CN101037944A - Shallow buried and underground excavated engineering project execution method and equipment thereof - Google Patents

Shallow buried and underground excavated engineering project execution method and equipment thereof Download PDF

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Publication number
CN101037944A
CN101037944A CN 200710027739 CN200710027739A CN101037944A CN 101037944 A CN101037944 A CN 101037944A CN 200710027739 CN200710027739 CN 200710027739 CN 200710027739 A CN200710027739 A CN 200710027739A CN 101037944 A CN101037944 A CN 101037944A
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China
Prior art keywords
bow member
steel bow
equipment
junction plate
engineering project
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CN 200710027739
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Chinese (zh)
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CN100580223C (en
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惠中华
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惠中华
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Publication of CN100580223C publication Critical patent/CN100580223C/en

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Abstract

Superficial-embedding blind-digging engineering construction method and equipment thereof, particularly relates to construction method and equipment for subway and mountain ridge tunnel. Preliminary bracing, comprising steps of hanging mesh net on dug tunnel section and pre-spraying concrete, mounting prestress-adjustable steel arch on the tunnel section, plugging a rigid cushion block between the steel arc and the pre-spraying concrete and closely contacting them, applying pre-stress to the steel arc, and spraying concrete to fix the steel arc. The prestress-adjustable steel arc comprises a arc joint and a pre-adjusting joint provided within them, the pre-adjusting joint comprises upper-lower connection boards and an adjusting member provided between them. Advantage of the invention is that the prestress-adjustable steel arc is employed in the preliminary bracing, applying pre-stress to the steel arc , and the steel arc is forced to generate prestress to resist country rock convergent distortion, thereby reducing bad effects for tunnel surroundings.

Description

Shallow buried and underground excavated engineering project execution method and equipment thereof

Technical field

The present invention relates to shallow buried and underground excavated engineering project execution method and equipment thereof, particularly the job practices of subway, mountain tunnel and equipment thereof.

Background technology

Along with the fast development of communications and transportation and urban construction, various shallow buried and underground excavated engineering projects are also more and more, for example underground passage of city underground, mountain tunnel, large-scale pipe network or the like.Existing job practices is: auxiliary worker's method construction, excavation, preliminary bracing, two apotypes are annotated.The steel bow member is the used main support apparatus of preliminary bracing.The construction sequence of preliminary bracing comprises: linked network, pilot injection concrete, installation steel bow member, injection concrete also make it and steel bow member formation load integral body.Its weak point is: because the tau-effect of tunneling construction, the steel bow member is not closely connected with country rock behind in addition, make steel bow member country rock on every side produce bigger convergence deformation, uncontrollable sedimentation and deformation appears in the face of land easily, country rock makes the steel bow member passive stressed after producing convergence deformation, excessive deformation brings adverse effect to surrounding enviroment such as near the building the tunnel, road, massifs.

Summary of the invention

Technical problem to be solved by this invention provides a kind of shallow buried and underground excavated engineering project execution method and equipment thereof in order to overcome above-mentioned weak point exactly, during supporting in the early stage, but adopt preset stress steel bow member, apply prestressing force for earlier the steel bow member, become the steel bow member by the passive stressed active force that is, the steel bow member can effectively be resisted the country rock convergent deformation after producing prestressing force, can eliminate or reduce the adverse effect that surrounding enviroment such as near building, road, massif are brought effectively.

The present invention adopts following technical scheme.

