A deep foundation pit support structure

Abstract

The present application discloses a deep foundation pit support structure, which relates to the field of foundation pit support technology, improves the problem of troublesome support of four groove walls of the foundation pit, and includes a foundation pit, a mounting frame, a fixed frame and four groups of support frames, wherein the mounting frame includes a plurality of rotating plates and a plurality of clamping blocks, wherein the rotating plates are rotatably connected to adjacent rotating plates, and the four support frames are respectively arranged at the four corners of the foundation pit; the support frame includes two connecting seats and a support rod, wherein the connecting seat is provided with a connecting plate, wherein the connecting seat is provided with an elastic member, wherein the support rod is provided with a first abutting rod, wherein the first abutting rod is threadedly connected with a second abutting rod; the fixed frame includes a fixed seat and four movable seats arranged at the bottom of the foundation pit, wherein the fixed seat is provided with a mounting member, wherein the movable seat is rotatably connected with a rotating seat, wherein the fixed seat is threadedly connected with a control screw, and wherein the movable seat is provided with a guide inclined surface. The present application can conveniently support the four groove walls of the foundation pit.

Description

Technical Field

[0001] The present application relates to the field of foundation pit support technology, and in particular to a deep foundation pit support structure. Background Art

[0002] Foundation pit support is a measure of support, reinforcement and protection 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. It can effectively prevent the edge of the deep foundation pit from collapsing.

[0003] Existing Figure 1 The deep foundation pit 1 support shown includes a support plate 2 and an abutment rod 21 arranged on the support plate 2. The support plate 2 abuts against the groove wall of the foundation pit 1, and the side of the abutment rod 21 away from the support plate 2 is fixed to the bottom of the foundation pit 1 by a support screw 22.

[0004] When the four groove walls of the foundation pit 1 need to be supported, a plurality of support plates 2 are required to cover the four end faces of the foundation pit 1, and then a plurality of abutment rods 21 are respectively fixed to the bottom of the foundation pit 1, and the supporting process is relatively troublesome. Summary of the invention

[0005] In order to facilitate the support of the four trench walls of the foundation pit, the present application provides a deep foundation pit support structure.

[0006] The present application provides a deep foundation pit support structure, which adopts the following technical solution:

[0007] A deep foundation pit support structure, comprising a foundation pit, a mounting frame, a fixing frame and four sets of support frames, wherein the mounting frame comprises a plurality of rotating plates and a plurality of clamping blocks, wherein the rotating plates are rotatably connected to adjacent rotating plates, the clamping blocks are arranged between two adjacent rotating plates, and a limiting groove for the clamping blocks to be clamped into is provided on the rotating plates, the clamping blocks are clamped into the limiting groove, the two adjacent rotating plates are on the same horizontal plane, and the four support frames are respectively arranged at the four corners of the foundation pit;

[0008] The support frame includes two connecting seats arranged on a rotating plate and a supporting rod arranged between the two connecting seats, the connecting seat is provided with a plug-in component for mounting the connecting seat on the rotating plate, the connecting seat is provided with a connecting plate, the connecting plate abuts against a side end face of the rotating plate away from the foundation pit groove wall, the connecting seat is provided with an elastic member for controlling the connecting plate to move toward the rotating plate, the two ends of the supporting rod are respectively rotatably connected to the two connecting plates, the supporting rod is provided with a first abutting rod, the first abutting rod extends in a horizontal direction, and the first abutting rod is threadedly connected with a second abutting rod;

[0009] The fixed frame includes a fixed seat and four movable seats arranged at the bottom of the foundation pit, the fixed seat is provided with a plurality of mounting parts for fixing the fixed seat to the bottom of the foundation pit, the fixed frame is arranged between four supporting frames, the movable seat is rotatably connected with a rotating seat, the rotating seat is provided with a fixing assembly for fixing the rotating seat to the movable seat, the rotating seat is also provided with a fastening assembly for fixing the second abutment rod, the fixed seat is threadedly connected with a control screw, and the movable seat is provided with a guide inclined surface for the control screw to abut and control the movable seat to slide in a direction away from the control screw.

