CN218757454U

CN218757454U - Guiding positioner with soil blocking function for long spiral drilling cast-in-place pile

Info

Publication number: CN218757454U
Application number: CN202223138863.4U
Authority: CN
Inventors: 傅贵华; 陈富磊; 周坤
Original assignee: MCC Tiangong Group Corp Ltd
Current assignee: MCC Tiangong Group Corp Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-03-28
Anticipated expiration: 2032-11-25

Abstract

The utility model provides a long spiral drilling bored concrete pile is with direction locator of taking fender soil function, include: the central pile casing is vertically arranged, part of the central pile casing is inserted into a soil layer, a long spiral drill rod vertically penetrates through the central pile casing, and the inner diameter of the central pile casing is uniform and not smaller than the pile diameter; one end of the fixing part is fixed on the side wall of the central casing, and the end part, far away from the central casing, of the fixing part extends in the vertical downward direction and is inserted into a soil layer. The utility model provides a center protects a section of thick bamboo and can carry on spacingly to long auger stem, with the positional deviation control in the construction quality standard requirement in stake hole, still can prevent to be taken out of the soil in stake hole by long auger stem and fall into the stake hole again, and then influences the local stake footpath and the intensity of bored concrete pile.

Description

Guiding positioner with soil blocking function for long spiral drilling cast-in-place pile

Technical Field

The utility model belongs to the technical field of the building engineering construction technique and specifically relates to a guiding orientation ware that long spiral drilling bored concrete pile was with taking fender soil function is related to.

Background

The long spiral cast-in-place pile technology is a new type of pile foundation construction method. The long spiral cast-in-place pile is a pile body formed by adopting a special long spiral drilling machine to drill to a preset depth, continuously pumping superfluid concrete into a hole through a drill bit valve until the pile top is reached, and then inserting a reinforcement cage.

The pile diameter of the existing long spiral drilling bored concrete pile is generally 300 mm-800 mm, the pile diameter is smaller, pile position deviation is easy to occur due to inaccurate positioning in the drilling process of a long spiral drilling machine, even if the positioning is accurate during drilling, deviation is easy to occur when the lower part of a drill rod meets stratum changes in the construction process, and finally hole-forming pile position deviation is caused. Too big pile position deviation can lead to building foundation structure's atress form to change, becomes eccentric pressurized by axle center pressurized, and the normal stress reduces, and the shear stress grow, greatly reduced building foundation structure's bearing capacity influences the life of engineering, the incident appears even, and pile position deviation handles complicacy moreover, can increase bored concrete pile cost expense, reduces the efficiency of construction. Therefore, during construction, the pile position deviation amount of the long spiral bored pile must be strictly controlled according to the requirements of 'construction quality acceptance standard specification for building foundation engineering' GB 50202.

Besides the pile position, the construction method also strictly monitors the projects such as the pile diameter and the strength of the cast-in-place pile, which influence the quality and the service life of the building engineering. During construction, the long spiral drill rod brings out lower soil slag in the drill lifting process, the soil slag can be accumulated beside the hole, and if the soil slag falls into the pile hole again, the quality problems of diameter shrinkage of the local position of the pile hole, slag inclusion after concrete pouring and the like are easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough that above-mentioned background art exists, provide a long spiral drilling bored concrete pile with taking guiding orientation ware that keeps off native function.

The utility model adopts the technical proposal that: a guiding orientation ware of long auger drilling bored concrete pile with fender soil function includes:

the central pile casing is vertically arranged, part of the central pile casing is inserted into a soil layer, a long spiral drill rod vertically penetrates through the central pile casing, and the inner diameter of the central pile casing is uniform and not smaller than the diameter of a pile;

and one end of the fixing part is fixed on the side wall of the central casing, and the end part of the fixing part, which is far away from the central casing, extends along the vertical downward direction and is inserted into a soil layer.

Specifically, the difference between the inner diameter of the central casing and the pile diameter is not more than 140mm.

Specifically, the outer diameter of the central casing gradually decreases from the top end to the bottom end.

Specifically, the outer wall of the central protective cylinder is provided with at least three mounting grooves, and the inner bottom surfaces of the mounting grooves are horizontal and at the same height.

Specifically, each mounting groove is provided with a level gauge.

Specifically, the fixed part includes at least three groups of connecting rods and awl pole, the both ends of connecting rod are connected respectively the center protects a section of thick bamboo with the awl pole, the pointed end of awl pole is kept away from the connecting rod.

Specifically, the connecting rods are horizontally arranged and are uniformly distributed along the circumferential direction of the central pile casing.

Specifically, the distance between the connecting point of the connecting rod and the central casing and the top end of the central casing is not less than 500mm, and the distance between the connecting point and the bottom end of the central casing is not less than 1000mm.

