CN103726858A - Underground large-scale cave depot project sphere-cylinder combination excavation method - Google Patents
Underground large-scale cave depot project sphere-cylinder combination excavation method Download PDFInfo
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- CN103726858A CN103726858A CN201310735392.1A CN201310735392A CN103726858A CN 103726858 A CN103726858 A CN 103726858A CN 201310735392 A CN201310735392 A CN 201310735392A CN 103726858 A CN103726858 A CN 103726858A
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Abstract
The invention belongs to the technical field of large-scale cave depot project sphere-cylinder combination excavation, particularly relates to an underground large-scale cave depot project sphere-cylinder combination excavation method, and solves the problems about excavation and muck removal of an underground large-scale cave depot sphere-cylinder combination. The method includes the steps: (1) for passage excavation, excavating an upper passage and a lower passage, and excavating a spherical-crown-shaped loading space in the lower part of a tank chamber; (2) for tank cap excavation, excavating downwards from the center of a tank cap to form a shaft to have the tank chamber vertically communicated, directly pushing muck into the shaft, raking the muck in a matched manner, and conveying the muck to a muck disposal area with a dumper from the lower passage, wherein tank cap excavation is carried out in upper and lower parts; (3) for tank body excavation, adopting a down-hole drill to excavate inner rock mass in the middle of a tank body by a method for excavating from the center to the periphery radially step by step, and adopting an air driving drilling machine to excavate the edge of the tank body. All processes are linked orderly, equilibrium in production is realized, multi-process synchronous construction and parallel operation can be carried out, and time limit for a project is guaranteed.
Description
Technical field
The invention belongs to the technical field of large-scale cave depot engineering goalpost assembly excavation, be specifically related to a kind of underground large-scale cave depot engineering goalpost assembly excavation method.
Background technology
For large-scale cave depot engineering goalpost assembly excavation construction, the method adopting is at present: tank cap excavates from center-aisle to both sides vertical bar shaped overall height, tank body substep stage excavation.The shortcoming of the method is:
1) spherical tank cap excavation is highly 7m, and disposable excavation is highly excessive, needs to set up scaffold construction platform in digging process, time-consuming, and is unfavorable for that tank deck preliminary bracing armature boring is installed, steel mesh reinforcement is installed and sprays concrete construction; The excavation from center-aisle to both sides vertical bar shaped, because tank deck excavation line is curve, curvature is changing always, and the control of excavation line style is more difficult.
2) cylindrical tank excavation method substep stage excavation, easily causes long-pending quarrel too much on layering step in digging process, need manually be cut clearly, and construction period lengthens, time-consuming.And after first floor has excavated, during the excavation second layer, because being subject to operation platform limitations restrict, excavation operation easier is larger.Therefore, be necessary it to be optimized and to innovate.
Summary of the invention
The invention provides a kind of underground large-scale cave depot engineering goalpost assembly excavation method, the excavation and the muck removal difficult problem that have solved underground large-scale cave depot goalpost assembly, propose correct excavation method, reasonably procedure arrangement, reduction of erection time, cost-saving, for similar engineering construction provides practical experience.。
The present invention adopts following technical scheme to realize:
A kind of underground large-scale cave depot engineering goalpost assembly excavation method, is characterized in that step is as follows:
1), ground settlement and tunnel,
Adopt full*.face smooth blasting technology, excavation cyclic advance 2.0m, upper channel is excavated to after tank cap, and with wide 5m, the high section excavation to dome edge line is to the opposite side of tank cap; Lower channel is excavated to behind tank chamber, excavates out a spherical entrucking space in bottom, tank chamber;
2), tank cap excavation,
Ground settlement and tunnel is entered behind tank chamber, the downward excavating shaft in Cong Guanmao center, and by tank chamber up/down perforation, quarrel body directly pushes vertical shaft, coordinates and takes off quarrel, from lower channel, with tipping truck, is transported to spoil disposal area; Tank cap excavation divides upper and lower two to carry out, and first excavates tank cap top, limit excavation limit supporting; Tank cap top excavation progressively excavates to both sides along tangent line hoop from center-aisle, every ring width 2m, every ring excavation is shaped as cylinder, and tank deck periphery adopts smooth blasting, the short drilling depth that is controlled at 2 m, weak Blasting Control ball-crown body line style, the same tank body of tank cap bottom excavation method;
Tank cap bottom surface is excavated to 1m under ring beam bottom surface, while avoiding follow-up excavation tank body, the ring beam concrete of newly building is caused to damage, and strictly controls ring beam basement rock position excavation, avoids ring beam basement rock to damage;
3), tank body excavation,
After tank cap excavation, supporting complete, start to carry out the construction of tank cap housing, after housing concrete strength reaches standard value, start to carry out tank body excavation;
Interior Mining in Rock Mass hidden hole drilling in the middle of tank body, the progressively way of mind-set surrounding radiation excavation therefrom, utilizes center vertical shaft for explosion free face, vertical perforating, progressively peels off, and the body that is cut by sliding to bottom sump road under vertical shaft, transport with large-scale muck removal equipment,
Tank body edge adopts gas leg type air drill excavation, utilizes width 3.5m hoop rock zone as job platform, and periphery hole adopts smooth blasting, vertical perforating, successively excavation.
