Method for controlling verticality of lifting frame

Abstract

The present invention relates to the field of the verticality of lifting frames. Disclosed is a method for controlling the verticality of a lifting frame. The method comprises the following steps: step one, preparing a lifting frame, wherein the lifting frame comprises several supporting units and lifting units; the supporting units are each in the shape of a long rod and are perpendicular to and intersect one another in pairs to form several intersection and overlap areas, and a vertical guide hole is provided in each intersection and overlap area; and each lifting unit comprises a supporting rod, a hollow jack and several telescopic driving members, an adjusting portion being provided on the hollow jack and being supported below the supporting units, the lower end of the supporting rod being buried in a cast section of a pier column, the upper end of the supporting rod sequentially passing through the hollow jack, the adjusting portion and the guide hole, the lower end of each telescopic driving member being hinged to the adjusting portion, and the upper end of an output shaft of each telescopic driving member being hinged to a supporting unit; and step two, when the lifting frame deviates, driving the telescopic driving members to drive the supporting units to move horizontally so that the supporting units return to an initial state, thereby ensuring the verticality of the lifting frame.

Description

A verticality control method for a lifting frame Technical Field

[0001] The present invention relates to the field of verticality of a lifting frame, and in particular to a method for controlling the verticality of a lifting frame. Background Art

[0002] Traditional engineering lifting systems typically use columns and steel pipes on both sides to lift the pier formwork. However, the verticality of the formwork and the lifting frame is not carefully controlled during the lifting process. If the lifting frame deviates due to force majeure and the construction crew is unaware of it, continuing the lifting process along the original path may cause some deviation, leading to problems such as misalignment during pouring.

[0003] In the prior art, the verticality control method of the lifting frame is usually to control the synchronous lifting of the jacks, so as to prevent the lifting frame from tilting due to uneven lifting height and then offsetting. However, in actual operation, the offset is often not discovered in time after it occurs, so that the lifting frame offsets in the tilting direction. The lifting frame cannot be returned to the initial horizontal position by only adjusting the jacks vertically, and the verticality after adjustment cannot be fully guaranteed. Summary of the Invention

[0004] The present invention aims to provide a method for controlling the verticality of a lifting frame to ensure the verticality of the lifting frame.

[0005] To achieve the above object, the present invention adopts the following technical solution: a method for controlling the verticality of a lifting frame, comprising the following steps:

[0006] Step 1: Prepare the lifting frame. The lifting frame includes several support units and lifting units. The support units are all long rods. The support units are vertically crossed in pairs to form several overlapping areas. Vertical guide holes are provided in the overlapping areas. Each lifting unit includes a support rod, a through-type jack and several telescopic drive members. The through-type jack is provided with an adjustment part, which is supported under the support unit. The lower end of the support rod is buried in the cast section of the pier column. The upper end of the support rod passes through the through-type jack, the adjustment part and the guide hole in sequence. The lower end of the telescopic drive member is hinged to the adjustment part, and the upper end of the output shaft of the telescopic drive member is hinged to the support unit.

[0007] Step 2: When the lifting frame is horizontally offset, the telescopic drive member is extended in the opposite direction of the offset, and is shortened in the offset direction. The telescopic drive members in other directions are driven for fine adjustment, thereby driving the support unit to move horizontally and returning the support unit to its initial state.

[0008] The beneficial effects of this program are:

[0009] When the lifting frame deflects, it is usually because the through-type jacks are not lifted synchronously. However, if the lifting frame continues to lift after the deflection, the deflection of the lifting frame will gradually increase. At this time, even if the height of the through-type jacks is resynchronized, only the vertical position of the lifting frame can be adjusted. The horizontal deflection of the lifting frame is difficult to compensate. If manual prying is performed in the horizontal direction, it is not only inconvenient to control the prying direction and inefficient, but it is also easy to increase the internal force of the lifting frame, causing deformation.

[0010] In this solution, one through-type jack corresponds to one lifting point. According to the length direction of the two adjacent support units, the horizontal offset of each lifting point can be divided into horizontal displacements in two directions, and the horizontal component of the telescopic thrust of the telescopic drive can correct the horizontal displacements in these two directions, thereby accurately adjusting the lifting frame to its initial state.

[0011] 2. The relative position of the support rod and the support unit is limited by the guide hole, reducing the probability of the support unit shifting during the lifting process.

[0012] 3. By vertically crossing each other in pairs, when adjusting the horizontal displacement through the telescopic drive member, the telescopic drive members in two directions are perpendicular to each other and have little influence, thereby greatly reducing the complexity of adjusting the horizontal displacement.

[0013] Furthermore, in step 2, when the lifting frame is torsionally offset, half of the telescopic driving members are driven to extend in a clockwise or counterclockwise direction, and the other half of the telescopic driving members are driven to shorten.

[0014] Furthermore, the support units form a "well"-shaped structure, forming four cross-overlapping areas, each adjustment portion and the two telescopic drive members are hinged at the same height, and the two telescopic drive members are arranged along the length direction of the corresponding support unit and are perpendicular to each other.

