High-formwork-erecting support-free construction method suitable for high and large formwork engineering
By adopting the high-support-free construction method in tall formwork projects, the support structure and operating platform on the prefabricated inverted T-beams are used to directly connect the main reinforcement of cast-in-place beams, the problems of large material consumption, long construction period and high altitude operation risks in traditional high-support-form construction are solved, and a more efficient and safe construction process is achieved.
Patent Information
- Application Number
- CN202510393135.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-06-06
AI Technical Summary
Traditional high-support formwork construction has problems such as high material consumption, long construction cycle and high altitude operation risks, and is costly and insufficient safety in the construction of scattered ultra-gravity, over-limit beams and cantilever plates.
The high-support-free construction method is adopted. By installing support angle steel and square steel pipes on the prefabricated inverted T-beam, the operating platform and beam side formwork are set up, and the main ribs of cast-in-place beams are directly connected to the cast-in-place beams by using a pre-embedded connector to avoid the erection of the bottom support frame.
It has achieved the reduction of material consumption and construction cycle in high-end formwork projects, reduced risks of high-altitude operations, and improved construction safety and efficiency.
Smart Images
Figure CN120100182A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of high formwork construction, in particular to a high formwork support-free construction method suitable for high-large formwork engineering. Background Art
[0002] Traditional high-support formwork construction requires the erection of a large number of steel pipe supports, which has the problems of high material consumption, long construction period, and high risk of high-altitude operations. In the existing technology, although the buckle frame support system can partially improve efficiency, it still has the defects of high cost and insufficient safety in the construction of dispersed super-high beams, over-limit beams and cantilever plates. If the traditional formwork system is used for construction, the erection area is large, the erection height is high, the construction requirements are high, and the construction cost is high. In specific construction projects, the super-high beams and platform over-limit beams in the warehouse are distributed in many and scattered locations, which is not conducive to the use of traditional formwork system to erect the frame. Summary of the invention
[0003] In view of the above-mentioned prior art, the present invention proposes a high-formwork support-free construction method suitable for tall formwork projects.
[0004] The present invention provides a high-formwork support-free construction method suitable for high-rise formwork engineering, comprising the following steps: Step 1: Installation of beam bottom formwork: Install support angle steels on the prefabricated inverted T beams on both sides of the beam to be cast through expansion bolts, set up support square steel pipes on the upper sides of the support angle steels on both sides, and the support square steel pipes are fully distributed along the beam span direction to form the bottom of the beam to be cast, and install the beam bottom formwork on the upper side of the support square steel pipes; pre-buried connectors are installed on the prefabricated inverted T beams on both sides above the support square steel pipes, and steel bars are tied through the pre-buried connectors; Step 2: Installation of foam strips on the beam side: Paste the foam strips on the beam side on the prefabricated inverted T beams on both sides according to the beam side frame line; Step 3: Setting up the operating platform: Setting up the operating platform at both ends of the beam to be cast, i.e. vertically in the span direction of the beam; Step 4: Beam side formwork installation: Use the operating platform to install the beam side formwork on both sides of the beam to be cast, i.e., along the beam span direction; Step 5: Concrete pouring: Concrete pouring can only be carried out after the beam side formwork reinforcement is completed.
[0005] Preferably, in step 1, after the beam bottom formwork is installed, a safety net is set below the beam bottom formwork, and the safety net is installed and fixed to the four corners of the beam to be cast.
[0006] Preferably, in step 2, the beam side foam strip extends into the beam side formwork by no more than 10 mm.
[0007] Preferably, in step 3, the operating platform includes several transverse steel pipes arranged along the span direction of the beam, the two ends of the transverse steel pipes are respectively placed on the flanges of the prefabricated inverted T-beams on both sides, the ends of the transverse steel pipes on the same side are tied together by longitudinal steel pipes through fasteners, and the several transverse steel pipes are fully covered with steel mesh, which is fixed with iron wire.
[0008] Preferably, in step 4, when installing the beam side formwork, the beam side foam strip is used to cling to the side of the prefabricated inverted T beam to ensure that there is no leakage of slurry. First, the beam side formwork on one side is placed against the beam side foam strip on the same side. After the mold is closed, there will be a small gap between the beam side formwork on the other side and the prefabricated inverted T beam. In the direction perpendicular to the beam side formwork, a formwork is fixed with cement nails to close the small gap between the beam side formwork and the prefabricated inverted T beam. Preferably, in step 4, the beam side formwork adopts a thick formwork, the back ribs are reinforced with wooden planks, and after the bonding is completed, they are fixed with tension screws, which are arranged in double rows and double columns.
[0009] Preferably, in step 5, real-time monitoring is carried out before and after the concrete solidifies and before the concrete final setting to the age of 7 days. The monitoring frequency after final setting is once a day. When the monitoring data exceeds the warning value, the pouring of concrete is immediately stopped, the personnel are evacuated, and reinforcement treatment is carried out in time.
