CN111893992A - Static breaking construction method for interior of pile head of cast-in-situ bored pile - Google Patents
Static breaking construction method for interior of pile head of cast-in-situ bored pile Download PDFInfo
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- CN111893992A CN111893992A CN202010946445.4A CN202010946445A CN111893992A CN 111893992 A CN111893992 A CN 111893992A CN 202010946445 A CN202010946445 A CN 202010946445A CN 111893992 A CN111893992 A CN 111893992A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/223—Details of top sections of foundation piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a static breaking construction method for the interior of a pile head of a cast-in-situ bored pile, which comprises the following steps: step S1, bored concrete pile hole forming and reinforcement cage manufacturing; step S2, pre-burying a pipe fitting inside the pile head, installing a sleeve at the top of the reinforcement cage and lowering the reinforcement cage; step S3, concrete pouring of the solid pile; step S4, pile head excavation and pile head cleaning; step S5, cutting a pile head splitting line and pouring an expansion agent of the embedded pipe fitting; and step S6, performing static spalling inside the pile head. The construction method disclosed by the invention is simple to operate, green and environment-friendly, greatly reduces the investment of traditional pile head breaking construction manpower machines, reduces the pile head breaking amount, noise and raised dust, ensures the pile head breaking construction quality, improves the pile head breaking construction efficiency and reduces the construction cost.
Description
Technical Field
The invention relates to the field of pile head breaking of a cast-in-place pile. More specifically, the invention relates to a static breaking construction method for the interior of a pile head of a cast-in-situ bored pile.
Background
At present, for guaranteeing pile head quality, especially, the underwater cast-in-place pile fills excessive filling 800 and fills 1000mm, the excessive filling part of pile head is broken and is mainly removed by manually using an air pick, a blasting machine or a hydraulic pile cutting machine to break the pile head from the outside, and the breaking noise is large, the dust raising is large, the site requirement is large, and the efficiency is low.
Therefore, it is necessary to develop a new static removing method for the interior of the bored pile head to overcome this deficiency.
Disclosure of Invention
The invention aims to provide a static pile head breaking construction method for a cast-in-situ bored pile, which reduces the pile head manual mechanical breaking amount, noise and raised dust, is green and environment-friendly, can effectively reduce the construction cost, ensures the pile head breaking construction quality and improves the pile head breaking construction efficiency.
To achieve these objects and other advantages in accordance with the present invention, there is provided a bored pile head internal static destruction construction method, including the steps of:
step S1, bored concrete pile hole forming and reinforcement cage manufacturing
Forming a hole in the cast-in-place pile, and preparing a reinforcement cage;
s2, pre-buried pipe fitting inside the pile head, installation of sleeve at top of steel reinforcement cage and lowering of steel reinforcement cage
Coaxially arranging a pile head inner embedded pipe fitting on the reinforcement cage, wherein the pile head inner embedded pipe fitting comprises an annular hoop pipe and a plurality of vertical pipes, one ends of the vertical pipes are vertically communicated and connected with the hoop pipe, and one ends of the vertical pipes, far away from the hoop pipe, are temporarily closed; and the riser is in communication with the hoop pipe;
step S3, concrete pouring of solid pile
Placing the reinforcement cage obtained by the improvement of the second step into a cast-in-place hole, pouring concrete to place the pile top of the cast-in-place pile at an excess casting elevation to obtain the cast-in-place pile, wherein the cast-in-place pile comprises an upper pile head part and a lower solid pile part, the embedded pipe fitting in the pile head is positioned in the pile head part of the cast-in-place pile, and the bottom of the embedded pipe fitting in the pile head is close to the bottom of the pile head part of the cast-in-place pile;
step S4, pile head excavation and pile head cleaning
After the concrete reaches the designed strength, opening soil layers around the cast-in-place pile, and excavating until the pile head part of the cast-in-place pile is exposed; step S5, pile head splitting line cutting and pre-buried pipe fitting expanding agent pouring
Cutting at the division boundary of the pile head part and the solid pile part of the cast-in-place pile to form an annular pile head splitting cutting line;
releasing the temporary sealing of one end of the stand pipe far away from the hoop pipe, and filling an expanding agent into the stand pipe;
step S6, static spalling inside pile head
And standing, after the expanding agent is fully expanded, the pile head part of the cast-in-place pile is broken along the pile head splitting cutting line and the hoop pipe, the pile head part of the cast-in-place pile is separated from the solid pile part of the cast-in-place pile, and the interior of the pile head part of the cast-in-place pile is subjected to spalling along the vertical pipe.
