Deep foundation pit supporting structure and supporting method thereof

Abstract

The invention relates to the technical field of deep foundation pit supporting, in particular to a deep foundation pit supporting structure and a supporting method thereof.The deep foundation pit supporting structure comprises a row pile, a first supporting frame is arranged on one side of the row pile, a plurality of second supporting frames are arranged on one side of the first supporting frame, and a first supporting seat is arranged on one side of each second supporting frame; a clamping connecting structure is arranged on the first supporting frame, the clamping connecting structure comprises a plurality of fixing frames fixedly installed on the surface of the first supporting frame, rotating rods are movably installed on the fixing frames, and two screw rods are symmetrically and movably installed in each fixing frame. According to the deep foundation pit supporting device, through the arrangement of the fixing frame, the first supporting frame and the multiple row piles are installed and fixed in a clamping connection mode, drilling does not need to be conducted on the multiple row piles, in this way, the integrity of the row piles cannot be affected, the influence on the structural strength of the row piles is avoided, and then the situation that the firmness of deep foundation pit supporting is reduced is avoided.

Description

Technical Field

[0001] The invention relates to a deep foundation pit supporting structure, in particular to a deep foundation pit supporting structure and a supporting method thereof, belonging to the technical field of deep foundation pit supporting technology. Background Art

[0002] The foundation pit is a soil pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. Before excavation, the excavation plan should be determined based on geological and hydrological data and the situation of nearby buildings on site, and waterproofing and drainage work should be done. If the excavation is not deep, the slope can be used to stabilize the soil slope, and the slope size is determined according to relevant construction regulations. The foundation pit support structure is a support, reinforcement and protection measure for the side walls of the foundation pit and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.

[0003] The existing foundation pit support structure is composed of a plurality of pile rows and support members to support the inner wall of the deep foundation pit. However, the support members and the pile rows are usually directly connected and fixed with bolts. When installing the bolts, it is necessary to drill holes on the pile rows. Drilling holes will affect the integrity of the pile rows and have a certain impact on their structural strength, which will indirectly reduce the firmness of the deep foundation pit support.

[0004] Therefore, there is an urgent need to improve a deep foundation pit support structure and a support method thereof to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a deep foundation pit support structure and a support method thereof. By setting a fixed frame, a first support frame and a plurality of pile rows are installed and fixed by a clamping connection, thereby eliminating the need to drill holes on the plurality of pile rows, thereby not affecting the integrity of the pile rows and avoiding affecting their structural strength, thereby avoiding reducing the firmness of the deep foundation pit support.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] A deep foundation pit support structure comprises a pile row, a first support frame is arranged on one side of the pile row, a plurality of second support frames are arranged on one side of the first support frame, a first support seat is arranged on one side of the plurality of second support frames, a clamping connection structure is arranged on the first support frame, the clamping connection structure comprises a plurality of fixed frames fixedly mounted on the surface of the first support frame, a rotating rod is movably mounted on the fixed frame, two screw rods are symmetrically and movably mounted inside the fixed frame, one end of the rotating rod and the screw rod are fixedly mounted with mutually meshing bevel gears, a moving block connected by threaded rotation is arranged on the screw rod, a first support block is fixedly mounted on one side of the moving block, and a clamping piece is fixedly mounted on one end of the first support block.

[0008] Preferably, a plurality of push rods are evenly fixedly mounted on the top of the rotating rod, and a rubber pad is fixedly sleeved on the push rods.

[0009] Preferably, a limit gear is fixedly mounted on the rotating rod, a plurality of fixing frames are symmetrically fixedly mounted on the surface of the fixing frame, a fixing block is arranged on the fixing frame, and a limit tooth block meshing with the limit gear is fixedly mounted on one end of the fixing block.

[0010] Preferably, one end of the limiting tooth block is configured to be conical, a plurality of pressing blocks are fixedly mounted on the surface of the limiting tooth block, and the surface of the pressing block is provided with anti-slip grooves.

[0011] Preferably, the fixing block is provided with a plurality of grooves, a spring is fixedly installed inside the groove, a clamping rod is fixedly installed at one end of the spring, and the fixing frame is provided with a plurality of clamping grooves that engage with the clamping rod.

[0012] Preferably, the fixing block and the fixing frame are slidably connected, and one end of the clamping rod is configured to be conical.

