JP5036286B2 - Standing jig for heavy structure and rising method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a rising structure jig and a standing method for a heavy structure, and more particularly, to a heat transfer tube group block installation method suitable for reducing the number of cranes used for setting a heat transfer tube group block of an exhaust heat recovery boiler. .

  A combined power generation (combined cycle power generation) plant has a gas turbine for power generation and an exhaust heat recovery boiler that generates steam using the exhaust gas from the gas turbine (hereinafter sometimes referred to as HRSG (Heat Recovery Steam Generator)). This is a plant in which a steam turbine that generates power using steam generated by the HRSG is a main component.

  FIG. 1 shows a schematic configuration diagram of a horizontal HRSG. The horizontal HRSG includes a duct 7 through which exhaust gas from a gas turbine flows in a horizontal direction and a casing 6 surrounding the duct 7, and a plurality of heat transfer tube group blocks 2 on the downstream side. Is placed. In the heat transfer tube group block 2, heat transfer tube panels such as a superheater panel, a reheater panel, an evaporator panel, and a economizer panel are sequentially arranged from the upstream side.

FIG. 5 shows a method for raising the heat transfer tube group block 2 of the conventional horizontal HRSG.
The heat transfer tube group block 2 of the HRSG is configured by combining a plurality of heat transfer tube panels, and it is necessary to stand up so that damage to the finned tube due to bending of each panel does not occur. As shown in FIG. 5 (a), after the heat transfer tube group block 2 is mounted on the upright jig 1 while being turned sideways down, it is fixed by a fixing part using a bolt (not shown), As shown in FIG. 5 (b), the left end and the right end of the jig 1 are lifted up by the two lifting cranes 4 and 5 and lifted into the air while moving. The crane 5 on the right end (lower end) side was separated after standing up, and provided on the side surface of the HRSG casing 6 previously installed in the crane 4 on the other left end (upper end) side as shown in FIG. After moving up to the fall-preventing fixing bracket (not shown), it is hung and the upright jig 1 and the heat transfer tube group block 2 are locked. Thereafter, as shown in FIG. 5 (d), a construction method was used in which the heat transfer tube group block 2 was raised by the crane 4 and extracted from the jig 1 and set inside the HRSG casing 6.
JP 2003-222302 A JP 2004-263388 A

When only one lifting crane is used, the left end (upper end) of the horizontal heat transfer tube group block 2 is raised and lifted by the jig 1, and when the heat transfer tube group block 2 is raised approximately 90 °, Due to the relationship between the center of gravity, the intersection (contact point with the ground) and the force point (hanging point), the standing state of the heat transfer tube group block 2 becomes unstable, and the heat transfer tube group block 2 shakes and becomes uncontrollable for a while. There is a risk. Moreover, an impact will be given to a crane etc. with a runout, and it will become the operation | work which a malfunction produces.
Therefore, normally, in order to stand up stably, it is necessary to prepare the two lifting cranes 4 and 5 and to stand up the heat transfer tube group block 2 as described above.

  An object of the present invention is to provide an upright jig and a standing up method for a heavy structure such as a heat transfer tube group block that reduces the crane cost that occupies a large weight of the HRSG equipment installation work cost and reduces the work cost of the HRSG. Is to provide.

The above-mentioned problem of the present invention is solved by the following means.
According to the first aspect of the present invention, when the weight structure in which the longitudinal surface of the rectangular parallelepiped shape is disposed in the horizontal direction is erected with the longitudinal surface in the vertical direction, the weight structure is disposed in the horizontal direction. attached to the ground plane side of the ground of heavy construction, point suspension by crane provided at positions corresponding to the top portion after standing cause of heavy construction and (PA), a standing cause of weight structure A standing jig having a grounding point (PB) in contact with the ground in the process of
An error circle of the centroid point that is sufficiently large to absorb the error between the actual centroid point (MA) and the ideal centroid point (MK) of the heavy structure and that is formed around the ideal centroid point (MK). The center line (C) and weight of the heavy structure parallel to the normal (V) passing through the center (MK) of the MC and passing through the ground contact point (PB) in contact with the ground when the heavy structure starts to stand up The point of intersection (PCL) with the tangent (D) passing through the grounding point (PB) at the start of standing of the structure and tangent to the error circle (MC) of the center of gravity is an arc (PB-PF, where PF is a heavy structure) The weight is characterized in that a curved machining surface , which is a vertical line on the grounding surface of the standing jig 1 lowered from the intersection PCL when the object is standing, is formed on the grounding surface of the heavy structure with the ground. This is a jig for raising a structure.

