CN108019040B - A construction method for the Bailey frame platform of the transfer floor of a high-rise building - Google Patents

Abstract

The present invention relates to a kind of high-rise building transfer floor Bailey bracket platform construction methods, belong to technical field of building construction.This method mainly includes installation lattice column, sets up Bailey beam, lift I-beam, build big beam form bottom, sandwich boards for construction plate, construction conversion layer step.Compared with prior art, easy to implement, safe and reliable present invention can ensure that under the premise of quality, there are many remarkable advantages.

Description

A construction method for the Bailey frame platform of the transfer floor of a high-rise building

technical field

The invention relates to a building transfer floor belay frame platform, in particular to a high-rise building transfer floor bere frame platform, and also relates to a construction method, which belongs to the technical field of building construction.

Background technique

High-rise buildings often need to build transfer floor beret platforms due to structural changes between floors.

According to the search, the Chinese invention patent with the application number of 201010135856.1 discloses a construction method for the transfer floor of a high-rise building beam structure. , easy quality control, low cost, and convenient construction. However, in fact, because the transfer floor is full of scaffolding, and the supporting formwork is made of wooden keels, it not only requires a lot of labor and materials, but also has the following problems: 1) It needs to be installed on the ground floor and the first floor (-2, -1, 1) It is difficult to ensure that the vertical poles of the support system on each floor are at the same position when erecting a three-story full hall support frame, and the force is not good; 2) The full hall support frame on the basement floor must be removed when the beam-slab concrete on the first floor reaches the design strength, thus affecting the conversion 3) It is only applicable to the transfer floor in the lower floor (such as the second floor).

The Chinese invention patent with the application number 201410337666.6 discloses a construction method of a Bailey beam suspended formwork support system, which includes a vertical and horizontal force truss composed of Bailey beams; A two-way I-beam load-bearing platform is suspended through the bottom formwork of the concrete layer structure; a steel pipe scaffolding formwork support system is provided above the platform, and the transverse Bailey beams are vertically arranged on the longitudinal Bailey beams at intervals, and the longitudinal Bailey beams support On framed structures or temporary supports. The construction method includes: pre-erecting the suspension system of the Bailey beam formwork support system on the upper part of the additional floor, and laying the formwork support operating platform below. Its advantage is that it does not occupy the construction site, and is suitable for the construction of cast-in-place concrete for reinforced concrete or steel composite structures such as air corridors, tall atriums, and transfer floor projects, especially for addition projects that do not have a stress relationship with the original structure. Practice has shown that the above prior art has the following disadvantages: 1) When there is no frame support structure, it is necessary to set up temporary supports to bear the Bailey beams, which is inconvenient for construction; It is more difficult. In particular, the bottom mold of the concrete structure in the suspension system is supported on the load-bearing platform, which not only has high requirements on the quality of the rebar suspender, but is also easily affected by the construction load, because the quality of the suspender directly affects the "load bearing" of the suspension of the flat rebar suspender. The stability of the "platform", and the suspender structure has very limited ability to withstand the horizontal impact generated during the construction process and pouring concrete, so it is difficult to maintain stability, which not only affects the construction quality, but also poses certain safety hazards.

SUMMARY OF THE INVENTION

The object of the present invention is: aiming at the problems existing in the prior art, propose a kind of not only convenient to implement, easy to guarantee the quality, but also safe and reliable construction method of high-rise building transfer floor Bailey frame platform.

In order to achieve the above object, the construction method of the Bailey frame platform of the high-rise building transfer layer of the present invention comprises the following basic steps:

The first step is to install lattice columns - install lattice columns distributed at intervals on both sides of the building foundation corresponding to the positions below the transfer floor girders, and the tops of the columns are flush with the floors to be converted;

The second step is to erect the Bailey beams - hoisting and erecting a group of Bailey beams respectively supported on the lattice columns on the same side and on the floor to be converted;

The third step is to hoist the I-beam - hoisting and erecting a group of I-beams that are fixed on the Bailey beam and perpendicular to it. cantilevered scaffolding;

The fourth step is to build the bottom of the girder formwork—support the jacking brackets distributed at intervals on the I-beam, and place flat steel pipes on the top of the jacking brackets to support the girder and the interlayer pouring formwork respectively;

The fifth step, building interlayer slabs - build the girder pouring formwork on the steel pipe supporting the flat frame and the interlayer pouring formwork connected between the middle parts of the girder pouring formwork on both sides, and place the I-beam in the girder pouring formwork, and tie it up Concrete is poured after the reinforcement, and the girder pouring formwork is poured to half the height;

Step 6: Construction of the transfer layer——support the interval-distributed jacking brackets on the poured sandwich panels and high-span I-beams, and place the flat-frame steel pipes supporting the transfer layer pouring formwork on the top of the jacking brackets, and then construct the connection in the The formwork is poured in the transfer layer between the upper part of the girder pouring formwork on both sides, and the steel bars are bound in the transfer layer pouring formwork, and the concrete is poured together with the upper part of the girder.

