Supporting end, supporting device and foundation pit supporting construction method

Abstract

The invention discloses a supporting end, a supporting device and a foundation pit supporting construction method, and belongs to the technical field of foundation pit construction.The supporting end comprises a mounting base, a connecting assembly, a wedge-shaped plate and a plurality of supporting pieces, one side of the wedge-shaped plate in the thickness direction is a plane, and the other side of the wedge-shaped plate is an inclined plane; the included angle between the inclined face and the plane is strictly matched with the inclined angle of the foundation pit wall face, meanwhile, the plane of the wedge-shaped plate is attached to the connecting plate, the connecting plate is stably connected with the mounting base arranged on the outer surface of the output shaft in a sleeving mode through the multiple locking pieces, and the supporting pieces made of elastic materials are evenly distributed on the inclined face of the wedge-shaped plate. The driving mechanism can drive the mounting base to drive the multiple supporting pieces to abut against the wall face of the foundation pit. The supporting device comprises a supporting steel column, two driving mechanisms and two supporting ends, and the two supporting ends are correspondingly installed on output shafts of the two driving mechanisms. The foundation pit supporting construction method adopts the supporting device. The method is simple in construction, high in supporting stability and high in economic value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit construction, and in particular to a support end head, a support device and a foundation pit support construction method. BACKGROUND

[0002] With the continuous development of urban underground space, inclined wall foundation pits are increasingly widely used in special-shaped foundation pits and foundation pits adjacent to existing structures due to their advantages such as adaptability to mountainous terrain and reduction of space occupation of surrounding buildings. In such foundation pits, two opposite foundation pit walls are not arranged in parallel but are arranged at an angle, which puts forward higher requirements for the force transmission accuracy and wall adaptability of foundation pit support technology.

[0003] The prior art generally adopts a support scheme of pre-buried steel plates, support steel columns and driving mechanisms. The driving mechanisms are fixedly arranged at both ends of the length direction of the support steel columns, and the output shafts of the driving mechanisms directly abut against the pre-buried steel plates of the foundation pit walls. The rigid support of the support steel columns is used in combination with the support force applied by the output shafts of the driving mechanisms to offset the deformation caused by the stress release of the soil.

[0004] Due to the inclination of the foundation pit walls, the end of the output shaft of the driving mechanism cannot be effectively attached to the pre-buried steel plate, the support force transmission direction deviates from the inclination angle of the wall, and the axial force is deflected. This will cause the driving mechanism to bear additional lateral load, thereby causing safety hazards such as bending of the output shaft, and the stress direction of the support steel column will also deviate from the preset axis due to the deflection of the axial force, threatening the overall stability of the support system. Moreover, although the pre-buried steel plate serves as an intermediate carrier, it can increase the contact area between the end of the output shaft and the ground wall, and prevent the end of the output shaft from sinking into the ground wall due to excessive local pressure. However, the installation of the pre-buried steel plate not only increases the difficulty of work, but also cannot be reused, thereby increasing the construction cost.

[0005] Therefore, it is urgent to provide a support end head, a support device and a foundation pit support construction method to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a support end head, a support device and a foundation pit support construction method to solve the technical problems of poor support stability, low work efficiency and high construction cost in the prior art.

[0007] As conceived above, the technical solution adopted by the present application is as follows:

[0008] A support end head is installed on the output shaft of a driving mechanism, wherein the installation end head comprises:

[0009] A mounting seat is provided with a mounting groove and a plurality of connecting holes are circumferentially spaced around the mounting groove, and the mounting seat is sleeved on the outer surface of the output shaft through the mounting groove;

[0010] A connecting assembly includes a connecting plate and a plurality of locking members, the connecting plate is flat and has a plurality of threaded holes along the thickness direction, the plurality of threaded holes can be aligned with the plurality of connecting holes one by one, and the plurality of locking members can be correspondingly threaded into the plurality of connecting holes and screwed into the plurality of threaded holes one by one;

