CN114934448A - Dismantling device and system for box girder formwork supporting system and construction method - Google Patents

Abstract

A dismantling device, a dismantling system and a construction method of a box girder template support system relate to the technical field of bridge construction. The box girder is arranged on the top surface of the formwork support system, the balance beam is arranged on the top surface of the box girder, the hoisting equipment is arranged on the top surface of the balance beam, the steel strand bundle sequentially penetrates through the formwork support system, the box girder, the balance beam and the hoisting equipment along the height direction of the box girder, the hoisting equipment can drive the steel strand bundle to move along the penetrating direction of the steel strand bundle, and the bottom of the steel strand bundle is anchored at the bottom of the formwork support system through the anchoring device. The hoisting equipment is used for controlling the steel strand bundle to be lifted and the lower part of the steel strand bundle, so that the whole formwork supporting system is placed on the ground to be dismantled. The embodiment of the application can realize that the whole formwork support system falls to the ground and is dismantled, and the dismantling operation is convenient, thereby improving the construction efficiency.

Description

A dismantling device, system and construction method for a box girder formwork support system

technical field

The present application relates to the technical field of bridge construction, and in particular, to a dismantling device, system and construction method for a box girder formwork support system.

Background technique

With the development of bridge construction, in the construction of the cast-in-place box girder of the bridge, the steel tube column beam formwork support system is often widely used as a temporary structure, and its demolition is also an important process in the bridge construction process. In the related art, the dismantling process of the formwork support system often adopts a top-to-bottom dismantling method. Since the formwork support system is limited by the beam body built above and the steel tube column support frame below, the dismantling operation is difficult and the construction efficiency is reduced.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a dismantling device, system and construction method for a box girder formwork support system, so as to solve the problems of difficulty in dismantling the formwork support system and low construction efficiency.

A dismantling device for a box girder formwork support system, comprising:

a balance beam, which is arranged horizontally, and the balance beam has a through hole penetrating along its height direction;

Lifting equipment, which is arranged on the top surface of the balance beam;

The steel strand bundle penetrates through the through hole of the balance beam and the lifting device along the height direction of the balance beam, and the lifting device can drive the steel strand bundle to move along the through direction thereof, and the An anchoring device is attached to the bottom.

Further, the dismantling device further includes a support beam, the support beam is inclined relative to the lifting equipment, and one end of the support beam is connected to the lifting equipment.

Further, the end surface of the free end of the support beam is flush with the bottom surface of the balance beam.

Further, the anchoring device includes an anchor plate and an anchor head for fastening, the bottom of the steel strand runs through the anchor plate, and is fastened to the anchor plate through the anchor head.

Also provided is a box girder formwork support system, which includes:

formwork support system;

a box girder, arranged on the top surface of the formwork support system;

And a removal device, the removal device includes:

a balance beam, which extends horizontally along the longitudinal bridge direction, and the balance beam is arranged on the top surface of the box girder;

Lifting equipment, which is arranged on the top surface of the balance beam;

A steel strand bundle that runs through the formwork support system, the box girder, the balance beam, and the lifting device in sequence along the height direction of the box girder, and the lifting device can drive the steel strand bundle along its Moving in the running direction, the bottom of the steel strand bundle penetrates out of the formwork support system, and is anchored to the bottom of the formwork support system through the anchoring device.

Further, the dismantling device further includes a support beam, the support beam is inclined relative to the lifting equipment, and one end of the support beam is connected to the lifting equipment, and the other end is connected to the top surface of the box beam .

Further, each of the lifting equipment is connected with two support beams, and the two support beams are symmetrically distributed on opposite sides of the lifting equipment.

Also a construction method of the dismantling device based on the above-mentioned box girder formwork support system, comprising:

Install the balance beam on the top surface of the box girder, and install the lifting equipment on the top surface of the balance beam;

Install the steel strand bundle vertically, so that the steel strand bundle runs through the formwork support system, box girder, balance beam and lifting equipment in sequence, and the bottom of the steel strand bundle runs through the formwork support system;

Install the anchoring device at the bottom of the steel strand bundle to anchor the steel strand bundle to the bottom of the formwork support system;

The steel strand bundle is driven down by the lifting equipment, and the formwork support system is lowered and removed.

Further, the vertical installation of the steel strand bundles so that the steel strand bundles pass through the formwork support system, the box girder, the balance beam and the lifting equipment in sequence, and the bottom of the steel strand bundles penetrate the formwork support system also includes:

A support beam is arranged on the top surface of the box girder, so that one end of the support beam is connected to the lifting equipment, and the other end is connected to the top surface of the box girder.