[0015] Furthermore, the upper surface of the adjustment part and the lower surface of the support unit are horizontally slidingly connected. The adjustment part is a rectangular shell. The cross-overlapping area and the outer contour of the cross-section of the adjustment part are the same. The cross-overlapping area and the projection of the adjustment part on the horizontal plane overlap. A through hole concentric with the guide hole is provided on the upper and lower sides of the adjustment part respectively. The support rod passes through the two through holes, and the adjustment part and the support rod are rotatably connected.

[0016] Furthermore, in step 2, a method for determining whether the lifting frame is offset is to observe whether the cross-overlapping area between the adjustment portion and the support unit is misaligned.

[0017] Furthermore, in step 2, the direction of the support unit offset is determined by the minimum position of the gap between the support rod and the guide hole.

[0018] Furthermore, the adjustment portion, the through-type jack and the support rod can all be detachably connected.

[0019] Furthermore, the through-type jack can be hinged to the telescopic drive member, and the disassembly method of the adjustment part is as follows:

[0020] a. Disconnect the hinge between the lower end of the telescopic drive member and the adjustment portion, and extend the output shaft of the telescopic drive member;

[0021] b. Articulate the lower end of the telescopic drive member and the through-type jack, continue to extend the output shafts of all telescopic drive members, and lift the support unit upward;

[0022] c. Replace the adjustment part on the through-type jack and shorten the output shaft of the telescopic drive until the adjustment part can support the support unit;

[0023] d. Disconnect the hinge between the lower end of the telescopic drive and the through-type jack, continue to shorten the output shaft of the telescopic drive, and hinge the lower end of the telescopic drive and the adjustment part.

[0024] This solution also has the following effects:

[0025] 1. When the lifting frame is twisted due to factors such as collision, four of the telescopic drive members are driven to extend in a clockwise or counterclockwise direction, and the remaining four telescopic drive members are driven to shorten, thereby driving the lifting frame back to its original position, thereby ensuring the verticality of the lifting frame.

[0026] 2. In the prior art, the through-type jack and the support unit are usually fixedly connected so that the through-type jack can drive the support unit to move upward; if the prior art is applied to this solution, when an offset occurs, the adjustment unit and the support rod will offset together, and when adjusting the horizontal displacement of the support unit, the telescopic drive member can only adjust the support unit, and the support rod still cannot be adjusted to the initial vertical position. This not only increases the internal force at the connection between the through-type jack and the support unit, thereby making the structure more prone to deformation, but also causes the support rod to continue to offset when the lifting frame continues to lift, thereby causing the support structure to offset along with the support rod.

[0027] In the present solution, each lifting point is connected to the support unit through a telescopic drive member. The adjustment part is regarded as a node, and the connection positions of the two telescopic drive members and the support unit are regarded as two nodes. A total of three nodes form a stable plane, which stabilizes the structure of each lifting point, thereby replacing the "fixed connection between the through-type jack and the support unit" in the prior art; when the lifting equipment and the support unit collide or other reasons cause the support unit to shift, the external force is transmitted to the adjustment part through the telescopic drive member, and the adjustment part protects the support rod therein and absorbs the energy transmitted by the external force through surface depression. When the external force generates eccentric force relative to the centroid position of the adjustment part, the adjustment part will also absorb energy through torsion. Since the adjustment part is a shell structure and is rotatably connected to the support rod, no matter it is depression or torsion, as long as it is controlled within a certain range, it will hardly be transmitted to the support rod, thereby reducing the influence of the displacement of the support unit on the support rod.

[0028] 3. When the support unit is offset, since the upper surface of the adjustment part and the lower surface of the support channel steel are horizontally slidingly connected, no internal force will be generated between the upper surface of the adjustment part and the support channel steel, and it is not easy to deform; the adjustment part will absorb energy through depression and torsion, so the horizontal offset of the support unit is significantly greater than the adjustment part. At the same time, the cross-overlapping area of ​​the support unit and the outer contour of the cross-section of the adjustment part are the same, so the misalignment of the adjustment part and the cross-overlapping area can be clearly observed, and then it can be judged that the lifting frame is offset, thereby reminding the workers to correct the deviation in time.

[0029] 4. When, after multiple adjustments, the deformation and torsional energy absorption effects of the adjustment part are significantly weaker, disconnect the connection between the lower end of the telescopic drive member and the adjustment part, extend the telescopic drive member, hinge the lower end of the telescopic drive member and the lifting jack, continue to extend all telescopic drive members, lift the support unit upward, remove the adjustment part from the through-type jack, replace it with a new adjustment part, shorten the telescopic drive member, transfer the support position from the telescopic drive member to the new adjustment part, and re-hinged the lower end of the telescopic drive member to the adjustment part.

[0030] 5. Since the support rod and the guide hole are concentric, when the support unit deviates, the spacing between the support rod and the guide hole is no longer uniform, so the direction of the support unit deviation is determined by the minimum position of the gap between the support rod and the guide hole.

