Supporting structure for deep foundation pit construction and operation method

Abstract

This invention discloses a support structure and operation method for deep foundation pit construction, including a deep foundation pit body. A support device is provided on the deep foundation pit body. The support device includes a main board mechanism, an installation mechanism, an adjustment mechanism, and an auxiliary mechanism. The main board mechanism is equipped with an installation mechanism. The method involves aligning a first through hole and a second through hole, and screwing a limiting rod into the first and second through holes to fix a slider into a sliding groove. The support plate pulls a fixing plate, and the fixing plate pulls a telescopic rod via a rotating shaft to adapt to the width of the deep foundation pit body. A new sliding groove is inserted into the top of the fixing plate located inside the deep foundation pit body. The installation through hole on the new sliding groove is aligned with the installation through hole on the fixing plate, and the fixing rod is screwed into the installation through hole, thereby fixing the two support plates together, improving the stability of the entire device, and also achieving convenient adjustment of the support plate height.

Description

Technical Field

[0001] This invention relates to the field of deep pit construction support devices. Background Technology

[0002] Construction refers to the production activities during the implementation phase of a project. It is the process of building various types of structures, or the process of turning the lines on design drawings into a physical object at a designated location. It includes foundation construction, main structure construction, roofing construction, and decoration construction. The site where construction work takes place is called the "construction site" or "building site."

[0003] Construction is a production activity carried out by people using various building materials and machinery according to specific design blueprints within a certain space and time to build various types of architectural products. It includes the entire production process from construction preparation and groundbreaking to project completion and acceptance. This process involves construction preparation, construction organization design and management, earthwork engineering, blasting engineering, foundation engineering, reinforcement engineering, formwork engineering, scaffolding engineering, concrete engineering, prestressed concrete engineering, masonry engineering, steel structure engineering, timber structure engineering, and structural installation engineering, among other tasks.

[0004] When working inside a deep pit, it is necessary to support the soil walls on both sides of the pit. One method is to use support plates close to the soil walls on both sides and fix them to the outer walls of the two support plates with the two ends of the support rods. However, this method of support can only meet the needs of pits with a fixed depth and width. Once the width and depth of the pit change, the support plates need to be re-supported, making the support of the soil walls on both sides time-consuming, laborious and very inconvenient. Summary of the Invention

[0005] The purpose of this invention is to overcome the drawback of the inconvenience of adjusting the support plate and to provide a support structure and operation method for deep foundation pit construction.

[0006] The technical solution to achieve the above objective is: a support structure for deep foundation pit construction, comprising a deep foundation pit body, a support device provided on the deep foundation pit body, the support device comprising a main board mechanism, an installation mechanism, an adjustment mechanism and an auxiliary mechanism, the main board mechanism being provided with an installation mechanism, the installation mechanism being installed with an adjustment mechanism, and the outer wall of the main board mechanism being installed with an auxiliary mechanism.

[0007] Preferably, the motherboard mechanism includes a support plate, a plug, a slot, and a groove. The top of the support plate is fixedly connected to the plug, the bottom of the support plate has a slot, and the outer wall of the support plate has a groove.

[0008] Preferably, the installation mechanism includes a fixed plate, a sliding groove, a slider, a first through hole, a second through hole, a limiting rod, a mounting through hole, and a fixing rod. Two symmetrically distributed fixed plates are fixedly connected to the outer walls of both support plates. A sliding groove is formed on the outer wall of each fixed plate. Two arrayed second through holes are formed on the outer wall of each sliding groove. Two sliders are slidably connected to the inner wall of each sliding groove. A first through hole is formed on the outer wall of each slider. Two symmetrically distributed mounting through holes are formed at the upper and lower ends of the outer wall of each sliding groove. A fixing rod is threadedly connected to the inner wall of each mounting through hole, and a limiting rod is threadedly connected to the inner wall of each second through hole.

