CN212133471U - A shock-absorbing structure that is used for blasting to advance hole in existing station - Google Patents
A shock-absorbing structure that is used for blasting to advance hole in existing station Download PDFInfo
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- CN212133471U CN212133471U CN202020503342.6U CN202020503342U CN212133471U CN 212133471 U CN212133471 U CN 212133471U CN 202020503342 U CN202020503342 U CN 202020503342U CN 212133471 U CN212133471 U CN 212133471U
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Abstract
The utility model provides a shock-absorbing structure that is used for blasting to advance hole in existing station. Shock-absorbing structure includes along blasting construction hole upper step outer contour line distributed's arc or semi-circular shock insulation groove and hoop a plurality of shock attenuation holes that distribute outside the shock insulation groove, the shock insulation groove is through beat the cell body that adopts the mode blasting of energy-gathering pipe water pressure to form to be 5 ~ 15cm, the horizontal depth 2 ~ 3m after establishing the hole, the aperture of shock attenuation hole is 40 ~ 55mm, and its adjacent interval is 10 ~ 15 cm. The utility model discloses simple structure, construction convenience, shock attenuation hole through the shock insulation groove in inlayer and the outside can effectual reduction blasting impact and blast vibration to blasting entrance to a cave building and pipeline's around the entrance to a cave influence, avoid blasting team entrance to a cave department station main part to bring the damage.
Description
Technical Field
The utility model relates to an underground works technical field especially relates to a secretly dig tunnel and be in high strength granite stratum, all ring edge borders complicacy, and advance the shock-absorbing structure in hole with the blasting of existing station zero distance.
Background
At present, hard rock tunnel underground excavation construction is mainly divided into blasting and non-blasting, and specifically selectable construction methods comprise static blasting hydraulic rock splitter rock cracking construction, static blasting, carbon dioxide gas blasting, cantilever type tunnel boring machine, drilling and blasting methods and the like. The tunnel portal and the station structure are zero distance or close distance, the tunnel geological condition is special, the underground excavation tunnel is in a high-strength granite stratum, and under the condition that the surrounding environment is complex, no matter which blasting method is adopted, the blasting impact and the blasting vibration are difficult to reduce, the main structure of the station at the portal is damaged, particularly, the influence on buildings and pipelines on the upper portion of the blasting portal is larger, and the protection is realized by adopting a damping measure when blasting is performed.
Disclosure of Invention
The utility model discloses the problem that exists according to prior art provides a shock-absorbing structure that is used for blasting to advance hole in existing station, and this shock-absorbing structure can reduce and adopt its blasting impact of the construction method that the blasting advances the hole and the influence of blasting vibration to building and pipeline on blasting entrance to a cave upper portion, avoids blasting team entrance to a cave department station main part to bring the damage.
The utility model discloses a reach above-mentioned purpose, the technical scheme who provides is: the shock absorption structure for blasting in existing stations comprises an arc-shaped or semicircular shock absorption groove and a plurality of shock absorption holes, wherein the arc-shaped or semicircular shock absorption grooves and the plurality of shock absorption holes are distributed outside the shock absorption groove along the outer contour line of an upper step of a blasting construction hole in an annular mode, the shock absorption grooves are groove bodies which are formed by blasting in an energy-gathering pipe water pressure blasting mode after the holes are drilled, the width of each groove body is 5-15 cm, the horizontal depth of each groove body is 2-3 m, the aperture of each shock absorption hole is 40-55 mm, and the adjacent distance of each shock absorption hole is 10-15 cm.
The utility model discloses further technical scheme: the shock absorption hollow holes and the hollow holes forming the shock insulation grooves are formed by drilling through a pneumatic rock drill with the drill diameter of 38-50 mm, and the hole depth is 2-2.5 m; the distance between adjacent empty holes forming the shock insulation groove is 45-55 cm.
