CN220377294U - Auxiliary supporting device for foundation pit construction - Google Patents

Abstract

The utility model provides an auxiliary supporting device for foundation pit construction, which belongs to the technical field of building engineering and comprises a first support, wherein the upper end of the first support is rotationally connected with a second support through a rotating shaft, the side wall of an extension frame is fixedly provided with a fixed seat, the inner side wall of the fixed seat is in threaded connection with a clamping bolt, a plurality of threaded holes correspond to the clamping bolt, a trapezoid shaft is rotated, so that a movable seat drives one end of a hinged transmission rod to move through the first connecting seat, the second support is moved to a position attached to the side wall of a foundation pit according to the angle of the side wall of the foundation pit, the second support is adjusted according to the shape of the inner wall of the foundation pit, the attachment degree with the inner wall of the foundation pit is improved, the stability of the foundation pit is guaranteed, and therefore the safety of a construction process is improved.

Description

Auxiliary supporting device for foundation pit construction

Technical Field

The utility model belongs to the technical field of constructional engineering, and particularly relates to an auxiliary supporting device for foundation pit construction.

Background

The foundation pit is a soil pit excavated according to the substrate elevation and the foundation plane size at the foundation design position, the excavation scheme is determined according to geological hydrologic data before excavation and by combining the conditions of buildings nearby the site, waterproof drainage work is carried out, a method of discharging a side slope can be used for the person with the non-deep excavation, the soil slope is stable, the gradient of the soil slope is determined according to relevant construction regulations, the person with the deep excavation and the vicinity of the building can be protected by a foundation pit wall supporting method, a concrete spraying protection wall method, a large foundation pit even adopts a method of interlocking underground continuous walls and column type bored piles and the like, and the soil layer outside the foundation pit is protected from collapse; the underground water level can be reduced by using a well point method without influencing the nearby buildings, and slope-releasing open cut is adopted; the auxiliary supporting device for foundation pit construction is provided for the cold area, which can be excavated by adopting a natural cold air freezing method and the like, and collapse can be caused in the pit digging process due to unstable soil.

Disclosure of Invention

In order to solve the problems of foundation pit construction and the like in the prior art, the utility model provides an auxiliary supporting device for foundation pit construction, which adopts a rotating structure to combine with a regulating mechanism to achieve the effect of being applicable to foundation pits with different shapes. The specific technical scheme is as follows:

the utility model provides an auxiliary stay device of foundation ditch construction, includes first support, the upper end of first support is connected with the second support through the pivot rotation, the lateral wall fixed mounting of second support has the slider, slider sliding connection is at the inside wall of extension frame, the second support run through in the lateral wall of extension frame and extend to outside, the lateral wall fixed mounting of extension frame has the fixing base, the inside wall threaded connection of fixing base has the joint bolt, a plurality of screw hole has evenly been seted up to the upper lateral wall of second support, a plurality of the screw hole with the joint bolt is corresponding, the lateral wall symmetry of first support is connected with trapezoidal axle through the supporting seat rotation, the external screw thread has been seted up to the lateral wall of trapezoidal axle, the lateral wall threaded connection of trapezoidal axle has the movable seat, the lateral wall fixed mounting of movable seat has first connecting seat, the inner chamber of first connecting seat is connected with the one end of transfer line through the axis of rotation, the other end of transfer line is connected with the second connecting seat through the axis of rotation, second connecting seat fixed mounting is in the lateral wall of second support, the lateral wall of first support has the fixed mounting of bottom plate.

In addition, the auxiliary supporting device for foundation pit construction in the technical scheme provided by the utility model can also have the following additional technical characteristics:

in the above technical scheme, preferably, the front side wall of the first bracket is provided with a movable groove, the inner side wall of the movable groove is slidably connected with a guide wheel, the guide wheel is movably connected with the outer side wall of the connecting frame, and the connecting frame is fixedly mounted on the side wall of the movable seat.

Preferably, a sliding groove is circumferentially formed in the outer side wall of the sliding block, balls are symmetrically connected to the inner side wall of the sliding groove in a sliding mode, and two balls are symmetrically connected to the inner side wall of the extension frame in a sliding mode.

