Lifting-type segment assembly device

Abstract

To solve the problems of the prior art, that is, to provide a lifting-type segment assembly device which is lighter than the prior art and can reduce the machine height when fully retracted.SOLUTION: A lifting-type segment assembly device of the present invention is a device for lifting and lowering segments for shield tunnels, and comprises a support column, an upper base body, a support body, a lower jack, an upper jack, and a rotating jack. When the lower jack lifts a middle column, an upper column and the upper base body rise together with the middle column, thereby lifting the segments attached to a gripping body, and when the upper jack lifts the upper column, the upper base body rises together with the upper column, thereby lifting the segments attached to the gripping body.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to technology related to the assembly and removal of segments in shield tunneling, and more specifically to a lifting-type segment assembly device that can raise and lower segments using two jacks, one above the other. [Background technology]

[0002] The shield tunneling method is a construction method for constructing underground railway tunnels, road tunnels, water and sewerage tunnels, utility conduits, power and communication tunnels, etc. by digging underground with a shield machine while stabilizing the tunnel face and lining it with segments. As it is a no-cut construction method that can limit the impact on the aboveground environment, the shield tunneling method has tended to be used more frequently in recent years, and is currently being used to construct tunnels with larger cross sections, greater depths, and longer distances.

[0003] In shield tunnels, underground widening work is sometimes carried out. For example, in sections where road and rail tunnels branch off and join, emergency parking areas in road tunnels, and railway tunnel station areas, the cross-section is larger than that of the main line shield tunnel section, so underground widening work is carried out after the tunnel is first constructed with the same cross-section as the main line shield tunnel. Alternatively, when constructing a large-section tunnel, there is a technique in which two parallel shield tunnels are constructed and then underground widening work is carried out on each to complete a single large-section tunnel. Of course, underground widening work is also carried out when it is necessary to expand the cross-section of an existing shield tunnel. Furthermore, in the widening sections of shield tunnels, segments with special shapes, such as curved shapes that form part of an ellipse (hereinafter referred to as "special segments SGs"), are sometimes used instead of segments with a typical shape (i.e., an arc shape that is close to a perfect circle).

[0004] In addition, shield tunnels with non-circular cross-sectional shapes, such as egg-shaped, elliptical, or shapes combining multiple arcs, are sometimes planned, and even shield tunnels with a cross-sectional shape that gradually changes along the tunnel axis are sometimes planned. In these shield tunnels, special segments (SGs) are also used.

[0005] Figure 16 is a cross-sectional view that shows a schematic diagram of underground widening work being carried out on a shield tunnel, with new special segments SGs installed in the widened section. The procedure for carrying out widening work as shown in this figure is roughly as follows: First, the existing segments (those located at the dashed line in the figure) are removed, and construction machinery such as a backhoe is used to excavate the ground to form the widened section. Next, the special segments SGs are installed to cover the ground in the widened section, and backfilling is carried out.

[0006] In recent years, shield tunnels have become larger in cross section, with plans for a 16m diameter shield tunnel, for example, and as a result, larger special segment SGs (e.g., weighing 11 tons) have also been used. However, even with large cross sections, the space available within a shield tunnel is extremely limited, making it difficult to use large lifting equipment. For this reason, special segment SGs have traditionally been hoisted using small (e.g., 4.9-ton) telescopic crawler cranes, bridge cranes, teraherons, electric or manual chain hoists, and other equipment.

[0007] As such, installing special segments (SGs) in a narrow space is inefficient and unsafe. Therefore, various technologies for efficiently installing segments in narrow shield tunnels have been proposed. For example, Patent Document 1 proposes a lift-type segment assembly device that uses a two-tiered table lift, stacked one above the other, to raise and lower the segments. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-89371 Summary of the Invention [Problem to be solved by the invention]

[0009] The invention disclosed in Patent Document 1 makes it possible to assemble and remove segments more easily and safely than previous technologies, even in narrow spaces. Furthermore, even in cases involving tunnels with relatively large cross sections, a sufficient lifting stroke can be ensured by using two-tiered table lifts, one above the other. However, as a result of stacking the table lifts in two tiers, the weight of the upper table lift acts on the lower table lift in addition to the weight of the segments. Therefore, depending on the weight of the large segments used in large-scale shield tunnels, the lower table lift may not be able to withstand the load, making the lift-type segment assembly device disclosed in Patent Document 1 inapplicable.

[0010] Furthermore, the lift-type segment assembly device in Patent Document 1 uses two stacked table lifts, one above the other, to ensure a lifting stroke, so the machine height becomes quite high when the stroke is at its shortest. The segments removed by the lift-type segment assembly device are lifted up by a separate lifting device, but the machine height makes it difficult to ensure sufficient hanging space. As a result, it becomes difficult to transfer the segments, and for these reasons, the invention in Patent Document 1 has also been difficult to adopt.

[0011] The object of the present invention is to solve the problems associated with the prior art, that is, to provide a lift-up type segment assembly device that is lighter than the prior art and can reduce the machine height when fully retracted. [Means for solving the problem]

[0012] The present invention was made with a focus on the fact that by making the support columns extendable up and down, it is possible to reduce the height of the machine and the weight of the equipment, and is an invention based on an unprecedented idea.

