CN109766628A

CN109766628A - A kind of prominent hidden danger degree tri-layer that gushes in great burying tunnel recycles progressive quantization method

Info

Publication number: CN109766628A
Application number: CN201910015226.1A
Authority: CN
Inventors: 黄世武
Original assignee: GUANGXI XINDA HIGHWAY CO Ltd
Current assignee: GUANGXI XINDA HIGHWAY CO Ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2019-05-17
Anticipated expiration: 2039-01-08
Also published as: CN109766628B

Abstract

A kind of prominent hidden danger degree tri-layer that gushes in great burying tunnel recycles progressive quantization method；As the buried depth h in tunnel_{It buries}> 40r or h_{It buries}> 20B, the tunnel are referred to as great burying tunnel；The prominent first layer for the gushing hidden danger degree time quantization in great burying tunnel, is that first definitely the prominent of mass gushes source shape factor J_{It is deep}；The quantization of second level is by J_{It is deep}It is integrated with the construction disturbance factor of great burying tunnel cross-section, obtains that great burying tunnel equivalent cross-section is prominent to gush earthquake intensity G_{It is deep}；The quantization of third level is longitudinally to influence length L according to great burying constructing tunnel_{It is vertical}It dashes forward with equivalent cross-section and gushes earthquake intensity G_{It is deep}, the prominent degree of danger W for gushing disaster of estimation great burying tunnel tunnel face outburst_{It is deep}；Tri-layer quantization is by ground mass to section again to paragraph, and by part to whole, quantization, assessment administer and recycle progressive, and each section prominent is gradually gushed hidden danger elimination.

Description

A kind of prominent hidden danger degree tri-layer that gushes in great burying tunnel recycles progressive quantization method

Technical field

It dashes forward the present invention relates to tunneling and underground engineering and gushes hidden danger degree quantitative analysis method, and in particular to a kind of great burying tunnel The prominent hidden danger degree tri-layer that gushes in road recycles progressive quantization method.

Background technique

Great burying tunnel, which has broken out to dash forward, gushes disaster, and macroscopic appearance has respectively: water burst or the prominent mud mixing of prominent mud or water burst.Calamity Evil degree varies, and situation is different.

Great burying tunnel is prominent gush disaster macroscopic appearance with hidden danger degree be it is corresponding, it is macro to quantify hidden danger degree deducibility disaster A possibility that seeing situation, disaster macroscopic appearance, which has occurred, counter can then push away hidden danger degree.Accurate Prediction great burying tunnel is prominent to gush hidden danger, It is both the key of hidden perils, and excavates the key of decision after administering.

Traditionally, the certain character numerical values of hydrogeology are used only and quantify hidden danger, if table 2-6 is " highway tunnel construction technology Detailed rules and regulations " water yield of (JTG/T F60-2009) corresponds to water burst and gushes mud disaster grading, and the size of disaster degree is only and merely Water it is associated, do not show it is related to principal elements such as tunnel contour size, the variations of construction disturbance host rock environment, It was verified that exactly relation factor lacks, cause judgement often disgraceful, only in the prediction to simple water burst hidden danger, Though slightly certain correspondence, accuracy rate is not high, if for mud of dashing forward, the prediction of the prominent mud mixing of water burst, accuracy rate is lower.It passes Mainly one layer of the problem of system method, quantifies and many relation factors is brought to lack, poor so as to cause applicability.

Table 1: water burst gushes the classification of mud disaster degree Yu water burst water

Note: the water in upper table means the unit hour water yield in tunnel tunnel.

The prominent disaster of gushing in great burying tunnel is by hydrogeology, the variation of tunnel contour size, construction disturbance host rock environment etc. What principal element was constituted, so that quantitative analysis is reached reliable, it is necessary to by hydrogeology and environmental change combined factors.

So far, there is no by hydrogeology with environmental change combined factors to accamalating quantity great burying tunnel dash forward gush it is hidden Suffer from the method for degree, for this reason, it is necessary to propose a kind of to bury hydrogeology with environmental change combined factors greatly to accamalating quantity Factors are integrated, are connected layer by layer, to help to design by part to entirety by the prominent method for gushing hidden danger degree in deep tunnel With construction personnel it is more scientific, it is comprehensive, accurately determine that great burying tunnel is prominent to gush hidden danger degree, to ensure construction personnel and property Safety.

Summary of the invention

In view of the deficiencies of the prior art, the present invention provides that a kind of great burying tunnel is prominent to gush the progressive quantization of hidden danger degree tri-layer Method.The evaluation method can help design and construction personnel it is more scientific, it is comprehensive, accurately determine that great burying tunnel is prominent to gush hidden danger Degree, and better effect is obtained on the implementation.

To achieve the goals above, the technical solution adopted by the present invention is that:

A kind of prominent hidden danger degree tri-layer that gushes in great burying tunnel recycles progressive quantization method；As the buried depth h in tunnel_{It buries}> 40r, Or h_{It buries}> 20B, the tunnel are referred to as great burying tunnel；The prominent first layer for the gushing hidden danger degree time quantization in great burying tunnel is first definitely The prominent of mass gushes source shape factor J_{It is deep}；The quantization of second level is by J_{It is deep}Add with the construction disturbance factor of great burying tunnel cross-section With synthesis, obtain that great burying tunnel equivalent cross-section is prominent to gush earthquake intensity G_{It is deep}；The quantization of third level is vertical according to great burying constructing tunnel To influence length L_{It is vertical}It dashes forward with equivalent cross-section and gushes earthquake intensity G_{It is deep}, the prominent degree of danger for gushing disaster of estimation great burying tunnel tunnel face outburst W_{It is deep}；Tri-layer quantifies by ground mass to section again to paragraph, and by part to entirety, quantization, assessment, improvement circulation are progressive, gradually Each section of prominent hidden danger of gushing is eliminated；

Specific step is as follows for the method for the above-described progressive quantization of tri-layer:

The prominent first layer quantization for gushing hidden danger degree in step 1, great burying tunnel；Its method is:

(1) definition in great burying tunnel

If edpth of tunnel is with h_{It buries}It indicates；If tunnel excavation profile radius is indicated with r, if tunnel excavation width is indicated with B；

If 5r≤h_{It buries}≤ 40r or 2.5B≤h_{It buries}≤ 20B, the tunnel are referred to as general buried depth tunnel；

If h_{It buries}> 40r or h_{It buries}> 20B, the tunnel are referred to as great burying tunnel；

(2) concept of ground mass is defined

Great burying tunnel underground environment is often complicated and changeable and uneven, and each region environmental hydrogeology condition is constituted not Must be identical, but to a certain extent by range shorter, it can always find one piece of uniform region of hydrogeologic condition；With phase Under conditions of the region of hydrogeologic condition, which can be considered as the ground mass of homogeneous, for example, water pressure, Surrounding Rock Strength, As one the mass that composition target particle size or parameter almost the same region regards；Certain block mass vary, as low as only account for According to the certain positions in great burying tunnel, greatly to occupying great burying tunnel certain area；

