CN111721173A - Bridge group pile foundation shallow hole blasting air bag vibration reduction structure and construction method - Google Patents
Bridge group pile foundation shallow hole blasting air bag vibration reduction structure and construction method Download PDFInfo
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- CN111721173A CN111721173A CN202010630312.6A CN202010630312A CN111721173A CN 111721173 A CN111721173 A CN 111721173A CN 202010630312 A CN202010630312 A CN 202010630312A CN 111721173 A CN111721173 A CN 111721173A
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- 238000005422 blasting Methods 0.000 title claims abstract description 69
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 239000002360 explosive Substances 0.000 claims abstract description 28
- 238000013016 damping Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000007728 cost analysis Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
- F42D5/045—Detonation-wave absorbing or damping means
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- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a bridge pile group foundation shallow hole blasting air bag vibration reduction structure and a construction method, and is characterized by comprising a blast hole (1), wherein an explosive (3) is arranged in the blast hole (1), and air bags (2) are arranged at two ends of the explosive (3). In terms of blasting effect, the blasting effect is good and the influence on work efficiency is small under the vibration reduction measure of the invention. The air bag measures can well achieve the expected damping target, in the actual engineering, the cost analysis is combined, and only 15.6 yuan is added by adopting the air bag measures, so that the air bag becomes the optimal selection for pile group construction blasting damping.
Description
Technical Field
The invention relates to a blasting vibration reduction construction method, in particular to a shallow hole blasting air bag vibration reduction structure of a bridge group pile foundation and a construction method.
Background
The pile group foundation is the most common foundation form in the design of high piers and high towers of high-speed highway bridges in mountainous areas. The shallow hole blasting manual hole digging construction is used as an efficient and economic digging mode under the limitation of terrain, and is widely applied to pile foundation construction of highway bridge groups in mountainous areas. Engineering practices prove that in the process of blasting operation of a pile foundation, partial energy of explosives is transmitted around in the form of seismic waves to generate a seismic effect, when the seismic effect is strong and the wave velocity is high, the protective walls of adjacent pile holes and newly-poured pile body concrete are adversely affected, cracks appear in the protective walls and the pile body concrete, and finally potential safety hazards and potential quality hazards are formed. Therefore, in the shallow blasting excavation construction process of the bridge pile group foundation, blasting vibration reduction measures are needed to be adopted to control blasting vibration transmitted to adjacent piles.
At present, researches on blast damping measures mainly focus on two aspects: firstly, weakening the detonation source, such as reducing the maximum dosage, adjusting the differential time and the like; and secondly, changing the physical properties of the propagation medium, such as excavating vibration reduction grooves, vibration isolation holes and the like. However, in a highway project, piers and towers adopting a group pile foundation are often key work of the project, the requirement on the construction period is high, the work efficiency can be reduced and the construction progress can be delayed by adopting a method of reducing the drug amount to realize vibration reduction, the clear distance between the group pile foundation piles is small, the hole depth is large, and a vibration reduction groove can not be used obviously. Chinese patent 201611211317.5 discloses a vibration-damping blasting method for controlling vibration-damping of slurry in holes of tunnel, which uses bagged slurry to fill holes to achieve the purpose of vibration damping, but the method charges the holes at intervals, the vibration-damping measure for filling holes with slurry bags is not high in the utilization rate of blastholes, and the number of holes in the holes needs to be encrypted to achieve the same blasting effect, which further increases the total explosive loading, and finally leads to the enhancement of explosion source, the reduction of vibration-damping effect and the increase of cost. Meanwhile, the mud bag is complex to manufacture and fill, the labor cost is high, the blocking effect of the mud on the blasting vibration wave is poor compared with that of air, and according to engineering experience, the water pressure blasting has no obvious effect on blasting vibration reduction. .
Disclosure of Invention
The invention aims to provide a shallow hole blasting air bag vibration reduction structure for a bridge pile group foundation and a construction method. The invention has the characteristics of simple structure, low cost and good vibration damping effect.
The technical scheme of the invention is as follows: a vibration damping structure for shallow hole blasting air bags on a bridge pile group foundation comprises a blasthole, wherein explosives are arranged in the blasthole, and air bags are arranged at two ends of the explosives.
According to the shallow hole blasting air bag vibration reduction structure for the bridge pile group foundation, the air bag, the explosive, the air bag and the stemming are sequentially arranged in the blasting hole.
In the shallow hole blasting air bag vibration reduction structure for the bridge pile group foundation, the air bag is cylindrical.
According to the shallow hole blasting air bag vibration reduction structure for the bridge pile group foundation, the length of the air bag is 15-25cm, and the diameter of the air bag is 25-45 mm.