[0013] The lifting-type segment assembly device of the present invention is a device for lifting and lowering segments for shield tunnels, and is equipped with a support column, an upper base body, a support member, a lower jack, an upper jack, and a rotating jack. Of these, the support column is composed of a lower column, a middle column, and an upper column, each of which is arranged approximately vertically (including vertically), and the upper base body is attached to the top of the upper column. The support member, on which the gripper is provided, is placed on the upper base body, and the lower jack lifts and lowers the middle column, while the upper jack lifts and lowers the upper column. The middle column can move up and down relative to the lower column, and the upper column can move up and down relative to the middle column. The support member is pin-connected to the upper base body at one end and to the rotating jack at the other end. When the lower jack raises the middle column, the upper column and upper base body rise together with the middle column, causing the segment attached to the gripping body to rise, and when the upper jack raises the upper column, the upper base body rises together with the upper column, causing the segment attached to the gripping body to rise. Furthermore, when the rotating jack extends or retracts with the segment attached to the gripping body, the support rotates around the pin connection point together with the segment.

[0014] The lifting type segment assembly device of the present invention can also be configured with a lower column that can accommodate part of the middle column, and a middle column that can accommodate part of the upper column. In this case, when the lower jack raises the middle column, the middle column housed in the lower column is pulled out from the lower column and rises, and when the upper jack raises the upper column, the upper column housed in the middle column is pulled out from the middle column and rises.

[0015] The lifting type segment assembly device of the present invention can also be configured with a lower jack and an upper jack that can be extended and retracted up and down. The lower jack is connected at its upper part to the middle column, and the upper jack is connected at its upper part to the upper column. In this case, when the lower jack is extended, the middle column rises, and when the upper jack is extended, the upper column rises.

[0016] The lifting-type segment assembly device of the present invention may further include a portal structure consisting of a lower middle beam, an upper middle beam, an upper beam, and a plurality of support columns. The lower middle beam, which is arranged substantially horizontally (including horizontally), connects the middle column of one support column constituting the portal structure to the middle column of another support column. The upper middle beam, which is arranged above the lower middle beam and also substantially horizontally (including horizontally), connects the middle column of one support column constituting the portal structure to the middle column of another support column. The upper beam, which is arranged substantially horizontally (including horizontally), connects the upper column of one support column constituting the portal structure to the upper column of another support column. The lower jack is fixed at its upper part to the upper middle beam, the upper jack is fixed at its lower part to the lower middle beam and at its upper part to the upper beam, and the upper base body is fixed to the upper part of the upper beam. In this case, when the lower jack is extended, the upper and middle beams rise, causing the middle column to rise, and when the upper jack is extended, the upper beams rise, causing the upper column to rise.

[0017] The lifting type segment assembly device of the present invention may further include a support jack that moves the upper base body in a substantially horizontal direction (including horizontal) relative to the support column. In this case, when the support jack moves the upper base body with the segments attached to the gripping body, the segments move together with the upper base body in a substantially horizontal direction (including horizontal).

[0018] The lifting-type segment assembly device of the present invention can also be equipped with a lower base body and a base jack. This lower base body consists of a fixed base body and a movable base body, and the base jack moves the movable base body in an approximately horizontal direction (including horizontal) relative to the fixed base body. The lower column and the lower jack are fixed at their lower ends to the movable base body. In this case, when the base jack moves the movable base body with the segment attached to the gripper, the support column and upper base body move in an approximately horizontal direction (including horizontal) together with the movable base body, and the segment also moves in an approximately horizontal direction (including horizontal).

[0019] The lifting type segment assembly device of the present invention can also be configured with three or four or more adjusting jacks attached to the gripper. Note that these adjusting jacks can be extended and retracted independently. In this case, when the adjusting jacks extend and retract while the segments are attached to the gripper, the posture of the segments pressed against the adjusting jacks changes. [Effects of the Invention]

[0020] The lifting type segment assembly device of the present invention has the following effects. (1) In underground widening work, the removal and assembly of segments, especially near the top of the tunnel, can be carried out more efficiently than with conventional technology. (2) By rotating or sliding the segments attached to the supports, the segments can be installed in the appropriate position and posture even for tunnels with special cross-sectional shapes. (3) When configured to move across the tunnel, the elevating segment assembly device can be made smaller and lighter because it can work without placing a heavy load on the device. As a result, the device can be easily evacuated from its location, and construction machinery used for other work, such as excavation, removal of debris, and material delivery, can easily travel near the device. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view showing a state in which the lift-type segment assembly device of the present invention is placed inside an existing shield tunnel. [Figure 2] FIG. 2 is a side view showing the lift-up type segment assembly device of the present invention. [Figure 3] FIG. [Figure 4] FIG. 2 is an exploded side view showing a schematic view of a gate-shaped structure. [Figure 5] (a) is a cross-sectional view showing a schematic diagram of a portal structure with two support pillars, and (b) is a cross-sectional view showing a schematic diagram of a portal structure with four support pillars. [Figure 6] FIG. 2 is a side view schematically showing the lower jack, the upper jack, and the support column. [Figure 7] (a) is a cross-sectional view taken along the horizontal plane AA in Figure 6, and (b) is a cross-sectional view taken along the horizontal plane BB in Figure 6. [Figure 8] FIG. 2( a ) is a side view showing a schematic view of the support as seen from the side, and FIG. 2( b ) is a plan view showing a schematic view of the support as seen from above. [Figure 9] FIG. 10 is a side view showing a support that rotates in a substantially vertical plane by a rotating jack. [Figure 10] FIG. 10 is a partial cross-sectional view showing a gripping body to which segments are attached. [Figure 11] (a) is a partial front view of the connecting jig seen from the front, (b) is a partial side view of the connecting jig seen from the side, (c) is a plan view of the connecting jig seen from above, (d) is a plan view and cross-sectional view showing the opening of the segment, (e) is a plan view and cross-sectional view showing the connecting jig before it is inserted into the opening and rotated, and (f) is a plan view and cross-sectional view showing the connecting jig after it has been inserted into the opening and rotated. [Figure 12] FIG. 10 is a partial cross-sectional view showing an adjustment jack provided on the gripping body. [Figure 13] FIG. 4 is a partial cross-sectional view showing a horizontal jack provided on the gripping body. [Figure 14] FIG. 4 is a plan view schematically showing a support jack. [Figure 15] FIG. 4 is a side view schematically showing a lower base body on which a movable base body slides relative to a fixed base body. [Figure 16] FIG. 10 is a cross-sectional view schematically showing a state in which a new widening segment is installed in the widening section. DETAILED DESCRIPTION OF THE INVENTION

