Temporary supporting system for bridge

Abstract

The utility model relates to a bridge temporary supporting system which comprises multiple layers of steel boxes, two steel boxes arranged in any two adjacent layers of steel boxes in the height direction of a bridge are fixedly connected, and a splice plate is fixed between any two adjacent steel boxes in each layer of steel boxes; the jack and the steel box on the top layer are located on the same layer. The steel box can be modularly assembled through the jack, the service time of large construction machinery can be greatly shortened, channel operation is not affected during operation, a navigation channel is not occupied, navigation is not closed during construction, navigation safety is guaranteed, modular assembly of the temporary bridge supporting system is achieved, and follow-up displacement protection of the steel truss girder is facilitated.

Description

Technical Field

[0001] The present application relates to the field of steel truss jacking, and in particular to a temporary support system for bridges. Background Art

[0002] With the rapid development of shipping and the increasing size of ships, some older, long-span steel truss bridges no longer meet navigation safety requirements and have become obstructions. These older bridges are built long ago, to low standards, with severely corroded members and a high risk of demolition.

[0003] In related technologies, traditional on-site demolition construction will block half of the navigable waterway, affecting navigation safety; at the same time, some old bridges need to be completely protected and preserved as historical relics, and destructive demolition will cause the loss of bridge heritage. Moreover, during protective relocation demolition, the approach bridge part of the steel truss bridge is not easy to be demolished first as a construction operation channel. Therefore, a temporary support system is required to lift the bottom of the steel truss to the elevation of the top of the approach bridge track to facilitate subsequent relocation protection. Summary of the Invention

[0004] The present application provides a temporary support system for bridges, in which steel boxes can be modularly assembled using jacks, which can significantly reduce the use time of large-scale construction machinery. During operation, it does not affect the operation of waterways, does not occupy navigable waterways, and does not close navigation during construction, thus ensuring navigation safety. It realizes the modular assembly of the temporary support system for bridges, and facilitates the subsequent displacement and protection of steel trusses.

[0005] The present invention provides a temporary bridge support system, which includes:

[0006] Multi-layer steel boxes, in any two adjacent layers of the steel boxes, two of the steel boxes arranged along the height direction of the bridge are fixedly connected, and in each layer of the steel boxes, a splicing plate is fixed between any two adjacent steel boxes;

[0007] The jack is located on the same layer as the steel box on the top layer.

[0008] In one embodiment, the steel box comprises:

[0009] A plurality of I-beams, wherein the plurality of I-beams are spaced apart along the longitudinal bridge direction, the upper flange plate and the lower flange plate of the I-beam are coaxially provided with a first threaded hole, and the web plate of the I-beam is provided with a second threaded hole;

[0010] A plurality of stiffening plates are fixed between any two adjacent I-beams.

[0011] In one embodiment, N steel boxes, splicing plates and the jacks form a set of support assemblies. There are multiple support assemblies, and every two support assemblies are used to be set on a bridge pier, and a transverse connecting assembly is fixed between the two support assemblies on the bridge pier.

[0012] In one embodiment, the transverse connection assembly comprises:

[0013] A plurality of transverse connecting rods, wherein the plurality of transverse connecting rods are spaced apart along the height direction of the bridge, and the length direction of the transverse connecting rods extends along the transverse direction of the bridge;

[0014] In the two support assemblies on the pier, one end of the transverse connecting rod is fixedly connected to the steel box in the first group of support assemblies, and the other end thereof is fixed to the steel box in the second group of support assemblies.

[0015] In one embodiment, the cross section of the transverse connecting rod is in a square shape.

[0016] In one embodiment, the transverse connection assembly further comprises:

[0017] A plurality of vertical connecting rods are spaced apart along the transverse direction of the bridge, and the length direction of the vertical connecting rods extends along the height direction of the bridge, and the vertical connecting rods are fixed to the plurality of transverse connecting rods.

[0018] In one embodiment, the transverse connection assembly further comprises:

[0019] A plurality of oblique connecting rods are spaced apart along the transverse direction of the bridge, the length direction of the oblique connecting rods is set at an acute angle to the height direction of the bridge, and the oblique connecting rods are fixed to the plurality of transverse connecting rods.

[0020] In one embodiment, the vertical connecting rod is arranged between any two adjacent oblique connecting rods.

