CN111395339A - Mounting structure and mounting method for accurately embedding cast-in-situ bored pile casing - Google Patents

Mounting structure and mounting method for accurately embedding cast-in-situ bored pile casing Download PDF

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Publication number
CN111395339A
CN111395339A CN202010206572.0A CN202010206572A CN111395339A CN 111395339 A CN111395339 A CN 111395339A CN 202010206572 A CN202010206572 A CN 202010206572A CN 111395339 A CN111395339 A CN 111395339A
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CN
China
Prior art keywords
pile casing
pile
casing
target
horizontal
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Pending
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CN202010206572.0A
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Chinese (zh)
Inventor
蒋凯
张年丰
方三陵
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China First Metallurgical Group Co Ltd
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China First Metallurgical Group Co Ltd
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Priority to CN202010206572.0A priority Critical patent/CN111395339A/en
Publication of CN111395339A publication Critical patent/CN111395339A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/04Guide devices; Guide frames
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/06Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers for observation while placing

Abstract

The invention discloses an installation structure and an installation method for accurately embedding a cast-in-situ bored pile casing, which comprise the following steps: protect a section of thick bamboo, it is provided with a plurality of rings to protect a section of thick bamboo top, rings are connected with the lifting rope, the lifting rope other end is connected with the jack-up couple, it is connected with a plurality of horizontal cables to protect a section of thick bamboo lateral wall, the horizontal cable other end passes through the earth anchor to be fixed subaerial in the foundation ditch outside, and it is not high to solve among the prior art and protect a section of thick bamboo location accuracy to can not carry out the technical problem who monitors in the trouble.

