阅读说明：本技术 一种兼作降水井的预应力管桩及其施工方法 (Prestressed pipe pile serving as dewatering well and construction method thereof ) 是由 秦星 张琦 石章入 方培源 罗会武 李雪松 邱敏 成浩 王运发 杜柯 沈华炜 于 2020-12-10 设计创作，主要内容包括：本发明涉及软土地基处理技术领域,具体地指一种兼作降水井的预应力管桩及其施工方法。包括管桩本体；所述管桩本体的轴心处开设有沿轴向贯通管桩本体的通孔,管桩本体圆周外侧沿管桩本体周向间隔布置有多个透水管；所述透水管为对应透水层处的管体上开设有多个透水孔的管状结构,透水管沿管桩本体轴向布置；所述管桩本体下端设置有连通透水管下端和通孔下端的通道；所述管桩本体下端还设置有桩尖。本发明的管桩结构极为简单,除了能够对软土地基进行加强外,还能够兼做软土地基透水层的降水井,无需重新再软土地基上布置降水结构,且施工简单,具有极大的推广价值。(The invention relates to the technical field of soft soil foundation treatment, in particular to a prestressed pipe pile serving as a dewatering well and a construction method thereof. Comprises a tubular pile body; the axial center of the tubular pile body is provided with a through hole which penetrates through the tubular pile body along the axial direction, and a plurality of water permeable pipes are arranged on the outer side of the circumference of the tubular pile body at intervals along the circumferential direction of the tubular pile body; the permeable pipe is a tubular structure with a plurality of permeable holes formed in the pipe body corresponding to the permeable layer, and the permeable pipe is axially arranged along the tubular pile body; the lower end of the tubular pile body is provided with a channel for communicating the lower end of the permeable pipe with the lower end of the through hole; the lower end of the tubular pile body is also provided with a pile tip. The tubular pile structure is very simple, can reinforce a soft soil foundation, can also be used as a dewatering well of a permeable layer of the soft soil foundation, does not need to arrange a dewatering structure on the soft soil foundation again, is simple to construct and has great popularization value.)

1. The utility model provides a two times as stress tube stake of precipitation well which characterized in that: comprises a tubular pile body (1); the axial center of the tubular pile body (1) is provided with through holes (4) which axially penetrate through the tubular pile body (1), and a plurality of water permeable pipes (2) are circumferentially arranged at intervals along the tubular pile body (1) on the outer side of the circumference of the tubular pile body (1); the permeable pipe (2) is a tubular structure with a plurality of permeable holes formed in the pipe body corresponding to the permeable layer, and the permeable pipe (2) is axially arranged along the tubular pile body (1); the lower end of the tubular pile body (1) is provided with a channel for communicating the lower end of the permeable pipe (2) with the lower end of the through hole (4); the lower end of the tubular pile body (1) is also provided with a pile tip (8).

2. The prestressed pipe pile used as dewatering well as claimed in claim 1, wherein: the circumference inner side cover of the water permeable pipe (2) is provided with a protective structure for protecting the water permeable pipe (2) from being extruded by the extrusion force in the inserting and beating process of the tubular pile body (1).

3. The prestressed pipe pile used as dewatering well as claimed in claim 2, wherein: the protection structure comprises a steel pipe (3) sleeved in the permeable pipe (2) in the inserting and beating process of the tubular pile body (1); the steel pipe (3) is detachably sleeved on the water permeable pipe (2) through a threaded structure (5).

4. The prestressed pipe pile used as dewatering well as claimed in claim 1, wherein: the channel comprises an upper end plate (6) fixed at the lower end of the tubular pile body (1), an annular plate (11) fixed at the lower end face of the upper end plate and a lower end plate (10) fixed at the lower end of the annular plate (11); the upper end plate (6), the annular plate (11) and the lower end plate (10) form a hollow cavity (9); the cavity (9) is respectively communicated with the water permeable pipe (2) and the through hole (4).

5. The prestressed pipe pile used as dewatering well as claimed in claim 4, wherein: and a plurality of rib plates (7) which are arranged at intervals are arranged between the upper end plate (6) and the lower end plate (10).

6. The prestressed pipe pile used as dewatering well as claimed in claim 1, wherein: the outer side surface of the circumference of the tubular pile body (1) is provided with arc-shaped grooves which are axially arranged; one side body of the permeable pipe (2) extends into the groove, and the other side body protrudes out of the outer side face of the circumference of the tubular pile body (1).

7. The prestressed pipe pile used as dewatering well as claimed in claim 1, wherein: the plurality of water permeable pipes (2) are arranged in pairs and oppositely by taking the axis of the tubular pile body (1) as the center.

8. The construction method of the prestressed pipe pile used as a dewatering well as claimed in claim 3, wherein the construction method comprises the following steps: cup joint steel pipe (3) and in pipe (2) inboardly of permeating water, sink the stake to stake body (1), after to the design position, dismantle and take out steel pipe (3), transfer suction pump to through-hole (4) bottom, open and draw water behind the suction pump.

