Construction method of double-layer H-shaped steel transfer layer with limited construction space

Abstract

The invention relates to a construction method of a double-layer H-shaped steel transfer layer with limited construction space, which adopts a lower hanging post-steel beam installation and angle inclination hoisting technology, obviously improves the stability in the installation process, reduces the time wasted by repeatedly adjusting the position, and greatly improves the installation efficiency. According to the technology, the construction period is effectively shortened, and the labor cost is reduced; an integrated auxiliary installation support and operation platform structure is adopted, it is guaranteed that the position of the steel beam is accurate in the installation process, the installation stability is further enhanced, the deviation problem in the installation process is effectively avoided, and the overall installation precision is improved; by obliquely lifting the upper steel beam and the lower steel beam, the problems that in double-layer H-shaped steel transfer layer construction with the limited construction space, the length of part of rod pieces exceeds the size of a hole, and horizontal lifting can collide with a main body structure are solved, and good technical economic and social benefits can be obtained when the method is applied to actual engineering.

Description

Technical Field

[0001] The invention belongs to the field of space steel grid structures, and in particular relates to a construction method for a double-layer H-shaped steel conversion layer with limited construction space. Background Art

[0002] With the continuous development of the construction industry, spatial steel grid structures have been widely used in construction projects. While people pursue practicality, they are also constantly seeking beautiful and unique shapes for buildings, and spatial steel grids provide convenience in this regard. Large-span steel structures are increasingly used in real life, such as large gymnasiums, theaters, etc. However, in the construction of double-layer H-shaped steel transfer layers with limited construction space, the length of some rods exceeds the size of the opening, and there is a problem that horizontal hoisting will collide with the main structure.

[0003] In summary, for the construction of double-layer H-shaped steel transfer layers with limited construction space, it is very important to seek a double-layer H-shaped steel transfer layer with limited construction space, which has fast construction speed, simple operation, and high reliable construction quality, and its construction method. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a construction method for a double-layer H-shaped steel transfer layer with limited construction space.

[0005] The construction method of the double-layer H-shaped steel transfer layer with limited construction space comprises the following steps:

[0006] Step 1: Hoist and install on the frame beam at the opening and weld the connecting sling;

[0007] Step 2: Installation of transfer beam: horizontally erect the transfer beam on the frame beam;

[0008] Step 3: Lift and install the upper steel beam: The transfer beam is hoisted to the upper steel beam by a hand chain hoist and a steel wire rope, and the two ends of the upper steel beam are fixedly connected to the suspending column and the frame beam respectively;

[0009] Step 4: Lift and install the lower steel beam: Use the same method to hoist the lower steel beam;

[0010] Step 5: Auxiliary installation of steel beams: Move the auxiliary installation bracket to the designed position and initially fix it with a guy rope; place the upper and lower steel beams in the pallet, adjust the height of the support rod with a jack, and temporarily place them for stability.

[0011] Preferably, embedded parts are provided on the top surface of the frame beam; in step 2, lifting ears are provided on the conversion beam, and short columns are provided at the end of the conversion beam crossing the opening; the lower parts of the two ends of the conversion beam are connected and fixed to the embedded parts, and the conversion beam is installed horizontally.

[0012] Preferably, embedded parts are provided on the side of the frame beam corresponding to the height of the upper steel beam. In step three, a corbel is pre-installed at one end of the upper steel beam; the hand winch is arranged on the lifting ear and is fixed to the upper steel beam by steel wire ropes of different lengths, so that the upper steel beam is first lifted at a certain inclination angle. After being lifted to a certain height without colliding with the main structure, the steel wire ropes are adjusted to the same length to make it rise horizontally to the installation position; one end of the upper steel beam is connected and fixed to the hanging column, and the other end is fixed to the embedded part by the corbel.

[0013] Preferably, in step four, a corbel is pre-installed at one end of the lower steel beam, a column is arranged on the lower steel beam, and the column is connected and fixed to the upper steel beam.

