Lossless hoisting device for hoisting bridge of bridge girder erection machine and construction method

Abstract

The invention discloses a lossless hoisting device for hoisting a bridge of a bridge girder erection machine and a construction method. The hoisting device comprises a frame body which is matched with a main beam to be adjustably mounted, a hoisting crown block mounted on the frame body and a protection plate mechanism which is matched with a sling of the hoisting crown block for use, the sling penetrates through the protective plate mechanism and is matched with a bridge for protective hoisting; according to the technical scheme, the sling penetrates through the protection plate mechanism, the protection plate mechanism directly makes contact with the contact face corresponding to the bridge, effective attaching contact is formed, compared with a traditional mode that the sling directly acts on bridge hoisting, the protection plate mechanism can protect the bridge hoisting contact point, and the damage to the bridge hoisting contact point is avoided. And the situation that the bridge is pressed and damaged in the hoisting process can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction, and in particular to a non-destructive lifting device and a construction method for lifting a bridge by a bridge erection machine. Background Art

[0002] A precast concrete beam is a concrete beam component that is prefabricated in a factory or prefabrication yard. It is widely used in construction, bridges and other projects. For the precast concrete box beam, it is named because of its box-shaped cross-section. It is widely used in bridge engineering and construction engineering. The cross-section shape of the concrete box beam is box-shaped. This cross-section has greater torsional stiffness and bending stiffness, and can effectively resist various loads.

[0003] During the existing bridge erection machine bridge hoisting and installation construction, the bridge (box girder) is generally tied with steel wire ropes and then hoisted, transported, debugged and installed using a crane. However, this hoisting method will cause mutual squeezing, sliding, and misalignment between the steel wire ropes and the precast concrete beams. The contact area between the steel wire ropes and the precast concrete beams is very small. Due to the heavy weight of the bridge itself, the pressure is too concentrated, which can easily cause damage to the contact points of the precast concrete beams and affect the quality of the bridge.

[0004] Therefore, in order to solve the above problems, a non-destructive lifting device for lifting bridges by a bridge erection machine is needed to solve the above problems. Summary of the Invention

[0005] In view of this, the non-destructive lifting device for bridge hoisting by a bridge-building machine of this technical solution forms an effective fitting contact by passing the sling through the guard plate mechanism, and the guard plate mechanism directly contacts the contact surface corresponding to the bridge. Compared with the traditional method of directly acting on the bridge for lifting with the sling, the guard plate mechanism can protect the bridge lifting contact point and effectively avoid the pressure damage to the bridge during the lifting process.

[0006] A non-destructive lifting device for lifting a bridge by a bridge erection machine comprises a frame that can be adjusted to fit a main beam, a lifting trolley mounted on the frame, and a guard plate mechanism used in conjunction with the lifting cable of the lifting trolley; the lifting cable passes through the guard plate mechanism and cooperates with the bridge protection lifting.

[0007] Furthermore, the guard plate mechanism includes a lower guard plate assembly for cooperating with the lower side protection lifting of the bridge and an upper guard plate assembly for cooperating with the upper side protection lifting of the bridge. The upper guard plate assembly includes an upper left guard plate assembly and an upper right guard plate assembly with the same structure, and the lower guard plate assembly includes a lower left guard plate assembly and a lower right guard plate assembly with the same structure. The sling passes through the upper left guard plate assembly, the lower left guard plate assembly, the lower right guard plate assembly and the upper right guard plate assembly in sequence.

[0008] Furthermore, the left lower guard plate assembly includes a lower guard plate and an oblique guard plate that are hinged to each other, and an elastic cushion layer is provided on the surface of the lower guard plate.

[0009] Furthermore, an auxiliary support plate is installed on the oblique guard plate, and multiple groups of springs are arranged between the oblique guard plate and the auxiliary support plate.

[0010] Furthermore, pulleys for guiding and limiting the sling are installed in the oblique guard plate and the lower guard plate.

[0011] Furthermore, the upper left guard plate assembly includes a side plate for pressing against the bridge and a horizontal plate hinged to the upper end of the side plate, and a pulley is installed in the side plate to cooperate with the sling guide limit installation.

[0012] Furthermore, an arc-shaped relief groove is provided on the lower end surface of the horizontal plate.

