Foundation pit supporting device and mounting method thereof

Abstract

The invention provides a foundation pit supporting device and an installation method thereof. The foundation pit supporting device comprises a baffle structure, a reinforcing piece and a base. The baffle structure comprises two or more protective baffles, and the bottom ends of the protective baffles are provided with first inserting pieces used for fixing the protective baffles and a soil body. Reinforcing pieces are assembled on the inner side faces of the baffle structures. First strip-shaped holes are formed in the connecting positions of the protective baffles and the first inserting pieces, the bottoms of the protective baffles are connected with bases, the bases comprise vertical plates which are fixedly connected, the front sides and the rear sides of the bottoms of the vertical plates are connected with inserting plates and supporting plates respectively, and the inserting plates are connected with the corresponding protective baffles in an inserting mode through the first strip-shaped holes; elastic supporting pieces are assembled among the bottom of the inner side face of the protection baffle, the inner side face of the vertical plate and the top face of the supporting plate. A second inserting piece used for fixing the bottom plate and the soil body is assembled on the supporting plate. The method has the advantages of being rapid in laying construction, large in rigidity of the protective baffle, high in anti-overturning capacity and the like.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit construction, and in particular to a foundation pit supporting device and an installation method thereof. Background Art

[0002] At present, in many infrastructure and construction projects, foundation pit excavation is the basic or preliminary work, which lays the foundation and conditions for the subsequent main project construction. After the foundation pit is excavated, the foundation pit needs to be supported in time to ensure the safety of the main project construction. However, since the foundation pit is generally the topsoil layer, the soil is soft and has poor self-stability, it is easy to become unstable and collapse after the foundation pit is excavated.

[0003] The current foundation pit support method generally involves concrete support at the outer edge or periphery of the foundation pit, such as underground continuous guide walls or underground continuous retaining walls, etc.; or retaining board support with support baffles and wooden or steel diagonal braces. When concrete support is used, the concrete construction and solidification time is relatively long, during which the foundation pit is likely to become unstable. When using support baffles as retaining boards for foundation pit support, although it is more timely, due to the relatively thin size and thickness of the board, it is difficult to effectively resist the soil pressure at the boundary of the foundation pit and the torque formed by the soil pressure. Even with the addition of diagonal braces, it is only reinforced at certain points, and it is difficult to fully reinforce the support baffles. The slope at the boundary of the foundation pit is still prone to instability and collapse.

[0004] Therefore, there is currently a lack of a foundation pit support structure that can be quickly deployed and can provide comprehensive support effects. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned background technology and provide a foundation pit support device and an installation method thereof that can be quickly deployed for construction, has a large rigidity of the protective baffle plate and a strong anti-overturning ability.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A foundation pit support device, which has the structural characteristics of comprising a baffle structure, a reinforcement member and a base; the baffle structure comprises two or more protective baffles, the bottom end of the protective baffle is provided with a first insert for fixing the protective baffle to the soil, the left and right ends of the protective baffle are both provided with connecting parts, and two adjacent protective baffles are assembled and connected by a plurality of groups of connecting parts;

[0008] The inner side surface of the baffle structure is equipped with the reinforcement member;

[0009] A first strip hole is provided at the connection between the protective baffle and the first insert, the bottom of each protective baffle is connected to the base, the base comprises a vertical plate, the front and rear sides of the bottom of the vertical plate are respectively connected to a plug-in plate and a support plate, the plug-in plate is plugged and connected to the corresponding protective baffle through the first strip hole;

[0010] An elastic support member is installed between the bottom of the inner side surface of the protective baffle, the inner side surface of the vertical plate, and the top surface of the support plate;

[0011] The support plate is equipped with a second insert for fixing the support plate to the soil.

[0012] Furthermore, two or more supporting handles are vertically spaced apart on the inner side surface of the protective baffle; the reinforcement includes a horizontal reinforcement and a vertical reinforcement, the supporting end of the supporting handle is equipped with the corresponding horizontal reinforcement, and the vertical reinforcement is installed between two adjacent horizontal reinforcements.

[0013] Furthermore, the supporting handle includes a first connecting end fixedly arranged on the inner side surface of the protective baffle, the first connecting end is movably connected to two handles, the inner side walls of the two handles are provided with parallel and opposite inner recessed holes, and a retractable and fixed support rod is installed between the bottom end surfaces of the two inner recessed holes.

