CN110761299A - Bracket for mounting steel support on foundation pit purlin and construction method thereof - Google Patents
Bracket for mounting steel support on foundation pit purlin and construction method thereof Download PDFInfo
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- CN110761299A CN110761299A CN201911078756.7A CN201911078756A CN110761299A CN 110761299 A CN110761299 A CN 110761299A CN 201911078756 A CN201911078756 A CN 201911078756A CN 110761299 A CN110761299 A CN 110761299A
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- foundation pit
- steel support
- purlin
- force transmission
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a bracket for mounting a steel support on a foundation pit purlin and a construction method thereof, wherein the bracket comprises: the adjusting frame is detachably fixed on the foundation pit purlin and comprises a force transmission plate which is arranged opposite to the foundation pit purlin and an included angle between the force transmission plate and the vertical surface is adjustable, and the force transmission plate is parallel to the end face of the steel support by adjusting the included angle; the support frame that supplies to connect the steel shotcrete terminal surface is fixed in the biography power board to mode adjustable of altitude mixture control is through the height of adjusting the support frame to corresponding to the steel shotcrete terminal surface, makes steel shotcrete terminal surface and support frame hug closely. According to the invention, the height of the support frame is adjusted to correspond to the steel support, and the force transmission plate is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support and the support frame are tightly attached to each other when the steel support is installed, the problem of large axial force loss and poor stability of a support system caused by the condition of eccentric stress in the process of applying the axial force of the steel support is avoided, and the effect of foundation pit support is avoided being influenced.
Description
Technical Field
The invention relates to the field of building construction, in particular to a bracket for mounting a steel support on a foundation pit purlin and a construction method thereof.
Background
The combined steel support technology is characterized in that steel enclosing purlins are arranged on the side wall of a foundation pit in a layered mode after the foundation pit is excavated, and the enclosing purlins are of an annular structure. And welding support brackets on the enclosing purlin, then laying steel supports between the two brackets according to the designed spacing of the supports and applying axial force of the steel supports, so that the foundation pit is subjected to prestress of a supporting structure, and the purpose of enhancing the stability of the foundation pit is achieved.
Traditional bracket only is two steel sheets, can not adjust promptly after on-the-spot welded fastening and welding, often in the steel shotcrete construction because of the construction laying-out error, the positional deviation that on-the-spot welding installation process produced causes steel shotcrete installation back both ends elevation inconsistent, support axis and steel enclose purlin out of plumb to cause the unable and bracket panel of support terminal surface to paste closely, the axial force is applyed the in-process and is had the condition of eccentric atress, and the axial force loss is great, support system poor stability. These will directly affect the effectiveness of the foundation pit support.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a bracket for mounting a steel support on a foundation pit purlin and a construction method thereof, and solves the problem that the bracket cannot be adjusted after being welded in the prior art.
The technical scheme for realizing the purpose is as follows:
the invention provides a bracket for mounting a steel support on a foundation pit purlin, which comprises:
the adjusting frame is detachably fixed on the foundation pit purlin and comprises a force transmission plate which is arranged opposite to the foundation pit purlin and an included angle between the force transmission plate and a vertical surface is adjustable, and the force transmission plate is parallel to the end face of the steel support by adjusting the included angle; and
the supporting frame is used for being connected with the steel supporting end face and is fixed on the force transmission plate in a height adjusting and adjusting mode, and the height of the supporting frame is adjusted to correspond to the steel supporting end face, so that the steel supporting end face is closely attached to the supporting frame.
The invention further improves the bracket for mounting the steel support on the foundation pit purlin, wherein the adjusting frame comprises:
the stress plate is arranged opposite to the force transmission plate, and the stress plate is detachably attached and fixed to the foundation pit purlin;
the other end of the supporting rod is hinged with the force transmission plate; and
the length-adjustable telescopic rod is characterized in that two ends of the telescopic rod are correspondingly hinged to the stress plate and the dowel plate, and the length of the telescopic rod is adjusted to adjust the dowel plate to be parallel to the steel support end face.
