Overhanging floor end suspension structure and construction method thereof

Abstract

A kind of overhanging floor end suspension structure and its construction method, including node floor, outer frame and derrick, multiple overhanging floor plates are arranged between adjacent node floors, outer frame is arranged outside node floor and overhanging floor plate, the lower end of outer frame is rooted on the concrete column of basement by foot embedded part, outer frame is connected core tube by the steel beam of node floor, one end of derrick is connected to the steel beam of node floor close to the end of outer frame, the other end of derrick is connected to the overhanging end of overhanging floor plate, gap is left between overhanging floor plate and outer frame and is not connected.This application has the effect of improving the overall seismic capacity of building.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a cantilevered floor end suspension structure and a construction method thereof. BACKGROUND

[0002] With the development of technology, in the field of modern building construction, high-rise buildings gradually increase. In order to be beautiful or process requirement, the high-rise building is often designed with an outer cantilever structure at the middle and upper part of the main structure of the high-rise building. The outer cantilever structure is usually realized by relying on an outer cantilever steel structure truss.

[0003] In the prior art, the end of the outer cantilever structure is generally connected to the core tube by a pull rod to keep the outer cantilever structure stable. However, the vibration and swing of the end of the outer cantilever structure is large. In the way of connecting the end of the outer cantilever structure and the core tube by the pull rod, most of the vibration and swing of the end of the outer cantilever structure will be transmitted to the core tube through the pull rod, and then the energy of the vibration and swing of the end of the outer cantilever structure will be consumed by the core tube. This has a great impact on the core tube and reduces the overall seismic capacity of the building. SUMMARY

[0004] The present application solves the problems of the prior art and provides a cantilevered floor end suspension structure and a construction method thereof for improving the overall seismic capacity of the building.

[0005] To achieve the above-mentioned purpose, the present application first provides a cantilevered floor end suspension structure, which comprises a node floor, an outer frame and a suspender. The cantilevered floor plate is cantilevered on the outer side of the core tube. One end of the cantilevered floor plate is connected to the core tube, and the other end is suspended. The steel beam of the node floor is connected to the steel beam and the column of the core tube. A plurality of cantilevered floor plates are arranged between the two adjacent node floors,

[0006] The outer frame is arranged outside the node floor and the cantilevered floor plate. The lower end of the outer frame is embedded in the concrete column of the basement through a foot embedded part. The outer frame is fixedly connected to the outermost steel beam of the node floor away from the core tube.

[0007] Each node floor is provided with a plurality of suspenders arranged along the outer circle of the node floor on the outermost steel beam. The upper end of the suspender is fixedly connected to the outermost steel beam of the node floor. The lower end of the suspender penetrates through the suspended end of all the cantilevered floor plates between the two adjacent node floors, and the fastening nut threadedly connected to the suspender fixes each cantilevered floor plate. There is a gap between the cantilevered floor plate and the outer frame and they are not connected.

[0008] By adopting the technical scheme, the overhanging end of the overhanging floor slab is connected to the node floor above through the hanger, and the overhanging floor slab is not connected to the outer frame, so that the vibration and swing generated by the overhanging end of the overhanging floor slab is transmitted to the node floor through the hanger, and then is dispersed to the outer frame, the node floor and the core tube, since the connecting point of the hanger and the node floor is close to the outer frame, the energy of the vibration and swing is quickly dispersed to the outer frame and the node floor and is consumed, and only a small part of the vibration is transmitted to the core tube, thereby reducing the influence of the overhanging floor slab on the core tube and improving the overall seismic capacity of the building.

[0009] In the embodiment, the outer frame comprises steel columns, column nodes and outer frame beams, the column nodes are arranged at each node floor, the upper end and the lower end of each column node are provided with two interfaces, one steel column is connected to each interface, the two ends of the steel column are connected to the interfaces of the column nodes of different node floors respectively, the outer frame is connected to form a diagonal grid steel tube outer frame through the steel columns and the column nodes, the outer frame beams connect the column nodes of the same floor, the outermost steel beams of the node floor connect the column nodes and the outer frame beams, the outer frame connects the node floors through the column nodes and the outer frame beams, and the steel columns connect the column nodes of each floor, thereby forming a support structure with the outer frame, the node floor and the core tube as the skeleton to stably support the overhanging floor slab.