[0014] Furthermore, the horizontal reinforcement is provided with inwardly-opened slots at the top and bottom thereof; the vertical reinforcement is a telescopically fixed reinforcement, and the vertical reinforcement is provided with connecting ends at the top and bottom thereof for being snap-connected with the slots.

[0015] Furthermore, the vertical reinforcement includes a first vertical plate and a second vertical plate, the first vertical plate is provided with a vertical channel inside, the second vertical plate is socketed with the first vertical plate through the vertical channel, and an adjustment structure for adjusting and fixing the socket length of the second vertical plate and the first vertical plate is provided between the first vertical plate and the second vertical plate.

[0016] Furthermore, the adjustment structure includes a second strip hole opened on the first vertical plate, a connecting hole opened on the second vertical plate, a screw and a knob, one end of the screw passes through the second strip hole and is connected to the connecting hole, and the other end of the screw is placed on the outside of the first vertical plate and is connected to the knob.

[0017] Furthermore, a first hinged end is fixedly provided at the bottom of the inner side surface of the support baffle, a second hinged end is provided at the connection between the support plate and the vertical plate, and a third hinged end is provided at the top of the rear side of the support plate; the elastic support member includes a hinge part and two fixed hinge rods and a hydraulic hinge rod assembled and connected to the hinge part, and the hydraulic hinge rod is provided between the two fixed hinge rods; the elastic support member is assembled and connected between the first hinged end, the second hinged end and the third hinged end.

[0018] Furthermore, the first insert is a ground insert.

[0019] Furthermore, a through hole is provided at the rear end of the support plate to facilitate installation of the second insert; the second insert is a ground nail.

[0020] Based on the same inventive concept, the present invention also provides a method for installing a foundation pit support device, which comprises the following steps:

[0021] Step 1: Install the protective baffles. After the foundation pit is excavated, two or more protective baffles are placed close to the edge of the foundation pit and vertically inserted into the soil one by one to the designed position, and two adjacent protective baffles are assembled and connected through several groups of connecting parts;

[0022] Step 2: insert the plug-in board of each base into the first strip hole of the corresponding protective baffle, and insert the second insert of the base into the soil;

[0023] Step 3: Assemble the reinforcement member on the inner side of the baffle structure;

[0024] Step 4: Assemble the elastic support member between the bottom of the inner side surface of the protective baffle, the inner side surface of the vertical plate, and the top surface of the support plate.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) When laying out the foundation pit support structure of the present invention, there are mainly several steps: inserting the protective baffle, plugging and fixing the base, laying out the reinforcement, and installing and fixing the elastic support. The components are all pre-made of steel materials, and the installation steps are relatively small. The structure can be quickly overlapped and constructed in a modular manner. The construction is convenient and fast, and the structure can be laid out before the foundation pit undergoes large deformation and instability. It is a rapid support structure.

[0027] (ii) The foundation pit support structure of the present invention has a base support and a protective baffle combined with a ground plug at the bottom to form a multi-directional three-dimensional stable bottom support; the horizontal reinforcement members and the vertical reinforcement members form a three-dimensional rigid reinforced support structure that crosses the horizontal and vertical directions behind the protective baffle, which has a stronger ability to resist the lateral overturning force and overturning moment at the edge of the foundation pit. Therefore, the support structure of the present invention has a stronger ability to resist the deformation and compression of the foundation pit slope and is more stable.

[0028] (III) The foundation pit support structure of the present invention not only has the ground-inserted rigid compression resistance of the base and the protective baffle, but also has the hyperstatic flexible elastic pressure relief formed by the elastic support parts. Moreover, the elastic support parts of the hyperstatic structure are respectively connected to the three hinged ends of the protective baffle and the base, which can achieve the effect of more stability with more pressure. Therefore, the support structure of the present invention not only has stronger rigid support, but also has the function of flexibility and elastic pressure relief, thereby maintaining the stability and safety of the foundation pit from more aspects and angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of a foundation pit support structure in one embodiment of the present invention;

[0030] Figure 2 A side view of a foundation pit support structure in one embodiment of the present invention;

[0031] Figure 3 A front view of a vertical reinforcement member in one embodiment of the present invention;

[0032] Figure 4 A side view of a vertical reinforcement member in one embodiment of the present invention;

[0033] Figure 5 A front view of a base in one embodiment of the present invention;

[0034] Figure 6 A side view of a base in one embodiment of the present invention;

[0035] Figure 7 A top view of a base in one embodiment of the present invention;

[0036] Figure 8 This is a schematic structural diagram of an elastic support member in an embodiment of the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of a support handle in one embodiment of the present invention;

[0038] Fig.10 The figure is a schematic diagram of the structure of a support rod in an embodiment of the present invention.