[0013] A construction method of a non-destructive hoisting device for hoisting a bridge by a bridge erection machine comprises the following steps:

[0014] S1: Move the frame to the top of the bridge end and determine the installation position where the bridge needs to be lifted;

[0015] S2: The overhead crane releases the sling downwards, so that the upper guard plate assembly and the lower guard plate assembly on the sling fit in with the corresponding positions of the bridge respectively;

[0016] S3: The crane slowly tightens the slings to ensure that the elastic cushion of the lower guard plate is in close contact with the lower surface of the bridge, the side plates and auxiliary support plates are in close contact with the bridge, and the cross plates are in close contact with the upper end surface of the bridge.

[0017] S4: Check whether the sharp corners at the lower end of the bridge are in contact with the lower guard plate assembly.

[0018] The beneficial effects of the present invention are: the non-destructive lifting device for lifting bridges by bridge-building machines of this technical solution forms effective fitting contact by having the sling pass through the guard plate mechanism, and the guard plate mechanism directly contacts the contact surface corresponding to the bridge. Compared with the traditional method of directly acting on the bridge for lifting with the sling, the guard plate mechanism can protect the bridge lifting contact point and effectively avoid the pressure damage to the bridge during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the installation of the overhead crane of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall end face of the present invention;

[0022] Figure 3This is a schematic diagram of the end face of the lifting bridge of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation of steel bars on the upper end face of the bridge according to the present invention. DETAILED DESCRIPTION

[0024] Figure 1 This is a schematic diagram of the installation of the overhead crane of the present invention; Figure 2 This is a schematic diagram of the overall end face of the present invention; Figure 3 This is a schematic diagram of the end face of the lifting bridge of the present invention; Figure 4 Schematic diagram of the installation of steel bars on the upper end face of the bridge of the present invention; as shown in the figure, a non-destructive lifting device for lifting a bridge by a bridge erection machine comprises a frame 42 that can be adjusted to cooperate with the main beam 1, a hoisting trolley 41 installed on the frame, and a guard plate mechanism used with the sling 6 of the hoisting trolley; the sling 6 passes through the guard plate mechanism and cooperates with the bridge 5 for protective lifting; the two ends of the main beam 1 are respectively installed in conjunction with the front support legs 2 and the rear support legs 3, and the lifting mechanism 4 comprises a hoisting trolley 41 and a frame 42. The lifting mechanism 4 is adjustably installed on the main beam. After lifting the bridge, it is transported, adjusted and installed. The non-destructive lifting device for lifting a bridge by a bridge erection machine of this technical solution, through the sling passing through the guard plate mechanism, the guard plate mechanism directly contacts the contact surface corresponding to the bridge, forming an effective fitting contact. Compared with the traditional method of directly acting on the bridge for lifting with the sling, the guard plate mechanism can protect the bridge lifting contact point, which can effectively avoid the pressure damage to the bridge during the lifting process.

[0025] In this embodiment, the guard plate mechanism includes a lower guard plate assembly for cooperating with the lower side protection hoisting of the bridge 5 and an upper guard plate assembly for cooperating with the upper side protection hoisting of the bridge. The upper guard plate assembly includes a left upper guard plate assembly and a right upper guard plate assembly with the same structure. The lower guard plate assembly includes a left lower guard plate assembly and a right lower guard plate assembly with the same structure. The sling 6 passes through the left upper guard plate assembly, the left lower guard plate assembly, the right lower guard plate assembly and the right upper guard plate assembly in sequence. Figure 2 、 Figure 3 As shown, when the bridge 5 (a box girder structure with a cross section as shown in the figure in this technical solution) is installed in conjunction with the sling, the four guard plate assemblies are respectively positioned by cooperating with the four points of the bridge 5, that is, the upper side surface of the bridge 5 (including the left side surface 51 and the symmetrically arranged right side surface) and the left and right lower ends of the bridge are installed in conjunction. After the sling passes through the four guard plate assemblies, the bridge is lifted in contact with multiple surfaces. Compared with the traditional line contact method in which the sling directly acts on the bridge surface, the multi-guard plate structure is subjected to reduced pressure on the contact parts under the same weight of the bridge, so that the bridge can be effectively protected during the lifting process.