[0009] Preferably, the adjustment mechanism includes a rotating shaft, a limiting insertion hole, a limiting screw, a telescopic rod, an adjustment hole, and an adjustment rod. The inner wall of the slider is rotatably connected to the rotating shaft. The outer wall of the rotating shaft and the upper end of the slider are both provided with limiting insertion holes. The inner wall of the limiting insertion hole is threadedly connected to the limiting screw. The two ends of the telescopic rod are respectively fixedly connected to two rotating shafts. The outer wall of the telescopic rod is provided with multiple adjustment holes. The inner wall of the adjustment hole is threadedly connected to the adjustment rod.

[0010] Preferably, the auxiliary mechanism includes a square box, a support rod, a baffle, a fixing block, a pedal, a square hole, a limiting block, and a square rod. Two square boxes stacked in a distributed manner are fixedly connected to the outer wall of the support plate. Multiple fixing blocks are fixedly connected to the outer wall of the support plate. A pedal is rotatably connected to the outer wall of the fixing block. A support rod is slidably connected to the upper end of the square box. Multiple baffles are fixedly connected to the outer wall of the support rod. A square hole is opened on the outer wall of the support rod. A limiting block is fixedly connected to the outer wall of the support plate. A square rod is slidably connected to the inner wall of the limiting block.

[0011] Preferably, the baffle corresponds one-to-one with the pedal, the baffle is located directly below the pedal, the outer wall of the square rod passes through the limiting block, and the upper end of the pedal is provided with anti-slip texture.

[0012] Preferably, the bottom end of the groove passes through the bottom end of the fixing plate.

[0013] Preferably, the lateral length of the top end of the fixing plate is equal to the inner length of the groove.

[0014] A method for constructing a support structure for deep foundation pits includes the following steps:

[0015] S1: First, pull the square rod out of the square hole, push the support rod downward, and move the support rod into the bottom of the square box. The support rod drives the baffle to move, so that the pedal can be rotated and placed down, making it convenient for workers to go down into the deep foundation pit. After they are down, simply push the support rod upward to align the square hole with the square rod, so that the square rod can be inserted into the square hole to fix the support rod. At the same time, push the baffle upward to rotate the pedal upward and retract the pedal to reduce the space occupied.

[0016] S2: Next, attach the two support plates to the two side walls of the deep foundation pit body respectively. At this time, align the first through hole and the second through hole, and screw the limit rod into the first through hole and the second through hole to fix the slider into the slide groove. The support plate will pull the fixing plate, and the fixing plate will pull the telescopic rod through the rotating shaft to adapt to the width of the deep foundation pit body. At this time, pull the telescopic rod to a horizontal state to make the telescopic rod taut. At this time, screw the limit screw into the limit hole to fix the rotating shaft and the slider to limit the rotation of the rotating shaft. Then screw the adjusting rod into the adjusting hole to fix the telescopic rod, so that the support plate supports the side wall of the deep foundation pit body.

[0017] S3: Then, when the depth of the deep foundation pit increases and it is necessary to add support devices upward, first dig down to the bottom of the deep foundation pit. At this time, the bottom of the deep foundation pit is 10cm away from the required depth. Then, dig the bottom of the deep foundation pit with one of the support plates to the required depth. Then, unscrew the adjusting rod on the telescopic rod so that the telescopic rod can extend and retract freely. Press down on one of the support plates so that the support plate can move down to the bottom of the deep foundation pit. At the same time, the support plate on one side pulls the slider through the fixed plate to tilt the telescopic rod. Then repeat the above operation to move the other support plate to the required depth of the deep foundation pit, which is convenient for moving the support device.

[0018] S4: Finally, insert the new support device into the upper part of the support device already located inside the deep foundation pit body. That is, insert the groove at the bottom of the new support plate into the insert block at the top of the support plate inside the deep foundation pit body to form a preliminary fixation. At the same time, insert the new sliding groove into the top of the fixed plate inside the deep foundation pit body. Align the mounting through hole on the new sliding groove with the mounting through hole on the fixed plate, and screw the fixing rod threaded into the mounting through hole to fix the two support plates together, thereby improving the stability of the entire device and also achieving the effect of conveniently adjusting the height of the support plate.