Shallow buried and underground excavated engineering project execution method and equipment thereof, its job practices and step comprise auxiliary worker's method construction, excavation, preliminary bracing, two apotypes notes.Preliminary bracing may further comprise the steps:

(1) pilot injection concrete, promptly in the tunnel section linked network of having excavated, and pilot injection 5-10 cm thick concrete,

(2) adjustable prestress steel bow member is installed, promptly by the spacing of 0.5-1 rice adjustable prestress steel bow member is installed at the tunnel section that has excavated,

(3) choker block stiffness bearer, i.e. choker block stiffness bearer and make their tight contacts between adjustable prestress steel bow member and tunnel section pilot injection concrete,

(4) apply prestressing force, apply prestressing force promptly for adjustable prestress steel bow member, adding prestressed method is: place applicator between the preregulated upper and lower junction plate of adjustable prestress steel bow member, the operation applicator forces in upper and lower junction plate and passes to the arch joint of adjustable prestress steel bow member by them, pass to cushion block, pilot injection concrete, country rock successively by the arch joint again

(5) fixedly preconditioning, after applying prestressing force that preregulated regulating part is fixedly connected, withdraw applicator then or applicator is fixedly connected on the preregulated upper and lower junction plate,

(6) spray 20-40 cm thick concrete, make concrete and adjustable prestress steel bow member constitute load integral body.

Described applicator is a jack.

Described prestressing force is 3000-1000000 newton.

Shallow buried and underground excavated engineering project execution method and equipment thereof, comprise the steel bow member, the steel bow member contains the arch joint, described steel bow member is adjustable prestress steel bow member, it comprises arch joint and preconditioning, be mounted with preconditioning at the arch internode, preconditioning includes upper junction plate, lower connecting plate and regulating part, and regulating part is between upper junction plate and lower connecting plate.

Described regulating part comprises screw rod, steel pipe and nut, and screw rod is fixedlyed connected with upper junction plate and can be inserted in the hole of steel pipe, and steel pipe is fixedlyed connected with lower connecting plate, and nut revolves and is assigned on the screw rod, and its lower surface contacts with the steel pipe hole end surface.

Described regulating part is a jack, and the base of jack is connected with lower connecting plate, and fore-set is connected with upper junction plate.

Described regulating part comprises reinforcing bar and following reinforcing bar, and last reinforcing bar is fixedlyed connected with upper junction plate, and following reinforcing bar is fixedlyed connected with lower connecting plate.

The invention has the advantages that: during supporting in the early stage, adopt adjustable prestress steel bow member as support apparatus, and apply prestressing force for earlier the steel bow member, become the steel bow member by the passive stressed active force that is, the passive stressed meeting of steel bow member produces deformation, bring adverse effect for surrounding enviroment such as near the tunnel building, road, massif, steel bow member active force produces the deformation that can produce bigger support force opposing country rock to country rock behind the prestressing force, thereby eliminates or reduce above-mentioned adverse effect.

Description of drawings

Fig. 1 is adjustable prestress steel bow member structural representation of the present invention and contacts schematic diagram with country rock;

Fig. 2 is for can regulate embodiment one structural representation;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is for can regulate embodiment two structural representations;

Fig. 5 is for can regulate embodiment three structural representations;

Fig. 6 is the D-D sectional view of Fig. 5.

The specific embodiment

The present invention is further illustrated with accompanying drawing in conjunction with the embodiments.

A kind of shallow buried and underground excavated engineering project execution method and equipment thereof, its job practices and step comprise auxiliary worker's method construction, excavation, preliminary bracing, two apotypes notes, and preliminary bracing may further comprise the steps:

(1) pilot injection concrete, promptly in the tunnel section linked network of having excavated, and concrete after pilot injection 5-10 centimetre, the embodiment that the present invention is three is respectively 5 centimetres, 8 centimetres, 10 centimetres.

(2) adjustable prestress steel bow member is installed, promptly by the spacing of 0.5-1 rice adjustable prestress steel bow member is installed at the tunnel section that has excavated, three embodiment of the present invention are respectively 0.5 meter, 0.8 meter, 1 meter.