Further, the lowering of the steel strand bundle by driving the hoisting equipment, and the lowering and removal of the formwork support system further include:

The steel strand bundle is driven up by the lifting equipment, the anchoring device is pressed against the formwork support system, and the sand box and steel pipe column below the formwork support system are removed;

The steel strand bundle is driven down by the lifting equipment, and the formwork support system is lowered to the ground as a whole and removed.

The beneficial effects brought by the technical solution provided by this application include:

Embodiments of the present application provide a dismantling device, system, and construction method for a box girder formwork support system, wherein the dismantling device for the box girder formwork support system includes a steel strand harness, a balance beam, and lifting equipment, and the box girder formwork support system system Including formwork support system, box girder and dismantling device, the steel strand bundle runs through the formwork support system, box girder, balance beam and lifting equipment at the same time. Tighten the formwork support system, and remove the sand box and steel pipe column below the formwork support system. Then, the steel strand bundle is driven down by the lifting equipment, and the formwork support system is lowered to the ground as a whole, and the demolition operation is carried out. The embodiment of the present application can realize the overall ground dismantling of the formwork support system, and the dismantling operation is not limited by the site and machinery, which speeds up the construction progress, improves the construction efficiency, and ensures the construction safety.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of the overall structure of a dismantling device according to an embodiment of the present application;

Fig. 2 is the longitudinal bridge schematic diagram of the box girder formwork support system system according to the embodiment of the present application;

Fig. 3 is the cross-bridge structural schematic diagram of the dismantling device in Fig. 2 being installed on the flange portion of the box girder;

FIG. 4 is a schematic diagram of a transverse bridge structure in which the dismantling device in FIG. 2 is installed in the middle of the box girder.

Reference number:

1. Steel strand bundle; 2. Balance beam; 3. Lifting equipment; 4. Support beam; 5. Box beam; 51. Middle part; 52. Flange part; 6. Anchoring device; 61. Anchor plate; Anchor head; 7. Formwork support system; 71. Middle formwork support system; 711, Middle bottom beam; 712, Middle support frame; 713, Middle distribution beam; 714, Middle bottom formwork, 72, Flange part formwork support system; 721 722, flange support frame; 723, middle distribution beam; 724, flange bent frame; 725, flange bottom mold; 8, sand box; 9, steel pipe column; 10, bridge pier.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

The embodiments of the present application provide a dismantling device, system and construction method for a box girder formwork support system, which can solve the problems of difficulty in dismantling the formwork support system and low construction efficiency.

As shown in FIG. 1 , a dismantling device for a box girder formwork support system includes a balance beam 2 , a lifting device 3 and a steel strand bundle 1 .

Among them, the balance beam 2 is arranged horizontally, and the balance beam 2 has a through hole penetrating along the height direction thereof. The lifting equipment is arranged on the top surface of the balance beam 2 . The steel strand bundle penetrates through the through hole of the balance beam 2 and the lifting device 3 along the height direction of the balance beam 2, and the lifting device 3 can drive the steel strand bundle 1 to move along its penetration direction, and the bottom of the steel strand bundle 1 is connected with an anchorage device 6.

Specifically, in the embodiment of the present application, the lifting device 3 is a hydraulic jack, the hydraulic jack is connected to the computer, and the lifting and lowering of the steel strand bundle 1 are intelligently controlled by the computer. In other embodiments, the lifting device 3 may be a chain hoist, a hoist and the like. The above steel strand bundle 1 is a high-strength and low-relaxation prestressed steel strand bundle with high strength, and the number of the steel strand bundle 1 is determined according to the actual stress condition.

Specifically, the top area of the balance beam 2 should be greater than or equal to the bottom area of the hoisting equipment 3 to facilitate the installation of the hoisting equipment 3 and the transfer of the load. In the embodiment of the present application, the balance beam 2 is made of I-beam splicing, and is fixed to a preset installation position on the top surface of the box girder 5. The preset installation position can be set according to the actual situation. In other embodiments, the balance beam 2 The beam 2 can also use angle steel, round steel and so on.

Further, the dismantling device of the present application also includes a support beam 4, the support beam 4 is inclined relative to the lifting device 3, and one end of the support beam 4 is connected to the lifting device 3, specifically, one end of the support beam 4 is connected to the lifting device 3. Side wall of heavy equipment 3.

