Slope-adjusting jacking device and construction method thereof

Abstract

The present invention relates to a slope-adjusting jacking device and a construction method thereof. The slope-adjusting jacking device comprises, from bottom to top, a jack with a piston facing downward, an angle adjustment module, a sliding plate, and a ceiling steel plate. Except for the sliding plate, other components are connected in sequence. The ceiling steel plate is fixed on a beam body to be jacked. There is a waist-shaped adjustment hole on the ceiling steel plate. The angle adjustment module comprises an upper adjustment module and a lower adjustment module, both of which have a spherical protrusion. A connecting pin is hinged with the upper and lower adjustment modules. A module fixing wedge is inserted between the upper and lower adjustment modules to fix the posture of the angle adjustment device. The present invention utilizes the ceiling steel plate, the sliding plate, and the angle adjustment module. The plane position and verticality of the jack can be adjusted in one device, thereby improving construction efficiency and jacking safety, reducing construction difficulty and construction cost, and having a simple structure and low cost.

Description

Technical Field

[0001] The invention belongs to the field of bridge jacking construction, and in particular relates to a bridge slope-adjusting jacking device and a construction method thereof. Background Art

[0002] In bridge jacking construction, it is often necessary to carry out variable slope jacking construction on the bridge. When adjusting the slope for jacking, the jack is initially installed perpendicular to the jacking support. As the slope of the jacking beam changes, if the jacking position of the beam remains unchanged, the jack will move with the rotation of the beam, which will cause two problems. First, Figure 1 As shown in the figure, the slope adjustment jacking will cause the horizontal projection of the beam to extend, and the jack will move with the beam toward the lower slope, but the jacking support under the jack will not move, which will cause the jack to be eccentric and lose balance. On the other hand, Figure 2 As shown in the figure, as the slope of the beam changes, the jack will tilt, lose its initial vertical state with the jacking support and become tilted. The eccentricity and tilt of the jack are not allowed in the jacking process. If they are not adjusted in place, they will cause great hidden dangers to the safety of jacking and affect the accuracy of jacking.

[0003] In the past, the verticality of the jack was adjusted by inserting a wedge-shaped steel plate between the ceiling steel plate and the bottom of the beam. Figure 3 If there are too many wedge-shaped steel plates, the compression between the steel plates cannot be controlled. In addition, the wedge-shaped steel plates usually have an accuracy of 1mm to 4mm. If the processing accuracy is insufficient, it is easy to cause the thickness of the filled steel plates to be different. This method also has great safety hazards. When adjusting the slope for jacking, the direction that needs to be adjusted in the early and later stages of jacking may be different. It is necessary to manually fill the steel plates in one direction in multiple jacking strokes, and then pull out the steel plates multiple times until the beam body is jacked to a certain slope, or even fill the wedge-shaped steel plates from the opposite direction. This is not only dangerous, but also inefficient and has high construction costs. Summary of the invention

[0004] In view of the shortcomings or deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a slope-adjusting jacking device and a construction method thereof, which can simultaneously adjust the plane position and verticality of the jack, improve work efficiency and jacking safety, and reduce construction costs.

[0005] In order to solve the above technical problems, the present invention has the following structure:

