CN218813700U - Drilled pile structure capable of quickly stripping pile head - Google Patents

Abstract

The utility model relates to a can peel off bored pile structure of pile head fast, including the concrete pile with be located the inside steel reinforcement cage of concrete pile, the concrete pile includes pile body section and the pile head section of treating the excision, the end of every longitudinal reinforcement of steel reinforcement cage is equipped with the plastic sleeve pipe, the plastic sleeve pipe is used for the interval the concrete of pile head section with the longitudinal reinforcement, the end of longitudinal reinforcement is passed pile body section extends to in the pile head section. The drilled pile structure of the utility model has the advantages that the plastic sleeve is sleeved on the longitudinal steel bar in the pile head section to be cut off, the longitudinal steel bar is not bonded with the concrete of the pile head section, the steps of crushing the concrete and stripping the steel bar in the prior guiding step can be omitted, and a large amount of working hours are saved; and can avoid because of peeling off the reinforcing bar, the process that leads to the pneumatic pick to break the concrete is bent the reinforcing bar, hangs out pile head section back, and every reinforcing bar is all indeformable to save the step of alignment reinforcing bar, further save man-hour, greatly improved the efficiency of construction.

Description

Drilled pile structure capable of quickly stripping pile head

Technical Field

The utility model relates to a construction field, specific theory relates to a can peel off bored pile structure of pile head fast.

Background

The cast-in-place concrete pile is a pile manufactured by placing a drilling machine in place, embedding a pile casing, protecting a wall with slurry, forming a hole, cleaning the hole, hoisting a reinforcement cage and pouring concrete, and a cast-in-place concrete pile (i.e. a drilled pile) is commonly used. The bored pile is a pile formed by forming a pile hole in foundation soil by means of mechanical drilling and the like, placing a reinforcement cage in the pile hole, and finally pouring concrete, and is used as a foundation pile for construction.

And after the pouring is finished and the foundation pit is excavated, the pile head part is exposed out of the ground. Because the concrete of the pile top part is mixed with the slurry, the quality is easy to be influenced, the actual pouring amount of the concrete of the pile body is higher than the elevation of the designed pile top by a certain length, in order to ensure the strength of the designed concrete of the pile top, the concrete pile head of the over-poured part above the pile body needs to be broken, the longitudinal steel bar inside the pile head is exposed, and the exposed longitudinal steel bar can be anchored in a bearing platform or a bottom plate steel bar. The existing method for breaking the pile head comprises the following steps:

1. measuring and paying off: drawing a cutting line along the circumferential surface of the pile head in a circumferential direction;

2. c, performing ring cutting by a toothless saw: cutting the pile head circularly by using a toothless saw around the pile head, and avoiding longitudinal steel bars during circular cutting;

3. stripping off pile head steel bars: adopting an air pick to crush the concrete around the reinforcing steel bars from top to bottom along the pile head and stripping the longitudinal reinforcing steel bars;

4. pile head cutting: after all longitudinal steel bars are chiseled out, a plurality of pile breaking holes are drilled on the annular cutting line by adopting an air pick in the direction of the center of the pile body, a steel chisel is used for driving the pile breaking holes, and the steel chisel is repeatedly knocked to break the concrete pile head at the annular pile breaking holes;

5. lifting away the pile head: hoisting the broken and separated pile head out by using hoisting equipment;

6. pile head cleaning: and (5) removing the redundant concrete by manual chiseling to finish top cleaning.

7. And (5) straightening the steel bars.

The steps are only guiding steps, the bond stress between the longitudinal deformed steel bars and the concrete in most of the pile heads is very strong, and the steel bars and the concrete in the pile heads are difficult to peel and separate in actual operation, so that the whole pile head is smoothly lifted out. Because concrete pouring time is longer, and the solidification has been totally, and reinforcing bar surface has the screw thread, and concrete and reinforcing bar bond strength are big, become an organic whole with the reinforcing bar, and constructor can not avoid the reinforcing bar accurately, only breaks the concrete around the reinforcing bar and does not influence the reinforcing bar. Moreover, when the pneumatic pick crushes the concrete, the vibration is large, the concrete on one side can bend the reinforcing steel bars while crushing the concrete, so that the reinforcing steel bars are not peeled off and are twisted to be eight-fold, and therefore, in order to peel the concrete from the twisted reinforcing steel bars, a constructor can only cut the concrete in the middle of the pile head into fragments, the process is time-consuming and low in efficiency; but cannot be lifted out as a whole by leaving a whole piece of columnar concrete in the middle of a circle of steel bars as a guiding step.

