CN106522282A - Liftable post-cast strip template structure and system and construction method thereof - Google Patents

Abstract

A liftable post-casting belt formwork structure and system and its construction method, wherein the liftable post-casting belt formwork structure includes a formwork horizontally arranged at the post-casting belt; it also includes a formwork bracket and a frame connected between the formwork and the formwork support lead screw; the formwork support is located below the formwork and arranged in parallel and at intervals along the long axis of the post-casting tape; the formwork support is adjustable connected to the formwork through a lead screw. The invention solves the technical problems of inconvenient and incomplete removal of construction waste at the existing post-casting belt and the adverse effect of scaffolding on subsequent construction operations during the construction of the post-casting belt.

Description

A liftable post-casting tape formwork structure and system and its construction method

technical field

The invention relates to the technical field of building engineering construction, in particular to a liftable post-casting belt formwork structure and system and a construction method thereof.

Background technique

The post-pouring strip is a concrete with a certain width reserved in beams, slabs (including foundation slabs), walls and other structures and poured after a certain period of time in order to adapt to environmental temperature changes, concrete shrinkage, uneven settlement of structures and other factors. Belt, high-rise buildings, public buildings and cast-in-place integral reinforced concrete structures of super-long structures are usually equipped with post-cast belts, so that large-volume concrete can be constructed in blocks, speeding up the construction progress and shortening the construction period.

At present, the post-cast belt construction method is that the post-cast belt beam slab is constructed together with the main structural beam-slab. When the cast-in-place structural beam-slab concrete meets the specification requirements, the formwork and support system of the beam-slab are removed, and the post-cast belt beam-slab part is retained. When the formwork and support system meet the design requirements, the concrete shall be poured after pouring. During the construction process and chiseling operation, more debris, concrete fragments, dust and other sundries will be produced. These sundries need to be removed from the subsequent concrete pouring area in time. For special construction operations that do not remove the formwork , Slag removal and cleaning will become very inconvenient, time-consuming and laborious, often resulting in incomplete removal, resulting in poor engineering quality of post-pouring concrete pouring construction.

Another method is: first remove the steel pipe bent frame and formwork support at the post-casting zone, and then set up the steel pipe bent frame to push back and forth the beam and slab members on both sides of the post-casting zone. However, during this period of demolition and roofing, the beams and slabs on both sides of the large-span post-casting belt are in a cantilever state, and the reinforcement of the beams and slabs at the post-casting belt is generally not designed according to the cantilever structure, so it is extremely It is easy to cause cracks in the beams and slabs; at the same time, it is difficult to control the topping force in the topping treatment, which eventually leads to more quality problems in the beams and slabs on both sides of the post-casting belt.

The pouring time of different types of post-casting concrete is different. The telescopic post-casting should be determined according to the shrinkage of the previously poured part of the concrete, generally 60 days after construction; the post-settlement post-casting should be carried out after the settlement of the building is basically completed. . The retention time of the post-pouring tape support system is very long, which affects the subsequent construction.

Contents of the invention

The present invention proposes a formwork structure and system of a liftable post-casting belt and its construction method, to solve the inconvenient and incomplete removal of construction waste at the existing post-casting belt and the adverse effects of scaffolding on subsequent construction operations during the construction of the post-casting belt technical issues.

The technical scheme of the present invention is as follows.

A liftable post-casting strip formwork structure, including a formwork horizontally arranged at the post-casting belt; also includes a formwork support and a lead screw connected between the formwork and the formwork support; the formwork support is located below the formwork, along the rear The long axis direction of the cast strips is arranged in parallel and at intervals; the formwork support is adjustablely connected to the formwork through a lead screw.

Preferably, the main body of the formwork support is U-shaped, and its two ends extend horizontally outward to form horizontal wing bars; vertical threaded holes are spaced apart on the cross bar of the main body.

