Anchoring and spraying supporting device in foundation pit construction

Abstract

The application provides an anchor-spraying supporting device in foundation pit construction, and relates to the technical field of supporting structures. The anchor-spraying supporting device comprises a protection pipe, a first torsion disc, a second torsion disc and a plurality of anchor cables. The protection pipe is fixed in an anchor hole. The first torsion disc and / or the second torsion disc are arranged in the protection pipe. The first torsion disc or the second torsion disc rotates relative to the protection pipe when a torsion force exceeding a preset size is applied. The anchor cables are arranged through the first torsion disc and the second torsion disc. The anchor cables comprise a torsion section between the first torsion disc and the second torsion disc. In an initial state, the torsion section is arranged obliquely to the axis of the protection pipe. The first torsion disc and / or the second torsion disc are arranged to rotate relative to the protection pipe. The torsion section in the anchor cables can be twisted by a certain angle. In a deteriorated working condition such as geological structure creep, the torsion of the torsion section can release part of the anchor cable tension, thereby achieving a pressure relief effect and avoiding anchor cable failure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of supporting structure, in particular to an anchor-spray supporting device in foundation pit construction. BACKGROUND

[0002] Prestressed concrete structures have been widely used in large public buildings, high-rise and super high-rise buildings, long-span bridges and multi-story industrial plants and other modern engineering. After more than 50 years of exploration and effort, China has formed a unique system in the design theory, calculation method, component series, structure system, tensioning and anchoring system, prestressing process, prestressed reinforcement and concrete materials of prestressed concrete; in the construction technology and construction management of prestressed concrete, it has accumulated rich experience and achieved good economic and social benefits; composite soil nailing support is a supporting means developed on the basis of soil nailing support for foundation pit or slope support to improve the stability of the slope.

[0003] The Chinese patent CN113445513B provides a soil nailing anchor structure, which combines traditional soil nailing and anchor structure to form a supporting structure with rigidity and flexibility, which can well combine the supporting structure with the original soil during slope support, support the slope, effectively prevent slope landslide or collapse, and effectively prevent slope instability caused by natural disasters such as earthquakes through multi-stage pressure relief of the anchor. However, the pressure relief is mainly for stress mutation scenarios such as earthquakes, slope landslides and collapses, and cannot effectively relieve pressure for geological structure creep, thereby causing anchor failure and threatening the stability and safety of the slope.

[0004] The information disclosed in the background section of this application is only intended to deepen the understanding of the general background of the application, and should not be considered as acknowledging or implying in any form that this information constitutes prior art known to those skilled in the art. SUMMARY

[0005] Therefore, it is necessary to provide an anchor-spray supporting device in foundation pit construction to solve the problems of poor stability and safety of the existing supporting structure.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] The application discloses an anchor and spray supporting device in foundation pit construction, which comprises a protection pipe, a first torsion disc, a second torsion disc and a plurality of anchor cables, the protection pipe is fixed in an anchor hole, the first torsion disc and / or the second torsion disc are arranged in the protection pipe, the first torsion disc or the second torsion disc is relatively rotated with the protection pipe when a torsion force exceeding a preset size is applied, an auxiliary torsion disc is arranged at the bottom and / or the top of the protection pipe, the auxiliary torsion disc can be rotated relative to the protection pipe, one end of the anchor cable is fixedly connected to the auxiliary torsion disc or the protection pipe near the bottom of the anchor hole, the other end of the anchor cable is fixedly connected to the auxiliary torsion disc or the protection pipe near the top of the anchor hole, the anchor cable passes through the first torsion disc and the second torsion disc, the anchor cable comprises a torsion section between the first torsion disc and the second torsion disc, and the torsion section is arranged to be inclined to the axis of the protection pipe in an initial state.

[0008] In one of the embodiments, a wedge-shaped friction disc is arranged on each of the first torsion disc and the second torsion disc, the two wedge-shaped friction discs abut against each other, the friction between the two wedge-shaped friction discs limits the relative rotation of the first torsion disc and the second torsion disc, the distance between the first torsion disc and the second torsion disc is adjustable, the friction between the two wedge-shaped friction discs is negatively correlated with the distance between the first torsion disc and the second torsion disc.

