CN210395319U

CN210395319U - But recovery type steel-pipe pile convenient to clearance stake core soil

Info

Publication number: CN210395319U
Application number: CN201920208647.1U
Authority: CN
Inventors: 冯研; 宁远涛; 蔡凡
Original assignee: Huaiyin Institute of Technology
Current assignee: SHIJIAZHUANG MUNICIPAL DESIGN & RESEARCH Co.,Ltd.
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2020-04-24
Anticipated expiration: 2029-02-19

Abstract

The utility model discloses a recoverable steel pipe pile convenient for cleaning pile core soil, which comprises an upper pipe body and a lower pipe body which is arranged below the upper pipe body through threaded connection and is formed by connecting two semicircular columnar pipe pieces; the columnar duct piece is fixedly connected through at least one pair of hinges in front and at back; the bottom of the lower pipe body is provided with 15 circles of standard sawtooth internal threads, so that the length of the lower pipe body can be increased; the utility model splices the columnar duct pieces into the lower pipe body which can be opened through the hinge, realizes the purpose of quickly and conveniently cleaning the pile core soil, and is in threaded connection through the sawtooth thread screwing structure, thereby saving manpower; the length of the lower pipe body can be increased in real time according to actual needs, and pile core soil can be cleaned conveniently and quickly for a deep clay layer.

Description

But recovery type steel-pipe pile convenient to clearance stake core soil

Technical Field

The utility model relates to a civil construction field, concretely relates to but recovery type steel-pipe pile convenient to clearance stake core soil.

Background

In the river crossing engineering construction of bridges and ports, the construction of an underwater pile foundation is often the key for determining the success or failure of the engineering and is one of the construction difficulties. At present, in many projects at home and abroad, after a cofferdam is formed under the support of a driving type steel pipe pile, a foundation construction operation space is formed after water is drained. And after the foundation construction is finished, the steel pipe pile is dismantled to recover the water level line and the water surface navigation. Before the construction of the recyclable steel pipe pile is applied to the foundation construction of bridges and harbor river-crossing projects, I-shaped steel is used as a pile driving material at first, but due to factors such as prefabrication difficulty, stress performance, material cost and the like, a large-diameter steel pipe structure is adopted later, the steel pipe pile is divided into a bottom opening type structure and a closed type structure with a pile shoe, the closed type structure with the pile shoe can well avoid the phenomenon of retaining pile core soil, but the pile end penetration resistance received during pile driving is higher, the construction is difficult in hard clay, compact pebble and gravel strata, if the strength of a blade foot is not enough, the pile shoe can be deformed, and a pipe body nearby the pile shoe is further damaged, so that the recycling and the use are not facilitated; the open type steel pipe pile is simple to prefabricate and construct, but after the clay area is recovered, because the cohesive force of soil and the compact effect of power hammering when driving the pile, a large amount of compact pile core soil is detained in the pipe, because it is deeper to drive into, the compactness of the original soil body of the pile core in the pipe body is very high, is difficult to clear away, causes great inconvenience for transportation, causes the fuel power loss in the later construction period to be great, and also causes great influence on the service life of the pipe body material. The existing cleaning method mainly adopts a hand-held drilling machine, the effective cleaning length is limited within 5m, and the steel pipe pile with the diameter more than 10m in the clay region can not be thoroughly cleaned.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a but recovery type steel-pipe pile convenient to clearance stake core soil through set the lower body to the formula of opening, realizes the purpose of quick convenient clearance stake core soil.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a but recovery type steel-pipe pile convenient to clearance stake core soil, includes body and lower body down, body threaded connection is in the below of body down, just the body is connected by the cross section for two semicircle annular column section of jurisdiction and forms down.

The utility model discloses a further technical improvement scheme is, the column section of jurisdiction is through hinge fixed connection in pairs around, through hinged joint, conveniently unpacks the lower body apart when extracting the steel pipe, clears up stake core soil.