[0026] In this embodiment, the left lower guard plate assembly includes a lower guard plate 11 and an oblique guard plate 10 that are hinged to each other, and an elastic pad 12 is provided on the surface of the lower guard plate 11. The left lower guard plate assembly and the right lower guard plate assembly adopt the same structure, and the corresponding left upper guard plate assembly and the right upper guard plate assembly also adopt the same structural setting, which makes the overall structure simpler and more versatile when the components reach the end of their service life and need to be replaced. The lower guard plate 11 and the oblique guard plate 10 are connected and installed in an articulated manner (the specific articulation adopts the installation method in the existing technology, which will not be described here). An elastic pad 12 (vulcanized rubber or other elastic layer materials) is provided on the upper surface of the lower guard plate 11 (i.e., the surface that needs to contact the bridge). This not only enhances the friction between the lower guard plate and the bridge and improves the stability of the bridge during lifting, but also increases the contact area of ​​the lower surface of the bridge compared to the direct contact method of the traditional sling, effectively protecting the quality of the lower surface of the bridge from damage.

[0027] In this embodiment, an auxiliary support plate 14 is installed on the oblique guard plate 10, and multiple groups of springs 13 are arranged between the oblique guard plate and the auxiliary support plate 14. The auxiliary support plate 14 and the oblique guard plate 10 can be arranged in parallel with each other, and multiple groups of springs 13 are connected between the two (the connection and installation of the springs can adopt the existing installation method). After the lower guard plate 11 is fitted and installed with the lower surface 53 of the bridge 5, the lower guard plate 11 is parallel to the horizontal plane, and the auxiliary support plate 14 of the corresponding oblique guard plate 10 (the auxiliary support plate can also be made of elastic material) is fitted and installed with the side 52 of the bridge 5. The angle between the lower surface 53 of the bridge and the side 52 determines the angle between the lower guard plate 11 and the oblique guard plate 10. Compared with the traditional suspension The cable acts directly on the surface of the bridge. This technical solution enables the lower surface 53 and side surface 52 of the bridge to directly contact the corresponding elastic pad 12 and auxiliary support plate 14 (the length of the spring and the length and position of the support plate are selected and installed according to the specific size of the bridge 5, and the side surface plays the role of auxiliary support limit, and the main force point is at the position of the lower guard plate 11). The angle position between the lower surface 53 and the side surface 52 (when the traditional sling is in direct contact, the damage here is the most serious) will not produce a contact point, which directly and effectively avoids the generation of damaged contact points and effectively protects it.

[0028] In this embodiment, pulleys 9 for guiding and limiting the installation of the sling 5 are installed in the oblique guard plate 10 and the lower guard plate 11. Guide holes are opened in the oblique guard plate 10 and the lower guard plate 11, and pulley structures are set in the guide holes to facilitate the guiding and limiting of the sling 5 (the specific installation of the pulley in the guard plate adopts the installation method of the existing technology and is not described here). According to the use selection, the pulley 9 can also be not installed, that is, the sling 5 can directly pass through the oblique guard plate 10 and the lower guard plate 11.

[0029] In this embodiment, the upper left guard plate assembly includes a side plate 7 for pressing against the bridge and a horizontal plate 8 hinged to the upper end of the side plate. A pulley 9 is installed in the side plate 7 to cooperate with the sling guide limit installation. When the side panels 7 are installed and used, they are fitted on the upper side surface 51 of the bridge 5, and their vertical length can be longer than the upper side surface 51. The upper end of the side panels 7 is hingedly installed with a cross plate 8. When in use, the upper side surface 51 of the bridge 5 is provided with connecting steel bars 511 for casting, and its side panels 7 are installed between two adjacent connecting steel bars 511, while the cross plate 8 is fitted on the upper surface of the bridge 5. After the slings 6 are lifted and tightened, the side panels 7 directly act on the upper side surface 51, which effectively protects the bridge. The pulleys 9 in the corresponding side panels 7 can be installed in the same manner as the pulleys in the oblique guard plates 10. Through the auxiliary support plates 14 and the lower guard plates 11 coordinated with the side panels 7 and the oblique guard plates 10, a comprehensive contact protection effect is formed when the bridge is lifted, avoiding the direct action of the slings on the bridge to cause damage.

[0030] In this embodiment, the lower end surface of the transverse plate 8 is provided with an arc-shaped clearance groove 81. The transverse plate 8 is formed with a clearance groove structure near the position where the hinged side plate 7 is installed, so that the end position of the upper surface of the bridge will not be squeezed and damaged.

