CN212801565U - Connecting joint and supporting system of concrete-filled steel tube support and crown beam - Google Patents
Connecting joint and supporting system of concrete-filled steel tube support and crown beam Download PDFInfo
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- CN212801565U CN212801565U CN202021565785.4U CN202021565785U CN212801565U CN 212801565 U CN212801565 U CN 212801565U CN 202021565785 U CN202021565785 U CN 202021565785U CN 212801565 U CN212801565 U CN 212801565U
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Abstract
The utility model belongs to the technical field of foundation pit engineering, in particular to a connecting node of a concrete-filled steel tube support and a crown beam, wherein a second U-shaped steel plate is fixed at the end part of the concrete-filled steel tube support, a first U-shaped steel plate is fixed at the inner side of the crown beam, and a plurality of rows of long round bolt holes are respectively arranged on two side plates of the first U-shaped steel plate and two side plates of the second U-shaped steel plate; the first U-shaped steel plate and the second U-shaped steel plate are centered to form a U-shaped groove, and long round bolt holes in the two side plates of the first U-shaped steel plate are connected with long round bolt holes in the two side plates of the second U-shaped steel plate through bolts. The utility model also provides a braced system, it supports to have the steel pipe concrete to support between the both sides that its hat roof beam is relative, and the connected node that hat roof beam and steel pipe concrete supported adopts foretell connected node. The utility model discloses can satisfy the rigid connection of tip node, wait the needs of strong connection, guarantee engineering safety, can adjust the deflection as required again simultaneously, adjust construction error.
Description
Technical Field
The utility model belongs to the technical field of underground foundation ditch engineering, concretely relates to concrete filled steel tube supports connected node and braced system with guan liang.
Background
Traditional cast in situ concrete supports, because of its rigidity is big, the wholeness is good, advantages such as safe and reliable, generally apply to underground works, nevertheless also have outstanding problem and shortcoming: (1) cost, high investment: concrete support belongs to temporary engineering, a main body of a station structure is finished, namely outward transportation is broken, the investment of temporary waste engineering is high, generally, underground stations are millions, complex stations are tens of millions, and the cost of complex stations is tens of millions; (2) time-consuming and long construction period: supporting a formwork by concrete, binding reinforcing steel bars, pouring and vibrating, maintaining and removing at the later stage, wherein the whole process is long for several months, and the site construction progress is seriously restricted; (3) hard, the degree of difficulty is big: the concrete support construction difficulty is high, and a large amount of manpower and material resources are consumed to break the construction after the use; (4) the concrete is not environment-friendly, the waste residues of the concrete are broken to pollute the environment, and the development direction of green construction, environmental protection and energy conservation is not met. Therefore, advanced products and scientific construction methods are urgently needed to replace the traditional concrete support.
Although traditional steel pipe props can retrieve, it is comparatively convenient to be under construction, but can only bear pressure between its and foundation ditch retaining structure, and the wholeness is relatively poor, and resistance to deformation ability is poor, becomes the weak link of foundation ditch safety.
In the existing prefabricated support, weak links are more at connecting nodes, and rigid connection cannot be realized at the nodes, so that the overall stability of a foundation pit is insufficient; and the support segments prefabricated in the factory have standard lengths, and errors always exist in the construction process.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a steel pipe concrete supports connected node and braced system with the hat roof beam, can satisfy the rigidity of tip node, wait the needs of strong connection, guarantee engineering safety, can adjust the shift as required again simultaneously, adjust construction error.
In order to achieve the purpose, the technical scheme of the utility model is a connecting node of a concrete-filled steel tube support and a crown beam, which comprises the concrete-filled steel tube support and the crown beam; a second U-shaped steel plate is fixed at the end part of the concrete-filled steel tube support, a first U-shaped steel plate is fixed on the inner side of the crown beam, and a plurality of rows of long round bolt holes are formed in the two side plates of the first U-shaped steel plate and the two side plates of the second U-shaped steel plate; the first U-shaped steel plate and the second U-shaped steel plate are centered to form a U-shaped groove, and long round bolt holes in the two side plates of the first U-shaped steel plate are connected with long round bolt holes in the two side plates of the second U-shaped steel plate through bolts.
Further, the concrete-filled steel tube support is formed by splicing a plurality of concrete-filled steel tube support prefabricated parts, and the lengths of the concrete-filled steel tube support prefabricated parts are completely the same, not completely the same or completely different.