[0022] An embodiment of the lifting-type segment assembly device of the present invention will be described with reference to the drawings. The lifting-type segment assembly device of the present invention can be particularly suitably applied to underground widening work to expand the cross section of an existing shield tunnel, as well as construction work for shield tunnels with non-circular cross sections such as egg-shaped, elliptical, or a shape combining multiple arcs, and construction work for shield tunnels whose cross section gradually changes along the tunnel axis. For convenience, the following description will be given using an example of underground widening work.

[0023] 1.Overview The lifting-type segment assembly device of the present invention is a technology related to the "erector" used to assemble segments in shield tunnels, and is an invention that was obtained by improving on conventional erectors.

[0024] FIG. 1 is a cross-sectional view showing a situation in which a climbing-type segment assembly device 100 of the present invention is installed inside an existing shield tunnel TN. This climbing-type segment assembly device 100 can remove segments (hereinafter referred to as "existing segments SGe") that constitute the existing shield tunnel TN or install new segments (hereinafter referred to as "new segments SGn"). It is particularly suitable for installing and removing existing segments SGe and new segments SGn (collectively referred to as "segments SG") near the tunnel crown. For convenience, the tunnel axis direction (the depth direction in FIG. 1) will be referred to as the "longitudinal direction," and the horizontal direction perpendicular to the longitudinal direction will be referred to as the "transverse direction." In addition, the tunnel center side in the transverse direction will be referred to as the "inner space side," the opposite side as the "natural ground side," the tunnel face side in the longitudinal direction will be referred to as the "front," and the tunnel entrance side will be referred to as the "rear."

[0025] The shield tunnel TN shown in Figure 1 is undergoing underground widening work. The existing segment SGe remains in place on the left cross section, while the existing segment SGe has already been removed on the right cross section, and a new segment SGn is being installed. In this incomplete lining situation, a support member SP is installed in the center of the shield tunnel TN to support vertical loads, and a pipe roof PR is formed near the top of the underground widening section. A work platform ST is also installed in the widening section of the shield tunnel TN to accommodate the lift-type segment assembly device 100. A transport path TP is also installed for transporting the existing segment SGe, transporting the new segment SGn, and for other construction machinery to travel on. The lift-type segment assembly device 100 of the present invention can be made smaller than conventional technologies. Therefore, as shown in Figure 1, the lift-type segment assembly device 100 fits into the right side of the internal cross section, leaving the left side open as the transport path TP.

[0026] 2. Elevating type segment assembly device Next, the lifting type segment assembly device 100 of the present invention will be described in detail. FIG. 2 is a side view showing the lifting type segment assembly device 100 of the present invention. As shown in this figure, the lifting type segment assembly device 100 includes a support column 110, an upper base body 120, a support body 130, a lower jack 141, an upper jack 142, a rotary jack 143, and a gripper 170. It can also include a lower base body 160, a gate-shaped structure (described later), a hydraulic unit, a valve stand, and the like. Of these, the hydraulic unit provides power (hydraulic pressure) for the extension and retraction of the various jacks and other operations related to the various devices that make up the lifting type segment assembly device 100. However, for the operation of some devices, power from the hydraulic unit is provided via the valve stand.

[0027] Below, each of the main elements that make up the lift-type segment assembly device 100 of the present invention will be explained.

[0028] (Support pillar) 3 is a side view schematically showing the support column 110. As shown in this figure, the support column 110 is a so-called shaft member whose axial dimension is larger than its cross-sectional dimension, and is arranged so that its axial direction is approximately vertical (including vertical) when the lifting-type segment assembly device 100 is in use. The support column 110 is configured to include a lower column 111, a middle column 112, and an upper column 113. The lower column 111, which is fixed to the lower base body 160, does not move up and down, but the middle column 112 moves up and down relative to the lower column 111, and the upper column 113 moves up and down relative to the middle column 112. The lower column 111, middle column 112, and upper column 113 are formed from a material having a considerable strength, and for example, steel pipes such as square steel pipes, or shaped steel such as H-shaped steel or channel steel can be used. Although the example of FIG. 3 shows the support column 110 including only one middle column 112, the support column 110 can also be configured to include two or more middle columns 112.

