CN111778969A - Double-sleeve type full-rotation super-long pile construction tool and construction method - Google Patents
Double-sleeve type full-rotation super-long pile construction tool and construction method Download PDFInfo
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- CN111778969A CN111778969A CN202010706118.1A CN202010706118A CN111778969A CN 111778969 A CN111778969 A CN 111778969A CN 202010706118 A CN202010706118 A CN 202010706118A CN 111778969 A CN111778969 A CN 111778969A
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 42
- 239000011435 rock Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 8
- 230000010412 perfusion Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- 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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a double-sleeve type full-rotation super-long pile construction tool and a construction method, wherein the construction tool comprises an outer sleeve and an inner sleeve, the outer sleeve bears upper-section pressure and frictional resistance, and the inner sleeve directly drills rock by utilizing an inner cavity of the outer sleeve; the full-slewing drilling machine applies force and torsion to the outer sleeve and the inner sleeve in sequence to drill or lift, and is convenient to drill deeper places. The construction method adopts a sectional construction method for the ultra-long pile, increases the length of the constructable pile, and respectively constructs the outer sleeve and the inner sleeve through a rotary drilling machine, separates the working resistance of the sleeve and extends the working length of the rotary drilling machine.
Description
Technical Field
The invention relates to the field of building construction, in particular to a double-sleeve type full-rotation overlong pile construction tool and a construction method.
Background
In recent years, with the rapid development of large-scale capital constructions such as airports, bridges, high-rise buildings and the like, the application of large-diameter and ultra-long cast-in-place pile technology is common in China. In the construction of traversing complex weak or high backfill stratum, the full-casing full-rotation construction process is widely applied to pile foundation construction due to the advantages of good hole forming quality, stable pile forming quality and low construction noise. However, the following situations are often encountered in the construction process of the full-casing full-rotation construction process: 1. the construction depth of the pipe following construction process is influenced by the external environment, the pipe wall is increased by the frictional resistance along with the increase of the construction depth, and the drilling depth is limited; 2. when the depth of the pile hole is large, a thickened sleeve needs to be adopted, and the self weight of the sleeve further increases the pipe drawing load. Larger full-rotary drilling machines are needed, but the number of the large-scale rotary drilling machines in China is small at present, resources are difficult to call, the use cost is high, and the production investment is large. If larger equipment is not used, the failure of pulling the sleeve has a large chance, and huge economic loss is caused.
Disclosure of Invention
The invention aims to provide a double-sleeve type full-rotation overlong pile construction tool and a construction method aiming at the defects in the prior art, and the double sleeves are utilized to realize the construction of a cast-in-place pile in an overlong complex stratum.
In order to achieve the purpose, the invention adopts the following technical scheme:
on the one hand, the utility model provides a double-pipe type full-rotation overlength pile construction tool, including outer tube and the coaxial interior sleeve pipe of locating in the outer tube, interior sleeve pipe length is greater than the outer tube, outer tube and interior sleeve pipe divide into several sections linkage segments along the axial, are the connection of dismantling between each linkage segment.
Furthermore, the connecting sections are connected through bolts.
Furthermore, lugs are arranged at the lower end of the pipe wall of each connecting section at intervals, grooves matched with the lugs to be inserted are formed in the outer wall of the upper end of the pipe wall, and the connecting sections are assembled through bolt connection at the inserting positions.
Further, the drilling ends of the inner and outer sleeves are detachably connected with drill blades.
On the other hand, the invention also provides a double-casing type full-rotation overlong pile construction method, which comprises the following steps: 1) measuring a fixed-point pile core, and preparing a plurality of sections of outer sleeves with the diameters matched with the designed pile diameter and inner sleeves with the diameters smaller than 400mm of the outer sleeves; 2) connecting an outer sleeve with a full-slewing drilling machine, starting the full-slewing drilling machine to press in the outer sleeve, continuously taking soil in the pressing process, connecting an outer sleeve connecting section with a proper length when the outer sleeve is about to drill to a rock stratum, and completely drilling a circular section at the lowest end of the outer sleeve into the rock stratum; 3) connecting the inner sleeve with a full-slewing drilling machine, starting the full-slewing drilling machine to press the inner sleeve, continuously taking soil in the pressing process, and pressing the inner sleeve into the designed elevation of the pile bottom; 4) arranging a reinforcement cage, beginning to pour concrete through a pouring guide pipe, lifting the inner sleeve upwards when the concrete is poured to the depth of the lowest karst cave, measuring the liquid level elevation of the concrete in real time, and continuously lifting the inner sleeve when the liquid level of the poured concrete stably rises; 5) when the inner sleeve is lifted to be above the bottom of the outer sleeve, a full-rotary drilling machine is used for lifting and removing the inner sleeve; 6) after the inner sleeve is removed, the pouring guide pipe is lifted upwards while pouring concrete, so that the pouring guide pipe is buried 3m-6m below the liquid level of the concrete, and when the concrete is poured to a preset elevation, a full-rotary drilling machine is used for lifting and removing the outer sleeve; 7) the outer sleeve and the irrigation catheter are removed.
