Assembling method for large-span truss

Abstract

The present invention relates to the field of constructional engineering. Disclosed is an assembling method for a large-span truss, comprising the steps: pre-assembling a column top truss on the column top of each structural column; assembling an intermediate truss on a platform between every two adjacent structural columns; mounting a column top hydraulic lifting device on each column top truss; respectively setting lifting points at two ends of each intermediate truss; respectively connecting the column top hydraulic lifting devices to the corresponding lifting points; lifting each intermediate truss to a designed height; respectively connecting the intermediate trusses to the column top trusses; and removing the column top hydraulic lifting devices. A column top truss is provided on the column top of each structural column and serves as a mounting frame for a corresponding column top hydraulic lifting device, so that after an intermediate truss is assembled, the intermediate truss can be lifted, and then the effect of assembling the intermediate truss and the column top trusses can be achieved, thereby solving the problem that large hoisting devices cannot enter a center construction area for hoisting operation due to limitation of a space of a construction site.

Description

Assembly method of long-span truss Technical Field

[0001] The present invention relates to the field of construction engineering, and in particular to an assembling method of a large-span truss. Background Art

[0002] Large-span, large-tonnage steel truss structure projects such as large stations and convention and exhibition centers are usually assembled on the ground and then hoisted to the designed height. Due to the limited space on the construction site, large hoisting equipment is often unable to enter the central construction area for hoisting operations, which brings certain difficulties to the hoisting of the steel trusses.

[0003] Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a method for assembling a long-span truss. The present invention adopts the following technical solutions:

[0005] The present invention provides a method for assembling a long-span truss, comprising the following steps:

[0006] S1: Pre-assemble the column top truss at the top of the structural column;

[0007] S2: Assemble the intermediate trusses separately on the platforms between adjacent structural columns;

[0008] S3: Installing a column top hydraulic lifting device on the column top truss; wherein the column top truss at the end has the column top hydraulic lifting device installed on one side, and the column top truss at the middle has the column top hydraulic lifting device installed on both sides;

[0009] S4: Setting lifting points at both ends of the middle truss;

[0010] S5: Connecting the column top hydraulic lifting devices to the corresponding lifting points respectively;

[0011] S6: lifting the intermediate trusses to the designed heights respectively;

[0012] S7: Connecting the intermediate trusses to the column top trusses respectively;

[0013] S8: Remove the column top hydraulic lifting device.

[0014] Furthermore, in step S2, when the intermediate truss is composed of two sections of different heights, the following steps are included:

[0015] S21: Assemble the high truss and the low truss on the platform respectively;

[0016] S22: Installing an intermediate hydraulic lifting device on a side of the upper truss close to the lower truss, and respectively setting the lifting points at both ends of the lower truss and a side of the upper truss away from the lower truss;

[0017] S23: Connecting the column top hydraulic lifting device and the intermediate hydraulic lifting device to the corresponding lifting points respectively;

[0018] S24: lifting the lower truss to the height of the upper truss and connecting the two;

[0019] S25: Dismantle the intermediate hydraulic lifting device.

[0020] Furthermore, the column top hydraulic lifting device includes:

[0021] a lifting beam 1 connected to the upper chord of the column top truss;

[0022] There are three web members (1), two of which are arranged on both sides of the lifting beam (1), and the other web member (1) is arranged below the lifting beam (1); the ends of the web members (1) located on both sides of the lifting beam (1) are respectively connected to the lifting beam (1) and the upper chord of the column top truss, and the ends of the web member (1) located below the lifting beam (1) are respectively connected to the lifting beam (1) and the structural column;

[0023] A hydraulic lifter 1 is arranged on the lifting beam 1, and the hydraulic lifter 1 is connected to the corresponding lifting point.