[0029] The lower column 111, the middle column 112, and the upper column 113 can also be configured to accommodate one another. For example, in FIG. 3 , the lower column 111 and the middle column 112 are configured as hollow tubular members, forming a so-called telescopic (registered trademark) structure. That is, the lower column 111 can accommodate a part (or all) of the middle column 112 within it, and when the middle column 112 rises, the middle column 112 moves so as to be pulled out from the lower column 111. Similarly, the middle column 112 can accommodate a part (or all) of the upper column 113 within it, and when the upper column 113 rises, the upper column 113 moves so as to be pulled out from the middle column 112. Note that the lower column 111 and the middle column 112 are not limited to being hollow tubular, and can also be configured to accommodate a part of the cross section of the middle column 112 or the upper column 113 by using H-shaped steel, channel steel, or the like.

[0030] (gate type structure) 4 is an exploded side view that schematically shows a portal structure 150. As shown in this figure, the portal structure 150 is configured to include a plurality of support columns 110 (two in the figure), a lower-middle beam 151, an upper-middle beam 152, and an upper beam 153, and can also be configured to include a lower beam 154. The lower-middle beam 151, the upper-middle beam 152, the upper beam 153, and the lower beam 154 can be made of shaped steel such as H-shaped steel, angle steel, or channel steel, and are arranged so that their axial directions are approximately horizontal (including horizontal) when the lifting type segment assembly device 100 is in use.

[0031] The lower middle beam 151 and the upper middle beam 152 connect the middle column 112 of one support column 110 (left side in the figure) to the middle column 112 of the other support column 110 (right side in the figure). The upper middle beam 152 is arranged higher than the lower middle beam 151, meaning that two beams consisting of the lower middle beam 151 and the upper middle beam 152 are arranged between the two middle columns 112. The upper beam 153 connects one upper column 113 to the other upper column 113, and the lower beam 154 connects one lower column 111 to the other lower column 111. However, the upper beam 153 is arranged above the upper columns 113, and the lower beam 154 is arranged below the lower columns 111.

[0032] Because the middle column 112 moves up and down relative to the lower column 111, the integrated structure consisting of the lower middle beam 151, the upper middle beam 152, and the two middle columns 112 also moves up and down relative to the lower column 111. Similarly, because the upper column 113 moves up and down relative to the middle column 112, the integrated structure consisting of the upper beam 153 and the two upper columns 113 also moves up and down relative to the middle column 112.

[0033] The portal structure 150 can be configured with two support columns 110, or with three or more support columns 110. Figure 5 is a horizontal cross-sectional view of the portal structure 150, taken along a horizontal plane at the middle column 112, where (a) is a cross-sectional view schematically showing the portal structure 150 with two support columns 110, and (b) is a cross-sectional view schematically showing the portal structure 150 with four support columns 110.

[0034] In the example of Figure 5(a), the lower middle beam 151 and the upper middle beam 152 are arranged between two middle columns 112 that face each other in the transverse direction, and the left ends of the lower middle beam 151 and the upper middle beam 152 are fixed to the left middle column 112, while the right ends of the lower middle beam 151 and the upper middle beam 152 are fixed to the right middle column 112. In other words, the two middle columns 112 on the left and right are connected in the transverse direction, so to speak, by the lower middle beam 151 and the upper middle beam 152. Of course, the upper beam 153 is also arranged between two upper columns 113 that face each other in the transverse direction, and connects these upper columns 113 in the transverse direction. Since the middle column 112 moves up and down inside the lower column 111, and the upper column 113 moves up and down inside the middle column 112, it is advisable to cut out a portion of the lower column 111 so that the lower middle beam 151 and upper middle beam 152 fixed to the middle column 112 can also move back and forth, and similarly, to cut out a portion of the middle column 112 so that the upper beam 153 fixed to the upper column 113 can also move back and forth.

[0035] The portal structure 150 shown in FIG. 5(b) (hereinafter, specifically referred to as the "H-shaped portal structure 150") is composed of four support pillars 110. This H-shaped portal structure 150 will be described in detail below. In the H-shaped portal structure 150, the lower middle beam 151 and the upper middle beam 152 are arranged in the transverse direction as well as the longitudinal direction. For convenience, the lower middle beam 151 and the upper middle beam 152 arranged in the transverse direction will be referred to as the "transverse lower middle beam 151a" and the "transverse upper middle beam 152a," respectively, and the lower middle beam 151 and the upper middle beam 152 arranged in the longitudinal direction will be referred to as the "longitudinal lower middle beam 151b" and the "longitudinal upper middle beam 152b," respectively.

[0036] The longitudinal lower middle beam 151b and the longitudinal upper middle beam 152b are arranged between two middle columns 112 facing each other in the longitudinal direction, with the front ends (upper in the figure) of the longitudinal lower middle beam 151b and the longitudinal upper middle beam 152b fixed to the front middle column 112, and the rear ends (lower in the figure) of the longitudinal lower middle beam 151b and the longitudinal upper middle beam 152b fixed to the rear middle column 112. Two sets of structures consisting of this longitudinal lower middle beam 151b, longitudinal upper middle beam 152b, and middle column 112 are arranged facing each other in the transverse direction.

