CN216515605U - Drilling bored concrete pile top elevation controlling means - Google Patents

Abstract

The utility model belongs to the field of practical tools for slurry retaining wall cast-in-place piles in building engineering, and particularly relates to a pile top elevation control device for a cast-in-place pile, which is suitable for pile top elevation control of a slurry retaining wall cast-in-place pile process under all geological conditions. The top elevation control device utilizes the floating ball and the concrete floating grate to realize that the concrete pouring surface reaches the designed elevation judgment, the floating grate and the floating ball forecast, and the lower floating grate confirms for the second time, so that the concrete over-pouring is avoided, and the purpose of saving the cost is achieved.

Description

Drilling bored concrete pile top elevation controlling means

Technical Field

The utility model belongs to the field of practical tools for slurry retaining wall cast-in-place piles in building engineering, and particularly relates to a pile top elevation control device which is suitable for controlling the pile top elevation of a slurry retaining wall cast-in-place pile process under all geological conditions.

Background

The bored pile is widely applied in the modern building industry, especially for large buildings with higher requirements on performance and bearing capacity, the bored pile is used as a pile foundation, the designed pile top elevation is often lower than the drilling mud liquid level when underwater pouring is carried out in the construction of the mud-wall-protecting bored pile, the accurate elevation of the concrete surface cannot be intuitively measured, the conventional control method adopts a measuring hammer to measure and judge the concrete surface by a pouring worker, because the parameters of each plate of concrete and the specific gravity difference of mud in holes when underwater pouring concrete, no fixed standard is needed when measurement is carried out, the elevation of the pile top is suddenly lowered after pile forming excavation, pile splicing is needed when the concrete surface is lower than the pile top elevation, the construction period is delayed, and manpower and material resources are consumed: when the concrete surface is higher than the designed elevation, the concrete is wasted, and few sides are wasted, and more sides are dozens of sides.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the device for controlling the elevation of the concrete at the top of the bored pile, which is simple to operate on site, so that the concrete pouring surface is accurately controlled to reach the designed elevation, and the problems of over-pouring and under-pouring of the concrete are avoided.

The utility model provides a pile top elevation control device for a cast-in-situ bored pile, which comprises a fixed support hung on a steel casing, wherein the fixed support is connected with a suspension ring suspended in the steel casing, a telescopic rod penetrates through the suspension ring, the telescopic rod is suspended on the suspension ring through a floating ball at the top end, a rod body vertically hangs down, a lower floating grate capable of sliding along the rod body and being fixed at any height is penetrated through a tail section supporting rod of the telescopic rod, a telescopic rod slideway is arranged in the middle of the lower floating grate, and a plurality of slurry leakage holes for filtering concrete aggregate are arranged on the periphery of the lower floating grate.

Further, still including the come-up comb of bowl form, the come-up comb is worn on the end branch of telescopic link, goes up the comb and takes on the comb that floats down, installs the capstan winch on the fixed bolster, and the stranded conductor of capstan winch hangs down to drag the come-up comb and climbs along the body of rod, and the centre of come-up comb is provided with the branch lantern ring, and the peripheral comb clearance that floats of the branch lantern ring is less than the particle size of concrete coarse aggregate.

Furthermore, the fixed bolster is including setting up the arm lock and the stull at top inside and outside the steel protects a section of thick bamboo, and U type frame is constituteed to arm lock and stull, is provided with the bolt that advances to the steel protects a section of thick bamboo precession on the arm lock in the outside, and the stull extends to the steel protects a section of thick bamboo, hangs the end of encorbelmenting that the ring connection was at the stull.

Furthermore, the telescopic rod comprises a plurality of sections of hollow supporting rods which are sequentially connected in a socket mode, the tail end of each section of supporting rod is provided with a contraction groove, and the outer wall of each section of supporting rod is provided with a screw thread which is matched with the internal thread sleeve to fix the lower section of supporting rod in the upper section of supporting rod.

Furthermore, the lower floating grate is a circular plate, a central hole can penetrate through the telescopic pipe, the hole wall extends downwards to form a telescopic rod slide way, and a screw which is screwed into the telescopic rod is arranged on the hole wall.

Further, the suspension ring is 10cm away from the wall of the steel casing.

Furthermore, the length of each section of the telescopic rod is 3m, and the total length of the telescopic rod is less than or equal to 9 m.

Furthermore, the slurry leaking holes in the lower floating grate are arranged around the telescopic rod slide way for two circles, 12 holes are uniformly distributed on the outer periphery, 6 holes are uniformly distributed on the inner periphery, and the aperture of the slurry leaking holes is 0.5 cm.