[0024] Furthermore, the column top hydraulic lifting device includes:

[0025] A second lifting beam is arranged in parallel and spaced apart above the lower chord of the column top truss, and the second lifting beam is connected to the structural column;

[0026] A second web member is obliquely arranged between the second lifting beam and the lower chord of the column top truss, and the two ends of the second web member are respectively connected to the second lifting beam and the structural column;

[0027] A second hydraulic lifter is provided on the second lifting beam, and the second hydraulic lifter is connected to the corresponding lifting point.

[0028] Furthermore, the column top hydraulic lifting device includes:

[0029] There are two lifting beams three, the two lifting beams three are arranged in an L-shaped structure in the horizontal direction above the lower chord of the column top truss, the two lifting beams three are respectively connected to the structural columns, and one of the lifting beams three is parallel to the lower chord of the column top truss;

[0030] Stiffening rib 1, the top surface and the bottom surface of the lifting beam 3 are both provided with the stiffening rib 1, and the two ends of the stiffening rib 1 are respectively connected to the lifting beam 3 and the structural column;

[0031] Hydraulic lifter three, each of the lifting beams three is provided with the hydraulic lifter three, and the hydraulic lifters three are respectively connected to the corresponding lifting points.

[0032] Furthermore, the column top hydraulic lifting device includes:

[0033] There are two lifting beams four, which are arranged in a straight line in the horizontal direction above the lower chord of the column top truss. The two lifting beams four are respectively connected to the structural columns, and the lifting beams four are parallel to the lower chord of the column top truss.

[0034] Stiffening ribs 2 are provided on the top and bottom surfaces of each of the lifting beams 4, and the two ends of the stiffening ribs 2 are respectively connected to the lifting beams 4 and the structural columns;

[0035] Hydraulic lifter four, each of the lifting beams four is provided with the hydraulic lifter four, and the hydraulic lifter four is respectively connected to the corresponding lifting point.

[0036] Furthermore, the intermediate hydraulic lifting device includes:

[0037] a lifting beam 5, arranged on the top surface of the upper chord of the high truss, and having two ends connected to the upper chord of the high truss respectively;

[0038] There are two web members three, which are arranged in a V shape; the two ends of the web members three are respectively connected to the lifting beam five and the lower chord of the high truss;

[0039] The hydraulic lifter five is arranged on the lifting beam five, and the hydraulic lifter five is connected to the corresponding lifting point.

[0040] Furthermore, the intermediate hydraulic lifting device includes:

[0041] There are two vertical poles, which are arranged in parallel and spaced apart, and the bottom ends of the vertical poles are connected to the upper chord of the high truss;

[0042] Two horizontal rods are provided, and the two horizontal rods are arranged in parallel and spaced apart; one end of the horizontal rod is connected to the top of the vertical rod, and the other end of the horizontal rod extends toward the direction close to the lower truss;

[0043] A sixth lifting beam is provided above a side of the horizontal rod away from the vertical rod, and both ends of the sixth lifting beam are respectively connected to the horizontal rod;

[0044] Two web members (4) are provided, and the two web members (4) are arranged in parallel and spaced apart on both sides below the lifting beam (6); one end of the web member (4) is connected to the lifting beam (6), and the other end of the web member (4) extends downwardly in a direction close to the vertical pole and is connected to the lower chord of the high truss;

[0045] A connecting rod is provided between the two upright poles, and both ends of the connecting rod are respectively connected to the tops of the upright poles;

[0046] Two rear tie rods are provided, and the two rear tie rods are arranged in parallel and spaced apart on a side of the vertical rod away from the horizontal rod; one end of the rear tie rod is connected to the top of the vertical rod, and the other end of the rear tie rod extends downward in a direction away from the horizontal rod and is connected to the upper chord of the high truss;

[0047] A hydraulic lifter six is ​​provided on the lifting beam six, and the hydraulic lifter six is ​​connected to the corresponding lifting point.