[0009] In one of the embodiments, an adjusting boss is arranged on the outer periphery of the protection pipe, a threaded hole is arranged on the adjusting boss, an adjusting bolt is arranged in the threaded hole, and the adjusting bolt is used to adjust the distance between the first torsion disc and the second torsion disc.

[0010] In one of the embodiments, an adjusting wheel is arranged on the protection pipe, the inner peripheral wall surface of the adjusting wheel abuts against the outer peripheral wall surface of the adjusting bolt, and the adjusting wheel is rotated to drive the adjusting bolt to rotate.

[0011] In one of the embodiments, a one-way bearing is arranged on the first torsion disc or the second torsion disc, the wedge-shaped friction disc is rotatably connected to the first torsion disc or the second torsion disc through the one-way bearing, and the one-way bearing limits the relative rotation of the first torsion disc and the second torsion disc to increase the inclination angle of the torsion section.

[0012] In one of the embodiments, an elastic member and a damping structure are arranged between the first torsion disc and the second torsion disc, the damping structure makes the elastic member store energy when the rotating speed between the first torsion disc and the second torsion disc exceeds a preset value, the elastic force of the elastic member always makes the torsion section be inclined to the axis of the protection pipe or has a tendency to make the torsion section be inclined to the axis of the protection pipe.

[0013] In one of the embodiments, the damping structure is arranged on the first torsion disc or the second torsion disc, the damping structure comprises an annular chamber, a sliding plate and a fixed plate, the annular chamber is arranged in the first torsion disc or the second torsion disc, the annular chamber is filled with a flowing medium and is sealed from the outside; the fixed plate is arranged in the annular chamber, the fixed plate hinders the flow of the flowing medium; the sliding plate is slidably arranged in the annular chamber, the sliding plate is provided with a damping hole for the flowing medium to flow through; and one end of the sliding plate is fixedly connected with the elastic piece.

[0014] In one of the embodiments, the locking assembly is fixedly connected with the pipe near the bottom of the anchor hole.

[0015] In one of the embodiments, the locking assembly comprises an anchor head, a sliding rod, a clamping jaw and a supporting rod, the anchor head is fixedly connected with the pipe, the sliding rod is axially slidable relative to the anchor head along the pipe, one end of the clamping jaw is rotatably connected with one end of the sliding rod, the other end of the clamping jaw is rotatably connected with one end of the supporting rod, and the other end of the supporting rod is rotatably connected with the anchor head.

[0016] In one of the embodiments, the tail plate is arranged on the pipe near the top of the anchor hole.

[0017] The beneficial effects of the present application are as follows:

[0018] The anchor and shotcrete support device for foundation pit construction provided by the present application comprises a pipe, a first torsion disc, a second torsion disc and a plurality of anchor cables, the pipe is fixed in an anchor hole, the first torsion disc and / or the second torsion disc is arranged in the pipe, the first torsion disc or the second torsion disc is relatively rotatable with the pipe when a torsion force exceeding a preset size is applied; the anchor cables are arranged through the first torsion disc and the second torsion disc, the anchor cables comprise a torsion segment located between the first torsion disc and the second torsion disc, and the torsion segment is initially arranged obliquely to the axis of the pipe. By arranging the first torsion disc and / or the second torsion disc which is relatively rotatable with the pipe, the torsion segment in the anchor cables can be twisted by a certain angle, and in the case of deterioration of the geological structure such as creep, the torsion of the torsion segment can release part of the tension of the anchor cables, thereby achieving a pressure relief effect and avoiding failure of the anchor cables. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structural schematic view of the anchor and shotcrete support device for foundation pit construction provided by one embodiment of the present application is shown in the figure;

[0020] Figure 2 The sectional view of the anchor and shotcrete support device for foundation pit construction provided by one embodiment of the present application is shown in the figure;

[0021] Figure 3 The structural schematic view of the locking assembly in the anchor-shot supporting device in the foundation pit construction is provided for an embodiment of the present application, and the locking assembly is in the contracted state in the figure;

[0022] Figure 4 The structural schematic view of the locking assembly in the anchor-shot supporting device in the foundation pit construction is provided for an embodiment of the present application, and the locking assembly is in the contracted state in the figure;

[0023] Figure 5 The structural schematic view of the second torsion disc in the anchor-shot supporting device in the foundation pit construction is provided for an embodiment of the present application;

[0024] Figure 6 The structural schematic view of the anchor-shot supporting device in the foundation pit construction is provided for an embodiment of the present application;

[0025] Figure 7 The structural schematic view of the elastic member in the anchor-shot supporting device in the foundation pit construction is provided for an embodiment of the present application.