The utility model discloses a further technical improvement is, the interval between two upper and lower hinges of lower body one side is less than 500mm, and the column section of jurisdiction does not take place to separate and warp when guaranteeing to bury.

The utility model discloses a further technical improvement is, the upper tube body lower extreme is equipped with 15 rings of standard sawtooth internal threads, and through threaded connection, demolish the convenience with the 15 rings of standard sawtooth external screw thread threaded connection that lower tube body upper end set up.

The utility model discloses a further technical improvement scheme is, body bottom is equipped with cyclic annular 45 degrees round-nose edges foot down to reduce the degree of difficulty of burying when the pile is driven.

The utility model discloses a further technical improvement scheme is, body bottom is equipped with 15 rings of standard sawtooth internal threads down, through body length under the threaded connection extension, if meet dark thick clay layer, under the more circumstances of stake core soil prediction, can design into the internal thread structure bottom of body down, body or multisection body under the body bottom increases again through the screw thread to this increases the length of body down.

The utility model discloses a further technical improvement scheme is, go up body, lower body and be the inside hollow steel pipe of major diameter open type.

The utility model has the advantages that:

1. the utility model discloses pass through body under the hinged joint forms two cross sections for semicircular column section of jurisdiction, in clearance stake core soil, demolish the hinge, the lower body becomes the column section of jurisdiction, quick convenient clearance stake core soil, practice thrift the human cost, practice thrift the fuel power expense that the stake core soil that the transportation can't clear away brought, the ageing this cost loss that the original state soil that can also avoid can't clear away caused the corruption of steel pipe, avoid the stake core soil to remain for a long time in the corrosion that the body inner wall produced and cause steel pipe strength's reduction, effectively reduce the potential safety hazard of the inside construction of cofferdam.

2. The utility model discloses the cover has sawtooth screw thread structure of screwing on the body lateral wall, and it has four arm of force rotary rod sockets all around, inserts steel lever (or the twisted steel of suitable size) in arm of force rotary rod socket, applys the moment of torsion through the steel lever, realizes threaded connection, can use manpower sparingly like this.

3. The utility model discloses body bottom designs into 45 degrees round-nose edges, can reduce the degree of difficulty of burying during the pile.

4. The utility model discloses lower body can be according to how much of stake core soil increase the length of body down through threaded connection at any time, can thoroughly clear up fast more than 10 m's steel-pipe pile in clay area.

Drawings

FIG. 1 is a schematic view showing an overall structure of a steel pipe pile according to example 1;

FIG. 2 is a schematic view of the lower tube body;

FIG. 3 shows a schematic view of a hinge structure;

FIG. 4 is a schematic view showing a structure of tightening a buttress thread;

FIG. 5 is a schematic view showing the overall structure of embodiment 3.

1-upper tube body, 2-lower tube body, 3-45 degree round edge foot, 4-hinge, 5-columnar tube piece, 7-internal thread, 8-external thread and 9-arm of force rotary rod socket.

Detailed Description

The following description will be further made with reference to fig. 1 to 5 for a recyclable steel pipe pile convenient for cleaning up the core soil of the pile of the present invention.

Example 1:

referring to fig. 1, fig. 1 shows an overall structural schematic diagram of a recoverable steel pipe pile convenient for cleaning pile core soil. The main structure body in this embodiment is 1200mm major diameter open steel pipe, the steel model can be according to strutting the lateral wall initiative load and confirm, generally be not lower than national standard Q235 steel yield strength, this structure includes body 1 and sets up and connect the lower body 2 that forms for two semicircle annular column section of jurisdiction 5 connections by the cross section in body 1 below last body through threaded connection, column section of jurisdiction 5 is through preceding 4 fixed connection of mated hinge, if under the longer condition of body 2, need use mated hinge 4 fixed connection around the multiunit, it is fixed to adopt multiunit hinge 4 down when body 2 is longer, the interval between two adjacent hinges 4 of one side is less than 500mm, the section of jurisdiction does not take place the separation and warp when body 2 buries into the earth down like this. The lower end of the upper pipe body 1 is provided with internal threads which are in threaded connection with external threads arranged at the upper end of the lower pipe body 2, the threads in the embodiment are 15 standard sawtooth threads, the threaded connection can be conveniently disassembled, the connection strength during vertical force transmission is ensured through the design of the sawtooth threads, and four force arm rotating rod sockets 9 are arranged on the outer side of the upper pipe body 1; the bottom of the lower pipe body 2 is provided with an annular 45-degree circular edge foot so as to reduce the difficulty of burying soil during piling. The structure of the columnar duct piece 5 and the hinge 4 is shown in fig. 2 and 3.

