CN107794919A - The method that protective layer is set at the hole wall in major diameter rotary digging hole - Google Patents
The method that protective layer is set at the hole wall in major diameter rotary digging hole Download PDFInfo
- Publication number
- CN107794919A CN107794919A CN201711086812.2A CN201711086812A CN107794919A CN 107794919 A CN107794919 A CN 107794919A CN 201711086812 A CN201711086812 A CN 201711086812A CN 107794919 A CN107794919 A CN 107794919A
- Authority
- CN
- China
- Prior art keywords
- core
- hole
- rotary digging
- major diameter
- protective layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
-
- 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
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
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- Engineering & Computer Science (AREA)
- 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)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to rotary digging hole pouring pile construction method, and in particular to the method that protective layer is set at the hole wall in major diameter rotary digging hole.Including：Placed in major diameter rotary digging hole a core, into the gap between rotary digging hole hole and core core is pulled up to certain altitude upwards after casting concrete, concrete initial set, circulation pours and pulled up operation until the core is pulled out completely, thus the concrete forms protective layer at the hole wall in major diameter rotary digging hole.During carrying out hole pile foundation construction, collapse hole, which may often occur, for rotary digging hole causes to influence follow-up construction speed.Protective layer is set at the hole wall in rotary digging hole of the present invention to easy collapse hole, the wall of hole ability in rotary digging hole can be effectively improved, reach the purpose for preventing collapse hole.
Description
Technical field
The present invention relates to a kind of method that protective layer is set at the hole wall in major diameter rotary digging hole.
Background technology
At present, rotary drilling rig due to speed of application it is fast, easy for construction the advantages that, be widely used in hole pile foundation construction
In.But when being drilled using rotary drilling rig, often because geology loosely easily cave in, the hole wall self-stability difference in rotary digging hole etc. because
Element, rotary digging hole often occur collapse hole, influence construction speed.So preventing collapse hole, turn into what be must take into consideration in spiral-digging pore construction
Link.
Protective layer was set to prevent collapse hole at the hole wall in rotary digging hole in the past, the method for use has：
Installation steel pile casting sets protective layer to carry out anti-collapse hole, but the method is only limitted to shallower position, for deep part,
Because steel pile casting retaining wall buried depth can not take out more deeply, the rate of recovery is low, causes construction cost to increase significantly.
The content of the invention
It is an object of the invention to solve the defects of above-mentioned installation steel pile casting method scope of application is small, cost is high.
A further object of the invention, ensure that the hole wall in rotary digging hole is stable, effectively avoid the possibility of collapse hole, accelerate construction
Progress.
In order to realize according to object of the present invention and further advantage, there is provided a kind of hole wall in major diameter rotary digging hole
The method that place sets protective layer, comprises the following steps：
Step 1: placing a core in major diameter rotary digging hole, the core be column structure, its height with it is described greatly
Diameter selects the depth of borehole suitable, and its diameter is slightly less than the internal diameter in the major diameter rotary digging hole, with the core and described
The gap of one fixed width is formed between major diameter rotary digging hole；
Step 2: a certain amount of concrete is poured into the gap so that the gap is filled to the first height；
Step 3: wait certain time so that concrete initial set, then core is pulled up to first height upwards；
Step 4: repeat step two and step 3, until the core is pulled out completely, thus the concrete is big straight
Protective layer is formd at the hole wall in footpath rotary digging hole.
Preferably, the step 3 also includes, and core is pulled up upwards by the way of axially persistently rotating.
Preferably, when pulling up core, core axial-rotation speed is no more than 30 turns per minute.
Preferably, when pulling up core, the speed that core moves up is no more than 10 centimetres of each second.
Preferably, the core is made up of core post and core lid, the core post by several core sections assemble and
Into；Several described core sections have same diameter, are provided with screw rod at any one core section top center, are set at bottom centre
It is equipped with the screw suitable with the spiro rod length；Several described core sections are in mating connection by screw rod screw；The core lid
For half ball-table shape structure, its basal diameter is suitable with the diameter of the core section, and is provided with its bottom centre and the spiral shell
The suitable screw of pole length；The screw in core base portion is engaged company with the screw rod at the top of uppermost core section
Connect.
