Adjustable foundation pit slope soil nail hole angle auxiliary tool

Abstract

The utility model relates to an adjustable foundation pit side slope soil nail hole forming angle auxiliary tool, including calibration arm, pasting slope arm, guide arm, indicating needle, and horizontal detection unit, calibration arm and guide arm are all length adjusting arms, the front end perpendicular connection of calibration arm has pasting slope arm, the rear end fixed of calibration arm has protractor, set up horizontal detection unit on calibration arm to detect whether calibration arm is level, the rear end fixed connection of guide arm has indicating needle, the rear end of guide arm is hinged connection with the rear end of calibration arm through angle locking assembly and can lock, and the hinge point is located the center of protractor, makes indicating needle can rotate with the center of protractor as the center and indicates angle. The utility model has the advantages of intuitive angle setting, repeatable positioning, large adjustment range, strong structural stability, wide construction adaptability and the like, significantly improves the accuracy and construction efficiency of drilling angle control, and is especially suitable for complex terrain, space limited and the like small and medium foundation pit side slope support operation scene.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit slope support construction technology, specifically to an adjustable foundation pit slope soil nailing hole-forming angle auxiliary tool. Background Technology

[0002] Controlling the drilling angle of soil nails is a crucial step in the construction of foundation pit support systems, playing a vital role in the stability of the pit slope. It requires the holes to be drilled straight into the slope at a fixed angle. Currently, there are various methods for controlling the drilling angle on construction sites, mainly including the following:

[0003] ① Traditional soil nailing hole formation relies heavily on experience to control the angle, which can easily lead to deviations and inclination errors exceeding the specifications, thus affecting the support effect.

[0004] ② Using angle control tools such as total stations and laser guides is costly and complex to operate, and is not suitable for small and medium-sized projects.

[0005] ③ Using a simple support for hole-forming angle control has the drawbacks of poor stability and inability to adapt to different slopes.

[0006] ④ Some patented devices on the market have complex angle adjustment mechanisms that require electric drive. Their fixed angle design cannot adapt to changing working conditions.

[0007] Therefore, in small and medium-sized projects, manual drilling with tools such as Luoyang shovels and small drilling rigs is often used to meet the requirements of construction flexibility and cost control. However, existing hole-forming angle control tools suitable for small and medium-sized projects cannot adapt to different slope gradients and hole-forming angles. They rely on worker experience and suffer from poor positioning flexibility and accuracy. Therefore, a low-cost, power-free, and quick-adjustment soil nailing hole-forming auxiliary tool is needed.

[0008] Therefore, it is necessary to study an adjustable tool for drilling holes in soil nails on foundation pit slopes. Utility Model Content

[0009] Therefore, the purpose of this utility model is to provide an adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes, which can effectively solve the problems of poor positioning flexibility and poor positioning accuracy of existing hole-forming angle control tools suitable for small and medium-sized projects.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] An adjustable tool for drilling holes in soil nails on foundation pit slopes includes a calibration arm, a slope-adhering arm, a guide arm, an indicator needle, and a level detection unit.

[0012] Both the calibration arm and the guide arm are length-adjustable arms;

[0013] The front end of the calibration arm is vertically connected to a slope-adhesive arm, the rear end of the calibration arm is fixed with a protractor, and a level detection unit is provided on the calibration arm to detect whether the calibration arm is level.

[0014] The rear end of the guide arm is fixedly connected to an indicator needle. The rear end of the guide arm is hinged to the rear end of the calibration arm through an angle locking assembly and can be locked. The hinge point is located at the center of the protractor, so that the indicator needle can rotate around the center of the protractor and indicate the angle.

[0015] Furthermore, the level detection unit includes a first level and a second level. The first level is set on the calibration arm in the front-to-back direction, and the second level is set on the slope-adhering arm in the left-to-right direction.

[0016] Furthermore, both the calibration arm and the slope-adhesive arm are made of square steel tubing, and the first and second level rulers are both strong magnetic level rulers, which are magnetically attached to the corresponding calibration arm and slope-adhesive arm respectively.

[0017] Furthermore, the angle locking assembly includes a wing screw kit, and the rear end of the calibration arm, the rear end of the guide arm, and the center of the protractor are respectively provided with rotating holes. The wing screw kit passes through the rotating holes to hinge the calibration arm and the guide arm and lock them in place.

[0018] Furthermore, both the calibration arm and the guide arm include a rectangular hollow outer arm and an inner arm, with the inner arm sleeved inside the outer arm. Fasteners are threaded through the outer arm to lock the outer arm and the inner arm together.

[0019] Furthermore, the front end face of the calibration arm is provided with anchors, and when the anchors are fully inserted into the slope, the slope-adhering arm is in contact with the slope surface.