It can be seen that, the existing bored pile structure is not only unable to smoothly peel off the reinforcing steel bars, but also needs to perform reinforcing steel bar straightening treatment, namely a manual steel bar wrench, when the reinforcing steel bars are peeled off from the concrete, the reinforcing steel bars are found to be seriously deformed instead of being in a vertically upward state, and each reinforcing steel bar is manually straightened one by one, but the hardness of the reinforcing steel bars is high, the bending direction is irregular, the reinforcing steel bar straightening treatment is very laborious, and a large amount of working hours are consumed.

Therefore, how to improve the existing bored pile structure, realize that the pile head process can smoothly peel off reinforcing bar and concrete, hang the reinforcing bar behind the pile head and remain indeformable, become the problem that awaits a solution in the industry.

SUMMERY OF THE UTILITY MODEL

In order to overcome current bored pile can't amputate the pile head smoothly, and amputate the problem of reinforcing bar distortion behind the pile head, the utility model provides a can peel off bored pile structure of pile head fast.

The utility model discloses technical scheme as follows:

a bored pile structure capable of quickly stripping a pile head comprises a concrete pile and a reinforcement cage positioned in the concrete pile, wherein the concrete pile comprises a pile body section and a pile head section to be cut off, and the bored pile structure is characterized in that a plastic sleeve is arranged at the end of each longitudinal reinforcement of the reinforcement cage and used for separating concrete of the pile head section from the longitudinal reinforcement;

the bottom of the plastic sleeve is not lower than the separation position of the pile head section and the pile body section, and the distance from the bottom of the plastic sleeve to the separation position is not more than 10 cm.

Furthermore, the bottom of the plastic sleeve is positioned at the elevation of the separation position of the pile head section and the pile body section.

According to the above scheme the utility model discloses, its characterized in that, plastic sleeve's top and/or bottom pass through the fastener connect in longitudinal reinforcement.

Furthermore, the bottom of the plastic sleeve is bound on the longitudinal steel bar through a first binding band.

Furthermore, the top of the plastic sleeve is bound and closed up through a second binding band.

Furthermore, the top end of the plastic sleeve is flush with the top end of the longitudinal steel bar, a blocking foam block is arranged at the top end, and the joint of the blocking foam block and the plastic sleeve is connected through an adhesive tape.

According to above-mentioned scheme the utility model discloses, its characterized in that, the end of longitudinal reinforcement passes the stake body section extends to in the stake head section.

According to the above scheme the utility model discloses, a serial communication port, the bottom edge of pile head section is equipped with disconnected stake hole, disconnected stake hole is used for inserting disconnected stake drill rod, and passes through disconnected stake drill rod separation pile head section with stake body section.

Furthermore, the bottom of pile head section is equipped with four in the hoop disconnected stake hole, and be the cross distribution.

Furthermore, the pile breaking holes are inclined upwards by 5-10 degrees.

Further, the length of the broken pile steel drill rod inserted into the pile head section is smaller than the radius of the pile head section but larger than half of the radius.

According to the above scheme the utility model discloses, a serial communication port, the side top of pile head section is equipped with the hoist and mount drill rod that runs through this pile head section, just the both ends of hoist and mount drill rod are exposed the pile head section.

Furthermore, the pile head section is provided with two hoisting steel rods, and the directions of the two hoisting steel rods are opposite.