The present invention has following beneficial effect
1), solve excavation and the muck removal difficult problem of underground large-scale cave depot goalpost assembly: underground oil storage has been suspended 30 years in China, tank body is cylinder, tank cap is ball-crown body, excavate highly greatlyr, construction passage is narrow, and buried in underground, construction technology is relatively immature, complicated construction technique, excavation difficulty is larger, muck removal transportation difficulty.Propose the Reasonable of goalpost assembly and correct excavation plan herein, solved excavation and a muck removal difficult problem for underground cavern
2), cost-saving: 1. tank cap divides two-layer excavation, upper strata when excavation, limit excavation limit supporting, with lower floor's scar as operation platform.Reduce scaffold consumption, cost-saving 33826.8 yuan.
2., tank body earthwork approximately 9200 m
3, within the scope of mid diameter 26m, excavation adopts hidden hole drilling, take vertical shaft as free face along surrounding radiation excavation, cost-saved 244728 yuan
3., after tank cap excavation, supporting complete, carry out the construction of tank cap housing, cost-saved 554209.5 yuan
3), duration and quality: adopt above-mentioned excavation technology, solve excavation, the muck removal difficult problem of underground goalpost assembly, made to be connected in order between each procedure, accomplished balanced production, and can carry out multiple operation synchronous construction, parallel operations, make the duration of a project obtain guarantee.Quality aspect, tank cap and the moulding of cylinder excavation are good, and out break value is controlled within the scope of standard allowable variation, and workmanship reaches national construction inspection rules criterion of acceptability.
Accompanying drawing explanation
Fig. 1 is that ground settlement and tunnel is entered tank chamber schematic diagram,
Fig. 2 is the a-a profile of Fig. 1,
Fig. 3 is tank cap excavation schematic diagram,
Fig. 4 is the b-b profile of Fig. 3,
Fig. 5 is tank body excavation schematic diagram,
Fig. 6 is the c-c profile of Fig. 5.
In figure: 1-tank cap portion, 2-vertical shaft, 3-entrucking space, 4-upper channel, 5-lower channel, 6-ring beam basement rock, 7-tank cap top excavation, 8-tank body lower part excavation.
The specific embodiment
The present invention is the excavation method that is arranged in the underground large-scale cave depot goalpost assembly tank chamber of rock mass, is specially adapted to the excavation of the spherical tank cap in underground Large Oil Storage storehouse and cylindrical tank.
Embodiment: 1, underground large-scale cave depot construction status.
This project is underground 6 10000m
3oil storage tank, tank chamber arranges upper and lower two passes, and passage section is the shape of a hoof, and upper channel section is 2.8m × 4.36m, and lower channel section is 4.0m × 3.86m.Tank chamber and passage country rock grade are II level gentle breeze granite gneiss.Cave depot tank chamber excavation overall height is 23.463 m, and tank chamber tank cap is ball-crown body, and the radius of a ball is 29.7 m, spherical crown lower port diameter 32.6m, and rise is 4.873 m.Tank body is the cylinder of high 18.59 m, diameter 31m.It is that 0.8 m, height are interior 0.8 m of ring beam embedding basement rock of 1.344 m that periphery is established wide.
Due to ball-crown body and cylinder assembly more rare, and buried in underground, construction technology is relatively immature, complicated construction technique, excavation difficulty is larger; Underground cavern tank chamber excavation cubic meter of stone amount is larger, approximately 17000 m
3, and passage section is narrow, causes muck removal transportation difficulty.
2, the technical scheme adopting
1), ground settlement and tunnel method
According to design working drawing, tank chamber is designed with upper channel and 2 work planes of lower channel, and lower channel section is 4.0m × 3.86m, and the ventilation smoke exhaust while considering tank chamber excavation need hang 800mm air chimney above passage, and channel height can not meet big machinery to be passed through.Upper channel section is 2.8m × 4.36m, and width only can meet artificial dilly construction.In order to reduce to greatest extent labour, make full use of mechanical work, accelerating construction progress, when construction lower channel, channel bottom digs 0.5m downwards, and during construction upper channel, channel width respectively digs 0.5m to both sides.