According to a preferred embodiment of the present invention, the method for statically removing the interior of the pile head of the cast-in-situ bored pile further includes:
step S7, pile head breaking and cleaning
And finally, continuously carrying out the breaking and cleaning work on the pile head part of the broken cast-in-place pile.
According to a preferred embodiment of the invention, in the static demolition construction method for the interior of the pile head of the cast-in-situ bored pile, the hoop pipe and the riser are both made of PVC materials.
According to a preferred embodiment of the invention, in the static demolition construction method for the interior of the pile head of the cast-in-situ bored pile, the hoop pipe and the riser are communicated and connected by adopting a tee joint.
According to a preferred embodiment of the invention, in the static demolition construction method inside the pile head of the cast-in-situ bored pile, the end of the riser, which is far away from the hoop pipe, is temporarily detachably closed by a riser cap.
According to a preferred embodiment of the invention, in the construction method for statically breaking the interior of the pile head of the cast-in-situ bored pile, a pile head positioning stiffening hoop is circumferentially arranged on a reinforcement cage and is positioned at a boundary of the pile head part and a solid pile part of the cast-in-situ bored pile;
and pile body spiral stirrups are spirally arranged outside the reinforcement cage along the height direction of the reinforcement cage.
And the hoop pipe is bound and fixed on the pile head positioning stiffening hoop, so that the embedded pipe fitting in the pile head is fixed in the pile head part of the cast-in-place pile.
According to a preferred embodiment of the invention, in the construction method for statically breaking the interior of the pile head of the cast-in-situ bored pile, the pile head split cutting line, the pile top elevation of the cast-in-situ bored pile, the pile head positioning stiffening hoop and the hoop pipe are all at the same height.
According to a preferred embodiment of the present invention, in the static demolition construction method for the interior of the pile head of the cast-in-situ bored pile, in step S5, the cutting depth of the pile head split cutting line is 0.6 times the thickness of the steel reinforcement protection layer of the steel reinforcement cage.
According to a preferred embodiment of the invention, in the static demolition construction method for the interior of the pile head of the cast-in-situ bored pile, an overflow port is arranged on the riser, and when an expanding agent flows out from the overflow port, an embedded pipe fitting in the pile head is filled with the expanding agent.
According to a preferred embodiment of the present invention, in the construction method for statically removing the interior of the pile head of the cast-in-situ bored pile, the step S2 further includes sleeving a top sleeve of the reinforcement cage on each reinforcement of the pile head portion of the reinforcement cage, and temporarily closing the top of the top sleeve of the reinforcement cage.
