Pebble stratum damage-free drill bit for pile foundation construction

Abstract

A pebble stratum damage-free drill bit for pile foundation construction relates to the technical field of pile foundation construction and comprises a cylindrical drill bit casing and a drill rod connected to the center of the top face of the drill bit casing, and the drill rod is connected with a drilling machine. A layer of steel wire rope net is arranged above a lower opening in the drill casing to form a drill opening brush, the layer of steel wire rope net is located in the same plane and formed by annularly arranging steel wire ropes, one end of each steel wire rope is fixed to the drill casing and twisted in the same direction, and the other end of each steel wire rope points to the circle center of the layer. An opening and closing opening is formed in the lower portion of the drill pile casing, a side opening opening and closing door is correspondingly hinged to the opening and closing opening, a circular exhaust hole is formed in the drill pile casing and above the side opening opening and closing door, and the bottom end of the side opening opening and closing door is fixed to the drill pile casing through a plug. The problems that in the drilling construction process, time and labor are wasted due to the fact that an excavator is adopted for deep excavation, replacement and filling for obstacle clearing, the obstacle clearing depth is large, and the construction risk is high when a pile casing is installed after clearing is completed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a pebble stratum non-destructive drill bit for pile foundation construction. Background Art

[0002] During the construction of pebble strata projects or renovation and expansion projects, the original foundation and other structures need to be chiseled out, but some obstacles such as gravel still remain. When pile foundation construction is carried out under this condition, the remaining obstacles cause a large number of large concrete fragments to accumulate at the bottom of the pile hole during the bored pile drilling construction process, causing the bored pile drill bit to be unable to drill down and the drill bit to be easily damaged.

[0003] The traditional approach is to use an excavator to dig deep, replace fill and clear obstacles, which is time-consuming and labor-intensive, and the clearance depth is large. After the cleaning is completed, the casing is installed, which is very dangerous. The use of a rotary drilling rig in combination with manual stone removal has low construction efficiency and a high risk factor. Utility Model Content

[0004] The utility model aims to provide a non-destructive drill bit for pebble formations for pile foundation construction, which solves the problem that deep digging, replacement and clearance by an excavator is time-consuming and labor-intensive during the drilling construction process, the clearance depth is large, and the casing is installed after the cleaning is completed, which is dangerous; at the same time, it solves the problem that the construction efficiency is low and the risk factor is high when a rotary drilling rig is used in combination with manual stone removal.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A non-destructive drill bit for pebble formations for pile foundation construction comprises a cylindrical drill casing and a drill rod connected to the center of the top surface of the drill casing, wherein the drill rod is connected to a drilling rig; a layer of wire rope net is arranged above the lower opening of the drill casing to form a drill mouth brush, wherein the layer of wire rope net is located in the same plane, wherein the wire rope net is formed by annularly arranged wire ropes, wherein one end of the wire ropes is fixed to the drill casing and twisted in the same direction, and the other end points to the center of the circle of the layer; an opening and closing opening is provided at the lower part of the drill casing, wherein a side opening and closing door is hingedly connected to the opening and closing opening, wherein circular exhaust holes are provided on the drill casing and above the side opening and closing door, wherein the bottom end of the side opening and closing door is fixed to the drill casing by a bolt; ribs are arranged on the outer side of the drill casing, wherein the ribs are spirally coiled along the drill casing; and a circle of blades is welded at intervals at the lower opening of the drill casing.

[0007] A further preferred technical solution is that the drill casing is a hollow structure, the upper opening is provided with a top plate, and the lower opening is an open opening.

[0008] A further preferred technical solution: the thickness of the drill casing is 10 mm.

[0009] A further preferred technical solution is that the ribs are spirally arranged along the drill casing in a clockwise direction.

[0010] A further preferred technical solution is that the ribs are arranged at intervals along the outer wall of the drill casing.

[0011] A further preferred technical solution is that a circle of blades are arranged tilted and tilted spirally in a clockwise direction.

[0012] A further preferred technical solution is as follows: a layer of wire rope net is 10-15 cm away from the lower opening of the drill casing.

[0013] A further preferred technical solution: the wire rope net is made of A18mm steel wire rope.

[0014] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0015] 1. The utility model improves the drill bit and adds a bottom wire rope net to effectively store the pile bottom stones in the drill bit.

[0016] 2. The utility model provides a side opening and closing door and an exhaust hole on the side wall of the drill bit, so as to facilitate the removal of stones after the drill is lifted and exhaust the gas in the drill bit during drilling, thereby ensuring continuous drilling construction.

[0017] 3. The utility model is based on the original rotary drilling rig drill bit, and adds a drill mouth brush with a wire rope net and a side opening and closing door on the side wall. The drill mouth brush is used to collect stones in the drill bit, and then discharged through the side opening and closing door, so as to achieve the purpose of clearing obstacles such as pebbles in the formation.

