed in the soil. A U-shaped block 651 is already embedded in front of the open shield machine 11 (in the direction of the arrow Z1). The open shield machine 11 includes a U-block 651 rear end, a connected box culvert 601 front end, Since it is necessary to perform an operation for connecting the rear end of the U-shaped block 651 and the front end of the box culvert 601, a wall body as a retaining wall is formed as described later. is there. Here, similarly to the first embodiment, the open shield machine 11 is the same as the open shield machine 11 described in the embodiment of the invention of Japanese Patent No. 3818637, whose applicant is the patentee. (Similar to the first embodiment, however, in the following drawings, portions not directly related to the present invention such as a propulsion jack disposed between the front frame 1 and the tail frame 2 and known portions are illustrated. In order to facilitate understanding, the illustration is omitted or simplified.) However, the present invention is not limited to this.

FIG. 10 is a plan view (showing the same position as FIG. 9) showing the second step of the wall manufacturing method (this method) according to the second embodiment of the present invention. The second step will be described with reference to FIG.
In the second step, a plurality (here, specifically 6) of frames 21 are arranged in the internal space 13 of the open shield machine 11. Since the multiple (6) frame bodies 21 arranged here are the same as the frame body 21 used in the first embodiment, detailed description thereof will be omitted here (of course, the arrangement of 6 frames arranged here). The frame bodies 21 are also the same.) Such a plurality (6) of frame bodies 21 are arranged such that orthographic projections onto a virtual plane (for example, plane P in FIG. 10) perpendicular to the front-rear direction overlap each other.

FIG. 11 is a diagram showing a third step of the wall body manufacturing method (this method) according to the second embodiment of the present invention. Specifically, FIG. 11 (a) is a plan view showing the same position as FIG. FIG. 11B is an NN cross-sectional view of FIG. 12 is a cross-sectional view taken along the line MM in FIG. 11A (however, the illustration of the cross-sectional view taken along the line OO in FIG. 11B is omitted for easy understanding and illustration.) 13 and FIG. 14 (a), FIG. 15, FIG. 16, and FIG. The third step will be described with reference to FIGS. 11 and 12. In addition, the same elements as those described in the first embodiment are denoted by the same reference numerals as those in the first embodiment (the description of the similar elements is omitted).
In a 3rd step, a pair of sheet piles 31 are hung between the mutually adjacent frame bodies 21 among the some frame bodies 21 arrange | positioned at the 2nd step. In addition, what is necessary is just to perform about the operation | work which hangs the sheet pile 31 between the adjacent frame bodies 21 similarly to the 3rd step in 1st Embodiment. 11 and 12 show a state in which the pair of left and right sheet piles 31 are hung between the frame bodies 21 adjacent to each other among the plurality of frame bodies 21 in this way.

FIG. 13 is a cross-sectional view (showing the same cross section as FIG. 12) showing the fourth step of the wall manufacturing method (the present method) according to the second embodiment of the present invention. The fourth step will be described with reference to FIG.
In the fourth step, the open shield machine 11 is raised (in the direction of arrow Z3), and the space below the frame (front frame 1, tail frame 2) formed with the rise of the open shield machine 11 is backfilled with earth and sand 811. (The input direction of earth and sand 811 is indicated by an arrow Q). The rising amount of the open shield machine 11 in the fourth step is made substantially the same as the vertical height of the sheet pile 31 hung between the frames 21 in the third step. The open shield machine 11 is provided with the “self-elevating device 11” described in Japanese Patent No. 3096974, and can be freely raised.

FIG. 14 is a view showing a fifth step of the wall body manufacturing method (present method) according to the second embodiment of the present invention. Specifically, FIG. 14 (a) is a cross section showing the same cross-sectional position as FIG. FIG. 14 (b) is a cross-sectional view showing the same cross-sectional position as FIG. 11 (b). The fifth step will be described with reference to FIG.
In the fifth step, the sheet pile 31 is further hung between the pair of frame bodies 21 on the bottom sheet pile 31 whose outer side is backfilled with earth and sand 811 in the fourth step. What is necessary is just to perform the operation | work which hangs the sheet pile 31 on this lowermost sheet pile 31 similarly to the 4th step in 1st Embodiment. FIG. 14 shows a state in which a pair of sheet piles 31 are further hung on the bottom sheet pile 31 in this way.