Preferably, the one end that the side wall symmetry of first support was installed to fixed mounting has the stiffener, the other end fixed mounting of stiffener has first connecting block, first connecting block rotates the inside wall of connecting at the second connecting block, second connecting block fixed mounting is at the upper side wall of mount pad, first connecting block with the inner chamber of second connecting block rotates and is connected with stop bolt, stop bolt's lateral wall threaded connection has the nut.

Preferably, the side walls of the first bracket, the second bracket and the extension bracket are uniformly provided with connecting holes.

Preferably, the outer side wall of the first bracket is provided with an angle measuring mark, the angle measuring mark is arranged on the outer side wall of the rotating shaft, a pointer is fixedly arranged on the front side wall of the rotating shaft, and the pointer corresponds to the angle measuring mark.

Preferably, the inner side wall of the bottom plate is connected with foundation bolts in a threaded mode.

Preferably, the lower side wall of the mounting seat is symmetrically and fixedly provided with reinforcing nails.

Preferably, a limiting block is fixedly arranged on the lower side wall of the second bracket.

Compared with the prior art, the auxiliary supporting device for foundation pit construction has the beneficial effects that: an auxiliary supporting device for foundation pit construction, which is characterized in that a trapezoid shaft is rotated, the rotating trapezoid shaft is supported by two supporting seats, the stability of the rotating process of the trapezoid shaft is ensured, the stability of the moving process of a movable seat is ensured, the movable seat with the threaded connection of the outer surface moves along the outer surface of the trapezoid shaft when the trapezoid shaft rotates, a second bracket is moved to a position attached to the side wall of a foundation pit according to the angle of the side wall of the foundation pit, the attachment degree of the second bracket to the inner wall of the foundation pit is improved, the stability of the foundation pit is ensured, the safety of the construction process is improved, when the length of the second bracket needs to be adjusted, the length of the support is ensured through an extension frame, the stability in the foundation pit is ensured, after the extension frame is adjusted to a proper length, a clamping bolt is clamped in a corresponding threaded hole, and the length of the extension frame is locked, the stability of the process of supporting the foundation pit is ensured, after the construction is finished, the position of the second bracket is adjusted by rotating the trapezoid shaft, thereby folding the first bracket and the second bracket, bringing convenience to the carrying and taking of constructors, bringing convenience to the operation of related personnel, when the movable seat drives one end of the transmission rod to move, the movable seat drives the guide wheel to be attached to the inner wall of the movable groove to slide through the connecting frame, the stability of the moving process of the movable seat is ensured, the stability of the transmission rod is ensured, when the length of the extension frame is adjusted, the extension frame is attached to the outer surfaces of two balls to slide, the stability of the moving process of the extension frame is ensured, the second connecting block is rotated on the outer surface of the first connecting block by taking the limit bolt as the center, the mounting seat is adjusted to the position which is leveled with the mounting surface in the foundation pit through the second connecting block, the locking through nut and stop bolt makes first connecting block and second connecting block take place elastic deformation to the position locking with the mount pad, afterwards fix the mount pad subaerial, the stiffener through first support both sides has increased the stability of first support, thereby the steadiness of foundation ditch work progress has been guaranteed, and then the security of work progress has been guaranteed, through a plurality of first supports, second support and extension frame interconnect are in order to increase the steadiness, prevent that the foundation ditch from collapsing, when rotating the second support through the pivot, make the second support drive the pointer rotation, know angle regulation through the position of pointer on the angle measurement marking that can be clear, observe the position of angle measurement marking according to the angle of foundation ditch lateral wall, the accuracy of rotation process has been improved, the steadiness of support has been improved.

Drawings

Fig. 1 is a schematic structural diagram of an auxiliary supporting device for foundation pit construction according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of an auxiliary support device for foundation pit construction according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion at B of a cross-sectional view of the structure of an auxiliary support device for foundation pit construction according to the embodiment of the present utility model of FIG. 2;

wherein, the correspondence between the reference numerals and the component names in fig. 1 to 3 is: the device comprises a first bracket, a second bracket, a 3-extension bracket, a 4-transmission rod, a 5-limiting block, a 6-rotating shaft, a 7-trapezoidal shaft, a 8-bottom plate, a 9-installation seat, a 10-pointer, an 11-angle measuring mark, a 12-support seat, a 13-movable seat, a 14-second connection seat, a 15-first connection seat, a 16-connection hole, a 17-fixed seat, a 18-clamping bolt, a 19-movable groove, a 20-external thread, a 21-foundation bolt, a 22-reinforcing rod, a 23-first connection block, a 24-nut, a 25-limiting bolt, a 26-reinforcing nail, a 27-second connection block, a 28-threaded hole, a 29-slider, a 30-chute, a 31-ball, a 32-connection frame and a 33-guide wheel.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

The utility model will be further described with reference to specific embodiments and figures 1-3, but the utility model is not limited to these embodiments.

