CN114808945A - Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method - Google Patents
Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method Download PDFInfo
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- CN114808945A CN114808945A CN202210470985.9A CN202210470985A CN114808945A CN 114808945 A CN114808945 A CN 114808945A CN 202210470985 A CN202210470985 A CN 202210470985A CN 114808945 A CN114808945 A CN 114808945A
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- pile
- cast
- tubular pile
- foundation pit
- diameter tubular
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000011065 in-situ storage Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 55
- 239000010959 steel Substances 0.000 claims description 55
- 239000004567 concrete Substances 0.000 claims description 29
- 238000005553 drilling Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 description 14
- 238000005452 bending Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of foundation pit supporting, in particular to a cast-in-situ large-diameter tubular pile for foundation pit supporting and a tubular pile construction method.
Description
Technical Field
The invention relates to the technical field of foundation pit supporting, in particular to a cast-in-place large-diameter tubular pile for foundation pit supporting and a tubular pile construction method.
Background
The existing construction method of the cast-in-place large-diameter tubular pile is to firstly dig a hole in a rotary mode and then put in a lining template (a corrugated pipe or a steel pile casing), wherein the corrugated pipe cannot be reused and cannot participate in stress, the manufacturing cost is high, the steel pile casing can be reused but the construction recovery difficulty is high, and the loss is easy, in addition, the existing cast-in-place large-diameter tubular pile needs to be provided with a reinforcement cage to participate in structural stress, the construction period and the cost are increased, the concrete pouring difficulty is high, concretely, the guide pipe needs to be of a certain size when the concrete is poured, the hoop ribs of the reinforcement cage can prevent the guide pipe from sinking, the concrete pouring difficulty is high, the detachable lining template can be conveniently recovered, the device designed at present is complex, the manufacturing cost is high, and therefore, the device is not enough for meeting the higher practicability requirement.
Disclosure of Invention
In view of the above, the invention aims to provide a foundation pit supporting cast-in-situ large-diameter tubular pile so as to solve the problems of high construction difficulty and high manufacturing cost of the existing cast-in-situ large-diameter tubular pile based on a lining template and a reinforcement cage.
Based on the above purpose, the invention provides a foundation pit supporting cast-in-situ large-diameter tubular pile, which is arranged in a foundation pile hole for supporting and comprises:
prop up solid pipe fitting, it is downthehole vertically to arrange the stake in, prop up solid pipe fitting design and be upper and lower open-ended hollow structure, prop up and keep having certain clearance between solid pipe fitting lateral wall and the stake downthehole inside wall, it has pile body plain concrete to pour to fill in the clearance.
Preferably, the bracing tube is a round steel tube, and the wall thickness of the round steel tube is 3 to 20 mm.
Preferably, the wall thickness of the poured pile body plain concrete is 200 to 350 mm.
Preferably, the inner side wall of the supporting and fixing pipe fitting is fixedly connected with a plurality of stiffening ribs at vertical intervals.
Preferably, the stiffening ribs are annular steel plates.
Preferably the stiffener wall thickness is 3 to 10 mm.
Preferably, the annular hole in the middle of the stiffener has a diameter of 400 to 600 mm.
Preferably, the bottom end of the supporting and fixing pipe fitting is connected with a bottom plate in a closed mode.
The invention also provides a construction method of the foundation pit support cast-in-situ large-diameter tubular pile, which comprises the following steps:
a: the rotary drilling rig enters a field for positioning, a hole is drilled to a designed elevation, the diameter of the hole is the diameter of the pile, a steel pipe is placed in the pile hole for positioning, and a certain gap is kept between the steel pipe and the inner wall of the hole;
b: placing a guide pipe in the gap, pouring outer wall concrete, and pulling up the guide pipe along with the rising of the concrete liquid level while pouring to form pile body plain concrete between the soil body and the outer wall of the steel pipe;
c: and finishing the construction.
Preferably, in the step a, after drilling, a bottom plate is horizontally placed in the pile hole for positioning, a vertical steel ring is vertically fixed on an inner ring of the bottom plate, circular stiffening ribs are fixed on the inner side wall of the steel pipe at intervals, a circular groove is formed in the stiffening rib at the bottom end, and when the steel pipe is placed into the steel pipe, the steel pipe is inserted into the groove through the vertical steel ring for positioning and the bottom end opening of the steel pipe is closed.