[0020] Furthermore, it also includes an anchor seat, the calibration arm is a hollow tube, the anchor seat is fixedly sleeved inside the calibration arm, and the anchor is fixed on the anchor seat and extends out of the calibration arm.

[0021] The beneficial effects of the above technical solution are:

[0022] This invention employs an angle control structure with a hinged calibration arm and a guide arm. The drilling angle is intuitively set and precisely calibrated by rotating an indicator needle on a protractor. In use, the operator first adjusts the indicator needle position according to the designed angle. Then, the angle locking component located at the center of the protractor stably locks the guide arm and calibration arm at the target angle. The calibration arm and guide arm are then placed on the corresponding position on the slope of the foundation pit, ensuring the slope-adhering arm is flush against the slope surface to limit lateral tilt. The calibration arm is leveled using a horizontal detection unit, ensuring the entire structure remains stable and reliable in space. At this point, the direction pointed to by the front end of the guide arm is the set drilling direction; the operator simply needs to drill along the direction of the guide arm.

[0023] Compared with the experience-based visual estimation, simple supports, or fixed templates commonly used in existing small and medium-sized projects, this utility model has the advantages of intuitive angle setting, repeatable positioning, large adjustment range, strong structural stability, and wide construction adaptability. It significantly improves the accuracy of drilling angle control and construction efficiency, and is particularly suitable for small and medium-sized foundation pit slope support operations in complex terrain and space-constrained environments. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the calibration arm;

[0026] Figure 3 This is a schematic diagram of the guide arm;

[0027] Figure 4 This is a schematic diagram of the angle locking assembly;

[0028] Figure 5 This is a schematic diagram of the assembly of the anchor seat and anchoring in Example 2.

[0029] Reference numerals in the attached drawings: 1 is the calibration arm, 2 is the slope arm, 3 is the guide arm, 4 is the indicator needle, 5 is the protractor, 6 is the first level, 7 is the second level, 8 is the angle locking assembly, 9 is the anchor, 10 is the anchor seat, 101 is the outer arm, 102 is the inner arm, and 103 is the fastener. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] This embodiment aims to provide an adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes. It is a portable auxiliary tool used to control the drilling angle of soil nails. It is mainly used for manual or small-scale mechanical hole-forming operations on soil nailing walls of slopes. It addresses the problems of poor positioning flexibility and poor positioning accuracy of existing hole-forming angle control tools suitable for small and medium-sized projects.

[0032] An adjustable tool for assisting in drilling holes for soil nailing on foundation pit slopes, such as... Figure 1 It includes calibration arm 1, slope arm 2, guide arm 3, indicator needle 4, and level detection unit.

[0033] Both calibration arm 1 and guide arm 3 are length-adjustable arms, each consisting of a rectangular hollow outer arm 101 and an inner arm 102. The outer arm 101 is made of a rectangular steel tube with a cross-sectional dimension of 40mm×20mm×1mm and a length of 1m, while the inner arm 102 is made of a rectangular steel tube with a length of 30mm×15mm×1mm and a length of 1m. The inner arm 102 is fitted inside the outer arm 101, allowing for adjustment of the total arm length. Fasteners 103 are threaded onto the outer arm 101 to connect it to the inner arm. 102 Locking, fastener 103 uses an M12×20mm wing screw and matching nut combination. A 12mm diameter hole is drilled at a position 100mm from the front end of the outer arm 101, and the M12×20mm wing screw and matching nut are welded directly above the hole. The inner arm 102 is inserted into the outer arm 101, and the threads of the wing screw and matching nut are pressed against the outer surface of the inner arm 102, thereby effectively fixing the inner arm 102 and the outer arm 101.

[0034] like Figure 1 and Figure 2 The front end of the calibration arm 1 is vertically welded to the slope-adhering arm 2. The slope-adhering arm 2 is a rectangular steel pipe with a cross-sectional size of 30mm×15mm×1mm and a length of 0.2m. It is used to fit against the slope to determine the left and right angles of the calibration arm 1, ensuring that the calibration arm 1 is directly facing the slope and avoiding left and right tilting.

[0035] A protractor 5 is fixed to the rear end of the calibration arm 1. The protractor 5 is made of iron with a diameter of 230mm and a wall thickness of 2.0mm, and is welded and fixed to the side of the rear end of the calibration arm 1.

[0036] A level detection unit is provided on the calibration arm 1 to detect whether the calibration arm 1 is level. The level detection unit includes a first level 6 and a second level 7. The first level 6 is set on the calibration arm 1 in the front-to-back direction, and the second level 7 is set on the slope-adhesive arm 2 in the left-to-right direction. The level of the calibration arm 1 is ensured by centering the bubbles of the two level 6s. Both the first level 6 and the second level 7 are strong magnetic level 6s and are magnetically attached to their respective calibration arm 1 and slope-adhesive arm 2.