(3) choker block stiffness bearer, i.e. choker block stiffness bearer and make their tight contacts between adjustable prestress steel bow member and tunnel section pilot injection concrete,

(4) apply prestressing force, apply prestressing force promptly for adjustable prestress steel bow member, adding prestressed method is: place applicator between the preregulated upper and lower junction plate of adjustable prestress steel bow member, the operation applicator forces in upper and lower junction plate and passes to the arch joint of adjustable prestress steel bow member by them, pass to cushion block, pilot injection concrete, country rock successively by the arch joint again

(5) fixedly preconditioning, after applying prestressing force that preregulated regulating part is fixedly connected, withdraw applicator then or applicator is fixedly connected on the upper and lower junction plate,

(6) spray 20-40 cm thick concrete, make concrete and adjustable prestress steel bow member constitute load integral body.Three embodiment of the present invention are respectively 25 centimetres, 35 centimetres, 40 centimetres.

Described applicator is a jack.

Described prestressing force is 3000-1000000 newton.Four embodiment of the present invention are respectively 5000 newton, 10000 newton, 50000 newton, 800000 newton.

Referring to Fig. 1, adjustable prestress steel bow member comprises the arch joint, is mounted with at 2 at arch joint and can regulates 1.There is end plate at the two ends of arch joint, can regulate between the end plate that is placed in two arch joints.Adjustable prestress steel bow member shown in Figure 1 has been placed in the tunnel, is country rock around the steel bow member.Steel bow member among the figure shown in the solid line is the form that adds before the prestressing force, and adjustment can be regulated 1 length and add form behind the prestressing force for shown in the dotted line among the figure.

Can regulate including upper junction plate 11, lower connecting plate 12 and regulating part, regulating part is between upper junction plate and lower connecting plate.A plurality of embodiment can have been regulated.Can regulate regulate after, its upper junction plate 11 is connected with the end plate of arch joint, its lower connecting plate 12 encircles the end plate that saves with another and is connected.

Can regulate embodiment one: referring to Fig. 2, Fig. 3, described regulating part comprises screw rod 20, steel pipe 21 and nut 22, screw rod 20 is fixedlyed connected with upper junction plate 11 and can be inserted in the hole of steel pipe 21, steel pipe 21 is fixedlyed connected with lower connecting plate 12, nut 22 revolves and is assigned on the screw rod 20, and its lower surface contacts with the steel pipe hole end surface.The described prestressing force that applies, be and adjust adjustable length, control method is: withstand upper and lower junction plate with jack, turn nut 22, make the nut lower surface leave the steel pipe hole end surface, operate jack then, change adjustable length, after determining, turn nut again, the nut lower surface is contacted with the steel pipe hole end surface, withdraw jack then.

Can regulate embodiment two: referring to Fig. 4, described regulating part is a jack 29, and the base of jack is connected with lower roof plate 12, and fore-set is connected with upper junction plate 11.Control method: jack withstands upper and lower junction plate, operates jack, can change the distance of upper and lower junction plate, after determining, and the locking jack.

Can regulate embodiment three: referring to Fig. 5, Fig. 6, described regulating part comprises reinforcing bar 3 and following reinforcing bar 31, and last reinforcing bar 30 is fixedlyed connected with upper junction plate 11, and following reinforcing bar 31 is fixedlyed connected with lower connecting plate 12.Control method is: withstand upper and lower junction plate with jack, operate jack then and change the distance that goes up lower connecting plate, after regulating upper and lower reinforcing bar is welded to connect, remove the back jack.

In construction subsequently, spray concrete again, make concrete and adjustable prestress steel bow member formation load integral body and be fixed in the tunnel formation preliminary bracing.

