Assembly type foundation pit mortise and tenon connection supporting beam section convenient to disassemble

Abstract

The utility model discloses an assembly type foundation pit tenon-and-mortise connection supporting beam section convenient to disassemble, which is formed by seamless riveting of a standard T-shaped beam piece, a short T-shaped beam piece and a U-shaped beam piece which are made of prefabricated reinforced concrete and splicing of connecting steel plates and screws which are arranged at butt joints. The device is prefabricated in a factory and transported to a foundation pit site to be hoisted and assembled; the device can be connected with a steel structure auxiliary support to form a stable and reliable foundation pit inner support system; the beam piece provided by the utility model is lighter, the construction speed of a support in a foundation pit can be obviously accelerated, the beam piece is convenient to dismantle and integrally recycle, the cost can be obviously reduced by repeated recycling, and the beam piece has good economic benefits and environmental benefits.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fabricated building, and concretely relates to a fabricated foundation pit mortise and tenon joint supporting beam section convenient to install and demolish. BACKGROUND

[0002] Most of the foundation pit support forms needing to be supported adopt anchor cables, cast-in-place concrete inner supports, steel supports and the like. Although the support system has been mature, there are still limitations in use and inconvenience in construction and the like. Main problems are: ①In some areas, anchor cables cannot be out of the red line or there are factors such as pipe networks and buildings existing around the foundation pit, so that the use of anchor cable support has great limitations; ②The construction period of cast-in-place concrete support is long, and the concrete curing period needs to reach the design use requirement before continuing to construct, in addition, the cast-in-place concrete support is difficult to demolish, and the recycled use value of the reinforced concrete after demolition is low; ③Although steel support can be reused, and the construction period is short, the material price is high, and when the deformation needs to be controlled in a stress area, the support construction cost is very high. Therefore, for the foundation pit with high stress and high deformation control requirement, under the condition of urgent construction period, it is a better choice to develop a fabricated reinforced concrete support beam structure capable of being quickly installed and demolished (see invention CN118727775A). In order to further overcome the shortcomings of the fabricated reinforced concrete support beam section that is heavy and difficult to hoist, it is necessary to develop a new mortise and tenon joint support beam section structure. SUMMARY

[0003] The utility model aims at solving the problems existing in the current foundation pit support system, and provides a fabricated foundation pit mortise and tenon joint support beam section convenient to demolish, so as to achieve the purpose of safe, efficient, fast and recyclable foundation pit support.

[0004] In order to solve the above problems, the utility model provides a fabricated foundation pit mortise and tenon joint support beam section convenient to demolish, which comprises a standard T-shaped beam piece, a U-shaped beam piece and a short T-shaped beam piece, the fabricated foundation pit mortise and tenon joint support beam section convenient to demolish is formed by tightly splicing a plurality of standard T-shaped beam pieces, U-shaped beam pieces and two short T-shaped beam pieces; the standard T-shaped beam piece and the U-shaped beam piece are the same in length, the protruding part of the standard T-shaped beam piece or the short T-shaped beam piece is seamlessly dovetailed with the groove part of the U-shaped beam piece to form a mortise and tenon joint structure, the end faces of the adjacent standard T-shaped beam pieces are tightly butt-jointed or the end faces of the standard T-shaped beam piece and the short T-shaped beam piece are tightly butt-jointed, and the butt-joint seams are located at the midline positions of the lengths of the U-shaped beam pieces; the end faces of the adjacent U-shaped beam pieces are tightly butt-jointed, and the butt-joint seams are located at the midline positions of the lengths of the standard T-shaped beam pieces; two butt-joint steel plates are arranged at each splicing position across the seams to realize the connection of the adjacent standard T-shaped beam pieces or the standard T-shaped beam piece and the short T-shaped beam piece and anchor the mortise and tenon joint structure into a whole.