[0014] Preferably, the auxiliary mounting bracket comprises a base, a jack, a perforated steel plate, a supporting bottom plate, a supporting column, a cushion block and an operating platform; the base is provided with a pulley; an operating platform is arranged on the top of the auxiliary mounting bracket, a supporting column runs through the center of the operating platform, and a supporting rod is welded on the top of the supporting column; a clamping plate is arranged on the supporting rod; the bottom of the supporting column is supported on the supporting bottom plate; the jack is arranged between the operating platform and the lower part of the supporting rod, and guardrails are arranged around the operating platform; the perforated steel plate is located on the upper part of the auxiliary mounting bracket, and the cable wind perforated steel plate and the floor anchor are connected by a cable wind rope.

[0015] Preferably, ear plates and fixed shafts are arranged around the base, and a jack is supported under the lifting ear plates; the pulley is connected to the support rod, and the support rod is connected to the fixed shaft by bolts; a fixed sleeve, a reinforcement sleeve and a reserved hole are provided on the operating platform, and the reinforcement sleeve is located above the reserved hole, wherein the jack is located in the fixed sleeve.

[0016] Preferably, in step five, the auxiliary installation bracket is moved to the designed position, first preliminarily fixed by a guy rope, and then the ear plate is synchronously lifted by a jack to put the pulley in a stress-free state, the support rod is adjusted to move it upward, and it is lowered by the jack to make the base support the ground; after the upper steel beam and the lower steel beam are hoisted to the designed position, the upper steel beam and the lower steel beam are located in the clamping plate, and the pads are placed by adjusting the support rod with a jack to temporarily shelve them firmly, and the construction personnel are located in the operating platform to facilitate their installation.

[0017] The beneficial effects of the present invention are:

[0018] 1) The present invention adopts the hanging column-steel beam installation and angle tilt lifting technology, which significantly improves the stability during the installation process, reduces the time wasted due to repeated position adjustment, and thus greatly improves the installation efficiency. This technology effectively shortens the construction period and reduces labor costs.

[0019] 2) The present invention adopts an integrated auxiliary installation bracket and operating platform structure, which ensures the accurate position of the steel beam during the installation process, further enhances the stability of the installation, effectively avoids the offset problem during the installation process, and improves the overall installation accuracy.

[0020] 3) The present invention solves the problem that in the construction of a double-layer H-shaped steel transfer layer with limited construction space, the length of some rods exceeds the size of the opening, and horizontal lifting will collide with the main structure by tilting the upper steel beam and the lower steel beam. It can achieve better technical, economic and social benefits when applied to actual projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the plan layout of the transfer beam;

[0022] Figure 2 This is a schematic diagram of the transfer beam sample;

[0023] Figure 3 This is a schematic diagram of the installation of the suspension column;

[0024] Figure 4 It is a schematic diagram of the installation of the replacement beam;

[0025] Figure 5 This is a schematic diagram of the upper steel beam lifting installation;

[0026] Figure 6 This is a schematic diagram of the lower steel beam lifting installation;

[0027] Figure 7 This is a schematic diagram of the completed installation of the transfer layer steel beam;

[0028] Figure 8 is a schematic diagram of the auxiliary mounting bracket;

[0029] Fig. 9 This is a schematic diagram of the top of the auxiliary mounting bracket;

[0030] Fig.10 This is a schematic diagram of the operating platform.

[0031] Explanation of the accompanying drawings: 1-concrete column, 2-frame beam, 3-opening, 4-conversion beam, 5-lifting ear, 6-short column, 7-hanging column, 8-embedded parts, 9-wall, 10-hand hoist, 11-wire rope, 12-upper steel beam, 13-corbel, 14-lower steel beam, 15-column, 16-auxiliary mounting bracket, 17-base, 18-ear plate, 19-fixed shaft, 20-support rod, 21-pulley, 22-jack, 23-square steel, 24-steel plate with holes, 25-support bottom plate, 26-support column, 27-pad, 28-operating platform, 29-clip plate, 30-support rod, 31-fixed sleeve, 32-reinforcement sleeve, 33-guardrail, 34-reserved hole. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0033] Embodiment 1

[0034] As an embodiment, the construction method of the double-layer H-shaped steel transfer layer with limited construction space has the following main construction steps:

[0035] Step 1: Embedded parts construction: Figure 3 As shown, the embedded parts 8 are constructed simultaneously with the construction of the concrete column 1, the frame beam 2, the opening 3, and the wall 9.