Claims (7)

1, a kind of shallow buried and underground excavated engineering project execution method and equipment thereof, its job practices and step comprise auxiliary worker's method construction, excavation, preliminary bracing, two apotypes notes.It is characterized in that: preliminary bracing may further comprise the steps:
(1) pilot injection concrete, promptly in the tunnel section linked network of having excavated, and pilot injection 5-10 cm thick concrete,
(2) adjustable prestress steel bow member is installed, promptly by the spacing of 0.5-1 rice adjustable prestress steel bow member is installed at the tunnel section that has excavated,
(3) choker block stiffness bearer, i.e. choker block stiffness bearer and make their tight contacts between adjustable prestress steel bow member and tunnel section pilot injection concrete,
(4) apply prestressing force, apply prestressing force promptly for adjustable prestress steel bow member, adding prestressed method is: place applicator between the preregulated upper and lower junction plate of adjustable prestress steel bow member, the operation applicator forces in upper and lower junction plate and passes to the arch joint of adjustable prestress steel bow member by them, pass to cushion block, pilot injection concrete, country rock successively by the arch joint again
(5) fixedly preconditioning, after applying prestressing force that preregulated regulating part is fixedly connected, withdraw applicator then or applicator is fixedly connected on the preregulated upper and lower junction plate,
(6) spray 20-40 cm thick concrete, make concrete and adjustable prestress steel bow member constitute load integral body.
2, shallow buried and underground excavated engineering project steel bow member pre-stressed construction method according to claim 1 and equipment thereof, it is characterized in that: described applicator is a jack.
3, shallow buried and underground excavated engineering project steel bow member pre-stressed construction method according to claim 1 and equipment thereof, it is characterized in that: described prestressing force is 3000-1000000 newton.
4, a kind of shallow buried and underground excavated engineering project execution method and equipment thereof, comprise the steel bow member, the steel bow member contains the arch joint, it is characterized in that: described steel bow member is adjustable prestress steel bow member, it comprises arch joint (2) and preconditioning (1), be mounted with preconditioning (1) between arch joint (2), preconditioning includes upper junction plate (11), lower connecting plate (12) and regulating part, and regulating part is between upper junction plate and lower connecting plate.
5, shallow buried and underground excavated engineering project execution method according to claim 4 and equipment thereof, it is characterized in that: described regulating part comprises screw rod (20), steel pipe (21) and nut (22), screw rod (20) is fixedlyed connected with upper junction plate (11) and can be inserted in the hole of steel pipe (21), steel pipe (21) is fixedlyed connected with lower connecting plate (12), nut (22) revolves and is assigned on the screw rod (20), and its lower surface contacts with the steel pipe hole end surface.
6, shallow buried and underground excavated engineering project execution method according to claim 4 and equipment thereof is characterized in that: described regulating part is jack (29), and the base of jack is connected with lower connecting plate (12), and fore-set is connected with upper junction plate (12).
7, shallow buried and underground excavated engineering project execution method according to claim 4 and equipment thereof, it is characterized in that: described regulating part comprises reinforcing bar (30) and following reinforcing bar (31), last reinforcing bar (30) is fixedlyed connected with upper junction plate (11), and following reinforcing bar (31) is fixedlyed connected with lower connecting plate (12).
CN200710027739A 2007-04-27 2007-04-27 Shallow buried and underground excavated engineering project execution method CN100580223C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200710027739A CN100580223C (en) 2007-04-27 2007-04-27 Shallow buried and underground excavated engineering project execution method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200710027739A CN100580223C (en) 2007-04-27 2007-04-27 Shallow buried and underground excavated engineering project execution method

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CN101037944A true CN101037944A (en) 2007-09-19
CN100580223C CN100580223C (en) 2010-01-13