[0039] In the figure:

[0040] 1. protective baffle; 11. connecting portion; 12. first insert; 13. first strip hole; 14. supporting handle; 141. first connecting portion; 142. handle; 143. inner concave hole; 144. supporting rod; 1441. threaded rod; 1442. threaded cavity;

[0041] 2. Horizontal reinforcement; 21. Card slot;

[0042] 3. Vertical reinforcement; 31. First vertical plate; 32. Vertical channel; 33. Second vertical plate; 34. Second strip hole; 35. Knob; 36. Screw;

[0043] 4. Base; 41. Vertical plate; 42. Plug-in plate; 43. Support plate; 44. Through hole;

[0044] 5. Elastic support member; 51. Articulated portion; 52. Fixed hinge rod; 53. Hydraulic hinge rod; 54. Round hole;

[0045] 6. Second insert; 7. First hinged end; 8. Second hinged end; 9. Third hinged end. DETAILED DESCRIPTION

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0047] like Figure 1-Figure 10 As shown, this embodiment provides a foundation pit supporting device including a baffle structure, a reinforcement and a base 4.

[0048] The baffle structure includes two or more protective baffles 1. In this embodiment, the protective baffle 1 is a matrix plate with a width of 3 to 5 meters and a length of 4 to 6 meters. The bottom end of the protective baffle 1 is provided with a first insert 12 for fixing the protective baffle 1 to the soil. The left and right ends of the protective baffle 1 are provided with connecting parts 11, and two adjacent protective baffles 1 are assembled and connected by a plurality of groups of connecting parts 11. In this embodiment, the connecting part 11 is a right-angled rectangular side buckle plate.

[0049] The inner side surface of the baffle structure is equipped with the reinforcement member.

[0050] A first strip hole 13 is formed at the connection between the protective baffle 1 and the first insert 12. In the present embodiment, the first strip hole 13 has a length of 20 to 40 cm and a width of 5 cm.

[0051] The bottom of the protective baffle 1 is connected to the base 4, and the base 4 includes a vertical plate 41. The front and rear sides of the bottom of the vertical plate 41 are respectively connected to a plug-in plate 42 and a support plate 43. The plug-in plate 42 is plug-connected to the corresponding protective baffle 1 through the first strip hole 13.

[0052] The plug board 42 is a flat plate with a length of 50 to 80 cm, a thin front end and a thick rear end, and its width and thickness are consistent with the length and width of the first strip hole 13, so that the plug board 42 can be plugged into the first strip hole 13. The length and width of the support plate 43 are both 80 to 120 cm. The width of the vertical plate 41 is consistent with the width of the support plate 43, and the height is 80 to 120 cm.

[0053] An elastic support member 5 is installed between the bottom of the inner side surface of the protective baffle 1 , the inner side surface of the vertical plate 41 , and the top surface of the support plate 43 .

[0054] The support plate 43 is equipped with a second insert 6 for fixing the support plate 43 to the soil.

[0055] like Figure 1-Figure 2 , Figure 9-10 As shown, in this embodiment, two or more support handles 14 are vertically spaced apart on the inner side of the protective baffle 1; the reinforcement member includes a horizontal reinforcement member 2 and a vertical reinforcement member 3, and the corresponding horizontal reinforcement member 2 is mounted on the supporting end of the support handle 14, and the vertical reinforcement member 3 is mounted between two adjacent horizontal reinforcement members 2. In this embodiment, the length of the horizontal reinforcement member 2 is 10m and the width is 0.3-0.5m. The width of the vertical reinforcement member 3 is 0.3-0.5m.

[0056] like Figure 9-10 As shown, the support handle 14 includes a first connection end 141 fixedly arranged on the inner side of the protective baffle 1. In this embodiment, the first connection end 141 is a semicircular hinge.

