CN104990467A - Digging pile hard rock section combined construction method - Google Patents
Digging pile hard rock section combined construction method Download PDFInfo
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- CN104990467A CN104990467A CN201510264611.1A CN201510264611A CN104990467A CN 104990467 A CN104990467 A CN 104990467A CN 201510264611 A CN201510264611 A CN 201510264611A CN 104990467 A CN104990467 A CN 104990467A
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Abstract
The invention relates to the technical field of a digging pile hard rock section construction method, and discloses a digging pile hard rock section combined construction method used for exploding hard rock sections in a digging pile. The method comprises following construction steps: 1) drilling multiple round holes on the periphery of a hard rock in the digging pile by the use of a drilling machine, wherein the hard rock can form a hard rock column through the multiple round holes, and the hard rock column is circumferentially hung in the air; 2) drilling multiple static detonation holes in the hard rock column; 3) filling the static detonation holes of the hard rock column with static detonation explosives and sealing the static detonation holes; and 4) removing broken stones after the hard rock column cracks. According to the invention, drilling machine drilling construction and static detonation construction are combined in the method, the multiple round holes are drilled by the drilling machine, the hard rock forms the hard rock column, the static detonation holes are filled with the static detonation explosives, then the hard rock column can burst. The construction method can achieve good effects, the hard rock column can be broken rapidly, and the process of digging pile construction can be improved. By employing the method, the construction period is short, the labor intensity is low, and on-site construction management is facilitated.
Description
Technical field
The present invention relates to the technical field of caisson hard rock section constructing method, particularly relate to caisson hard rock section combined construction method.
Background technology
Manually digging hole filling pile is as a kind of traditional bore forming technique, there is easy construction, speed and do not need the advantages such as heavy mechanical equipment Attended Operation, caisson is stronger than concrete driven pile shock resistance, and cost is lower than boring (punching) hole pouring pile.Thus construction of manual-excavation cast-in-place pile method is used widely in highway, civil buildings.
Some regional hard rock scars are risen and fallen large, namely see hard rock scar after the engineering pile perforate of subregion is dark, at present, in construction of manual-excavation cast-in-place pile method, mainly adopt pneumatic pick manually to abolish to hard rock section or explosion two kinds of mode pore-formings.
Hard rock manually abolished by pneumatic pick is be power with compressed air, utilizes the method for percussion fractured rock, can abolish complete, highly weathered rock, but, be difficult to abolish middle weathering and slightly weathered rock.
Explosion hard rock is mainly divided into bright quick-fried and quiet quick-fried two kinds, brightly quick-friedly can produce certain vibrations, when construction site surrounding building is comparatively near or complicated condition time, do not allow or forbid to adopt bright quick-fried; Quiet quick-fried be according to hard rock type, hard rock reasonable distance is holed, static expanding agent is poured in the hole of having bored, static expanding agent generation hydration reaction makes crystal modification, produce volumetric expansion, thus lentamente, quietly expansive force (30Mpa-50Mpa) is applied to hole wall, through reaching maximum after a period of time, after 8 to 12 hours, hard rock is made to produce crack and broken, coordinate artificial or pneumatic pick to be excavated by rock again, this method abolishing hard rock to competent bed as without free free face, its quiet quick-fried weak effect, speed of application is slow, quiet burst into high.
Summary of the invention
The object of the present invention is to provide caisson hard rock section combined construction method, be intended to solve in prior art, in excavation pile construction process, be difficult to abolish hard hard rock, abolish the problem that speed of application is slow and cost is high.
The present invention is achieved in that caisson hard rock section combined construction method, and for abolishing the hard rock section in the stake of hole, it comprises following construction procedure:
1), utilize rig to bore the circumferential apertures of multiple vertical layout along the hard rock periphery in the stake of hole, multiple described circumferential apertures is communicated with continuously, makes described hard rock form the hard rock post of the unsettled layout of circumference;
2), in described hard rock post, multiple quiet blast hole is bored;
3), in the quiet blast hole of described hard rock post quiet quick-fried medicament is filled, and by described quiet blast hole sealing;
4), after described hard rock post parallel off, rubble is known.