[0021] In one embodiment, the angle between the extension lines of any two adjacent oblique connecting rods is 90 degrees.

[0022] In one embodiment, the cross-sections of the vertical connecting rod and the oblique connecting rod are concave-shaped.

[0023] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0024] The steel boxes on each layer can be assembled modularly using jacks, significantly reducing the time large construction machinery is used. Modular assembly does not affect waterway operations, does not occupy navigable waterways, and does not require closures, ensuring navigation safety. The splicing plates allow for low precision positioning and installation of adjacent steel boxes on each layer, resulting in a reliable structure and easy installation and removal. The last steel box on the top floor serves as a contact point for support. This modular assembly of the bridge's temporary support system allows for a small footprint, simple steel box structure, clear force distribution, and easy installation and transport. After the temporary support system lifts the entire bridge, it facilitates subsequent displacement and protection of the steel trusses. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a structural diagram of the steel box from the perspective of the longitudinal bridge direction;

[0027] Figure 2 This is a structural diagram of the steel box from the perspective of the transverse bridge direction;

[0028] Figure 3 This is a structural diagram of the steel box from the perspective of the bridge height;

[0029] Figure 4 It is a structural diagram of the transverse connection component from the perspective of the transverse bridge;

[0030] Figure 5 This is a structural diagram of the transverse connection component from the perspective of the bridge height direction;

[0031] Figure 6 Schematic diagram of the structure in preparation for dismantling the support;

[0032] Figure 7 This is a structural diagram for installing part of the steel box on the second floor;

[0033] Figure 8 This is a structural diagram of the first pad at the third-layer steel box position;

[0034] Figure 9 This is a structural diagram of the fifth pad at the third-layer steel box position;

[0035] Figure 10 This is a structural diagram for installing part of the steel box on the third floor;

[0036] Figure 11Structural diagram for installing the remaining steel boxes on the second floor;

[0037] Figure 12 Schematic diagram of the structure of the temporary support system for the bridge after installation.

[0038] In the figure: 1. Steel truss; 2. Bridge pier; 201. Support; 3. Steel box; 301. I-beam; 302. First threaded hole; 303. Stiffener; 304. Second threaded hole; 4. Splicing plate; 5. Jack; 6. Horizontal connection assembly; 601. Horizontal connecting rod; 602. Vertical connecting rod; 603. Diagonal connecting rod; 7. Embedded parts; 8. Spacer. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 this application.

[0040] The embodiment of the present application provides a temporary support system for bridges. The steel boxes can be modularly assembled by jacks, which can greatly reduce the use time of large-scale construction machinery. During operation, it does not affect the operation of the waterway, does not occupy the navigable waterway, and does not close the waterway during construction, thereby ensuring navigation safety. It realizes the modular assembly of the temporary support system for bridges, which is convenient for the subsequent displacement and protection of steel trusses.

[0041] like Figure 12 The bridge pier 2 is shown from a longitudinal perspective. This embodiment of the present application provides a temporary bridge support system, which may include: multiple layers of steel boxes 3, with two adjacent layers of steel boxes 3 arranged along the bridge's height being fixedly connected. Within each layer of steel boxes 3, a splicing plate 4 is fixed between any two adjacent steel boxes 3; and jacks 5, located on the same level as the top layer of steel boxes 3. The top layer of steel boxes 3 may be multiple or single.

[0042] For example, refer to Figure 12 There are six layers of steel boxes 3 on each pier 2, with four steel boxes 3 on each layer, and a remaining steel box 3 is set on the top of the same layer of steel boxes 3 to directly contact the bottom of the supporting steel truss 1.

[0043] Specifically, the steel boxes 3 on each layer can be modularly assembled using jacks 5, significantly reducing the time it takes to use large construction machinery. Modular assembly is performed on piers 2, ensuring safe navigation without affecting waterway operation or occupying navigable waterways. The splicing plates 4 ensure low precision positioning of adjacent steel boxes 3 on each layer, resulting in a reliable structure and easy installation and removal. The last steel box 3 on the top layer serves as a contact point for support. This provides temporary support for the bridge, occupies a small area, and features a simple steel box 3 structure with clear force distribution, making installation and transportation easy. After the temporary support system lifts the entire bridge, it facilitates subsequent displacement and protection of the steel trusses 1.