Preferably, the formwork includes a template panel, a group of longitudinal secondary back flutes arranged at parallel intervals along the bottom surface of the template panel, and a group of horizontal main back flutes connected to the bottom surface of a group of secondary back flutes along the longitudinal direction and at parallel intervals; A vertical through hole 1 is provided on the back corrugated at the position corresponding to the vertical threaded hole; the template panel is horizontally arranged between the two vertical bars of the main body, and a There are two vertical through holes.

Preferably, both ends of the main back flute are provided with vertically moving U-shaped guide plates; the opposite sides parallel to each other of the guide plates are clamped on both sides of the vertical bar of the main body.

Preferably, the lead screw is inserted into the vertical threaded hole and the first vertical through hole, and the bearing outer ring at the upper end of the lead screw is fixed in the first vertical through hole.

A liftable post-casting belt formwork structure system, including pre-cast floor slabs on both sides of the post-casting belt, a post-casting belt formwork structure installed under the post-casting belt, and a formwork structure supported under the post-casting belt formwork structure support; the post-casting belt formwork structure is the above-mentioned post-casting belt formwork structure; the opening of the main body of the formwork support is facing the post-casting belt to be poured, and two horizontal wings are respectively arranged under the first-casting floor slabs on both sides; The formwork is supported in a groove surrounded by two vertical bars and horizontal bars of the main body just below the pouring belt to be poured.

Preferably, the formwork structure support includes uprights, oblique rods and tie rods; there are two sets of uprights, which are supported respectively along the length direction of the back-casting belt under the first-cast floor slabs on both sides of the back-casting belt to be poured; The tie rods are tied horizontally between two sets of uprights; one end of the diagonal rod is supported at the intersection of the tie rods and the uprights, and the other end is supported at the bottom corner of the main body of the formwork support.

A construction method for a liftable post-casting tape formwork structure system comprises the following steps.

Step 1: Preparation for installation of the post-cast tape formwork structure system.

Step 2: Assemble the column and make the formwork bracket and formwork that can be raised and lowered with the formwork structure after pouring, and put the screw through the vertical through hole 1, and the bearing outer ring at the upper end of the lead screw is fixed to the vertical through hole 1.

Step 3: Install the template support to the top of the column.

Step 4: Adjust the height of the column and fix the two horizontal wing bars.

Step 5: Install the slanting rod and tie rod.

Step 6: Adjustably connect the formwork and lead screw to the formwork support and the bottom of the pouring belt after pouring.

Step 7: Use the rocker to rotate the lead screw to adjust the height of the formwork, and the formwork panel is lifted to the bottom level of the pouring belt to be poured and stopped.

Step 8: Check the structural system of the liftable post-casting tape formwork.

Step 9: Make post-pouring concrete and pour post-pouring.

Step 10: Post-pouring with concrete curing.

Step 11: Remove the liftable post-casting tape formwork structure system.

Preferably, the distance between two adjacent pillars in each group of pillars is 1000mm-1500mm; the secondary back flute is installed on the bottom surface of the formwork panel at a distance of 100mm-200mm.

Preferably, the step in step four is specifically to adjust the height of the column, and clamp the horizontal wing bar between them to fix the horizontal wing bar of the formwork support through the extrusion between the top of the column column and the floor slab poured first; in step five, install The slanting rod and the tie rod are specifically as follows: firstly, one end of the slanting rod is fixed at the bottom corner of the main body of the formwork support, and the other end is fixed on the column body; then the tie rod is installed, and the two ends of the tie rod are fixed on the column The ends of the slanting rods are connected and fixed; Step 6 is specifically, screw the lower end of the lead screw into the vertical threaded hole, and clamp the opposite sides parallel to each other of the guide plate on both sides of the vertical rod of the main body.

Compared with the prior art, the present invention has the following characteristics and beneficial effects.

1. The present invention provides a liftable post-casting tape formwork structure and system and its construction method. Without removing the support system of the post-casting tape, the post-casting tape formwork structure system can be lifted and lowered by adjusting the lead screw to solve the problem of post-casting The problem of inconvenient and incomplete removal of construction waste in belt parts; and solve the adverse effects of scaffolding on subsequent construction operations during post-pouring belt construction.