Compared with the prior art, the method of the present invention does not need to set up a full hall support frame, the load-bearing shape is ideal, it is easy to guarantee the construction period of the transfer floor, and is not limited by the location of the transfer floor; and it is easy to implement, and the Bailey formed by supporting The platform is stable and reliable, which can guarantee the quality and construction safety.

The further improvement of the present invention is that the lattice columns of the first step are spliced section by section from bottom to top using the standard tower section of the tower crane; when splicing and installing, a tool-type operating platform is used, and the operating platform is formed by solid connection of profiles. The "concave" shaped table top frame, the upper surface of the frame is covered with a fixed cover plate, the inner profile of the opening of the frame matches the outer profile of the standard tower section, and the outer periphery of the upper surface is welded to fix the guardrail.

A further improvement of the present invention is that in the fourth step, each jacking bracket is composed of a support rod with an internal thread on the upper part and a support rod screwed into the internal thread, and the top of the support rod is fixedly connected to the steel pipe supporting the flat frame. The support heads of each support are fixedly connected by upper and lower horizontal bars distributed at intervals to form a frame structure.

Description of drawings

Fig. 1 is a schematic structural diagram of steps for installing lattice columns according to an embodiment of the present invention.

Figure 2.1 is a schematic structural view of the operating platform for installing lattice columns in the embodiment of Figure 1.

Figure 2.2 is a schematic diagram of the top view of Figure 2.1.

Figure 2.3 is the A-direction view of Figure 2.2.

Fig. 3 is a schematic diagram of the structure of the Bailey frame used in the embodiment of Fig. 1 .

Fig. 4 is a schematic diagram of the steps of erecting the Bailey beam in the embodiment of Fig. 1 .

Fig. 5 is a schematic diagram of the steps of hoisting the I-beam in the embodiment of Fig. 1 .

Fig. 6 and Fig. 7 are schematic diagrams of the steps of building the bottom of the girder mold in the embodiment of Fig. 1 .

Figures 8.1 to 8.7 are schematic diagrams of the binding process of the girder reinforcement in the embodiment of Figure 1 .

Fig. 9 is a schematic diagram of the steps of building sandwich panels in the embodiment of Fig. 1 .

Fig. 10 is a schematic diagram of the construction steps of the transfer layer in the embodiment of Fig. 1 .

Detailed ways

Example 1

The transfer floor of the high-rise building of this embodiment is located above the ninth floor, with a mezzanine on one side and no mezzanine on the other side. The construction method of the Bailey platform platform is as shown in the figure, and it is constructed according to the following steps:

The first step is to install the lattice column - as shown in Figure 1, on the two sides of the lattice column foundation 1-2 that is integrated with the building foundation 1-1, the position below the beam of the transfer floor is respectively passed through the pre-buried foundation The bolts 1-3 are installed with lattice columns 1 distributed at intervals, and the lattice columns 1 of this embodiment adopt the standard tower sections 1-4 of the tower crane to be spliced section by section from bottom to top;

When splicing and installing, use the tool-type operating platform 2 shown in Figure 2.1, Figure 2.2, and Figure 2.3. The tool-type operating platform 2 has a "concave"-shaped table top frame 2-1 welded by channel steel profiles. The frame 2 -1 The upper surface is covered with a fixed checkered steel plate 2-2, the inner profile of the opening matches the outer profile of the standard tower section, and the outer periphery of the upper surface is welded with a guardrail 2-3 made of fixed steel pipes; one end of the enclosure 2-1 is welded and fixed on the outside Two cantilever beams 2-4 protruding into the opening towards the opening direction, horizontal ear plates 2-5 with holes are respectively welded and fixed on both sides of the opening ends, and vertical ear plates 2 with holes are welded and fixed at intervals on the outer circumference -6; When in use, install the tool-type operating platform 2 on the outside of the installed standard tower section, lift it with the help of lug plates and connect it with the installed standard tower section, and insert the cantilever beam into the installed standard tower section for safety. Guarantee function; after the current lattice column section is installed and fixed in place, move the operating platform up to the top, and then the installation of the previous section of lattice column section can be carried out; this cycle continues until the column top of the lattice column reaches the desired level. Elevation, very convenient and safe.