According to the above scheme the utility model discloses, its beneficial effect lies in:

the utility model discloses drilled pile structure after improvement establishes the plastic sleeve through the longitudinal reinforcement cover in the pile head section that waits to cut off, and the longitudinal reinforcement is not sticky with the concrete of pile head section, can save the step of garrulous concrete, peeling off the reinforcing bar in the current instruction step, has saved a large amount of man-hours; and can avoid because of peeling off the reinforcing bar, the process that leads to the pneumatic pick to break the concrete is bent the reinforcing bar, hangs out pile head section back, and every reinforcing bar is all indeformable to save the step of alignment reinforcing bar, further save man-hour, greatly improved the efficiency of construction.

Drawings

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a schematic view of inserting a pile-breaking drill steel;

FIG. 3 is a schematic view of inserting a hoisting drill steel;

FIG. 4 is a schematic view of a suspended pile head section;

FIG. 5 is a schematic view of the top of the longitudinal rebar with a second strap;

FIG. 6 is a schematic view of a longitudinal rebar with a plugging foam block on top;

FIG. 7 is a flow chart of prior art instruction steps;

fig. 8 is a diagram of a prior art actual construction finished product.

In the figure, 1, a pile body section; 102. drawing a line; 2. a pile head section; 20. crushing the pile head; 3. longitudinal reinforcing steel bars; 4. plastic sleeve; 5. breaking the pile steel chisel; 50. pile breaking holes; 6. hoisting the steel chisel; 71. a first strap; 72. a second strap; 8. plugging the foam block; 80. an adhesive tape.

Detailed Description

For better understanding of the objects, technical solutions and technical effects of the present invention, the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be noted that the following examples are only for explaining the present invention and are not intended to limit the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution.

The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of technical features. The meaning of "a number" is two or more unless specifically defined otherwise.

It should be noted that, in all the figures, only the part of the shaft section exposed out of the ground is shown with respect to the shaft section of the bored pile, and the part buried in the ground is not shown.

As shown in fig. 1 to 4, a bored pile structure capable of quickly stripping pile heads comprises a concrete pile and a reinforcement cage located inside the concrete pile, wherein the concrete pile comprises a pile body section 1 and a pile head section 2 to be cut off, the pile body section 1 and the pile head section 2 to be cut off are solidified into an integral concrete pile, a plastic sleeve 4 is arranged at the end of each longitudinal steel bar 3 of the reinforcement cage, and the plastic sleeve 4 is used for separating the concrete of the pile head section 2 and the longitudinal steel bar 3. After the poured concrete is condensed, the steel bars sleeved with the plastic sleeve 4 are not bonded with the concrete, only the plastic sleeve 4 is bonded with the pile head section 2, after the pile head section 2 is lifted out, the plastic sleeve 4 is separated from the longitudinal steel bars 3, and the head ends of the longitudinal steel bars 3 are exposed, so that the steps of crushing the concrete and stripping the steel bars in the existing guiding step can be omitted, the step of cutting off the pile head can be directly carried out, and a large amount of working hours are saved; and can avoid the pneumatic pick to break up the concrete process and bend the reinforcing bar, hang out the pile head section 2 that breaks away from after, every reinforcing bar is all straight upward indeformable to save the step of alignment reinforcing bar, simple clearance can be used for with the ligature of top cushion cap, further save man-hour, raise the efficiency.

The utility model discloses in, plastic sleeve 4's bottom is not less than pile head section 2 and the isolated position of pile body section 1, and plastic sleeve's bottom is not more than 10 centimetres to the distance of this isolated position, ensures cutting off pile head section 2 back, and the plastic sleeve together peels off the end of longitudinal reinforcement along with pile head section 2. In a preferred embodiment, the bottom of the plastic sleeve 4 is as high as the separation position of the pile head section 2 and the pile body section 1; when the length of the plastic sleeve 4 is cut, the length of the pile head section 2 to be cut off is cut according to the designed length, and the length of the plastic sleeve can be 2 centimeters shorter than that of the pile head section 2.

