CN107355233B - A kind of underground chamber and Cavity Construction method - Google Patents

A kind of underground chamber and Cavity Construction method Download PDF

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Publication number
CN107355233B
CN107355233B CN201710763002.XA CN201710763002A CN107355233B CN 107355233 B CN107355233 B CN 107355233B CN 201710763002 A CN201710763002 A CN 201710763002A CN 107355233 B CN107355233 B CN 107355233B
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CN
China
Prior art keywords
gallery
cavern
periphery
construction
main
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CN201710763002.XA
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Chinese (zh)
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CN107355233A (en
Inventor
胡林江
冯树荣
胡育林
文学军
杨军
刑磊
吴书艳
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中国电建集团中南勘测设计研究院有限公司
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Priority to CN201710763002.XA priority Critical patent/CN107355233B/en
Publication of CN107355233A publication Critical patent/CN107355233A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • E21D20/003Machines for drilling anchor holes and setting anchor bolts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage

Abstract

The present invention relates to rich groundwaters, the construction method of the large underground hole of wall rock geology condition difference, advance water discharge is carried out using underground gallery, the main surrounding rock of chamber of advance reinforcement, advance exploration, the multipurpose layout pattern and method monitored in advance, i.e. Main Underground cavern crown and with abutment wall periphery arranging multiplayer underground gallery, it first constructs before main cavern excavation the gallery of crown and abutment wall periphery, main cavern periphery groundwater level is reduced in advance using the underground gallery after construction, preconsolidation grouting is carried out to main cavern's crown country rock using top layer gallery and abutment wall periphery gallery simultaneously, prestress anchorage cable drilling construction and monitoring instrument it is pre-buried.This layout pattern and method, both influence of the underground water to surrounding rock of chamber had been can effectively reduce, it again can be by carrying out consolidation by grouting country rock to main cavern in advance, shorten anchor cable construction time performance anchor cable immediate support effect, and pass through advanced pre-buried monitoring instrument, the deformation measurement data for promptly and accurately acquiring and grasping country rock during main cavern excavation comes design and construction, the powerful guarantee safety and stability of Cavity Construction phase and runtime.

Description

A kind of underground chamber and Cavity Construction method

Technical field

The invention belongs to underground engineering field, it is related to a kind of underground chamber and Cavity Construction method more particularly to ground It is lauched the large underground hole and its construction method of abundant wall rock geology condition difference.

Background technique

Currently, the Cavity Construction poor for rich groundwater, wall rock condition, is mainly arranged on underground chamber periphery Underground gallery is permanently drained;In terms of supporting on the basis of using bolt-spary supports, it is also necessary to which arrangement prestress anchor cable is controlled The surrouding rock deformation of cavity preparation room.In conventional way, the arrangement of underground gallery is solely for permanently draining, and underground gallery construct it is past Toward main cavern con struction is lagged behind, the groundwater level for reducing main cavern periphery in advance is not considered, construction time main surrounding rock of chamber is often Easily there is phenomena such as landslide due to being influenced by underground water;Prestress anchorage cable mostly uses end anchor cable, anchor cable construction and monitor When device embedded will often wait main cavern excavation, then row construction, such cable bolting timeliness is poor, the number that monitoring instrument is collected into According to lag, it can not really reflect the case where surrouding rock deformation, cable bolting often occur not in time, cause to go out during main cavern excavation The case where showing excessive surrouding rock deformation and unstability occurs, and also usually can not be grasped in time cavern due to the embedded lag of monitoring instrument and be enclosed The deformation of rock leads to not the stable case for prejudging surrounding rock of chamber, and landslide phenomenon occurs, influences construction time safety, and Cause construction delay.

Summary of the invention

In view of the deficiencies of the prior art, the present invention provides a kind of structurally stable underground chamber and its construction method.

The technical solution of the present invention is as follows: a kind of underground chamber, including main cavern, the vault of the main cavern are equipped with grouting and add Gu Qu, the top in consolidation by grouting area are equipped with the row's of filling gallery, are equipped with prestress anchorage cable between filling row's gallery and consolidation by grouting area; The two sides of the main cavern be respectively equipped with it is a plurality of be from top to bottom arranged successively periphery gallery, a plurality of periphery gallery and main cavern Abutment wall between be equipped with prestress anchorage cable.