[0044] In one embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the steel box 3 may include: a plurality of I-beams 301, wherein the plurality of I-beams 301 are spaced apart along the longitudinal bridge direction, the upper flange plate and the lower flange plate of the I-beam 301 are coaxially provided with a first threaded hole 302, and the web of the I-beam 301 is provided with a second threaded hole 304; a plurality of stiffening plates 303, wherein a stiffening plate 303 is fixed between any two adjacent I-beams 301.

[0045] For example, specific reference Figure 2 As shown in the transverse bridge perspective, the steel box 3 includes five I-beams 301 spaced apart along the longitudinal bridge direction, and a stiffening plate 303 fixed between two adjacent I-beams 301, and the left side of the first I-beam 301 and the right side of the last I-beam 301 can also be fixed with the stiffening plate 303; wherein, the upper flange plate and the lower flange plate of the I-beam 301 are coaxially provided with a first threaded hole 302, and the first threaded hole 302 can realize a fixed connection between the upper and lower layers of the steel boxes 3, and the web of the I-beam 301 is provided with a second threaded hole 304, and the second threaded hole 304 can realize a fixed connection between adjacent steel boxes 3 on the same layer, which greatly improves the assembly efficiency of the steel box 3 and has low assembly precision requirements.

[0046] In one embodiment, Figure 12 、 Figure 4 and Figure 5 As shown, N steel boxes 3, splicing plates 4 and jacks 5 form a group of support components. There are multiple support components, and every two support components are used to be set on a pier 2, and a transverse connecting component 6 is fixed between the two support components on the pier 2.

[0047] For example, specific reference Figure 12 The N steel boxes 3, splicing plates 4 and jacks 5 on each pier 2 form a set of supporting components. Figure 4The two support assemblies shown are viewed from the longitudinal direction of the bridge, with at least one transverse connecting assembly 6 fixed between any two adjacent sets of support assemblies. Transverse connecting assemblies 6 can improve the anti-tilting capability of the N steel boxes 3 on pier 2, enhance the safety of temporary supports, and improve the integrity and anti-overturning capability of the two sets of support assemblies on the same pier 2.

[0048] In one embodiment, Figure 4 and Figure 5 As shown, the transverse connecting assembly 6 may include: a plurality of transverse connecting rods 601, the plurality of transverse connecting rods 601 are spaced apart along the height direction of the bridge, and the length direction of the transverse connecting rods 601 is extended along the transverse direction of the bridge; in the two support assemblies on the pier 2, one end of the transverse connecting rod 601 is fixedly connected to the steel box 3 in the first group of support assemblies, and the other end thereof is fixed to the steel box 3 in the second group of support assemblies.

[0049] For example, specific reference Figure 5 , the transverse connecting rods 601 are provided in two rows, and the two rows of transverse connecting rods 601 are spaced apart along the longitudinal bridge direction, for details, see Figure 4 As shown, each row of transverse connecting rods 601 consists of three, spaced apart along the bridge's height, with the spacing equal to the distance between each layer of steel boxes 3. The ends of the transverse connecting rods 601 are fixedly connected to the steel boxes 3 in the first support assembly, and the other ends are fixed to the steel boxes 3 in the second support assembly. This improves the integrity and anti-overturning capacity of the two support assemblies on the same pier 2.

[0050] In one embodiment, the cross section of the transverse connecting rod 601 is in the shape of a square. For example, the cross section of the transverse connecting rod 601 is in the shape of a square, which can reduce the weight of the transverse connecting rod 601 and improve the structural strength of the transverse connecting rod 601.

[0051] In one embodiment, Figure 4 and Figure 5 As shown, the transverse connecting assembly 6 can also include: multiple vertical connecting rods 602, which are spaced apart along the transverse direction of the bridge, and the length direction of the vertical connecting rods 602 is extended along the height direction of the bridge, and the vertical connecting rods 602 are fixed to the multiple transverse connecting rods 601.

[0052] For example, vertical connecting rods 602 can be fixed between each row of horizontal connecting rods 601, and the length direction of the vertical connecting rods 602 is extended along the height direction of the bridge, further improving the integrity and anti-overturning ability between the two groups of support components on the same pier 2.

