阅读说明：本技术 深厚软土管桩施工方法 (Construction method of deep soft soil pipe pile ) 是由 穆永超 刘彦 孙欢欢 冯满霞 杨钧宴 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种深厚软土管桩施工方法,包括以下步骤：S1、制桩：单节桩长度均为8～12米,且下节桩身内径大于上节桩身外径；所述桩身的上端内壁设置有水平承台,所述承台上表面具有向内凹陷的槽口；S2、打桩：使用全站仪对桩位点放样,通过打桩机将桩身打入设计位置,若桩身垂直度偏差在1％以上,则校正桩身后再进行打桩；S3、接桩：将上节桩身吊装安装至下节桩身,保证上节桩身的槽台插入下节桩身的槽口,上节桩身下端的外壁与下节桩身上端的内壁之间形成一空腔,下节桩身的上端和上节桩身的下端通过连接件衔接,并注入防腐蚀浆料。本发明实现了接头的防腐蚀施工。(The invention discloses a construction method of a deep soft soil pipe pile, which comprises the following steps: s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body is larger than the outer diameter of the upper-section pile body; a horizontal bearing platform is arranged on the inner wall of the upper end of the pile body, and an inward-concave notch is formed in the upper surface of the bearing platform; s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile; s3, pile splicing: the upper pile body is hoisted and installed to the lower pile body, a groove platform of the upper pile body is ensured to be inserted into a groove opening of the lower pile body, a cavity is formed between the outer wall of the lower end of the upper pile body and the inner wall of the upper end of the lower pile body, the upper end of the lower pile body is connected with the lower end of the upper pile body through a connecting piece, and anti-corrosion slurry is injected. The invention realizes the anti-corrosion construction of the joint.)

1. A construction method of a deep soft soil pipe pile is characterized by comprising the following steps:

s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body is larger than the outer diameter of the upper-section pile body; a horizontal bearing platform is arranged on the inner wall of the upper end of the pile body, an inward-concave notch is formed in the upper surface of the bearing platform, and a metal welding plate is embedded in the outer wall of the upper end of the pile body; the bottom ends of all the pile bodies except the lowest pile body are provided with convex groove tables, the groove tables of the upper pile body are arranged to be capable of being inserted into the groove openings of the lower pile body, and the outer wall of the lower end of each pile body is embedded with a metal welding plate;

s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile;

s3, pile splicing: the upper pile body is hoisted and mounted to the lower pile body, a groove platform of the upper pile body is ensured to be inserted into a groove opening of the lower pile body, a cavity is formed between the outer wall of the lower end of the upper pile body and the inner wall of the upper end of the lower pile body, the upper end of the lower pile body is connected with the lower end of the upper pile body through a connecting piece, and anti-corrosion slurry is injected;

the connector includes: the grouting hard pipe comprises a vertical plate, a first transverse plate, a second transverse plate and a grouting hard pipe, wherein the vertical plate is arranged around the outer wall of a lower pile body in a surrounding mode, the top end of the vertical plate is higher than the top surface of the lower pile body, the top end of the vertical plate is connected with the first transverse plate into a whole, the first transverse plate extends to a metal welding plate at the lower end of the upper pile body, the second transverse plate is located right below the first transverse plate, one end of the second transverse plate is connected with the vertical plate into a whole, the other end of the second transverse plate extends to be in contact with the outer wall of an upper pile body, the lower end of the grouting hard pipe sequentially penetrates through the first transverse plate and the second transverse plate to enter the cavity, and the grouting hard pipe is in threaded connection with the first transverse plate and the second transverse plate;

the concrete steps of connecting the upper end of the lower pile body and the lower end of the upper pile body through a connecting piece and injecting anti-corrosion slurry are as follows: the connecting piece penetrates through the outer wall of the upper pile body, the second transverse plate is supported through the top surface of the lower pile body, the first transverse plate and the metal welding plate at the lower end of the upper pile body are welded, the vertical plate and the metal welding plate at the upper end of the lower pile body are welded, anti-corrosion slurry is synchronously injected into the cavity through the grouting hard pipe during welding, and after the cavity is filled with the anti-corrosion slurry, the grouting hard pipe is rotated to enable the grouting hard pipe to reach the bottom of the cavity.

And S4, continuously piling the pile foundation after pile splicing is finished through the pile driver, and repeating the steps S3 and S4 until the pile foundation reaches the design depth.

2. The deep soft soil pipe pile construction method of claim 1, wherein the wall thickness of the pile body of a single-section pile is 90-120 mm.

3. The method for constructing a deep soft soil pipe pile according to claim 1, wherein the bearing platform and the pile body are integrally cast.

4. The method for constructing a deep soft soil pipe pile according to claim 1, wherein a layer of self-adhesive glue is coated in the notch.

5. The method of claim 1, wherein in step S2, a pile tip is fixed to the bottom end face of the lowermost pile body before piling.

6. The method for constructing a deep soft soil pipe pile according to claim 1, wherein the distance between the horizontal bearing platform and the top surface of the lower pile body is 60-90 cm.

