CN117107747A - Tubular pile body, broken stone drainage tubular pile and construction method of broken stone drainage tubular pile - Google Patents
Tubular pile body, broken stone drainage tubular pile and construction method of broken stone drainage tubular pile Download PDFInfo
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- CN117107747A CN117107747A CN202311377171.1A CN202311377171A CN117107747A CN 117107747 A CN117107747 A CN 117107747A CN 202311377171 A CN202311377171 A CN 202311377171A CN 117107747 A CN117107747 A CN 117107747A
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- 239000004575 stone Substances 0.000 title claims abstract description 64
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 239000002689 soil Substances 0.000 claims description 16
- 239000004746 geotextile Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000007596 consolidation process Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000002411 adverse Effects 0.000 description 6
- 230000007774 longterm Effects 0.000 description 6
- 238000004590 computer program Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011380 pervious concrete Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The embodiment of the application discloses a tubular pile body, a broken stone drainage tubular pile and a construction method thereof, wherein the tubular pile body comprises: pile body, drainage channel, fixing piece, end plate and hoop; a plurality of drainage grooves with depth h are formed in the outer side wall of the pile body, and the wall thickness of the pile body is h thicker than that of a standard PHC pipe pile of the same type; the cavity of the drainage groove is used for filling broken stones, and the drainage groove is formed along the longitudinal direction of the pile body; the fixing piece is arranged at the cornice of the drainage groove and is used for fixing geotechnical cloth; the end plates are arranged at two ends of the pile body, and openings corresponding to the drainage grooves are formed in the end plates; the hoops are arranged on the end plates and are arranged along the longitudinal direction of the pile body. The broken stone drainage mode is adopted, the drainage capacity is strong, the broken stone drainage is not blocked, the broken stone drainage device can be used together with surcharge preloading and vacuum preloading, drainage consolidation is accelerated, and the construction period is shortened.
Description
Technical Field
The application relates to the technical field of pile foundation engineering, in particular to a tubular pile body, a broken stone drainage tubular pile and a construction method thereof.
Background
In the field of constructional engineering, precast piles are pile types which are frequently adopted in foundation treatment, and particularly prestressed pipe piles are widely applied due to the characteristics of controllable quality, low price and the like.
In deep soft soil areas, due to poor permeability of the soft soil layers, soil drainage consolidation is slow, soil around the prestressed pipe piles is not consolidated for months or even years after pile sinking is completed, and the soil still generates consolidation settlement after building completion, so that the prestressed pipe piles generate negative frictional resistance, and the long-term bearing performance of pile foundations is reduced.
Therefore, in order to accelerate soil drainage consolidation, eliminate negative friction influence, improve the bearing performance of pile foundation, provide a prestressed pipe pile that drainage performance is good, be the technical problem that the technical personnel in the field need to solve urgently.
Disclosure of Invention
In view of the above, the application provides a tubular pile body, a gravel drainage tubular pile and a construction method thereof, which solve the technical problem of poor long-term bearing performance of the existing prestressed tubular pile foundation.
The first aspect of the present application provides a pipe pile body comprising: pile body, drainage channel, fixing piece, end plate and hoop;
a plurality of drainage grooves with depth h are formed in the outer side wall of the pile body, and the wall thickness of the pile body is h thicker than that of a standard PHC pipe pile of the same type;
the cavity of the drainage groove is used for filling broken stones, and the drainage groove is formed along the longitudinal direction of the pile body;
the fixing piece is arranged at the cornice of the drainage groove and is used for fixing geotechnical cloth;
the end plates are arranged at two ends of the pile body, and openings corresponding to the drainage grooves are formed in the end plates;
the hoops are arranged on the end plates and are arranged along the longitudinal direction of the pile body.
Further, the tubular pile body further includes: a vertical grouting pipe;
the vertical grouting pipe is arranged on the pile body;
and an end plate grouting pipe through hole used for the vertical grouting pipe to penetrate is formed in the end plate.
Further, the tubular pile body further includes: a water through hole;
the water through holes are formed along the longitudinal direction of the pile body, and the water through holes are positioned between the vertical grouting pipe and the drainage groove.
Further, the width of the drain groove is 2h~3h。
Further, mesh steel plates are welded at the lower cornice of the opening of the end plate.
Further, the ferrule includes: a drainage channel steel plate and an arc-shaped steel plate;
the drainage groove steel plate is connected with the end plate;
and the arc-shaped steel plate is welded with the drainage groove steel plate.