[0018] 4. The entire drill bit of the utility model is easy to improve, simple to manufacture and low in cost.

[0019] 5. The utility model improves the drill bit, adds a bottom wire rope net and a side opening and closing door, and realizes the simultaneous construction of drilling and clearing stones in the pebble stratum; when encountering obstacles such as stones during drilling, the improved drill bit stores large-volume stones in the drill bit, and after the drill is lifted, the stones are removed through the side opening and closing door to achieve the purpose of clearing stones.

[0020] 6. The utility model is simple to improve and innovative, greatly improving the efficiency of stone cleaning with low cost. In addition, the drill bit is used for drilling and cleaning stones without the need for the cooperation of other machines. Only the side opening door of the drill bit side wall needs to be opened and closed manually when removing stones, so that construction safety is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a stereoscopic diagram of a non-damaging drill bit for pebble formation used for pile foundation construction of the utility model;

[0022] Figure 2 It is a schematic diagram of the utility model wire rope net;

[0023] Figure numerals: 1 - drill rod; 2 - exhaust hole; 3 - side opening and closing door; 4 - bolt; 5 - rib; 6 - blade; 7 - drill bit casing; 8 - wire rope net. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model discloses a non-destructive drill bit for pebble formation for pile foundation construction, comprising a cylindrical drill casing 7 and a drill rod 1 connected to the center of the top surface of the drill casing 7, wherein the drill rod 1 is connected to a drilling rig; the drill casing 7 is a hollow structure, wherein the upper opening is provided with a top plate, and the lower opening is an open opening; the thickness of the drill casing 7 is 10 mm; a layer of steel wire rope net 8 is provided above the lower opening in the drill casing 7 to form a drill mouth brush, wherein the layer of steel wire rope net 8 is located in the same plane, and the steel wire rope net 8 is formed by steel wire ropes arranged in a ring shape, wherein one end of the steel wire rope is fixed on the drill casing 7 and twisted in the same direction, and the other end points to the center of the circle of the layer; the distance between the layer of steel wire rope net 8 and the lower opening of the drill casing 7 is 10-15 cm; the steel wire rope net 8 is made of A18 mm steel wire rope; the spacing of the steel wire rope nets is uniform, and it is guaranteed to support stones after installation Do not fall back; an opening and closing port is provided at the lower part of the drill casing 7, and a side opening opening and closing door 3 is hinged at the opening and closing port. Circular exhaust holes 2 are provided on the drill casing 7 and above the side opening opening and closing door 3, and the bottom end of the side opening opening and closing door 3 is fixed to the drill casing 7 by a plug 4; ribs 5 are provided on the outer side of the drill casing 7, and the ribs 5 are spirally coiled along the drill casing 7; the ribs 5 are spirally coiled along the drill casing 7 in a clockwise direction; the ribs are arranged at intervals along the outer wall of the drill casing 7; a circle of blades 6 are welded at intervals at the lower mouth of the drill casing 7, and a circle of blades 6 is inclined and spirally inclined in a clockwise direction; the drill rod 1 is connected to the drilling rig, the GPS-10 drilling rig is in place according to the predetermined pile, and the drilling rig is stopped on hard ground, the mast deviation is adjusted to ensure that the displacement and inclination do not exceed the standard, and the adjustment is checked and adjusted from time to time during the drilling process.

[0026] The utility model improves the drill bit, adds a bottom wire rope net and a side opening and closing door, thereby realizing the synchronous construction of drilling and clearing stones in the pebble stratum; when encountering obstacles such as stones when drilling, the improved drill bit stores large-volume stones in the drill tool, and after the drill is lifted, the stones are removed through the side wall opening and closing door to achieve the purpose of clearing stones; the utility model is simple in improvement and innovative, greatly improves the stone cleaning efficiency and has low cost, and uses the drill bit to perform drilling and stone cleaning without the cooperation of other machinery, and only requires manual cooperation in opening and closing the opening and closing door of the drill tool side wall when removing stones, thereby ensuring construction safety.

[0027] The utility model discloses a construction method of a non-damaging drill bit for pebble stratum pile foundation construction:

[0028] The first step is to bury the pile foundation casing: the pile foundation casing is made of rolled steel plate, with a diameter 20cm larger than the pile diameter and a length of about 2m. Each drilling rig is equipped with two pile foundation casings. According to the measurement and positioning, after the foundation pit is excavated, the pile foundation casing is buried in place manually with the help of a car crane. The buried depth is 1.5m below the ground, and the exposed part of the pile foundation casing is 0.5m above the existing ground. The pile foundation casing is symmetrically backfilled with clay with the best moisture content around it, and it must be symmetrically compacted in layers while backfilling to ensure that the pile foundation casing is not tilted and the slurry is not exposed. After the burial is completed, the next step of construction can be carried out after inspection by the supervision engineer.