Further, the concrete-filled steel tube support prefabricated member comprises a steel tube and a joint steel plate, wherein concrete is filled in the steel tube, and a hollow part penetrating through the concrete along the axial direction is formed in the concrete; a steel reinforcement framework is arranged in the concrete; annular joint steel plates are welded at two ends of the steel pipe, the inner sides of the joint steel plates are connected with the steel reinforcement framework, and the outer sides of the joint steel plates are located on the outer side of the steel pipe.
Furthermore, the part of the joint steel plate extending out of the steel pipe is provided with a plurality of bolt holes along the annular direction, and the corresponding bolt holes on the adjacent joint steel plates of the adjacent concrete-filled steel tube support prefabricated member are respectively connected through bolts.
Furthermore, the inner side and the outer side of the two ends of the steel pipe are respectively provided with a joint inner lining pipe and a joint outer lining pipe, and the joint inner lining pipe and the joint outer lining pipe are welded with the joint steel plate.
Furthermore, the inner sides of two ends of the concrete are respectively provided with an inner wrapping pipe, and the inner wrapping pipes are welded with the joint steel plates; and a circle of meshing teeth are arranged on the inner wrapping pipe and embedded into the concrete.
Furthermore, a plurality of studs are welded on the inner wall of the steel pipe, and the studs are embedded in the concrete.
Furthermore, a plurality of anchor bolts are pre-buried in the crown beam, the first U-shaped steel plate is welded on the end steel plate, a plurality of anchor bolt holes are formed in the end steel plate, one end of each anchor bolt extends out of the corresponding anchor bolt hole which is formed in the rear of the crown beam in a penetrating mode, and the anchor bolt holes are fixed through nuts.
The utility model also provides a supporting system, which comprises an enclosure structure, a crown beam and a steel pipe concrete support; the top of the enclosure structure is provided with a crown beam, and the steel pipe concrete support is supported between two opposite sides of the crown beam; the connecting node of the crown beam and the concrete-filled steel tube support adopts the connecting node.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a second U-shaped steel sheet at the concrete filled steel tube support tip and the first U-shaped steel sheet of hat roof beam inboard set up multiseriate long circle bolt hole respectively, and then pass the long circle bolt hole through the bolt and connect first U-shaped steel sheet and second U-shaped steel sheet, can satisfy the rigid connection of tip node, wait strong connection's needs, guarantee engineering safety, can adjust the aversion as required simultaneously again, adjust the construction error;
(2) the concrete-filled steel tube support is formed by splicing a plurality of concrete-filled steel tube support prefabricated parts which have the same length, are not identical or are different, is suitable for foundation pits with different widths and different lengths, adopts rigid connection for the intermediate node, can ensure the safety and stability of foundation pit engineering, is convenient to install and disassemble, and is convenient for industrial production and large-area popularization and application;
(3) the utility model discloses a steel core concrete supports prefab adopts the hollow member of steel pipe intussuseption concrete, not only can greatly reduced prefabricated component's weight, and the prefabricated component's of being convenient for recycles, and the hoop effect of outer steel pipe can show the bearing capacity that promotes the intussuseption concrete moreover for hollow steel core concrete supports that bearing capacity is higher, anti deformability is stronger, ensures foundation ditch engineering safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a plan view of a support system according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a concrete filled steel tube support preform according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a joint of precast concrete filled steel tube support members according to an embodiment of the present invention;
FIG. 4 is a longitudinal sectional view of a joint of a concrete filled steel tube support prefabricated member provided by an embodiment of the present invention;
fig. 5 is a top view of a connection node of a concrete filled steel tube support and a crown beam provided by an embodiment of the present invention;
fig. 6 is a cross-sectional view of a connection node of a concrete filled steel tube support and a crown beam provided by an embodiment of the present invention;
fig. 7 is a left side view of a first U-shaped steel plate according to an embodiment of the present invention;
fig. 8 is a right side view of a second U-shaped steel plate according to an embodiment of the present invention;
fig. 9 is a schematic connection diagram of an end steel plate and a first U-shaped steel plate according to an embodiment of the present invention;
in the figure: 1. a steel pipe concrete support prefabricated member; 2. a crown beam; 3. an enclosure structure; 4. a steel pipe; 5. a stud; 6. concrete; 7. longitudinal ribs; 8. a spiral stirrup; 9. a hollow part; 10. a joint steel plate; 11. a bolt; 12. a stiffening plate; 13. an outer joint liner tube; 14. a joint liner tube; 15. an inner wrapping pipe; 16. engaging teeth; 17. an anchor bolt; 18. end steel plates; 19. a nut; 20. a first U-shaped steel plate; 21. a second U-shaped steel plate; 22. a jack; 23. plug welding of the through hole; 24. a control system; 25. a wire; 26. a long round bolt hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example one