According to the second aspect of the present invention, the weight structure in which the longitudinal surface of the rectangular parallelepiped shape is arranged in the horizontal direction is arranged in the horizontal direction when the longitudinal structure is raised in the vertical direction. attached to the ground plane side of the ground of heavy construction, point suspension by crane provided at positions corresponding to the top portion after standing cause of heavy construction and (PA), a standing cause of weight structure This is a standing jig having a ground contact point (PB) in contact with the ground in the process, and can sufficiently absorb the error between the actual gravity center (MA) and the ideal gravity center (MK) of the heavy structure. And a ground point (MK) that passes through the center (MK) of the error circle (MC) of the center of gravity formed around the ideal center of gravity (MK) and touches the ground when the heavy structure starts to rise ( The center line (C) of the heavy structure parallel to the normal (V) passing through PB) and the heavy structure At the intersection (PCL) with the tangent (D) that passes through the grounding point (PB) at the start of wake and touches the error circle (MC) at the center of gravity, the first arc (PM-PF, where PF is a heavy structure) The first curved machining surface centered on the grounding surface of the standing jig 1 lowered from the intersection PCL when standing up) is formed on the grounding surface of the heavy structure with the ground. From the ground contact point (PB) having a length shorter than the radius of the first arc (PM-PF), which is on the normal line (V) of the ground contact point (PB) at the start of the rising of the object A second curved surface with the point (PCS) as the center of the second arc (PB-PM) is formed on the ground contact surface with the ground of the heavy structure, and the first arc (PM-PF) and the The contact point (PM) of the second arc (PB-PM) is an extension line of the contact point (PT) between the point (PCS) and the error circle (MC) of the center of gravity ( ) And a point on the ground contact surface of the first arc (PM-PF), and the ground of the heavy structure is formed by the first arc (PM-PF) and the second arc (PB-PM). to form a ground plane and an elevation caused jig heavy construction characterized by.

The invention according to claim 3 is characterized in that the heavy structure is a heat transfer tube group block for an exhaust heat recovery boiler in which a plurality of heat transfer tube groups and upper and lower headers of the heat transfer tube groups are incorporated by a ceiling sling device. The weight structure rising jig according to claim 1 or 2.

According to a fourth aspect of the present invention, a weight structure having a rectangular parallelepiped longitudinal surface arranged in the horizontal direction is arranged in the horizontal direction when the longitudinal structure is raised in the vertical direction. 3. A method for raising a heavy structure using the upright jig according to claim 1 or 2, wherein the heavy weight structure is attached to a grounding surface side of the heavy structure with the ground. Three horizontal points consisting of the suspension point (PA), the actual center of gravity (MA) of the heavy structure, and the contact point (PB) of the upright jig that contacts the ground in the process of raising the heavy structure Using the above-mentioned rising jig in which the ground surface is curved so that the positional relationship in the direction does not change in the same order at all stages from the start to the end of the heavy structure. standing cause of heavy construction, wherein the lifting by one crane Te It is the law.

Wherein the claim 5 the described invention, heavy construction is a plurality of tube bank block for exhaust heat recovery boiler incorporating the ceiling sling device the upper and lower tube pulling the tube bank and tube banks The method for raising a heavy structure according to claim 4 .

  The heavy structure of the present invention is not limited to the heat transfer tube group block of HRSG, but corresponds to a large structure used as factory plant equipment, and the present invention can be used for the upright installation work.

