Staggered stacking method for trussed girder sections

Abstract

The invention discloses a staggered stacking method for trussed girder sections, and belongs to the technical field of bridge construction. According to the staggered stacking method for the trussed girder segments, the trussed girder segments comprise pull rods, upper-layer segments and lower-layer segments, and the upper-layer segments are located above the lower-layer segments and fixedly connected with the lower-layer segments; the pull rod is arranged between the upper-layer section and the lower-layer section and is fixedly connected to the upper-layer section and the lower-layer section; the stacking method comprises the steps that the pull rod is divided into a pull rod upper section and a pull rod lower section, and the pull rod upper section and the pull rod lower section are detachably connected; a bracket for supporting the upper-layer section is arranged on the lower-layer section; stress is applied to the upper-layer section through hoisting equipment, so that the trussed beam section is in a balanced state; the upper-layer segment and the lower-layer segment are separated, and the pull rod upper segment and the pull rod lower segment are separated, so that the upper-layer segment is in an unconstrained state; and the upper-layer segment is hoisted, so that the upper-layer segment and the lower-layer segment are staggered, and the upper-layer segment is placed on the support.

Description

Technical Field

[0001] The present application belongs to the technical field of bridge construction, and in particular relates to a method for staggered stacking of truss beam segments. Background Art

[0002] The main bridge of the west branch of a certain place is a box-truss composite structure with strong box and weak truss, two main trusses, "N"-shaped trusses, truss spacing of 16m, main truss transverse spacing of 14.9m, truss height of 13.2m; the total width of the upper deck is 33.5m, the total width of the lower deck is 39.0m (including the wind nozzle 41.8m), and a 2% "human" shaped transverse slope is set in the transverse direction of the bridge. The upper highway bridge deck adopts an orthogonal anisotropic steel bridge deck structure with a dense beam system; the lower highway and railway flat deck adopts an integral steel box structure.

[0003] The steel trusses of one section of the main bridge have a total of 22 segments, which are designed to be manufactured and shipped as a whole.

[0004] When the segments were manufactured and ready to be transported to the construction site, it was found that the water level had risen. The overall manufacturing and overall shipping design caused the segments to be unable to pass through certain bridge holes during transportation, making it impossible to transport the segments from the manufacturing site to the construction site. In order to ensure the construction progress and ensure that the main bridge is completed within the expected time limit, how to ensure that the processed segments can be smoothly transported from the manufacturing site to the construction site is a technical problem that urgently needs to be solved. Summary of the invention

[0005] The present application aims to at least to some extent solve the technical problem that the processed truss segments cannot pass through certain bridge holes during transportation. To this end, the present application provides a method for staggered stacking of truss segments.

[0006] The present application provides a method for staggered stacking of truss segments, wherein the truss segments include a tie rod, an upper segment and a lower segment, wherein the upper segment is located above the lower segment and is fixedly connected to the lower segment; the tie rod is disposed between the upper segment and the lower segment and is fixedly connected to the upper segment and the lower segment; the stacking method includes:

[0007] The pull rod is divided into an upper pull rod section and a lower pull rod section, and the upper pull rod section and the lower pull rod section are detachably connected;

[0008] A bracket for supporting the upper segment is provided on the lower segment;

[0009] Applying force to the upper segment by means of a lifting device so that the truss segment is in a balanced state;

[0010] Separating the upper segment from the lower segment, and separating the upper segment of the tie rod from the lower segment of the tie rod, so that the upper segment is in an unconstrained state;

[0011] The upper segment is hoisted to displace the upper segment and the lower segment, and the upper segment is placed on the bracket.

[0012] In some embodiments, the step of dividing the pull rod into an upper pull rod section and a lower pull rod section, and making the upper pull rod section and the lower pull rod section detachably connected, comprises:

[0013] A code plate is welded to the part of the pull rod that needs to be divided, wherein the code plate has an avoidance notch, and the avoidance notch faces the pull rod;

[0014] Cutting the tie rod in the avoidance notch to obtain the tie rod upper section and the tie rod lower section, and ensuring that the distance between the tie rod upper section and the tie rod lower section can accommodate two flanges;

[0015] The flanges are welded to the upper section of the pull rod and the lower section of the pull rod respectively, and the two flanges are connected by a connecting piece.

[0016] In some embodiments, before welding the code plates to the parts of the pull rods that need to be cut, the stacking method further includes: marking cutting lines on the pull rods.