[0029] Step 2: Put the drilling rig in place: Before putting the drilling rig in place, level and fill the foundation, put the drilling rig in the designated position, and adjust the angles of the mast and drill rod under the guidance of technical personnel; After the drilling rig is installed in place, carefully level it to ensure that no tilting or shifting occurs during construction.

[0030] Step 3: Pile hole drilling:

[0031] 1. Drill bit improvement: Use wire rope to form a wire rope net at the bottom of the drill bit, open a square hole on the side wall of the drill bit casing to form a side opening and closing door for stone removal, and open multiple round holes on the side wall to form exhaust holes to facilitate the discharge of gas during drilling.

[0032] 2 Pile drilling: When the drilling speed is slow in the pebble layer, it can be concluded that larger pebbles are encountered. At this time, the drilling pressure should be appropriately increased. By squeezing the larger pebbles, the stones are reversely pressed into the drill casing and stored under the action of the drilling rig, and small particles of soil and stones leak out from the wire rope net.

[0033] Step 4: Lift the drill and remove stones: When the drill bit is full of stones, lift the drill and transfer the drill bit to the stone storage area. Open the side opening door on the side wall of the drill casing, manually remove the stones, then close the side opening door and continue drilling until the final hole is reached.

[0034] The utility model discloses a non-destructive drill bit for pebble formations for pile foundation construction, which has the following working principles: the non-destructive drill bit for pebble formations for pile foundation construction consists of three parts: a drilling system, a stone storage system and a stone discharge system; a blade is welded at the front end of the lower opening of a drill casing to facilitate drilling and cutting of stone soil, thereby forming a drilling system; a plurality of steel wire ropes are installed at the bottom of the drill casing to form a steel wire mesh opening to form a stone storage system with the drill casing; a side opening opening and closing door and an exhaust hole are opened on the side of the drill casing to discharge stones stored in the drill casing and to discharge gas in the drill casing when drilling; the side opening opening and closing door is connected to the drill casing with a plug to facilitate opening and closing to form a stone discharge system.

[0035] The drill rod of the drill bit is connected to the drilling rig.

[0036] During construction, the center of the drill bit is aligned with the pile core, and the drilling rig is started. The drill casing and the blade are driven to drill into the soil in turn through the drill rod. When encountering soil and stones during the drilling process, small particles of soil and stones are broken due to rotation and squeezing, and the mixed mud and water leak out from the wire rope net; when the stone particles are large, the stones are pressed into the casing in the opposite direction and stored under the action of the drilling rig; after drilling a certain distance, the casing is lifted, small particles of soil and stones leak out from the wire rope net, and large particles of stones remain in the casing; the opening and closing door on the side of the drill casing is opened, and then the large particles of soil and stones are poured out, and then drilling is continued until the drilling is completed.

[0037] The side wall of the drill casing is provided with exhaust holes, which can facilitate the discharge of underground air and facilitate the continuous drilling of the drill casing. A side door that can be opened and closed can facilitate the dumping of large particles of soil and stones.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A non-damaging drill bit for pebble formations for pile foundation construction, characterized in that: It comprises a cylindrical drill casing (7) and a drill rod (1) connected to the center of the top surface of the drill casing (7), and the drill rod (1) is connected to a drilling machine; A layer of wire rope net (8) is provided above the lower opening of the drill casing (7) to form a drill opening brush. The layer of wire rope net (8) is located in the same plane. The wire rope net (8) is formed by annularly arranged wire ropes. One end of the wire rope is fixed to the drill casing (7) and twisted in the same direction, and the other end points to the center of the layer. The lower part of the drill casing (7) is provided with an opening and closing opening. A side opening and closing door (3) is hingedly connected to the opening and closing opening. Circular exhaust holes (2) are provided on the drill casing (7) and above the side opening and closing door (3). The bottom end of the side opening and closing door (3) is fixed to the drill casing (7) through a bolt (4). Ribs (5) are provided on the outer side of the drill casing (7). The ribs (5) are spirally arranged along the drill casing (7). A circle of blades (6) are welded at intervals at the lower opening of the drill casing (7).

2. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: The drill casing (7) is a hollow structure, with a top plate provided at the upper opening and an open opening at the lower opening.

3. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: The thickness of the drill casing (7) is 10 mm.

4. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: The ribs (5) are spirally arranged along the drill casing (7) in a clockwise direction.

5. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: The ribs are arranged at intervals along the outer wall of the drill casing (7).

6. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: A circle of blades (6) are arranged obliquely and are inclined in a spiral clockwise direction.

7. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: The distance between one layer of wire rope net (8) and the lower opening of drill casing (7) is 10-15cm.

8. The pebble stratum non-damaging drill bit for pile foundation construction according to claim 1, characterized in that: The wire rope net (8) is made of A18mm steel wire rope.

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