The bracket for mounting the steel support on the foundation pit purlin is further improved in that the telescopic rod comprises:
a sleeve provided with an internal thread;
the first screw rod and the second screw rod are respectively screwed at two ends of the sleeve, the first screw rod is hinged to the stress plate, and the second screw rod is hinged to the dowel plate; and
the first nut is screwed on the first screw rod, the second nut is screwed on the second screw rod, the first nut and the second nut are located at two opposite ends of the sleeve, and the length of the telescopic rod is adjusted by rotating the sleeve.
The bracket for mounting the steel support on the foundation pit purlin is further improved,
a plurality of through holes are formed in the force transmission plate at intervals in the vertical direction;
the support frame passes through bolted connection in dowel plate, through with the bolt wears to locate the through-hole that corresponds to the steel shotcrete height with the rigid coupling is realized to the support frame.
The invention also provides a construction method of the bracket for mounting the steel support on the foundation pit purlin, which comprises the following steps:
providing an adjusting frame, and detachably fixing the adjusting frame to the foundation pit purlin, wherein the adjusting frame comprises a force transmission plate which is arranged opposite to the foundation pit purlin and has an adjustable included angle with a vertical surface;
providing a support frame for connecting the end face of the steel support, and fixing the support frame to the dowel plate in a height-adjustable mode; and
before the steel support is fixed on the foundation pit purlin, the height of the support frame is adjusted to be corresponding to the end face of the steel support, and the force transmission plate is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support is closely attached to the support frame.
The construction method of the bracket for mounting the steel support on the foundation pit purlin is further improved in that the adjusting frame comprises the following steps:
providing a stress plate, arranging the stress plate and the force transmission plate oppositely, and detachably attaching and fixing the stress plate to the foundation pit purlin;
providing at least one supporting rod, vertically fixing the supporting rod on the stress plate, and hinging the other end of the supporting rod to the force transmission plate; and
providing a telescopic rod with adjustable length, and correspondingly hinging two ends of the telescopic rod to the stress plate and the force transmission plate;
the length of the telescopic rod is adjusted to adjust the dowel plate to be parallel to the steel support end face.
The construction method of the bracket for mounting the steel support on the foundation pit purlin is further improved in that the telescopic rod comprises the following steps:
providing a sleeve with internal threads;
providing a first screw and a second screw, respectively screwing the first screw and the second screw at two ends of the sleeve, hinging the first screw to the stress plate, and hinging the second screw to the force transmission plate; and
providing a first nut and a second nut, screwing the first nut to the first screw rod, and screwing the second nut to the second screw rod, wherein the first nut and the second nut are positioned at two opposite ends of the sleeve;
the sleeve is adjusted in a rotating mode, and the length of the telescopic rod is adjusted.
The construction method of the bracket for mounting the steel support on the foundation pit purlin is further improved in that the method further comprises the following steps:
a plurality of through holes are formed in the force transmission plate at intervals in the vertical direction;
and providing a bolt, connecting the support frame to the force transmission plate through the bolt, and fixedly connecting the bolt with the support frame through a through hole corresponding to the height of the steel support in a penetrating manner.
The bracket for mounting the steel support on the foundation pit purlin and the construction method thereof have the beneficial effects that:
the steel support is transversely supported on the foundation pit purlin by the bracket. The height of the supporting frame is adjusted to correspond to the steel support, and the force transmission plate is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support and the supporting frame are tightly attached to each other when the steel support is installed, the position is stable, the problem that the stability of a large supporting system with the axial force loss caused by the eccentric stress in the axial force applying process of the steel support is poor is solved, and the effect of foundation pit supporting is prevented from being influenced.
Drawings
Fig. 1 is a side view of a bracket for mounting a steel support to a foundation pit purlin according to the present invention.
Fig. 2 is a cross-sectional view a-a of fig. 1.