[0011] A wedge-shaped plate, opposite sides of the wedge-shaped plate along the thickness direction are provided with a flat surface on one side and an inclined surface on the other side, and the angle between the inclined surface and the flat surface is the same as the inclination angle of the foundation pit wall surface, the wedge-shaped plate is connected to the connecting plate, and the flat surface is attached to the connecting plate;

[0012] A plurality of supporting members, the supporting members are elastic, and the supporting members are uniformly arranged on the inclined surface, and the driving mechanism can drive the mounting seat to drive the supporting members to abut against the foundation pit wall surface.

[0013] Further, the supporting members are made of rubber material and are bonded to the inclined surface of the wedge-shaped plate by an adhesive.

[0014] Further, the surface of the supporting member in contact with the foundation pit wall surface is provided with a sawtooth or corrugated shape.

[0015] Further, the inclined surface of the wedge-shaped plate is provided with a plurality of positioning grooves, and the supporting members are inserted into the positioning grooves one by one and fixed by the adhesive.

[0016] Further, the connecting plate and the flat surface of the wedge-shaped plate are fixedly connected by an adhesive, and / or connected by a countersunk screw.

[0017] Further, the locking member includes a double-headed stud and a locking nut, one end of the double-headed stud is screwed into the threaded hole, the other end passes through the connecting hole of the mounting seat and is locked by the locking nut.

[0018] Further, the top surface of the wedge-shaped plate is rectangular, and the supporting members can be arranged in an array along the length and width of the top surface of the wedge-shaped plate.

[0019] Further, the connecting plate and the wedge-shaped plate are made of steel.

[0020] The support device comprises a support steel column, two driving mechanisms and two support end heads, the two driving mechanisms are fixedly connected to the two ends of the support steel column in the length direction, the two support end heads are correspondingly installed on the output shafts of the two driving mechanisms, and the two driving mechanisms can correspondingly drive the two support end heads to abut against the two oppositely arranged foundation pit wall surfaces.

[0021] The foundation pit supporting construction method is characterized in that the supporting device is used, and the method comprises the following steps:

[0022] S1, two driving mechanisms are fixed at both ends of the supporting steel column, the output shaft is collinear with the axis of the supporting steel column, and the mounting seat is sleeved on the output shaft through the mounting slot;

[0023] S2, according to the inclination angle of the foundation pit wall surface, a wedge-shaped plate with a matching included angle is selected, the wedge-shaped plate is flatly attached to the connecting plate and fixed, the threaded holes of the connecting plate are aligned with the mounting seat connecting holes, and the locking pieces are fastened to complete the supporting end head assembly;

[0024] S3, the supporting device is hoisted to the preset position, and the two end wedge-shaped plates are adjusted to be inclined to the foundation pit wall surface;

[0025] S4, the driving mechanism is started, the output shaft is driven to move the supporting end head, and the supporting pieces on the two wedge-shaped plates are tightly pressed against the foundation pit wall surfaces on both sides.

[0026] The foundation pit supporting construction method has the beneficial effects that:

[0027] The supporting end head has the following beneficial effects that: the wedge-shaped plate has one side as a plane and the other side as an inclined surface along the thickness direction, the included angle between the inclined surface and the plane is strictly matched with the inclination angle of the foundation pit wall surface, the plane of the wedge-shaped plate is attached to the connecting plate, the connecting plate is stably connected with the mounting seat sleeved on the outer surface of the output shaft through the plurality of locking pieces, and the elastic supporting pieces are uniformly distributed on the inclined surface of the wedge-shaped plate. When the driving mechanism drives the mounting seat to abut against the foundation pit wall surface, the inclined surface of the wedge-shaped plate is accurately matched with the foundation pit wall surface, the supporting force transmission direction is completely consistent with the inclination angle of the foundation pit wall surface, the elastic supporting pieces can compensate the slight flatness error of the foundation pit wall surface through self-deformation, further eliminate the fitting gap between the supporting end head and the foundation pit wall surface, strengthen the uniformity of the supporting force transmission, and avoid the bending hidden danger of the output shaft caused by uneven stress. In addition, the elastic characteristic of the elastic supporting pieces can buffer the instantaneous impact load in the soil stress release process to prevent the output shaft from sinking into the foundation pit wall surface, so that the pre-buried steel plate does not need to be installed on the foundation pit wall surface, the construction difficulty is reduced, the supporting end head can be repeatedly used, and the economic value is high. In addition, the deformation ability of the elastic supporting pieces can also adapt to the slight deformation of the soil in the foundation pit excavation process, the stable supporting force is maintained through the continuous elastic feedback, the supporting failure caused by the slight displacement of the soil is avoided, and the dynamic adaptability of the supporting system is further improved.