[0017] In some embodiments, the truss segment includes a plurality of the tie rods, and the plurality of the tie rods are sequentially divided into the tie rod upper section and the tie rod lower section, and the tie rod upper section and the tie rod lower section are detachably connected.

[0018] In some embodiments, the upper segment straight web of the upper segment and the lower segment straight web of the lower segment are fixedly connected; the separation of the upper segment and the lower segment, and the separation of the upper section of the tie rod and the lower section of the tie rod, so that the upper segment is in an unconstrained state, comprises:

[0019] Disassembling the connecting piece connecting the upper segment straight web bar and the lower segment straight web bar;

[0020] The connector connecting the flange on the upper section of the pull rod and the flange on the lower section of the pull rod is disassembled, and the code plate is cut.

[0021] In some embodiments, after lifting the upper segment, displacing the upper segment and the lower segment, and placing the upper segment on the bracket, the stacking method further includes:

[0022] Fixing a retaining pile on the support, and ensuring that there is a distance between the retaining pile and the upper segment along the length direction;

[0023] The sleepers are inserted within the said spacing.

[0024] In some embodiments, before applying force to the upper segment by lifting equipment to put the upper segment in a balanced state, the stacking method also includes: using a modular vehicle to transport the truss segment to a factory; and lifting the upper segment by a crane in the factory.

[0025] In some embodiments, the upper segment is hoisted by two cranes in parallel.

[0026] In some embodiments, the staggering of the upper segment and the lower segment comprises: moving the upper segment along the length direction so that the upper segment and the lower segment are staggered by a set distance in the length direction; moving the upper segment along the width direction so that the upper segment and the lower segment are staggered by a set distance in the width direction.

[0027] In some embodiments, before applying force to the upper segment by lifting equipment to put the upper segment in a balanced state, the stacking method further includes: reviewing the lifting center of gravity of the upper segment and calculating the force on the lifting lug.

[0028] The present invention has at least the following beneficial effects:

[0029] The present invention first cuts the tie rod to divide it into two sections, upper and lower, and connects them detachably, which facilitates the disconnection of the upper section and the lower section of the tie rod when the upper and lower sections are separated later. It also facilitates the connection of the upper section and the lower section of the tie rod after the truss section is transported to the construction site, which facilitates the restoration of the truss section. A bracket is set on the lower section, and the upper section is hoisted, so that the upper section is displaced and placed on the bracket, so that the upper section and the lower section have overlapping areas in the height direction, thereby reducing the total height of the truss section, so that the truss section can pass through certain bridge holes during transportation. The bracket supports the displaced upper section, so that the upper section will not fall over after being displaced, ensuring stability during subsequent transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A flow chart of a method for staggered stacking of truss segments in one or more embodiments of the present application is shown.

[0032] Figure 2 A front view of a truss segment with a bracket disposed on it and a module vehicle disposed below it in one or more embodiments of the present application is shown.

[0033] Figure 3 A right side view of a truss segment in one or more embodiments of the present application is shown.

[0034] Figure 4 A right side view of a truss segment in some other embodiments of the present application is shown.

[0035] Figure 5 A schematic diagram of the installation of a yard plate and a flange in a method for staggered stacking of truss segments in one or more embodiments of the present application is shown.

[0036] Figure 6 A schematic structural diagram of a stacking plate in a method for staggered stacking of truss segments in one or more embodiments of the present application is shown.

[0037] Figure 7 A schematic diagram of an upper segment of a truss segment and an upper segment of a tie rod in one or more embodiments of the present application is shown.

[0038] Figure 8 A top view of a truss segment after the upper segment and the lower segment are staggered in the truss segment staggered stacking method in one or more embodiments of the present application is shown.

[0039] Fig. 9 A schematic diagram showing the truss segments after staggered stacking is shown.

[0040] Fig.10 A schematic diagram showing the fixing of the retaining piles on the support and the insertion of the sleepers is shown.

[0041] Figure markings: 100-truss segment, 110-tension rod, 111-upper segment of tension rod, 112-lower segment of tension rod, 120-upper segment, 121-upper segment block, 122-upper segment connecting assembly, 1221-upper segment straight web member, 1222-upper segment diagonal web member, 130-lower segment, 131-lower segment block, 132-lower segment connecting assembly, 1321-lower segment straight web member, 1322-lower segment diagonal web member, 140-code plate, 140a-avoidance gap, 150-flange, 160-bracket, 170-stop pile, 180-sleeper, 190-lifting ear. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0043] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The steel trusses of a certain section of a main bridge had a total of 22 truss segments, which were designed to be manufactured and shipped as a whole. When the segments were manufactured and ready to be transported to the construction site, it was found that the water level had risen. The design of overall manufacturing and overall shipping resulted in the segments being too high to pass through certain bridge tunnels during transportation, making it impossible to transport the segments from the manufacturing site to the construction site.