[0053] In one embodiment, Figure 4 and Figure 5As shown, the transverse connecting assembly 6 can also include: multiple oblique connecting rods 603, multiple oblique connecting rods 603 are spaced apart along the longitudinal direction of the bridge, the length direction of the oblique connecting rods 603 is set at an acute angle to the height direction of the bridge, and the oblique connecting rods 603 are fixed to multiple transverse connecting rods 601.

[0054] For example, an oblique connecting rod 603 can be fixed between each row of transverse connecting rods 601, and the length direction of the oblique connecting rod 603 is set at an acute angle to the height direction of the bridge, further improving the integrity and anti-overturning ability between the two groups of support components on the same pier 2.

[0055] In one embodiment, Figure 4 and Figure 5 As shown, the vertical connecting rod 602 is arranged between any two adjacent oblique connecting rods 603.

[0056] For example, the vertical connecting rod 602 is disposed between any two adjacent oblique connecting rods 603 , which can balance the overall structural strength of the transverse connecting assembly 6 and prevent the problem of uneven force on a local part of the transverse connecting assembly 6 .

[0057] In one embodiment, Figure 4 As shown, the angle between the extension lines of any two adjacent oblique connecting rods 603 is 90 degrees.

[0058] For example, the angle between the extension lines of any two adjacent oblique connecting rods 603 is 90 degrees, so that the number of oblique connecting rods 603 arranged along the length direction of the transverse connecting rod 601 is neither too many nor too few, but is centered and can bring good connection strength.

[0059] In one embodiment, Figure 5 As shown, the cross sections of the vertical connecting rod 602 and the oblique connecting rod 603 are concave-shaped.

[0060] For example, by making the cross-sections of the vertical connecting rod 602 and the oblique connecting rod 603 concave, a lightweight design of the transverse connecting assembly 6 can be achieved, facilitating its construction and installation.

[0061] The temporary bridge support system is used in a bridge jacking method, which includes the following steps:

[0062] S1: If Figure 6 As shown, in each pier 2, the steel boxes 3 on both sides of the support 201 are installed, the steel truss 1 is lifted using two jacks 5, the support 201 is removed and the remaining steel boxes 3 of the first layer are installed;

[0063] For example, steel boxes 3 are installed on the left and right sides of the support 201 on each pier 2. The steel truss 1 is lifted by the two jacks 5 on the installed steel boxes 3 to release the support work of the support 201 on each pier 2. Then, the support 201 can be removed and the remaining steel boxes 3 at the position of the support 201 can be added, thereby completing the installation of the first layer of steel boxes 3.

[0064] S2: If Figure 7 、 Figure 8 and Figure 9 As shown, one jack 5 is used to lift and remove the other jack 5, and the second layer of the steel box 3 is installed at the removed jack 5. A plurality of cushion blocks 8 are alternately lifted and placed on the top of the second layer of the steel box 3 and the top of the jack 5 that has not been removed, until the height of the cushion blocks 8 on the top of the second layer of the steel box 3 reaches the height of one steel box 3; wherein, every two cushion blocks 8 are fixed with bolts;

[0065] For example, Figure 8 As shown, the steel truss 1 can be lifted using the jack 5 on the right side and the jack 5 on the left side can be removed. That is, the steel truss 1 can be lifted by multiple jacks 5 on one side. At this time, the second layer of steel boxes 3 can be installed on the left side of the right jack 5. The second layer of steel boxes 3 are fixedly connected to the corresponding steel boxes 3 on the first layer through the first threaded holes 302, and the adjacent steel boxes 3 on the same layer are fixedly connected through the second threaded holes 304. Then, the first spacer 8 is inserted into the second layer of steel boxes 3, as shown in FIG. Figure 8 As shown, the jack 5 is controlled to fall back, and at this time the steel truss 1 is directly supported by the first pad 8; then a pad 8 is placed on the top of the jack 5, and the jack 5 is controlled to lift the steel truss 1. At this time, the second layer of pads 8 are inserted into the second layer of steel box 3, and the jack 5 is controlled to fall back. At this time, the steel truss 1 is directly supported by two layers of pads 8. The jack 5 is controlled to lift the steel truss 1 repeatedly, and at this time the third layer of pads 8 are inserted into the second layer of steel box 3, and the jack 5 is controlled to fall back. At this time, the steel truss 1 is directly supported by three layers of pads 8, and then the second layer of pads 8 are placed on the top of the jack 5, and the jack 5 is controlled to lift the steel truss 1. Figure 9 As shown, the height of the five spacers 8 on the top of the second layer of steel box 3 reaches the height of one steel box 3, which is convenient for the subsequent installation of the third layer of steel box 3.