Compared with prior art, in caisson hard rock section combined construction method provided by the invention, rig is utilized to drill through multiple circumferential apertures, hard rock is made to form hard rock post, fill quiet quick-fried medicament in conjunction with quiet blast hole again, explosion is realized to hard rock post, combine drill hole of drilling machine construction and quiet quick-fried construction, it has significant advantage advantage in treatment effect, duration, management etc., specific as follows:
1), treatment effect is good; Whole hard rock becomes the hard rock post that surrounding all has smooth free face, chemical reaction and physical change and grain deformation, temperature are raised slowly is there is in quiet quick-fried medicament in quiet blast hole, volumetric expansion, hard rock post is produced disintegrate, finally reach the object abolished, fast that hard rock post is broken, improve excavation pile construction progress;
2), the duration is shorter; Because the intensity of hard rock is higher, adopt and manually abolish labour intensity greatly, efficiency of construction is low, and static(al) explosion can make the duration significantly shorten, and meanwhile, play a role period in the efficacy of a drug, workmen can rest and reorganize, and labour intensity is low;
3), construction management is convenient; This construction method integral construction noise is less than traditional construction technique, less on surrounding enviroment impact, to a certain extent, avoiding periphery complex environment to managing the impact caused, offering convenience to site construction management.
Accompanying drawing explanation
Fig. 1 is the construction process schematic diagram of the caisson hard rock section combined construction method that the embodiment of the present invention provides;
Fig. 2 is the schematic top plan view of the caisson hard rock section associating constructing structure that the embodiment of the present invention provides.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with specific embodiment, realization of the present invention is described in detail.
As shown in Fig. 1 and 2, it is preferred embodiment provided by the invention.
The caisson hard rock section combined construction method that the present embodiment provides, for abolishing hard rock section in the process of artificial hole stake 10, it comprises following construction procedure:
1), utilize in the hard rock of rig in hole stake 10 and bore multiple circumferential apertures, the plurality of circumferential apertures is vertical layout, and is communicated with layout continuously around hard rock circumference, makes hard rock form the unsettled hard rock post 11 of circumference;
2), in hard rock post 11, multiple quiet blast hole 12 is bored;
3), in the quiet blast hole 12 of hard rock post 11 load quiet quick-fried medicament, and seal through quiet blast hole 12, utilize medicament to react explosion hard rock post 11;
4), after hard rock post 11 parallel off, rubble is removed.
In the above-mentioned caisson hard rock section combined construction method provided, rig is utilized to drill through multiple circumferential apertures, hard rock is made to form hard rock post 11, quiet quick-fried medicament is filled again in conjunction with quiet blast hole 12, explosion is realized to hard rock post 11, combined drill hole of drilling machine construction and quiet quick-fried construction, it has significant advantage advantage in treatment effect, duration, management etc., specific as follows:
1), treatment effect is good; Rig drills through circumferential apertures, whole hard rock is become hard rock post 11 that surrounding all has smooth free face, after forming honeycomb free face, is aided with quiet quick-fried operation, quiet blast hole 12 is bored in hard rock post 11, load quiet quick-fried medicament, there is chemical reaction and physical change and grain deformation, temperature are raised slowly in quiet quick-fried medicament, volumetric expansion in quiet blast hole 12, hard rock post 11 is produced disintegrate, finally reach the object abolished, fast that hard rock post 11 is broken, improve caisson 10 construction speed;
2), the duration is shorter; Because the intensity of hard rock is higher, adopt and manually abolish labour intensity greatly, efficiency of construction is low, and static(al) explosion can make the duration significantly shorten, and meanwhile, play a role period in the efficacy of a drug, workmen can rest and reorganize, and labour intensity is low;
3), construction management is convenient; This construction method integral construction noise is less than traditional construction technique, less on surrounding enviroment impact, to a certain extent, avoiding periphery complex environment to managing the impact caused, offering convenience to site construction management.
In above-mentioned construction procedure 1) before, need to carry out preparation of construction, specific as follows:
Before construction, the situations such as reply construction site geological conditions, operating environment, quantities, surrounding enviroment, construction period, weather conditions carry out probe; Hard rock fragmentation is needed to understand hard rock character, joint, trend and groundwater condition; According to field condition tissue cleaning smooth location, complete place sclerosis and close, reserved stake 10 position of portalling, is equipped with enough construction machineries and personnel according to construction period simultaneously; Rig can select power of motor 5.5kw engineering water sharpening machine, and the cylinder drill diameter of water mill rig is approximately 150mm, and complete machine weight is approximately 80kg.
