A large-span continuous steel truss roof structure and construction method thereof

Abstract

The present invention discloses a large-span continuous steel truss roof structure and a construction method thereof, wherein the construction method of the continuous steel truss roof structure comprises: hoisting two truss columns to two longitudinally adjacent support columns respectively by a crane; installing the truss columns without releasing the hook of a main crane; hoisting vertical supports between the truss columns by a secondary crane, installing the vertical supports, and releasing the hook of the main crane after the installation is completed; the present invention changes the construction sequence and installation method, so that the truss can form a stable support by using its own structure, reduces additional fixed facilities, speeds up the construction speed, and improves the construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure construction, in particular to a large-span continuous steel truss roof structure and a construction method thereof. Background Art

[0002] Currently, large-span continuous steel truss roofs are commonly used in large factories, large-span stadiums, and other buildings. For example, a factory building with five horizontal spans is a rectangular structure that is longer vertically and shorter horizontally. During construction, concrete columns are first installed, with the spacing between them set according to the factory building's horizontal span. This means that six columns are used to separate the five spans. Another row of symmetrical concrete columns is set at a certain distance vertically, with steel trusses installed on top of the two rows of columns. Furthermore, multiple rows of columns are installed according to the factory building's longitudinal length, with steel trusses continuously installed on top of each column. These multiple steel trusses together form the complete roof.

[0003] Taking a frame as an example, the steel truss roof includes truss columns set on the columns, vertical supports between longitudinal connections and truss columns, inner span trusses set at the center, outer span trusses set at the edge and steel beams set longitudinally between the trusses.

[0004] During the installation process of the existing technology, the installation is generally carried out row by row longitudinally. First, all the supports on the horizontal row of columns are installed. After the installation is completed, temporary construction measures such as cables and temporary steel braces are set to enhance the stability during the installation process. After that, supports are installed on the adjacent row of columns, and then the support structures on the two rows of columns are connected. This process is then repeated until the entire truss roof is installed.

[0005] However, this installation method requires multiple installation of temporary construction measures such as guy ropes and temporary steel braces, which increases additional workload, increases construction costs, and affects construction efficiency. In areas with smaller construction sites, it is not convenient to install temporary construction measures such as guy ropes and temporary steel braces, which will increase safety hazards during the construction process. Summary of the Invention

[0006] In view of the above-mentioned defects in the prior art, the present invention provides a large-span continuous steel truss roof structure and a construction method thereof, which changes the construction sequence and installation method, so that the truss can form a stable support by using its own structure, reduces additional fixed facilities, and improves construction efficiency.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a long-span continuous steel truss roof structure, comprising: a plurality of identical rows of support columns arranged longitudinally and continuously, with the number of support columns in each row being greater than or equal to two; a steel truss roof arranged on the support columns, the steel truss roof comprising truss columns, vertical supports, span trusses, and steel beams; the truss columns being arranged on top of the support columns, the vertical supports being longitudinally arranged between two adjacent rows of truss columns, the span trusses being transversely arranged between adjacent truss columns in the same row, and the span trusses in the two adjacent rows being connected by a longitudinally arranged steel beam;

[0008] The specific construction method includes the following steps:

[0009] S1: Use a crane to hoist the two truss columns onto two longitudinally adjacent support columns respectively; install the truss columns without releasing the hook of the crane;

[0010] S2: Using a crane to lift the vertical support to the space between the truss columns, and then installing the vertical support. After the installation is completed, the crane is unhooked.

[0011] S3: Repeat steps S1 and S2 until all truss columns and vertical supports on two consecutive rows are installed;

[0012] S4: Using a crane to lift the span truss to a position between adjacent truss columns, and installing the span truss without releasing the hook of the crane;

[0013] S5: Using another crane, hoist the other span truss to between adjacent truss columns in another row, and install the other span truss, without releasing the hook of the other crane;

[0014] S6: Using a crane to hang a steel beam between two adjacent span trusses, and installing the steel beam. After the installation is completed, the crane hooks of the two span trusses are lifted and released;

[0015] S7: Repeat steps S5 and S6 until two consecutive rows of the span trusses and the steel beams are all installed;

[0016] S8: Move the crane to the position of the next row of support columns;

[0017] S9: Using a crane to lift the truss column to the support column of the next row, and installing the truss column, without releasing the hook of the crane; using a crane to lift the vertical support between the truss columns, and installing the vertical support. After the installation is completed, the crane releases the hook;

[0018] S10: Repeat step S9 until all truss columns and vertical supports in a row are installed;

[0019] S11: hoisting the span truss between adjacent truss columns and installing the span truss without releasing the hook of the crane; hoisting the steel beam between the span trusses by the crane and installing the steel beam. After the installation is completed, the crane releases the hook;

[0020] S12: Repeat step S11 until all the span trusses and steel beams in a row are installed;

[0021] S13: Repeat steps S8 to S12 to construct the roof row by row longitudinally until the span trusses and steel beams of the last row are installed.

