CN113401815B - High-altitude conversion system of core tube tower crane of super high-rise building and construction method thereof - Google Patents

Abstract

The invention discloses a tower crane high-altitude conversion system for a core tube of a super high-rise building and a construction method thereof. The conversion system comprises a core tube and a corresponding main structure, a tower crane inner climbing foundation base connected inside the core tube, and a conversion unit connected above the core tube. A temporary structure, a clamping assembly connected to the conversion temporary structure, and a conversion base connected to the bottom of the conversion temporary structure and located above the core tube. The invention ensures the further installation of the upper structure of the core tube and the bearing capacity of the tower crane by setting the conversion foundation again on the top of the core tube; and by setting the temporary structure of the conversion, it is convenient for the tower crane section to convert the bottom foundation first. Temporary fixing to ensure the construction of the lower part; through the setting of the clamping components and the conversion foundation base, it can not only ensure the fixing of the tower crane section during the conversion process, but also ensure that the lower core tube structure is used to ensure the support of the temporary structure of the conversion, and at the same time, the lower core can be ensured. The construction of other processes in the cylinder is inserted in advance.

Description

A kind of super high-rise building core tube tower crane high-altitude conversion system and its construction method

technical field

The invention belongs to the technical field of tower crane construction, and particularly relates to a tower crane high-altitude conversion system for a core tube of a super high-rise building and a construction method thereof.

Background technique

With the rapid development of super high-rise buildings in China, the tower crane, as the most important vertical transportation tool in the construction of super high-rise buildings, has increasingly mature technology. to the members of the stressed structure. In the construction of super high-rise buildings, the construction organization mode of "core tube first, outer frame follows" is generally adopted. As a safe and economical fixed climbing method for tower cranes, inner climbing of tower cranes is widely used in the construction of super high-rise buildings. Due to the influence of the structural layout, the shrinkage of the core tube wall is often encountered, and the tower crane foundation must be converted to ensure that the tower crane climbs upward. In general, super high-rise projects will give priority to the external hanging foundation when the tower crane foundation is converted. In view of the particularity of the core tube structure layout, due to the difficulty of the external hanging foundation installation, long construction period, poor technical economy, and climbing formwork intervention, it is necessary to consider A more economical and safe conversion method to achieve smooth climbing of the tower crane.

SUMMARY OF THE INVENTION

The invention provides a tower crane high-altitude conversion system for a core tube of a super-high-rise building and a construction method thereof, which are used to solve the problem of the conversion and temporary structure installation of the inner-climbing tower crane in the high-altitude conversion and climbing mode due to the layout change of the core tube in the high-rise or super high-rise building. Technical issues such as fixing and installation and construction of supporting structures.

To achieve the above object, the present invention adopts the following technical solutions:

A tower crane high-altitude conversion system for a core tube of a super high-rise building, comprising a core tube and a corresponding main structure, a core tube shear wall connected above the top of the core tube, a tower crane inner climbing foundation base connected inside the core tube, and a core tube connected to the core tube. The upper transition temporary structure, the clamping components connected to the transition temporary structure and the shear wall of the core tube, the transition foundation located at the bottom of the transition temporary structure and connected to the top plate of the core tube, and the tower crane section connected to the top of the transition foundation;

The conversion temporary structure includes auxiliary frame vertical rods connected with the core tube shear wall and surrounding structural columns, auxiliary frame horizontal rods connected to the auxiliary frame vertical rods at intervals in the horizontal direction, and spaced connection between the structural column and the load-bearing clamp. The auxiliary frame diagonal support between the beams or between the structural column and the auxiliary frame horizontal rod, and the auxiliary frame bearing rod connected with the auxiliary frame vertical rod on the temporary fixed floor of the tower crane; the auxiliary frame vertical rod and the auxiliary frame horizontal rod . The auxiliary frame load-bearing rod forms a frame body and is connected with the tower crane joint through the clamping assembly;

The clamping assembly includes a clamping rod connected to the surrounding of the tower crane section and arranged horizontally and a load-bearing clamp beam connected between the core tube shear wall and the auxiliary frame load-bearing rod, and the load-bearing clamp beam is temporarily detachable and connected to the bottom of the tower crane section. ; the end of the clamping rod is connected with the structural column and/or the transition temporary structure;

The conversion foundation includes a square-arranged swivel foundation column, two swivel foundation bearing beams connected to the top of the swivel foundation column and arranged in parallel, and a swivel foundation reinforcing brace connected between the two swivel foundation bearing beams. The conversion foundation base is connected with the conversion support beam in the top plate of the core tube; the rotary base bearing beam is correspondingly connected to the base of the tower crane section, the tower crane section is installed on the upper part of the tower crane section base, and the top of the tower crane section is connected to the hoisting mechanism.