[0010] In the embodiment, the hanger is provided with a plurality of outer thread segments, each outer thread segment corresponds to one overhanging floor slab, and the two ends of each outer thread segment are provided with fastening nuts, the hanger is connected to the overhanging end of the overhanging floor slab through the fastening nuts, the fastening nuts can be used to adjust the tension degree of the hanger to the overhanging end of the overhanging floor slab during construction, the tension of each hanger is balanced, after the installation of all the overhanging floor slabs, the node floors and the outer frame is completed, the hanger is welded and fixed to the overhanging floor slab, or the fastening nuts are welded and fixed to the overhanging floor slab.

[0011] In the embodiment, a notch is arranged on the overhanging end of the overhanging floor slab at the position connected to the hanger, the notch is matched with the hanger in size, the hanger is installed in the overhanging floor slab through the notch, and the hanger is locked in the notch after being installed in the notch.

[0012] In the embodiment, the overhanging floor slab comprises four overhanging floor slabs with the building area decreasing from top to bottom, the building area decreases from top to bottom, so that the outermost circle of the overhanging end of the four overhanging floor slabs is inwardly retracted towards the core tube from top to bottom, and the hanger and the vertical plane are provided with an inclined angle to match the inward retraction of the overhanging end of the overhanging floor slab.

[0013] In the embodiment, the steel beam of the node floor adopts an H-shaped steel beam.

[0014] The application also comprises a construction method of the overhanging structure of the overhanging floor end, comprising the following specific steps:

[0015] S1, the adjacent node floor and the multi-layer cantilever floor slab between the adjacent node floors are taken as a construction group, when each construction group is constructed, the node floor steel beam below the cantilever floor slab is installed first, and a temporary plate is laid on the already installed node floor steel beam as a construction platform of the construction group, then the installation materials of the cantilever floor slab are hoisted to the construction platform by using a crane, and then the corresponding outer frame of the node floor above the cantilever floor slab is installed;

[0016] S2, the node floor above the cantilever floor slab is installed, and the two ends of the steel beam of the node floor are connected to the corresponding positions of the core tube and the outer frame respectively during installation;

[0017] S3, the hoisting device is installed as a support structure of the node floor above the cantilever floor slab, the position and the number of the hoisting device are determined according to actual use, the jib on the construction platform is hoisted and installed to the corresponding position of the node floor above the cantilever floor slab through the hoisting device first, and then the installation materials of the cantilever floor slab are installed through the hoisting device in sequence, during installation, the uppermost cantilever floor slab is installed first, and then the other layers of cantilever floor slabs are installed from top to bottom;

[0018] S4, repeat S1-S3, and construct the construction groups from bottom to top in sequence.

[0019] Since the cantilevered end of the cantilever floor slab is a cantilever structure, if the cantilever floor slab is installed first and then the node floor above is installed, the cantilevered end of the installed cantilever floor slab is in a state of being suspended without support structure, and needs to wait for the installation of the node floor above to be completed, and then use the jib to connect the cantilevered end of the cantilever floor slab. Before the jib connects the cantilevered end of the cantilever floor slab, the cantilevered end of the cantilever floor slab is suspended without support and is prone to deformation. Therefore, the node floor above is installed first, and then the cantilever floor slab is installed, which reduces the deformation of the cantilever floor slab and improves the installation precision and efficiency. Since the installation of the node floor above will hinder the installation of the cantilever floor slab, the installation materials of the cantilever floor slab are hoisted to the already installed node floor before the installation of the node floor above, and the hoisting device is installed as a support structure of the node floor above, which is used to hoist the cantilever floor slab, thereby reducing the hindrance of the node floor above to the hoisting of the cantilever floor slab.

[0020] Preferably, the hoisting device adopts a gourd hoist, which is convenient to operate and is conducive to improving the installation efficiency of the cantilever floor slab.