Technical Field

The invention relates to the technical field of soft soil foundation treatment, in particular to a prestressed pipe pile serving as a dewatering well and a construction method thereof.

Background

The prestressed pipe pile has the characteristics of reliable quality, high bearing capacity and high construction efficiency, and is widely used in building foundations and foundation pit support structures. When the pile foundation is used as a building foundation, the bearing capacity of soil between piles cannot be fully exerted due to the great difference between the rigidity and the bearing capacity of foundation soil and a pipe pile foundation; particularly, a building (structure) constructed on a soft foundation often needs to be subjected to foundation treatment and then a pipe pile is constructed on the soft foundation, or the pipe pile enters a better bearing layer; the bearing capacity of the foundation is far less than the strength of the pile body, so that the waste of materials is easily caused.

When the tubular pile is used as a foundation pit enclosure structure, a dewatering well still needs to be arranged in the pit to ensure dry excavation and prevent the bottom of the pit from surging; the construction of a main body structure is influenced by a plurality of dewatering wells arranged in the pit, and particularly the dewatering wells need to be plugged after the construction of a bottom plate structure.

Disclosure of Invention

The invention aims to solve the defects of the background technology and provide a prestressed pipe pile which is also used as a dewatering well and a construction method thereof.

The technical scheme of the invention is as follows: the utility model provides a two times as stress tube stake of precipitation well which characterized in that: comprises a tubular pile body; the axial center of the tubular pile body is provided with a through hole which penetrates through the tubular pile body along the axial direction, and a plurality of water permeable pipes are arranged on the outer side of the circumference of the tubular pile body at intervals along the circumferential direction of the tubular pile body; the permeable pipe is a tubular structure with a plurality of permeable holes formed in the pipe body corresponding to the permeable layer, and the permeable pipe is axially arranged along the tubular pile body; the lower end of the tubular pile body is provided with a channel for communicating the lower end of the permeable pipe with the lower end of the through hole; the lower end of the tubular pile body is also provided with a pile tip.

Further the pipe of permeating water is equipped with the protection structure that the protection was permeated water and is made it not receive the extrusion effort at the inboard cover of tubular pile body interpolation in-process circumference.

The protection structure further comprises a steel pipe sleeved in the water permeable pipe in the inserting and beating process of the tubular pile body; the steel pipe passes through the helicitic texture detachably cup joints on the pipe of permeating water.

The channel further comprises an upper end plate fixed at the lower end of the tubular pile body, an annular plate fixed at the lower end surface of the upper end plate and a lower end plate fixed at the lower end of the annular plate; the upper end plate, the annular plate and the lower end plate form a hollow cavity; the cavity is respectively communicated with the water permeable pipe and the through hole.

And a plurality of rib plates which are arranged at intervals are arranged between the upper end plate and the lower end plate.

Further, the outer side surface of the circumference of the tubular pile body is provided with arc-shaped grooves which are arranged along the axial direction; in one side body of the pervious pipe stretches into the groove, the other side body protrudes out of the outer side surface of the circumference of the tubular pile body.

The further water permeable pipes are arranged in pairs and oppositely by taking the axis of the tubular pile body as the center.

A construction method of a prestressed pipe pile used as a dewatering well is characterized in that: cup joint the steel pipe and in permeating water intraductal side, carry out the pile sinking to the tubular pile body, after the design position, dismantle and take out the steel pipe, transfer the suction pump to the through-hole bottom, open and draw water behind the suction pump.

The invention has the advantages that: 1. according to the invention, the plurality of permeable pipes are arranged on the outer side of the circumference of the tubular pile body, the permeable pipes are used for collecting underground water in a permeable layer, and the underground water is discharged into the through hole through the channel at the bottom and pumped out, so that the whole tubular pile structure not only can play a role of strengthening a soft soil foundation, but also can be used as a dewatering well in the soft soil foundation, is highly centralized, is simple in construction method, and has great popularization value;

2. according to the invention, the protective structure is arranged on the inner side of the circumference of the permeable pipe, so that the phenomenon that the permeable pipe deforms to influence the use effect of the permeable pipe due to the extrusion effect of the lateral soil layer in the inserting and beating process is avoided, and the phenomenon that the permeable holes are blocked by the permeable holes formed by the lateral soil layer entering the permeable pipe in the inserting and beating process can also be avoided;

3. the steel pipe is used as a protection structure, the threaded structure is connected with the steel pipe and the water permeable pipe, the installation and the disassembly are very convenient, the steel pipe can be repeatedly used, and the cost is greatly saved;

4. according to the invention, the hollow cavity is arranged at the lower end of the tubular pile body and is used for communicating the water permeable pipe with the bottom of the through hole, so that underground water is conveniently and quickly collected and is not easy to block;

5. the ribbed plates are arranged in the cavity, and the ribbed plates are used for supporting the upper end plate and the lower end plate, so that the structural stability of the whole cavity is enhanced, and the damage in the inserting and beating process is avoided;

6. according to the invention, the arc-shaped groove is formed in the outer side of the circumference of the tubular pile body, one part of the water permeable pipe is embedded into the groove, and the groove can protect the water permeable pipe;

7. the water permeable pipes are symmetrically arranged in pairs, so that the precipitation of the water permeable layer is more complete.

