CN211472477U - Construction tool for secondary pouring of cast-in-place pile - Google Patents

Abstract

The utility model discloses a bored concrete pile secondary filling's construction tool, it includes the pipe, is provided with movable end cap at the pipe end, and movable end cap includes body and bottom, and the one end of body communicates in the pipe end, and the bottom articulates in the body other end, and the body port at place can be followed to the bottom and sealed after articulated department rotates. The utility model discloses a movable plug its bottom can seal the port of body when carrying out the secondary and filling, keeps apart the pipe inside and outside environment, prevents that mud from getting into in the pile body concrete that has filled.

Description

Construction tool for secondary pouring of cast-in-place pile

Technical Field

The utility model relates to a construction tool that bored concrete pile secondary was filled.

Background

In recent years, in the foundation construction of high-rise and super high-rise buildings, the pile foundation technology is generally applied, the length of a pile body is longer and longer along with the increase of the volume of the super high-rise buildings, the diameter is larger and larger, and the rotary drilling bored pile is taken as the most common pile foundation form, has the advantages of high hole forming speed and small environmental influence, and is widely applied. However, the following situations are often encountered in the construction process of the cast-in-place pile:

in the environment of weak soil layer, geological conditions are poor, the hole dado stability is relatively poor in the pore-forming process, the measure of long pile casing dado needs to be used, however, after concrete pouring is completed and the pile casings are pulled up, due to the difference of pore-forming of pore walls, deviation occurs in the prediction of concrete reduction, and the condition that the pile top elevation is lower than the designed elevation is caused. At present, in order to solve the technical problems, the traditional dry pile connecting method is mainly utilized, namely, the poured concrete is completely solidified, a broken pile is excavated in the later period, a template is installed after the butt joint pile head is cleaned, and the concrete with a higher mark number is used for pouring again. The pile splicing cost of the dry pile splicing method is high, a section of maintenance period is needed after pile splicing, the construction period is delayed by pile splicing and maintenance, and the pile quality is not good when the pile is formed in one step. In addition, the existing pile splicing guide pipe can cause the condition that slurry enters the guide pipe in the process of inserting the guide pipe into a pile hole, so that the slurry enters the concrete of a pile body and the forming quality of the pile body is influenced.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned defect among the prior art, the utility model provides a can prevent that mud from getting into the construction tool that bored concrete pile secondary was filled in the pipe, technical scheme is as follows:

it includes the pipe that bored concrete pile secondary filled's appurtenance includes, and the pipe end is provided with movable end cap, and movable end cap includes body and bottom, and the one end of body communicates in the pipe end, and the bottom articulates in the body other end, and the bottom can be followed articulated department and rotated the back and seal the body port at place.

Further, a bottom cover limiting block is arranged on the pipe body and arranged on the inner wall of the pipe body opposite to the hinged position; when the end opening of the tube body is sealed by the bottom cover, the edge of the bottom cover is tightly attached to the inner wall of the tube body and is limited to the horizontal position by the bottom cover limiting block.

Furthermore, the movable plug further comprises a connecting spiral ring, one end of the connecting spiral ring is in threaded connection with the tail end of the guide pipe, a clamping groove is formed in the inner wall of the other end of the connecting spiral ring, and a convex edge is arranged on the outer wall of the end, communicated with the guide pipe, of the pipe body and clamped in the clamping groove.

Furthermore, a connecting spiral ring limiting block is arranged on the outer wall of the pipe body.

Furthermore, the tube body is hinged with the bottom cover through a connecting hinge, one leaf of the connecting hinge is fixedly connected to the outer wall of the tail end of the tube body, and the other leaf is fixedly connected with the bottom cover.

Furthermore, the leaf that connects loose-leaf and body fixed connection is the L type.

Furthermore, a semicircular groove is formed around the edge of the bottom cover, and a rubber sealing ring is tightly sleeved in the semicircular groove.

Furthermore, a hemp rope is arranged between the bottom of the semicircular groove and the rubber sealing ring.

Furthermore, the bottom cover is composed of a wafer and a circular ring, the circular ring is arranged in a protruding mode along the circumference of the bottom cover towards the inside of the pipe body, and the semicircular groove is formed in the outer ring of the circular ring.

Compared with the prior art, the utility model has the advantages that: the bottom cover of the movable plug can seal the port of the pipe body when secondary pouring is carried out, the internal and external environments of the guide pipe are isolated, and mud is prevented from entering poured pile body concrete.

Drawings

Fig. 1 is a structural schematic diagram of a construction tool for secondary pouring of a cast-in-place pile.

Fig. 2 is an enlarged view of fig. 1 at a.