[0005] Further, the butt joint steel plate is provided with screw holes; the end of the standard T-shaped beam piece, the U-shaped beam piece and the short T-shaped beam piece is respectively provided with a vertical connecting hole, a vertical butt joint hole and a vertical connecting hole; the middle line of the longitudinal length of the standard T-shaped beam piece and the U-shaped beam piece is respectively provided with a vertical through hole and a vertical through hole; the vertical connecting hole, the vertical butt joint hole, the vertical connecting hole, the vertical through hole and the vertical through hole have the same hole diameter and are all through holes; at the butt joint seam of each pair of standard T-shaped beam pieces or the butt joint seam of the standard T-shaped beam piece and the short T-shaped beam piece, the screw holes on the butt joint steel plate correspond to the vertical connecting holes of the two standard T-shaped beam pieces and the vertical through holes of the U-shaped beam piece at the butt joint seam one by one and form through holes, a vertical screw is inserted into each through hole, and the part of the vertical screw extending out of the upper and lower butt joint steel plates is tightened with a vertical nut; at the butt joint seam of each pair of U-shaped beam pieces, the screw holes on the butt joint steel plate correspond to the vertical butt joint holes of the two U-shaped beam pieces and the vertical through holes of the standard T-shaped beam piece at the butt joint seam one by one and form through holes, a vertical screw is inserted into each through hole, and the part of the vertical screw extending out of the upper and lower butt joint steel plates is tightened with a vertical nut; two short T-shaped beam pieces are butt jointed at the end of each assembly type foundation mortise and tenon connection support beam segment, one end of the short T-shaped beam piece is butt jointed with the standard T-shaped beam piece, and the structure at the butt joint seam is the same as that at the butt joint seam of the adjacent standard T-shaped beam piece; one upper and lower beam end connecting steel plate is arranged at the other end of the short T-shaped beam piece, the beam end connecting steel plate is provided with a beam end connecting hole, the beam end connecting hole, the vertical connecting hole of the short T-shaped beam piece and the vertical butt joint hole of the end of the U-shaped beam piece correspond to each other one by one and form through holes, a vertical screw is inserted into each through hole, and the part of the vertical screw extending out of the upper and lower beam end connecting steel plates is tightened with a vertical nut.

[0006] Further, the end of the standard T-shaped beam piece is provided with a horizontal through hole; the middle line of the length direction of the U-shaped beam piece is provided with a horizontal connecting hole and a horizontal connecting hole; the end of the short T-shaped beam piece is provided with a horizontal butt joint hole; the horizontal through hole, the horizontal connecting hole and the horizontal butt joint hole have the same hole diameter and are all through holes; the horizontal holes formed by the horizontal through holes on the end of the adjacent two standard T-shaped beam pieces and the horizontal connecting holes on the U-shaped beam piece at the butt joint seam of each pair of standard T-shaped beam pieces in the assembly type foundation mortise and tenon connection support beam segment are arranged in rows, and the hole distance is equal; the horizontal holes formed by the horizontal through holes on the end of the adjacent standard T-shaped beam piece, the horizontal butt joint holes on the short T-shaped beam piece and the horizontal connecting holes on the U-shaped beam piece at the butt joint seam of the standard T-shaped beam piece and the short T-shaped beam piece in the assembly type foundation mortise and tenon connection support beam segment are also arranged in rows, and the hole distance is equal.

[0007] Further, the two sides of the butt joint of each pair of standard T-shaped beam pieces in the detachable assembly type foundation pit mortise and tenon connection support beam section are provided with side connecting steel plates across the joint, the side connecting steel plates are provided with screw holes, the screw holes correspond to the transverse holes at the butt joint and form through holes, a transverse screw rod is inserted into each through hole, and the part of the transverse screw rod extending out of the two side connecting steel plates is tightened with a transverse screw nut.

[0008] Further, the two sides of the butt joint of each pair of standard T-shaped beam pieces in the detachable assembly type foundation pit mortise and tenon connection support beam section are provided with side connecting steel plates across the joint, the side connecting steel plates are provided with screw holes, the screw holes correspond to the transverse holes at the butt joint and form through holes, a transverse screw rod is inserted into each through hole, and the part of the transverse screw rod extending out of the two side connecting steel plates is tightened with a transverse screw nut.