(3) the great burying tunnel of mass is prominent gushes hidden danger degree

The great burying tunnel of ground mass is prominent to gush hidden danger degree, directly proportional to hydraulic pressure pressure, with great burying tunnel surrounding intensity It is inversely proportional, and related to country rock composition grain composition correction factor, J can be used_{It is deep}It indicates, referred to as the source great burying tunnel Tu Yong form system Number, the great burying tunnel source Tu Yong shape factor J_{It is deep}Calculation formula are as follows:

J_{It is deep}=ε_{It is deep}×(P_{Deep water}/R_{It encloses deeply})；In formula:

J_{It is deep}- it is the great burying tunnel source Tu Yong shape factor, belong to no guiding principle figureofmerit；

ε_{It is deep}- it is great burying tunnel surrounding grain composition correction factor, belong to no guiding principle figureofmerit；Native for non-Extra-fine sand, Rock, fixing tentatively value is 1.05；Extra-fine sand value is 1.15；

P_{Deep water}- it is great burying tunnel a part country rock Groundwater pressure, measurement unit: MPa；

R_{It encloses deeply}- it is great burying tunnel a part country rock axial compressive strength, measurement unit: MPa；

If A, great burying tunnel is chamber hole or solution cavity, J is calculated_{It is deep}When value, hydraulic pressure takes with great burying tunnel surrounding intensity It is worth as follows:

1. great burying tunnel is pure water filling cavity hole, hydraulic pressure takes the hydraulic pressure of chamber hole core space, great burying tunnel surrounding intensity Take chamber hole

Outside 2 meters of the Surrounding Rock Strength of wall；

2. great burying tunnel is that water-filling fills mud chamber hole, hydraulic pressure chamber hole takes the hydraulic pressure of core space, and great burying tunnel surrounding is strong Degree takes the intensity of the chamber hole core space soil body, if soil strength numeric ratio hydraulic pressure is low, great burying tunnel surrounding intensity takes chamber hole Outside 2 meters of the Surrounding Rock Strength of wall；

3. no water cavity hole is in great burying tunnel, hydraulic pressure uniformly takes 0.5MPa, and great burying tunnel surrounding intensity takes chamber hole wall Outside 2 meters of Surrounding Rock Strength；

B, hydrogeology data in great burying tunnel acquire method:

By the hydraulic pressure and great burying tunnel surrounding intensity number that obtain underground water with test to the practical prospecting in great burying tunnel According to:

1. using conventional survey means, probing, probing, lossless detection and the more than one combination acquisition of advanced prediction are buried greatly Deep tunnel surrounding intensity data is obtained or is converted by compression test, cone penetration test, bearingtest, wave velocity testing method To great burying tunnel surrounding intensity；

2. obtaining water pressure data by following one of method: drilling ejectment water simultaneously measures hydraulic pressure, pore water pressure measurement Apparatus measures hydraulic pressure, pours water or grouting pressure fracturing method measurement hydraulic pressure, measurement water-head are converted to hydraulic pressure；

3. inferring great burying tunnel surrounding grain composition correction factor ε by conventional lithologic analysis_{It is deep}。

(4) source great burying tunnel Tu Yong shape factor J_{It is deep}The quantization and classification of value

Table 2: great burying tunnel is prominent to gush morphotype and the great burying tunnel source Tu Yong shape factor section relation table

Step 2: the prominent second layer for the gushing hidden danger degree time quantization in great burying tunnel；Its method is:

(1) equivalent cross-section in great burying tunnel is determined

For round great burying tunnel, Fig. 1 is seen, when the great burying tunnel surrounding of big deep-lying tunnel face is excavated When, there is stress-strain adjustment in section, adjusts relationship according to section stress-strain, and round great burying tunnel is adjusted radius Range is that the round great burying tunnel cross-section of 5r is determined as the equivalent cross-section in round great burying tunnel, sees Fig. 2；

For non-circular great burying tunnel, then using the center of great burying tunnel cross-section as the center of circle, with outline excavation linear distance The maximum distance in the center of circle is radius r, draws to obtain a small circular, then centered on the center of circle of the roundlet, is 5r drafting with radius One great circle, then the great circle is determined as the equivalent cross-section in non-circular great burying tunnel, is detailed in Fig. 3, Fig. 4；

(2) subregion and assignment, the differentiation including following scenario described are carried out to great burying tunnel equivalent cross-section；

1. the mechanics subregion of great burying tunnel equivalent cross-section

Great burying tunnel equivalent cross-section is divided into three mechanics areas: METHOD FOR LARGE DEFORMATION ELASTOPLASTIC area A_{It is deep}, plasticity small deformation area B_{It is deep}, bullet modeling Property area C_{It is deep}, it is detailed in Fig. 5；

2. the geometric zoning of great burying tunnel equivalent cross-section

Great burying tunnel equivalent cross-section is divided into 25 subregions, the size of each subregion is the square of 2r × 2r, 25 A geometric zoning combines to have obtained the big square of a 10r × 10r, which is that 5r draws a great circle phase in radius It cuts and close to the great circle, so, big square is also referred to as great burying tunnel equivalent cross-section, is detailed in Fig. 6；

(3) mechanical deformation assignment is carried out to each equivalent cross-section subregion in great burying tunnel

According to great burying Tunnel Displacement deformation measurement data statistics, C is determined_{It is deep}The rate of deformation in area is less than 0.1mm/d；B_{It is deep}Area Rate of deformation be 0.1~1.0mm/d；A_{It is deep}The rate of deformation in area is greater than 1.0mm/d, and 5.0mm/d is greater than when serious.Further according to change The magnitude of shape rate carries out assignment to each equivalent cross-section subregion in great burying tunnel, establishes each subregion of great burying tunnel equivalent cross-section Assignment table；

A_{It is deep}The minimal deformation rate in area is C_{It is deep}The 10 of area's maximum distortion rate⁺¹Times, if C_{It is deep}The magnitude benchmark of area's rate of deformation It is determined as 10, i.e., 10⁺¹, then A_{It is deep}The magnitude of the rate of deformation in area is just 10⁺²；A_{It is deep}The rate of deformation in area has 2 grades, then it becomes Shape velocity magnitude median numbers are just (100+500)/2=300；B_{It is deep}Area occupy A_{It is deep}Area's minimal deformation rate and C_{It is deep}Area's maximum distortion speed Between rate, then B_{It is deep}The median numbers of the rate of deformation magnitude in area are just (10+100)/2=55；