According to the first, second, and fourth aspects of the present invention, since two lifting cranes that have conventionally been required for raising a heavy structure can be reduced to one, the construction cost can be greatly reduced.

Furthermore, according to the first aspect of the invention, the heavy weight in the standing cause operation of the structure, hanging point (PA) is an initial load (heavy construction required for initial standing cause of heavy construction It is possible to stand up without exceeding about 1/2) of the total load and without causing unstable load until the heavy structure rises.

Further, according to the second aspect of the invention, Ru can be relaxed support load at the ground point (PB) in the early standing cause operation of the heavy weight structural material.

According to invention of Claim 3, 5 , the crane cost which occupies the big weight of the installation installation construction cost of the heat transfer tube group block of HRSG can be reduced, and the construction cost of HRSG can be reduced significantly.

As an embodiment of the present invention, the rising of a heat transfer tube group block of HRSG which is a typical example of a heavy structure will be described with reference to the drawings.
FIG. 2 shows a method for raising the HRSG heat transfer tube group block 2 according to this embodiment. First, after standing at STEP 1 in FIG. 2A and setting the ground curing for standing at the lower end of the jig 1, the heat transfer tube group block 2 is suspended with the plane formed by the heat transfer tube group oriented horizontally. While being suspended by the balance 3, it stands up and is placed on the jig 1. Next, as shown in FIG. 2 (b), in STEP 2, the lifting crane 4 is erected and the left end of the jig 1 (the upper portion after lifting) is lifted to raise the right end of the raising jig 1. The heat transfer tube group block 2 is gradually raised by rotating around the ground contact surface (the lower portion after lifting). FIG. 2 (c) shows only the standing jig 1 and shows the standing image.

In order to facilitate the understanding of the embodiments of the present invention, the prior art will be described.
6 to 10 show the problems for raising the heat transfer tube group block 2 with a single crane as the prior art, and FIGS. 3 and 4 are diagrams illustrating the points of this embodiment for solving the problem. It is. In these drawings, for the sake of simplicity, the jig 1 and the heat transfer tube group block 2 are collectively represented by a rectangle (a rectangular parallelepiped).

  First, FIG. 6 is a diagram for explaining a standing procedure when a conventional heat transfer tube group block (heavy structure) 2 is lifted by a single crane. In FIG. 6, a virtual case will be described for easy understanding of the following description.

  The contact point (rotation center) of the rising jig 1 with the ground at the rising stage of the heat transfer tube group block 2 is a grounding point PB, and the grounding point PB and the grounding point PB are located on the opposite diagonal line. The actual barycentric point MA of the heat transfer tube group block 2 is arranged on a straight line connecting the hanging point PA of the rising jig 1. In addition, the horizontal interval between the perpendicular from the actual center of gravity MA and the ground point PB is LB, and the horizontal interval between the perpendicular from the actual center of gravity MA and the perpendicular from the suspension point PA is LA. . The interval LB and the interval LA change as the weighted object rises, but the STEP numbers are attached as subscripts to the intervals in each STEP.

  In FIG. 6, since the heat transfer tube group block 2 is homogeneous and assumes a rectangular parallelepiped shape, the interval LA and the interval LB are equal to each other at each step, and the actual center of gravity point MA is the suspension point PA. And an intermediate position on a straight line connecting the ground point PB. Further, the calculated center of gravity is set as an ideal center of gravity MK.

  Further, the suspension load (load applied to the suspension point PA) RA and the support load (load applied to the grounding point PB) RB also change as the heat transfer tube group block 2 rises, but each interval in each STEP is added. STEP numbers are attached as letters.

  Here, between STEP1 to STEP3, when the suspension point PA rotates from the start of the heat transfer tube group block 2 to the normal line V of the grounding point PB, the actual center of gravity MA and the suspension point PA are the grounding point PB. It is possible to stand up by bearing about 1/2 of the total load without changing the burden load of the support load RB and the suspension load RA.