Generally, consolidation by grouting area, which is directed toward in the rock stratum of corresponding region, injects the materials such as Grouting Cement, is somebody's turn to do with playing to reinforce The effect in region.

In the present invention, pass through the setting in consolidation by grouting area, it is ensured that the intensity of main cavern crown area country rock prevents out Occurs cave in accident when digging;Meanwhile setting fills row's gallery above consolidation by grouting area, can facilitate grouting on the one hand to form grouting Stabilization zone, on the other hand, it is convenient to prestress anchorage cable be set between the row's of filling gallery and consolidation by grouting area, constrain corresponding country rock Deformation, improve the structural stability of main cavern, while prestress anchorage cable generates draw to consolidation by grouting area, reduce grouting Pressure of the stabilization zone to main cavern's abutment wall position;It, can be to main cavern by the setting of periphery gallery and related prestress anchorage cable Country rock near abutment wall generates support action, and limiting surrouding rock deformation with the soundness of the main cavern of comprehensive promotion prevents main hole There is cave in accident in room excavation and subsequent use process.

Further, two filling are equipped with above main cavern's vault and arrange gallerys, two fillings are set and arrange gallerys, it is corresponding can Mostly two prestress anchorage cables of setting, to increase the restraining force to vault country rock.

Further, the row's of filling gallery, which is equipped with to filling, arranges the drainage hole curtain extended above gallery.

Further, it is connected between the adjacent periphery gallery by drainage hole curtain.

By the setting of drainage hole curtain, main cavern periphery level of ground water can be reduced, reduces underground water to main cavern excavation It influences, stablizes conducive to the excavation of main cavern;It after the completion of excavation, can play a protective role to main cavern, reduce water to main cavern Infiltration.

Further, the main cavern includes multiple sub- caverns, and periphery gallery, this week are equipped between the adjacent sub- cavern It is respectively equipped with prestress anchorage cable between side corner road and the abutment wall of adjacent each sub- cavern, improves the stable degree of cavern's abutment wall.

Further, the prestress anchorage cable is prestressing force two-ended cables.

Further, the filling row gallery is 10 ~ 35m at a distance from main cavern's vault;The periphery gallery and main cavern The distance between abutment wall is 30 ~ 60m.Preferably, the filling row gallery is 20 ~ 30m at a distance from main cavern's vault;The periphery The distance between gallery and main cavern's abutment wall are 40 ~ 50m.

In order to obtain the information such as main surrounding rock of chamber deformation, monitoring is embedded between the periphery gallery and the abutment wall of main cavern Instrument;Monitor is embedded between filling row's gallery and main cavern's vault.Preferably, the monitor is multipoint displacement meter.

Based on the same inventive concept, the present invention also provides a kind of construction methods of underground chamber, include the following steps:

S1, before excavating main cavern, filling row's gallery is being dug above main cavern's vault wait excavate;Meanwhile wait excavate The abutment wall two sides of main cavern dig the 1st layer of periphery gallery respectively, which is located at the depth model that main cavern's vault is crossed over In enclosing, top layer gallery is dug above the periphery gallery;

S2, each top layer gallery and filling arrange what the rock stratum being arranged above corresponding gallery on gallery extended in step sl respectively Drainage hole curtain is arranged in drainage hole curtain between top layer gallery and the 1st layer of periphery gallery;

S3, the country rock progress preconsolidation grouting construction for excavating main cavern's vault excavation line or more is treated by the row's of filling gallery, Consolidation by grouting area is obtained above main cavern's vault;

S4, the pore-creating and the prestressed anchor that excavate main cavern and carry out prestress anchorage cable are treated by periphery gallery and the row's of filling gallery The construction of pier;Then, start to excavate main cavern, after excavating prestress anchorage cable corresponding site, be reeved and to prestressing force Anchor cable carries out tensioning fixation;While excavating main cavern, digs below the 1st layer of periphery gallery and successively from top to bottom to arrange 2nd layer ... n-th layer periphery gallery, and drainage hole curtain is set between upper and lower adjacent periphery gallery;Wherein, N be not less than 2 positive integer.