[0031] Furthermore, the lifting frame also includes a template and a plurality of lifting units, each of which includes a horizontal rod, two suspension rods and a limiting member, the limiting member includes a bottom plate and a limiting ring, the bottom plate is connected to the bottom of the support channel steel, the limiting ring is arranged between the two support channel steels, the upper end of the limiting ring protrudes relative to the upper surface of the support channel steel, the horizontal rod passes through the two limiting members and is supported on the support channel steel, the two ends of the horizontal rod are respectively connected to the upper ends of the two suspension rods, and the lower ends of the two suspension rods are connected to the template;

[0032] The template includes several outer molds, each of which is provided with a back rib on the outside, and a diagonal seat at both ends of the back rib. A diagonal rod and two nuts are provided between the diagonal seats of adjacent outer molds, and the two ends of the diagonal rod are threadedly connected to the two nuts after passing through the two diagonal seats; the sides of the outer molds are provided with a reinforcement part, the inner side of the reinforcement part is provided with a beveled surface, and the outer side of the reinforcement part is provided with a horizontal connecting piece. After the adjacent outer molds are vertically spliced, the beveled surfaces of the two reinforcement parts are attached together, and the two horizontal connecting pieces are detachably connected. The reinforcement part is a special-shaped tube with a right-angled triangle cross-section, and the beveled surface is the inclined surface of the right-angled triangle. Several stiffening plates are provided at equal intervals along the length direction inside the reinforcement part;

[0033] The horizontal connecting member includes a vertical connecting plate arranged vertically and a horizontally arranged arc-shaped plate. Both ends of the arc-shaped plate are respectively connected to the outer side of the reinforcement part and the side of the vertical connecting plate. The side of the vertical connecting plate away from the arc-shaped plate is the connecting surface of the two horizontal connecting members. The connecting surface is connected by bolts. The connecting surface and the corresponding oblique surface of the reinforcement part are coplanar. A hollow hole is formed in the middle of the two arc-shaped plates of the two horizontal connecting members, and the hollow hole and the oblique surface are in continuous contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a partial enlarged view of the lifting frame of Example 1;

[0035] FIG2 is a three-dimensional axonometric view of the lifting frame of Example 1;

[0036] FIG3 is a top view of Example 1;

[0037] FIG4 is a partial front view of Example 1;

[0038] Figure 5 is an enlarged view of point A in Figure 3;

[0039] FIG6 is a schematic diagram of the cross-overlapping area at point A in FIG3 ;

[0040] FIG7 is a cross-sectional view of the adjustment portion of Example 1;

[0041] FIG8 is a three-dimensional axonometric view of the template of Example 3;

[0042] FIG9 is a three-dimensional isometric view of the reinforcement portion of Example 3;

[0043] FIG10 is a diagram showing the internal structure of the reinforcement portion of Example 3 after the chamfered surface is hidden;

[0044] FIG11 is a three-dimensional isometric view of the horizontal connector of Example 3;

[0045] FIG12 is a three-dimensional isometric view of the vertical connector of Example 3;

[0046] FIG13 is a top view of the template of Example 3;

[0047] FIG14 is an enlarged view of point B in FIG14 ;

[0048] FIG15 is an enlarged view of a corner point when the template of Example 3 is tilted;

[0049] FIG16 is an enlarged view of a template corner point in the prior art;

[0050] FIG17 is an enlarged view of a corner point of a template when tilted in the prior art;

[0051] FIG18 is an enlarged view of the template corner points, diagonal braces and horizontal connectors of Example 3;

[0052] FIG19 is an enlarged view of the template corner point, the diagonal brace and the horizontal connector of Example 3 when the diagonal brace is fatigued. DETAILED DESCRIPTION

[0053] The following is further described in detail through specific implementation methods:

[0054] The figure marks in the drawings of the specification include: cast section of pier column 1, formwork 2, outer formwork 20, support unit 3, cross-overlap area 31, support channel steel 32, strip gap 33, reinforcement plate 34, support block 35, screw 36, guide hole 37, support rod 4, through-type jack 5, adjustment part 6, ear plate 61, telescopic drive part 62, window 63, diagonal line 64, lifting unit 7, horizontal rod 71, lifting rod 72, limiter 73, bottom plate 74, limit ring 75, vertical connecting part 21, horizontal connecting plate 211, support plate 212, reinforcement part 221, beveled surface 222, stiffening plate 223, back rib 23, inclined seat 231, inclined rod 232, nut 233, horizontal connecting part 24, vertical connecting plate 241, curved plate 242. Example

[0055] Example 1 is basically as shown in Figures 1-7: A method for controlling the verticality of a lifting frame includes the following steps:

[0056] Step 1: Prepare a lifting frame, which includes a template 2, four support units 3 and a lifting unit.