[0022] With this arrangement, the trusses are connected during the hoisting process of the cranes through the cooperation of multiple cranes, and the support is completed through the original structure of the trusses. For example, after the completion of step S2, a stable structure is formed between the truss columns and the vertical supports. Because the spacing between the support columns in the horizontal direction of the existing conventional roof is large, but the spacing between the support columns in the vertical direction is small, the truss columns adjacent in the vertical direction and the vertical supports connecting the truss columns in step S2 form a short-span portal structure with strong structural stability. It does not require additional support and is sufficient to maintain the existing posture until the entire structure is installed. It does not require the continuous installation of other auxiliary fixing devices during the construction process, which greatly improves the construction speed and solves the problem of the complicated installation of auxiliary fixing structures in the construction of continuous steel truss roof structures in the prior art, and the inability to install auxiliary fixing structures in some narrow spaces. Similarly, in steps S4 to S6, the two longitudinally distributed span trusses and the steel beams connecting the span trusses also form a stable small-span structure.

[0023] In some embodiments of the first aspect, the span truss is configured as a plane truss composed of rods and is assembled on-site. When the factory building has multiple spans in the horizontal direction, it is provided with multiple span trusses, and the span of the span truss is the same as the horizontal span of the factory building.

[0024] With such arrangement, the span truss itself has a stable structure, and a stable plane is formed after arranging the two ends of the span truss on the truss column;

[0025] The construction efficiency is higher if the span trusses with more connecting parts are pre-installed before hoisting.

[0026] In some embodiments of the first aspect, after the truss columns are installed, their positions are corrected to prevent the truss columns from tilting and affecting the installation of subsequent structures.

[0027] In some embodiments of the first aspect, the crane is divided into multiple main cranes and multiple secondary cranes. In steps S1 to S7, the main cranes are distributed on both sides of the two rows of support columns, and the secondary cranes are all located on one side and in the construction direction of the roof. With this arrangement, the crane for lifting small components uses a small secondary crane, reducing construction costs.

[0028] In the steps S8 to S13, the primary crane and the secondary crane are both located in the construction direction of the roof, and the primary crane and the secondary crane are staggered.

[0029] With this setup, when installing the first and second rows of roofs, the main crane hoists two truss columns on either side, and the secondary crane then installs the vertical supports between the truss columns. When installing subsequent roofs, only one truss column needs to be hoisted, so the main crane is always positioned in the direction of the roof construction, resulting in higher construction efficiency.

[0030] Moreover, this crane layout is more conducive to handling roofs with multiple horizontal spans. When hoisting larger trusses, two main cranes are sometimes required to lift them simultaneously. At this time, the adjacent main cranes can be moved a certain distance to cooperate with the other main cranes, which improves construction efficiency.

[0031] In some embodiments of the first aspect, in step S6, the steel beams at the ends of the span truss and the mid-span area of ​​the span truss are installed first. After a stable system is formed, the main crane is unhooked, and then other steel beams are installed by the secondary crane.

[0032] This arrangement saves the use time of the main crane and reduces construction costs.

[0033] Secondly, the present application also provides a construction method for an upper machine room, using the above-mentioned large-span continuous steel truss roof structure construction method. The upper machine room is arranged above the roof. After each row of roof is installed, the construction of the upper machine room of this row is carried out. The first crane is used to lift the machine room steel columns and machine room steel beams. Without loosening the hook of the first crane, the second crane is used to install the steel beams between the machine room steel columns and machine room steel beams and the installed first section of the large-span continuous steel truss steel roof structure.