[0010] By adopting the above technical solution, the mounting frame is placed in the foundation pit, and then the mounting frame is opened, and each rotating plate is abutted against the four groove walls of the foundation pit in turn. When the mounting frame needs to abut the rotating plate against the adjacent groove wall of the foundation pit, the clamping block between two adjacent rotating plates is taken out, and then the rotating plate is rotated to 90° with the adjacent rotating plate and then fits on the groove wall of the foundation pit. When the fourth groove wall of the foundation pit is also abutted by the rotating plate, the remaining rotating plates are removed, and then the four support frames are respectively installed at the four corners of the foundation pit, and then the first abutment rod is rotated, and the second abutment rod is rotated until the fastening assembly fixes the second abutment rod on the rotating seat, and then the fixing assembly fixes the rotating seat, and finally the four moving seats are respectively slid toward the four corners of the foundation pit by controlling the screw rod, and the support frame is pressed against the rotating plate by the first abutment rod and the second abutment rod, and the rotating plate is pressed against the groove wall of the foundation pit, and the installation of the support structure is completed. The effect of conveniently supporting the four groove walls of the foundation pit is achieved.

[0011] Optionally, the connector is a connector rod arranged on the connecting seat, and the upper end surface of the rotating plate is provided with a connector groove for inserting the connector rod, and the elastic member is an abutment spring, one end of which abuts against the connecting plate, and the other end of which abuts against the connecting seat.

[0012] By adopting the above technical solution, the plug rod is inserted into the plug groove, and then the connecting plate is placed on the side of the rotating plate away from the foundation pit wall. Then, under the action of the tension of the abutting tension spring, the connecting plate can abut on the rotating plate.

[0013] Optionally, a guide rod is provided on the connecting seat, the abutting tension spring is sleeved on the guide rod, and a guide groove for the guide rod to slide is formed on the connecting plate.

[0014] By adopting the above technical solution, with the cooperation of the guide rod and the guide groove, the possibility of shaking of the connecting plate is reduced.

[0015] Optionally, a plurality of mounting plates are provided on the fixing seat, and the mounting members are mounting screws, which are threadedly connected to the mounting plates.

[0016] By adopting the above technical solution, the mounting screw is rotated until the mounting screw is inserted into the bottom of the foundation pit, thereby completing the effect of the mounting piece fixing the fixing seat to the bottom of the foundation pit.

[0017] Optionally, a rotating column is provided on the side of the rotating seat close to the movable seat, and the movable seat is provided with a rotating groove for the rotating seat to rotate, and the fixed assembly includes a vertical rod and a plurality of horizontal rods, the vertical rod slides on the rotating column in the vertical direction, and the horizontal rod slides in the rotating column in the horizontal direction, the vertical rod is located at the rotation center line of the rotating column, and a plurality of clamping grooves for the horizontal rod to be inserted are provided on the wall of the rotating groove around the vertical rod, and the horizontal rod is provided with a guide surface for the vertical rod to abut and control the plurality of horizontal rods to slide in the direction of approaching each other, and the rotating column is provided with a driving spring for controlling the plurality of horizontal rods to slide in the direction of moving away.

[0018] By adopting the above technical solution, the vertical rod is controlled to slide toward the guide surface. Under the action of the guide surface, the horizontal rod is retracted into the rotating column. When the rotating seat rotates to the specified position, the restriction of the vertical rod on the horizontal rod is released. Under the action of the elastic force of the driving spring, the horizontal rod is inserted into the clamping groove, completing the effect of the fixing assembly fixing the rotating seat on the moving seat.

[0019] Optionally, a side of the horizontal rod away from the vertical rod is provided with a chamfer.

[0020] By adopting the above technical solution, the chamfering facilitates the insertion of the horizontal rod into the clamping groove.

