Anchoring device and method for foundation pit support

Abstract

The application belongs to the technical field of foundation pit support, and particularly discloses an anchoring device and method for foundation pit support. The anchoring device comprises an adjustable anchor rod body module, the adjustable anchor rod body module comprises a first rod body, a second rod body is slidably sleeved with the inner wall of the first rod body, a grouting hole is formed in the surface of the second rod body, the inner walls of the first rod body and the second rod body are fixedly sleeved with a first fixing frame and a second fixing frame respectively, a screw rod is rotatably sleeved with the inner wall of the first fixing frame, the surface of the screw rod is threadedly connected with the inner wall of the second fixing frame, and a driving mechanism for driving the screw rod to rotate is further arranged on the first rod body; the self-adapting direction-adjustable grouting module comprises a connecting pipe rotatably connected with the end of the first rod body, and the other end of the connecting pipe is provided with a grouting pipe. The application improves the flexibility and efficiency of construction, enhances the safety and reliability of the construction process, and also considers environmental protection and sustainability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of foundation pit support, more particularly, relates to an anchoring device and method for foundation pit support. BACKGROUND

[0002] The foundation pit is an important link of the foundation construction of a building, and is very important to the quality of the foundation and the entire building. The excavation of the foundation pit is a necessary and very important link of the building. In the process of excavating the foundation pit, the most likely problems are the collapse of the foundation pit and the damage to the surrounding geological structure. Either case will seriously affect the normal construction of the foundation pit. Therefore, protective measures need to be taken in advance. The foundation pit support technology is an effective protective measure. The foundation pit support is a support, reinforcement and protection measure for the side wall of the foundation pit and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment. The anchoring technology, that is, the anchor rod support technology, is commonly used in foundation pit support. The anchor rod has the advantages of low cost, good support effect, simple operation, flexible use, less occupation of construction clearance, etc. Therefore, it is widely used.

[0003] The existing anchoring device cannot adjust the length. The construction site is complex. Different anchoring depths need to be set according to the site conditions during anchoring. If different depths need to be anchored, a variety of lengths of anchor rods are needed, which increases the preparation workload before construction, increases the construction cost, reduces the practicality and applicability, and cannot adjust the direction of grouting. The grouting head of the anchor rod is generally arranged horizontally with the anchor rod. In the case of narrow construction environment, the grouting head of the anchor rod is difficult to connect with the grouting pipe, so a elbow needs to be installed on the grouting head to change the grouting direction, which increases the workload, reduces the applicability and flexibility, is inconvenient to use, and is inconvenient to assemble and disassemble the grouting pipe. The grouting pipe and the grouting head are generally connected through threads. During assembly and disassembly, tools need to be used for assembly and disassembly. The assembly and disassembly process is relatively cumbersome, which increases the workload and reduces the work efficiency. SUMMARY

[0004] In view of the above defects or improvement needs of the prior art, the present application provides an anchoring device and method for foundation pit support, wherein the anchoring device and method for foundation pit support are designed in combination with the characteristics of the anchor rod for foundation pit support and the grouting process characteristics thereof, and the structure and specific setting mode of the key components such as the adjustable anchor rod body module and the direction-adjustable grouting module are researched and designed. Through the design of the adjustable anchor rod body module, the length of the anchor rod and the grouting direction are flexibly adjusted to adapt to different engineering requirements and geological conditions.

[0005] To achieve the above object, according to one aspect of the present application, a foundation pit supporting anchor device is provided, comprising:

[0006] The adjustable anchor rod body module comprises a first rod body, a second rod body is sleeved on the inner wall of the first rod body in a sliding manner, a grouting hole is formed in the surface of the second rod body, a first fixing frame and a second fixing frame are fixedly sleeved on the inner walls of the first rod body and the second rod body respectively, a screw rod is rotatably sleeved on the inner wall of the first fixing frame, the surface of the screw rod is threadedly connected with the inner wall of the second fixing frame, and a driving mechanism for driving the screw rod to rotate is further arranged on the first rod body.

