A twist drill for testing the compaction of foundation soil

Abstract

A twist drill device for detecting the compaction of foundation soil includes a column connected to the drilling rig's transmission. The column is connected to the twist drill via a torque ring, and multiple blades are installed on the twist drill. The torque ring includes a ring body with an internal thread at the top and an external thread at the bottom. A torque sensor and a cavity are installed within the ring body. A Bluetooth module, a power supply, and a microprocessor are housed within the cavity. The torque sensor is connected to the microprocessor, which is connected to a remote smart terminal via the Bluetooth module. This invention directly installs a torque ring device between the drilling rig column and the twist drill. This device can measure the torque and pressure exerted by the column on the twist drill in real time and transmit the torque and pressure data to a smart terminal via Bluetooth technology. This invention solves the problem that core samples obtained using twist drills are in a completely disturbed state, making it impossible for the operator to determine the compaction of the foundation soil on-site.

Description

Technical Field

[0001] This utility model relates to an engineering surveying method, and more particularly to a device for testing the compaction of foundation soil using a twist drill. Background Technology

[0002] Currently, various types of drilling bits are used in engineering surveys, with twist drills being a commonly used type. Twist drills are generally suitable for engineering surveys of soil layers such as cohesive soil, silt, sand, loess, and fill. During drilling, the twist drill bit slowly rotates and drills into the soil under the downward pressure and rotational drive of the drilling rig column (the column being the power drive shaft of the drilling rig). After the twist drill has drilled to a certain depth (i.e., the designed depth), the drilling rig stops rotating the column, and the hydraulic system is used to lift the column, bringing the twist drill and soil to the surface. The surveyor then visually inspects the soil, recording its type, condition, and density. The information recorded on-site is crucial first-hand data. Experienced surveyors are adept at identifying soil types (cohesive soil, silt, sand, loess, and fill) on-site. The classification of soil (silt, sand, etc.) is not problematic. However, because the twist drill completely destroys the original state of the soil during the drilling process (in the standard, cohesive soil is classified as fluid plastic, soft plastic, plastic, hard plastic, and hard; silt is classified as slightly dense, medium dense, and dense; and sand is classified as loose, slightly dense, medium dense, and dense), the descriptor cannot determine the density of the soil. Instead, they make a rough judgment and record it based on experience. However, the density of the soil is an important reference for the mechanical properties of foundation soil, and the accuracy of the judgment and recording directly affects the selection of the mechanical properties of foundation soil. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to obtain accurate soil compaction in twist drill surveys. Therefore, a device for detecting the compaction of foundation soil in twist drill surveys is provided.

[0004] To solve the above problems, this utility model is achieved through the following technical solution:

[0005] A twist drill for detecting the compaction of foundation soil includes a column connected to the transmission of a drilling rig, the column being connected to the twist drill via a torque ring, and the twist drill having multiple blades.

[0006] The torque ring includes a ring body with an internal torque ring thread on the upper part and an external torque ring thread on the bottom part. A torque sensor and a cavity are provided inside the ring body. A Bluetooth module, a power supply, and a microprocessor are provided inside the cavity. The torque sensor is connected to the microprocessor, and the microprocessor is connected to a remote smart terminal via the Bluetooth module. A power switch is provided on the outer wall of the ring body.

[0007] The power source located inside the cavity is a dry cell battery.

[0008] The bottom of the column is provided with an external thread, which mates with the internal thread of the torque ring.

[0009] The twist drill has an internal thread at its top, which mates with the torque ring's external thread.

[0010] Compared with existing technologies, this invention has the following advantages: By directly installing a torque ring device between the drilling rig column and the twist drill, this device can measure the torque and pressure of the column on the twist drill in real time, and can transmit the torque and pressure data to a smart terminal (such as a smartphone, tablet, etc.) via Bluetooth technology in real time. This invention solves the problem that the rock core obtained by using a twist drill is in a completely disturbed state, and the surveyor cannot identify the compaction of the foundation soil on site. Without increasing the survey cost, it greatly improves the accuracy of on-site description, makes the first-hand data obtained on-site more reliable, and improves the quality of survey work. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the present invention;

[0012] Figure 2 This is a structural diagram of the torque ring. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figure 1 , Figure 2 As shown, a twist drill for detecting the compaction of foundation soil includes a column 1 connected to the drill rig drive. The column 1 is connected to the twist drill 3 via a torque ring 2. Multiple blades 4 are provided on the twist drill 3.