[0006] The slope-adjusting jacking device comprises a jack arranged above the jacking support, the jack piston is downward, an angle adjustment module is fixed above the jack, the angle adjustment module is fixed to the ceiling steel plate above with a screw, a sliding plate is clamped between the angle adjustment module and the ceiling steel plate, and the ceiling steel plate is fixed to the beam body to be jacked above through the ceiling screw; the sliding plate is not fixed, and the beam body and the ceiling steel plate can slide downward on the slope along the sliding plate relative to the jack; the hole through which the ceiling screw on the ceiling steel plate passes is a waist-shaped adjustment hole, and the length direction of the adjustment hole is consistent with the moving direction of the beam body, and the beam body can slide downward on the slope along the adjustment hole relative to the jack; the angle adjustment module comprises an upper adjustment module and a lower adjustment module, the upper adjustment module is fixed on the ceiling steel plate above, and the lower adjustment module is fixed on On the jack below, the outward sides of the upper adjustment module and the lower adjustment module are flat, and the sides in contact with each other have spherical protrusions, or the lower adjustment module is a flat plate, and connecting pins are set on the line connecting the centers of the spherical protrusions of the upper adjustment module and the lower adjustment module or on the vertical line from the center of the spherical surface to the flat plate. The connecting pins are respectively hinged to the upper adjustment module and the lower adjustment module, and a group of connecting pins are installed on the front and rear sides of the angle adjustment module. Module fixing wedges are inserted on both sides between the upper adjustment module and the lower adjustment module. The module fixing wedge has a wedge-shaped portion, which can be inserted into the gap formed by the spherical surface to prevent the spherical surface of the upper adjustment module and the lower adjustment module from rolling, thereby fixing the posture of the angle adjustment device. When necessary, the module fixing wedge is taken out, and the angle adjustment device can be adjusted to make the jack perpendicular to the jacking support.

[0007] The sliding plate is a polytetrafluoroethylene plate.

[0008] The radii of the spherical protrusions of the upper adjustment module and the lower adjustment module are equal.

[0009] The jacking method of the slope-adjusting jacking device comprises the following steps:

[0010] S1 Initial installation: Calculate the number of slope-adjusting jacking devices required according to the weight of the beam. Add a distribution beam under the construction beam according to the specific conditions of the bridge. Install the slope-adjusting jacking device between the jacking support and the beam to be jacked or the distribution beam. The jack is perpendicular to the jacking support surface. The upper adjustment module and the ceiling steel plate are tilted according to the initial angle of the beam. The module fixed wedge locks the slope-adjusting jacking device in the current position. At this time, the center lines of the beam, ceiling steel plate, sliding plate, angle adjustment module and jack coincide.

[0011] S2 Slope adjustment and lifting: After installation, the piston of the jack extends to start lifting. As the beam rises and the slope changes, the beam, ceiling steel plate and sliding plate slide toward the lower end of the slope for the jack. The horizontal position of the jack remains unchanged, but the jack slowly tilts relative to the lifting support.

[0012] S3 adjusts the position and posture of the jack: after each lifting stroke, pull out the module fixing wedge, release the upper adjustment module and the lower adjustment module, and the upper adjustment module and the lower adjustment module rotate around the pin shaft respectively, and the spherical surfaces roll against each other, and the jack is adjusted to restore to the initial state perpendicular to the lifting support, and at the same time, the beam body, the ceiling steel plate, and the sliding plate are moved to coincide with the center line of the angle adjustment module and the jack, and then the upper adjustment module and the lower adjustment module are fixed with the module fixing wedge. After adjusting the state of the jack, start the next lifting stroke;

[0013] S4 Continue lifting: Repeat steps S2 and S3 to perform subsequent lifting strokes until the building is adjusted and lifted into place.

[0014] S5 jacking is completed: After the jacking is completed, the slope-adjusting jacking device is fixed, and then subsequent construction is carried out. After the subsequent construction is completed, the slope-adjusting jacking device is removed.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The present invention utilizes a ceiling steel plate, a sliding plate and an angle adjustment module, and can adjust the plane position and verticality of the jack in one device, thereby improving construction efficiency and jacking safety, reducing construction difficulty and construction cost, and has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : Background technology Jack eccentric diagram;

[0018] Figure 2 : Background technology Jack tilt diagram;

[0019] Figure 3 : Background technology fills wedge-shaped steel plates to adjust the verticality of the jack;

[0020] Figure 4 : A front view of the slope-adjusting jacking device of the present invention;

[0021] Figure 5 : An embodiment diagram of the angle adjustment module of the slope adjustment and jacking device of the present invention;

[0022] Figure 6 : Construction method diagram of the slope-adjusting jacking device of the present invention. DETAILED DESCRIPTION

[0023] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0024] like Figure 4As shown, the slope-adjusting jacking device includes a jack 1 arranged above the jacking support, the piston of the jack 1 is downward, and an angle adjustment module 2 is fixed above the jack 1. The angle adjustment module 2 is connected to the upper ceiling steel plate 3 with a screw, and a sliding plate 5 is clamped between the angle adjustment module 2 and the ceiling steel plate 3. The sliding plate 5 is not fixed to the upper and lower parts, and the ceiling steel plate 3 is fixed to the upper beam to be jacked by a ceiling screw 4.