2. In the post-cast belt formwork structure invented, the overall formwork system can be raised and lowered by workers using the rocker to rotate the screw on the upper part of the structure. Before pouring the concrete in the post-cast belt part, the bottom mold is adjusted and lowered to completely remove the post-cast belt. There are more debris, concrete fragments, dust and other sundries generated during the internal construction process and chiseling operation.

3. The column support device takes up less space and is independent of other scaffolding systems at the first pouring site. When removing the scaffolding system at the first pouring site, it is not necessary to remove the column support device at the post-casting zone. During the entire process, the first pouring site is not in a cantilever position. Time, so as to avoid quality problems such as cracks in the first poured part under the action of construction load and self-weight.

4. The column support device is adopted to provide sufficient construction work space for subsequent construction operations at this part, and to solve the adverse effects of traditional scaffolding on the inconvenience of subsequent construction.

5. The liftable formwork device adopted in the present invention can conveniently realize the accumulation of construction waste on the post-pouring belt, and thoroughly remove it before pouring the post-pouring concrete; It occupies a small area and provides sufficient work space for subsequent construction operations.

Description of drawings

Fig. 1 is a schematic diagram of the working state of the liftable post-cast tape formwork structure in the present invention.

Fig. 2 is a structural schematic diagram of the liftable post-casting tape formwork in the present invention.

Fig. 3 is an enlarged schematic diagram of the lead screw in structure I in Fig. 1 .

Fig. 4 is a schematic diagram of the structural system of the liftable post-cast tape formwork in the present invention.

Reference signs: 1—main body, 2—horizontal wing bar, 3—column, 4—first poured floor, 5—slanting rod, 6—screw; 61—bearing outer ring, 62—bearing inner ring, 7—embedded groove Two-way sleeve, 8—main back flute, 9—guide plate, 10—rocker, 11—vertical threaded hole, 12—vertical through hole 1, 13—vertical through hole 2, 14—secondary back flute, 15 —Form panel, 16—Tie rod.

detailed description

The purpose of the present invention is to overcome the deficiencies of the existing technology, to provide a formwork structure and system of the post-casting belt that can be lifted and lowered, and its construction method. Without removing the support system of the post-casting belt, it can be raised and lowered by adjusting the lead screw 6 The formwork structure of the pouring belt solves the inconvenient and incomplete removal of construction waste at the post-casting belt; and solves the adverse effects of scaffolding on subsequent construction operations during the construction of the post-casting belt.

As shown in Figure 1 and Figure 2, this liftable post-casting strip formwork structure includes a formwork horizontally arranged at the post-casting belt; it also includes a formwork support and a lead screw 6 connected between the formwork and the formwork support; The formwork support is located below the formwork and is arranged at intervals in parallel along the long axis of the post-casting tape; the formwork support is adjustable connected to the formwork through a lead screw 6; the lead screw 6 drives the formwork to move in the vertical direction.

In this embodiment, the main body 1 of the template support is U-shaped, and its two ends extend horizontally outward to form a horizontal wing bar 2; two vertical threaded holes 11 are spaced apart on the cross bar at the bottom of the main body 1, so that The vertical threaded hole 11 is for the lead screw 6 to pass through along its central axis, and the vertical load is transmitted by cutting the thread on the lead screw 6 body and the thread in the vertical threaded hole 11; the main body 1 is made of square steel pipe When installed, the opening of the main body 1 faces up to the uncast part of the post-casting belt, and the horizontal wing bars 2 at both ends are close to the first-casting floor slab 4.

In this embodiment, the template includes a template panel 15, a set of longitudinal secondary back flutes 14 arranged at parallel intervals along the bottom surface of the template panel 15, and a group of transverse main lateral edges connected to the bottom surface of a group of secondary back flutes 14 along the longitudinal direction and at parallel intervals. Back flute 8; on the main back flute 8, a vertical through hole 12 is provided at the position corresponding to the vertical threaded hole 11; the template panel 15 is horizontally arranged between two vertical bars of the main body 1, and the template panel 15 is provided with a vertical through hole 2 13 at a position corresponding to the vertical through hole 1 12 .