[0013] Preferably, the second support frame is internally movably installed with two connecting frames connected to the first support frame and the first support seat by multiple bolts, first fixing plates are fixedly installed on both sides of the second support frame, second fixing plates are fixedly installed on both sides of the connecting frame, and a hydraulic cylinder is fixedly installed between the first fixing plate and the second fixing plate.

[0014] Preferably, a plurality of reinforcing blocks are fixedly installed on the top and the bottom of the second support frame, and a plurality of reinforcing ribs are fixedly installed between the plurality of reinforcing blocks.

[0015] Preferably, a second support seat is provided on one side of the first support seat and is installed on the ground through a plurality of fixing bolts, a plurality of second support blocks are fixedly installed on the second support seat and the first support seat, and anchor cables are fixedly installed between a plurality of opposing second support blocks.

[0016] Preferably, a supporting method for a deep foundation pit supporting structure comprises the following steps:

[0017] S1. After the deep foundation pit is excavated, multiple rows of piles are driven into the deep foundation pit and closely attached to the inner wall of the deep foundation pit;

[0018] S2, placing the first support frame on one side of the plurality of pile rows, then putting the plurality of clamping members on the first support frame on the plurality of pile rows, and then rotating the rotating rod to drive the screw to rotate through the plurality of bevel gears, and the screw rotation drives the moving block to move through the thread, so that the two moving blocks drive the two clamping members to approach each other through the first support block and clamp them on the pile row for fixing;

[0019] S3, then, the first support seat is set up and fixed on the ground of the deep foundation pit by using a plurality of fixing bolts, and then a plurality of second support frames are arranged between the first support frame and the first support seat, and two connecting frames on the second support frame are connected and fixed with the first support frame and the first support seat by using a plurality of bolts, so that the first support frame, the second support frame and the first support seat are combined to support and fix a plurality of pile rows;

[0020] S4. Use multiple fixing bolts on one side of the first support seat to set up the second support seat on the ground of the deep foundation pit, and then install multiple anchor cables between the first support seat and the second support seat to further stabilize the first support seat, thereby completing the installation of the deep foundation pit support structure.

[0021] The present invention has at least the following beneficial effects:

[0022] By setting the fixing frame, the first support frame and the plurality of pile rows are installed and fixed by means of clamping connection. The plurality of clamping members on the first support frame are first put on the plurality of pile rows, and then the rotating rod is rotated to drive the screw to rotate through the plurality of bevel gears. The rotation of the screw drives the moving block to move through the thread, so that the two moving blocks drive the two clamping members to approach each other and be clamped on the pile row for fixing through the first support block, thereby replacing the traditional bolt connection fixing method. There is no need to drill holes on the plurality of pile rows, which will not affect the integrity of the pile row and avoid affecting its structural strength, thereby avoiding reducing the firmness of the deep foundation pit support. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the fixing frame of the present invention;

[0026] Figure 3 It is a schematic diagram of the limit gear structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the clamping rod structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the overall structure of the second support frame of the present invention;

[0029] Figure 6 It is a schematic diagram of the anchor cable structure of the present invention.

[0030] In the figure, 1, pile row; 2, first support frame; 3, second support frame; 4, first support seat; 5, clamping connection structure; 6, fixed frame; 7, rotating rod; 8, screw; 9, bevel gear; 10, moving block; 11, first support block; 12, clamping member; 13, push rod; 14, limiting gear; 15, fixed frame; 16, fixed block; 17, limiting gear block; 18, pressing block; 19, anti-slip pattern; 20, groove; 21, spring; 22, clamping rod; 23, clamping slot; 24, connecting frame; 25, first fixed plate; 26, second fixed plate; 27, hydraulic cylinder; 28, reinforcement block; 29, reinforcement rib; 30, second support seat; 31, second support block; 32, anchor cable. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 6 As shown, this embodiment provides an embodiment of a deep foundation pit support structure and a support method thereof.