Specifically, the support beam 4 can strengthen and stabilize the lifting equipment 3. When the dismantling device of the present application is arranged on the box beam 5, one end of the support beam 4 is connected to the lifting equipment 3, and the other end is connected to the box The top surface of the beam 5 forms a stable triangle, which ensures the stability of the lifting device 3 .

Specifically, in the embodiment of the present application, the number of support beams 4 is two, which are respectively connected to opposite sides of the lifting device 3, so that the lifting device 3 is evenly stressed and will not tip over. In other embodiments, the number of support beams 4 can be set according to the case. Preferably, when the number of support beams 4 is multiple, the multiple support beams 4 are evenly connected to the lifting equipment 3 to ensure that the lifting equipment 3 is evenly stressed.

Specifically, the support beam 4 and the lifting equipment 3 are in surface-to-surface contact or line-to-surface contact to ensure sufficient contact between the support beam 4 and the lifting device 3 , thereby ensuring the firmness of the connection between the support beam 4 and the lifting device 3 .

Further, the end surface of the free end of the support beam 4 is flush with the bottom surface of the balance beam 2, which facilitates the connection and installation of the dismantling device of the present application with other structures.

Further, the anchoring device 6 includes an anchor plate 61 and an anchor head 62 for fastening. The bottom of the steel strand bundle 1 penetrates out of the anchor plate 61 and is fastened to the anchor plate 61 through the anchor head 62 .

Specifically, the anchor plate 61 is located above the anchor head 62, and the bottom area of the anchor plate 61 should be larger than the top area of the anchor head 62, so that the anchor head 62 can fully play an anchoring role.

As shown in FIG. 2 to FIG. 4 , the embodiment of the present application further provides a box girder formwork support system system, which includes a box girder 5, a formwork support system 7 and a dismantling device, wherein the dismantling device includes a balance beam 2, a lifting device 3 and strand bundle 1.

The box girder 5 is arranged on the top surface of the formwork support system 7 , the balance beam 2 extends horizontally along the longitudinal bridge direction, and the balance beam 2 is arranged on the top surface of the box girder 5 . The lifting device 3 is arranged on the top surface of the balance beam 2 . The steel strand bundle 1 runs through the formwork support system 7, the box girder 5, the balance beam 2 and the lifting equipment 3 in sequence along the height direction of the box girder 5. The lifting equipment 3 can drive the steel strand bundle 1 to move along its running direction, and the steel strands The bottom of the wire harness 1 penetrates out of the formwork support system 7 and is anchored to the bottom of the formwork support system 7 through the anchoring device 6 .

Specifically, in the embodiment of the present application, the end of the box girder 5 is erected on the top end of the bridge pier 10 . The formwork support system 7 is located between two adjacent bridge piers 10 and is supported below the box girder 5 . The hoisting equipment 3 transmits the load to the box girder 5 through the balance beam 2, and the balance beam 2 increases the load transmission area to avoid the box girder 5 being damaged by the concentrated load. The top area of the balance beam 2 should be greater than or equal to the bottom area of the hoisting equipment 3, which is convenient for the installation of the hoisting equipment 3 and the transmission of the acting force.

Specifically, in the embodiment of the present application, the lifting device 3 is a hydraulic jack, the hydraulic jack is connected to the computer, and the lifting and lowering of the steel strand bundle 1 are intelligently controlled by the computer. In other embodiments, the lifting device 3 may be a chain hoist, a hoist and the like. The above-mentioned steel strand bundle 1 is a prestressed steel strand bundle with high strength.

Further, the above-mentioned dismantling device further includes a support beam 4 . The support beam 4 is inclined relative to the lifting equipment 3 , and one end of the support beam 4 is connected to the lifting equipment 3 and the other end is connected to the top surface of the box beam 5 .

Specifically, the support beam 4 can strengthen and stabilize the lifting equipment 3. One end of the support beam 4 is connected to the lifting equipment 3, and the other end is connected to the top surface of the box beam 5 to form a stable triangle, which ensures the Stability of lifting equipment 3.

Specifically, the support beam 4 and the lifting equipment 3 are in surface-to-surface contact or line-to-surface contact to ensure sufficient contact between the support beam 4 and the lifting device 3 , thereby ensuring the firmness of the connection between the support beam 4 and the lifting device 3 .

Further, each lifting device 3 is connected with two supporting beams 4 , and the two supporting beams 4 are symmetrically distributed on opposite sides of the lifting device 3 .