In above-mentioned construction procedure 1) before, need first rig to be fixed in hole stake 10, so that follow-up drilling operation, specific as follows:
First rig is positioned over the position that will bore, utilizes oblique headblock pad to live steel plate bottom rig, can left and right bottom the steel plate of rig and centre is each respectively pads oblique headblock.In addition, in order to avoid rig is drilling through duration of work, occur any swing and rock, being placed with flitch at the top of rig, this flitch mortgage is on the top of rig is very little, and namely flitch is firmly withstood in the top cun of rig.
In above-mentioned construction procedure 1) in, rig, when bringing into operation, arrives hard rock surface and is less than 1cm position bottom the drilling pipe of rig, rotate brake screwed lock jail rig, hand-held operation bar, start power supply, loosen brake screw gently, action bars is transferred gently, and, want slow when the drilling pipe kiss the earth of rig, treat that drilling pipe pierces the hard rock degree of depth and is greater than about 1cm, down can press action bars;
Along with creeping into of drilling pipe, when the top of drilling pipe is less than about 1.5cm apart from hard rock upper surface, rig power supply can be turned off, action bars up shakes, rig shakes to top, and lock jail brake screw, plugs Fixed latches, drilling pipe is rotated with hand, strike drilling pipe with hammer again, drop until hard rock bores core, after getting hard rock brill core, telephone-moving to next position proceeds operation, by that analogy.
In above-mentioned construction procedure 1) and step 2) between, rig, after the circumference of hard rock drills through multiple circumferential apertures, needs cleaning hard rock post 11 periphery float stone, block stone, the surperficial waste water of hard rock post 11, for quiet quick-fried drilling construction provides condition below.
In construction procedure 2) in, the diameter of quiet blast hole 12 and the degree of depth and crushing effect have direct relation, and quiet blast hole 12 is too small, is unfavorable for that quiet quick-fried medicament gives full play to effect; Quiet blast hole 12 is too large, and aperture is difficult to blocking.
Generally, diameter is adopted to be the drill bit of 38mm-42mm, drill through the quiet blast hole 12 that diameter is 38mm-42mm, the degree of depth of quiet blast hole 12 can be selected according to construction requirement, general better at 0.5m, can select 0.4m-0.6m, totally, the aperture of quiet blast hole 12 is other should totally without native rock ballast for the remaining water in quiet blast hole 12 and recrement high-pressure blast purge.
In construction procedure 3) before, need to carry out quiet quick-fried medicament configuration, speed and the temperature of quiet quick-fried medicament reaction have direct relation, and temperature is higher, and the reaction time is faster, otherwise then slow.In practical operation, controlling too fast method of quiet quick-fried medicament reaction time has two kinds: one adds inhibitor in mixing water; Another kind method is the temperature strictly controlling mixing water, dry powder pharmaceutical and hard rock (or concrete).Summer temperature is higher, and tackle the thing that is broken before broken and block, quiet quick-fried medicament is deposited low temperature and entered, and avoids tanning by the sun, and controls below 15 DEG C by the mixing water temperature of quiet quick-fried medicament; Add winter and inspire agent and improve mixing water temperature, mix water temperature is the highest may not exceed 50 DEG C; The reaction time range general control of quiet quick-fried medicament is better at 30mins-60mins, and the good job site of condition according to actual conditions Reaction time shorten, can be beneficial to construction.
In construction procedure 3) in, add in quiet quick-fried medicament 22%-32% (weight ratio) left and right mixing water (concrete amount of water is determined by granular size) mix liquid state after, pour into rapidly in quiet blast hole 12, and guarantee that quiet quick-fried medicament is in dense state in quiet blast hole 12.
When utilizing powder stick to load quiet blast hole 12, should disclose reality one by one, when the quiet quick-fried medicament ratio of mud of coarse granule is adjusted to 0.22-0.25, the mobility of quiet quick-fried medicament is better, and the quiet quick-fried medicament ratio of mud of fine powder mobility about 32% time is better, also can not by disclosing real process.