Further, it when carrying out excavation construction to periphery gallery and the row's of filling gallery, is mentioned by periphery gallery and the row's of filling gallery It is preceding pre-buried for collecting the monitor of main surrounding rock of chamber geological information, such as multipoint displacement meter.In this way after main cavern excavation can and When collect the information such as surrouding rock deformation, can be to evaluate and adjustment support parameters and working measure provide foundation, effectively control is led The surrouding rock deformation of cavern, it is ensured that the safety and stability of main cavern excavation.

Using method of the invention, advanced excavation fills row's gallery, top layer gallery and the 1st layer of periphery gallery in step S1, and Setting related drain hole curtain in step s 2, can reduce main cavern periphery level of ground water in advance, reduce underground water to main cavern The influence of excavation, the excavation for being conducive to main cavern are stablized;In step S3, by grouting construction, main cavern's crown can be effectively improved The integrity and stability of country rock avoids crown country rock when main cavern excavation from big landslide and chip off-falling occur;In step S4, opening Just the pore-creating and the construction of prestressing force anchor pier that prestress anchorage cable is carried out before the cavern Wa Zhu, to main cavern excavation to anchor cable corresponding site After certain distance, the effect of can quickly reeving and carry out the tensioning fixation of anchor cable, anchor cable immediate support can be given full play to, in time about The deformation of beam country rock, to ensuring that it is highly beneficial that the excavation of main cavern is stablized.

After constructing in advance to underground galleries such as periphery gallery, top layer gallerys, collects underground gallery and excavate the geology disclosed Situation is deduced the country rock information of main cavern by this, is conducive to check supporting parameter and arrangement and method for construction.

The present invention is constructed in advance in underground chamber building process, using underground gallery, and combines advance water discharge, advanced right Main cavern's consolidation by grouting, advance exploration and the multipurpose layout pattern and construction method monitored in advance are realized advanced to main cavern Draining, advance grouting reinforcing, advance exploration and advanced monitoring.This layout pattern and method utilize main cavern's crown and periphery cloth It sets multi-layer underground gallery (top layer gallery, the row's of filling gallery and periphery gallery) and construction is completed in advance before main cavern excavation, first benefit The main cavern region of excavation is treated with the underground gallery after construction and neighbouring rock stratum carries out advance water discharge, i.e., is reduced by gallery wait open The groundwater level on the cavern Wa Zhu periphery effectively reduces influence of the underground water to main cavern excavation, guarantees the excavation of main cavern Stablize;It recycles the row's of filling gallery to carry out preconsolidation grouting advance reinforcement to main cavern, improves the integrality of main cavern's crown country rock And stability, avoid crown country rock when main cavern excavation from big landslide and chip off-falling occur;Then the underground corridor after construction is recycled Road in advance drills the construction of (anchor pier) to prestress anchorage cable, can give full play to the timeliness of cable bolting, constraint is enclosed in time The deformation of rock, it is ensured that the excavation of main cavern is stablized;It collects geological information and mentions in related underground gallery after finally recycling construction Preceding pre-buried monitoring instrument, thus it is speculated that the cavern Chu Zhu geological information and in time acquisition monitoring data can be evaluation and adjustment design of its support ginseng Several and working measure provides foundation, to efficiently control the surrouding rock deformation of main cavern and ensuring that the safety and stability of main cavern excavation mentions For favorably ensureing.

Underground chamber stabilized structure of the invention, runtime safety and stability;The construction method of offer through the invention, can It realizes and the safety and stability of main cavern is excavated, save the construction time, the safety of effective guarantee Cavity Construction phase and runtime Stablize.

Detailed description of the invention

Fig. 1 is the gallery and drainage hole curtain arrangement schematic diagram of the first embodiment of the invention.

Fig. 2 is main cavern's crown preconsolidation grouting arrangement schematic diagram of the first embodiment of the invention.

Fig. 3 is the prestress anchorage cable arrangement schematic diagram of the first embodiment of the invention.

Fig. 4 is that the underground gallery monitor of the first embodiment of the invention buries situation schematic diagram.

Wherein: 1-top layer gallery;2-the row's of filling gallerys;3-periphery gallerys;4-drainage hole curtains;5-consolidation by grouting areas; 6-prestress anchorage cables;7-monitoring instruments;8-main caverns;801, the sub- cavern 802-.

Specific embodiment

For sake of convenience, such as there are "upper", "lower", "left", "right" printed words in the present invention, only indicate and attached drawing itself Upper and lower, left and right direction is consistent, does not play restriction effect to structure.

