CN114319327A - High-fill-area overlong hole digging cylinder-protection-free reinforcing method and grouting device thereof - Google Patents
High-fill-area overlong hole digging cylinder-protection-free reinforcing method and grouting device thereof Download PDFInfo
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- CN114319327A CN114319327A CN202111488306.2A CN202111488306A CN114319327A CN 114319327 A CN114319327 A CN 114319327A CN 202111488306 A CN202111488306 A CN 202111488306A CN 114319327 A CN114319327 A CN 114319327A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 30
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000009412 basement excavation Methods 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
- 238000007569 slipcasting Methods 0.000 claims description 13
- 239000011440 grout Substances 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to a high-fill area overlong hole digging cylinder-protection-free reinforcing method and a grouting device thereof, which comprises the following steps: measuring and positioning; step two: compacting and grouting: drilling the grouting holes by using an anchor rod drilling machine, performing underground excavation on the region of the miscellaneous fill layer by using the anchor rod drilling machine to form the grouting holes, extending the grouting pipes into the holes, performing grouting, and transferring to drilling and grouting of the next grouting hole after grouting is finished until drilling, excavating and grouting of all the grouting holes are finished; step three: hole forming is conducted in a rotary drilling mode: carrying out hole digging operation on the pile foundation position through an anchor rod drilling machine; step four: placing a steel reinforcement cage: placing the reinforcement cage in the pile foundation hole site; pouring and forming a pile: pouring concrete into the pile foundation hole site to form the pile foundation; step six: and (5) maintaining. The invention has the characteristics of improving the peripheral structural strength in the hole digging process, avoiding the hole collapse phenomenon, reducing the construction difficulty, ensuring the stability of the hole wall, improving the hole forming efficiency and the pile foundation quality and the like.
Description
Technical Field
The invention relates to the technical field of civil construction, in particular to a method for reinforcing an overlong excavated protective cylinder-free type high-fill area and a grouting device thereof.
Background
The pile foundation adopts a rotary-excavated hole-forming cast-in-place pile, the construction is positioned in a high-fill area, the length of the pile foundation is about 30 meters because the soil in the high-fill area is not subjected to natural sedimentation, the pile foundation must cross a multi-layer soil layer of miscellaneous fill, strongly weathered rock and medium weathered rock, and a loose soil layer at the upper part is extremely easy to vibrate to form hole collapse in the rotary-excavated drilling or soil dumping process.
Hole phenomenon is prevented appearing collapsing through setting up the mud dado in the conventional operation, but this scheme causes the pollution destruction to the environment easily, secondly selects to use steel casing dado, and this mode can greatly increased cost, the risk of disconnected stake when steel casing plug simultaneously.
In order to solve the above technical problems, a new processing method is actually required.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pile casing-free type reinforcement method for ultra-long excavated holes in a high fill area and a grouting device thereof, which have the characteristics of improving the peripheral structural strength, avoiding hole collapse, reducing construction difficulty, ensuring the stability of hole walls, improving hole forming efficiency and pile foundation quality and the like in the hole excavating process.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for reinforcing the ultra-long excavated hole in the high fill area without the protective cylinder comprises the following steps: measurement and positioning: determining the position of the pile foundation and grouting holes around the pile foundation according to a drawing; step two: compacting and grouting: drilling the grouting holes by using an anchor rod drilling machine, performing underground excavation on the region of the miscellaneous fill layer by using the anchor rod drilling machine to form the grouting holes, extending the grouting pipes into the holes, performing grouting, and transferring to drilling and grouting of the next grouting hole after grouting is finished until drilling, excavating and grouting of all the grouting holes are finished; step three: hole forming is conducted in a rotary drilling mode: carrying out hole digging operation on the pile foundation position through an anchor rod drilling machine; step four: placing a steel reinforcement cage: placing the reinforcement cage in the pile foundation hole site; step five: pouring and forming a pile: pouring concrete into the pile foundation hole site to form the pile foundation; step six: and (5) maintaining.