As shown in fig. 5 to 6, the present embodiment provides a connection node of a concrete-filled steel tube support and a crown beam, comprising the concrete-filled steel tube support and the crown beam 2; a second U-shaped steel plate 21 is fixed at the end part of the steel tube concrete support, a first U-shaped steel plate 20 is fixed on the inner side of the crown beam 2, and a plurality of rows of long round bolt holes 26 are formed in two side plates of the first U-shaped steel plate 20 and two side plates of the second U-shaped steel plate 21; the first U-shaped steel plate 20 and the second U-shaped steel plate 21 are aligned to form a U-shaped groove, and the oblong bolt holes 26 in the two side walls of the first U-shaped steel plate 20 are connected with the oblong bolt holes 26 in the two side walls of the second U-shaped steel plate 21 through bolts 11. In this embodiment, a plurality of rows of long circular bolt holes 26 with adjustable positions are formed in the first U-shaped steel plate 20 and the second U-shaped steel plate 21, the long circular bolt holes 26 are arranged along the supporting direction, the first U-shaped steel plate 20 and the second U-shaped steel plate 21 are connected by the bolts 11 penetrating through the long circular bolt holes 26, the end nodes of the concrete-filled steel tube support and the crown beam 2 adopt the variable-length round hole steel box slot nodes, the rigid connection and equal-strength connection requirements of the end nodes can be met, the engineering safety is guaranteed, meanwhile, the relative positions of the long circular bolt holes 26 can be adjusted according to requirements to change the lengths of joints, errors in construction are eliminated, and construction errors are adjusted.
Further, the concrete-filled steel tube support is formed by splicing a plurality of concrete-filled steel tube support prefabricated parts 1, and the lengths of the plurality of concrete-filled steel tube support prefabricated parts 1 are completely the same, not completely the same or completely different. The concrete filled steel tube supporting prefabricated part 1 in the embodiment can be provided with a plurality of fixed modulus sections with proper lengths according to needs, the fixed modulus sections are too long to be hoisted, and joints are too many and difficult to connect due to too short length; as an implementation mode, the middle-section prefabricated components can be designed into standard modules with specifications of 4m, 5m, 6m and the like, the end-section prefabricated components can be designed into standard modules with specifications of 2m, and the concrete-filled steel tube support prefabricated components 1 with completely the same, incompletely the same or completely different length specifications are selected to be combined according to the actual foundation pit requirements, so that the requirements of foundation pit supports with different widths and lengths are met, and the universal applicability is realized. In addition, the concrete-filled steel tube support prefabricated member in the embodiment can adopt a hollow structure, because concrete in the center of the steel tube has limited contribution to the bearing capacity, integrity and rigidity of the member, the removal of the concrete does not obviously reduce the bearing capacity of the member, but can obviously reduce the weight of the member, thereby facilitating the installation, transportation and disassembly, and the concrete-filled steel tube support prefabricated member also can adopt a solid structure.
As an implementation method, the steel tube concrete support prefabricated part 1 comprises a steel tube 4 and a joint steel plate 10, wherein the steel tube 4 is filled with concrete 6, and a hollow part 9 penetrating through the concrete 6 along the axial direction is arranged in the concrete; a steel reinforcement framework is arranged in the concrete 6; annular joint steel plates 10 are welded at two ends of the steel pipe 4, the inner sides of the joint steel plates 10 are connected with the steel reinforcement framework, and the outer sides of the joint steel plates 10 are located outside the steel pipe 4. The precast concrete-filled steel tube support member 1 of the embodiment is a hollow member formed by filling concrete 6 in a steel tube 4, not only can the advantages of two materials of steel and concrete be fully exerted, and has high cost performance and obvious economic benefit compared with a pure steel support, and compared with a concrete-sized concrete support, the precast concrete-filled steel tube support member has higher rigidity, and the steel tube 4 is an outer skin of the precast support member, so that the internally filled concrete 6 can be protected from being damaged, and can be detached after the engineering is finished, the precast member can be recycled for many times, meanwhile, the bearing capacity of the internally filled concrete 6 can be obviously improved under the action of the hoop of the steel tube 4, the hollow steel tube concrete support member has high bearing capacity (strength), and the deformation resistance (rigidity) is strong, and the same or even higher strength and rigidity of the conventional concrete support member can be achieved, and the. In addition, the steel reinforcement cage in the concrete 6 in this embodiment is connected to the joint steel plate 10, further increasing the integrity of the steel pipe concrete support preform 1.