[0021] In this embodiment, in step S3, when installing the cantilevered floor slab, the cantilevered floor slab of each floor is split into a plurality of modules centered on the core tube, each module is assembled on the construction platform, then the module is hoisted to a designated position and the hoisting rod and the core tube are connected, and finally the modules are connected to each other to form the cantilevered floor slab. Since the cantilevered floor slab can be hoisted by multiple hoisting devices at the same time, the cantilevered floor slab can be split into multiple modules for installation, and the modules can be assembled on the node floor, so the installation efficiency is high.

[0022] In this embodiment, the cantilevered floor slab of each floor is uniformly split into a plurality of modules centered on the core tube, and the plurality of modules are symmetrically arranged centered on the core tube. When the cantilevered floor slab of the same floor is installed, the two symmetric modules located on both sides of the core tube are hoisted at the same time. Hoisting the symmetric modules at the same time is conducive to maintaining the force balance of the core tube.

[0023] In summary, the present application has the following beneficial technical effects:

[0024] 1. The cantilevered end of the cantilevered floor slab is connected to the node floor through the hoisting rod, and the cantilevered floor slab is not connected to the outer frame. The vibration generated by the cantilevered floor slab is transmitted to the node floor through the hoisting rod, and then dispersed to the outer frame, the node floor and the core tube. Since the connection point of the hoisting rod and the steel beam of the node floor is close to the outer frame, the energy of the vibration is quickly dispersed to the outer frame and the node floor and consumed, only a small part of the vibration is transmitted to the core tube, thereby reducing the influence of the cantilevered floor slab on the core tube and improving the overall seismic capacity of the building.

[0025] 2. The construction method of the present application installs the node floor of the upper layer first, then installs the cantilevered floor slab. After the cantilevered floor slab is installed, the hoisting rod is used to hoist and support the cantilevered floor slab, which reduces the deformation of the cantilevered floor slab, improves the installation accuracy and efficiency of the cantilevered floor slab, and the installation materials of the cantilevered floor slab are hoisted to the already installed node floor before the installation of the node floor of the upper layer, and the hoist is installed as a supporting structure on the node floor of the upper layer for hoisting the cantilevered floor slab, which reduces the adverse effects of the node floor of the upper layer on the hoisting of the cantilevered floor slab, and is conducive to improving the installation efficiency of the cantilevered floor slab. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a front view of the present application.

[0027] Figure 2 is a perspective view of the present application.

[0028] Figure 3 is Figure 2 is a partial enlarged view of A in

[0029] In the drawings, 1 is an outer frame; 11 is a steel column; 12 is a column joint; 13 is an outer frame beam; 2 is a joint floor; 3 is a suspender; 4 is a cantilevered floor slab; 5 is a core tube; and 6 is a fastening nut. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] In addition, the technical solutions in the various embodiments of the present application can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize the combination. When the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0032] Referring to Figure 1 and Figure 2 , a cantilevered floor end suspension structure includes a joint floor 2, an outer frame 1, and a suspender 3. A cantilevered floor slab 4 is cantilevered outside a core tube 5, and one end of the cantilevered floor slab 4 is connected to the core tube 5, and the other end is provided in a suspended manner.

[0033] One joint floor 2 is provided every five floors. Steel beams of the joint floor 2 connect steel beams and columns of the core tube 5. Four cantilevered floor slabs 4 with gradually decreasing floor areas from top to bottom are provided between two adjacent joint floors 2.

[0034] The outer frame 1 surrounds the joint floor 2 and the cantilevered floor slab 4. The lower end of the outer frame 1 is embedded in a concrete column of a basement through a foot embedded part. The outer frame 1 is fixedly connected to one end of the steel beam of the joint floor 2 away from the core tube 5. The outer frame 1 is connected to the core tube 5 through the steel beam of the joint floor 2. The steel beam of the joint floor 2 is an H-shaped steel beam.

