Large-span reinforced concrete inner supporting structure for deep foundation pit

Abstract

The invention discloses a deep foundation pit large-span reinforced concrete inner supporting structure, and relates to the technical field of foundation pit supporting inner supporting, the deep foundation pit large-span reinforced concrete inner supporting structure comprises an inner supporting assembly and a guide assembly, the guide assembly is arranged above the inner supporting assembly, and the guide assembly is located in the inner supporting assembly; the inner supporting assembly comprises an annular rail, a guide seat is arranged in the annular rail, and a plurality of first balls which are distributed at equal intervals are rotationally arranged at the bottom of the guide seat. Through the annular track, the power assembly, the electric sliding table, the hydraulic capstan and the steel cable which are arranged, installation of the annular track, the power assembly, the electric sliding table, the hydraulic capstan and the steel cable can be synchronously completed when the inner support is built, then the position of the steel cable can be adjusted through the electric sliding table, and the height of the steel cable can be adjusted through the hydraulic capstan; therefore, the formwork can be transported during follow-up construction, large hoisting equipment is not needed, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of inner support for foundation pit support, and in particular to a large-span reinforced concrete inner support structure for a deep foundation pit. Background Art

[0002] The internal support of the support structure must adopt a stable structural system and connection structure, and the internal support structural system is preferred. During the excavation process of the foundation pit, supports need to be installed around the foundation pit to prevent soil around the foundation pit from falling into the foundation pit. As the excavation work progresses, the pressure on the support gradually increases. In order to ensure the stability of the support, internal support positions are also required to provide support.

[0003] In the prior art, the inner support is divided into concrete material and steel pipe material. When the concrete material is used to manufacture the inner support, it is necessary to build a template and then pour concrete into the mold formed by the template. The construction of the inner support is from top to bottom, because it is poured first and then excavated. In this process, the soil produced by excavation will be blocked by the inner support, and the large number of support beams in the inner support will also cause inconvenience to the soil transportation work. In addition, the large number of support beams will also make the transportation of the inner support template more cumbersome, and the foundation pit ground needs to be continuously excavated, and tower cranes are not suitable for large-span foundation pit construction work. Large-span foundation pits usually require a large number of tower cranes to work together. Finally, the inner support needs to be dismantled after construction. The dismantling work needs to be from top to bottom, and in some areas where blasting demolition cannot be used, it is also necessary to use equipment to carry out dismantling work in sequence, which requires the work of a large number of tower cranes. Summary of the invention

[0004] The purpose of the present invention is to provide a deep foundation pit large-span reinforced concrete inner support structure to solve the technical problems in the prior art.

[0005] The present invention provides a deep foundation pit large-span reinforced concrete inner support structure, comprising:

[0006] An inner support assembly and a guide assembly, wherein the guide assembly is arranged above the inner support assembly, and the guide assembly is located inside the inner support assembly;

[0007] Wherein, the inner support assembly comprises:

[0008] An annular track, wherein a guide seat is arranged in the annular track, a plurality of first balls distributed equidistantly are rotatably arranged at the bottom of the guide seat, and a plurality of second balls distributed equidistantly are rotatably arranged on both side walls of the guide seat;

[0009] A connecting seat, the connecting seat is fixed on the top of the guide seat, a power assembly is arranged on one side of the top of the connecting seat, and the power assembly is in conflict with the annular track, and the power assembly is used to drive the connecting seat to move along the top of the annular track;

[0010] An electric slide is arranged on the side wall of the connecting seat, a hydraulic winch is fixed on the moving end of the electric slide, a steel cable is fixed on the rotating shaft of the hydraulic winch, and the steel cable is used to fix the template and the disassembly tool.

[0011] Preferably, the inner support assembly comprises:

[0012] A plurality of annular inner supports, the plurality of annular inner supports are distributed up and down, and a plurality of strip inner supports are fixed on each of the annular inner supports;

[0013] A plurality of first support beams, wherein two ends of the plurality of first support beams are respectively fixed to two upper and lower adjacent strip-shaped inner supports;

[0014] A plurality of second support beams, both ends of which are respectively fixed to two adjacent annular inner supports.