[0007] The direction-adjustable grouting module comprises a connecting pipe rotatably connected with the end of the first rod body, and the other end of the connecting pipe is provided with a grouting pipe.

[0008] In this way, the screw rod is driven to rotate according to the design requirements to adjust the extension length of the second rod body, and the direction of the grouting pipe is adaptively adjusted according to the requirements.

[0009] As a further preferred, the surface of the connecting pipe is rotatably sleeved with a fixing block, the fixing block is bolted with the surface of the first rod body, the surface of the connecting pipe is fixedly sleeved with a rotating disc, the rotating disc is rotatably sleeved with the inner wall of the fixing block, the inner wall of the fixing block is slidably sleeved with a first clamping rod, the surface of the first clamping rod is fixedly sleeved with a first limiting plate, a first spring is arranged between the first limiting plate and the inner wall of the fixing block, the surface of the rotating disc is provided with a clamping hole, and the clamping hole is clamped with the first clamping rod.

[0010] As a further preferred, one end of the connecting pipe is communicated with a connecting head, the inner wall of the connecting head is slidably sleeved with the grouting pipe, the surface of the connecting head is slidably sleeved with a sliding cylinder, the surface of the connecting head is fixedly sleeved with a limiting ring, a second spring is arranged between the limiting ring and the sliding cylinder, the inner wall of the sliding cylinder is provided with a triangular groove, the inner wall of the triangular groove is slidably connected with a second clamping rod, the surface of the second clamping rod is fixedly sleeved with a second limiting plate, a third spring is arranged between the second limiting plate and the inner wall of the connecting head, the surface of the grouting pipe is provided with a clamping groove, and the clamping groove is clamped with one end of the second clamping rod.

[0011] As a further preferred, the inner wall of the first rod body is fixedly sleeved with a third fixing frame, the surface of the third fixing frame is bolted with an extension rod, the other end of the extension rod is bolted with a pressing plate, a fourth spring is arranged between the pressing plate and the third fixing frame, and the fourth spring is sleeved on the surface of the extension rod.

[0012] As a further preferred, the surface of the second rod body is bolted with a sliding block, the surface of the sliding block is slidably connected with a sliding groove, and the sliding groove is formed in the inner wall of the first rod body.

[0013] As a further preferred, the surface of the first rod body is fixedly sleeved with a blocking plate, the surface of the blocking plate is fixedly sleeved with a blocking block, and the blocking block is fixedly sleeveled with the surface of the first rod body, and the shape of the blocking block is conical;

[0014] The surface of the first rod body is fixedly sleeved with an anti-coming-off block, and the shape of the anti-coming-off block is conical;

[0015] The surface of the second rod body is printed with scale lines.

[0016] As a further preferred, the inner wall of the first rod body is embedded with a sealing ring, and the sealing ring is located between the pressing plates.

[0017] As a further preferred, the driving mechanism comprises a first conical gear fixedly sleeved with one end of the screw rod, the surface of the first conical gear is engaged with a second conical gear, the shaft center of the second conical gear is fixedly sleeved with a rotating shaft, the rotating shaft is rotatably sleeved with the inner wall of the first rod body, the top of the rotating shaft is fixedly sleeved with a hexagonal rotating head, the surface of the first fixed frame is fixedly sleeved with a protective shell, and the rotating shaft is rotatably sleeved with the inner wall of the protective shell.