When hard rock is under the effect of quiet quick-fried medicament, hard rock post 11 can add water, support quiet quick-fried medicament sustained response, can obtain better effect after starting cracking in the crack of hard rock post 11; Each filling group getting it filled, add water, should substantially keep synchronous in mix, pouring process, can allow the maximum swelling pressure of the quiet quick-fried medicament in each quiet blast hole 12 is basic keeps occur the same period, be conducive to the fragmentation of hard rock; The quiet quick-fried medicament of each filling, all will observe and determine whether the temperature of hard rock, quiet quick-fried medicament, mixing water meets the requirements; In pouring process, the quiet quick-fried medicament (performance starts to steam and temperature rises fast) having started to occur chemical reaction does not allow to load in quiet blast hole 12; Add mixing water to filling end from quiet quick-fried medicament, the time of this process can not more than five minutes.
The present embodiment additionally provides caisson hard rock section associating constructing structure, it comprises the multiple circumferential apertures being formed in hole stake 10 hard rock section circumference, multiple quiet blast hole 12 and quiet quick-fried medicament, the plurality of circumferential apertures is vertical distribution, and be communicated with layout continuously, hard rock section is made to form the hard rock post 11 of the unsettled layout of circumference, multiple quiet blast hole 12 is formed in hard rock post 11, and quiet quick-fried medicament is filled in quiet blast hole 12, and quiet blast hole 12 is in sealing shape.
In above-mentioned caisson hard rock section associating constructing structure, can utilize water mill rig etc. in hard rock section, drill through circumferential apertures and quiet blast hole 12, the circumference of hard rock post 11 is utilized to be hanging shape, and quiet quick-fried medicament is filled in quiet blast hole 12, chemical reaction and physical change and make grain deformation is slowly there is in quiet quick-fried medicament in quiet blast hole 12, temperature raises, volumetric expansion, hard rock post 11 is produced disintegrate, finally reach the object abolished, fast that hard rock post 11 is broken, improve caisson 10 construction speed, efficiency of construction is high, and greatly reduce the labour intensity of workmen, in addition, be conducive to construction management, to a certain extent, avoid periphery complex environment to managing the impact caused, offering convenience to site construction management.
In the present embodiment, the diameter range of quiet blast hole 12 is 38mm-42mm, and the degree of depth of quiet blast hole 12 can be selected according to construction requirement, generally better at 0.5m, can select 0.4m-0.6m.
Speed and the temperature of quiet quick-fried medicament reaction have direct relation, and temperature is higher, and the reaction time is faster, otherwise then slow.In practical operation, controlling too fast method of quiet quick-fried medicament reaction time has two kinds: a kind of is add inhibitor in the mixing water of quiet quick-fried medicament; Another kind method is the temperature strictly controlling mixing water, dry powder pharmaceutical and hard rock (or concrete).Summer temperature is higher, and tackle the thing that is broken before broken and block, quiet quick-fried medicament is deposited low temperature and entered, and avoids tanning by the sun, and controls below 15 DEG C by the mixing water temperature of quiet quick-fried medicament; Add winter and inspire agent and improve mixing water temperature, mix water temperature is the highest may not exceed 50 DEG C, and reaction time general control is better at 30mins-60mins, and the good job site of condition according to actual conditions Reaction time shorten, can be beneficial to construction.
In the present embodiment, quiet blast hole 12 is formed in the upper end of hard rock post 11, certainly, according to actual needs, or, quiet blast hole 12 can also be formed in other positions of hard rock post 11; Multiple quiet blast hole 12 is arranged around shape in uniform ring in hard rock post 11, or according to the character of actual explosion needs and hard rock, multiple quiet blast hole 12 also can be other deployment scenarios.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. caisson hard rock section combined construction method, is characterized in that, for abolishing the hard rock section in the stake of hole, it comprises following construction procedure:
1), utilize rig to bore the circumferential apertures of multiple vertical layout along the hard rock periphery in the stake of hole, multiple described circumferential apertures is communicated with continuously, makes described hard rock form the hard rock post of the unsettled layout of circumference;
2), in described hard rock post, multiple quiet blast hole is bored;
3), in the quiet blast hole of described hard rock post quiet quick-fried medicament is filled, and by described quiet blast hole sealing;
4), after described hard rock post parallel off, rubble is known.
2. caisson hard rock section combined construction method as claimed in claim 1, is characterized in that, in construction procedure 1) before, be fixed on by described rig in the stake of hole, the left and right bottom the steel plate of described rig and centre are lined with oblique headblock respectively.