Fig. 3 is a schematic view of the telescoping rod of fig. 2 after adjustment.
Fig. 4 is a sectional view of B-B of fig. 1.
Fig. 5 is a cross-sectional view of C-C of fig. 1.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, a side view of the bracket for mounting the steel support of the present invention to the purlin of a foundation pit is shown. Fig. 2 is a cross-sectional view a-a of fig. 1. Fig. 3 is a schematic view of the telescoping rod of fig. 2 after adjustment. Referring to fig. 1 to 3, the bracket for mounting the steel support to the purlin of the foundation pit according to the present invention includes:
the adjusting frame 20 is detachably fixed on the foundation pit purlin 10, the adjusting frame 20 comprises a force transmission plate 21 which is arranged opposite to the foundation pit purlin 10 and has an adjustable included angle with a vertical surface, and the force transmission plate 21 is parallel to the end face of the steel support by adjusting the included angle; and
the support frame 30 for connecting the steel support end face is fixed on the dowel plate 21 in a height adjusting and adjusting mode, and the steel support end face is attached to the support frame 30 in a close fit manner by adjusting the height of the support frame 30 to be corresponding to the steel support end face.
In this embodiment, set up foundation ditch purlin 10 at the foundation ditch lateral wall layering after the foundation ditch excavation, foundation ditch purlin 10 is the enclosed structure of ring. The foundation pit surrounding purlin 10 is correspondingly fixed on a primary supporting structure 11 of the foundation pit. The steel support is transversely supported on the foundation pit purlin 10 through the bracket. The height of the supporting frame is adjusted to correspond to that of the steel support, and the force transmission plate is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support is closely attached to the supporting frame when the steel support is installed. The bracket avoids the gap between the end face of the steel support and the support frame, avoids the problem of large axial force loss and poor stability of the support system caused by the eccentric stress in the axial force application process of the steel support, and avoids influencing the effect of foundation pit support.
As a preferred embodiment of the bracket for mounting the steel support on the foundation pit purlin according to the present invention, as shown in fig. 1 to 3, the adjusting bracket 20 includes:
the stress plate 22 is arranged opposite to the force transmission plate 31, and the stress plate 22 is detachably attached and fixed to the foundation pit purlin 10;
at least one supporting rod 23 vertically fixed on the stress plate 22, and the other end of the supporting rod 23 is hinged with the force transmission plate 21; and
the length-adjustable telescopic rod 24 is characterized in that two ends of the telescopic rod 24 are correspondingly hinged to the stress plate 22 and the force transmission plate 21, and the force transmission plate 21 is adjusted to be parallel to the end face of the steel support by adjusting the length of the telescopic rod 24.
In the present embodiment, the strut 23 has a constant length. The other end of the strut 23 is hinged to the force transfer plate 21 so that the distance between the force transfer plate 31 and the force receiving plate 22 at the position corresponding to the strut 23 is constant.
As shown in fig. 3, when the length of the telescopic rod 24 is increased, the distance between the position of the force transmission plate 21 corresponding to the telescopic rod 24 and the force bearing plate 22 is increased, the hinge position of the telescopic rod 24 rotates adaptively, and the force transmission plate 21 tilts. The end face of the steel support to be installed is parallel to the end face of the steel support to be installed, so that the force transmission plate 21 and the steel support to be installed can be closely attached and connected, and the situation that the position of a gap is unstable is prevented.