[0057] As shown in Figures 2 and 3, the four support units 3 are all in the shape of long bars, and two of them cross vertically to form a "well"-shaped structure. The projection of the intersection position of two adjacent support units 3 on the horizontal plane forms four cross-overlapping areas 31 as shown in Figure 6. Each support unit 3 includes two parallel support channel steels 32. As shown in Figures 1, 3 and 5, a strip gap 33 is left between the two support channel steels 32. A reinforcing plate 34 is provided above the middle part of the strip gap 33 of the two support units 3 arranged in the left and right directions. The reinforcing plate 34 is welded to the two support channel steels 32 at the same time. As shown in Figures 1 and 3, a number of support blocks 35, screws 36 and connecting nuts are also provided in the strip gap 33. The support block 35 is supported between the two support channel steels 32 to ensure the width of the strip gap 33. The screw 36 passes through the support block 35 and the two support channel steels 32 and is tightened at both ends by the connecting nut. As shown in Figure 5, a guide hole 37 is formed at the intersection and overlap of the two strip gaps 33.

[0058] This solution is suitable for hollow square piers. During the construction of hollow piers, the inner side of the pier needs to be supported and supported. Therefore, lifting equipment is needed to transfer materials directly above the pier, which is prone to collision with the lifting frame and cause the lifting frame to deflect. However, the support unit 3 of this solution has a "well"-shaped structure, leaving the center area empty to facilitate the transfer of materials inside the pier and avoid collision with the lifting equipment.

[0059] As shown in Figures 3 and 5, the support channel steels 32 of the two support units 3 are connected in the cross-overlap area 31 as follows: the support channel steel 32 of one of the support units 3 is used as the main channel steel, corresponding to the channel steel arranged in the up and down direction in Figure 5, and the support channel steel 32 of the other support unit 3 is used as the secondary channel steel, corresponding to the channel steel arranged in the left and right direction in Figure 5. The secondary channel steel is divided into three sections and welded to the main channel steel, so that the three sections of the secondary channel steel are spliced ​​on the first straight line.

[0060] Each lifting unit is respectively arranged in each cross-overlapping area 31, thereby forming four lifting points. Each lifting unit includes a support rod 4, a through-type jack 5 and two telescopic driving parts 62. As shown in Figure 4, the upper side of the through-type jack 5 is bolted with an adjusting part 6, and the adjusting part 6 is supported under the support channel steel 32. The lower end of the support rod 4 is buried in the cast section 1 of the pier column, and the upper end of the support rod 4 passes through the through-type jack 5, the adjusting part 6 and the guide hole 37 in turn. The support rod 4 and the guide hole 37 are concentric. As shown in Figure 5, there is a gap between the support rod 4 and the guide hole 37, and the stiffness of the support rod 4 is greater than that of the adjusting part 6. The through-type jack 5 can climb on the support rod 4, which is an existing technology. As shown in Figures 2 and 4, the lower ends of the two telescopic drive members 62 are hinged to the adjustment part 6 at the same height, and the upper ends of the output shafts of the telescopic drive members 62 are inserted between the two support channel steels 32 of the corresponding support unit 3 and hinged to the two support channel steels 32. In this embodiment, the hinge method is: through more than two objects through a pin and rotatably connected to all objects, the setting directions of the two telescopic drive members 62 are respectively the same as the length direction of a support channel steel 32 and are perpendicular to each other, the telescopic drive members 62 are all jacks, and the output shafts of the telescopic drive members 62 can be extended and shortened.

[0061] The adjusting part 6 is a rectangular shell, and the cross-overlapping area 31 and the adjusting part 6 have the same cross-sectional outer contour and are both rectangular. The cross-overlapping area 31 and the adjusting part 6 overlap in projection on the horizontal plane. The upper surface of the adjusting part 6 and the lower surface of the supporting channel steel 32 of the cross-overlapping area 31 are adhered to and horizontally slidably connected. The upper and lower sides of the adjusting part 6 are respectively provided with a through hole (not shown in the figure) concentric with the guide hole 37, and the support rod 4 passes through the two through holes. The through hole of the adjusting part 6 and the support rod 4 are slidably and rotatably connected. An ear plate 61 is welded on each of the two adjacent side surfaces of the adjusting part 6, and the lower ends of the two telescopic driving members 62 are respectively hinged to one of the ear plates 61, as shown in Figures 2 and 4. Two rectangular windows 63 are respectively provided on the two sides of the adjusting part 6 where the telescopic driving member 62 is not provided, so that the operator can observe the inside of the adjusting part 6 through the window 63.

[0062] As shown in Figure 7, the adjustment part 6 is formed by splicing two components arranged in the center, each component includes two adjacent side surfaces of the adjustment part 6, half of the upper surface separated from the diagonal 64, and half of the lower surface separated from the diagonal 64, and the two components are detachably connected by bolts; as shown in Figure 4, the through-type jack 5 is also bolted to the ear plate 61, where the ear plate 61 can also be hinged to the lower end of the telescopic drive member 62.