The utility model has the advantages that: the side wall of the central pile casing can limit the long spiral drill rod, and the position deviation of a pile hole can be controlled within the requirements of construction quality standards; the exposed part of the central pile casing is higher than the surface of a soil layer, soil brought out when the long auger stem drills and lifts off the drill after the drill is stopped passes through the top end of the central pile casing and falls onto the surface of the soil layer on the outer side of the central pile casing, the soil on the outer side of the central pile casing is cleaned in time, and the soil brought out of a pile hole by the long auger stem can be prevented from falling into the pile hole again so as to influence the local pile diameter and the strength of a cast-in-place pile.

Drawings

Fig. 1 is a top view of an embodiment of the present invention;

fig. 2 is a front view of an embodiment of the present invention;

fig. 3 is a front cross-sectional view of an embodiment of the present invention.

In the figure:

10. a central protective cylinder; 11. mounting grooves; 12. a level gauge;

20. a fixed part; 21. a connecting rod; 22. a taper rod.

Detailed Description

The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Referring to fig. 1-2, a guiding locator with earth retaining function for a long screw bored pile includes: a center casing 10 and a fixing portion 20.

The central pile casing 10 is vertically arranged and partially inserted into a soil layer for a long spiral drill rod to vertically pass through, and the inner diameter of the central pile casing 10 is uniform and not smaller than the pile diameter; one end of the fixing part 20 is fixed on the side wall of the central casing 10, and the end of the fixing part 20 far away from the central casing 10 extends in the vertical downward direction and is inserted into the soil layer. The length of the long spiral drill rod for construction reaches dozens of meters, and the height of the central casing 10 is far smaller than that of the long spiral drill rod, so that the accuracy of the installation position of the central casing 10 is easy to control, the center of the central casing 10 is overlapped with the center of a pile position during installation, and the fixing part 20 is hammered to drive the central casing 10 to move downwards to be inserted into a soil layer. After the long spiral drill pipe is installed, the long spiral drill pipe vertically penetrates through the central pile casing 10 to drill a soil layer, the side wall of the central pile casing 10 can limit the long spiral drill pipe, and the position deviation of a pile hole can be controlled within the requirements of construction quality standards. In addition, the central pile casing 10 is only partially inserted into the soil layer, the exposed part of the central pile casing is higher than the surface of the soil layer, soil brought out when the long auger stem drills and is lifted after the drill is stopped passes over the top end of the central pile casing 10 and falls onto the surface of the soil layer on the outer side of the central pile casing 10, and is cleaned in time by constructors, and as long as the soil on the outer side of the central pile casing 10 is not higher than the top end of the central pile casing 10, the soil brought out of the pile hole by the long auger stem cannot fall into the pile hole again, so that the local pile diameter and the strength of the cast-in-place pile are influenced.

The part of the inner diameter of the central pile casing 10 exceeding the pile diameter is the pile position deviation amount allowed by the construction quality standard, and the pile position allowable deviation of the cast-in-place piles (1-3 side piles with a single-row foundation perpendicular to the center line direction and a pile group foundation) is 70mm according to the requirements of 'construction quality acceptance standard specification for foundation engineering of building foundation' GB50202, so in the embodiment, the difference value between the inner diameter of the central pile casing 10 and the pile diameter should not be more than 140mm.

Referring to fig. 3, the outer diameter of the central casing 10 is gradually reduced from the top end to the bottom end, and this shape facilitates the insertion of the central casing 10 into the ground and downward extension.

In practice, it should be ensured that the central casing 10 is in a vertical state, and a common monitoring method is to measure whether the heights of all points at the top end of the central casing 10 are the same, but this method is cumbersome to operate and is not convenient for real-time monitoring, so in some feasible embodiments, at least three mounting grooves 11 are provided on the outer wall of the central casing 10, the inner bottom surfaces of the mounting grooves 11 are horizontal and at the same height, and a level 12 is provided in each mounting groove 11. Whether the central casing 10 is installed vertically can be judged by observing whether the bubble in the level gauge 12 is centered, and whether the central casing 10 is inclined or not caused by collision of other equipment can be monitored in real time.

Referring to fig. 2, the fixing portion 20 includes at least three sets of connecting rods 21 and conical rods 22, two ends of each connecting rod 21 are respectively connected to the central casing 10 and the conical rod 22, and a tip of the conical rod 22 is far away from the connecting rod 21. The blunt tip of taper rod 22 faces upwards, can regard as the hammering point, and it drives central casing 10 downstream through connecting rod 21 when receiving the hammering, avoids directly hammering central casing 10 and leads to its damage or warp and lose limit function. In addition, the tip of the conical rod 22 is more likely to enter the soil layer downward.