Preferably, the step 2 also includes, and during casting concrete, is uniformly poured along core tops center.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is construction procedure line frame graph of the present invention；
Fig. 2 is the motion schematic diagram of core when core is pulled up in certain embodiments of the invention；
Fig. 3 is certain embodiments of the invention core mould and the structural representation in major diameter rotary digging hole；
Fig. 3 A are the structural representation of certain embodiments of the invention SMIS die cap；
Fig. 3 B are the structural representation of certain embodiments of the invention SMIS mold segment.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of individual other elements or its combination.
As shown in Figure 1 and Figure 2, the present invention provides a kind of method that protective layer is set at the hole wall in major diameter rotary digging hole, bag
Include
According to the depth in major diameter rotary digging hole 1, the heart places a cylindrical core mold 2 relatively high level with its depth wherein,
And according to the thickness of required protective layer set core 2 diameter so that between core 2 and major diameter rotary digging hole 1 formed with it is required
The suitable gap of protective layer thickness.
The casting concrete into the gap formed so that this gap is filled to the first height, and the amount of concrete can be by
Diameter, the diameter of core 2 and first height in major diameter rotary digging hole 1 determine.Wait certain time so that concrete initial set, then
Core 2 is pulled up into first height upwards.Repeat above-mentioned cast mixed mud and pull up the implementation of core, until core 2
It is pulled out completely.
As shown in figure 3, in some embodiments, core 2 to pull up upwards no more than 10 centimetres of speed each second, while with not
Speed rotation more than 30 turns per minute, with the frictional force for the protection interlayer for reducing core and having been the beginning of coagulation, it will not destroy and have been the beginning of coagulation
Protective layer, ensure that the reliable and stable of the protective layer that has been the beginning of coagulation.
As shown in figure 3, in some embodiments, core 2 is that have core lid 200 and core section 201, core section 202, core section
203rd, core section 204 forms.Core can solid made of any materials and/or open column shape structure, can be integral
It can be formed with the sectional of random length.
As shown in Fig. 3 A, Fig. 3 B, in some embodiments, the bottom of core lid 200 is provided with screw, the top of core section 201 is set
It is equipped with screw rod and its bottom is provided with screw, other core segment structures and core section 201 is identical, the core section positioned at the top
201 and core lid 200 it is in mating connection by screw flight, between each core section also by screw flight it is in mating connection.Should
The fastening direction of rotation that direction of rotation when it is noted that being pulled up by screw flight core in mating connection must and coordinate
Unanimously.Non-integral core, it can be connected by way of stickup, screw flight cooperation, sheath etc. do not change maximum gauge.
As shown in Fig. 2 because there is certain radian on core top so that during filling gap, concrete energy uniform flow.
As described above, according to the present invention, with relatively low construction cost, protection is set at the hole wall in major diameter rotary digging hole
Layer, ensure that the hole wall in rotary digging hole is stable, can effectively solve the problems, such as major diameter rotary digging hole collapse hole, accelerating construction progress.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With.It can be applied to various suitable rotary digging pile wall constructions completely., can be easy for those skilled in the art
Realize other modification in ground.Therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not
It is limited to specific details and shown here as the legend with description.
Claims (6)
1. the method for protective layer is set at the hole wall in major diameter rotary digging hole, it is characterised in that comprise the following steps：
Step 1: placing a core in major diameter rotary digging hole, the core is column structure, its height and the major diameter
Select the depth of borehole suitable, and its diameter is slightly less than the internal diameter in the major diameter rotary digging hole, with the core and described big straight
The gap of one fixed width is formed between the rotary digging hole of footpath；
Step 2: a certain amount of concrete is poured into the gap so that the gap is filled to the first height；
Step 3: wait certain time so that concrete initial set, then core is pulled up to first height upwards；
Step 4: repeat step two and step 3, until the core is pulled out completely, thus the concrete revolves in major diameter
Protective layer is formd at the hole wall of borehole.
2. the method for protective layer is set at the hole wall in major diameter rotary digging hole as claimed in claim 1, it is characterised in that the step
Rapid three also include, and core is pulled up upwards by the way of axially persistently rotating.