[0034] Compared with the prior art, the present invention has the following technical effects:

[0035] The present invention rationally utilizes construction machinery and cooperates with each other to carry out large-span steel truss construction, thereby increasing safety during the construction process;

[0036] The present invention rationally utilizes the structural form, so that the installed components form a stable structural system in advance, reduces the use of temporary measures during the construction process, and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention and its features, configurations, and advantages will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not necessarily drawn to scale, emphasis being placed on illustrating the subject matter of the present invention.

[0038] Figure 1 This is an elevation view of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0039] Figure 2 A top view of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0040] Figure 3 A schematic diagram of a large-span continuous steel truss roof structure and the position of the upper machine room hoisting machinery provided in one embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the truss column installation process during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the vertical support installation process during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0043] Figure 6 This is a schematic elevation diagram of the installation process of the inner span trusses during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0044] Figure 7 A schematic plan view of the inner span truss installation process during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0045] Figure 8 This is a schematic elevation diagram of the installation process of the outer span trusses during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0046] Figure 9 A schematic plan view of the installation process of the outer span trusses during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0047] Figure 10 The present invention provides a schematic diagram of a large-span continuous steel truss roof structure and an upper machine room during the construction of the machine room inner steel column installation process.

[0048] Figure 11This is a schematic diagram of the installation process of steel beams at the position of steel columns inside the machine room during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0049] Figure 12 This is a schematic diagram of the installation process of outer steel columns during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0050] Figure 13 This is a schematic diagram of the steel beam installation process at the outer steel column position during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0051] Figure 14 This is a schematic diagram of the installation process of the steel main beam of the machine room during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention;

[0052] Figure 15 The present invention provides a schematic diagram of a steel beam installation process at the position of the main steel beam of the machine room during the construction of a large-span continuous steel truss roof structure and an upper machine room provided in one embodiment of the present invention.

[0053] Description of reference numerals:

[0054] 102, truss column; 105, vertical support; 106, steel beam;

[0055] 103. Inner span truss; 104. Outer span truss;

[0056] 200, upper machine room structure; 201, inner steel columns of the machine room; 202, steel beams of the machine room; 203, outer steel columns of the machine room; 204, steel main beams of the machine room;

[0057] 301, main crane; 302, secondary crane. DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0059] In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "installation", "setting", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Example 1

[0061] See Figures 1 to 9 This embodiment provides a large-span continuous steel truss roof structure and a construction method thereof. The large-span continuous steel truss roof structure includes a plurality of identical rows of support columns arranged longitudinally and continuously, with the number of support columns in each row being greater than or equal to 2; a steel truss roof is arranged on the support columns, and the steel truss roof includes truss columns 102, vertical supports 105, span trusses, and steel beams 106; the truss columns 102 are arranged on top of the support columns, the vertical supports 105 are longitudinally arranged between two adjacent rows of truss columns 102, the span trusses are transversely arranged between adjacent truss columns 102 in the same row, and the span trusses in two adjacent rows are connected by a longitudinally arranged steel beam 106;

[0062] The construction method includes the following steps:

[0063] S1: See Figure 4 , use a crane to hoist the two truss columns 102 onto two longitudinally adjacent support columns respectively; install the truss columns 102 without loosening the hook of the crane;

[0064] S2: See Figure 5 , the vertical support 105 is hoisted between the truss columns 102 by a crane, and the vertical support 105 is installed. After the installation is completed, the crane is unhooked;

[0065] S3: Repeat steps S1 and S2 until all truss columns 102 and vertical supports 105 on two consecutive rows are installed;

[0066] S4: See Figure 6 , the span truss is hoisted to the space between the transversely adjacent truss columns 102 by a crane, and the span truss is installed without releasing the hook of the crane;

[0067] S5: Using another crane, hoist the other span truss to another row of transversely adjacent truss columns 102 to install the other span truss, without releasing the hook of the other crane;

[0068] S6: See Figure 7 , the steel beam 106 is hoisted between two adjacent span trusses by a crane, and the steel beam 106 is installed. After the installation is completed, the crane hooks of the two span trusses are lifted and released;

[0069] S7: See Figures 8-9 , repeat steps S5 and S6 until two consecutive rows of span trusses and steel beams 106 are completely installed;

[0070] S8: Move the crane and hoist to the position of the next row of support columns;

[0071] S9: Use a crane to lift the truss column 102 to the support column of the next row, and install the truss column 102 without releasing the hook of the crane; use the crane to lift the vertical support 105 between the truss columns 102, and install the vertical support 105. After the installation is completed, release the hook of the crane;

[0072] S10: Repeat step S9 until all truss columns 102 and vertical supports 105 in a row are installed;

[0073] S11: The span truss is hoisted between adjacent truss columns 102 to install the span truss, and the crane hook is not released; the steel beam 106 is hoisted between the span trusses by the crane, and the steel beam 106 is installed. After the installation is completed, the crane hook is released;

[0074] S12: Repeat step S11 until all span trusses and steel beams 106 in a row are installed;

[0075] S13: Repeat steps S8 to S12 to construct the roof row by row along the longitudinal direction until the span trusses and steel beams 106 of the last row are installed.

