Temporary hanger point installation system and method

Abstract

The application discloses a temporary lifting point mounting system and method, which comprises a box girder bottom plate, a driving mechanism is suspended above the box girder bottom plate, a lifting point is connected to the output end of the driving mechanism through a lifting assembly, the lifting assembly is movably penetrated through the box girder bottom plate, the lifting point is abutted at the bottom of the box girder bottom plate by driving the lifting assembly, and a locking mechanism for fixing the lifting assembly is further arranged on the box girder bottom plate. Through the mounting of the temporary lifting point, large-tonnage lifting can be realized by cooperating with simple equipment such as a pulley block, the applicability is wider, and the temporary lifting point is not limited by the clearance of the bottom of the box girder; the temporary lifting point is feasible and economical when the support steel pipe pile foundation of the low-clearance box girder or the general box girder is pulled out; compared with the design of the crane cooperating with a vibrating hammer, the application saves the leasing of large lifting machinery and the foundation treatment cost, greatly reduces the construction cost, and avoids the material loss.

Description

TECHNICAL FIELD

[0001] The present application relates to a temporary lifting point technical field, especially to a temporary lifting point installation system and method. BACKGROUND

[0002] In bridge engineering, the design bearing capacity of box girder support bearing steel pipe pile is generally large. Due to the reasons such as pile end soil plug effect and pore water pressure, the steel pipe pile must be pulled out by using large tonnage hoisting equipment assisted by large power vibration hammer. The steel pipe pile foundation used in box girder construction is generally pulled out by using the design of crane combined with vibration hammer. In construction, the bottom of the box girder needs sufficient clearance to meet the requirements of crane boom lifting construction. For low clearance box girder, due to the clearance problem, large hoisting equipment cannot be used during the process of box girder support removal, and the steel pipe pile foundation is difficult to be pulled out. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, one of the purposes of the present application is to provide a temporary lifting point installation system, and the second purpose of the present application is to provide a temporary lifting point installation method, which has wider applicability, is not limited by the clearance of the bottom of the box girder, greatly reduces the construction cost, and avoids the loss of materials.

[0004] One of the purposes of the present application is achieved by adopting the following technical scheme:

[0005] A temporary lifting point installation system comprises a box girder bottom plate, a driving mechanism is suspended above the box girder bottom plate, a lifting assembly is connected to the output end of the driving mechanism through a lifting assembly, the lifting assembly is movably penetrated through the box girder bottom plate, the lifting point is abutted at the bottom of the box girder bottom plate by driving the lifting assembly, and a locking mechanism for fixing the lifting assembly is further arranged on the box girder bottom plate.

[0006] Further, the lifting assembly comprises a pull rope, a pull rod and a limiting pad, the box girder bottom plate has first reserved holes for the pull rope and the pull rod to pass through, one end of the pull rope is connected with the output end of the driving mechanism, the other end of the pull rope is connected with one end of the pull rod, the other end of the pull rod is connected with the lifting point, the limiting pad is sleeved on the rod body of the pull rod, the limiting pad is used for abutting at the bottom of the box girder bottom plate, and the locking mechanism is used for fixing the pull rod on the box girder bottom plate.

[0007] Further, the pull rod has a smooth rod section and a threaded section, the locking mechanism comprises a first support arranged on the box girder bottom plate, the first support has second reserved holes for the pull rope and the pull rod to pass through, the first support is provided with a first nut for the smooth rod section of the pull rod to pass through and capable of being threadedly connected with the threaded section of the pull rod, and the pull rod is fixed on the box girder bottom plate through the first nut and the limiting pad.

[0008] Further, a pad plate for supporting the first support is arranged on the box girder bottom plate, and the pad plate is provided with a third reserved hole for the pull rope and the pull rod to pass through.

[0009] Further, the threaded section of the pull rod extends into the lifting point and is threadedly connected with a second nut for suspending the lifting point.

[0010] The second purpose of the present application is achieved by the following technical scheme:

[0011] A temporary lifting point mounting method, the method comprising:

[0012] A driving mechanism is suspended above the box girder bottom plate, and a lifting assembly capable of moving through the box girder bottom plate is connected to the output end of the driving mechanism;

[0013] The lifting assembly is connected to the lifting point, and the driving mechanism is used to act on the lifting assembly to abut the lifting point against the bottom of the box girder bottom plate;

[0014] When the lifting assembly abuts the lifting point against the bottom of the box girder bottom plate, the lifting assembly is fixed on the box girder bottom plate by the locking mechanism.

