A foundation pit support device

Abstract

The utility model relates to a foundation pit support device, including a slope guard plate for buckling on the outside of the foundation pit slope, a plurality of guard plate through holes are provided on the slope guard plate, the foundation pit support device also includes a slope anchor rod corresponding to the number of the guard plate through holes and used to be inserted into the foundation pit slope, the foundation pit support device also includes an anchor rod support seat connected to the outside of the guard plate through holes by bolts, an anchor rod ball groove is provided on the anchor rod support seat, an anchor rod ball head is rotatably mounted in the anchor rod ball groove, and an anchor rod through hole is provided on the anchor rod ball head, the foundation pit support device also includes an anchor pad plate for sleeve connection to the outer periphery of the upper end of the anchor rod, a cone anchor groove is provided on the anchor pad plate, at least two anchor clips arranged along the circumference of the anchor rod are provided between the cone anchor groove and the anchor rod, and the lower end of the anchor pad plate is fixedly connected to the ball head. The utility model solves the technical problem in the prior art that when the anchor rod is not perpendicular to the slope guard plate, the anchor clip on one side is unevenly stressed and easily collapses, resulting in anchor failure.

Description

Technical Field

[0001] The utility model relates to supporting facilities in the field of civil construction, in particular to a foundation pit supporting device. Background Art

[0002] During construction, it is necessary to first dig a foundation pit, and then support the foundation pit slope through the foundation pit support device to ensure the stability of the foundation pit slope.

[0003] The use of existing foundation pit support devices is as follows: Figure 1 As shown, it includes a slope guard plate 2 pressed on the outside of the foundation pit slope 1, and the slope guard plate 2 is provided with a guard plate through hole 6. The foundation pit support device also includes a slope anchor rod 3 and an anchor pad 5 arranged between the slope anchor rod and the slope guard plate. When in use, the slope guard plate is pressed on the foundation pit slope, and then the anchor rod hole is drilled on the foundation pit slope through the guard plate through the through hole, and the slope anchor rod is placed in the anchor rod hole. An anchor pad is arranged between the slope anchor rod and the slope guard plate, and the anchor pad is connected to the anchor rod through three anchor clips 4. Using the tension of the slope anchor rod, the slope anchor rod firmly presses the slope guard plate on the foundation pit slope through the anchor pad, and the slope guard plate is used to ensure the stability of the foundation pit slope.

[0004] The problem with the existing foundation pit supporting device is that theoretically, the slope anchor rod, anchor pad and slope guard plate can be best stressed when the slope anchor rod is perpendicular to the slope guard plate. Therefore, when drilling with a drilling rig, the axis of the drill hole should also be perpendicular to the slope guard plate. However, due to the influence of drilling accuracy or slope anchor rod installation accuracy, the slope anchor rod and the slope guard plate are not in a standard vertical relationship, and there will be an error of 5° up and down. For example, the angle between the slope anchor rod and the slope guard plate is 85°~95°. When the slope anchor rod is not perpendicular to the slope guard plate, the anchor clip between the slope anchor rod and the anchor pad will be unevenly stressed, and the anchor clip on the side with greater stress is prone to collapse, that is, the anchor clip collapses from the tapered hole on the anchor pad, resulting in anchor failure. Utility Model Content

[0005] The utility model aims to provide a foundation pit supporting device to solve the technical problem in the prior art that when the anchor rod is not perpendicular to the slope guard plate, the single-side anchor clip is unevenly stressed and easily collapses, resulting in anchor failure.

[0006] In order to solve the above technical problems, a technical solution of a foundation pit supporting device in the utility model is as follows:

[0007] A foundation pit support device comprises a slope guard plate for buckling on the outer side of a foundation pit slope, the slope guard plate is provided with a plurality of guard plate through holes, the foundation pit support device also comprises a slope anchor rod with a lower end corresponding to the number of the guard plate through holes and used for inserting into the foundation pit slope, the foundation pit support device also comprises an anchor rod support seat connected to the outer side of the guard plate through holes by bolts, an anchor rod ball groove is provided on the anchor rod support, an anchor rod ball head is rotatably mounted in the anchor rod ball groove, and an anchor rod through hole is provided on the anchor rod ball head, the foundation pit support device also comprises an anchor pad plate for sleeved on the outer side of the upper end of the anchor rod, a conical anchor groove is provided on the anchor pad plate, at least two anchor clips arranged along the circumference of the anchor rod are provided between the conical anchor groove and the anchor rod, and the lower end of the anchor pad plate is fixedly connected to the ball head.