[0047] Therefore, in the related art, there is a technical problem that the processed truss segments cannot pass through certain bridge tunnels during transportation. The embodiment of the present application provides a method for staggered stacking of truss segments, which can at least solve the technical problem that the processed truss segments cannot pass through certain bridge tunnels during transportation to a certain extent.

[0048] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0049] like Figure 2 and Figure 3 As shown, the truss segment 100 includes a tie rod 110, an upper segment 120 and a lower segment 130, wherein the upper segment 120 is located above the lower segment 130 and is fixedly connected to the lower segment 130; the tie rod 110 is disposed between the upper segment 120 and the lower segment 130 and is fixedly connected to the upper segment 120 and the lower segment 130.

[0050] The upper segment 120 is located above the lower segment 130, and the lower segment 130 supports the upper segment 120. The upper surface of the upper segment 120 is called the upper bridge deck, which can be used for vehicles to pass. The upper surface of the lower segment 130 is called the lower bridge deck, which can also be used for vehicles to pass. The pull rod 110 is arranged between the upper segment 120 and the lower segment 130, and its upper end is fixedly connected to the upper segment 120, and its lower end is fixedly connected to the lower segment 130. When the segments are transported, it can support the upper segment 120, increase the connection strength between the upper segment 120 and the lower segment 130, and avoid the upper segment 120 and the lower segment 130 from being misaligned and offset during transportation. When the segments are transported to the site for installation, when the upper segment 120 is hoisted to install the truss segment 100, the tie rod 110 can apply tension to the lower segment 130 to prevent the lower segment 130 from being separated from the upper segment 120 during the hoisting process. After the bridge is built, the tie rod 110 can be removed from the upper segment 120 and the lower segment 130.

[0051] A complete steel beam is usually formed by splicing a plurality of truss beam segments 100 connected in sequence. The structures of the truss beam segments 100 may be the same or different, which is not limited in the present application.

[0052] The structures of the upper segment 120 and the lower segment 130 are various and are not limited in the present application.

[0053] like Figure 3As shown, in some embodiments, the upper segment 120 includes an upper segment block 121 and two upper segment connection components 122 spaced apart along the width direction of the upper segment block 121, and the upper segment connection component 122 includes an upper segment straight web member 1221 and an upper segment diagonal web member 1222. The upper segment straight web member 1221 and the upper segment diagonal web member 1222 are both located below the upper segment block 121 and fixedly connected to the upper segment block 121. The upper segment straight web member 1221 is vertically arranged, and the upper segment diagonal web member 1222 is arranged at an acute angle to the upper segment straight web member 1221. The lower segment 130 includes a lower segment block 131 and two lower segment connection assemblies 132 arranged at intervals along the width direction of the lower segment block 131, and the lower segment connection assembly 132 includes a lower segment straight web member 1321 and a lower segment diagonal web member 1322. The lower segment straight web member 1321 and the lower segment diagonal web member 1322 are both located above the lower segment block 131 and fixedly connected to the lower segment block 131. The lower segment straight web member 1321 is vertically arranged, and the lower segment diagonal web member 1322 is arranged at an acute angle to the lower segment straight web member 1321. The upper segment straight web member 1221 is located above the lower segment straight web member 1321 and fixedly connected to the lower segment straight web member 1321. It should be noted that after multiple truss segments 100 are spliced ​​together, the upper segment diagonal web member 1222 of the previous truss segment 100 will be fixedly connected to the lower segment diagonal web member 1322 of the next truss segment 100. The specific connection method is known to those skilled in the art and will not be elaborated here.

[0054] It should be noted that the tie rod 110 is located between the upper segment block 121 and the lower segment block 131 , connecting the upper segment block 121 and the lower segment block 131 .