The invention at least comprises the following beneficial effects: the construction method disclosed by the invention has the advantages that the pile head is broken by utilizing the embedded pipe fitting in the pile head with a simple structure, the operation is simple, the environment is protected, the investment of a traditional pile head breaking construction manpower machine is greatly reduced, the pile head breaking amount, the noise and the dust are reduced, the pile head breaking construction quality is ensured, the pile head breaking construction efficiency is improved, and the construction cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a construction diagram of a static demolition construction method for the interior of a pile head of a cast-in-situ bored pile according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of the embedded pipe in the pile head in the above embodiment.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
As shown in fig. 1-2, the static internal demolition construction method for the bored pile head of the present invention includes the following steps:
step S1, bored concrete pile hole forming and reinforcement cage manufacturing
Implementing bored concrete pile hole forming and reinforcement cage manufacturing according to the bored concrete pile design file and the construction scheme to obtain a bored concrete hole and a reinforcement cage; s2, pre-buried pipe fitting inside the pile head, installation of sleeve at top of steel reinforcement cage and lowering of steel reinforcement cage
Coaxially arranging a pile head internal embedded pipe fitting 1 on the reinforcement cage 2, wherein the bottom of the pile head internal embedded pipe fitting 1 is located at a pile head breaking interface (a boundary between a pile head part and a solid pile part of the cast-in-place pile), as shown in fig. 2, the pile head internal embedded pipe fitting 1 comprises an annular hoop pipe 110 and a plurality of vertical pipes 120 with one ends vertically communicated and connected to the hoop pipe 110, and one ends of the vertical pipes 120 far away from the hoop pipe 110 are temporarily sealed by using a vertical pipe cap 130; the hoop pipe 110 and the riser 120 are connected in communication by a tee joint 140. Hoop pipe 110 is the inside vertical static main part that breaks of pile head, can adopt market standard PVC pipe, also can customize and adopt PVC square pipe to increase the inside area of accepting that breaks of pile head, if adopt the pipe, then hoop pipe 110 excircle diameter is the same with the interior circle diameter of pile head location hoop. The three-way joint 140 is a key component of the hoop-connected pipe 110 and the vertical pipe 120, the size of the joint is matched with the size of the hoop-connected pipe 110 and the vertical pipe 120, and the joint is coated with connection glue during connection, so that stable and sealed connection is ensured. The three-way joint 140 is a pipe fitting for pouring a strong expanding agent into the channel and breaking the pile head by radial expansion when the pile head is broken. The height of the vertical pipe 120 is 100mm higher than the pile head super-grouting concrete surface. The riser cap 130 is a sealing measure for the upper port of the riser 120, so that concrete is prevented from entering the pre-embedded pipe fitting 1 inside the pile head of the cast-in-situ bored pile, and the effects of later-stage strong expanding agent pouring and internal static breaking are influenced.
In the above embodiment, a pile head positioning stiffening hoop 5 may be circumferentially installed on the reinforcement cage 2, and is located at a boundary between a pile head part and a solid pile part of the cast-in-place pile; and a pile body spiral stirrup 7 is spirally arranged outside the steel reinforcement cage along the height direction of the steel reinforcement cage. The hoop pipe 110 is bound and fixed on the pile head positioning stiffening hoop 5, so that the embedded pipe fitting 1 in the pile head is fixed at the bottom of the pile head part of the cast-in-place pile. In the step S1, it is important to ensure that the pile head positioning stiffening hoops 5 and the pile body spiral stirrups 7 are installed at accurate positions, so as to provide a guarantee for the subsequent static removal of the interior of the pile head.
The top sleeve 3 of the reinforcement cage is sleeved on each steel bar of the pile head part of the reinforcement cage, and the top sleeve of the reinforcement cage is temporarily sealed by a main reinforcement sleeve cap 320. The lower part of the sleeve 3 at the top of the reinforcement cage is fixed on the steel bars of the pile head part of the reinforcement cage in a sealing mode through a rubber ring. The pile head is inside pre-buried pipe fitting 1 after the reinforcing cage top sleeve 3 finishes the installation, the reinforcing cage is transferred to the pile hole and the position is established and fixed.
Step S3, concrete pouring of solid pile
And (3) putting the reinforcement cage obtained by the improvement of the step two into a pouring hole, fixing, putting a concrete pouring guide pipe, clearing the bottom, pouring concrete, putting the pile top of the pouring pile at a super-pouring elevation to obtain the pouring pile, strictly controlling the insertion and the swing of the concrete pouring guide pipe in the process of putting the concrete pouring guide pipe and pouring the concrete, and preventing the collision damage to the embedded pipe fitting structure 1 in the pile head to cause the failure of the pouring of the subsequent expanding agent and influence the internal static removing effect.
The cast-in-place pile comprises an upper pile head part and a lower solid pile part, wherein the embedded pipe fitting 1 in the pile head is positioned in the pile head part of the cast-in-place pile, and the bottom of the embedded pipe fitting 1 in the pile head is close to the bottom of the pile head part of the cast-in-place pile; as shown in fig. 1, the pile head part is above the pile head positioning stiffening hoop 5, and the solid pile part is below the pile head positioning stiffening hoop 5.