[0026] Wherein:

[0027] 100, the protection tube; 110, the adjusting bolt; 120, the adjusting wheel; 210, the first torsion disc; 220, the second torsion disc; 230, the auxiliary torsion disc; 240, the wedge-shaped friction disc; 241, the one-way bearing; 242, the elastic member; 243, the annular cavity; 244, the sliding plate; 300, the locking assembly; 310, the anchor head; 320, the sliding rod; 330, the clamping jaw; 340, the supporting rod; 400, the tail plate; 900, the anchor cable. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application clearer and more comprehensible, the present application is further described in detail below by embodiments, and in combination with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0029] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. Unless otherwise specified, the "connection" and "coupling" in this application include direct and indirect connection (coupling). In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0031] The anchor and spray supporting device in the foundation pit construction provided by the embodiment of the present application is mainly used in various scenes requiring supporting, and is particularly suitable for slope supporting in the foundation pit construction.

[0032] Specifically, as shown in Figure 1 , Figure 2 and Figure 5 , the anchor and spray supporting device in the foundation pit construction provided by the embodiment of the present application comprises a protection pipe 100, a first torsion disc 210, a second torsion disc 220 and a plurality of anchor cables 900. The protection pipe 100 is located at the periphery of the entire supporting device, and the protection pipe 100 surrounds most of the remaining components. In general, the protection pipe 100 is placed after the anchor hole is drilled in advance, one end of the protection pipe 100 is fixedly connected to a position where the geological conditions of the bottom of the anchor hole are relatively stable, and the other end of the protection pipe 100 is fixedly connected to the top of the anchor hole. The first torsion disc 210 and the second torsion disc 220 are arranged in the protection pipe 100, and the first torsion disc 210 and the second torsion disc 220 are arranged close to each other. The first torsion disc 210 and the second torsion disc 220 cannot move axially relative to the protection pipe 100; when the torsion force acting on the first torsion disc 210 or the second torsion disc 220 exceeds a preset value, the first torsion disc 210 and / or the second torsion disc 220 can rotate relative to the protection pipe 100; when the torsion force acting on the first torsion disc 210 and / or the second torsion disc 220 does not exceed the preset value, the first torsion disc 210 and / or the second torsion disc 220 remain relatively stationary relative to the protection pipe 100. The first torsion disc 210 and the second torsion disc 220 are both provided with through holes for the anchor cables 900 to pass through, the anchor cables 900 pass through the first torsion disc 210 and the second torsion disc 220 in sequence, and the two ends of the anchor cables 900 are fixedly connected to the bottom of the anchor hole and the top of the anchor hole respectively. The anchor cables 900 include a torsion section between the first torsion disc 210 and the second torsion disc 220, and straight sections at other positions.

[0033] In the initial state, the anchor cable 900 is taut, the twisted segment is inclined to the axis of the pipe 100, and the straight segment is parallel to the axis of the pipe 100. When the supporting device is subjected to increased stress due to geological structure creep and the like of the slope, the anchor cable 900 is subjected to increased tension, which tends to drive the twisted segment to change to a state parallel to the axis of the pipe 100, and the anchor cable 900 has a tendency to drive the first twisted disc 210 or the second twisted disc 220 to rotate; if the twisting force of the anchor cable 900 driving the first twisted disc 210 or the second twisted disc 220 exceeds the preset size, the first twisted disc 210 or the second twisted disc 220 rotates, and the twisted segment changes from being inclined to being straight. In this process, since the distance between the first twisted disc 210 and the second twisted disc 220 remains unchanged, that is, the length of the twisted segment along the axis direction of the pipe 100 remains unchanged, the twisted segment changes from being inclined to being straight, so that the twisted segment is relatively relaxed to cope with the deterioration conditions such as geological structure creep. If the twisted segment cannot rotate, since the anchor cable 900 is already in a taut state in the initial state, when it faces deterioration conditions such as geological structure creep, the anchor cable 900 is subjected to increased tension and cannot yield, and when the tension continues to exceed the preset value or exceeds the limit value, the anchor cable 900 will be irreversibly damaged, broken, and the like.