[0066] S3: If Figure 10 and Figure 11 As shown, the third layer of steel boxes 3 are installed to remove the multiple spacers 8 on the top of the second layer of steel boxes 3 and the multiple spacers 8 on the top of the jacks 5 to fill the remaining steel boxes 3 on the second layer;

[0067] For example, Figure 10As shown, the third layer of steel box 3 is installed so that the five spacers 8 on the top of the second layer of steel box 3 are removed. At this time, the steel truss 1 is directly supported by the third layer of steel box 3; Figure 11 As shown, the jack 5 is then controlled to fall back so that the four pads 8 on the top of the jack 5 can be removed, thereby facilitating the installation of the remaining steel boxes 3 on the right side of the second layer and completing the installation of the steel boxes 3 on the second layer.

[0068] S4: As Figure 12 As shown, the steps of alternately lifting and placing multiple pads 8 on the top of the second-layer steel box 3 and the top of the jack 5 that has not been removed are repeated; the third-layer steel box 3 is installed to remove the multiple pads 8 on the top of the second-layer steel box 3, and the multiple pads 8 on the top of the jack 5 are removed to complete the steps of the remaining steel boxes 3 of the second layer, and the assembly of multiple layers of steel boxes 3 is completed until the last steel box 3 and the jack 5 contact the supporting steel truss 1; wherein, a splicing plate 4 is fixed between any two adjacent steel boxes 3.

[0069] For example, the assembly work of the remaining third, fourth, fifth and sixth layers of steel boxes 3 can be repeated in a cycle of S2 and S3 until the last remaining steel box 3 contacts the bottom of the supporting steel truss 1 .

[0070] In summary, the bridge jacking method can utilize the jacks 5 to assemble each layer of steel boxes 3 to achieve rapid jacking of the steel truss 1, greatly reducing the use time of large-scale construction machinery and improving work efficiency. It can be built on the pier 2, and the operation does not affect the operation of the waterway, does not occupy the navigable waterway, and does not close the waterway during construction, thereby ensuring navigation safety.

[0071] In conjunction with the second aspect, in one embodiment, in S1, the following steps are included:

[0072] S101: Roughen the top surfaces of the piers 2 on both sides of the support 201 until the aggregate is exposed, drill holes to install embedded parts 7, and use the embedded parts 7 to install the steel boxes 3 on both sides of the support 201;

[0073] S102: Using two jacks 5 to lift the steel truss 1, and removing the support 201;

[0074] S103: roughen the top surface of the pier 2 at the bottom of the support 201 until the aggregate is exposed, drill holes to install the embedded parts 7, and use the embedded parts 7 to install the first layer of steel box 3.

[0075] In conjunction with the second aspect, in one embodiment, in S2, the following steps are included:

[0076] S201: Use one jack 5 to conduct a trial lift and remove the other jack 5;

[0077] S202: Based on the thrust of the jacks 5 on each pier 2, the total weight of the steel truss 1 is measured. According to the total weight of the steel truss 1, the upper limit of the thrust of the jacks 5 during jacking is set to prevent the steel truss 1 from tilting due to excessive thrust;

[0078] S203: Install the second layer of steel box 3 at the removed jack 5, and alternately lift and place multiple pads 8 on the top of the second layer of steel box 3 and the top of the jack 5 that has not been removed, until the height of the multiple pads 8 on the top of the second layer of steel box 3 reaches the height of one steel box 3, wherein every two pads 8 are fixed with bolts.

[0079] In conjunction with the second aspect, in one embodiment, before S202, the following steps are included:

[0080] S201-1: Check whether there is oil leakage on the jack 5, whether the hydraulic rod of the jack 5 is retracted, and whether there are deformation and cracks on the jack 5 and the steel box 3.