[0033] A deep foundation pit support structure includes a pile row 1, a first support frame 2 is arranged on one side of the pile row 1, a plurality of second support frames 3 are arranged on one side of the first support frame 2, a first support seat 4 is arranged on one side of the plurality of second support frames 3, a clamping connection structure 5 is arranged on the first support frame 2, the clamping connection structure 5 includes a plurality of fixed frames 6 fixedly mounted on the surface of the first support frame 2, a rotating rod 7 is movably mounted on the fixed frame 6, two screw rods 8 are symmetrically and movably mounted inside the fixed frame 6, one end of the rotating rod 7 and the screw rod 8 are fixedly mounted with mutually meshing bevel gears 9, a moving block 10 connected by threaded rotation is arranged on the screw rod 8, a first support block 11 is fixedly mounted on one side of the moving block 10, and a clamping member 12 is fixedly mounted on one end of the first support block 11. By setting the fixing frame 6, the first support frame 2 and the plurality of pile rows 1 are installed and fixed by means of a clamping connection. The plurality of clamping members 12 on the first support frame 2 are first put on the plurality of pile rows 1, and then the rotating rod 7 is rotated to drive the screw 8 to rotate through the plurality of bevel gears 9. The rotation of the screw 8 drives the moving block 10 to move through the thread, so that the two moving blocks 10 drive the two clamping members 12 to be close to each other and clamped on the pile row 1 for fixation through the first support block 11, thereby replacing the traditional bolt connection fixing method, and there is no need to drill holes on the plurality of pile rows 1, so as not to affect the integrity of the pile rows 1 and avoid affecting their structural strength, thereby avoiding reducing the firmness of the deep foundation pit support.

[0034] In this embodiment, Figure 2 , Figure 3 and Figure 4 As shown, a plurality of push rods 13 are evenly fixedly installed on the top of the rotating rod 7, a rubber pad is fixedly sleeved on the push rod 13, a limit gear 14 is fixedly installed on the rotating rod 7, a plurality of fixing frames 15 are symmetrically fixedly installed on the surface of the fixed frame 6, a fixing block 16 is arranged on the fixing frame 15, a limit tooth block 17 meshing with the limit gear 14 is fixedly installed on one end of the fixing block 16, one end of the limit tooth block 17 is set to a cone, a plurality of pressing blocks 18 are fixedly installed on the surface of the limit tooth block 17, and the surface of the pressing block 18 is provided with anti-slip grooves 19. By setting the push rod 13, after a plurality of push rods 13 are evenly set on the rotating rod 7, it is more convenient to push the rotating rod 7 to rotate, so as to facilitate the operation of the staff, and the setting of the rubber pad can not only increase the friction force on the surface of the push rod 13, but also protect the palm of the staff during operation. By setting the limit gear 14, the fixing frame 15, the fixing block 16 and the limit tooth block 17, after the rotating rod 7 drives the two clamping members 12 to clamp on the pile row 1, one end of the limit tooth block 17 is meshed with the limit gear 14, so that the limit The limiting tooth block 17 is installed and supported by the fixing frame 15 and the fixing block 16, so after the limiting tooth block 17 and the limiting gear 14 are engaged, the rotating rod 7 can be fixed as a whole to prevent the rotating rod 7 from rotating when hit by stones and causing the clamping of the clamping member 12 to loosen. By setting one end of the limiting tooth block 17 to a cone, the contact range of one end of the limiting tooth block 17 is reduced, so that it can be more conveniently inserted into the limiting gear 14 for engagement. The setting of the pressing block 18 and the anti-slip groove 19 can increase the friction force on the surface of the limiting tooth block 17, making it convenient for the staff to pull it.