[0036] Step 2, hoisting installation: the hanging column 7 is an I-beam component processed in the factory, and a reserved steel bar is set at the opening position frame beam 2 during construction, and the hanging column 7 is welded thereon;

[0037] Step 3: Installation of transfer beam: Figure 4 As shown, a lifting lug 5 is provided on the transfer beam 4, and a short column 6 is provided at the end across the opening; an embedded part 8 is provided on the frame beam 2; both ends of the transfer beam 4 are connected and fixed to the embedded part 8, and the horizontal installation is ensured.

[0038] Step 4: Lift and install the upper steel beam: Figure 5 As shown, the upper steel beam 12 is processed and manufactured by I-beam in the factory, and a corbel 13 is pre-installed at one end thereof; the hand chain hoist 10 is arranged on the lifting ear 5, and is fixed to the upper steel beam 12 by steel wire ropes 11 of different lengths, so that the upper steel beam 12 is first slowly lifted at a certain inclination angle, and when it is lifted to a certain height without colliding with the main structure, the steel wire rope 11 is adjusted to the same length, so that it is horizontally raised to the installation position; one end of the upper steel beam 12 is connected and fixed to the suspension column 7, and the other end is fixed to the embedded part 8 through the corbel 13.

[0039] Step 5, lifting and installing the lower steel beam: The lifting and installation method of the lower steel beam 14 refers to the upper steel beam 12; the lower steel beam 14 has a corbel 13 pre-installed at one end thereof, and a column 15 is arranged thereon, and the column 15 is connected and fixed to the upper steel beam 12.

[0040] Step 6: Auxiliary installation of steel beams: Figure 6 and Figure 7As shown, the perforated steel plate 24 is located on the upper part of the auxiliary mounting bracket 16, one end of the cable wind rope is connected to the perforated steel plate 24, and the other end is connected to the floor anchor to ensure the stability of the entire bracket; the auxiliary mounting bracket 16 moves to the designed position, is first initially fixed by the cable wind rope, and then the ear plate 18 is synchronously lifted by the jack 22, so that the pulley 21 is in a stress-free state, the support rod 20 is adjusted to move it upward, and it is lowered by the jack 22, so that the base 17 supports the ground; after the upper steel beam 12 and the lower steel beam 14 are hoisted to the designed position, the upper steel beam 12 and the lower steel beam 14 are located in the clamping plate 29, and the cushion block 27 is placed by adjusting the support rod 30 with the jack for temporary shelving and stabilization, and the construction personnel are located in the operating platform 28 to facilitate its installation.

[0041] Embodiment 2

[0042] As another embodiment, this embodiment 2 is proposed on the basis of the embodiment 1, and the construction space is limited to obtain a double-layer H-shaped steel conversion layer as described in the embodiment 1. Figures 1 to 7 As shown:

[0043] Including: concrete column 1, frame beam 2, opening 3, transfer beam 4, lifting ear 5, short column 6, hanging column 7, embedded part 8, wall 9, hand hoist 10, wire rope 11, upper steel beam 12, corbel 13, lower steel beam 14, column 15, auxiliary installation bracket 16, base 17, ear plate 18, fixed shaft 19, support rod 20, pulley 21, jack 22, square steel 23, perforated steel plate 24, support bottom plate 25, support column 26, cushion block 27, operating platform 28, clamping plate 29, support rod 30, fixed sleeve 31, reinforcement sleeve 32, guardrail 33, reserved hole 34; developed a double-layer H-shaped steel transfer layer structure with limited construction space, the lower hanging column-steel beam installation technology, the temporary steel conversion beam shelving installation technology, the angle tilt lifting technology, the integrated auxiliary installation bracket and the operating platform structure.

[0044] A hanging column 7 is welded at the corresponding opening 3 of the frame beam 2, and the conversion beam 4 is horizontally erected on the top of the frame beam 2 for hanging the upper steel beam 12 and the lower steel beam 14; the upper steel beam 12 and the lower steel beam 14 are arranged up and down, and the two ends of the upper steel beam 12 and the lower steel beam 14 are fixed on the frame beams 2 or the hanging columns 7 on both sides.