Ground settlement and tunnel adopts full*.face smooth blasting technology, excavation cyclic advance 2.0m.Upper channel is excavated to after tank cap, the opposite side with wide 5m, the high section excavation to dome edge line to tank cap.Lower channel is excavated to behind tank chamber, and in bottom, tank chamber, excavating out a radius of a ball is 15.4 m, spherical crown lower port diameter 27m, and rise is the spherical entrucking space of 8 m.Refer to Fig. 1, Fig. 2: ground settlement and tunnel is entered tank chamber schematic diagram.
2), tank cap excavation plan
Ground settlement and tunnel is entered behind tank chamber, and the vertical shaft of the downward digging diameter 3m in Cong Guanmao center, by tank chamber up/down perforation, be beneficial to tank cap portion ballast and slide to entrucking space at the bottom of tank from vertical shaft, quarrel body directly pushes vertical shaft with Z50 loader, and 160 type digging machines coordinate takes off quarrel, from lower channel, with tipping truck, is transported to spoil disposal area.Tank cap excavation divides upper and lower two to carry out, and first excavates tank cap top (excavation height 4.873m), is beneficial to vault supporting, and limit excavation limit supporting, guarantees construction safety.Tank cap top excavation progressively excavates to both sides along tangent line hoop from center-aisle, every ring width 2m, every ring excavation is shaped as cylinder, cylinder and spherical tank deck intersecting lens are annulus, curvature and absolute altitude are definite value, and the control of tank deck excavation line style is easier, and tank deck periphery adopts smooth blasting, short drilling depth (being controlled at 2 m left and right), weak explosion in addition, to meet the control of ball-crown body line style, guarantee that the moulding of ball-crown body excavation is good.The same tank body of tank cap bottom excavation method, is shown in tank body excavation plan.
Tank cap bottom surface is excavated to 1m under ring beam bottom surface, while avoiding follow-up excavation tank body, the ring beam concrete of newly building is caused to damage, and should strictly control ring beam basement rock position excavation, avoids ring beam basement rock to damage.Refer to Fig. 3, Fig. 4: tank cap excavation schematic diagram.
3), tank body excavation plan
After tank cap excavation, supporting complete, start to carry out the construction of tank cap housing, if construct tank cap housing after tank body has excavated, scaffold consumption is excessive, high cost again.After reaching standard value, housing concrete strength starts to carry out tank body excavation.
Tank diameter is 31m, Mining in Rock Mass hidden hole drilling within the scope of mid diameter 24m, the way that progressively therefrom the radiation of mind-set surrounding is excavated.Utilize center vertical shaft for explosion free face, vertical perforating, progressively peels off, and quarrel body by sliding to bottom sump road under vertical shaft, transport with large-scale muck removal equipment.Mid portion utilizes hidden hole drilling excavation advantage for drilling depth can disposablely be drilled into, to need explosion rock mass bottom, and dosage is saved, avoided manually taking off quarrel, saving of work and time, but need keyhole eye distance, array pitch and single detonating charge amount, the control of eye distance and array pitch is to change big gun operation for avoiding explosion to go out the excessive secondary that produces of stone, the control of single detonating charge amount is that concussion of blasting and shock wave are excessive newly builds concrete to housing and cause damage in order to avoid, should strengthen big gun hole plug quality simultaneously, avoid producing slungshot housing is impacted.
Tank body edge adopts gas leg type air drill excavation, utilizes width 3.5m hoop rock zone as job platform, and periphery hole adopts smooth blasting, vertical perforating, successively excavation.Refer to Fig. 5,6: tank body excavation schematic diagram.