[0009] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0010] First, the detachable assembly type foundation pit mortise and tenon connection support beam section provided by the present application realizes the assembly construction of the foundation pit support, eliminates the steel reinforcement lashing and concrete curing process of the foundation pit support, shortens the construction period of the foundation pit support, and greatly saves the labor cost.

[0011] Second, the beam piece provided by the present application is light and easy to transport and install, and the foundation pit support beam section can be completely recycled after use, so that the foundation pit support beam section can be repeatedly used, the cost of the foundation pit support is greatly reduced, and carbon emissions are also reduced.

[0012] Third, the present application can be used as a support component alone or applied in other support methods, and can be used flexibly in various foundation pit shapes, has good economic benefits, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a standard T-shaped beam piece structure schematic diagram.

[0014] Fig. 2 It is a U-shaped beam piece structure schematic diagram.

[0015] Fig. 3 It is a short T-shaped beam piece structure schematic diagram.

[0016] Fig. 4 It is a butt joint steel plate and beam end connecting steel plate structure schematic diagram.

[0017] Fig. 5 It is a detachable assembly type foundation pit mortise and tenon connection support beam section structure schematic diagram.

[0018] Fig. 6This is a schematic diagram of a prefabricated foundation pit mortise and tenon joint support beam segment that is easily dismantled and connected by two H-beams.

[0019] In the diagram: 1. Standard T-beam; 101. Vertical connecting hole; 102. Horizontal through hole; 103. Vertical through hole; 2. U-beam; 201. Vertical through hole; 202. Horizontal connecting hole; 203. Vertical butt hole; 3. Short T-beam; 301. Vertical connecting hole; 302. Horizontal butt hole; 4. Beam end connecting steel plate; 401. Beam end connecting hole; 5. Butt steel plate; 501. Screw hole; 6. Vertical screw; 7. Vertical nut; 8. Side connecting steel plate; 9. H-beam; 10. Horizontal screw; 11. Horizontal nut. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see Figs. 1-3 ,like Figs. 1-5 As shown, the easily dismantled prefabricated foundation pit mortise and tenon joint support beam segment includes a standard T-shaped beam 1, a U-shaped beam 2, and a short T-shaped beam 3. This easily dismantled prefabricated foundation pit mortise and tenon joint support beam segment is composed of several standard T-shaped beams 1, U-shaped beams 2, and two short T-shaped beams 3 tightly spliced ​​together. The standard T-shaped beams 1 and U-shaped beams 2 are of the same length. The protruding part of the standard T-shaped beam 1 or the short T-shaped beam 3 seamlessly mortise and tenon joints with the grooved part of the U-shaped beam 2 to form a mortise and tenon joint structure. Adjacent standard T-shaped beams... The end faces of beam 1 are tightly butted together, or the end faces of standard T-beam 1 and short T-beam 3 are tightly butted together, with the butt joint located at the centerline of the length of U-shaped beam 2; the end faces of adjacent U-shaped beam 2 are tightly butted together, with the butt joint located at the centerline of the length of standard T-beam 1; each splicing position is provided with two butt joint steel plates 5 across the joint, which realizes the connection of adjacent standard T-beam 1 or standard T-beam 1 and short T-beam 3, while anchoring the mortise and tenon connection structure into a whole.