[0045] like Figure 2 and Figure 3 As shown, the transfer beam 4 is provided with a lifting lug 5, and a short column 6 is provided at the end across the opening; an embedded part 8 is provided on the frame beam 2; the two ends of the transfer beam 4 are connected and fixed to the embedded part 8, and the horizontal installation is ensured. The hanging column 7 is an I-beam component processed in the factory, and a reserved steel bar is provided when the frame beam 2 is constructed at the opening position, and the hanging column 7 is welded thereon.

[0046] The upper steel beam 12 is processed and manufactured by I-beam in the factory, and a corbel 13 is pre-installed at one end thereof; the hand chain hoist 10 is arranged on the lifting ear 5, and is fixed to the upper steel beam 12 by steel wire ropes 11 of different lengths, so that the upper steel beam 12 is first slowly lifted at a certain inclination angle. After being lifted to a certain height without colliding with the main structure, the steel wire rope 11 is adjusted to the same length so that it can be horizontally lifted to the installation position; one end of the upper steel beam 12 is connected and fixed to the hanging column 7, and the other end is fixed to the embedded part 8 through the corbel 13.

[0047] The hoisting and installation method of the lower steel beam 14 is similar to that of the upper steel beam 12; the lower steel beam 14 is pre-installed with a corbel 13 at one end thereof, and a column 15 is arranged thereon, and the column 15 is connected and fixed to the upper steel beam 12;

[0048] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0049] Embodiment 3

[0050] As another embodiment, this embodiment 3 proposes, based on the embodiments 1 and 2, a more specific construction space-limited double-layer H-shaped steel conversion layer, such as Figures 8 to 10 As shown:

[0051] The auxiliary mounting bracket 16 is composed of a base 17, an ear plate 18, a fixed shaft 19, a support rod 20, a pulley 21, a jack 22, a square steel 23, a perforated steel plate 24, a support bottom plate 25, a support column 26, a cushion block 27, an operating platform 28, a clamping plate 29, a support rod 30, a fixed sleeve 31, a reinforcement sleeve 32, and a guardrail 33. The base 17 is made of square steel 23, on which the ear plate 18 and the fixed shaft 19 are arranged; the pulley 21 The auxiliary mounting bracket 16 is connected to the adjustable threaded support rod 20, and the support rod 20 is fixed to the fixed shaft 19 by bolts; the operating platform 28 is set on the top of the auxiliary mounting bracket 16 and is made of steel plate, and is provided with a reserved hole 34, a fixed sleeve 31, and a reinforcing sleeve 32, wherein the reinforcing sleeve 32 is located at the position of the reserved hole 34; a support rod 30 is welded at one end of the support column 26; a clamping plate 29 is set on the support rod 30; the support column 26 passes through the reinforcing sleeve 32 and then falls into place On the supporting bottom plate 25; a jack 22 is arranged at the lower part of the support rod 30, wherein the jack 22 is located in a fixed sleeve 31 to prevent it from shifting; guardrails 33 are arranged around the operating platform 28; the perforated steel plate 24 is located at the upper part of the auxiliary mounting bracket 16, one end of the cable wind rope is connected to the perforated steel plate 24, and the other end is connected to the floor anchor to ensure the stability of the entire bracket; the auxiliary mounting bracket 16 moves to the designed position, is first initially fixed by the cable wind rope, and then the ear plate 18 is synchronously lifted by the jack 22, so that the pulley 21 is in a stress-free state, the support rod 20 is adjusted to move it upward, and it is lowered by the jack 22, so that the base 17 supports the ground; after the upper steel beam 12 and the lower steel beam 14 are hoisted to the designed position, the upper steel beam 12 and the lower steel beam 14 are located in the card plate 29, and the cushion block 27 is placed by adjusting the support rod 30 by the jack for temporary shelving and stabilization, and the construction personnel are located in the operating platform 28 to facilitate its installation.