[0081] In conjunction with the second aspect, in one embodiment, after S202, the following steps are included:

[0082] S202-2: End the trial lifting of the jack 5, record the displacement of the steel truss 1 along the transverse direction of the bridge, and observe the posture and displacement of the steel truss 1 after the lifting.

[0083] In conjunction with the second aspect, in one embodiment, after S4, the following steps are further included:

[0084] S5: Install the transverse connection assembly 6 between the steel boxes 3 at both ends of the pier 2.

[0085] In summary, the bridge jacking method uses the temporary support system of the bridge and the specific operations are as follows:

[0086] Step 1: Process the top base surface of each pier 2;

[0087] Specifically, embedded parts 7 are installed according to the position of steel box 3, and the top surface of the large cushion stone of each pier 2 is roughened until the aggregate is exposed. Electric hammer drilling is used to plant reinforcement at the bottom of the position where the first layer of steel box 3 is to be installed. The drilling depth is 37 cm and the spacing is 18 cm.

[0088] Step 2: Install the first layer of steel box 3 and jack 5;

[0089] Specifically, after the embedded parts 7 are installed, the steel boxes 3 on both sides of the support 201 are installed first; then the formwork is set up, and the grouting material is filled so that the grouting material is in full contact with the bottom of the steel box 3, and the elevation and flatness of the first layer of steel box 3 are adjusted; after the strength of the grouting material reaches the design requirements, the formwork is removed; two jacks 5 are set up to release the constraints of the support 201, and the support 201 is removed symmetrically from the middle to both sides.

[0090] Step 3: Install the left side steel box 3 of the second layer, and use the left side steel box 3 of the second layer and the jacks 5 to alternately lift the steel truss 1 with the support of the steel box 3;

[0091] Specifically, refer to Figure 7 、 8 As shown in Figure 9, the original stroke of the jack 5 is 15 cm. To ensure safety during the lifting process, a standard lifting stroke of 10 cm is determined, which is 2 / 3 of the original stroke. 10 cm high pads 8 are used as temporary cushioning structures. The height of the steel boxes 3 is determined based on the stacking height of the pads 8. A smaller height affects construction efficiency, while a larger height can easily cause structural instability. Therefore, a 50 cm high steel box 3 is selected, and the pads 8 are stacked five layers high.

[0092] After jacks 5 have been synchronously lifted for a standard stroke, they are locked and a 10cm-high block 8 is placed on top of the left side of the second-story steel box 3. Jacks 5 slowly return the oil and lower the beam, placing a 10cm-high block 8 above jacks 5. This completes one stroke of jacking. Repeat these steps until the second layer of blocks 8 are placed on the left side of the second-story steel box 3. The upper and lower blocks 8 are connected as a single unit using 8.8-grade M22 bolts.

[0093] Reference Figure 9 , after the height of the pad 8 on the top of the steel box on the left side of the second layer reaches 50cm, the jack 5 is locked, refer to Figure 10 , replace the 5-layer pad 8 with a 0.5m high steel box 3, and connect the upper and lower steel boxes 3 with 8.8-grade M22 bolts to complete the installation of the left part of the third layer steel box 3. After the high-strength bolts are installed, refer to Figure 11 The jack 5 is slowly lowered to the top after the oil is returned to the bottom. The four pads 8 above the jack 5 are replaced with a 0.5m high steel box 3 and installed below the jack 5, completing the filling of the steel box 3 on the right side of the second floor. After the installation is completed, check the flatness and verticality of the steel box 3, the tightness of the high-strength bolts, and the firmness of the splicing plate 4.

[0094] Among them, before the formal jacking, the steel truss 1 is weighed and trial-lifted. The weighing result is used as the upper limit of the reaction force of the jacking support point of jack 5. By slowly adjusting the thrust of jack 5, the steel truss 1 is lifted by 5mm. Jack 5 feeds back the thrust of each lifting point to the computer to measure the total weight of steel truss 1. According to the data after weighing, the upper limit of the thrust at each lifting support point is set to avoid excessive thrust of jack 5 causing the steel truss 1 to tilt. The trial jacking height is 10mm, and the machine is shut down for 10 minutes to check whether there is oil leakage in jack 5 and whether the hydraulic rod is retracted; check whether there are deformation, cracks and other hazards on jack 5, steel box 3 and lower chord; after the trial jacking, the elevation of each measuring point and the lateral deviation of steel truss 1 are recorded, and the posture and structural deviation of steel truss 1 after jacking are observed.