In the utility model, the bottom of the plastic sleeve 4 is bound on the longitudinal steel bar 3 through the first binding band 71, the first binding band 71 ties the plastic sleeve 4 on the longitudinal steel bar 3, and the plastic sleeve is prevented from falling downwards; still avoid concreting in-process plastic sleeve 4 come-up, lead to it to shift upwards along longitudinal reinforcement 3. After the concrete and the reinforcement cage are solidified, in the pile head section, although the plastic sleeve 4 is tied with the first binding band 71, the concrete of the pile head section 2 is firmly solidified with the plastic sleeve 4, and when the pile head section 2 is lifted out, the plastic sleeve 4 is pulled away from the longitudinal reinforcement 3 along with the pile head section 2. In addition, the first binding band 71 can reduce the concrete entering the plastic sleeve 4, so that the subsequent cleaning of the concrete residue of the longitudinal steel bar 3 is facilitated.

In an alternative embodiment, as shown in fig. 5, the top of the plastic sleeve 4 is bound with a second binding band 72 to prevent the plastic sleeve from falling down, and the second binding band 72 forms a closed end at the top of the plastic sleeve 4, so that the top of the plastic sleeve 4 is sealed, thereby reducing the amount of concrete poured into the plastic sleeve 4 from the top, and also reducing the amount of concrete in the plastic sleeve 4 as much as possible to facilitate the subsequent steel bar cleaning operation.

As shown in fig. 6, in another alternative embodiment, the top end of the plastic sleeve 4 is flush with the top end of the longitudinal steel bar 3, and the top end is provided with a blocking foam block 8, the joint between the blocking foam block 8 and the plastic sleeve 4 is connected by an adhesive tape 80, the top of the plastic sleeve 4 is completely sealed by the blocking foam block 8, so that concrete can be prevented from being poured into the plastic sleeve 4 from the top, and the blocking effect of the top opening is better.

The utility model discloses in, the head end of longitudinal reinforcement 3 passes in stake body section 1 and extends to stake head section 2. The utility model is used for separate pile head section 2 on vertical reinforcing bar 3 to make pile head section 2 after-separating, the end that remains vertical reinforcing bar 3 exposes at the top of pile body section 1.

The bottom edge of the pile head section 2 is provided with a pile breaking hole 50, the pile breaking hole 50 is used for inserting a pile breaking steel chisel 5, and the pile head section 2 and the pile body section 1 are separated through the pile breaking steel chisel 5. Specifically, the bottom of the pile head section 2 is provided with four pile breaking holes 50 in a circumferential direction and distributed in a cross shape, so that every two pile breaking steel rods 5 are in one group and located on the opposite side of the drilled pile. The four pile-breaking steel rods 5 respectively cut the pile head section 2 and the pile body section 1 at four directions at intervals, so that the actual breaking surface is uniform, and the elevation positions of the actual breaking surface meet the requirements.

In a preferred embodiment, the pile-breaking hole 50 is inclined upwards by 5-10 degrees, namely the direction from the peripheral surface to the center of the drilled pile is inclined from bottom to top, and the included angle between the pile-breaking hole and the horizontal plane is 5-10 degrees; the bottom surface of the cut pile head section 2 is prevented from protruding, the surface of the pile body section 1 after the pile head is cut is prevented from sinking, and the situation that the fracture surface is lower than the scribing height to cause the pile body section not to meet the design requirements can be prevented.

In a preferred embodiment the length of the pile breaking drill steel 5 inserted into the pile head section 2 is less than the radius of the pile head section 2 but more than half of the radius. After the pile-breaking steel chisel 5 is inserted, the wedge-shaped tail end is inserted into the pile head section 2, and when the length of the pile-breaking steel chisel penetrating into the pile head section 2 is more than half of the radius, the pile head can be effectively cut off.