Further, the lower part of the conversion support beam is also connected with a structural reinforcement diagonal brace, and the lower part of the structural reinforcement diagonal brace is fixedly connected with the core tube.

Further, the load-bearing clamp beam is a double H-shaped piece with two parallel cross bars vertically connected in the middle of the two parallel beams to form a mouth, and the two parallel beams are both connected between the auxiliary frame load-bearing bar and the core tube shear wall.

Further, both ends of the auxiliary frame load-bearing rod are connected between the two auxiliary frame vertical rods on the opposite side of the core tube shear wall; the auxiliary frame horizontal rod includes two auxiliary frames horizontally connected to the opposite side of the core tube shear wall. The auxiliary frame horizontal cross bar between the frame vertical bars and the auxiliary frame horizontal inclined bar connected between the structural column and the auxiliary frame vertical bar, and between the core tube shear wall and the structural column; the auxiliary frame horizontal The inclined rods are arranged at vertical intervals of the vertical rods of the auxiliary frame.

Further, the inner climbing foundation base of the tower crane is detachably connected to the shear walls on both sides inside the core tube. The inner-climbing diagonal bracing connected to the core tube and the inner-climbing lateral support are arranged in parallel below the inner-climbing foundation.

Further, the clamping rods are arranged at intervals in the transition temporary structure, and the clamping rods are respectively fixed with the tower crane joint, the auxiliary frame bearing rod and the core tube shear wall.

Further, the construction method of the high-altitude conversion system of the core tube tower crane of the super high-rise building, the specific steps are as follows:

Step 1. Embedded parts installation

Install and fix the embedded parts at the axis and elevation marked in the design in advance during the construction of the main structure;

Step 2. Install and convert temporary structure

1) After the construction of the core tube and the main structure of the Nth floor, and the completion of the climbing formwork transformation of the core tube, the climbing formwork climbs to the N+1 floor, and then the temporary structure is installed and converted;

2) When the load-bearing clamp beams on the N+1 and N+4 floors are installed, the cross-section of the core tube is reduced, the concrete wall shrinks inward, and the embedded parts cannot be fixed. The temporary structure is installed and converted to support the installation of the load-bearing clamp beam; The top plate of the core tube is connected, and the bottom of the conversion support beam is made into a triangular support through structural reinforcement and diagonal bracing to ensure that it will not be deformed by compression;

3) When installing and converting the temporary structure, install it twice. First install the vertical rod of the auxiliary frame. After fixing, install the horizontal rod of the auxiliary frame, the diagonal support of the auxiliary frame and the bearing rod of the auxiliary frame. After the verticality correction is completed, uniformly weld. Then proceed to the installation and welding of the vertical rod of the auxiliary frame, the horizontal rod of the auxiliary frame, the diagonal support of the auxiliary frame and the bearing rod of the auxiliary frame;

Step 3. Install the clamping components

Install the load-bearing clamping beams and clamping rods of the tower crane section on the N+1th floor and the upper part, where N is an integer greater than 1; the installation is performed sequentially from bottom to top;

Step 4. Climb the tower crane

The tower crane inner climbing foundation base is left in the core tube, and the tower crane is further climbed by the inner climbing device. Before installing the Nth floor conversion foundation, the tower crane needs to be climbed to the N+1th floor first, so that the tower crane section is temporarily installed through the climbing frame. On the load-bearing clamp beam on the N+1 floor;

Among them, the load-bearing clamp beam is a double H-shaped piece with two parallel cross bars vertically connected in the middle of the two parallel beams, and the two parallel beams are both connected between the auxiliary frame load-bearing bars and the core tube shear wall;

Step 5. Construction conversion foundation

The conversion temporary structure for climbing the tower crane section is installed, clamped and fixed, and the conversion foundation of the N floor is completed; wherein, the conversion foundation includes the conversion foundation base, the square-arranged swivel foundation column, and the parallel set connected to the top of the swivel foundation column. Two revolving foundation load-bearing beams and a revolving foundation reinforcing brace connected between the two revolving foundation bearing beams; the revolving foundation upright column is connected with the converting support beam in the top plate of the core tube through the converting foundation base;

Step 6. The tower crane is dropped back to the conversion foundation

After the construction of the conversion foundation is completed, drop the base of the tower crane section back to the Nth floor to complete the foundation conversion of the connection;

Step 7. Install the wall-attached tie rod and the jacking frame

When the tower crane section reaches the specified height, install the upper wall tie rod of the tower crane section and the tower top lifting frame;

Step 8. Remove the clamping assembly and convert the temporary structure

Use another tower crane to remove the clamping components and convert the temporary structure in conjunction with the chain hoist, thus completing the overall conversion of the tower crane foundation.