[0008] Furthermore, a ball head support sleeve is threadedly connected in the through hole of the guard plate, the inner hole of the ball head support sleeve is for the slope anchor rod to pass through, and the upper end of the ball head support sleeve is used to support and cooperate with the lower end of the anchor rod ball groove.

[0009] Furthermore, the anchor support includes an outer support connected to the slope guard plate through outer bolts, and the anchor support also includes an inner support connected to the outer support through inner bolts. The anchor ball groove is arranged on the inner support, and the upper end of the ball head support sleeve cooperates with the bottom support of the inner support.

[0010] Furthermore, the lower end of the ball head extends into the inner hole of the ball head supporting sleeve.

[0011] Furthermore, the bolt head of the inner bolt is higher than the bolt head of the outer bolt.

[0012] Furthermore, the inner support has a tapered movable opening which is larger at the top and smaller at the bottom on the upper side of the anchor rod ball groove.

[0013] The beneficial effects of the utility model are as follows: when the utility model is used, the slope guard plate is first pressed on the slope of the foundation pit, the drilling machine passes through the guard plate through the guard plate through-hole on the slope guard plate to drill the anchor hole on the slope, the lower end of the slope anchor rod is fixedly connected with the anchor hole, the anchor rod support is connected with the anchor rod support by bolts on the outer side of the slope guard plate, the upper end of the slope anchor rod passes through the anchor rod through-hole on the anchor rod ball head and the cone anchor groove, an anchor clip is arranged between the anchor rod and the cone anchor groove, and due to the rotation of the anchor rod ball head and the anchor rod ball groove Therefore, even if the slope anchor is not completely perpendicular to the slope guardplate due to drilling errors of the anchor holes or installation errors of the slope anchor, the anchor ball head and the anchor ball groove will adaptively rotate, so that the anchor clips are evenly distributed on the periphery of the slope anchor, and the force exerted by the slope anchor on the anchor clips is uniform, avoiding uneven force on one side of the anchor clip and causing it to burst out of the cone anchor groove, thereby avoiding the problem of anchor failure caused by the collapse of the anchor clip. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0015] Figure 1 It is a schematic diagram of the coordination between the slope anchor rod and the slope guard plate in the prior art of the utility model;

[0016] Figure 2 This is a diagram of the use state of an embodiment of a foundation pit supporting device in the utility model;

[0017] Figure 3 yes Figure 2 A in the enlarged view;

[0018] Figure 4 It is a schematic diagram of the coordination between the outer support and the inner support in the direction perpendicular to the slope guard plate;

[0019] Figure 5 yes Figure 2 Schematic diagram of the coordination between the middle slope anchor rod and the anchor clip;

[0020] 1. Foundation pit slope; 2. Slope guard plate; 3. Slope anchor rod; 4. Anchor clip; 5. Anchor pad; 6. Guard plate perforation; 7. Outer support; 8. Outer bolt; 9. Inner support; 10. Inner bolt; 11. Anchor rod ball head; 12. Conical movable mouth; 13. Ball head support sleeve; 14. Anchor rod perforation; 15. Conical anchor groove. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] In the utility model, a foundation pit support device is implemented as follows Figures 1 to 5 As shown:

[0024] The invention comprises a slope guard plate 2 for buckling on the outer side of the foundation pit slope. In the present embodiment, the foundation pit slope 1 is a slope. The slope guard plate 2 is provided with a plurality of guard plate through holes 6. The foundation pit support device also comprises a slope anchor 3 whose lower end corresponds to the number of the 6 guard plate through holes and is used to be inserted into the foundation pit slope. The foundation pit support device also comprises an anchor support seat connected to the outer side of the guard plate through holes by bolts. An anchor ball groove is provided on the anchor support seat. An anchor ball head 11 is rotatably mounted in the anchor ball groove. An anchor through hole 14 is provided on the anchor ball head 11. The foundation pit support device also comprises an anchor pad 5 for being sleeved on the outer periphery of the upper end of the anchor rod. A conical anchor groove 15 is provided on the anchor pad plate. Three anchor clips 4 arranged circumferentially along the slope anchor rod 3 are provided between the conical anchor groove 15 and the slope anchor rod 3. The lower end of the anchor pad plate is fixedly connected to the anchor ball head 11. In the present embodiment, the axial direction of the slope anchor rod is defined as the up and down direction.

[0025] In order to increase the bearing capacity of the anchor ball head, an internal thread is provided on the hole wall of the guard plate perforation, and a ball head support sleeve 13 is threadedly connected in the guard plate perforation. The inner hole of the ball head support sleeve 13 is for the slope anchor to pass through, and the upper end of the ball head support sleeve 13 is used to support and cooperate with the lower end of the anchor ball groove.