The human cost need be considered during actual construction, can save the required power of hammering awl pole 22 with connecting rod 21 level setting, in addition, suitably reduces the quantity of connecting rod 21 and awl pole 22 and also can reduce constructor's demand volume. When the number of the connecting rods 21 and the number of the taper rods 22 are less, the connecting rods 21 should be uniformly distributed along the circumferential direction of the central casing 10, so as to prevent the side wall of the central casing 10 from being skewed due to uneven stress.

In some preferred embodiments, the distance between the connecting rod 21 and the central casing 10 and the top of the central casing 10 is not less than 500mm, so as to ensure that the constructor has enough time to clean the soil outside the central casing 10 and prevent the soil from accumulating too fast to exceed the top of the central casing 10 and then falling back to the pile hole. The distance between the connecting point and the bottom end of the central casing 10 is not less than 1000mm, because the length of the long spiral drill rod is generally longer, and the limiting effect of the long spiral drill rod on the long spiral drill rod can be enhanced by increasing the length of the central casing 10 inserted into the soil layer.

Example 1:

a guiding orientation ware of long auger drilling bored concrete pile with fender soil function includes: a center casing 10 and a fixing portion 20. The central pile casing 10 is vertically arranged and partially inserted into a soil layer for a long spiral drill rod to vertically pass through; the height of the central protective cylinder is 1500mm; the inner diameter of the central pile casing 10 is uniform and is 120mm larger than the pile diameter; the outer diameter of the central casing 10 gradually decreases from the top end to the bottom end; the outer wall of the central pile casing 10 is provided with three mounting grooves 11, the inner bottom surfaces of the mounting grooves 11 are horizontal and at the same height, and each mounting groove 11 is internally provided with a level 12.

The fixing portion 20 includes three sets of connecting rods 21 and conical rods 22, and the three sets of connecting rods 21 and conical rods 22 are uniformly arranged along the circumferential direction of the central casing 10. One end of the connecting rod 21 is connected with the side wall of the central casing 10, and the distance between the connecting point of the connecting rod and the side wall and the top end of the central casing 10 is 500mm; the other end of the connecting rod 21 is connected with a conical rod 22, and the tip end of the conical rod 22 is far away from the connecting rod 21.

The utility model provides a lateral wall that a section of thick bamboo 10 was protected at center can carry on spacingly to long auger stem, can be with the positional deviation control in the construction quality standard requirement in stake hole, the center protects a section of thick bamboo 10 expose the part and be higher than the soil layer surface, the top that a section of thick bamboo 10 was protected at the center is crossed to the soil that takes out when long auger stem drilling and drill stopping back lifting, fall to the soil layer surface in the center protects a section of thick bamboo 10 outside, in time clear up the soil in the center protects a 10 outside, can prevent to be taken out the soil in stake hole by long auger stem and fall into the stake hole again, and then influence the local stake footpath and the intensity of bored concrete pile.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A guiding positioner with a soil blocking function for a long spiral bored pile is characterized by comprising: the central pile casing is vertically arranged, part of the central pile casing is inserted into a soil layer, a long spiral drill rod vertically penetrates through the central pile casing, and the inner diameter of the central pile casing is uniform and not smaller than the pile diameter;

2. A guide locator with an earth retaining function for a long auger bored pile according to claim 1, wherein the difference between the inside diameter of the center casing and the pile diameter is not more than 140mm.

3. A guide locator with an earth retaining function for a long auger bored pile according to claim 1, wherein an outer diameter of the central casing is gradually reduced from a top end to a bottom end.

4. A guide locator with a soil blocking function for a long auger hole filling pile according to claim 1, wherein at least three mounting grooves are formed in the outer wall of the central casing, and the inner bottom surfaces of the mounting grooves are horizontal and at the same height.

5. A guide locator with a soil retaining function for a long auger bored pile according to claim 4, wherein a level is provided in each of the mounting grooves.

6. A guide locator with a soil retaining function for a long auger hole filling pile according to claim 1, wherein the fixing portion comprises at least three sets of connecting rods and a tapered rod, two ends of each connecting rod are respectively connected with the central casing and the tapered rod, and a tip of the tapered rod is far away from the connecting rods.

7. A guide locator with an earth retaining function for a long auger bored pile according to claim 6, wherein the connecting rod is horizontally disposed and a plurality of the connecting rods are uniformly distributed in the circumferential direction of the central casing.

8. A guide locator with a soil retaining function for a long auger hole filling pile according to claim 6, wherein a distance between a connection point of the connecting rod and the central casing and a top end of the central casing is not less than 500mm, and a distance between the connection point and a bottom end of the central casing is not less than 1000mm.