Further, for the step 5, when the conversion foundation of the Nth floor is installed, the lower part of the inner climbing support beam in the lowermost road shall be transported to the Nth floor, and the conversion foundation shall be erected on the Nth floor to ensure the center distance of the conversion foundation and the center of the main limb of the tower crane section. The spacing is suitable; connect the lower part of the inner climbing base section in the tower crane section with the detachable foot of the tower crane, and the detachable foot in the tower crane section directly falls on the newly erected conversion foundation. After adjusting the verticality of the tower crane to meet the requirements, clamp the inner climber. After the frame jacks up the bolts, weld the detachable foundation to the newly erected conversion foundation;

Among them, a stress sensor and a strain sensor are installed at the bottom of the conversion foundation to monitor the changes of stress and displacement in real time, and connect to the control device for early warning after setting the limit threshold.

Further, for step 7, after the base of the tower crane section is re-rooted after the conversion foundation, the tower crane jacking frame is installed; Determine the opening direction of the jacking frame, that is, the introduction direction of the standard section, according to the lifting step direction of the on-site tower ceiling.

The beneficial effects of the present invention are embodied in:

1) The present invention ensures the further installation of the upper structure of the core tube and the bearing capacity of the tower crane by setting the conversion foundation again on the top of the core tube;

2) The present invention facilitates the temporary fixation on the top when the tower crane section converts the bottom foundation to ensure the construction of the bottom through the setting of the temporary structure conversion;

3) The present invention can not only ensure the fixation of the tower crane section during the conversion process, but also ensure the support of the temporary structure of the conversion by using the lower core tube structure through the setting of the clamping assembly and the conversion foundation base;

In addition, the system designed by the invention is simple in form, simple in node design, small in force on the foundation support, and small in influence on the climbing form; compared with the commonly used externally-mounted foundation, the externally-attached conversion foundation steel member has a small cross-section and a small installation amount, and only needs to be installed once. Assembly and disassembly of conversion components. The conversion of foundation construction does not conflict with climbing formwork and steel structure construction, and foundation construction saves labor and construction time. The invention can be widely used in the selection and implementation of the tower crane foundation of the climbing tower crane in the super high-rise building because the structural layout changes.

Other features and advantages of the invention will be set forth in the description which follows, and in part will become apparent from the description, or may be learned by practice of the invention; the principal objects and other advantages of the invention may be particularly pointed out in the description programs to achieve and obtain.

Description of drawings

Figure 1 is a schematic diagram of the construction of the tower crane high-altitude conversion system for the core tube of a super high-rise building;

Figure 2 is a schematic diagram of the connection of the inner climbing foundation support of the tower crane;

3 is a schematic elevation view of a tower crane high-altitude conversion foundation of the present invention;

4 is a schematic elevation view of the tower crane conversion temporary structure of the present invention;

5 is a schematic plan view of the N-layer of the tower crane conversion temporary structure of the present invention;

6 is a schematic plan view of the N+1 floor of the tower crane conversion temporary structure of the present invention;

7 is a schematic plan view of the N+2~N+3 floors of the tower crane conversion temporary structure of the present invention;

8 is a schematic plan view of the N+4 floor of the tower crane conversion temporary structure of the present invention;

9 is a schematic elevation view of the tower crane conversion foundation of the present invention;

10 is a schematic plan view of the tower crane conversion foundation of the present invention.

Reference signs: 1-core tube, 2-core tube shear wall, 3-inner climbing foundation base of tower crane, 31-inner climbing support beam, 32-inner climbing diagonal brace, 33-inner climbing lateral support, 4-tower crane Section, 5-Conversion Foundation, 51-Conversion Support Beam, 52-Conversion Foundation Base, 53-Turn Foundation Bearing Beam, 54-Turn Foundation Column, 55-Structural Reinforcement Diagonal Bracing, 56-Turn Foundation Reinforcing Bracing, 6-Clamping Components, 61-load-bearing clamp beam, 62-clamping rod, 7-climbing formwork, 8-core tube top plate, 9-transition temporary structure, 91-auxiliary frame vertical rod, 92-auxiliary frame diagonal support, 93-auxiliary frame Horizontal rod, 931-Auxiliary frame horizontal crossbar, 932-Auxiliary frame horizontal inclined rod, 94-Auxiliary frame load-bearing rod, 10-Structural column, 11-Embedded part.

Detailed ways

Taking a commercial building as an example, the main tower is 57 floors and the podium is 5 floors; the main tower building height is 260m. As shown in Figure 1, during the construction, the internal climbing construction is adopted below the L25 floor. Since the tower crane needs to use an external method to lift the tower crane on the L25 floor, considering that the official elevator machine room in the lower area of the project is located between the L23-L24 floors Therefore, the tower crane high-rise foundation is set on the L25 floor, in order to ensure that the tower crane high-rise foundation can smoothly fall on the L25 floor. Therefore, the high-altitude conversion system and its construction method of the core tube tower crane of the super high-rise building are used for high-altitude conversion to ensure normal construction.