[0031] A construction method of a non-destructive hoisting device for hoisting a bridge by a bridge erection machine comprises the following steps:

[0032] S1: Move the frame 42 to the position just above the end of the bridge 5 and determine the installation position where the bridge needs to be lifted;

[0033] S2: The overhead crane 41 releases the sling 6 downward, so that the upper and lower guard plate assemblies on the sling are respectively fitted to the corresponding positions of the bridge; the cross plate 8 of the upper guard plate assembly is fitted to the upper surface of the bridge 5, and the side plates 7 are correspondingly installed between the connecting steel bars 511, forming an effective positioning installation. Of course, after the left and right upper guard plate assemblies are installed, they are on the same horizontal plane as the frame 42, which is convenient for vertical lifting; the left and right lower guard plate assemblies are also fitted and positioned to ensure that the lower guard plate 11 is completely fitted to the lower surface of the bridge;

[0034] S3: The overhead crane 41 slowly tightens the sling 6 to ensure that the elastic cushion of the lower guard plate is in close contact with the lower surface of the bridge, the side plates and auxiliary support plates are in close contact with the bridge, and the cross plate is in close contact with the upper end surface of the bridge; the sling is slowly lifted and tightened to ensure that all contact surfaces are in close contact;

[0035] S4: Check whether the angular part of the lower end of the bridge (i.e. the protruding position of the angle between the lower surface 53 and the side surface 52) contacts the lower guard plate assembly. After observation and inspection to ensure that the lifting requirements are met, subsequent construction can be carried out.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A non-destructive lifting device for lifting a bridge by a bridge erection machine, characterized by: It includes a frame that can be adjusted to match the main beam, a lifting trolley installed on the frame, and a guard plate mechanism used in conjunction with the lifting rope of the lifting trolley; the lifting rope passes through the guard plate mechanism and matches the bridge protection lifting.

2. The non-destructive lifting device for bridge hoisting of a bridge erection machine according to claim 1 is characterized in that: The guard plate mechanism includes a lower guard plate assembly for cooperating with the lower side protection lifting of the bridge and an upper guard plate assembly for cooperating with the upper side protection lifting of the bridge. The upper guard plate assembly includes an upper left guard plate assembly and an upper right guard plate assembly with the same structure. The lower guard plate assembly includes a lower left guard plate assembly and a lower right guard plate assembly with the same structure. The sling passes through the upper left guard plate assembly, the lower left guard plate assembly, the lower right guard plate assembly and the upper right guard plate assembly in sequence.

3. The non-destructive lifting device for lifting a bridge by a bridge erection machine according to claim 2 is characterized in that: The left lower guard plate assembly includes a lower guard plate and an oblique guard plate that are hinged to each other, and an elastic cushion layer is provided on the surface of the lower guard plate.

4. The non-destructive lifting device for lifting a bridge by a bridge erection machine according to claim 3 is characterized in that: An auxiliary support plate is installed on the oblique guard plate, and multiple groups of springs are arranged between the oblique guard plate and the auxiliary support plate.

5. The non-destructive lifting device for lifting a bridge by a bridge erection machine according to claim 3 is characterized in that: Pulleys for guiding and limiting the installation of the slings are installed in the oblique guard plate and the lower guard plate.

6. The non-destructive lifting device for lifting a bridge by a bridge erection machine according to claim 2, characterized in that: The upper left guard plate assembly includes a side plate for pressing against the bridge and a horizontal plate hinged to the upper end of the side plate, and a pulley is installed in the side plate to cooperate with the sling guide limit installation.

7. The non-destructive lifting device for lifting a bridge by a bridge erection machine according to claim 6, characterized in that: An arc-shaped giving way groove is provided on the lower end surface of the horizontal plate.

8. A construction method of a non-destructive hoisting device for bridge hoisting by a bridge erection machine according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Move the frame to the top of the bridge end and determine the installation position where the bridge needs to be lifted; S2: The overhead crane releases the sling downwards, so that the upper guard plate assembly and the lower guard plate assembly on the sling fit in with the corresponding positions of the bridge respectively; S3: The crane slowly tightens the slings to ensure that the elastic cushion of the lower guard plate is in close contact with the lower surface of the bridge, the side plates and auxiliary support plates are in close contact with the bridge, and the cross plates are in close contact with the upper end surface of the bridge. S4: Check whether the sharp corners at the lower end of the bridge are in contact with the lower guard plate assembly.

Images