CN212772377U - Recoverable foundation pit steel stand connecting device - Google Patents
Recoverable foundation pit steel stand connecting device Download PDFInfo
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- CN212772377U CN212772377U CN202020957706.8U CN202020957706U CN212772377U CN 212772377 U CN212772377 U CN 212772377U CN 202020957706 U CN202020957706 U CN 202020957706U CN 212772377 U CN212772377 U CN 212772377U
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Abstract
The utility model belongs to the technical field of civil engineering a recoverable foundation ditch steel stand connecting device. The steel upright post connecting device comprises a steel upright post, a floor slab connecting device and a bottom plate connecting device; the floor slab connecting device is connected with the steel upright post and the floor slab through bolts; the bottom plate connecting device is connected with the steel upright post and the cast-in-place pile through bolts. The device and the method are suitable for foundation pit engineering with the inner support, can realize complete recovery of the steel upright column, and avoid sectional cutting and waste material change. The steel stand of foundation ditch generally is lattice formula steel column, and the lower part is connected with the bored concrete pile, through setting up floor connecting device, bottom plate connecting device and the connecting piece of pile bolck and floor of general type, avoids steel stand and structural slab to water entirely, mainly adopts bolted connection mode combination steel stand device, and bored concrete pile and floor are detachable joint, and after the construction was accomplished, steel stand and connecting device all can be retrieved. The technology can save a large amount of steel, has strong universality, convenient construction and disassembly, and is energy-saving and environment-friendly.
Description
Technical Field
The technology belongs to the technical field of civil engineering, and particularly relates to a recoverable foundation pit steel stand column connecting device.
Background
In the foundation pit engineering construction process of setting up interior support, generally need adopt the steel stand, as the vertical atress component of interim interior support system, set up the stand stake under the stand, generally adopt the bored concrete pile. The steel column is processed into a lattice type steel column by adopting angle steel and batten plates. In the construction process, before the temporary support on the uppermost layer of the foundation pit is dismantled, the stand columns still need to be reserved during construction of the bottom plate and each floor slab of the structural basement, the conventional solution is that the steel stand columns are integrally cast in the bottom plate and each floor slab, a water stop steel plate needs to be arranged in the range of the bottom plate, when the support on the uppermost layer is dismantled, the steel stand columns are cut in layers, and the steel stand columns integrally cast in the bottom plate and the floor slab are not recycled. The scheme has the following defects: 1. the steel upright post has higher cost, is cut in sections during dismantling and cannot be reused; 2. a small section of steel upright post left in the bottom plate is strongly connected with the upright post pile, so that the internal force distribution of the structural bottom plate is influenced, and meanwhile, the influence factor is generally difficult to be fully considered during the calculation of the structural bottom plate, so that potential safety hazards such as structural bottom plate cracks and the like exist; 3. in order to ensure the pile forming quality of the upright column pile, ultra-tank concrete is required during construction, the ultra-filling part is chiseled after the foundation pit is excavated to the bottom of the pit, the lattice type steel column and the concrete pile are firmly bonded, and the chiseling difficulty is high thoroughly. Due to the reasons, in the construction process of the upright column, the steel upright column is high in cost, the steel is seriously wasted, and the energy conservation and the environmental protection are not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a recoverable foundation ditch steel stand connecting device, its construction is simple and convenient, and the steel stand can reuse completely, and the commonality is strong.
The technical scheme of the utility model is that: a recoverable foundation pit steel upright post connecting device comprises a steel upright post, a floor connecting device and a bottom plate connecting device; the steel upright column is a lattice type steel column formed by welding and combining angle steel and batten plates; the bottom plate connecting device comprises a connecting section steel pipe and a connecting section flange plate, wherein the connecting section flange plate is positioned at the bottom of the connecting section steel pipe and is connected with a pile top steel plate of the cast-in-place pile through a pile top bolt; the middle parts of the pile top steel plate and the connecting section flange plate are provided with holes, the lower part of the pile top steel plate is welded with a pile top steel ring, and the cast-in-place pile longitudinal ribs are welded with the pile top steel ring; the lower end of the angle steel is embedded into the connecting section steel pipe and is connected with the connecting section steel pipe through an upright post connecting bolt; the floor slab connecting device comprises a bracket arranged on the periphery of the angle steel, and the top of the bracket is connected with the floor slab through a floor slab bolt; the side edge of the bracket is connected with the angle steel through a bracket mounting bolt.
