CN202836384U - Steel pipe pile foundation blasthole for trestle - Google Patents
Steel pipe pile foundation blasthole for trestle Download PDFInfo
- Publication number
- CN202836384U CN202836384U CN201220427134.8U CN201220427134U CN202836384U CN 202836384 U CN202836384 U CN 202836384U CN 201220427134 U CN201220427134 U CN 201220427134U CN 202836384 U CN202836384 U CN 202836384U
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- China
- Prior art keywords
- pipe pile
- trestle
- steel pipe
- pile foundation
- blasthole
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- Expired - Lifetime
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Abstract
A steel pipe pile foundation blasthole for a trestle includes a steel pipe pile foundation and blastholes. Three blastholes are arranged on the circumference of the steel pipe pile foundation. The depth of each of the blastholes is 8 meters, the hole spacing is 2.5 meters, and the array space is 1 meter. The three blastholes form an isosceles triangle and are filled with explosives. The diameter phi of the explosive is 80 millimeters, and the diameter of the broken tablet is 0.4 meter. The steel pipe pile foundation blasthole for the trestle has the advantages of safety, swiftness and economy. A great deal of limited time for a project and river clean-up work is saved, and the safety of the trestle is guaranteed. The steel pipe pile foundation blasthole for trestle can be widely applied to the temporary structure foundation construction in water areas with glossy rockfaces in the foundation construction in deep water.
Description
Technical field
The utility model relates to a kind of high trestle steel pipe pile foundation blast hole.
Background technology
Because the landforms situation in river course makes the change of river water (flow) direction, cause current that the convolution tendency is arranged, a bank washes away another bank alluvial, thereby intectate smooth scar occurs, and this situation is more in deep water construction.Deepwater foundation construction mainly is to construct by pier and trestle passage, and therefore, the construction method of platform and trestle has several method at the intectate place, the one, and construction is beaten concrete filling pile as platform and Conveyor belt.The 2nd, make cover layer, manually be thrown into backfill gravelly soil in the trestle position, artificially make trestle pile foundation cover layer, again injection pile foundation on cover layer.These two kinds of method construction methods all need longer construction period and cost, and the latter also needs carry out the riverbed cleaning after the journey completion, and workload is large.
The utility model content
Its purpose of the utility model just is to provide a kind of high trestle steel pipe pile foundation blast hole, has safe, quick, economic characteristics, and has saved a large amount of durations and stream course clearance, has guaranteed the safety of trestle.Can be widely used in light scar waters temporary structure foundation construction in the deepwater foundation construction.
The technical scheme that realizes above-mentioned purpose and take is, comprises steel-pipe pile and blast hole, and described steel-pipe pile periphery is provided with three blast holes, explosion hole depth 8m, and pitch-row 2.5m, array pitch 1m becomes isosceles triangle, completely puts explosive, explosive diameter phi 80mm, the about 0.4m of broken particle diameter.
Compared with prior art the utlity model has following advantage.
Owing to adopted the blast hole design of isosceles triangle, have safe, quick, economic characteristics, and saved a large amount of durations and stream course clearance, guaranteed the safety of trestle.Can be widely used in light scar waters temporary structure foundation construction in the deepwater foundation construction.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model blast plane schematic diagram.
The specific embodiment
As shown in Figure 1, comprise steel-pipe pile 1 and blast hole 2, described steel-pipe pile 1 periphery is provided with three blast holes 2, blast hole 2 dark 8m, and pitch-row 2.5m, array pitch 1m becomes isosceles triangle, completely puts explosive, explosive diameter phi 80mm, the about 0.4m of broken particle diameter.
The described blast hole 2 triangles layout that when arranged in rows, can be staggered.
Embodiment, certain riverbed, riverbank face is weak weathering argillaceous sandstone, it is the light scar, high trestle steel pipe pile anchors into difficulty, according to construction condition, and argillaceous sandstone intensity is not high, layering is even, broken particle diameter evenly, in the stable characteristics of water performance, adopt the artificial cover layer of method of position control particle diameter explosion rock stratum, as the anchor layer of high trestle steel pipe pile foundation, injection steel-pipe pile on the riverbed after this explosion is guaranteed safety and stability that trestle is constructed.The explosion of position control particle diameter refers to that carrying out hidden hole drilling by the explosion designing requirement on steel pipe pile foundation stake position carries out explosion, and requires the explosion particle diameter less than 400mm, makes steel-pipe pile be convenient to squeeze into.