Before construction, two columnar duct pieces 5 are spliced according to the position of a sawtooth thread, a lower pipe body 2 is fixed through a hinge 4, a sawtooth thread screwing structure is sleeved on the outer side of the pipe body (the upper pipe body 1 or the lower pipe body 2), the sawtooth thread screwing structure comprises four arm of force rotating rod sockets 9, a steel lever (or a threaded steel bar with a proper size) is inserted into the arm of force rotating rod sockets 9, torque is applied through the steel lever, the lower pipe body 2 and the upper pipe body 1 are fixed through threaded connection, and the steel pipe pile body can be driven into the soil; after the construction is completed, the temporary supporting steel pipe pile body is pulled out, the hinges 4 are taken out one by one, and the columnar duct piece 5 is opened, so that the pile core soil can be cleaned quickly and conveniently, and the difficult situation that the hard and compact pile core soil is difficult to clean due to the long pile length is avoided.

Example 2:

as shown in fig. 5, in this embodiment, a further improvement is made to embodiment 1, if a deep clay layer is encountered, the pile core soil is large, the length of the lower pipe body 2 spliced by the existing cylindrical segments 5 cannot meet the actual requirement, here, an internal thread may be provided on the inner side of the bottom of the lower pipe body 2, and the lower pipe body 2 spliced by the cylindrical segments 5 is connected by a plurality of threads, so as to lengthen the length of the lower pipe body 2 until the actual requirement can be met. The specific screwing method in this example was the same as in example 1, and the rest was performed as in example 1.

The technical solution disclosed in the present invention is not limited to the technical means disclosed in the above embodiments, but also includes the technical solution formed by combining the above technical features at will. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a but recovery type steel-pipe pile convenient to clearance stake core soil which characterized in that: the pipe comprises an upper pipe body (1) and a lower pipe body (2), wherein the lower pipe body (2) is in threaded connection with the lower portion of the upper pipe body (1), and the lower pipe body (2) is formed by connecting two semi-annular cylindrical pipe pieces (5) on the cross section.

2. The recyclable steel pipe pile convenient for pile core soil cleaning according to claim 1, characterized in that: the columnar duct piece (5) is fixedly connected through at least one pair of hinges (4) in the front and at the back.

3. The recyclable steel pipe pile convenient for pile core soil cleaning according to claim 2, characterized in that: the distance between the adjacent hinges (4) on one side of the lower pipe body (2) is less than 500 mm.

4. The recyclable steel pipe pile convenient for pile core soil cleaning according to claim 1, characterized in that: the lower end of the upper pipe body (1) is provided with 15 circles of standard sawtooth internal threads (7) which are in threaded connection with 15 circles of standard sawtooth external threads (8) arranged at the upper end of the lower pipe body (2).

5. The recyclable steel pipe pile convenient for pile core soil cleaning according to claim 1, characterized in that: the bottom of the lower tube body (2) is provided with an annular 45-degree round edge foot.

6. The recyclable steel pipe pile convenient for pile core soil cleaning according to claim 1, characterized in that: the inside wall of the bottom of the lower pipe body (2) is provided with 15 circles of standard sawtooth internal threads (7).

7. The recyclable steel pipe pile convenient for pile core soil cleaning according to claim 1, characterized in that: the upper pipe body (1) and the lower pipe body (2) are large-diameter open type steel pipes with hollow interiors.