[0025] When the beam is adjusted to lift, as the inclination angle of the beam decreases, the horizontal projection of the beam lengthens, and the jack 1 also moves toward the lower end of the slope as the beam lengthens, causing eccentricity with the lifting support. To solve the eccentric displacement problem of the jack 1, the present invention solves it from two aspects. First, the present invention sets an adjustment hole 3a on the ceiling steel plate 3. Figure 4 As shown, the jack 1 is fixed to the bottom of the beam through a ceiling steel plate 3 (with an angle adjustment module in the middle), and the ceiling steel plate 3 and the bottom of the beam are fixed by ceiling screws 4. The holes through which the ceiling screws 4 pass at the four corners of the rectangular ceiling steel plate 3 are set as waist-shaped adjustment holes 3a. The length direction of the adjustment hole 3a is consistent with the moving direction of the beam body. The longer the adjustment hole 3a is, the longer the relative sliding distance is. 2. The present invention is provided with a sliding plate 5. See Figure 4 A sliding plate 5 is clamped between the ceiling steel plate 3 and the angle adjustment module 2. The sliding plate 5 is made of a material with a small friction coefficient to form a sliding surface between the ceiling steel plate 3 and the angle adjustment module 2. The beam body and the ceiling steel plate 3 can slide along the sliding plate 5 relative to the jack 1 toward the bottom of the slope, and the sliding plate 5 is not fixed.

[0026] In the initial installation state, Figure 4 As shown, the center lines of the beam, ceiling steel plate 3, sliding plate 5, angle adjustment module 2, and jack 1 coincide, and the ceiling screw 4 is approximately in the middle of the adjustment hole 3a of the ceiling steel plate 3. When the beam is adjusted and lifted, when the beam slides toward the lower end of the slope due to the elongation of the horizontal projection, the ceiling screw 4 is driven to slide along the waist-shaped adjustment hole 3a on the ceiling steel plate 3 without being restricted by the ceiling steel plate 3, that is, the beam slides a short distance relative to the ceiling steel plate 3 (and the jack below) in the horizontal direction, and the ceiling screw 4 slides toward one end of the adjustment hole 3a with the beam; at the same time, the beam and the ceiling steel plate 3 can also slide toward the lower end of the slope along the sliding plate 5. In this way, only the beam slides with the elongation of the projection, while the jack 1 remains in its original position, so the jack 1 and the lifting support will not be eccentric. However, at this time, the center lines of the beam body, ceiling steel plate 3, sliding plate 5, angle adjustment module 2 and jack 1 do not coincide with each other and are relatively offset, so they need to be adjusted to the initial state after a jacking stroke.

[0027] The ceiling steel plate 3 with the adjustment hole 3a of the present invention can not only play the role of fixing the jack 1, but also help the jack 1 to avoid eccentricity.

[0028] The sliding plate 5 is made of polytetrafluoroethylene plate, which has a small friction coefficient, excellent sliding property, a large elongation ratio, excellent compression resistance, and reliable strength. It can withstand the pressure of the beam body and facilitate the sliding of the beam body, and is very suitable.

[0029] To solve the problem that the jack 1 may tilt as the slope of the beam changes during the lifting process, the present invention provides an angle adjustment module 2 above the jack 1 for adjustment.

