Large-span continuous steel truss roof structure and construction method thereof

Abstract

The invention discloses a large-span continuous steel truss roof structure and a construction method thereof. The construction method of the continuous steel truss roof structure comprises the steps that two truss columns are hoisted to two longitudinally adjacent supporting columns through a crane; the truss column is installed, and a main crane does not loosen; the vertical support is hoisted to the position between the truss columns through the secondary crane, the vertical support is installed, and after installation is completed, the main crane loosens a hook; the construction sequence and the installation mode are changed, the truss can form stable supporting through the structure of the truss, additional fixing facilities are reduced, the construction speed is increased, and the construction efficiency is improved.

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] At present, large-span continuous steel truss roofs are often used in large factories, large-span stadiums and other buildings. Take a factory with 5 spans in the horizontal direction as an example. The factory is rectangular and longer in the vertical direction and shorter in the horizontal direction. In the specific construction process, concrete columns are set first. The spacing of the concrete columns is set according to the horizontal span of the factory, that is, 6 columns are used to separate 5 spans. Another row of symmetrical concrete columns is set at a certain distance in the vertical direction, and the steel trusses are installed on the top of the two rows of columns; in addition, according to the longitudinal length of the factory, multiple rows of columns are set, and steel trusses are continuously installed on the top of the columns. Multiple steel trusses together form a complete roof.

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

[0004] During the installation process of the prior art, the installation is generally carried out row by row longitudinally. All supports on a horizontal row of columns are installed first. 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 an adjacent row of columns, and then the support structures on the two rows of columns are connected. This process is then repeated until all trussed roofs are installed.

[0005] However, this installation method requires the multiple installation of temporary construction measures such as guy ropes and temporary steel braces, which adds extra 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-mentioned purpose, in a first aspect, the present invention provides a large-span continuous steel truss roof structure, comprising: a plurality of identical rows of support columns arranged longitudinally and continuously, 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 comprises truss columns, vertical supports, span trusses and steel beams; the truss columns are arranged on the tops of the support columns, the vertical supports are longitudinally arranged between truss columns of two adjacent rows, the span trusses are transversely arranged between adjacent truss columns of the same row, and the span trusses of the two adjacent rows are connected by longitudinally arranged steel beams;

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

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

[0010] S2: The vertical support is hoisted between the truss columns by a crane to install the vertical support. After the installation is completed, the crane is unhooked;

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

[0012] S4: hoisting the span truss to between the transversely adjacent truss columns by a crane, and installing the span truss without releasing the hook of the crane;

[0013] S5: hoisting another span truss to another row of transversely adjacent truss columns by another crane, installing another span truss, and the hook of the other crane is not released;

[0014] S6: hoisting the steel beam between two adjacent span trusses by means of a crane, and installing the steel beam. After the installation is completed, the crane that hoists the two span trusses releases the hook;

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

[0016] S8: moving the crane and the hoist 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, installing the truss column, and the crane does not release the hook; using a crane to lift the vertical support between the truss columns, installing the vertical support (105), and after the installation is completed, the crane releases the hook;

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

[0019] S11: hoisting the span truss between adjacent truss columns, installing the span truss, and not releasing the hook of the crane; hoisting the steel beam between the span trusses by the crane, and installing the steel beam, and after the installation is completed, releasing the hook of the crane;

[0020] S12: Repeat step S10 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 such 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, therefore, the truss columns adjacent in the vertical direction in step S2 and the vertical supports connecting the truss columns constitute a short-span portal structure with strong structural stability, and no additional support is required, which is sufficient to maintain the existing posture until the entire structure is installed; there is no need to continuously install other auxiliary fixing devices during the construction process, which greatly improves the construction speed and solves the problem in the prior art that the auxiliary fixing structure is complicated to install in the construction of the continuous steel truss roof structure, and the auxiliary fixing structure cannot be installed 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 constitute 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] In this way, the span truss itself has a stable structure, and a stable plane is formed after the two ends of the span truss are arranged 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 column (102) is installed, its position is corrected to prevent the truss column 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 to reduce construction costs.