[0057] The first connection end 141 is movably connected to two handles 142, and the inner side walls of the two handles 142 are provided with parallel and opposite inner concave holes 143, and a retractable and fixed support rod 144 is installed between the bottom end surfaces of the two inner concave holes 143. The support rod 144 includes a threaded rod 1441 and a threaded cavity 1442 for assembly.

[0058] The horizontal reinforcement member 2 has a card slot 21 inwardly opened at the top and bottom. The vertical reinforcement member 3 is a telescopic fixed reinforcement member, and the vertical reinforcement member 3 has a connection end at the top and bottom thereof for card connection with the card slot 21. The connection end is 5 to 15 cm long and 2 cm thick.

[0059] like Figure 3-Figure 4As shown, in this embodiment, the vertical reinforcement 3 includes a first vertical plate 31 and a second vertical plate 33, the first vertical plate 31 is provided with a vertical channel 32 inside, the second vertical plate 33 is sleeved with the first vertical plate 31 through the vertical channel 32, and an adjustment structure for adjusting and fixing the sleeve length of the second vertical plate 33 and the first vertical plate 31 is provided between the first vertical plate 31 and the second vertical plate 33.

[0060] The adjustment structure includes a second strip hole 34 opened on the first vertical plate 31, a connecting hole opened on the second vertical plate 33, a screw 36 and a knob 35, one end of the screw 36 passes through the second strip hole 34 and is connected to the connecting hole, and the other end is placed on the outer side of the first vertical plate 31 and is connected to the knob 35.

[0061] like Figure 1-Figure 2 , Figure 5-Figure 8 As shown, in this embodiment, the first hinge end 7 is fixedly provided at the bottom of the inner side of the support baffle 1, the second hinge end 8 is provided at the connection between the support plate 43 and the vertical plate 41, and the third hinge end 9 is provided at the top of the rear side of the support plate 43; the elastic support member 5 includes a hinge portion 51 and two fixed hinge rods 52 and a hydraulic hinge rod 53 assembled and connected with the hinge portion 51, and the hydraulic hinge rod 53 is provided between the two fixed hinge rods 52; the elastic support member 5 is assembled and connected between the first hinge end 7, the second hinge end 8 and the third hinge end 9. The ends of the fixed hinge rod 52 and the hydraulic hinge rod 53 have round holes 54.

[0062] like Figure 1 and Figure 2 As shown, the first insert 12 is a ground plug having a length of about 1 m, a width of about 0.5 m and a pointed edge.

[0063] like Figure 1 and Figure 2 As shown, the rear end of the support plate 43 is provided with a through hole 44 for facilitating the installation of the second insert 6. The second insert 6 is a ground nail. The ground nail is a pointed cone with a thin lower part and a thick upper part, wherein the diameter of the lower part is smaller than the diameter of the through hole 44. The diameter of the upper part is larger than the diameter of the through hole 44.

[0064] like Figure 1-Figure 10 As shown, this embodiment also provides a method for installing a foundation pit support device, which includes the following steps:

[0065] Step 1: Install the protective baffles 1. After the foundation pit is excavated, two or more protective baffles 1 are placed close to the edge of the foundation pit and vertically inserted into the soil one by one to the designed position, and two adjacent protective baffles 1 are assembled and connected through several groups of connecting parts 11.

[0066] Specifically, after the foundation pit is excavated, two or more protective baffles 1 are quickly and closely attached to the edge of the foundation pit, and are vertically inserted into the ground one by one from the first inserting member 12, and the insertion depth into the ground is preferably such that the first inserting member 12 is just buried and the first strip-shaped hole 13 is exposed, so as to form a protective baffle structure in which the connecting parts 11 of each protective baffle 1 abut against each other and are connected in a row.

[0067] Step 2: Insert the plug-in board 42 of each base 4 into the first strip hole 13 of the corresponding protective baffle 1, and insert the second inserting member 6 of the base 4 into the soil.

[0068] Specifically, quickly insert the plug-in board 42 of the base 4 into the first strip hole 13 of each protective baffle 1 in turn, and nail the second insert 6 toward the ground along the through hole 44 of the base 4. At this time, the vertical plate 41 of the base 4 is required to be vertically upward and close to the protective baffle 1.