Step S4, pile head excavation and pile head cleaning
After the concrete reaches the designed strength, opening soil layers around the cast-in-place pile, excavating until the pile head part of the cast-in-place pile is exposed, and marking a pile top line at the designed pile top elevation of the cast-in-place pile; in the process, soil layers near the pile head part are manually cleaned, so that the problem that subsequent expanding agents are failed to fill due to the fact that exposed vertical pipes 120 are filled with damaged soil is avoided, and the internal static breaking effect is influenced.
Step S5, pile head splitting line cutting and pre-buried pipe fitting expanding agent pouring
Cutting to form an annular pile head splitting cutting line at the division boundary of the pile head part and the solid pile part of the cast-in-place pile, namely the elevation of the pile top;
releasing the temporary closure of the end of the riser 120 remote from the hoop pipe 110, i.e. removing the riser cap 130, and filling the riser 120 with an expanding agent; can use handheld syringe to pour into, guarantee that the inside pre-buried pipe fitting of pile head constructs 1 inside and fills fully. The riser 120 is provided with an overflow port, and when the expansion agent flows out from the overflow port, it indicates that the pre-buried pipe fitting 1 in the pile head is filled with the expansion agent. In order to ensure that no foreign matter exists in the embedded pipe fitting 1 inside the pile head during pouring, a high-pressure air gun can be used for purging the interior of the embedded pipe fitting before pouring.
Step S6, static spalling inside pile head
And standing, generally standing for 24 hours, after the expanding agent is fully expanded, the pile head part of the cast-in-place pile is broken along the pile head splitting cutting line and the hoop pipe 110, so that the pile head part of the cast-in-place pile is separated from the solid pile part of the cast-in-place pile, and the interior of the pile head part of the cast-in-place pile is burst along the riser 120.
According to a preferred embodiment of the present invention, the method for statically removing the interior of the pile head of the cast-in-situ bored pile further includes:
step S7, pile head breaking and cleaning
And finally, continuously carrying out the breaking and cleaning work on the pile head part of the broken cast-in-place pile.
According to a preferred embodiment of the present invention, in the static demolition construction method for the interior of the bored pile head, the hoop pipe 110 and the riser pipe 120 are made of PVC, have certain strength, and can be cracked under the expansion force of the expansion agent.
According to a preferred embodiment of the present invention, in the static demolition construction method for the interior of the pile head of the cast-in-situ bored pile, the pile head split cutting line, the pile top elevation of the cast-in-situ bored pile, the pile head positioning stiffening hoop 5, and the hoop pipe 110 are all at the same height.
According to a preferred embodiment of the present invention, in the static demolition construction method for the interior of the pile head of the cast-in-situ bored pile, in step S5, the cutting depth of the pile head split cutting line is 0.6 times the thickness of the steel reinforcement protection layer of the steel reinforcement cage.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A static construction method for breaking the interior of a pile head of a bored pile is characterized by comprising the following steps:
step S1, bored concrete pile hole forming and reinforcement cage manufacturing
Forming a hole in the cast-in-place pile, and preparing a reinforcement cage;
s2, pre-buried pipe fitting inside the pile head, installation of sleeve at top of steel reinforcement cage and lowering of steel reinforcement cage
Coaxially arranging a pile head internal embedded pipe fitting on the reinforcement cage, wherein the pile head internal embedded pipe fitting comprises an annular hoop pipe and a plurality of stand pipes, one ends of the stand pipes are vertically communicated and connected with the hoop pipe, one ends of the stand pipes, far away from the hoop pipe, are temporarily closed, and the stand pipes are communicated with the hoop pipe;
step S3, concrete pouring of solid pile
Placing the reinforcement cage obtained by the improvement of the second step into a cast-in-place hole, pouring concrete to place the pile top of the cast-in-place pile at an excess casting elevation to obtain the cast-in-place pile, wherein the cast-in-place pile comprises an upper pile head part and a lower solid pile part, the embedded pipe fitting in the pile head is positioned in the pile head part of the cast-in-place pile, and the bottom of the embedded pipe fitting in the pile head is close to the bottom of the pile head part of the cast-in-place pile;
step S4, pile head excavation and pile head cleaning
After the concrete reaches the designed strength, opening soil layers around the cast-in-place pile, and excavating until the pile head part of the cast-in-place pile is exposed;
step S5, pile head splitting line cutting and pre-buried pipe fitting expanding agent pouring
Cutting at the division boundary of the pile head part and the solid pile part of the cast-in-place pile to form an annular pile head splitting cutting line;
releasing the temporary sealing of one end of the stand pipe far away from the hoop pipe, and filling an expanding agent into the stand pipe;
step S6, static spalling inside pile head
And standing, after the expanding agent is fully expanded, the pile head part of the cast-in-place pile is broken along the pile head splitting cutting line and the hoop pipe, the pile head part of the cast-in-place pile is separated from the solid pile part of the cast-in-place pile, and the interior of the pile head part of the cast-in-place pile is subjected to spalling along the vertical pipe.
