Connecting structure of cross-joint steel lattice stand column and diagonal bracing beam

Abstract

The utility model discloses a connecting structure of a cross-joint steel lattice stand column and a diagonal bracing beam. The connecting structure comprises the steel lattice stand column and two annular steel frames. The bottoms of the steel lattice stand columns stand in the concrete foundation, and the tops of the steel lattice stand columns penetrate into the horizontal diagonal bracing beams on the two sides of the parting seam. The annular steel frames are symmetrically fixed to the two sides of the steel lattice stand column at the joint of the horizontal diagonal bracing beam and the steel lattice stand column, and the horizontal diagonal bracing beam is wrapped in the annular steel frames. According to the utility model, the efficient and stable connection between the steel lattice upright post and the horizontal opposite supporting beams on the two sides of the parting is realized, the overall performance of a foundation pit supporting structure can be greatly improved, and the engineering investment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building foundation pit engineering, in particular to a cross-seam connection structure for steel lattice columns and horizontal bracing beams at seam positions. Background Art

[0002] In construction projects, steel lattice columns are a commonly used temporary support structure, which is widely used in foundation pit projects. In the foundation pit support structure system, the bracing beams on both sides of the joint are generally supported vertically by relatively independent steel lattice columns, which causes a lot of economic waste. At the same time, due to factors such as the foundation treatment of the steel lattice columns and the uneven upper loads, the bracing beams on both sides of the joint often have problems such as uneven seam width and uneven deformation. Therefore, in order to solve the vertical support problem of the bracing beams on both sides of the joint, it is urgent to develop a new connection structure with simple construction, low cost and stable connection. Utility Model Content

[0003] The utility model provides a connection structure between a cross-slot steel lattice column and a bracing beam, which is a more economical and reliable connection structure between a cross-slot steel lattice column and horizontal bracing beams on both sides of the split. The vertical steel lattice columns across the slot and the annular steel frame form an integral support structure to integrally support the horizontal bracing beams on both sides of the split, and the load borne by the annular steel frame is transmitted to the lower column foundation through the steel lattice columns. The uneven settlement of the horizontal bracing beams on both sides of the split can be greatly reduced.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A connection structure between a cross-seam steel lattice column and a bracing beam comprises a steel lattice column and two annular steel frames; the bottom of the steel lattice column stands in a concrete foundation, and the top penetrates into the horizontal bracing beams on both sides of the seam; at the connection between the horizontal bracing beam and the steel lattice column, the annular steel frame is symmetrically fixed on both sides of the steel lattice column, and the annular steel frame wraps the horizontal bracing beam therein.

[0006] Furthermore, the steel lattice columns include tie plates and angle steels. There are four angle steels in total, which are vertically distributed at the four corners to form a vertical support skeleton. The angle steels are fixed by welding tie plates to enclose a hollow square columnar structure. The tie plates are evenly arranged at a certain distance along the height direction of the angle steels. Each of the annular steel frames includes an upper channel steel tie rod, a lower channel steel bracket, a horizontal channel steel support, and a vertical channel steel support. The horizontal channel steel support is composed of an upper and a lower channel steel, and the vertical channel steel support is composed of a left , right and left two channel steels; the upper channel steel tie rod is in the shape of "eight", the open end of which is welded to the upper horizontal channel steel support, and the closed end is welded to the tie plate of the steel lattice column; the lower channel steel bracket is in the shape of an inverted "eight", the open end of which is welded to the lower horizontal channel steel support, and the closed end is welded to the tie plate of the steel lattice column, and the joint force with the upper channel steel tie rod prevents the horizontal channel steel support from a large deformation; the horizontal channel steel support and the vertical channel steel support enclose a rectangular structure to wrap the horizontal symmetrical beam.

[0007] Furthermore, each of the annular steel frames also includes a steel pad, which is placed between the contact surface of the horizontal bracing beam and the horizontal channel steel support and is welded to the horizontal channel steel support.

[0008] The steel pad transfers the load of the horizontal bracing beam to the horizontal channel steel support more evenly; the horizontal channel steel support, vertical channel steel support and steel pad together form the basic load-bearing skeleton, and are jointly loaded with the upper channel steel tie rod and the lower channel steel bracket. This structure not only enhances the rigidity of the bracing beam support system, but also improves the connection stability between it and the steel lattice column, which can greatly reduce the uneven settlement of the horizontal bracing beams on both sides of the joint.

[0009] The beneficial effects of the utility model are:

[0010] 1. Simple construction process: welding or bolt connection is adopted, with fast construction speed and easy operation.

[0011] 2. Low construction cost: The two vertical supports of steel lattice columns at the traditional joints and the pile foundation at the bottom of the support are adjusted to one to reduce project investment.

[0012] 3. Wide applicability: The connection structure of the utility model is applicable to the connection of steel lattice columns and bracing beams of various sizes and shapes, and has high versatility and practicality. At the same time, when the foundation pit support structure needs temporary seam separation, there is no need to consider additional pile foundation treatment and vertical support of steel lattice columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a plan layout diagram of an embodiment of the utility model;

[0014] Figure 2 yes Figure 1 AA section view;

[0015] Figure 3 yes Figure 1 BB cross-sectional view;

[0016] Figure 4 yes Figure 2 CC cross-sectional view.