[0015] Preferably, the inner support assembly further comprises:

[0016] Two first support blocks, wherein the two first support blocks are fixed on the inner wall of one of the annular inner supports;

[0017] Two second support blocks are fixed on two side walls of the second support beams, and both of the two second support blocks are located above the two first support blocks. Circular grooves are provided on the tops of the first support blocks and the second support blocks.

[0018] Preferably, a plurality of first fixing seats are fixed to the inner wall of the annular inner support at the top, a plurality of second fixing seats are arranged at the bottom of the annular track, and a plurality of fixing bolts are fixed to the side wall of each second fixing seat, and the first fixing seat and the second fixing seat are fixed by fixing bolts.

[0019] Preferably, a sliding seat is fixed to each side wall of the second fixed seat, a hydraulic push rod is fixed to the bottom of the sliding seat, and the telescopic end of the hydraulic push rod is adapted to the circular groove.

[0020] Preferably, it also includes:

[0021] A plurality of guide rails are distributed up and down, and a through hole is opened on the top of the sliding seat, and the guide rails and the through hole are adapted.

[0022] Preferably, it also includes:

[0023] The support base is fixed on the top of the connecting base, and support plates are fixed on both side walls of the support base, one of the support plates is fixed to the connecting base, and the other support plate is fixed to the electric slide.

[0024] Preferably, the power assembly comprises:

[0025] A motor, wherein the motor is fixed on the top of the connecting seat;

[0026] The roller is rotatably arranged at the bottom of the connecting seat, the roller contacts the inner wall of the annular track, and the output shaft of the motor and the roller are fixed.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The present invention can realize the installation of the circular track, power assembly, electric slide, hydraulic winch and steel cable synchronously during the construction of the internal support by setting up the circular track, power assembly, electric slide, hydraulic winch and steel cable, and then the position of the steel cable can be adjusted by the electric slide, and the height of the steel cable can be adjusted by the hydraulic winch to realize the transportation of the template during the subsequent construction work, without the need for large-scale lifting equipment, thereby improving the work efficiency;

[0029] During the dismantling work, the circular track is automatically lowered through the hydraulic push rod and the first support block and the second support block, and no lifting equipment is required. At this time, the dismantling equipment is fixed on the steel cable and can be transported to various locations of the internal support to facilitate the dismantling of the internal support. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the first fixing seat and the second fixing seat of the present invention;

[0033] Figure 3 The present invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0034] Figure 4 is a schematic structural diagram of the first support block and the second support block of the present invention;

[0035] Figure 5 The present invention Figure 4 A schematic diagram of the partially enlarged structure at B in the middle;

[0036] Figure 6 It is a schematic diagram of the guide rail and the sliding seat structure of the present invention;

[0037] Figure 7 It is a schematic diagram of the guide seat and the first ball structure of the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the first ball and the second ball of the present invention.

[0039] Reference numerals:

[0040] 1. Annular inner support; 2. Strip inner support; 3. First support beam; 4. Second support beam; 5. Annular track; 6. Support seat; 7. Sliding seat; 8. Guide rail; 9. First fixed seat; 10. Second fixed seat; 11. Electric slide; 12. Hydraulic winch; 13. Steel cable; 14. Support plate; 15. Connecting seat; 16. Guide seat; 17. Motor; 18. Roller; 19. First support block; 20. Second support block; 21. Hydraulic push rod; 22. Fixing bolt; 23. First ball bearing; 24. Second ball bearing. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0042] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0043] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Combine the following Figures 1 to 8 As shown, an embodiment of the present invention provides a deep foundation pit large-span reinforced concrete inner support structure, comprising:

[0047] An inner support assembly and a guide assembly, wherein the guide assembly is arranged above the inner support assembly, and the guide assembly is located inside the inner support assembly;

[0048] Among them, the inner support assembly includes:

[0049] The annular track 5 has a guide seat 16 disposed therein, a plurality of first balls 23 rotatably disposed at the bottom of the guide seat 16 and a plurality of second balls 24 rotatably disposed at both side walls of the guide seat 16;

[0050] The connecting seat 15 is fixed on the top of the guide seat 16. A power assembly is arranged on one side of the top of the connecting seat 15, and the power assembly is in conflict with the annular track 5. The power assembly is used to drive the connecting seat 15 to move along the top of the annular track 5.

