CN211081737U

CN211081737U - Drilling bored concrete pile of reducing soil body mud skin thickness around stake is along with boring device

Info

Publication number: CN211081737U
Application number: CN201921392274.4U
Authority: CN
Inventors: 张自光; 崔健; 沈维成; 徐磊; 危明; 丁韬; 杨明
Original assignee: Anhui Jianzhu University; Anhui Road and Bridge Engineering Co Ltd
Current assignee: Anhui Jianzhu University; Anhui Road and Bridge Engineering Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-07-24
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a reduce bored concrete pile of all soil body mud crust thickness of stake along with boring device, including the all soil body of stake, there is the stake hole inside of the all soil body of stake, there is the crust internal surface a week in stake hole, the inside central point that the drilling rod is in the stake hole puts, the lower extreme of drilling rod is connected with connecting portion, the side of drilling rod is close the position symmetry of connecting portion and is provided with two sets of staple bolts, all install four auricles of group on two sets of staple bolts, the auricle utilizes No. two bolt fastening. A reduce bored concrete pile of all soil body mud skin thickness of stake along with boring device, through go into three group's mud skin scrapers at the drilling rod facial make-up, can be nimble and quick scraping the mud skin, be convenient for use in the bored concrete pile of the different degree of depth, improve work efficiency greatly, and for mechanized operation, labour saving and time saving does not need the intervention of other devices, reduce cost is suitable for different working conditions, brings better use prospect.

Description

Drilling bored concrete pile of reducing soil body mud skin thickness around stake is along with boring device

Technical Field

The utility model relates to a bored concrete pile construction equipment field, in particular to reduce bored concrete pile along with boring device of all soil body mud skin thickness of stake.

Background

With the development of pile foundations, the cast-in-situ bored pile adopting the mud wall protection process is widely applied. In the construction process of the cast-in-situ bored pile, a layer of mud skin with the thickness of several millimeters to dozens of millimeters is formed around the pile due to different mud circulation times. The mud-skin soil property of the wall protection mud of the cast-in-situ bored pile is different from the original mud and the soil between the piles. Compared with the original slurry, the clay has poor property grading, large pore ratio, poor compactness, high compressibility, low strength and poor stability. Compared with the soil between piles, the clay soil has the advantages of high water content, large pore ratio, high compressibility, low shear strength, easy softening, low friction and poor stability. The existence of mud skin has changed the interact between the stake soil, has influenced the direct bonding of concrete and stake side soil, leads to stake side frictional resistance to reduce, and then influences the bearing characteristic of single pile. Research results at home and abroad show that the friction resistance of the side of the pile with the larger mud skin thickness is reduced by nearly 40 percent compared with the pile with the thinner mud skin; laboratory model test research results show that the pile side limit frictional resistance of the large-diameter ultra-long single pile of the deep soft soil foundation is reduced by 15-35% due to the existence of mud skin, and the limit bearing capacity of the single pile is reduced by about 20%; the finite element numerical calculation result shows that the ultimate bearing capacity of the single pile is respectively reduced by 48%, 56%, 59% and 63% compared with that of a normal pile when the thickness of the mud skin is 10 mm, 20 mm, 30 mm and 50 mm. With regard to the measure of reducing the thickness of the mud skin in the construction of the cast-in-situ bored pile, experts and scholars at home and abroad mainly carry out deep research on the aspects of improving the performance of the mud, improving the construction process and the like. Generally speaking, reverse circulation drilling is more beneficial to reducing the thickness of the mud skin than forward circulation drilling, pile forming time is reduced, and the thickness of the mud skin is reduced. However, there is a report on a device capable of effectively reducing the thickness of the mud skin at home and abroad at present, and in order to solve the problems at present, a cast-in-situ bored pile device capable of reducing the thickness of the mud skin of the retaining wall mud is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reduce bored concrete pile along with boring device of all soil body mud skin thickness of stake can effectively solve the problem among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

A cast-in-situ bored pile while drilling device for reducing the thickness of mud and mud skins of a soil body around a pile comprises a soil body around the pile, a pile hole is formed in the soil body around the pile, mud skins are formed on the periphery of the inner surface of the pile hole, a drill rod is located in the center of the inner portion of the pile hole, the lower end of the drill rod is connected with a connecting portion, two groups of hoops are symmetrically arranged on the side face of the drill rod close to the connecting portion, four groups of lugs are mounted on the two groups of hoops, the lugs are fixed through a second bolt, a plurality of groups of first through holes are formed in the periphery of the upper end portion and the lower end portion of the hoops, three groups of tool holders are symmetrically and movably mounted in the groove face of the outer side of the hoops, four groups of first thread grooves are formed in the upper;