Furthermore, the floating ball is a hollow stainless steel ball.

Compared with the prior art, the utility model has the advantages that:

the utility model provides a pile top elevation control device for a cast-in-situ bored pile, which mainly solves the problem that concrete is wasted or pile splicing is caused in order to prevent the condition that the cast-in-situ bored pile exceeds a designed elevation or does not reach the designed elevation when concrete is poured before the concrete is poured after a guide pipe is put down on the site of a slurry retaining wall cast-in-situ bored pile. The device simple structure, make things convenient for the site operation, and can push up when the lower flotation grate through the concrete face of filling, promote flotation grate drive telescopic link (the telescopic link can be according to mud liquid level and concrete design elevation surface setting) and floater uplift upwards, when the floater goes up the come-up suspension ring, can infer that the concrete face of filling probably has reached the design elevation, adopt the capstan winch to shake the come-up flotation grate out the mud face again, when confirming the coarse aggregate that has mix in the concrete in the come-up flotation grate, think that there is closely knit concrete in the pile top elevation scope, if unseen obvious concrete coarse aggregate thinks pile top lain the thick liquid density great, will comb again and sink in the mud until can take out the stone and think that the concrete face reaches the design elevation.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of C in fig. 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 1.

Fig. 4 is a partially enlarged view of fig. 1 at B.

Fig. 5 is a schematic structural view of the upper floating grate.

Fig. 6 is a schematic structural view of the lower grate.

In the figure: 1-a steel casing; 2-fixing the bracket; 2.1-bolt; 2.2-clamping arm; 2.3-cross brace; 3-a suspension ring; 4-a winch; 5-floating ball; 6-stranding; 7-floating grate; 7.1-strut collar; 8-lower floating grate; 8.1-telescopic rod slideway; 8.2-slurry leakage holes; 8.3-screw; 9-a telescopic rod; 9.1-strut; 9.2-internal threaded sleeve; 9.3-shrink groove.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

As shown in fig. 1; the utility model provides a drilling bored concrete pile top elevation controlling means, is connected with on the fixed bolster 2 that is used for hanging on steel protects a 1 hangs ring 3 that hangs in steel protects a 1 including being used for hanging on the fixed bolster 2, hangs ring 3 apart from the section of thick bamboo wall 10cm of steel protects a 1. The telescopic rod 9 is penetrated in the suspension ring 3, the telescopic rod 9 is suspended on the suspension ring 3 through the floating ball 5 at the top end, the rod body vertically hangs down, the lower floating grate 8 which can slide along the rod body and can be fixed at any height is penetrated on the tail section supporting rod of the telescopic rod 9, the telescopic rod slideway 8.1 is arranged in the middle of the lower floating grate 8, and the periphery is provided with a plurality of slurry leakage holes 8.2 for filtering concrete aggregate.

When the concrete pouring surface is pushed to the lower floating grate 8, the concrete aggregate pushes the lower floating grate 8 to drive the telescopic rod 9 and the floating ball 5 to be lifted upwards, and when the floating ball 5 floats out of the suspension ring 3, the concrete pouring surface can be inferred to possibly reach the designed elevation. In order to further judge whether closely knit in the concrete in the pile bolck elevation, as shown in fig. 4, fig. 5, still include the last floating grate 7 of bowl form, go up floating grate 7 and wear on the end branch of telescopic link 9, go up floating grate 7 and take on lower floating grate 8, install capstan winch 4 on the fixed bolster 2, the stranded wire 6 of capstan winch 4 hangs down and draws floating grate 7 to climb along the body of rod, the centre of going up floating grate 7 is provided with the branch lantern ring 7.1, the peripheral floating grate clearance of the branch lantern ring 7.1 is less than the particle size of concrete coarse aggregate. The winch 4 is adopted to shake the upper floating grate 7 out of the slurry surface, when the concrete inner-mixed coarse aggregate is determined to be in the upper floating grate 7, the dense concrete is considered to be in the pile top elevation range, if the obvious concrete coarse aggregate is not found, the pile top floating slurry density is considered to be large, the upper floating grate 7 is sunk into the slurry again until the stone can be fished out, and the concrete surface is considered to reach the design elevation.