The utility model discloses further technical scheme: the explosive charging structure for the energy-collecting pipe hydraulic blasting is composed of a water bag arranged at the bottom of a shock insulation groove hollow hole, an energy-collecting pipe device filled in the shock insulation groove hollow hole and an orifice blocking stemming, and an explosion initiating pipe of the energy-collecting pipe device extends out of the orifice blocking stemming; the length of the energy-gathering pipe device is 1.5m, the loading rice-extending amount is 0.4kg, and the single-hole dosage is 0.6 kg.
The utility model discloses simple structure, construction convenience, shock attenuation hole through the shock insulation groove in inlayer and the outside can effectual reduction blasting impact and blast vibration to blasting entrance to a cave building and pipeline's around the entrance to a cave influence, avoid blasting team entrance to a cave department station main part to bring the damage.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of the distribution of the empty holes of the shock insulation groove of the present invention;
fig. 3 is the charge structure of the hydraulic blasting of the central energy collecting pipe of the utility model.
In the figure: the method comprises the following steps of 1, blasting construction hole upper step outer contour line, 2, shock insulation groove, 3, shock absorption hole, 4, shock insulation groove hole, 5, water bag, 6, energy gathering pipe device, 7, orifice blocking stemming and 8, and is characterized in that the blasting construction hole upper step outer contour line is formed in the blasting construction hole, and the shock insulation groove hole is formed in the blasting construction hole.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. Fig. 1 to 3 are drawings of the embodiment, which are drawn in a simplified manner and are only used for clearly and concisely illustrating the purpose of the embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The embodiment provides a shock-absorbing structure for blasting in an existing station, as shown in fig. 1, the shock-absorbing structure comprises an arc-shaped or semicircular shock-absorbing groove 2 distributed along an outer contour line 1 of an upper step of a blasting construction hole and a plurality of shock-absorbing empty holes 3 distributed outside the shock-absorbing groove 2 in the circumferential direction, the shock-absorbing groove 2 is a groove body which is formed by blasting in an energy-gathering pipe water pressure blasting mode after the empty holes are drilled and has a width of 5-15 cm and a horizontal depth of 2-3 m, the aperture of each shock-absorbing empty hole 3 is 40-55 mm, and the adjacent distance of the shock-absorbing empty holes is 10-15 cm. The shock absorption hollow holes 3 and the hollow holes forming the shock insulation grooves 2 are formed by drilling through a pneumatic rock drill with the drill diameter of 38-50 mm, and the hole depth is 2-2.5 m; the distance between adjacent empty holes forming the shock insulation groove 2 is 45-55 cm. The explosive charging structure for the energy-collecting pipe hydraulic blasting is composed of a water bag 5 arranged at the bottom of a shock insulation groove hollow hole 4, an energy-collecting pipe device 6 filled in the shock insulation groove hollow hole 4 and an orifice plugging stemming 7, and an explosion initiating pipe 8 of the energy-collecting pipe device 6 extends out of the orifice plugging stemming 7.
The embodiment provides a shock-absorbing structure for blasting in an existing station, which comprises the following specific construction steps: firstly, a pneumatic rock drill (with the drill diameter of 38-50 mm) is adopted to drill a row of holes with the diameter of 50mm as damping holes 3 along the excavation contour line of an upper step, the distance between the holes is 10-15 cm (if the hole distance is too close, the adjacent holes are easy to perforate in the construction process and are not suitable to be smaller than 10cm), then a second row of holes with the distance of 50cm are annularly drilled in the damping holes 3, horizontal holes are erected along the contour line, and the hole depth is L which is 2.2m (the single-cycle is advanced to 1.0m, two cycles are ensured), as shown in figure 2. After drilling, blasting is carried out by adopting an energy-collecting tube hydraulic blasting technology (small dosage, uniform volume, small vibration and directional blasting), the charging structure is shown in figure 3, 1 bag of water bag is filled at the bottom of each shock insulation groove hollow hole 4 of the second row, then a 1.5m energy-collecting tube device is filled, and finally stemming is carried out by using stemming. The total number of the blast holes is respectively 1 and 3 sections, wherein the length of the energy collecting pipe is 1.5m, the loading rice extension amount is 0.4kg, the single-hole dosage is 0.6kg, a shock insulation groove 2 with the width of 5-15 cm is finally formed through blasting, the principle is the same as presplitting blasting, obvious cracks are formed among the blast holes after blasting and all the blast holes are cracked, and the maximum blasting vibration velocity adjacent to a building is 1.13 mm/s.