A second aspect of the present application provides a gravel drainage pipe pile comprising: geotextiles, crushed stones and the tubular pile body according to any one of the first aspects;
the geotextile is connected with the fixing piece;
the broken stone is filled in the cavity of the drainage groove.
Further, the gravel drainage pipe pile further includes: an annular grouting pipe;
the annular grouting pipe is arranged in the end plate of the pipe pile body at the bottommost layer;
the annular grouting pipe is connected with the vertical grouting pipe, and the annular grouting pipe is provided with a grouting hole at the corresponding position of the drainage groove.
Further, the gravel drainage pipe pile further includes: closing the cross pile tip;
the closed cross pile tip is arranged at the end plate of the pipe pile body at the bottommost layer.
A third aspect of the present application provides construction applied to the gravel drainage pipe pile according to any of the second aspects, the method comprising:
s1, fixing geotextile on a fixing piece at a cornice of a drainage tank;
s2, filling broken stone into the drainage tank;
and S3, sinking the broken stone drainage pipe pile into the soil layer.
One of the above technical solutions has the following advantages and effects:
in the above scheme, a tubular pile body includes: pile body, drainage channel, fixing piece, end plate and hoop; a plurality of drainage grooves with depth h are formed in the outer side wall of the pile body, and the wall thickness of the pile body is h thicker than that of a standard PHC pipe pile of the same type; the cavity of the drainage groove is used for filling broken stones, and the drainage groove is formed along the longitudinal direction of the pile body; the fixing piece is arranged at the cornice of the drainage tank and is used for fixing geotechnical cloth; the end plates are arranged at two ends of the pile body, and openings corresponding to the drainage grooves are formed in the end plates; the hoop is arranged on the end plate and is arranged along the longitudinal direction of the pile body.
According to the scheme, the tubular pile body adopts a broken stone drainage mode, has strong drainage capacity, is not blocked, can be used together with preloading and vacuum preloading, accelerates drainage consolidation, shortens construction period, eliminates adverse effects of negative friction resistance on pile foundation bearing performance, and solves the technical problem of poor long-term bearing performance of the existing prestressed tubular pile foundation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a cross-sectional view of an embodiment of a tubular pile body provided by an embodiment of the present application;
fig. 2 is a schematic structural view of an end plate of a tubular pile body according to an embodiment of the present application;
fig. 3 is a schematic structural view of a ferrule of a tubular pile body according to an embodiment of the present application;
fig. 4 is a schematic structural view of a gravel drainage pipe pile according to an embodiment of the present application;
FIG. 5 is a cross-sectional view of a section of a gravel drainage pipe pile a-a according to an embodiment of the present application;
FIG. 6 is a developed view of geotextile covering drainage grooves in a crushed stone drainage pipe pile according to an embodiment of the present application;
fig. 7 is a top view of a closed cross pile tip of a gravel drainage pile according to an embodiment of the present application;
fig. 8 is a schematic diagram of connection of an annular grouting pipe of a gravel drainage pipe pile according to an embodiment of the present application;
wherein, the reference numerals are as follows:
1. gravel drainage pipe piles; 101. an end plate; 101a, mesh steel plates; 101b, end plate grouting pipe through holes; 102. a ferrule; 102a, a drainage tank steel plate; 102b, arc-shaped steel plates; 102c, welding seams; 103. a prestressed steel bar; 104. a vertical grouting pipe; 105. a drainage channel; 105a, a fixing member; 106. breaking stone; 107. geotextile; 107a, iron wires; 108. an annular grouting pipe; 108a, a slurry outlet hole; 108b, a three-way joint; 109. and closing the cross pile tip.
Detailed Description
The embodiment of the application provides a tubular pile body, a broken stone drainage tubular pile and a construction method thereof, which solve the technical problem that the conventional prestressed tubular pile foundation has poor long-term bearing performance.
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The applicant is based on the existing technical problem, in order to accelerate the soil drainage consolidation and eliminate the negative friction influence, firstly, the method is provided to reduce the pile body strength through pile body opening, but the method is only applicable to the composite foundation with single pile and low bearing capacity, and is not applicable to the pile foundation; the applicant has also improved pile performance by reserving drainage channels 105 and securing the drainage piles of plastic drainage plates, but the plastic drainage plates are vulnerable to construction and risk of possible clogging during drainage of pervious concrete. Based on the above, the applicant sets up rubble drainage mode, and not only drainage is strong, and does not silt up, can combine with surcharge pre-compaction and vacuum pre-compaction to use, accelerates drainage concretion, shortens construction period, eliminates negative friction and influences on pile foundation bearing performance.