[0063] It also includes two lifting units 7, each of which includes a horizontal rod 71, two suspension rods 72 and a limit piece 73. As shown in Figure 4, the limit piece 73 includes a bottom plate 74 and a limit ring 75. The bottom plate 74 is welded to the bottom of the support channel steel 32. The limit ring 75 is arranged between the two support channel steels 32. The lower end of the limit ring 75 is welded to the bottom plate 74. As shown in Figure 1, the upper end of the limit ring 75 protrudes relative to the upper surface of the support channel steel 32. As shown in Figure 3, the horizontal rod 71 is arranged in the left and right directions. The horizontal rod 71 passes through the two limit pieces 73 and is supported on the support channel steel 32. The two ends of the horizontal rod 71 are respectively welded to the upper ends of the two suspension rods 72, and the lower ends of the two suspension rods 72 are bolted to the template 2.

[0064] Step 2: When the lifting frame deviates, the telescopic driving member is driven to drive the support unit to move horizontally, so that the support unit returns to the initial state; after the lifting frame deviates and corrects the deviation multiple times, the adjustment part is replaced.

[0065] Specifically, the method of driving the telescopic drive member is:

[0066] When the lifting frame experiences twisting or deflection, half of the telescopic drive members are extended in a clockwise or counterclockwise direction, while the other half are shortened. For example, as shown in FIG3 , each overlapping region 31 corresponds to two telescopic drive members 62, resulting in a total of eight telescopic drive members 62, numbered ①-⑧. When the lifting frame experiences twisting due to a collision or other factors, taking clockwise twisting as an example, the operator extends four of the odd-numbered telescopic drive members 62 in a counterclockwise direction, i.e., extends the even-numbered telescopic drive members 62, and shortens the remaining four odd-numbered telescopic drive members 62, thereby returning the lifting frame to its original position and ensuring its verticality.

[0067] 2. When the lifting frame is horizontally offset, the horizontal offset of each lifting point can be divided into two directions of horizontal displacement according to the length direction of the two adjacent support units 3. The telescopic drive member is extended in the opposite direction of the horizontal displacement, and the telescopic drive member is shortened in the direction of the horizontal displacement. The telescopic drive members in other directions are driven for fine-tuning, so that the horizontal displacements in these two directions can be corrected by the horizontal component of the telescopic thrust of the telescopic drive member 62, and the lifting frame can be accurately adjusted to its initial state. In this solution, returning to the initial state means that the projection of the object on the horizontal plane is consistent with the initial projection. Since the telescopic drive members 62 in the two directions are perpendicular to each other, they have little influence on each other during adjustment, which greatly reduces the complexity of adjusting the horizontal displacement.

[0068] Specifically, the method for determining whether the lifting frame is offset is as follows:

[0069] When the support unit 3 is offset, since the upper surface of the adjusting part 6 and the lower surface of the supporting channel steel 32 are horizontally slidably connected, no internal force will be generated between the upper surface of the adjusting part 6 and the supporting channel steel 32, and deformation is not easy to occur; and the adjusting part 6 will absorb energy through depression and torsion, so the horizontal offset of the support unit 3 is significantly greater than that of the adjusting part 6. At the same time, the cross-overlapping area 31 of the support unit 3 and the cross-sectional outer contour of the adjusting part 6 are the same, so the misalignment of the adjusting part 6 and the cross-overlapping area 31 can be clearly observed, and then it can be judged that the lifting frame is offset, thereby reminding the workers to correct the deviation in time.

[0070] Specifically, the method for determining the offset direction of the lifting frame is:

[0071] Since the support rod 4 and the guide hole 37 are concentric, when the support unit 3 deviates, the spacing between the support rod 4 and the guide hole 37 is no longer uniform, so the direction of the support unit 3 deviation is determined by the minimum position of the gap between the support rod 4 and the guide hole 37.

[0072] Specifically, the method of replacing the adjustment part is:

[0073] a. Disconnect the hinge between the lower end of the telescopic drive member and the adjustment portion, and extend the output shaft of the telescopic drive member;

[0074] b. Articulate the lower end of the telescopic drive member and the through-type jack, continue to extend the output shafts of all telescopic drive members, and lift the support unit upward;

[0075] c. Replace the adjustment part on the through-type jack and shorten the output shaft of the telescopic drive until the adjustment part can support the support unit;

[0076] d. Disconnect the hinge between the lower end of the telescopic drive and the through-type jack, continue to shorten the output shaft of the telescopic drive, and hinge the lower end of the telescopic drive and the adjustment part.

[0077] The effect of a verticality control method of a lifting frame is as follows:

[0078] 1. In the prior art, the through-type jack 5 and the support unit 3 are usually fixedly connected so that the through-type jack 5 can drive the support unit 3 to move upward; if the prior art is applied to the present solution, when an offset occurs, the adjustment unit and the support rod 4 will offset together, and when adjusting the horizontal displacement of the support unit 3, the telescopic drive member 62 can only adjust the support unit 3, and the support rod 4 still cannot be adjusted to the initial vertical position, which not only increases the internal force at the connection between the through-type jack 5 and the support unit 3, thereby making the structure more prone to deformation, but also causes the support rod 4 to continue to offset when the lifting frame continues to lift, thereby causing the support structure to offset along with the support rod 4.

