CN106638693A - Dismantling construction method of immersed tunnel steel-pipe pile concrete wall by drilling and blasting - Google Patents
Dismantling construction method of immersed tunnel steel-pipe pile concrete wall by drilling and blasting Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 97
- 238000010276 construction Methods 0.000 title claims abstract description 85
- 238000005422 blasting Methods 0.000 title claims abstract description 51
- 238000013461 design Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000007689 inspection Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 230000000977 initiatory effect Effects 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 57
- 239000004576 sand Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 22
- 238000004880 explosion Methods 0.000 claims description 20
- 238000005474 detonation Methods 0.000 claims description 15
- 239000002360 explosive Substances 0.000 claims description 15
- 239000003814 drug Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 239000011505 plaster Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 231100001261 hazardous Toxicity 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 230000006378 damage Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000012407 engineering method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/04—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by cutting-off under water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0073—Explosives
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- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a dismantling construction method of an immersed tunnel steel-pipe pile concrete wall by drilling and blasting. The method comprises the step of a construction design, the step of construction preparation, the step of erecting a drilling machine platform, the step of locating a drilling machine, the step of drilling construction, the step of hole-forming inspection, the step of agent filling, the step of blasting network connection, the step of alerting, the step of blasting initiation and the step of steel-pipe pile cutting. In the step of agent filling, detonator inspecting and agent bag processing need to be conducted in advance, if hole-forming inspection fails, the step of drilling construction is repeated. After the construction on the shore is completed, the dismantling construction of the steel-pipe pile concrete wall can be started, it is not required that the dismantling construction is started after the construction on land and the construction in water are both completed, and the construction is conducted in advance so that the construction period is shortened; after the steel-pipe pile concrete wall is dismantled, the influence of the wall on the construction in water can be eliminated, the construction in water is easy to conduct, and the period of the construction in water is shortened, and the cost of the construction in water is reduced; compared with the rock drilling technology, the dismantling construction method is high in efficiency and low in cost, and the cost can be effectively reduced by 80% or above.
Description
Technical field
The present invention is applied to immersed tube tunnel steel-pipe pile concrete walls Demolition Construction, particularly removes side, buried depth near water deeper
Concrete walls advantage become apparent from, it is equally applicable in engineerings such as similar diaphragm wall dismounting, controlled blastings.
Background technology
With the development of national economy, immersed tube tunnel has obtained extensive utilization in river-crossing tunnel.Immersed tube tunnel point land
Location and water stage casing, are respectively adopted land dry application work and groove is dug out clearly in underwater construction.Land Duan Heshui stage casings intersection can be beaten
If row's steel-pipe pile, and steel-pipe pile is linked to be into an entirety in steel-pipe pile side one concrete walls of perfusion, define steel-pipe pile
Concrete walls shore protection, plays water proof protective action.Again by steel pipe pile concrete after the completion of the channel excavation of land Duan Heshui stage casings
Wall is removed, and makes groove connect insertion, and finally prefabricated immersed tube is placed in groove, forms immersed tube tunnel.
Because of the impact of engineering geology, environment etc., it is closer that part immersed tube tunnel steel-pipe pile concrete walls shore protection sets position
, there is following difficult point waterside when steel-pipe pile concrete walls shore protection is removed：1st, steel-pipe pile concrete walls are near waterside, it is impossible to adopt
Take land dry application work to be removed；2nd, steel-pipe pile concrete walls are embedded in rock, are connected together with water stage casing rock, due to steel
Pile tube and concrete walls top surface absolute altitude are higher by the water surface, and causing underwater drilling and blasting ship to press close to steel-pipe pile carries out concrete walls drilling, and because
The impact water stage casing of steel-pipe pile cannot construct near a range of reef of steel-pipe pile；3rd, steel-pipe pile and concrete walls are linked to be
One entirety, it is necessary to which first dismantling concrete wall could cutting of steel pile tube；4th, because concrete walls are clipped between steel-pipe pile and rock,
And thickness of wall body is relatively thin, cannot again carry out secondary drilling explosion after onepull, thus using blast working must disposably into
Work(, and the intact of steel-pipe pile is must assure that, it is easy to cutting.
The content of the invention
The technical problem to be solved is to provide one kind and vertical hole is directly drilled through on concrete walls, and adopts
Endoporus outer msdelayed light emission Controlled blasting technique in hole carries out concrete walls explosion, carries out steel-pipe pile cutting disassembling after explosion again, actual
Significantly, concrete walls blasting in once-through is completed construction effect, and degree of fragmentation is good, and is completely disengaged from steel-pipe pile, using latent after explosion
Water person's imderwater cutting steel-pipe pile, smoothly removes steel-pipe pile concrete walls shore protection.
The present invention is achieved through the following technical solutions：A kind of immersed tube tunnel steel-pipe pile concrete walls drillhole blasting is torn open
Except construction method, following steps are specifically included：Detail design, preparation of construction, set up drilling machine platform, rig positioning, drilling construction,
Pore-forming inspection, powder charge, blasting network connection, warning, detonation and steel-pipe pile cutting, wherein, powder charge step needs to carry out in advance
Detonator inspecting and medicated bag are processed, if pore-forming checking step is unqualified, return drilling construction step, if pore-forming inspection is closed
Lattice then make guard aperture action to rig detent mechanism, and drilling construction is also including the detection of perpendicularity.