Referring to fig. 1 to 3, the tubular pile body of the present embodiment includes: pile body, drain groove 105, fixing member 105a, end plate 101 and ferrule 102; a plurality of drainage grooves 105 with depth h are formed in the outer side wall of the pile body, and the wall thickness of the pile body is h thicker than that of a standard PHC pipe pile of the same type; the cavity of the drainage tank 105 is used for filling broken stone, and the drainage tank 105 is arranged along the longitudinal direction of the pile body; the fixing piece 105a is provided at the cornice of the drainage tank 105 for fixing geotextile; the end plates 101 are arranged at two ends of the pile body, and openings corresponding to the drainage grooves 105 are formed in the end plates 101; the ferrule 102 is provided on the end plate 101 and is provided in the longitudinal direction of the pile body.
In this embodiment, the wall thickness of the pile body is thicker than the wall thickness h of the same type standard PHC pile, and the drainage groove 105 is formed in the increased thickness h, so that the section of the pile body is not reduced, and the strength of the pile body is not affected.
The cavity of the drainage groove 105 is used for filling crushed stone in the embodiment, so that the drainage groove 105 of the pipe pile body filled with crushed stone forms a crushed stone drainage channel, and the drainage channel can be used in combination with surcharge preloading and vacuum preloading to accelerate drainage consolidation, shorten construction period and eliminate adverse effect of negative friction resistance on pile foundation bearing performance.
It is understood that the number of the drainage grooves 105 may be one or more. When the number of the drainage grooves 105 is one, the specific arrangement of the drainage grooves 105 may be any position of the tubular pile body, which is not particularly limited in this embodiment; when the number of the drainage grooves 105 is plural, the plurality of drainage grooves 105 may be uniformly distributed along the pile circumference of the pile body for the uniformity of drainage.
It should be noted that, the specifications of the standard PHC pile of different types are shown in the following table 1:
table 1 Standard PHC pipe pile specification
It is to be understood that the structure of the fixing member 105a may be any of a variety of structures, such as hooks, fixing hooks, etc., so long as the geotextile can be fixed, which is not specifically limited and described in detail in the present embodiment. The pile body is provided with end plates 101 at both ends, and cuffs 102 are provided on the end plates 101 in the longitudinal direction of the pile body, and corresponding openings are provided on the end plates 101 and cuffs 102 for the passage of the drainage grooves 105 for smooth drainage of the drainage grooves 105 and smooth installation of the end plates 101 and cuffs 102.
The drainage groove 105 of the tubular pile body in the embodiment is used for filling broken stone, so that the tubular pile body in the embodiment adopts a broken stone drainage mode, has strong drainage capability, is not blocked, can be used in combination with surcharge preloading and vacuum preloading, accelerates drainage consolidation, shortens construction period, eliminates adverse effects of negative friction on pile foundation bearing performance, and solves the technical problem of poor long-term bearing performance of the existing prestressed tubular pile foundation. Meanwhile, in the embodiment, the pile body wall thickness of the pile body is increased by h compared with that of a standard PHC pile of the same type, and the section of the pile is not reduced, so that the drainage groove 105 on the outer side of the pile body does not influence the strength of the pile body.
The foregoing is a first embodiment of a tubular pile body provided by the embodiments of the present application, and the following is a second embodiment of a tubular pile body provided by the embodiments of the present application.
Referring to fig. 1, the tubular pile body of the present embodiment includes: pile body, drain groove 105, fixing member 105a, end plate 101 and ferrule 102; a plurality of drainage grooves 105 with depth h are formed in the outer side wall of the pile body, and the wall thickness of the pile body is h thicker than that of a standard PHC pipe pile of the same type; the cavity of the drainage tank 105 is used for filling broken stone, and the drainage tank 105 is arranged along the longitudinal direction of the pile body; the fixing piece 105a is provided at the cornice of the drainage tank 105 for fixing geotextile; the end plates 101 are arranged at two ends of the pile body, and openings corresponding to the drainage grooves 105 are formed in the end plates 101; the ferrule 102 is provided on the end plate 101 and is provided in the longitudinal direction of the pile body.
It should be noted that the range of the value of the increased wall thickness h of the tubular pile body can be 20mm-40mm.
