CN102817373A - Construction process for blasting artificial cover layer of steel tube pile foundation of high trestle - Google Patents
Construction process for blasting artificial cover layer of steel tube pile foundation of high trestle Download PDFInfo
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- CN102817373A CN102817373A CN2012103068242A CN201210306824A CN102817373A CN 102817373 A CN102817373 A CN 102817373A CN 2012103068242 A CN2012103068242 A CN 2012103068242A CN 201210306824 A CN201210306824 A CN 201210306824A CN 102817373 A CN102817373 A CN 102817373A
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Abstract
The invention relates to a construction process for blasting an artificial cover layer of a steel tube pile foundation of a high trestle. A cover layer is made artificially by adopting a method of fixed-point control of a particle size for blasting of a rock layer and is used as an anchoring layer of the steel tube pile foundation of the high trestle, a steel tube pile is arranged on the anchoring layer, the position of the steel tube pile is designed with three blasting holes, the blasting holes are 8m deep, the spacing of the blasting holes is 2.5m, the pitch of the blasting holes is 1m, an isosceles triangle is formed by the blasting holes, the blasting holes are filled with explosives, the diameter of the explosives is 80mm, the crushing particle size is approximately 0.4m, and the tube pile depth is more than 5m after crushing of the rock layer in a blasting manner. The construction process has the advantages of good safety, rapidness and economical performance. Moreover, a large amount of time and watercourse cleaning work can be saved, and the safety of the trestle can be ensured. The construction process can be widely applied in construction of temporary structural foundations in waters with smooth rock surfaces during construction of deepwater foundations.
Description
Technical field
The present invention relates to the artificial tectal construction technology of a kind of high trestle steel pipe pile basis explosion.
Background technology
Because the landforms situation in river course makes the change of river water (flow) direction, cause the current tendency of circling round, a bank washes away another bank alluvial, thereby intectate smooth scar occurs, and this situation is more in deep water is constructed.The deep water foundation construction mainly is to construct through pier and trestle passage, and therefore, the job practices of platform and trestle has several method at the intectate place, the one, and construction is beaten concrete filling pile as platform and trestle basis.The 2nd, make covering layer, be thrown into backfill gravelly soil in the manual work of trestle position, artificially make trestle pile foundation covering layer, again injection pile foundation on covering layer.These two kinds of method job practicess all need longer construction period and cost, and the latter also needs after the journey completion, carry out the riverbed cleaning, and workload is big.
Summary of the invention
Its purpose of the present invention just is to provide a kind of high trestle steel pipe pile basis explosion artificial tectal construction technology, has safe, quick, economic characteristics, and has practiced thrift 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 deep water foundation construction.
The technical scheme that realizes above-mentioned purpose and take does, adopts the artificial covering layer of method of fixed point control particle diameter explosion rock stratum, and as the anchor layer on high trestle steel pipe pile basis, anchor layer is provided with steel pipe pile; Three shot holes of said steel pipe pile stake position design, explosion hole depth 8m, 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 pile tube depth of drive is greater than 5m behind the explosion and crushing of rock stratum.
Compared with prior art the present invention has the following advantages.
Owing to adopted the artificial covering layer of method of fixed point control particle diameter explosion rock stratum, have safe, quick, economic characteristics, and practiced thrift 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 deep water foundation construction.
Description of drawings
Below in conjunction with accompanying drawing the present invention is made further detailed description.
Fig. 1 is a blast plane sketch map of the present invention.
The specific embodiment
As shown in Figure 1, adopt the artificial covering layer of method of fixed point control particle diameter explosion rock stratum, as the anchor layer on high trestle steel pipe pile basis, anchor layer is provided with steel pipe pile 1; Three shot holes 2 of 1 position design of said steel pipe pile, shot hole 2 dark 8m, 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 pile tube depth of drive is greater than 5m behind the explosion and crushing of rock stratum.
The said shot hole 2 triangles layout that when many arranged, can be staggered.
Embodiment, certain riverbed, riverbank face is weak weathering argillaceous sandstone, i.e. light scar; High trestle steel pipe pile anchors into difficulty, and according to construction condition, and argillaceous sandstone intensity is not high, layering is even, broken particle diameter even, the characteristics of stable performance in water; Adopt the artificial covering layer of method of fixed point control particle diameter explosion rock stratum; As the anchor layer on high trestle steel pipe pile basis, injection steel pipe pile on the riverbed after this explosion is guaranteed safety and stability that trestle is constructed.The explosion of fixed point control particle diameter is meant that on steel pipe pile foundation pile position, carrying out hidden hole drilling by the blasting Design requirement 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 speeds up after the dehydration, is prone to be broken into small particle diameter piece stone, forms at last to pulverize grain.