In the embodiment, the section of the steel pipe 4 can be circular, square, pentagonal, polygonal and the like, the thickness of the steel pipe 4 can be 8-20mm, the steel pipe 4 can be made of high-strength steel or alloy steel, the stress is met, and the steel pipe is easy to weld; the concrete 6 filled in the steel tube 4 can be ultra-high strength concrete, light high strength concrete, foam concrete and the like, but the strength requirement is required to be met, the weight is not too large, the thickness is small under the condition of meeting the supporting rigidity, and the self weight of the prefabricated part is reduced; the hollow part can be not provided with any inner wall, or can be in the form of the inner wall, the material of the inner wall can be steel pipes, PVC and the like, the section of the inner wall is not limited to be circular, and the inner wall can also be in various shapes such as square, polygon and the like; the joint steel plate 10 can be a circular or square flange, and the joint steel plate 10 and the steel pipe 4 can be prefabricated into a whole or can be welded into a whole after being prefabricated in a split mode.
Furthermore, a plurality of bolt holes are formed in the circumferential direction of the part of the joint steel plate 10 extending out of the steel tube 4, and the corresponding bolt holes on the adjacent joint steel plates 10 of the adjacent concrete filled steel tube support prefabricated member 1 are respectively connected through bolts 11. The concrete filled steel tube supports prefab 1 of this embodiment and concrete filled steel tube supports prefab 1 and passes through bolt 11 and realize rigid connection, realizes that the equal strength of node and component reaches wholeness, rigidity and bearing capacity similar with cast in situ concrete support, ensures foundation ditch safety, and the installation with dismantle conveniently, be convenient for batch production preparation and large tracts of land popularization and application.
The bolt 11 of the embodiment can be a high-strength bolt or a mechanical bolt, and the stress requirement can be met; as shown in fig. 3, in this embodiment, one row or multiple rows of bolt holes may be formed in the joint steel plate 10 along the circumferential direction, each row of bolt holes is multiple, corresponding bolt holes in adjacent joint steel plates 10 are all connected rigidly through bolts 11, and stiffening plates 12 are welded between every two rows of bolts 11, so as to ensure the rigid connection of the intermediate nodes, achieve equal-strength connection between the nodes and the members, ensure that the assembled support has similar or even higher strength and rigidity of the cast-in-place concrete support, and ensure the safety and stability of the foundation pit engineering.
Furthermore, the inner side and the outer side of the two ends of the steel pipe 4 are respectively provided with a joint inner lining pipe 14 and a joint outer lining pipe 13, and both the joint inner lining pipe 14 and the joint outer lining pipe 13 are welded with the joint steel plate 10. As shown in fig. 3 and 4, a joint inner lining pipe 14 and a joint outer lining pipe 13 are respectively arranged on the inner side and the outer side of each end of the steel pipe 4 in the embodiment, and both the joint inner lining pipe 14 and the joint outer lining pipe 13 are reliably welded with the steel pipe 4 and the joint steel plate 10, so that a weak stress link at the joint of the joint steel plate 10 and the steel pipe 4 is eliminated; the joint inner lining pipe 14 and the joint outer lining pipe 13 are made of steel or alloy materials, the wall thickness is preferably 10-20mm, the length is preferably 0.5-1.0m, and the stress transition of the joint is met.
Further, the portion of the joint steel plate 10 extending out of the steel pipe 4 is connected to the joint outer liner 13 through a stiffener 12. As shown in fig. 3, in this embodiment, the connection rigidity between the joint steel plate 10 and the steel pipe 4 is increased by the stiffening plate 12, and the size and thickness of the stiffening plate 12 are controlled according to calculation and size requirements; as an embodiment, as shown in fig. 4, a plurality of stiffening plates 12 may be arranged at intervals along the circumference of the steel pipe 4, the thickness may be 10-20mm, the size is determined according to the stress, and the surplus is reserved.