Optionally, in an alternative embodiment, the tubular pile body is further provided with a vertical grouting pipe 104, the vertical grouting pipe 104 is disposed on the pile body, and the vertical grouting pipe 104 is disposed along the longitudinal direction of the pile body in the same way, so that the end plate 101 of the tubular pile body is provided with an end plate grouting pipe through hole 101b through which the vertical grouting pipe 104 penetrates. It will be appreciated that the vertical grouting pipe 104 is used to grouting into the drainage channel 105 to fill the crushed stone gap and enhance pile foundation load bearing performance.
Further, for effective drainage, the tubular pile body in this embodiment further includes a water through hole (not shown in the figure), which is opened in the longitudinal direction of the pile body, and which is located between the vertical grouting pipe 104 and the drainage channel 105.
It will be appreciated that in order to effectively fill the drainage channel 105 with crushed stone, and also to facilitate the drainage channel 105 having a width of 2 in an alternative embodimenth~3h。
Further, in order that the crushed stone can effectively enter the drainage tank 105, the maximum particle size of the crushed stone is not more than h/3.
In order to effectively drain water, the end plate 101 in the present embodiment is provided with an opening having the same size as the drain tank 105, and a mesh steel plate 101a is welded to the lower cornice of the opening. Mesh steel plate 101a and open end plate 101 ensure smooth drainage between upper and lower section piles.
Further, the cuff 102 in this embodiment is provided with a pre-opening for the passage of the drain tank 105. Specifically, the ferrule 102 in the present embodiment includes: a drain tank steel plate 102a and an arc steel plate 102b; the pre-opening is provided on the drain tank steel plate 102a of the ferrule 102, the drain tank steel plate 102a is press-formed, and then the drain tank steel plate 102a and the arc-shaped steel plate 102b are welded into the ferrule 102 by the weld joint 102 c.
It will be appreciated that, as with the standard PHC pile, the pile body in this embodiment is also provided with a pre-stressed steel bar 103 for improving the load-bearing performance of the pile.
In a specific embodiment, the wall thickness of the tubular pile body is increased by 20mm-40mm compared with the same type standard PHC tubular pile, the depth of the drainage channel 105 is 20mm-40mm, and the width of the drainage channel is 40mm-120mm.
The drainage groove 105 of the tubular pile body in the embodiment is used for filling broken stone, so that the tubular pile body in the embodiment adopts a broken stone drainage mode, has strong drainage capability, is not blocked, can be used in combination with surcharge preloading and vacuum preloading, accelerates drainage consolidation, shortens construction period, eliminates adverse effects of negative friction on pile foundation bearing performance, and solves the technical problem of poor long-term bearing performance of the existing prestressed tubular pile foundation. Meanwhile, in the embodiment, the pile body wall thickness of the pile body is increased by h compared with that of a standard PHC pile of the same type, and the section of the pile is not reduced, so that the drainage groove 105 on the outer side of the pile body does not influence the strength of the pile body.
The above is a second embodiment of the tubular pile body provided in the embodiment of the present application, and the following is an embodiment of the gravel drainage tubular pile 1 provided in the embodiment of the present application.
Referring to fig. 4 to 8, a gravel drainage pipe pile 1 of the present embodiment includes: geotextile 107, crushed stone 106, and the tubular pile body of either the first embodiment or the second embodiment; geotextile 107 is attached to anchor 105 a; the crushed stone 106 is filled in the cavity of the drain tank 105. That is, the wall thickness of the crushed stone drainage pipe pile 1 in the embodiment is increased by h compared with that of a standard PHC pipe pile of the same type, a plurality of drainage grooves 105 are formed on the outer side of the pile body along the longitudinal direction, crushed stone 106 is filled in the drainage grooves 105, the crushed stone 106 grooves are covered by geotextile 107, and the crushed stone 106 is fixed on a fixing piece 105a by iron wires 107a, so that a crushed stone 106 drainage channel is formed. The crushed stone drainage pipe pile 1 is internally embedded with a grouting pipe in a through length mode and is communicated with a pile tip annular grouting pipe 108. The annular grouting pipe 108 is arranged at the pile tip end plate 101 and is welded and fixed on the drainage pile end plate 101 together with the closed cross pile tip 109.