Used as preferred technical scheme, the detail design includes that blasthole is laid, drilling machine choice and drilling parameter are designed, filled
Medicine is designed and design of firing circuit.
Used as preferred technical scheme, the blasthole is laid to be included the steel-pipe pile of cylindrically shaped, a diameter of 1.25m
Arrangement in alignment, distance about 1-2cm between adjacent steel-pipe pile, concrete walls are close to steel-pipe pile and are poured, thickness about 80cm, are
Optimal demolition effect is reached, blasthole is laid on the axis of concrete walls, lay tier hole, specific design is as follows：1st, two
Root steel-pipe pile adjacent concrete is thicker, and burden is relatively large, therefore, lay a blasthole in two steel-pipe pile adjacents；
Concrete wall thickness (B) is generally less than the distance of center circle (A) between two steel-pipe piles, only in steel-pipe pile adjacent cloth hole
Minimum burden is less than A/2, it is impossible to ensure that the concrete between holes is completely severed, therefore, add one again between holes
Blasthole, therefore blast hole parameter is：Pitch-row：A=A/2, drills away from concrete edge distance：B=B/2.
Used as preferred technical scheme, the drilling machine choice and drilling parameter design are included from the high geology of borehole accuracy
Rig or caterpillar drilling machine can meet construction requirement, and drill bit selects φ 76mm, boring aperture d=80～85mm, drilling depth L：It is super
Cross 1.5 meters below steel-pipe pile cut place.
As preferred technical scheme, powder charge design include single hole explosive payload, single hole explosive payload, list medicated bag dose with
And charge constitution.
Used as preferred technical scheme, the design of firing circuit is led quick-fried using the outer Millisecond Controlled Blasting network of hole endoporus
Pipe selects non-electrical millisecond delay Nonel detonator, and the other dose of single hop and single medicated bag dose for calculating is designed according to powder charge, calculates
The other quantity of Nonel detonator section being actually needed in single hole and consumption, the other Nonel detonator of prioritizing selection segment.
Used as preferred technical scheme, preparation of construction step includes that construction formality is handled, and personnel, equipment, material enter
Field, the selection of rig and the preparation of material.
Used as preferred technical scheme, drilling construction step includes following several concrete steps：
(1), before drilling construction, the bore position of design is labeled on concrete walls by surveying and locating；
(2), rig adjusts erect-position according to the bore position of mark, and accurately drill bit is positioned on bore position, checks
Drilling rod perpendicularity, to meet and start drilling construction after requiring；
(3) quarter observation drilling rod perpendicularity, is taken in boring procedure, drilling, adjustment need to be stopped when perpendicularity deviation is larger
Rig or drilling cramp position, to meet continue after requiring and creep into；
(4) rig that, drills to projected depth need to continue air blowing 2-3 minutes in hole, and drilling rod is done carry up and down drop fortune
It is dynamic, it is ensured that by outside residue blowout hole in hole, drilling rod can be proposed smoothly from hole after stopping the supple of gas or steam；
(5) after, drilling is finished, sticked together with water and detect hole depth and quality, be unsatisfactory for requiring to need hole flushing again, meet vertical after requiring
Seal aperture with timber wedge, it is to avoid blocking blasthole in rubble falling hole；
(6) the step of, rig completes a hole retrodisplacement to next hole, repetition 2-5, until all drillings are completed, institute
Having after the completion of drilling carries out unifying powder charge again.
Used as preferred technical scheme, medicated bag procedure of processing includes following concrete steps：
(1), before detonating material processing, the quantity of various counterweight medicated bags is counted according to design charge constitution, according to system
Meter situation carries out medicated bag processing；
(2) medicated bag processing is clipped in explosive using bamboo chip carries out again colligation formation medicated bag with adhesive plaster；
(3) processing of between-line spacing sand pocket is entered while medicated bag is processed, sand pocket is passed through using the plastic bag for customizing, Φ 90mm
Filling fluvial sand makes sand pocket at interval, sand pocket length 40cm.
Used as preferred technical scheme, powder charge step specifically includes following step：
(1) because using misaligned interval powder charge, adjacent holes charge constitution is different, in order to avoid powder charge error, to dress before powder charge
Medicine personnel be grouped, and is divided to two groups to carry out powder charge, and 1 group is responsible for filling odd number hole, and 2 groups are responsible for filling even numbers hole, two groups respectively by
Two ends start powder charge；
(2) the other Nonel detonator of correspondence section is inserted at the position of medicated bag bottom 1/3 during powder charge, blend compounds cloth colligation sealing
It is good, form detonating material；
(3) by the sequence of loading of design, detonating material is put in hole by aperture.Often put a detonating material to be sticked together inspection with water
Medicated bag situation in place, available bamboo pole force feed not in place in place, discharges and interval sand pocket is put after a detonating material, then puts next rising
Quick-fried body.Each hole installs aperture after medicine and is filled up with sand, and carries a sand pocket in hole top pressure；
(4) after the completion of single hole powder charge, by the detonator in the hole with adhesive plaster colligation together, it is to avoid detonator entanglement；
(5) to prevent blasting flyrock, all holes from installing and covered to blasthole with plank after medicine, then the ballast sand on plank
Bag.