[0076] As a preferred technical solution, the crane can be divided into multiple main cranes 301 and multiple secondary cranes 302, and the lifting capacity of the secondary cranes 302 is smaller than that of the main cranes 301; in steps S1 to S7, the main cranes 301 are distributed on both sides of the two rows of support columns, and the secondary cranes 302 are all located on one side and in the construction direction of the roof; in steps S8 to S13, the main cranes 301 and the secondary cranes 302 are all located in the construction direction of the roof, and the main cranes 301 and the secondary cranes 302 are staggered.

[0077] Specifically, in the prior art, when constructing a continuous steel truss roof, some rods are installed one by one, while others are assembled into small groups and then hoisted onto the roof one by one. However, in the prior art, the lower support is generally installed first, and then the upper support is installed. When installing rods between large spans, it is often necessary to use additional temporary construction measures such as additional guy ropes and temporary steel braces to enhance stability during the installation process. These supports ensure stability during installation, but the installation is complicated, which increases the workload. In some narrow spaces, the support installation is difficult.

[0078] The solution of the present application enables the truss to form a stable structure autonomously without the need for additional support.

[0079] Taking a steel structure factory building with 5 spans in the horizontal direction as an example, the specific construction process of the steel truss roof structure is as follows:

[0080] The span truss is set as a plane truss composed of rods and is assembled on site. When the factory building has multiple spans in the horizontal direction, it has multiple span trusses, and the span of the span truss is the same as the horizontal span of the factory building.

[0081] After the concrete column strength meets the design requirements, the main crane 301 is used to hoist the adjacent truss columns 102 on the same main axis onto the concrete column. Without releasing the hook of the main crane 301, the truss columns 102 are corrected. Then, the secondary crane 302 in the adjacent construction area installs the vertical supports 105 between the truss columns 102. After the truss columns 102 and the vertical supports 105 form a stable structural system, the main crane 301 is released.

[0082] It should be noted that the main axis refers to the longitudinal axis, which is marked as axes 1, 11, 21, 22, 23 and 42 in this embodiment.

[0083] After the truss columns 102 on the main axis are installed, the span trusses of each construction area are assembled on the floor.

[0084] The span trusses include: an inner span truss 103 arranged at the center of the factory building and an outer span truss 104 arranged at both sides of the factory building.

[0085] The first truss in the inner span truss 103 area is hoisted and positioned by the main crane 301 , and the inner span truss 103 is fixed on the truss column 102 , and the main crane 301 of the first truss is not unhooked.

[0086] The main crane 301 near the outer span truss moves to the construction area of ​​the inner span truss 103, and cooperates with the inner span secondary crane 302 to hoist and position the second inner span truss 103 on the adjacent axis in the mid-span area. After the second inner span truss 103 is fixed on the truss column 102, the main crane 301 of the second inner span truss 103 does not loosen the hook.

[0087] At this time, the two adjacent trusses in the construction area of ​​the inner span truss 103 are hoisted into place on the truss column 102, and the two main cranes 301 are not unhooked. The steel beams 106 between the adjacent span trusses are installed by the secondary crane 302 at the inner span position. Preferably, the steel beams 106 at the truss ends and the mid-span area of ​​the truss are installed first, and a stable structural system is formed between the adjacent span trusses. After the connecting welds of the inner span truss 103 and the truss column 102 are completed, the main cranes 301 of the two trusses can be unhooked; after the main crane 301 is unhooked, the inner span secondary crane 302 continues to install the steel beams 106 in the inner span truss 103 area.

[0088] After the installation of the inner span truss 103 is completed, the main crane 301 of the outer span truss 104 returns to the outer span truss 104 area to hoist and position the first outer span truss 104 in the outer span truss area; the outer span truss 104 is fixed on the truss column 102, and the main crane 301 of the first outer span truss 104 is not unhooked.