As shown in fig. 3; the fixed bolster 2 is including setting up in the steel protects a section of thick bamboo, the stull 2.3 at outer arm lock 2.2 and top, arm lock 2.2 and stull 2.3 constitute U type frame and ride on the section of thick bamboo wall of a steel protects a section of thick bamboo 1, be provided with the bolt 2.1 to the steel protects a section of thick bamboo 1 precession on in arm lock 2.2 in the outside, bolt 2.1 supports tight steel and protects a section of thick bamboo 1, with fixed bolster 2 locking on a steel protects a section of thick bamboo 1, stull 2.3 extends to a steel protects a section of thick bamboo 1, hang ring 3 and connect the end of encorbelmenting at stull 2.3.

The telescopic rod 9 is composed of a plurality of sections of supporting rods, and every two sections of supporting rods are fixed according to the required length through telescopic joints. As shown in fig. 2; the telescopic rod 9 comprises a plurality of sections of supporting rods 9.1 which are sequentially connected in a socket mode, the supporting rods 9.1 are hollow tubes made of stainless steel, the tail end of each section of supporting rod 9.1 is provided with a contraction groove 9.3, and the outer wall of each section of supporting rod is provided with a screw thread which is matched with an internal thread sleeve 9.2 to fix the lower section of supporting rod in the upper section of supporting rod. The length of the telescopic rod 9 is determined according to the difference between the designed elevation of the cast-in-place bored pile concrete and the elevation of the pile casing, the length of each section of support rod 9.1 is 3m, and the total length of the telescopic rod 9 is less than or equal to 9 m. When one section of the supporting rod 9.1 is insufficient, the telescopic rod 9 is lengthened by an expansion joint.

As shown in fig. 6; the lower floating grate 8 is a circular plate, the central hole can pass through the telescopic pipe, the hole wall extends downwards to form a telescopic rod slideway 8.1, and a screw 8.3 which is screwed into the telescopic rod 9 is arranged on the hole wall. When the screw 8.3 precession end supported tight telescopic link 9, with the high department of presetting of telescopic link 9 of lower flotation comb 8 locking, when the screw 8.3 was unscrewed, lower flotation comb 8 was the sliding adjustment position on telescopic link 9. Slurry leakage holes 8.2 on the lower floating grate 8 are arranged around a telescopic rod slideway 8.1 for two circles, 12 holes are uniformly distributed on the outer periphery, 6 holes are uniformly distributed on the inner periphery, and the aperture of the slurry leakage holes 8.2 is 0.5 cm.

The floating ball 5 is a hollow stainless steel ball, the supporting rod 9.1 is a hollow pipe made of stainless steel, the whole density of the pile top elevation control device is controlled to be about 2.5kg/m, and the mass of the telescopic rod and the floating ball can be changed for adjustment.

The concrete operation steps

(1) According to the slurry liquid level elevation of the cast-in-situ bored pile in the concrete pouring process and the elevation difference of the designed pile top concrete pouring surface, the length of the telescopic rod 9 and the fixed position of the lower floating grate 8 are adjusted, and the length of the telescopic rod is adjusted to be slightly smaller than the elevation difference.

(2) After the guide pipe is lowered for secondary hole cleaning, the device consisting of the adjusted floating ball 5, the telescopic rod 9 and the concrete floating grate is fixed on the steel casing 1 by utilizing the fixed support 2 and the suspension ring 3.

(3) In the concrete pouring process of the bored pile, along with the rise of the concrete liquid level, when the pile top elevation is reached, the position of the bottom surface of the concrete lower floating grate 8 is also set in the front, the concrete pushes the lower floating grate 8 to move upwards, so that the floating ball 5 connected with the lower floating grate 8 leaves the suspension ring 3, and the fact that the concrete pouring surface can reach the designed elevation is inferred.

(4) Whether the concrete is compact in the elevation of the pile top is checked by winches 4 to wink the floating grate 7 to form a slurry surface, if concrete coarse aggregate is arranged in the floating grate 7, namely the concrete surface reaches the designed elevation, the pouring can be stopped, if no obvious coarse aggregate is found in the floating grate 7, the slurry needs to be sunk again to the lower floating grate 8, the pouring is continued until the concrete coarse aggregate can be fished out from the floating grate 7 (the step mainly considers that in the pouring process, the density of the hole bottom slurry is increased along with the lapse of the concrete pouring time or the density of the floating slurry on the top surface of the concrete is too large, so that the phenomenon of false alarm appears in the floating grate during the pouring, and the phenomenon that the pile top elevation is lower than the designed elevation due to the fact that the concrete is insufficient to be poured to cause the trouble that the pile top is lower than the designed elevation to mend the pile head in the later period is easily caused by the geological condition of sand layer and the clay layer with the lower plastic index.