As shown in Figures 1 to 10, it includes a core tube 1 and a corresponding main structure, a core tube shear wall 2 connected to the top of the core tube 1, a tower crane inner climbing foundation base 3 connected to the inside of the core tube 1, and a The conversion temporary structure 9 above the core tube 1 , the clamping assembly 6 connected to the conversion temporary structure 9 , the conversion foundation 5 located above the core tube 1 , and the tower crane section connected above the conversion foundation 5 .

In this embodiment, the inner climbing foundation base 3 of the tower crane is detachably connected to the shear walls on both sides inside the core tube 1, and the inner climbing foundation base 3 of the tower crane includes a mouth-shaped inner climbing support beam 31, which is connected to the inner climbing support beam. The inner climbing diagonal braces 32 around the 31 and connected with the core tube 1 and the inner climbing lateral supports 33 between the inner climbing support beams 31 .

In the present embodiment, the clamping assembly 6 includes a clamping rod 62 connected to the surrounding of the tower crane 4 and arranged horizontally, and a load-bearing clamping beam 61 connected between the core tube shear wall 2 and the auxiliary frame bearing rod 94 . The clamping beam 61 is temporarily detachably connected to the bottom of the tower crane section 4; the end of the clamping rod 62 is connected to the structural column 10 and/or the conversion temporary structure 9;

In this embodiment, the conversion temporary structure 9 includes an auxiliary frame vertical rod 91 connected to the core tube shear wall 2 and the surrounding structural columns 10, and an auxiliary frame horizontal rod 93 connected to the auxiliary frame vertical rod 91 in the horizontal direction at intervals, The load-bearing clamp beam 61 connected between the core tube shear wall 2 and the auxiliary frame horizontal rod 93, the auxiliary frame connected between the structural column 10 and the load-bearing clamp beam 61 or between the structural column 10 and the auxiliary frame horizontal rod 93 The frame diagonal support 92, and the auxiliary frame support rod 94 connected to the auxiliary frame vertical rod 91 on the temporarily fixed floor of the tower crane; the auxiliary frame vertical rod 91, the auxiliary load bearing rod 94 and the auxiliary frame horizontal rod 93 form a frame body and are clamped by The assembly 6 is connected to the tower crane section 4 ; the load-bearing clamp beam 61 is temporarily detachably connected to the bottom of the tower crane section 4 .

In this embodiment, the conversion foundation 5 includes a square-arranged swivel upright column 54 , two swivel foundation bearing beams 53 connected to the top of the swivel foundation column 54 and arranged in parallel, and a swivel foundation reinforcement connected between the two swivel foundation bearing beams 53 The support 56; the base bearing beam 53 is correspondingly connected to the base of the tower crane section, the tower crane section 4 is installed on the upper part of the tower crane section base, and the top of the tower crane section 4 is connected to the hoisting mechanism. The rotating base column 54 is connected with the transforming support beam 51 in the core tube top plate 8 through the transforming foundation base 52 .

In this embodiment, the bottom of the conversion foundation 5 is detachably connected to the conversion support beam 51 , the lower part of the conversion support beam 51 is also connected with a structural reinforcement diagonal brace 55 , and the lower part of the structural reinforcement diagonal brace 55 is fixedly connected to the core tube 1 .

In this embodiment, the load-bearing clamp beam 61 is a double H-shaped steel piece with two parallel cross bars vertically connected in the middle of the two parallel beams to form a mouth, and the two parallel beams are connected between the auxiliary frame load-bearing bar 94 and the core tube shear wall 2 .

In this embodiment, the auxiliary frame horizontal bars 93 include the auxiliary frame horizontal bars 931 horizontally connected between the two auxiliary frame vertical bars 91 on the opposite sides of the core tube shear wall 2, and the auxiliary frame horizontal bars 931 connected to the structural column 10 and the auxiliary frame vertical bars 91. Auxiliary frame horizontal inclined rods 932 between the vertical rods 91 and between the core tube shear wall 2 and the structural column 10; The auxiliary frame load-bearing rods 94 are connected between the auxiliary frame vertical rods 91 on the fixed floor of the tower crane, and are correspondingly connected with the load-bearing clamp beams 61 .

In this embodiment, the clamping rods are arranged at intervals in the transition temporary structure, and the clamping rods include tower crane sections which are respectively fixed to the auxiliary frame load-bearing rod and the core tube shear wall.

1 to 10, the construction method of the super high-rise building core tube tower crane high-altitude conversion system is further described, and the specific steps are as follows:

Step 1. Embedded parts installation

During the construction of the main structure, the embedded parts 11 are installed and fixed at the axes and elevations marked in the design in advance.