[0021] Optionally, a snap ring is provided on the circumference of the second abutment rod, and the fastening assembly includes a fastening block and a sliding cover plate, the fastening block is arranged on a rotating seat, the fastening block is provided with a first abutment groove for the second abutment rod to be inserted, the first abutment groove wall is provided with a first groove for the snap ring to be inserted into, the sliding cover plate is slidably connected to the fastening block, the sliding cover plate is provided with a second abutment groove for the second abutment rod to be inserted into, the second abutment groove wall is provided with a second groove for the snap ring to be inserted into, and the sliding cover plate is provided with a plurality of connection components for fixing the fastening block and the sliding cover plate.

[0022] By adopting the above technical solution, the second abutment rod is inserted into the first abutment groove, and the snap ring is inserted into the first slot, and then the sliding cover plate is controlled so that the second abutment rod is also inserted into the second abutment groove, and the snap ring is also inserted into the second slot, and then the sliding cover plate is fixed to the fastening block through the connecting assembly, and the second abutment rod is fixedly connected to the rotating seat through the snap ring and the slot.

[0023] Optionally, the connecting assembly includes a connecting pin that slides on the sliding cover plate and a connecting plug block arranged on the side wall of the connecting pin, the connecting pin slides on the sliding cover plate, and the end surface of the fastening block close to the sliding cover plate is provided with a movable groove for the connecting plug block to slide, and the wall of the movable groove is provided with a rotating groove for the connecting plug block to rotate.

[0024] By adopting the above technical solution, the connecting block is controlled to slide in the moving groove, and then the connecting pin is rotated to rotate the connecting block into the rotating groove, thereby completing the effect of the connecting component fixing the sliding cover plate and the fastening block together.

[0025] Optionally, a connecting tension spring is sleeved on the connecting pin, and an abutment disk is provided on the side of the connecting pin away from the connecting plug block, one end of the connecting tension spring abuts on the abutment disk, and the other end of the connecting tension spring abuts on the sliding cover plate.

[0026] By adopting the above technical solution, under the action of the elastic force of the connecting tension spring, the connecting plug block is pressed against the wall of the rotating groove, thereby improving the stability of the connecting plug block on the fastening block.

[0027] In summary, the present application includes at least one of the following beneficial effects:

[0028] The rotating plate is attached to the four groove walls of the foundation pit, and then the support frames are installed at the four corners of the foundation pit, and the second abutment rod is fixed to the rotating seat, and the rotating seat is fixed to the sliding seat, and finally the control screw is rotated. Under the action of the guide slope, the four rotating seats slide toward the four corners of the foundation pit respectively, and the first abutment rod transmits the pressure to the support rod, and the support rod transmits it to the foundation pit groove wall through the connecting plate and the rotating plate, completing the installation of the support structure. The effect of conveniently supporting the four groove walls of the foundation pit is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the prior art;

[0030] Figure 2 It is a schematic diagram of the overall structure of this embodiment;

[0031] Figure 3 is an exploded schematic diagram of the rotating plate and the rotating shaft in this embodiment;

[0032] Figure 4 is a cross-sectional schematic diagram highlighting the support rod in this embodiment;

[0033] Figure 5 yes Figure 4 The enlarged schematic diagram of point A in the middle;

[0034] Figure 6 is a cross-sectional schematic diagram of the fixing seat in this embodiment;

[0035] Figure 7 is a cross-sectional schematic diagram highlighting the fixing component in this embodiment;

[0036] Figure 8 yes Figure 7 The enlarged schematic diagram of point B in the middle;

[0037] Fig. 9 is a cross-sectional schematic diagram of the fastening block and the sliding cover plate in this embodiment;

[0038] Fig.10 It is a cross-sectional schematic diagram highlighting the connection components in this embodiment.