[0028] The support device provided by the application can realize synchronous and stable support of two opposite foundation pit wall surfaces by fixing two driving mechanisms at both ends of the support steel column and installing the support end head, the support steel column provides a rigid bearing foundation, the driving mechanism drives the support end head to accurately abut against the foundation pit wall surface, the wedge-shaped plate angle of the support end head and the elastic buffer of the support piece ensure that the support force is accurately and uniformly applied to the foundation pit wall surface, and the symmetrical support structure at both ends can balance the stress of the soil on both sides of the foundation pit and improve the overall stability of the support system.

[0029] The foundation pit support construction method provided by the application can ensure the accurate assembly of the driving mechanism, the support steel column and the mounting seat through step S1, lay a foundation for stable force transmission, S2 selects an adaptive wedge-shaped plate according to the included angle of the foundation pit wall surface and standardizes the assembly of the support end head to avoid the influence of angle deviation on the support effect, and S3 and S4 realize the rapid positioning and accurate support of the support device through hoisting and driving, the overall process does not need to pre-bury steel plates, is simple to operate and suitable for inclined foundation pit wall surfaces, can ensure that the support force is accurately and uniformly applied, effectively control the deformation of the foundation pit, improve the construction efficiency and reduce the construction difficulty, and ensure the stability and reliability of the support system. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the support end head provided by the embodiment of the application;

[0031] Figure 2 is a top view of the support end head provided by the embodiment of the application;

[0032] Figure 3 is a bottom view of the support end head provided by the embodiment of the application;

[0033] Figure 4 is a top view of the support device and the foundation pit provided by the embodiment of the application.

[0034] In the drawings:

[0035] 1, mounting seat;

[0036] 2, connecting assembly; 21, connecting plate; 22, locking piece; 221, double-headed stud; 222, locking nut;

[0037] 3, wedge-shaped plate;

[0038] 4, support piece;

[0039] 100, driving mechanism; 101, output shaft;

[0040] 200, support steel column;

[0041] 1000, foundation pit wall surface. DETAILED DESCRIPTION

[0042] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of clarity, only those structures related to the application are shown in the drawings.

[0043] In the description of the application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] In the description of the present embodiment, the terms "upper", "lower", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the purpose of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0047] As Figures 1-4As shown, the present application provides a support end, mounted on the output shaft 101 of the driving mechanism 100, comprising a mounting seat 1, a connecting assembly 2, a wedge-shaped plate 3 and a plurality of supporting members 4; the mounting seat 1 is provided with a mounting groove and a plurality of connecting holes penetrating through the thickness direction, the plurality of connecting holes are circumferentially spaced apart around the mounting groove, and the mounting seat 1 is sleeved on the outer surface of the output shaft 101 through the mounting groove; the connecting assembly 2 comprises a connecting plate 21 and a plurality of locking members 22, the connecting plate 21 is flat and provided with a plurality of threaded holes penetrating through the thickness direction, the plurality of threaded holes can be aligned with the plurality of connecting holes one by one, and the plurality of locking members 22 can be correspondingly threaded in the plurality of connecting holes and correspondingly screwed in the plurality of threaded holes; the wedge-shaped plate 3 is provided with a plane on one side and an inclined surface on the other side along the thickness direction, the included angle between the inclined surface and the plane is the same as the inclination angle of the foundation pit wall surface 1000, the wedge-shaped plate 3 is connected to the connecting plate 21, and the plane is attached to the connecting plate 21; the supporting member 4 has elasticity, and a plurality of supporting members 4 are evenly arranged on the inclined surface, and the driving mechanism 100 can drive the mounting seat 1 to drive the plurality of supporting members 4 to abut against the foundation pit wall surface 1000.