For step 1, after the core tube 1 and the main structure steel bars are bound, and before the concrete formwork is closed, spot welding the embedded part 11 to the axis and elevation marked on the design drawing, and the deviation shall not be greater than 5mm; after the formwork reinforcement is completed, again Measure the positioning data, if the deviation is greater than 5mm, adjust it immediately.

In this embodiment, the support system is connected to the main structure through the embedded part 11, and the embedded part 11 and the support are connected by fillet welding, the welding seam level is first-class, and the flaw detection ratio is 100%.

In this embodiment, at a position of 1.5m~1.8m above the load-bearing clamp beam 61 of the tower crane section 4, the embedded part 11 is embedded on the wall of the core tube shear wall 2, which is used for the conversion of the temporary structure 9 and the manual installation of the clamping assembly 6. Fixing point for the gourd.

Step 2. Install and convert temporary structure 9

After the construction of the core tube 1 and the main structure of the Nth floor, and the completion of the transformation of the climbing formwork 7 of the core tube 1, the climbing formwork 7 climbs to the N+1 floor, and then the temporary structure 9 for conversion is installed.

In this embodiment, after the construction of the vertical structure of the core tube 1 is completed on the L25 floor and the transformation of the climbing formwork 7 of the core tube 1 is completed, the climbing formwork 7 climbs to the L26 floor. At this time, the installation of the conversion temporary structure 9 for tower crane climbing begins. The vertical wall construction of the core tube 1 is completed on the L27 floor. Continue to install the tower crane climbing conversion temporary structure 9 and install the L26 floor tower crane on the L26 floor clamping assembly 6.

When the load-bearing clamp beam 61 is installed, the cross-section of the core tube 1 is reduced, the concrete wall shrinks inward, and the embedded part 11 cannot be fixed. The installation and conversion temporary structure 9 is used to support the installation of the load-bearing clamp beam 61; the conversion temporary structure 9 is connected with the core tube top plate 8 , the bottom of the conversion temporary structure 9 is made into a triangular support through the structural reinforcement diagonal brace 55 to ensure that it will not be deformed by compression.

In this embodiment, before installing the conversion foundation 5 on the 25th floor, the tower crane section 4 needs to be climbed to the 26th floor first, so that the base of the tower crane section sits on the load-bearing clamp beam 61 on the 26th floor first, and the second clamp is made on the 30th floor. to ensure the overall stability of the tower crane; after the 25-story tower crane conversion foundation 5 and the corresponding support are installed, the tower crane joint base is lowered to the conversion foundation 5 and fixed.

When installing and converting the temporary structure 9, install it twice, first install the auxiliary frame vertical rod 91, and then install the auxiliary frame horizontal rod 93, the auxiliary frame inclined support 92 and the auxiliary frame bearing rod 94 after the completion of the fixing, and the verticality correction is completed. Welding is performed, and then the installation and welding of the next section of the vertical rod 91 of the auxiliary frame, the horizontal rod 92 of the auxiliary frame, the diagonal support 92 of the auxiliary frame and the bearing rod 94 of the auxiliary frame are carried out.

Step 3. Install the clamping components

The load-bearing clamping beams 61 and the clamping rods 62 are arranged at intervals on the N+1th layer and the upper part, wherein N is an integer greater than 1. Install from bottom to top.

Step 4. Climb the tower crane

The inner climbing foundation base 3 of the tower crane is left in the core tube 1, and the tower crane is further climbed by the inner climbing device. Before installing the Nth floor conversion foundation 5, the tower crane needs to be climbed to the N+1th floor first, so that the tower crane section 4 can pass through the climb. The frame is temporarily installed on the load-bearing clamp beam 61 on the N+1th floor.

Among them, the load-bearing clamp beam 61 is a double H-shaped piece with two parallel cross bars vertically connected in the middle of the two parallel beams, and the two parallel beams are both connected between the auxiliary frame load-bearing bar 94 and the core tube shear wall 2 .

In this embodiment, the tower crane section 4 is climbed, and the base of the tower crane section is placed on the L22 floor. The vertical structure construction of the core tube 1 is completed on the L31 floor, and the conversion temporary structure 9 for the tower crane's overall climbing is completed;

Among them, the load-bearing clamp beam 61 is a double H-shaped piece with two parallel cross bars vertically connected in the middle of the two parallel beams, and the two parallel beams are both connected between the auxiliary frame load-bearing bar 94 and the core tube shear wall 2 .

Step 5. Construction conversion foundation

The conversion temporary structure 9 for climbing the tower crane section 4 is installed, clamped and fixed, and the N-layer conversion foundation 5 is completed.

The conversion foundation 5 includes a conversion foundation base 52 , a square-arranged swivel foundation column 54 , two swivel foundation bearing beams 53 connected to the top of the swivel foundation column 54 and arranged in parallel, and a swivel foundation connected between the two swivel foundation bearing beams 53 Reinforcing support 56 ; swivel base upright column 54 is connected with the conversion support beam 51 in the core tube top plate 8 through the conversion base base 52 .