[0051] The electric slide 11 is arranged on the side wall of the connecting seat 15. A hydraulic winch 12 is fixed to the moving end of the electric slide 11. A steel cable 13 is fixed to the rotating shaft of the hydraulic winch 12. The steel cable 13 is used to fix the template and the disassembly tool.

[0052] The switch of the motor 17 is turned on. When the motor 17 is working, the roller 18 is driven to rotate. Since the roller 18 is in conflict with the inner wall of the annular track 5, the connecting seat 15 can be driven to move. Under the action of the first ball 23 and the second ball 24 on the guide seat 16, the friction between the connecting seat 15 and the annular track 5 is reduced, so that the connecting seat 15 can move relatively smoothly along the surface of the annular track 5, and then the position of the steel cable 13 is adjusted to facilitate the template construction work of the first support beam 3 and the second support beam 4 at various locations. Subsequently, the height of the end of the steel cable 13 is adjusted through the operation of the hydraulic winch 12, so that the templates of the first support beam 3 and the second support beam 4 can be moved to a suitable height, that is, during the process of internal support construction, the template transportation work is realized. In this process, no other lifting equipment is required to assist, so as to ensure that the construction can be carried out efficiently and quickly;

[0053] During the disassembly process, the steel cable 13 is used to fix the disassembly work, so that the disassembly work of each part of the inner support from top to bottom can be realized.

[0054] Further, the inner support assembly includes:

[0055] A plurality of annular inner supports 1, the plurality of annular inner supports 1 are distributed up and down, and a plurality of strip inner supports 2 are fixed on each annular inner support 1;

[0056] A plurality of first support beams 3, wherein two ends of the plurality of first support beams 3 are respectively fixed to two upper and lower adjacent strip-shaped inner supports 2;

[0057] A plurality of second support beams 4 are provided, and two ends of the plurality of second support beams 4 are respectively fixed to two adjacent annular inner supports 1 .

[0058] Furthermore, the inner support assembly also includes:

[0059] Two first support blocks 19, the two first support blocks 19 are fixed on the inner wall of one of the annular inner supports 1;

[0060] Two second support blocks 20 are fixed on the side walls of two of the second support beams 4. Both of the second support blocks 20 are located above the two first support blocks 19. Circular grooves are provided on the tops of the first support blocks 19 and the second support blocks 20.

[0061] When the second support beams 4 on the annular inner support 1 are removed, the annular track 5 still remains in a fixed state under the action of the two hydraulic push rods 21 and the two first support blocks 19. Therefore, when the annular inner support 1 and the second support beam 4 are completely removed, the height of the annular track 5 can be lowered by contracting the two hydraulic push rods 21. At the same time, the other two hydraulic push rods 21 are extended to enter the second support blocks 20 below. After each drop of the annular track 5, the guide rail 8 passing through the sliding seat 7 is disassembled to enable the connecting seat 15 to move arbitrarily on the annular track 5. Repeat the operation and the disassembly equipment on the steel cable 13 can be used to completely dismantle the inner support.

[0062] Furthermore, a plurality of first fixing seats 9 are fixed to the inner wall of the annular inner support 1 at the top, a plurality of second fixing seats 10 are arranged at the bottom of the annular track 5, and a plurality of fixing bolts 22 are fixed to the side wall of each second fixing seat 10, and the first fixing seat 9 and the second fixing seat 10 are fixed by the fixing bolts 22.

[0063] During the construction process, the annular track 5 and the inner support can be fixed by the first fixing seat 9 and the second fixing seat 10 and the bolts 22, and the guide rail 8 can be fixedly installed in sequence during the construction of the inner support, so that the annular track 5 can be lowered under the action of the hydraulic push rod 21 and the first support block 19 and the second support block 20 without the assistance of other equipment, thereby facilitating the disassembly work.