Based on the technical characteristics: the middle part of the batten plate is provided with a group of oblique first long round bolt holes; the bracket is a groove formed by welding steel plates, a group of oblique second long round bolt holes are formed in the bottom of the groove, the inclination direction of the first long round bolt holes is opposite to that of the second long round bolt holes, and the distance between the first long round holes is equal to that between the second long round bolt holes; and the bracket mounting bolt penetrates through the intersection point of the first long round bolt hole and the second long round bolt hole to connect the bracket and the angle steel.
Based on the technical characteristics: the bracket mounting bolts respectively penetrate through any two connecting brackets and angle steel in the intersection points.
Based on the technical characteristics: the connecting section steel pipe is of a two-piece combined structure and is combined into a square steel pipe through the connecting section splicing bolts.
Based on the technical characteristics: the floor is provided with a floor hole frame at the position of the steel upright post, the floor hole frame is formed by welding steel plates and is welded with floor steel bars, floor bolts are arranged at the bottom of the floor hole frame and are connected with the top of the bracket, and the size of the floor hole frame is larger than the size of the outline of the steel upright post.
The device is applicable to the foundation ditch engineering who sets up the interior support, can realize the complete recovery of steel stand, avoids the segmentation to cut off and becomes the waste material. The steel stand of foundation ditch generally is lattice formula steel column, and the lower part is connected with the bored concrete pile, through setting up floor connecting device, bottom plate connecting device and the connecting piece of pile bolck and floor of general type, avoids steel stand and structural slab to water entirely, mainly adopts bolted connection mode combination steel stand device, and bored concrete pile and floor are detachable joint, and after the construction was accomplished, steel stand and connecting device all can be retrieved. The scheme can save a large amount of steel, has strong universality, convenient construction and disassembly, and is energy-saving and environment-friendly.
The beneficial effects of the utility model include: 1. the steel upright post can be completely reused, has strong universality, saves energy and protects environment; 2. the lattice column and the connecting section are not wrapped in the concrete, so that the lattice column and the connecting section are convenient to remove; 3. the cast-in-place pile is not connected with the structural bottom plate, and the stress calculation of the structure is not influenced.
Drawings
Fig. 1 is an overall installation diagram of the present invention.
FIG. 2 is a sectional view taken along the line A-A of the floor slab.
Figure 3 is a cross-sectional view B-B of the floor slab connection.
Fig. 4 is a cross-sectional view of the base plate at the connection means C-C.
Fig. 5 is a cross-sectional view of the connection between the bottom plate connecting device and the pile top.
Fig. 6 is a detailed view of the bracket.
Fig. 7 is a detail view of the bottom plate connecting section component.
FIG. 8 is a schematic diagram of secondary construction within the range of the bottom plate opening after the steel upright post is recovered.
FIG. 9 is a schematic diagram of the installation and construction of the floor slab opening template after the steel upright posts are recovered.
Fig. 10 is a schematic view of the completion of the construction of the floor hole.
Reference numbers in the figures: the steel column is 1, the angle steel is 11, the batten plate is 12, the upright column connecting bolt is 13, the floor connecting device is 2, the bracket is 21, the bracket mounting bolt is 22, the bottom plate connecting device is 3, the connecting section steel pipe is 31, the connecting section flange plate is 32, the connecting section splicing bolt is 33, the cast-in-place pile is 4, the pile top steel plate is 41, the pile top steel ring is 42, the pile top bolt is 43, the cast-in-place pile longitudinal rib is 44, the cast-in-place pile stirrup is 45, the floor is 5, the floor is 51, the floor opening frame is 511, the floor steel bar is 511, the floor bolt is 52, the plate opening bottom template is 53, the bottom plate is 6, the reinforced concrete bottom plate is 61, the bottom plate steel bar is 611, the bottom plate cushion layer is 62, and the foam.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the recoverable foundation pit steel column connecting device comprises a steel column 1, a floor connecting device 2 and a bottom plate connecting device 3.
The steel upright column 1 is a lattice type steel column formed by welding and combining angle steel 11 and a batten plate 12, the batten plate 12 can be a square steel plate, and the middle part of the batten plate is provided with a group of oblique first long round bolt holes.
The floor slab connecting device 2 comprises a bracket 21 and a bracket mounting bolt 22, the bracket 21 is a steel plate welded groove-shaped member, the bottom of the groove is provided with a group of second long round bolt holes, and the batten plate 12 is provided with a group of first long round bolt holes; the distance between the first long round holes is equal to that between the second long round bolt holes, and the inclination directions of the first long round holes and the second long round bolt holes are opposite, as shown in fig. 6; when the bracket 21 moves up and down to any elevation, the slotted bolt holes of the batten plate 12 and the bracket 21 are guaranteed to have two intersection points, two bracket mounting bolts 22 can be mounted, the bracket 21 is reliably mounted on the steel upright post 1, and the brackets 21 are arranged on four surfaces or two surfaces of the steel upright post, as shown in fig. 3.
