CN214659968U - Novel drill bit structure of nail type cement mixing pile driver - Google Patents

Abstract

The utility model discloses a novel drill bit structure of nail type soil cement mixing pile driver, it includes: a first drill rod; at least one pair of soil cutting blades obliquely arranged on the first drill rod; the long cutting pick is arranged at the end part of the first drill rod and located at the lower end of the soil cutting blade, a first bending stirring cutter is arranged on the first drill rod and located above the soil cutting blade, a second drill rod is sleeved outside the first drill rod, and a second bending stirring cutter is arranged on the second drill rod. The utility model discloses have the effect with hard soil layer smear metal and transmission upwards, solved the problem that conventional cement mixing pile driver is difficult to creep into in the higher soil layer of bearing capacity, and the utility model discloses an automatic stirring sword of buckling, the construction that has realized the diameter pile body that varies is big to ground treatment area, cement mixing pile end need to bore into the deeper condition in holding power layer, and the effect is showing.

Description

Novel drill bit structure of nail type cement mixing pile driver

Technical Field

The utility model belongs to civil engineering ground treatment field. More specifically, the utility model relates to a novel drill bit structure of nail type soil cement mixing pile driver.

Background

For deep silt soil foundations, the cement soil mixing pile composite foundations are commonly treated in China. The pile foundation length needs to penetrate soft soil layers and the pile end can reach a soil layer with relatively high bearing capacity. At present, on the market, the drilling rod bottom of cement mixing pile driver is flat, and most can only be under construction in the soil body, hardly drills in the higher soil layer of bearing capacity, does not have the coarse aggregate to do the material that mainly bears the load wherein, and the pile body intensity of the cement mixing pile of formation is not high, when cement mixing is insufficient, construction quality is not high, can appear necking down, disconnected stake scheduling problem for construction quality is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.

The utility model also aims at providing a novel drill bit structure of nail type soil cement mixing pile driver, it can drill in the higher soil layer of bearing capacity, makes the drilling degree of depth satisfy the designing requirement for construction speed, rationally optimizes pile foundation structure when improving construction quality, material saving.

In order to achieve these objects and other advantages of the present invention, there is provided a drill bit structure of a novel nail type cement mixing pile driver, comprising:

a first drill rod;

at least one pair of soil cutting blades obliquely arranged on the first drill rod;

and the long cutting pick is arranged at the end part of the first drill rod and is positioned at the lower end of the soil cutting blade.

The utility model discloses a set up long pick and can make the stake end creep into in hard soil layer to through the hard soil layer of soil cutting blade smear metal and upwards transmit the soil layer.

Preferably, the soil cutting blade makes an angle of 20-45 ° with a radial cross section of the first drill rod. And the soil cutting blade forms an angle of 20-45 degrees with the radial section of the first drill rod, so that the cuttings and soil layers are favorably conveyed upwards.

Preferably, the soil cutting blades are arranged in 3 pairs, the soil cutting blades at the upper end are perpendicular to the soil cutting blades at the lower end, each pair of soil cutting blades comprises a left soil cutting blade and a right soil cutting blade, and the left soil cutting blade and the right soil cutting blade are symmetrically arranged on two sides of the first drill rod. The soil cutting blades are arranged in 3 pairs, so that the soil cutting mechanism has better continuity when the soil layers of cuttings are upwards transferred, and the drill bit structure can drill deeper.

Preferably, the front ends of the left soil cutting blade and the right soil cutting blade are provided with grooves of 40-45 degrees.

Preferably, the length of the upper soil cutting blade is greater than that of the lower soil cutting blade, so that the drilled hole diameter is reduced from top to bottom, the use amount of mortar is reduced, and materials are saved.

Preferably, a first bending stirring knife is arranged on the first drill rod and located above the soil cutting blade, a second drill rod is sleeved on the outer side of the first drill rod, and a second bending stirring knife is arranged on the second drill rod.

Preferably, the first bending stirring knife and the second bending stirring knife each comprise a main arm, a connecting lug and a bending knife, one end of the main arm is connected with the first drill rod, one side of the end part of the other end of the main arm is provided with a notch, the connecting lug is arranged at the notch, and the bending knife is rotatably connected with the connecting lug through a connecting shaft so that the bending knife can rotatably extend and retract;

when the first drill rod and the second drill rod rotate forwards, the main arms of the first bending stirring knife and the second bending stirring knife and the bending knives are in a contraction state;

when the first drill rod and the second drill rod rotate reversely, the main arms of the first bending stirring knife and the second bending stirring knife and the bending knives are in a stretching state.