[0064] Furthermore, a sliding seat 7 is fixed to the side wall of each second fixed seat 10, and a hydraulic push rod 21 is fixed to the bottom of the sliding seat 7, and the telescopic end of the hydraulic push rod 21 is adapted to the circular groove.

[0065] Furthermore, it also includes:

[0066] A plurality of guide rails 8 are distributed up and down, and a through hole is opened on the top of the sliding seat 7, and the guide rails 8 and the through hole are adapted.

[0067] Furthermore, it also includes:

[0068] The support seat 6 is fixed on the top of the connecting seat 15 , and support plates 14 are fixed on both side walls of the support seat 6 , one of the support plates 14 is fixed to the connecting seat 15 , and the other support plate 14 is fixed to the electric slide 11 .

[0069] Furthermore, the power assembly includes:

[0070] Motor 17, motor 17 is fixed on the top of the connecting seat 15;

[0071] The roller 18 is rotatably arranged at the bottom of the connecting seat 15 , the roller 18 abuts against the inner wall of the annular track 5 , and the output shaft of the motor 17 and the roller 18 are fixed.

[0072] The specific working method is: when in use, firstly, the templates of the annular inner support 1 and the strip inner support 2 are set up at the construction location, and then concrete is poured into the built molds. After the uppermost annular inner support 1 and the strip inner support 2 are solidified and fixed with the support around the foundation pit, the earthwork excavation work is carried out;

[0073] When the excavation progresses to a certain extent, the circular track 5 and the components on the circular track 5 are transported to the circular inner support 1 by using lifting equipment, and the first fixing seat 9 and the second fixing seat 10 are fixed by fixing bolts 22 to achieve the preliminary fixing work between the circular track 5 and the circular inner support 1, and then the templates of the first support beam 3 and the second support beam 4 can be constructed;

[0074] When the formwork of the first support beam 3 and the second support beam 4 is being constructed, the switch of the motor 17 can be turned on. When the motor 17 is working, the roller 18 is driven to rotate. Since the roller 18 is in conflict with the inner wall of the annular track 5, the connecting seat 15 can be driven to move. Under the action of the first ball 23 and the second ball 24 on the guide seat 16, the friction between the connecting seat 15 and the annular track 5 is reduced, so that the connecting seat 15 can move relatively smoothly along the surface of the annular track 5, and then the position of the steel cable 13 is adjusted to facilitate the formwork construction work of the first support beam 3 and the second support beam 4 at various locations. Subsequently, the height of the end of the steel cable 13 is adjusted through the operation of the hydraulic winch 12, so that the formwork of the first support beam 3 and the second support beam 4 can be moved to a suitable height, that is, during the process of internal support construction, the formwork transportation work is realized. In this process, no other lifting equipment is required to assist, so as to ensure that the construction can be carried out efficiently and quickly.

[0075] After the construction of the first support beam 3 and the second support beam 4 is completed, the construction of the next layer of annular inner support 1 can be carried out, and the process is repeated to realize the construction of the concrete inner support, and in the process, the guide rails 8 are built in sequence;

[0076] After the second support beam 4 and the next layer of annular inner support 1 are constructed, the hydraulic push rod 21 and each sliding seat 7 are fixed, and the hydraulic push rod 21 is made to enter the corresponding circular grooves of the first support block 19 and the second support block 20;

[0077] When the inner support needs to be removed, the removal machine can be fixed to the end of the steel cable 13 to remove the annular inner support 1, the first support beam 3, and the second support beam 4. After the topmost annular inner support 1 is removed, the fixing bolts 22 are removed to release the fixation between the first fixing seat 9 and the second fixing seat 10.