As a supplement to the technical scheme, grouting holes are arranged along the circumferential direction within the range of 3 outer diameters of 10cm at the position of the pile foundation, and the grouting holes are arranged at intervals of 90 degrees.
As a supplement to the technical scheme, the surface soil layer is observed in the grouting process, and grouting is stopped immediately when the surface soil layer is overflowed by the slurry.
As a supplement to the technical solution, the grouting liquid for grouting uses water: cement 0.5: 1 configuration, the slurry viscosity should be controlled within the range of 80S-90S, the grouting pressure is 0.2-0.3 Mpa, and the grouting flow is preferably 7L/min-10L/min.
The utility model provides a slip casting device of a section of thick bamboo formula reinforcement method is exempted from in overlength hole of digging of high fill district, includes agitator, storage thick liquid pond and grouting pump, and the export of agitator passes through the pipeline and docks with storage thick liquid pond, and the inlet pipe of grouting pump sets up in storage thick liquid pond, and the export of grouting pump passes through the connecting pipe and links to each other with the slip casting pipe, slip casting pipe lower extreme lateral wall be provided with a plurality of grout outlet.
As a supplement to the technical scheme, the grouting pipe is a PVC pipe with the caliber of 50mm, and a plurality of 20-30 mm grout outlet holes are arranged at the distance of 500mm from the bottom to the top.
As a supplement to the technical scheme, the length of the grouting pipe is more than 9 meters.
Has the advantages that: the invention relates to a high fill area overlong digging hole protection-free cylinder type reinforcing method and a grouting device thereof, which have the following advantages:
(1) the construction process is improved, a compaction grouting step is added before rotary drilling for hole forming, soil layers in a high backfill region are hardened and solidified, subsequent hole forming construction is facilitated, compared with a mud wall protection process, a mud pool required by the grouting process is smaller, waste liquid treatment is not needed, and the requirement of civilized construction is met to a greater extent;
(2) compared with a steel casing retaining wall process, the method for reinforcing the soil layer by grouting reduces the operation difficulty and avoids the risk of pile breakage of the pile foundation caused by the ultralong steel casing in the pulling-out process;
(3) the grouting liquid is uniformly pressed into gaps of soil layers filled with miscellaneous earth through the grouting pipes and the grouting holes, and the PVC material pipes are used as the grouting pipes, so that the grouting pipes can be effectively used continuously, the depth requirements of different soil layers can be met, and meanwhile, the PVC pipes are lower in cost than steel pipes, do not need to be recovered after being used for one time, and the purchase cost and the use cost are greatly reduced;
(4) through the water-cement ratio of optimizing the slip casting liquid, under the prerequisite of guaranteeing the viscosity of thick liquid, improve the mobility of thick liquid, ensure can be better enter into the clearance on soil layer, through the osmosis of slip casting liquid, on the one hand in consolidating miscellaneous fill soil, on the other hand also can great improvement pile foundation holistic bearing capacity.
Drawings
FIG. 1 is a schematic view of the present invention in a drilled configuration;
FIG. 2 is a view showing the construction of a grout pipe according to the present invention;
FIG. 3 is a schematic view of the grout pipe of the present invention in situ;
fig. 4 is a diagram of the field grouting operation of the present invention.
In the figure: 1. a jumbolter; 2. a grouting pipe; 3. pile foundation position; 4. a slurry outlet; 5. grouting holes; 6. pile foundation hole sites; 7. a stirring barrel; 8. a pulp storage tank; 9. grouting pump; 10. and (4) connecting the pipes.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The embodiment of the invention relates to a method for reinforcing an overlong dug hole in a high fill area without a protective cylinder, which comprises the following steps of: measurement and positioning: determining the position of the pile foundation and grouting holes around the pile foundation according to a drawing; step two: compacting and grouting: drilling the position of a grouting hole by using an anchor rod drilling machine 1, performing underground excavation on the region of the miscellaneous fill layer by using the anchor rod drilling machine 1 to form a grouting hole 5, then extending a grouting pipe 2 into the grouting hole, performing grouting, and transferring to drilling and grouting of the next grouting hole 5 after grouting is finished until drilling, excavating and grouting of all the grouting holes 5 are finished; step three: hole forming is conducted in a rotary drilling mode: carrying out hole digging operation on the pile foundation position 3 through the anchor rod drilling machine 1; step four: placing a steel reinforcement cage: placing the reinforcement cage in the pile foundation hole site 6; step five: pouring and forming a pile: pouring concrete into the pile foundation hole site 6 to form the pile foundation; step six: and (5) maintaining.