Example 1

An auxiliary supporting device for foundation pit construction, as shown in figures 1-3, comprises a first bracket 1, wherein the upper end of the first bracket 1 is rotationally connected with a second bracket 2 through a rotating shaft 6, the inside of the upper end of the first bracket 1 is rotationally connected with the rotating shaft 6 through a bearing, the second bracket 2 is fixedly sleeved on the outer surface of the rotating shaft 6 through a mounting hole formed in the right end, so that the first bracket 1 and the second bracket 2 rotate mutually, the side wall of the second bracket 2 is fixedly provided with a sliding block 29, the sliding block 29 is slidingly connected on the inner side wall of an extension frame 3, the shape of the sliding block 29 corresponds to the shape of the inner cavity of the extension frame 3, the sliding block 29 is ensured to be attached on the inner wall of the extension frame 3 and slide, the second bracket 2 penetrates through the side wall of the extension frame 3 and extends to the outside, the second bracket 2 slides in a penetrating hole of the extension frame 3, the side wall of the extension frame 3 is fixedly provided with a fixing seat 17, the inner side wall of the fixed seat 17 is in threaded connection with a clamping bolt 18, the upper side wall of the second bracket 2 is uniformly provided with a plurality of threaded holes 28, the plurality of threaded holes 28 correspond to the clamping bolt 18, the threads and the aperture of the threaded holes 28 correspond to the external threads of the clamping bolt 18, the clamping bolt 18 is ensured to be clamped in the threaded holes 28, the side wall of the first bracket 1 is symmetrically and rotatably connected with a trapezoid shaft 7 through a supporting seat 12, the outer side wall of the trapezoid shaft 7 is provided with an external thread 20, the outer side wall of the trapezoid shaft 7 is in threaded connection with a movable seat 13, the inner cavity of the movable seat 13 is provided with a threaded hole corresponding to the external thread, the movable seat 13 is in threaded connection with the trapezoid shaft 7, the side wall of the movable seat 13 is fixedly provided with a first connecting seat 15, the inner cavity of the first connecting seat 15 is rotatably connected with one end of a transmission rod 4 through a rotating shaft, the other end of the transmission rod 4 is rotationally connected with a second connecting seat 14 through a rotating shaft, the second connecting seat 14 is fixedly arranged on the side wall of the second bracket 2, two second connecting seats 14 are symmetrically and fixedly arranged on the lower surface of the second bracket 2, the rotating shaft is fixedly arranged between the two second connecting seats 14, the upper end of the transmission rod 4 is movably sleeved on the outer surface of a rotating shaft in the second connecting seat 14 through an opened mounting hole, the transmission rod 4 is hinged with the second connecting seat 14, the other rotating shaft inside the transmission rod 4 is fixed on the surface of the first bracket 1 through a first connecting seat 15, the other end of the transmission rod 4 is movably sleeved on the outer surface of the rotating shaft in the first connecting seat 15 through an opened mounting hole, the two ends of the transmission rod 4 are respectively hinged with the first connecting seat 15 and the second connecting seat 14, the lower side wall of the first bracket 1 is fixedly provided with a bottom plate 8, the bottom plate 8 is fixed on a proper position of the edge of the foundation pit, then the position of the second bracket 2 is adjusted according to the angle of the edge of the foundation pit, the trapezoid shaft 7 is rotated, the rotating trapezoid shaft 7 is supported by the two supporting seats 12, the stability of the rotating process of the trapezoid shaft 7 is ensured, the stability of the moving process of the movable seat 13 is ensured, the movable seat 13 with the threaded connection of the outer surface moves along the outer surface of the trapezoid shaft 7 when the trapezoid shaft 7 rotates, the movable seat 13 drives one end of the hinged transmission rod 4 to move through the first connecting seat 15, the other end of the transmission rod 4 drives the second bracket 2 to move through the hinged second connecting seat 14, the second bracket 2 is rotated by taking the rotating shaft 6 inside the first bracket 1 as a center when the second bracket 2 moves, the second bracket 2 is moved to a position attached to the side wall of the foundation pit according to the angle of the side wall of the foundation pit, according to the shape of foundation ditch inner wall is adjusted, the laminating degree with the foundation ditch inner wall has been improved, the stability of foundation ditch has been guaranteed, thereby the security of work progress has been improved, when the length needs to be adjusted at second support 2, slide extension frame 3 in the surface of second support 2, guarantee the length of support through extension frame 3, stability in the foundation ditch has been guaranteed, after the extension frame 3 adjusts suitable length, rotate joint bolt 18 in fixing base 17's inside, with joint bolt 18 joint in the screw hole 28 that corresponds, thereby the length locking of extension frame 3, the stability of supporting the foundation ditch process has been guaranteed, after the construction is finished, adjust the position of second support 2 through rotating trapezoidal axle 7, thereby fold first support 1 and second support 2, make things convenient for constructor to carry and take, the operation of personnel brings convenience.