The top of the bracket 21 is connected with the floor 5, the floor 5 is provided with a hole at the position of the upright column, a floor hole frame 51 is arranged and can be used as a side template for opening a hole, the floor hole frame 51 is formed by welding steel plates, the side plates are welded with floor reinforcing steel bars 511 at the positions of non-hole positions, floor bolts 52 are arranged at the bottom and are connected with the top of the bracket 21, as shown in figures 1 and 2, the size of the floor hole frame 51 is larger than that of the outer contour of the steel upright column 1, and the steel upright column 1 is conveniently drawn out from the hole when the steel upright column 1 is recycled, as shown in figure 2.
The lower end of the angle steel 11 of the steel upright 1 is provided with a bolt hole and is connected with the bottom plate connecting device 3 through an upright connecting bolt 13, as shown in fig. 1 and 4.
The bottom plate connecting device 3 is composed of a connecting section steel pipe 31 and a connecting section flange plate 32, can be of a two-piece combined structure, is combined into a square steel pipe and an annular flange plate through a connecting section splicing bolt 33, and the outer size and the arc-shaped corner of the square steel pipe are consistent with the net size of the inside of a steel upright angle steel, as shown in fig. 4; the middle part of the flange plate is provided with a hole, the inner hole of the flange plate is used for placing a guide pipe when pouring concrete, the connecting section flange plate 32 is provided with a bolt hole and is connected with a pile top steel plate 41 of the pouring pile 4 through a pile top bolt 43, as shown in figures 1, 4, 5 and 7.
The top of the cast-in-place pile 4 is provided with a pile top steel plate 41, the middle part of the cast-in-place pile is provided with a hole for placing a guide pipe downwards when pouring concrete, the lower part of the pile top steel plate 41 is welded with a pile top steel ring 42, and cast-in-place pile longitudinal ribs 44 are welded with the pile top steel ring 42; the pile top steel plate 41 is provided with bolt holes and is connected with the connecting section flange plate 32 through pile top bolts 43. As shown in fig. 1 and 5.
The utility model discloses a construction and recovery method as follows:
(1) and binding the cast-in-place pile longitudinal bars 44 and the cast-in-place pile stirrups 45 into a reinforcement cage, and welding the reinforcement cage with the pile top steel ring 42, as shown in fig. 1 and 5.
(2) The connecting section steel pipe 31 and the connecting section flange plate 32 are spliced into the bottom plate connecting device 3 through the connecting section splicing bolts 33, a release agent is brushed on the inner surface of the connecting section steel pipe 31 to facilitate later-stage disassembly, the bottom and the pile top steel plate 41 are connected into a whole through the pile top bolts 43, the lower end of the angle steel 11 of the steel upright 1 is embedded into the connecting section steel pipe 31 and is connected into a whole with the connecting section steel pipe 31 through the upright connecting bolts 13, and the connecting section steel pipe 31, the connecting section steel pipe and the pile top steel plate are connected into a whole.
(3) And (3) drilling construction of a cast-in-place pile 4, namely putting the integrally connected steel upright post 1, the bottom plate connecting device 3 and the cast-in-place pile 4 steel reinforcement cage into a pile hole, pouring concrete, wherein the elevation of a concrete pouring surface is higher than the designed elevation of the pile top according to the relevant standard, and the concrete exceeding the elevation of the pile top is positioned inside the steel pipe 31 of the connecting section, as shown in fig. 1 and 4.
(4) Excavation foundation ditch topsoil exposes 1 top of steel upright post after, overlaps required each floor basement floor entrance to a cave frame 51 on the upright post pile, deepens along with the excavation depth, and corresponding height can be transferred to floor entrance to a cave frame 51, and floor entrance to a cave frame 51 also can the split be two, and later stage cover is as an organic whole on steel upright post 1 reconnection, as shown in fig. 2.
(5) Constructing each layer of supporting structure, excavating a foundation pit to the bottom of the pit, pouring a bottom plate cushion layer 62 to the edge of the cast-in-place pile 4, properly thickening the cushion layer at the periphery of the cast-in-place pile 4, temporarily reserving holes at the periphery of the connecting section steel pipe 31, not pouring concrete, pouring a reinforced concrete bottom plate 61 in other ranges, and completing the construction of the bottom plate 6, as shown in fig. 1.