[0030] Embodiment 1 of the angle adjustment module 2, see Figure 4 The angle adjustment module 2 includes an upper adjustment module 21 and a lower adjustment module 22. The upper adjustment module 21 is fixed to the upper ceiling steel plate 3 by screws, and the lower adjustment module 22 is fixed to the lower jack 1. The two adjustment modules are flat on the outward side, and have a spherical protrusion on the side in contact with each other. A connecting pin 23 is arranged on the line connecting the centers of the spherical protrusions. The connecting pin 23 is respectively hinged to the longitudinal pin shaft 24 located in the middle of the upper adjustment module 21 and the lower adjustment module 22. A set of connecting pins 23 is installed at each end of the pin shaft 24, i.e., the front and rear sides of the angle adjustment module 2. Figure 6 a), in the initial installation state of the slope-adjusting jacking device, the jack 1 is perpendicular to the jacking support below, the upper adjustment module 21 is inclined at a certain angle in accordance with the initial slope of the beam body, and module fixing wedges 25 are inserted on both sides between the upper adjustment module 21 and the lower adjustment module 22. The module fixing wedge 25 has a wedge-shaped portion, which can be inserted into the gap formed by the spherical surfaces of the two adjustment modules to prevent the spherical surfaces of the upper adjustment module 21 and the lower adjustment module 22 from rolling, thereby fixing the posture of the angle adjustment device in the initial state. During the slope-adjusting jacking process, the slope of the beam changes gradually, and the jack 1 is pulled to tilt, losing the best jacking position perpendicular to the jacking support. Therefore, when a jacking stroke is completed, the module fixing wedge 25 is pulled out to release the upper adjustment module 21 and the lower adjustment module 22. The upper adjustment module 21 and the lower adjustment module 22 rotate around the pin shaft 24 respectively, and the spherical surfaces roll against each other. The jack 1 is adjusted back to its initial state perpendicular to the jacking support, and then the module fixing wedge 25 is inserted to fix the upper and lower adjustment modules 22 before continuing the jacking of the next stroke.

[0031] Optimally, the upper adjustment module 21 and the lower adjustment module 22 of the first embodiment have the same structure, that is, the radius of the spherical raised portion is also equal, which can reduce the difficulty of processing and greatly reduce the processing cost. In addition, the raised portions of the upper adjustment module 21 and the lower adjustment module 22 are symmetrically installed, and the spherical raised portions are in contact with each other in the form of an circumscribed circle, so that the rolling between them is more flexible, and the jack 1 can be adjusted to the initial vertical state under the action of a small external force.

[0032] Embodiment 2 of the angle adjustment module 2, see Figure 5On the basis of the first embodiment, the lower adjustment module 22 is changed into a flat plate, the spherical protrusion of the upper adjustment module 21 contacts the flat plate surface of the lower adjustment module 22, and a connecting pin 23 is set on the vertical line from the center of the spherical protrusion of the upper adjustment module 21 to the flat plate. The connecting pin 23 is hinged to the upper adjustment module 21 and the lower adjustment module 22 respectively. Because the protrusion of the upper adjustment module 21 can still adjust the posture of the upper adjustment module 21 by rolling on the flat plate, the vertical adjustment process of the jack 1 described in the first embodiment can also be realized.

[0033] The lower adjustment module 22 of the second embodiment is easier to manufacture, has a simpler structure and lower cost.

[0034] In the angle adjustment module 2, the spherical surfaces of the upper and lower adjustment modules form different gap sizes on the left and right of the connecting pin 23, and the gap size on the left and right of the connecting pin 23 of the upper adjustment module 21 will also change with the different inclination angles of the beam body. The present invention cleverly uses the wedge-shaped portion of the module fixing wedge 25 to match the spherical curves of the upper and lower adjustment modules 22. No matter how the gap between the upper and lower adjustment modules changes, the same module fixing wedge 25 can play a fixing role, and it is only necessary to adjust the depth of the wedge-shaped portion extending into the gap. Therefore, one module fixing wedge 25 can meet the needs of the entire construction process, simplifying the structure and saving construction costs.