[0035] A plurality of suspenders 3 are provided below each joint floor 2. The suspenders 3 are arranged in a tilted manner to match the gradual change of the floor area of the cantilevered floor slab 4. The plurality of suspenders 3 are arranged around the end of the cantilevered floor slab 4. The upper end of the suspender 3 is connected to one end of the steel beam of the joint floor 2 close to the outer frame 1. Each suspender 3 sequentially passes through the suspended end of the four cantilevered floor slabs and fixes the cantilevered floor slab to the suspender 3 through the fastening nut 6 threadedly connected to the suspender 3. A gap is left between the cantilevered floor slab 4 and the outer frame 1, and the cantilevered floor slab 4 is not connected to the outer frame 1.

[0036] Referring to Figure 3The outer frame 1 comprises steel columns 11, column nodes 12 and outer frame beams 13. In this embodiment, the column nodes 12 are saddle-shaped (here, the saddle-shaped structure refers to a structure in which two symmetrical arc-shaped pipes are connected by a straight pipe in the middle, and the openings of the arc-shaped pipes are arranged opposite to each other), and the column nodes 12 are arranged at each node floor 2. The upper end and the lower end of each column node 12 are provided with two interfaces, and each interface is connected with a steel column 11. The two ends of the steel column 11 are connected with the interfaces of the column nodes 12 of the node floors 2 at different levels, respectively. The outer frame 1 is connected by the steel columns 11 and the column nodes 12 to form a diagonal grid steel pipe outer frame, and the diagonal grid steel pipe outer frame is in the shape of a rhombic grid. The outer frame beams 13 are connected between the column nodes 12 at the same level. The steel beams of the node floors 2 are connected with the column nodes 12 and the outer frame beams 13.

[0037] With reference to Figure 3 The suspender 3 is provided with four external thread segments, each of which corresponds to a cantilever floor slab 4. The two ends of each external thread segment are provided with a fastening nut 6. The suspender 3 is connected with the cantilever floor slab 4 by the fastening nut 6. During construction, the suspender 3 can be adjusted to balance the tension of each suspender 3 by adjusting the tension of the suspender 3 on the cantilever end of the cantilever floor slab 4. After the installation of all the cantilever floor slabs 4, the node floors 2 and the outer frame 1 is completed, the suspender 3 and the cantilever floor slab 4 are welded and fixed, or the fastening nut 6 and the cantilever floor slab 4 are welded and fixed. In order to facilitate the connection between the cantilever floor slab 4 and the suspender 3, a notch is arranged at the connection between the cantilever floor slab 4 and the suspender 3. After the suspender 3 is inserted into the notch, a steel plate is welded to close the notch.

[0038] The shock absorption principle of the present application is as follows:

[0039] The cantilever end of the cantilever floor slab 4 is connected with the node floor 2 by the suspender 3, and the cantilever floor slab 4 is not connected with the outer frame 1. The vibration and swing generated by the cantilever end of the cantilever floor slab 4 is conducted to the node floor 2 through the suspender 3, and then dispersed to the outer frame 1, the node floor 2 and the core tube 5. Since the connecting point of the suspender 3 and the node floor 2 is close to the outer frame 1, the energy of the vibration and swing is quickly dispersed to the outer frame 1 and the node floor 2 and consumed, and only a small part of the vibration is conducted to the core tube 5, thereby reducing the influence of the cantilever floor slab 4 on the core tube 5 and improving the overall seismic capacity of the building.

[0040] The present application also discloses a construction method of a cantilever floor end suspension structure, comprising the following steps:

[0041] S1, the adjacent node floors 2 and the cantilever floor slabs 4 between the adjacent node floors 2 are taken as a construction group. When each construction group is constructed, the node floor 2 steel beam below the cantilever floor slab 4 is installed first, a temporary plate is laid on the already installed node floor 2 steel beam as a construction platform of the construction group, and a hoist is used to hoist the installation materials of the cantilever floor slab 4 to the construction platform.

[0042] Temporary board blocks installation materials from falling and colliding with the node floor 2.

[0043] The installation materials include steel components, fasteners, hoists, welding tools and handling tools, and the hoists are used to hoist each hoist rod 3 to the node floor 2 that has been installed using a crane.

[0044] The node floor 2 above the cantilever floor slab 4 is installed corresponding to the outer frame 1, and the hoisting and installation of the installed hoist rod 3 and the installation materials are mutually avoided. In order to avoid the hoisting of the materials colliding with the installed outer frame 1, the placement position of the installation materials is not less than 3m away from the installed outer frame 1.