[0039] Description of reference numerals: 1, foundation pit; 2, support plate; 21, abutment rod; 22, support screw; 3, mounting frame; 31, rotating plate; 311, rotating part; 3111, rotating groove; 312, limiting groove; 313, plug-in groove; 32, clamping block; 321, pull ring; 4, fixing frame; 41, fixing seat; 411, mounting plate; 4111, mounting groove; 412, sliding groove; 413, translation groove; 414, translation groove; 415, control groove ; 42, moving seat; 421, translation block; 422, moving block; 4221, guide bevel; 423, rotation groove; 424, clamping groove; 5, support frame; 51, connecting seat; 511, guide rod; 52, support rod; 521, first abutment rod; 5211, threaded groove; 522, second abutment rod; 523, reinforcing rib; 6, rotating shaft; 7, plug-in; 71, plug-in rod; 8, connecting plate; 81, guide groove; 9, elastic member; 9 1. abutment tension spring; 10. mounting member; 101. mounting screw; 11. control screw; 12. rotating seat; 121. rotating column; 1211. vertical slot; 1212. horizontal slot; 13. fixing assembly; 131. vertical rod; 1311. crossbar; 1312. vertical rod; 132. horizontal rod; 1321. chamfer; 14. driving spring; 15. fastening assembly; 151. fastening block; 1511. connecting rod; 1512. first Abutment groove; 1513, first clamping groove; 1514, movable groove; 1515, rotating groove; 1516, clamping groove; 152, sliding cover plate; 1521, connecting groove; 1522, second abutment groove; 1523, second clamping groove; 1524, sliding groove; 1525, movable groove; 16, connecting assembly; 161, connecting pin; 1611, abutment plate; 162, connecting plug block; 17, connecting tension spring; 18, vertical pole; 19, retaining ring. DETAILED DESCRIPTION

[0040] The following is combined with Figure 2-10 This application is described in further detail.

[0041] The embodiment of the present application discloses a deep foundation pit support structure.

[0042] Reference Figure 2 and Figure 3 The deep foundation pit support structure includes a foundation pit 1, a mounting frame 3, a fixing frame 4 and four groups of support frames 5, wherein the mounting frame 3 includes a plurality of rotating plates 31 and a plurality of blocks 32, and a rotating portion 311 is integrally formed on the side where two rotating plates 31 are close to each other, and the two rotating portions 311 are abutted together, and a rotating shaft 6 is installed between the two rotating portions 311, and a rotating groove 3111 for the rotating shaft 6 to rotate is opened on the rotating portion 311, and the rotating plate 31 is rotatably connected to the adjacent rotating plate 31 by the rotating shaft 6 and the first rotating shaft 6. When the rotating shaft 6 is removed, the rotating plate 31 is separated from the adjacent rotating plate 31.

[0043] Reference Figure 2 and Figure 3 The block 32 is installed on two adjacent rotating plates 31. A limiting groove 312 for the block 32 to slide in the vertical direction is provided on the upper end surface of the rotating plate 31. When the two adjacent rotating plates 31 are in the same plane, the limiting grooves 312 of the two adjacent rotating plates 31 are connected, and the block 32 is controlled to slide in the limiting groove 312 in the vertical direction, and the two rotating plates 31 cannot continue to rotate relative to each other. In order to facilitate the control of the block 32 to escape from the limiting groove 312, a pull ring 321 is also welded on the upper end surface of the block 32.

[0044] Reference Figure 2 and Figure 3 , open the mounting frame 3 so that the rotating plate 31 abuts against the groove wall on one side of the foundation pit 1, and the adjacent rotating plates 31 are in the same plane through the clamping block 32. When the rotating plate 31 needs to abut against the adjacent groove wall, the clamping block 32 is removed through the pull ring 321 and then the rotating plate 31 is rotated to be perpendicular to the adjacent rotating plate 31, and then the rotating plate 31 continues to be attached to the groove wall of the foundation pit 1 until the third foundation pit 1 is also abutted by the rotating plate 31, fold the excess rotating plate 31 to make it abut against the rotating plate 31 abutting against the groove wall of the fourth foundation pit 1, and when the fourth rotating plate 31 is also abutted against the groove wall of the foundation pit 1, remove the excess rotating plate 31 to complete the installation of the mounting frame 3.

[0045] Reference Figure 4 and Figure 5 The support frame 5 is installed at the four corners of the foundation pit 1. The support frame 5 includes two connecting seats 51 and a supporting rod 52. The two connecting seats 51 are respectively installed on two rotating plates 31 abutting against different groove walls of the foundation pit 1. A plug-in component 7 is installed on the connecting seat 51. The plug-in component 7 is a plug-in rod 71 welded on the connecting seat 51. A plug-in groove 313 for inserting the plug-in rod 71 is opened on the upper end surface of the rotating plate 31.