[0037] The rear end of the guide arm 3 is welded and fixedly connected to an indicator needle 4. The indicator needle 4 is made of 130mm×35mm×1mm triangular flat iron, and the end of the indicator needle 4 is exposed by 35mm.

[0038] The rear end of the guide arm 3 is hinged to the rear end of the calibration arm 1 via an angle locking assembly 8 and can be locked. The hinge point is located at the center of the protractor 5, allowing the indicator needle 4 to rotate around the center of the protractor 5 and indicate the angle. Specifically, the rear end of the calibration arm 1, the rear end of the guide arm 3, and the center of the protractor 5 are respectively provided with rotating holes of 12mm diameter, such as... Figure 4 The angle locking assembly 8 uses an M12×20mm wing screw kit. The wing screw kit passes through the rotating hole to hinge the calibration arm 1 and the guide arm 3 and can lock them.

[0039] An anchor 9 is provided on the front end face of the calibration arm 1, and when the anchor 9 is fully inserted into the slope, the slope-adhering arm 2 is in contact with the slope surface. It also includes an anchor seat. The calibration arm 1 is a hollow tube, and the anchor seat is fixedly sleeved inside the calibration arm 1. The anchor 9 is fixed on the anchor seat and extends out of the calibration arm 1.

[0040] In use, the operator first adjusts the position of the indicator needle 4 according to the design angle, and then uses the angle locking component 8 located at the center of the protractor 5 to stably lock the guide arm 3 and the calibration arm 1 at the target angle. Next, the calibration arm 1 and guide arm 3 are placed as a whole at the corresponding position on the slope of the foundation pit. If necessary, the lengths of the guide arm 3 and calibration arm 1 are adjusted to ensure that both ends are against the slope. The calibration arm 1 is leveled using the level detection unit on it, and the slope-adhering arm 2 is pressed tightly against the slope surface to limit lateral tilt, ensuring the overall structure is stable and reliable in space. At this point, the direction pointed to by the front end of the guide arm 3 is the set drilling direction. The operator only needs to drill along the direction of the guide arm 3 to ensure the drilling tilt angle.

Claims

1. An adjustable tool for assisting in drilling holes for soil nailing on foundation pit slopes, characterized in that: It includes a calibration arm, a slope-adhesive arm, a guide arm, an indicator needle, and a level detection unit; Both the calibration arm and the guide arm are length-adjustable arms; The front end of the calibration arm is vertically connected to a slope-adhesive arm, the rear end of the calibration arm is fixed with a protractor, and a level detection unit is provided on the calibration arm to detect whether the calibration arm is level. The rear end of the guide arm is fixedly connected to an indicator needle. The rear end of the guide arm is hinged to the rear end of the calibration arm through an angle locking assembly and can be locked. The hinge point is located at the center of the protractor, so that the indicator needle can rotate around the center of the protractor and indicate the angle.

2. The adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes according to claim 1, characterized in that: The level detection unit includes a first level and a second level. The first level is set on the calibration arm in the front-to-back direction, and the second level is set on the slope-adhering arm in the left-to-right direction.

3. The adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes according to claim 2, characterized in that: Both the calibration arm and the slope-adhesive arm are made of square steel tubes. The first and second level rulers are both strong magnetic level rulers and are magnetically attached to the corresponding calibration arm and slope-adhesive arm, respectively.

4. The adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes according to claim 1, characterized in that: The angle locking assembly includes a wing screw kit. The rear end of the calibration arm, the rear end of the guide arm, and the center of the protractor are respectively provided with rotating holes. The wing screw kit passes through the rotating holes to hinge the calibration arm and the guide arm and lock them in place.

5. The adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes according to claim 1, characterized in that: Both the calibration arm and the guide arm include a rectangular hollow outer arm and an inner arm. The inner arm is sleeved in the outer arm, and fasteners are threaded through the outer arm to lock the outer arm and the inner arm together.

6. An adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes according to any one of claims 1-5, characterized in that: The front end face of the calibration arm is provided with an anchor, and when the anchor is fully inserted into the slope, the slope-adhering arm is in contact with the slope surface.

7. The adjustable soil nailing hole-forming angle auxiliary tool for foundation pit slopes according to claim 6, characterized in that: It also includes an anchor seat, the calibration arm is a hollow tube, the anchor seat is fixedly sleeved inside the calibration arm, and the anchor is fixed on the anchor seat and extends out of the calibration arm.

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