[0015] Further, the lifting assembly comprises a pull rope, a pull rod and a limiting pad plate;

[0016] A first reserved hole is formed in the box girder bottom plate for the pull rope and the pull rod to pass through, and one end of the pull rope is connected to the output end of the driving mechanism;

[0017] The other end of the pull rope is connected to one end of the pull rod through the first reserved hole, and the other end of the pull rod is connected to the lifting point;

[0018] The limiting pad plate is sleeved on the rod of the pull rod, and when the driving mechanism lifts the pull rope to drive the pull rod to abut the limiting pad plate against the bottom of the box girder bottom plate, the locking mechanism fixes the pull rod on the box girder bottom plate.

[0019] Further, the pull rod has a smooth rod section and a threaded section, and the locking mechanism comprises a first support arranged on the box girder bottom plate and a first nut arranged on the first support;

[0020] A second reserved hole is formed in the first support for the pull rope and the pull rod to pass through;

[0021] When the driving mechanism lifts the pull rope to drive the pull rod to abut the limiting pad plate against the bottom of the box girder bottom plate, at this time the smooth rod section of the pull rod passes through the second reserved hole and the first nut in turn, and the first nut is tightened downward to fix the pull rod on the box girder bottom plate together with the limiting pad plate.

[0022] Further, the box girder bottom plate is provided with a pad flat plate for supporting the first support, and the pad flat plate is provided with a third reserved hole for the pull rope and the pull rod to pass through.

[0023] Further, the threaded section of the pull rod is extended into the lifting point and is threadedly connected with a second nut for suspending the lifting point.

[0024] Compared with the prior art, the present application has the beneficial effects that:

[0025] Through the installation of the temporary lifting point, large-tonnage lifting can be realized by cooperating with simple equipment such as a pulley block, the applicability is wider, and the box girder bottom clearance is not limited, whether it is a low-clearance box girder or a general box girder, it is feasible and economical when the support steel pipe pile foundation is pulled out, compared with the design of a crane cooperating with a vibrating hammer, the present application saves the rental of large lifting machinery and foundation treatment costs, greatly reduces the construction cost, and avoids material loss. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the installation state of the temporary lifting point installation system and method of the present application;

[0027] Figure 2 It is a schematic diagram of the final installation effect of the temporary lifting point installation system and method of the present application;

[0028] Figure 3 It is Figure 2 It is a schematic diagram of the structure observed from another perspective;

[0029] Figure 4 It is a schematic diagram of the local structure of the temporary lifting point installation system and method of the present application Figure 1 .

[0030] Figure 5 It is a schematic diagram of the local structure of the temporary lifting point installation system and method of the present application Figure 2 .

[0031] In the figure: 10, box girder bottom plate; 20, lifting point; 31, pull rope; 32, pull rod; 33, limiting pad plate; 41, first support; 42, first nut; 50, protective pad plate; 60, pad flat plate; 70, second nut; 80, lifting ring; 90, shackle; 100, pulley block; 111, second support; 112, winch. DETAILED DESCRIPTION

[0032] In the following, the present application will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0033] As Figures 1-5The temporary lifting point installation system shown includes a box girder bottom plate 10, a driving mechanism suspended above the box girder bottom plate 10, a lifting assembly connected to the output end of the driving mechanism, and a lifting point 20 connected to the lifting assembly. The lifting point 20 is connected to the bottom of the box girder bottom plate 10 by driving the lifting assembly, and a locking mechanism is arranged on the box girder bottom plate 10 for fixing the lifting assembly. The low-clearance box girder steel pipe pile removal construction is limited by insufficient clearance, and cannot use conventional design for steel pipe pile removal. The installation of the temporary lifting point can realize large-tonnage lifting conditions by connecting simple equipment such as pulley blocks, and plays a role in replacing large lifting equipment, greatly reducing the construction cost.

[0034] As a preferred embodiment, the lifting assembly includes a pull rope 31, a pull rod 32, and a limiting pad plate 33. The box girder bottom plate 33 has first reserved holes for the pull rope 31 and the pull rod 32 to pass through. One end of the pull rope 31 is connected to the output end of the driving mechanism, and the other end is connected to one end of the pull rod 32. The other end of the pull rod 32 is connected to the lifting point 20. The limiting pad plate 33 is movably sleeved on the rod of the pull rod 32. The limiting pad plate 33 is abutted on the bottom of the box girder bottom plate 10 through the lifting point 20. The locking mechanism is used to fix the pull rod 32 on the box girder bottom plate 10.