[0016] The torque ring 2 includes a ring body 21, with an internal torque ring thread 22 on the upper part of the ring body 21 and an external torque ring thread 29 on the bottom of the ring body 21. A torque sensor 23 and a cavity 24 are arranged inside the ring body. A Bluetooth module 25, a power supply 26, and a microprocessor 27 are arranged inside the cavity. The torque sensor 23 is connected to the microprocessor 27. The microprocessor 27 is connected to a remote smart terminal through the Bluetooth module 25. The power supply 26 supplies power to all components, and a power switch 28 is arranged on the outer wall of the ring body 21.

[0017] The power source 26 located inside the cavity 24 can be a dry cell battery.

[0018] Furthermore, an external thread 11 is provided at the bottom of the column 1, which engages with the internal thread 22 of the torque ring.

[0019] Furthermore, a twist drill internal thread 31 is provided on the top of the twist drill 3, and the twist drill internal thread 31 mates with the torque ring external thread 29.

[0020] The working principle of this utility model is as follows:

[0021] After the drilling rig is in place, connect the inner thread 22 of the torque ring to the outer thread 11 of the column at the lower end of the drilling rig column, and connect the lower end of the outer thread 29 of the torque ring to the twist drill 3. As the hole depth increases, any number of drill rods can be added between the torque ring 2 and the twist drill 3. After placing the lower end of the twist drill 3 on the ground or at the bottom of the hole, start the remote intelligent terminal and put the remote intelligent terminal into data receiving mode.

[0022] In use, first connect the power supply 26, then start the Bluetooth module 25, microprocessor 27 and torque sensor 23. During the drilling operation, the torque sensor 23 can measure the torque value and vertical pressure borne by the torque ring 2 in real time. When the torque value and vertical pressure reach the set value at the same time, the microprocessor 27 converts the torque value and vertical pressure value into electrical signals and sends them out through the Bluetooth module 25 at set intervals. The signals are then received by the remote smart terminal.

[0023] The drilling rig is started, and torque and pressure are applied to torque ring 2 through the rotating column, which drives the lower drill rod and twist drill to rotate and drill. During the drilling process, the rotation speed and pressure value are controlled within the standard range. The remote intelligent terminal receives a set of torque and pressure data at set intervals. After the current drilling cycle is completed, the rotation is stopped, the remote intelligent terminal receiving mode is turned off, the drill bit is lifted, and the twist drill and soil are lifted to the ground. The rock core is then neatly arranged in order, and the next drilling cycle is started. This process is repeated until the designed hole depth is reached. During the next drilling cycle, the describer describes the rock core from the previous cycle and inputs information such as soil type and drilling depth into the remote intelligent terminal.

[0024] This invention solves the problem that core samples obtained using twist drills are in a completely disturbed state, making it impossible for surveyors to determine the compactness of the foundation soil on-site. Without increasing surveying costs, it significantly improves the accuracy of on-site descriptions, making first-hand data obtained from the survey site more reliable and improving the quality of surveying work. It also allows for quantitative assessment of the compactness and uniformity of fill. With the accumulation of survey data, a relationship is established between torque and pressure data and multiple mechanical indicators of the foundation soil. During on-site drilling, parameters such as foundation bearing capacity, compression modulus, pile side friction, and end friction calculated by a remote intelligent terminal field can be used to roughly determine the foundation type, depth, and pile length, thereby determining the appropriate drilling depth. This avoids rework due to insufficient hole depth or cost waste due to excessive hole depth, thus improving work efficiency and saving surveying costs.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A device for testing the compaction of foundation soil using a twist drill, characterized in that: Includes a column (1) connected to the drilling rig drive, the column (1) is connected to a twist drill (3) via a torque ring (2), and multiple blades (4) are provided on the twist drill (3); The torque ring (2) includes a ring body (21), with an internal torque ring thread (22) on the upper part of the ring body (21) and an external torque ring thread (29) on the bottom of the ring body (21). A torque sensor (23) and a cavity (24) are provided inside the ring body. A Bluetooth module (25), a power supply (26), and a microprocessor (27) are provided inside the cavity. The torque sensor (23) is connected to the microprocessor (27), and the microprocessor (27) is connected to a remote smart terminal through the Bluetooth module (25). A power switch (28) is provided on the outer wall of the ring body (21).

2. The device for detecting the compaction of foundation soil using a twist drill according to claim 1, characterized in that: The power source (26) located in the cavity (24) is a dry cell battery.

3. The device for detecting the compaction of foundation soil using a twist drill according to claim 1, characterized in that: An external thread (11) is provided at the bottom of the column (1), and the external thread (11) of the column is engaged with the internal thread (22) of the torque ring.

4. The device for detecting the compaction of foundation soil using a twist drill according to claim 1, characterized in that: The top of the twist drill (3) is provided with a twist drill internal thread (31), which is engaged with the torque ring external thread (29).

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