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

[0029] With this arrangement, when installing the first and second rows of roofs, the main crane hoists two truss columns on both sides, and then the secondary crane installs the vertical supports between the truss columns; when installing the subsequent roofs, only one truss column needs to be hoisted, so the main crane is all located in the construction direction of the roof, which increases the 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 needed to lift them at the same time. At this time, the adjacent main cranes can be moved a certain distance to cooperate with other main cranes, which improves construction efficiency.

[0031] In some embodiments of the first aspect, in step S6, the steel beams (106) at the ends of the span truss and the mid-span area of ​​the span truss are installed preferentially, and after a stable system is formed, the main crane is unhooked, and then other steel beams (106) are installed by the secondary crane.

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

[0033] On the second aspect, 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, and after each row of roof is installed, the construction of the upper machine room of this row is carried out.

[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 the safety during the construction process;

[0036] The present invention reasonably 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 the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0038] Figure 1 A plan view and 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 A schematic diagram of the installation process of truss 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;

[0042] Figure 5 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 A schematic diagram of the installation process of 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 diagram of the installation process of the outer span truss 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 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;

[0046] Fig. 9 A schematic diagram of a steel beam 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;

[0047] Fig.10 The present invention is a schematic diagram of the installation process of steel columns inside a 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.

[0048] Fig.11A schematic diagram of the installation process of a machine room steel beam 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] Fig.12 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] Fig.13 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] Fig.14 A schematic diagram of the installation process of a steel main beam of a 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] Fig.15 The present invention is a schematic diagram of a large-span continuous steel truss roof structure and a machine room steel beam installation process during the construction of 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 column of machine room; 202, steel beam of machine room; 203, outer steel column of machine room; 204, steel main beam of machine room

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

[0058] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Example 1

[0061] See also Figures 1 to 9 The present embodiment provides a long-span continuous steel truss roof structure and a construction method thereof, wherein the long-span continuous steel truss roof structure comprises a plurality of identical rows of support columns which are arranged in a longitudinal continuous manner, wherein 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 comprises truss columns 102, vertical supports 105, span trusses and steel beams 106; the truss columns 102 are arranged on the tops of the support columns, the vertical supports 105 are arranged longitudinally between the truss columns 102 of two adjacent rows, the span trusses are arranged transversely between the adjacent truss columns 102 of the same row, and the span trusses of two adjacent rows are connected by the longitudinally arranged steel beams 106;

[0062] The construction method includes the following steps:

[0063] S1: See Figure 4 , use a crane to respectively hoist the two truss columns 102 to two longitudinally adjacent support columns; 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 to hoist another span truss to another row of transversely adjacent truss columns 102, and installing another span truss, while the hook of the other crane is not released;

[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 that hoists the two span trusses is unhooked;

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

[0070] S8: moving the crane and the 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, and the crane does not release the hook; use a 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 the 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;

[0074] S12: Repeat step S10 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 and multiple secondary cranes, and 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 roof; in steps S8 to S13, the main crane and the secondary crane are all located in the construction direction of the roof, and the main crane and the secondary crane are staggered.

[0077] Specifically, in the prior art, when constructing a continuous steel truss roof, some will install the rods one by one, and some will assemble the rods into small groups, and then hoist them 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 the stability during the installation process. These supports ensure stability during installation, but the settings are complicated, which increases additional workload. In some narrow spaces, the support installation is difficult.

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

[0079] Taking a steel structure factory building with 5 spans horizontally 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 strength of the concrete column meets the design requirements, the adjacent truss columns 102 on the same main axis are hoisted onto the concrete column by the main crane 301. Without releasing the hook of the main crane 301, the truss columns 102 are corrected, and 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 axis 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 put into position 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 of 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 in place on the truss columns 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 welding of the connecting welds between the inner span truss 103 and the truss columns 102 is 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 to the truss column 102, and the main crane 301 of the first outer span truss 104 does not loosen the hook.

