Cable support protection structure crossing deep foundation pit

Abstract

The utility model discloses a cable support protection structure crossing a deep foundation pit, and belongs to the technical field of underground engineering construction. Comprising a deep foundation pit; the top beam is erected between the top ground of the deep foundation pit; the supporting plate is arranged at the bottom of the top beam; the supporting mechanisms are arranged between the bottoms of the two ends of the supporting plate and the inner walls of the two sides of the deep foundation pit, the top beam stretches across the top of the deep foundation pit, the two ends of the top beam are supported on the ground of the edge of the deep foundation pit, and a cable is dragged through the supporting plate at the bottom of the top beam. And the supporting mechanism is connected with the inner wall of the deep foundation pit to achieve the purpose of providing vertical supporting for the supporting plate, the supporting mechanism can replace a supporting point downwards along with deepening of the excavation depth, the supporting point is made to be close to the bottom of the deep foundation pit, the situation that the supporting point is too high, and consequently the side wall of the deep foundation pit falls off is avoided, and supporting stability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of underground engineering construction, and more specifically, to a cable support protection structure spanning a deep foundation pit. Background Art

[0002] When excavating deep foundation pits such as sewer wells and building foundation pits, underground cable pipeline areas are often passed through. During deep foundation pit construction, the cables need to be supported to prevent the cables from sinking and breaking during excavation.

[0003] The document with the prior art publication number CN220652868U provides a cable support protection structure across a deep foundation pit, including a porous cable tray, steel sheet piles, a supporting structure, and a steel supporting member; the steel sheet piles and the porous cable tray are both buried underground, and both ends of the porous cable tray are erected on the supporting structure, and the supporting structure is set on the foundation. There are two rows of steel sheet piles, which are respectively located on both sides of the comprehensive pipe corridor foundation pit, and steel pipe supports are arranged between the two rows of steel sheet piles; the steel supporting member includes a longitudinal beam, a transverse beam and a threaded steel adjusting hanger, the longitudinal beam and the transverse beam are both horizontally arranged and perpendicular to each other, the longitudinal beam is erected on the ground cushion layer, the transverse beam is suspended below the longitudinal beam by a threaded steel adjusting hanger, the transverse beam is arranged across the bottom of the porous cable tray, and the transverse beam is used to support the porous cable tray.

[0004] Although the above-mentioned prior art solutions can achieve the relevant beneficial effects through the structure of the prior art, they still have the following defects:

[0005] The support is directly connected to the bottom of the deep foundation pit through steel sheet piles. During the excavation of the foundation pit, the bottom needs to be further deepened. In this case, it is impossible to provide real-time support during the excavation of the foundation pit. Vertical support can only be performed after the excavation of the foundation pit. During the excavation of the foundation pit, the cable can only be supported by the beams spanning the bottom of the foundation pit. The span is long and the lack of vertical support during construction results in poor protection.

[0006] Regarding the above-mentioned related technologies, the utility model inventor believes that by directly connecting the steel sheet piles to the bottom of the deep foundation pit for support, the bottom of the foundation pit needs to be further deepened during the excavation of the foundation pit, and real-time support cannot be provided during the excavation of the foundation pit. Vertical support can only be provided after the excavation of the foundation pit. In this case, during the excavation of the foundation pit, the cable can only be supported by the beams spanning the bottom of the foundation pit. The span is long, and the lack of vertical support during construction results in poor protection.

[0007] In view of this, we propose a cable support protection structure across the deep foundation pit. Utility Model Content

[0008] 1. Technical issues to be solved

[0009] The purpose of the present application is to provide a cable support protection structure spanning a deep foundation pit, which solves the technical problem that the support is directly connected to the bottom of the deep foundation pit by steel sheet piles in the above-mentioned background technology. During the excavation of the foundation pit, its bottom needs to be further deepened, and it is impossible to provide real-time support during the excavation of the foundation pit. Vertical support can only be performed after the excavation of the foundation pit. Then, during the foundation pit excavation construction, the cable can only be supported by the beam spanning the bottom of the foundation pit. The span is long and the lack of vertical support during construction leads to poor protection effect, thereby achieving the technical effect.

[0010] 2. Technical solution

[0011] The technical solution of the present application provides a cable support protection structure across a deep foundation pit, comprising:

[0012] Deep foundation pit;

[0013] A top beam is provided between the top and the ground of the deep foundation pit;

[0014] A support plate is provided at the bottom of the top beam;

[0015] Support mechanism: support mechanism is provided between the bottom of both ends of the support plate and the inner walls on both sides of the deep foundation pit.