  Further, STEP 4 shows a state in which all the points (the contact point PB, the actual center of gravity point MA, and the suspension point PA) are overlapped on the normal line V. In this case, the support load RB at the ground contact point PB and the load RA at the suspension point PA can theoretically take from 0 to the total weight, but if the transition from STEP3 to STEP4 is performed continuously, the suspension point PA. Takes the same load as 0 to STEP 3 (about 1/2 of the total load) and passes this point.

  Furthermore, when the transition from STEP 4 to STEP 5 is continuously performed, the load is borne under the same conditions as in STEP 1 to STEP 3, and therefore, in STEP 1 to STEP 5, the heat transfer tube group block 2 is stably set up. I can wake up.

  However, in the above case, the suspension point PA of the crane 4 and the center of gravity of the heat transfer tube group block 2 The actual center of gravity MA and the grounding point (rotation center) PB between the standing jig 1 and the ground are the heat transfer tube group block. It is an essential condition that they are always arranged in a straight line at the stage of 2 raising. In the planning and execution stage of the work, the ideal center of gravity MK of the heat transfer tube group block 2 and the actual center of gravity MA of the heat transfer tube group block 2 are not completely matched. However, this is not completely matched in actual work.

  FIG. 7 to FIG. 10 specifically explain the problem when the ideal center of gravity MK of the heat transfer tube group block 2 and the actual center of gravity MA of the heat transfer tube group block 2 do not match.

  FIGS. 7 and 8 show that the grounding point (rotation center) PB of the standing jig 1 when the heat transfer tube group block 2 is raised is always fixed at one point. FIG. 10 shows a case where the corner portion of the grounding point (rotation center) PB when the heat transfer tube group block 2 is raised is rounded so that the heat transfer tube group block 2 is easily rotated. The roundness of the corner portion on the side of the grounding point PB is a center point PCS having an appropriately large radius (for example, 300 mm) (on the ray V of the grounding point PB at the start of standing up, and at the initial grounding point of standing up) A curved surface is formed on the ground contact surface on the ground contact point PB side when the standing jig 1 starts to rise with a quarter arc PB-PM passing through PB.

  7 and 9 show a case where the actual center of gravity MA of the heat transfer tube group block 2 is shifted from the ideal center of gravity MK in the raising direction (rotating direction). The error circle MC of the center of gravity point indicates the range where the actual center of gravity point MA of the actual heat transfer tube group block 2 exists as an error circle centered on the ideal center of gravity point MK. The suspension point PA is disposed on an extension line of the grounding point PB and the ideal center of gravity MK.

  In this state, when the heat transfer tube group block 2 is erected, the support load RB at the ground point PB increases and the suspension load RA at the suspension point PA decreases as the process proceeds from STEP 1 to STEP 2, and STEP 3 In this state, the entire load is completely applied to the contact point PB, and the suspension point PA has a very small suspension load RA. Up to this point, since the load of the suspension load RA of the suspension point PA does not increase, there is no problem with the rise of the heat transfer tube group block 2, but the actual center of gravity MA of the heat transfer tube group block 2 is normal to the grounding point PB. The unstable state of the suspension load RA occurs at a stage exceeding V (state of STEP 4), and the heat transfer tube group block 2 has a moment M (= actual center of gravity MA × perpendicular from actual center of gravity MA and contact point PB. With the rotational force LB4) in the horizontal direction, the action of rotating at once occurs naturally, and the state of STEP3 is shifted to the state of STEP5. In this state, the suspension point PA may be subjected to the rotational force generated by the moment M and the total load of the heat transfer tube group block 2. The state in which almost the entire load of the heat transfer tube group block 2 is applied to the suspension point PA continues until STEP 6 which is the final state. In order to avoid such a problem, it is necessary to apply a horizontal force RH4 in the direction opposite to the rotation direction from the suspension point PA to the suspension point PA, but in principle, the crane cannot bear the horizontal force. For this reason, it is impossible to avoid a state in which a malfunction occurs.