The manganese steel soil scraper comprises an adjusting part, a cutter point, a second perforation and scale marks, wherein the adjusting part is positioned in the cutter groove and extends outwards, the cutter point is arranged at the outermost side of the manganese steel soil scraper, the scale marks are arranged at the upper end part of the manganese steel soil scraper, three groups of the second perforation are equidistantly arranged on one end part of the manganese steel soil scraper far away from the cutter point, three groups of strip-shaped adjusting grooves are equidistantly arranged on the back surface of the cutter seat from top to bottom, steps are arranged at the notch of each strip-shaped adjusting groove, a stud sequentially penetrates through the second perforation and the strip-shaped adjusting groove, a first gland nut acting on the second perforation is sleeved on the stud, a second gland nut acting on the strip-shaped adjusting groove is further sleeved on the stud, and a second thread groove is arranged at the position, close to the outer side, of the upper end surface of the cutter seat, a third bolt is screwed in the second thread groove, and the lower end of the third bolt extrudes the upper end face of the manganese steel scraper.

Preferably, the drill rod is mounted on the rotary drilling rig and is fixedly connected with the drill bit through the connecting part.

Preferably, the two groups of hoops can be combined into a pair, a hexagonal nut is sleeved on the second bolt of the lug piece to achieve the fastening purpose, and the radian of the side face of the cutter holder is consistent with that of the outer side face of the hoop.

Preferably, the size of the cutter groove is matched with that of the manganese steel scraper, the manganese steel scraper is made of high manganese steel alloy with the manganese content of more than 13%, the width of the manganese steel scraper is controlled within the range of 1-1.2 m, the position of the cutter point slightly inclines to one side, the distance can be calculated by contrasting the scale marks, and the thickness of the mud skin needing to be scraped is determined.

Preferably, No. two perforation and stud's diameter are identical, stud can be at bar adjustment tank internal lateral shifting, gland nut and No. two gland nut's medial surface all is provided with the binding face of enlarging area, and it has the friction line to distribute on the binding face, No. two gland nut's binding face hugs closely the step.

The utility model discloses an improve and provide a drilling bored concrete pile of reducing pile soil body mud skin thickness here and follow drilling device, compare with prior art, have as follows showing improvement and advantage:

(1) Through pack into three group's mud skin scrapers on the drilling rod, can be nimble and quick scrape the mud skin, be convenient for use in the drilling bored concrete pile of the different degree of depth, improve work efficiency greatly, and for mechanized operation, labour saving and time saving does not need the intervention of other devices, reduce cost.

(2) The manganese steel scraper is made of high manganese steel alloy with the manganese content of more than 13%, is hard, high in toughness and durable and wear-resistant, is suitable for reducing the thickness of mud and mud skin of soil body around a bored pile, avoids the situation that a blade is damaged and difficult to replace in time in a pile groove, is used for cutting and dividing mud, has a scale mark for observing and adjusting the thickness of the blade, and is reasonable in design and convenient to use.

(3) Be provided with the bar groove that is used for adjusting blade extension length on the blade holder, length adjustment when making things convenient for the blade to use, the single-end bolt at two sets of gland nuts cooperation tops can be followed the not equidirectional firm blade of fixing in the sword inslot simultaneously, and is fixed effectual, prevents that the blade during operation is not hard up.

(4) Staple bolt, blade holder and blade all can be installed fast and dismantle fast, and convenient the change, and can avoid the interference when drilling the drill bit.

(5) Whole device is simple, convenient operation, and economical and practical improves work efficiency, and the effect of use is better for traditional mode.

Drawings

FIG. 1 is a schematic view of the overall structure of a cast-in-situ bored pile device for reducing the thickness of mud and mud skin around the pile according to the present invention;

FIG. 2 is an overall connection view of a drill rod and a tool apron of the drilling and grouting pile device for reducing the thickness of mud and mud skin of soil mass around the pile;

FIG. 3 is a detailed structure diagram of the manganese steel scraper of the drilling device for the bored pile for reducing the thickness of mud and mud skin of the soil around the pile;

FIG. 4 is a back view of the tool apron of the drilling and grouting device for reducing the thickness of mud and crust of soil around the pile;

Figure 5 is the utility model relates to a reduce drilling bored concrete pile of all soil body mud crust thickness along with boring the mounted position picture of device blade holder.