[0016] Through the above scheme, the top beam spans the top of the deep foundation pit, and the two ends of the top beam are supported on the ground at the edge of the deep foundation pit. The cable is dragged by the support plate at the bottom of the top beam, and the inner wall of the deep foundation pit is connected by the support mechanism to provide vertical support for the support plate. As the excavation depth increases, the support mechanism can replace the support point downward so that the support point is close to the bottom of the deep foundation pit, thereby avoiding the side wall of the deep foundation pit falling off due to the support point being too high, thereby improving the support stability.

[0017] Optionally, a reinforcing truss is fixedly provided on the top of the top beam, the edge of the reinforcing truss is an isosceles trapezoidal structure, and a plurality of triangular cavities are formed in the middle of the reinforcing truss through reinforcing rods.

[0018] Optionally, the support plate includes end plates, both ends of the bottom of the top beam are provided with end plates, and the tops of both sides of the end plates are fixed with hangers, the tops of the hangers slide through the sides of the top beam and are threaded with locking nuts, and the tops of the end plates are provided with multiple connecting grooves, and a connecting plate is clamped between the connecting grooves of two end plates, and the two ends of the connecting plate are connected to the bottom of the connecting grooves by countersunk bolts.

[0019] Through the above scheme, after the top beam is erected, the end plate is hung at the bottom of the top beam through the hanger and the locking nut, and is clamped in the connecting groove through the connecting plate and locked by bolts, so that the end plate and the top of the connecting plate form a plane to hold the cable, and the connection between the end plate and the connecting plate achieves the adjustability of the holding length, which is convenient for use in deep foundation pits of different widths.

[0020] Optionally, the supporting mechanism includes a U-shaped seat, a plurality of U-shaped seats are fixedly installed on the bottom of the end plate, a rotating plate is rotatably installed in the U-shaped seat via a pin shaft, a sliding frame is slidably sleeved on the bottom of the rotating plate, a plurality of locking holes are opened on the rotating plate, a plurality of screw holes are opened on the side wall of the sliding frame, locking pins are sleeved in the screw holes via a threaded structure, the locking pins are movably engaged with the locking holes, a connecting seat is hinged on the bottom of the sliding frame, the connecting seat is connected to the inner wall of the deep foundation pit via anchor bolts, the locking holes are evenly distributed along the length direction of the rotating plate, the diameter of the locking pin is equal to the diameter of the locking hole, two adjacent locking holes intersect, and the length of the line connecting the intersection points of the locking holes is less than the diameter of the locking pin.

[0021] Through the above scheme, the rotating plate can rotate along the U-shaped seat, and after the locking pin is screwed to disengage from the locking hole, the sliding frame can slide along the rotating plate to adjust the spacing, and is locked after the locking pin is screwed into the locking hole, so that multiple connecting seats can be distributed along the height of the deep foundation pit, thereby achieving the purpose of multi-point support, and as the excavation depth of the deep foundation pit deepens, the anchor bolts between the top connecting seat and the inner wall of the deep foundation pit can be screwed out, and then the distance between the sliding frame and the rotating plate can be lengthened, so that the connecting seat is moved to the bottom of the deep foundation pit, so as to achieve the purpose of adjusting the support point during construction, so that the support point is close to the bottom of the deep foundation pit, to avoid the inner wall of the deep foundation pit falling off due to the support point being too high, and to improve the support strength.

[0022] 3. Beneficial effects

[0023] One or more technical solutions provided in the technical solution of this application have at least the following technical effects or advantages:

[0024] 1. After the top beam is erected, the end plate is hung at the bottom of the top beam through the hanger and the locking nut, and the connecting plate is clamped in the connecting groove and locked by bolts, so that the end plate and the top of the connecting plate form a plane to hold the cable, and the connection between the end plate and the connecting plate can achieve the adjustable holding length, which is convenient for use in deep foundation pits of different widths;

[0025] 2. The rotating plate can rotate along the U-shaped seat. After the locking pin is screwed out of the locking hole, the sliding frame can slide along the rotating plate to adjust the spacing, and the locking pin is screwed into the locking hole and locked, so that multiple connecting seats can be distributed along the height of the deep foundation pit, thereby achieving the purpose of multi-point support, and as the excavation depth of the deep foundation pit deepens, the anchor bolts between the top connecting seat and the inner wall of the deep foundation pit can be screwed out, and then the distance between the sliding frame and the rotating plate can be lengthened, so as to move the connecting seat to the bottom of the deep foundation pit, so as to achieve the purpose of adjusting the support point during construction, so that the support point is close to the bottom of the deep foundation pit, to avoid the inner wall of the deep foundation pit falling off due to the support point being too high, and to improve the support strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a cable support protection structure across a deep foundation pit disclosed in a preferred embodiment of the present application;