Used as preferred technical scheme, blasting network connection is included in hole after the completion of powder charge, and by special messenger detonation net is carried out
The connection of network, by the direction of setting, the detonator in each hole is together in series with detonator is outreached, and then reconnects electric cap,
Electric cap is connected by cable with initiator, and initiator is placed on safety place.
Used as preferred technical scheme, warning, detonation step include that director, unified command warning, detonation are assigned in scene
Matters, during powder charge, draw warning bar to forbid unrelated person to enter interior；After the completion of powder charge, the alarm signal for withdrawing hazardous area is sent, owned
Personnel and equipment all evacuate to safety zone, guarantee it is safe and punctual after, issued an order detonation by live director.
Used as preferred technical scheme, steel-pipe pile cutting step is as follows, after the completion of explosion, first checks steel-pipe pile stability,
Unstable employing steel plate reinforcement, meets after requiring, you can arrange the cutting of steel-pipe pile, cutting absolute altitude typically should set less than pipe trench
Meter more than bottom absolute altitude 20cm, the steel-pipe pile after cutting is hung by land loop wheel machine or loop wheel machine ship.
The invention has the beneficial effects as follows：(1) this engineering method is by building drilling machine platform or caterpillar drilling machine at the top of concrete walls
Drill through vertical hole, it is ensured that the perpendicularity and hole integrity of drilling, disposable concrete walls demolition blasting is carried out, with fast
The characteristics of speed, efficient and low cost.
(2) using this engineering method land section construction after the completion of can start concrete walls Demolition Construction, without the need for etc. land section
Carry out Demolition Construction after the completion of equal with water stage casing again, be effectively saved the duration.
(3) spaced loading is adopted in blasting hole, dispersibles dose, reduce single medicated bag dose, do not affecting demolition effect
On the premise of, effectively increase the safety of construction.
(4) explosion blow-up point is made more to disperse using dislocation powder charge between adjacent two blasting hole, area of explosion increase,
Improve demolition effect.
(5) using the outer Millisecond Controlled Blasting network of hole endoporus, do not gone here and there as outside for 2,3 sections of Nonel detonator from section
Connection detonator, carries out powder charge from 4 sections of later Nonel detonators in the hole in, in hole Nonel detonator from top to bottom section not by it is little to
Greatly.Using this connection network, can effective control elder generation blast hole adverse effect that rear blast hole is caused, ensure whole blasting network
Effectiveness.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the process chart of the present invention；
Fig. 2 is blasthole layout diagram；
Fig. 3 is immersed tube tunnel pipe trench profile；
Fig. 4 is charge constitution schematic diagram；
Fig. 5 is quick-fried network diagram.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), except non-specifically is chatted
State, can alternative features equivalent by other or with similar purpose replaced.I.e., unless specifically stated otherwise, each feature
It is an example in a series of equivalent or similar characteristics.
As shown in figure 1, including detail design, preparation of construction, setting up drilling machine platform, rig positioning, drilling construction, pore-forming inspection
Look into, powder charge, blasting network connection, warning, detonation and steel-pipe pile cutting, wherein, powder charge step needs to carry out detonator inspection in advance
Survey and medicated bag processing, if pore-forming checking step is unqualified, return drilling construction step, pore-forming inspection is right if qualified
Rig detent mechanism makes guard aperture action, and drilling construction is also including the detection of perpendicularity.
Detail design
Blasthole lays design：Steel-pipe pile is cylinder, and diameter is generally 1.25m, arrangement in alignment, adjacent steel-pipe pile
Between distance about 1-2cm, concrete walls are close to steel-pipe pile and pour, thickness about 80cm.To reach optimal demolition effect, blasthole is laid
On the axis of concrete walls, tier hole is laid, specific design is as follows：
1st, two steel-pipe pile adjacent concrete are thicker, and burden is relatively large, therefore, in two steel-pipe pile adjacent cloth
If a blasthole；
2nd, concrete wall thickness (B) is generally less than the distance of center circle (A) between two steel-pipe piles, only in steel-pipe pile adjacent cloth hole
Minimum burden be less than A/2, it is impossible to ensure that the concrete between holes is completely severed, therefore, add one again between holes
Individual blasthole.
In sum, blast hole parameter is：Pitch-row：A=A/2, drills away from concrete edge distance：B=B/2, as shown in Figure 2.
Drilling machine choice and drilling parameter are designed
Concrete walls thickness is generally 0.8m, and thickness is less, therefore blasthole is unsuitable excessive；But disposable drilling hole depth compared with
Deeply, the less equipment depth in aperture or perpendicularity can not meet the requirement of construction.Through the relative analyses to existing equipment, select
The high geological drilling rig of borehole accuracy or caterpillar drilling machine can meet construction requirement, and drill bit selects φ 76mm, and boring aperture d=80～
85mm, drilling depth L：More than 1.5 meters below steel-pipe pile cut place (generally piping design depth -1.5m).