[0035] Further preferably, the pull rope 31 is a steel cable, and the diameter of the steel cable is not greater than the diameter of the pull rod 32. The pull rod 32 is made of fine rolled threaded steel. The pull rod 32 has a smooth rod section and a threaded section. A lifting ring 80 is arranged at the top end. The outer diameter of the lifting ring 80 is smaller than the diameter of the pull rod 32. One end of the threaded section of the pull rod 32 extends into the lifting point 20 and is threadedly connected with a second nut 70 for suspending the lifting point 20. The second nut 70 is fixed by tightening with double nuts. The limiting pad plate 33 is a steel pad plate. The limiting pad plate 33 can prevent damage to the bottom surface of the box girder bottom plate 33 when the lifting point 20 rotates upward during installation and construction, thereby affecting the appearance quality.

[0036] As a preferred embodiment, the locking mechanism includes a first support 41 arranged on the box girder bottom plate 10. The first support 41 has second reserved holes for the pull rope 31 and the pull rod 32 to pass through. The first support 41 is provided with a first nut 42 for the smooth rod section of the pull rod 32 to pass through and threadedly connected with the threaded section of the pull rod 32. The pull rod 32 is fixed on the box girder bottom plate 10 by the first nut 42 cooperating with the limiting pad plate 33.

[0037] Further preferably, the first support 41 is processed into a double-spliced I-shaped steel by two I25a I-shaped steels, which is used as a bearing beam. The second reserved holes are cut at the connection of the upper and lower flange plates. The diameter of the second reserved holes is slightly larger than the diameter of the pull rope 31 and the pull rod 32, so that the pull rope 31 and the pull rod 32 can pass through.

[0038] Based on the above structure, a pad plate 60 for supporting the first bracket 41 is provided on the bottom plate 10 of the box girder. The pad plate 60 has a third reserved hole for the pull rope 31 and the tie rod 32 to pass through. Since the concrete surface at the top of the bottom plate 10 of the box girder is uneven, the pad plate 60 can solve the problem of stress concentration caused by uneven contact surface. The pad plate 60 is preferably made of polytetrafluoroethylene board, which has good compressive strength.

[0039] Based on the above structure, a protective pad 50 is provided on the upper surface of the first bracket 41, and a first nut 42 is provided on the protective pad 50. The protective pad 50 has a fourth reserved hole for the pull rope 31 and the pull rod 32 to pass through. The protective pad 50 is preferably a steel pad. The load of the pull rod 32 and the first nut 42 is distributed to the upper surface of the first bracket 41 through the protective pad 50, so as to avoid the first nut 42 generating concentrated stress near the opening of the first bracket 41 during the construction process.

[0040] Based on the above structure, the threaded section of the pull rod 32 extends into the suspension point 20 and is threadedly connected to a second nut 70 for suspending the suspension point 20. The second nut 70 is tightened and fixed by double nuts.

[0041] Based on the above structure, one end of the pull rod 32 is provided with a lifting ring 80 for connecting to the pull rope 31, and the outer diameter of the lifting ring 80 is smaller than the diameter of the pull rod 32.

[0042] Based on the above structure, the lifting point 20 is fixedly connected to the pulley block 100 through the shackle 90, which can realize the conditions for large-tonnage lifting.

[0043] Based on the above structure, the drive mechanism includes a second support 111 set on the bottom plate 10 of the box girder. A winch 112 with a lifting capacity of 1t is set on the second support 111. The second support 111 is made of channel steel and is used as a construction platform for the winch 112.

[0044] like Figures 1-5 A temporary lifting point installation method is shown, the method comprising:

[0045] S1, a drive mechanism is suspended above the bottom plate 10 of the box girder, and a lifting component that can move through the bottom plate 10 of the box girder is connected to the output end of the drive mechanism.

[0046] S3, the lifting component is connected to the lifting point 20, and the driving mechanism is used to lift the component to connect the lifting point 20 to the bottom of the box girder bottom plate 10;

[0047] S3, when the lifting assembly connects the lifting point 20 to the bottom of the box girder bottom plate 10, the lifting assembly is then fixed to the box girder bottom plate 10 by the locking mechanism.