Further, in an alternative embodiment, the gravel drainage pipe pile 1 further includes: an annular grouting pipe 108; the annular grouting pipe 108 is arranged in the end plate 101 of the pipe pile body at the bottommost layer; the annular grouting pipe 108 and the vertical grouting pipe 104 are connected, and the annular grouting pipe 108 is provided with a grouting hole 108a at a corresponding position of the drainage tank 105. The annular grouting pipe 108 is provided with a grouting hole 108a at the position of the drainage groove 105. After pile sinking and drainage consolidation are completed, grouting is carried out on the pile end and the pile side through a grouting pipe, and gaps of broken stones 106 are filled and pile-soil interfaces are reinforced.
It will be appreciated that the gravel drainage pipe piles 1 are provided with vertical grouting pipes 104 in the pipe wall on the side of each drainage channel 105, and are provided with annular grouting pipes 108 through tee joints 108 b. The annular grouting pipe 108 is arranged at the end plate 101 of the lowest crushed stone drainage pipe pile 1 and is fixed on the drainage pipe pile end plate 101 through the closed cross pile tip 109.
Optionally, in an exemplary embodiment, the gravel drainage pipe pile 1 further includes: closing the cross pile tip 109; the closed cross pile tip 109 is provided at the end plate 101 of the lowermost tubular pile body.
As can be seen from the above, compared with the prior art, the gravel drainage pipe pile 1 in this embodiment has the following advantages:
(1) The wall thickness of the broken stone drainage pipe pile 1 is increased by h compared with that of a standard PHC pipe pile with the same type, and the section of the pipe pile is not reduced, so that the drainage groove 105 at the outer side of the pipe wall does not influence the strength of the pile body.
(2) The tubular pile adopts a broken stone 106 drainage mode, has strong drainage capability, is not blocked, can be used together with surcharge preloading and vacuum preloading, accelerates drainage consolidation, shortens construction period, and eliminates adverse effect of negative friction resistance on pile foundation bearing performance.
(3) Vertical grouting pipes 104 and annular grouting pipes 108 are buried in the wall of the gravel drainage pipe pile 1, grouting can be conducted on the pile end and the pile side, gaps of the gravel 106 are filled, pile-soil interfaces are reinforced, and pile foundation bearing performance is improved.
The above is an embodiment of a gravel drainage pipe pile provided by the embodiment of the application, and the following is an embodiment of a construction method of a gravel drainage pipe pile provided by the embodiment of the application.
The construction method of the gravel drainage pipe pile in this embodiment includes:
and 101, fixing geotextile on a fixing piece at the cornice of the drainage tank.
And 102, filling broken stone into the drainage tank.
And 103, sinking the crushed stone drainage pipe pile into the soil layer.
Further, the detailed construction method of the crushed stone drainage pipe pile in the embodiment comprises the following steps:
s1: and (5) pile sinking preparation. And conveying the crushed stone drainage pipe piles to the site, binding geotechnical cloth on a fixing piece of a cornice of a drainage tank by adopting an iron wire, and pouring crushed stone into the tank. And welding a closed cross pile tip on the lowest section of broken stone drainage pipe pile, and fixing an annular grouting pipe.
S2: pile sinking construction. And (3) sinking the broken stone drainage pipe pile into the soil layer by adopting a static pile driver, a hammering pile driver or a pile planting method until the designed depth is reached. When the length of the single-section broken stone drainage pipe pile is insufficient, pile extension can be adopted to increase the pile length, and the upper section pipe pile and the lower section pipe pile are welded or mechanically connected.
S3: and (5) draining and solidifying. And after pile sinking, excavating a drainage ditch on the pile top, and connecting the drainage ditch into a net. The drainage groove of the gravel drainage pipe pile has strong water-through capacity, can be used in combination with preloading and vacuum pressure, accelerates drainage consolidation of soil body around the pile, and shortens construction period.
S4: grouting and reinforcing. And if necessary, grouting the pile end and the pile side through the vertical grouting pipe, filling the broken stone gap and reinforcing the pile-soil interface, and improving the bearing performance of the pile foundation.
From the above, the advantages and effects of the present embodiment are as follows:
(1) The wall thickness of the broken stone drainage pipe pile is increased by h compared with that of a conventional PHC pipe pile with the same type, and the section of the pipe pile is not reduced, so that the drainage groove on the outer side of the pipe wall does not influence the strength of the pile body.
(2) The tubular pile adopts a broken stone drainage mode, has strong drainage capability, is not blocked, can be used together with surcharge preloading and vacuum preloading, accelerates drainage consolidation, shortens construction period, and eliminates adverse effect of negative friction resistance on pile foundation bearing performance.