Powder charge is designed
1st, single hole explosive payload
Concrete walls are connected with water stage casing foundation trench reef explosion reef, and before steel-pipe pile concrete walls are removed, water stage casing is close
Reef near steel-pipe pile concrete walls cannot construct.In concrete walls explosion, the concrete walls for being embedded in rock interior are deposited
In the stop of rock, therefore, explosive need to be considered in two kinds of situation using unit consumption：In rock and outside rock, as shown in Figure 3.
There is the stop of rock rock interior exceptionally side, and with reference to underwater demolition parameter, choosing explosive specific charge is：q11.7～
2.5kg/m3Between；
Belong to explosion near water outside rock, comprehensive reference under water with land blasting parameter, choosing explosive specific charge is：q2
1.0～1.5kg/m3Between；
In sum, single hole explosive payload is calculated as follows：Q=q1aBL1+q2aBL2,
In above formula, a is pitch-row, and L1 is hole depth in rock, and L2 is the outer hole depth of rock；B is concrete walls thickness.
2nd, the other dose of single hop
To reduce harm of the explosion to steel-pipe pile and Adjacent Buildings, it is necessary to strict to control the other dose of single hop.To building
Safe vibration standard reference《Shotfiring safety code 6722-2014》Regulation.
Closure door is had at a certain distance from the segment distance steel-pipe pile concrete walls of immersed tube tunnel land, between closure door and concrete walls
Groove is constructed and is completed, is to ensure to be backfilled with fluvial sand in steel-pipe pile concrete walls shore protection internal and external pressure balance, groove.It is right
The impact of closure door is mainly blasting vibration, and with reference to mass concrete safety criterion is newly poured, age 3d-7d is safe, and vibration standard is
The safe vibration standard of 3.0～7.0cm/s, age 7d-28d is 7.0～12.0cm/s.During blast working, closure door is built and is completed
More than 7 days, construction borehole blasting vibration safety standard was controlled by 4.0cm/s.It is the tunnel of land construction, traffic tunnel after closure door
Road safety criterion of blasting vibration is 12～15cm/s.
According to《Shotfiring safety code 6722-2014》, the other dose of single hop press formula 5.2.3-2 calculating：
Q=(R × (V/K)1/a)3(formula 5.2.3-2)
Q-maximum single hop dose, kg in formula；
R-blow-up point and the distance by protection buildings or structures, m；
V-protection object location allows safely particle vibration velocity, cm/s；
The coefficient and damped expoential of K, α-relevant with the condition such as blow-up point landform, geology, in practice of construction, according to scene
Test determines that concrete walls explosion takes K=180, α=1.8.
Closure door safe distance is calculated according to formula 5.2.3-2 and is shown in Table 5.2.3-1 with the other explosive payload of maximum single hop.
Table 5.2.3-1 closure door safe distances and the other powder charge scale of maximum single hop
V=4.0cm/s
Table 5.2.3-1
Single medicated bag dose
The selection one of single medicated bag dose is to ensure demolition effect；Two is to reduce the destruction to steel-pipe pile.
Concrete walls are close together with steel-pipe pile, and detonation energy is mainly to steel-pipe pile to the harm of steel-pipe pile during explosion
Impact failure, the harm that especially medicated bag cloth sets up an office is maximum.In order to ensure steel pipe pile integrality, steel-pipe pile deformation, rupture are reduced
Situation, by the destruction of control single medicated bag dose and cartridge size come controlled blasting to steel-pipe pile.Through multiple explosion bulge test system
Meter, selects the emulsion of Φ 60mm, single medicated bag dose to meet construction requirement less than 5kg.
Because the total dose in single hole is less, if single medicated bag dose is larger, the interval between adjacent medicated bag is just larger, interval
Crossing conference affects global blowup effect, and suitable spacing distance is 1～2m, because pressing the inside and outside two kinds of situations of rock within this range,
Mean allocation medicated bag dose.
Medicated bag interval, the other dose of single hop should be considered in practice of construction and to the protection of steel-pipe pile carrying out single medicated bag medicine
Amount design.Example：When closure door distance is more than 15 meters, single medicated bag dose is 2.4～4.8kg in rock, and single medicated bag dose is outside rock
1.2～2.4kg.
Charge constitution
Spaced loading structure, spacing distance 1-2 rice, using dislocation powder charge between adjacent holes are adopted in blasthole.Adjacent medicine
It is spaced with sand pocket between bag, blasthole top is reserved 1～1.5 meter, and fills up blasthole with sand, as shown in Figure 4.To prevent slungshot, dress
Need to adopt covering methods after the completion of medicine, the measure such as plank or bamboo raft covering, ballast sand pocket can be adopted.
Design of firing circuit
Initiation net is using the outer Millisecond Controlled Blasting network of hole endoporus.Detonator selects non-electrical millisecond delay Nonel detonator
(delay parameter is shown in Table 2).The other dose of single hop calculated according to powder charge design and single medicated bag dose, calculate in single hole and are actually needed
The other quantity of Nonel detonator section and consumption, the other Nonel detonator of prioritizing selection segment.