[0046] Reference Figure 4 and Figure 5A connecting plate 8 is installed on the side of the rotating plate 31 away from the groove wall of the foundation pit 1, and an elastic member 9 is installed between the connecting seat 51 and the connecting plate 8. The elastic member 9 is a contact tension spring 91, one end of the contact tension spring 91 is contacted with the connecting plate 8, and the other end of the contact tension spring 91 is contacted with the connecting seat 51. When the plug rod 71 is inserted into the plug slot 313, the connecting plate 8 is pressed against the rotating plate 31 under the action of the tension of the contact tension spring 91, and the installation of the connecting seat 51 on the rotating plate 31 is completed.

[0047] Reference Figure 4 and Figure 5 A guide rod 511 is welded to the connection seat 51, and the guide rod 511 faces the connection plate 8. A guide groove 81 is provided on the connection plate 8 for the guide rod 511 to slide. With the cooperation of the guide rod 511 and the guide groove 81, the possibility of shaking of the connection plate 8 is reduced. At the same time, the abutting tension spring 91 is sleeved on the guide rod 511, which can effectively reduce the possibility of distortion of the abutting tension spring 91.

[0048] Reference Figure 4 and Figure 5 The support rod 52 is installed between the two connecting plates 8, and the two ends of the support rod 52 are respectively connected to the two connecting plates 8 through shaft rotation. A vertical rod 18 is welded on the support rod 52, and a first abutment rod 521 is welded on the vertical rod 18. A second abutment rod 522 is installed on the side of the first abutment rod 521 away from the mounting ring. The second abutment rod 522 is provided with a threaded portion, and a thread groove 5211 matched with the threaded portion of the second abutment rod 522 is opened on the first abutment rod 521. By rotating the second threaded rod, the second threaded rod can move toward or away from the first abutment rod 521.

[0049] Reference Figure 4 and Figure 5 In order to strengthen the connection strength between the first abutting rod 521 and the supporting rod 52 , a plurality of reinforcing ribs 523 are welded between the first abutting rod 521 and the supporting rod 52 .

[0050] Reference Figure 2 The fixed frame 4 is installed in the middle position of the foundation pit 1. The fixed frame 4 includes a fixed seat 41 and four movable seats 42. A plurality of mounting plates 411 are welded at the bottom of the fixed seat 41.

[0051] Reference Figure 6 A mounting member 10 is installed on the mounting plate 411. The mounting member 10 is a mounting screw 101. A mounting groove 4111 that is compatible with the threaded portion of the mounting screw 101 is opened on the mounting plate 411. The mounting screw 101 is rotated on the mounting plate 411, and the fixing frame 4 is fixedly installed by the mounting screw 101.

[0052] Reference Figure 6A sliding groove 412 for the sliding of the moving seat 42 is provided on the fixed seat 41, and a translation block 421 is welded at the lower end of the moving seat 42. The translation block 421 is an inverted T-shaped block. A translation groove 413 adapted to the translation block 421 is provided at the bottom of the sliding groove 412. A moving block 422 is welded on the end surface of one side close to the four moving seats 42, and a translation groove 414 for the sliding of the moving block 422 is provided on the wall of the sliding groove 412. A control screw 11 is installed on the fixed seat 41, and the control screw 11 is located between the four moving blocks 422. A control groove 415 adapted to the threaded portion of the control screw 11 is provided on the upper end surface of the fixed seat 41, and the control groove 415 is adapted to the translation groove 414. A guide inclined surface 4221 is provided on the moving block 422.

[0053] Reference Figure 6 , the control screw 11 is rotated to slide toward the moving block 422 until the control screw 11 abuts against the guide slope 4221 , and under the action of the guide slope 4221 , the four moving seats 42 can move toward the direction away from each other.