The invention has the beneficial effects that: the invention relates to an integral stressed cast-in-place large-diameter tubular pile without a lining template and a reinforcement cage, which does not increase the manufacturing cost and influence the construction.
1. The atress is reasonable, and steel construction circular steel tube is anti-bending, and plain concrete shears, can save the steel reinforcement cage, only leans on the plain concrete of no steel reinforcement cage and inner wall circular steel tube to form the novel major diameter cast-in-place tubular pile of whole atress.
2. The construction does not need to additionally consider a lining template, the inner wall circular steel tube can directly replace the lining, the recycling problem does not need to be considered, and the construction difficulty and the construction cost are greatly reduced.
3. The rear guide pipe of the steel reinforcement cage is not obstructed up and down, concrete can be poured conveniently, and the outer wall of the steel reinforcement cage is made of plain concrete with the thickness of more than 200 mm.
4. The invention is mainly used in foundation pit support, and the inner wall steel pipe does not need to adopt strict anti-corrosion measures, so that the manufacturing cost can be reduced.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an overall top view of the present invention;
FIG. 3 is a schematic view of the overall structure of the present invention with stiffening ribs;
FIG. 4 is an overall top view of the present invention with stiffening ribs;
fig. 5 is a schematic view of the overall structure with a bottom plate according to the present invention.
Labeled as:
1. supporting and fixing the pipe fitting; 2. plain concrete of the pile body; 3. a stiffening rib; 4. a base plate; 5. erecting a steel ring; 6. and (4) slotting.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 1 to 5, the cast-in-situ large-diameter tubular pile for foundation pit support is arranged in a foundation pile hole for support, and comprises a supporting and fixing pipe fitting 1, wherein the supporting and fixing pipe fitting 1 is vertically arranged in the pile hole, the supporting and fixing pipe fitting 1 is designed to be of a hollow structure with an upper opening and a lower opening, a certain gap is kept between the outer side wall of the supporting and fixing pipe fitting 1 and the inner side wall of the pile hole, and pile body plain concrete 2 is poured and filled in the gap.
The invention relates to a cast-in-situ large-diameter tubular pile without a lining template and a reinforcement cage, which is characterized in that the construction of the cast-in-situ large-diameter tubular pile without the lining template and the reinforcement cage needs to consider the arrangement of the lining template, not only the manufacturing cost is increased, but also the construction difficulty is increased, a lining corrugated pipe and a steel casing can not participate in the integral stress of the structure, and the recycling and reusing difficulty is high, the cast-in-situ large-diameter tubular pile for foundation pit supporting is arranged in a foundation pile hole for supporting and comprises a supporting pipe fitting 1, the supporting pipe fitting 1 is vertically arranged in the pile hole, the supporting pipe fitting 1 is designed into a hollow structure with an upper opening and a lower opening, a certain gap is kept between the outer side wall of the supporting pipe fitting 1 and the inner side wall of the pile hole, pile body plain concrete 2 is poured and filled in the gap, namely, the pile body plain concrete 2 is directly poured and filled between the soil body of the pile hole and the outer side wall of the hollow supporting pipe fitting 1, preferably, the supporting pipe fitting 1 is manufactured by one-step molding of a circular steel pipe, the design is reasonable, the circular steel pipe with a certain thickness is added on the inner wall of the large-diameter cast-in-place pipe pile to replace an original reinforcement cage to provide bending rigidity of the pile, the concrete is restrained by surrounding soil layers on the inner side wall of a pile hole, no reinforcement is required to be additionally arranged to restrain the concrete, and thus the reinforcement cage in the original pile can be eliminated; in addition, the pile body plain concrete 2 meeting the standard strength requirement is adopted to replace the original reinforced concrete to provide the shear strength, and the wall thickness of the plain concrete can be more than 200 mm.