Further, in the step 2), after the connecting section of the outer sleeve with the proper length is connected, when the bottom section of the outer sleeve is completely drilled into the rock stratum, the outer sleeve is located at the lowest operation position of the wedge-shaped clamp clamping device of the full-slewing drilling machine.
Further, in the step 4), when the height of the poured concrete is high and the flow rate is suddenly reduced, the pouring guide pipe is vertically inserted and pulled.
Further, the amplitude of the up and down suction and insertion of the perfusion catheter is 200-300 mm.
Further, in the step 7), after the outer sleeve is removed, when the concrete surface does not reach the preset elevation, the filling pipe is removed after the concrete surface is filled to the preset elevation through the filling pipe.
Further, in the step 7), after the pouring guide pipe is removed, when the concrete surface does not reach the preset elevation, the concrete is filled to the preset elevation by adopting a secondary grouting technology.
Compared with the prior art, the invention has the advantages that:
the tool comprises an outer sleeve and an inner sleeve, wherein the outer sleeve bears the upper-section pressure and the frictional resistance, and the inner sleeve directly drills rock by utilizing the inner cavity of the outer sleeve; the full-slewing drilling machine applies force and torsion to the outer sleeve and the inner sleeve in sequence to drill or lift, and is convenient to drill deeper places. The construction method adopts a segmented construction method for the ultra-long pile, increases the length of the constructable pile, and completes the construction of the cast-in-place pile in the ultra-long complex stratum by respectively constructing the outer sleeve and the inner sleeve through a rotary drilling machine and splitting the working resistance of the sleeve.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.
Fig. 1 is a schematic structural view of a double-casing pipe type full-slewing long pile construction tool.
Fig. 2 is a schematic structural view of a connection section of a double-casing pipe type full-swing ultra-long pile construction tool.
Fig. 3 is a process flow diagram of a construction method of a double-casing pipe type full-rotation super-long pile.
Reference numbers in the figures: 1. an outer sleeve; 2. an inner sleeve; 3. a bump; 4. a groove; 5. a bolt; 6. a full-slewing drilling machine; 7. a drill edge; 8. backfilling the soil layer; 9. a rock formation.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, there will now be described in detail, with reference to the accompanying drawings, a non-limiting detailed description of the present invention.
As shown in fig. 1 and 2, the double-sleeve full-rotation ultra-long pile construction tool includes an outer sleeve 1 and an inner sleeve 2 slidably and coaxially sleeved in the outer sleeve 1, the length of the inner sleeve 2 is greater than that of the outer sleeve 1, the outer sleeve 1 and the inner sleeve 2 are respectively divided into a plurality of connecting sections along the axial direction, the lower end of the wall of each connecting section is provided with a bump 3 at an interval, the outer wall of the upper end is provided with a groove 4 into which the bump 3 is adapted to be inserted, and the inserting bolt 5 is connected to assemble the connecting sections. The lower extreme at the linkage segment of outer tube 1 and interior sleeve pipe 2 all sets up the connecting hole, and drill bit 6 is connected with outer tube 1 and interior sleeve pipe 2 through connecting hole detachable, is convenient for creep into of outer tube 1 and interior sleeve pipe 2.
As shown in fig. 3, the double-casing type full-rotation super-long pile construction method includes the following steps:
1) preparation before construction: measuring a fixed point pile core, positioning a JAR-260H full-rotation drilling machine 6, and preparing a plurality of sections of outer sleeves with the diameters matched with the designed pile diameter and a plurality of sections of inner sleeves with the diameters smaller than 400mm of the outer sleeves.
2) Drilling an outer sleeve: the outer sleeve is connected with a full-circle slewing drilling machine, the full-circle slewing drilling machine is started to press the outer sleeve into a backfill soil layer 8, soil is continuously taken out in the pressing process, when the outer sleeve is about to be pressed into a rock stratum 9, an outer sleeve matching joint with a proper length is connected, the matching joint can enable the circular section of the lowest end of the outer sleeve to be completely drilled into the rock stratum, the upper end of the outer sleeve is located at the lowest operation position of a wedge-shaped clamp clamping device of the full-circle slewing drilling machine, and then the circular section of the lowest end of the.