The concrete filling surface is judged by the aid of the floating balls and the concrete floating grate to reach a designed elevation, concrete over-filling is avoided, and accordingly cost is saved. The pile top concrete elevation control device for the cast-in-situ bored pile is simple in field operation, and mainly adopts the telescopic rod and the lower floating grate, the length of the telescopic rod and the lower floating grate can be adjusted according to the elevation of the pile casing and the elevation difference of the designed concrete liquid level, the concrete surface reaches the designed elevation to push the concrete grate to move upwards so as to push the floating ball out of the suspension ring, the fact that the concrete is possibly poured to the designed elevation is inferred, coarse aggregate fished by the floating grate is adopted to determine that the concrete surface is poured to the designed elevation, the problem of preventing over-filling and concrete waste is solved, the problem of avoiding post-excavation supplement and pile head connection is solved when under-filling is achieved, and the concrete pouring surface is accurately controlled to reach the designed elevation.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a drilling bored concrete pile top elevation controlling means which characterized in that: including being used for hanging fixed bolster (2) on a steel protects a section of thick bamboo (1), be connected with on fixed bolster (2) and hang ring (3) that hang in a steel protects a section of thick bamboo (1), it has worn telescopic link (9) in ring (3), floater (5) through the top are hung in midair on hanging ring (3), the vertical drop of pole body, it can slide along the pole body to wear on the end branch of telescopic link (9), and can fix lower flotation grate (8) in arbitrary high department, telescopic link slide (8.1) have been seted up to the centre of lower flotation grate (8), a plurality of hourglass thick liquid holes (8.2) that are used for filtering concrete aggregate have been seted up to the periphery.

2. The pile top elevation control device for the cast-in-situ bored pile according to claim 1, wherein: still including the come-up comb (7) of bowl form, come-up comb (7) are worn on the last festival branch of telescopic link (9), go up and float comb (7) and take on float comb (8) down, install capstan winch (4) on fixed bolster (2), stranded conductor (6) of capstan winch (4) hang down and draw and drag come-up comb (7) to climb along the body of rod, the centre of come-up comb (7) is provided with the branch lantern ring (7.1), the peripheral float comb clearance of branch lantern ring (7.1) is less than the particle size of concrete coarse aggregate.

3. The pile top elevation control device for the bored pile according to claim 1 or 2, wherein: the fixed bolster (2) are including setting up horizontal bar (2.3) at inside and outside arm lock (2.2) and top in the steel protects a section of thick bamboo, and U type frame is constituteed with horizontal bar (2.3) to arm lock (2.2), is provided with bolt (2.1) to steel protects a section of thick bamboo (1) precession on in arm lock (2.2) in the outside, and horizontal bar (2.3) extend to steel protects a section of thick bamboo (1), hang ring (3) and connect the end of encorbelmenting at horizontal bar (2.3).

4. The pile top elevation control device for the cast-in-situ bored pile according to claim 3, wherein: the telescopic rod (9) comprises a plurality of hollow supporting rods (9.1) which are sequentially connected in a socket mode, the tail end of each supporting rod (9.1) is provided with a contraction groove (9.3), and the outer wall of each supporting rod is provided with a screw thread which is matched with an internal thread sleeve (9.2) to fix the lower supporting rod in the upper supporting rod.

5. The pile top elevation control device for the cast-in-situ bored pile according to claim 1, wherein: the lower floating grate (8) is a circular plate, a central hole can penetrate through the telescopic pipe, the hole wall extends downwards to form a telescopic rod slide way (8.1), and a screw (8.3) which is screwed into the telescopic rod (9) is arranged on the hole wall.

6. The pile top elevation control device for the cast-in-situ bored pile according to claim 3, wherein: the distance between the suspension ring (3) and the wall of the steel casing (1) is 10 cm.

7. The pile top elevation control device for the cast-in-situ bored pile according to claim 4, wherein: the length of each section of the support rod (9.1) is 3m, and the total length of the telescopic rod (9) is less than or equal to 9 m.

8. The pile top elevation control device for the cast-in-situ bored pile according to claim 5, wherein: slurry leaking holes (8.2) in the lower floating grate (8) are arranged around a telescopic rod slide way (8.1) for two weeks, 12 holes are uniformly distributed in the periphery, 6 holes are uniformly distributed in the inner periphery, and the aperture of the slurry leaking holes (8.2) is 0.5 cm.

9. The pile top elevation control device for the cast-in-situ bored pile according to claim 1, wherein: the floating ball (5) is a hollow stainless steel ball.

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