In the embodiment of the invention, the supporting pipe fitting 1 is a circular steel pipe, and the wall thickness of the circular steel pipe is 3-20 mm so as to fully meet the requirement of bending resistance.
In the embodiment of the invention, the wall thickness of the poured pile body plain concrete 2 is 200-350 mm, so that the large diameter of the cast-in-place pipe pile can be fully utilized to provide great bending rigidity, the wall thickness can be reduced to save materials, and the later green construction design by utilizing geothermal energy can be facilitated.
In the embodiment of the invention, a plurality of stiffening ribs 3 are fixedly connected to the inner side wall of the supporting pipe fitting 1 at vertical intervals, so as to further enhance the bending rigidity of the inner wall, and further replace a reinforcement cage in the original pile.
In the embodiment of the present invention, the stiffening rib 3 is an annular steel plate.
In the embodiment of the present invention, the stiffening ribs 3 have a wall thickness of 3 to 10 mm.
In the embodiment of the invention, the diameter of the circular hole in the middle of the stiffening rib 3 is 400-600 mm, the rigidity of the circular hole stiffening rib 3 is increased to help bending resistance, and the wall thickness of the steel pipe can be reduced, thereby saving materials.
In the embodiment of the invention, the bottom end of the supporting pipe fitting 1 is connected with the bottom plate 4 in a sealing way, so that the supporting capability is further improved, the supporting pipe fitting is isolated from the foundation soil layer in a sealing way, and particularly, the bottom plate 4 and the supporting pipe fitting 1 can be fixedly connected by welding or can be in a detachable movable connection way.
The invention also provides a construction method of the foundation pit support cast-in-situ large-diameter tubular pile, which comprises the following steps:
a: the rotary drilling rig enters a field for positioning, a hole is drilled to a designed elevation, the diameter of the hole is the diameter of the pile, a steel pipe is placed in the pile hole for positioning, and a certain gap is kept between the steel pipe and the inner wall of the hole;
b: placing a guide pipe in the gap, pouring outer wall concrete, and pulling up the guide pipe along with the rising of the concrete liquid level while pouring to form pile body plain concrete 2 between the soil body and the outer wall of the steel pipe;
c: and finishing the construction.
Specially, in step a, put into bottom plate 4 location at the downthehole level of stake after drilling earlier, 4 inner circles of bottom plate are vertical to be fixed with perpendicular steel ring 5, the interval is fixed with the annular stiffening rib 3 of circle on the steel pipe inside wall, the annular fluting 6 of circle has been seted up on the stiffening rib 3 of bottom, when putting into the steel pipe, insert into fluting 6 location through perpendicular steel ring 5, and seal steel pipe bottom opening, thereby when accomplishing the sealing connection, utilize bottom plate 4 to fix a position in advance, the stiffening rib 3 of bottom in the rethread steel pipe is pegged graft with perpendicular steel ring 5 on the bottom plate 4 and is cooperated, accomplish the steel pipe and be the location construction of whole tubular pile promptly.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to those examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a cast-in-place major diameter tubular pile of excavation supporting, locates to strut in with ground foundation pile hole, its characterized in that includes:
the supporting pipe fitting is vertically arranged in the pile hole, the supporting pipe fitting is designed to be of a hollow structure with an upper opening and a lower opening, a certain gap is reserved between the outer side wall of the supporting pipe fitting and the inner side wall of the pile hole, and pile body plain concrete is poured and filled in the gap.
2. The cast-in-place large-diameter tubular pile for foundation pit support according to claim 1, wherein the supporting pipe is a circular steel pipe, and the wall thickness of the circular steel pipe is 3-20 mm.
3. The cast-in-place large-diameter tubular pile for foundation pit support according to claim 1, wherein the wall thickness of the poured pile body plain concrete is 200-350 mm.
4. The cast-in-situ large-diameter tubular pile for foundation pit support according to claim 1, wherein a plurality of stiffening ribs are fixedly connected to the inner side wall of the supporting pipe at vertical intervals.
5. The cast-in-place large-diameter tubular pile for foundation pit support according to claim 4, wherein the stiffening ribs are circular steel plates.
6. The cast-in-place large-diameter tubular pile for foundation pit support according to claim 5, wherein the wall thickness of the stiffening rib is 3-10 mm.