[0079] In the present solution, each lifting point is connected to the support unit 3 through a telescopic drive member 62. The adjustment part 6 is regarded as a node, and the connection positions of the two telescopic drive members 62 and the support unit 3 are regarded as two nodes. A total of three nodes form a stable plane, which stabilizes the structure of each lifting point, thereby replacing the "fixed connection between the through-type jack 5 and the support unit 3" in the prior art; when the lifting equipment collides with the support unit 3 or other reasons cause the support unit 3 to deviate, the external force is transmitted to the adjustment part 6 through the telescopic drive member 62, and the adjustment part 6 protects the support rod 4 therein and absorbs the energy transmitted by the external force by surface depression. When the external force generates eccentric force relative to the centroid position of the adjustment part 6, the adjustment part 6 will also absorb energy through torsion. Since the adjustment part 6 is a shell structure and is rotatably connected to the support rod 4, no matter it is depression or torsion, as long as it is controlled within a certain range, it will hardly be transmitted to the support rod 4, thereby reducing the influence of the displacement of the support unit 3 on the support rod 4, Example

[0080] Example 2 is based on Example 1, in which an electrically connected inclination sensor and an alarm are provided in the adjusting portion 6. When the inclination sensor senses that the inclination of the adjusting portion 6 exceeds the design value, the alarm will sound an alarm. Example

[0081] Example 3 is basically as shown in Figures 8 to 19, based on Example 1: the formwork 2 includes several inner molds and four outer molds 20, the four outer molds 20 are enclosed on the outside of the rectangular pier, and several back ribs 23 are enclosed on the outside of the outer molds 20. The ends of the back ribs 23 are provided with inclined seats 231. As shown in Figure 11, inclined rods 232 and nuts 233 are provided between adjacent inclined seats 231. The inclined rods 232 pass through the inclined seats 231 and are threadedly connected to the nuts 233, thereby connecting the inclined rods 232 to adjacent back ribs 23.

[0082] As shown in Figures 9 and 10, the right side of the outer mold 20 is the inner side, and each outer mold 20 is integrally formed with a reinforcement part 221 on its left and right sides respectively. The reinforcement part 221 is a special-shaped tube with an isosceles right triangle cross-section arranged vertically. The inclined surface of the right triangle forms an oblique surface 222, and the oblique surface 222 is arranged on the inner side of the reinforcement part 221. After the adjacent sides of the outer mold 20 are vertically spliced, the oblique surfaces 222 of the two reinforcement parts 221 are attached together. The inclination angle of the oblique surface 222 is 45°. The oblique surface 222 is perpendicular to the inclined rod 232, so that the oblique surface 222 is more tightly combined through the inclined rod 232. At the same time, the inclined rod 232 will not generate a component force parallel to the oblique surface 222, thereby avoiding the relative sliding of the two oblique surfaces 222. As shown in FIG10 , a plurality of stiffening plates 223 are provided at equal intervals along the inner length of the reinforcement portion 221 . In this embodiment, the inner side is close to the cast section 1 of the pier column, and the outer side is away from the cast section 1 of the pier column.

[0083] As shown in Figure 11, a horizontal connector 24 is welded to the outside of the reinforcement 221. The horizontal connector 24 comprises a vertical connecting plate 241 and three horizontally arranged curved plates 242. Both ends of the curved plates 242 are welded to the outside of the reinforcement 221 and the side of the vertical connecting plate 241. The side of the vertical connecting plate 241 away from the curved plates 242 serves as the connecting surface of the two horizontal connectors 24. The connecting surfaces of the two horizontal connectors 24 are coplanar with the corresponding chamfered surfaces 222 of the reinforcement 221. After the adjacent sides of the outer mold 20 are vertically spliced, the connecting surfaces of the two horizontal connectors 24 are aligned and bolted together. A hollow hole 243 is formed between the two curved plates 42 of the two horizontal connectors 24, and the hollow hole 243 is in continuous contact with the chamfered surface 22.

[0084] As shown in Figure 12, two vertical connecting parts 21 are welded on the upper and lower sides of the outer mold 20. The vertical connecting parts 21 include a horizontal connecting plate 211 and several vertically arranged triangular support plates 212. The support plates 212 are welded to the outer side of the outer mold 20 and the side of the horizontal connecting plate 211 respectively. When the upper and lower layers of the outer molds 20 are spliced, the horizontal connecting plates 211 of the upper and lower layers of the outer molds 20 are aligned and connected by bolts.

[0085] The method of ensuring the verticality of the lifting frame through template 2 is as follows:

[0086] 1. This embodiment is suitable for slipform construction. The reinforcement portion 221 strengthens the rigidity of the side of the outer form 20 to reduce deformation of the outer form 20 during construction. Therefore, as long as the outer form 20 of the first layer is vertical, as long as the adjacent outer form 20 of the second layer is connected by the horizontal connector 24, the outer form 20 can automatically calibrate its verticality, thereby reducing the deviation of the verticality of the outer form 20 during construction and further reducing the measurement and positioning workload.