[0045] S2, the node floor 2 above the cantilever floor slab 4 is installed, the steel beam of the node floor 2 above the cantilever floor slab 4 is directly hoisted to the installation position from the ground using a crane, and then the two ends of the steel beam of the node floor 2 are connected to the corresponding positions of the core tube 5 and the outer frame 1.

[0046] S3, after the installation of the node floor 2 above the cantilever floor slab 4 is completed, the hoist is installed taking the node floor 2 above the cantilever floor slab 4 as the support structure, the position and number of the hoist are determined according to the actual use, and each hoist rod 3 is hoisted to the corresponding position of the node floor 2 above the cantilever floor slab 4 through the hoist. The position and angle of the hoist rod 3 are easily controlled through the hoist, which improves the installation efficiency and precision.

[0047] Then the installation materials of each cantilever floor slab 4 between the two node floors 2 are hoisted and installed by the hoist. During installation, the cantilever floor slab 4 of the upper layer is installed first, and then other cantilever floor slabs 4 are installed from top to bottom. The installation method of the cantilever floor slab 4 is as follows: each cantilever floor slab 4 is divided into multiple modules for installation, each module has a structure connecting the hoist rod 3 and the core tube 5, each module is assembled on the node floor 2 where the installation materials are placed, then each module is hoisted to the designated position through the hoist, then the module is connected to the hoist rod 3 and the core tube 5, and finally each module is connected to each other. The module assembly and hoisting are symmetrically performed, two modules located at the symmetric positions on both sides of the core tube 5 are hoisted at the same time in order to keep the force balance of the core tube 5. When the module is assembled, other installation materials that cause interference need to be moved to other positions.

[0048] If the use of the hoist is interfered by the installed cantilever floor slab 4 of the upper layer, a hanger is used to connect the node floor 2 above the cantilever floor slab 4 and extend to the lower side of the cantilever floor slab 4 of the upper layer, and then the hoist is installed on the hanger.

[0049] S4, repeat S1-S3, and sequentially install the outer frame 1, the node floor 2 and the cantilever floor slab 4 upwards until the set height is reached, and the top floor is the node floor 2.

[0050] The implementation principle of the construction method is:

[0051] The node floor 2 above the cantilever floor slab 4 is installed first, and then the cantilever floor slab 4 below the node floor 2 is installed. During the installation of the cantilever floor slab 4, the cantilever end of the cantilever floor slab 4 is connected by the suspender 3 to pull up the cantilever end of the cantilever floor slab 4, thereby reducing the deformation of the cantilever floor slab 4 and improving the installation accuracy and efficiency of the cantilever floor slab 4. However, after the node floor 2 above the cantilever floor slab 4 is installed, the installation space of each cantilever floor slab 4 below is limited, and it is not convenient to use the crane to hoist the installation materials of each cantilever floor slab 4. Therefore, the installation materials of the cantilever floor slab 4 are hoisted to the already installed node floor 2 before the installation space of the cantilever floor slab 4 is limited, and then the hoist is installed as a support structure above the cantilever floor slab 4. The hoist is used to hoist the installation materials of the cantilever floor slab 4, thereby solving the problem of inconvenient hoisting of installation materials caused by the limitation of the installation space of the cantilever floor slab 4 by the node floor 2 above the cantilever floor slab 4. In addition, the hoist is easy to operate, which is conducive to improving the installation efficiency of the cantilever floor slab 4.