  On the other hand, FIG. 8 and FIG. 10 show a case where the actual center of gravity MA of the heat transfer tube group block 2 is shifted from the ideal center of gravity MK in the direction opposite to the rising direction (rotation direction). The error circle MC at the center of gravity indicates an error circle centered on the ideal center of gravity MK where the actual center of gravity MA of the heat transfer tube group block 2 exists. The suspension point PA is disposed on an extension line of the grounding point PB and the ideal center of gravity MK.

  In this state, when the heat transfer tube group block 2 is erected, the support load RB at the contact point PB decreases and the suspension load RA at the suspension point PA increases as the process proceeds from STEP 1 to STEP 2, STEP 3 In this state, the entire load is completely applied to the suspension point PA. In this state, if the heat transfer tube group block 2 is further raised from this state, the heat transfer tube group block 2 has a moment M (= the vertical line from the actual gravity center MA × the actual gravity center MA and the vertical line from the suspension point PA. In order to further raise the heat transfer tube group block 2, the horizontal force RH4 in the rotational direction from the suspension point PA is applied to the suspension point PA. There is a need to load. In principle, the crane cannot bear a horizontal force, but this horizontal force is required up to STEP5. In STEP5, almost the entire load of the heat transfer tube group block 2 is applied to the grounding point PB. From STEP5 to STEP6, the heat transfer tube group block 2 can be stably raised.

  As described above, in reality, it is impossible to completely place the actual center point MA of the heat transfer tube group block 2 and the ideal center point MK, and as described with reference to FIGS. Therefore, it is necessary to prepare a large crane that can load the entire load for the crane used for the suspension point PA.

  3 and 4 solve the problems of the prior art as described with reference to FIGS. 7 to 10, and the heat transfer tube group block 2 can be stably erected, and the crane used for erection The present embodiment will be described in which the capacity can be reduced to about ½ of the heat transfer tube group block 2 and an inexpensive crane can be used.

  In FIG. 3, the suspension point PA is set at a position lower than the error circle MC at the center of gravity in the state of STEP1. At this time, the error circle MC at the center of gravity is surely positioned above the line connecting the ground point PB and the suspension point PA in this state. Then, when the heat transfer tube group block 2 is erected, the grounding surface of the rising jig 1 which becomes the lower end is made into a curved surface shape indicated by oblique lines in advance. This curved surface is a tangent line D passing through the contact point PT between the grounding point PB and the center of gravity error circle MC, and a center line C of the heat transfer tube group block 2 passing through the ideal center of gravity point MK of the heat transfer tube group block 2 (starting to stand up). Standing jig 1 lowered from the intersection PCL when the grounding point PB and the heat transfer tube group block 2 stand up, centering on the intersection PCL with the line passing through the ideal gravity center MK parallel to the ray V of the grounding point PB at the time The curved surface of the grounding surface of the jig 1 is formed upright on an arc (PB-PF) passing through the perpendicular PF on the grounding surface.

  Next, the case where the heat transfer tube group block 2 shown in FIG. 3 is raised will be described. The actual center of gravity MA of the heat transfer tube group block 2 may be anywhere in the error circle MC of the center of gravity, In FIG. 3, the ideal barycentric point MK is described as the actual barycentric point MA.

  From STEP 1, the heat transfer tube group block 2 starts to rise, and until STEP 3, the grounding point PB is located at an initial point, and the heat transfer tube group block 2 is raised while rotating around this point. At this time, the load at the suspension point PA is gradually reduced, and the load at the ground contact point PB is increased. Thereafter, as the heat transfer tube group block 2 is raised in the state of STEP4 to STEP6, the grounding point PB moves on the arcuate curved surface of the shaded portion, but the ideal center of gravity MK of the heat transfer tube group block 2 (actual Centroid point MA) does not exceed the normal V of the ground point PB. For this reason, until it reaches STEP3 to STEP6, the load applied to the suspension point PA and the grounding point PB is substantially constant, and the heat transfer tube group block 2 can be erected stably.