[0048] Furthermore, the intermediate hydraulic lifting device includes:

[0049] A lifting beam seven is arranged above the upper chord of the high truss, and both ends of the lifting beam seven are respectively connected to the upper chord of the high truss;

[0050] There are two web members 5, which are arranged in parallel on both sides below the lifting beam 7; the two ends of the web members 5 are respectively connected to the lifting beam 7 and the lower chord of the high truss;

[0051] A hydraulic lifter seven is provided on the lifting beam seven, and the hydraulic lifter seven is connected to the corresponding lifting point.

[0052] Compared with the prior art, the present invention has the following beneficial technical effects:

[0053] By setting a column top truss at the top of the structural column and using it as a mounting frame for the column top hydraulic lifting device, the intermediate truss can be lifted after it is assembled, thereby achieving the effect of assembling the intermediate truss with the column top truss, solving the problem that large lifting equipment is often unable to enter the central construction area for lifting operations due to space limitations on the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention will be further described below with reference to the accompanying drawings.

[0055] FIG1 is a schematic diagram of the assembly structure of a large-span truss of the present invention;

[0056] FIG2 is a side view of a column top hydraulic lifting device according to a second embodiment of the present invention;

[0057] FIG3 is another side view of the column top hydraulic lifting device according to the second embodiment of the present invention;

[0058] FIG4 is a schematic diagram of the three-dimensional structure of a column top hydraulic lifting device according to a third embodiment of the present invention;

[0059] FIG5 is a schematic diagram of the three-dimensional structure of a column top hydraulic lifting device according to a fourth embodiment of the present invention;

[0060] FIG6 is a schematic diagram of the three-dimensional structure of a column top hydraulic lifting device according to a fifth embodiment of the present invention;

[0061] FIG7 is a schematic diagram of the three-dimensional structure of the intermediate hydraulic lifting device according to the sixth embodiment of the present invention;

[0062] FIG8 is a side view of an intermediate hydraulic lifting device according to a sixth embodiment of the present invention;

[0063] FIG9 is a side view of an intermediate hydraulic lifting device according to a seventh embodiment of the present invention;

[0064] FIG10 is a top view of the intermediate hydraulic lifting device of Example 7 of the present invention;

[0065] FIG11 is a schematic diagram of the three-dimensional structure of the intermediate hydraulic lifting device of the eighth embodiment of the present invention.

[0066] Explanation of the accompanying symbols: 1, structural column; 2, column top truss; 3, intermediate truss; 31, high truss; 32, low truss; 4, column top hydraulic lifting device; 41-1, lifting beam 1; 41-2, lifting beam 2; 41-3, lifting beam 3; 41-4, lifting beam 4; 42-1, web member 1; 42-2, web member 2; 42-3, stiffening rib 1; 42-4, stiffening rib 2; 43-1, hydraulic lifter 1; 43-2, hydraulic lifter 2; 43-3, hydraulic lifter Hydraulic lifter three; 43-4, hydraulic lifter four; 5, intermediate hydraulic lifting device; 51-1, lifting beam five; 51-2, vertical pole; 52-1, web member three; 52-2, horizontal pole; 53-1, hydraulic lifter five; 53-2, lifting beam six; 53-3, lifting beam seven; 54-2, web member four; 54-3, web member five; 55-2, connecting rod; 56-2, rear pull rod; 57-2, hydraulic lifter six; 57-3, hydraulic lifter seven; 6, lifting point. DETAILED DESCRIPTION

[0067] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0068] Example 1

[0069] As shown in FIG1 , this embodiment discloses a method for assembling a long-span truss, comprising the following steps: S1: pre-assembling a column top truss 2 at the top of a structural column 1. A portion of the truss is pre-assembled at the top of the structural column 1 according to the design drawings.

[0070] S2: Assemble the intermediate trusses 3 on the platforms between the adjacent structural columns 1. Assemble the remaining trusses on the platforms between the adjacent structural columns 1 according to the design drawings.

[0071] S3: Install a column top hydraulic lifting device 4 on the column top truss 2; wherein, the column top truss 2 located at the end has the column top hydraulic lifting device 4 installed on one side, and the column top truss 2 located in the middle has the column top hydraulic lifting device 4 installed on both sides.