[0034] In addition, when the first twisted disc 210 or the second twisted disc 220 rotates, in order to ensure that the straight segment is always parallel to the axis of the pipe 100, an auxiliary twisted disc 230 is arranged at one segment or both ends of the pipe 100, one end or both ends of the anchor cable 900 are fixedly connected to the auxiliary twisted disc 230, the auxiliary twisted disc 230 can freely rotate around the axis of the pipe 100 relative to the pipe 100, and the auxiliary twisted disc 230 cannot move relative to the pipe 100 in the axial direction of the pipe 100. When the first twisted disc 210 or the second twisted disc 220 rotates, since the auxiliary twisted disc 230 freely rotates, the straight segment drives the auxiliary twisted disc 230 to rotate until the straight segment is parallel to the axis of the pipe 100 again. It can be understood that one or both of the first twisted disc 210 and the second twisted disc 220 can rotate relative to the pipe 100, and accordingly, the number of auxiliary twisted discs 230 can be one or two; for the supporting device provided with one auxiliary twisted disc 230, the auxiliary twisted disc 230 should be arranged close to the rotatable one of the first twisted disc 210 and the second twisted disc 220, and for the side not provided with the auxiliary twisted disc 230, the anchor cable 900 is directly fixedly connected to the pipe 100 close to the bottom or top of the anchor hole.

[0035] Thus, the anchor shot supporting device in the foundation pit construction provided by the embodiment can make the torsion section in the anchor cable 900 twist by a certain angle, and the torsion of the torsion section can release part of the tension of the anchor cable 900, so as to play a pressure relief effect and avoid the failure of the anchor cable 900 in the case of the deterioration of the geological structure such as creep.

[0036] In one of the embodiments, as shown in Figure 2 and Figure 5 , the difference in the actual construction environment and the difference in the geological structure can cause the difference in the tension of the anchor cable 900, and further affect the limit value of the pressure relief of the anchor cable 900. Based on this, the wedge-shaped friction disc 240 is arranged on the first torsion disc 210 and the second torsion disc 220, the two wedge-shaped friction discs 240 abut, the friction between the two wedge-shaped friction discs 240 limits the relative rotation of the first torsion disc 210 and the second torsion disc 220, the distance between the first torsion disc 210 and the second torsion disc 220 is adjustable, the friction between the two wedge-shaped friction discs 240 and the distance between the first torsion disc 210 and the second torsion disc 220 are in a negative correlation. The torsion force of the relative rotation of the first torsion disc 210 and the second torsion disc 220 is at least greater than the friction between the two wedge-shaped friction discs 240, when the torsion force of the relative rotation of the first torsion disc 210 and the second torsion disc 220 needs to be increased, the two wedge-shaped friction discs 240 are made to approach each other along the axis of the protection pipe 100; when the torsion force of the relative rotation of the first torsion disc 210 and the second torsion disc 220 needs to be reduced, the two wedge-shaped friction discs 240 are made to move away from each other along the axis of the protection pipe 100.

[0037] In one of the embodiments, as shown in Figure 2 , Figure 5 and Figure 6 , the adjusting boss is arranged on the outer periphery of the protection pipe 100, the adjusting boss is provided with a threaded hole, the adjusting screw 110 is arranged in the threaded hole, and the adjusting screw 110 is used to adjust the distance between the first torsion disc 210 and the second torsion disc 220. When the adjusting screw 110 rotates, the adjusting screw 110 moves axially along the threaded hole, the adjusting screw 110 pushes the wedge-shaped friction disc 240 at one end, and further drives the wedge-shaped friction disc 240 to move.