[0037] Between the two sets of structures described above, two beam members consisting of a transverse lower middle beam 151a and a transverse upper middle beam 152a are arranged in two locations, at the front (above in the figure) and rear (below in the figure). The front and rear transverse lower middle beams 151a are fixed at their interior side ends (left side in the figure) to the interior side longitudinal lower middle beams 151b, and their natural ground side ends (right side in the figure) to the natural ground side longitudinal lower middle beams 151b. Similarly, the front and rear transverse upper middle beams 152a are fixed at their interior side ends to the interior side longitudinal upper middle beams 152b, and their natural ground side ends to the natural ground side longitudinal upper middle beams 152b.

[0038] Of course, the upper beam 153 is also arranged in the transverse direction as well as the longitudinal direction, and has the same configuration as in Fig. 5(b). Note that, since the middle column 112 moves up and down inside the lower column 111, and the upper column 113 moves up and down inside the middle column 112, it is advisable to cut out a part of the lower column 111 so that the longitudinal lower-middle beam 151b and the longitudinal upper-middle beam 152b can also move back and forth, and similarly cut out a part of the middle column 112 so that the longitudinal upper beam 153 can move back and forth.

[0039] (Lower jack and upper jack) The lower jack 141 raises and lowers the middle column 112, and the upper jack 142 raises and lowers the upper column 113. These lower jack 141 and upper jack 142 are extendable and retractable up and down, and various conventional devices such as hydraulic jacks can be used for them. For example, the lower jack 141 and upper jack 142 shown in Figure 6 are extendable and retractable up and down, and are configured to raise and lower the middle column 112 and upper column 113 as they extend and lower. The extension and retraction of the lower jack 141 and upper jack 142 is performed using hydraulic pressure provided from a hydraulic unit via a valve stand.

[0040] Fig. 6 is a side view showing the lower jack 141, the upper jack 142, and the support pillars 110 in a schematic manner, Fig. 7(a) is a cross-sectional view taken along the horizontal plane AA in Fig. 6, and Fig. 7(b) is a cross-sectional view taken along the horizontal plane BB in Fig. 6. These figures show a gate structure 150 (Fig. 5(b)) that is formed by adding two support pillars 110 (hereinafter referred to as "auxiliary support pillars 110") to the natural ground side, that is, a gate structure 150 consisting of six support pillars 110 (hereinafter referred to as "reinforced gate structure 150" in particular).

[0041] As shown in FIG. 6 , the lower jack 141 has its lower part (e.g., bottom flange) fixed to the lower base body 160 (particularly, the movable base body 162) and its upper part (e.g., head flange) fixed to the upper-middle beam 152. On the other hand, the upper jack 142 has its lower part (e.g., bottom flange) fixed to the upper-middle beam 152 and its upper part (e.g., head flange) fixed to the upper column 113. As a result, when the lower jack 141 extends upward, the middle column 112 rises together with the upper-middle beam 152, and further, because the upper jack 142 is interposed, the upper column 113 also rises together with the upper beam 153. Furthermore, when the upper jack 142 extends upward, the upper column 113 rises together with the upper beam 153. As shown in Figure 2, an upper base body 120 is attached to the top of the upper column 113, and a support body 130 having a gripping body 170 mounted thereon is placed on the upper base body 120, so that when the upper column 113 rises, the segment SG attached to the gripping body 170 also rises.

[0042] When the lower jack 141 contracts downward, the middle column 112 descends together with the upper-middle beam 152, and the upper column 113 descends together with the upper beam 153. Also, when the upper jack 142 contracts downward, the upper column 113 descends together with the upper beam 153. Then, when the upper column 113 descends, the segment SG attached to the gripping body 170 also descends.

[0043] As described above, the reinforced portal structure 150 is composed of six support columns 110. That is, the square-shaped portal structure 150 is disposed on the interior space side, and auxiliary support columns 110 are disposed in front and behind the structure on the natural ground side. The middle columns 112 constituting the auxiliary support columns 110 are connected to the adjacent middle columns 112 on the interior space side by transverse lower middle beams 151a and transverse upper middle beams 152a. Similarly, the upper columns 113 constituting the auxiliary support columns 110 are connected to the adjacent upper columns 113 on the interior space side by upper beams 153. The lower columns 111 constituting the auxiliary support columns 110 are fixed to the upper surface of a lower base body 160 (particularly, a fixed base body 161), which will be described later. All six lower columns 111 shown in this figure are made of H-shaped steel.

[0044] The lower jack 141 and the upper jack 142 may be disposed near the support pillar 110. For example, in FIG. 7, the upper jack 142 is disposed close to the support pillar 110 that constitutes the square-shaped gate structure 150, and the lower jack 141 is disposed even closer to the upper jack 142. Furthermore, the upper jack 142 is disposed close to the two auxiliary support pillars 110, and the lower jack 141 is disposed even closer to the upper jack 142. Of course, the lower jack 141 and the upper jack 142 may be disposed next to each other in the order shown in FIG. 7, or the lower jack 141 to the upper jack 142 may be disposed next to each other in order of proximity to the support pillar 110.

[0045] (Support) As will be described later, the segments SG are directly attached to the gripping body 170. The support body 130 supports the gripping body 170 to which the segments SG are attached.

[0046] 8 is a diagram showing a schematic view of the support body 130, where (a) is a side view seen from the side and (b) is a plan view seen from above. As already mentioned, the upper base body 120 is attached to the top of the support column 110 (particularly the upper column 113), and the support body 130 is placed on the top surface of this upper base body 120 and is pin-connected to the upper base body 120 at the pin connection point CP. The pin connection point CP is provided near the end of the support body 130 that faces the natural ground when in use, which allows the support body 130 to rotate in a substantially vertical plane (including the vertical plane) around the pin connection point CP.