[0087] 2. Since the ends of the outer molds 20 are beveled surfaces 222, only two opposite outer molds 20 need to be fixed, and the remaining two outer molds 20 can be aligned with the bolt holes by simply pushing them inward along the beveled surfaces 222, which is convenient and quick, and improves construction efficiency.

[0088] 3. Once the first-layer outer formwork 20 is properly adjusted, the second-layer outer formwork 20 does not require a total station for adjustment. During the bolt tightening process, the vertical connecting plates 241 and horizontal connecting plates 211 drive the two adjacent outer forms 20 to slide simultaneously along the connecting surface, returning the outer forms 20 to the designed vertical position. The verticality of the outer formwork 20 is ensured solely by the vertical connectors 21 and horizontal connectors 24 between the outer forms 20, significantly accelerating the construction of the bridge piers.

[0089] 4. Since the connecting surfaces of the two horizontal connecting members 24 and the corresponding beveled surfaces 222 of the reinforcing portion 221 are coplanar, when the ends of the two outer molds 20 are relatively displaced along the beveled surfaces 222, the bolts on the connecting surfaces are perpendicular to the direction of movement, thereby maximizing the shear resistance of the bolts to prevent the displacement of the beveled surfaces 222.

[0090] 5. During the lifting process, due to the provision of the beveled surface 222, if the lifting frame deflects and drives the outer formwork 20 to tilt, the corner position of the rectangular pier will be misaligned, thereby reminding the construction unit to adjust the offset of the lifting frame in time. The construction unit only needs to repair the surface of the cast pier column. If the repair is not made in time, the tilt of the pier column will be discovered after the construction is completed, which will cause a greater safety hazard and the entire pier will need to be recast, which will be more costly.

[0091] 6. Since the horizontal connectors 24 and the vertical connectors 21 are arranged on the outside of the outer formwork 20, the deformation of the outer formwork 20 caused by uneven force during demoulding during the construction process has little effect on the horizontal connectors 24 and the vertical connectors 21, and thus has little effect on the verticality of the outer formwork 20 in subsequent construction.

[0092] 7. During the construction process, the horizontal connector 24 and the vertical connector 21 mainly play the role of ensuring the verticality of the interior of the formwork 2, and the main force is borne by the beveled surface 222. Under normal circumstances, the corner point position of the outer formwork 20 is shown in Figure 18. However, after repeated use, the beveled surface 222 of the outer formwork 20 will become fatigued and its elasticity will decrease. It is more likely to stretch when subjected to force during the casting of the rectangular pier. Then, as shown in Figure 19, the beveled surfaces 222 of adjacent outer forms 20 cannot be tightly fitted, so that the slurry leaks from between the beveled surfaces 222, thereby reminding the construction personnel that there is a problem with the verticality of the outer formwork 20 and correcting it in time; and because the hollow hole 243 and the beveled surface 222 are in continuous contact, even if leakage occurs during construction, the slurry leaks from between the beveled surfaces 222, and the slurry flows out directly through the hollow hole 243, and the probability of adhering to the horizontal connector 24 is small, thereby avoiding the deformation of the horizontal connector 24 after the slurry solidifies, thereby ensuring the verticality of the outer formwork 20.

[0093] 8. When the lifting frame deviates in a certain direction, the outer mold 20 will be pulled by the suspension rod 72, and the outer mold 20 will then be as shown in Figure 19, so that the chamfered surfaces 222 of adjacent outer molds 20 cannot fit tightly. Similar to the previous step, the slurry leaks from between the chamfered surfaces 222, thereby reminding the construction personnel that the lifting frame is deviating in a certain direction and correcting the deviation in time.

[0094] 9. After multiple lifts, after pouring the bridge pier and removing the outer formwork 20, check for misalignment at the corners of the poured section 1 of the pier column. If the outer formwork 20 has sufficient verticality, the outer formwork 20 will appear as shown in Figures 13 and 14. If the outer formwork 20 has insufficient verticality, the outer formwork 20 will appear as shown in Figure 15, which is prone to misalignment. In the prior art, if the outer formwork 20 has sufficient verticality, the outer formwork 20 will appear as shown in Figure 16; if the outer formwork 20 has insufficient verticality, the outer formwork 20 will appear as shown in Figure 17. Misalignment is unlikely to occur, and therefore, tilting of the outer formwork 20 is not easily detected by the naked eye.

[0095] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A method for controlling the verticality of a lifting frame, characterized in that, The following steps are involved: Step 1: prepare a lifting frame, which includes a plurality of support units and lifting units. The support units are all in the shape of long bars. The support units are vertically crossed in pairs to form a plurality of cross-overlapping areas. Vertical guide holes are arranged in the cross-overlapping areas. Each lifting unit includes a support rod, a through-type jack and a plurality of telescopic driving members. The through-type jack is provided with an adjustment part, which is supported under the support unit. The lower end of the support rod is buried in the cast section of the pier column. The upper end of the support rod passes through the through-type jack, the adjustment part and the guide hole in sequence. The lower end of the telescopic driving member is hinged to the adjustment part, and the upper end of the output shaft of the telescopic driving member is hinged to the support unit. Step 2: When the lifting frame is horizontally offset, the telescopic driving member is extended in the opposite direction of the offset, and is shortened in the offset direction. The telescopic driving members in other directions are driven for fine adjustment, thereby driving the support unit to move horizontally and returning the support unit to its initial state.