In step 5, when the conversion foundation 5 on the Nth floor is installed, the lower part of the inner climbing support beam 31 in the lowermost road is transported to the Nth floor, where the conversion foundation 5 is erected on the Nth floor to ensure that the center distance of the conversion foundation 5 is the same as that of the tower crane joint 4. The distance between the centers of the limbs should be adapted; the lower part of the inner climbing base section in the tower crane section 4 is connected with the detachable feet of the tower crane, and the detachable feet in the tower crane section 4 fall directly above the newly erected conversion foundation 5. After adjusting the verticality of the tower crane to meet the requirements , After clamping the jacking bolts of the inner climbing frame, weld the detachable foundation to the newly erected conversion foundation 5.

After the verticality of the entire tower crane meets the requirements, after clamping the jacking bolts of the inner climbing frame, weld the detachable foundation to the newly erected conversion foundation 5, and weld the 600mm diameter detachable foundation base plate around the arc, and the height of the welding feet is 30mm. .

Among them, a stress sensor and a strain sensor are installed at the bottom of the conversion foundation 5 to monitor the changes of stress and displacement in real time, and connect to the control device for early warning after setting the limit threshold.

Step 6. The tower crane is dropped back to the conversion foundation

After the construction of the top plate 8 of the core tube is completed, the base of the tower crane section is dropped back to the Nth floor to complete the foundation conversion of the connection.

Step 7. Install the wall-attached tie rod and the jacking frame

When the tower crane section 4 reaches the specified height, install the upper wall tie rod of the tower crane section 4 and the tower top lifting frame;

For step 7, after the base of the tower crane section is re-rooted after the conversion foundation 5, the tower crane jacking frame is installed; the jacking frame is mutually installed by adjacent tower cranes, and the reverse chain is required at the same time; when the jacking frame is installed, according to the site The direction of the lifting step of the tower ceiling determines the opening direction of the jacking frame, that is, the introduction direction of the standard section.

In this embodiment, the tower-suspended ceiling-lifting frame includes a tie rod assembly, a connecting piece, a standard section, and the like. On-site hoisting to attach the frame. During construction, hang the attachment frame on one side to the attachment point of the tower body. Lift the other side attachment frame into place, then join the two outer frames together. The frame is leveled first and then fixed. The double-hole support connected to the wall is attached to the ear plate and fixed by welding. Bevel welding, the height of the welding leg is 14mm. Welding tie rods are used, the tie rods are hoisted and attached, the tie rods are pinned and sealed with cotter pins, the outer sleeve and the plug-in are inlaid first, and no welding is required for the time being.

In this embodiment, to adjust the verticality of the tower body, when adjusting, a heavy object with an appropriate weight should be hoisted first, and the front and rear moments should be adjusted. After it is in a balanced position, use the theodolite to monitor the deviation of the tower body in both directions, and adjust the verticality deviation to not exceed 2‰. If the welding tie rod is used, the welding shall be carried out on site, and the upper outer joint and the plug-in shall be welded. The welding length of each welding seam shall not be less than 400 mm, the welding seam thickness shall be 10 mm, and the welding seam shall not have defects such as pores and slag inclusion; , you need to adjust the adjusting bolt to the appropriate position. After the attachment is qualified, the tower crane can be lifted.

Step 8. Remove the clamping assembly and convert the temporary structure

Use another tower crane to remove the clamping assembly 6 and convert the temporary structure 9 in cooperation with the chain hoist, thus completing the overall conversion of the tower crane foundation.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. should be included within the protection scope of the present invention.

Claims (10)

1. A super high-rise building core tube tower crane high idling exchange system is characterized by comprising a core tube (1) and a corresponding main body structure, a core tube shear wall (2) connected above the top of the core tube (1), a tower crane inner climbing foundation base (3) connected inside the core tube (1), a conversion temporary structure (9) connected above the core tube (1), a clamping assembly (6) connected on the conversion temporary structure (9) and the core tube shear wall (2), a conversion foundation (5) located at the bottom of the conversion temporary structure (9) and connected above a core tube top plate (8), and a tower crane section (4) connected above the conversion foundation (5);

the temporary conversion structure (9) comprises auxiliary frame vertical rods (91) connected with the core tube shear wall (2) and the surrounding structural columns (10), auxiliary frame horizontal rods (93) connected to the auxiliary frame vertical rods (91) in the horizontal direction at intervals, auxiliary frame inclined supports (92) connected between the structural columns (10) and the bearing clamp beams (61) or between the structural columns (10) and the auxiliary frame horizontal rods (93) at intervals, and auxiliary frame bearing rods (94) connected with the auxiliary frame vertical rods (91) at the temporary tower crane fixing floor; the auxiliary frame vertical rod (91), the auxiliary frame horizontal rod (93) and the auxiliary frame bearing rod (94) form a frame body and are connected with the tower crane section (4) through the clamping assembly (6);