[0018] According to another aspect of the present application, a method for using the anchor device for foundation pit support is also provided, which comprises the following steps:

[0019] Step one, according to the design parameters, the extension length of the first rod body is adjusted, specifically, the driving mechanism is actuated to drive the screw rod to rotate, the screw rod is rotated to move the second fixed frame, the second fixed frame is moved to drive the second rod body to move, and the length of the anchor rod is adjusted to the preset length;

[0020] Step two, the first clamping rod is moved, the first clamping rod is moved to make the first clamping rod and the clamping hole disengaged, then the connecting pipe is rotated to the desired direction, the first clamping rod is loosened, the first clamping rod is clamped with the clamping hole under the action of the first spring, the rotating disc is fixed to adjust the direction of the connecting pipe to be consistent with the direction of grouting, and then grouting is performed;

[0021] Step three, when grouting, the pressure of the slurry makes the pressing plate and the inner wall of the first rod body disengage, the slurry enters the first rod body, and then is sprayed out from the grouting hole on the surface of the second rod body, grouting is performed, when grouting is completed, the pressure of the slurry disappears, and the pressing plate is pressed against the inner wall of the first rod body under the action of the fourth spring;

[0022] Step three, after grouting is completed, the sliding cylinder is moved, the sliding cylinder is moved to drive the triangular groove to move, the triangular groove is moved to make the second clamping rod disengaged from the clamping groove under the action of the third spring, then the grouting pipe is removed, and the disassembly is completed.

[0023] As further preferred, further comprising: during installation, inserting the grouting pipe into the connecting head, loosening the sliding cylinder, the sliding cylinder resets under the action of the second spring, the sliding cylinder resets to drive the triangular groove to reset, the triangular groove resets to make the clamping rod and the clamping groove clamped, the grouting pipe is fixed, and the installation is completed.

[0024] Overall, compared with the prior art, the above technical solutions conceived by the present application mainly have the following technical advantages:

[0025] 1. The present application rotates the hexagonal rotating head by using a wrench, the hexagonal rotating head rotates to drive the rotating shaft to rotate, the rotating shaft rotates to drive the second bevel gear to rotate, the second bevel gear rotates to drive the first bevel gear to rotate, the first bevel gear rotates to drive the screw rod to rotate, the screw rod rotates to move the second fixed frame, the second fixed frame moves to drive the second rod body to move, so that the length of the anchor rod changes, thereby achieving the purpose of adjusting the length of the anchor rod, improving practicality and applicability.

[0026] 2. The present application moves the first clamping rod, the first clamping rod moves to make the first clamping rod and the clamping hole disengaged, then rotates the connecting pipe to the required direction, loosens the first clamping rod, the first clamping rod is clamped with the clamping hole under the action of the first spring, and the connecting pipe is fixed, so that the direction of the connecting pipe is fixed, thereby achieving the purpose of adjusting the grouting direction, improving practicality and flexibility, and facilitating use.

[0027] 3. The present application moves the sliding cylinder, the sliding cylinder moves to drive the triangular groove to move, the triangular groove moves to make the second clamping rod disengaged from the clamping groove under the action of the third spring, then the grouting pipe is removed, the disassembly is completed, during installation, the grouting pipe is inserted into the connecting head, the sliding cylinder is loosened, the sliding cylinder resets under the action of the second spring, the sliding cylinder resets to drive the triangular groove to reset, the triangular groove resets to make the clamping rod and the clamping groove clamped, the grouting pipe is fixed, and the installation is completed, thereby achieving the purpose of facilitating assembly and disassembly, reducing the workload, and improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the anchor device for foundation pit support of the present application;

[0029] Figure 2 It is a sectional view of the anchor device for foundation pit support of the present application;

[0030] Figure 3 It is a lateral sectional view of the lateral partial structure of the anchor device for foundation pit support of the present application;

[0031] Figure 4 It is an enlarged schematic diagram of the partial structure at A in the present application; Figure 2

[0032] Figure 5 ​is the present application Figure 2 is a local structure enlarged view at B in the figure;

[0033] Figure 6 is the present application Figure 2 is a local structure enlarged view at C in the figure.