According to the shallow hole blasting air bag vibration reduction structure for the bridge pile group foundation, the length of the air bag is 20cm, and the diameter of the air bag is 35 mm.
According to the shallow hole blasting air bag vibration reduction structure for the bridge pile group foundation, the blast hole comprises the peripheral hole and the cut hole, and the air bag, the explosive, the air bag and the stemming are sequentially arranged in the peripheral hole and the cut hole.
In the shallow hole blasting air bag vibration reduction structure for the bridge pile group foundation, the air bag is a water bag or a mortar bag.
The shallow hole blasting air bag vibration reduction construction method for the bridge pile group foundation comprises the following steps:
A. drilling a blast hole at the blasting position according to the design requirement;
B. inflating and sealing the plastic bag to obtain an air bag;
C. placing an air bag at the bottom of the blast hole, then filling the explosive, then placing the air bag, and then plugging the blast hole with stemming to finish charging;
D. and detonating after safety is confirmed.
The invention has the beneficial effects that: according to the regulations of blasting safety regulations (GB6722-2014), the safe allowable particle vibration speed of underground shallow hole blasting on a traffic tunnel (simulated dado) is 10-20 cm/s, and the allowable particle vibration speed of newly cast mass concrete (simulated pile body concrete) in the 7-day age is 10-12 cm/s. To prove the effectiveness of the method of the invention, the applicant carried out blasting vibration reduction experiments. The experiments were divided into the following two groups:
(1) reference experimental group: the operation is carried out according to the blasting design scheme without any vibration reduction and vibration isolation measures, as shown in figure 2, the left side is a blasting operation hole 7 of a reference experiment, the right side of the blasting operation hole 7 is a wave velocity testing hole 8, a sensor 10 is arranged on a concrete protecting wall 9 of the wave velocity testing hole 8 at the position opposite to the center of a blasting source of the blasting operation hole 7 and at the same elevation, the size of seismic waves generated by blasting when the seismic waves are transmitted to the concrete protecting wall 9 is measured, and the vibration reduction efficiency of the vibration isolation hole and the air bag is evaluated by taking the value as a reference value.
(2) An air bag set: by adopting the method, the air bag is added into the blast hole to form a charging structure of the air bag, the explosive, the air bag and the stemming, and the charging amount of each blast hole and the arrangement position of the sensor are consistent with the reference experiment composition scheme.
The experiment adopts a TC-4850 Blasting vibration meter produced by Chengdu Zhongzhong Ke measurement and control Limited company to carry out Blasting vibration test, the tester is provided with an X, Y and Z three-dimensional integrated speed sensor and three-vector synthesis analysis software (shooting vibration analysis CBVA) software matched with the X, Y and Z three-dimensional integrated speed sensor. The experimental results are as follows:
(1) figure 3 shows the blast vibration waveform
(2) The maximum vibration speed and frequency are shown in Table 1
Table 1 blasting vibration test results
Tab.1 Result of Blasting Vibration Test
As can be seen from Table 1, the vibration frequency generated by the underground shallow-hole blasting is large, the half-wave dominant frequency is above 50Hz, the natural vibration frequency of the structure is usually low, and the influence of the vibration wave frequency on the adjacent pile foundations is small, so that the vibration wave speed is only used as an index for measuring the blasting influence. As can be seen from table 1 and fig. 3, before any vibration reduction measures are taken, the maximum value of the vibration wave speed transmitted to the adjacent pile hole retaining wall by the manual hole digging shallow hole blasting operation reaches 40.82cm/s, which is slightly larger than the theoretical value calculated by the sarofsky formula, and the vibration speed of the mass point is far higher than the allowable mass point for the safety of newly poured mass concrete in a traffic tunnel and 7 days of age specified by blasting safety regulations (GB6722-2014), and the necessity of taking the vibration reduction measures is also proved. By adding the air bag measure, the maximum wave velocity is reduced to 11.89cm/s, the reduction amplitude reaches 70.9 percent, and the requirement of blasting in blasting safety regulations (GB6722-2014) on safe allowable particle vibration velocity of a traffic tunnel and newly poured mass concrete in 7-day age is basically met. Meanwhile, in terms of blasting effect, the blasting effect is good and the influence on work efficiency is small under the vibration reduction measure of the invention.
Experiments show that the air bag measures can well achieve the expected damping target, in the actual engineering, the cost analysis is combined, and only 15.6 yuan is added by adopting the air bag measures, so that the air bag becomes the optimal selection for blasting damping in pile group construction.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a reference experimental plan view;
fig. 3 is a diagram of a burst vibration waveform.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1 of the invention:
a bridge pile group foundation shallow hole blasting air bag vibration reduction structure comprises a blasthole 1, wherein explosives 3 are arranged in the blasthole 1, and air bags 2 are arranged at two ends of the explosives 3.