Specifically, in the embodiment of the present application, the number of support beams 4 is two, and the two support beams 4 are connected to opposite sides of the lifting equipment 3 along the transverse bridge direction, so that the lifting equipment 3 is evenly stressed and does not dump. In other embodiments, the number of support beams 4 can be set according to the case. Preferably, when the number of support beams 4 is multiple, the multiple support beams 4 are evenly connected to the side walls of the lifting equipment 3 to ensure that the lifting equipment 3 is uniformly stressed.

Further, the anchoring device 6 includes an anchor plate 61 and an anchor head 62 for fastening. The bottom of the steel strand bundle 1 penetrates out of the anchor plate 61 and is fastened to the anchor plate 61 through the anchor head 62 .

Specifically, the anchor plate 61 is located above the anchor head 62, and the bottom area of the anchor plate 61 should be larger than the top area of the anchor head 62, so that the anchor head 62 can fully play an anchoring role.

Further, as shown in FIGS. 3 and 4 , the box girder 5 includes a middle portion 51 and flange portions 52 located on both sides of the middle portion 51 along the transverse bridge direction. a removal device.

Specifically, in the embodiment of the present application, the bottom surface of the middle part 51 of the box girder 5 is horizontal, and the bottom surface of the flange part 52 of the box girder 5 is inclined upward from the inside to the outside. Therefore, the structure of the middle part 51 and the flange part 52 is The form, weight, etc. are not the same. At least one dismantling device is provided on the top surface of the middle portion 51 and each flange portion 52, that is, the middle portion 51 and the two flange portions 52 are dismantled through different dismantling devices respectively, so as to ensure that the box girder 5 is in the Overall stability and safety in demolition works.

Specifically, when the number of dismantling devices arranged in the middle part 51 is one, the dismantling device is located at the center of the middle part 51; when the number of dismantling devices arranged in the middle part 51 is multiple, the multiple dismantling devices are evenly arranged to ensure the box The middle portion 51 of the beam 5 is uniformly stressed during the dismantling process, thereby ensuring the stability and safety of the middle portion 51 of the box beam 5 . At the same time, the dismantling devices disposed on the two flange portions 52 are symmetrically arranged to ensure that the entire box girder 5 is uniformly stressed during the dismantling project, thereby ensuring the overall stability and safety of the box girder 5 .

Further, the formwork support system 7 includes a middle support system 71 supported under the middle portion 51 of the box girder 5 and a flange portion support system 72 supported under the flange portion 52 of the box girder 5 .

Specifically, the middle support system 71 includes a middle bottom beam 711 , a middle support frame 712 , a middle distribution beam 713 and a middle bottom mold 714 . Among them, the middle bottom beam 711 is located on the top surface of the sand box 8, the middle support frame 712 is supported on the top surface of the middle bottom beam 711, the middle distribution beam 713 is located on the top surface of the middle support frame 712, and the middle distribution beam 713 is located along the horizontal bridge. The middle bottom mold 714 is located between the middle part 51 of the box girder 5 and the middle distribution beam 713 , and the middle bottom mold 712 is arranged on the bottom surface of the middle part 51 of the box girder 5 .

Specifically, the flange part formwork support system 72 includes a flange bottom beam 721 , a flange support frame 722 , a flange distribution beam 723 , a flange bent frame 724 and a flange bottom mold 725 . Wherein, the flange bottom beam 721 is located on the top surface of the flask 8, the flange support frame 722 is supported on the top surface of the flange bottom beam 711, and the flange support frame 723 extends along the middle support frame 713 in the transverse bridge direction Direction erection, the flange distribution beam 723 is located on the top surface of the flange support frame 723, and the flange distribution beam 723 is arranged along the extension direction of the middle distribution beam 713, and the flange bent frame 724 is supported on the top of the flange distribution beam 723. The flange bottom mold 725 is located between the flange portion 52 of the box girder 5 and the flange distribution beam 723 , and the flange bottom mold 725 is provided on the bottom surface of the flange portion 52 of the box girder 5 .

The middle distribution beam 713 and the flange distribution beam 723 can be aligned at their ends and arranged along the transverse bridge direction. The above-mentioned middle bottom beam 711 and the flange bottom beam 721 can be made of I-beam, and the above-mentioned middle bottom beam 711, middle support frame 712, middle distribution beam 713, middle bottom mold 714, flange bottom beam 721, flange support The frame 722 , the flange distribution beam 723 , the flange bent frame 724 and the flange bottom mold 725 are all reserved with holes for the steel strand bundle 1 to pass through.