The second step is to erect Bailey beams—as shown in Figure 3 and Figure 4, hoist and erect a group of Bailey beams 3 respectively supported on the lattice column 1 on the same side and the floor L to be converted; The two ends of the beam 3 can be rested on corresponding fixed steel corbels on site.

The third step, hoisting the I-beam—as shown in Figure 5, hoisting and erecting a group of I-beams 5 that are fixed on the Bailey beam and perpendicular to it with a spacing of 400mm at both ends. Lay safety protection layer on 5, and the protection layer of the present embodiment is specifically made of big eye safety net 5-1, expanded metal mesh 5-2 (grid 30x40mm, wire diameter 2.0mm) on it, frame on the expanded metal mesh 5-2 The criss-cross interval steel pipes (ф48x wall thickness 3.6mm) 5-3, 5-4, and the steel grid 5-5 (commonly known as steel bars) on the criss-cross interval steel pipes are composed of 5-1. It plays a role of safety protection for the personnel on the operating platform. 5-2 mainly prevents small tools from falling, and 5-3 and 5-4 mainly protect larger surrounding materials from falling. At the same time, as shown in Figure 6, in the future, a cantilevered scaffold 6 will be built at the overhanging end on the side with interlayer, and a high-span I-beam 4 will be fixed in the area without interlayer on the other side.

The fourth step is to build the bottom of the beam formwork—as shown in Figure 7, support the jacking brackets 7-1 distributed at intervals on the I-beam 5, and each jacking bracket 7-1 is formed by a strut 7-D with an internal thread on the upper part. It is composed of a support rod 7-U screwed into the internal thread, so it can be adjusted within a certain range as needed. The top of the support rod 7-U is fixedly connected to the support head of the flat frame steel pipe 7-2, and each support 7-2 -1 are fixedly connected by horizontal bars 7-3 distributed up and down to form a frame structure; flat frame steel pipes 7-2 are used to support the girder and interlayer pouring formwork; the jacking distance of the supporting girder is smaller than that of the supporting interlayer, So as to form a reasonable bearing capacity.

The 5th step, construction interlayer board -- as shown in Figure 9, construct the girder pouring formwork and the interlayer pouring formwork connected between the middle part of the girder pouring formwork on both sides on the jacking 7-1 supporting the flat frame steel pipe 7-2; The construction process is shown in Figure 8.1 to Figure 8.7:

Step 1. Lay the bottom reinforcement of the beam - as shown in Figure 8.1, lay the bottom reinforcement (ie bottom reinforcement) 9-1 distributed at intervals at the bottom of the girder pouring formwork, and support the beam pad (commonly known as stirrup) 9-2;

Step 2. Hoisting the girder—as shown in Figure 8.2, hoist the I-shaped girder 9 to the middle of the girder pouring formwork, and cut off the girder pad 9-2 after welding and fixing;

Step 3, Laying Beam Gluten—As shown in Figure 8.3, lay gluten 9-3 distributed at intervals above the I-beam 9 in place;

Step 4, passing through the waist bars of the beam - as shown in Figure 8.4, lay the side bars 9-4 distributed on both sides of the girder pouring formwork and both sides of the middle part of the I-shaped girder 9, and hook the corresponding side bars through the elbows at both ends 9-4 are distributed at intervals and the waist ribs 9-5 are welded with the I-shaped girder 9 to form a rib-shaped structure;

Step 5. Binding the stirrups—as shown in Figure 8.5, the binding intervals are distributed around the stirrups 9-6 of the cross-section of the girder pouring formwork;

Step 6, beam sealing side formwork - as shown in Figure 8.6, close the girder and pour all the side formwork 9-7, leaving the pouring opening, and the lower part of the side formwork 9-7 is used to pass through the two sides to clamp the wooden square 9-9. Bolt 9-8 reinforcement;

Step 7, girder pouring - as shown in Figure 8.7, pour concrete, and pour the girder pouring formwork to half the height;

At the same time, concrete is poured after binding steel bars in the interlayer pouring formwork as usual.

Step 6: Construction of the transfer layer—as shown in Figure 10, support the jacking brackets distributed at intervals on the poured sandwich panel G and the high-span I-beam 4, and place the supporting transfer layer pouring formwork on the top of the jacking brackets. After the steel pipes are flattened, the transfer layer pouring formwork connected between the upper part of the girder pouring formwork on both sides is constructed, and the steel bars are bound in the transfer layer pouring formwork, and the concrete is poured together with the upper part of the girder.

Practice has proved that compared with the prior art, this embodiment is not only convenient and efficient, safe and reliable, and can guarantee quality, but also has the following significant advantages:

1. In this embodiment, about 277 tons of lattice columns, Bailey beams, and I-beams are used in the transfer floor, and about 1,044 tons of steel are needed if traditional full-house scaffolding is used to erect high formwork, so the effect of saving peripheral materials is remarkable.