[0048] The wedge-shaped plate 3 provided by the present application has one side as a plane and the other side as an inclined surface along the thickness direction, and the included angle between the inclined surface and the plane strictly matches the inclination angle of the foundation pit wall surface 1000, and at the same time, the plane of the wedge-shaped plate 3 is attached to the connecting plate 21, and the connecting plate 21 is stably connected with the mounting seat 1 sleeved on the outer surface of the output shaft 101 through the plurality of locking members 22, and the supporting members 4 of elastic material are evenly distributed on the inclined surface of the wedge-shaped plate 3, when the driving mechanism 100 drives the mounting seat 1 to abut against the foundation pit wall surface 1000, the inclined surface of the wedge-shaped plate 3 precisely matches the foundation pit wall surface 1000, ensuring that the support force transmission direction is completely consistent with the inclination angle of the foundation pit wall surface 1000, and the elastic supporting member 4 can compensate for the slight flatness error of the foundation pit wall surface 1000 through its own deformation, further eliminating the fitting gap between the support end and the foundation pit wall surface 1000, and strengthening the uniformity of support force transmission, avoiding the bending risk of the output shaft 101 caused by uneven stress; secondly, the elastic characteristic of the elastic supporting member 4 can buffer the instantaneous impact load in the soil stress release process to prevent the output shaft 101 from sinking into the foundation pit wall surface 1000, so it is not necessary to install a pre-embedded steel plate on the foundation pit wall surface 1000, reducing the construction difficulty, and the support end can be reused, with high economic value; in addition, the deformation ability of the elastic supporting member 4 can also adapt to the slight deformation of the soil during the foundation pit excavation process, and the stable support force is maintained through continuous elastic feedback, avoiding support failure caused by slight displacement of the soil, and further improving the dynamic adaptability of the support system.

[0049] In the present embodiment, the included angle between the inclined surface and the plane of the wedge-shaped plate is 3°, and the inclination angle of the foundation pit wall surface 1000 is also 3°.

[0050] Specifically, the support 4 is made of rubber material and is bonded to the inclined surface of the wedge-shaped plate 3 by an adhesive. The support 4 made of rubber material not only has excellent elastic recovery and compression fatigue resistance, but also has a high friction coefficient that can reduce the risk of relative sliding with the foundation wall surface 1000, and the flexible nature can conform to the loose soil layer or local protrusions of the foundation wall surface 1000; and the adhesive fixing method can achieve seamless fitting of the support 4 and the wedge-shaped plate 3, ensuring uniform transmission of support force.

[0051] In the present embodiment, the adhesive is a two-component epoxy resin adhesive, which has excellent bonding strength and chemical corrosion resistance.

[0052] In other embodiments, the adhesive can also be a polyurethane-modified acrylic adhesive. It should be noted that both the two-component epoxy resin adhesive and the polyurethane-modified acrylic adhesive are commonly used adhesives in the art.

[0053] More specifically, the surface of the support 4 in contact with the foundation wall surface 1000 is provided with a sawtooth or corrugated shape. The sawtooth or corrugated contact surface can further increase the contact area and frictional resistance between the support 4 and the foundation wall surface 1000, especially for the loose soil layer or local protrusions of the foundation wall surface 1000, the corrugated or sawtooth structure can be embedded in the surface soil or conform to the protrusion profile, further reducing the risk of relative sliding.