Furthermore, the inner sides of the two ends of the concrete 6 are respectively provided with an inner wrapping pipe 15, and the inner wrapping pipes 15 are welded with the joint steel plates 10; optimally, a circle of meshing teeth 16 are arranged on the inner wrapping pipe 15, and the meshing teeth 16 are embedded in the concrete 6. As shown in fig. 3 and 4, in the present embodiment, the inner cladding pipe 15 is welded to the joint steel plate 10 on the inner side of the concrete 6 to protect the end concrete; meanwhile, a circle of meshing teeth are arranged on the inner side of the inner wrapping pipe 15 and are meshed into the concrete 6, and the integrity of the steel pipe concrete support prefabricated part 1 is further improved. The wall thickness of the inner wrapping pipe 15 of the embodiment is preferably 8-15mm, the inward extending length is 0.3-0.5m, the material is steel or alloy material, but reliable welding with the joint steel plate 10 is required; 8-12 meshing teeth 16 are uniformly arranged along the circumferential direction, the meshing teeth 16 are square, the side length is 30-50mm, the thickness is the same as that of the inner packing tube 15, and the inner packing concrete 6 is recessed to realize the tight meshing of the meshing teeth and the inner packing concrete.
Furthermore, a plurality of studs 5 are welded on the inner wall of the steel pipe 4, and the studs 5 are embedded in the concrete 6. As shown in fig. 2, in this embodiment, the stud 5 may be welded on the surface of the steel strip before the steel pipe 4 is manufactured, and when the steel pipe 4 is manufactured, the stud 5 is located on the inner wall of the steel pipe 4, and the stud 5 is embedded in the concrete 6, so as to increase the reliable connection between the steel pipe 4 and the internal concrete 6; the number of the studs 5 is preferably 8-10 per circle, and the length is preferably 20-50 mm; optimally, an anchor head can be arranged at one end of the stud 5, which is far away from the inner wall of the steel tube 4, so that the tight connection effect between the concrete 6 and the steel tube 4 is enhanced.
Further, the framework of steel reinforcement includes spiral stirrup 8 and many vertical bars 7, and many vertical bars 7 are followed spiral stirrup 8's inboard interval arrangement and all with spiral stirrup 8 is connected. As shown in fig. 2 and 4, in the concrete 6 of the present embodiment, the spiral stirrup 8 and the plurality of longitudinal bars 7 are arranged along the supporting direction, the spiral stirrup 8 is preferably made of first-grade steel with a diameter of 8-14mm, and the joint areas at both ends are encrypted at intervals; the longitudinal bars 7 are arranged close to the inner side, the diameter and the arrangement number of the longitudinal bars can be determined according to the actual situation, and the thickness of the internal concrete protective layer is preferably 50mm-80 mm; the end part of the longitudinal bar 7 is connected with the joint steel plate 10 through the perforation plug welding 23, the joint steel plate 10 is inwards concave and anchored into the concrete 6, the joint steel plate 10 and the concrete 6 are effectively integrated, and the connection strength and the rigidity of the joint steel plate 10 and the concrete filled steel tube are enhanced.
In this embodiment, steel pipe 4, peg 5, spiral stirrup 8, vertical muscle 7 are tightly connected with the concrete 6 of steel pipe 4 intussuseption as an organic whole, and intensity is high, rigidity is big, far exceeds concrete size concrete support, and is not fragile in the use, but steel pipe concrete support prefab 1 manifold cycles uses, for traditional concrete support, the investment is low, the time limit for a project is short, the quality is high, for traditional steel support, the wholeness is good, rigidity is big, safe and reliable.