[0034] In all the drawings, the same reference signs refer to the same technical features, specifically: 1 - first rod body; 2 - second rod body; 3 - grouting hole; 4 - first fixing frame; 5 - second fixing frame; 6 - screw rod; 7 - first bevel gear; 8 - second bevel gear; 9 - rotating shaft; 10 - hexagonal rotating head; 11 - connecting pipe; 12 - fixing block; 13 - rotating disc; 14 - first clamping rod; 15 - first limiting plate; 16 - first spring; 17 - clamping hole; 18 - connecting head; 19 - grouting pipe; 20 - sliding cylinder; 21 - limiting ring; 22 - second spring; 23 - triangular groove; 24 - second clamping rod; 25 - second limiting plate; 26 - third spring; 27 - clamping groove; 28 - third fixing frame; 29 - telescopic rod; 30 - pressing plate; 31 - fourth spring; 32 - sliding block; 33 - sliding groove; 34 - blocking plate; 35 - blocking block; 36 - anti-disengagement block; 37 - scale line; 38 - sealing ring; 39 - anti-skid pattern; 40 - protective shell. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0036] As Figures 1 to 6 shown, the anchor device for foundation pit support provided by the embodiment of the present application comprises: an adjustable anchor rod body module, the adjustable anchor rod body module comprises a first rod body 1, a second rod body 2 is slidably sleeved on the inner wall of the first rod body 1, a grouting hole 3 is formed in the surface of the second rod body 2, a first fixing frame 4 and a second fixing frame 5 are fixedly sleeved on the inner walls of the first rod body 1 and the second rod body 2 respectively, a screw rod 6 is rotatably sleeved on the inner wall of the first fixing frame 4, and the surface of the screw rod 6 is threadedly connected with the inner wall of the second fixing frame 5, and a driving mechanism for driving the screw rod 6 to rotate is further arranged on the first rod body 1; a direction-adjustable grouting module, the direction-adjustable grouting module comprises a connecting pipe 11 rotatably connected with the end of the first rod body 1, and a grouting pipe 19 is arranged at the other end of the connecting pipe 11; in this way, the screw rod 6 is driven to rotate according to the design requirement to adjust the extension length of the second rod body 2, and the direction of the grouting pipe 19 is adaptively adjusted according to the requirement.

[0037] In one specific embodiment of the present application, an anchoring device for foundation pit support comprises a first rod body 1, characterized in that the inner wall of the first rod body 1 is slidably sleeved with a second rod body 2, the surface of the second rod body 2 is provided with a grouting hole 3, the inner walls of the first rod body 1 and the second rod body 2 are fixedly sleeved with a first fixing frame 4 and a second fixing frame 5 respectively, the inner wall of the first fixing frame 4 is rotatably sleeved with a screw rod 6, the surface of the screw rod 6 is threadedly connected with the inner wall of the second fixing frame 5, one end of the screw rod 6 is fixedly sleeved with a first bevel gear 7, the surface of the first bevel gear 7 is engaged with a second bevel gear 8, the shaft center of the second bevel gear 8 is fixedly sleeved with a rotating shaft 9, the rotating shaft 9 is rotatably sleeved with the inner wall of the first rod body 1, the top of the rotating shaft 9 is bolted with a hexagonal rotating head 10, the surface of the first fixing frame 4 is bolted with a protective shell 40, and the rotating shaft 9 is rotatably sleeved with the inner wall of the protective shell 40.

[0038] One end of the first rod body 1 is rotatably sleeved with a connecting pipe 11, the surface of the connecting pipe 11 is rotatably sleeved with a fixing block 12, the fixing block 12 is bolted with the surface of the first rod body 1, the surface of the connecting pipe 11 is fixedly sleeved with a rotating disc 13, the rotating disc 13 is rotatably sleeved with the inner wall of the fixing block 12, the inner wall of the fixing block 12 is slidably sleeved with a first clamping rod 14, the surface of the first clamping rod 14 is fixedly sleeved with a first limiting plate 15, a first spring 16 is arranged between the first limiting plate 15 and the inner wall of the fixing block 12, the surface of the rotating disc 13 is provided with a clamping hole 17, and the clamping hole 17 is clamped with the first clamping rod 14.