[0055] like Figure 4As shown, in some embodiments, the upper segment 120 includes an upper segment block 121 and two upper segment connection components 122 spaced apart along the width direction of the upper segment block 121, and the upper segment connection component 122 includes an upper segment straight web member 1221 and two upper segment diagonal web members 1222. Along the length direction of the upper segment 120, the two upper segment diagonal web members 1222 are respectively located on both sides of the upper segment straight web member 1221. The upper segment straight web member 1221 and the upper segment diagonal web member 1222 are both located below the upper segment block 121 and fixedly connected to the upper segment block 121. The upper segment straight web member 1221 is vertically arranged, the upper segment diagonal web member 1222 is arranged at an acute angle with the upper segment straight web member 1221, and the two upper segment diagonal web members 1222 are symmetrically arranged along the upper segment straight web member 1221. In these embodiments, the lower segment 130 includes a lower segment block 131 and two lower segment straight web members 1321, and the lower segment straight web members 1321 are vertically arranged. The two lower segment straight web members 1321 are spaced apart along the width direction of the lower segment block 131. The upper segment straight web member 1221 is located above the lower segment straight web member 1321 and is fixedly connected to the lower segment straight web member 1321. It should be noted that after the multiple truss segments 100 are spliced ​​together, the upper segment diagonal web members 1222 of the truss segment 100 of this embodiment will be fixedly connected to the lower segment diagonal web members 1322 of the truss segment 100 located on the front and rear sides thereof. The specific connection method is known to those skilled in the art and will not be elaborated here.

[0056] The truss segments 100 provided in the above two embodiments can be stacked by the truss segment staggered stacking method provided by the present invention. Figure 1 As shown, the method for staggered stacking of truss beam segments includes steps S100, S200, S300, S400, S500, S600, S700 and S800:

[0057] S100, such as Figure 2 and Figure 3 As shown, the pull rod 110 is divided into a pull rod upper section 111 and a pull rod lower section 112, and the pull rod upper section 111 and the pull rod lower section 112 are detachably connected.

[0058] The tie rod 110 is cut from the middle to form an upper and lower section, the upper section is the tie rod upper section 111, and the lower section is the tie rod lower section 112. After the tie rod 110 is cut, the tie rod upper section 111 and the tie rod upper section 111 need to be detachably connected together to ensure the connection strength between the upper segment 120 and the lower segment 130, and avoid the upper segment 120 and the lower segment 130 from being misaligned and offset in the subsequent process. The purpose of this step is to separate the tie rod 110 into two sections, so that the upper segment 120 and the lower segment 130 can be separated when the upper segment 120 is subsequently hoisted.

[0059] Please combine Figure 5 and Figure 6 As shown, step S100 may include steps S110, S120, S130, and S140.

[0060] Step S110, marking a cutting line on the pull rod 110. With this design, when welding the code plate 140 in step S120, the avoidance notch 140a of the code plate 140 can be aligned with the cutting line, so that the operator can quickly weld the code plate 140 to the pull rod 110. When cutting in step S130, the cutting can also be performed with reference to the cutting line, which helps to ensure cutting accuracy and improve cutting efficiency.

[0061] S120 , welding a code plate 140 to the portion of the tie rod 110 that needs to be segmented, wherein the code plate 140 has an avoidance notch 140 a , and the avoidance notch 140 a faces the tie rod 110 .

[0062] Before the tie rod 110 is cut, multiple code plates 140 are welded in advance at intervals around the circumference of the tie rod 110 at the cutting part to ensure that the upper section 111 and the lower section 112 of the tie rod formed after cutting are fixedly connected by multiple code plates 140, and the lower section 112 of the tie rod can support the upper section 111 of the tie rod, thereby supporting the upper segment 120. After the tie rod 110 is cut, the truss segment 100 is still in a state of force balance, and the truss segment 100 is prevented from tipping over due to unbalanced force after cutting. The code plate 140 has an avoidance notch 140a. When welding the code plate 140, it is necessary to ensure that the avoidance notch 140a is aligned with the part to be cut later. The avoidance notch 140a can avoid the cutting tool, which is convenient for subsequent cutting.

[0063] S130 , cutting the tie rod 110 in the avoidance notch 140 a to obtain an upper tie rod section 111 and a lower tie rod section 112 , and ensuring that the distance between the upper tie rod section 111 and the lower tie rod section 112 can accommodate two flanges 150 .

[0064] After the code plate 140 is welded, it can be cut with reference to the cutting line to obtain the upper section 111 and the lower section 112 of the pull rod. After cutting, there is a certain distance between the upper section 111 and the lower section 112 of the pull rod, and the distance can avoid the flange 150.