[0072] S4: Lifting points 6 are respectively provided at both ends of the middle truss 3. The lifting points 6 are respectively provided at both ends of the lower chord of the middle truss 3.

[0073] S5: Connect the column top hydraulic lifting devices 4 to the corresponding lifting points 6. The lifting points 6 at both ends of the middle truss 3 are connected to the action ends of the corresponding column top hydraulic lifting devices 4 above.

[0074] S6: Lift the intermediate trusses 3 to the designed heights. The column top hydraulic lifting devices 4 are controlled to lift the intermediate trusses 3 simultaneously, thereby driving the intermediate trusses 3 to move upward until they reach the designed heights.

[0075] S7: Connect the middle trusses 3 to the column top trusses 2 respectively.

[0076] S8: Remove the column top hydraulic lifting device 4.

[0077] By adopting this solution, a column top truss 2 is set at the top of the structural column 1 and used as a mounting frame for the column top hydraulic lifting device 4. After the intermediate truss 3 is assembled, it can be lifted, thereby achieving the effect of assembling the intermediate truss 3 with the column top truss 2, solving the problem that due to the limitation of the construction site space, large lifting equipment is often unable to enter the central construction area for lifting operations; in addition, this method can expand the construction working area, thereby improving construction efficiency.

[0078] A further optimized solution, in step S2, when the intermediate truss 3 is composed of two sections of different heights, includes the following steps:

[0079] S21: Assemble the upper truss 31 and the lower truss 32 on the platform respectively. Assemble the upper truss 31 at the upper part of the platform and assemble the lower truss 32 at the lower part of the platform according to the design drawings.

[0080] S22: Install an intermediate hydraulic lifting device 5 on the side of the upper truss 31 close to the lower truss 32, and set lifting points 6 at both ends of the lower truss 32 and on the side of the upper truss 31 away from the lower truss 32.

[0081] S23: Connect the column top hydraulic lifting device 4 and the middle hydraulic lifting device 5 to the corresponding lifting points 6 respectively.

[0082] S24: Lift the lower truss 32 to the height of the upper truss 31 and connect the two.

[0083] S25: Remove the intermediate hydraulic lifting device 5.

[0084] By adopting this solution, the middle hydraulic lifting device 5 is used in conjunction with the column top hydraulic lifting device 4 to achieve the effect of lifting the lower truss 32, and then the lower truss 32 can be connected to the high truss 31 and then lifted.

[0085] Example 2

[0086] As shown in FIG. 2 and FIG. 3 , this embodiment discloses a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0087] In this embodiment, the structure of the column top hydraulic lifting device 4 is designed in detail. Specifically, the column top hydraulic lifting device 4 includes a lifting beam 41-1, a web 42-1 and a hydraulic lifter 43-1. The lifting beam 41-1 is horizontally arranged, and one end of the lifting beam 41-1 is welded to the upper chord of the column top truss 2; there are three webs 42-1, two of which are horizontally arranged on both sides of the lifting beam 41-1, and the other web 42-1 is inclined. It is arranged below the lifting beam 41-1; the two ends of the web member 42-1 located on both sides of the lifting beam 41-1 are respectively welded to the lifting beam 41-1 and the upper chord of the column top truss 2, and the two ends of the web member 42-1 located below the lifting beam 41-1 are respectively welded to the lifting beam 41-1 and the structural column 1; the hydraulic lifter 43-1 is fixedly installed in the middle of the top surface of the lifting beam 41-1, and the action end of the hydraulic lifter 43-1 is connected to the corresponding lifting point 6.