In this embodiment, the template panel 15 is made of double-layer plywood; the vertical through hole 13 on the template panel 15 has the same outer diameter as the bearing inner ring 62, and its center of circle is on the axis of the lead screw 6; Both ends of the upper plywood of the template panel 15 along the width direction are 10mm shorter than the lower plywood along the width direction.

The cross-sectional size of the secondary back corrugated 14 is 80 mm×50 mm, and the distance between two adjacent secondary back corrugated 14 is between 100 mm and 200 mm.

In this embodiment, both ends of the main back flute 8 are provided with vertically movable U-shaped guide plates 9 ;

In this embodiment, the lead screw 6 is inserted into the vertical threaded hole 11 and the vertical through hole 12, and the bearing outer ring 61 at the upper end of the lead screw 6 is fixed in the vertical through hole 12; A bearing inner ring 62 is arranged in the ring 61, and the bearing inner ring 62 is connected with the top of the screw 6 as a whole, and the bearing outer ring 61 is embedded in the vertical through hole 12 and connected with the main back corrugated 8 as a whole.

The top of the screw 6 is not threaded at the part that is in contact with the inner ring 62 of the bearing; the top of the screw 6 is welded with a two-way sleeve 7 with the same diameter as the inner ring 62 of the bearing. And partly form a whole with the bearing inner ring 62 and the top end of the leading screw 6 . The central axis of the two-way socket 7 coincides with the central axis of the lead screw 6 and the bearing inner ring 62, and it can be used in conjunction with the rocker 10 to make the lead screw 6 rotate clockwise or counterclockwise to realize the up and down movement of the main back groove 8 .

As shown in Figure 4, a liftable post-casting strip formwork structure system includes the first-cast floor slabs 4 on both sides of the post-casting strip to be poured, the post-casting strip formwork structure installed under the post-casting strip and the support on the post-casting Formwork structure support below the belt formwork structure; the post-casting tape formwork structure is the above-mentioned post-casting tape formwork structure; the opening of the main body 1 of the formwork support is facing the post-casting tape to be poured, and two horizontal wing bars 2 are respectively arranged on Below the floor slabs 4 that are poured first on both sides; the formwork is supported in a groove surrounded by two vertical bars and cross bars of the main body 1 just below the post-casting belt to be poured.

In this embodiment, the formwork transmits the load to the formwork structure support through the main body 1 .

In this embodiment, the formwork structure support includes uprights 3, oblique rods 5 and tie rods 16; the uprights 3 have two groups, which are respectively supported on the first and second sides of the back-casting belt along the length direction of the back-casting belt. Below the floor slab 4; the tie rod 16 is horizontally tied between the two sets of columns 3; one end of the diagonal rod 5 is supported at the intersection of the tie rod 16 and the column 3, and the other end is supported at the bottom corner of the main body 1 of the formwork support place. The column 3 is made of cold-formed thin-walled steel through bolt connection, and is supported under the horizontal wing bar 2 of the main body 1; the oblique bar 5 is a round steel pipe, one end is fixed at the bottom corner of the main body 1, and the other end It is fixed on the column 3; the two ends of the tie rod 16 are respectively connected with the ends of the oblique rods 5 fixed on the column 3 on the left and right to form a lateral constraint, thereby forming a stable lower bracket.

The construction method of the liftable post-casting tape formwork structure system includes the following steps.

Step 1: Preparation for the installation of the post-cast belt formwork structure system; the preparation for the installation of the post-cast belt formwork structure system is mainly prepared from three aspects: personnel, materials and machinery.

Step 2: Assemble the column 3 and make the formwork bracket and formwork that can be lifted and lowered to formwork with formwork structure, and put the screw 6 through the vertical through hole 12, the bearing outer ring 61 on the upper end of the lead screw 6 and the vertical through hole One 12 is fixed.