[0065] S140, welding flanges 150 to the pull rod upper section 111 and the pull rod lower section 112 respectively, and connecting the two flanges 150 via a connecting piece.

[0066] A flange 150 is welded at the lower end of the upper section 111 of the tie rod, and a flange 150 is welded at the upper end of the lower section 112 of the tie rod. After the flange 150 is welded, the two flanges 150 are fixedly connected together by bolts and other connecting parts. Through the design of the flange 150, when the truss segment 100 is subsequently disassembled or restored, the connecting parts on the flange 150 can be installed or removed, so that the subsequent work can be carried out and the force strength of the segment can be guaranteed.

[0067] By first setting the code plate 140, then cutting the pull rod 110, and then setting the flange 150, and finally connecting the two flanges 150 with a connecting piece, the conversion of the force system of the truss segment 100 is completed without the need for lifting equipment, which greatly saves the stacking cost, and allows step S100 to be completed outside the factory, reducing the occupation of the limited space of the factory.

[0068] The truss segment 100 is usually provided with a plurality of tie rods 110. When the truss segment 100 has a plurality of tie rods 110, the plurality of tie rods 110 are sequentially divided into an upper tie rod section 111 and a lower tie rod section 112, and the upper tie rod section 111 and the lower tie rod section 112 are detachably connected. That is, step S100 is sequentially performed on each tie rod 110, and only one tie rod 110 is processed at a time. After the flange 150 of the tie rod 110 is welded and the connector is installed, other tie rods 110 can be processed, so as to avoid the upper segment 120 from being unstable and collapsed due to the simultaneous step S100 of multiple tie rods 110.

[0069] In some implementations, grooves are formed on the upper section 111 and the lower section 112 of the pull rod, and a full penetration weld is welded between the flange 150 and the upper section 111 of the pull rod, and more than 80% of the full penetration is ensured. A full penetration weld is also welded between the flange 150 and the lower section 112 of the pull rod, and more than 80% of the full penetration is ensured.

[0070] S200, a support 160 for supporting the upper segment 120 is provided on the lower segment 130, such as Figure 2 shown.

[0071] The bracket 160 is used to support the upper segment 120, and its structural strength should meet the design requirements. Its structure is diverse and is not limited in this application. Specifically, the bracket 160 is arranged on the lower segment block 131 of the lower segment 130, and the bracket 160 supports the upper segment block 121 of the upper segment 120. The bracket 160 can be placed directly on the lower segment 130 without being connected to the lower segment 130. The bracket 160 can also be fixed on the lower segment 130 to avoid displacement of the bracket 160 during subsequent lifting. In order to ensure the supporting effect, multiple brackets 160 need to be set, and multiple brackets 160 jointly support the upper segment 120. It should be noted that the height of the bracket 160 should be lower than the height of the tie rod 110, and it should be ensured that after the upper segment 120 is stacked, the upper segment 111 of the tie rod will not press against the lower segment block 131, and the lower segment 112 of the tie rod will not press against the upper segment block 121.

[0072] In some embodiments, four brackets 160 are provided, the brackets 160 are fixed on the lower segment block 131, and the four brackets 160 are arranged in an array and are all located between two lower segment connection components 132. Figure 8 shown.

[0073] In some embodiments, the upper segment 120 has a weight of about 350 t. In these embodiments, four brackets 160 are provided, and a single bracket 160 meets the bearing capacity requirement of 100 t. It should be noted that when arranging multiple brackets 160, they need to be arranged according to the change in the center of gravity of the upper segment 120 after misalignment, so as to ensure that the upper segment 120 is balanced in force after misalignment and stacking.

[0074] S300, rechecking the center of gravity of the upper segment 120, and calculating the force on the lifting lug 190.

[0075] It should be noted that the upper segment 120 of the truss segment 100 is provided with a lifting lug 190 for lifting. Figure 3As shown, when the truss segment 100 is transported to the construction site, the lifting equipment can directly lift the truss segment 100 as a whole through these lifting ears 190, and place it at a designated position, so that multiple truss segments 100 can be assembled into a bridge. When lifting the upper segment 120, this stacking method continues to use these lifting ears 190. It is easy to understand that the center of gravity of lifting the upper segment 120 alone and lifting the truss segment 100 as a whole through these lifting ears 190 is different, and the force required to be applied by each lifting ear 190 is also different. Therefore, before lifting the upper segment 120, it is necessary to review the lifting center of gravity, and calculate the force and eccentricity of each lifting ear 190, so as to select appropriate lifting equipment, etc., to ensure that there will be no lifting failure accidents such as the upper segment 120 tipping over during the lifting process. It should be noted that methods for checking the lifting center, calculating the force of the lifting eye 190 and calculating the eccentric load are well known to those skilled in the art and will not be elaborated here.