[0035] In this embodiment, Figure 1 , Figure 4 and Figure 5As shown, a plurality of grooves 20 are provided on the fixed block 16, a spring 21 is fixedly installed inside the groove 20, a clamping rod 22 is fixedly installed at one end of the spring 21, a plurality of clamping grooves 23 that engage with the clamping rod 22 are provided on the fixed frame 15, the fixed block 16 and the fixed frame 15 are slidably connected, one end of the clamping rod 22 is set to be conical, two connecting frames 24 that are connected to the first supporting frame 2 and the first supporting seat 4 by multiple bolts are movably installed inside the second support frame 3, first fixing plates 25 are fixedly installed on both sides of the second support frame 3, second fixing plates 26 are fixedly installed on both sides of the connecting frame 24, and a hydraulic cylinder 27 is fixedly installed between the first fixing plate 25 and the second fixing plate 26. By means of the arrangement of the grooves 20, the springs 21, the clamping rods 22 and the clamping grooves 23, a plurality of clamping grooves 23 are provided on the fixing frame 15. After the limiting tooth block 17 and the limiting gear 14 are meshed, the clamping rods 22 on both sides of the fixing block 16 are clamped in the clamping grooves 23 under the support of the springs 21, which can further reinforce the limiting tooth block 17 and make the meshing of the limiting tooth block 17 and the limiting gear 14 more stable. When the rotating rod 7 needs to be rotated, the limiting tooth block 17 is pulled upward to disengage from the limiting gear 14. After the limiting tooth block 17 is pulled upward, the clamping rods 22 on both sides of the fixing block 16 are clamped in the clamping grooves 23 above the fixing frame 15 under the support of the springs 21, thereby fixing the rising limiting tooth block 17 to prevent the rotating rod 7 from rotating. The lowering of the limit tooth block 17 affects the operation. By setting the fixed block 16 and the fixed frame 15 as a sliding connection, not only the friction between the fixed frame 15 and the fixed block 16 can be reduced, but also the fixed block 16 can be conveniently driven to drive the limit tooth block 17 to rise and fall, and the fixed block 16 can be prevented from falling off the fixed frame 15. One end of the clamping rod 22 is set to a cone, which can make it easier for the clamping rod 22 to engage and separate with the clamping groove 23. Through the setting of the connecting frame 24, the first fixing plate 25, the second fixing plate 26 and the hydraulic cylinder 27, the two connecting frames 24 can be pushed out and extended from the second support frame 3 by starting multiple hydraulic cylinders 27 at the same time, so that the overall length of the second support frame 3 can be adjusted according to the use requirements of the deep foundation pit to increase the support range and improve the diversity of use.

[0036] In this embodiment, Figure 1 , Figure 5 and Figure 6As shown, multiple reinforcement blocks 28 are fixedly installed on the top and bottom of the second support frame 3, multiple reinforcement ribs 29 are fixedly installed between the multiple reinforcement blocks 28, a second support seat 30 is installed on the ground through multiple fixing bolts on one side of the first support seat 4, multiple second support blocks 31 are fixedly installed on the second support seat 30 and the first support seat 4, and anchor cables 32 are fixedly installed between multiple opposing second support blocks 31. Through the arrangement of the reinforcement blocks 28 and the reinforcement ribs 29, the overall structural strength of the second support frame 3 can be increased, so that the two connecting frames 24 can still be stably supported after being extended to prevent breakage, and through the arrangement of the second support seat 30, the second support block 31 and the anchor cables 32, the second support seat 30 and the multiple anchor cables 32 are arranged on one side of the first support seat 4, so that the first support seat 4 can be further supported and stabilized, so as to improve the firmness of the support of the inner wall of the deep foundation pit by the combination of the pile row 1, the first support frame 2, the second support frame 3 and the first support seat 4.

[0037] In this embodiment, if Figure 1-Figure 6 As shown, the working process of a deep foundation pit support structure and a support method thereof provided in this embodiment is as follows:

[0038] Step 1: After the deep foundation pit is excavated, a plurality of rows of piles 1 are driven into the deep foundation pit and are closely attached to the inner wall of the deep foundation pit;

[0039] Step 2, place the first support frame 2 on one side of the plurality of pile rows 1, then put the plurality of clamping members 12 on the first support frame 2 on the plurality of pile rows 1, then rotate the rotating rod 7 to drive the screw 8 to rotate through the plurality of bevel gears 9, the screw 8 rotates to drive the moving block 10 to move through the thread, so that the two moving blocks 10 drive the two clamping members 12 to approach each other through the first support block 11 and clamp them on the pile row 1 for fixing;

[0040] Step 3, then, the first support seat 4 is set up and fixed on the ground of the deep foundation pit by using a plurality of fixing bolts, and then a plurality of second support frames 3 are arranged between the first support frame 2 and the first support seat 4, and the two connecting frames 24 on the second support frame 3 are connected and fixed with the first support frame 2 and the first support seat 4 by using a plurality of bolts, so that the first support frame 2, the second support frame 3 and the first support seat 4 are combined to support and fix the plurality of pile rows 1;

[0041] Step 4: Use multiple fixing bolts on one side of the first support seat 4 to set up the second support seat 30 on the ground of the deep foundation pit, and then install multiple anchor cables 32 between the first support seat 4 and the second support seat 30 to further stabilize the first support seat 4 to complete the installation of the deep foundation pit support structure.