[0019] The beneficial effects of this invention are:

[0020] 1) Place the two support plates against the two side walls of the deep foundation pit body respectively. At this time, align the first and second through holes, and screw the limiting rod into the first and second through holes to fix the slider into the groove. The support plate will pull the fixing plate, and the fixing plate will pull the telescopic rod through the rotating shaft to adapt to the width of the deep foundation pit body. Then, pull the telescopic rod to a horizontal state to make the telescopic rod taut. Then, screw the limiting screw into the limiting hole to fix the rotating shaft and the slider to limit the rotation of the rotating shaft. Then, screw the adjusting rod into the adjusting hole to fix the telescopic rod, so that the support plate supports the side wall of the deep foundation pit body.

[0021] 2) When the depth of the deep foundation pit increases and additional support devices are needed, first excavate the bottom of the deep foundation pit. At this point, the bottom of the deep foundation pit should be at the required depth (cm). Then, excavate the bottom of the deep foundation pit, located on one side of the support plate, to the required depth. Next, unscrew the adjusting rod on the telescopic rod to allow it to extend and retract freely. Press down on one side of the support plate to move it to the bottom of the deep foundation pit. Simultaneously, the support plate on one side pulls the slider via the fixed plate, tilting the telescopic rod. Repeat the above steps. Move the other support plate to the required depth of the deep foundation pit body to facilitate the movement of the support device. Insert the new support device into the upper end of the support device already located in the deep foundation pit body. That is, insert the groove at the bottom of the new support plate into the insert block at the top of the support plate located in the deep foundation pit body to form a preliminary fixation. At the same time, insert the new sliding groove into the top of the fixed plate located in the deep foundation pit body. Align the mounting through hole on the new sliding groove with the mounting through hole on the fixed plate. Screw the fixing rod into the mounting through hole to fix the two support plates together, thereby improving the stability of the entire device and also achieving the effect of convenient adjustment of the support plate height.

[0022] 3) Pull the square rod out of the square hole, push the support rod downwards, and move the support rod into the bottom of the square box. The support rod drives the baffle to move, so that the pedal can be rotated and placed down, making it convenient for workers to go down into the deep foundation pit. After going down, simply push the support rod upwards to align the square hole with the square rod, so that the square rod can be inserted into the square hole to fix the support rod. At the same time, push the baffle upwards to rotate the pedal upwards and retract the pedal to reduce the space occupied. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the state-one structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the second state structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the support device structure of the present invention;

[0026] Figure 4 This is a bottom view of the support device of the present invention;

[0027] Figure 5 This is an exploded structural diagram of the present invention;

[0028] Figure 6 yes Figure 3 Enlarged structural diagram at point A;

[0029] Figure 7 yes Figure 4 Enlarged structural diagram at point B;

[0030] Figure 8 yes Figure 5 Enlarged structural diagram at point C;

[0031] Figure 9 yes Figure 1 A magnified structural diagram at point D.

[0032] 1. Deep foundation pit body; 2. Main board mechanism; 201. Support plate; 202. Insert block; 203. Slot; 204. Groove; 3. Mounting mechanism; 301. Fixing plate; 302. Slide groove; 303. Slider; 304. First through hole; 305. Second through hole; 306. Limiting rod; 307. Mounting through hole; 308. Fixing rod; 4. Adjustment mechanism; 401. Rotating shaft; 402. Limiting insertion hole; 403. Limiting screw; 404. Telescopic rod; 405. Adjusting hole; 406. Adjusting rod; 5. Auxiliary mechanism; 501. Square box; 502. Support rod; 503. Baffle; 504. Fixing block; 505. Pedal; 506. Square hole; 507. Limiting block; 508. Square rod. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] Reference Appendix Figure 1-9 A support structure and operation method for deep foundation pit construction includes a deep foundation pit body 1, a support device is provided on the deep foundation pit body 1, the support device includes a main body mechanism 2, an installation mechanism 3, an adjustment mechanism 4 and an auxiliary mechanism 5, the main body mechanism 2 is provided with the installation mechanism 3, the installation mechanism 3 is installed with the adjustment mechanism 4, and the auxiliary mechanism 5 is installed on the outer wall of the main body mechanism 2.