The tubular pile structure is very simple, can reinforce a soft soil foundation, can also be used as a dewatering well of a permeable layer of the soft soil foundation, does not need to arrange a dewatering structure on the soft soil foundation again, is simple to construct and has great popularization value.

Drawings

FIG. 1: the invention is a schematic structural diagram of a tubular pile;

FIG. 2: the cross section structure of the tubular pile is shown schematically;

wherein: 1, a tubular pile body; 2-a water permeable pipe; 3, steel pipes; 4-a through hole; 5, a thread structure; 6, an upper end plate; 7-a rib plate; 8, pile tip; 9, a cavity; 10-lower end plate; 11-an annular plate; 12-a first through-hole; 13-second communication hole.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "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 device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The invention is described in further detail below with reference to the figures and the specific embodiments.

If fig. 1 ~ 2, a hold concurrently as prestressing force tubular pile of precipitation well, including tubular pile body 1, tubular pile body 1 of this embodiment is reinforced concrete structure, and tubular pile body 1 is both ends open-ended tubular structure, and tubular pile body 1's axle center department sets up along axial through tubular pile body 1's through-hole 4, and through-hole 4 is used for depositing the precipitation, lays the water pump in through-hole 4 and takes water away, can accomplish and carry out the precipitation to the permeable bed in the soft foundation soil layer.

This embodiment has a plurality of pipes 2 of permeating water along 1 circumference interval arrangement of tubular pile body in the 1 circumference outside of tubular pile body, the tubular structure in a plurality of holes of permeating water is offered for corresponding on the body of permeable bed department to permeate water pipe 2, permeate water pipe 2 and arrange along 1 axial of tubular pile body, the groundwater on permeable bed can be collected in entering into permeable water pipe 2 through the hole of permeating water, this embodiment is provided with the passageway of 2 lower extremes of intercommunication permeable pipe and 4 lower extremes of through-hole at 1 lower extreme of tubular pile body, the water that enters into permeable pipe 2 enters into through-hole 4 from the passageway of bottom.

As shown in fig. 1, the channel comprises an upper end plate 6 fixed at the lower end of the tubular pile body 1, an annular plate 11 fixed at the lower end face of the upper end plate, and a lower end plate 10 fixed at the lower end of the annular plate 11, the upper end plate 6, the annular plate 11 and the lower end plate 10 form a hollow cavity 9, and the cavity 9 is respectively communicated with the water permeable pipe 2 and the through hole 4. The upper end plate 6 is located the bottom of permeating water pipe 2 and tubular pile body 1, sets up the first intercommunicating pore 12 of 2 bottoms of intercommunication pipe, the second intercommunicating pore 13 of 4 bottoms of intercommunication through-holes on the upper end plate 6, and the water that enters into in the pipe 2 of permeating water enters into cavity 9 from the first intercommunicating pore 12 of bottom, then enters into through-hole 4 bottoms through second intercommunicating pore 13.

This embodiment sets up the arc recess of arranging along the axial at tubular pile body 1's circumference lateral surface, and in one side body of pipe 2 of permeating water stretched into the recess, opposite side body protrusion in tubular pile body 1 circumference lateral surface, such arrangement mode can protect pipe 2 of permeating water in inserting and beating the work progress. The two liang of mutual dispositions of a plurality of pervious pipes 2 of this embodiment use tubular pile body 1 axis as the center, as shown in fig. 2, the demonstration is two pervious pipes 2, and two liang of symmetries divide and arrange the both sides of tubular pile body 1 in.

Pile sinking in-process, in order to avoid soft foundation soil layer to produce the extrusion to permeating water pipe 2, this embodiment is provided with protective structure in the circumference inboard of permeating water pipe 2, as shown in figure 1 ~ 2, protective structure includes that 1 inserting of tubular pile body beats the in-process cover and establishes the steel pipe 3 on permeating water pipe 2, and steel pipe 3 cup joints on permeating water pipe 2 through helicitic texture 5 (including the inboard internal thread of 2 circumference of permeating water pipe and the 3 inboard external screw threads of steel pipe) detachably.

In addition, this embodiment is provided with the floor 7 of polylith interval arrangement between upper end plate 6 and lower end plate 10, and the floor is used for strengthening the intensity of whole cavity 9 structure, avoids appearing the damage in the pile sinking process, and the lower terminal surface of lower end plate 10 is provided with stake point 8.

During actual construction, according to the geological structure of pile sinking position, go out to set up the pipe 2 of permeating water that corresponds at the degree of depth that corresponds the permeable bed, will permeate water pipe 2 and assemble back on tubular pile body 1, handling to pile sinking position, establish steel pipe 3 at the inboard cover of pipe 2 of permeating water, connect as an organic wholely through helicitic texture 5, then shake and sink to the design position, dismantle and take out steel pipe 3, transfer suction pump to 4 bottoms of through-hole, open and draw water behind the suction pump.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.