In the figure: 1. a pile-surrounding soil body; 2. pile holes; 3. mud skin; 4. a drill stem; 5. a connecting portion; 6. hooping; 7. a tab; 8. a second bolt; 9. punching a hole I; 10. a tool apron; 11. a first thread groove; 12. a cutter groove; 13. manganese steel scraper; 131. an adjustment section; 132. a knife tip; 133. punching a hole II; 134. scale lines; 14. a strip-shaped adjusting groove; 15. a step; 16. a stud bolt; 17. a first compression nut; 18. a second compression nut; 19. a second thread groove; 20. a third bolt; 21. a rotary drilling rig; 22. a first bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-5, a bored pile while-drilling device for reducing the thickness of mud and mud skin of a soil body around a pile comprises a soil body 1 around the pile, a pile hole 2 is formed in the soil body 1 around the pile, mud skin 3 is formed on the inner surface of the pile hole 2 around the pile hole, a drill rod 4 is positioned in the center of the inner part of the pile hole 2, a connecting part 5 is connected to the lower end of the drill rod 4, two groups of hoops 6 are symmetrically arranged on the side surface of the drill rod 4 close to the connecting part 5, four groups of lugs 7 are arranged on the two groups of hoops 6, the lugs 7 are fixed by using a second bolt 8, a plurality of groups of first through holes 9 are arranged around the upper end and lower end of the hoop 6, three groups of tool holders 10 are symmetrically and movably arranged in the outer side groove surface of the hoop 6, four groups of first thread grooves 11 are arranged in the upper and lower end;

The inside of the tool apron 10 is provided with a tool groove 12, a manganese steel scraper 13 is transversely and movably installed in the tool groove 12, the manganese steel scraper 13 comprises an adjusting part 131, a tool tip 132, a second perforation 133 and scale marks 134, the adjusting part 131 is positioned in the tool groove 12 and extends outwards, the tool tip 132 is arranged at the outermost side of the manganese steel scraper 13, the scale marks 134 are arranged at the upper end part of the manganese steel scraper 13, three groups of the second perforation 133 are equidistantly arranged at one end part of the manganese steel scraper 13 far away from the tool tip 132, three groups of strip-shaped adjusting grooves 14 are equidistantly arranged on the back surface of the tool apron 10 from top to bottom, steps 15 are arranged at the notch parts of the strip-shaped adjusting grooves 14, a stud 16 sequentially penetrates through the second perforation 133 and the strip-shaped adjusting grooves 14, a first gland nut 17 acting on the second perforation 133 is sleeved on the stud 16, a second gland nut 18 acting on the strip-shaped adjusting grooves 14 is sleeved on the stud 16, a second threaded groove 19 penetrates through the position, close to the outer side, of the upper end surface of the cutter holder 10, a third bolt 20 is screwed in the second threaded groove 19, and the lower end of the third bolt 20 extrudes the upper end surface of the manganese steel scraper 13;

The drill rod 4 is arranged on the rotary drilling rig 21, and the drill rod 4 is fixedly connected with a drill bit through the connecting part 5; the two groups of hoops 6 can be combined into a pair, and a hexagon nut is sleeved on the second bolt 8 of the lug 7 to achieve the fastening purpose, and the radian of the side surface of the cutter holder 10 is consistent with that of the outer side surface of the hoop 6; the size of the cutter groove 12 is matched with that of the manganese steel scraper 13, the manganese steel scraper 13 is made of high manganese steel alloy with the manganese content of more than 13%, the width of the manganese steel scraper 13 is controlled within the range of 1-1.2 m, the position of the cutter point 132 is slightly inclined towards one side, the distance can be calculated by contrasting with the scale mark 134, and the thickness of the mud skin 3 to be scraped is determined; no. two perforation 133 is identical with stud 16's diameter, and stud 16 can be in bar adjustment tank 14 lateral shifting, and a gland nut 17 and No. two gland nut 18's medial surface all is provided with the binding face of enlarging area, and it has the friction line to distribute on the binding face, and step 15 is hugged closely to No. two gland nut 18's binding face, improves the effect of screwing firmly.