[0076] S400, transport the truss segment 100 to the factory building by using a modular vehicle; and lift the upper segment 120 by using a crane in the factory building. The upper segment 120 is lifted by the crane in the factory building, without renting lifting equipment outside the factory building, thereby saving construction costs.

[0077] In some embodiments, two cranes are used to hoist the upper segment 120. In these embodiments, there are four lifting lugs 190 on the upper segment 120, and the four lifting lugs 190 are arranged in an array. The crane has a main hook and an auxiliary hook. The two cranes have two main hooks and two auxiliary hooks. The four hooks are hung on the four lifting lugs 190 respectively, and the two main hooks and the two auxiliary hooks are located on the same side. The four hooks simultaneously apply force to the upper segment 120 to lift the upper segment 120, thereby ensuring the safety of the hoisting.

[0078] S500, applying force to the upper segment 120 by means of a hoisting device to put the truss segment 100 in a balanced state;

[0079] After transporting the truss segment 100 to the factory and ensuring the safety of the lifting, hang the crane hook on the lifting lug 190, and then load the main hook and auxiliary hook of the crane with 100% force to make the truss segment 100 in a balanced state, thereby reducing the influence of the lateral force generated by the off-load of the truss segment 100 on the removal of fasteners such as rivets and bolts, and facilitating the subsequent removal of fasteners such as rivets and bolts.

[0080] The modular vehicle should be arranged according to the maximum weight of the truss segment 100, and the loading rate of the modular vehicle should be less than 70% to meet the safety transportation requirements. In some embodiments, two 16-axle 48-ton modular vehicles are selected to transport the truss segment 100.

[0081] S600 , separating the upper segment 120 and the lower segment 130 , and separating the upper pull rod segment 111 and the lower pull rod segment 112 , so that the upper segment 120 is in an unconstrained state.

[0082] Remove the connecting pieces connecting the upper segment 120 and the lower segment 130 so that the upper segment 120 and the lower segment 130 are no longer connected, and remove the connecting pieces connecting the upper segment 111 and the lower segment 112 of the pull rod so that the upper segment 111 and the lower segment 112 are no longer connected, thereby placing the upper segment 120 in an unconstrained state to ensure that the lower segment 130 will not be driven along when the upper segment 120 is lifted.

[0083] Step S600 may include S610 and S620.

[0084] S610 , disassembling the connection piece connecting the upper segment 120 and the lower segment 130 .

[0085] Specifically, the upper segment straight web bar 1221 and the lower segment straight web bar 1321 are connected by bolts, rivets and other connectors. In this step, the bolts, rivets and other connectors between the upper segment straight web bar 1221 and the lower segment straight web bar 1321 are disassembled.

[0086] S620, dismantle the connecting piece connecting the flange 150 on the upper section 111 of the pull rod and the flange 150 on the lower section 112 of the pull rod, and cut the code plate 140, so that the upper segment 120 and the lower segment 130 are separated.

[0087] S700, please combine Figure 7 , Figure 8 and Fig. 9 As shown, the upper segment 120 is hoisted, the upper segment 120 and the lower segment 130 are offset, and the upper segment 120 is placed on the bracket 160 .

[0088] Specifically, the upper segment straight webs 1221 and the lower segment straight webs 1321 are misaligned so that the upper segment straight webs 1221 are no longer located above the lower segment straight webs 1321, and then the upper segment 120 is lowered onto the bracket 160. In this way, the upper segment straight webs 1221 and the lower segment straight webs 1321 have an overlapping area in the height direction, and the overall height of the truss segment 100 becomes lower. The truss segment 100 can pass through some lower bridge openings, so that the segment can be smoothly transported to the construction site.

[0089] Step S700 may include S710 and S720.

[0090] S710, moving the upper segment 120 along the length direction, so that the upper segment 120 and the lower segment 130 are offset by a set distance in the length direction.

[0091] S720 , moving the upper segment 120 along the width direction, so that the upper segment 120 and the lower segment 130 are offset by a set distance in the width direction.