[0054] More specifically, the inclined surface of the wedge-shaped plate 3 is provided with a plurality of positioning grooves, and a plurality of supports 4 are inserted one by one into the plurality of positioning grooves and fixed by an adhesive. The positioning grooves of the wedge-shaped plate 3 can pre-limit the position of the supports 4, ensuring that the plurality of supports 4 are evenly distributed on the inclined surface, avoiding deviation during the bonding process, and the positioning grooves can increase the contact area between the supports 4 and the wedge-shaped plate 3, allowing the adhesive to be filled more fully, increasing the fixing strength, adapting to the underground humid and corrosive environment, and effectively preventing the supports 4 from falling off due to long-term stress or environmental influences.

[0055] Specifically, as shown in FIG. 6, the support 4 is provided with a plurality of positioning protrusions 41, and the wedge-shaped plate 3 is provided with a plurality of positioning grooves 31 corresponding to the plurality of positioning protrusions 41. The positioning protrusions 41 of the support 4 are inserted into the positioning grooves 31 of the wedge-shaped plate 3, and the adhesive is filled in the gaps between the positioning protrusions 41 and the positioning grooves 31 to fix the support 4 to the wedge-shaped plate 3. Figure 1As shown, the connecting plate 21 is fixedly connected with the plane of the wedge-shaped plate 3 by an adhesive, and / or by a countersunk screw. With adhesive connection, seamless fitting of the connecting plate 21 and the plane of the wedge-shaped plate 3 can be achieved by means of the adhesive, and there is no need for additional processing of complex connection structures, simplifying the construction process. With countersunk screw connection, the countersunk design can avoid interference of the screw head with the force transmission of the wedge-shaped plate 3, and the rigid connection of the screw can provide stable shear resistance, especially suitable for scenarios with large foundation pit depth and high soil pressure, ensuring that the connecting plate 21 and the wedge-shaped plate 3 do not displace relative to each other under strong load. The combined connection method of adhesive and countersunk screw can achieve both flexible fitting and rigid shear resistance, with the adhesive filling gaps and dispersing stress, and the countersunk screw strengthening overall uplift and shear resistance, and the two methods working together can adapt to different geological conditions and load requirements.

[0056] The adhesive between the connecting plate 21 and the plane of the wedge-shaped plate 3 can be the same two-component epoxy resin adhesive or polyurethane modified acrylic adhesive as that used to connect the support 4, ensuring material compatibility.

[0057] Specifically, as shown in Figure 1 The locking member 22 includes a stud 221 and a locking nut 222, one end of the stud 221 is screwed into the threaded hole, the other end passes through the connecting hole of the mounting seat 1 and is locked by the locking nut 222. By rotating the locking nut 222, the compression degree of the stud 221 can be accurately controlled, facilitating adjustment of the fitting gap between the mounting seat 1 and the connecting plate 21 during installation, and ensuring close contact between the two.

[0058] Specifically, as shown in Figure 2 and Figure 4 The top surface of the wedge-shaped plate 3 is rectangular, and a plurality of supports 4 can be arranged in an array along the length and width of the top surface of the wedge-shaped plate 3. The rectangular top surface has a regular boundary and a symmetrical geometric shape, which can provide a precise positioning reference for the arrayed arrangement of the supports 4, ensuring that adjacent supports 4 maintain uniform spacing in the length and width directions, and allowing the rubber supports 4 to evenly distribute the support force to the rectangular contact area of the foundation pit wall 1000 when abutting against the foundation pit wall 1000.

[0059] Specifically, the connecting plate 21 and the wedge-shaped plate 3 are both made of steel. Steel has excellent rigidity and shear resistance, and can withstand the large support force transmitted by the output shaft 101 of the driving mechanism 100 without deforming, ensuring that the force transmission path from the mounting seat 1 to the connecting plate 21 and then to the wedge-shaped plate 3 is always stable.