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101818647A (en) * 2010-04-02 2010-09-01 中铁二局股份有限公司 Advance support fast construction method in shallow tunnelling loose pebble bed
CN101963060A (en) * 2010-10-15 2011-02-02 西南交通大学 Tunnel construction method based on steel tube arch-rib supporting structure
CN102011597A (en) * 2010-11-29 2011-04-13 成都中铁隆工程有限公司 Method and structure for supporting weak surrounding rocks of tunnel
CN101487393B (en) * 2009-02-20 2011-09-21 中铁西南科学研究院有限公司 Full-section pre-reinforcing construction method for tunnel free-machining anchor bar
CN102518454A (en) * 2011-12-22 2012-06-27 中铁工程设计咨询集团有限公司 Grating device for underground excavation engineering and manufacture method
CN102953739A (en) * 2012-10-26 2013-03-06 中铁二十二局集团第六工程有限公司 Bidirectional punching method for underground excavation of subway station
CN104047619A (en) * 2014-06-06 2014-09-17 中国水电顾问集团华东勘测设计研究院有限公司 Steel grating lagging jack with adjustable size and construction method thereof
CN104481558A (en) * 2014-11-15 2015-04-01 中铁三局集团有限公司 Feet-arch-free principle based reinforcing type lining construction method for steel frame in tunnel transition section
CN105019922A (en) * 2015-07-30 2015-11-04 中铁十二局集团国际工程有限公司 Retracted steel-arch connecting piece
CN108104842A (en) * 2017-12-26 2018-06-01 同济大学 A kind of soft soil tunnel lining construction method and device based on 3D printing technique
CN108708747A (en) * 2018-05-23 2018-10-26 黄建国 A kind of active stress eliminating device for loose sand sand cobble geology constructing tunnel

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101487393B (en) * 2009-02-20 2011-09-21 中铁西南科学研究院有限公司 Full-section pre-reinforcing construction method for tunnel free-machining anchor bar
CN101818647A (en) * 2010-04-02 2010-09-01 中铁二局股份有限公司 Advance support fast construction method in shallow tunnelling loose pebble bed
CN101963060B (en) * 2010-10-15 2012-07-11 西南交通大学 Tunnel construction method based on steel tube arch-rib supporting structure
CN101963060A (en) * 2010-10-15 2011-02-02 西南交通大学 Tunnel construction method based on steel tube arch-rib supporting structure
CN102011597B (en) * 2010-11-29 2012-05-23 成都中铁隆工程有限公司 Method and structure for supporting weak surrounding rocks of tunnel
CN102011597A (en) * 2010-11-29 2011-04-13 成都中铁隆工程有限公司 Method and structure for supporting weak surrounding rocks of tunnel
CN102518454A (en) * 2011-12-22 2012-06-27 中铁工程设计咨询集团有限公司 Grating device for underground excavation engineering and manufacture method
CN102953739B (en) * 2012-10-26 2015-05-06 中铁二十二局集团第六工程有限公司 Bidirectional punching method for underground excavation of subway station
CN102953739A (en) * 2012-10-26 2013-03-06 中铁二十二局集团第六工程有限公司 Bidirectional punching method for underground excavation of subway station
CN104047619B (en) * 2014-06-06 2016-10-05 中国水电顾问集团华东勘测设计研究院有限公司 The steel grating bow member of size adjustable and construction method thereof
CN104047619A (en) * 2014-06-06 2014-09-17 中国水电顾问集团华东勘测设计研究院有限公司 Steel grating lagging jack with adjustable size and construction method thereof
CN104481558A (en) * 2014-11-15 2015-04-01 中铁三局集团有限公司 Feet-arch-free principle based reinforcing type lining construction method for steel frame in tunnel transition section
CN105019922A (en) * 2015-07-30 2015-11-04 中铁十二局集团国际工程有限公司 Retracted steel-arch connecting piece
CN108104842A (en) * 2017-12-26 2018-06-01 同济大学 A kind of soft soil tunnel lining construction method and device based on 3D printing technique
CN108708747A (en) * 2018-05-23 2018-10-26 黄建国 A kind of active stress eliminating device for loose sand sand cobble geology constructing tunnel
CN108708747B (en) * 2018-05-23 2019-12-13 南京东南建筑机电抗震研究院有限公司 Active stress relieving device for loose sand-gravel geological tunnel construction

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Denomination of invention: Shallow buried and underground excavated engineering project execution method and equipment thereof

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