Preferably, the end face of the bottom end of the first drill rod is provided with an intermediate tooth, and the longitudinal section of the intermediate tooth is triangular.

The utility model discloses at least, include following beneficial effect:

one, the utility model discloses can creep into in hard soil layer to have the effect with hard soil layer smear metal and transmission upwards, solved the problem that conventional soil cement mixing pile driver is difficult to creep into in the higher soil layer of bearing capacity, accelerated construction speed, improved the construction work efficiency.

Two, the utility model discloses an automatic stirring blade of buckling has realized the construction of the diameter pile body that varies, has practiced thrift the material, improves the economic price/performance ratio of technology, to the foundation treatment area big, cement mixing pile tip need bore into the condition that the holding power layer is darker, the effect is showing.

Thirdly, the drill bit structure of the utility model is used as a novel nail type cement mixing pile drill bit, and the stress is clear; the stirring blade is automatically bent, so that the cement soil is effectively stirred; the long cutting teeth on the rod end effectively drill the bearing soil layer, and the integral stability of the drill bit structure in the drilling process is guaranteed.

Fourth, the utility model discloses a drill bit structure, simple structure, construction convenience is swift to become the stake outward appearance like the nail type, satisfy the needs of the different diameters of enlarged footing and pile body, reduced cement material and dropped into, reduction construction cost that can be by a relatively large margin.

Fifthly, the utility model discloses a drill bit structure can be used in land or on water, and cement mixing pile foundation treatment construction, adaptability is strong.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 illustrates a schematic view of the construction of a drill bit without a bending blade;

fig. 3 illustrates a schematic top view of a drill bit configuration.

1. A first drill rod; 2. a soil cutting blade; 3. a long cutting pick; 4. a main arm; 5. bending the blade; 6. connecting lugs; 7. a middle tooth; 8. a notch; 9. a second drill pipe.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

Examples

The utility model provides a novel drill bit structure of nail type soil cement mixing pile driver, it includes:

a first drill rod 1;

at least one pair of soil cutting blades 2, wherein the soil cutting blades 2 are obliquely arranged on the first drill rod 1;

and the long cutting pick 3 is arranged at the end part of the first drill rod 1 and is positioned at the lower end of the soil cutting blade 2.

The utility model discloses a set up long pick 3 and can make the stake end creep into in hard soil layer to through the hard soil layer of 2 cuttings of soil cutting blade and upwards transmit the soil layer.

In another solution, the soil cutting blade 2 makes an angle of 20-45 ° with the radial section of the first drill rod 1. In a preferred solution, the soil cutting blade 2 is angled at 30 ° to the radial section of the first drill rod 1, facilitating the upward transfer of cuttings and soil.

In another technical scheme, the soil cutting blades 2 are provided with 3 pairs, the soil cutting blades 2 at the upper end are perpendicular to the soil cutting blades 2 at the lower end, each pair of soil cutting blades 2 comprises a left soil cutting blade and a right soil cutting blade, and the left soil cutting blade 2 and the right soil cutting blade 2 are symmetrically arranged on two sides of the first drill rod 1. Set up soil cutting blade 2 to 3 pairs for when upwards transmitting the smear metal soil layer, have better continuity, can be better with the transmission of smear metal soil layer upwards, the drill bit structure can bore into more deeply.

In another technical scheme, grooves of 40-45 degrees are arranged at the front ends of the left soil cutting blade 2 and the right soil cutting blade 2. In a preferable scheme, the front ends of the left soil cutting blade 2 and the right soil cutting blade 2 are provided with 45-degree bevels.

In another technical scheme, the length of the upper soil cutting blade 2 is greater than that of the lower soil cutting blade 2, so that the drilled hole diameter is reduced from top to bottom, the use amount of mortar is reduced, and materials are saved.

In another technical scheme, a first bending stirring knife is arranged on the first drill rod 1 and is positioned above the soil cutting blade 2, a second drill rod 9 is sleeved on the outer side of the first drill rod 1, and a second bending stirring knife is arranged on the second drill rod 94.

In another technical scheme, each of the first bending stirring knife and the second bending stirring knife comprises a main arm 4, a connecting lug 6 and a bending knife, one end of the main arm 4 is connected with the first drill rod, one side of the end part of the other end of the main arm 4 is provided with a notch 8, the connecting lug 6 is arranged at the notch 8, and the bending knife is rotatably connected with the connecting lug 6 through a connecting shaft so that the bending knife can rotatably extend and retract;

when the first drill rod 1 and the second drill rod 9 rotate forwards, the main arms 4 of the first bending stirring knife and the second bending stirring knife and the bending knives are in a contraction state;

when the first drill rod 1 and the second drill rod 9 rotate reversely, the main arms 4 of the first bending stirring knife and the second bending stirring knife and the bending knife are both in a stretching state.