[0089] The main crane 301 of the inner span truss 103 moves to the construction area of ​​the outer span truss 104, and cooperates with the outer span secondary crane 302 to hoist and position the second outer span truss 104 of 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 are not unhooked. The secondary crane 302 installs the steel beams 106 between the adjacent trusses, and gives priority to installing the steel beams 106 at the ends and mid-span areas of the outer span truss 104. Adjacent trusses are used to form a stable structural system. After the welding of the connecting welds between the outer span truss 104 and the truss columns 102 is completed, the main cranes 301 of the two trusses can be unhooked. After the main crane 301 is unhooked, the secondary crane 302 continues to install the steel beams 106 in the inner span truss 103 area.

[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 the upper machine room structure of a row 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 to 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 by using the above-mentioned large-span continuous steel truss roof structure construction method. After the installation of the span truss and steel beam is completed, the installation of the upper machine room is started; the first crane is used to hoist the machine room steel columns and machine room steel beams, and when the first crane is not loosened, 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 a row of roof structures are installed, the upper machine room steel structure can be constructed. 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. 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 steel columns of the machine room 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 releasing 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 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 releases 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 loosening 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 installed first section of large-span continuous steel truss steel roof structure until the overall structure is completed.

[0101] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content 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-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 without departing 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 large-span continuous steel truss roof structure, characterized in that: The invention comprises: a plurality of identical rows of support columns which are arranged in a longitudinal continuous manner, wherein the number of support columns in each row is greater than or equal to 2; a steel truss roof is arranged on the support columns, and the steel truss roof comprises truss columns (102), vertical supports (105), span trusses and steel beams (106); the truss columns (102) are arranged on the tops of the support columns, the vertical supports (105) are arranged longitudinally between truss columns (102) of two adjacent rows, the span trusses are arranged transversely between adjacent truss columns (102) of the same row, and the span trusses of the two adjacent rows are connected by a longitudinally arranged steel beam (106).

2. A large-span continuous steel truss roof structure according to claim 1, characterized in that: The following steps are involved: 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 the crane loosening its hook; 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: repeating 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 hoist the span truss between transversely adjacent truss columns (102) to install the span truss, without releasing the hook of the crane; S5: using another crane to hoist another span truss to another row of transversely adjacent truss columns (102), and installing another span truss, while the other crane does not release the hook; 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 that hangs the two span trusses releases the hook; S7: repeating steps S5 and S6 until two consecutive rows of the span trusses and the steel beams (106) are completely 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, installing the truss column (102), and the crane does not release the hook; using a crane to lift the vertical support (105) between the truss columns (102), installing the vertical support (105), 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: hoisting the span truss between adjacent truss columns (102) to install the span truss without releasing the hook of the crane; hoisting the steel beam (106) between the span trusses by the crane and installing the steel beam (106); after the installation is completed, releasing the hook of the crane; S12: repeating step S10 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.

3. A method for constructing a large-span continuous steel truss roof structure according to claim 2, 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 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 plant.

4. A method for constructing a large-span continuous steel truss roof structure according to claim 2, characterized in that: After installing the truss column (102), calibrate its position.

5. The method for constructing a large-span continuous steel truss roof structure according to claim 2, 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 the 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; In the steps S8 to S13, the main crane and the secondary crane are both located in the construction direction of the roof, and the main crane and the secondary crane are staggered.

6. The method for constructing a large-span continuous steel truss roof structure according to claim 2, 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 a stable system is formed, the crane is unhooked, and then other steel beams (106) are installed by the crane.

7. A construction method for an upper machine room, wherein the upper machine room structure (200) is arranged above the roof, characterized in that: A roof structure is constructed by using a large-span continuous steel truss roof structure construction method as described in any one of claims 2 to 6. After the span truss and steel beam (106) are installed, the installation of the upper machine room is started; a first crane is used to hoist the machine room steel columns and machine room steel beams. Without loosening the hook of the first crane, a 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.

Images