Fig. 3 is a construction tool pouring use schematic diagram of secondary pouring of the pouring pile.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the present invention, taken in conjunction with the accompanying drawings and the detailed description, is given in a non-limiting manner.

As shown in fig. 1, the construction tool for secondary pouring of the cast-in-place pile comprises a guide pipe 1, a movable plug 2 is arranged at the tail end of the guide pipe, the movable plug 2 comprises a pipe body 3, a bottom cover 5 and a connecting spiral ring 4, one end of the pipe body 3 is connected with the connecting spiral ring 4, the other end of the pipe body is connected with the bottom cover 5, and the movable plug 2 is connected with the guide pipe 1 through the connecting spiral ring 4.

The pipe body 3 of activity end cap 2 is cylindrical hollow tube, is equipped with the protruding edge 6 of round on the one end outer wall of pipe body 3 for with connect the spiro ring 4 and be connected, still be equipped with the connection spiro ring stopper 7 that is used for the restriction to connect 4 home range of spiro ring on the outer wall of upper portion in pipe body 3 simultaneously, the stopper 7 of this embodiment establishes to 3. The other end of the pipe body 3 is hinged with a bottom cover through a connecting hinge, wherein one blade of the connecting hinge 8 is welded on the outer wall of the pipe body 3, the blade fixedly connected with the pipe body 3 is L-shaped, and the other blade is welded with the bottom cover. The pipe body 3 is welded with the bottom cover limiting block 10 on the inner wall of the opposite side of the connecting hinge 8, and the bottom cover limiting block 10 can enable the bottom cover 5 to keep a horizontal position in the process of inserting into the pile hole to be connected with the pipe body in a sealing mode, so that mud is prevented from entering the pipe.

The bottom 5 is circular steel sheet, has seted up semicircular groove around the edge of bottom 5, is equipped with rubber seal 11 on semicircular groove, and rubber seal 11's radius equals with semicircular groove's radius, and when bottom 5 was connected with body 3, rubber seal 11 hugs closely 3 inner walls of body, and has frictional force between rubber seal 11 and the 3 inner walls of body, realizes bottom 5 and body 3's sealing connection. As shown in fig. 2, a hemp rope 12 is padded between the semicircular groove and the rubber seal ring 11 for adjusting the tightness between the rubber seal ring 11 and the inner wall of the tube 3. The diameter of the bottom cover 5 of the present embodiment is slightly smaller than the inner diameter of the tube body 3, and the diameter is equal to the inner diameter of the tube body minus the diameter of the rubber seal ring minus 1 mm. Wherein, the pipe body 3, the connecting spiral ring 4 and the bottom cover 5 of the movable plug 2 are all made of Q235B steel. The bottom cover 5 is composed of a circular sheet and a circular ring, the circular ring is convexly arranged towards the inside of the pipe body along the circumference of the bottom cover, and the semicircular groove is arranged on the outer ring of the circular ring, so that the diameter of the rubber sealing ring can be increased on the premise of ensuring that the self weight of the bottom cover 5 is smaller, the friction force between the bottom cover 5 and the inner wall of the pipe body 3 is increased, and the bottom cover is prevented from being opened after not reaching a designated position in the process of being inserted into a pile hole.

As shown in fig. 1, the inner diameter of the connection spiral ring 4 is slightly larger than the outer diameter of the pipe body 3, a clamping groove 9 is arranged on the inner wall of the connection spiral ring 4 and used for being connected with a convex edge 6 arranged on the pipe body 3, the convex edge is positioned in the clamping groove when the connection spiral ring 4 is connected with the pipe body 3, and the movable plug and the guide pipe can be detachably connected together through the connection spiral ring 4, so that the recycling of the movable plug is realized.

The construction method for carrying out secondary pouring on the cast-in-place pile by utilizing the movable plug comprises the following steps:

(1) measuring the elevation of the concrete surface by using a measuring rope, calculating the depth from the platform to the concrete surface, selecting a guide pipe with the length being larger than the depth after combined connection, connecting the guide pipes after the length of the guide pipes is ensured to be correct by retest, thoroughly removing foreign matters at the joint before connecting each section of guide pipe, coating a small amount of butter on a sealing ring at the joint, and checking whether the connection is tight after the connection is finished. Then the bottom end of the guide pipe is connected with a movable plug, and a bottom cover is covered after a small amount of butter is smeared on a sealing ring of the bottom cover. As shown in fig. 3, a marking line 13 is marked at the position where the length of the conduit is equal to the depth of the platform to the concrete surface plus 1m from the bottom of the movable plug pipe.