The above description is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (3)
1. The utility model provides a shock-absorbing structure that is used for blasting to advance hole in existing station which characterized in that: shock-absorbing structure includes along arc or semi-circular shock insulation groove (2) and the hoop that blast construction hole upper step outer contour line (1) distributes a plurality of shock attenuation holes (3) outside shaking groove (2), shock insulation groove (2) are the cell body that the width that adopts the mode blasting of gathering energy pipe water pressure to form is 5 ~ 15cm, horizontal depth 2 ~ 3m after establishing the hole through beating, the aperture of shock attenuation hole (3) is 40 ~ 55mm, and its adjacent interval is 10 ~ 15 cm.
2. The shock-absorbing structure for an existing station internal blasting in-tunnel according to claim 1, wherein: the shock absorption hollow holes (3) and the hollow holes forming the shock insulation grooves (2) are formed by drilling through a pneumatic rock drill with the drill diameter of 38-50 mm, and the hole depth is 2-2.5 m; the distance between adjacent empty holes forming the shock insulation groove (2) is 45-55 cm.
3. The shock-absorbing structure for an existing station internal blasting in-tunnel according to claim 1, wherein: the explosive charging structure for the energy-collecting pipe hydraulic blasting is composed of a water bag (5) arranged at the bottom of a shock insulation groove hollow hole (4), an energy-collecting pipe device (6) filled in the shock insulation groove hollow hole (4) and orifice plugging stemming (7), wherein an explosive-starting pipe (8) of the energy-collecting pipe device (6) extends out of the orifice plugging stemming (7); the length of the energy-gathering pipe device (6) is 1.5m, the loading rice-extending amount is 0.4kg, and the single-hole dosage is 0.6 kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020503342.6U CN212133471U (en) | 2020-04-08 | 2020-04-08 | A shock-absorbing structure that is used for blasting to advance hole in existing station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020503342.6U CN212133471U (en) | 2020-04-08 | 2020-04-08 | A shock-absorbing structure that is used for blasting to advance hole in existing station |
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| CN212133471U true CN212133471U (en) | 2020-12-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607014A (en) * | 2021-08-10 | 2021-11-05 | 浙江交工金筑交通建设有限公司 | Composite shock insulation structure for tunnel blasting |
| CN114278307A (en) * | 2021-11-02 | 2022-04-05 | 台州市市政公用工程质量安全事务中心 | Tunnel construction method capable of reducing seismic damage |
| 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 |
| CN114353608A (en) * | 2022-01-14 | 2022-04-15 | 金当量能源科技(山东)有限公司 | Safe ore mining method |
-
2020
- 2020-04-08 CN CN202020503342.6U patent/CN212133471U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607014A (en) * | 2021-08-10 | 2021-11-05 | 浙江交工金筑交通建设有限公司 | Composite shock insulation structure for tunnel blasting |
| CN114278307A (en) * | 2021-11-02 | 2022-04-05 | 台州市市政公用工程质量安全事务中心 | Tunnel construction method capable of reducing seismic damage |
| 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 |
| CN114353608A (en) * | 2022-01-14 | 2022-04-15 | 金当量能源科技(山东)有限公司 | Safe ore mining method |
| CN114353608B (en) * | 2022-01-14 | 2024-03-22 | 金当量能源科技(山东)有限公司 | Safety ore mining method |
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