[0089] The main crane 301 of the inner span truss 103 is moved to the construction area of ​​the outer span truss 104, and cooperates with the outer span secondary crane 302 to lift and position the second outer span truss 104 on the adjacent axis in the mid-span area. After the second outer span truss 104 is fixed on the truss column 102, the main crane 301 of the second outer span truss 104 does not loosen the hook.

[0090] At this time, the two adjacent trusses in the construction area of ​​the outer span truss 104 are hoisted into place on the truss column 102, and the two main cranes 301 have not loosened the hook. The secondary crane 302 installs the steel beams 106 between the adjacent trusses, giving priority to installing the steel beams 106 at the ends and mid-span areas of the outer span truss 104, and using adjacent trusses to form a stable structural system. After the connecting welds of the outer span truss 104 and the truss column 102 are completed, the main cranes 301 of the two trusses can be loosened. After the main crane 301 is loosened, the secondary crane 302 continues to install the steel beams 106 in the area of ​​the inner span truss 103.

[0091] During the subsequent continuous truss hoisting process, the main crane 301 hoists the span truss. Without releasing the hook of the main crane 301, the secondary crane 302 installs the steel beam 106 between the truss and the installed first section of the large-span continuous steel truss steel roof structure.

[0092] When all the steel beams 106 are set, the installation of a row of roof structures is completed.

[0093] After the construction of a row of upper machine room structures is completed, the main crane 301 and the secondary crane 302 in each construction area are moved to their respective construction areas and run to the position of the next row of installation columns to carry out the large-span continuous steel truss steel roof structure of the subsequent axis.

[0094] Example 2

[0095] See also Figures 10-15 The present invention also provides a construction method for an upper machine room, wherein the upper machine room structure is arranged above the roof, and the roof structure is first constructed using the above-mentioned large-span continuous steel truss roof structure construction method. After the installation of the span truss and steel beams is completed, the installation of the upper machine room is started; the first crane is used to lift the machine room steel columns and machine room steel beams, and when the first crane does not release the hook, the second crane is used to install the steel beams between the machine room steel columns and machine room steel beams and the installed first section of the large-span continuous steel truss steel roof structure.

[0096] After the installation of one row of roof structures is completed, the construction of the upper machine room steel structure can be carried out. The construction process of the upper machine room structure is as follows:

[0097] The main crane 301 and the secondary crane 302 in the construction area of ​​the inner span truss 103 respectively hoist the inner steel columns 201 of the machine room of adjacent axes to the truss columns 102. Without loosening the hook of the main crane 301, the inner steel columns 201 of the machine room are corrected, and then the main crane 301 in the adjacent construction area installs the machine room steel beams 202 between the inner steel columns 201 of the machine room. After the machine room steel columns form a stable structural system, the main crane 301 loosens the hook.

[0098] The main crane 301 and the secondary crane 302 in the inner span truss 103 construction area respectively hoist the outer steel columns 203 of the machine room of adjacent axes to the inner span truss 103. Without loosening the hook of the main crane 301, the outer steel columns 203 of the machine room are corrected, and then the main crane 301 in the outer span construction area installs the machine room steel beams 202 between the outer steel columns 203 of the machine room.

[0099] The main crane 301 and the secondary crane 302 in the inner span truss 103 construction area respectively hoist the adjacent machine room steel main beams 204 to the inner steel columns 201 of the machine room. Without loosening the hook of the main crane 301, the main crane 301 in the outer span construction area installs the machine room secondary beams between the portal machine room steel main beams 204. After the machine room steel main beams 204 and the inner steel columns 201 of the machine room form a stable frame structure system, the main crane 301 loosens the hook.

[0100] During the subsequent hoisting of the upper machine room structure, the main crane 301 hoists the steel columns 201 and the steel main beams 204 on the inside of the machine room. Without releasing the hook of the main crane 301, the secondary crane 302 installs the steel columns 201 and the steel main beams 204 on the inside of the machine room and the steel beams 106 between the first section of the installed large-span continuous steel truss steel roof structure until the entire structure is completed.

[0101] Those skilled in the art should understand that they can implement variations by combining the prior art with the above embodiments, which will not be described in detail here. Such variations do not affect the essence of the present invention and will not be described in detail here.