Because borehole spacing is less, adjacent blast hole priming network design is crossed conference and is caused after front blast hole explosion to rear blast hole
The detonator and charge constitution not detonated is damaged, and affects demolition effect.Therefore, using " big section powder charge, segment are outreached "
Mode.Consider, preferably select 2,3 sections of Nonel detonators to be used as to outreach detonator in construction, from detonator after 4 sections in hole
Detonator carries out powder charge.From top to bottom section is not ascending for Nonel detonator in hole, as shown in Figure 5.
Table 2
Preparation of construction
1st, preparation of construction mainly constructs the handling of formality, and personnel, equipment, material are marched into the arena.
2nd, rig is selected：Rig may be selected caterpillar drilling machine or geological drilling rig.Track-mounted drill easy construction, efficiency
Height, the prioritizing selection caterpillar drilling machine when there is available platform steel-pipe pile concrete walls side；If without during available platform pass through people
Work builds drilling machine platform on steel-pipe pile, installs geological drilling rig and is constructed.
3rd, material prepares：Construction the material requested mainly required drilling rod of drilling, impacter, drill bit and guard aperture plug-hole are used
Timber wedge, pvc pipe, sand etc..Explosive selects No. 2 rock emulsion explosives of good waterproof performance, detonator to prolong from non-electrical msdelayed light emission
Slow detonator.
Set up drilling machine platform
Set up drilling machine platform be in order to rig can smoothly on concrete walls drill, and ensure drill perpendicularity expire
Foot is required.Have simple shore protection in steel-pipe pile concrete walls side, can as the platform for utilizing when, platform is carried out using excavator
Place mat, leveling, meet rig and steadily squat requirement.Simultaneously adjacent steel-pipe pile is welded together with steel plate, increase steel pipe
The stability in the large of stake.When doing platform without available shore protection, drilling machine platform can be built using the artificial welding on steel-pipe pile, this
The lightweight geological drilling rigs of Shi Xuanyong.
Drilling construction
Drilling construction main points：
1st, before drilling construction, the bore position of design is labeled on concrete walls by surveying and locating.
2nd, rig adjusts erect-position according to the bore position of mark, and accurately drill bit is positioned on bore position.Check and bore
Bar perpendicularity, to meet and start drilling construction after requiring.
3rd, quarter observation drilling rod perpendicularity is taken in boring procedure, drilling need to be stopped when perpendicularity deviation is larger, adjustment is bored
Machine or drilling cramp position, to meet continue after requiring and creep into.
4th, the rig that drills to projected depth need to continue air blowing 2-3 minutes in hole, and drilling rod is done carry up and down drop motion,
Ensure that drilling rod can be proposed smoothly from hole after stopping the supple of gas or steam by outside residue blowout hole in hole.
5th, after drilling is finished, sticked together with water and detect hole depth and quality, be unsatisfactory for requiring to need hole flushing again, met after requiring immediately
Aperture is sealed with timber wedge, it is to avoid blocking blasthole in rubble falling hole.
6th, the step of rig completes a hole retrodisplacement to next hole, repetition 2-5, until all drillings are completed.It is all
Carry out again unifying powder charge after the completion of drilling.
Medicated bag is processed
1st, before detonating material processing, the quantity of various counterweight medicated bags is counted (such as 3.6kg medicines according to design charge constitution
Bag 30), carry out medicated bag processing according to statistical conditions.
2nd, medicated bag processing is clipped in explosive using bamboo chip carries out again colligation formation medicated bag with adhesive plaster.
3rd, the processing of between-line spacing sand pocket is entered while medicated bag is processed, sand pocket is using the plastic bag for customizing, Φ 80mm, by dress
Fill out fluvial sand and make sand pocket at interval, sand pocket length 40cm.
Powder charge
1st, because using misaligned interval powder charge, adjacent holes charge constitution is different, in order to avoid powder charge error, to powder charge before powder charge
Personnel are grouped, and are divided to two groups to carry out powder charge.It is responsible for for 1 group filling odd number hole (hole of steel-pipe pile adjacent), is responsible for for 2 groups filling even numbers
Hole (steel-pipe pile just to hole), two group powder charges by two ends respectively.
2nd, the other Nonel detonator of correspondence section is inserted at the position of medicated bag bottom 1/3 during powder charge, blend compounds cloth colligation sealing
It is good, form detonating material.
3rd, by the sequence of loading of design, detonating material is put in hole by aperture.Often put a detonating material to be sticked together inspection with water
Medicated bag situation in place, available bamboo pole force feed not in place is in place.Discharge and interval sand pocket is put after a detonating material, then put next rising
Quick-fried body.Each hole installs aperture after medicine and is filled up with sand, and carries a sand pocket in hole top pressure.
4th, after the completion of single hole powder charge, by the detonator in the hole with adhesive plaster colligation together, it is to avoid detonator entanglement.
5th, to prevent blasting flyrock, all holes from installing and covered to blasthole with plank after medicine, then the ballast sand on plank
Bag.
