CN113959285A - Plateau bridge pile foundation granite inclined rock shallow hole drilling core blasting construction method - Google Patents
Plateau bridge pile foundation granite inclined rock shallow hole drilling core blasting construction method Download PDFInfo
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- CN113959285A CN113959285A CN202111357091.0A CN202111357091A CN113959285A CN 113959285 A CN113959285 A CN 113959285A CN 202111357091 A CN202111357091 A CN 202111357091A CN 113959285 A CN113959285 A CN 113959285A
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- blasting
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- pile foundation
- hole
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- 238000005422 blasting Methods 0.000 title claims abstract description 59
- 238000010276 construction Methods 0.000 title claims abstract description 59
- 238000005553 drilling Methods 0.000 title claims abstract description 50
- 239000010438 granite Substances 0.000 title claims abstract description 34
- 239000011435 rock Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims abstract description 10
- 239000004575 stone Substances 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000002360 explosive Substances 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/007—Drilling by use of explosives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/10—Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/18—Plugs for boreholes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of bridge pile foundation excavation construction, in particular to a highland bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method. The method comprises the following steps: s1, leveling the field; s2, side positioning holes; s3, drilling: a core-taking machine is used for taking cores and drilling holes at the granite inclined rock-soil stone interface strictly according to the point position of measurement lofting; s4, charging, plugging and blasting; s5, protecting the hole; s6, blasting: the loading amount and the hole depth are reasonably controlled so as to avoid hole collapse caused by overlarge vibration; s7, dynamically optimizing blasting parameters; s8, continuing drilling: and continuing drilling according to the adjusted optimal blasting parameters. The method is safe and controllable, greatly saves the construction cost, shortens the construction period, reduces the construction difficulty, and provides a feasible construction method for the hole forming of the plateau bridge pile foundation granite inclined rock. The method is mainly applied to blasting construction of the beam pile foundation granite inclined rock shallow hole drill core.
Description
Technical Field
The invention relates to the technical field of bridge pile foundation excavation construction, in particular to a highland bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method.
Background
With the continuous development of railway construction, the construction problem under extreme composite geological conditions is gradually involved, so the construction requirement and difficulty of the pile foundation are higher and higher. An impact hole-forming cast-in-place pile construction method is generally adopted in geological condition complex areas such as Tibet and the like. When a bored pile encounters an inclined rock in the construction process, various construction problems such as hole shrinkage, drill jamming, bore inclination and pile breakage often occur. In the face of steep mountain bodies, the conventional pile-forming process faces a plurality of construction problems, the conventional pile-forming construction process cannot meet the field requirements, and the construction of ultra-long piles under special geological conditions such as Tibet and the like cannot be completed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the shallow hole core drilling and blasting construction method for the plateau bridge pile foundation granite inclined rock.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a shallow hole core drilling blasting construction method for plateau bridge pile foundation granite includes the following steps:
s1, leveling the field;
s2, side positioning holes;
s3, drilling: a core-taking machine is used for taking cores and drilling holes at the granite inclined rock-soil stone interface strictly according to the point position of measurement lofting;
s4, charging, plugging and blasting;
s5, protecting the hole;
s6, blasting: the loading amount and the hole depth are reasonably controlled so as to avoid hole collapse caused by overlarge vibration;
s7, dynamically optimizing blasting parameters;
s8, continuing drilling: and continuing drilling according to the adjusted optimal blasting parameters.
In the step S1, the construction site sundries are removed, the construction site is leveled and tamped, drainage is convenient, and the construction site is suitable for personnel operation, mechanical installation and operation, and water, electricity and road tee joints to meet the requirements of construction conditions.
In the step S2, before lofting, slurry in the pile foundation is pumped to a slurry pool, a measurer is arranged to accurately loft the position needing coring and hole drilling, and the hole drilling position is marked by red spray paint.
In the step S3, 4 holes are drilled per square, and the distance is 30-40 cm. The drilling depth is determined by conversion according to the inclination angle of the granite sloping rock, the maximum depth is not more than 40cm, and if the inclination angle is larger, drilling and blasting can be carried out in different times.
In the step S4, after drilling, blowing out by high-pressure wind, loading 2 groups of rock emulsion explosives with a section of 300g, the length of the explosives being 300mm and the diameter phi of 32mm along the coring hole, and after connecting the explosives, plugging the hole opening by using stemming.
In the step S5, after the explosives are connected, the hole is covered by a steel plate with a thickness of 3cm, an iron ring is welded before the steel plate is lifted, and the steel plate is connected with an anchoring steel bar ring pre-embedded in the hole by a steel wire rope, so that safety accidents caused by the fact that gravel rushes out of the hole during blasting are prevented.