Description

Mounting structure and mounting method for accurately embedding cast-in-situ bored pile casing
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to an installation structure and an installation method for accurately embedding a cast-in-situ bored pile casing.
Background
At present, a pile casing is buried and generally firstly lofted on the ground to form a pile position central point, then a foundation pit is excavated, then the central point is discharged at the bottom of the foundation pit (or the pile casings are lofted at the periphery of the foundation pit before excavation), a crane is used for lifting the pile casing and lowering the pile casing to the foundation pit for burying, and workers push and pull the pile casing according to the central point position or the peripheral pile casing at the bottom of the foundation pit in the lowering process so that the center of the pile casing coincides with the center of the pile position. Because manual operation completely depends on experience level of workers, and because the height of the pile casing is higher (1.5-3 m), the sight of the workers can be shielded in the process of lowering, and the burying precision is difficult to guarantee. Embedding of traditional drill front protective cylinder
In addition, some units can adopt tools such as some inspection rulers for inspecting the position of the pile casing to inspect the position of the pile casing, the tools still need surveying and mapping instruments such as a total station to loft out the pile position, and the tools and the methods can only inspect the positioning accuracy, namely, the tools and the methods are biased to post inspection and have no substantial effect on how to improve the accuracy in the embedding process.
Disclosure of Invention
The invention aims to provide an installation structure and an installation method for accurately embedding a cast-in-situ bored pile casing, and solves the technical problems that the casing positioning accuracy is not high and monitoring cannot be carried out in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an accurate mounting structure who buries bored concrete pile casing underground, includes: the protective sleeve comprises a protective sleeve body, wherein a plurality of hanging rings are arranged at the top of the protective sleeve body, the hanging rings are connected with hanging ropes, the other ends of the hanging ropes are connected with hoisting hooks, the side wall of the protective sleeve body is connected with a plurality of horizontal inhaul cables, and the other ends of the horizontal inhaul cables are fixed on the ground outside a foundation pit through ground anchors.
According to the mounting structure for accurately embedding the cast-in-situ bored pile casing, the tightener is arranged on the horizontal inhaul cable.
According to the mounting structure for the protective cylinder of the accurately-buried cast-in-situ bored pile, the top of the protective cylinder is provided with the target seat, the target is arranged on the target seat, and the mounting center of the target is coincided with the center of the protective cylinder.
The invention relates to an installation structure for accurately embedding a cast-in-situ bored pile casing, wherein a target is dynamically monitored by a total station.
According to the mounting structure for accurately embedding the cast-in-situ bored pile casing, 4 horizontal inhaul cables are uniformly distributed on the circumferential outer side of the casing.
An installation method of an installation structure for accurately embedding a cast-in-situ bored pile casing comprises the following steps:
s1, leveling the field, and lofting out the center point of the pile foundation;
s2, excavating the foundation pit, and lofting the center point of the foundation pit at the bottom of the foundation pit;
s3, arranging ground anchors at the periphery of the foundation pit, and erecting a total station to adjust the total station to a lofting direction;
s4, preparing a pile casing, mounting a lifting ring and a lifting rope on the top of the pile casing, and connecting the lifting rope with a lifting hook;
s5, hoisting the pile casing by using hoisting equipment, and connecting a horizontal inhaul cable on the ground anchor with the outer side of the pile casing when the pile casing is hoisted by using the hoisting equipment and is lowered to a position close to the foundation pit;
s6, mounting a target seat on the top of the pile casing to enable the center of a target on the target seat to coincide with the center of the pile casing;
s7, adjusting the tightener to enable the target to coincide with the lofting center of the foundation pit, and achieving accurate positioning and placement of the pile casing;
s8, earth backfilling, wherein the pile casing is dynamically monitored not to deviate in the backfilling process, and after backfilling is finished, a lifting rope and a horizontal inhaul cable are taken down;
and S9, repeating the steps S4-S8 until all the casings are embedded.
According to the installation method of the installation structure for accurately embedding the cast-in-situ bored pile casing, the bottom surface of the foundation pit is 200-300cm deeper than the bottom of the casing to be embedded.
According to the mounting method of the mounting structure for accurately embedding the cast-in-situ bored pile casing, the total station monitors the horizontal angle and the horizontal distance of the target.
The invention has the following beneficial effects: the invention designs an installation structure and an installation method of a pile casing of an accurately embedded cast-in-situ bored pile, which are characterized in that ground anchors are arranged in four directions around a foundation pit of the pile casing and are connected with the pile casing through tighteners, so that the position of the pile casing is accurately adjusted and fixed, a target is arranged above the pile casing, a target installation hole is arranged at the center of a target base, the center of the target is coincided with the center of the pile casing by measuring the distance between the target installation hole and the four walls of the pile casing, and the dynamic observation of the center position of the pile casing is realized by utilizing the orientation and ranging functions of a total station, so that the method capable of quickly and accurately adjusting the position of the pile casing is provided, has good adaptability, can meet the pile foundation construction requirements under different pile diameters and terrain conditions, and is simple and easy to understand, and the used tools have universality. The most common tools in engineering are adopted, a simple plane tension principle is adopted, the direction and distance positioning is carried out by using the total station which is necessary in various constructions, the embedding precision of the pile casing is improved to be within +/-1 cm, and the working efficiency and the pile foundation positioning precision are greatly improved while the investment is not increased.