FIG. 15 is a cross-sectional view (showing the same cross section as FIG. 14A) showing the sixth step of the wall manufacturing method (the present method) according to the second embodiment of the present invention. The sixth step will be described with reference to FIG.
In the sixth step, the open shield machine 11 is raised, and the space below the frame (front frame 1, tail frame 2) formed with the rise of the open shield machine 11 is backfilled with earth and sand 811 (the earth and sand 811 is charged) The direction is indicated by arrow Q). In addition, the raising amount of the open shield machine 11 in the sixth step is made substantially the same as the vertical height of the sheet pile 31 hung between the frames 21 in the fifth step.

FIG. 16 is a cross-sectional view (showing the same cross section as FIG. 15) showing the seventh step of the wall manufacturing method (the present method) according to the second embodiment of the present invention. The seventh step will be described with reference to FIG.
In the seventh step, the sheet pile 31 is further hung between the pair of frame bodies 21 on the second-stage sheet pile 31 from the bottom where the outside is backfilled with earth and sand 811 in the sixth step. About the operation | work which hangs the sheet pile 31 further between the frame bodies 21 on the sheet metal 31 of the 2nd step | paragraph from the bottom, it may carry out similarly to the above-mentioned 5th step. FIG. 16 shows a state in which a pair of sheet piles 31 are further hung on the sheet pile 31 in the second stage from the bottom.

  Hereinafter, the sixth step (backfilling with the earth and sand 811 while raising the open shield machine 11) and the seventh step (the sheet pile 31 is hung between the pair of frame bodies 21) are alternately performed. 17 (showing the same cross section as FIG. 16), a wall including five sheet piles 31 is formed between the adjacent frame bodies 21 (here, six frame bodies 21 are disposed). A pair of left and right walls (a total of 5 sheets x left and right pair x 5 = 50 sheet piles 31 are used) are formed between the five frames 21. Since the left and right walls function as a retaining wall, the earth and sand can be prevented from entering the space 35 between the left and right walls. Then, the open shield machine 11 is raised to the soil surface 505, and thereafter, the open shield machine 11 is removed, and the work can be freely performed in the space 35 between the pair of left and right walls (for example, as described above, U-shaped Operation for connecting the rear end of the block 651 and the front end of the box culvert 601 can be performed.

  As described above, the wall body manufacturing method (this method) according to the second embodiment of the present invention is the support means (here, the frame body 21) that supports the wall forming member (here, the sheet pile 31) that forms the wall body. Support means disposing step for disposing at least a disposition surface forming a lower surface of the internal space 13 of the open shield machine 11 whose lower surface is open (a ground surface leveled (leveled) in the internal space 13) (In this case, the second step) and a wall forming step for forming a wall by supporting the wall forming member (sheet pile 31) on the supporting means (frame body 21) arranged in the supporting means arranging step (second step) ( Here, the third step, the fifth step, the seventh step, a step in which the subsequent sheet pile 31 is hung between the pair of frames 21, and the wall forming step (the third step, the fifth step, the seventh step, and so on) Arrows The open shield machine 11 is moved in the movement direction (here, upward direction, arrow Z3 direction) with respect to the wall body formed by the step 31 between the pair of frame bodies 21, and the wall body formation step ( The third step, the fifth step, the seventh step, and the subsequent step in which the sheet pile 31 is hung between the pair of frame bodies 21) at least a part of the wall body is positioned from the inner space 13 to the outer space. A moving body manufacturing method (here, the open shield machine 11 rises in the fourth step, the open shield machine 11 rises in the sixth step, and the subsequent open shield machine 11 rises).