(4) assignment for carrying out water influence to each equivalent cross-section subregion in great burying tunnel adjusts

The assignment that equivalent cross-section adjustment subregion water in great burying tunnel influences is divided into two kinds:

The first is by the assignment of the subregion of the importance adjustment tunnel column of top, lower part, with great burying tunnel On the basis of position, important coefficient is taken as 1.0, and every to rise a subregion coefficient raising 0.2, every one subregion coefficient of decline reduces 0.2；

Second is the assignment that the subregion of other column is adjusted by the size with great burying tunnel distance, with great burying tunnel position That set is classified as benchmark, far from a subregion, descent coefficient 0.2；

(5) great burying tunnel kernel subdivision area and assignment

Great burying tunnel kernel can subdivide area, can be with percentages assignment according to upper and lower importance assignment；

(6) the assignment achievement of each subregion in great burying tunnel, is detailed in Fig. 7；

(7) it establishes the prominent of each subregion in great burying tunnel and gushes intensity

The prominent intensity of gushing of each subregion in great burying tunnel is calculated according to following formula:

Q_{Deep i}=J_{Deep i}×Ν_{Deep i}×ξ_{It is deep}；In formula:

Q_{Deep i}The prominent of-subregion gushes intensity, indicates the prominent significance degree for gushing source form of subregion, dimensionless；

J_{Deep i}- it is the corresponding great burying tunnel source the Tu Yong shape factor of subregion, J_{Deep i}The value range of value is 0≤J_{Deep i}≤10^-1, work as J_{Deep i}> 10^-1When, J_{Deep i}Being worth same value is 1 × 10^-1；

Ν_{Deep i}- it is the corresponding subregion assignment in great burying tunnel；

ξ_{It is deep}- be each subregion of great burying tunnel equivalent cross-section edge effect coefficient, ξ_{It is deep}Value is corresponded to by following situation:

1. when the boundary of subregion is that water-filling fills mud chamber hole, ξ when subregion is located at arcade upper_{It is deep}1.3 are taken, subregion is located at and tunnel ξ when at same elevation_{It is deep}1.20 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.15；

2. when the boundary of subregion is water filling cavity hole, ξ when subregion is located at arcade upper_{It is deep}1.20 are taken, subregion is located at same with tunnel ξ when at one elevation_{It is deep}1.15 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.13；

3. when the boundary of subregion is dry chamber hole, ξ when subregion is located at arcade upper_{It is deep}1.15 are taken, subregion is located at same with tunnel ξ when at elevation_{It is deep}1.13 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.05；

4. when the boundary of subregion is non-chamber hole, ξ_{It is deep}Take 1.05；

(8) it establishes equivalent cross-section and dashes forward and gush strength formula

25 the prominent of subregion whole in tunnel equivalent cross-section are gushed into intensity addition, total dash forward for obtaining tunnel equivalent cross-section is gushed by force Degree,

Q_{It is deep total}=∑ Q_{Deep i}=∑ (J_{Deep i}×Ν_{Deep i}×ξ_{It is deep})；In formula:

Q_{It is deep total}- for the practical equivalent cross-section in tunnel it is total dash forward gush intensity, dimensionless；

Q_{Deep i}- it is that the prominent of subregion gushes intensity, dimensionless；

J_{Deep i}- it is the corresponding great burying tunnel source the Tu Yong shape factor of subregion；

ξ_{It is deep}- be each subregion of great burying tunnel equivalent cross-section edge effect coefficient；

(9) tunnel Reference Equivalent section is determined；

As the great burying tunnel source the Tu Yong shape factor J of 25 subregions in tunnel equivalent cross-section_{It is deep}Value is 10^-2When, then should Tunnel equivalent cross-section is tunnel Reference Equivalent section, and total prominent intensity of gushing of tunnel Reference Equivalent section is 7.86；

(10) it establishes the prominent of tunnel equivalent cross-section and gushes earthquake intensity

Establish the prominent calculation formula for gushing earthquake intensity of great burying tunnel equivalent cross-section are as follows:

G_{It is deep}=(Q_{It is deep total}-Q_{Deep benchmark})/Q_{Deep benchmark}=(Q_{It is deep total}-7.86)/7.86；In formula:

G_{It is deep}- it is that the prominent of great burying tunnel equivalent cross-section gushes earthquake intensity, it is to indicate relative to tunnel Reference Equivalent section, tunnel The prominent opposite degree of strength for gushing hidden danger of practical equivalent cross-section, belongs to no guiding principle amount；

Q_{Deep benchmark}- for tunnel Reference Equivalent section it is total dash forward gush intensity, value 7.86；

(11) three classes unit section is established

Non- dash forward gushes section, transition section, the prominent foundation for gushing hidden danger section three classes unit section, and wherein each unit section is prominent Gush earthquake intensity G_{It is deep}Value is respectively as follows:

Non- dash forward gushes section: -100%≤G_{It is deep}< 0；

Transition section: 0≤G_{It is deep}≤+64%；

General dash forward gushes hidden danger section :+64% < G_{It is deep}≤+900%；

Special dash forward gushes hidden danger section: G_{It is deep}>+900%；

Step 3: the prominent third level quantization for gushing hidden danger degree in great burying tunnel

The prominent third level quantization for gushing hidden danger degree in great burying tunnel, method is:

(1) the prominent concept for gushing cellular zone is proposed

Great burying tunnel paragraph is made of numerous equivalent cross-section, if wherein prominent the gushing of certain great burying tunnel equivalent cross-section Earthquake intensity G_{It is deep}It is determined as maximum value after sorted, to set the equivalent cross-section can represent certain paragraph, then great burying tunnel paragraph It is prominent to gush hidden danger degree and be equal to G_{It is deep}；

If the prominent of equivalent cross-section that represent of certain great burying tunnel section gushes earthquake intensity as G_{It is deep}, then great burying tunnel is prominent gushes cellular zone Differentiation have following situation:

As -100%≤G_{It is deep}It is the area Fei Tuyong when < 0；

As 0≤G_{It is deep}It is referred to as prominent to gush transition region when≤+ 64%；

As+64% < G_{It is deep}When≤+ 900%, referred to as general Tu Yong hidden danger area；

Work as G_{It is deep}When >+900%, referred to as special Tu Yong hidden danger area；

(2) it establishes the prominent disaster of gushing of great burying tunnel tunnel face and breaks out basic model

1. general great burying tunnel is prominent to gush disaster outburst basic model

When each great burying tunnel paragraph by the area Fei Tuyong, prominent gush that transition region, three, Tu Yong hidden danger area is prominent gushes unit district's groups At prominent disaster of gushing always is gushed transition region and just broken out in advance prominent, will not just break out, be detailed in after driving gos deep into Tu Yong hidden danger area Fig. 8；