Step 3: Install the template support to the top of the column 3;

Step 4: Adjust the height of the upright column 3, and fix the horizontal wing bar 2 sandwiched between them through the extruding action of the top of the upright column 3 and the first poured floor 4.

Step 5: Install the diagonal rod 5 and the tie rod 16; install the lead screw 6 in the main back corrugated 8, and then install the combination into the main body 1: connect the main back corrugated 8 through the threaded connection of the lead screw 6 and the main body 1 The integral component with the lead screw 6 is installed in the main body 1 .

Step 6: Adjustably connect the formwork and lead screw 6 to the formwork support and the bottom of the pouring belt after pouring.

Step 7: Use the rocker 10 to rotate the lead screw 6 to adjust the height of the formwork, and the formwork panel 15 is lifted to the bottom elevation of the cast belt to be poured and stopped.

Step 8: Check the structural system of the liftable post-casting tape formwork.

Step 9: Make post-pouring concrete and pour post-pouring.

Step 10: Post-pouring with concrete curing.

Step 11: Remove the liftable post-casting tape formwork structure system.

In this embodiment, in step 2, the cold-formed thin-walled steel members are connected by bolts to make uprights 3 or the uprights 3 are formed components, and the distance between two adjacent uprights 3 in each set of uprights is 1000mm- 1500mm, the column 3 is arranged under the first pouring floor 4 on both sides of the post-casting belt along the length direction of the post-casting belt; the single-layer plywood is made into a double-layer formwork according to the size requirements of the formwork panel 15; the secondary back corrugated 14 in the formwork device They are installed on the bottom surface of the template panel 15 at a pitch of 100 mm to 200 mm.

In this embodiment, the step in step 4 is specifically to adjust the height of the column 3, and through the extrusion between the column top of the column 3 and the floor slab 4 to be poured first, the horizontal wing bar 2 is sandwiched between them to fix the horizontal wing of the formwork support Rod 2; in step 5, install the slanting rod 5 and the tie rod 16. Specifically, first fix one end of the slanting rod 5 at the bottom corner of the main body 1 of the formwork support, and fix the other end on the column body of the column 3; then install the tie rod 16. The two ends of the tie rod 16 are respectively connected and fixed to the ends of the oblique rod 5 fixed on the column 3; Step 6 is specifically to screw the lower end of the lead screw 6 into the vertical threaded hole 11, and guide the The parallel opposite sides of the board 9 are sandwiched between the two sides of the vertical bar of the main body 1 .

The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention covers those skilled in the art. Equivalent technical means conceivable by the concept of the present invention.

Claims (10)