Next by taking the building of the underground chamber of certain hydroenergy storage station as an example below invention is further explained, the power station Underground Powerhouse condition is poor, and surrounding rock category is III~IV class, and V class of part, country rock is relatively more broken, and underground water ten Divide abundant.

The vault of the underground chamber, including main cavern 8, the main cavern 8 is equipped with consolidation by grouting area 5, consolidation by grouting area 5 Top is equipped with the row's of filling gallery 2, is equipped with prestress anchorage cable 6 between filling row's gallery 2 and consolidation by grouting area 5;The main cavern 8 Two sides are respectively equipped with 3 and are from top to bottom arranged successively periphery gallery 3, the side of first layer and second layer periphery gallery 3 and main cavern 8 Prestress anchorage cable 6 is equipped between wall.

Wherein, the main cavern 8 includes cavern's 801 and sub- cavern 802, and two filling rows are equipped with above each sub- cavern's vault Gallery 2(is shown in Fig. 2).

The row's of filling gallery 2, which is equipped with to filling, arranges the drainage hole curtain 4 extended above gallery;The adjacent periphery gallery 3 it Between by drainage hole curtain 4 be connected to (see figure 1).

Be equipped with a periphery gallery 3 between the adjacent sub- cavern, the abutment wall of the periphery gallery 3 and adjacent each sub- cavern it Between be respectively equipped with prestress anchorage cable 6(and see Fig. 3).

The prestress anchorage cable 6 is prestressing force two-ended cables.

Monitor 7 is embedded between the periphery gallery 3 and the abutment wall of main cavern 8;Filling row's gallery 2 and main cavern 8 It is embedded with monitor 7(between vault and sees Fig. 4).

For the overall stability for improving workshop surrounding rock of chamber, 4 are arranged in the above 25m of workshop crown and away from the periphery abutment wall 45m Layer underground gallery (is from top to bottom followed successively by top layer gallery 1 and filling the row gallery 2, periphery gallery 3 concordant with top layer gallery), underground Gallery arrangement, which fully considers, reduces workshop underground water, preconsolidation grouting can be carried out to main building and main transformer hole crown country rock not only but also The rapid construction and many-sided comprehensive function such as pre-buried monitoring instrument in advance for facilitating prestress anchorage cable, in underground gallery layout design When fully consider that the suitable elevation of gallery and position and top layer fill row's gallery cross dimensions etc., underground gallery arrangement should have The standby condition constructed in advance, has carry out mentioning for preconsolidation grouting, prestress anchorage cable 6 and monitor 7 to main cavern's crown again The condition and method of preceding construction.The underground gallery multipurpose layout pattern and method had both successfully solved underground water and had opened workshop The influence of digging makes the entire digging process of workshop be substantially at dry environment construction, further through preconsolidation grouting, prestress anchorage cable Immediate support and monitoring instrument shift to an earlier date pre-buried accurate grasp workshop surrouding rock deformation data, adjust supporting parameter in time and construction is arranged It applies, efficiently controls the deformation of workshop surrounding rock of chamber, smoothly ensure that the safety and stability of workshop cavern excavation process.It is imitated from implementation From the point of view of fruit, effect is more satisfactory, and main cavern excavation process does not occur landslide, chip off-falling phenomenon, and engineering carries out very smooth;Runtime In, main cavern's structure performance is stablized, and does not occur abnormal phenomenon.

Claims (8)