Furthermore, a plurality of anchor bolts 17 are pre-buried in the crown beam 2, the first U-shaped steel plate 20 is welded on the end steel plate 18 with equal strength, a plurality of anchor bolt holes are formed in the end steel plate 18, and one end of each anchor bolt 17 extends out of the crown beam 2 and then penetrates through the corresponding anchor bolt hole and is fixed through a nut 19. In the embodiment, the anchor bolt 17 is in place when the steel bars are bound on the crown beam 2 and is reliably connected with the steel bars in the crown beam 2 and poured into the concrete of the crown beam 2, and the anchor bolt 17 needs to have enough anchoring length in the crown beam 2; when the end steel plate 18 is installed, the anchor bolt 17 penetrates through the anchor bolt hole in the end steel plate 18, and the nut 19 is screwed, so that the installation is simple and convenient, and the connection is reliable; the nut 19 is preferably provided with two backing plates below, so that failure damage or looseness of one is avoided.
Furthermore, as shown in fig. 9, the outer wall of the first U-shaped steel plate 20 is connected to the end steel plate 18 through the stiffener 12, so as to increase the connection rigidity between the first U-shaped steel plate 20 and the end steel plate 18, the stiffener 12 may be arranged at intervals along the circumferential direction of the first U-shaped steel plate 20, and the size and thickness of the stiffener may be determined according to the force, so as to reserve redundancy.
Further, as shown in fig. 6, the second U-shaped steel plate 21 is welded with equal strength to an end steel plate, and the end steel plate is connected with the joint steel plate 10 through a bolt 11, so as to facilitate the detachment of the end node; the end steel plate is solid and can be square or round.
Example two
As shown in fig. 1, the present embodiment provides a support system including a building envelope 3, a crown beam 2, and a concrete filled steel tube support; the top of the envelope structure 3 is provided with a crown beam 2, and the steel pipe concrete support is supported between two opposite sides of the crown beam 2; the connection node of the crown beam 2 and the concrete-filled steel tube support adopts the connection node provided by the first embodiment.
Further, envelope 3's inboard still is equipped with the waist rail, supports between the relative both sides of waist rail and has the steel core concrete supports, and the waist rail with the connected node that steel core concrete supported also can adopt the connected node that embodiment one provided, realizes waist rail and assembled steel core concrete support rigid connection to the realization is in the super deep basal pit, and assembled steel core concrete supports the multichannel tradition concrete support of fungible, improves the assembly rate.
EXAMPLE III
As shown in fig. 2 to 9, the present embodiment provides a construction method of a connection node of a concrete filled steel tube support and a crown beam, including the following steps:
s1, manufacturing a concrete filled steel tube support prefabricated part 1 in a factory according to a design drawing;
s2, when the crown beam 2 is constructed, embedding the anchor bolt 17 in the crown beam 2, and enabling one end of the anchor bolt 17 to extend out of the inner side of the crown beam 2;
s3, after the crown beam 2 reaches the design strength, welding a first U-shaped steel plate 20 on the end steel plate 18, and then installing the end steel plate 18 on the crown beam 2 to enable the anchor bolt 17 on the crown beam 2 to penetrate through the anchor bolt hole on the end steel plate 18 and be fixed through the nut 19;
s4, transporting the steel pipe concrete support prefabricated part 1 to a construction site, and connecting and assembling the steel pipe concrete support prefabricated part 1 into a steel pipe concrete support through bolts 11;
s5, fixing the second U-shaped steel plate 21 and the end part of the concrete-filled steel tube support;
s6, aligning the first U-shaped steel plate 20 and the second U-shaped steel plate 21 to form a U-shaped groove, placing a jack 22 in the U-shaped groove, and pressurizing to enable the pressure of the jack 22 to reach a designed value;
and S7, inserting the bolts 11 into the oblong bolt holes 26 corresponding to the first U-shaped steel plate 20 and the second U-shaped steel plate 21 and screwing the bolts to complete the construction of the connection node of the concrete-filled steel tube support and the crown beam 2.
The outside steel pipe 4 of this embodiment has the effect of dado, the concrete filled steel tube supports prefab 1 and is difficult for receiving the damage, and all adopt bolted connection between the concrete filled steel tube supports prefab 1 and between concrete filled steel tube supports prefab 1 and the hat roof beam, realize dismantling easily, therefore, after foundation ditch engineering construction finishes, can demolish the bolt 11 of connecting concrete filled steel tube supports prefab 1 and hat roof beam and the bolt 11 of connecting concrete filled steel tube supports prefab 1 and concrete filled steel tube supports prefab 1, realize the recovery of concrete filled steel tube supports prefab 1, but recycle many times simultaneously, and the cost is reduced.