1, to weak weathering shale grittiness can research
May examine according to the scene, weak weathering mud sandstone even laminating, easy-weathering not in water keeps intensity better, and weathering speed is accelerated after the dehydration, easily is broken into small particle diameter piece stone, forms at last to pulverize grain.
2, control particle diameter blasting scheme design
Three blast holes of each position design, explosion hole depth 8m, pitch-row 2.5m, array pitch 1m, become isosceles triangle, pitch-row is the bottom side length of isosceles triangle, and array pitch is the height of isosceles triangle, completely puts explosive, explosive diameter phi 80mm, the about 0.4m of broken particle diameter, as shown in drawings.The pile tube driving depth is greater than 5m after requiring the riverbed explosion and crushing.
3, explosion bulge test
Design according to explosion, carry out explosion bulge test at bridge axis downstream position, drilling depth 8m is completely put explosive, after explosion is finished, carry out the steel-pipe pile injection by design attitude with the DZ60 vibration hammer, driving depth 3.6m does not meet designing requirement, and phase is felt, taken the photograph to water under the diver, particle diameter has and reaches individually 1m, and is also undesirable.Withdrawal resistance pulls out on employing 25t loop wheel machine carries out, and 15t power is not extracted, and substantially meets the requirements.Need to revise design to explosion, adopt the DZ90 hammer to carry out injection during the injection steel-pipe pile, that guarantees steel-pipe pile anchors into the degree of depth and bearing capacity.
4, steel-pipe pile injection
Through explosion correction design, change array pitch into 1.0m by 2.0m, explosion is carried out in existing trestle steel pipe pile stake position, adopt DZ60 hammer first strike steel-pipe pile, hammer strike-on into shape with DZ90 again, all can squeeze into more than the 5m, meet designing requirement.
5, the monitoring of trestle use procedure
Adopt the artificial cover layer injection of explosion steel pipe to carry out the trestle construction, in use, carrying gross weight 100t car cargo lotus, and the lifting of 50t loop wheel machine, indivedual pile tube maximum settlements are 2cm in two months early stages, meet the design and use requirement.Because the riverbank is to wash away bank, washing away of broken rock is to affect one of stable factor of trestle, and trestle to the monitoring of riverbed face scour survey, without significant change, experiences one time flood in use procedure, and also without obviously washing away, trestle crosses safely flood.Before the construction blasting broken stone is taken a sample, up to the present the river maintenance, does not have the variations such as softening, broken.
Claims (2)
1. one kind high trestle steel pipe pile foundation blast hole, comprise steel-pipe pile (1) and blast hole (2), it is characterized in that described steel-pipe pile (1) periphery is provided with three blast holes (2), the dark 8m of blast hole (2), pitch-row 2.5m, array pitch 1m becomes isosceles triangle, completely puts explosive, explosive diameter phi 80mm, the about 0.4m of broken particle diameter.
2. a kind of high trestle steel pipe pile foundation blast hole according to claim 1 is characterized in that, described blast hole (2) the triangle layout that can be staggered when arranged in rows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220427134.8U CN202836384U (en) | 2012-08-27 | 2012-08-27 | Steel pipe pile foundation blasthole for trestle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220427134.8U CN202836384U (en) | 2012-08-27 | 2012-08-27 | Steel pipe pile foundation blasthole for trestle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836384U true CN202836384U (en) | 2013-03-27 |
Family
ID=47948071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220427134.8U Expired - Lifetime CN202836384U (en) | 2012-08-27 | 2012-08-27 | Steel pipe pile foundation blasthole for trestle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202836384U (en) |
-
2012
- 2012-08-27 CN CN201220427134.8U patent/CN202836384U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
|
| CX01 | Expiry of patent term |