3) Drilling an inner sleeve: and connecting the inner sleeve with a full-slewing drilling machine, starting the full-slewing drilling machine to press the inner sleeve into the pile bottom, continuously taking soil in the pressing process, and pressing the inner sleeve into the designed elevation position of the pile bottom. Because the upper end of the outer sleeve is positioned at the lowest operation position of the wedge-shaped clamp clamping device of the full-slewing drilling machine, the one-time drilling stroke of the inner sleeve can be increased.
4) And arranging a reinforcement cage, and connecting a hopper, a hopper plug and a perfusion conduit.
5) Preparing and pouring concrete: preparing super-retarding self-compacting underwater non-diffusion concrete, wherein the initial setting time of the concrete is more than or equal to the time required by pouring the whole pile; the prepared concrete is poured into the hopper, the hopper plug is opened, the concrete is poured into the hopper plug through the pouring guide pipe, when the concrete is poured to the depth of the lowest karst cave, the inner sleeve is lifted upwards, the concrete liquid level elevation is measured in real time, and when the poured concrete liquid level stably rises, the inner sleeve is continuously lifted, so that the karst cave is prevented from draining water to impact the concrete to cause concrete segregation. In order to facilitate the discharge of concrete in the guide pipe and prevent the pipe from being blocked, when the height of the poured concrete is higher and the flow rate is suddenly reduced, the poured guide pipe is vertically inserted and pulled in a drawing and inserting range of 200mm-300 mm.
6) Removing the inner sleeve: and when the inner sleeve is lifted to be above the bottom of the outer sleeve, the inner sleeve is lifted and detached by using a full-slewing drilling machine.
7) Removing the outer sleeve: and after removing the inner sleeve, lifting the pouring guide pipe upwards while pouring concrete, so that the pouring guide pipe is buried 3-6 m below the liquid level of the concrete, and lifting to remove the outer sleeve by using a full-rotary drilling machine after the concrete is poured to a preset elevation.
8) Removing the perfusion catheter: and after the outer sleeve is removed, if the concrete surface does not reach the preset elevation, filling concrete to the preset elevation through the filling conduit, and lifting and removing the filling conduit.
9) And (3) concrete filling: and after the cast-in-place pipe is removed, if the concrete surface does not reach the preset elevation, filling concrete to the elevation before the initial setting of the cast-in-place concrete pile.
The construction tool comprises an outer sleeve and an inner sleeve, wherein the outer sleeve bears the upper-section pressure and the frictional resistance, and the inner sleeve directly drills rock by utilizing the inner cavity of the outer sleeve; the full-slewing drilling machine applies force and torsion to the outer sleeve and the inner sleeve in sequence to drill or lift, and is convenient to drill deeper places. The construction method utilizes the principle that long-section working objects are segmented, single-section limit effects are obtained firstly, and then the single-section effects are combined to obtain multi-section effects, fully utilizes the limited torque and drawing force of the drilling machine to act on the inner sleeve and the outer sleeve in a centralized manner, and achieves the purpose that the construction depth of the drilling machine is multiplied. The ultra-retarding self-compacting underwater non-diffusion concrete prepared in the construction process ensures that a single process is continuous, ensures that the fluid concrete completely fills a karst cave, prevents a filling conduit from being blocked, prevents the problem of quality defect of a pile body that concrete in a post-solidification state cannot be supplemented after pulling out a sleeve, and improves the quality of the pile body.
Claims (9)
1. The double-sleeve full-rotation super-long pile construction tool is characterized by comprising an outer sleeve and an inner sleeve which is slidably and coaxially sleeved in the outer sleeve, wherein the length of the inner sleeve is larger than that of the outer sleeve, the outer sleeve and the inner sleeve are axially divided into a plurality of connecting sections, and the connecting sections are detachably connected.
2. The double-casing full-swing ultra-long pile construction tool according to claim 1, wherein the connection sections are connected with each other through bolts.
3. The double-sleeve full-rotation ultra-long pile construction tool according to claim 2, wherein the lower end of the pipe wall of the connecting section is provided with a bump at an interval, the outer wall of the upper end is provided with a groove into which the bump is inserted, and the inserting part is connected with a bolt to assemble the connecting sections.
4. The double-barreled full-swing ultra-long pile hand tool of claim 1, wherein the drilling ends of the inner and outer barrels have drill blades removably attached thereto.