Specifically, in this embodiment, a flask 8 and a steel pipe upright 9 are further provided below the formwork support system 7, and the flask 8 and the steel pipe upright 9 play a supporting role for the formwork support system 7, and the flask 8 can ensure the formwork The stability of the support system 7. The number of the steel pipe uprights 9 may be one or more, the number of the flasks 8 is the same as the number of the steel pipe uprights 9 , and a flask 8 is provided at the top of the steel pipe uprights 9 .

The embodiment of the present application also provides a construction method of the dismantling device based on the above-mentioned box girder formwork support system, which comprises the following steps:

Step 1: Install the balance beam 2 on the top surface of the box beam 5, and install the lifting equipment 3 on the top surface of the balance beam 2.

Step 2: Install the steel strand bundle 1 vertically, so that the steel strand bundle 1 passes through the formwork support system 7, the box girder 5, the balance beam 2 and the lifting equipment 3 in sequence, and the bottom of the steel strand bundle 1 penetrates out of the formwork support system 7 .

Step 3: An anchoring device 6 is installed at the bottom of the steel strand bundle 1 to anchor the steel strand bundle 1 to the bottom of the formwork support system 7 .

Step 4: The steel strand bundle 1 is driven down by the lifting device 3, and the formwork support system 7 is lowered and removed.

Specifically, the box girder 5 includes a middle portion 51 and flange portions 52 located on both sides of the middle portion 51 along the transverse bridge direction. That is to say, the middle part 51 and the two flange parts 52 are dismantled by different dismantling devices respectively, so as to ensure the overall stability and safety of the box girder 5 in the dismantling project. In the embodiment of the present application, the middle portion 51 of the box girder 5 is provided with two removal devices, and each flange portion 52 is provided with two removal devices.

Specifically, during the construction of the box girder 5, holes need to be reserved at corresponding positions, so that the steel strand bundle 1 can pass through the reserved holes.

Specifically, in other embodiments, when the number of removal devices provided in the middle portion 51 is one, the removal device is located at the center of the middle portion 51 , and when the number of removal devices provided in the middle portion 51 is multiple, multiple removal devices are removed. The devices are preferably arranged uniformly to ensure that the middle portion 51 of the box girder 5 is uniformly stressed during the dismantling process, thereby ensuring the stability and safety of the middle portion 51 of the box girder 5 . At the same time, the dismantling devices disposed on the two flange portions 52 are symmetrically arranged to ensure that the entire box girder 5 is uniformly stressed during the dismantling project, thereby ensuring the overall stability and safety of the box girder 5 .

Further, the above step 2 further includes: disposing a support beam 4 on the top surface of the box beam 5 , so that one end of the support beam 4 is connected to the lifting equipment 3 , and the other end is connected to the top surface of the box beam 5 .

Specifically, in the embodiment of the present application, each hoisting device 3 is connected with two supporting beams 4, and the two supporting beams 4 are connected to opposite sides of the hoisting device 3 along the longitudinal bridge direction, so that the hoisting device 3 is subjected to The force is even and will not tip over. In other embodiments, the number of support beams 4 can be set according to the case. Preferably, when the number of support beams 4 is multiple, the multiple support beams 4 are evenly connected to the lifting equipment 3 to ensure that the lifting equipment 3 is evenly stressed.

Further, in the above step 3, the anchoring device 6 includes an anchor pad 61 and an anchor head 62 for fastening, and the bottom of the steel strand bundle 1 penetrates out of the anchor pad 61 and is fastened to the anchor pad through the anchor head 62 plate 61. Specifically, the anchor plate 61 is located above the anchor head 62, and the bottom area of the anchor plate 61 should be larger than the top area of the anchor head 62, so that the anchor head 62 can fully play an anchoring role.

Further, the above step 4 also includes: driving the steel strand bundle 1 to rise by the lifting device 3, making the anchoring device 6 press the formwork support system 7, and dismantling the flask 8 and the steel pipe column 9 below the formwork support system 7.

The steel strand bundle 1 is driven down by the lifting device 3, and the formwork support system 7 is lowered to the ground as a whole and removed.

In the description of the application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the application and simplifying the description, Rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation on the application. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

It should be noted that in this application, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that Any such actual relationship or sequence exists between these entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element.