2. The method for static interior demolition construction of a bored pile head according to claim 1, further comprising:
step S7, pile head breaking and cleaning
And finally, continuously carrying out the breaking and cleaning work on the pile head part of the broken cast-in-place pile.
3. The method for static internal demolition construction of a bored pile head according to claim 1, wherein the hoop tube and the riser are made of PVC material.
4. The method for static internal demolition construction of a pile head of a bored pile according to claim 1, wherein the hoop pipe and the riser pipe are connected in communication by a tee joint.
5. The method for static inside demolition construction of a pile head of a bored pile according to claim 1, wherein the end of the riser remote from the hoop pipe is temporarily detachably closed by a riser cap.
6. The method for static interior demolition construction of a pile head of a bored pile according to claim 1, wherein a pile head positioning reinforcing hoop is installed circumferentially on a reinforcement cage and located at a boundary between a pile head portion and a solid pile portion of the bored pile;
and pile body spiral stirrups are spirally arranged outside the reinforcement cage along the height direction of the reinforcement cage.
And the hoop pipe is bound and fixed on the pile head positioning stiffening hoop, so that the embedded pipe fitting in the pile head is fixed in the pile head part of the cast-in-place pile.
7. The method of claim 1, wherein the split cutting line of the pile head, the elevation of the pile top of the cast-in-place pile, the positioning and stiffening hoop of the pile head and the hoop pipe are all at the same height.
8. The method of claim 1, wherein in step S5, the depth of cut of the split cutting line is 0.6 times the thickness of the steel bar protection layer of the steel bar cage.
9. The static internal breaking construction method for the pile head of the cast-in-situ bored pile according to claim 1, wherein an overflow port is formed in the riser, and when an expanding agent flows out from the overflow port, the pre-buried pipe fitting in the pile head is filled with the expanding agent.
10. The method of claim 1, wherein the step S2 further comprises sleeving a top sleeve of the reinforcement cage on each reinforcement of the pile head portion of the reinforcement cage, and temporarily closing the top of the top sleeve of the reinforcement cage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010946445.4A CN111893992A (en) | 2020-09-10 | 2020-09-10 | Static breaking construction method for interior of pile head of cast-in-situ bored pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010946445.4A CN111893992A (en) | 2020-09-10 | 2020-09-10 | Static breaking construction method for interior of pile head of cast-in-situ bored pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463634A (en) * | 2021-09-03 | 2021-10-01 | 南通中舟风电工程技术有限公司 | Silencing device of marine hydraulic pile hammer |
| CN114319325A (en) * | 2022-02-21 | 2022-04-12 | 大连海事大学 | Bored concrete pile head reinforcing bar protective case |
| CN114383331A (en) * | 2021-12-21 | 2022-04-22 | 中国矿业大学 | Cage type energy pile pipe-laying heat exchanger structure |
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2020
- 2020-09-10 CN CN202010946445.4A patent/CN111893992A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463634A (en) * | 2021-09-03 | 2021-10-01 | 南通中舟风电工程技术有限公司 | Silencing device of marine hydraulic pile hammer |
| CN113463634B (en) * | 2021-09-03 | 2021-11-26 | 南通中舟风电工程技术有限公司 | Silencing device of marine hydraulic pile hammer |
| CN114383331A (en) * | 2021-12-21 | 2022-04-22 | 中国矿业大学 | Cage type energy pile pipe-laying heat exchanger structure |
| CN114319325A (en) * | 2022-02-21 | 2022-04-12 | 大连海事大学 | Bored concrete pile head reinforcing bar protective case |
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