  Accordingly, in the rising operation of the series of heat transfer tube group blocks 2, the suspension point PA is the initial load required at the initial stage of the heat transfer tube group block 2 (about 1 of the total load of the heat transfer tube group block 2). / 2), and without causing instability of load until the heat transfer tube group block 2 rises, it is possible to stand up. The important point here is that the relationship between the grounding point PB, the ideal center of gravity MK (actual center of gravity MA), and the suspension point PA is always in the heat transfer tube group block 2 at all stages of the rise of the heat transfer tube group block 2. The order is not changed when viewed from the rising direction of 2, and the initial value of the ratio of the distance LA to the distance LB (LA / LB) is minimized.

  4 is similar to the heat transfer tube group block 2 described with reference to FIG. 3, but an arc-shaped surface constituting a contact portion (shaded portion) with the ground including the grounding point PB is formed of two types of arcs. It is a thing. A center point PCS having an appropriately large radius (for example, 300 mm) (a ground point PB on the ray V of the ground point PB at the start of rising and having a length shorter than the radius of a first arc PM-PF described later) On the ground surface of the rising jig 1 through the extension line D of the contact point PT between the center point PCS and the error circle MC of the center of gravity point. The PCL is also positioned on the extended line D.). A curved surface composed of the second arc PB-PM and the first arc PM-PF rises continuously and is formed on the grounding surface of the jig 1. Even with such a curved surface shape, the heat transfer tube group block 2 can be stably raised in the same manner as in FIG. 3, but in the method of raising the heat transfer tube group block 2 shown in FIG. The difference from the rising method of the heat transfer tube group block 2 is that the grounding point PB moves on the arc-shaped surface from the initial stage of the rising. The advantage in this case is that the supporting load of the grounding point PB can be eased at the initial stage of raising the heat transfer tube group block 2.

  According to the present invention, since the HRSG heat transfer tube group block can be erected with one lifting crane, the construction cost can be greatly reduced, and the industrial applicability is high.

The schematic block diagram of horizontal type | mold HRSG is shown. The figure explaining the installation method of the heat exchanger tube group block to which the Example of this invention is applied is shown. In order to safely stand up the heat transfer tube group block with a single crane, the horizontal order of the suspension point, the center of gravity, and the contact point of the ground is not changed in all states from the start to the end. Explanatory drawing of the standing-up method using the standing-up jig | tool of the shape which gave the round process to the bottom part ground surface is shown. In order to safely stand up the heat transfer tube group block with a single crane, the horizontal order of the suspension point, the center of gravity, and the contact point of the ground is not changed in all states from the start to the end. An explanatory view of an uprising method using an upright jig in which a rounding process is provided on the bottom grounding surface and a small rounding process is provided on the bottom grounding surface so that a corner does not stand even at the initial stage of rotation is shown. The figure explaining the installation method of the heat exchanger tube group block of a prior art is shown. The explanatory view of the ideal figure (desk plan) at the time of standing up a heat exchanger tube group block with one crane is shown. The figure explaining the practical problem at the time of standing up the heat-transfer tube group block of the shape where the contact part with the ground was square by one crane is shown. The figure explaining the practical problem at the time of standing up the heat-transfer tube group block of the shape where the contact part with the ground was square by one crane is shown. The figure explaining the practical problem at the time of standing up the heat-transfer tube group block using the standing-up jig of the shape which carried out the round process in order to make it easy to rotate to the contact part with the ground with one crane. Show. The figure explaining the practical problem at the time of standing up the heat-transfer tube group block using the standing-up jig of the shape which carried out the round process in order to make it easy to rotate to the contact part with the ground with one crane. Show.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Standing jig 2 Heat transfer tube group block 3 Lifting balance 4, 5 Lifting crane 6 HRSG casing 7 Duct

Claims (5)