The concrete method for manufacturing the steel tube concrete support prefabricated member 1 in the factory in the step S1 comprises the following steps:
s11, preparing a steel pipe 4, a joint steel plate 10, a spiral stirrup 8, a longitudinal bar 7, a stiffening plate, a joint inner lining pipe 14, a joint outer lining pipe 13 and an inner cladding pipe 15 according to a design drawing;
s12, reserving a stud 5 on the inner wall of the steel pipe 4 during manufacturing, and arranging a spiral stirrup 8 and a longitudinal rib 7 in the steel pipe 4;
s13, welding joint steel plates 10 at two ends of the steel pipe 4 respectively;
s14, welding a joint inner lining pipe 14 and a joint outer lining pipe 13 on the inner side and the outer side of each end of the steel pipe 4 respectively, and enabling the joint inner lining pipe 14 and the joint outer lining pipe 13 to be connected with the steel pipe 4 and the joint steel plate 10;
s15, connecting the joint steel plate 10 with the longitudinal ribs 7 through the perforation plug welding 23;
s16, placing the inner tube 15 with the outer wall provided with the meshing teeth 16 in the spiral stirrup 8 and welding the inner tube with the joint steel plate 10; welding a stiffening plate 12, so that one end of the stiffening plate is welded on the joint outer liner pipe 13, and the other end of the stiffening plate is welded on the joint steel plate 10;
and S17, filling concrete 6 into the steel pipe 4 and reserving the hollow part 9, thereby completing the manufacture of the steel pipe concrete support prefabricated member 1.
In the manufacturing method of the steel pipe concrete support prefabricated part 1, the joint steel plate 10 and the steel pipe 4 are directly prefabricated into a whole, as another embodiment, the joint steel plate 10 and the steel pipe 4 can be also prefabricated into a whole in a split mode, specifically, after the steel pipe 4 is manufactured, the spiral stirrup 8 and the longitudinal rib 7 are firstly configured in the steel pipe 4, then the joint lining pipe 14 and the joint lining pipe 13 are respectively welded on the inner side and the outer side of the two ends of the steel pipe 4, then the inner side of the end part of the joint lining pipe 14 is welded with the outer side of an annular steel plate, the annular steel plate is connected with the longitudinal rib 7 through the perforation plug welding 23, the inner wrapping pipe 15 is welded on the inner side of the annular steel plate, then the steel pipe 4 is filled with concrete 6, the hollow part 9 is reserved, and the prefabrication of the steel pipe concrete; and finally, welding the joint inner lining pipe 14, the joint outer lining pipe 13, the steel pipe 4, the annular steel plate and the inner clad pipe 15 with the joint steel plate 10, welding the stiffening plate 12 to enable one end of the stiffening plate to be welded on the joint outer lining pipe 13 and the other end of the stiffening plate to be welded on the joint steel plate 10, and connecting the prefabricated steel pipe concrete part and the joint steel plate 10 into a whole to finish the manufacturing of the steel pipe concrete support prefabricated member 1.
In the embodiment, concrete 6 can be filled in the steel tube 4 by adopting a centrifugal process, so that an internal hollow can be automatically formed, the steel tube 4 can be used as an external template of the centrifugal process without being detached, and meanwhile, compared with the conventional cast-in-place vibration process, the centrifugal process is convenient for realizing high-strength concrete, and the hollow steel tube concrete has higher bearing capacity and deformation resistance and better durability; other processes may also be used to accomplish this.
Specifically, in step S4, the concrete filled steel tube support prefabricated member 1 is assembled into the concrete filled steel tube support by the following specific method: the two concrete filled steel tube supporting prefabricated parts 1 are centered, so that the joint steel plates 10 adjacent to the two concrete filled steel tube supporting prefabricated parts 1 are completely aligned, the bolts 11 are inserted into the corresponding bolt holes in the adjacent joint steel plates 10 and screwed down, the concrete filled steel tube supporting prefabricated parts 1 are sequentially connected, and the concrete filled steel tube supporting splicing is completed.