[0039] One end of the connecting pipe 11 is communicated with a connecting head 18, the inner wall of the connecting head 18 is slidably sleeved with a grouting pipe 19, the surface of the connecting head 18 is slidably sleeved with a sliding cylinder 20, the surface of the connecting head 18 is fixedly sleeved with a limiting ring 21, a second spring 22 is arranged between the limiting ring 21 and the sliding cylinder 20, the inner wall of the sliding cylinder 20 is provided with a triangular groove 23, the inner wall of the triangular groove 23 is slidably connected with a second clamping rod 24, the surface of the second clamping rod 24 is fixedly sleeved with a second limiting plate 25, a third spring 26 is arranged between the second limiting plate 25 and the inner wall of the connecting head 18, the surface of the grouting pipe 19 is provided with a clamping groove 27, and one end of the clamping groove 27 is clamped with the second clamping rod 24.

[0040] The inner wall of the first rod body 1 is fixedly sleeved with a third fixing frame 28, the surface of the third fixing frame 28 is bolted with a telescopic rod 29, the other end of the telescopic rod 29 is bolted with a pressing plate 30, a fourth spring 31 is arranged between the pressing plate 30 and the third fixing frame 28, and the fourth spring 31 is sleeved on the surface of the telescopic rod 29.

[0041] The surface of the second rod body 2 is bolted with a sliding block 32, the surface of the sliding block 32 is slidingly connected with a sliding groove 33, and the sliding groove 33 is arranged on the inner wall of the first rod body 1.

[0042] The surface of the first rod body 1 is fixedly sleeved with a blocking plate 34, the surface of the blocking plate 34 is bolted with a blocking block 35, and the blocking block 35 is fixedly sleeved with the surface of the first rod body 1, and the shape of the blocking block 35 is conical.

[0043] The surface of the first rod body 1 is fixedly sleeved with an anti-dropping block 36, and the shape of the anti-dropping block 36 is conical.

[0044] The surface of the second rod body 2 is printed with a scale line 37.

[0045] The inner wall of the first rod body 1 is embedded with a sealing ring 38, and the sealing ring 38 is located between the pressing plates 30.

[0046] The surface of the sliding cylinder 20 is provided with anti-skid lines 39.

[0047] In one preferred embodiment of the present application, a force sensor is further arranged at the grouting hole 3 for measuring the grouting pressure, a displacement sensor, an angle sensor and a force sensor are arranged on the screw rod 6 for monitoring the rotation angle of the screw rod 6, the displacement of the anchor rod body and the force condition in real time. In this embodiment, a microcontroller unit is further integrated, which adopts a high-performance microcontroller as the core of the system, processes the sensor data and controls the driving mechanism.

[0048] In one embodiment of the present application, the grouting hole adopts a multi-stage grouting hole arrangement mode to realize uniform distribution of the grouting pressure. Specifically, a plurality of rows of grouting holes are arranged on the inner wall of the second rod body at a certain interval, and each row of grouting holes corresponds to a pressure level. At the same time, according to the required flow and pressure, the diameter of each row of grouting holes is calculated. The larger the diameter, the greater the flow, but the structural strength needs to be considered.

[0049] In one embodiment of the present application, before anchoring, the screw rod pose needs to be optimized to adjust the pose of the overall anchoring device. Specifically, the screw rod pose directly affects the force condition and stability of the anchoring device. The optimal pose of the screw rod can be determined by an optimization algorithm:

[0050] θ opt =arg min θ (∑(F i -F desired ) 2 +λ(M i -M desired ) 2 )

[0051] Wherein, θ is the screw rod pose angle, F iF is the force at the current pose, F desired M is the desired force, M i M is the torque at the current pose, M desired M is the desired torque, λ is the weight coefficient, used to balance the optimization objectives of force and torque.