In the wall body manufacturing method (this method) according to the second embodiment of the present invention, the support means arranging step (second step) includes at least a pair (here, six) of support means (frame body 21) on the front and rear. And a wall body forming step (third step, fifth step, seventh step, and subsequent step of hanging the sheet pile 31 between the pair of frame bodies 21) includes at least a pair (six) of supporting means (frames). The body 21) is supported so that the wall forming member (sheet pile 31) is applied.
In the wall body manufacturing method (this method) according to the second embodiment of the present invention, the wall forming member is a plate-like wall plate member (sheet pile 31), and the support means (frame body 21) is the wall plate member (sheet pile). 31) edge locking means (here, continuous grooves 24a, 24b) for locking the edge of the wall body forming step (third step, fifth step, seventh step, and subsequent sheet piles 31). Is a wall plate member (sheet pile) on the edge locking means (continuous grooves 24a, 24b) of one (for example, the front) of the pair of support means (frame body 21). 31) The wall plate member is engaged with the edge locking means (continuous grooves 24a, 24b) of the other (for example, the rear) of the pair of support means (frame body 21) while locking the edge (front edge) of 31). The edge part (rear edge part) of the (sheet pile 31) is supported.
In the wall body manufacturing method (this method) according to the second embodiment of the present invention, the edge locking means (continuous grooves 24a, 24b) is at least one end into which the edge of the wall plate member (sheet pile 31) is fitted. In the step of forming a wall body (the third step, the fifth step, the seventh step, and the subsequent sheet pile 31 being hung between the pair of frame bodies 21) The edge of the wall plate member (sheet pile 31) is fitted into the groove (continuous grooves 24a, 24b) from the opened one end (here, the upper end).

In the wall body manufacturing method (this method) according to the second embodiment of the present invention, a wall body forming step (third step, fifth step, seventh step, and subsequent sheet piles 31 is hung between a pair of frame bodies 21. The step of passing) forms a pair of left and right wall bodies along the front and back, and the support means (frame body 21) is a right support means (here, vertical) that supports the right wall forming member that forms the right wall body. The member 23a), the left support means (in this case, the vertical member 23b) for supporting the left wall forming member forming the left wall body, the right support means (the vertical member 23a), and the left support means (the vertical member 23b) are connected. Left and right connecting means (in this case, the upper horizontal member 25a and the lower horizontal member 25b).
In the wall body manufacturing method (this method) according to the second embodiment of the present invention, the left and right connecting means (upper horizontal member 25a and lower horizontal member 25b) are the upper part of the right support means (vertical member 23a) and the left support means. Upper connection means (upper horizontal member 25a) for connecting the upper part of (vertical member 23b), lower connection means for connecting the lower part of the right support means (vertical member 23a) and the lower part of the left support means (vertical member 23b). (Lower horizontal member 25b), right support means (vertical member 23a), left support means (vertical member 23b), upper connection means (upper horizontal member 25a) and lower connection means (lower horizontal member 25b). However, it is comprised by the rod-shaped member (here straight H-section steel) substantially along the four sides of the rectangle.

In the wall body manufacturing method (this method) according to the second embodiment of the present invention, a wall body forming step (third step, fifth step, seventh step, and subsequent sheet piles 31 is hung between a pair of frame bodies 21. A moving step (in the fourth step), and a wall forming step (third step, fifth step, seventh step, step in which the subsequent sheet piles 31 are hung between the pair of frame bodies 21). Open shield machine 11 rises, open shield machine 11 rises in the sixth step, and subsequent open shield machine 11 rises) (the third step and the fourth step form one cycle, and the fifth step One cycle is formed by the sixth step, and one cycle is formed by the seventh step and the rise of the open shield machine 11 after the seventh step. The wall body is formed along the moving direction (upward direction), and the moving step (the rising of the open shield machine 11 in the fourth step, the sixth step) The open shield machine 11 is raised, and the subsequent open shield machine 11 is raised. The wall forming step (third step, fifth step, seventh step) immediately before the moving step is made between the pair of frame bodies 21 between the pair of frame bodies 21. The open shield machine 11 is moved (substantially the same as the dimensions) in accordance with the dimension along the moving direction (upward direction) of the wall forming member (sheet pile 31) supported by
In the wall body manufacturing method (this method) according to the second embodiment of the present invention, the moving direction is the upward direction of the open shield machine 11, and all (six) pieces are formed by the support means arranging step (second step). After the support means (frame body 21) is arranged, a plurality of the cycles (the third step and the fourth step, the fifth step and the sixth step, the open shield machine 11 rising after the seventh step and the seventh step) are plural. Performed once.
In the wall body manufacturing method (this method) according to the second embodiment of the present invention, a wall body forming step (third step, fifth step, seventh step, and subsequent sheet piles 31 is hung between a pair of frame bodies 21. After the passing step), the space created below the open shield machine 11 by the moving step (the open shield machine 11 rises in the fourth step, the open shield machine 11 rises in the sixth step, and the subsequent open shield machine 11 rises) 811 Backfilling step (backfilling with earth and sand 811 in the fourth step, backfilling with earth and sand 811 in the sixth step, and backfilling with earth and sand 811 performed in conjunction with the subsequent rise of the open shield machine) Open shield machine 11 rises in step, open case in sixth step Field machine 11 rises, is performed in accordance with the open shield machine 11 increase) and later.