[0036] The motherboard mechanism 2 includes a support plate 201, a plug 202, a slot 203, and a groove 204. The top of the support plate 201 is fixedly connected to the plug 202, the bottom of the support plate 201 is provided with a slot 203, and the outer wall of the support plate 201 is provided with a groove 204.

[0037] The mounting mechanism 3 includes a fixed plate 301, a sliding groove 302, a slider 303, a first through hole 304, a second through hole 305, a limiting rod 306, a mounting through hole 307, and a fixing rod 308. Two symmetrically distributed fixed plates 301 are fixedly connected to the outer walls of the two support plates 201. The outer wall of the fixed plate 301 is provided with a sliding groove 302. The outer wall of the sliding groove 302 is provided with two arrayed second through holes 305. Two sliders 303 are slidably connected to the inner wall of the sliding groove 302. The outer wall of the slider 303 is provided with a first through hole 304. The upper and lower ends of the outer wall of the sliding groove 302 are provided with two symmetrically distributed mounting through holes 307. The inner wall of the mounting through hole 307 is threaded with a fixing rod 308. The inner wall of the second through hole 305 is threaded with a limiting rod 306. The bottom end of the sliding groove 302 passes through the bottom end of the fixed plate 301. The lateral length of the top end of the fixed plate 301 is equal to the inner length of the sliding groove 302.

[0038] Reference Appendix Figure 3-8 The adjustment mechanism 4 includes a rotating shaft 401, a limiting insertion hole 402, a limiting screw 403, a telescopic rod 404, an adjustment hole 405, and an adjustment rod 406. The inner wall of the slider 303 is rotatably connected to the rotating shaft 401. The outer wall of the rotating shaft 401 and the upper end of the slider 303 are both provided with limiting insertion holes 402. The inner wall of the limiting insertion hole 402 is threadedly connected to the limiting screw 403. The two ends of the telescopic rod 404 are fixedly connected to the two rotating shafts 401 respectively. The outer wall of the telescopic rod 404 is provided with multiple adjustment holes 405. The inner wall of the adjustment hole 405 is threadedly connected to the adjustment rod 406.

[0039] Two support plates 201 are attached to the two side walls of the deep foundation pit body 1 respectively. At this time, the first through hole 304 and the second through hole 305 are aligned, and the limiting rod 306 is screwed into the first through hole 304 and the second through hole 305 to fix the slider 303 into the slide groove 302. The support plate 201 will pull the fixing plate 301, and the fixing plate 301 will pull the telescopic rod 404 through the rotating shaft 401 to adapt to the width of the deep foundation pit body 1. At this time, the telescopic rod 404 is pulled to a horizontal state to make the telescopic rod 404 taut. At this time, the limiting screw 403 is screwed into the limiting hole 402 to fix the rotating shaft 401 and the slider 303 to limit the rotation of the rotating shaft 401. Then, the adjusting rod 406 is screwed into the adjusting hole 405 to fix the telescopic rod 404, so that the support plate 201 supports the side wall of the deep foundation pit body 1.

[0040] When the depth of the deep foundation pit body 1 is increased, and it is necessary to add support devices upward, first dig down to the bottom of the deep foundation pit body 1. At this time, the bottom of the deep foundation pit body 1 is 10cm away from the required depth. Then, dig the bottom of the deep foundation pit body 1 with the support plate 201 on one side to the required depth. Then, unscrew the adjusting rod 406 on the telescopic rod 404 so that the telescopic rod 404 can extend and retract freely, pressing down on the support plate 201 on one side, so that the support plate 201 can move down to the bottom of the deep foundation pit body 1. At the same time, the support plate 201 on one side pulls the slider 303 through the fixing plate 301, so that the telescopic rod 404 is in an inclined state. Then repeat the above operation to move the support plate 201 on the other side to the required depth of the deep foundation pit body 1, so as to facilitate the movement of the support device.