7. The deep soft soil pipe pile construction method according to claim 1, wherein a plurality of grouting hard pipes are arranged along the circumferential direction of the connecting piece.

Technical Field

The invention relates to the field of bottle washing machines. More specifically, the invention relates to a construction method of a deep soft soil pipe pile.

Background

At present, the design of building engineering pile foundation adopts prestressed high-strength concrete pipe piles more and more common. But the prestressed high-strength concrete pipe pile often meets the problems of joint rust prevention, excavation deformation and other related engineering problems in deep soft soil stratum. The construction process for the tubular pile in the deep soft soil layer is provided by combining the existing tubular pile project in the deep soft soil region and analyzing and researching the related problems encountered in the tubular pile construction.

Disclosure of Invention

To achieve these objects and other advantages in accordance with the present invention, there is provided a deep soft soil pipe pile construction method, comprising the steps of:

s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body is larger than the outer diameter of the upper-section pile body; a horizontal bearing platform is arranged on the inner wall of the upper end of the pile body, an inward-concave notch is formed in the upper surface of the bearing platform, and a metal welding plate is embedded in the outer wall of the upper end of the pile body; the bottom ends of all the pile bodies except the lowest pile body are provided with convex groove tables, the groove tables of the upper pile body are arranged to be capable of being inserted into the groove openings of the lower pile body, and the outer wall of the lower end of each pile body is embedded with a metal welding plate;

s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile;

s3, pile splicing: the upper pile body is hoisted and mounted to the lower pile body, a groove platform of the upper pile body is ensured to be inserted into a groove opening of the lower pile body, a cavity is formed between the outer wall of the lower end of the upper pile body and the inner wall of the upper end of the lower pile body, the upper end of the lower pile body is connected with the lower end of the upper pile body through a connecting piece, and anti-corrosion slurry is injected;

the connector includes: the grouting hard pipe comprises a vertical plate, a first transverse plate, a second transverse plate and a grouting hard pipe, wherein the vertical plate is arranged around the outer wall of a lower pile body in a surrounding mode, the top end of the vertical plate is higher than the top surface of the lower pile body, the top end of the vertical plate is connected with the first transverse plate into a whole, the first transverse plate extends to a metal welding plate at the lower end of the upper pile body, the second transverse plate is located right below the first transverse plate, one end of the second transverse plate is connected with the vertical plate into a whole, the other end of the second transverse plate extends to be in contact with the outer wall of an upper pile body, the lower end of the grouting hard pipe sequentially penetrates through the first transverse plate and the second transverse plate to enter the cavity, and the grouting hard pipe is in threaded connection with the first transverse plate and the second transverse plate;

the concrete steps of connecting the upper end of the lower pile body and the lower end of the upper pile body through a connecting piece and injecting anti-corrosion slurry are as follows: the connecting piece penetrates through the outer wall of the upper pile body, the second transverse plate is supported through the top surface of the lower pile body, the first transverse plate and the metal welding plate at the lower end of the upper pile body are welded, the vertical plate and the metal welding plate at the upper end of the lower pile body are welded, anti-corrosion slurry is synchronously injected into the cavity through the grouting hard pipe during welding, and after the cavity is filled with the anti-corrosion slurry, the grouting hard pipe is rotated to enable the grouting hard pipe to reach the bottom of the cavity.

And S4, continuously piling the pile foundation after pile splicing is finished through the pile driver, and repeating the steps S3 and S4 until the pile foundation reaches the design depth.

Preferably, the wall thickness of the pile body of the single-section pile is 90-120 mm.

Preferably, the bearing platform and the pile body are integrally cast.

Preferably, a layer of self-adhesive glue is coated in the notch.

Preferably, in step S2, a pile tip is fixed to the bottom end surface of the lowermost pile shaft before pile driving.

Preferably, the distance between the horizontal bearing platform and the top surface of the lower pile body is 60-90 cm.

Preferably, a plurality of grouting hard pipes are arranged along the circumferential direction of the connecting piece.

The invention at least comprises the following beneficial effects: the invention is applied to the deep soft soil environment, the joints of the upper pile body and the lower pile body are particularly easy to corrode, and the performance of the pile foundation is influenced, so that the pile foundation is designed to be that the diameter between single pile foundations is gradually reduced from bottom to top, the cavity between two pile foundations with different diameters is filled with anti-corrosion slurry, and the anti-corrosion construction of the pile foundation joint is realized through the sealing of the connecting plate.

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 schematic view of the connection of two pile foundations of the present invention;

fig. 2 is a detail view of the joint of two pile foundations of the invention.

Description of reference numerals: 1 upper pile body, 2 lower pile bodies, 3 bearing platforms, 4 notches, 5 metal welding plates, 6 cavities, 7 vertical plates, 8 first transverse plates, 9 second transverse plates, 10 grouting hard pipes, 11 self-adhesive glue and 12 groove platforms.