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, an installation structure for accurately embedding a casing of a cast-in-situ bored pile includes: protect a 1, it is provided with a plurality of rings 2 to protect 1 top of a section of thick bamboo, rings 2 are connected with lifting rope 3, the 3 other ends of lifting rope are connected with jack-up couple 4, it is connected with a plurality of horizontal cable 5 to protect 1 lateral wall of a section of thick bamboo, the horizontal cable 5 other end passes through the earth anchor 7 to be fixed subaerial in the foundation ditch 10 outside.
In a preferred embodiment of the present invention, a tightener 6 is disposed on the horizontal pulling cable 5.
In the preferred embodiment of the invention, a target seat 8 is arranged at the top of the casing 1, a target 9 is arranged on the target seat 8, and the installation center of the target 9 is coincided with the center of the casing 1.
In a preferred embodiment of the invention, said target 9 is dynamically monitored by means of a total station.
In a preferred embodiment of the invention, the number of the horizontal pulling cables 5 is 4, and the horizontal pulling cables are uniformly distributed on the circumferential outer side of the casing 1.
An installation method of an installation structure for accurately embedding a cast-in-situ bored pile casing comprises the following steps:
s1, leveling the field, and lofting out the center point of the pile foundation;
s2, excavating the foundation pit 10, and lofting the center point of the foundation pit 10 at the bottom of the foundation pit 10;
s3, arranging ground anchors 7 on the periphery of the foundation pit 10, and erecting a total station instrument to adjust the total station instrument to a lofting direction;
s4, preparing a pile casing 1, installing a lifting ring 2 and a lifting rope 3 at the top of the pile casing 1, and connecting the lifting rope 3 with a lifting hook 4;
s5, hoisting the pile casing 1, so that the pile casing 1 is hoisted by hoisting equipment and is lowered to a position close to the foundation pit 10, and the horizontal stay cable 5 on the ground anchor 7 is connected with the outer side of the pile casing 1;
s6, mounting a target seat 8 on the top of the pile casing 1, and enabling the center of a target 9 on the target seat 8 to coincide with the center of the pile casing 1;
s7, adjusting the wire tightener 6 to enable the target 9 to coincide with the lofting center of the foundation pit 10, and realizing accurate positioning and placement of the pile casing 1;
s8, earth backfilling, wherein the pile casing 1 is dynamically monitored not to deviate in the backfilling process, and after backfilling is finished, the lifting rope 3 and the horizontal inhaul cable 5 are taken down;
and S9, repeating the steps S4-S8 until all the casings 1 are embedded.
In the preferred embodiment of the invention, the bottom surface of the foundation pit 10 is 200-300cm deeper than the bottom of the pile casing 1 to be embedded.
In a preferred embodiment of the invention, the total station monitors the horizontal angle and horizontal distance of the target 9.
The working principle is as follows:
four ground anchors 7 are arranged in four directions of the protective cylinder 1 and are connected with the protective cylinder 1 through the wire tighteners 6, the movement of the protective cylinder 1 in the four directions is realized by adjusting the tightness of the wire tighteners 6, the center of the target 9 at the upper part is superposed with the center of the protective cylinder 1, in the centering process, the target 9 faces to the erection direction of the total station, the coordinates of the center point of the pile foundation are input when the total station is erected, namely, a lofting angle and a lofting distance are generated, the total station rotates to the lofting angle to open an infrared function, most total stations have the function, if not, the infrared point is coincided with the center point of the target 9 by adjusting the wire grip 6 in a manual observation mode, namely, the angle centering is realized, then the total station is used for ranging, the horizontal distance is equal to the calculated distance through the adjusted wire grip 6, thus realizing longitudinal centering and immediately finishing accurate centering of the center of the casing 1 and the center of the pile foundation.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: the invention designs an installation structure and an installation method of a pile casing of an accurately embedded cast-in-situ bored pile, which are characterized in that ground anchors are arranged in four directions around a foundation pit of the pile casing and are connected with the pile casing through tighteners, so that the position of the pile casing is accurately adjusted and fixed, a target is arranged above the pile casing, a target installation hole is arranged at the center of a target base, the center of the target is coincided with the center of the pile casing by measuring the distance between the target installation hole and the four walls of the pile casing, and the dynamic observation of the center position of the pile casing is realized by utilizing the orientation and ranging functions of a total station, so that the method capable of quickly and accurately adjusting the position of the pile casing is provided, has good adaptability, can meet the pile foundation construction requirements under different pile diameters and terrain conditions, and is simple and easy to understand, and the used tools have universality. The most common tools in engineering are adopted, a simple plane tension principle is adopted, the direction and distance positioning is carried out by using the total station which is necessary in various constructions, the embedding precision of the pile casing is improved to be within +/-1 cm, and the working efficiency and the pile foundation positioning precision are greatly improved while the investment is not increased.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (8)

