CN206592127U - Great burying TBM construction tunnel rock burst processing structures - Google Patents
Great burying TBM construction tunnel rock burst processing structures Download PDFInfo
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- CN206592127U CN206592127U CN201720279862.1U CN201720279862U CN206592127U CN 206592127 U CN206592127 U CN 206592127U CN 201720279862 U CN201720279862 U CN 201720279862U CN 206592127 U CN206592127 U CN 206592127U
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- tunnel
- rock burst
- tbm
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- advance borehole
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Abstract
The utility model discloses a kind of great burying TBM construction tunnel rock burst processing structures of tunneling with TBM technical field, the structure includes being arranged on multiple advance boreholes of tunnel face crown area, the advance borehole runs through rock burst region, and the fracture zone formed between each advance borehole by presplit blasting in drilling is connected.The utility model utilizes TBM on-line operations space reasonable Arrangement bore position and direction on tunnel face, using drillhole blasting so that rock burst region crown, spandrel position form Broken rock mass crack, discharge rock burst region high-ground stress, release rockburst risk, the structure construction procedure is safe and efficient, cost is low, high treating effect, drilling high-pressure grouting processing can subsequently be carried out, improve Broken rock mass crack integrality, the crown amount of caving in and backfill amount in follow-up TBM drivings are reduced, with significant economic and social benefit.
Description
Technical field
The utility model is related at tunneling with TBM technical field, more particularly to a kind of great burying TBM construction tunnel rock bursts
Manage structure.
Background technology
Tunnel excavation largely uses TBM, i.e. complete-section tunnel boring machine, and TBM has drivage efficiency height, construction quality
Good, country rock disturbs the advantages of small, construction safety is environmentally friendly, automated information degree is high, has been widely used in water conservancy and hydropower work
The fields such as journey, metro construction, highway, railway.But it is poor to the unfavorable geological condition adaptability such as rock burst, in great burying tunnel
Often due to the problems such as rock burst hazard causes TBM card machines, device damage, being limited by the fuselage and fuselage of its bulky in the construction of hole
With country rock spacing very narrow and small factor, once occur card machine accident and will consume pole and carry out card machine for a long time to get rid of poverty processing operation,
Influence the extremely difficult corresponding heavy parts of reparation after project progress, and device damage.
At present, in TBM construction tunnels, mainly there are two kinds for the processing method of rock burst：One kind is existed using drilling and blasting method
Excavate auxiliary tunnel and detour to front of tunnel heading, then stress relieving explosion is carried out by excavating pilot tunnel forward in TBM tunneling directions side
Operation, reaches the purpose of rock burst processing.Another is to excavate a crown using drilling and blasting method in front of tunnel heading more than TBM work to break
The upper pilot tunnel in face, and supporting operation is carried out to upper pilot tunnel so that when later stage TBM constructions are passed through herein, supporting is complete for upper pilot tunnel
Finish, TBM only needs to carry out lower section driving, reach the purpose of rock burst processing.Be limited by TBM lead to country rock space it is very narrow
It is small, excavate auxiliary tunnel or pilot tunnel using drilling and blasting method to carry out the processing of the rock burst in TBM constructions, be directly faced with pilot tunnel or auxiliary tunnel
It is difficult to be slagged tap by TBM narrow spaces, inefficiency, and also during drill bursting construction, TBM is in stopped status, phase
That answers will influence the TBM construction speeds of whole tunnel；The position is in rock blasting region simultaneously, due to that can not transport phase to pilot tunnel
The quick-fried chassis of brill answered, makes drilling and blasting method operating personnel's security risk larger, bores that quick-fried operation is difficult, implement the feasibility of pilot drive compared with
It is low.
Utility model content
For overcome in the prior art for rock burst processing mode difficulty of construction it is big, risk is big, the low deficiency of operating efficiency,
Technical problem to be solved in the utility model is：A kind of tunnel rock burst processing structure for being capable of fast and safe construction is provided.
The utility model solves the technical scheme that its technical problem used：Great burying TBM construction tunnel rock burst processing
Structure, including tunnel and the rock burst region that rock burst is likely to occur positioned at tunnel front of tunnel heading, the vault of the tunnel face
Region is provided with multiple advance boreholes, and the advance borehole runs through rock burst region, passes through presplitting in drilling between each advance borehole
The fracture zone that explosion is formed is connected.