Specifically, the movable groove 19 has been seted up to the preceding lateral wall of first support 1, the inside wall sliding connection of movable groove 19 has leading wheel 33, leading wheel 33 swing joint is at the lateral wall of link 32, link 32 fixed mounting is at the lateral wall of movable seat 13, leading wheel 33 rotates with link 32 as the center, when movable seat 13 drives the one end of transfer line 4 and removes, make movable seat 13 drive leading wheel 33 laminating at the inner wall of movable groove 19 through link 32 and slide, the stability of movable seat 13 removal process has been guaranteed, thereby the stability of transfer line 4 has been guaranteed, and then the stability of foundation ditch supporting process has been guaranteed.

Specifically, the spout 30 has been seted up to the lateral wall circumference of slider 29, the symmetrical sliding connection of inside wall of spout 30 has ball 31, the sliding connection of two ball 31 symmetries is at the inside wall of extension frame 3, a week's spout 30 has been seted up at the surface of slider 29, the shape of spout 30 corresponds with ball 31, guarantee that ball 31 can laminate the inner wall slip at extension frame 3 after the spout 30 is inside for when adjusting extension frame 3 length, make extension frame 3 laminate the surface slip at two balls 31, guaranteed extension frame 3 removal process's stability, thereby guaranteed foundation ditch supporting process's stability.

Specifically, the one end of the side wall symmetry of first support 1's fixed mounting has stiffener 22, stiffener 22's the other end fixed mounting has first connecting block 23, first connecting block 23 rotates the inside wall of connecting at second connecting block 27, second connecting block 27 fixed mounting is at the upper side wall of mount pad 9, the spread groove has been seted up at the upper surface of second connecting block 27, first connecting block 23 embeds in the inside of spread groove and laminating at the inner wall rotation of second connecting block 27, first connecting block 23 and second connecting block 27 are the elastomer, first connecting block 23 and the inner chamber rotation of second connecting block 27 are connected with spacing bolt 25, the lateral wall threaded connection of spacing bolt 25 has nut 24, when supporting the foundation ditch, take off spacing bolt 25's nut 24 respectively, then rotate at first connecting block 23's surface and rotate second connecting block 27 with spacing bolt 25 as the center, adjust mount pad 9 to the position that is level with interior installation face through second connecting block 27, then screw nut 24 at spacing bolt 25's surface, make first connecting block 23 and second connecting block 23 take place the elasticity and warp the position of first support 2, thereby the stability of the construction process has been guaranteed to the first support 2, and the stability of the installation is guaranteed to the first support is carried out on the foundation ditch 2.

Specifically, the connecting holes 16 are uniformly formed in the side walls of the first support 1, the second support 2 and the extension frame 3, so that the mutual connection among the first supports 1, the second support 2 and the extension frame 3 is more convenient, and the stability is improved through the mutual connection among the first supports 1, the second supports 2 and the extension frame 3, so that the foundation pit collapse is prevented.