[0048] As a preferred embodiment, in S1, the lifting assembly comprises a pull rope 31, a pull rod 32 and a limiting pad plate 33, and the driving mechanism comprises a second support 111 arranged on the box girder bottom plate 10, and a 1t lifting capacity winch 112 arranged on the second support 111, and the second support 111 is made of channel steel and used as a construction platform of the winch 112;

[0049] Further preferably, the pull rope 31 is a steel cable, and the diameter of the steel cable is not greater than the diameter of the pull rod 32; the pull rod 32 is made of fine rolled threaded steel, and has a smooth rod section and a threaded section, and a lifting ring 80 is arranged at the top end of the pull rod 32, and the outer diameter of the lifting ring 80 is smaller than the diameter of the pull rod 32; the limiting pad plate 33 is a steel pad plate, and the limiting pad plate 33 can prevent damage to the bottom lower surface of the box girder bottom plate 33 when the lifting point 20 rotates upward during installation and tightening and construction, thereby affecting the appearance quality.

[0050] The S1 specifically comprises the following steps:

[0051] S11, before installation or pouring, a first reserved hole for the pull rope 31 and the pull rod 32 to pass through is arranged on the box girder bottom plate 10 by measurement and lofting, and one end of the pull rope 31 is connected with the winch 112;

[0052] S12, the other end of the pull rope 31 is connected with the lifting ring 80 at the top end of the pull rod 32 through the first reserved hole, and the bottom end of the pull rod 32 extends into the lifting point 20 and is threadedly connected with a second nut 70 for suspending the lifting point 20, and the second nut 70 is fixed by double nuts;

[0053] S13, the limiting pad plate 33 is movably sleeved on the rod body of the pull rod 32, and when the winch 112 lifts the pull rope 31 to drive the pull rod 32 to top the limiting pad plate 33 at the bottom of the box girder bottom plate 10 through the lifting point 20, the locking mechanism fixes the pull rod 32 on the box girder bottom plate 10.

[0054] As a preferred embodiment, in S3, the locking mechanism comprises a first support 41 arranged on the box girder bottom plate 10, and a first nut 42 arranged on the first support 41;

[0055] Further preferably, the first support 41 is made of two I25a steel channels which are processed into a double-spliced I channel and used as a bearing beam, and a second reserved hole is cut at the connection of the upper and lower flange plates, and the diameter of the second reserved hole is slightly larger than the diameters of the pull rope 31 and the pull rod 32, so that the pull rope 31 and the pull rod 32 can pass through.

[0056] The S3 specifically comprises the following steps:

[0057] S31, a second reserved hole for the pull rope 31 and the pull rod 32 to pass through is arranged on the first support 41;

[0058] S32, when the winch 112 hoists the pull rope 31 to drive the pull rod 32 to abut the limiting pad plate 33 on the bottom of the box girder bottom plate 10, at this time, the light pole section of the pull rod 32 passes through the second reserved hole and the first nut 42 in turn, and then the first nut 42 is tightened downward, and cooperates with the limiting pad plate 33 to fix the pull rod 32 on the box girder bottom plate 10.

[0059] On the basis of the above method, the box girder bottom plate 10 is provided with a pad plate 60 for supporting the first support 41, and the pad plate 60 has a third reserved hole for the pull rope 31 and the pull rod 32 to pass through. Because the top concrete surface of the box girder bottom plate 10 is not flat, the pad plate 60 can solve the problem of stress concentration caused by uneven contact surface. The pad plate 60 is preferably made of polytetrafluoroethylene plate, which has good compression resistance.

[0060] On the basis of the above method, the upper surface of the first support 41 is provided with a protective pad plate 50, and the first nut 42 is arranged on the protective pad plate 50. The protective pad plate 50 has a fourth reserved hole for the pull rope 31 and the pull rod 32 to pass through. The protective pad plate 50 is preferably a steel pad plate. The load of the pull rod 32 and the first nut 42 is dispersed to the upper surface of the first support 41 through the protective pad plate 50, so as to avoid concentrated stress of the first nut 42 near the opening of the first support 41 during construction.

[0061] On the basis of the above method, the lifting point 20 is fixedly connected with the pulley block 100 through the shackle 90, so as to realize large-tonnage lifting.