In the step S6, after the orifice protection and inspection are well carried out, people and machinery around the orifice are evacuated, the safety distance of surrounding structures is observed, a warning band is arranged at each road junction to send a safety guard to watch, and a certified blasting person adopts a non-electric millisecond detonating tube to detonate to basically level the hard inclined rocks.
In the step S7, after blasting and after cleaning the ballast, the blasting effect and the protection quality are checked and evaluated, and the blasting parameters are continuously corrected by combining the blasting test according to various factors such as the type, the trend, the geological structure, the underground water, the construction progress and the like of the rock, so as to achieve the optimal blasting effect.
And in the step S8, after the granite inclined rock-soil interface is basically leveled, slurry is put into the granite inclined rock-soil interface, and the subsequent procedures of pile construction are continued to be performed according to the conventional drilling and pouring until the pile foundation construction is completed.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a scientific, safe and economic construction method for forming holes in granite inclined rock. When the shallow-hole core drilling blasting method is adopted for constructing the granite inclined rock, the construction method is safe and controllable, the construction cost is greatly saved, the construction period is shortened, the construction difficulty is reduced, and a feasible construction method is provided for the plateau bridge pile foundation granite inclined rock pore-forming.
Drawings
FIG. 1 is a schematic diagram of blasting construction according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method comprises the following steps:
s1, leveling the field;
s2, side positioning holes;
s3, drilling: a core-taking machine is used for taking cores and drilling holes at the granite inclined rock-soil stone interface strictly according to the point position of measurement lofting;
s4, charging, plugging and blasting;
s5, protecting the hole;
s6, blasting: the loading amount and the hole depth are reasonably controlled so as to avoid hole collapse caused by overlarge vibration;
s7, dynamically optimizing blasting parameters;
s8, continuing drilling: and continuing drilling according to the adjusted optimal blasting parameters.
Preferably, in step S1, the construction site is cleared of impurities, leveled and tamped, drainage is facilitated, and the construction site is suitable for personnel operation, mechanical installation and operation, and water, electricity and road three-way connection, so as to meet the requirements of construction conditions.
Preferably, in step S2, before setting out, the mud in the pile foundation is pumped to a mud pool, a measurer is arranged to accurately set out the position where core drilling is required, and the position where the hole drilling is required is marked by red spray paint.
Preferably, in step S3, there are 4 holes per square, and the distance between the holes is 30-40 cm. The drilling depth is determined by conversion according to the inclination angle of the granite sloping rock, the maximum depth is not more than 40cm, and if the inclination angle is larger, drilling and blasting can be carried out in different times.
Preferably, in step S4, after drilling, blowing out with high pressure wind, loading 2 groups of rock emulsion explosives, one section of which is 300g, the length of which is 300mm, and the diameter of which is Φ 32mm, along the coring hole, and after connecting the explosives, plugging the hole opening with stemming.
Preferably, in step S5, after the explosive is connected, the hole is covered with a steel plate with a thickness of 3cm, and the steel plate is lifted and welded with an iron ring, and connected with the anchoring steel ring embedded in the hole by a steel wire rope, so as to prevent safety accidents caused by broken stones rushing out of the hole during blasting.
Preferably, in step S6, after the protection and inspection of the port is completed, people and machinery around the port are evacuated, the safety distance of the surrounding structure is observed, a warning band is arranged at each port to send a security guard to watch, and a certified blasting person detonates by using a non-electric millisecond detonating tube to basically level the hard inclined rock.
Preferably, in step S7, after blasting and after cleaning the ballast, the blasting effect and the protection quality are checked and evaluated, and the blasting parameters are continuously corrected according to various factors such as the type, the trend, the geological structure, the groundwater, the construction progress and the like of the rock in combination with the blasting test, so as to achieve the optimal blasting effect.
Preferably, in step S8, after the granite inclined rock-soil interface is substantially leveled, slurry is put into the granite inclined rock-soil interface, and the subsequent procedures of conventional cast-in-place pile construction are continued until the pile foundation construction is completed.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (9)
1. A shallow hole core drilling blasting construction method for plateau bridge pile foundation granite includes the following steps:
s1, leveling the field;
s2, side positioning holes;
s3, drilling: a core-taking machine is used for taking cores and drilling holes at the granite inclined rock-soil stone interface strictly according to the point position of measurement lofting;
s4, charging, plugging and blasting;
s5, protecting the hole;
s6, blasting: the loading amount and the hole depth are reasonably controlled so as to avoid hole collapse caused by overlarge vibration;
s7, dynamically optimizing blasting parameters;
s8, continuing drilling: and continuing drilling according to the adjusted optimal blasting parameters.
2. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S1, the construction site sundries are removed, the construction site is leveled and tamped, drainage is convenient, and the construction site is suitable for personnel operation, mechanical installation and operation, and water, electricity and road tee joints to meet the requirements of construction conditions.
3. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S2, before lofting, slurry in the pile foundation is pumped to a slurry pool, a measurer is arranged to accurately loft the position needing coring and hole drilling, and the hole drilling position is marked by red spray paint.
4. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S3, 4 holes are drilled per square, and the distance is 30-40 cm. The drilling depth is determined by conversion according to the inclination angle of the granite sloping rock, the maximum depth is not more than 40cm, and if the inclination angle is larger, drilling and blasting can be carried out in different times.
5. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S4, after drilling, blowing out by high-pressure wind, loading 2 groups of rock emulsion explosives with a section of 300g, the length of the explosives being 300mm and the diameter phi of 32mm along the coring hole, and after connecting the explosives, plugging the hole opening by using stemming.
6. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S5, after the explosives are connected, the hole is covered by a steel plate with a thickness of 3cm, an iron ring is welded before the steel plate is lifted, and the steel plate is connected with an anchoring steel bar ring pre-embedded in the hole by a steel wire rope, so that safety accidents caused by the fact that gravel rushes out of the hole during blasting are prevented.
7. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S6, after the orifice protection and inspection are well carried out, people and machinery around the orifice are evacuated, the safety distance of surrounding structures is observed, a warning band is arranged at each road junction to send a safety guard to watch, and a certified blasting person adopts a non-electric millisecond detonating tube to detonate to basically level the hard inclined rocks.
8. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: in the step S7, after blasting and after cleaning the ballast, the blasting effect and the protection quality are checked and evaluated, and the blasting parameters are continuously corrected by combining the blasting test according to various factors such as the type, the trend, the geological structure, the underground water, the construction progress and the like of the rock, so as to achieve the optimal blasting effect.
9. The plateau bridge pile foundation granite inclined rock shallow hole core drilling blasting construction method of claim 1, characterized by: and in the step S8, after the granite inclined rock-soil interface is basically leveled, slurry is put into the granite inclined rock-soil interface, and the subsequent procedures of pile construction are continued to be performed according to the conventional drilling and pouring until the pile foundation construction is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111357091.0A CN113959285A (en) | 2021-11-16 | 2021-11-16 | Plateau bridge pile foundation granite inclined rock shallow hole drilling core blasting construction method |
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| CN202111357091.0A CN113959285A (en) | 2021-11-16 | 2021-11-16 | Plateau bridge pile foundation granite inclined rock shallow hole drilling core blasting construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953362A (en) * | 2012-12-13 | 2013-03-06 | 中铁上海工程局有限公司 | Bored pile platform built on non-covering steep bare rocks in deep rapids |
| CN105507340A (en) * | 2015-12-10 | 2016-04-20 | 南阳理工学院 | Construction method of bridge pile foundation in mountainous area |
| CN106246108A (en) * | 2015-09-30 | 2016-12-21 | 洛阳武轩重工机械有限公司 | A kind of hard rock coring bit |
| CN107702607A (en) * | 2017-09-27 | 2018-02-16 | 广西建工集团第五建筑工程有限责任公司 | A kind of monoblock type bursting work safty shield and preparation method thereof |
| CN110260741A (en) * | 2019-06-14 | 2019-09-20 | 保利新联爆破工程集团有限公司 | A kind of blasting flyrock safety device |
| CN113585254A (en) * | 2021-07-28 | 2021-11-02 | 安徽水安建设集团股份有限公司 | Construction method of cast-in-situ bored pile with upper soft and lower hard inclined boundary stratum |
-
2021
- 2021-11-16 CN CN202111357091.0A patent/CN113959285A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953362A (en) * | 2012-12-13 | 2013-03-06 | 中铁上海工程局有限公司 | Bored pile platform built on non-covering steep bare rocks in deep rapids |
| CN106246108A (en) * | 2015-09-30 | 2016-12-21 | 洛阳武轩重工机械有限公司 | A kind of hard rock coring bit |
| CN105507340A (en) * | 2015-12-10 | 2016-04-20 | 南阳理工学院 | Construction method of bridge pile foundation in mountainous area |
| CN107702607A (en) * | 2017-09-27 | 2018-02-16 | 广西建工集团第五建筑工程有限责任公司 | A kind of monoblock type bursting work safty shield and preparation method thereof |
| CN110260741A (en) * | 2019-06-14 | 2019-09-20 | 保利新联爆破工程集团有限公司 | A kind of blasting flyrock safety device |
| CN113585254A (en) * | 2021-07-28 | 2021-11-02 | 安徽水安建设集团股份有限公司 | Construction method of cast-in-situ bored pile with upper soft and lower hard inclined boundary stratum |
Non-Patent Citations (2)
| Title |
|---|
| 陈亚扁: "对比文件1("浅析桥梁灌注桩斜面岩层施工处理方法", 《河南建材》 * |
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Application publication date: 20220121 |