[0023] Preferably, screw holes 501 are opened on the butt joint steel plates 5; vertical connecting holes 101, vertical butt joint holes 203 and vertical connecting holes 301 are respectively provided at the ends of the standard T-shaped beam pieces 1, the U-shaped beam pieces 2 and the short T-shaped beam pieces 3; vertical through holes 103 and vertical through holes 201 are symmetrically provided on both sides of the middle lines of the longitudinal lengths of the standard T-shaped beam pieces 1 and the U-shaped beam pieces 2; the diameters of the vertical connecting holes 101, the vertical butt joint holes 203, the vertical connecting holes 301, the vertical through holes 103 and the vertical through holes 201 are the same and are all through holes; at each butt joint seam of a pair of standard T-shaped beam pieces 1 or at the butt joint seam of a standard T-shaped beam piece 1 and a short T-shaped beam piece 3, the screw holes 501 on the butt joint steel plates 5 correspond to the vertical connecting holes 101 of the two standard T-shaped beam pieces 1 and the vertical through holes 201 of the U-shaped beam piece 2 at the butt joint seam one by one and form through holes, a vertical screw 6 is inserted into each through hole, and a vertical nut 7 is screwed on the part of the vertical screw 6 extending out of the upper and lower butt joint steel plates 5; at each butt joint seam of a pair of U-shaped beam pieces 2, the screw holes 501 on the butt joint steel plates 5 correspond to the vertical butt joint holes 203 of the two U-shaped beam pieces 2 and the vertical through holes 103 of the standard T-shaped beam piece 1 at the butt joint seam one by one and form through holes, a vertical screw 6 is inserted into each through hole, and a vertical nut 7 is screwed on the part of the vertical screw 6 extending out of the upper and lower butt joint steel plates 5; two short T-shaped beam pieces 3 are butt jointed at the ends of each fabricated pit mortise and tenon connection support beam segment, one end of the short T-shaped beam piece 3 is butt jointed with the standard T-shaped beam piece 1, and the structure at the butt joint seam is the same as that at the butt joint seam of the adjacent standard T-shaped beam piece 1; a beam end connecting steel plate 4 is respectively provided above and below the other end of the short T-shaped beam piece 3, a beam end connecting hole 401 is provided on the beam end connecting steel plate 4, the beam end connecting hole 401, the vertical connecting hole 301 of the short T-shaped beam piece 3 and the vertical butt joint hole 203 at the end of the U-shaped beam piece 2 correspond to each other one by one and form through holes, a vertical screw 6 is inserted into each through hole, and a vertical nut 7 is screwed on the part of the vertical screw 6 extending out of the upper and lower beam end connecting steel plates 4.

[0024] As Figs. 1-3As shown, the standard T-beam 1 has a transverse through hole 102 on the side of its end; the U-beam 2 has transverse connecting holes 202 symmetrically arranged on both sides of the centerline along its length; and the short T-beam 3 has a transverse butt hole 302 on the side of its end. The transverse through holes 102, transverse connecting holes 202, and transverse butt holes 302 have the same diameter and are all through holes. At the butt joint of each pair of standard T-beams 1 in the prefabricated foundation pit tenon-and-mortise connection support beam segment, the side of the joint is connected by transverse through holes 102 on the side of the ends of two adjacent standard T-beams 1. 2. The transverse holes formed by the transverse connecting holes 202 on the U-shaped beam 2 at the joint are arranged in rows with equal spacing. On the side of the joint between the standard T-shaped beam 1 and the short T-shaped beam 3 in the prefabricated foundation pit tenon-and-mortise connection support beam segment that is easy to dismantle, the transverse holes formed by the transverse through holes 102 on the side of the end of the adjacent standard T-shaped beam 1, the transverse docking holes 302 on the short T-shaped beam 3, and the transverse connecting holes 202 on the U-shaped beam 2 at the joint are also arranged in rows with equal spacing. On both sides of the joint of each pair of standard T-shaped beams 1 in the prefabricated foundation pit tenon-and-mortise connection support beam segment that is easy to dismantle, there are side connecting steel plates 8 across the joint. The side connecting steel plates 8 are provided with screw holes, which correspond one-to-one with the transverse holes at the joint and form through holes. A transverse screw 10 is inserted into each through hole, and the part of the transverse screw 10 extending out of the side connecting steel plates 8 on both sides is tightened with a transverse nut 11.