3. caisson hard rock section combined construction method as claimed in claim 2, is characterized in that, be placed with flitch at the top of described rig, and described flitch mortgage is on the top of described rig is very little.
4. the caisson hard rock section combined construction method as described in any one of claims 1 to 3, is characterized in that, the diameter range of described quiet blast hole is 38mm-42mm; The depth bounds of described quiet blast hole is 0.4m-0.6m.
5. the caisson hard rock section combined construction method as described in any one of claims 1 to 3, is characterized in that, the reaction time range of described quiet quick-fried medicament is at 30mins-60mins.
6. the caisson hard rock section combined construction method as described in any one of claims 1 to 3, is characterized in that, in construction procedure 3) in, when described hard rock post starts to ftracture, water filling in the crack of described hard rock post.
7. the caisson hard rock section combined construction method as described in any one of claims 1 to 3, it is characterized in that, in construction procedure 1) in, described rig is when bringing into operation, arrive hard rock surface bottom the drilling pipe of described rig and be less than 1cm position, rotate brake screw locking rig, hand-held operation bar, starts power supply, loosen brake screw, action bars is transferred, until described drilling pipe pierce the hard rock degree of depth be greater than 1cm time, down by described action bars.
8. caisson hard rock section combined construction method as claimed in claim 7, it is characterized in that, in construction procedure 1) in, when the distance from top hard rock upper surface of the drilling pipe of described rig is less than 1.5cm, turn off described rig power supply, up shake described action bars, pin described brake screw, rotate described drilling pipe, drop until the hard rock in described drilling pipe bores core.
9. the caisson hard rock section combined construction method as described in any one of claims 1 to 3, it is characterized in that, in described construction procedure 1) and construction procedure 2) between, described rig after the circumference of hard rock drills through multiple described circumferential apertures, the float stone clearing up described hard rock post circumference and the waste water cleared up on described hard rock post.
10. the caisson hard rock section combined construction method as described in any one of claims 1 to 3, is characterized in that, miscella inhibitor in described quiet quick-fried medicament.
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| CN106351212A (en) * | 2016-08-17 | 2017-01-25 | 中铁建大桥工程局集团第三工程有限公司 | Pile foundation construction method with water drilling and static explosive expansion under rock geological condition |
| CN109579650A (en) * | 2019-01-28 | 2019-04-05 | 中交第二公路工程局有限公司 | A kind of static blasting method of no free boundary rock mass |
| CN110820726A (en) * | 2019-11-18 | 2020-02-21 | 中国葛洲坝集团路桥工程有限公司 | Pile foundation pore-forming method in environment where disturbance is not suitable for surrounding of hard rock in mountainous area |
| CN111705815A (en) * | 2020-05-28 | 2020-09-25 | 三明学院 | Hard rock stratum pre-drilling static blasting man-cut pile auxiliary construction method |
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| CN203687798U (en) * | 2013-11-30 | 2014-07-02 | 西安众智惠泽光电科技有限公司 | Tunnel blasting and excavating construction vehicle |
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| CN102980453A (en) * | 2012-12-12 | 2013-03-20 | 中国水电顾问集团华东勘测设计研究院 | Water injection drilling and blasting method for unloading stress of structural strong rock burst area of horizontal structural surface |
| CN103088832A (en) * | 2013-02-21 | 2013-05-08 | 北京鑫实路桥建设有限公司 | Annular type impact method for digging rock at bottom of drilled pile shaft |
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| CN106351212A (en) * | 2016-08-17 | 2017-01-25 | 中铁建大桥工程局集团第三工程有限公司 | Pile foundation construction method with water drilling and static explosive expansion under rock geological condition |
| CN109579650A (en) * | 2019-01-28 | 2019-04-05 | 中交第二公路工程局有限公司 | A kind of static blasting method of no free boundary rock mass |
| CN110820726A (en) * | 2019-11-18 | 2020-02-21 | 中国葛洲坝集团路桥工程有限公司 | Pile foundation pore-forming method in environment where disturbance is not suitable for surrounding of hard rock in mountainous area |
| CN111705815A (en) * | 2020-05-28 | 2020-09-25 | 三明学院 | Hard rock stratum pre-drilling static blasting man-cut pile auxiliary construction method |
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Application publication date: 20151021 |