[0027] Figure 2 A preferred embodiment of the present application is disclosed Figure 1 The enlarged structural diagram at A in the middle;

[0028] Figure 3 A preferred embodiment of the present application is disclosed Figure 1 The enlarged structural diagram at B in the middle;

[0029] Figure 4 A preferred embodiment of the present application is disclosed Figure 3 The enlarged structural diagram at C in the middle;

[0030] Explanation of the numbers in the figure: 1. Top beam; 2. Support plate; 21. End plate; 22. Hanging rod; 23. Connection groove; 24. Connection plate; 3. Support mechanism; 31. U-shaped seat; 32. Rotating plate; 33. Sliding frame; 34. Locking hole; 35. Screw hole; 36. Locking pin; 37. Connection seat; 4. Deep foundation pit; 5. Strengthened truss DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] Reference Figure 1 The embodiment of the present application provides a cable support and protection structure across a deep foundation pit, comprising: a deep foundation pit 4; a top beam 1, a top beam 1 is arranged between the top and ground of the deep foundation pit 4; a support plate 2, a support plate 2 is arranged at the bottom of the top beam 1; a supporting mechanism 3, a supporting mechanism 3 is arranged between the bottom of both ends of the support plate 2 and the inner walls of both sides of the deep foundation pit 4, the top beam 1 spans the top of the deep foundation pit 4, the two ends of the top beam 1 are supported on the ground at the edge of the deep foundation pit 4, the cable is dragged by the support plate 2 at the bottom of the top beam 1, and the inner wall of the deep foundation pit 4 is connected by the supporting mechanism 3 to provide vertical support for the support plate 2, and as the excavation depth increases, the supporting mechanism 3 can replace the supporting point downward, so that the supporting point is close to the bottom of the deep foundation pit 4, to avoid the side wall of the deep foundation pit 4 falling off due to the supporting point being too high, thereby improving the support stability.

[0033] Reference Figure 1 and Figure 2 A strengthening truss 5 is fixedly provided on the top of the top beam 1. The edge of the strengthening truss 5 is an isosceles trapezoidal structure, and a plurality of triangular cavities are formed in the middle of the strengthening truss 5 through strengthening rods. The strengthening truss 5 improves the bending resistance of the top beam 1, thereby improving the towing capacity.

[0034] Reference Figure 1 and Figure 2The support plate 2 includes an end plate 21, and end plates 21 are provided at both ends of the bottom of the top beam 1. Hanging rods 22 are fixed on the top of both sides of the end plate 21. The top of the hanging rod 22 slides through the side of the top beam 1 and is threaded with a locking nut. A plurality of connecting grooves 23 are opened on the top of the end plate 21. A connecting plate 24 is clamped between the connecting grooves 23 of the two end plates 21, and the two ends of the connecting plate 24 are connected to the bottom of the connecting groove 23 by countersunk bolts. After the top beam 1 is erected, the end plate 21 is suspended at the bottom of the top beam 1 through the hanging rod 22 and the locking nut, and the connecting groove 23 is clamped by the connecting plate 24 and locked by bolts, so that the top of the end plate 21 and the connecting plate 24 form a plane to hold the cable, and the connection between the end plate 21 and the connecting plate 24 achieves the adjustability of the holding length, which is convenient for the use of deep foundation pits 4 of different widths.

[0035] Reference Figures 1 to 4 The support mechanism 3 includes a U-shaped seat 31, and a plurality of U-shaped seats 31 are fixedly installed at the bottom of the end plate 21. A rotating plate 32 is rotatably installed in the U-shaped seat 31 through a pin shaft, and a sliding frame 33 is slidably sleeved at the bottom of the rotating plate 32. A plurality of locking holes 34 are opened on the rotating plate 32, and a plurality of screw holes 35 are opened on the side wall of the sliding frame 33. A locking pin 36 is sleeved in the screw hole 35 through a threaded structure, and the locking pin 36 is movably engaged with the locking hole 34. A connecting seat 37 is hinged at the bottom of the sliding frame 33, and the connecting seat 37 is connected to the inner wall of the deep foundation pit 4 through anchor bolts. The locking holes 34 are evenly distributed along the length direction of the rotating plate 32, the diameter of the locking pin 36 is equal to the diameter of the locking hole 34, two adjacent locking holes 34 intersect, and the length of the intersection line of the locking holes 34 is less than the locking hole 34. The diameter of the fixed pin 36 is such that the rotating plate 32 can rotate along the U-shaped seat 31. After the locking pin 36 is screwed to disengage the locking hole 34, the sliding frame 33 can slide along the rotating plate 32 to adjust the spacing, and is locked after the locking pin 36 is screwed into the locking hole 34, so that multiple connecting seats 37 can be distributed along the height of the deep foundation pit 4, thereby achieving the purpose of multi-point support, and as the excavation depth of the deep foundation pit 4 deepens, the anchor bolts between the top connecting seat 37 and the inner wall of the deep foundation pit 4 can be screwed out, and then the distance between the sliding frame 33 and the rotating plate 32 can be lengthened, so that the connecting seat 37 is moved to the bottom of the deep foundation pit 4, so as to achieve the purpose of adjusting the support point during construction, so that the support point is close to the bottom of the deep foundation pit 4, to avoid the inner wall of the deep foundation pit 4 falling off due to the support point being too high, and to improve the support strength.