[0052] Furthermore, in one embodiment of the present invention, the size of the grouting hole affects the uniformity and efficiency of grouting. The optimal grouting hole diameter Dopt can be determined by the following optimization formula:

[0053]

[0054] Q is the grouting flow, P is the grouting pressure. In this way, the flow is maximized while maintaining a certain grouting pressure, thereby improving the efficiency of grouting.

[0055] The grouting pressure needs to be optimized according to the geological conditions, grouting depth and grouting hole size. The optimal grouting pressure Popt can be determined using the following formula: opt

[0056] (θ opt , D opt , P opt ) = arg min θ，D，P (f1(θ, P) + f2(D, P) + f3(θ, D))

[0057] f1(θ, P) is the optimization objective function of screw pose and grouting pressure, f2(D, P) is the optimization objective function of grouting hole size and grouting pressure, f3(θ, D) is the optimization objective function of screw pose and grouting hole size.

[0058] In the present application, genetic algorithm, particle swarm optimization algorithm or other multi-objective optimization algorithm can be used to solve. Through the above optimization calculation formula and measures, the stability and reliability of the anchoring device for foundation pit support can be ensured under the mutual influence of multiple factors. That is, through the design of the adjustable anchor rod body module, the present application realizes the flexible adjustment of the anchor rod length and the grouting direction, and adapts to different engineering requirements and geological conditions. The automatic control system realizes real-time monitoring and accurate control of the anchoring device through sensors and microcontrollers, improving the construction efficiency and safety. The intelligent grouting system ensures the uniformity and effectiveness of grouting by accurately controlling the grouting pressure and flow, improving the stability of the supporting structure. The introduction of the stress monitoring system enables real-time monitoring of the stress state of the anchoring device during construction, timely discovery and handling of potential structural problems. Through the optimization of the driving mechanism and the design of the self-adaptive direction adjustable grouting module, the construction operation process is simplified and the operation difficulty is reduced. The multifunctional design of the anchoring device makes it not only suitable for foundation pit support, but also can be extended to other engineering fields, such as ground anchors, tunnel support, etc. The design of the anchoring device for foundation pit support not only improves the flexibility and efficiency of construction, but also enhances the safety and reliability of the construction process through the application of intelligent and automated technology, while also considering environmental protection and sustainability, with wide application prospects and significant social benefits.

[0059] In use, the hexagonal rotating head 10 is rotated by a wrench, the hexagonal rotating head 10 drives the rotating shaft 9 to rotate, the rotating shaft 9 drives the second bevel gear 8 to rotate, the second bevel gear 8 drives the first bevel gear 7 to rotate, the first bevel gear 7 drives the screw rod 6 to rotate, the screw rod 6 drives the second fixed frame 5 to move, the second fixed frame 5 drives the second rod body 2 to move, so that the length of the anchor rod is changed, thereby achieving the purpose of adjusting the length of the anchor rod; the first clamping rod 14 is moved, the first clamping rod 14 is moved to be disengaged from the clamping hole 17, then the connecting pipe 11 is rotated to the required direction, the first clamping rod 14 is loosened, the first clamping rod 14 is clamped with the clamping hole 17 under the action of the first spring 16, the rotating disc 13 is fixed, thereby the direction of the connecting pipe 11 is fixed, thereby achieving the purpose of adjusting the grouting direction; the sliding cylinder 20 is moved, the sliding cylinder 20 drives the triangular groove 23 to move, the triangular groove 23 drives the second clamping rod 24 to be disengaged from the clamping groove 27 under the action of the third spring 26, then the grouting pipe 19 is removed, the disassembly is completed, in installation, the grouting pipe 19 is inserted into the connecting head 18, the sliding cylinder 20 is loosened, the sliding cylinder 20 is reset under the action of the second spring 22, the sliding cylinder 20 drives the triangular groove 23 to reset, the triangular groove 23 drives the clamping rod to be clamped with the clamping groove 27, the grouting pipe 19 is fixed, the installation is completed, thereby achieving the purpose of facilitating the installation and disassembly; in grouting, the pressure of the slurry makes the pressing plate 30 disengage from the inner wall of the first rod body 1, the slurry enters the first rod body 1, then is sprayed from the grouting hole 3 on the surface of the second rod body 2, grouting is carried out, when the grouting is completed, the pressure of the slurry disappears, the pressing plate 30 is pressed against the inner wall of the first rod body under the action of the fourth spring 31, so that the slurry is prevented from flowing out, the grouting pressure is ensured, and the grouting quality is improved.