2. The verticality control method of a lifting frame according to claim 1, characterized in that, In step 2, when the lifting frame is twisted and offset, half of the telescopic driving members are driven to extend in a clockwise or counterclockwise direction, and the other half of the telescopic driving members are driven to shorten.

3. A verticality control method for a lifting frame according to claim 1, characterized in that: The support units form a "well"-shaped structure, forming four cross-overlapping areas. Each adjustment portion and two telescopic driving members are hinged at the same height. The two telescopic driving members are arranged along the length direction of the corresponding support unit and are perpendicular to each other.

4. A verticality control method for a lifting frame according to claim 3, characterized in that: The upper surface of the adjusting part and the lower surface of the supporting unit are horizontally slidably connected. The adjusting part is a rectangular shell. The cross-overlapping area is the same as the outer contour of the cross-section of the adjusting part. The cross-overlapping area and the projection of the adjusting part on the horizontal plane overlap. A through hole concentric with the guide hole is respectively provided on the upper and lower sides of the adjusting part. The supporting rod passes through the two through holes, and the adjusting part and the supporting rod are rotatably connected.

5. The verticality control method of a lifting frame according to claim 4, characterized in that, In step 2, the method of determining whether the lifting frame is offset is to observe whether the cross-overlapping area of ​​the adjusting portion and the supporting unit is misaligned.

6. A verticality control method for a lifting frame according to claim 4, characterized in that, In step 2, the direction of the support unit offset is determined by the minimum position of the gap between the support rod and the guide hole.

7. A verticality control method for a lifting frame according to claim 4, characterized in that: The adjusting part, the through-type jack and the supporting rod can all be detachably connected.

8. A verticality control method for a lifting frame according to claim 7, characterized in that: The through-type jack can be hinged with the telescopic drive part. The disassembly method of the adjustment part is as follows: a. Disconnect the hinge between the lower end of the telescopic drive member and the adjustment portion, and extend the output shaft of the telescopic drive member; b. Articulate the lower end of the telescopic drive member and the through-type jack, continue to extend the output shafts of all telescopic drive members, and lift the support unit upward; c. Replace the adjustment part on the through-type jack and shorten the output shaft of the telescopic drive until the adjustment part can support the support unit; d. Disconnect the hinge between the lower end of the telescopic drive and the through-type jack, continue to shorten the output shaft of the telescopic drive, and hinge the lower end of the telescopic drive and the adjustment part.

9. A verticality control method for a lifting frame according to claim 8, characterized in that: The lifting frame also includes a template and a plurality of lifting units. Each of the lifting units includes a horizontal rod, two hanging rods and a limiter. The limiter includes a bottom plate and a limiter ring. The bottom plate is connected to the bottom of the supporting channel steel. The limiter ring is arranged between the two supporting channel steels. The upper end of the limiter ring protrudes relative to the upper surface of the supporting channel steel. The horizontal rod passes through the two limiters and is supported on the supporting channel steel. Both ends of the horizontal rod are respectively connected to the upper ends of the two hanging rods, and the lower ends of the two hanging rods are connected to the template. The formwork includes several external formworks. Back ribs are provided on the outer sides of the external formworks. Diagonal tension seats are provided at both ends of the back ribs. A diagonal tension rod and two nuts are provided between the diagonal tension seats of adjacent external formworks. Both ends of the diagonal tension rod pass through the two diagonal tension seats and are threadedly connected to the two nuts. Reinforcing parts are provided on the side edges of the external formworks. An inclined cutting surface is provided on the inner side of the reinforcing part, and a horizontal connecting piece is provided on the outer side of the reinforcing part. After adjacent external formworks are vertically spliced, the inclined cutting surfaces of the two reinforcing parts are attached together, and the two horizontal connecting pieces are detachably connected. The reinforcing part is a special-shaped pipe with a right-angled triangle cross-section, the inclined cutting surface is the inclined surface of a right-angled triangle, and several stiffening plates are equidistantly arranged at equal intervals in the length direction inside the reinforcing part. The horizontal connecting piece includes a vertically arranged vertical connecting plate and a horizontally arranged arc-shaped plate. Both ends of the arc-shaped plate are respectively connected to the outer side of the reinforcing part and the side surface of the vertical connecting plate. The side of the vertical connecting plate away from the arc-shaped plate is the connecting surface of the two horizontal connecting pieces. The connecting surface is connected by bolts, and the connecting surface and the inclined cutting surface of the corresponding reinforcing part are coplanar. A hollow hole is formed between the two arc-shaped plates of the two horizontal connecting pieces, and the hollow hole is in continuous contact with the inclined cutting surface.

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