2. special great burying tunnel is prominent to gush disaster outburst basic model

It is prominent to gush disaster when each great burying tunnel paragraph is gushed cellular zone and formed by the area Fei Tuyong, two, Tu Yong hidden danger area are prominent It always just breaks out, will not be just broken out after driving gos deep into Tu Yong hidden danger area in advance in the area Fei Tuyong close to Tu Yong hidden danger area, It is detailed in Fig. 9；

(3) determine that construction disturbance longitudinally influences length

1. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and general tunnel breaks out basic model When consistent, construct in prominent gush in transition region, construction disturbance influences length L to the longitudinal of front_{It is vertical}Are as follows:

When tunnel is general buried depth tunnel, i.e. 5r≤h_{It buries}≤ 40r or 2.5B≤h_{It buries}When≤20B, it is longitudinal influence length be by The index of correlation value in general buried depth tunnel, because uncorrelated to great burying tunnel, so the present invention is not specifically described；

When tunnel is great burying tunnel, and 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical}For 1.7B §_{It is deep}, B is tunnel excavation width, and r is tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep} Value is 1.0, § when serious_{It is deep}Value is 1.2；

When tunnel is great burying tunnel, and h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 2.0B §_{It is deep}, B is tunnel Excavation width, r are tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, § when serious_{It is deep}Value is 1.2；

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out base When this model is consistent, it first artificial must specify to dash forward and gush transition region, construct, constructed to front in artificially specified prominent gush in transition region It is longitudinal to influence length L_{It is vertical}Are as follows:

When tunnel is great burying tunnel, and 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical}For 1.1B §_{It is deep}, B is tunnel excavation width, and r is tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep} Value is 1.0, § when serious_{It is deep}Value is 1.2；

When tunnel is great burying tunnel, and h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 1.3B §_{It is deep}, B is tunnel Excavation width, r are tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, § when serious_{It is deep}Value is 1.2；

(4) longitudinal to influence length L_{It is vertical}Amendment

Length L is influenced on longitudinal_{It is vertical}It is modified, obtains modified longitudinal influence datum length；

1. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and general great burying tunnel breaks out base When this model is consistent, longitudinal datum length L is corrected_{It repairs deeply}Calculation formula are as follows:

L_{It repairs deeply}=L_{It is vertical}×(G_{Deep hidden 1})/(900%-64%)；In formula:

L_{It repairs deeply}- it is modified longitudinal influence datum length, measurement unit: rice；

L_{It is vertical}- longitudinal direction influences length, measurement unit: rice；As 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length when≤50B Spend L_{It is vertical}For 1.7B §_{It is deep}；Work as h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 2.0B §_{It is deep}；B is tunnel excavation width, and r is tunnel Road outline excavation radius；§_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, § when serious_{It is deep}Value is 1.2；

G_{Deep hidden 1}- it is to gush earthquake intensity, no guiding principle amount near prominent the prominent of that Tu Yong hidden danger area for gushing transition region；

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out base When this model is consistent,

Modified longitudinal influence datum length L_{It repairs}Calculation formula are as follows:

L_{It is vertical}- longitudinal direction influences length, measurement unit: rice；As 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length when≤50B Spend L_{It is vertical}For 1.1B §_{It is deep}；Work as h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 1.3B §_{It is deep}；B is tunnel excavation width, and r is tunnel Road outline excavation radius；§_{It is deep}For rock crusher degree regulation coefficient, when general level, §_{It is deep}Value is 1.0, when serious, §_{It is deep}Value It is 1.2；

G_{Deep hidden 1}- it is to gush earthquake intensity near prominent the prominent of that Tu Yong hidden danger area for gushing transition region；

(5) the prominent degree of danger calculation formula for gushing disaster of face outburst is established

The longitudinal datum length of the amendment of transition region is to correct longitudinal base when residue length is more than or equal to for preventing from backbreaking When standard length, it will not break out to dash forward and gush disaster, degree of danger is zero or is negative value；Longitudinal datum length is corrected when residue length is less than When, residue length is smaller, and the prominent degree of danger for gushing disaster of outburst is bigger；When residue length is equal to 0 meter, outburst is prominent to gush disaster Degree of danger is 100%, necessarily occurs to dash forward and gushes disaster, and therefore, the prominent degree of danger for gushing disaster of face outburst calculates are as follows:

1. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and general great burying tunnel breaks out base When this model is consistent, calculation formula are as follows:

W_{It is deep}=(L_{It repairs deeply}-L_{It is deep surplus})/L_{It repairs deeply}；In formula:

W_{It is deep}- it is the prominent degree of danger gushed of face outburst, measurement unit: %, W_{It is deep}Being worth value is 0~100%；

L_{It is deep surplus}- it is residue length, value range is 0≤L_{It is deep surplus}≤L_{It repairs deeply}, measurement unit: rice；

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out base When this model is consistent, calculation formula are as follows:

Step 4: hidden danger amount is administered progressive with re-quantization circulation

The improvement of hidden danger amount, which recycles progressive method with re-quantization, is:

(1) the safety state of current face is assessed

One group of great burying tunnel analytical unit section is divided into 4 specific regions: Fei Tuyong hidden danger area altogether, prominent come through is crossed Area, Tu Yong hidden danger area 1, Tu Yong hidden danger area 2；Current face position is D_{It is deep}-D_{It is deep}；If D_{It is deep}B_{It is deep}=L_{1 is repaired deeply}, face breaks out prominent The degree of danger for gushing disaster is 0, is in critical state, cannot excavate forward；If D_{It is deep}B_{It is deep}>L_{1 is repaired deeply}, face outburst is prominent to gush disaster Degree of danger less than 0, it is in a safe condition, can excavate forward again；If D_{It is deep}B_{It is deep}<L_{1 is repaired deeply}, face outburst is prominent to gush disaster Degree of danger is in the hole greater than 0, needs to close immediately, reinforces face；It is detailed in Figure 10；

(2) improvement of first circulation is carried out to the Tu Yong hidden danger area of current front of tunnel heading

Work as D_{It is deep}B_{It is deep}≧L_{1 is repaired deeply}When, under face is in a safe condition or critical state, Tu Yong hidden danger area 1 is prominent before improvement Gushing earthquake intensity is G_{Before deep hidden 1}, drafting management goal is G_{Deep hidden 1 plan}；According to G_{Deep hidden 1 plan}By step 2 can Fan Gutuyong hidden danger area 1 improvement Critical radius (the H of section_{It is deep}+ r), that is, plan the critical range administered, is detailed in Figure 11；

(3) assessment is carried out to the improvement area regulation effect of current front of tunnel heading and excavates decision