[0035] The above is the structure of the slope-adjusting jacking device of the present invention. The construction method of slope-adjusting jacking using the slope-adjusting jacking device includes the following steps:

[0036] S1 Initial installation: Calculate the number of slope adjustment and lifting devices required according to the weight of the beam. Add a distribution beam 6 under the construction beam according to the specific conditions of the bridge. Figure 6 As shown in a), the slope-adjusting jacking device is installed between the jacking support and the beam to be jacked or the distribution beam 6, the jack 1 is perpendicular to the jacking support surface, the upper adjustment module 21 and the ceiling steel plate 3 are tilted following the initial angle of the beam, and the module fixed wedge 25 locks the slope-adjusting jacking device in the current position, at which time the center lines of the beam, the ceiling steel plate 3, the sliding plate 5, the angle adjustment module 2, and the jack 1 coincide;

[0037] S2 Slope adjustment and lifting: After installation, the piston of jack 1 extends to start the first lifting stroke. Figure 6 a)~b), as the beam body is lifted and the slope changes continuously, the beam body, ceiling steel plate 3, and sliding plate 5 slide toward the lower end of the slope relative to the jack 1, and the horizontal position of the jack 1 remains unchanged, but the jack 1 slowly tilts relative to the lifting support;

[0038] S3 adjusts the position and posture of the jack 1: after each lifting stroke, pulls out the module fixing wedge 25, releases the upper adjustment module 21 and the lower adjustment module 22, and the upper adjustment module 21 and the lower adjustment module 22 rotate around the pin shaft 24 respectively, and the spherical surfaces roll against each other, and the jack 1 is adjusted to restore to the initial state perpendicular to the lifting support, and at the same time, the beam body, the ceiling steel plate 3, and the sliding plate 5 are moved to coincide with the center line of the angle adjustment module 2 and the jack 1, and then the upper adjustment module 21 and the lower adjustment module 22 are fixed with the module fixing wedge 25. After the state of the jack 1 is adjusted, the next lifting stroke is started;

[0039] S4 Continue lifting: Repeat steps S2 and S3 to perform subsequent lifting strokes until the building is adjusted and lifted into place.

[0040] S5 jacking is completed: the slope of the bridge after jacking is completed is set according to actual needs, or the bridge is leveled, or the downhill jacking is changed to uphill. No matter what the state is, the slope-adjusting jacking device is fixed after the jacking is completed, and then the subsequent construction is carried out. After the subsequent construction is completed, the slope-adjusting jacking device is removed.

[0041] From the above construction method, it can be seen that the slope-adjusting jacking device of the present invention can slide horizontally by setting the beam body, the ceiling steel plate 3, and the sliding plate 5 to adapt to the displacement caused by the horizontal projection extension of the beam body, so as to achieve the purpose of not eccentricity between the jack 1 and the jacking support. At the same time, the angle adjustment module 2 of the slope-adjusting jacking device cleverly utilizes the matching characteristics between the spherical surfaces or between the spherical surface and the plane of the upper and lower adjustment modules 22 to simply adjust the tilted jack in the jacking stroke back to the initial vertical state. Therefore, the present invention utilizes the ceiling steel plate 3, the sliding plate 5 and the angle adjustment module 2 to adjust the plane position and verticality of the jack in a set of devices, thereby improving construction efficiency and jacking safety, and reducing construction difficulty and construction cost.

[0042] In summary, the slope-adjusting jacking device of the present invention has the advantages of powerful functions, simple structure and low cost.

