CN210151752U - A kind of foundation pit steel roof support - Google Patents

Abstract

The utility model discloses a foundation ditch steel shore, it encloses the purlin including supporting steel pipe, fixing bolt and two steels, all installs the bracket on envelope's the double-phase offside, and two steels enclose the purlin and install respectively on the bracket of both sides, the steel encloses and is equipped with a plurality of location screws on the purlin, fixing bolt runs through the location screw and inserts and fix in the envelope, the both ends of supporting the steel pipe enclose the purlin with two steels respectively and meet. The utility model discloses a enclose the purlin with the steel and place on the bracket to enclose purlin and envelope with the fixing bolt connection steel, make the steel enclose the purlin not only can bear the pressure that comes from envelope, can also bear the pulling force, holistic steel bearing structure is more stable. Use the utility model discloses can the reduction of erection time, and because steel member reuse, therefore reduce construction cost.

Description

A kind of foundation pit steel roof support

technical field

The utility model relates to a steel roof brace in the field of foundation pit engineering, in particular to a foundation pit steel roof brace.

Background technique

The foundation pit support system includes reinforced concrete support and steel structure support. At present, in the construction of deep foundation pit engineering, in order to prevent the instability of foundation pit such as kicking damage, the top support in deep foundation pit engineering usually adopts reinforced concrete support that can bear both pressure and tension. However, the construction period of reinforced concrete braces is long, the dismantling is difficult, the materials cannot be reused, and the cost is high. Compared with reinforced concrete bracing, steel structure support has the advantages of convenient installation and dismantling, fast construction speed, and can be reused. However, the existing steel structure support can only bear the pressure and cannot bear the tension. Therefore, there is a need for a system that can simultaneously Steel structural support for compressive and tensile forces.

Utility model content

The purpose of the utility model is to provide a foundation pit steel top support, which can bear both pressure and tension.

The solution of the utility model to solve the technical problem is as follows: a steel top support for a foundation pit, which comprises a supporting steel pipe, a fixing bolt and two steel purlins. Corbels are installed on two opposite sides of the surrounding structure, and two steel purlins are installed. The steel enclosure purlins are respectively installed on the corbels on both sides. The steel enclosure purlins are provided with a plurality of positioning screw holes. The fixing bolts penetrate the positioning screw holes and are inserted into the enclosure structure to be fixed. The two ends of the supporting steel pipe They are connected with two steel purlins respectively.

As a further improvement of the above technical solution, the enclosure structure includes steel sheet piles, the steel sheet piles are provided with a plurality of first through holes, the outer sides of the steel sheet piles are provided with positioning channels, and the positioning channels are provided with multiple a second through hole, the fixing bolt penetrates the positioning screw hole, the first through hole and the second through hole in sequence, and a nut is fixedly connected to the end of the fixing bolt.

As a further improvement of the above technical solution, a plurality of the positioning screw holes are evenly arranged in two rows, and the two rows of positioning screw holes are respectively located at the upper and lower parts of the steel purlin.

As a further improvement of the above technical solution, a concrete block is provided between the outer side of the steel sheet pile and the positioning channel steel.

As a further improvement of the above technical solution, one end of the supporting steel pipe is connected to the steel purlin through a fixed end, and the other end of the supporting steel pipe is connected to the steel purlin through a flexible end, and the movable end is connected by a limit connection The piece is connected to the steel purlin.

As a further improvement of the above technical solution, the limit connector includes two pins, an outer tube arranged on the end face of the flexible end, and two inner tubes both arranged on the inner side of the steel purlin, and the two inner tubes are inserted into the outer In the pipe, the side walls of the two inner pipes are provided with first pin holes, the side walls of the outer pipes are provided with two second pin holes, and the pins pass through the first pin holes and the second pin holes.

As a further improvement of the above technical solution, it also includes a jack located between the two inner tubes, the bottom of the jack is fixed on the inner side of the steel purlin, and the top of the jack is connected to the end face of the flexible end.

As a further improvement of the above technical solution, it also includes two bolt protectors, one end of the bolt protector is fixed on the steel purlin, the other end of the bolt protector is in contact with the outer wall of the outer tube, and the bolt protector are perpendicular to the axial direction of the pin.

As a further improvement of the above technical solution, it also includes a hanging bar, one end of the hanging bar is fixed on the enclosure structure, and the other end of the hanging bar is connected with the upper part of the steel purlin.

The beneficial effects of the utility model are: the utility model places the steel purlin on the corbel and connects the steel purlin and the enclosure structure with fixing bolts, so that the steel purlin can not only bear the pressure from the enclosure structure, but also can Bearing tensile force, the overall steel support structure is more stable. The use of the utility model can shorten the construction period, and because the steel components can be reused, the construction cost is reduced.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings that are used in the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, but not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings according to these drawings without creative work.