(6) When the basement floor 5 is constructed, firstly, the bracket 21 is installed on the steel upright posts 1, the floor opening frame 51 is fixed, the floor reinforcing steel bars 511 at the non-opening position are welded with the floor opening frame 51, the concrete of the floor 5 is poured, and the construction of each layer of basement floor 5 is respectively completed, as shown in fig. 1.
(7) After the basement construction is finished, the corresponding supports are dismantled, and the bracket mounting bolts 22, the upright post connecting bolts 13 and the pile top bolts 43 are respectively removed, so that the steel upright posts 1, the brackets 21 and the connecting section steel pipes 31 are dismantled and recovered. Such as in a splice form, with the splice bolts 33 removed.
(8) Chiseling the cast-in-place pile concrete in the connecting section steel pipe 31, laying a foam board 63 above the pile top, wherein the upper surface of the foam board 63 is flush with the upper surface of the bottom board cushion layer 62, binding bottom board reinforcing steel bars 611 within the reserved hole range of the bottom board 6, and pouring concrete to complete the construction of the reserved hole part of the bottom board 6, as shown in fig. 8.
(9) Floor slab reinforcing steel bars 511 are welded in the floor slab opening frames 51 of each layer, a slab opening bottom formwork 53 is installed at the bottom of the floor slab opening frames 51, the slab opening bottom formwork 53 can be fixed through floor slab bolts 52, and floor slab concrete in the opening range is poured, as shown in fig. 9.
(10) After the strength of the concrete in the slab opening meets the design requirement, the slab opening bottom formwork 53 is removed, and the slab bolts 52 of the exposed part are cut off, so that the construction of the whole basement structure is completed, as shown in fig. 10.
The invention is further described below by way of examples.
Example 1, wherein the angle steel 11 of the steel upright 1 adopts L160X14 equal-edge angle steel, and the outer contour dimension is 470 mm; the batten plates 12 are rectangular steel plates 14mm thick, the vertical arrangement center spacing is 700mm, a group of 45-degree oblique first long round bolt holes are formed in the middle of each batten plate 12, the vertical spacing of the bolt holes is 100mm, the hole length is 70mm, and M20 bolts can be installed; the lower end of the angle steel 11 is provided with an M24 bolt hole, and the upright post connecting bolt 13 is an M24 bolt, as shown in figure 1.
The bracket 21 of the floor slab connecting device 2 is a 12mm steel plate welded into a groove shape, the bottom of the bracket is provided with a group of second long round bolt holes, the hole specification is the same as that of the batten plate, the vertical distance is 100mm, the inclination direction is reverse 45 degrees, as shown in fig. 6, the bracket is connected with the batten plate 12 through a bracket mounting bolt 22, as shown in fig. 1; bracket mounting bolt 22 is an M20 bolt; the top of the bracket 21 is provided with an M20 bolt hole.
The connecting section steel pipe 31 of the bottom plate connecting device 3 is of a two-piece combined structure and is formed by bending a 16mm thick steel plate, the connecting section splicing bolts 33 are combined into a square steel pipe, the outer side length of the steel pipe is 442mm and is the same as the inner size of the steel angle of the steel upright 1, the arc-shaped corner is the same as the inner arc angle of the steel angle 11, and as shown in fig. 4 and 5, the connecting section splicing bolts 33 are M24 bolts; the connecting section flange plate 32 is 30mm thick semicircular ring shape, the inner diameter is 350mm, the outer diameter is 770mm, the steel plate is provided with M30 bolt holes, as shown in figure 7, the steel plate is in a ring shape after being spliced, as shown in figure 5.
The cast-in-place pile 4 is a cast-in-place pile with the diameter of 800mm, the diameter of the cast-in-place pile longitudinal reinforcement 44 is 20mm, and the diameter of the cast-in-place pile stirrup 45 is 10mm, as shown in figure 1; the top of the cast-in-place pile 4 is provided with a pile top steel plate 41 which is a 30mm thick circular steel plate with the outer diameter of 800mm and the middle part with a hole with the diameter of 350mm, and an M30 bolt hole is arranged to be connected with the connecting section flange plate 32, as shown in FIG. 5; the lower part of the pile top steel plate 41 is welded with a pile top steel ring 42, the length of the steel ring is 120mm, the wall thickness is 10mm, the outer diameter of the steel ring is 660mm, the net size of the inner side of the pile top steel ring is the same as that of the longitudinal ribs 44 of the cast-in-place pile, and the outer side of the pile top steel ring 42 is welded with the longitudinal ribs 44 of the cast-in-.