Specifically, the lateral wall of first support 1 is provided with angle measurement marking 11, angle measurement marking 11 sets up the lateral wall at pivot 6, set up a week angle measurement marking 11 along the surface of pivot 6 and be located the surface of first support 1, the preceding lateral wall fixed mounting of pivot 6 has pointer 10, pointer 10 is corresponding with angle measurement marking 11, when rotating second support 2 through pivot 6, make second support 2 drive pointer 10 rotate, can be clear through the understanding angle of adjustment of the position of pointer 10 on angle measurement marking 11, observe the position of angle measurement marking 11 according to the angle of foundation ditch lateral wall, the accuracy of rotation process has been improved, the steadiness of support has been improved.

Specifically, the inside wall threaded connection of bottom plate 8 has rag bolt 21, fixes through rag bolt 21, and is more convenient when fixed with first support 1 through bottom plate 8, has guaranteed the stability of foundation ditch work progress.

Specifically, the fixed mounting of the lower side wall symmetry of mount pad 9 has the strengthening nail 26, increases the steadiness of mount pad 9 through strengthening nail 26 to the stability of foundation ditch supporting process has been guaranteed.

Specifically, the lower side wall of the second bracket 2 is fixedly provided with a limiting block 5, the limiting block 5 is arranged at the position, close to the right side, of the surface of the second bracket 2, the position of the limiting block 5 prevents the extension frame 3 from moving too long, and the stability of the use process is guaranteed.

The auxiliary supporting device for foundation pit construction of the embodiment has the following working principle: the bottom plate 8 is fixed on the suitable position at foundation ditch edge firstly, then the position of second support 2 is adjusted according to the angle at foundation ditch edge, rotate trapezoidal axle 7, support pivoted trapezoidal axle 7 through two supporting seats 12, make surface threaded connection's movable seat 13 remove along the surface of trapezoidal axle 7 when trapezoidal axle 7 rotates, make movable seat 13 drive articulated transfer line 4's one end through first connecting seat 15 remove, make the other end of transfer line 4 drive second support 2 through articulated second connecting seat 14 remove, can be through the inside pivot 6 of first support 1 as the center rotation when second support 2 removes, remove second support 2 to laminating in the position of foundation ditch lateral wall according to the angle of foundation ditch lateral wall, adjust according to the shape of foundation ditch inner wall, the laminating degree with the foundation ditch inner wall has been improved, when second support 2 length needs the adjustment, slide extension frame 3 in the surface of second support 2, through extension frame 3 guarantee the length of support, after the suitable length is adjusted to extension frame 3, rotate joint bolt 18 in the inside of fixing base 17, with the joint 18 card in correspondence at the extension frame 3, thereby take the position of second support 2 is carried at the second support 2, thereby the folding support 2 is carried to the position of second support 2, the stability is guaranteed, the construction personnel is carried to the folding process, thereby, the stability is convenient.

Example 2

1-3, when the movable seat 13 drives one end of the transmission rod 4 to move, the movable seat 13 drives the guide wheel 33 to be attached to the inner wall of the movable groove 19 through the connecting frame 32 to slide, so that the stability of the movable seat 13 in the moving process is ensured, the stability of the transmission rod 4 is ensured, a circle of sliding groove 30 is formed in the outer surface of the sliding block 29, the shape of the sliding groove 30 corresponds to that of the rolling balls 31, the rolling balls 31 are enabled to be attached to the inner wall of the extension frame 3 to slide after being embedded in the sliding groove 30, and when the length of the extension frame 3 is adjusted, the extension frame 3 is enabled to be attached to the outer surfaces of the two rolling balls 31 to slide, and the stability of the moving process of the extension frame 3 is ensured, so that the stability of the foundation pit supporting process is ensured.

Example 2

1-3, when supporting the foundation pit, the nuts 24 on the outer surface of the limit bolts 25 are respectively taken down, then the limit bolts 25 are used as centers to rotate, the second connecting blocks 27 are rotated on the outer surfaces of the first connecting blocks 23, the mounting seat 9 is adjusted to be at the position which is level with the mounting surface in the foundation pit through the second connecting blocks 27, then the nuts 24 are screwed on the outer surfaces of the limit bolts 25, the first connecting blocks 23 and the second connecting blocks 27 are elastically deformed through the locking of the nuts 24 and the limit bolts 25, so that the position of the mounting seat 9 is locked, the mounting seat 9 is fixed on the ground, the stability of the first bracket 1 is increased through the reinforcing rods 22 on the two sides of the first bracket 2, the stability of the foundation pit construction process is ensured, and the safety of the construction process is ensured.