1 is a front view of an embodiment of the present utility model;

2 is a front view of another embodiment of the present invention;

FIG. 3 is a top view of another embodiment of the present invention.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, those skilled in the art can obtain other embodiments without creative work, All belong to the scope of protection of the present invention. In addition, all the coupling/connection relationships mentioned in the text do not mean that the components are directly connected, but refer to a better coupling structure by adding or reducing coupling accessories according to specific implementation conditions.

Referring to Figure 1, a foundation pit steel top support, which includes a supporting steel pipe 1, a fixing bolt 2 and two steel purlins 3, two opposite sides of the enclosure structure are installed with corbels 4, two steel purlins 3 They are respectively installed on the corbels 4 on both sides. The steel purlin 3 is provided with a plurality of positioning screw holes. The ends are respectively connected with the two steel purlins 3. When the enclosure structure is a construction method pile, the corbel 4 is directly welded or installed on the inner side of the construction method pile through expansion bolts. The steel purlin 3 is placed on the corbel 4, and the steel purlin 3 is close to the inner side of the construction method pile. The positioning bolt holes are arranged in two rows. The positioning screw holes in the row are equally spaced. The fixing bolts 2 are inserted into the positioning screw holes and inserted into the construction method piles for fixing, so that the steel purlins 3 are tightly connected with the enclosure structure. Preferably, the insertion length of the fixing bolt 2 is greater than the radius of the construction method pile.

As another embodiment, referring to FIGS. 2 to 3 , the enclosure structure includes a steel sheet pile 6 . The steel sheet pile 6 is provided with a plurality of first through holes, and the outer side of the steel sheet pile 6 is provided with a positioning channel steel 5 . The positioning channel steel 5 is provided with a plurality of second through holes, the fixing bolts 2 pass through the positioning screw holes, the first through holes and the second through holes in sequence, and the ends of the fixing bolts 2 are fixed with nuts. A concrete block 7 is provided between the outer side of the steel sheet pile 6 and the positioning channel steel 5 . When the enclosure structure is a steel sheet pile structure, the steel enclosure purlin 3 is fixed to the steel sheet pile 6 by the fixing bolts 2 , and the screw rod of the fixing bolt 2 is fixed between the positioning channel steel 5 and the steel enclosure purlin 3 . Preferably, the center line of the positioning channel steel 5 in the horizontal direction should coincide with the center line of the steel purlin 3 in the horizontal direction. At the same time, in order to improve the stability and tensile performance of the fixing bolts 2, after the fixing bolts 2 are installed, fast-hardening fine stone concrete is filled between the steel sheet pile 6 and the positioning steel groove 5 to further fix the fixing bolts 2. . In addition, in order to fasten the connection between the steel sheet piles 6 and the steel purlins 3 , fast-hardening fine stone concrete can also be filled between the steel sheet piles 6 and the steel purlins 3 .

As a further preferred embodiment, a plurality of the positioning screw holes are arranged in two rows, and the two rows of positioning screw holes are located at the upper and lower parts of the steel purlin 3 respectively. Multiple positioning screw holes in the same row are arranged at equal intervals, and two positioning channel steels 5 can be installed on the steel sheet pile 6 to correspond to the positioning screw holes located at the upper part of the steel purlin 3 and the positioning screw located at the lower part of the steel purlin 3 respectively. hole.

Further as a preferred embodiment, one end of the supporting steel pipe 1 is connected to the steel purlin 3 through a fixed end, and the other end of the supporting steel pipe 1 is connected to the steel purlin 3 through a flexible end, and the flexible end is The limit connector is connected with the steel purlin 3. The limiting connector includes two pins 8, an outer tube arranged on the end face of the active end, and two inner tubes both arranged on the inner side of the steel purlin 3. The two inner tubes are inserted into the outer tube, and the two inner tubes are inserted into the outer tube. The side walls of the tube are provided with first pin holes, the side walls of the outer tube are provided with two second pin holes, and the pins 8 pass through the first pin holes and the second pin holes. After inserting the pin 8 into the first pin hole and the second pin hole, in order to ensure the connection strength between the steel purlin 3 and the flexible end, a steel bar is used to insert the first pin hole and the second pin hole. Pack tightly around.

Further as a preferred embodiment, it also includes a jack 9 located between the two inner tubes, the bottom of the jack 9 is fixed on the inner side of the steel purlin 3, and the top of the jack 9 is in contact with the end face of the flexible end. After the supporting steel pipe 1 is installed, the jack 9 is used to apply prestressing force, so as to form an overall stable enclosure support system. After the prestress is in place, fix the flexible end and weld it firmly.