[0060] Those skilled in the art will easily understand that the above description is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anchoring device for a foundation pit support, characterized by, The utility model relates to a direction adjustable grouting module and an adjustable anchor rod body module, and belongs to the field of grouting technology. The adjustable anchor rod body module comprises a first rod body (1), a second rod body (2) is sleeved on the inner wall of the first rod body (1) in a sliding mode, a grouting hole (3) is formed in the surface of the second rod body (2), a first fixing frame (4) and a second fixing frame (5) are fixedly sleeved on the inner walls of the first rod body (1) and the second rod body (2) respectively, a screw rod (6) is rotatably sleeved on the inner wall of the first fixing frame (4), and the surface of the screw rod (6) is threadedly connected with the inner wall of the second fixing frame (5), and a driving mechanism for driving the screw rod (6) to rotate is further arranged on the first rod body (1). The direction adjustable grouting module comprises a connecting pipe (11) rotatably connected with the end of the first rod body (1), and the other end of the connecting pipe (11) is provided with a grouting pipe (19). In this way, the screw rod (6) is driven to rotate according to the design requirement to adjust the extension length of the second rod body (2), and the direction of the grouting pipe (19) is adaptively adjusted according to the requirement, the surface of the connecting pipe (11) is rotatably sleeved with a fixing block (12), the fixing block (12) is bolted with the surface of the first rod body (1), the surface of the connecting pipe (11) is fixedly sleeved with a rotating disc (13), the rotating disc (13) is rotatably sleeved with the inner wall of the fixing block (12), the inner wall of the fixing block (12) is slidably sleeved with a first clamping rod (14), the surface of the first clamping rod (14) is fixedly sleeved with a first limiting plate (15), a first spring (16) is arranged between the first limiting plate (15) and the inner wall of the fixing block (12), the surface of the rotating disc (13) is provided with a clamping hole (17), and the clamping hole (17) is clamped with the first clamping rod (14), one end of the connecting pipe (11) is communicated with a connecting head (18), the inner wall of the connecting head (18) is slidably sleeved with the grouting pipe (19), the surface of the connecting head (18) is slidably sleeved with a sliding cylinder (20), the surface of the connecting head (18) is fixedly sleeved with a limiting ring (21), a second spring (22) is arranged between the limiting ring (21) and the sliding cylinder (20), the inner wall of the sliding cylinder (20) is provided with a triangular groove (23), the inner wall of the triangular groove (23) is slidably connected with a second clamping rod (24), the surface of the second clamping rod (24) is fixedly sleeved with a second limiting plate (25), a third spring (26) is arranged between the second limiting plate (25) and the inner wall of the connecting head (18), and the surface of the grouting pipe (19) is provided with a clamping groove (27), and one end of the clamping groove (27) is clamped with the second clamping rod (24).

2. The anchoring device for foundation pit support according to claim 1, characterized in that, The inner wall of the first rod body (1) is fixedly sleeved with a third fixing frame (28), the surface of the third fixing frame (28) is bolted with a telescopic rod (29), the other end of the telescopic rod (29) is bolted with a pressing plate (30), a fourth spring (31) is arranged between the pressing plate (30) and the third fixing frame (28), and the fourth spring (31) is sleeved on the surface of the telescopic rod (29).