[0054] Reference Figure 7 and Figure 8 A rotating seat 12 is also installed on the moving seat 42 , a rotating column 121 is welded on one side of the rotating seat 12 close to the moving seat 42 , and a rotating groove 423 for the rotating seat 12 to rotate is opened in the moving seat 42 . A fixing assembly 13 is installed on the rotating seat 12, and the fixing assembly 13 includes a vertical rod 131 and a plurality of horizontal rods 132. In this embodiment, three horizontal rods 132 are taken as an example. A vertical groove 1211 is provided on the rotating column 121 for the vertical rod 131 to slide in the vertical direction. Three cross rods 1311 are welded on the peripheral side of the vertical rod 131. A vertical rod 1312 is integrally formed at the lower end of the cross rod 1311. The cross rod 1311 and the vertical rod 1312 also slide in the vertical groove 1211. The vertical groove 1211 penetrates to the upper end surface of the movable seat 42. A horizontal groove 1212 is provided on the outer peripheral side of the rotating column 121 for the horizontal rod 132 to extend in the horizontal direction. The horizontal groove 1212 is communicated with the vertical groove 1211.

[0055] Reference Figure 7 and Figure 8 A plurality of snap-in grooves 424 for inserting the horizontal rod 132 are provided on the wall of the rotating groove 423, and the plurality of snap-in grooves 424 are evenly arranged around the vertical rod 131. The horizontal rod 132 is provided with a guide surface. A driving spring 14 is also installed in the rotating column 121, and one end of the driving spring 14 abuts against the horizontal rod 132, and the other end of the driving spring 14 abuts against the bottom of the horizontal groove 1212.

[0056] Reference Figure 7 and Figure 8When it is necessary to rotate the rotating seat 12, the vertical rod 131 is controlled to descend until the vertical rod 1312 abuts against the guide surface. At this time, under the action of the guide surface, the three horizontal rods 132 slide in the direction of approaching each other until the three horizontal rods 132 are completely retracted into the rotating column 121. Then the rotating seat 12 can be rotated. When the rotating seat 12 rotates to the specified position, the restriction of the vertical rod 131 on the horizontal rod 132 is released. Under the action of the elastic force of the driving spring 14, the horizontal rod 132 slides in the direction away from the bottom of the horizontal groove 1212 until the horizontal rod 132 is inserted into the clamping groove 424, thereby completing the fixation of the rotating seat 12 on the moving seat 42.

[0057] Reference Figure 7 and Figure 8 In order to facilitate the insertion of the horizontal rod 132 into the snap-in groove 424 , a chamfer 1321 is provided on the side of the horizontal rod 132 away from the bottom of the horizontal groove 1212 .

[0058] Reference Fig. 9 A fastening assembly 15 is installed on the rotating seat 12, and the fastening assembly 15 includes a fastening block 151 and a sliding cover plate 152. Two connecting rods 1511 are welded on the fastening block 151, and a connecting groove 1521 for the connecting rod 1511 to slide is provided on the sliding cover plate 152, wherein the fastening block 151 is welded on the rotating seat 12, and a first abutting groove 1512 for the second abutting rod 522 to be inserted is provided on the fastening block 151, and a second abutting groove 1522 for the second abutting rod 522 to be inserted is provided on the lower end surface of the sliding cover plate 152, and a snap ring 19 is also welded on the outer peripheral side of the second abutting rod 522, a first snapping groove 1513 for the snapping ring 19 to be inserted is provided on the groove wall of the first abutting groove 1512, and a second snapping groove 1523 for the snapping ring 19 to be inserted is provided on the groove wall of the second abutting groove 1522.

[0059] Reference Fig. 9 , insert the second abutment rod 522 into the first abutment groove 1512, and at the same time, insert the retaining ring 19 into the first retaining groove 1513, and then control the sliding cover plate 152 to make the second abutment rod 522 also insert into the second abutment groove 1522, and the retaining ring 19 also insert into the second retaining groove 1523, thereby completing the installation of the second abutment rod 522 on the rotating seat 12.