The above descriptions are only specific embodiments of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims (10)

1. A demolish device of box girder template support system, its characterized in that demolish the device and include:

a balance beam (2) horizontally disposed, the balance beam (2) having a through hole penetrating in a height direction thereof;

a hoisting device (3) arranged on the top surface of the balance beam (2);

the steel strand bundle (1) penetrates through the through hole of the balance beam (2) and the hoisting equipment (3) along the height direction of the balance beam (2), the hoisting equipment (3) can drive the steel strand bundle (1) to move along the penetrating direction of the steel strand bundle, and the bottom of the steel strand bundle (1) is connected with an anchoring device (6).

2. A demolition arrangement for a box beam formwork support system as claimed in claim 1, wherein: the dismounting device further comprises a support beam (4), the support beam (4) is arranged obliquely relative to the hoisting equipment (3), and one end of the support beam (4) is connected to the hoisting equipment (3).

3. A removal apparatus for a box beam formwork support system as defined in claim 2, wherein: the end surface of the free end of the supporting beam (4) is flush with the bottom surface of the balance beam (2).

4. A removal apparatus for a box beam formwork support system as defined in claim 1, wherein: the anchoring device (6) comprises an anchoring backing plate (61) and an anchoring head (62) for fastening, wherein the bottom of the steel strand bundle (1) penetrates through the anchoring backing plate (61) and is fastened to the anchoring backing plate (61) through the anchoring head (62).

5. A box girder formwork support system, comprising:

a formwork support system (7);

the box beam (5) is arranged on the top surface of the formwork support system (7);

and a demolition arrangement, the demolition arrangement comprising:

the balance beam (2) extends horizontally along the longitudinal bridge direction, and the balance beam (2) is arranged on the top surface of the box girder (5);

a hoisting device (3) arranged on the top surface of the balance beam (2);

steel strand bundle (1), its follow the direction of height of case roof beam (5) run through in proper order in template support system (7) case roof beam (5) compensating beam (2) and hoisting equipment (3), hoisting equipment (3) can order about steel strand bundle (1) and remove along its direction of running through, the bottom of steel strand bundle (1) runs through out template support system (7), and through anchoring device (6) anchor in the bottom of template support system (7).

6. A box beam formwork support system as claimed in claim 5, wherein: the dismounting device further comprises a supporting beam (4), the supporting beam (4) is obliquely arranged relative to the hoisting equipment (3), one end of the supporting beam (4) is connected to the hoisting equipment (3), and the other end of the supporting beam is connected to the top surface of the box beam (5).

7. A box beam formwork support system as claimed in claim 6, wherein: every hoisting equipment (3) are connected with two supporting beams (4), two supporting beams (4) symmetric distribution is in hoisting equipment's (3) relative both sides.

8. A construction method of a demolition apparatus of a box girder template support system according to claim 1, wherein the construction method comprises:

the top surface of the box girder (5) is provided with a balance beam (2), and the top surface of the balance beam (2) is provided with a hoisting device (3);

vertically installing a steel strand bundle (1), enabling the steel strand bundle (1) to sequentially penetrate through a template supporting system (7), a box girder (5), a balance beam (2) and a hoisting device (3), and enabling the bottom of the steel strand bundle (1) to penetrate through the template supporting system (7);

an anchoring device (6) is arranged at the bottom of the steel strand bundle (1) to enable the steel strand bundle (1) to be anchored at the bottom of the formwork supporting system (7);

the steel strand bundle (1) is driven to be lowered through the hoisting equipment (3), and the template supporting system (7) is lowered and detached.

9. The construction method according to claim 8, wherein the steel strand bundle (1) is vertically installed, the steel strand bundle (1) sequentially penetrates through the formwork support system (7), the box girder (5), the balance beam (2) and the hoisting equipment (3), and the bottom of the steel strand bundle (1) penetrates through the formwork support system (7) further comprises:

a supporting beam (4) is arranged on the top surface of the box girder (5), so that one end of the supporting beam (4) is connected to the hoisting equipment (3), and the other end of the supporting beam is connected to the top surface of the box girder (5).

10. The construction method according to claim 1, wherein the driving of the steel strand bundle (1) down by the hoisting device (3) and the lowering of the formwork support system (7) for dismantling further comprises:

the steel strand bundle (1) is driven to rise through the hoisting equipment (3), the anchor device (6) is tightly propped against the formwork support system (7), and a sand box (8) and a steel pipe upright post (9) below the formwork support system (7) are detached;

the steel strand bundle (1) is driven to be lowered through the hoisting equipment (3), and the template supporting system (7) is integrally lowered to the ground and detached.

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