[0060] As shown in Figure 4As shown, the application also provides a support device, comprising a support steel column 200, two driving mechanisms 100 and the above-mentioned support end, the two driving mechanisms 100 are fixedly connected to the two ends of the support steel column 200 in the length direction, and the two support ends are correspondingly installed on the output shafts 101 of the two driving mechanisms 100, and the two driving mechanisms 100 can correspondingly drive the two support ends to abut against the two oppositely arranged foundation pit wall surfaces 1000.

[0061] By fixing the two driving mechanisms 200 at the two ends of the support steel column 200 and correspondingly installing the above-mentioned support end, synchronous and stable support of the two opposite foundation pit wall surfaces 1000 can be realized, the support steel column 200 provides a rigid bearing foundation, and the driving mechanisms 100 drive the support end to precisely abut against the foundation pit wall surface 1000, which, by means of the angle adaptation of the wedge-shaped plate 3 and the elastic buffering of the rubber support 4, ensures that the support force is precisely and uniformly applied to the foundation pit wall surface 100, and can balance the soil stress on both sides of the foundation pit through the symmetrical support structure at the two ends, thereby improving the overall stability of the support system.

[0062] In this embodiment, the driving mechanism 100 is a hydraulic driving cylinder, which has the characteristics of large output force and precise stroke adjustment, can adapt to the large support force required by the foundation pit support, and can stably control the extension and retraction speed of the output shaft 101 through the hydraulic system, so as to avoid rigid impact between the support end and the foundation pit wall surface 1000, and the stability of the hydraulic drive is strong.

[0063] In other embodiments, the driving mechanism 100 can also be an electric push rod, which can precisely adjust the stroke of the output shaft 101 through the motor drive.

[0064] The application also provides a foundation pit support construction method, which adopts the above-mentioned support device, comprising:

[0065] S1, fixing the two driving mechanisms 100 at the two ends of the support steel column 200, making the output shafts 101 collinear with the axis of the support steel column 200, and sleeving the mounting seat 1 on the output shaft 101 through the mounting groove;

[0066] S2, selecting the wedge-shaped plate 3 matching the included angle according to the inclination angle of the foundation pit wall surface 1000, and fixing the wedge-shaped plate 3 by making the plane of the wedge-shaped plate 3 abut against the connecting plate 21, aligning the threaded holes of the connecting plate 21 with the connecting holes of the mounting seat 1, and fastening with the locking piece 22, to complete the assembly of the support end;

[0067] S3, hoisting the support device to the preset position, and adjusting the two wedge-shaped plates 3 to be perpendicular to the foundation pit wall surface 1000;

[0068] S4, starting the driving mechanism 100 to drive the output shaft 101 to move the support end, so that the support pieces 4 on the two wedge-shaped plates 3 abut against the foundation pit wall surfaces 1000 on both sides.

[0069] The accurate assembly of the driving mechanism 100 and the supporting steel column 200 and the mounting seat 1 is ensured through step S1, and the stable transmission of force is laid as a foundation; S2 is adapted to the wedge-shaped plate 3 according to the included angle of the foundation pit wall 1000 and standardizes the assembly of the supporting end, so that the angle deviation does not affect the supporting effect; S3 and S4 are driven to abut through hoisting positioning, the supporting device is quickly positioned and accurately supported, the overall process does not need to pre-bury a steel plate, is simple and convenient to operate and is suitable for the inclined foundation pit wall 1000, can guarantee that the supporting force is accurately and uniformly applied, effectively controls the deformation of the foundation pit, can improve the construction efficiency and reduce the construction difficulty and ensures that the supporting system is stable and reliable.