It should be noted that, the utility model relates to a drilling bored concrete pile while drilling device for reducing the thickness of mud and mud skin of soil body around the pile, when in use, firstly, the drill bit on the drill stem 4 is taken off, then two groups of anchor ears 6 are combined, and the ear sheets 7 on each position are fixed by the second bolt 8, so that the whole anchor ear structure is firmly fixed on the drill stem 4, then three groups of cutter seats 10 are symmetrically clamped into the groove on the outer side surface of the anchor ear 6, and are respectively fixed by inserting the first bolts 22 into the first thread grooves 11, at this time, three groups of manganese steel earth scraping knives 13 are respectively arranged in the cutter grooves 12 of the cutter seats 10, the distance is calculated by contrasting the scale mark 134, the thickness of the mud skin 3 to be scraped is determined, then three groups of stud bolts 16 are respectively inserted into the second perforation 133 and the bar-shaped adjusting grooves 14, the bar-shaped adjusting grooves 14 can transversely move according to the required length, then the first gland nut 17 and the second gland nut 18 are respectively used, after locking, screwing a third bolt 20 into a second thread groove 19, extruding the upper end face of the manganese steel scraper 13, reinforcing, hoisting the drill rod 4 by the rotary drilling rig 21 to enter the pile hole 2, cutting the tool nose 132 of the manganese steel scraper 13 into the mud skin 3 of the soil body 1 around the pile, driving the drill rod 4 to rotate by the rotary drilling rig 21 from the position, scraping off the mud skin 3 with a certain thickness by using the tool nose 132, scraping off all the mud skins 3 under the condition of rotating for two circles, then continuously driving the drill rod 4 to descend in the pile groove, and scraping off the mud skin 3 at the lower layer; when the manganese steel scraper 13 is not needed, the scraper is disassembled, and the cutter holder 10 and the hoop 6 are sequentially disassembled, so that the manganese steel scraper is practical.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cut down bored concrete pile of all soil body mud crust thickness along with boring device, includes all soil bodies (1), its characterized in that: a pile hole (2) is arranged in the pile surrounding soil body (1), a mud skin (3) is arranged on the inner surface of the pile hole (2) in a circle, a drill rod (4) is positioned in the center of the pile hole (2), the lower end of the drill rod (4) is connected with a connecting part (5), two groups of hoops (6) are symmetrically arranged at the side surface of the drill rod (4) close to the connecting part (5), four groups of lugs (7) are arranged on the two groups of hoops (6), the lugs (7) are fixed by a second bolt (8), a plurality of groups of first through holes (9) are formed in the upper end part and the lower end part of the hoop (6) in one circle, three groups of tool holders (10) are symmetrically and movably arranged in the groove surface at the outer side of the hoop (6), four groups of first thread grooves (11) are formed in the upper end face and the lower end face of the cutter holder (10), and a first bolt (22) penetrates through the first through hole (9) and is screwed with the first thread grooves (11);

The manganese steel soil scraper is characterized in that a cutter groove (12) is formed in the cutter holder (10), a manganese steel soil scraper (13) is transversely and movably mounted in the cutter groove (12), the manganese steel soil scraper (13) comprises an adjusting part (131), a cutter point (132), a second through hole (133) and scale marks (134), the adjusting part (131) is located in the cutter groove (12) and extends outwards, the cutter point (132) is arranged on the outermost side of the manganese steel soil scraper (13), the scale marks (134) are arranged at the upper end part of the manganese steel soil scraper (13), the second through hole (133) is formed in three groups of equal distances on the manganese steel soil scraper (13) at one end part far away from the cutter point (132), three groups of strip-shaped adjusting grooves (14) are formed in the back surface of the cutter holder (10) from top to bottom at equal distances, steps (15) are arranged at the notch of each strip-shaped adjusting groove (14), and a double-headed bolt (16) sequentially penetrates through the second through hole (133) and, the utility model discloses a No. two bolt hole (133) are equipped with in stud (16) and are used for a compression nut (17) of No. two perforation (133) departments, still cup joint No. two compression nut (18) that are used for bar adjustment tank (14) on stud (16), the position that the up end of blade holder (10) is close to the outside runs through and has seted up No. two thread groove (19), No. two thread groove (19) interior No. three inherent bolt (20) of twisting and the up end of No. three bolt (20) extrusion manganese steel scraper (13).

2. The cast-in-situ bored pile while-drilling device for reducing the thickness of mud and mud skins of soil bodies around a pile according to claim 1, wherein: the drill rod (4) is arranged on a drilling machine (21), the drilling machine (21) is connected with a crane, and the drill rod (4) is fixedly connected with a drill bit through a connecting part (5).

3. The cast-in-situ bored pile while-drilling device for reducing the thickness of mud and mud skins of soil bodies around a pile according to claim 1, wherein: the two groups of anchor ears (6) can be combined into a pair, and a hexagon nut is sleeved on a second bolt (8) of the ear piece (7) to achieve the fastening purpose, and the radian of the side surface of the tool apron (10) is consistent with that of the outer side surface of the anchor ear (6).

4. The cast-in-situ bored pile while-drilling device for reducing the thickness of mud and mud skins of soil bodies around a pile according to claim 1, wherein: the size of the cutter groove (12) is matched with that of the manganese steel scraper (13), the manganese steel scraper (13) is made of high manganese steel alloy with the manganese content of more than 13%, the width of the manganese steel scraper (13) is controlled within the range of 1-1.2 m, the position of the cutter point (132) is slightly inclined towards one side, the scale mark (134) can be contrasted, the distance is calculated, and the thickness of the mud skin (3) needing to be scraped is determined.

5. The cast-in-situ bored pile while-drilling device for reducing the thickness of mud and mud skins of soil bodies around a pile according to claim 1, wherein: no. two perforation (133) are identical with the diameter of stud (16), stud (16) can be in bar adjustment tank (14) lateral shifting, the medial surface of gland nut (17) and No. two gland nut (18) all is provided with the binding face of enlarging area, and it has the friction line to distribute on the binding face, step (15) are hugged closely to the binding face of No. two gland nut (18).