[0025] On both sides of the butt joint between the standard T-shaped beam 1 and the short T-shaped beam 3 in the prefabricated foundation pit tenon and tenon connection support beam segment, there is a side connecting steel plate 8 across the joint. The side connecting steel plate 8 is provided with screw holes, which correspond one-to-one with the transverse holes at the butt joint and form through holes. A transverse screw 10 is inserted into each through hole, and the part of the transverse screw 10 extending out of the side connecting steel plates 8 on both sides is tightened with a transverse nut 11.

[0026] The standard T-shaped beam 1, U-shaped beam 2, and short T-shaped beam 3 are precast reinforced concrete components that can be prefabricated in a factory. The various holes contained therein are formed by pre-embedded plastic pipes or by using steel pipes and removing the pipes before the concrete sets.

[0027] During on-site installation in the foundation pit, first prepare the lattice columns and capping beams, and then install corbels and foundations on the capping beams. Prepare temporary supports, and use a crane to hoist standard T-shaped beam segments 1, U-shaped beam segments 2, and short T-shaped beam segments 3 one by one, assembling them one by one with vertical screws 6 and vertical nuts 7 into a prefabricated foundation pit tenon-and-mortise connection support beam segment, so that the ends of the beam segments are placed on the foundations and the middle parts are placed on the lattice columns to form the main supports. After the main supports are constructed, construct the steel structure auxiliary supports between the supports. The construction sequence is to first fix the side connecting steel plates 8 with horizontal screws 10 and horizontal nuts 11, and then weld the steel structure auxiliary support skeleton H-beams 9 (such as...) to the side connecting steel plates 8. Fig. 6 (As shown).

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated foundation pit tenon-and-mortise connection support beam segment that is easy to dismantle, including a standard T-shaped beam segment (1), a U-shaped beam segment (2), and a short T-shaped beam segment (3), characterized in that: The easily dismantled prefabricated foundation pit mortise and tenon joint support beam segment is composed of several standard T-shaped beams (1), U-shaped beams (2), and two short T-shaped beams (3) tightly spliced ​​together; the standard T-shaped beams (1) and U-shaped beams (2) are of the same length, and the protruding part of the standard T-shaped beam (1) or the short T-shaped beam (3) is seamlessly mortised with the groove part of the U-shaped beam (2) to form a mortise and tenon joint structure, and the end faces of adjacent standard T-shaped beams (1) are tightly butted together or the standard T-shaped beams (1) and the short T-shaped beams (3) are tightly butted together. The end faces of the T-shaped beam (3) are tightly joined together, and the joint is located at the midline of the length of the U-shaped beam (2); the end faces of adjacent U-shaped beams (2) are tightly joined together, and the joint is located at the midline of the length of the standard T-shaped beam (1); each splicing position is provided with two steel plates (5) for the upper and lower joints, so as to connect adjacent standard T-shaped beams (1) or standard T-shaped beams (1) and short T-shaped beams (3) while anchoring the mortise and tenon connection structure into a whole.