[0095] Step 4: If Figure 4 and Figure 5 As shown, a transverse connection assembly 6 is installed between the steel boxes 3 at both ends of the pier 2;

[0096] Specifically, refer to Figure 4 and Figure 5 Each pier 2 is padded with two layers of steel boxes 3. Transverse connecting assemblies are installed between the steel boxes 3 in the transverse direction of the bridge to secure them. These assemblies include transverse connecting rods 601, vertical connecting rods 602, and diagonal connecting rods 603. Transverse connecting rods 601 are double-jointed 20a channel steel, welded to the stiffening plates 303 on the steel boxes 3 at both ends. Vertical connecting rods 602 and diagonal connecting rods 603 are 16a channel steel, with a total of five per side. Transverse connecting rods 601 are installed between the steel boxes 3 at each end of the pier 2 at every height of the steel boxes 3 on both sides to maintain stability. After multiple transverse connecting rods 601 are installed, the vertical connecting rods 602 and diagonal connecting rods 603 are installed.

[0097] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0098] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0099] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A temporary support system for a bridge, characterized in that: It includes: Multi-layer steel boxes (3), in any two adjacent layers of the steel boxes (3), two of the steel boxes (3) arranged along the height direction of the bridge are fixedly connected, and in each layer of the steel boxes (3), a splicing plate (4) is fixed between any two adjacent steel boxes (3); The jack (5) is located on the same layer as the steel box (3) on the top layer.

2. The temporary bridge support system according to claim 1, characterized in that: The steel box (3) comprises: A plurality of I-beams (301), wherein the plurality of I-beams (301) are spaced apart along the longitudinal bridge direction, the upper flange plate and the lower flange plate of the I-beam (301) are coaxially provided with a first threaded hole (302), and the web of the I-beam (301) is provided with a second threaded hole (304); A plurality of stiffening plates (303) are provided, wherein a stiffening plate (303) is fixed between any two adjacent I-beams (301).

3. The temporary bridge support system according to claim 1, characterized in that: N steel boxes (3), splicing plates (4) and the jacks (5) form a group of support components. The number of the support components is multiple, and every two of the support components are used to be arranged on a pier (2), and a transverse connecting component (6) is fixed between the two support components on the pier (2).

4. The temporary bridge support system according to claim 3, characterized in that: The transverse connection assembly (6) comprises: A plurality of transverse connecting rods (601), wherein the plurality of transverse connecting rods (601) are spaced apart along the height direction of the bridge, and the length direction of the transverse connecting rods (601) is extended along the transverse direction of the bridge; In the two support assemblies on the pier (2), one end of the transverse connecting rod (601) is fixedly connected to the steel box (3) in the first group of support assemblies, and the other end thereof is fixed to the steel box (3) in the second group of support assemblies.

5. The temporary bridge support system according to claim 4, characterized in that: The cross section of the transverse connecting rod (601) is in the shape of a square.

6. The temporary bridge support system according to claim 4, characterized in that: The transverse connection assembly (6) further comprises: A plurality of vertical connecting rods (602) are spaced apart along the transverse direction of the bridge, and the length direction of the vertical connecting rods (602) is extended along the height direction of the bridge. The vertical connecting rods (602) are fixed to the plurality of transverse connecting rods (601).

7. The temporary bridge support system according to claim 6, characterized in that: The transverse connection assembly (6) further comprises: A plurality of oblique connecting rods (603) are spaced apart along the transverse direction of the bridge, the length direction of the oblique connecting rods (603) is arranged at an acute angle to the height direction of the bridge, and the oblique connecting rods (603) are fixed to the plurality of transverse connecting rods (601).

8. The temporary bridge support system according to claim 7, characterized in that: The vertical connecting rod (602) is arranged between any two adjacent oblique connecting rods (603).

9. The temporary bridge support system according to claim 7, characterized in that: The angle between the extension lines of any two adjacent oblique connecting rods (603) is 90 degrees.

10. The temporary bridge support system according to claim 7, characterized in that: The cross sections of the vertical connecting rod (602) and the oblique connecting rod (603) are concave-shaped.

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