3. The anchoring device for foundation pit support according to claim 2, characterized in that, The surface of the second rod body (2) is bolted with a sliding block (32), the surface of the sliding block (32) is slidingly connected with a sliding groove (33), and the sliding groove (33) is arranged on the inner wall of the first rod body (1).

4. The anchoring device for foundation pit support according to claim 3, characterized in that, The surface of the first rod body (1) is fixedly sleeved with a blocking plate (34), the surface of the blocking plate (34) is bolted with a blocking block (35), and the blocking block (35) is fixedly sleeved with the surface of the first rod body (1), and the shape of the blocking block (35) is conical. The surface of the first rod body (1) is fixedly sleeved with an anti-dropping block (36), and the shape of the anti-dropping block (36) is conical. The surface of the second rod body (2) is printed with a scale line (37).

5. The anchoring device for foundation pit support according to claim 4, characterized in that, The inner wall of the first rod body (1) is embedded with a sealing ring (38), and the sealing ring (38) is located between the pressing plates (30).

6. An anchoring device for a foundation pit support according to any one of claims 2-5, characterized in that, The driving mechanism comprises a first bevel gear (7) fixedly sleeved with one end of the screw rod (6), the surface of the first bevel gear (7) is engaged with a second bevel gear (8), the shaft center of the second bevel gear (8) is fixedly sleeved with a rotating shaft (9), the rotating shaft (9) is rotatably sleeved with the inner wall of the first rod body (1), the top of the rotating shaft (9) is bolted with a hexagonal rotating head (10), the surface of the first fixed frame (4) is bolted with a protective shell (40), and the rotating shaft (9) is rotatably sleeved with the inner wall of the protective shell (40).

7. A method of using an anchoring device for a foundation pit support according to any one of claims 2-6, characterized in that, The steps include: Step one, according to the design parameters, adjust the length of the first rod body (1), specifically, the driving mechanism is actuated to drive the screw rod (6) to rotate, the rotation of the screw rod (6) drives the second fixed frame (5) to move, the movement of the second fixed frame (5) drives the second rod body (2) to move, so that the length of the anchor rod is adjusted to the preset length; Step two, move the first clamping rod (14), the first clamping rod (14) is moved to make the first clamping rod (14) and the clamping hole (17) disengaged, then rotate the connecting pipe (11) to the direction needed, loosen the first clamping rod (14), the first clamping rod (14) is clamped with the clamping hole (17) under the action of the first spring (16), the rotating disc (13) is fixed, so that the direction of the connecting pipe (11) is adjusted to be consistent with the direction of grouting, and then grouting is carried out; Step three, when grouting, the pressure of the slurry makes the pressing plate (30) and the inner wall of the first rod body (1) disengage, the slurry enters the first rod body (1), and then is sprayed out from the grouting hole (3) on the surface of the second rod body (2), grouting is carried out, when grouting is completed, the pressure of the slurry disappears, the pressing plate (30) is pressed against the inner wall of the first rod body under the action of the fourth spring (31); Step three, after grouting is completed, move the sliding cylinder (20), the sliding cylinder (20) drives the triangular groove (23) to move, the triangular groove (23) moves to make the second clamping rod (24) disengage from the clamping groove (27) under the action of the third spring (26), then the grouting pipe (19) is removed, and the disassembly is completed.

8. The method of use of claim 7, wherein, Also include: install, insert the grouting pipe (19) into the connector (18), loosen the slide cylinder (20), the slide cylinder (20) resets under the action of the second spring (22), the slide cylinder (20) resets drives the triangular groove (23) resets, the triangular groove (23) resets makes the clamping rod and the clamping groove (27) clamps, fixes the grouting pipe (19), completes the installation.

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