(2) The upper end of the conduit is sleeved with a half-moon buckle of a steel wire rope and is tightly fastened on the snap ring at the upper end of the conduit, so that the conduit is tightly held, and then the conduit is slowly lifted. After the pipe is lifted to a certain height and aligned with the pile hole, the pipe is slowly descended to be inserted into the pile hole, when the marking line of the outer wall of the pipe is level with the platform, the pipe stops descending, and at the moment, the pipe bottom is buried in the concrete by 1 m.

(3) Before the initial setting of the cast-in-place pile concrete, the concrete is poured into the guide pipe, the movable end plug pipe bottom cover is automatically opened under the impact of the poured concrete, and the secondary cast-in-place concrete is injected into the pile body by utilizing the characteristic that homogeneous fluid colloid still exists before the initial setting of the pile body concrete is easy to fuse. And inserting and pulling the concrete guide pipe up and down in an amplitude of 200mm to 300mm after the beginning of pouring, simultaneously slowly lifting the concrete guide pipe, keeping the bottom of the movable plug buried at the concrete depth of 2m, simultaneously measuring the elevation of the concrete surface, and stopping pouring when the elevation of the poured concrete surface reaches the designed elevation plus 1 m. Wherein, the grade of the cast-in-place concrete is not less than the grade of the designed pile body concrete.

(4) After the pouring construction is finished, the guide pipe is pulled out, and the connecting part of the upper part of the plug guide pipe is immediately cleaned to prevent concrete from being solidified on the guide pipe. Then the plug conduit is removed and a small amount of butter is smeared on the connecting piece and the sealing ring to ensure the good state of the connecting piece and the sealing ring. Finally, the materials are piled up and stored, and are convenient to find and use.

The utility model utilizes the sealing performance of the movable plug to isolate the internal and external environments of the concrete conduit, prevents mud from entering the poured pile body concrete, and simultaneously utilizes the working principle that the movable plug pipe bottom cover is automatically opened by the impact of the poured concrete, thereby realizing the automatic operation of removing the isolation between the pile body concrete and the newly poured concrete inside the concrete, and ensuring the forming quality of the pile body concrete; the characteristic that homogeneous fluid colloid is easy to fuse before the pile body concrete is initially set is utilized, and the secondary cast-in-place concrete is injected into the pile body, so that the pile body concrete and the secondary cast-in-place concrete are finally combined into a whole, and the aim of lengthening the pile body (wall) by the secondary cast-in-place concrete of the concrete pile body (wall) is fulfilled.

Claims (9)

1. Construction tool that bored concrete pile secondary was filled, including the pipe, its characterized in that: the end of the conduit is provided with a movable plug, the movable plug comprises a conduit body and a bottom cover, one end of the conduit body is communicated with the end of the conduit, the bottom cover is hinged to the other end of the conduit body, and the bottom cover can seal the port of the conduit body after rotating along the hinged part.

2. The work tool of claim 1, wherein: the pipe body is provided with a bottom cover limiting block, and the bottom cover limiting block is arranged on the inner wall of the pipe body opposite to the hinged part; when the end opening of the tube body is sealed by the bottom cover, the edge of the bottom cover is tightly attached to the inner wall of the tube body and is limited to the horizontal position by the bottom cover limiting block.

3. The work tool of claim 1, wherein: the movable plug further comprises a connecting spiral ring, one end of the connecting spiral ring is in threaded connection with the tail end of the guide pipe, a clamping groove is formed in the inner wall of the other end of the connecting spiral ring, and a convex edge is arranged on the outer wall of the end, communicated with the guide pipe, of the pipe body and clamped in the clamping groove.

4. The work tool of claim 3, wherein: and a connecting spiral ring limiting block is arranged on the outer wall of the pipe body.

5. The work tool of claim 1, wherein: the tube body is hinged with the bottom cover through a connecting hinge, one leaf of the connecting hinge is fixedly connected to the outer wall of the tail end of the tube body, and the other leaf is fixedly connected with the bottom cover.

6. The work tool of claim 5, wherein: the leaf sheets fixedly connected with the connecting loose-leaf and the pipe body are L-shaped.

7. The work tool of claim 2 or 5, wherein: a semicircular groove is formed around the edge of the bottom cover, and a rubber sealing ring is tightly sleeved in the semicircular groove.

8. The work tool of claim 7, wherein: hemp ropes are arranged between the bottoms of the semicircular groove grooves and the rubber sealing rings.

9. The work tool of claim 7, wherein: the bottom cover is composed of a wafer and a circular ring, the circular ring is arranged in the pipe body in a protruding mode along the circumference of the bottom cover, and a semicircular groove is formed in the outer ring of the circular ring.

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