Detailed Description

The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that: the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.

Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.

The invention is further described in detail with reference to the accompanying drawings and implementation, and the specific implementation process is as follows:

as shown in fig. 1-2, the invention provides a construction method of a deep soft soil pipe pile, which comprises the following steps:

s1, pile making: the length of each single-section pile is 8-12 meters, and the inner diameter of the lower-section pile body 2 is larger than the outer diameter of the upper-section pile body 1; a horizontal bearing platform 3 is arranged on the inner wall of the upper end of the pile body, an inward-concave notch 4 is formed in the upper surface of the bearing platform 3, and a metal welding plate 5 is embedded in the outer wall of the upper end of the pile body; except for the lowest pile body, the bottom ends of all the pile bodies are provided with convex groove platforms 12, the groove platforms 12 of the upper pile body 1 can be inserted into the groove openings 4 of the lower pile body 2, and the outer wall of the lower end of each pile body is embedded with a metal welding plate 5;

s2, piling: lofting a pile position by using a total station, driving a pile body into a designed position by using a pile driver, and if the perpendicularity deviation of the pile body is more than 1%, correcting the pile body and then driving the pile;

s3, pile splicing: the upper pile body 1 is hoisted and mounted to the lower pile body 2, a groove 12 of the upper pile body 1 is ensured to be inserted into a groove opening 4 of the lower pile body 2, a cavity 6 is formed between the outer wall of the lower end of the upper pile body 1 and the inner wall of the upper end of the lower pile body 2, the upper end of the lower pile body 2 is connected with the lower end of the upper pile body 1 through a connecting piece, and anti-corrosion slurry is injected;

the connector includes: the grouting pile comprises a vertical plate 7, a first transverse plate 8, a second transverse plate 9 and a grouting hard pipe 10, wherein the vertical plate 7 is annularly arranged around the outer wall of a lower pile body 2, the top end of the vertical plate 7 is higher than the top surface of the lower pile body 2, the top end of the vertical plate 7 is connected with the first transverse plate 8 into a whole, the first transverse plate 8 extends to a metal welding plate 5 at the lower end of the upper pile body 1, the second transverse plate 9 is positioned under the first transverse plate 8, one end of the second transverse plate 9 is connected with the vertical plate 7 into a whole, the other end of the second transverse plate 9 extends to be in contact with the outer wall of an upper pile body 1, the lower end of the grouting hard pipe 10 sequentially penetrates through the first transverse plate 8 and the second transverse plate 9 to enter the cavity 6, and the grouting hard pipe 10 is in threaded connection with the first transverse plate 8 and the second transverse plate 9;

the concrete steps of connecting the upper end of the lower pile body 2 and the lower end of the upper pile body 1 through a connecting piece and injecting anti-corrosion slurry are as follows: the method comprises the steps of penetrating a connecting piece along the outer wall of an upper section of pile body 1, supporting a second transverse plate 9 through the top surface of a lower section of pile body 2, welding a first transverse plate 8 with a metal welding plate 5 at the lower end of the upper section of pile body 1, welding a vertical plate 7 with the metal welding plate 5 at the upper end of the lower section of pile body 2, synchronously injecting anti-corrosion slurry into a cavity 6 through a grouting hard pipe 10 during welding, judging whether the cavity 6 is filled with the anti-corrosion slurry or not by observing the grouting hard pipe 10, rotating the grouting hard pipe 10 to reach the bottom of the cavity 6 after the anti-corrosion slurry is solidified with the grouting hard pipe 10 to form a whole, and sealing the grouting hard pipe 10 through the anti-corrosion slurry.

And S4, continuously piling the pile foundation after pile splicing is finished through the pile driver, and repeating the steps S3 and S4 until the pile foundation reaches the design depth.

In above-mentioned technical scheme, the joint play of upper segment pile body 1 and lower segment pile body 2 is because being in deep weak soil stratum, corrodes easily very much, influences the pile foundation performance, consequently diminishes for the diameter between the pile foundation from the bottom up single section pile foundation with the pile foundation design gradually, fills the anticorrosion thick liquids through cavity 6 between the pile foundation of two different diameters to it is sealed through the connecting plate, realizes the anticorrosion construction that the pile foundation connects.

In another embodiment, the wall thickness of the pile body of the single-section pile is 90-120 mm.

In another embodiment, the bearing platform 3 and the pile body are integrally cast, so that the overall strength of the bearing platform is improved.

In another embodiment, a layer of self-adhesive glue 11 is coated in the slot 4, and the slot 4 and the channel platform 12 are sealed by the self-adhesive glue 11.

In another embodiment, in step S2, a pile tip is fixed to the bottom end surface of the lowermost pile shaft before pile driving.

In another embodiment, the distance between the horizontal bearing platform 3 and the top surface of the lower pile body 2 is 60-90 cm. .

In another embodiment, a plurality of grouting hard pipes 10 are arranged along the circumferential direction of the connecting piece, so that synchronous and rapid grouting is realized.

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 to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.