The utility model discloses in, the side top of pile head section 2 is equipped with the hoist and mount drill rod 6 that runs through this pile head section 2, and the both ends of hoist and mount drill rod 6 expose pile head section 2. The end part of the hoisting steel chisel 6 of the pile head section 2 is exposed for hanging the hoisting rope to complete the hoisting work of the pile head. In a preferred embodiment the pile head section 2 is provided with two hoisting drill rods 6, and the two hoisting drill rods 6 are in opposite directions, e.g. one hoisting drill rod 6 passes through the pile head section 2 from left to right and the other hoisting drill rod 6 passes through the pile head section 2 from right to left. The hoisting piece consisting of the two hoisting steel rods 6 in parallel and in the direction ensures that the stress is more balanced when the hoisting rope hoists the pile head section 2, and the pile head section 2 can be stably hoisted.

The utility model also provides a construction method of the bored pile that can peel off pile head fast, including following step:

step 1, sleeving a plastic sleeve 4 on the top end of a longitudinal steel bar 3 of a steel bar cage; specifically, the method comprises the following steps:

s101, sleeving a plastic sleeve 4 at the end part of the longitudinal steel bar 3 from top to bottom, wherein the plastic sleeve 4 can be a PVC sleeve, and the bottom end of the PVC sleeve is not lower than the elevation of the broken position of the pile head end;

and S102, binding the bottom of the plastic sleeve 4 by using the first binding band 71.

The first binding band 71 allows the plastic sleeve 4 to be tied to the longitudinal steel bar 3, and when concrete is poured, the plastic sleeve 4 will not float upward along with the concrete and will not be displaced upward along the longitudinal steel bar 3.

In one embodiment, the bottom end of the plastic sleeve 4 is located at the elevation of the pile head breaking position, ensuring that after the pile head section 2 is cut off, the plastic sleeve together with the pile head section 2 peels off the end of the longitudinal steel bar; it is also ensured that the longitudinal reinforcement 3 can be completely separated from the concrete in the pile head section 2 to be cut off.

The step of sleeving the plastic sleeve 4 in the step 1 further comprises the following steps: the top of the plastic sleeve 4 is bound by the second binding band 72 and is closed, the second binding band 72 is matched with the first binding band 71 to seal or close the upper and lower parts of the plastic sleeve 4, and the concrete is prevented from being poured into the plastic sleeve 4 from the top.

Instead of using the second strap 72, it is also possible to use a blocking foam block 8, specifically, the top end of the plastic sleeve 4 is aligned with the top end of the longitudinal steel bar 3, and the blocking foam block 8 is placed on the top end surface of the plastic sleeve 4, and the adhesive tape 80 is wound around the joint of the blocking foam block 8 and the plastic sleeve 4.

Step 2, hoisting the reinforcement cage into the pile hole; before placing the steel bar cage, checking whether the plastic sleeve 4 at the top end of each longitudinal steel bar 3 is intact.

And 3, pouring and maintaining the concrete.

Through preceding three steps, accomplish the utility model discloses a bored pile, this bored pile's steel reinforcement cage's longitudinal reinforcement 3's head pot head is equipped with the plastic sleeve 4 that is used for interval pile head section 2 and longitudinal reinforcement 3 for the concrete of longitudinal reinforcement and pile head section is not adhered, thereby the convenience is when peeling off bored pile's pile head, saves the step of peeling off the reinforcing bar.

Step 4, drawing a line 102 in the circumferential direction at the broken position of the pile head section 2, and drilling a plurality of pile breaking holes 50 at the drawn line 102; the method comprises the following specific steps: uniformly drilling four pile breaking holes 50 along the drawing line 102 of the pile head section 2, wherein the four pile breaking holes 50 are distributed on the circumferential surface of the pile head section 2 in a cross shape; when the pile hole 50 is broken, the drill bit of the air pick is inclined from bottom to top, the inclination angle ranges from 5 degrees to 10 degrees, the section can be ensured to be higher than the upper surface of the pile body section 1, the pile body section 1 is not damaged, and the foundation pile after the pile head section 2 is cut off is ensured to meet the requirements.

Step 5, inserting a pile breaking steel rod 5, and breaking the pile head section 2 from the pile body section 1 by utilizing upward extrusion force generated by the wedge-shaped tail part of the pile breaking steel rod 5; the method comprises the following specific steps: and inserting the pile breaking steel rod 5 into the pile head section 2, repeatedly knocking the pile breaking steel rod 5 until the pile head section 2 is separated from the pile body section 1, wherein the length of the pile breaking steel rod 5 inserted into the pile head section 2 is smaller than the radius of the pile head section 2 but larger than one half of the radius.