Through setting up four slip casting holes 5 that are close to pile foundation department among this technical scheme to carry out the slip casting through slip casting pipe 2 and fill, make the position that the thick liquid infiltration pile foundation will be arranged, make the bulk strength of this portion structure increase, make things convenient for pile foundation hole site 6 to dig soon, avoid appearing the phenomenon that the hole site lateral wall collapses, reduce the construction degree of difficulty, improve hole site structural strength.
As a supplement to the technical scheme, grouting holes are arranged along the circumferential direction within the range of 10cm of the outer diameter of the pile foundation position 3, and the grouting holes 5 are arranged at intervals of 90 degrees.
Grouting holes 5 are arranged at intervals of 90 degrees, so that grout can smoothly permeate and fill pile foundation positions 3 in the grouting process, and the construction efficiency is improved.
As a supplement to the technical scheme, the surface soil layer is observed in the grouting process, and grouting is stopped immediately when the surface soil layer is overflowed by the slurry.
When the grout overflows the surface soil during grouting, the grout in the hole position of the hole is saturated.
As a supplement to the technical solution, the grouting liquid for grouting uses water: cement 0.5: 1 configuration, the slurry viscosity should be controlled within the range of 80S-90S, the grouting pressure is 0.2-0.3 Mpa, and the grouting flow is preferably 7L/min-10L/min.
The utility model provides a high fill district overlength is dug hole and is exempted from slip casting device of a section of thick bamboo formula reinforcement method, includes agitator 7, mud storage tank 8 and grouting pump 9, and the export of agitator 7 is passed through the pipeline and is docked with mud storage tank 8, and the inlet pipe of grouting pump 9 sets up in mud storage tank 8, and the export of grouting pump 9 passes through connecting pipe 10 and links to each other with slip casting pipe 2, 2 lower extreme lateral walls of slip casting pipe be provided with a plurality of grout outlet 4.
As a supplement to the technical scheme, the grouting pipe 2 is a PVC pipe with the caliber of 50mm, and a plurality of 20-30 mm grout outlet holes are arranged at the distance of 500mm from the bottom to the top.
As a supplement to the present technical solution, the length of the grouting pipe 2 is greater than 9 meters.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The method for reinforcing the ultra-long excavation hole of the high fill area without the protective cylinder and the grouting device thereof provided by the application are introduced in detail, a concrete example is applied in the method for explaining the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (7)
1. A protection-free cylinder type reinforcing method for overlong dug holes in a high fill area comprises the following specific steps:
the method comprises the following steps: measurement and positioning: determining the position of the pile foundation and grouting holes around the pile foundation according to a drawing;
step two: compacting and grouting: drilling the grouting holes through the anchor rod drilling machine (1), performing underground excavation on the miscellaneous fill layer area through the anchor rod drilling machine (1), extending the grouting pipes (2) into the miscellaneous fill layer area after forming the grouting holes (5), then performing grouting, and after grouting is completed, transferring to drilling and grouting of the next grouting hole (5) until drilling, digging and grouting of all the grouting holes (5) are completed;
step three: hole forming is conducted in a rotary drilling mode: carrying out hole digging operation on the pile foundation position (3) through the anchor rod drilling machine (1);
step four: placing a steel reinforcement cage: placing the reinforcement cage in the pile foundation hole site (6);
step five: pouring and forming a pile: pouring concrete into the pile foundation hole site (6) to form the pile foundation;
step six: and (5) maintaining.
2. The method for reinforcing the ultra-long excavated hole in the high fill area without the protective cylinder according to claim 1, wherein the method comprises the following steps: grouting holes are arranged in the pile foundation position (3) within the range of 10cm of outer diameter along the circumferential direction, and the grouting holes (5) are arranged at intervals of 90 degrees.