Initiation net connects
In hole after the completion of powder charge, the connection of initiation net is carried out by special messenger.By the direction of setting, by the detonator in each hole
It is together in series with detonator is outreached, then reconnects electric cap.Electric cap is connected by cable with initiator, and initiator is placed on
Safety place.
Warning, detonation
Assign director, unified command warning, detonation matters in scene.During powder charge, warning bar is drawn to forbid unrelated person to enter interior；
After the completion of powder charge, the alarm signal for withdrawing hazardous area is sent, all personnel and equipment all evacuate to safety zone.Guaranteeing peace
After completely without mistake, issued an order detonation by live director.
Steel-pipe pile cuts
After the completion of explosion, steel-pipe pile stability is first checked, unstable employing steel plate reinforcement is met after requiring, you can peace
The cutting of row's steel-pipe pile, cutting absolute altitude should typically be less than more than piping design bottom absolute altitude 20cm.Steel-pipe pile after cutting is by land
Loop wheel machine or loop wheel machine ship hang.
Foshan City Fen Jiang south of road extensions (Lan Shilu is to abundant and section) immersed segment foundation trench excavation project is Foshan City Fen Jiang Lu
One of bid section of southern extensions (Lan Shilu is to abundant and section) engineering, between Foshan City's billows stone bridge and Dongping Bridge
Conquer east water channel, from north orientation south across Shancheng District and Shunde District.Tunnel adopts the technique of immersed tube tunnel, is subway, highway two after building up
Use tunnel.To enter be provided with river mouth steel-pipe pile concrete walls in the north and south two sides in tunnel, concrete walls are apart from about 5 meters of river bank.
Concrete wall thickness 0.8m, top mark is high 3 meters, 1.25 meters of steel-pipe pile diameter, 1.4 meters of adjacent steel-pipe pile distance of center circle, foundation trench design bottom mark
It is high -19.5 meters.Northern 56 meters of bank concrete walls length, southern 54 meters of bank concrete walls length.After the completion of the section construction of land, water stage casing is not yet complete
Work, is to accelerate the duration, while reducing the impact that steel-pipe pile concrete walls are constructed to water stage casing, plan is carried to steel-pipe pile concrete walls
Front dismounting.
My company puts into 1 track-mounted drill and has successively carried out drillhole blasting construction to the concrete walls of north and south two sides：Work
Journey on October 15th, 2013 goes into operation, the explosion of on November 10th, 2013 completion, drilling adopt caterpillar drilling machine support Cast-in-situ Piles in Sand-filling road surface for
Platform drills to concrete walls, pitch-row 0.7m, 24 meters of hole depth, and southern bank drills 78, and northern bank drills 80.Adopt again after drilling
Explosion has been carried out with misaligned interval powder charge and with the outer msdelayed light emission Controlled blasting technique of hole endoporus.Demolition effect is good, coagulation
Cob wall is kept completely separate with steel-pipe pile, and steel-pipe pile substantially stands intact.Start steel-pipe pile imderwater cutting after the completion of explosion, after cutting
Steel-pipe pile hung using 75t loop wheel machine ships.Do not find that steel-pipe pile is crushed or the difficult feelings lifted by crane during steel-pipe pile cuts handling
Condition, smoothly removes steel-pipe pile concrete walls.
Guangzhou Biological Island-university city's tunnel foundation trench reef blasting works
Guangzhou Biological Island-university city tunnel foundation trench reef blasting works is located at the southeast of Guangzhou, connection Biological Island and big
Xuecheng, tunnel line is in south-north direction, and starting point is located at the center line of road position of Biological Island East and West direction major trunk roads, and terminal is university city
No. 26 tunnels and the intersection point of intermediate ring road.The beginning and the end mileage of engineering is SK0+265～SK0+817, and wide 191m is passed through in total length 552m, centre
Guan Zhou rivers, including the immersed tube and the North section on the bank of 338m of 214m, immersed segment start-stop mileage SK0+603～SK0+817 in water.
On the bank bank section has set steel-pipe pile concrete walls in this engineering north, and 30 meters of concrete walls length is thick 0.8 meter, and wall top mark height+
8 meters.Remove -11.6 meters of bottom absolute altitude.After the completion of the reef blast working of water stage casing, my company employs to steel-pipe pile concrete walls
Drillhole blasting technology is removed.Because operation platform is done in scene without available road surface, my company passes through people on steel-pipe pile
Drilling machine platform has been built in work welding, is drilled on platform using the geological drilling rig of lighter in weight.Drilling parameter：Aperture
80mm, 0.8 meter of pitch-row, 22 meters of drilling depth drills 40 altogether, and construction completes the drillhole blasting construction of concrete walls for 20 days,
Any problem is not found in steel-pipe pile cutting process behind, smoothly removes steel-pipe pile concrete walls.
The present invention adopts Millisecond Controlled Blasting technology, and strict control single hop is other and single medicated bag dose, takes in blasthole and covers
Lid measure, greatly reduces the impact to resident and surrounding enviroment, and construction and environment harmonious coexistence, social benefit have been accomplished conscientiously
Significantly.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, all should be included within the scope of the present invention.Therefore, it is of the invention
The protection domain that protection domain should be limited by claims is defined.