[0069] Step 3: Assemble the reinforcement on the inner side of the baffle structure.

[0070] Specifically, the two handles 142 of the support handle 14 on each protective baffle 1 are opened to a certain range in sequence, and then a plurality of horizontal reinforcements 2 are placed in series on the supporting end of the support handle 14 in sequence to form a plurality of long horizontal reinforcements in series, and then the two handles 142 on the support handle 14 are pressed. The relative positions of the threaded rod 1441 and the threaded cavity 1442 of the adjustable support rod 144 are adjusted to a suitable length by rotating the threaded rod 1441 and the threaded cavity 1442, and the two ends of the adjustable support rod 144 are respectively inserted into the inner concave holes 143 on each handle 142 to fix and press the two handles 142 of the support handle 14, and then fix and press the horizontal reinforcement 2 to ensure that the handle 142 strongly supports the horizontal reinforcement 2.

[0071] Insert the bottom plug-in end of the vertical reinforcement 3 into the top slot 21 of the lower horizontal reinforcement 2 at a certain distance in the horizontal direction between two rows of horizontal long reinforcements 2 separated by a certain distance. Then turn the knob 35, and drive the second vertical plate 33 connected by the screw 36 to move in the vertical channel 32 of the first vertical plate 31 through the movement of the knob 35, insert the top plug-in end of the first vertical plate 33 into the lower slot 21 of the upper horizontal reinforcement 2, and then tighten the knob 35 to fix the second vertical plate 33, and then fix the entire vertical reinforcement 3. The horizontal reinforcement 2 and the vertical reinforcement 3 are overlapped horizontally and vertically to connect each protective baffle 1 into a more complete whole, and strengthen its overall rigidity to resist the active soil pressure at the edge of the foundation pit.

[0072] Step 4: Assemble the elastic support member 5 between the bottom of the inner side surface of the protective baffle 1 , the inner side surface of the vertical plate 1 , and the top surface of the support plate 43 .

[0073] Specifically, the two fixed hinge rods 52 of the elastic support member 5 are respectively fixed to the first hinge end 7 on the protective baffle 1 and the third hinge end 7 on the support plate 43 of the base 4 by screws passing through the reaming holes and the round holes 54 on the fixed hinge rods 52; and the hydraulic hinge rod 53 is adjusted to a suitable length by hydraulic pressure, and then screws are passed through the second hinge end 8 in the middle of the intersection of the support plate 43 and the vertical plate 41 and fixed to the round hole 54 on the hydraulic hinge rod 53. In this way, a flexible and elastic support is formed for the protective baffle 1, which plays a role in slowly relieving pressure.

[0074] The present invention uses steel materials to prefabricate various components. After the foundation pit is excavated, it can be quickly assembled to form a protective baffle structure that is connected in rows. The support structure is laid out before the foundation pit is greatly deformed and unstable. There are few installation steps, and the construction is convenient and fast. In addition, the support structure of the present invention has multi-directional three-dimensional stable bottom supports such as ground plugs and bases. The horizontal reinforcement members and the vertical reinforcement members are overlapped to form a horizontal and vertical cross-three-dimensional rigid reinforced support structure, which has a stronger ability to resist the lateral overturning force and overturning moment at the edge of the foundation pit. In addition, the elastic support members form an over-static flexible elastic pressure relief. The stability and safety of the foundation pit are maintained from more aspects and more angles. In summary, the present invention is a support structure with fast construction speed, strong anti-overturning ability, and the ability to achieve multi-dimensional stability maintenance.

[0075] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments made by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A foundation pit support device, characterized in that: The invention comprises a baffle structure, a reinforcement and a base (4); the baffle structure comprises two or more protective baffles (1); the bottom end of the protective baffle (1) is provided with a first insert (12) for fixing the protective baffle (1) to the soil; the left and right ends of the protective baffle (1) are both provided with connecting parts (11); two adjacent protective baffles (1) are assembled and connected via a plurality of groups of connecting parts (11); The inner side surface of the baffle structure is equipped with the reinforcement member; A first strip-shaped hole (13) is provided at the connection between the protective baffle (1) and the first insert (12); the bottom of each protective baffle (1) is connected to the base (4); the base (4) comprises a vertical plate (41); the front and rear sides of the bottom of the vertical plate (41) are respectively connected to a plug-in plate (42) and a support plate (43); the plug-in plate (42) is plug-connected to the corresponding protective baffle (1) through the first strip-shaped hole (13); An elastic support member (5) is installed between the bottom of the inner side surface of the protective baffle (1), the inner side surface of the vertical plate (41), and the top surface of the support plate (43); The support plate (43) is equipped with a second insert (6) for fixing the support plate to the soil.