5. The double-sleeve full-rotation super-long pile construction method is characterized by comprising the following steps of:
1) measuring a fixed-point pile core, and preparing a plurality of sections of outer sleeves with the diameters matched with the designed pile diameter and inner sleeves with the diameters smaller than 400mm of the outer sleeves;
2) connecting an outer sleeve with a full-slewing drilling machine, starting the full-slewing drilling machine to press in the outer sleeve, continuously taking soil in the pressing process, connecting an outer sleeve connecting section with a proper length when the outer sleeve is about to drill to a rock stratum, and completely drilling a circular section at the lowest end of the outer sleeve into the rock stratum;
3) connecting the inner sleeve with a full-slewing drilling machine, starting the full-slewing drilling machine to press the inner sleeve, continuously taking soil in the pressing process, and pressing the inner sleeve into the designed elevation of the pile bottom;
4) arranging a reinforcement cage, beginning to pour concrete through a pouring guide pipe, lifting the inner sleeve upwards when the concrete is poured to the depth of the lowest karst cave, measuring the liquid level elevation of the concrete in real time, and continuously lifting the inner sleeve when the liquid level of the poured concrete stably rises;
5) when the inner sleeve is lifted to be above the bottom of the outer sleeve, a full-rotary drilling machine is used for lifting and removing the inner sleeve;
6) after the inner sleeve is removed, the pouring guide pipe is lifted upwards while pouring concrete, so that the pouring guide pipe is buried 3m-6m below the liquid level of the concrete, and when the concrete is poured to a preset elevation, a full-rotary drilling machine is used for lifting and removing the outer sleeve;
7) and (4) removing the outer sleeve, filling concrete to a preset elevation through the filling conduit, and removing the filling conduit.
6. The double-sleeve full-rotation ultra-long pile construction method as claimed in claim 5, wherein in the step 2), after the connecting section of the outer sleeve with the proper length is connected, when the bottom section of the outer sleeve is completely drilled into the rock stratum, the outer sleeve is located at the lowest operation position of the wedge clamp clamping device of the full-rotation drilling machine.
7. The double-pipe full-swing ultra-long pile construction method according to claim 5, wherein in the step 4), the cast-in-place pipe is pulled and inserted up and down when the cast-in-place concrete is high in height and the flow rate is suddenly reduced.
8. The construction method of the double-casing full-circle super long pile as claimed in claim 7, wherein the amplitude of the up-down suction-insertion of the perfusion conduit is 200mm and 300 mm.
9. The double-casing pipe type full-rotation overlong pile construction method as claimed in claim 5, wherein in the step 7), after the filling pipe is removed, when the concrete surface does not reach a preset elevation, the concrete is filled to the preset elevation by using a secondary grouting technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010706118.1A CN111778969A (en) | 2020-07-21 | 2020-07-21 | Double-sleeve type full-rotation super-long pile construction tool and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010706118.1A CN111778969A (en) | 2020-07-21 | 2020-07-21 | Double-sleeve type full-rotation super-long pile construction tool and construction method |
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| CN111778969A true CN111778969A (en) | 2020-10-16 |
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| CN202010706118.1A Pending CN111778969A (en) | 2020-07-21 | 2020-07-21 | Double-sleeve type full-rotation super-long pile construction tool and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832965A (en) * | 2021-09-28 | 2021-12-24 | 安徽省路港工程有限责任公司 | Steel sleeve wall protection device and sand-gravel region cast-in-place pile construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603342A (en) * | 2013-11-01 | 2014-02-26 | 中冶天工上海十三冶建设有限公司 | Construction method of ultra-long bored concrete pile with large-diameter casing combination |
| CN110331718A (en) * | 2019-07-05 | 2019-10-15 | 深圳宏业基岩土科技股份有限公司 | Mortise and tenon type connects steel bushing pipe joint structure |
| CN212223855U (en) * | 2020-07-21 | 2020-12-25 | 广西建工集团基础建设有限公司 | Double-sleeve type full-rotation super-long pile construction tool |
-
2020
- 2020-07-21 CN CN202010706118.1A patent/CN111778969A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603342A (en) * | 2013-11-01 | 2014-02-26 | 中冶天工上海十三冶建设有限公司 | Construction method of ultra-long bored concrete pile with large-diameter casing combination |
| CN110331718A (en) * | 2019-07-05 | 2019-10-15 | 深圳宏业基岩土科技股份有限公司 | Mortise and tenon type connects steel bushing pipe joint structure |
| CN212223855U (en) * | 2020-07-21 | 2020-12-25 | 广西建工集团基础建设有限公司 | Double-sleeve type full-rotation super-long pile construction tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832965A (en) * | 2021-09-28 | 2021-12-24 | 安徽省路港工程有限责任公司 | Steel sleeve wall protection device and sand-gravel region cast-in-place pile construction method |
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