[0017] In the figure: 1-annular steel frame; 11-upper channel steel tie rod; 12-horizontal channel steel support; 13-steel pad; 14-vertical channel steel support; 15-lower channel steel bracket; 2-steel lattice column; 21-angle steel; 22-attachment plate; 3-concrete column foundation; 4-horizontal bracing beam; 5-joint. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figures 1 to 4 As shown, the utility model provides a connection structure of a cross-seam steel lattice column and a bracing beam, comprising a steel lattice column 2 and two annular steel frames 1; the bottom of the steel lattice column 2 stands in a C30 concrete foundation, and the top penetrates into a C30F50 concrete horizontal bracing beam 4 on both sides of a joint 5; at the connection between the C30F50 concrete horizontal bracing beam 4 and the steel lattice column 2, the annular steel frame 1 is symmetrically fixed on both sides of the steel lattice column 2, and the annular steel frame 1 wraps the C30F50 concrete horizontal bracing beam 4 therein.

[0020] The steel lattice column 2 includes a 480mm×300mm×14mm gusset plate 22 and a L200mm×180mm×18mm angle steel 21. There are four angle steels 21, which are vertically distributed at the four corners to form a vertical support skeleton. The angle steels 21 are welded and fixed by gusset plates 22 to enclose a hollow square columnar structure. The gusset plates 22 are evenly arranged at a certain distance along the height direction of the angle steel 21; each annular steel frame 1 includes an upper 32#b channel steel tie rod 11, a lower 32#b channel steel bracket 15, a 32#b horizontal channel steel support 12, a 20#b vertical channel steel support 14, and a horizontal channel steel The support 12 is composed of two upper and lower channel steels, and the vertical channel steel support 14 is composed of two left and right channel steels; the upper channel steel tie rod 11 is in the shape of an "eight", and its open end is welded to the upper horizontal channel steel support 12, and the closed end is welded to the tie plate 22 of the steel lattice column 2; the lower channel steel bracket 15 is in the shape of an inverted "eight", and its open end is welded to the lower horizontal channel steel support 12, and the closed end is welded to the tie plate 22 of the steel lattice column 2, and is jointly subjected to force with the upper channel steel tie rod 11 to prevent the horizontal channel steel support 12 from undergoing large deformation; the horizontal channel steel support 12 and the vertical channel steel support 14 enclose a rectangular structure to wrap the horizontal symmetrical beam.

[0021] Each annular steel frame 1 further includes a 1 cm thick steel pad 13 , which is placed between the contact surface of the horizontal bracing beam 4 and the horizontal channel steel support 12 and welded to the horizontal channel steel support 12 .

[0022] The steel pad 13 transfers the load of the horizontal bracing beam 4 to the horizontal channel steel support 12 in a more uniform manner; the horizontal channel steel support 12, the vertical channel steel support 14 and the steel pad 13 together form a basic load-bearing framework, and are jointly loaded with the upper channel steel tie rod 11 and the lower channel steel bracket 15. This structure not only enhances the rigidity of the bracing beam support system, but also improves the connection stability between it and the steel lattice column 2, and can greatly reduce the uneven settlement of the horizontal bracing beam 4 on both sides of the joint 5.

[0023] The above-mentioned implementation modes are combined with the accompanying drawings to describe the present invention, but this should not be understood as limiting the protection scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the technical solutions obtained by equivalent replacement or equivalent transformation methods all belong to the protection scope of the present invention.

Claims

1. A connection structure between a cross-seam steel lattice column and a bracing beam, characterized in that: It includes steel lattice columns and two annular steel frames; the bottom of the steel lattice columns stands in the concrete foundation, and the top penetrates the horizontal bracing beams on both sides of the joints; at the connection between the horizontal bracing beams and the steel lattice columns, the annular steel frames are symmetrically fixed on both sides of the steel lattice columns, and the annular steel frames wrap the horizontal bracing beams therein.

2. The connection structure of the cross-seam steel lattice column and the bracing beam according to claim 1 is characterized in that: The steel lattice columns include tie plates and angle steels. There are four angle steels in total, which are vertically distributed at four corners to form a vertical support skeleton. The angle steels are fixed by welding with tie plates to enclose a hollow square columnar structure. The tie plates are evenly arranged at a certain distance along the height direction of the angle steels; each of the annular steel frames includes an upper channel steel tie rod, a lower channel steel bracket, a horizontal channel steel support, and a vertical channel steel support. The horizontal channel steel support is composed of an upper and a lower channel steel, and the vertical channel steel support is composed of a left and a right channel steel; the upper channel steel tie rod is in an "eight" shape, and its open end is welded to the upper horizontal channel steel support, and the closed end is welded to the tie plate of the steel lattice column; the lower channel steel bracket is in an inverted "eight" shape, and its open end is welded to the lower horizontal channel steel support, and the closed end is welded to the tie plate of the steel lattice column. The horizontal channel steel support and the vertical channel steel support enclose a rectangular structure to wrap the horizontal symmetrical beam.

3. The connection structure of the cross-seam steel lattice column and the bracing beam according to claim 2 is characterized in that: Each of the annular steel frames also includes a steel pad, which is placed between the contact surface of the horizontal bracing beam and the horizontal channel steel support and is welded to the horizontal channel steel support.

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