[0062] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A method of installing a temporary hanger point installation system, characterized by, The temporary lifting point mounting system comprises a box girder bottom plate and a lifting assembly, a driving mechanism is suspended above the box girder bottom plate, the lifting assembly comprises a pull rope, a pull rod and a limiting pad plate, the box girder bottom plate is provided with first reserved holes for the pull rope and the pull rod to pass through, one end of the pull rope is connected with the output end of the driving mechanism, one end of the pull rod is provided with a lifting ring, the outer diameter of the lifting ring is smaller than the diameter of the pull rod, the other end of the pull rope is connected with the lifting ring on the pull rod through the first reserved holes, the other end of the pull rod is connected with the lifting point, the lifting point is abutted on the bottom of the box girder bottom plate by driving the lifting assembly, the box girder bottom plate is further provided with a locking mechanism for fixing the lifting assembly, the limiting pad plate is sleeved on the rod of the pull rod, the limiting pad plate is used for abutting on the bottom of the box girder bottom plate, and the locking mechanism is used for fixing the pull rod on the box girder bottom plate; the lifting point is fixedly connected with a pulley block through a shackle; the pull rod has a smooth rod section and a threaded section, the locking mechanism comprises a first support provided on the box girder bottom plate, the first support is provided with second reserved holes for the pull rope and the pull rod to pass through, the upper surface of the first support is provided with a protective pad plate, the first support is provided with a first nut for the smooth rod section of the pull rod to pass through and capable of being threadedly connected with the threaded section of the pull rod, the first nut is arranged on the protective pad plate, the protective pad plate is provided with fourth reserved holes for the pull rope and the pull rod to pass through, and the pull rod is fixed on the box girder bottom plate through the first nut and the limiting pad plate; the box girder bottom plate is provided with a pad plate for supporting the first support, and the pad plate is provided with third reserved holes for the pull rope and the pull rod to pass through; The mounting method comprises the following steps: One end of the pull rope is connected with the output end of the driving mechanism; the other end of the pull rope is connected with one end of the pull rod through the first reserved holes, the second reserved holes, the third reserved holes and the fourth reserved holes, and the other end of the pull rod is connected with the lifting point; the limiting pad plate is sleeved on the rod of the pull rod; When the limiting pad plate is abutted on the bottom of the box girder bottom plate by driving the lifting assembly to drive the pull rod through the pull rope, at this time, the smooth rod section of the pull rod passes through the second reserved holes and the first nut in sequence, and then the first nut is screwed down on the protective pad plate, and the pull rod is fixed on the box girder bottom plate in cooperation with the limiting pad plate, so as to abut the lifting point on the bottom of the box girder bottom plate; When the lifting assembly abuts the lifting point on the bottom of the box girder bottom plate, the locking mechanism is used for fixing the pull rod on the box girder bottom plate.

2. The mounting method of claim 1, wherein: The threaded section of the pull rod is extended into the lifting point and is threadedly connected with a second nut for suspending the lifting point.

3. A temporary hanger point installation system obtained by the installation method as claimed in claim 1 or 2, characterized in that: The temporary lifting point mounting system comprises a box girder bottom plate and a lifting assembly, a driving mechanism is suspended above the box girder bottom plate, the lifting assembly comprises a pull rope, a pull rod and a limiting pad plate, the box girder bottom plate is provided with first reserved holes for the pull rope and the pull rod to pass through, one end of the pull rope is connected with an output end of the driving mechanism, one end of the pull rod is provided with a lifting ring, the outer diameter of the lifting ring is smaller than the diameter of the pull rod, the other end of the pull rope passes through the first reserved holes and is connected with the lifting ring on the pull rod, the other end of the pull rod is connected with a lifting point, the lifting point is abutted at the bottom of the box girder bottom plate by driving the lifting assembly, the box girder bottom plate is further provided with a locking mechanism for fixing the lifting assembly, the limiting pad plate is sleeved on the pull rod, the limiting pad plate is used for abutting at the bottom of the box girder bottom plate, and the locking mechanism is used for fixing the pull rod on the box girder bottom plate; the lifting point is fixedly connected with a pulley block through a shackle; the pull rod has a smooth rod section and a threaded section, the locking mechanism comprises a first support provided on the box girder bottom plate, the first support is provided with second reserved holes for the pull rope and the pull rod to pass through, an upper surface of the first support is provided with a protective pad plate, the first support is provided with a first nut for the smooth rod section of the pull rod to pass through and be threadedly connected with the threaded section of the pull rod, the first nut is arranged on the protective pad plate, the protective pad plate is provided with fourth reserved holes for the pull rope and the pull rod to pass through, and the pull rod is fixed on the box girder bottom plate through cooperation of the first nut and the limiting pad plate; the box girder bottom plate is provided with a pad plate for supporting the first support, and the pad plate is provided with third reserved holes for the pull rope and the pull rod to pass through.

4. The temporary hanger installation system of claim 3, wherein: The threaded section of the pull rod extends into the lifting point and is threadedly connected with a second nut for suspending the lifting point.

5. The temporary hanger installation system of claim 3, wherein: The driving mechanism comprises a second support arranged on the box girder bottom plate, the second support is provided with a winch with a lifting capacity of 1t, and the second support is made of a channel steel and used as a construction platform of the winch.

Images