7. The cast-in-situ large-diameter tubular pile for foundation pit support according to claim 5, wherein the diameter of the circular hole in the middle of the stiffening rib is 400-600 mm.
8. The cast-in-situ large-diameter tubular pile for foundation pit support according to claim 1, wherein the bottom end of the supporting pipe is connected with a bottom plate in a sealing manner.
9. A construction method for a foundation pit support cast-in-situ large-diameter tubular pile is characterized by comprising the following steps:
a: the rotary drilling rig enters a field for positioning, a hole is drilled to a designed elevation, the diameter of the hole is the diameter of the pile, a steel pipe is placed in the pile hole for positioning, and a certain gap is kept between the steel pipe and the inner wall of the hole;
b: placing a guide pipe in the gap, pouring outer wall concrete, and pulling up the guide pipe along with the rising of the concrete liquid level while pouring to form pile body plain concrete between the soil body and the outer wall of the steel pipe;
c: and finishing the construction.
10. The construction method of a foundation pit supporting cast-in-place large-diameter tubular pile according to claim 9, characterized in that in the step a, a bottom plate is horizontally placed in a pile hole for positioning after drilling, a vertical steel ring is vertically fixed on an inner ring of the bottom plate, circular stiffening ribs are fixed on the inner side wall of the steel pipe at intervals, circular slots are formed in the stiffening ribs at the bottom end, and when the steel pipe is placed, the steel pipe is inserted into the slots for positioning through the vertical steel ring, and the opening at the bottom end of the steel pipe is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470985.9A CN114808945A (en) | 2022-04-28 | 2022-04-28 | Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470985.9A CN114808945A (en) | 2022-04-28 | 2022-04-28 | Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method |
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| Publication Number | Publication Date |
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| CN114808945A true CN114808945A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210470985.9A Pending CN114808945A (en) | 2022-04-28 | 2022-04-28 | Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method |
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|---|---|---|---|---|
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| KR101463771B1 (en) * | 2014-07-07 | 2014-11-21 | 고종원 | Unit for Reinforcing Head of Steel Tube Pile |
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| CN207525999U (en) * | 2017-12-04 | 2018-06-22 | 东华理工大学 | A kind of rubber concrete coupled column |
| CN211312527U (en) * | 2019-11-07 | 2020-08-21 | 中国建筑第二工程局有限公司 | Support stand bottom plate watertight fittings in ultra-deep foundation ditch |
| CN212077915U (en) * | 2020-02-18 | 2020-12-04 | 水利部交通运输部国家能源局南京水利科学研究院 | Pile extension connecting device for steel-bottom mixed variable-section combined piles with different diameters |
| CN212656235U (en) * | 2020-05-14 | 2021-03-05 | 湖北中南岩土工程有限公司 | Double-row steel pipe pile supporting structure for foundation pit supporting |
| CN213086701U (en) * | 2020-08-26 | 2021-04-30 | 钟海鹏 | Template component for hydraulic and hydroelectric engineering construction |
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| CN214089843U (en) * | 2020-10-22 | 2021-08-31 | 西安市政设计研究院有限公司 | Novel pile extension column structure |
| CN214272066U (en) * | 2020-10-26 | 2021-09-24 | 浙江世润建创科技发展有限公司 | High water content soft soil precipitation excavation integral sewer pipeline |
| CN214738211U (en) * | 2021-04-16 | 2021-11-16 | 王朝艳 | Anti-seismic building pile for building |
| CN114319412A (en) * | 2021-09-02 | 2022-04-12 | 中国电建集团华东勘测设计研究院有限公司 | Single-pile foundation supported by inclined piles and construction method thereof |
-
2022
- 2022-04-28 CN CN202210470985.9A patent/CN114808945A/en active Pending
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| CN207525999U (en) * | 2017-12-04 | 2018-06-22 | 东华理工大学 | A kind of rubber concrete coupled column |
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| CN213448540U (en) * | 2020-09-10 | 2021-06-15 | 喻鑫浩 | Reinforcing apparatus is used to road and bridge pile foundation |
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