[0042] In summary, in this embodiment, according to a deep foundation pit supporting structure and supporting method thereof of this embodiment, by setting a push rod 13, after a plurality of push rods 13 are evenly set on the rotating rod 7, it is more convenient to push the rotating rod 7 to rotate, so as to facilitate the operation of the staff, and the setting of the rubber pad can not only increase the friction force on the surface of the push rod 13, but also protect the palm of the staff during operation. By setting the limiting gear 14, the fixing frame 15, the fixing block 16 and the limiting tooth block 17, after the rotating rotating rod 7 drives the two clamping members 12 to clamp on the pile row 1, one end of the limiting tooth block 17 is meshed with the limiting gear 14. Since the limiting tooth block 17 is installed and supported by the fixing frame 15 and the fixing block 16, the limiting tooth block 1 After the engagement of the limit gear 14 with the rotating rod 7, the rotating rod 7 can be fixed as a whole to prevent the rotating rod 7 from rotating when hit by a stone and causing the clamping member 12 to loosen. By setting one end of the limit gear block 17 to a cone, the contact range of one end of the limit gear block 17 is reduced, so that it can be more conveniently inserted into the limit gear 14 for engagement. The setting of the pressing block 18 and the anti-slip pattern 19 can increase the friction force on the surface of the limit gear block 17, which is convenient for the staff to pull it. Through the setting of the groove 20, the spring 21, the clamping rod 22 and the clamping groove 23, a plurality of clamping grooves 23 are provided on the fixing frame 15. After the limit gear block 17 and the limit gear 14 are engaged, the clamping rods 22 on both sides of the fixing block 16 are clamped in the clamping grooves 23 under the support of the spring 21, which can further The limit tooth block 17 is reinforced to make the meshing of the limit tooth block 17 and the limit gear 14 more stable. When the rotating rod 7 needs to be operated to rotate, the limit tooth block 17 is pulled upward to disengage from the limit gear 14. After the limit tooth block 17 is pulled upward, the clamping rods 22 on both sides of the fixing block 16 are clamped with the clamping grooves 23 located above the fixing frame 15 under the support of the spring 21, thereby fixing the rising limit tooth block 17 to prevent the limit tooth block 17 from falling and affecting the operation when the rotating rod 7 is rotated. By setting the fixing block 16 and the fixing frame 15 as a sliding connection, not only can the friction between the fixing frame 15 and the fixing block 16 be reduced, which makes it convenient for the fixing block 16 to drive the limit tooth block 17 to rise and fall, but also can prevent the fixing block 16 from falling from the fixing frame 15. The fixed frame 15 falls off, and one end of the clamping rod 22 is set to a cone shape, which can make it easier for the clamping rod 22 to engage and separate with the clamping groove 23. By setting the connecting frame 24, the first fixing plate 25, the second fixing plate 26 and the hydraulic cylinder 27, the two connecting frames 24 can be pushed out and extended from the second support frame 3 by starting multiple hydraulic cylinders 27 at the same time, so that the overall length of the second support frame 3 can be adjusted according to the use requirements of the deep foundation pit to increase the support range and improve the diversity of use. By setting the reinforcing block 28 and the reinforcing rib 29, the overall structural strength of the second support frame 3 can be increased, so that the two connecting frames 24 can still be stably supported after being extended to prevent breakage. By setting the second support seat 30, the second support block 31 and the anchor cable 32,A second support seat 30 and a plurality of anchor cables 32 are arranged on one side of the first support seat 4, which can further support and stabilize the first support seat 4, thereby improving the firmness of the support of the inner wall of the deep foundation pit by the combination of the pile row 1, the first support frame 2, the second support frame 3 and the first support seat 4.

[0043] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0044] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0045] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A deep foundation pit support structure, comprising a pile row (1), a first support frame (2) being arranged on one side of the pile row (1), a plurality of second support frames (3) being arranged on one side of the first support frame (2), a first support seat (4) being arranged on one side of the plurality of second support frames (3), characterized in that: The first support frame (2) is provided with a clamping connection structure (5), and the clamping connection structure (5) comprises a plurality of fixed frames (6) fixedly mounted on the surface of the first support frame (2), a rotating rod (7) movably mounted on the fixed frame (6), two screw rods (8) symmetrically and movably mounted inside the fixed frame (6), one end of each of the rotating rod (7) and the screw rod (8) being fixedly mounted with mutually meshing bevel gears (9), a moving block (10) rotatably connected via a thread is provided on the screw rod (8), a first supporting block (11) is fixedly mounted on one side of the moving block (10), and a clamping member (12) is fixedly mounted on one end of the first supporting block (11).