Claims (1)
1. a underground large-scale cave depot engineering goalpost assembly excavation method, is characterized in that step is as follows:
1), ground settlement and tunnel,
Adopt full*.face smooth blasting technology, excavation cyclic advance 2.0m, upper channel is excavated to after tank cap, and with wide 5m, the high section excavation to dome edge line is to the opposite side of tank cap; Lower channel is excavated to behind tank chamber, excavates out a spherical entrucking space in bottom, tank chamber;
2), tank cap excavation,
Ground settlement and tunnel is entered behind tank chamber, the downward excavating shaft in Cong Guanmao center, and by tank chamber up/down perforation, quarrel body directly pushes vertical shaft, coordinates and takes off quarrel, from lower channel, with tipping truck, is transported to spoil disposal area; Tank cap excavation divides upper and lower two to carry out, and first excavates tank cap top, limit excavation limit supporting; Tank cap top excavation progressively excavates to both sides along tangent line hoop from center-aisle, every ring width 2m, every ring excavation is shaped as cylinder, and tank deck periphery adopts smooth blasting, the short drilling depth that is controlled at 2 m, weak Blasting Control ball-crown body line style, the same tank body of tank cap bottom excavation method;
Tank cap bottom surface is excavated to 1m under ring beam bottom surface, while avoiding follow-up excavation tank body, the ring beam concrete of newly building is caused to damage, and strictly controls ring beam basement rock position excavation, avoids ring beam basement rock to damage;
3), tank body excavation,
After tank cap excavation, supporting complete, start to carry out the construction of tank cap housing, after housing concrete strength reaches standard value, start to carry out tank body excavation;
Interior Mining in Rock Mass hidden hole drilling in the middle of tank body, the progressively way of mind-set surrounding radiation excavation therefrom, utilizes center vertical shaft for explosion free face, vertical perforating, progressively peels off, and the body that is cut by sliding to bottom sump road under vertical shaft, transport with large-scale muck removal equipment,
Tank body edge adopts gas leg type air drill excavation, utilizes width 3.5m hoop rock zone as job platform, and periphery hole adopts smooth blasting, vertical perforating, successively excavation.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982204A (en) * | 2014-05-15 | 2014-08-13 | 攀钢集团工程技术有限公司 | Funneling construction method of high and large chamber |
| CN105156120A (en) * | 2015-09-11 | 2015-12-16 | 中铁九局集团第二工程有限公司 | Inclined-shaft reverse excavation construction method for hillside cave depot |
| CN105201532A (en) * | 2015-09-11 | 2015-12-30 | 中铁九局集团第二工程有限公司 | Ring excavation construction method for underground large-span spherical-cap-shaped dome under weak surrounding rock |
| CN107288654A (en) * | 2017-06-27 | 2017-10-24 | 长江勘测规划设计研究有限责任公司 | Super-span dome hollow ring in underground nuclear reactor cavern excavates structure and excavation method |
| CN112129183A (en) * | 2020-09-23 | 2020-12-25 | 中铁四局集团有限公司 | Hyperboloid cave depot dome accurate and rapid forming blasting excavation method |
| CN112145185A (en) * | 2020-09-23 | 2020-12-29 | 中铁四局集团有限公司 | Hyperboloid cave depot dome excavation method |
| CN112412502A (en) * | 2020-12-16 | 2021-02-26 | 中铁四局集团有限公司 | Excavation method for one-step blasting forming of cave depot tank body |
| CN113389579A (en) * | 2021-07-30 | 2021-09-14 | 中铁十一局集团第五工程有限公司 | Excavation method of underground large-space vertical tank body |
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| JPH04209299A (en) * | 1989-12-06 | 1992-07-30 | Kurt Svensson Graevmaskiner Ab | Method for execution of excavation in cavity of rock |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982204A (en) * | 2014-05-15 | 2014-08-13 | 攀钢集团工程技术有限公司 | Funneling construction method of high and large chamber |
| CN103982204B (en) * | 2014-05-15 | 2016-01-06 | 攀钢集团工程技术有限公司 | A kind of funneling construction method of high Large chamber |
| CN105156120A (en) * | 2015-09-11 | 2015-12-16 | 中铁九局集团第二工程有限公司 | Inclined-shaft reverse excavation construction method for hillside cave depot |
| CN105201532A (en) * | 2015-09-11 | 2015-12-30 | 中铁九局集团第二工程有限公司 | Ring excavation construction method for underground large-span spherical-cap-shaped dome under weak surrounding rock |
| CN105201532B (en) * | 2015-09-11 | 2017-09-22 | 中铁九局集团第二工程有限公司 | The Ring Cutting construction method of underground Long span spherical crown shape dome under weak surrounding rock |
| CN107288654A (en) * | 2017-06-27 | 2017-10-24 | 长江勘测规划设计研究有限责任公司 | Super-span dome hollow ring in underground nuclear reactor cavern excavates structure and excavation method |
| CN112129183A (en) * | 2020-09-23 | 2020-12-25 | 中铁四局集团有限公司 | Hyperboloid cave depot dome accurate and rapid forming blasting excavation method |
| CN112145185A (en) * | 2020-09-23 | 2020-12-29 | 中铁四局集团有限公司 | Hyperboloid cave depot dome excavation method |
| CN112412502A (en) * | 2020-12-16 | 2021-02-26 | 中铁四局集团有限公司 | Excavation method for one-step blasting forming of cave depot tank body |
| CN113389579A (en) * | 2021-07-30 | 2021-09-14 | 中铁十一局集团第五工程有限公司 | Excavation method of underground large-space vertical tank body |
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