It is prominent to gush earthquake intensity and become G after Tu Yong hidden danger area 1 is administered_{After deep hidden 1}If G_{After deep hidden 1}>+64%, then judge governance quality not Qualification need to supplement improvement, be detailed in Figure 12；

If G_{After deep hidden 1}≤+64%, judge governance quality qualification；Administer it is qualified after, can excavate, section excavation is from D_{It is deep}-D_{It is deep}It arrives C_{It is deep}-C_{It is deep}, modified datum length and G_{Before 2 depths}It is related, it is to be ensured that C_{It is deep}E_{It is deep}≧L_{2 are repaired deeply}, it is the final face of the excavation of first circulation C can only be excavated_{It is deep}-C_{It is deep}The position of section, is detailed in Figure 13；

(4) start improvement, the assessment, excavation of second circulation

After excavating to the improvement area part of first circulation, current face position is advanced to C_{It is deep}-C_{It is deep}, start second circulation Improvement, the second the prominent of improvement area is gushed by earthquake intensity tests, if qualified, begins to the excavation of second circulation, so under circulation It goes, until Tu Yong hidden danger area is eliminated, is detailed in Figure 14.

Compared with prior art, the invention has the following beneficial effects:

1, compared with prior art, the present invention great burying tunnel cross-section and the distribution of section hydrogeology can have been fully considered Not necessarily uniformly, vertically and horizontally composite factors such as influence caused by outline excavation size, excavation, can relatively comprehensively, it is accurate Ground layered quantization mass, section, the prominent of paragraph gush hidden danger degree, and combined layer by layer, obtain on the implementation preferably at Effect provides foundation for subsequent improvement.Great burying tunnel hidden danger degree is traditionally only judged with water index, because water yield with Operation changes with environmental change, so judgement conclusion is unreliable, and can not judge current face only according to water burst figureofmerit The prominent degree of danger for gushing disaster of outburst, can not be used for governing project for water burst figureofmerit, be not used to whether judge governance quality It is qualified, it is also difficult to for excavating decision, it is more difficult to link of the circulation for quantifying, assessing, administer.

2, it is dashed forward using the method for the present invention analysis, improvement and gushes hidden danger or disaster, preferable social benefit, economic benefit will be obtained And ecological benefits.

Detailed description of the invention

Attached drawing 1: for great burying tunnel of the invention round half space sectional schematic diagram, in figure, circle indicates great burying tunnel The hacures of outline excavation, top indicate earth's surface；

Attached drawing 2: for great burying tunnel of the invention round equivalent cross-section schematic diagram, in figure, small circular indicates great burying tunnel Outline excavation, big round expression round great burying tunnel equivalent cross-section, 1 times of radius of 1 expression great burying tunnel excavation profile, 2 Indicate 2 times of radiuses of great burying tunnel excavation profile, 3 indicate 3 times of radiuses of great burying tunnel excavation profile, and 4 indicate great burying 4 times of radiuses of tunnel excavation profile, 5 indicate 5 times of radiuses of great burying tunnel excavation profile；

Attached drawing 3: for rectangular shape great burying of the present invention tunnel equivalent cross-section schematic diagram, in figure, rectangle indicates great burying tunnel The true form in road outline excavation face, roundlet indicate that rectangle great burying tunnel is reduced to circular tunnel, and great circle indicates great burying tunnel Road equivalent cross-section, 1r indicate that 1 times of great burying tunnel excavation radius, 2r indicate that 2 times of great burying tunnel excavation radiuses, 3r indicate 3 times Great burying tunnel excavation radius, 4r indicate that 4 times of great burying tunnel excavation radiuses, 5r indicate 5 times of great burying tunnel excavation radiuses；

Attached drawing 4: for stalk formula great burying tunnel of the present invention equivalent cross-section schematic diagram, in figure, rectangle indicates that stalk formula is buried greatly The true form of deep tunnel excavation contoured surface, roundlet indicate that stalk formula great burying tunnel is reduced to circular tunnel, and great circle indicates big Buried depth tunnel equivalent cross-section, 1r indicate that 1 times of great burying tunnel excavation radius, 2r indicate 2 times of great burying tunnel excavation radiuses, 3r table Show that 3 times of great burying tunnel excavation radiuses, 4r indicate that 4 times of great burying tunnel excavation radiuses, 5r indicate 5 times of great burying tunnel excavations half Diameter；

Attached drawing 5: for equivalent cross-section rate of deformation subregion schematic diagram in great burying tunnel of the present invention, in figure, that the smallest circle Shape indicates great burying tunnel excavation profile, that maximum circle indicates great burying tunnel equivalent cross-section, that intermediate is round Indicate the region of 3 times of excavation radiuses, 1 indicates 1 times of radius of great burying tunnel excavation profile, and 2 indicate great burying tunnel excavation wheel 2 times of wide radiuses, 3 indicate 3 times of radiuses of great burying tunnel excavation profile, and 4 indicate 4 sesquialters of great burying tunnel excavation profile Diameter, 5 indicate 5 times of radiuses of great burying tunnel excavation profile；A_{It is deep}Area is great burying tunnel excavation profile, is METHOD FOR LARGE DEFORMATION ELASTOPLASTIC Area；B_{It is deep}Area is annulus composed by the circular arc of 1 times of radius and 3 times of radiuses, is plasticity small deformation area；C_{It is deep}Area is 3 times of radiuses and 5 times Annulus composed by the circular arc of radius is elastic-plastic deformation area；

Attached drawing 6: for 25 axial symmetry subregions of the invention and great burying tunnel equivalent cross-section schematic diagram, in figure, number 1 is indicated 1 times of great burying tunnel excavation radius, number 2 indicate 2 times of great burying tunnel excavation radiuses, and number 3 indicates that 3 times of great burying tunnels are opened Radius is dug, number 4 indicates 4 times of great burying tunnel excavation radiuses, and number 5 indicates that 5 times of great burying tunnel excavation radiuses, roundlet indicate Great burying tunnel excavation contoured surface, great circle indicate that great burying tunnel circle equivalent cross-section, middle circle indicate elasto-plastic range (elasto-plastic region) and plastic zone Boundary, with great burying tunnel circle equivalent cross-section it is tangent it is big square be known as great burying tunnel square equivalent cross-section, should Two equivalent cross-sections are referred to as great burying tunnel equivalent cross-section, and tangent small square is great burying tunnel equivalent cross-section axis with roundlet One of symmetric partitioning, by symmetry principle, there are also 24 axial symmetry subregions；

Attached drawing 7: subdividing the mechanical deformation relative quantity schematic diagram in area for equivalent cross-section subregion of the present invention and kernel, in figure, The small rectangle of most intermediate 4 indicates that the subregion where great burying tunnel contour, remaining 24 medium rectangles indicate equivalent disconnected By symmetry principle there are also 24 axial symmetry subregions, subregion where 24 subregions and great burying tunnel contour constitutes together to be buried greatly in face Deep tunnel equivalent cross-section, the digital representation mechanical deformation relative quantity in every lattice；