As a preferred embodiment of the bracket for mounting the steel support on the foundation pit purlin according to the present invention, as shown in fig. 1 to 3, the telescopic rod 24 includes:
a sleeve 240 provided with an internal thread;
a first screw 241 and a second screw 242 respectively screwed at two ends of the sleeve 240, the first screw 241 being hinged to the force-bearing plate 22, the second screw 242 being hinged to the force-transmitting plate 21; and
the first nut screwed on the first screw 241 and the second nut screwed on the second screw 242 are located at two opposite ends of the sleeve 240, and the length of the telescopic rod 24 can be adjusted by rotating the adjusting sleeve 240. The first and second nuts and the sleeve 240 have large frictional resistance, so that the contraction tendency of the telescopic rod 24 can be suppressed. The length of the telescopic rod 24 is ensured to be unchanged after adjustment,
as a preferred embodiment of the bracket for mounting the steel support on the foundation pit purlin, the bracket for mounting the steel support on the foundation pit purlin is shown in fig. 4, which is a sectional view of B-B of fig. 1. As shown in fig. 1 to 4, the stress plate 22 has a plurality of fixing holes formed around its periphery. The stress plate 22 and the foundation pit purlin 10 are fixedly connected through the fixing bolts 40, and the mounting and the dismounting are convenient.
In the present embodiment, the force receiving plate 22 and the force transmitting plate 21 are both rectangular. The two supporting rods 23 are transversely and vertically fixed on the vertical stress plate and are positioned in the same row. The telescopic rod 24 is provided with one, is arranged on one side of the stress plate opposite to the supporting rod and corresponds to the space between the two supporting rods.
As a preferred embodiment of the bracket for mounting the steel support on the foundation pit purlin, the bracket for mounting the steel support on the foundation pit purlin is shown in fig. 5, which is a cross-sectional view of C-C in fig. 1. As shown in connection with figures 1 to 5,
the force transmission plate 21 is provided with a plurality of through holes 210 at intervals in the vertical direction;
the support frame 30 is connected to the dowel plate 21 by bolts, and the bolts are fixedly connected to the support frame 30 by passing through holes corresponding to the height of the steel support.
The plurality of through holes 210 correspond to different heights, respectively, and the through holes 210 having the corresponding heights are selected to correspond the support frame 30 and the steel support height to each other to satisfy the installation requirements.
The invention also provides a construction method of the bracket for mounting the steel support on the foundation pit purlin, which comprises the following steps:
providing an adjusting frame 20, and detachably fixing the adjusting frame 20 on the foundation pit purlin 10, wherein the adjusting frame 20 comprises a force transmission plate 21 which is arranged opposite to the foundation pit purlin 10 and has an adjustable included angle with a vertical surface;
providing a support frame 30 for connecting the end face of the steel support, and fixing the support frame 30 to the dowel plate 21 in a height-adjustable manner; and
before the steel support is fixed on the foundation pit purlin 10, the height of the support frame 30 is adjusted to be corresponding to the end face of the steel support, and the force transmission plate 21 is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support is closely attached to the support frame 30.
As a preferred embodiment of the construction method of the bracket for mounting the steel support on the foundation pit purlin of the present invention, the adjusting bracket 20 includes:
providing a stress plate 22, arranging the stress plate 22 opposite to the force transmission plate 21, and detachably attaching and fixing the stress plate 22 to the foundation pit purlin 10;
providing at least one supporting rod 23, vertically fixing the supporting rod 23 on the stress plate 22, and hinging the other end of the supporting rod 23 with the force transmission plate 21; and
providing a telescopic rod 24 with adjustable length, and correspondingly hinging two ends of the telescopic rod 24 to the stress plate 22 and the force transmission plate 21;
the length of the telescopic rod 24 is adjusted to adjust the force transmission plate 21 to be parallel to the end face of the steel support.
As a preferred embodiment of the construction method of the bracket for mounting the steel support on the foundation pit purlin of the present invention, providing the telescopic rod 24 comprises:
providing a sleeve 240 with internal threads therein;
providing a first screw 241 and a second screw 242, screwing the first screw 241 and the second screw 242 at two ends of the sleeve 240 respectively, hinging the first screw 241 to the stress plate 22, and hinging the second screw 242 to the force transmission plate 21; and
providing a first nut and a second nut, screwing the first nut to the first screw 241, screwing the second nut to the second screw 242, wherein the first nut and the second nut are positioned at two opposite ends of the sleeve 240;
the length of the telescopic rod 24 is adjusted by rotating the adjusting sleeve 240.