DESCRIPTION OF SYMBOLS 1 Front frame 2 Tail frame 3 Connection beam 4 Connection beam 11 Open shield machine 13 Internal space 21 Frame body 23a, 23b Vertical member 24a, 24b Continuous groove 25a Upper horizontal member 25b Lower horizontal member 31 Sheet pile 35 Space 501 Underground 505 Earth surface 521 Foundation part 601 Box culvert 651 U-shaped block 701 Bridge 701b Rear end 801 Earth and sand 811 Earth and sand

Claims (9)

A support means arrangement step of arranging a support means for supporting the wall forming member forming the wall body on an arrangement surface forming the lower surface of the internal space of the open shield machine having at least the lower surface opened; and
A wall forming step of forming a wall by supporting a wall forming member on the supporting means arranged by the supporting means arranging step;
The open shield machine is moved in the moving direction with respect to the wall formed in the wall forming step, and at least a part of the wall formed in the wall forming step is positioned from the internal space to the external space. A wall manufacturing method comprising a moving step,
The wall body forming step forms a pair of left and right wall bodies along the front and rear,
The support means connects the right support means for supporting the right wall forming member forming the right wall body, the left support means for supporting the left wall forming member forming the left wall body, and the right support means and the left support means. Left and right connecting means
The left and right connecting means comprises an upper connecting means for connecting the upper part of the right supporting means and the upper part of the left supporting means, and a lower connecting means for connecting the lower part of the right supporting means and the lower part of the left supporting means,
The wall manufacturing method, wherein the right support means, the left support means, the upper connection means, and the lower connection means are each constituted by a bar-like member substantially along the four sides of the rectangle. The supporting means arranging step arranges at least a pair of supporting means at the front and rear,
The wall body manufacturing method according to claim 1, wherein the wall body forming step supports the at least one pair of support means so as to hang the wall forming member. The wall forming member is a plate-like wall plate member,
The support means has edge locking means for locking the edge of the wall plate member,
In the wall forming step, the edge locking means of one of the pair of support means locks the edge of the wall plate member, and the edge locking means of the other of the pair of support means includes the wall board. The wall manufacturing method according to claim 2, wherein the edge of the member is supported. The edge locking means has a groove that is open at least one end into which the edge of the wall plate member is fitted,
The wall body manufacturing method according to claim 3, wherein, in the wall body forming step, the edge portion of the wall plate member is fitted into the groove portion from the opened one end. A wall is formed along the moving direction by performing a cycle including a wall forming step and a moving step performed after the wall forming step a plurality of times.
The moving step moves the open shield machine according to the dimension along the moving direction of the wall forming member supported in the wall forming step immediately before the moving step. 2. The method for producing a wall body according to 1. The moving direction is the forward direction of the open shield machine,
The wall body manufacturing method according to claim 5, wherein each of the cycles includes a support means arranging step prior to the wall body forming step.   The wall manufacturing method according to claim 6, wherein each of the cycles includes a back-filling step of back-filling the space behind the open shield machine generated by the moving step with earth and sand. The moving direction is the upward direction of the open shield machine,
The wall body manufacturing method according to claim 5, wherein the cycle is performed a plurality of times after all the support means are arranged in the support means arranging step.   The wall manufacturing method according to claim 8, wherein after the wall forming step, a backfilling step of backfilling a space generated below the open shield machine by the moving step with earth and sand is performed in accordance with the moving step.

Images