[0060] Reference Fig. 9 and Fig.10A plurality of connection components 16 are installed on the sliding cover plate 152, and the connection components 16 include a connection pin 161 and a connection plug block 162. A sliding groove 1524 for the connection pin 161 to slide in the vertical direction is provided on the upper end surface of the sliding cover plate 152, and a movable groove 1525 for the connection plug block 162 to slide is provided on the sliding cover plate 152. The connection plug block 162 is welded to the connection pin 161, and a clamping groove 1516 for the connection pin 161 to slide is provided on the fastening block 151. A movable groove 1514 for the connection plug block 162 to slide is provided on one end surface of the fastening block 151 close to the sliding cover plate 152, and a rotating groove 1515 for the plug block to rotate is provided on the groove wall of the movable groove 1514.

[0061] Reference Fig. 9 and Fig.10 When the sliding cover plate 152 slides toward the fastening block 151, the connecting block 162 slides in the moving groove 1514, and then the connecting pin 161 is rotated to make the connecting block 162 rotate into the rotating groove 1515, so that the connecting component 16 can fix the sliding cover plate 152 and the fastening block 151 together.

[0062] Reference Fig. 9 and Fig.10 In order to enhance the stability of the connecting plug 162, a connecting tension spring 17 is sleeved on the connecting pin 161, and a contact plate 1611 is welded on the side of the connecting pin 161 away from the connecting plug 162. One end of the connecting tension spring 17 contacts the contact plate 1611, and the other end of the connecting tension spring 17 contacts the sliding cover plate 152. Under the action of the elastic force of the connecting tension spring 17, the connecting plug 162 can be tightly pressed against the wall of the rotating groove 1515.

[0063] The implementation principle of a deep foundation pit support structure in the embodiment of the present application is:

[0064] The mounting frame 3 is placed in the foundation pit 1, and then the mounting frame 3 is opened, and each rotating plate 31 is sequentially abutted against the four groove walls of the foundation pit 1. When the mounting frame 3 needs to abut the rotating plate 31 against the adjacent groove wall of the foundation pit 1, the clamping block between two adjacent rotating plates 31 is taken out, and then the rotating plate 31 is rotated to 90 degrees with the adjacent rotating plate 31 and then affixed to the groove wall of the foundation pit 1. When the groove wall of the fourth foundation pit 1 is also abutted by the rotating plate 31, the remaining rotating plates 31 are removed, and then the fixing seat 41 is fixedly installed on the bottom of the groove of the foundation pit 1 by the mounting screws 101, and the guide bevel is fixedly installed. The surface 4221 is abutted against the control screw 11, and then the second abutting rod 522 is inserted into the first abutting groove 1512 on one side, and the plug-in rod 71 is inserted into the plug-in groove 313 on the other side, and the rotation angle of the rotating seat 12 is adjusted at the same time. When the clamping ring 19 of the second abutting rod 522 cannot be inserted into the first clamping groove 1513, the second abutting rod 522 is rotated to move the second abutting rod 522 away from the first abutting rod 521. After the second abutting rod 522 is inserted into the first abutting groove 1512, the sliding cover plate 152 is fixed to the fastening block 151 through the connecting assembly 16. Finally, the control screw 11 is rotated, and under the action of the guide inclined surface 4221, the four moving seats 42 move in the direction away from each other, and the support frame 5 is pressed against the rotating plate 31 through the first abutting rod 521 and the second abutting rod 522, and the rotating plate 31 is pressed against the groove wall of the foundation pit 1, and the installation of the support structure is completed. This achieves the effect of conveniently supporting the four groove walls of the foundation pit 1.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deep foundation pit support structure, characterized in that: It includes a foundation pit, a mounting frame, a fixing frame and four sets of supporting frames, the mounting frame includes a plurality of rotating plates and a plurality of clamping blocks, the rotating plates are rotatably connected to adjacent rotating plates, the clamping blocks are arranged between two adjacent rotating plates, a limiting groove for the clamping blocks to be clamped is provided on the rotating plates, the clamping blocks are clamped into the limiting groove, the two adjacent rotating plates are on the same horizontal plane, and the four supporting frames are respectively arranged at the four corners of the foundation pit; The support frame includes two connecting seats arranged on a rotating plate and a supporting rod arranged between the two connecting seats, the connecting seat is provided with a plug-in component for mounting the connecting seat on the rotating plate, the connecting seat is provided with a connecting plate, the connecting plate abuts against a side end face of the rotating plate away from the foundation pit groove wall, the connecting seat is provided with an elastic member for controlling the connecting plate to move toward the rotating plate, the two ends of the supporting rod are respectively rotatably connected to the two connecting plates, the supporting rod is provided with a first abutting rod, the first abutting rod extends in a horizontal direction, and the first abutting rod is threadedly connected with a second abutting rod; The fixing frame includes a fixing seat and four movable seats arranged at the bottom of the foundation pit, the fixing seat is provided with a plurality of mounting members for fixing the fixing seat to the bottom of the foundation pit, the fixing frame is arranged between four supporting frames, the movable seat is rotatably connected with a rotating seat, the rotating seat is provided with a fixing assembly for fixing the rotating seat to the movable seat, the rotating seat is also provided with a fastening assembly for fixing the second abutting rod, the fixing seat is threadedly connected with a control screw, the movable seat is provided with a guide inclined surface for the control screw to abut and control the movable seat to slide in a direction away from the control screw; a plurality of mounting plates are provided on the fixing seat, the mounting members are mounting screws, and the mounting The screw is threadedly connected to the mounting plate; a rotating column is provided on the side of the rotating seat close to the movable seat, and the movable seat is provided with a rotating groove for the rotating seat to rotate, and the fixed assembly includes a vertical rod and a plurality of horizontal rods, the vertical rod slides on the rotating column in the vertical direction, and the horizontal rod slides in the rotating column in the horizontal direction, the vertical rod is located at the rotation center line of the rotating column, and a plurality of clamping grooves for the horizontal rod to be inserted are provided on the wall of the rotating groove around the vertical rod, and the horizontal rod is provided with a guide surface for the vertical rod to abut and control the plurality of horizontal rods to slide in the direction of approaching each other, and the rotating column is provided with a driving spring for controlling the plurality of horizontal rods to slide in the direction of moving away.