1. The utility model provides an accurate mounting structure who buries bored concrete pile casing underground which characterized in that includes: protect a section of thick bamboo (1), it is provided with a plurality of rings (2) to protect a section of thick bamboo (1) top, rings (2) are connected with lifting rope (3), the lifting rope (3) other end is connected with jack-up couple (4), it is connected with a plurality of horizontal cable (5) to protect a section of thick bamboo (1) lateral wall, the subaerial in foundation ditch (10) outside is fixed through earth anchor (7) to horizontal cable (5) other end.
2. A mounting structure for a pile casing for a precisely embedded cast-in-situ pile according to claim 1, wherein said horizontal stay (5) is provided with a wire grip (6).
3. A mounting structure of a pile casing for accurately burying cast-in-situ pile according to claim 1, wherein a target seat (8) is arranged at the top of the pile casing (1), a target (9) is arranged on the target seat (8), and the mounting center of the target (9) is coincident with the center of the pile casing (1).
4. An installation structure for accurately burying a cast-in-situ pile casing according to claim 1, wherein said target (9) is dynamically monitored by a total station.
5. A mounting structure for a pile casing of a precisely-buried bored pile according to claim 1, wherein the number of said horizontal cables (5) is 4, and said horizontal cables are uniformly distributed on the circumferential outer side of the casing (1).
6. The mounting method of the mounting structure for accurately embedding the cast-in-situ bored pile casing is characterized by comprising the following steps of:
s1, leveling the field, and lofting out the center point of the pile foundation;
s2, excavating the foundation pit (10), and lofting the center point of the foundation pit (10) at the bottom of the foundation pit (10);
s3, arranging ground anchors (7) on the periphery of the foundation pit (10), and erecting a total station to adjust the total station to a lofting direction;
s4, preparing a pile casing (1), installing a lifting ring (2) and a lifting rope (3) at the top of the pile casing (1), and connecting the lifting rope (3) with a lifting hook (4);
s5, hoisting the pile casing (1), so that the pile casing (1) is hoisted by hoisting equipment and is lowered to a position close to the foundation pit (10), and a horizontal stay cable (5) on the ground anchor (7) is connected with the outer side of the pile casing (1);
s6, mounting a target seat (8) at the top of the pile casing (1) to enable the center of a target (9) on the target seat (8) to coincide with the center of the pile casing (1);
s7, adjusting the tightener (6) to enable the target (9) to coincide with the lofting center of the foundation pit (10), so that the pile casing (1) is accurately positioned and placed;
s8, earth backfilling, wherein the pile casing (1) is dynamically monitored not to deviate in the backfilling process, and after backfilling is finished, the lifting rope (3) and the horizontal inhaul cable (5) are taken down;
and S9, repeating the steps S4-S8 until all the casings (1) are embedded.
7. The method for installing the installation structure for the accurately-buried bored pile casing according to claim 6, wherein the bottom surface of the foundation pit (10) is 200 and 300cm deeper than the bottom of the casing (1) to be buried.
8. The method of installing an installation structure for accurately burying a cast-in-situ pile casing as claimed in claim 6, wherein said total station monitors horizontal angle and horizontal distance of target (9).
CN202010206572.0A 2020-03-23 2020-03-23 Mounting structure and mounting method for accurately embedding cast-in-situ bored pile casing Pending CN111395339A (en)

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CN202010206572.0A CN111395339A (en) 2020-03-23 2020-03-23 Mounting structure and mounting method for accurately embedding cast-in-situ bored pile casing

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CN113136855A (en) * 2021-04-27 2021-07-20 福建省亿方建设工程有限公司 Sand filling instrument for detecting large-thickness wide-width water stable layer and construction method thereof

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