[0092] With this design, the upper segment straight web member 1221 and the lower segment straight web member 1321 are offset in both the length direction and the width direction, which helps to reduce the space occupied in the length direction or the width direction after the upper segment 120 and the lower segment 130 are offset.

[0093] In some embodiments, the upper segment 120 and the lower segment 130 are offset by 2 m in the length direction and by 0.5 m in the width direction.

[0094] In some embodiments, when all constraints of the upper segment 120 are released, the crane lifts the upper segment 120 so that the upper segment 120 is about 200 mm higher than the straight web splicing plate, and then translates about 2 m in the length direction and 0.5 m in the width direction before dropping on the pier.

[0095] S800, please combine Fig.10 As shown, a retaining pile 170 is fixed on the bracket 160, and a spacing is provided between the retaining pile 170 and the upper segment 120 along the length direction; and a sleeper 180 is inserted into the spacing.

[0096] When the stacked truss segments 100 are transported, the width direction of the truss segments 100 is parallel to the length direction of the ship, and the length direction is parallel to the width direction of the ship. During transportation, the upper segment 120 is prone to shift in the width direction if no limiting measures are taken. The shift in the length direction is very small and can be ignored. Therefore, the upper segment 120 can be positioned in the width direction through S600 to reduce the shift of the upper segment 120 in the width direction.

[0097] In some embodiments, the spacing between the stop pile 170 and the upper segment 120 is 200 mm, and the size of the sleeper 180 along the width direction is also 200 mm.

[0098] In summary, the present invention first cuts the tie rod 110 to divide the tie rod 110 into two sections, upper and lower, and connects them detachably, which facilitates the disconnection of the tie rod upper section 111 and the tie rod lower section 112 when the upper segment 120 and the lower segment 130 are separated later, and also facilitates the connection of the tie rod upper section 111 and the tie rod lower section 112 after the truss segment 100 is transported to the construction site, which facilitates the restoration of the truss segment 100. A bracket 160 is set on the lower segment 130, and the upper segment 120 is hoisted, so that the upper segment 120 is displaced and placed on the bracket 160, so that the upper segment 120 and the lower segment 130 have overlapping areas in the height direction, thereby reducing the total height of the truss segment 100, so that the truss segment 100 can pass through certain bridge holes during transportation. The bracket 160 supports the dislocated upper segment 120 so that the upper segment 120 will not fall down after being dislocated, thereby ensuring stability during subsequent transportation.

[0099] The present invention smoothly completes the force system conversion of the truss segment 110 by designing the flange 150, welding the code plate 140 to support the tie rod 110 and cutting the tie rod 110 one by one, and can effectively prevent the upper segment 120 from becoming unstable and falling. The flange 150 is designed so that when the upper segment 120 and the lower segment 130 are separated, the bolts can be removed. When the truss segment 100 is transported to the construction site for restoration, the bolts can be installed to connect the flange 150. The dislocation stacking and restoration of the truss segment 100 are more convenient, and the force strength of the truss segment 100 can also be guaranteed.

[0100] Before hoisting the upper segment 120, the present invention accurately calculates the center of gravity of the upper segment 120 and the force applied to each lifting eye 190. According to the force applied to the lifting eye 190, the shackle, steel rope, etc. are reasonably selected, and the force applied by each hook is reasonably arranged, thereby ensuring the safety of the hoisting. When hoisting the upper segment 120, the hoisting lifting eye 190 of the entire hoisting truss segment 100 is used, and the lifting eye 190 does not need to be made separately, thereby reducing the difficulty of construction.

[0101] The present invention also applies 100% force to the main and auxiliary hooks of the crane according to the overload condition of the truss segment 100, so that the segment is in a balanced state, thereby reducing the influence of the lateral force generated by the overload of the truss segment 100 on the removal of the punches and bolts.