As a preferred embodiment of the construction method of the bracket for mounting the steel support on the foundation pit purlin, the invention further comprises:
a plurality of through holes are formed in the force transmission plate 21 at intervals in the vertical direction;
and providing bolts, connecting the support frame 30 to the force transmission plate 21 through the bolts, and fixedly connecting the support frame 30 with the bolts through the through holes 210 corresponding to the height of the steel support.
In this embodiment, a pair of brackets is used to secure the two ends of the steel support to the corresponding purlin. The single-side adjustable bracket and the single-side fixed bracket can be adopted on the site and can be determined according to the specific situation on the site.
The field operation mode is as follows:
and symmetrically placing the two brackets on the enclosing purlin according to the measurement lofting position, and fixedly connecting the two brackets with the enclosing purlin by bolts. And measuring the elevation of the lofting bracket, and selecting a through hole suitable for the dowel plate to fix the height of the support frame.
And hoisting the steel supports to the positions near the bracket and the surrounding purlin, and ensuring that the elevation deviation of the brackets at the two ends of the steel supports is within the standard allowable range. The sleeve is adjusted according to requirements, so that the force transmission plate of the bracket is parallel to the end face of the steel support. The first nut and the second nut at the two ends of the sleeve are screwed down to fix the length of the telescopic rod. And adjusting the steel supports to ensure that two end faces of the steel supports are respectively attached to the force transmission plates of the corresponding brackets, applying a designed axial force after the steel supports are installed, and finishing the construction of the single steel support.
The bracket for mounting the steel support on the foundation pit purlin and the construction method thereof have the beneficial effects that:
the steel support is transversely supported on the foundation pit purlin by the bracket. The height of the supporting frame is adjusted to correspond to the steel support, and the force transmission plate is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support and the supporting frame are tightly attached to each other when the steel support is installed, the position is stable, the problem that the stability of a large supporting system with the axial force loss caused by the eccentric stress in the axial force applying process of the steel support is poor is solved, and the effect of foundation pit supporting is prevented from being influenced.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (8)
1. The utility model provides a bracket that steel shotcrete was installed and is used in foundation ditch purlin which characterized in that includes:
the adjusting frame is detachably fixed on the foundation pit purlin and comprises a force transmission plate which is arranged opposite to the foundation pit purlin and an included angle between the force transmission plate and a vertical surface is adjustable, and the force transmission plate is parallel to the end face of the steel support by adjusting the included angle; and
the supporting frame is used for being connected with the steel supporting end face and is fixed on the force transmission plate in a height adjusting and adjusting mode, and the height of the supporting frame is adjusted to correspond to the steel supporting end face, so that the steel supporting end face is closely attached to the supporting frame.
2. The bracket for mounting the steel support to the purlin of the foundation pit as claimed in claim 1, wherein the adjusting bracket comprises:
the stress plate is arranged opposite to the force transmission plate, and the stress plate is detachably attached and fixed to the foundation pit purlin;
the other end of the supporting rod is hinged with the force transmission plate; and
the length-adjustable telescopic rod is characterized in that two ends of the telescopic rod are correspondingly hinged to the stress plate and the dowel plate, and the length of the telescopic rod is adjusted to adjust the dowel plate to be parallel to the steel support end face.
3. The bracket for mounting the steel support to the purlin of the foundation pit as claimed in claim 2, wherein the telescopic rod comprises:
a sleeve provided with an internal thread;
the first screw rod and the second screw rod are respectively screwed at two ends of the sleeve, the first screw rod is hinged to the stress plate, and the second screw rod is hinged to the dowel plate; and
the first nut is screwed on the first screw rod, the second nut is screwed on the second screw rod, the first nut and the second nut are located at two opposite ends of the sleeve, and the length of the telescopic rod is adjusted by rotating the sleeve.