[0047] As shown in FIG. 8(b), the support body 130 can be formed by beam members 131 arranged on the left and right, and a connecting plate 132. The beam members 131 can be configured to include an upper flange and a web plate, and the support body 130 is formed by connecting the left and right beam members 131 with the connecting plate 132. The connecting position of the connecting plate 132 may be the bottom of the beam members 131 or the middle part in the height direction. Furthermore, the support body 130 is not limited to the configuration shown in FIG. 8, and can also be configured by a columnar member or a box-shaped member.

[0048] A gripper jack 146 is provided on the side of the support 130 (for example, the outer surface of the beam member 131). This gripper jack 146 extends and retracts along the support 130, and a conventional hydraulic jack can be used, with hydraulic pressure applied from a hydraulic unit via a valve stand for its extension and retraction operation. The gripper jacks 146 are provided on the left and right side of the support 130, and grippers 170 are attached to the left and right gripper jacks 146, respectively. This allows the grippers 170 to slide along the support 130. The grippers 170 should preferably be attached to the left and right gripper jacks 146 so as to straddle the top of the support 130.

[0049] As explained above, the support 130, which is pin-connected at the pin connection point CP, can rotate in a substantially vertical plane, and the means for rotating the support 130 is the rotary jack 143. This rotary jack 143 is an extendable device, and various conventional jacks such as a trunnion jack can be used. The extension and retraction operation of the rotary jack 143 uses hydraulic pressure provided from a hydraulic unit via a valve stand, just like the gripper jack 146.

[0050] A portion of the rotary jack 143 is pin-connected to the upper base body 120, and its upper end is pin-connected to the support body 130. For example, in Figure 9, the rotary jack 143 is pin-connected to the end of the upper base body 120 facing the interior space, and the upper end of the rotary jack 143 is pin-connected to the end of the support body 130 facing the interior space. The lifting type segment assembly device 100 can be equipped with one rotary jack 143, or can be equipped with two (or three or more) rotary jacks 143. When two rotary jacks 143 are equipped, they are arranged on both sides of the support body 130, and the upper ends of the rotary jacks 143 are pin-connected to the left and right side surfaces, respectively.

[0051] Because the support 130 is pin-connected to the upper base body 120 at the pin connection point CP, when the rotary jack 143 extends, the support 130 is lifted and rotates in the forward direction (e.g., clockwise) around the pin connection point CP. Conversely, when the rotary jack 143 contracts, the support 130 is pulled down and rotates in the reverse direction (e.g., counterclockwise) around the pin connection point CP. For example, the rotary jack 143 shown in Figure 9 has a structure in which the stroke portion contracts from the extension / retraction starting point BP. In other words, when this stroke portion extends, the support 130 is pushed up and rotates in the forward direction (clockwise in the figure), and when the stroke portion contracts, the support 130 is pushed down and rotates in the reverse direction (counterclockwise in the figure).

[0052] The gripper 170 is attached to the support 130 and directly grips the segment SG. As described above, the gripper 170 is attached to the gripper jack 146. This allows the gripper 170 to slide along the gripper jack 146, i.e., along the support 130.

[0053] 10 is a partial cross-sectional view showing a gripping body 170 to which a segment SG is attached. As shown in this figure, a connecting jig 171 is provided on the gripping body 170, and the gripping body 170 grips the segment SG by fitting this connecting jig 171 into an opening of the segment SG. Hereinafter, a so-called twist lock mechanism using the connecting jig 171 will be described with reference to FIG.

[0054] FIG. 11(a) is a partial front view of the connecting jig 171, FIG. 11(b) is a partial side view of the connecting jig 171, and FIG. 11(c) is a plan view of the connecting jig 171. As shown in these figures, the head HD of the connecting jig 171 is wide when viewed from one side but narrow when viewed from a perpendicular direction. Meanwhile, as shown in FIG. 11(d), a portion of the segment SG has an opening AP that is approximately the same shape as the head HD of the connecting jig 171 but slightly larger than the head HD. Then, as shown in FIG. 11(e), the connecting jig 171 is inserted into the opening AP with the head HD and opening AP aligned. Then, as shown in FIG. 11(f), the connecting jig 171 is rotated 90° within the opening AP. This locks the segment SG in place with the head HD of the connecting jig 171, i.e., the segment SG is attached to the gripper 170.

[0055] As described above, to lock the segments SG, it is necessary to move the connecting jig 171 in its axial direction (up and down in FIGS. 11(e) and 11(f)) and rotate it around its axis. For this reason, it is advisable to provide a control means for the gripper 170. Specifically, the control means can be configured using a hydraulic motor 172 and a push-pull jack 173 shown in FIG. 10. In other words, the extension and contraction of the push-pull jack 173 can be used to move the connecting jig 171 in the axial direction, and a structure consisting of a combination of the hydraulic motor 172, pinion, and gear can be used to rotate the connecting jig 171. The push-pull jack 173 and hydraulic motor 172 can be driven using hydraulic pressure applied from a hydraulic unit via a valve stand.