[0043] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A slope adjustment jacking device, comprising a jack (1) arranged above a jacking support, characterized in that: The piston of the jack (1) is facing downwards, an angle adjustment module (2) is fixed above the jack (1), the angle adjustment module (2) is fixed to the ceiling steel plate (3) above by means of screws, a sliding plate (5) is clamped between the angle adjustment module (2) and the ceiling steel plate (3), and the ceiling steel plate (3) is fixed to the beam to be lifted above by means of ceiling screws (4); The sliding plate (5) is not fixed, and the beam body and the ceiling steel plate (3) can slide together relative to the jack (1) along the sliding plate (5) toward the bottom of the slope; The hole through which the ceiling screw (4) passes on the ceiling steel plate (3) is a waist-shaped adjustment hole (3a), the length direction of the adjustment hole (3a) is consistent with the moving direction of the beam body, and the beam body can slide downward on the slope along the adjustment hole (3a) relative to the jack (1); The angle adjustment module (2) comprises an upper adjustment module (21) and a lower adjustment module (22), wherein the upper adjustment module (21) is fixed to the upper ceiling steel plate (3), and the lower adjustment module (22) is fixed to the lower jack (1), wherein the upper adjustment module (21) and the lower adjustment module (22) are flat on their outward sides and have spherical protrusions on their mutually contacting sides, or the lower adjustment module (22) is a flat plate, and a connecting pin (23) is provided on a line connecting the spherical centers of the spherical protrusions of the upper adjustment module (21) and the lower adjustment module (22) or on a line perpendicular to the spherical centers of the spherical protrusions of the upper adjustment module (21) and the lower adjustment module (22), and the connecting pin (23) is respectively connected to the The upper adjustment module (21) and the lower adjustment module (22) are hinged, and a group of the connecting pins (23) are respectively installed on the front and rear sides of the angle adjustment module (2). A module fixing wedge (25) is inserted on both sides between the upper adjustment module (21) and the lower adjustment module (22). The module fixing wedge (25) has a wedge-shaped portion and can be inserted into the gap formed by the spherical surface to prevent the spherical surface of the upper adjustment module (21) and the lower adjustment module (22) from rolling, thereby fixing the posture of the angle adjustment device. When necessary, the module fixing wedge (25) is taken out, and the angle adjustment device can be adjusted so that the jack (1) is perpendicular to the lifting support.

2. The slope-adjusting jacking device according to claim 1 is characterized in that: The sliding plate (5) is a polytetrafluoroethylene plate.

3. The slope-adjusting jacking device according to claim 1 is characterized in that: The upper adjustment module (21) and the lower adjustment module (21) The radii of the spherical protrusions of the entire module (22) are equal.

4. The jacking method of the slope-adjusting jacking device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1 Initial installation: The number of slope-adjusting jacking devices of the present invention required is calculated based on the weight of the beam body. A distribution beam (6) can be added under the construction beam body according to the specific conditions of the bridge. The slope-adjusting jacking device is installed between the jacking support and the beam body to be jacked or the distribution beam (6). The jack (1) is perpendicular to the jacking support surface. The upper adjustment module (21) and the ceiling steel plate (3) are tilted following the initial angle of the beam body. The module fixed wedge (25) locks the slope-adjusting jacking device in the current position. At this time, the center lines of the beam body, the ceiling steel plate (3), the sliding plate (5), the angle adjustment module (2), and the jack (1) coincide. S2 Slope adjustment and lifting: After installation is completed, the piston of the jack (1) extends to start lifting. As the beam body is lifted and the slope changes continuously, the beam body, the ceiling steel plate (3), and the sliding plate (5) slide toward the lower end of the slope with respect to the jack (1). The horizontal position of the jack (1) remains unchanged, but the jack (1) slowly tilts relative to the lifting support. S3 adjusts the position and posture of the jack (1): after each lifting stroke is completed, the module fixing wedge (25) is pulled out to release the upper adjustment module (21) and the lower adjustment module (22), and the upper adjustment module (21) and the lower adjustment module (22) are respectively rotated around the pin shaft (24), and the spherical surfaces roll against each other, so that the jack (1) is adjusted to restore to an initial state perpendicular to the lifting support, and at the same time, the beam body, the ceiling steel plate (3), and the sliding plate (5) are moved to coincide with the center line of the angle adjustment module (2) and the jack (1), and then the upper adjustment module (21) and the lower adjustment module (22) are fixed with the module fixing wedge (25). After the state of the jack (1) is adjusted, the next lifting stroke is started; S4 Continue lifting: Repeat steps S2 and S3, and perform subsequent lifting strokes until the building is adjusted and lifted into place. S5 jacking is completed: After the jacking is completed, the slope-adjusting jacking device is fixed, and then subsequent construction is carried out. After the subsequent construction is completed, the slope-adjusting jacking device is removed.

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