[0026] In this embodiment, the anchor support includes an outer support 7 connected to the slope guard plate 2 through an outer bolt 8, and a threaded hole is provided on the slope guard plate 2 to realize the threaded connection with the outer bolt. The anchor support also includes an inner support 9 connected to the outer support through an inner bolt 10. The anchor ball groove is arranged on the inner support 9, and the upper end of the ball head support sleeve 13 is supported and matched with the bottom of the inner support. The lower end of the ball head extends into the inner hole of the ball head support sleeve, and the ball head support sleeve supports the bottom of the inner support. Because the lower end of the anchor ball groove has a weak force position, the bearing capacity of the anchor ball groove can be improved under the support of the ball head support sleeve.

[0027] The bolt head height of the inner bolt 10 is higher than the bolt head height of the outer bolt 8 , so when the inner bolt is screwed, the interference of the outer bolt with the inner bolt can be avoided, and the screwing of the inner bolt is simple and convenient.

[0028] The inner support 9 has a tapered movable opening 12 on the upper side of the anchor ball groove, which is larger at the top and smaller at the bottom. The setting of the tapered movable opening 12 can increase the movable range of the anchor plate 5. The cross-sectional shape of the anchor plate is a T-shaped structure with a large diameter at the upper end and a small diameter at the lower end.

[0029] When in use, first buckle the slope guard plate on the slope of the foundation pit, drill a hole on the slope of the foundation pit through the perforation of the guard plate, then fix the lower end of the slope anchor rod in the drill hole, then withdraw the drilling rig, screw the ball head support sleeve into the perforation of the guard plate, fix the outer support to the slope guard plate through the outer bolt, connect the ball head and the anchor plate sleeve to the upper end of the slope anchor rod, fix the inner support to the outer support through the inner bolt, tension the slope anchor rod, place three anchor clips in the cone anchor groove of the slope anchor rod and the anchor plate, release the tension on the slope anchor rod, and the slope anchor rod rebounds to automatically realize the fixation between the three anchor clips and the slope anchor rod. Due to the existence of the ball head structure, even if the slope anchor rod is not completely perpendicular to the slope guard plate, it can ensure that the slope anchor rod and the cone anchor groove are coaxial. Therefore, the force on the three anchor clips is uniform, and there will be no problem of the anchor clip on one side being overstressed and collapsing.

[0030] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0031] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0032] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A foundation pit support device, comprising a slope guard plate for buckling on the outside of a foundation pit slope, the slope guard plate being provided with a plurality of guard plate through holes, and the foundation pit support device further comprising a slope anchor rod having a lower end corresponding to the number of the guard plate through holes and being inserted into the foundation pit slope, characterized in that: The foundation pit support device also includes an anchor rod support connected to the outer side of the guard plate perforation by bolts, the anchor rod support is provided with an anchor rod ball groove, the anchor rod ball head is rotatably assembled in the anchor rod ball groove, and the anchor rod perforation is provided on the anchor rod ball head. The foundation pit support device also includes an anchor pad plate used to be sleeved on the outer periphery of the upper end of the anchor rod, the anchor pad plate is provided with a conical anchor groove, and at least two anchor clips arranged along the circumference of the anchor rod are provided between the conical anchor groove and the anchor rod, and the lower end of the anchor pad plate is fixedly connected to the ball head.

2. The foundation pit supporting device according to claim 1, characterized in that: A ball head support sleeve is threadedly connected in the through hole of the guard plate, the inner hole of the ball head support sleeve is for the slope anchor rod to pass through, and the upper end of the ball head support sleeve is used for supporting and cooperating with the lower end of the anchor rod ball groove.

3. The foundation pit supporting device according to claim 2, characterized in that: The anchor support includes an outer support connected to the slope guard plate through outer bolts, and the anchor support also includes an inner support connected to the outer support through inner bolts. The anchor ball groove is arranged on the inner support, and the upper end of the ball head support sleeve cooperates with the bottom support of the inner support.

4. The foundation pit supporting device according to claim 3, characterized in that: The lower end of the ball head extends into the inner hole of the ball head supporting sleeve.

5. The foundation pit supporting device according to claim 3, characterized in that: The bolt head of the inner bolt is higher than the bolt head height of the outer bolt.

6. The foundation pit supporting device according to any one of claims 3 to 5, characterized in that: The inner support is provided with a tapered movable opening which is larger at the top and smaller at the bottom at the upper side of the anchor rod ball groove.

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