1. A liftable post-casting belt formwork structure, including a formwork horizontally arranged at the post-casting belt; it is characterized in that it also includes a formwork support and a lead screw (6) connected between the formwork and the formwork support; The formwork support is located below the formwork and arranged in parallel and at intervals along the long axis of the post-casting tape; The template support is adjustable connected with the template through a lead screw (6). 2. A liftable post-cast tape formwork structure according to claim 1, characterized in that: the main body (1) of the formwork support is U-shaped, and its two ends extend horizontally outward to form horizontal wing bars (2) ; Vertical threaded holes (11) are spaced apart on the cross bar of the main body (1). 3. A liftable post-casting tape formwork structure according to claim 2, characterized in that the formwork includes a formwork panel (15), a group of longitudinal secondary backs arranged at parallel intervals along the bottom surface of the formwork panel (15) flutes (14) and a group of horizontal main back flutes (8) connected to the bottom surface of a group of secondary back flutes (14) along the longitudinal and parallel intervals; A vertical through hole (12) is provided on the main back flute (8) corresponding to the vertical threaded hole (11); The template panel (15) is horizontally arranged between the two vertical bars of the main body (1), and the template panel (15) is provided with a vertical through hole two (13) at a position corresponding to the vertical through hole one (12). ). 4. A liftable post-cast tape formwork structure according to claim 3, characterized in that: both ends of the main back flute (8) are provided with U-shaped guide plates (9) that move vertically; The opposite sides parallel to each other of the guide plate (9) are clamped on both sides of the vertical bar of the main body (1). 5. A liftable post-cast tape formwork structure according to claim 3 or 4, characterized in that: the screw (6) is inserted through the vertical threaded hole (11) and the vertical through hole one (12) , and the bearing outer ring (61) at the upper end of the lead screw (6) is fixed in the vertical through hole one (12). 6. A liftable post-pouring belt formwork structure system, including the pre-cast floor slabs (4) on both sides of the post-pouring belt, the post-casting belt formwork structure installed under the post-pouring belt, and the post-casting belt formwork supported The formwork structure support under the structure; it is characterized in that: the post-cast tape formwork structure is the post-cast tape formwork structure described in claim 5; the opening of the main body (1) of the formwork support is facing the post-cast tape, Two horizontal wing bars (2) are respectively arranged under the first-cast floor slabs (4) on both sides; in the slot. 7. A liftable post-casting tape formwork structure system according to claim 6, characterized in that: the formwork structure support includes uprights (3), diagonal bars (5) and tie rods (16); There are two sets of upright columns (3), which are supported respectively along the length direction of the post-poured belt under the first-cast floor slabs (4) on both sides of the to-be-poured belt; ); one end of the diagonal rod (5) is supported at the intersection of the tie rod (16) and the column (3), and the other end is supported at the bottom corner of the main body (1) of the formwork support. 8. A construction method of the liftable post-casting tape formwork structure system according to any one of claim 6 or 7, characterized in that, comprising the following steps, Step 1: Preparation for installation of the post-cast tape formwork structure system; Step 2: Assemble the column (3) and make the formwork bracket and formwork that can be lifted and lowered to formwork with formwork structure, and put the screw (6) through the vertical through hole one (12), and the bearing on the upper end of the lead screw (6) Outer ring (61) is fixed with vertical through hole one (12); Step 3: Install the template support to the top of the column (3); Step 4: Adjust the height of the column (3) and fix the two horizontal wing bars (2); Step 5: Install the slanting rod (5) and tie rod (16); Step 6: Adjustably connect the formwork and lead screw (6) to the formwork support and the bottom of the pouring belt after pouring; Step 7: Use the rocker (10) to rotate the lead screw (6) to adjust the height of the formwork, and the formwork panel (15) is lifted to the bottom elevation of the pouring belt to be poured and stopped; Step 8: Check the structural system of the liftable post-cast belt formwork; Step 9: Make post-pouring concrete and pour post-pouring; Step 10: post-pouring with concrete curing; Step 11: Remove the liftable post-casting tape formwork structure system. 9. The construction method of a liftable post-casting belt formwork structure system according to claim 8, characterized in that: the distance between two adjacent columns (3) in each group of columns is 1000 mm to 1500 mm; The secondary back flute (14) is installed on the bottom surface of the template panel (15) with a spacing of 100mm to 200mm. 10. The construction method of a liftable post-casting tape formwork structure system according to claim 8, characterized in that: The step in step 4 is to adjust the height of the upright column (3), and through the extrusion between the top of the upright column (3) and the floor slab (4) to be poured first, sandwich the horizontal wing bar (2) between them to fix the formwork support horizontal wing bars (2); In the fifth step, install the diagonal rod (5) and the tie rod (16). Specifically, first fix one end of the diagonal rod (5) to the bottom corner of the main body (1) of the formwork support, and fix the other end to the column of the upright column (3). body; then install the tie rod (16), the two ends of the tie rod (16) are respectively connected and fixed with the ends of the oblique rod (5) fixed on the column (3); Step 6 is specifically to screw the lower end of the lead screw (6) into the vertical threaded hole (11), and clamp the opposite sides of the guide plate (9) parallel to each other on both sides of the vertical bar of the main body (1).