[0078] When the second support beams 4 on the annular inner support 1 are removed, the annular track 5 still remains in a fixed state under the action of the two hydraulic push rods 21 and the two first support blocks 19. Therefore, when the annular inner support 1 and the second support beam 4 are completely removed, the height of the annular track 5 can be lowered by contracting the two hydraulic push rods 21. At the same time, the other two hydraulic push rods 21 are extended to enter the second support blocks 20 below. After each drop of the annular track 5, the guide rail 8 passing through the sliding seat 7 is removed to enable the connecting seat 15 to move arbitrarily on the annular track 5. Repeat the operation and the disassembly equipment on the steel cable 13 can be used to completely dismantle the inner support.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deep foundation pit with a large span reinforced concrete inner support structure, characterized in that: include: An inner support assembly and a guide assembly, wherein the guide assembly is arranged above the inner support assembly, and the guide assembly is located inside the inner support assembly; Wherein, the inner support assembly comprises: An annular track (5), wherein a guide seat (16) is arranged inside the annular track (5), a plurality of first balls (23) rotatably arranged at the bottom of the guide seat (16) and a plurality of second balls (24) rotatably arranged at the two side walls of the guide seat (16); A connecting seat (15), wherein the connecting seat (15) is fixed on the top of the guide seat (16), a power assembly is arranged on one side of the top of the connecting seat (15), and the power assembly is in contact with the annular track (5), and the power assembly is used to drive the connecting seat (15) to move along the top of the annular track (5); An electric slide (11), wherein the electric slide (11) is arranged on the side wall of the connecting seat (15), a hydraulic winch (12) is fixed to the movable end of the electric slide (11), a steel cable (13) is fixed to the rotating shaft of the hydraulic winch (12), and the steel cable (13) is used to fix the template and the disassembly tool.

2. A deep foundation pit large-span reinforced concrete inner support structure according to claim 1, characterized in that: The inner support assembly comprises: A plurality of annular inner supports (1), wherein the plurality of annular inner supports (1) are distributed vertically, and a plurality of strip-shaped inner supports (2) are fixed on each of the annular inner supports (1); A plurality of first support beams (3), wherein two ends of the plurality of first support beams (3) are respectively fixed to two upper and lower adjacent strip-shaped inner supports (2); A plurality of second support beams (4), wherein two ends of the plurality of second support beams (4) are respectively fixed to two adjacent annular inner supports (1).

3. A deep foundation pit large-span reinforced concrete inner support structure according to claim 2, characterized in that: The inner support assembly also includes: Two first support blocks (19), the two first support blocks (19) being fixed on the inner wall of one of the annular inner supports (1); Two second support blocks (20), the two second support blocks (20) are fixed on the side walls of two of the second support beams (4), the two second support blocks (20) are both located above the two first support blocks (19), and the tops of the first support blocks (19) and the second support blocks (20) are both provided with circular grooves.

4. A deep foundation pit large-span reinforced concrete inner support structure according to claim 3, characterized in that: A plurality of first fixing seats (9) are fixed to the inner wall of the annular inner support (1) at the top, a plurality of second fixing seats (10) are arranged at the bottom of the annular track (5), and a plurality of fixing bolts (22) are fixed to the side wall of each of the second fixing seats (10), and the first fixing seats (9) and the second fixing seats (10) are fixed by the fixing bolts (22).

5. A deep foundation pit large span reinforced concrete inner support structure according to claim 4, characterized in that: A sliding seat (7) is fixed to the side wall of each second fixed seat (10), a hydraulic push rod (21) is fixed to the bottom of the sliding seat (7), and the telescopic end of the hydraulic push rod (21) is adapted to the circular groove.

6. A deep foundation pit large span reinforced concrete inner support structure according to claim 5, characterized in that: Also includes: A plurality of guide rails (8) are distributed up and down, and a through hole is provided on the top of the sliding seat (7), and the guide rails (8) and the through hole are adapted to each other.

7. A deep foundation pit large-span reinforced concrete inner support structure according to claim 6, characterized in that: Also includes: A support seat (6), wherein the support seat (6) is fixed on the top of the connecting seat (15), and support plates (14) are fixed to both side walls of the support seat (6), wherein one of the support plates (14) is fixed to the connecting seat (15), and the other of the support plates (14) is fixed to the electric slide (11).

8. The deep foundation pit large span reinforced concrete inner support structure according to claim 1, characterized in that: The power assembly comprises: A motor (17), wherein the motor (17) is fixed on the top of the connecting seat (15); A roller (18) is rotatably arranged at the bottom of the connecting seat (15), the roller (18) abuts against the inner wall of the annular track (5), and the output shaft of the motor (17) and the roller (18) are fixed.

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