2. A foundation pit supporting device according to claim 1, characterized in that: The inner side surface of the protective baffle (1) is provided with two or more support handles (14) at vertical intervals; the reinforcement member comprises a horizontal reinforcement member (2) and a vertical reinforcement member (3); the supporting end of the support handle (14) is equipped with a corresponding horizontal reinforcement member (2), and the vertical reinforcement member (3) is equipped between two adjacent horizontal reinforcement members (2).

3. A foundation pit supporting device according to claim 2, characterized in that: The supporting handle (14) comprises a first connecting end (141) fixedly arranged on the inner side surface of the protective baffle (1), the first connecting end (141) being movably connected to two handles (142), the inner side walls of the two handles (142) being provided with parallel and opposite inner concave holes (143), and a retractable and fixed supporting rod (144) being mounted between the bottom end surfaces of the two inner concave holes (143).

4. A foundation pit supporting device according to claim 2, characterized in that: The horizontal reinforcement member (2) is provided with inwardly-opened slots (21) at the top and bottom thereof; the vertical reinforcement member (3) is a telescopically fixed reinforcement member, and the vertical reinforcement member (3) is provided with connecting ends at the top and bottom thereof for being clamped with the slots (21).

5. A foundation pit supporting device according to claim 4, characterized in that: The vertical reinforcement (3) comprises a first vertical plate (31) and a second vertical plate (33); a vertical channel (32) is provided inside the first vertical plate (31); the second vertical plate (33) is sleeved with the first vertical plate (31) through the vertical channel (32); and an adjustment structure for adjusting and fixing the sleeve length of the second vertical plate (33) and the first vertical plate (31) is provided between the first vertical plate (31) and the second vertical plate (33).

6. A foundation pit supporting device according to claim 5, characterized in that: The adjustment structure comprises a second strip hole (34) opened on the first vertical plate (31), a connecting hole opened on the second vertical plate (33), a screw (36) and a knob (35); one end of the screw (36) passes through the second strip hole (34) and is connected to the connecting hole, and the other end of the screw (36) is placed on the outer side of the first vertical plate (31) and is connected to the knob (35).

7. A foundation pit supporting device according to claim 1, characterized in that: A first hinge end (7) is fixedly provided at the bottom of the inner side surface of the support baffle (1); a second hinge end (8) is provided at the connection between the support plate (43) and the vertical plate (41); and a third hinge end (9) is provided at the top of the rear side of the support plate (43); the elastic support member (5) comprises a hinge portion (51), two fixed hinge rods (52) assembled and connected to the hinge portion (51), and a hydraulic hinge rod (53); the hydraulic hinge rod (53) is provided between the two fixed hinge rods (52); the elastic support member (5) is assembled and connected between the first hinge end (7), the second hinge end (8) and the third hinge end (9).

8. A foundation pit supporting device according to any one of claims 1 to 7, characterized in that: The first insert (12) is a ground insert.

9. A foundation pit supporting device according to any one of claims 1 to 7, characterized in that: A through hole (44) is provided at the rear end of the support plate (43) for facilitating installation of the second insert (6); The second insert (6) is a ground nail.

10. A method for installing a foundation pit support device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: installing the protective baffles (1). After the foundation pit is excavated, two or more protective baffles (1) are closely attached to the edge of the foundation pit and vertically inserted into the soil one by one to the designed position, and two adjacent protective baffles (1) are assembled and connected through a plurality of groups of connecting parts (11); Step 2: inserting the plug-in board (42) of each base (4) into the first strip hole (13) of the corresponding protective baffle (1), and inserting the second inserting member (6) of the base (4) into the soil; Step 3: Assemble the reinforcement member on the inner side of the baffle structure; Step 4: Assemble the elastic support member (5) between the bottom of the inner side surface of the protective baffle (1), the inner side surface of the vertical plate (1), and the top surface of the support plate (43).

Images