[0056] 12 is a partial cross-sectional view showing an adjusting jack 147 provided on the gripping body 170. This adjusting jack 147 is a jack that extends and retracts using hydraulic pressure provided from a hydraulic unit via a valve stand. However, each gripping body 170 is provided with three or more adjusting jacks 147, and they are not arranged in the same straight line. Of course, the three or more adjusting jacks 147 can each extend and retract independently.

[0057] To install the new segment SGn in a predetermined orientation (face orientation), some adjustment may be required. In such cases, the adjustment jack 147 can be used to adjust the predetermined face direction (yawing or pitching) of the orientation of the new segment SGn. In other words, with the new segment SGn attached to the gripping body 170, the orientation of the new segment SGn can be adjusted by extending or retracting a specific adjustment jack 147.

[0058] 13 is a partial cross-sectional view showing the horizontal jack 148 provided on the gripping body 170. Like the adjusting jack 147, this horizontal jack 148 is a jack that expands and contracts using hydraulic pressure applied from a hydraulic unit via a valve stand. The horizontal jack 148 expands and contracts in the longitudinal direction when in use, thereby allowing the connecting jig 171 to be pushed in. In other words, the horizontal jack 148 moves the connecting jig 171 of the gripping body 170 in the longitudinal direction, but does not move the entire gripping body 170 in the longitudinal direction.

[0059] A sealant may be installed between the newly constructed segments SGn arranged in the longitudinal direction, creating a gap between them before the new segment SGn is installed. However, the gap may be too wide or too narrow, and the newly constructed segment SGn may need to be pushed in the longitudinal direction after installation. In this case, the horizontal jack 148 can be used to adjust the position of the temporarily installed new segment SGn. In other words, the horizontal jack 148 is extended or retracted while the connecting jig 171 is inserted into the opening AP of the new segment SGn, thereby adjusting the position of the new segment SGn. Note that while Figure 12 shows an example in which horizontal jacks 148 are installed on both sides in the longitudinal direction, it is of course also possible to install a horizontal jack 148 on only one side.

[0060] 14 is a plan view showing a schematic diagram of the support jack 145. This support jack 145 is approximately horizontal (including horizontal) and extends and contracts in the longitudinal direction, and a conventional hydraulic jack can be used. The extension and contraction operation of the support jack 145 uses hydraulic pressure provided from a hydraulic unit via a valve stand.

[0061] The support jack 145 is fixed to, for example, the upper beam 153, and the upper base body 120 is attached to the tip of its stroke portion. In this case, the upper base body 120 is not fixed to the support column 110 (or the upper base body 120), that is, it is slidably placed on the support column 110, etc. As a result, when the support jack 145 extends and contracts in the vertical direction (approximately horizontal), the upper base body 120 moves in the vertical direction accordingly, and the segments SG attached to the support 130 and the gripping body 170 also move in the vertical direction. Note that to allow the upper base body 120 to move smoothly, rails may be laid on the support column 110 (or the upper base body 120), and the upper base body 120 may be moved on these rails.

[0062] (lower base body) The lower base body 160 is a member that supports the entire device, and when the lifting type segment assembly device 100 is in use, this lower base body 160 is fixed to the work platform ST. This lower base body 160 can be configured to remain fixed and immovable, or it can be configured so that a portion of it slides laterally. For example, the lower base body 160 shown in Figure 15 is configured to include a fixed base body 161 and a movable base body 162, and while the fixed base body 161 is fixed to the work platform ST and does not move, the movable base body 162 has a mechanism that allows it to slide laterally relative to the fixed base body 161.

[0063] A base jack 144 shown in Fig. 15 is used to slide the movable base body 162 in the transverse direction relative to the fixed base body 161. This base jack 144 is approximately horizontal (including horizontal) and expands and contracts in the transverse direction, and a conventional hydraulic jack can be used. The expansion and contraction of the base jack 144 uses hydraulic pressure applied from a hydraulic unit via a valve stand.

[0064] The base jack 144 is fixed to a fixed base body 161 via a clamp device, and a movable base body 162 is attached to the tip of its stroke portion. In addition, the support columns 110 (particularly the lower columns 111) are fixed at their lower ends to the movable base body 162, and the lower jack 141 is also fixed at its lower end to the movable base body 162. As a result, when the base jack 144 extends and contracts in the transverse direction (approximately horizontally), the movable base body 162 moves in the transverse direction accordingly, and the support columns 110, lower jack 141, and upper jack 142 move accordingly, and further the segments SG attached to the support body 130 and the gripper 170 also move in the transverse direction. Note that to allow the movable base body 162 to move smoothly, rails may be laid on the fixed base body 161, and the movable base body 162 may be moved on these rails.

[0065] (Traveling vehicle) The lifting type segment assembly device 100 of the present invention can also be equipped with a running body for traveling longitudinally within a tunnel. The running body can be configured by combining a drive unit (such as an engine or motor) with crawlers, tires, wheels and rails, etc., so that the lifting type segment assembly device 100 can be self-propelled. Alternatively, the running body can be configured with tires or wheels, etc., and can be towed by construction machinery, a winch, etc. [Industrial Applicability]

[0066] The lifting-type segment assembly device of the present invention can be used for shield tunnels of various uses, such as road tunnels constructed underground, as well as railway tunnels, tunnels for water and sewerage, utility conduits, tunnels for power and communications, etc. Considering that the present invention makes it possible to efficiently and safely construct social infrastructure in the form of tunnel structures, it can be said to be an invention that can be expected to not only be used industrially but also to make a great contribution to society. [Explanation of symbols]