Attached drawing 8: model schematic is broken out for the prominent disaster of gushing in the general great burying tunnel of the present invention, it is vertical to belong to great burying tunnel To sectional schematic diagram, in figure, G_{It is deep non-}Indicate Fei Tuyong hidden danger area, G_{Deep mistake}It indicates prominent and gushes hidden danger transition region, G_{Deep hidden 1}Indicate that neighbouring dash forward is gushed The first segment Tu Yong hidden danger area of hidden danger transition region, G_{Deep hidden 2}Indicate second segment Tu Yong hidden danger area, G_{Deep hidden i}Indicate the i-th Duan Tuyong hidden danger area；

Attached drawing 9: model schematic is broken out for the prominent disaster of gushing in the special great burying tunnel of the present invention, it is vertical to belong to great burying tunnel To sectional schematic diagram, in figure, G_{It is deep non-}Indicate Fei Tuyong hidden danger area, G_{Deep hidden 1}Indicate the first segment in neighbouring Fei Tuyong hidden danger area it is prominent gush it is hidden Suffer from area, G_{Deep hidden 2}Indicate second segment Tu Yong hidden danger area, G_{Deep hidden i}Indicate the i-th Duan Tuyong hidden danger area；

Attached drawing 10: for one group of great burying tunnel analytical unit section schematic diagram of the invention, belong to great burying tunnel longitudinal direction section Schematic diagram, in figure, one group of elementary section is made of 4 regions: the area Fei Tuyong prominent gush hidden danger transition region, Tu Yong hidden danger area 1, prominent gushes Hidden danger area 2, D_{It is deep}-D_{It is deep}Section is current face, G_{Before deep hidden 1}Indicate that prominent before improvement of Tu Yong hidden danger area 1 gushes earthquake intensity, G_{Before deep hidden 2}It indicates Prominent before improvement gushes earthquake intensity in Tu Yong hidden danger area 2；

Attached drawing 11: for the governing project schematic diagram of first circulation of the present invention, belonging to great burying tunnel longitudinal direction sectional schematic diagram, In figure, D_{It is deep}-D_{It is deep}Section is current face, B_{It is deep}B_{It is deep}-E_{It is deep}E_{It is deep}Region is to be administered area, G_{Deep hidden 1 plan}Tu Yong hidden danger area 1 is planned in expression Prominent gush earthquake intensity by G_{Before deep hidden 1}Promote G_{Deep hidden 1 plan}, G_{Before deep hidden 2}Indicate that prominent before improvement of Tu Yong hidden danger area 2 gushes earthquake intensity；

Attached drawing 12: the still underproof schematic diagram of quality after being administered for first circulation Tu Yong hidden danger area 1 of the present invention belongs to big Buried depth tunnel longitudinal direction sectional schematic diagram, in figure, G_{After deep hidden 1}The prominent of Tu Yong hidden danger area 1 is gushed earthquake intensity by G by expression_{Before deep hidden 1}It is promoted G_{After deep hidden 1}, G_{After deep hidden 1}>+64% indicates that quality is still unqualified after being administered, G_{Before deep hidden 2}It is strong to indicate that prominent before improvement of Tu Yong hidden danger area 2 is gushed Degree；

Attached drawing 13: up-to-standard schematic diagram after being administered for first circulation Tu Yong hidden danger area 1 of the present invention belongs to great burying Tunnel longitudinal direction sectional schematic diagram, in figure, G_{After deep hidden 1}The prominent of Tu Yong hidden danger area 1 is gushed earthquake intensity by G by expression_{Before deep hidden 1}Promote G_{After deep hidden 1}, G_{After deep hidden 1}<+64% indicates up-to-standard, C after being administered_{It is deep}-C_{It is deep}Section indicates that finished section, G are excavated in the quasi- plan of first circulation_{Before deep hidden 2} Indicate that prominent before improvement of Tu Yong hidden danger area 2 gushes earthquake intensity；

Attached drawing 14: start the schematic diagram that second circulation is administered after excavating for first circulation of the present invention, belong to great burying tunnel Face in figure, is advanced to C by longitudinal sectional schematic diagram_{It is deep}-C_{It is deep}Section, G_{Before deep hidden 2}Indicate Tu Yong hidden danger area 2 before improvement It is prominent to gush earthquake intensity, G_{Before deep hidden 3}Indicate that the prominent of subsequent section in Tu Yong hidden danger area 2 gushes earthquake intensity.

Specific embodiment

Below in conjunction with specific embodiment, the present invention is described in more detail, but is not limited to protection scope of the present invention.

Embodiment 1

A kind of prominent hidden danger degree tri-layer that gushes in great burying tunnel recycles progressive quantization method；As the buried depth h in tunnel_{It buries}> 40r, Or h_{It buries}> 20B, the tunnel are referred to as great burying tunnel；The prominent first layer for the gushing hidden danger degree time quantization in great burying tunnel is first definitely The prominent of mass gushes source shape factor J_{It is deep}；The quantization of second level is by J_{It is deep}Add with the construction disturbance factor of great burying tunnel cross-section With synthesis, obtain that great burying tunnel equivalent cross-section is prominent to gush earthquake intensity G_{It is deep}；The quantization of third level is vertical according to great burying constructing tunnel To influence length L_{It is vertical}It dashes forward with equivalent cross-section and gushes earthquake intensity G_{It is deep}, the prominent degree of danger for gushing disaster of estimation great burying tunnel tunnel face outburst W_{It is deep}；Tri-layer quantifies by ground mass to section again to paragraph, and by part to entirety, quantization, assessment, improvement circulation are progressive, gradually Each section of prominent hidden danger of gushing is eliminated.

(1) definition in great burying tunnel

If h_{It buries}> 40r or h_{It buries}> 20B, the tunnel are referred to as great burying tunnel.

(2) concept of ground mass is defined

Great burying tunnel underground environment is often complicated and changeable and uneven, and each region environmental hydrogeology condition is constituted not Must be identical, but to a certain extent by range shorter, it can always find one piece of uniform region of hydrogeologic condition；With phase Under conditions of the region of hydrogeologic condition, which can be considered as the ground mass of homogeneous, for example, water pressure, Surrounding Rock Strength, As one the mass that composition target particle size or parameter almost the same region regards；Certain block mass vary, as low as only account for According to the certain positions in great burying tunnel, greatly to occupying great burying tunnel certain area.

(3) the great burying tunnel of mass is prominent gushes hidden danger degree

R_{It encloses deeply}- it is great burying tunnel a part country rock axial compressive strength, measurement unit: MPa.