More specifically, an air bag 2, an explosive 3, an air bag 2 and stemming 4 are sequentially arranged in the blasthole 1.
The air bag 2 is cylindrical, and can also be in the conventional shape, such as an elliptic cylinder, a cuboid or other three-dimensional shapes.
The length of the air bag 2 is 15-25cm, the diameter is 25-45mm, and the vibration reduction effect is good. More preferably, the length of the air bag 2 is 20cm, and the diameter is 35 mm.
According to the design scheme of the blasting blasthole, the blasthole 1 comprises a peripheral hole 5 and a cut hole 6, and an air bag 2, an explosive 3, an air bag 2 and stemming 4 are sequentially arranged in the peripheral hole 5 and the cut hole 6.
The air bag 2 can also be a water bag or a mortar bag.
The shallow hole blasting air bag vibration reduction construction method for the bridge pile group foundation comprises the following steps:
A. drilling a blast hole 1 at a blasting position according to design requirements;
B. inflating and sealing the plastic bag to manufacture an air bag 2;
C. placing an air bag 2 at the bottom of the blast hole 1, then filling explosive 3, then placing the air bag 2, and then plugging the blast hole 1 with stemming 4 to finish charging;
D. and detonating after safety is confirmed.
Example 2 of the invention:
a bridge pile group foundation shallow hole blasting air bag vibration reduction structure comprises a blasthole 1, wherein explosives 3 are arranged in the blasthole 1, and air bags 2 are arranged at two ends of the explosives 3.
More specifically, an air bag 2, an explosive 3, an air bag 2 and stemming 4 are sequentially arranged in the blasthole 1. The air bag 2 is cylindrical.
The length of the air bag 2 is 18-22cm, and the diameter is 30-40 mm.
According to the design scheme of the blasting blasthole, the blasthole 1 comprises a peripheral hole 5 and a cut hole 6, and an air bag 2, an explosive 3, an air bag 2 and stemming 4 are sequentially arranged in the peripheral hole 5 and the cut hole 6.
The bridge pile group foundation shallow hole blasting air bag vibration reduction construction method is as in embodiment 1.
Example 3 of the invention:
a bridge pile group foundation shallow hole blasting air bag vibration reduction structure comprises a blasthole 1, wherein explosives 3 are arranged in the blasthole 1, and air bags 2 are arranged at two ends of the explosives 3.
More specifically, an air bag 2, an explosive 3, an air bag 2 and stemming 4 are sequentially arranged in the blasthole 1, namely the air bags 2 are arranged at two ends of the explosive 3. The air bag 2 is cylindrical.
The length of the air bag 2 is 19-21cm, and the diameter is 33-37 mm.
The bridge pile group foundation shallow hole blasting air bag vibration reduction construction method is as in embodiment 1.
The above description is only for the purpose of illustrating the present invention and the appended claims, and the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (8)
1. A bridge pile group foundation shallow hole blasting air bag vibration reduction structure is characterized by comprising a blast hole (1), wherein an explosive (3) is arranged in the blast hole (1), and air bags (2) are arranged at two ends of the explosive (3).
2. The bridge pile group foundation shallow hole blasting air bag vibration reduction structure according to claim 1, wherein an air bag (2), an explosive (3), an air bag (2) and stemming (4) are sequentially arranged in the blasthole (1).
3. The air bag damping structure for shallow hole blasting of bridge pile group foundation according to claim 1, wherein the air bag (2) is cylindrical.
4. The bridge pile group foundation shallow hole blasting air bag damping structure according to claim 3, wherein the length of the air bag (2) is 15-25cm, and the diameter is 25-45 mm.
5. The air bag damping structure for the shallow hole blasting of the bridge pile group foundation according to claim 4, wherein the length of the air bag (2) is 20cm, and the diameter of the air bag is 35 mm.
6. The bridge pile group foundation shallow hole blasting air bag vibration reduction structure according to claim 1, wherein the blast hole (1) comprises a peripheral hole (5) and a cut hole (6), and an air bag (2), an explosive (3), an air bag (2) and stemming (4) are sequentially arranged in the peripheral hole (5) and the cut hole (6).
7. The air bag damping structure for shallow hole blasting of bridge pile group foundation according to claim 1, wherein the air bag (2) is a water bag or a mortar bag.