Being further that the multiple advance borehole is curved is disposed on face crown region, the advance drilling
Centerline hole is apart from tunnel center apart from r not less than the 1/2 of tunnel radius.
It is further that the arc area where the advance borehole is each a ° of vertical center line of tunnel or so, a °≤
90°。
It is further that the quantity n of the advance borehole and the spacing L of adjacent two advance borehole meet following relation：L=
2rsin(a/n-1)。
It is further to be equipped with the crushed zone crack between the advance borehole and each advance borehole and use high pressure
The cement mortar that grouting is formed.
The beneficial effects of the utility model are：The utility model is closed using TBM on-line operations space on tunnel face
Removing the work puts bore position and direction, using drillhole blasting so that rock burst region crown, spandrel position form Broken rock mass crack,
Rock burst region high-ground stress is discharged, rockburst risk is released, the structure construction is safe and efficient, cost is low, high treating effect, can enter one
Step carries out drilling high-pressure grouting processing, improves Broken rock mass crack integrality, reduce in follow-up TBM drivings the crown amount of caving in and
Backfill amount, not only ensure that rock burst treatment effect, and reduce later stage supporting and backfilling working, with significant economy and society
Can benefit.
Brief description of the drawings
Fig. 1 is the utility model constructing structure top view.
Fig. 2 is the utility model constructing structure front view.
Fig. 3 is the utility model constructing structure tunnel face structural representation.
Mark is 1- tunnels, 2- tunnel faces, 3- rock bursts region, 4- advance boreholes, 5- fracture zones, 6- in figure
The advanced rig of TBM, 7-.
Embodiment
The utility model is further described below by way of accompanying drawing.
As shown in Figure 1, Figure 2, Figure 3 shows, great burying TBM construct tunnel rock burst processing structure, including tunnel 1 and positioned at tunnel the palm
The sub- front of face 2 is likely to occur the rock burst region 3 of rock burst, and the crown region of the tunnel face 2 is provided with multiple advance boreholes 4,
The advance borehole 4 runs through rock burst region 3, and the crack formed between each advance borehole 4 by presplit blasting in drilling is crushed
Band 5 is connected.The processing mode for rock burst region generally comprises two kinds in the prior art, and one kind is by side tunnel excavation
Rock burst region is bypassed, bursting work is carried out in rock burst region fore, another is to excavate a crown using drilling and blasting method to be more than TBM works
Make the upper pilot tunnel of section, and supporting operation is carried out to upper pilot tunnel, TBM only needs to carry out lower section driving, so as to reach at rock burst
The purpose of reason.Both structures or form of construction work are required for larger construction volume, and are limited by working space, and efficiency is low, also
In the presence of certain potential safety hazard.Using structure described in the utility model, the advanced rig 7 that need to be only carried using TBM 6 is in tunnel
Several deep holes are bored in the crown region of face 2, and explosive is then filled in deep hole carries out presplit blasting, make rock burst region crown,
Spandrel position forms rock cranny crushed zone 5, and this structure can effectively discharge rock burst region high-ground stress, so as to avoid digging in TBM
Rock burst hazard is met with when entering.
Because TBM 6 advanced rig 7 is located at TBM fuselage interiors, the bore position and scope of advanced rig 7 are by certain
Limitation, the crown of rock burst region 3, the high-ground stress at spandrel position are effectively released in order to directly utilize advanced rig 7, and reach
Purpose, the multiple advance borehole 4 is curved to be disposed on the crown region of tunnel face 2, as shown in figure 3, described advanced
Drill be not less than tunnel radius apart from r the 1/2 of 4 distance between center line tunnel centers, the arc area where the advance borehole 4
For each a °, a °≤90 ° of vertical center line of tunnel or so.
Further, the quantity n of the advance borehole 4 and the spacing L of adjacent two advance borehole 4 meet following relation：L=
2rsin (a/n-1), the quantity and spacing of advance borehole 4 need the size and the high-ground stress in rock burst region according to different tunnels
Situation carries out reasonable selection.