The concrete-filled steel tube support prefabricated members 1 of the embodiment are connected through a plurality of high-strength bolts on the joint steel plates 10; the joint steel plate 10 and the steel pipe 4 can be integrally manufactured or welded, the firmness is increased through the stiffening plate 12, the force transmission is increased through the joint inner lining pipe 14 and the joint outer lining pipe 13, the longitudinal ribs 7 are connected with the joint steel plate 10 through the perforated plug welding 23, and the rigidity of the middle connecting node can be completely ensured.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a steel pipe concrete supports connected node with crown beam which characterized in that: the steel tube concrete support and the crown beam are included; a second U-shaped steel plate is fixed at the end part of the concrete-filled steel tube support, a first U-shaped steel plate is fixed on the inner side of the crown beam, and a plurality of rows of long round bolt holes are formed in the two side plates of the first U-shaped steel plate and the two side plates of the second U-shaped steel plate; the first U-shaped steel plate and the second U-shaped steel plate are centered to form a U-shaped groove, and long round bolt holes in the two side plates of the first U-shaped steel plate are connected with long round bolt holes in the two side plates of the second U-shaped steel plate through bolts.
2. A concrete filled steel tube support and crown beam connection node as claimed in claim 1, wherein: the concrete-filled steel tube support is formed by splicing a plurality of concrete-filled steel tube support prefabricated parts, and the lengths of the concrete-filled steel tube support prefabricated parts are completely the same, incompletely the same or completely different.
3. A concrete filled steel tube support and crown beam connection node as claimed in claim 2, wherein: the steel pipe concrete support prefabricated part comprises a steel pipe and a joint steel plate, wherein concrete is filled in the steel pipe, and a hollow part which penetrates through the concrete along the axial direction is formed in the concrete; a steel reinforcement framework is arranged in the concrete; annular joint steel plates are welded at two ends of the steel pipe, the inner sides of the joint steel plates are connected with the steel reinforcement framework, and the outer sides of the joint steel plates are located on the outer side of the steel pipe.
4. A concrete filled steel tube support and crown beam connection node as claimed in claim 3, wherein: the joint steel plate extends to the part outside the steel pipe and is provided with a plurality of bolt holes along the annular direction, and the adjacent bolt holes corresponding to the adjacent joint steel plates of the concrete filled steel tube support prefabricated member are respectively connected through bolts.
5. A concrete filled steel tube support and crown beam connection node as claimed in claim 3, wherein: and the inner side and the outer side of the two ends of the steel pipe are respectively provided with a joint inner lining pipe and a joint outer lining pipe, and the joint inner lining pipe and the joint outer lining pipe are welded with the joint steel plate.
6. A concrete filled steel tube support and crown beam connection node as claimed in claim 3, wherein: inner wrapping pipes are arranged on the inner sides of the two ends of the concrete and are welded with the joint steel plates; and a circle of meshing teeth are arranged on the inner wrapping pipe and embedded into the concrete.
7. A concrete filled steel tube support and crown beam connection node as claimed in claim 3, wherein: and a plurality of studs are welded on the inner wall of the steel pipe and embedded into the concrete.
8. A concrete filled steel tube support and crown beam connection node as claimed in claim 1, wherein: a plurality of anchor bolts are pre-buried in the crown beam, a U-shaped steel plate is welded on an end steel plate, a plurality of anchor bolt holes are formed in the end steel plate, one end of each anchor bolt extends out of the corresponding anchor bolt hole formed in the back of the crown beam in a penetrating mode, and the anchor bolt holes are fixed through nuts.
9. A support system, characterized by: the steel pipe concrete support comprises a building envelope, a crown beam and a steel pipe concrete support; the top of the enclosure structure is provided with a crown beam, and the steel pipe concrete support is supported between two opposite sides of the crown beam; the connecting joint of the crown beam and the concrete filled steel tube support adopts the connecting joint of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021565785.4U CN212801565U (en) | 2020-07-31 | 2020-07-31 | Connecting joint and supporting system of concrete-filled steel tube support and crown beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021565785.4U CN212801565U (en) | 2020-07-31 | 2020-07-31 | Connecting joint and supporting system of concrete-filled steel tube support and crown beam |
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| CN212801565U true CN212801565U (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030989A (en) * | 2020-07-31 | 2020-12-04 | 中铁第四勘察设计院集团有限公司 | Connecting joint of concrete-filled steel tube support and crown beam, construction method and support system |
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2020
- 2020-07-31 CN CN202021565785.4U patent/CN212801565U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030989A (en) * | 2020-07-31 | 2020-12-04 | 中铁第四勘察设计院集团有限公司 | Connecting joint of concrete-filled steel tube support and crown beam, construction method and support system |
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