2. A deep foundation pit support structure according to claim 1, characterized in that: The connector is a plug rod arranged on the connecting seat, the upper end surface of the rotating plate is provided with a plug groove for inserting the plug rod, and the elastic member is an abutment tension spring, one end of which abuts on the connecting plate, and the other end of which abuts on the connecting seat.

3. A deep foundation pit support structure according to claim 2, characterized in that: A guide rod is arranged on the connecting seat, the abutting tension spring is sleeved on the guide rod, and a guide groove for the guide rod to slide is opened on the connecting plate.

4. A deep foundation pit support structure according to claim 1, characterized in that: A chamfer is arranged on one side of the horizontal rod away from the vertical rod.

5. A deep foundation pit support structure according to claim 4, characterized in that: A snap ring is arranged on the peripheral side of the second abutment rod, and the fastening assembly includes a fastening block and a sliding cover plate, the fastening block is arranged on the rotating seat, the fastening block is provided with a first abutment groove for the second abutment rod to be inserted, the first abutment groove wall is provided with a first groove for the snap ring to be inserted into, the sliding cover plate is slidably connected to the fastening block, the sliding cover plate is provided with a second abutment groove for the second abutment rod to be inserted into, the second abutment groove wall is provided with a second groove for the snap ring to be inserted into, and the sliding cover plate is provided with a plurality of connection assemblies for fixing the fastening block and the sliding cover plate.

6. A deep foundation pit support structure according to claim 5, characterized in that: The connecting assembly includes a connecting pin that slides on the sliding cover plate and a connecting plug block arranged on the side wall of the connecting pin. The connecting pin slides on the sliding cover plate. The end surface of the fastening block close to the sliding cover plate is provided with a movable groove for the connecting plug block to slide. The groove wall of the movable groove is provided with a rotating groove for the plug block to rotate.

7. A deep foundation pit support structure according to claim 6, characterized in that: A connecting tension spring is sleeved on the connecting pin, and an abutment disk is provided on the side of the connecting pin away from the connecting plug block. One end of the connecting tension spring abuts on the abutment disk, and the other end of the connecting tension spring abuts on the sliding cover plate.

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