A hole is reserved in the position of the upright column of the floor 5, the size of the hole is 570mmX570mm, a floor hole frame 51 is arranged and is also used as a plate hole side template, the floor hole frame 51 is formed by welding 10mm thick steel plates, the width of each side plate is the same as the thickness of the floor, the side plates are welded with floor steel bars 511, floor bolts 52 are arranged at the bottom of each side plate and are M20 bolts, and the floor bolts are connected with the top of the bracket 21 as shown in figures 1 and 2; the slab cavity bottom formwork 53 adopted when the slab cavity concrete is poured after the steel upright posts are recovered can adopt an 18mm wood formwork.
The thickness of the foam plate 63 arranged above the pile top after the steel upright is recovered is about 100mm, and the foam plate can be adjusted according to site construction errors.
All the parts can be connected and disassembled by welding and bolts; referring to fig. 1 to 10, those skilled in the art of construction and installation can easily perform the operation.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a recoverable foundation ditch steel stand connecting device which characterized in that: comprises a steel upright post (1), a floor slab connecting device (2) and a bottom plate connecting device (3); the steel upright column (1) is a lattice type steel column formed by welding and combining angle steel (11) and batten plates (12); the bottom plate connecting device (3) comprises a connecting section steel pipe (31) and a connecting section flange plate (32), wherein the connecting section flange plate (32) is positioned at the bottom of the connecting section steel pipe (31) and is connected with a pile top steel plate (41) of the cast-in-place pile (4) through a pile top bolt (43); a hole is formed in the middle of the pile top steel plate (41) and the connecting section flange plate (32), a pile top steel ring (42) is welded to the lower portion of the pile top steel plate (41), and a cast-in-place pile longitudinal rib (44) is welded to the pile top steel ring (42); the lower end of the angle steel (11) is embedded into the connecting section steel pipe (31) and is connected with the connecting section steel pipe (31) through an upright post connecting bolt (13); the floor slab connecting device (2) comprises a bracket (21) arranged on the periphery of the angle steel (11), and the top of the bracket (21) is connected with a floor slab (5) through a floor slab bolt (52); the side edge of the bracket (21) is connected with the angle steel (11) through a bracket mounting bolt (22).
2. The recoverable foundation pit steel column connecting device of claim 1, wherein: a group of oblique first long round bolt holes are formed in the middle of the batten plate (12); the bracket (21) is a groove-shaped bracket welded by steel plates, a group of oblique second long round bolt holes are formed in the bottom of the groove shape, the inclination direction of the first long round bolt holes is opposite to that of the second long round bolt holes, and the distance between the first long round bolt holes is equal to that between the second long round bolt holes; and the bracket mounting bolt (22) penetrates through the intersection point of the first long round bolt hole and the second long round bolt hole to connect the bracket (21) and the angle steel (11).
3. The recoverable foundation pit steel column connecting device of claim 2, wherein: and the bracket mounting bolts (22) respectively penetrate through any two positions in the intersection points to connect the bracket (21) and the angle steel (11).
4. The recoverable foundation pit steel column connecting device of claim 1, wherein: the connecting section steel pipe (31) is of a two-piece combined structure and is combined into a square steel pipe through a connecting section splicing bolt (33).
5. The recoverable foundation pit steel column connecting device of claim 1, wherein: floor (5) are in steel stand (1) position department sets up floor entrance to a cave frame (51), forms for the steel sheet welding, with floor reinforcing bar (511) welding, floor entrance to a cave frame (51) bottom sets up floor bolt (52), with bracket (21) top is connected, floor entrance to a cave frame (51) size is greater than steel stand (1) outline size.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020957706.8U CN212772377U (en) | 2020-05-20 | 2020-05-20 | Recoverable foundation pit steel stand connecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020957706.8U CN212772377U (en) | 2020-05-20 | 2020-05-20 | Recoverable foundation pit steel stand connecting device |
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| CN212772377U true CN212772377U (en) | 2021-03-23 |
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| CN202020957706.8U Active CN212772377U (en) | 2020-05-20 | 2020-05-20 | Recoverable foundation pit steel stand connecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250345A (en) * | 2021-05-29 | 2021-08-13 | 中铁建设集团华北工程有限公司 | Connecting mechanism for wall corner of assembled house and construction process of connecting mechanism |
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2020
- 2020-05-20 CN CN202020957706.8U patent/CN212772377U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250345A (en) * | 2021-05-29 | 2021-08-13 | 中铁建设集团华北工程有限公司 | Connecting mechanism for wall corner of assembled house and construction process of connecting mechanism |
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