[0041] The new support device is inserted into the upper end of the support device already located inside the deep foundation pit body 1. Specifically, the groove 204 at the bottom of the new support plate 201 is inserted into the insert block 202 at the upper end of the support plate 201 inside the deep foundation pit body 1 to form a preliminary fixation. At the same time, the new sliding groove 302 is inserted into the top of the fixing plate 301 inside the deep foundation pit body 1. The mounting through hole 307 on the new sliding groove 302 is aligned with the mounting through hole 307 on the fixing plate 301. The fixing rod 308 is screwed into the mounting through hole 307 to fix the two support plates 201 together, thereby improving the stability of the entire device and also achieving the effect of conveniently adjusting the height of the support plate 201.

[0042] Reference Appendix Figure 4-7 The auxiliary mechanism 5 includes a square box 501, a support rod 502, a baffle 503, a fixing block 504, a pedal 505, a square hole 506, a limiting block 507, and a square rod 508. Two square boxes 501 stacked together are fixedly connected to the outer wall of the support plate 201. Multiple fixing blocks 504 are fixedly connected to the outer wall of the support plate 201. The pedal 505 is rotatably connected to the outer wall of the fixing block 504. The support rod 502 is slidably connected to the upper end of the square box 501. Multiple baffles 503 are fixedly connected to the outer wall of the support rod 502. A square hole 506 is opened on the outer wall of the support rod 502. The limiting block 507 is fixedly connected to the outer wall of the support plate 201. The square rod 508 is slidably connected to the inner wall of the limiting block 507. The baffle 503 corresponds to the pedal 505 one by one. The baffle 503 is located directly below the pedal 505. The outer wall of the square rod 508 passes through the limiting block 507. The upper end of the pedal 505 is provided with anti-slip texture.

[0043] Pull the square rod 508 out of the square hole 506, push the support rod 502 downward, and move the support rod 502 into the bottom of the square box 501. The support rod 502 drives the baffle 503 to move, so that the pedal 505 can be rotated and placed down, making it convenient for workers to go down into the deep foundation pit body 1. After coming down, simply push the support rod 502 upward, so that the square hole 506 is aligned with the square rod 508, and insert the square rod 508 into the square hole 506 to fix the support rod 502. At the same time, the baffle 503 pushes the pedal 505 upward, so that the pedal 505 rotates upward and is retracted to reduce the space occupied.

[0044] A method for constructing a support structure for deep foundation pits includes the following steps:

[0045] S1: First, pull the square rod 508 out of the square hole 506, push the support rod 502 downward, and move the support rod 502 into the bottom of the square box 501. The support rod 502 drives the baffle 503 to move, so that the pedal 505 can be rotated and placed down, making it convenient for workers to go down into the deep foundation pit body 1. After coming down, simply push the support rod 502 upward, so that the square hole 506 is aligned with the square rod 508, and insert the square rod 508 into the square hole 506 to fix the support rod 502. At the same time, the baffle 503 pushes the pedal 505 upward, so that the pedal 505 rotates upward and is retracted to reduce the space occupied.

[0046] S2: Next, attach the two support plates 201 to the two side walls of the deep foundation pit body 1 respectively. At this time, align the first through hole 304 and the second through hole 305, and screw the limiting rod 306 into the first through hole 304 and the second through hole 305 to fix the slider 303 into the slide groove 302. The support plate 201 will pull the fixing plate 301, and the fixing plate 301 will pull the telescopic rod 404 through the rotating shaft 401 to adapt to the width of the deep foundation pit body 1. At this time, pull the telescopic rod 404 to a horizontal state so that the telescopic rod 404 is in a taut state. At this time, screw the limiting screw 403 into the limiting hole 402 to fix the rotating shaft 401 and the slider 303 to limit the rotation of the rotating shaft 401. Then screw the adjusting rod 406 into the adjusting hole 405 to fix the telescopic rod 404, so that the support plate 201 supports the side wall of the deep foundation pit body 1.