[0038] In one of the embodiments, as shown in Figure 1 and Figure 6 , the adjusting wheel 120 is arranged on the protection pipe 100, the inner peripheral wall surface of the adjusting wheel 120 abuts against the outer peripheral wall surface of the adjusting screw 110, and the adjusting wheel 120 drives the adjusting screw 110 to rotate by rotating.

[0039] In one of the embodiments, the applicant finds that in some extreme working conditions, the tension of the anchor cable 900 will be temporarily and sharply increased, such as in an earthquake. If only a yielding structure is provided, the yielding structure can better enable the supporting device to maintain effectiveness when the earthquake occurs, but after the earthquake, the address condition is relatively improved, but the supporting device still exists yielding, and cannot meet the use requirements. Therefore, as shown in Figure 2 and Figure 5 , a one-way bearing 241 is provided on the first torsion disc 210 or the second torsion disc 220, and the wedge-shaped friction disc 240 is rotatably connected to the first torsion disc 210 or the second torsion disc 220 through the one-way bearing 241. The one-way bearing 241 limits the relative rotation of the first torsion disc 210 and the second torsion disc 220 to increase the inclination angle of the torsion segment. An elastic member 242 and a damping structure are provided between the first torsion disc 210 and the second torsion disc 220. The damping structure enables the elastic member 242 to store energy when the rotation speed between the first torsion disc 210 and the second torsion disc 220 exceeds a preset value. The elastic force of the elastic member 242 always makes the torsion segment inclined to the axis of the protective pipe 100 or has a tendency to make the torsion segment inclined to the axis of the protective pipe 100.

[0040] When the earthquake occurs, the tension of the anchor cable 900 is sharply increased. At this time, on the one hand, the first torsion disc 210 and the second torsion disc 220 are relatively positively rotated to yield, and on the other hand, the damping structure enables the elastic member 242 to store energy. After the earthquake, due to the provision of the one-way bearing 241, the friction between the wedge-shaped friction discs 240 does not hinder the relative reverse rotation of the first torsion disc 210 and the second torsion disc 220. At this time, the elastic force of the elastic member 242 is released, driving the first torsion disc 210 and the second torsion disc 220 to relatively reversely rotate. Moreover, since the damping structure is mainly affected by the change rate, in ordinary working conditions, the damping structure does not work. At this time, the elastic member 242 does not store energy, and does not have any effect on the rotation of the first torsion disc 210 and the second torsion disc 220.

[0041] In one of the embodiments, as shown in Figure 2 , Figure 5 and Figure 7 , the damping structure is provided on the first torsion disc 210 or the second torsion disc 220. The damping structure includes an annular chamber 243, a sliding plate 244 and a fixed plate. The annular chamber 243 is provided on the first torsion disc 210 or the second torsion disc 220, and the annular chamber 243 is filled with a flow medium and is relatively sealed with the outside. The fixed plate is provided in the annular chamber 243, and the fixed plate hinders the flow of the flow medium. The sliding plate 244 is slidably provided in the annular chamber 243, and the sliding plate 244 is provided with a damping hole for the flow of the flow medium. The sliding plate 244 is fixedly connected with one end of the elastic member 242.

[0042] In one of the embodiments, as shown in Figures 2-4 The locking assembly 300 is fixedly connected to the bottom of the anchor hole.

[0043] In one of the embodiments, as shown in Figures 2-4 The locking assembly 300 includes an anchor head 310, a sliding rod 320, a clamping jaw 330 and a supporting rod 340. The anchor head 310 is fixedly connected to the protection pipe 100. The sliding rod 320 is axially slidable relative to the anchor head 310 along the protection pipe 100. One end of the clamping jaw 330 is rotatably connected to one end of the sliding rod 320. The other end of the clamping jaw 330 is rotatably connected to one end of the supporting rod 340. The other end of the supporting rod 340 is rotatably connected to the anchor head 310.

[0044] In one of the embodiments, as shown in Figure 1 The tail plate 400 is usually fixed on the top of the anchor hole or the slope protection.

[0045] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist in contradiction, they shall be considered as the scope of the present application.