Step 6, inserting hoisting steel rods 6 into the pile head sections 2, and hoisting the pile head sections 2 away; the method specifically comprises the following steps:

s601, arranging two parallel through holes on the pile head section 2;

s602, inserting a hoisting steel chisel 6 into each through hole, exposing pile head sections 2 at two ends of the hoisting steel chisel 6, and enabling the directions of the two hoisting steel chisels 6 to be opposite;

s603, respectively hanging the two lifting ropes on the exposed hoisting steel brazes 6 at the two opposite sides of the pile head section 2;

s604, hoisting the pile head section 2 by using the hoisting equipment, and confirming that the concrete of the pile head section 2 is completely separated from the pile body section 1 again before hoisting; the hoisting process slowly promotes, avoids causing the damage to longitudinal reinforcement 3.

Step 7, cleaning the pile head; specifically, excess concrete on the pile body section 1 is chiseled according to the designed elevation on the fracture surface, and then a handheld polishing machine is used for polishing and leveling.

As shown in fig. 1, 7 and 8, to sum up, the utility model discloses can realize peeling off the pile head of drilling pile fast, save the process that the pneumatic pick garrulous concrete, peeled off the reinforcing bar, also can not lead to pile head section 2 to break into pile head fragment 20 yet to can hang out the columnar pile head concrete of monoblock fast, need not to clear up the concrete fragment; and after the pile head section is removed, the exposed head end of the steel bar is straight upwards, the step of straightening the steel bar is omitted, and the construction efficiency is greatly improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A bored pile structure capable of quickly stripping a pile head is characterized by comprising a concrete pile and a reinforcement cage positioned in the concrete pile, wherein the concrete pile comprises a pile body section and a pile head section to be cut off, the end of each longitudinal reinforcement of the reinforcement cage is provided with a plastic sleeve, and the plastic sleeve is used for separating concrete of the pile head section and the longitudinal reinforcement;

the bottom of the plastic sleeve is not lower than the separation position of the pile head section and the pile body section, and the distance from the bottom of the plastic sleeve to the separation position is not more than 10 cm.

2. The bored pile structure of quick strippable pile heads of claim 1, wherein the top and/or bottom of the plastic sleeve is connected to the longitudinal reinforcement bars by fasteners.

3. The bored pile structure of claim 2, wherein the bottom of the plastic sleeve is tied to the longitudinal steel bars by a first tie.

4. The drilled pile structure with quick release pile head according to claim 2, wherein the top of the plastic sleeve is bound and closed by a second binding band.

5. The bored pile structure capable of rapidly stripping the pile head according to claim 2, wherein the top end of the plastic sleeve is flush with the top end of the longitudinal steel bar, and a blocking foam block is arranged at the top end, and the joint of the blocking foam block and the plastic sleeve is connected through an adhesive tape.

6. The bored pile structure of quick strippable pile head of claim 1, wherein the ends of the longitudinal reinforcing bars extend through the body section and into the head section.

7. The bored pile structure capable of rapidly stripping off a pile head according to claim 1, wherein the bottom edge of the pile head section is circumferentially provided with four pile breaking holes in a cross shape, and the pile breaking holes are used for inserting pile breaking steel rods.

8. The bored pile structure capable of rapidly stripping a pile head according to claim 1, wherein the length of the pile-breaking drill steel inserted into the pile head section is smaller than the radius of the pile head section but greater than half of the radius.

9. The bored pile structure capable of rapidly stripping off a pile head according to claim 1, wherein a hoisting drill steel penetrating the pile head section is provided above the side surface of the pile head section, and both ends of the hoisting drill steel are exposed out of the pile head section.

10. The bored pile structure capable of quickly peeling off a pile head according to claim 9, wherein the pile head section is provided with two hoisting steel rods in opposite directions.

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