2. A deep foundation pit support structure according to claim 1, characterized in that: A plurality of push rods (13) are evenly and fixedly mounted on the top of the rotating rod (7), and a rubber pad is fixedly sleeved on the push rods (13).

3. A deep foundation pit support structure according to claim 1, characterized in that: A limit gear (14) is fixedly mounted on the rotating rod (7); a plurality of fixing frames (15) are symmetrically fixedly mounted on the surface of the fixing frame (6); a fixing block (16) is arranged on the fixing frame (15); and a limit tooth block (17) meshing with the limit gear (14) is fixedly mounted on one end of the fixing block (16).

4. A deep foundation pit support structure according to claim 3, characterized in that: One end of the limiting tooth block (17) is arranged in a cone shape, a plurality of pressing blocks (18) are fixedly mounted on the surface of the limiting tooth block (17), and the surface of the pressing block (18) is provided with anti-slip grooves (19).

5. A deep foundation pit support structure according to claim 4, characterized in that: The fixing block (16) is provided with a plurality of grooves (20), a spring (21) is fixedly installed inside the groove (20), a clamping rod (22) is fixedly installed at one end of the spring (21), and the fixing frame (15) is provided with a plurality of clamping grooves (23) that are mutually engaged with the clamping rod (22).

6. A deep foundation pit support structure according to claim 5, characterized in that: The fixing block (16) is slidably connected to the fixing frame (15), and one end of the clamping rod (22) is configured to be conical.

7. A deep foundation pit support structure according to claim 1, characterized in that: Two connecting frames (24) are movably installed inside the second support frame (3) and are connected to the first support frame (2) and the first support seat (4) by a plurality of bolts; first fixing plates (25) are fixedly installed on both sides of the second support frame (3); second fixing plates (26) are fixedly installed on both sides of the connecting frame (24); and a hydraulic cylinder (27) is fixedly installed between the first fixing plate (25) and the second fixing plate (26).

8. A deep foundation pit support structure according to claim 1, characterized in that: A plurality of reinforcing blocks (28) are fixedly mounted on the top and bottom of the second support frame (3), and a plurality of reinforcing ribs (29) are fixedly mounted between the plurality of reinforcing blocks (28).

9. A deep foundation pit support structure according to claim 1, characterized in that: A second support seat (30) is provided on one side of the first support seat (4) and is mounted on the ground via a plurality of fixing bolts; a plurality of second support blocks (31) are fixedly mounted on the second support seat (30) and the first support seat (4); and anchor cables (32) are fixedly mounted between the plurality of opposing second support blocks (31).

10. A method for supporting a deep foundation pit support structure according to claim 1, characterized in that: The following steps are involved: S1. After the deep foundation pit is excavated, a plurality of rows of piles (1) are driven into the deep foundation pit and are closely attached to the inner wall of the deep foundation pit; S2, placing the first support frame (2) on one side of the plurality of pile rows (1), then firstly putting the plurality of clamping members (12) on the first support frame (2) on the plurality of pile rows (1), then rotating the rotating rod (7) to drive the screw rod (8) to rotate through the plurality of bevel gears (9), and the screw rod (8) rotates to drive the moving block (10) to move through the thread, so that the two moving blocks (10) drive the two clamping members (12) to approach each other and clamp on the pile row (1) to be fixed through the first support block (11); S3, then, on the ground of the deep foundation pit, a first support seat (4) is set up and fixed by means of a plurality of fixing bolts, and then a plurality of second support frames (3) are arranged between the first support frame (2) and the first support seat (4), and two connecting frames (24) on the second support frame (3) are connected and fixed to the first support frame (2) and the first support seat (4) by means of a plurality of bolts, so that the first support frame (2), the second support frame (3) and the first support seat (4) are combined to support and fix the plurality of pile rows (1); S4. A plurality of fixing bolts are used on one side of the first support seat (4) to set up the second support seat (30) on the ground of the deep foundation pit, and then a plurality of anchor cables (32) are installed between the first support seat (4) and the second support seat (30) to further stabilize the first support seat (4), thereby completing the installation of the deep foundation pit support structure.

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