[0046] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, however, it shall not be understood as the limitation on the scope of the present application. It should be noted that, for the ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be considered as the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A device for supporting a foundation pit construction, characterized by, The application relates to a pipe protection device, which comprises a pipe, a first torsion disc, a second torsion disc and a plurality of anchor ropes, the anchor ropes are arranged in the first torsion disc and the second torsion disc, the pipe is fixed in an anchor hole, the first torsion disc and the second torsion disc are arranged in the pipe, the first torsion disc and the second torsion disc are relatively rotated with the pipe when a torsion force exceeding a preset size is applied; an auxiliary torsion disc is arranged at the bottom and / or top of the pipe, the auxiliary torsion disc can be rotated relative to the pipe, one end of the anchor rope is fixedly connected to the auxiliary torsion disc or the pipe near the bottom of the anchor hole, the other end of the anchor rope is fixedly connected to the auxiliary torsion disc or the pipe near the top of the anchor hole; the anchor rope comprises a torsion section between the first torsion disc and the second torsion disc, and the torsion section is arranged to be inclined to the pipe axis in an initial state. The first torsion disc and the second torsion disc are provided with wedge-shaped friction discs, the two wedge-shaped friction discs abut against each other, the friction force between the two wedge-shaped friction discs limits the relative rotation of the first torsion disc and the second torsion disc, the distance between the first torsion disc and the second torsion disc is adjustable, the friction force between the two wedge-shaped friction discs and the distance between the first torsion disc and the second torsion disc are in a negative correlation. The first torsion disc or the second torsion disc is provided with a one-way bearing, the wedge-shaped friction disc is rotatably connected to the first torsion disc or the second torsion disc through the one-way bearing, and the one-way bearing limits the relative rotation of the first torsion disc and the second torsion disc to make the inclination angle of the torsion section increase. The first torsion disc and the second torsion disc are provided with an elastic member and a damping structure, the damping structure makes the elastic member store energy when the rotating speed between the first torsion disc and the second torsion disc exceeds a preset value, and the elastic force of the elastic member always makes the torsion section be inclined to the pipe axis or has a tendency to make the torsion section be inclined to the pipe axis.

2. The anchor shot supporting device in foundation construction according to claim 1, wherein, An adjusting boss is arranged on the outer periphery of the pipe, the adjusting boss is provided with a threaded hole, an adjusting bolt is arranged in the threaded hole, and the adjusting bolt is used to adjust the distance between the first torsion disc and the second torsion disc.

3. The anchor shot device in foundation construction according to claim 2, wherein, An adjusting wheel is arranged on the pipe, the inner peripheral wall surface of the adjusting wheel abuts against the outer peripheral wall surface of the adjusting bolt, and the adjusting wheel drives the adjusting bolt to rotate by rotating.

4. The anchor shot device in foundation construction according to claim 1, wherein, The damping structure is arranged on the first torsion disc or the second torsion disc, the damping structure comprises an annular cavity, a sliding plate and a fixed plate, the annular cavity is arranged on the first torsion disc or the second torsion disc, the annular cavity is filled with a flow medium and is relatively sealed with the outside; the fixed plate is arranged in the annular cavity and hinders the flow of the flow medium; the sliding plate is slidably arranged in the annular cavity, the sliding plate is provided with a damping hole for the flow of the flow medium, and one end of the elastic member is fixedly connected to the sliding plate.

5. The anchor shot device in foundation construction according to any one of claims 1-4, characterized in that, The locking assembly is fixedly connected to the bottom of the anchor hole.

6. The anchor shot device in foundation construction according to claim 5, wherein, The locking assembly comprises an anchor head, a slide rod, a clamping jaw and a support rod, the anchor head is fixedly connected to the protective pipe, the slide rod is axially slidable relative to the anchor head along the protective pipe, one end of the clamping jaw is rotatably connected to one end of the slide rod, the other end of the clamping jaw is rotatably connected to one end of the support rod, and the other end of the support rod is rotatably connected to the anchor head.

7. The anchor shot device in foundation construction according to any one of claims 1-4, characterized in that, The protective pipe is provided with a tail plate at one end close to the top of the anchor hole.

Images