Further as a preferred embodiment, it also includes two bolt protectors 10, one end of the bolt protector 10 is fixed on the steel purlin 3, the other end of the bolt protector 10 is in contact with the outer wall of the outer tube, the The plug protectors 10 are all perpendicular to the axial direction of the plug 8 .

As a further preferred embodiment, it also includes a hanging bar 11 , one end of the hanging bar 11 is fixed on the enclosure structure, and the other end of the hanging bar 11 is connected to the upper part of the steel purlin 3 . The hanging bars 11 exert tensile force on the steel purlin 3, thereby reducing the pressure on the corbel 4, and the steel purlin 3 is more stable and reliable.

Taking the enclosure structure as the steel sheet pile 6 structure as an example, the installation steps of the present utility model are described:

(1) Excavate a trench on the outside of the foundation pit and install the steel sheet pile 6, and install the positioning channel steel 5 to the outside of the steel sheet pile 6;

(2) Install corbel 4, steel purlin 3 and hanging bar 11;

(3) Install the fixing bolts 2, and tightly fill the fast-hardening fine stone concrete between the positioning channel steel 5 and the steel sheet pile 6;

(4) Temporarily fix the steel support, and apply prestress through the jack 9;

(5) Install the latch 8 and the latch protector 10 .

The preferred embodiments of the present utility model have been described above in detail, but the invention is not limited to the embodiments, and those skilled in the art can also make various equivalent modifications without departing from the spirit of the present utility model. Or alternatives, these equivalent modifications or alternatives are included within the scope defined by the claims of the present application.

Claims (9)

1. a foundation pit steel top brace, is characterized in that: comprise supporting steel pipe (1), fixing bolt (2) and two steel purlins (3), on both opposite sides of the enclosure structure, corbels ( 4), two steel purlins (3) are respectively installed on the corbels (4) on both sides, the steel purlins (3) are provided with a plurality of positioning screw holes, and the fixing bolts (2) pass through the positioning The two ends of the supporting steel pipe (1) are respectively connected with the two steel purlins (3). 2 . The foundation pit steel roof support according to claim 1 , wherein the enclosure structure comprises a steel sheet pile ( 6 ), the steel sheet pile ( 6 ) is provided with a plurality of first through holes, and the steel sheet pile ( 6 ) is provided with a plurality of first through holes. The outer side of (6) is provided with a positioning channel steel (5), the positioning channel steel (5) is provided with a plurality of second through holes, and the fixing bolts (2) sequentially pass through the positioning screw holes, the first through holes and the In the second through hole, a nut is fixedly connected to the end of the fixing bolt (2). 3. The steel top support for foundation pit according to claim 2, characterized in that: a plurality of said positioning screw holes are equally divided into two rows and arranged, and the two rows of positioning screw holes are respectively located at the upper and lower parts of the steel purlin (3) . 4. The foundation pit steel top support according to claim 2, characterized in that: a concrete block (7) is arranged between the outer side of the steel sheet pile (6) and the positioning channel steel. 5. The foundation pit steel top support according to claim 1, characterized in that: one end of the supporting steel pipe (1) is connected to the steel purlin (3) through a fixed end, and the other end of the supporting steel pipe (1) is connected to the steel purlin (3). One end is connected with the steel purlin (3) through a flexible end, and the movable end is connected with the steel purlin (3) through a limit connecting piece. 6. The foundation pit steel top support according to claim 5, characterized in that: the limit connecting piece comprises two pins (8), an outer pipe arranged on the end face of the movable end, and two bolts both arranged on the steel The inner pipe on the inner side of the purlin (3), the two inner pipes are inserted into the outer pipe, the side walls of the two inner pipes are provided with first pin holes, and the side walls of the outer pipe are provided with two second pin holes. A pin hole, the plug (8) penetrates the first pin hole and the second pin hole. 7. The foundation pit steel top support according to claim 6, characterized in that: it also comprises a jack (9) positioned between two inner pipes, and the bottom of the jack (9) is fixed on the steel purlin (3) Inside, the top of the jack (9) is in contact with the end face of the flexible end. 8. The foundation pit steel top support according to claim 6, characterized in that: further comprising two bolt protectors (10), one end of the bolt protectors (10) being fixed on the steel purlin (3), The other end of the plug protector (10) abuts against the outer wall of the outer tube, and the plug protectors (10) are all perpendicular to the axial direction of the plug (8). 9. The foundation pit steel roof support according to claim 1, characterized in that: it further comprises a hanging bar (11), one end of the hanging bar (11) is fixed on the enclosure structure, and the hanging bar (11) The other end is connected with the upper part of the steel purlin (3).

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