(3) Grouting pipes are buried in the broken stone drainage pipe pile walls, grouting can be conducted on the pile ends and the pile sides, broken stone gaps are filled, pile-soil interfaces are reinforced, and pile foundation bearing performance is improved.
(4) The broken stone drainage pipe pile and the construction method thereof have the advantages of simple technical principle, convenient construction, easy material obtaining, strong functionality and the like.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. A tubular pile body, comprising: pile body, drainage channel, fixing piece, end plate and hoop;
a plurality of drainage grooves with depth h are formed in the outer side wall of the pile body, and the wall thickness of the pile body is h thicker than that of a standard PHC pipe pile of the same type;
the cavity of the drainage groove is used for filling broken stones, and the drainage groove is formed along the longitudinal direction of the pile body;
the fixing piece is arranged at the cornice of the drainage groove and is used for fixing geotechnical cloth;
the end plates are arranged at two ends of the pile body, and openings corresponding to the drainage grooves are formed in the end plates;
the hoops are arranged on the end plates and are arranged along the longitudinal direction of the pile body.
2. The tubular pile body of claim 1, further comprising: a vertical grouting pipe;
the vertical grouting pipe is arranged on the pile body;
and an end plate grouting pipe through hole used for the vertical grouting pipe to penetrate is formed in the end plate.
3. The tubular pile body of claim 2, further comprising: a water through hole;
the water through holes are formed along the longitudinal direction of the pile body, and the water through holes are positioned between the vertical grouting pipe and the drainage groove.
4. The tubular pile body of claim 1, wherein the drainage channel has a width of 2h~3h。
5. The pipe pile body according to claim 1, wherein mesh steel plates are welded at the lower cornice of the end plate opening.
6. The tubular pile body of claim 1, wherein the ferrule comprises: arc-shaped steel plates and drain tank steel plates;
the drainage groove steel plate is connected with the end plate;
and the arc-shaped steel plate is welded with the drainage groove steel plate.
7. A gravel drainage pipe pile, comprising: geotextiles, crushed stones and a tubular pile body according to any one of claims 1 to 6;
the geotextile is connected with the fixing piece;
the broken stone is filled in the cavity of the drainage groove.
8. The gravel drainage pipe pile according to claim 7, further comprising: an annular grouting pipe;
the annular grouting pipe is arranged in the end plate of the pipe pile body at the bottommost layer;
the annular grouting pipe is connected with the vertical grouting pipe, and the annular grouting pipe is provided with a grouting hole at the corresponding position of the drainage groove.
9. The gravel drainage pipe pile according to claim 7, further comprising: closing the cross pile tip;
the closed cross pile tip is arranged at the end plate of the pipe pile body at the bottommost layer.
10. A construction method of a gravel drainage pipe pile, characterized by being applied to the construction of a gravel drainage pipe pile according to any one of claims 7 to 9, the method comprising:
s1, fixing geotextile on a fixing piece at a cornice of a drainage tank;
s2, filling broken stone into the drainage tank;
and S3, sinking the broken stone drainage pipe pile into the soil layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311377171.1A CN117107747A (en) | 2023-10-24 | 2023-10-24 | Tubular pile body, broken stone drainage tubular pile and construction method of broken stone drainage tubular pile |
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| CN202311377171.1A CN117107747A (en) | 2023-10-24 | 2023-10-24 | Tubular pile body, broken stone drainage tubular pile and construction method of broken stone drainage tubular pile |
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| CN117107747A true CN117107747A (en) | 2023-11-24 |
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| JPS6149023A (en) * | 1984-08-14 | 1986-03-10 | Nippon Koatsu Concrete Kk | Reinforcement of existing concrete pile |
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| JPS6149023A (en) * | 1984-08-14 | 1986-03-10 | Nippon Koatsu Concrete Kk | Reinforcement of existing concrete pile |
| JPH0296018A (en) * | 1988-09-29 | 1990-04-06 | Kubota Ltd | Pile setting work |
| JPH02225710A (en) * | 1988-11-11 | 1990-09-07 | Sumitomo Metal Ind Ltd | Liquefaction suppressing pile |
| JP2012214984A (en) * | 2011-03-31 | 2012-11-08 | Nippon Steel & Sumikin Metal Products Co Ltd | Concrete pile with outer shell steel pipe, and method of manufacturing the same |
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