1. a kind of construction method of underground chamber, which comprises the steps of:
S1, before excavating main cavern, filling row gallery (2) is being dug above main cavern's vault wait excavate;Meanwhile in master to be excavated The abutment wall two sides of cavern dig the 1st layer of periphery gallery (3) respectively, which is located at the depth that main cavern's vault is crossed over It spends in range, digs top layer gallery (1) above the periphery gallery (3);
S2, the rock stratum extension being arranged above corresponding gallery on gallery (2) is arranged in each top layer gallery (1) and filling in step sl respectively Drainage hole curtain (4), between top layer gallery (1) and the 1st layer of periphery gallery (3) be arranged drainage hole curtain (4);
S3, the country rock that main cavern (8) the vault excavation line of excavation or more is treated by the row of filling gallery (2) carry out preconsolidation grouting and apply Work obtains consolidation by grouting area (5) above main cavern's vault;
S4, the pore-creating and prestressing force anchor pier for excavating main cavern's progress prestress anchorage cable are treated by periphery gallery and the row's of filling gallery Construction;Then, start to excavate main cavern, after excavating prestress anchorage cable corresponding site, be reeved and to prestress anchorage cable (6) tensioning fixation is carried out;While excavating main cavern, digs below the 1st layer of periphery gallery and successively from top to bottom to arrange 2nd layer ... n-th layer periphery gallery, and drainage hole curtain is set between upper and lower adjacent periphery gallery;Wherein, N be not less than 2 positive integer.
2. the construction method of underground chamber according to claim 1, which is characterized in that periphery gallery and fill row gallery into When row excavation construction, shifted to an earlier date by periphery gallery and the row's of filling gallery pre-buried for collecting the monitoring of main surrounding rock of chamber geological information Instrument.
3. the construction method of underground chamber according to claim 1, which is characterized in that above main cavern (8) vault Gallery (2) are arranged equipped with two fillings.
4. the construction method of underground chamber according to claim 1, which is characterized in that the adjacent periphery gallery (3) it Between by drainage hole curtain (4) be connected to.
5. the construction method of underground chamber according to claim 1, which is characterized in that the main cavern (8) includes multiple Sub- cavern (801;802), periphery gallery (3) is set to the adjacent sub- cavern (801;802) between, the periphery gallery (3) with Adjacent each sub- cavern (801;802) prestress anchorage cable (6) are respectively equipped between abutment wall.
6. the construction method of described in any item underground chambers according to claim 1 ~ 5, which is characterized in that the prestress anchorage cable It (6) is prestressing force two-ended cables.
7. the construction method of described in any item underground chambers according to claim 1 ~ 5, which is characterized in that gallery is arranged in the filling It (2) is 10 ~ 35m at a distance from main cavern (8) vault;The distance between the periphery gallery (3) and main cavern (8) abutment wall are 30 ~60m。
8. the construction method of described in any item underground chambers according to claim 1 ~ 5, which is characterized in that the periphery gallery (3) it is embedded between the abutment wall of main cavern (8) monitor (7);It is buried between described filling row gallery (2) and main cavern (8) vault Equipped with monitor (7).
CN201710763002.XA 2017-08-30 2017-08-30 A kind of underground chamber and Cavity Construction method CN107355233B (en)

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CN107355233B true CN107355233B (en) 2019-03-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109184761B (en) * 2018-10-29 2020-03-17 河南大有能源股份有限公司耿村煤矿 Method for solving problem of reinforcing integrity of surrounding rock by deformation of two rock masses

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CN105201001A (en) * 2015-10-10 2015-12-30 中国电建集团贵阳勘测设计研究院有限公司 Composite seepage preventing structure for large karst cave in karst region and construction method thereof
CN106640117A (en) * 2017-03-08 2017-05-10 中国电建集团中南勘测设计研究院有限公司 Underground cavern top arc structure, underground cavern and construction method of underground cavern
CN106640118A (en) * 2017-03-08 2017-05-10 中国电建集团中南勘测设计研究院有限公司 Underground cavity arch crown structure, underground cavity and underground cavity construction method
CN107044287A (en) * 2017-03-06 2017-08-15 刘冲 Colliery shaft station and the reinforcement means of track main entry

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102654055A (en) * 2012-05-21 2012-09-05 乐贵平 Construction method for compound construction of large-scale underground space structure by holes, groove and piles
CN103306682A (en) * 2013-06-26 2013-09-18 中国水电顾问集团中南勘测设计研究院 Long-span and high-side-wall underground space building and excavation support method thereof
CN103321653A (en) * 2013-06-27 2013-09-25 中国水电顾问集团成都勘测设计研究院 Method of treating lining after collapse of underground cavern crown
CN104453950A (en) * 2014-12-29 2015-03-25 中国电建集团中南勘测设计研究院有限公司 Underground cavity hanging concrete structure
CN105201001A (en) * 2015-10-10 2015-12-30 中国电建集团贵阳勘测设计研究院有限公司 Composite seepage preventing structure for large karst cave in karst region and construction method thereof
CN107044287A (en) * 2017-03-06 2017-08-15 刘冲 Colliery shaft station and the reinforcement means of track main entry
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