[0102] The present invention also limits the sliding of the truss segment 100 by designing the retaining piles 170 and the sleepers 180, thereby further ensuring the safety of the transportation of the truss segment 100.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0104] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0105] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for staggered stacking of truss beam segments, characterized in that: The truss segment (100) comprises a tie rod (110), an upper segment (120) and a lower segment (130); the upper segment (120) is located above the lower segment (130) and is fixedly connected to the lower segment (130); the tie rod (110) is arranged between the upper segment (120) and the lower segment (130) and is fixedly connected to the upper segment (120) and the lower segment (130); the stacking method comprises: The pull rod (110) is divided into a pull rod upper section (111) and a pull rod lower section (112), and the pull rod upper section (111) and the pull rod lower section (112) are detachably connected; A support (160) for supporting the upper segment (120) is provided on the lower segment (130); Applying force to the upper segment (120) by means of a lifting device so that the truss segment (100) is in a balanced state; Separating the upper segment (120) and the lower segment (130), and separating the upper pull rod segment (111) and the lower pull rod segment (112), so that the upper segment (120) is in an unconstrained state; The upper segment (120) is hoisted to displace the upper segment (120) and the lower segment (130), and the upper segment (120) is placed on the bracket (160).

2. The method for staggered assembly of truss beam segments according to claim 1, characterized in that: The method of dividing the pull rod (110) into a pull rod upper section (111) and a pull rod lower section (112), and making the pull rod upper section (111) and the pull rod lower section (112) detachably connected, comprises: A code plate (140) is welded to the portion of the pull rod (110) that needs to be divided, wherein the code plate (140) has an avoidance notch (140a), and the avoidance notch (140a) faces the pull rod (110); The pull rod (110) is cut in the avoidance notch (140a) to obtain the pull rod upper section (111) and the pull rod lower section (112), and the distance between the pull rod upper section (111) and the pull rod lower section (112) is ensured to be able to accommodate two flanges (150); The flanges (150) are respectively welded to the pull rod upper section (111) and the pull rod lower section (112), and the two flanges (150) are connected via a connecting piece.

3. The method for staggered assembly of truss beam segments according to claim 2, characterized in that: Before welding the code plate (140) to the portion of the pull rod (110) that needs to be cut, the stacking method further comprises: marking a cutting line on the pull rod (110).

4. The method for staggered assembly of truss beam segments according to claim 2, characterized in that: The truss segment (100) comprises a plurality of tie rods (110), wherein the plurality of tie rods (110) are sequentially divided into an upper tie rod section (111) and a lower tie rod section (112), and the upper tie rod section (111) and the lower tie rod section (112) are detachably connected.

5. The method for staggered assembly of truss beam segments according to claim 2, characterized in that: The upper segment straight web rod (1221) of the upper segment (120) and the lower segment straight web rod (1321) of the lower segment (130) are fixedly connected; the upper segment (120) and the lower segment (130) are separated, and the upper pull rod segment (111) and the lower pull rod segment (112) are separated, so that the upper segment (120) is in an unconstrained state, comprising: Disassembling the connecting piece connecting the upper segment straight web rod (1221) and the lower segment straight web rod (1321); The connecting piece connecting the flange (150) on the upper section (111) of the pull rod and the flange (150) on the lower section (112) of the pull rod is disassembled, and the code plate (140) is cut.

6. The method for staggered stacking of truss beam segments according to any one of claims 1 to 5, characterized in that: After lifting the upper segment (120), displacing the upper segment (120) and the lower segment (130), and placing the upper segment (120) on the bracket (160), the stacking method further comprises: Fixing a retaining pile (170) on the support (160), and ensuring that there is a distance between the retaining pile (170) and the upper segment (120) along the length direction; A sleeper (180) is inserted into the spacing.

7. The method for staggered assembly of truss beam segments according to any one of claims 1 to 5, characterized in that: Before applying force to the upper segment (120) by means of lifting equipment to place the upper segment (120) in a balanced state, the stacking method further comprises: using a modular vehicle to transport the truss segment (100) to a factory building; and lifting the upper segment (120) by means of a crane in the factory building.

8. The method for staggered assembly of truss beam segments according to claim 7, characterized in that: The upper segment (120) is hoisted by two cranes in parallel.

9. The method for staggered assembly of truss beam segments according to any one of claims 1 to 5, characterized in that: The method of causing the upper segment (120) and the lower segment (130) to be offset comprises: moving the upper segment (120) along the length direction so that the upper segment (120) and the lower segment (130) are offset by a set distance in the length direction; and moving the upper segment (120) along the width direction so that the upper segment (120) and the lower segment (130) are offset by a set distance in the width direction.

10. The method for staggered stacking of truss beam segments according to any one of claims 1 to 5, characterized in that: Before applying force to the upper segment (120) by means of a lifting device to place the upper segment (120) in a balanced state, the stacking method further comprises: rechecking the lifting center of gravity of the upper segment (120) and calculating the force on the lifting lug (190).

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