Outside 2 meters of the Surrounding Rock Strength of wall；

3. no water cavity hole is in great burying tunnel, hydraulic pressure uniformly takes 0.5MPa, and great burying tunnel surrounding intensity takes chamber hole wall Outside 2 meters of Surrounding Rock Strength.

B, hydrogeology data in great burying tunnel acquire method:

(1) equivalent cross-section in great burying tunnel is determined

For round great burying tunnel, Fig. 1 is seen, when the great burying tunnel surrounding of big deep-lying tunnel face is excavated When, there is stress-strain adjustment in section, adjusts relationship according to section stress-strain, and round great burying tunnel is adjusted radius Range is that the round great burying tunnel cross-section of 5r is determined as the equivalent cross-section in round great burying tunnel, is detailed in Fig. 2.

For non-circular great burying tunnel, then using the center of great burying tunnel cross-section as the center of circle, with outline excavation linear distance The maximum distance in the center of circle is radius r, draws to obtain a small circular, then centered on the center of circle of the roundlet, is 5r drafting with radius One great circle, then the great circle is determined as the equivalent cross-section in non-circular great burying tunnel, is detailed in Fig. 3 and Fig. 4.

(2) subregion and assignment are carried out to great burying tunnel equivalent cross-section, the subregion including following scenario described:

1. the mechanics subregion of great burying tunnel equivalent cross-section

Great burying tunnel equivalent cross-section is divided into three mechanics areas: METHOD FOR LARGE DEFORMATION ELASTOPLASTIC area A_{It is deep}, plasticity small deformation area B_{It is deep}, bullet modeling Property area C_{It is deep}, it is detailed in Fig. 5.

2. the geometric zoning of great burying tunnel equivalent cross-section

Great burying tunnel equivalent cross-section is divided into 25 subregions, the size of each subregion is the square of 2r × 2r, 25 A geometric zoning combines to have obtained the big square of a 10r × 10r, which is 5r in radius_{It is deep}Draw a great circle It is tangent and close to the great circle, so, big square is also referred to as great burying tunnel equivalent cross-section, is detailed in Fig. 6.

According to great burying Tunnel Displacement deformation measurement data statistics, C is determined_{It is deep}The rate of deformation in area is less than 0.1mm/d；B_{It is deep}Area Rate of deformation be 0.1~1.0mm/d；A_{It is deep}The rate of deformation in area is greater than 1.0mm/d, and 5.0mm/d is greater than when serious.Further according to change The magnitude of shape rate carries out assignment to each equivalent cross-section subregion in great burying tunnel, establishes each subregion of great burying tunnel equivalent cross-section Assignment table.

A_{It is deep}The minimal deformation rate in area is C_{It is deep}The 10 of area's maximum distortion rate⁺¹Times, if C_{It is deep}The magnitude benchmark of area's rate of deformation It is determined as 10, i.e., 10⁺¹, then A_{It is deep}The magnitude of the rate of deformation in area is just 10⁺²；A_{It is deep}The rate of deformation in area has 2 grades, then it becomes Shape velocity magnitude median numbers are just (100+500)/2=300；B_{It is deep}Area occupy A_{It is deep}Area's minimal deformation rate and C_{It is deep}Area's maximum distortion speed Between rate, then B_{It is deep}The median numbers of the rate of deformation magnitude in area are just (10+100)/2=55.

Second is the assignment that the subregion of other column is adjusted by the size with great burying tunnel distance, with great burying tunnel position That set is classified as benchmark, far from a subregion, descent coefficient 0.2.

(5) great burying tunnel kernel subdivision area and assignment

Great burying tunnel kernel can subdivide area, can be with percentages assignment according to upper and lower importance assignment.

(6) the assignment achievement of each subregion in great burying tunnel, is detailed in Fig. 7.

Q_{Deep i}=J_{Deep i}×Ν_{Deep i}×ξ_{It is deep}；In formula:

1. when the boundary of subregion is that water-filling fills mud chamber hole, ξ when subregion is located at arcade upper_{It is deep}1.3 are taken, subregion is located at and tunnel ξ when at same elevation_{It is deep}1.20 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.15.

2. when the boundary of subregion is water filling cavity hole, ξ when subregion is located at arcade upper_{It is deep}1.20 are taken, subregion is located at same with tunnel ξ when at one elevation_{It is deep}1.15 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.13.

3. when the boundary of subregion is dry chamber hole, ξ when subregion is located at arcade upper_{It is deep}1.15 are taken, subregion is located at same with tunnel ξ when at elevation_{It is deep}1.13 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.05.

4. when the boundary of subregion is non-chamber hole, ξ_{It is deep}Take 1.05.

25 the prominent of subregion whole in tunnel equivalent cross-section are gushed into intensity addition, total dash forward for obtaining tunnel equivalent cross-section is gushed by force Degree, it is public

Formula calculates are as follows:

ξ_{It is deep}- be each subregion of great burying tunnel equivalent cross-section edge effect coefficient.

(9) tunnel Reference Equivalent section is determined

As the great burying tunnel source the Tu Yong shape factor J of 25 subregions in tunnel equivalent cross-section_{It is deep}Value is 10^-2When, then should Tunnel equivalent cross-section is tunnel Reference Equivalent section, and total prominent intensity of gushing of tunnel Reference Equivalent section is 7.86.

Q_{Deep benchmark}- for tunnel Reference Equivalent section it is total dash forward gush intensity, value 7.86.

(11) three classes unit section is established

Non- dash forward gushes section: -100%≤G_{It is deep}< 0；

Transition section: 0≤G_{It is deep}≤+64%；

General dash forward gushes hidden danger section :+64% < G_{It is deep}≤+900%

Special dash forward gushes hidden danger section: G_{It is deep}>+900%.

(1) the prominent concept for gushing cellular zone is proposed

Great burying tunnel paragraph is made of numerous equivalent cross-section, if wherein prominent the gushing of certain great burying tunnel equivalent cross-section Earthquake intensity G_{It is deep}It is determined as maximum value after sorted, to set the equivalent cross-section can represent certain paragraph, then great burying tunnel paragraph It is prominent to gush hidden danger degree and be equal to G_{It is deep}。

As -100%≤G_{It is deep}It is the area Fei Tuyong when < 0；

Work as G_{It is deep}When >+900%, referred to as special Tu Yong hidden danger area.

It is prominent to gush disaster when each great burying tunnel paragraph is gushed cellular zone and formed by the area Fei Tuyong, two, Tu Yong hidden danger area are prominent It always just breaks out, will not be just broken out after driving gos deep into Tu Yong hidden danger area in advance in the area Fei Tuyong close to Tu Yong hidden danger area, It is detailed in Fig. 9.