[0036] Working principle: After the top beam 1 is erected, the end plate 21 is hung at the bottom of the top beam 1 through the suspension rod 22 and the locking nut, and the connecting plate 24 is clamped in the connecting groove 23 and locked by bolts, so that the top of the end plate 21 and the connecting plate 24 form a plane to hold the cable, and the connection between the end plate 21 and the connecting plate 24 can achieve the adjustability of the holding length, which is convenient for the use of deep foundation pits 4 of different widths. The rotating plate 32 can rotate along the U-shaped seat 31. After the locking pin 36 is twisted to disengage from the locking hole 34, the sliding frame 33 can slide along the rotating plate 32 to adjust the spacing, and through the locking After the pin 36 is screwed into the locking hole 34 and locked, multiple connecting seats 37 can be distributed along the height of the deep foundation pit 4, thereby achieving the purpose of multi-point support, and as the excavation depth of the deep foundation pit 4 increases, the anchor bolts between the top connecting seat 37 and the inner wall of the deep foundation pit 4 can be screwed out, and then the distance between the sliding frame 33 and the rotating plate 32 can be lengthened, so as to move the connecting seat 37 to the bottom of the deep foundation pit 4, so as to achieve the purpose of adjusting the support point during construction, so that the support point is close to the bottom of the deep foundation pit 4, to avoid the inner wall of the deep foundation pit 4 falling off due to the support point being too high, and to improve the support strength.

Claims

1. A cable support protection structure across a deep foundation pit, characterized in that: Include: Deep foundation pit (4); A top beam (1), wherein a top beam (1) is arranged between the top and the ground of the deep foundation pit (4); A support plate (2), wherein the bottom of the top beam (1) is provided with a support plate (2); A supporting mechanism (3) is provided between the bottoms of both ends of the support plate (2) and the inner walls of both sides of the deep foundation pit (4).

2. A cable support protection structure across a deep foundation pit according to claim 1, characterized in that: A strengthening truss (5) is fixedly provided on the top of the top beam (1), the edge of the strengthening truss (5) is in an isosceles trapezoidal structure, and a plurality of triangular cavities are formed in the middle of the strengthening truss (5) through strengthening rods.

3. The cable support protection structure across a deep foundation pit according to claim 1, characterized in that: The support plate (2) comprises an end plate (21), and both ends of the bottom of the top beam (1) are provided with an end plate (21), and the tops of both sides of the end plates (21) are fixedly provided with suspension rods (22), and the tops of the suspension rods (22) slide through the side of the top beam (1) and are threadedly sleeved with locking nuts, and the tops of the end plates (21) are provided with a plurality of connecting grooves (23), and a connecting plate (24) is clamped between the connecting grooves (23) of two end plates (21), and the two ends of the connecting plate (24) are connected to the bottom of the connecting groove (23) by countersunk bolts.

4. A cable support protection structure across a deep foundation pit according to claim 3, characterized in that: The support mechanism (3) comprises a U-shaped seat (31), a plurality of U-shaped seats (31) are fixedly mounted on the bottom of the end plate (21), a rotating plate (32) is rotatably mounted in each of the U-shaped seats (31) via a pin shaft, a sliding frame (33) is slidably sleeved on the bottom of each of the rotating plates (32), a plurality of locking holes (34) are formed on the rotating plate (32), a plurality of screw holes (35) are formed on the side wall of the sliding frame (33), a locking pin (36) is sleeved in each of the screw holes (35) via a threaded structure, the locking pin (36) is movably engaged with the locking hole (34), a connecting seat (37) is hingedly mounted on the bottom of the sliding frame (33), and the connecting seat (37) is connected to the inner wall of the deep foundation pit (4) via anchor bolts.

5. A cable support and protection structure across a deep foundation pit according to claim 4, characterized in that: The locking holes (34) are evenly distributed along the length direction of the rotating plate (32); the diameter of the locking pin (36) is equal to the diameter of the locking hole (34); two adjacent locking holes (34) intersect, and the length of the line connecting the intersection points of the locking holes (34) is less than the diameter of the locking pin (36).

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