[0102] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A construction method for a large-span continuous steel truss roof structure, characterized in that: The large-span continuous steel truss roof structure includes a plurality of identical rows of support columns that are longitudinally and continuously arranged, and the number of support columns in each row is greater than or equal to 2; the steel truss roof is arranged on the support columns, and the steel truss roof includes truss columns (102), vertical supports (105), span trusses and steel beams (106); the truss columns (102) are arranged on top of the support columns, the vertical supports (105) are longitudinally arranged between two adjacent rows of truss columns (102), the span trusses are transversely arranged between adjacent truss columns (102) in the same row, and the span trusses in two adjacent rows are connected by longitudinally arranged steel beams (106); The construction method comprises the following steps: S1: Using a crane, the two truss columns (102) are respectively hoisted onto two longitudinally adjacent support columns; the truss columns (102) are installed without releasing the hook of the crane; S2: The vertical support (105) is hoisted between the truss columns (102) by a crane to install the vertical support (105). After the installation is completed, the crane is unhooked; S3: Repeat steps S1 and S2 until all the truss columns (102) and the vertical supports (105) on two consecutive rows are installed; S4: Using a crane to lift the span truss to between the transversely adjacent truss columns (102), and installing the span truss, without releasing the hook of the crane; S5: Using another crane, hoist the other span truss to between the transversely adjacent truss columns (102) of another row, and install the other span truss, without releasing the hook of the other crane; S6: Using a crane to hang the steel beam (106) between two adjacent span trusses, and installing the steel beam (106). After the installation is completed, the crane hooks that lift the two span trusses are released; S7: repeating steps S5 and S6 until two consecutive rows of the span trusses and the steel beams (106) are all installed; S8: Move the crane to the position of the next row of support columns; S9: Using a crane to lift the truss column (102) to the support column of the next row, the truss column (102) is installed, and the crane does not release the hook; using a crane to lift the vertical support (105) to the truss column (102), the vertical support (105) is installed, and after the installation is completed, the crane releases the hook; S10: Repeat step S9 until all truss columns (102) and vertical supports (105) in a row are installed; S11: The span truss is hoisted between adjacent truss columns (102) to install the span truss, and the crane does not release the hook; the steel beam (106) is hoisted between the span trusses by the crane, and the steel beam (106) is installed. After the installation is completed, the crane releases the hook; S12: Repeat step S11 until all the span trusses and steel beams (106) in a row are installed; S13: Repeat steps S8 to S12 to construct the steel truss roof row by row along the longitudinal direction until the span trusses and steel beams (106) of the last row are installed.

2. A method for constructing a large-span continuous steel truss roof structure according to claim 1, characterized in that: The span truss is configured as a plane truss composed of rods and is assembled on site. When the plant has multiple spans in the transverse direction, it is provided with multiple span trusses, and the span of the span truss is the same as the transverse span of the plant.

3. The method for constructing a large-span continuous steel truss roof structure according to claim 1, characterized in that: After installing the truss column (102), its position is corrected.

4. The method for constructing a large-span continuous steel truss roof structure according to claim 1, characterized in that: The cranes are divided into a plurality of main cranes and a plurality of secondary cranes, wherein the lifting capacity of the secondary cranes is smaller than that of the main cranes; In steps S1 to S7, the main cranes are distributed on both sides of the two rows of support columns, and the secondary cranes are all located on one side and in the construction direction of the steel truss roof; In the steps S8 to S13, the main crane and the secondary crane are both located in the construction direction of the steel truss roof, and the main crane and the secondary crane are staggered.

5. The method for constructing a large-span continuous steel truss roof structure according to claim 1, characterized in that: In step S6, the steel beams (106) at the ends of the span trusses and the mid-span area of ​​the span trusses are first installed, and after forming a stable system, the crane is unhooked, and then the other steel beams (106) are installed by the crane.

6. A construction method for an upper machine room, wherein the upper machine room structure (200) is arranged above the steel truss roof, characterized in that: A steel truss roof structure is constructed by using a large-span continuous steel truss roof structure construction method according to any one of claims 1 to 5. After the installation of the span truss and the steel beam (106) is completed, the installation of the upper machine room is started; the first crane is used to hoist the machine room steel columns and the machine room steel beams. When the first crane does not release the hook, the second crane is used to install the steel beams between the machine room steel columns and the machine room steel beams and the installed first section of the large-span continuous steel truss roof structure.

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