[0010] Preferably, the real-time monitoring includes a number of displacement observation points and a number of settlement observation points, the displacement observation points are arranged on the side of the beam bottom formwork, the settlement observation points are arranged on the top of both ends of the prefabricated inverted T-beam, and two observation points are arranged for each beam.
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a high-support formwork-free construction method suitable for tall formwork projects. During construction, the cast-in-place beam formwork support is placed on the prefabricated inverted T-beam, which can eliminate the need to set up a bottom support frame. Through node optimization, the pre-buried connector on the prefabricated inverted T-beam is used to directly connect the main reinforcement of the cast-in-place beam, eliminating the need for bottom support. The flange of the prefabricated inverted T-beam is used as the placement point of the support-free beam at the platform. An operating platform is set up on both sides of the beam. The flange of the prefabricated inverted T-beam is used as a support point, and a support-free formwork system is formed in cooperation with steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a construction schematic diagram of a high-formwork support-free construction method suitable for tall formwork projects in an embodiment of the present invention.
[0013] Figure 2 It is a schematic diagram of the construction of the beam side formwork in an embodiment of the present invention.
[0014] In the figure, 1. Prefabricated inverted T-beam; 2. Support angle steel; 3. Expansion bolts; 4. Support square steel pipe; 5. Embedded connector; 6. Beam side formwork; 7. Tie screws. DETAILED DESCRIPTION
[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.
[0016] Example: Figure 1-Figure 2 A high formwork support-free construction method suitable for high formwork engineering is shown, comprising the following steps: Step 1: Installation of beam bottom formwork: Before installing the beam bottom formwork, compact the ground at the crankshaft station site and lay steel plates to ensure that the foundation is free of water, compacted, and has sufficient bearing capacity; lay out the lines on the prefabricated inverted T-beams 1 on both sides of the beam to be cast, determine the fixed position of the support angle steel 2, use an impact drill to drill holes on the prefabricated inverted T-beams 1 on both sides, and then install the support angle steel 2 through expansion bolts 3, and set up supporting square steel pipes 4 on the upper sides of the supporting angle steels 2 on both sides. The supporting square steel pipes 4 are fully distributed along the span direction of the beam to form the bottom of the beam to be cast, and the beam bottom formwork is installed on the upper side of the supporting square steel pipes 4. The beam bottom formwork adopts a wooden formwork; after the installation of the beam bottom formwork, a safety flat net is set below the beam bottom formwork, and the safety flat net is installed and fixed to the four corners of the beam to be cast to prevent falling from a height during carpentry and reinforcement work; embedded connectors 5 are installed on the prefabricated inverted T-beams 1 on both sides above the supporting square steel pipes 4, and the reinforcement is tied through the embedded connectors 5.
[0017] Among them, when installing the expansion bolt 3, the nut and the screw are welded to prevent the nut and the screw from loosening. After the construction of the beam to be cast is completed, the expansion bolt hole is cut off with a tool, anti-rust paint is applied, and cement consistent with the beam to be cast is used to smooth it.
[0018] Step 2: Installation of the beam side foam strips: Pre-paste the beam side foam strips on the prefabricated inverted T-beams 1 on both sides according to the beam side frame lines, and the beam side foam strips extend into the beam side formwork 6 by no more than 10 mm.
[0019] Step 3: Setting up the operating platform: A crankshaft is used to set up the operating platform at both ends of the beam to be cast, i.e., in the direction perpendicular to the beam span. The operating platform includes several transverse steel pipes arranged along the beam span, and both ends of the transverse steel pipes are respectively placed on the flanges of the prefabricated inverted T-beams 1 on both sides. The ends of the transverse steel pipes on the same side are tied together by longitudinal steel pipes through fasteners. The several transverse steel pipes are covered with steel mesh, which is fixed with iron wire.
[0020] Step 4: Installation of beam side formwork: Use the operating platform to install the beam side formwork 6 on both sides of the beam to be cast, that is, along the span direction of the beam; when installing the beam side formwork 6, use the beam side foam strip to stick to the side of the prefabricated inverted T-beam 1 to ensure no leakage. First, let the beam side formwork 6 on one side rest on the beam side foam strip on the same side. After the mold is closed, there will be a small gap between the beam side formwork 6 on the other side and the prefabricated inverted T-beam 1. In the direction perpendicular to the beam side formwork 6, use cement nails to fix a formwork to close the small gap between the beam side formwork 6 and the prefabricated inverted T-beam 1; the beam side formwork 6 uses a thick formwork, and the back ribs are reinforced with wooden squares. After the fitting is completed, it is fixed with tension screws 7, and the tension screws 7 are arranged in double rows and double columns.