the clamping assembly (6) comprises clamping rods (62) which are connected with the periphery of the tower crane section (4) and are horizontally arranged and a bearing clamping beam (61) which is connected between the core tube shear wall (2) and the auxiliary frame bearing rod (94), and the bearing clamping beam (61) is temporarily detachably connected with the bottom of the tower crane section (4); the end of the clamping rod (62) is connected with the structure column (10) and/or the conversion temporary structure (9);

the conversion foundation (5) comprises a rotating foundation upright post (54) which is arranged in a square shape, two rotating foundation bearing beams (53) which are connected to the tops of the rotating foundation upright posts (54) and arranged in parallel, and a rotating foundation reinforcing support (56) which is connected between the two rotating foundation bearing beams (53), wherein the rotating foundation upright post (54) is connected with a conversion support beam (51) in the core barrel top plate (8) through a conversion foundation base (52); the rotating base bearing beam (53) is correspondingly connected with a tower crane section base, a tower crane section (4) is installed on the upper portion of the tower crane section base, and the top of the tower crane section (4) is connected with a hoisting mechanism.

2. The super high-rise building core tube tower crane high-idle exchange system as claimed in claim 1, characterized in that the lower part of the conversion supporting beam (51) is further connected with a structural reinforcement inclined strut (55), and the lower part of the structural reinforcement inclined strut (55) is fixedly connected with the core tube (1).

3. The super high-rise building core tube tower crane high-idling system as claimed in claim 1, wherein the bearing clamp beam (61) is a double H-shaped member formed by two parallel beams vertically connected with two parallel cross bars in the middle, and the two parallel beams are connected between the auxiliary frame bearing bar (94) and the core tube shear wall (2).

4. The high-idle exchange system of the core tube tower crane of the super high-rise building as claimed in claim 3, characterized in that both ends of the auxiliary frame bearing rod (94) are connected between the two auxiliary frame vertical rods (91) at the opposite side of the core tube shear wall (2); the auxiliary frame horizontal rods (93) comprise auxiliary frame horizontal cross rods (931) horizontally connected between two auxiliary frame vertical rods (91) on the opposite side of the core barrel shear wall (2) and auxiliary frame horizontal inclined rods (932) connected between the structural column body (10) and the auxiliary frame vertical rods (91) and between the core barrel shear wall (2) and the structural column body (10); horizontal down tube (932) of auxiliary frame sets up at the vertical interval of auxiliary frame vertical pole (91).

5. The core tube tower crane high-idle exchange system of the super high-rise building, according to claim 1, is characterized in that the tower crane internal climbing foundation base (3) is detachably connected to the shear walls on two sides inside the core tube (1), the tower crane internal climbing foundation base (3) comprises an internal climbing support beam (31) in a square shape or an H shape, an internal climbing inclined strut (32) connected to the periphery of the internal climbing foundation and connected with the core tube (1), and an internal climbing transverse strut (33) arranged in parallel below the internal climbing foundation.

6. The high-idle conversion system of the core tube tower crane of the super high-rise building as claimed in claim 1, characterized in that the clamping rods (62) are arranged at intervals on the conversion temporary structure (9), and the clamping rods (62) are respectively fixed with the tower crane sections (4), the auxiliary frame bearing rods (94) and the core tube shear wall (2).

7. The construction method of the core tube tower crane high-altitude conversion system of the super high-rise building according to any one of claims 1 to 6, characterized by comprising the following specific steps:

step one, mounting embedded parts

When the main structure is constructed, the embedded part (11) is installed and fixed at the axis and the elevation of the design label in advance;

step two, installing and converting the temporary structure

1) Constructing the Nth layer of the core barrel (1) and the main structure, after the transformation of the creeping formwork (7) of the core barrel (1) is completed, climbing the creeping formwork (7) to the N +1 layer, and then installing a conversion temporary structure (9);

2) when the bearing clamping beams (61) of the N +1 layer and the N +4 layer are installed, the section of the core cylinder (1) is reduced, the concrete wall is contracted inwards, the embedded part (11) cannot be fixed, and the installation and conversion temporary structure (9) is used for supporting the installation of the bearing clamping beams (61); the conversion temporary structure (9) is connected with the top plate (8) of the core barrel, wherein the bottom of the conversion supporting beam (51) is made into a triangular support through a structure reinforcing inclined strut (55) to ensure that the conversion supporting beam cannot deform under pressure;