4. The bracket for mounting the steel support to the purlin of a foundation pit as claimed in claim 1,
a plurality of through holes are formed in the force transmission plate at intervals in the vertical direction;
the support frame passes through bolted connection in dowel plate, through with the bolt wears to locate the through-hole that corresponds to the steel shotcrete height with the rigid coupling is realized to the support frame.
5. A construction method of a bracket for mounting a steel support on a foundation pit purlin is characterized by comprising the following steps:
providing an adjusting frame, and detachably fixing the adjusting frame to the foundation pit purlin, wherein the adjusting frame comprises a force transmission plate which is arranged opposite to the foundation pit purlin and has an adjustable included angle with a vertical surface;
providing a support frame for connecting the end face of the steel support, and fixing the support frame to the dowel plate in a height-adjustable mode; and
before the steel support is fixed on the foundation pit purlin, the height of the support frame is adjusted to be corresponding to the end face of the steel support, and the force transmission plate is adjusted to be parallel to the end face of the steel support, so that the end face of the steel support is closely attached to the support frame.
6. The method of constructing a bracket for mounting a steel support to a purlin of a foundation pit according to claim 5, wherein the providing of the adjustment bracket comprises:
providing a stress plate, arranging the stress plate and the force transmission plate oppositely, and detachably attaching and fixing the stress plate to the foundation pit purlin;
providing at least one supporting rod, vertically fixing the supporting rod on the stress plate, and hinging the other end of the supporting rod to the force transmission plate; and
providing a telescopic rod with adjustable length, and correspondingly hinging two ends of the telescopic rod to the stress plate and the force transmission plate;
the length of the telescopic rod is adjusted to adjust the dowel plate to be parallel to the steel support end face.
7. The method of constructing a bracket for mounting a steel support to a purlin of a foundation pit according to claim 6, wherein providing the telescopic rod comprises:
providing a sleeve with internal threads;
providing a first screw and a second screw, respectively screwing the first screw and the second screw at two ends of the sleeve, hinging the first screw to the stress plate, and hinging the second screw to the force transmission plate; and
providing a first nut and a second nut, screwing the first nut to the first screw rod, and screwing the second nut to the second screw rod, wherein the first nut and the second nut are positioned at two opposite ends of the sleeve;
the sleeve is adjusted in a rotating mode, and the length of the telescopic rod is adjusted.
8. The method for constructing a bracket for mounting a steel support to a purlin around a foundation pit as claimed in claim 5, further comprising:
a plurality of through holes are formed in the force transmission plate at intervals in the vertical direction;
and providing a bolt, connecting the support frame to the force transmission plate through the bolt, and fixedly connecting the bolt with the support frame through a through hole corresponding to the height of the steel support in a penetrating manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078756.7A CN110761299B (en) | 2019-11-07 | 2019-11-07 | Bracket for mounting steel support on foundation pit purlin and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078756.7A CN110761299B (en) | 2019-11-07 | 2019-11-07 | Bracket for mounting steel support on foundation pit purlin and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110761299A true CN110761299A (en) | 2020-02-07 |
| CN110761299B CN110761299B (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911078756.7A Active CN110761299B (en) | 2019-11-07 | 2019-11-07 | Bracket for mounting steel support on foundation pit purlin and construction method thereof |
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| CN (1) | CN110761299B (en) |
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| CN111636433A (en) * | 2020-05-14 | 2020-09-08 | 广州一建建设集团有限公司 | Adjustable die for manufacturing waist beam and using method thereof |
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| KR20060089271A (en) * | 2005-02-03 | 2006-08-09 | (주)청석엔지니어링 | Establishment structure of strut for retaining walls |
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| CN111636433A (en) * | 2020-05-14 | 2020-09-08 | 广州一建建设集团有限公司 | Adjustable die for manufacturing waist beam and using method thereof |
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| Publication number | Publication date |
|---|---|
| CN110761299B (en) | 2021-02-12 |
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