[0088] Example 3

[0089] As shown in FIG4 , this embodiment provides a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0090] In this embodiment, the structure of the column top hydraulic lifting device 4 is designed in detail. Specifically, the column top hydraulic lifting device 4 includes a lifting beam 41-2, a web 42-2 and a hydraulic lifter 43-2. ​​The lifting beam 41-2 is arranged in parallel and spaced above the lower chord of the column top truss 2, and one end of the lifting beam 41-2 is welded to the structural column 1; the web 42-2 is arranged obliquely between the lifting beam 41-2 and the lower chord of the column top truss 2, and the two ends of the web 42-2 are respectively welded to the lifting beam 41-2 and the structural column 1; the hydraulic lifter 43-2 is fixedly installed on the top surface of the lifting beam 41-2, and the action end of the hydraulic lifter 43-2 is connected to the corresponding lifting point 6.

[0091] Example 4

[0092] As shown in FIG5 , this embodiment discloses a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0093] In this embodiment, the structure of the column top hydraulic lifting device 4 is designed in detail. Specifically, the column top hydraulic lifting device 4 includes a lifting beam three 41-3, a stiffening rib one 42-3 and a hydraulic lifter three 43-3. There are two lifting beams three 41-3. The two lifting beams three 41-3 are arranged in an L-shaped structure in the horizontal direction above the lower chord of the column top truss 2. The two lifting beams three 41-3 are welded to the structural column 1 respectively, and one of the lifting beams three 41-3 is parallel to the lower chord of the column top truss 2; the top and bottom surfaces of the lifting beam three 41-3 are provided with stiffening ribs one 42-3, and the two ends of the stiffening rib one 42-3 are welded to the lifting beam three 41-3 and the structural column 1 respectively; a hydraulic lifter three 43-3 is fixedly installed on each lifting beam three 41-3, and the action ends of the hydraulic lifter three 43-3 are respectively connected to the corresponding lifting points 6.

[0094] Example 5

[0095] As shown in FIG6 , this embodiment discloses a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0096] In this embodiment, the structure of the column top hydraulic lifting device 4 is designed in detail. Specifically, the column top hydraulic lifting device 4 includes a lifting beam four 41-4, a stiffening rib two 42-4 and a hydraulic lifter four 43-4. There are two lifting beams four 41-4, and the two lifting beams four 41-4 are arranged in a straight line in the horizontal direction above the lower chord of the column top truss 2. The two lifting beams four 41-4 are welded to the structural column 1 respectively, and the lifting beam four 41-4 is parallel to the lower chord of the column top truss 2; the top and bottom surfaces of each lifting beam four 41-4 are provided with stiffening ribs two 42-4, and the two ends of the stiffening rib two 42-4 are welded to the lifting beam four 41-4 and the structural column 1 respectively; a hydraulic lifter four 43-4 is fixedly installed on each lifting beam four 41-4, and the action ends of the hydraulic lifter four 43-4 are respectively connected to the corresponding lifting points 6.

[0097] Example 6

[0098] As shown in FIG. 7 and FIG. 8 , this embodiment discloses a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0099] In this embodiment, the structure of the intermediate hydraulic lifting device 5 is designed in detail. Specifically, the intermediate hydraulic lifting device 5 includes a lifting beam five 51-1, a web member three 52-1 and a hydraulic lifter five 53-1. The lifting beam five 51-1 is arranged on the top surface of the upper chord of the high truss 31, and the two ends of the lifting beam five 51-1 are respectively welded to the upper chord of the high truss 31; there are two web members three 52-1, and the two web members three 52-1 are arranged in a V shape; the two ends of the web member three 52-1 are respectively welded to the lifting beam five 51-1 and the lower chord of the high truss 31; the hydraulic lifter five 53-1 is fixedly installed on the top surface of the lifting beam five 51-1, and the action end of the hydraulic lifter five 53-1 is connected to the corresponding lifting point 6.

[0100] The intermediate hydraulic lifting device 5 in this embodiment can be used in conjunction with any column top hydraulic lifting device 4 in the above-mentioned embodiments 2 to 5.