[0047] S3: Then, when the depth of the deep foundation pit body 1 increases, and it is necessary to add support devices upward, first dig down to the bottom of the deep foundation pit body 1. At this time, the bottom of the deep foundation pit body 1 is 10cm away from the required depth. Then, dig the bottom of the deep foundation pit body 1 of the support plate 201 on one side to the required depth of the bottom of the deep foundation pit body 1. Then, unscrew the adjusting rod 406 on the telescopic rod 404 so that the telescopic rod 404 can extend and retract freely, and press down on the support plate 201 on one side so that the support plate 201 can move down to the bottom of the deep foundation pit body 1. At the same time, the support plate 201 on one side pulls the slider 303 through the fixing plate 301 so that the telescopic rod 404 is in an inclined state. Then repeat the above operation to move the other support plate 201 to the required depth of the deep foundation pit body 1, so as to facilitate the movement of the support device.

[0048] S4: Finally, insert the new support device into the upper end of the support device already located inside the deep foundation pit body 1. That is, insert the groove 204 at the bottom of the new support plate 201 into the insert block 202 at the upper end of the support plate 201 inside the deep foundation pit body 1 to form a preliminary fixation. At the same time, insert the new sliding groove 302 into the top of the fixing plate 301 inside the deep foundation pit body 1. Align the mounting through hole 307 on the new sliding groove 302 with the mounting through hole 307 on the fixing plate 301. Screw the fixing rod 308 into the mounting through hole 307 to fix the two support plates 201 together, thereby improving the stability of the entire device and also achieving the effect of conveniently adjusting the height of the support plate 201.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions 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 support structure for deep foundation pit construction, comprising a deep foundation pit body (1), characterized in that, The deep foundation pit body (1) is provided with a support device, which includes a main board mechanism (2), an installation mechanism (3), an adjustment mechanism (4) and an auxiliary mechanism (5). The main board mechanism (2) is provided with an installation mechanism (3), the installation mechanism (3) is installed with an adjustment mechanism (4), and the auxiliary mechanism (5) is installed on the outer wall of the main board mechanism (2). The main board mechanism (2) includes a support plate (201), a plug (202), a slot (203) and a groove (204). The top of the support plate (201) is fixedly connected to the plug (202), the bottom of the support plate (201) is provided with a slot (203), and the outer wall of the support plate (201) is provided with a groove (204). The installation mechanism (3) includes a fixed plate (301), a sliding groove (302), a slider (303), a first through hole (304), a second through hole (305), a limiting rod (306), an installation through hole (307), and a fixing rod (308). The outer walls of the two support plates (201) are fixedly connected to two symmetrically distributed fixed plates (301). The outer wall of the fixed plate (301) is provided with a sliding groove (302). The outer wall of the sliding groove (302) is provided with two arrayed second through holes (305). The inner wall of the sliding groove (302) is slidably connected to two sliders (303). The outer wall of the slider (303) is provided with a first through hole (304). The upper and lower ends of the outer wall of the sliding groove (302) are provided with two symmetrically distributed installation through holes (307). The inner wall of the installation through hole (307) is threadedly connected to a fixing rod (308). The inner wall of the second through hole (305) is threadedly connected to a limiting rod (306). The adjustment mechanism (4) includes a rotating shaft (401), a limiting insertion hole (402), a limiting screw (403), a telescopic rod (404), an adjustment hole (405), and an adjustment rod (406). The inner wall of the slider (303) is rotatably connected to the rotating shaft (401). The outer wall of the rotating shaft (401) and the upper end of the slider (303) are both provided with limiting insertion holes (402). The inner wall of the limiting insertion hole (402) is threadedly connected to the limiting screw (403). The two ends of the telescopic rod (404) are respectively fixedly connected to the two rotating shafts (401). The outer wall of the telescopic rod (404) is provided with multiple adjustment holes (405). The inner wall of the adjustment hole (405) is threadedly connected to the adjustment rod (406). The auxiliary mechanism (5) includes a square box (501), a support rod (502), a baffle (503), a fixing block (504), a pedal (505), a square hole (506), a limiting block (507), and a square rod (508). Two symmetrically distributed square boxes (501) are fixedly connected to the outer wall of the support plate (201). Multiple fixing blocks (504) are fixedly connected to the outer wall of the support plate (201). A pedal (505) is rotatably connected to the outer wall of the fixing block (504). The upper end of the square box (501) is slidably connected to the support rod (502). Multiple baffles (503) are fixedly connected to the outer wall of the support rod (502). A square hole (506) is opened on the outer wall of the support rod (502). A limiting block (507) is fixedly connected to the outer wall of the support plate (201). A square rod (508) is slidably connected to the inner wall of the limiting block (507).