Because rock burst region crown, spandrel position form rockmass crushed zone, follow-up TBM6 is tunneled to crushed zone position
When, crown, spandrel position rock mass there may be necessarily caving in, meanwhile, rock mass produces top country rock cavity after collapsing, after increase
Phase supporting backfill amount.In order to avoid such situation occurs, can before TBM6 drivings advance borehole 4 and each advance borehole 4 it
Between crushed zone crack 5 in be respectively provided with using high-pressure grouting formed cement mortar so that it is complete to improve Broken rock mass crack
Property, reduce the crown amount of caving in and backfill amount in follow-up TBM6 drivings.
The utility model utilizes TBM on-line operations space reasonable Arrangement bore position and direction on tunnel face, adopts
With drillhole blasting so that rock burst region crown, spandrel position form Broken rock mass, release rock burst region high-ground stress releases rock
Quick-fried risk, the structure construction procedure is safe and efficient, cost is low, high treating effect, can further carry out drilling high-pressure grouting processing,
Broken rock mass crack integrality is improved, the crown amount of caving in and backfill amount in follow-up TBM drivings is reduced, not only ensure that at rock burst
Effect is managed, and reduces later stage supporting and backfilling working, with significant economic and social benefit.
Claims (5)
- The tunnel rock burst processing structure 1. great burying TBM constructs, including tunnel (1) and may go out in front of the tunnel face (2) The rock burst region (3) of existing rock burst, it is characterized in that：The crown region of the tunnel face (2) is provided with multiple advance boreholes (4), The advance borehole (4) runs through rock burst region (3), passes through splitting that presplit blasting in drilling is formed between each advance borehole (4) Gap crushed zone (5) is connected.
- The tunnel rock burst processing structure 2. great burying TBM as claimed in claim 1 constructs, it is characterized in that：The multiple advance drilling Hole (4) is curved to be disposed on tunnel face (2) crown area, advance borehole (4) the distance between center line tunnel center Apart from r be not less than tunnel radius 1/2.
- The tunnel rock burst processing structure 3. great burying TBM as claimed in claim 2 constructs, it is characterized in that：The advance borehole (4) The arc area at place is each a °, a °≤90 ° of vertical center line of tunnel or so.
- The tunnel rock burst processing structure 4. great burying TBM as claimed in claim 3 constructs, it is characterized in that：The advance borehole (4) The spacing L of quantity n and adjacent two advance borehole (4) meet following relation：L=2rsin (a/n-1).
- 5. the great burying TBM construction tunnel rock burst processing structures as described in claim 1,2,3 or 4 any one claims, It is characterized in that：It is equipped with crushed zone crack (5) between the advance borehole (4) and each advance borehole and uses high-pressure grouting The cement mortar of formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720279862.1U CN206592127U (en) | 2017-03-21 | 2017-03-21 | Great burying TBM construction tunnel rock burst processing structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720279862.1U CN206592127U (en) | 2017-03-21 | 2017-03-21 | Great burying TBM construction tunnel rock burst processing structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206592127U true CN206592127U (en) | 2017-10-27 |
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ID=60125041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720279862.1U Active CN206592127U (en) | 2017-03-21 | 2017-03-21 | Great burying TBM construction tunnel rock burst processing structures |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930766A (en) * | 2017-03-21 | 2017-07-07 | 中国电建集团成都勘测设计研究院有限公司 | Great burying TBM construction tunnel rock burst processing structures |
| CN108166988A (en) * | 2017-12-19 | 2018-06-15 | 常州工学院 | A kind of rock tunnel support design method |
| CN112343605A (en) * | 2020-11-05 | 2021-02-09 | 西南科技大学 | Rock burst prevention tunnel excavation supporting method based on reduced-scale modified pressure arch |
-
2017
- 2017-03-21 CN CN201720279862.1U patent/CN206592127U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930766A (en) * | 2017-03-21 | 2017-07-07 | 中国电建集团成都勘测设计研究院有限公司 | Great burying TBM construction tunnel rock burst processing structures |
| CN108166988A (en) * | 2017-12-19 | 2018-06-15 | 常州工学院 | A kind of rock tunnel support design method |
| CN112343605A (en) * | 2020-11-05 | 2021-02-09 | 西南科技大学 | Rock burst prevention tunnel excavation supporting method based on reduced-scale modified pressure arch |
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