[0070] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A support tip mounted to an output shaft (101) of a drive mechanism (100), characterized in that, The support tip comprises: a mounting seat (1) having a mounting groove and a plurality of connecting holes circumferentially spaced around the mounting groove, the mounting seat (1) being sleeved on the outer surface of the output shaft (101) through the mounting groove; a connecting assembly (2) comprising a connecting plate (21) and a plurality of locking members (22), the connecting plate (21) being flat and having a plurality of threaded holes formed in the thickness direction, the plurality of threaded holes being aligned with the plurality of connecting holes one by one, and the plurality of locking members (22) being correspondingly threaded into the plurality of connecting holes and correspondingly screwed into the plurality of threaded holes; a wedge-shaped plate (3) having opposite sides in the thickness direction, one side being a flat surface and the other side being an inclined surface, the angle between the inclined surface and the flat surface being the same as the inclination angle of the foundation pit wall surface (100), the wedge-shaped plate (3) being connected to the connecting plate (21), and the flat surface being attached to the connecting plate (21); a plurality of supporting members (4) having elasticity, the plurality of supporting members (4) being uniformly arranged on the inclined surface, and the driving mechanism (100) being capable of driving the mounting seat (1) to drive the plurality of supporting members (4) to abut against the foundation pit wall surface (1000).

2. The support tip of claim 1, wherein The supporting member (4) is made of rubber material and is bonded to the inclined surface of the wedge-shaped plate (3) by an adhesive.

3. The support tip of claim 2, wherein, The surface of the supporting member (4) in contact with the foundation pit wall surface (1000) is provided in a sawtooth or corrugated shape.

4. The support tip of claim 2, wherein, The inclined surface of the wedge-shaped plate (3) is provided with a plurality of positioning grooves, and the plurality of supporting members (4) are correspondingly inserted into the plurality of positioning grooves and fixed by the adhesive.

5. The support tip of claim 1, wherein The connecting plate (21) and the flat surface of the wedge-shaped plate (3) are fixedly connected by an adhesive and / or connected by a countersunk screw.

6. The support tip of claim 1, wherein The locking member (22) comprises a double-headed stud (221) and a locking nut (222), one end of the double-headed stud (221) being screwed into the threaded hole, the other end being threaded through the connecting hole of the mounting seat (1) and being locked by the locking nut (222).

7. The support tip of any one of claims 1-6, wherein, The top surface of the wedge-shaped plate (3) is rectangular, and the plurality of supporting members (4) can be arranged in an array along the length and width directions of the top surface of the wedge-shaped plate (3).

8. The support tip of any one of claims 1-6, wherein, The connecting plate (21) and the wedge-shaped plate (3) are both made of steel.

9. Support device, characterized in that The support device comprises a support steel column (200), two driving mechanisms (100), and two support tips according to any one of claims 1-8, the two driving mechanisms (100) being fixedly connected to the two ends of the support steel column (200) in the length direction, the two support tips being correspondingly mounted on the output shafts (101) of the two driving mechanisms (100), and the two driving mechanisms (100) being capable of correspondingly driving the two support tips to abut against the two oppositely arranged foundation pit wall surfaces (1000).

10. A method of foundation pit support construction, characterized by, The support device according to claim 9 comprises: S1, two drive mechanisms (100) are fixed on both ends of the support steel column (200), the output shaft (101) is collinear with the axis of the support steel column (200), and the mounting seat (1) is sleeved on the output shaft (101) through the mounting groove; S2, according to the inclination angle of the foundation pit wall surface (1000), a wedge-shaped plate (3) matching the included angle is selected, the wedge-shaped plate (3) is flatly attached to the connecting plate (21) and fixed, the threaded holes of the connecting plate (21) are aligned with the connecting holes of the mounting seat (1), and the locking piece (22) is fastened to complete the support end assembly; S3, hoist the support device to the preset position, adjust the two end wedge-shaped plates (3) to be opposite to the foundation pit wall surface (1000); S4, start the drive mechanism (100), drive the output shaft (101) to drive the support end to move, so that the support pieces (4) on the two wedge-shaped plates (3) abut against the foundation pit wall surfaces (1000) on both sides.

Images