[0101] Example 7

[0102] As shown in FIG9-FIG10 , this embodiment discloses a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0103] In this embodiment, the structure of the intermediate hydraulic lifting device 5 is designed in detail. Specifically, the intermediate hydraulic lifting device 5 includes a vertical rod 51-2, a horizontal rod 52-2, a lifting cross beam 6 53-2, a web member 4 54-2, a connecting rod 55-2, a rear pull rod 56-2 and a hydraulic lifter 6 57-2. There are two vertical rods 51-2, which are arranged in parallel and spaced apart. The bottom end of the vertical rod 51-2 is welded to the upper chord of the high truss 31. There are two rods 52-2, and the two horizontal rods 52-2 are arranged in parallel and spaced apart. One end of the horizontal rod 52-2 is welded to the top of the vertical rod 51-2, and the other end of the horizontal rod 52-2 extends toward the direction close to the lower truss 32; the lifting beam 6 53-2 is set above the side of the horizontal rod 52-2 away from the vertical rod 51-2, and the two ends of the lifting beam 6 53-2 are respectively welded to the horizontal rod 52-2; there are two web members 4 54-2, and the two web members 4 54-2 are arranged in parallel and spaced on both sides below the sixth lifting beam 53-2; one end of the fourth web member 54-2 is welded to the sixth lifting beam 53-2, and the other end of the fourth web member 54-2 extends downward in a direction close to the vertical pole 51-2 and is welded to the lower chord of the high truss 31; a connecting rod 55-2 is provided between the two vertical poles 51-2, and the two ends of the connecting rod 55-2 are respectively welded to the top of the column; two rear pull rods 56-2 are provided, two The rear pull rods 56-2 are arranged in parallel and at intervals on the side of the vertical rod 51-2 away from the horizontal rod 52-2; one end of the rear pull rod 56-2 is welded to the top of the vertical rod 51-2, and the other end of the rear pull rod 56-2 extends downward in a direction away from the horizontal rod 52-2 and is connected to the upper chord of the high truss 31; the hydraulic lifter six 57-2 is fixedly installed on the top surface of the lifting beam six 53-2, and the action end of the hydraulic lifter six 57-2 is connected to the corresponding lifting point 6.

[0104] The intermediate hydraulic lifting device 5 in this embodiment can be used in conjunction with any column top hydraulic lifting device 4 in the above-mentioned embodiments 2 to 5.

[0105] Example 8

[0106] As shown in FIG11 , this embodiment discloses a method for assembling a large-span truss, and the description of the method is the same as that of the first embodiment.

[0107] In this embodiment, the structure of the intermediate hydraulic lifting device 5 is designed in detail. Specifically, the intermediate hydraulic lifting device 5 includes a lifting beam 7 53-3, a web member 54-3 and a hydraulic lifter 7 57-3. The lifting beam 7 53-3 is arranged above the upper chord of the high truss 31, and the two ends of the lifting beam 7 53-3 are respectively welded to the upper chord of the high truss 31; there are two web members 54-3, and the two web members 5 54-3 are arranged in parallel on both sides below the lifting beam 7 53-3; the two ends of the web member 54-3 are respectively welded to the lifting beam 7 53-3 and the lower chord of the high truss 31; the hydraulic lifter 7 57-3 is fixedly installed on the top surface of the lifting beam 7 53-3, and the action end of the hydraulic lifter 7 57-3 is connected to the corresponding lifting point 6.

[0108] The intermediate hydraulic lifting device 5 in this embodiment can be used in conjunction with any column top hydraulic lifting device 4 in the above-mentioned embodiments 2 to 5.

[0109] It should be noted that the hydraulic lifters described in the above embodiments 2 to 8 are all existing technologies, and their working principles and methods of use are well known and will not be described in detail here.