When the bending knife rotates forwards, the bending knife rotates to be in a shrinkage state due to the fact that no obstacle exists in the gap under the blocking effect of the soil body; when the main arm rotates reversely, the bending knife cannot rotate further under the blocking action of the main arm at the notch 8 and is in a stretching state.

In another technical scheme, an intermediate tooth 7 is arranged on the end face of the bottom end of the first drill rod, and the longitudinal section of the intermediate tooth 7 is triangular.

The utility model discloses a use method of drill bit structure includes following step:

firstly, measuring and setting out, and determining a pile position of a pile foundation according to the field condition and the design requirement;

secondly, positioning a drilling machine, and adjusting the verticality of a drill rod;

thirdly, spraying slurry and sinking, wherein the first bending stirring knife and the second bending stirring knife rotate forward and backward to cut and stir the soil body at the same time until the designed depth of the enlarged head is reached, and at the moment, the bending blades 5 on the first bending stirring knife and the second bending stirring knife are unfolded;

fourthly, changing the rotating directions of the first drill rod 1 and the second drill rod 9, and shrinking the bending blade 5 to the diameter of the lower pile body; the guniting soil cutting sinks until the designed depth, and at the moment, the bent blade 5 is folded flat due to the obstruction of the soil body;

lifting and stirring, lifting a drill rod, closing a slurry feeding pump, and simultaneously stirring cement soil in a forward and reverse direction by using a first bending stirring knife and a second bending stirring knife until the bottom surface elevation of the enlarged head is reached;

sixthly, changing the rotating directions of the first drill rod 1 and the second drill rod 9, and extending the first bending stirring knife and the second bending stirring knife to enlarge the head diameter; lifting the drill rod, and stirring the cement soil until the elevation of the designed pile top is 50cm above;

seventhly, cutting soil and sinking, starting a slurry feeding pump, spraying cement slurry to a soil body, and positively and negatively stirring the cement soil by using a first bending stirring knife and a second bending stirring knife until the designed depth of the expansion head is reached;

and step eight, lifting and stirring, closing the slurry feeding pump, and simultaneously positively and negatively stirring the cement soil by the first bending stirring knife and the second bending stirring knife until the height of the pile top is 50cm above the designed elevation, so that pile foundation construction is completed.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (8)

1. The utility model provides a novel drill bit structure of nail type soil cement mixing pile driver which characterized in that includes:

a first drill rod;

at least one pair of soil cutting blades obliquely arranged on the first drill rod;

and the long cutting pick is arranged at the end part of the first drill rod and is positioned at the lower end of the soil cutting blade.

2. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 1, wherein the soil cutting blade is at an angle of 20-45 ° with respect to a radial section of the first drill rod.

3. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 1, wherein the soil cutting blades are provided in 3 pairs, the soil cutting blades at the upper end are perpendicular to the soil cutting blades at the lower end, each pair of soil cutting blades comprises a left soil cutting blade and a right soil cutting blade, and the left soil cutting blade and the right soil cutting blade are symmetrically arranged at two sides of the first drill rod.

4. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 3, wherein the front ends of the left soil cutting blade and the right soil cutting blade are provided with 40-45 ° bevels.

5. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 1, wherein the length of the upper end soil cutting blade is greater than that of the lower end soil cutting blade.

6. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 1, wherein a first bending mixing knife is arranged on the first drill rod, the first bending mixing knife is positioned above the soil cutting blade, a second drill rod is sleeved on the outer side of the first drill rod, and a second bending mixing knife is arranged on the second drill rod.

7. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 6, wherein the first bending mixing cutter and the second bending mixing cutter each comprise a main arm, a connecting lug and a bending cutter, one end of the main arm is connected with the first drill rod, one side of the end part of the other end of the main arm is provided with a notch, the connecting lug is arranged at the notch, and the bending cutter is rotatably connected with the connecting lug through a connecting shaft so as to rotatably extend and retract the bending cutter;

when the first drill rod and the second drill rod rotate forwards, the main arms of the first bending stirring knife and the second bending stirring knife and the bending knives are in a contraction state;

when the first drill rod and the second drill rod rotate reversely, the main arms of the first bending stirring knife and the second bending stirring knife and the bending knives are in a stretching state.

8. The novel drill bit structure of the nail type cement mixing pile driver as claimed in claim 1, wherein the end face of the bottom end of the first drill rod is provided with a middle tooth, and the longitudinal section of the middle tooth is triangular.

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