2. The easily dismantled prefabricated foundation pit tenon-and-mortise connection support beam segment according to claim 1, characterized in that: The steel plate (5) has a screw hole (501); the ends of the standard T-beam (1), U-beam (2) and short T-beam (3) have vertical connecting holes (101), vertical docking holes (203) and vertical connecting holes (301), respectively; the standard T-beam (1) and U-beam (2) have vertical through holes (103) and vertical through holes (201) symmetrically arranged on both sides of the centerline of the longitudinal length of the standard T-beam (1) and U-beam (2); the vertical connecting holes (101), vertical docking holes (203), vertical connecting holes (301), vertical through holes (103) and vertical through holes (201) has the same diameter and is a through hole; at the joint of each pair of standard T-beams (1) or the joint of standard T-beams (1) and short T-beams (3), the screw holes (501) on the connecting steel plate (5) correspond one-to-one with the vertical connecting holes (101) of the two standard T-beams (1) and the vertical through holes (201) of the U-shaped beams (2) at the joint and form through holes. A vertical screw (6) is inserted in each through hole, and a vertical nut (7) is tightened on the part of the vertical screw (6) that extends out of the upper and lower connecting steel plates (5); at each pair of U-shaped At the joint of the beam (2), the screw holes (501) on the connecting steel plate (5) correspond one-to-one with the vertical connecting holes (203) of the two U-shaped beams (2) and the vertical through holes (103) of the standard T-shaped beam (1) at the joint, forming through holes. A vertical screw (6) is inserted into each through hole, and a vertical nut (7) is tightened on the part of the vertical screw (6) that extends out of the upper and lower connecting steel plates (5). At the end of each of the prefabricated foundation pit tenon and mortise connection support beam segments, two short T-shaped beams (3) are connected. One end of the short T-shaped beam (3) is connected to the standard T-shaped beam (103). The structure of the joint is the same as that of the joint of the adjacent standard T-beam (1); the other end of the short T-beam (3) is provided with a beam end connecting steel plate (4) at the top and bottom, which is provided with a beam end connecting hole (401). The beam end connecting hole (401), the vertical connecting hole (301) of the short T-beam (3), and the vertical docking hole (203) at the end of the U-beam (2) correspond one-to-one and form a through hole. A vertical screw (6) is inserted in each through hole. The part of the vertical screw (6) that extends out of the upper and lower beam end connecting steel plates (4) is tightened with a vertical nut (7).

3. The easily dismantled prefabricated foundation pit tenon-and-mortise connection support beam segment according to claim 2, characterized in that: The standard T-shaped beam (1) has a transverse through hole (102) on the side of its end; the U-shaped beam (2) has transverse connecting holes (202) symmetrically arranged on both sides of the centerline in the length direction; the short T-shaped beam (3) has a transverse butt hole (302) on the side of its end; the transverse through hole (102), transverse connecting hole (202) and transverse butt hole (302) have the same diameter and are all through holes; on the side of the butt joint of each pair of standard T-shaped beams (1) in the prefabricated foundation pit tenon and mortise connection support beam segment, the transverse through hole (102) on the side of the end of the two adjacent standard T-shaped beams (1) is provided. The transverse holes formed by the hole (102) and the transverse connecting hole (202) on the U-shaped beam (2) at the joint are arranged in rows with equal spacing. On the side of the joint between the standard T-shaped beam (1) and the short T-shaped beam (3) in the prefabricated foundation pit tenon-and-mortise connection support beam segment that is easy to dismantle, the transverse holes formed by the transverse through hole (102) on the side of the end of the adjacent standard T-shaped beam (1), the transverse docking hole (302) on the short T-shaped beam (3) and the transverse connecting hole (202) on the U-shaped beam (2) at the joint are also arranged in rows with equal spacing.

4. The easily dismantled prefabricated foundation pit tenon-and-mortise connection support beam segment according to claim 3, characterized in that: In the prefabricated foundation pit tenon and mortise connection support beam segment that is easy to dismantle, each pair of standard T-shaped beams (1) has two sides of the butt joint, and a side connecting steel plate (8) is provided across the joint. The side connecting steel plate (8) is provided with screw holes, and the screw holes correspond one-to-one with the transverse holes at the butt joint and form through holes. A transverse screw (10) is inserted into each through hole, and the part of the transverse screw (10) extending out of the side connecting steel plates (8) on both sides is tightened with a transverse nut (11).

5. The easily dismantled prefabricated foundation pit tenon-and-mortise connection support beam segment according to claim 4, characterized in that: The standard T-shaped beam (1) and the short T-shaped beam (3) in the prefabricated foundation pit tenon and tenon connection support beam segment are provided with side connecting steel plates (8) across the joint on both sides. The side connecting steel plates (8) are provided with screw holes. The screw holes correspond one-to-one with the transverse holes at the joint and form through holes. A transverse screw rod (10) is inserted into each through hole. The part of the transverse screw rod (10) extending out of the side connecting steel plates (8) on both sides is tightened with a transverse nut (11).

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