[0052] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0053] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A construction method for a double-layer H-shaped steel transfer layer with limited construction space, characterized in that: The following steps are involved: Step 1: Hoist and install on the frame beam at the opening and weld the connecting sling; Step 2: Installation of transfer beam: horizontally erect the transfer beam on the frame beam; Step 3: Lift and install the upper steel beam: The transfer beam is hoisted to the upper steel beam by a hand chain hoist and a steel wire rope, and the two ends of the upper steel beam are fixedly connected to the suspending column and the frame beam respectively; Step 4: Lift and install the lower steel beam: Use the same method to hoist the lower steel beam; Step 5: Auxiliary installation of steel beams: Move the auxiliary installation bracket to the designed position and initially fix it with a guy rope; place the upper and lower steel beams in the pallet, adjust the height of the support rod with a jack, and temporarily place them for stability.

2. The construction method of double-layer H-shaped steel conversion layer with limited construction space according to claim 1 is characterized in that: The top surface of the frame beam is provided with embedded parts; in step 2, a lifting lug is provided on the conversion beam, and a short column is provided at the end of the conversion beam crossing the opening; the lower parts of the two ends of the conversion beam are connected and fixed to the embedded parts, and the conversion beam is installed horizontally.

3. The construction method of a double-layer H-shaped steel transfer layer with limited construction space according to claim 1 is characterized in that: Embedded parts are provided on the side of the frame beam at a height corresponding to the upper steel beam. In step three, a corbel is pre-installed at one end of the upper steel beam; the hand winch is arranged on the lifting ear and is fixed to the upper steel beam by steel wire ropes of different lengths, so that the upper steel beam is first lifted at a certain inclination angle. After being lifted to a certain height without colliding with the main structure, the steel wire ropes are adjusted to the same length to make it rise horizontally to the installation position; one end of the upper steel beam is connected and fixed to the hanging column, and the other end is fixed to the embedded part by the corbel.

4. The construction method of a double-layer H-shaped steel transfer layer with limited construction space according to claim 3 is characterized in that: In step 4, a corbel is pre-installed at one end of the lower steel beam, a column is arranged on the lower steel beam, and the column is connected and fixed to the upper steel beam.

5. The construction method of a double-layer H-shaped steel transfer layer with limited construction space according to claim 1 is characterized in that: The auxiliary mounting bracket comprises a base, a jack, a steel plate with holes, a supporting base plate, a supporting column, a cushion block and an operating platform; a pulley is installed on the base; an operating platform is arranged on the top of the auxiliary mounting bracket, a supporting column runs through the center of the operating platform, and a supporting rod is welded on the top of the supporting column; a clamping plate is arranged on the supporting rod; the bottom of the supporting column is supported on the supporting base plate; the jack is arranged between the operating platform and the lower part of the supporting rod, and guardrails are arranged around the operating platform; the steel plate with holes is located on the upper part of the auxiliary mounting bracket, and the cable steel plate with holes and the floor anchor are connected by a cable rope.

6. The construction method of a double-layer H-shaped steel transfer layer with limited construction space according to claim 5 is characterized in that: Ear plates and fixed shafts are arranged around the base, and a jack is supported under the lifting ear plates; the pulley is connected to the support rod, and the support rod is connected to the fixed shaft by bolts; a fixed sleeve, a reinforcement sleeve and a reserved hole are arranged on the operating platform, and the reinforcement sleeve is located above the reserved hole, wherein the jack is located in the fixed sleeve.

7. The construction method of a double-layer H-shaped steel transfer layer with limited construction space according to claim 6 is characterized in that: In step five, the auxiliary installation bracket is moved to the designed position, first preliminarily fixed by a guy rope, and then the ear plate is synchronously lifted by a jack to put the pulley in a stress-free state, the support rod is adjusted to move it upward, and it is lowered by the jack to make the base support the ground; after the upper steel beam and the lower steel beam are hoisted to the designed position, the upper steel beam and the lower steel beam are located in the clamping plate, and the pads are placed by adjusting the support rod with a jack to temporarily shelve them firmly, and the construction personnel are located in the operating platform to facilitate their installation.

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