3. The method for reinforcing the ultra-long excavated hole in the high fill area without the protective cylinder according to claim 1, wherein the method comprises the following steps: and (4) observing the surface soil layer in the grouting process, and stopping grouting immediately when the slurry overflows the surface soil.
4. The method for reinforcing the ultra-long excavated hole in the high fill area without the protective cylinder according to claim 1, wherein the method comprises the following steps: the grouting liquid for grouting adopts water: cement 0.5: 1 configuration, the slurry viscosity should be controlled within the range of 80S-90S, the grouting pressure is 0.2-0.3 Mpa, and the grouting flow is preferably 7L/min-10L/min.
5. The grouting device for the high-fill-area overlong hole digging and protection-free cylinder type reinforcing method according to claim 1, characterized in that: including agitator (7), storage thick liquid pond (8) and grouting pump (9), the export of agitator (7) is through pipeline and storage thick liquid pond (8) butt joint, and the inlet pipe setting of grouting pump (9) is in storage thick liquid pond (8), and the export of grouting pump (9) passes through connecting pipe (10) and links to each other with slip casting pipe (2), slip casting pipe (2) lower extreme lateral wall be provided with a plurality of grout outlet (4).
6. The grouting device for the high fill area overlength hole digging protection-free cylinder type reinforcement method according to claim 5, characterized in that: the grouting pipe (2) is a 50 mm-diameter PVC pipe, and a plurality of 20-30 mm grout outlet holes are arranged at the bottom and the upward distance of 500 mm.
7. The grouting device for the high fill area overlength hole digging protection-free cylinder type reinforcement method according to claim 5, characterized in that: the length of the grouting pipe (2) is more than 9 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488306.2A CN114319327A (en) | 2021-12-07 | 2021-12-07 | High-fill-area overlong hole digging cylinder-protection-free reinforcing method and grouting device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488306.2A CN114319327A (en) | 2021-12-07 | 2021-12-07 | High-fill-area overlong hole digging cylinder-protection-free reinforcing method and grouting device thereof |
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| Publication Number | Publication Date |
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| CN114319327A true CN114319327A (en) | 2022-04-12 |
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| CN202111488306.2A Pending CN114319327A (en) | 2021-12-07 | 2021-12-07 | High-fill-area overlong hole digging cylinder-protection-free reinforcing method and grouting device thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386451A (en) * | 2015-10-16 | 2016-03-09 | 上海市基础工程集团有限公司 | Grouting device for preventing secondary sinking of open caisson |
| CN205116159U (en) * | 2015-10-27 | 2016-03-30 | 贵州开磷建设集团有限公司 | Supporting rig dry process pore -forming bored concrete pile that digs soon of back slip casting |
| CN111472346A (en) * | 2020-04-30 | 2020-07-31 | 中国二十二冶集团有限公司 | Construction method for reinforcing soil around pile body of cast-in-place pile |
| CN113431045A (en) * | 2021-06-11 | 2021-09-24 | 山东鲁泰基础工程有限公司 | Construction method for rotary drilling pore-forming karst leaking stoppage |
-
2021
- 2021-12-07 CN CN202111488306.2A patent/CN114319327A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386451A (en) * | 2015-10-16 | 2016-03-09 | 上海市基础工程集团有限公司 | Grouting device for preventing secondary sinking of open caisson |
| CN205116159U (en) * | 2015-10-27 | 2016-03-30 | 贵州开磷建设集团有限公司 | Supporting rig dry process pore -forming bored concrete pile that digs soon of back slip casting |
| CN111472346A (en) * | 2020-04-30 | 2020-07-31 | 中国二十二冶集团有限公司 | Construction method for reinforcing soil around pile body of cast-in-place pile |
| CN113431045A (en) * | 2021-06-11 | 2021-09-24 | 山东鲁泰基础工程有限公司 | Construction method for rotary drilling pore-forming karst leaking stoppage |
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Application publication date: 20220412 |