Claims (9)

1. Auxiliary support device of foundation ditch construction, including first support (1), its characterized in that: the upper end of the first bracket (1) is rotationally connected with a second bracket (2) through a rotating shaft (6), the side wall of the second bracket (2) is fixedly provided with a sliding block (29), the sliding block (29) is slidingly connected with the inner side wall of the extension frame (3), the second bracket (2) penetrates through the side wall of the extension frame (3) and extends to the outside, the side wall of the extension frame (3) is fixedly provided with a fixing seat (17), the inner side wall of the fixing seat (17) is in threaded connection with a clamping bolt (18), the upper side wall of the second bracket (2) is uniformly provided with a plurality of threaded holes (28), the threaded holes (28) are corresponding to the clamping bolt (18), the side wall of the first bracket (1) is symmetrically connected with a trapezoid shaft (7) through a supporting seat (12) in a rotating manner, the outer side wall of the trapezoid shaft (7) is provided with an external thread (20), the outer side wall of the trapezoid shaft (7) is in threaded connection with a movable seat (13), the side wall of the movable seat (13) is fixedly provided with a clamping bolt (18), the upper side wall of the fixing seat (17) is uniformly provided with a plurality of threaded holes (28), the threaded holes (28) of the first connecting rod (15) is provided with a rotating seat (14) through the rotating seat (4), the second connecting seat (14) is fixedly arranged on the side wall of the second bracket (2), and the bottom plate (8) is fixedly arranged on the lower side wall of the first bracket (1).

2. The auxiliary supporting device for foundation pit construction according to claim 1, wherein the front side wall of the first bracket (1) is provided with a movable groove (19), the inner side wall of the movable groove (19) is slidably connected with a guide wheel (33), the guide wheel (33) is movably connected with the outer side wall of the connecting frame (32), and the connecting frame (32) is fixedly arranged on the side wall of the movable seat (13).

3. The auxiliary supporting device for foundation pit construction according to claim 1, wherein a sliding groove (30) is circumferentially formed in the outer side wall of the sliding block (29), balls (31) are symmetrically connected to the inner side wall of the sliding groove (30) in a sliding manner, and the two balls (31) are symmetrically connected to the inner side wall of the extension frame (3) in a sliding manner.

4. The auxiliary supporting device for foundation pit construction according to claim 1, wherein one end of a reinforcing rod (22) is symmetrically and fixedly arranged on the side wall of the first support (1), a first connecting block (23) is fixedly arranged at the other end of the reinforcing rod (22), the first connecting block (23) is rotationally connected to the inner side wall of a second connecting block (27), the second connecting block (27) is fixedly arranged on the upper side wall of the mounting seat (9), a limit bolt (25) is rotationally connected to the inner cavity of the first connecting block (23) and the inner cavity of the second connecting block (27), and a nut (24) is in threaded connection with the outer side wall of the limit bolt (25).

5. The auxiliary supporting device for foundation pit construction according to claim 1, wherein the side walls of the first bracket (1), the second bracket (2) and the extension bracket (3) are uniformly provided with connecting holes (16).

6. The auxiliary supporting device for foundation pit construction according to claim 1, wherein an angle measuring marking (11) is arranged on the outer side wall of the first support (1), the angle measuring marking (11) is arranged on the outer side wall of the rotating shaft (6), a pointer (10) is fixedly arranged on the front side wall of the rotating shaft (6), and the pointer (10) corresponds to the angle measuring marking (11).

7. An auxiliary support device for foundation pit construction according to claim 1, wherein the inner side wall of the bottom plate (8) is screwed with anchor bolts (21).

8. An auxiliary support device for foundation pit construction according to claim 4, wherein the lower side wall of the mounting base (9) is symmetrically and fixedly provided with reinforcing nails (26).

9. The auxiliary supporting device for foundation pit construction according to claim 1, wherein a limiting block (5) is fixedly arranged on the lower side wall of the second bracket (2).