[0110] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A method for assembling a long-span truss, characterized in that: The steps include: S1: pre-assembling a column top truss (2) at the top of a structural column (1); S2: Assembling intermediate trusses (3) respectively on platforms between adjacent structural columns (1); S3: Installing a column top hydraulic lifting device (4) on the column top truss (2); wherein the column top truss (2) located at the end has the column top hydraulic lifting device (4) installed on one side, and the column top truss (2) located in the middle has the column top hydraulic lifting device (4) installed on both sides; S4: arranging lifting points (6) at both ends of the intermediate truss (3); S5: Connecting the column top hydraulic lifting devices (4) to the corresponding lifting points (6) respectively; S6: lifting the intermediate trusses (3) to the designed heights respectively; S7: Connecting the intermediate trusses (3) to the column top trusses (2) respectively; S8: Dismantle the column top hydraulic lifting device (4).

2. The method for assembling a long-span truss according to claim 1, characterized in that: In the step S2, when the intermediate truss (3) is composed of two sections of different heights, the following steps are included: S21: Assembling the upper truss (31) and the lower truss (32) on the platform respectively; S22: installing an intermediate hydraulic lifting device (5) on a side of the high truss (31) close to the low truss (32), and respectively setting the lifting points (6) at both ends of the low truss (32) and on a side of the high truss (31) away from the low truss (32); S23: connecting the column top hydraulic lifting device (4) and the intermediate hydraulic lifting device (5) to the corresponding lifting points (6) respectively; S24: lifting the lower truss (32) to the height of the upper truss (31), and connecting the two; S25: Dismantle the intermediate hydraulic lifting device (5).

3. The method for assembling a long-span truss according to claim 2, characterized in that: The column top hydraulic lifting device (4) comprises: A lifting cross beam (41-1) connected to the upper chord of the column top truss (2); There are three web members (42-1), two of which are arranged on both sides of the lifting beam (41-1), and the other web member (42-1) is arranged below the lifting beam (41-1); the two ends of the web member (42-1) located on both sides of the lifting beam (41-1) are respectively connected to the lifting beam (41-1) and the upper chord of the column top truss (2), and the two ends of the web member (42-1) located below the lifting beam (41-1) are respectively connected to the lifting beam (41-1) and the structural column (1); A hydraulic lifter (43-1) is arranged on the lifting beam (41-1), and the hydraulic lifter (43-1) is connected to the corresponding lifting point (6).

4. The method for assembling a long-span truss according to claim 2, characterized in that: The column top hydraulic lifting device (4) comprises: A second lifting beam (41-2) is arranged in parallel and at intervals above the lower chord of the column top truss (2), and the second lifting beam (41-2) is connected to the structural column (1); A second web member (42-2) is obliquely arranged between the second lifting beam (41-2) and the lower chord of the column top truss (2), and the two ends of the second web member (42-2) are respectively connected to the second lifting beam (41-2) and the structural column (1); The second hydraulic lifter (43-2) is arranged on the second lifting beam (41-2), and the second hydraulic lifter (43-2) is connected to the corresponding lifting point (6).

5. The method for assembling a long-span truss according to claim 2, characterized in that: The column top hydraulic lifting device (4) comprises: There are two lifting cross beams (41-3), and the two lifting cross beams (41-3) are arranged in an L-shaped structure in the horizontal direction above the lower chord of the column top truss (2). The third beams (41-3) are respectively connected to the structural columns (1), and one of the lifting cross beams (41-3) is parallel to the lower chord of the column top truss (2); A stiffening rib (42-3), the top surface and the bottom surface of the lifting beam (41-3) are both provided with the stiffening rib (42-3), and the two ends of the stiffening rib (42-3) are respectively connected to the lifting beam (41-3) and the structural column (1); A hydraulic lifter three (43-3), each lifting beam three (41-3) is provided with the hydraulic lifter three (43-3), and the hydraulic lifter three (43-3) is respectively connected to the corresponding lifting point (6).