Claims (13)
1. a kind of immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method, it is characterised in that specifically include following
Step：Detail design, preparation of construction, set up drilling machine platform, rig positioning, drilling construction, pore-forming inspection, powder charge, blasting network
Connection, warning, detonation and steel-pipe pile cutting, wherein, powder charge step needs to carry out detonator inspecting and medicated bag processing in advance, into
If hole checking step is unqualified, drilling construction step is returned, pore-forming inspection is made if qualified to rig detent mechanism
Guard aperture action, drilling construction is also including the detection of perpendicularity.
2. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 1, it is characterised in that：
The detail design includes blasthole laying, drilling machine choice and drilling parameter design, powder charge design and design of firing circuit.
3. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 2, it is characterised in that：
The blasthole is laid to be included the steel-pipe pile arrangement in alignment of cylindrically shaped, a diameter of 1.25m, adjacent steel-pipe pile it
Between distance about 1-2cm, concrete walls are close to steel-pipe pile and pour, thickness about 80cm, and to reach optimal demolition effect, blasthole is laid in
On the axis of concrete walls, tier hole is laid, specific design is as follows：1st, two steel-pipe pile adjacent concrete are thicker, support
Anti- line is relatively large, therefore, lay a blasthole in two steel-pipe pile adjacents；
Concrete wall thickness (B) is generally less than the distance of center circle (A) between two steel-pipe piles, only in the minimum of steel-pipe pile adjacent cloth hole
Burden is less than A/2, it is impossible to ensure that the concrete between holes is completely severed, therefore, add a blasthole again between holes,
Therefore blast hole parameter is：Pitch-row：A=A/2, drills away from concrete edge distance：B=B/2.
4. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 2, it is characterised in that：
The drilling machine choice and drilling parameter design include that can meet construction from the high geological drilling rig of borehole accuracy or caterpillar drilling machine wants
Ask, drill bit selects φ 76mm, boring aperture d=80～85mm, drilling depth L：More than 1.5 meters below steel-pipe pile cut place.
5. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 2, it is characterised in that：
The powder charge design includes the other explosive payload of single hole explosive payload, bullet section, single medicated bag dose and charge constitution.
6. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 2, it is characterised in that：
The design of firing circuit selects non-electrical millisecond delay detonator thunder using the outer Millisecond Controlled Blasting network of hole endoporus, detonator
Pipe, the other dose of single hop calculated according to powder charge design and single medicated bag dose, calculate the Nonel detonator being actually needed in single hole
The other quantity of section and consumption, the other Nonel detonator of prioritizing selection segment.
7. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 1, it is characterised in that：
Preparation of construction step includes that construction formality is handled, personnel, equipment, the marching into the arena of material, the selection of rig and material
Prepare.
8. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 1, it is characterised in that：
Drilling construction step includes following several concrete steps：
(1), before drilling construction, the bore position of design is labeled on concrete walls by surveying and locating；
(2), rig adjusts erect-position according to the bore position of mark, and accurately drill bit is positioned on bore position, checks drilling rod
Perpendicularity, to meet and start drilling construction after requiring；
(3) quarter observation drilling rod perpendicularity, is taken in boring procedure, drilling need to be stopped when perpendicularity deviation is larger, adjust rig
Or drilling cramp position, to meet continue after requiring and creep into；
(4) rig that, drills to projected depth need to continue air blowing 2-3 minutes in hole, and drilling rod is done carry up and down drop motion, protect
By outside residue blowout hole in hole, drilling rod can be proposed smoothly card from hole after stopping the supple of gas or steam；
(5) after, drilling is finished, sticked together with water and detect hole depth and quality, be unsatisfactory for requiring to need hole flushing again, met and used immediately after requiring
Timber wedge seals aperture, it is to avoid blocking blasthole in rubble falling hole；
(6) the step of, rig completes a hole retrodisplacement to next hole, repetition 2-5, until all drillings are completed, all brills
Carry out again unifying powder charge after the completion of hole.
9. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 1, it is characterised in that：
Medicated bag procedure of processing includes following concrete steps：
(1), before detonating material processing, the quantity of various counterweight medicated bags is counted according to design charge constitution, according to statistics feelings
Condition carries out medicated bag processing；
(2) medicated bag processing is clipped in explosive using bamboo chip carries out again colligation formation medicated bag with adhesive plaster；
(3) processing of between-line spacing sand pocket is entered while medicated bag is processed, sand pocket is using the plastic bag for customizing, Φ 80mm, by filling
Fluvial sand makes sand pocket at interval, sand pocket length 40cm.
10. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction method as claimed in claim 1, its feature exists
In：Powder charge step specifically includes following step：
(1) because using misaligned interval powder charge, adjacent holes charge constitution is different, in order to avoid powder charge error, to powder charge people before powder charge
Member is grouped, and is divided to two groups to carry out powder charge, is responsible for for 1 group filling odd number hole, is responsible for for 2 groups filling even numbers hole, and two groups are respectively by two ends
Start powder charge；
(2) the other Nonel detonator of correspondence section is inserted at the position of medicated bag bottom 1/3 during powder charge, blend compounds cloth colligation good seal,
Form detonating material；
(3) by the sequence of loading of design, detonating material is put in hole by aperture.Often put a detonating material to be sticked together inspection medicated bag with water
Situation in place, available bamboo pole force feed not in place in place, discharges and interval sand pocket is put after a detonating material, then puts next detonation
Body.Each hole installs aperture after medicine and is filled up with sand, and carries a sand pocket in hole top pressure；
(4) after the completion of single hole powder charge, by the detonator in the hole with adhesive plaster colligation together, it is to avoid detonator entanglement；
(5) to prevent blasting flyrock, all holes from installing and covered to blasthole with plank after medicine, then the ballast sand pocket on plank.
11. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction methods as claimed in claim 1, its feature exists
In：Blasting network connection is included in hole after the completion of powder charge, and by special messenger the connection of initiation net is carried out, by the direction of setting, will
The detonator in each hole is together in series with detonator is outreached, and then reconnects electric cap, and electric cap is connected by cable with initiator
Connect, initiator is placed on safety place.
12. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction methods as claimed in claim 1, its feature exists
In：Warning, detonation step include that director is assigned at scene, and unified command warning, detonation matters during powder charge, draw warning bar to forbid
In unrelated person enters；After the completion of powder charge, the alarm signal for withdrawing hazardous area is sent, all personnel and equipment all evacuate to safety
Region, guarantee it is safe and punctual after, issued an order detonation by live director.
13. immersed tube tunnel steel-pipe pile concrete walls drillhole blasting Demolition Construction methods as claimed in claim 1, its feature exists
In：Steel-pipe pile cutting step is as follows, after the completion of explosion, first checks steel-pipe pile stability, and unstable employing steel plate reinforcement meets
After requirement, you can arrange the cutting of steel-pipe pile, cutting absolute altitude should typically be less than more than piping design bottom absolute altitude 20cm, after cutting
Steel-pipe pile is hung by land loop wheel machine or loop wheel machine ship.
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| CN107084647A (en) * | 2017-05-26 | 2017-08-22 | 江西国泰五洲***工程有限公司 | The blast hole projectile filling method of Building demolition controlled blasting |
| CN107328328A (en) * | 2017-08-24 | 2017-11-07 | 徐州雷鸣民爆器材有限公司 | The blasting method of steel construction |
| CN107762514A (en) * | 2017-10-23 | 2018-03-06 | 洛阳坤宇矿业有限公司 | A kind of method of the pre-powder charge in weak ore body |
| CN108797589A (en) * | 2018-06-08 | 2018-11-13 | 江苏海上龙源风力发电有限公司 | A kind of intertidal zone offshore wind farm steel structure single-pile foundation CUMULATIVE BLASTING dismounting technique |
| CN109537479A (en) * | 2018-10-23 | 2019-03-29 | 河南理工大学 | A kind of stone-laying double curvature arched bridge blasting demolishing method |
| CN110779405A (en) * | 2019-10-21 | 2020-02-11 | 中建五局土木工程有限公司 | Weak disturbance controlled blasting construction system and construction method for foundation pit |
| CN111059970A (en) * | 2019-12-13 | 2020-04-24 | 中铁十八局集团有限公司 | Multistage ultra-deep hole ballast-throwing vibration-control self-stabilizing blasting method for upper step of hard rock in tunnel |
| CN114140968A (en) * | 2021-12-07 | 2022-03-04 | 四川智能建造科技股份有限公司 | Blasting product usage amount early warning system and method |
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| CN107762514A (en) * | 2017-10-23 | 2018-03-06 | 洛阳坤宇矿业有限公司 | A kind of method of the pre-powder charge in weak ore body |
| CN108797589A (en) * | 2018-06-08 | 2018-11-13 | 江苏海上龙源风力发电有限公司 | A kind of intertidal zone offshore wind farm steel structure single-pile foundation CUMULATIVE BLASTING dismounting technique |
| CN109537479A (en) * | 2018-10-23 | 2019-03-29 | 河南理工大学 | A kind of stone-laying double curvature arched bridge blasting demolishing method |
| CN109537479B (en) * | 2018-10-23 | 2020-08-14 | 河南理工大学 | Blasting demolition method for stone-building double-arch bridge |
| CN110779405A (en) * | 2019-10-21 | 2020-02-11 | 中建五局土木工程有限公司 | Weak disturbance controlled blasting construction system and construction method for foundation pit |
| CN110779405B (en) * | 2019-10-21 | 2022-02-11 | 中建五局土木工程有限公司 | Weak disturbance controlled blasting construction system and construction method for foundation pit |
| CN111059970A (en) * | 2019-12-13 | 2020-04-24 | 中铁十八局集团有限公司 | Multistage ultra-deep hole ballast-throwing vibration-control self-stabilizing blasting method for upper step of hard rock in tunnel |
| CN114140968A (en) * | 2021-12-07 | 2022-03-04 | 四川智能建造科技股份有限公司 | Blasting product usage amount early warning system and method |
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