8. The shallow hole blasting air bag vibration reduction construction method for the bridge pile group foundation according to any one of claims 1 to 6, characterized by comprising the following steps:
A. drilling a blast hole (1) at a blasting position according to design requirements;
B. inflating and sealing the plastic bag to manufacture an air bag (2);
C. placing an air bag (2) at the bottom of the blast hole (1), then filling the explosive (3), then placing the air bag (2) and then plugging the blast hole (1) by using stemming (4) to finish charging;
D. and detonating after safety is confirmed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630312.6A CN111721173A (en) | 2020-07-01 | 2020-07-01 | Bridge group pile foundation shallow hole blasting air bag vibration reduction structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010630312.6A CN111721173A (en) | 2020-07-01 | 2020-07-01 | Bridge group pile foundation shallow hole blasting air bag vibration reduction structure and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432569A (en) * | 2020-11-03 | 2021-03-02 | 中建海峡建设发展有限公司 | Hole forming method for punching cast-in-place pile by water bag blasting |
| CN114320309A (en) * | 2021-11-02 | 2022-04-12 | 台州市市政公用工程质量安全事务中心 | Protection mechanism for tunnel construction |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203249554U (en) * | 2013-05-21 | 2013-10-23 | 济宁矿业集团有限公司安居煤矿 | Smooth blasting device |
| CN203837604U (en) * | 2014-05-09 | 2014-09-17 | 攀钢集团工程技术有限公司 | Full-face hole bottom air-spaced loading mechanism for underground roadway tunneling |
| CN105953671A (en) * | 2016-05-09 | 2016-09-21 | 中铁十六局集团第二工程有限公司 | Construction method for excavating siliceous slate stone side slope |
| CN109029175A (en) * | 2018-08-03 | 2018-12-18 | 中交（广州）建设有限公司 | House slight dynamite construction method and blast hole loading structure are worn under subway tunnel low coverage |
| CN109163630A (en) * | 2018-09-20 | 2019-01-08 | 陕西太白黄金矿业有限责任公司 | A kind of loading method of Caving Method with Large Space mining deep hole water pressure blasting explosion |
| CN109612355A (en) * | 2018-12-13 | 2019-04-12 | 西南交通建设集团股份有限公司 | A kind of tunnel excavation water bag method blasting construction method |
| CN109668487A (en) * | 2018-12-07 | 2019-04-23 | 中铁二十局集团第五工程有限公司 | Micro-vibration rock and soil blasting controls construction method |
| CN213455181U (en) * | 2020-07-01 | 2021-06-15 | 贵州省公路工程集团有限公司 | Shallow hole blasting air bag vibration reduction structure for bridge group pile foundation |
-
2020
- 2020-07-01 CN CN202010630312.6A patent/CN111721173A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203249554U (en) * | 2013-05-21 | 2013-10-23 | 济宁矿业集团有限公司安居煤矿 | Smooth blasting device |
| CN203837604U (en) * | 2014-05-09 | 2014-09-17 | 攀钢集团工程技术有限公司 | Full-face hole bottom air-spaced loading mechanism for underground roadway tunneling |
| CN105953671A (en) * | 2016-05-09 | 2016-09-21 | 中铁十六局集团第二工程有限公司 | Construction method for excavating siliceous slate stone side slope |
| CN109029175A (en) * | 2018-08-03 | 2018-12-18 | 中交（广州）建设有限公司 | House slight dynamite construction method and blast hole loading structure are worn under subway tunnel low coverage |
| CN109163630A (en) * | 2018-09-20 | 2019-01-08 | 陕西太白黄金矿业有限责任公司 | A kind of loading method of Caving Method with Large Space mining deep hole water pressure blasting explosion |
| CN109668487A (en) * | 2018-12-07 | 2019-04-23 | 中铁二十局集团第五工程有限公司 | Micro-vibration rock and soil blasting controls construction method |
| CN109612355A (en) * | 2018-12-13 | 2019-04-12 | 西南交通建设集团股份有限公司 | A kind of tunnel excavation water bag method blasting construction method |
| CN213455181U (en) * | 2020-07-01 | 2021-06-15 | 贵州省公路工程集团有限公司 | Shallow hole blasting air bag vibration reduction structure for bridge group pile foundation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432569A (en) * | 2020-11-03 | 2021-03-02 | 中建海峡建设发展有限公司 | Hole forming method for punching cast-in-place pile by water bag blasting |
| CN114320309A (en) * | 2021-11-02 | 2022-04-12 | 台州市市政公用工程质量安全事务中心 | Protection mechanism for tunnel construction |
| CN114320309B (en) * | 2021-11-02 | 2024-04-02 | 台州市市政公用工程质量安全事务中心 | Protection mechanism for tunnel construction |
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