2, control particle diameter blasting scheme design
Three shot 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 is shown in accompanying drawing.The pile tube depth of drive is greater than 5m after requiring the riverbed explosion and crushing.
3, explosion bulge test
According to blasting Design, carry out explosion bulge test, drilling depth 8m at bridge axis downstream position; Completely put explosive, explosion is carried out the steel pipe pile injection by design attitude with the DZ60 vibration hammer after accomplishing; Depth of drive 3.6m does not meet designing requirement, and phase is felt, taken the photograph to water under the diver; Particle diameter has and reaches 1m individually, and is also undesirable.Uplift resistance pulls out on employing 25t loop wheel machine carries out, and 15t power is not extracted, and meets the requirements basically.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, adhere to specification.
5, the monitoring of trestle use
Adopt the artificial covering layer injection of explosion steel pipe to carry out the trestle construction, in use, carry 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 of the riverbank is to wash away bank, washing away of broken rock is to influence one of stable factor of trestle, and trestle washes away the riverbed face in use measures monitoring, and flood is experienced one time in no significant change, does not also have obviously and washes away, and trestle safety is crossed flood.Before the construction blasting broken stone is taken a sample, up to the present the river maintenance, does not have variations such as softening, fragmentation.
Claims (2)
1. the one kind high artificial tectal construction technology of trestle steel pipe pile basis explosion is characterized in that, adopts the artificial covering layer of method of fixed point control particle diameter explosion rock stratum; As the anchor layer on high trestle steel pipe pile basis, anchor layer is provided with steel pipe pile (1), said steel pipe pile (1) stake position design three shot holes (2); Explosion hole depth 8m, pitch-row 2.5m, array pitch 1m; Become isosceles triangle, completely put explosive, explosive diameter phi 80mm; The about 0.4m of broken particle diameter, the pile tube depth of drive is greater than 5m behind the explosion and crushing of rock stratum.
2. the artificial tectal construction technology of a kind of high trestle steel pipe pile basis explosion according to claim 1 is characterized in that, said shot hole (2) the triangle layout that when many arranged, can be staggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103068242A CN102817373A (en) | 2012-08-27 | 2012-08-27 | Construction process for blasting artificial cover layer of steel tube pile foundation of high trestle |
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| CN2012103068242A CN102817373A (en) | 2012-08-27 | 2012-08-27 | Construction process for blasting artificial cover layer of steel tube pile foundation of high trestle |
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| CN102817373A true CN102817373A (en) | 2012-12-12 |
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| CN2012103068242A Pending CN102817373A (en) | 2012-08-27 | 2012-08-27 | Construction process for blasting artificial cover layer of steel tube pile foundation of high trestle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763452A (en) * | 2019-01-17 | 2019-05-17 | 广西新港湾工程有限公司 | A kind of broken reef construction method of underwater hydraulic column |
Citations (3)
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| US20110002741A1 (en) * | 2009-06-30 | 2011-01-06 | William Dennis Nottingham | Modular offshore platforms and associated methods of use and manufacture |
| CN102312442A (en) * | 2011-07-01 | 2012-01-11 | 中铁大桥局股份有限公司 | Construction method of trestle steel pipe pile foundation |
| CN102486090A (en) * | 2010-12-01 | 2012-06-06 | 中国华冶科工集团有限公司 | Method for recovering upper boundary residual mine and forming lower mining cover layer of stope |
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2012
- 2012-08-27 CN CN2012103068242A patent/CN102817373A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110002741A1 (en) * | 2009-06-30 | 2011-01-06 | William Dennis Nottingham | Modular offshore platforms and associated methods of use and manufacture |
| CN102486090A (en) * | 2010-12-01 | 2012-06-06 | 中国华冶科工集团有限公司 | Method for recovering upper boundary residual mine and forming lower mining cover layer of stope |
| CN102312442A (en) * | 2011-07-01 | 2012-01-11 | 中铁大桥局股份有限公司 | Construction method of trestle steel pipe pile foundation |
Non-Patent Citations (2)
| Title |
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| 陆春昌等: "《爆破施工》", 31 March 2010, 重庆大学出版社 * |
| 黄怀朋: "水上栈桥和平台在人造覆盖层中的优化设计", 《铁道工程学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763452A (en) * | 2019-01-17 | 2019-05-17 | 广西新港湾工程有限公司 | A kind of broken reef construction method of underwater hydraulic column |
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Application publication date: 20121212 |