3) when the temporary structure (9) is installed and converted, the temporary structure is installed twice, an auxiliary frame vertical rod (91) is installed firstly, an auxiliary frame horizontal rod (93), an auxiliary frame inclined support (92) and an auxiliary frame bearing rod (94) component are installed after fixing is completed, welding is uniformly carried out after verticality correction is completed, and then installation and welding of the next auxiliary frame vertical rod (91), an auxiliary frame horizontal rod (93), an auxiliary frame inclined support (92) and an auxiliary frame bearing rod (94) are carried out;

step three, installing a clamping assembly

Installing bearing clamping beams (61) and clamping rods (62) of a tower crane section (4) which are arranged on the (N + 1) th layer and the upper part at intervals, wherein N is an integer greater than 1; sequentially mounting from bottom to top;

step four, climbing tower crane

The tower crane inner climbing foundation base (3) is left in the core tube (1), the tower crane is further climbed through an inner climbing device, before the Nth layer of conversion foundation (5) is installed, the tower crane needs to climb to the (N + 1) th layer, and the tower crane section (4) is temporarily installed on the bearing clamp beam (61) of the (N + 1) th layer through a climbing frame;

the bearing clamp beam (61) is a double H-shaped piece formed by vertically connecting two parallel cross rods to the middle parts of two parallel beams to form a square, and the two parallel beams are connected between the auxiliary frame bearing rod (94) and the core tube shear wall (2);

step five, construction conversion foundation

Completing installation, clamping and fixing of a temporary conversion structure (9) for climbing of the tower crane section (4), and completing construction of a conversion foundation (5) with N layers; the conversion foundation (5) comprises a conversion foundation base (52), a square-arranged foundation transfer column (54), two foundation transfer bearing beams (53) connected to the tops of the foundation transfer column (54) in parallel and a foundation transfer reinforcing support (56) connected between the two foundation transfer bearing beams (53); the foundation-rotating upright column (54) is connected with a conversion supporting beam (51) in the core barrel top plate (8) through a conversion foundation base (52);

step six, tower crane fall-back conversion foundation

After the construction of the conversion foundation (5) is finished, the tower crane section base falls back to the Nth layer to complete the connection foundation conversion;

seventhly, installing wall-attached pull rods and jacking sleeve frame

When the tower crane section (4) reaches a specified height, installing a wall-attached pull rod and a tower crane jacking sleeve frame on the upper part of the tower crane section (4);

step eight, dismantling the clamping assembly and converting the temporary structure

And (3) removing the clamping assembly (6) and the temporary conversion structure (9) by using another tower crane in cooperation with the chain block chain, so as to complete the whole conversion of the tower crane foundation.

8. The construction method of the core tube tower crane high-altitude conversion system of the super high-rise building according to claim 7, wherein for the step one, after the binding of the core tube (1) and the main structure steel bars is completed, and before the closing of the concrete template, the embedded part (11) is fixed at the marked axis and elevation of the design drawing by spot welding, and the deviation is not more than 5 mm; measuring the positioning data again after the template reinforcement is finished, and adjusting immediately if the deviation is more than 5 mm;

an embedded part (11) is buried in the core tube shear wall (2) at the position of 1.5-1.8 m above the bearing clamping beam (61) and is used for converting a temporary structure (9) and fixing points of a manual hoist during installation of the clamping assembly (6).

9. The construction method of the high-altitude conversion system of the core tube tower crane of the super high-rise building according to claim 8, characterized in that in the fifth step, when the conversion foundation (5) of the Nth floor is installed, the lower part of the lowest inner climbing support beam is transported to the Nth floor, the Nth floor is provided with the conversion foundation (5) in a erecting way, and the center distance of the conversion foundation (5) is ensured to be matched with the center distance of the main limb of the tower crane section (4); connecting the lower part of an inner climbing base section in a tower crane section (4) with a detachable foundation of the tower crane, directly dropping the detachable foundation in the tower crane section (4) above a newly erected conversion foundation (5), adjusting the verticality of the tower crane to meet the requirement, clamping a jacking bolt of an inner climbing frame, and welding the detachable foundation with the newly erected conversion foundation (5);

wherein, install stress sensor and strain sensor at conversion basis (5) bottom, the change of real time monitoring stress and displacement to be connected with controlling means and be used for the early warning after setting for the limit threshold value.

10. The construction method of the high-altitude conversion system of the core tube tower crane of the super high-rise building as claimed in claim 9, wherein for step seven, the tower crane jacking sleeve frame is installed after the tower crane joint base is rooted again on the conversion foundation (5); jacking sleeve frames are mutually installed through adjacent tower cranes, and meanwhile, the jacking sleeve frames need to be matched by virtue of chain blocks; when the jacking sleeve frame is installed, the opening direction of the jacking sleeve frame, namely the introduction direction of the standard knot, is determined according to the jacking step direction of the tower crane on site.

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