In raising the heavy structure in which the longitudinal surface of the rectangular parallelepiped shape is oriented in the horizontal direction with respect to the ground of the heavy structure arranged in the horizontal direction, the vertical surface is raised in the vertical direction. mounted on the ground plane side, point suspension by crane provided at positions corresponding to the top portion after standing cause of heavy construction and (PA), the ground point of contact with the ground in the course of the standing cause of weight structure (PB) a standing cause jig with,
An error circle of the centroid point that is sufficiently large to absorb the error between the actual centroid point (MA) and the ideal centroid point (MK) of the heavy structure and that is formed around the ideal centroid point (MK). The center line (C) and weight of the heavy structure parallel to the normal (V) passing through the center (MK) of the MC and passing through the ground contact point (PB) in contact with the ground when the heavy structure starts to stand up The point of intersection (PCL) with the tangent (D) passing through the grounding point (PB) at the start of standing of the structure and tangent to the error circle (MC) of the center of gravity is an arc (PB-PF, where PF is a heavy structure) weight, characterized in that to form a curved working surface to the object which is perpendicular on the ground plane of the upright raised jig 1 drawn from the intersection PCL when standing in) the ground plane with the ground of heavy construction Standing jig for structures. In raising the heavy structure in which the longitudinal surface of the rectangular parallelepiped shape is oriented in the horizontal direction with respect to the ground of the heavy structure arranged in the horizontal direction, the vertical surface is raised in the vertical direction. mounted on the ground plane side, point suspension by crane provided at positions corresponding to the top portion after standing cause of heavy construction and (PA), the ground point of contact with the ground in the course of the standing cause of weight structure (PB) a standing cause jig with,
The error of the center of gravity formed with the ideal center of gravity (MK) as the center is large enough to absorb the error between the actual center of gravity (MA) and the ideal center of gravity (MK) of the heavy structure. The center line (C) of the heavy structure parallel to the normal (V) passing through the center (M) of the circle (MC) and passing through the ground contact point (PB) in contact with the ground when the heavy structure starts to rise. The intersection point (PCL) of the tangent line (D) that passes through the ground contact point (PB) at the start of standing of the heavy structure and touches the error circle (MC) of the center of gravity is defined as the first arc (PM-PF, where PF is a perpendicular line on the grounding surface of the standing jig 1 lowered from the intersection PCL when the heavy structure stands up.) The first curved machining surface having the center of the grounding surface of the heavy structure as the grounding surface Forming ,
The contact point (PB) having a length shorter than the radius of the first arc (PM-PF), which is on the normal line (V) of the contact point (PB) at the start of rising of the heavy structure. Forming a second curved surface with a point (PCS) from the center of the second arc (PB-PM) on the ground contact surface of the heavy structure,
The contact point (PM) between the first arc (PM-PF) and the second arc (PB-PM) is an extension line of the contact (PT) between the point (PCS) and the error circle (MC) of the center of gravity. Passing through (D) and being on the ground contact surface of the first arc (PM-PF);
Said first arc (PM-PF) and the second arc (PB-PM) by weight structure, characterized in that <br/> having formed a ground plane with the ground of heavy construction stand Raising jig. Weight structures, according to claim 1 or 2, wherein the a plurality of tube bank block for exhaust heat recovery boiler incorporating the ceiling sling device the upper and lower tube pulling the tube bank and tube banks Standing jig for heavy structure. In raising the heavy structure in which the longitudinal surface of the rectangular parallelepiped shape is oriented in the horizontal direction with respect to the ground of the heavy structure arranged in the horizontal direction, the vertical surface is raised in the vertical direction. A method for erecting a heavy structure using the erecting jig according to claim 1 or 2 attached to the ground surface side,
The lifting point (PA) of the standing jig by the crane, the actual center of gravity (MA) of the heavy structure, and the contact point of the rising jig that contacts the ground in the process of raising the heavy structure ( The ground contact surface was curved so that the horizontal positional relationship of the three points consisting of PB) did not change in the same order at all stages from the start to the end of the heavy structure. A method for erecting a heavy structure, wherein the elevating jig is lifted by a single crane. Weight structures, the weight of claim 4, wherein the a plurality of tube bank block for exhaust heat recovery boiler incorporating the ceiling sling device the upper and lower tube pulling the tube bank and tube banks How to raise the structure .

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