[0021] Step 5: Concrete pouring: Concrete pouring can only be carried out after the reinforcement of the beam side formwork 6 is completed; real-time monitoring is carried out before and after the concrete is solidified and before the final setting of the concrete to the age of 7 days. The monitoring frequency after final setting is once a day. When the monitoring data exceeds the warning value, the concrete pouring is immediately stopped, the personnel are evacuated, and reinforcement is carried out in time; the real-time monitoring includes a number of displacement observation points and a number of settlement observation points. The displacement observation points are set on the side of the beam bottom formwork, and the settlement observation points are set at the top of both ends of the prefabricated inverted T-beam 1, and two observation points are set for each beam.
[0022] During the construction of this embodiment, a cast-in-place beam formwork support is placed on the prefabricated inverted T-beam 1, thereby eliminating the need to erect a bottom support frame.
[0023] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent schemes made using the contents of the present invention specification, directly or indirectly applied in other related technical fields, are also within the patent protection scope of the present invention.
Claims
1. A high formwork support-free construction method suitable for tall formwork projects, characterized in that: The steps include: Step 1: Installation of beam bottom formwork: Support angle steels (2) are installed on the prefabricated inverted T beams (1) on both sides of the beam to be cast by means of expansion bolts (3), and support square steel pipes (4) are set up on the upper sides of the support angle steels (2) on both sides. The support square steel pipes (4) are spread all over the beam span direction to form the bottom of the beam to be cast, and the beam bottom formwork is installed on the upper sides of the support square steel pipes (4); pre-buried connectors (5) are installed on the prefabricated inverted T beams (1) on both sides above the support square steel pipes (4), and steel bars are tied by means of the pre-buried connectors (5); Step 2: Install the foam strips on the beam side: Paste the foam strips on the beam side on the prefabricated inverted T beams (1) on both sides according to the beam side frame line; Step 3: Setting up the operating platform: Setting up the operating platform at both ends of the beam to be cast, i.e. vertically in the span direction of the beam; Step 4: installing the beam side formwork: using the operating platform to install the beam side formwork (6) on both sides of the beam to be cast, i.e., along the beam span direction; Step 5: Concrete pouring: Concrete pouring can only be carried out after the beam side formwork (6) is reinforced.
2. The high formwork-free support construction method suitable for large formwork engineering as claimed in claim 1, characterized in that: In step 1, after the beam bottom template is installed, a safety net is set below the beam bottom template, and the safety net is installed and fixed to the four corners of the beam to be cast.
3. The high formwork-free support construction method suitable for tall formwork engineering as claimed in claim 1 or 2, characterized in that: In step 2, the beam side foam strip extends into the beam side formwork (6) by no more than 10 mm.
4. The high formwork-free support construction method suitable for tall formwork engineering as claimed in claim 1 or 2, characterized in that: In step 3, the operating platform comprises a plurality of transverse steel pipes arranged along the beam span direction, the two ends of the transverse steel pipes are respectively placed on the flanges of the prefabricated inverted T-beams (1) on both sides, the ends of the transverse steel pipes on the same side are connected together by longitudinal steel pipes through fasteners, and the plurality of transverse steel pipes are fully covered with steel mesh, which is fixed by iron wire.
5. The high formwork-free support construction method suitable for tall formwork engineering as claimed in claim 1 or 2, characterized in that: In step 4, when installing the beam side template (6), the beam side foam strip is used to closely adhere to the side of the prefabricated inverted T beam (1) to ensure that there is no leakage of mortar. First, the beam side template (6) on one side is placed against the beam side foam strip on the same side. After the mold is closed, there will be a small gap between the beam side template (6) on the other side and the prefabricated inverted T beam (1). In the direction perpendicular to the beam side template (6), a template is fixed with cement nails to close the small gap between the beam side template (6) and the prefabricated inverted T beam (1).
6. The high formwork-free support construction method suitable for tall formwork engineering as claimed in claim 1 or 2, characterized in that: In step 4, the beam side formwork (6) is thick, the back rib is reinforced with wooden planks, and after the bonding is completed, it is fixed with tension screws (7), and the tension screws (7) are arranged in double rows and double columns.
7. The high formwork-free support construction method applicable to large formwork engineering as claimed in claim 1 or 2, characterized in that: In step 5, real-time monitoring is carried out before and after the concrete is solidified and before the final setting of the concrete until the concrete is 7 days old. The monitoring frequency after the final setting is once a day. When the monitoring data exceeds the warning value, the pouring of concrete is immediately stopped, the personnel are evacuated, and reinforcement treatment is carried out in time.
8. The high formwork-free support construction method applicable to large formwork engineering as claimed in claim 7, characterized in that: The real-time monitoring comprises a plurality of displacement observation points and a plurality of settlement observation points, wherein the displacement observation points are arranged on the side of the beam bottom formwork, and the settlement observation points are arranged on the top of both ends of the prefabricated inverted T beam (1), and two observation points are arranged on each beam.