6. The method for assembling a long-span truss according to claim 2, characterized in that: The column top hydraulic lifting device (4) comprises: Two lifting cross beams (41-4) are provided, and the two lifting cross beams (41-4) are arranged in a straight line above the lower chord of the column top truss (2) in the horizontal direction, and the two lifting cross beams (41-4) are respectively connected to the structural column (1), and the lifting cross beams (41-4) are parallel to the lower chord of the column top truss (2); Stiffening ribs 2 (42-4), the top surface and the bottom surface of each lifting beam 4 (41-4) are provided with the stiffening ribs 2 (42-4), and the two ends of the stiffening ribs 2 (42-4) are respectively connected to the lifting beam 4 (41-4) and the structural column (1); A hydraulic lifter four (43-4), each of the lifting beams four (41-4) is provided with the hydraulic lifter four (43-4), and the hydraulic lifter four (43-4) is respectively connected to the corresponding lifting point (6).

7. The method for assembling a long-span truss according to claim 2, characterized in that: The intermediate hydraulic lifting device (5) comprises: A lifting beam 5 (51-1) is arranged on the top surface of the upper chord of the high truss (31), and its The two ends are respectively connected to the upper chord of the high truss (31); Two web members (52-1) are provided, and the two web members (52-1) are arranged in a V shape; the two ends of the web members (52-1) are respectively connected to the lifting beam (51-1) and the lower chord of the high truss (31); A hydraulic lifter five (53-1) is arranged on the lifting beam five (51-1), and the hydraulic lifter five (53-1) is connected to the corresponding lifting point (6).

8. The method for assembling a long-span truss according to claim 2, characterized in that: The intermediate hydraulic lifting device (5) comprises: Two vertical poles (51-2) are provided, the two vertical poles (51-2) are arranged in parallel and spaced apart, and the bottom ends of the vertical poles (51-2) are connected to the upper chord of the high truss (31); Two horizontal rods (52-2) are provided, and the two horizontal rods (52-2) are arranged in parallel and spaced apart; one end of the horizontal rod (52-2) is connected to the top of the vertical rod (51-2), and the other end of the horizontal rod (52-2) extends in a direction close to the lower truss (32); A sixth lifting beam (53-2) is arranged above a side of the horizontal rod (52-2) away from the vertical rod (51-2), and both ends of the sixth lifting beam (53-2) are respectively connected to the horizontal rod (52-2); Two web members (54-2) are provided, and the two web members (54-2) are arranged in parallel and spaced apart on both sides below the lifting beam (53-2); one end of the web member (54-2) is connected to the lifting beam (53-2), and the other end of the web member (54-2) extends downwardly in a direction close to the vertical rod (51-2) and is connected to the lower chord of the high truss (31); A connecting rod (55-2) is arranged between the two upright poles (51-2), and both ends of the connecting rod (55-2) are respectively connected to the tops of the upright poles; Two rear pull rods (56-2) are provided, and the two rear pull rods (56-2) are arranged in parallel and spaced apart on a side of the vertical rod (51-2) away from the horizontal rod (52-2); one of the rear pull rods (56-2) One end of the rear tie rod (56-2) is connected to the top of the vertical rod (51-2), and the other end of the rear tie rod (56-2) extends downwardly in a direction away from the horizontal rod (52-2) and is connected to the upper chord of the high truss (31); A hydraulic lifter six (57-2) is arranged on the lifting beam six (53-2), and the hydraulic lifter six (57-2) is connected to the corresponding lifting point (6).

9. The method for assembling a long-span truss according to claim 2, characterized in that: The intermediate hydraulic lifting device (5) comprises: A lifting beam (53-3) is arranged above the upper chord of the high truss (31), and both ends of the lifting beam (53-3) are respectively connected to the upper chord of the high truss (31); Two web members (54-3) are provided, and the two web members (54-3) are arranged in parallel on both sides below the lifting beam (53-3); the two ends of the web member (54-3) are respectively connected to the lifting beam (53-3) and the lower chord of the high truss (31); A hydraulic lifter seven (57-3) is arranged on the lifting beam seven (53-3), and the hydraulic lifter seven (57-3) is connected to the corresponding lifting point (6).

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