2. The support structure for deep foundation pit construction according to claim 1, characterized in that, The baffle (503) corresponds to the pedal (505) one by one. The baffle (503) is located directly below the pedal (505). The outer wall of the square rod (508) passes through the limiting block (507). The upper end of the pedal (505) is provided with anti-slip texture.

3. The support structure for deep foundation pit construction according to claim 1, characterized in that, The bottom end of the groove (302) passes through the bottom end of the fixing plate (301).

4. The support structure for deep foundation pit construction according to claim 1, characterized in that, The top transverse length of the fixed plate (301) is equal to the inner length of the groove (302).

5. A method for constructing a deep foundation pit using the support structure described in claim 1, characterized in that, Includes the following steps: S1: First, pull the square rod (508) out of the square hole (506), push the support rod (502) downward, and move the support rod (502) into the bottom of the square box (501). The support rod (502) drives the baffle (503) to move, so that the pedal (505) can be rotated and placed down, making it convenient for workers to go down into the deep pit body (1). After coming down, just push the support rod (502) upward, so that the square hole (506) is aligned with the square rod (508), and insert the square rod (508) into the square hole (506) to fix the support rod (502). At the same time, the baffle (503) pushes the pedal (505) upward, so that the pedal (505) rotates upward and is retracted to reduce the space occupied. S2: Next, attach the two support plates (201) to the two side walls of the deep pit body (1) respectively. At this time, align the first through hole (304) and the second through hole (305), and screw the limiting rod (306) into the first through hole (304) and the second through hole (305) to fix the slider (303) into the slide groove (302). The support plate (201) will pull the fixing plate (301), and the fixing plate (301) will pull the telescopic rod (404) through the rotating shaft (401) to adapt to the deep pit. The width of the foundation pit body (1) is then adjusted. At this time, the telescopic rod (404) is pulled into a horizontal state so that the telescopic rod (404) is in a taut state. At this time, the limiting screw (403) is screwed into the limiting socket (402) so that the rotating shaft (401) and the slider (303) are fixed to limit the rotation of the rotating shaft (401). Then, the adjusting rod (406) is screwed into the adjusting hole (405) to fix the telescopic rod (404) so ​​that the support plate (201) supports the side wall of the deep foundation pit body (1). S3: Then, when the depth of the deep foundation pit body (1) increases, and it is necessary to add support devices upward, first dig down the bottom of the deep foundation pit body (1). At this time, the bottom of the deep foundation pit body (1) is 10cm away from the required depth. Then, dig the bottom of the deep foundation pit body (1) of the support plate (201) on one side to the required depth of the bottom of the deep foundation pit body (1). Then, unscrew the adjusting rod (406) on the telescopic rod (404) so ​​that the telescopic rod (404) can extend and retract freely. Press down on the support plate (201) on one side so that the support plate (201) can move down to the bottom of the deep foundation pit body (1). At the same time, the support plate (201) on one side pulls the slider (303) through the fixed plate (301) so that the telescopic rod (404) is in an inclined state. Then repeat the above operation so that the support plate (201) on the other side can be moved into the required depth of the deep foundation pit body (1) to facilitate the movement of the support device. S4: Finally, insert the new support device into the upper end of the support device already located in the deep foundation pit body (1), that is, insert the slot (203) at the bottom of the new support plate (201) into the insert block (202) at the upper end of the support plate (201) located in the deep foundation pit body (1) to form a preliminary fixation. At the same time, insert the new slide (302) into the top of the fixing plate (301) located in the deep foundation pit body (1), align the mounting through hole (307) on the new slide (302) with the mounting through hole (307) on the fixing plate (301), and screw the fixing rod (308) into the mounting through hole (307) to fix the two support plates (201) together, improve the stability of the entire device, and also achieve the effect of conveniently adjusting the height of the support plate (201).

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