3. the method for protective layer is set at the hole wall in major diameter rotary digging hole as claimed in claim 2, including, when pulling up core,
Core axial-rotation speed is no more than 30 turns per minute.
4. the method for protective layer is set at the hole wall in major diameter rotary digging hole as claimed in claim 2, including, when pulling up core,
The speed that core moves up is no more than 10 centimetres of each second.
5. the method for protective layer is set at the hole wall in major diameter rotary digging hole as claimed in claim 1, it is characterised in that the core
Mould is made up of core post and core lid, and the core post is assembled by several core sections；Several described core sections have
Same diameter, screw rod is provided with any one core section top center, is provided with bottom centre suitable with the spiro rod length
Screw；Several described core sections are in mating connection by screw rod screw；The core lid is half ball-table shape structure, and its bottom surface is straight
Footpath is suitable with the diameter of the core section, and the screw suitable with the spiro rod length is provided with its bottom centre；The core
The screw of die cap bottom and the screw rod at the top of uppermost core section are in mating connection.
6. the method for protective layer is set at the hole wall in major diameter rotary digging hole as claimed in claim 5, it is characterised in that the step
Rapid two also include, and during casting concrete, are uniformly poured along core tops center.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708590 | 2017-08-17 | ||
| CN2017107085907 | 2017-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107794919A true CN107794919A (en) | 2018-03-13 |
Family
ID=61549290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711086812.2A Pending CN107794919A (en) | 2017-08-17 | 2017-11-07 | The method that protective layer is set at the hole wall in major diameter rotary digging hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107794919A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700247A (en) * | 2019-09-27 | 2020-01-17 | 中冶交通建设集团有限公司 | Construction method for cast-in-place pile to penetrate through quicksand layer |
| CN114351693A (en) * | 2022-03-02 | 2022-04-15 | 四川志德岩土工程有限责任公司 | Collapse hole underpinning device for rotary excavating cast-in-place pile and underpinning construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02112521A (en) * | 1988-10-20 | 1990-04-25 | Nippon Steel Corp | Construction of cylindrical structure and steel segment therefor |
| CN201588403U (en) * | 2009-10-28 | 2010-09-22 | 上海宝冶建设有限公司 | Core mould used for concrete pore construction |
| CN203782691U (en) * | 2014-04-25 | 2014-08-20 | 安徽省高速公路控股集团有限公司 | Underwater pouring type pipe column provided with retaining wall and internal mold system thereof |
| CN205840329U (en) * | 2016-07-15 | 2016-12-28 | 刘少锋 | A kind of novel pipeline reserves sleeve pipe |
-
2017
- 2017-11-07 CN CN201711086812.2A patent/CN107794919A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02112521A (en) * | 1988-10-20 | 1990-04-25 | Nippon Steel Corp | Construction of cylindrical structure and steel segment therefor |
| CN201588403U (en) * | 2009-10-28 | 2010-09-22 | 上海宝冶建设有限公司 | Core mould used for concrete pore construction |
| CN203782691U (en) * | 2014-04-25 | 2014-08-20 | 安徽省高速公路控股集团有限公司 | Underwater pouring type pipe column provided with retaining wall and internal mold system thereof |
| CN205840329U (en) * | 2016-07-15 | 2016-12-28 | 刘少锋 | A kind of novel pipeline reserves sleeve pipe |
Non-Patent Citations (2)
| Title |
|---|
| 吴伟民等: "《市政工程施工技术》", 31 January 2013, 厦门大学出版社 * |
| 龙飞主编: "《中文版Pro/ENGINEER Wildfire 3.0入门与提高》", 30 June 2007, 上海科学普及出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700247A (en) * | 2019-09-27 | 2020-01-17 | 中冶交通建设集团有限公司 | Construction method for cast-in-place pile to penetrate through quicksand layer |
| CN114351693A (en) * | 2022-03-02 | 2022-04-15 | 四川志德岩土工程有限责任公司 | Collapse hole underpinning device for rotary excavating cast-in-place pile and underpinning construction method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20180313 |