2. The tool-type operating platform is easy to use, safe and reliable. It can not only be used repeatedly when installing the same lattice column, but also can be used alternately between lattice columns.

3. When using the traditional full hall scaffolding to set up high formwork, it will prolong the demolition time of the first floor, -1 floor, and -2 floor, and affect the decoration progress of the basement; and the method of this embodiment will not prolong the first floor at all. , -1 floor, -2 floor demoulding time will not affect the progress of decoration.

4. The erection of traditional scaffolding requires a large amount of space to stack surrounding materials, which increases the load of the tower crane and affects the construction of other processes; however, the Bailey frame of this embodiment requires significantly less space, and can be stacked within the radius of the tower crane, and the assembly is completed After that, it is directly hoisted to the construction floor, which greatly facilitates the construction.

5. The total weight of the Bailey frame used in this embodiment is only 1/4 of that of the high-support formwork, and the time for assembly and disassembly is significantly shortened, and the difficulty of safety protection is also significantly reduced.

Claims (4)

1. a kind of high-rise building transfer floor Bailey bracket platform construction method, it is characterised in that the following steps are included:

The first step, installation lattice column --- distinguish installation interval in the position below the corresponding conversion layer crossbeam of building basis two sides The lattice column of distribution, capital are extremely concordant with floor to be converted；

Second step sets up Bailey beam --- and lifting sets up one group of shellfish thunder being respectively supported on ipsilateral lattice column and floor to be converted Beam；

Third step, lifting I-beam --- lifting sets up and is fixed on the interval that in Bailey beam and one group of both ends normal thereto are overhanging It is distributed I-beam, safe protective covering is laid on I-beam and overhanging end builds builder's jack；

4th step builds big beam form bottom --- and the vertical jacking being spaced apart is propped up on I-beam, and is disposed at the top of jacking and propped up respectively Support the flatrack steel pipe of crossbeam and interlayer formwork for placing；

5th step, sandwich boards for construction plate --- beam placement template is constructed on jacking support flatrack steel pipe and to be connected to two sides big Interlayer formwork for placing between in the middle part of beam formwork for placing, and I-girder is disposed in beam placement template, after having bound reinforcing bar Casting concrete, beam placement template are poured to half height；

6th step, construction conversion layer --- in the sandwich plate and height poured across the vertical jacking being spaced apart of branch on I-steel, and At the top of the jacking after the flatrack steel pipe of placement support conversion layer formwork for placing, building be connected to two sides beam placement template top it Between conversion layer formwork for placing, and reinforcing bar has been bound in conversion layer formwork for placing, together with crossbeam top casting concrete.

2. high-rise building transfer floor Bailey bracket platform construction method according to claim 1, it is characterised in that: described first The lattice column of step is spliced section by section from bottom to top using the standard tower section of tower crane；When splicing installation, using tool-type operating platform, institute Concave table top peripheral frame made of operating platform is connected with profile is stated, the peripheral frame upper surface covers fixed cover board, described The wide gabarit with standard tower section matches in the opening of peripheral frame, and guardrail is welded and fixed in the upper surface periphery.

3. high-rise building transfer floor Bailey bracket platform construction method according to claim 2, it is characterised in that: the described 4th In step, each jacking is made of top tool internal thread strut and the pressure pin being screwed in internal screw thread, and the top of the pressure pin is connected The prop head of bracketing flatrack steel pipe is connected between the strut of each jacking by the cross bar being spaced apart above and below, constitutes frame structure.

4. high-rise building transfer floor Bailey bracket platform construction method according to claim 3, it is characterised in that: the described 5th In step, the construction progress step of crossbeam are as follows:

Step 1: paving beam bottom muscle --- it is laid with the bottom muscle of beam placement template bottom interval distribution, and installs beam pad；

Step 2: lifting crossbeam --- I-girder is lifted into the middle part of beam placement template in place, prescinds beam after being welded and fixed Pad；

Step 3: paving beam gluten --- the gluten being spaced apart is laid with above I-girder in place；

Step 4: wearing beam waist muscle --- it is laid with the side muscle that beam placement template two sides and I-girder on both sides of the middle are spaced apart, And by both ends elbow respectively hook around corresponding side muscle be spaced apart waist muscle and I-girder weldering connect, constitute rib cage shape structure；

Step 5: binding stirrup --- binding is spaced apart the stirrup around beam placement template section；

Step 6: envelope beam side --- closing all Side shutterings of beam placement, Side shuttering lower part is with across sandwich wood The split bolt of side is reinforced；

Step 7: beam placement --- casting concrete is poured to half height in beam placement template.