[0052] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent transformation made under the concept of the present application, using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A cantilevered floor end suspension structure, characterized in that: This includes node floors, the outer frame, and hangers. Cantilevered floor slabs extend beyond the core tube, with one end connected to the core tube and the other end suspended in the air. Steel beams at the node floors connect the steel beams and columns of the core tube. Multiple layers of cantilevered floor slabs are installed between adjacent node floors. The outer frame is set around the node floor and the cantilever floor slab. The lower end of the outer frame is embedded in the concrete column of the basement through anchor bolts. The outer frame is fixedly connected to the outermost steel beam at the end of the node floor away from the core tube. Each node floor has multiple hangers arranged along the outer ring of the node floor on the outermost steel beam. The upper end of the hanger is fixedly connected to the outermost steel beam of the node floor, and the lower end of the hanger passes through the cantilevered ends of all the cantilever floor slabs between two adjacent node floors. Each cantilever floor slab is fixed to the hanger by the fastening nut threaded on the hanger. There is a gap between the cantilever floor slab and the outer frame and they are not connected. The outer frame includes steel columns, column nodes, and outer frame beams. Column nodes are set on each node floor. Each column node has two interfaces at its upper and lower ends, and each interface connects to a steel column. The two ends of the steel column are connected to the interfaces of column nodes on different node floors. The outer frame is formed by connecting steel columns and column nodes to form a diagonal grid steel tube outer frame. The outer frame beams connect the column nodes on the same floor. The outermost steel beam of the node floor connects the column nodes and the outer frame beam.

2. The cantilevered floor end suspension structure according to claim 1, characterized in that: The hanger has multiple external threaded sections, each corresponding to a cantilevered floor slab. Each external threaded section has a fastening nut installed at both ends, and the hanger is connected to the suspended end of the cantilevered floor slab through the fastening nuts.

3. The cantilevered floor end suspension structure according to claim 2, characterized in that: On the cantilevered end of the floor slab, at the position where it connects with the hanger, there is a slot. The slot is matched with the size of the hanger. The hanger is installed in the cantilevered floor slab through the slot. After the hanger is installed in the slot, the slot is closed to lock the hanger in the slot.

4. The cantilevered floor end suspension structure according to claim 1, characterized in that: The cantilevered floor slab includes four cantilevered floor slabs with decreasing building area from top to bottom. The decreasing building area causes the outermost ring of the cantilevered floor slab to shrink inward toward the core tube from top to bottom. The suspension rod is at an inclined angle to the vertical plane to match the shrinkage of the cantilevered floor slab.

5. The cantilevered floor end suspension structure according to claim 1, characterized in that: The steel beams of the node floors are H-shaped steel beams.

6. A construction method for a cantilevered floor end suspension structure as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Treat adjacent node floors and the multi-layer cantilever floor slabs between adjacent node floors as a construction group. When constructing each construction group, first install the node floor steel beams below the cantilever floor slab, and lay temporary boards on the already installed node floor steel beams as the construction platform of the construction group. Then use a crane to lift the installation materials of the cantilever floor slabs onto the construction platform, and then install the outer frame corresponding to the node floor above the cantilever floor slabs. S2. Install the node floors above the cantilever floor slabs. During installation, connect the two ends of the steel beams of the node floors to the corresponding positions of the core tube and the outer frame, respectively. S3. Install hoisting devices using the node floors above the cantilever floor slabs as the supporting structure. The location and number of hoisting devices are determined according to the actual usage. First, use the hoisting devices to lift the rods on the construction platform and install them to the corresponding positions of the node floors above the cantilever floor slabs. Then, install the installation materials of the cantilever floor slabs by hoisting them one by one. When installing, first install the uppermost cantilever floor slab, and then install the cantilever floor slabs of other floors from top to bottom. S4. Repeat S1-S3, and construct each construction group sequentially from bottom to top.

7. The construction method of the cantilevered floor end suspension structure according to claim 6, characterized in that: The hoisting device used is a hoist.

8. The construction method of the cantilevered floor end suspension structure according to claim 6, characterized in that: In step S3, when installing the cantilever floor slab, each cantilever floor slab is divided into multiple modules with the core tube as the center for installation. First, each module is assembled on the construction platform, then the module is lifted to the set position and connected to the suspension rod and the core tube, and finally the modules are connected to each other to form the cantilever floor slab.

9. The construction method of the cantilevered floor end suspension structure according to claim 8, characterized in that: Each cantilevered floor slab is evenly divided into multiple modules with the core tube as the center, and the multiple modules are symmetrically arranged with the core tube as the center. When the cantilevered floor slab on the same floor is installed, the two symmetrical modules located on both sides of the core tube are hoisted at the same time.

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