[0067] 100 The lifting type segment assembly device of the present invention 110 (elevating segment assembly device) support column 111 Lower column (of a support column) 112 (of a supporting column) Middle column 113 Upper column (of a support column) 120 (elevating type segment assembly device) upper base body 130 (elevating segment assembly device) support 131 (support) beam member 132 (support) connecting plate 141 Lower jack (of elevating segment assembly device) 142 Upper jack (of elevating segment assembly device) 143 Rotating jack (for elevating segment assembly equipment) 144 (elevating segment assembly device) base jack 145 (elevating segment assembly device) support jack 146 (Lifting type segment assembly device) gripper jack 147 (elevating segment assembly device) adjusting jack 148 (elevating segment assembly device) horizontal jack 150 Gate-type structure (of elevating segment assembly equipment) 151 (Gate structure) Lower middle beam 151a (of the lower middle beams) Transverse lower middle beam 151b (of the lower middle beams) 152 (Gate structure) Upper and middle beam 152a (of the upper and middle beams) Transverse upper and middle beams 152b (of the upper and middle beams) 153 Upper beam (of a portal structure) 154 Lower beam (of a portal structure) 160 Lower base body (of elevating segment assembly device) 161 (of the lower base body) fixed base body 162 (of the lower base body) movable base body 170 (elevating type segment assembly device) gripper 171 (Grip) connecting jig 172 (Gripping body) hydraulic motor 173 (gripping body) push-pull jack AP (segmental) aperture BP (rotating jack) extension starting point CP pin connection point HD (connecting jig) head PR Pipe Roof SG Segment SGe Existing segment SGn Newly established segment SGs Special Segments SP support member ST Work Platform TN Shield Tunnel TP transport path

Claims

1. A device for raising and lowering segments for a shield tunnel, Support columns arranged vertically or approximately vertically and including lower columns, middle columns, and upper columns; an upper base body attached to an upper portion of the upper column; a support body placed on the upper base body and provided with a gripping body; a lower jack that raises and lowers the middle column; an upper jack that raises and lowers the upper column; a rotary jack having one end connected to the upper base body by a pin and the other end connected to the support by a pin; The middle column is movable up and down relative to the lower column, The upper column is movable up and down relative to the middle column, The support is connected to the upper base body at one end by a pin and to the rotary jack at the other end by a pin; When the lower jack raises the middle column, the upper column and the upper base body rise together with the middle column, thereby raising the segment attached to the gripping body, When the upper jack raises the upper column, the upper base body rises together with the upper column, thereby raising the segment attached to the gripping body, When the rotary jack extends or retracts with the segment attached to the gripper, the support rotates together with the segment around the pin connection point. A lifting type segment assembly device characterized by:

2. The lower column can accommodate a portion of the middle column, The middle column can accommodate a portion of the upper column, When the lower jack raises the middle column, the middle column housed in the lower column is pulled out from the lower column and raised, When the upper jack raises the upper column, the upper column housed in the middle column is pulled out from the middle column and raised.

2. The lift-type segment assembly device according to claim 1.

3. The lower jack is extendable and retractable up and down and is connected to the middle column at its upper part, The upper jack is extendable and retractable up and down and is connected to the upper column at its upper part, When the lower jack is extended, the middle column rises, When the upper jack is extended, the upper column rises.

2. The lift-type segment assembly device according to claim 1.

4. Further provided is a portal structure consisting of a lower middle beam, an upper middle beam, an upper beam, and a plurality of the support columns, The lower middle beam, which is arranged horizontally or approximately horizontally, connects the middle column related to the support column constituting the portal structure to the middle column related to another support column, The upper middle beam, which is arranged horizontally or approximately horizontally above the lower middle beam, connects the middle column related to the support column that constitutes the portal structure to the middle column related to another support column, The upper beam, which is arranged horizontally or approximately horizontally, connects the upper column related to the support column that constitutes the portal structure to the upper column related to another support column, The lower jack is fixed at an upper portion to the upper middle beam, The upper jack is fixed at a lower portion to the lower middle beam and at an upper portion to the upper beam, The upper base body is fixed to an upper portion of the upper beam, When the lower jack is extended, the upper and middle beams rise, causing the middle columns to rise, When the upper jack is extended, the upper beam rises, thereby raising the upper column.

4. The lift-type segment assembly device according to claim 3.

5. Further provided is a support jack that moves the upper base body horizontally or approximately horizontally relative to the support column, When the support jack moves the upper base body while the segment is attached to the gripper, the segment moves together with the upper base body in a horizontal or substantially horizontal direction.

2. The lift-type segment assembly device according to claim 1.

6. a lower base body consisting of a fixed base body and a movable base body; a base jack that moves the movable base body horizontally or substantially horizontally relative to the fixed base body, the lower column and the lower jack are fixed at their lower ends to the movable base body, When the base jack moves the movable base body with the segment attached to the gripping body, the support column and the upper base body move horizontally or approximately horizontally together with the movable base body, thereby moving the segment horizontally or approximately horizontally.

2. The lift-type segment assembly device according to claim 1.

7. Each of the gripping bodies is provided with three or four or more adjustment jacks, The adjusting jacks each extend and retract independently, When the adjusting jack extends or retracts with the segment attached to the gripping body, the posture of the segment pressed against the adjusting jack is changed.

2. The lift-type segment assembly device according to claim 1.

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