(3) determine that construction disturbance longitudinally influences length

When tunnel is general buried depth tunnel, i.e. 5r≤h_{It buries}≤ 40r or 2.5B≤h_{It buries}When≤20B, it is longitudinal influence length be by The index of correlation value in general buried depth tunnel, because uncorrelated to great burying tunnel, so the present invention is not specifically described.

When tunnel is great burying tunnel, and 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical}For 1.7B §_{It is deep}, B is tunnel excavation width, and r is tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep} Value is 1.0, § when serious_{It is deep}Value is 1.2.

When tunnel is great burying tunnel, and h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 2.0B §_{It is deep}, B is tunnel Excavation width, r are tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, § when serious_{It is deep}Value is 1.2.

When tunnel is great burying tunnel, and 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical}For 1.1B §_{It is deep}, B is tunnel excavation width, and r is tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep} Value is 1.0, § when serious_{It is deep}Value is 1.2.

When tunnel is great burying tunnel, and h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 1.3B §_{It is deep}, B is tunnel Excavation width, r are tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, § when serious_{It is deep}Value is 1.2.

(4) longitudinal to influence length L_{It is vertical}Amendment

G_{Deep hidden 1}- it is to gush earthquake intensity, no guiding principle amount near prominent the prominent of that Tu Yong hidden danger area for gushing transition region.

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out base When this model is consistent, modified longitudinal influence datum length L_{It repairs}Calculation formula are as follows:

G_{Deep hidden 1}- it is to gush earthquake intensity near prominent the prominent of that Tu Yong hidden danger area for gushing transition region.

L_{It is deep surplus}- it is residue length, value range is 0≤L_{It is deep surplus}≤L_{It repairs deeply}, measurement unit: rice.

(1) the safety state of current face is assessed

One group of great burying tunnel analytical unit section is divided into 4 specific regions: Fei Tuyong hidden danger area altogether, prominent come through is crossed Area, Tu Yong hidden danger area 1, Tu Yong hidden danger area 2；Current face position is D_{It is deep}-D_{It is deep}；

If DB=L_{1 is repaired deeply}, the prominent degree of danger for gushing disaster of face outburst is 0, is in critical state, cannot excavate forward； If DB > L_{1 is repaired deeply}, the prominent degree of danger for gushing disaster of face outburst is in a safe condition less than 0, can excavate forward again；If D_{It is deep} B_{It is deep}<L_{1 is repaired deeply}, the prominent degree of danger for gushing disaster of face outburst is in the hole greater than 0, needs to close immediately, reinforces area Face；It is detailed in and sees Figure 10.

For example, the Guangxi tunnel Jun Chang paragraph, 40r < h_{It buries}≤ 100r or 20B < h_{It buries}≤ 50B is great burying tunnel paragraph, water 4 specific regions in literary complicated geology location, the data after three layered quantizations are as follows: Fei Tuyong hidden danger area, G_{It is deep non-}=- 50%, it is prominent to gush transition region, G_{Deep mistake}=+30%, Tu Yong hidden danger area 1, G_{Deep hidden 1}=+450%, Tu Yong hidden danger area 2, G_{Deep hidden 2}=+300%, B =12.75 meters, §_{It is deep}Value is 1.0；Current tunnel tunnel face position is D_{It is deep}-D_{It is deep}, D_{It is deep}B_{It is deep}=5 meters, total yield is 35 cubes M/h.

At this moment, method according to the present invention: L_{It is vertical}=1.7B §_{It is deep}, L_{It repairs deeply}=L_{It is vertical}×(G_{Deep hidden 1})/(900%-64%)=1.7 × 12.75 × 1.0 × 450%/(900%-64%)=11.67 meter；W_{It is deep}=(11.67-5)/11.67=57%.

The method of the present invention, for current D_{It is deep}-D_{It is deep}For face, D_{It is deep}B_{It is deep}=5 meters, D_{It is deep}B_{It is deep}<L_{1 is repaired deeply}, i.e., 5 meters < 11.67 Rice, the prominent degree of danger quantized value for gushing disaster of outburst is W_{It is deep}=57%, the prominent degree of danger for gushing disaster of face outburst is greater than 0, It is in the hole, it needs to close immediately, reinforce face；

Conventional method is judged that total yield is 35 cubes ms/h, in 4 < Q by the condition of table 1_{It is deep}≤ 41 area Between, qualitative is small-sized disaster, for current D_{It is deep}-D_{It is deep}For face, the prominent degree of danger for gushing disaster of outburst can not then judge.

Actual conditions are: being excavated to D_{It is deep}-D_{It is deep}Face, the prominent omen for gushing disaster generation persistently occur, and deformation of tunnel increases, Water yield increases, and face country rock falls that grain, chip off-falling are intensive, and situation is extremely dangerous, is held back later by closing immediately, reinforcing face The prominent outburst for gushing disaster is made.

According to actual conditions, compares the method for the present invention and conventional method, the method for the present invention relatively accurately predict area The prominent degree of danger for gushing disaster of the outburst in face, can provide reply method, and conventional method only carries out front hidden danger degree It is qualitative, it can not judge the current prominent degree of danger for gushing disaster of face outburst, reply method cannot be given.

Work as D_{It is deep}B_{It is deep}≧L_{1 is repaired deeply}When, under face is in a safe condition or critical state, Tu Yong hidden danger area 1 is prominent before improvement Gushing earthquake intensity is G_{Before deep hidden 1}, drafting management goal is G_{Deep hidden 1 plan}；According to G_{Deep hidden 1 plan}It can estimate facing for the improvement section in Tu Yong hidden danger area 1 Boundary radius (H_{It is deep}+r_{It is deep}), that is, plan the section critical range administered；It is detailed in Figure 11.

For example, the Guangxi tunnel Jun Chang paragraph, 40r < h_{It buries}≤ 100r or 20B < h_{It buries}≤ 50B is great burying tunnel paragraph, water 4 specific regions of certain paragraph in literary complicated geology location, the data after three layered quantizations are as follows: Fei Tuyong hidden danger area, G_{It is deep non-} =-50%, it is prominent to gush transition region, G_{Deep mistake}=+30%, Tu Yong hidden danger area 1, G_{Deep hidden 1}=+450%, Tu Yong hidden danger area 2, G_{Deep hidden 2}=+ 300%, B=12.75 meters, §_{It is deep}Value is 1.0；Tunnel tunnel face position is advanced to D_{It is deep}-D_{It is deep}, D_{It is deep}B_{It is deep}=5 meters, total yield is 35 cubes ms/h, the prominent omen for gushing disaster generation persistently occurs, and deformation of tunnel increases, and water yield increases, and face country rock falls Grain, chip off-falling are intensive, and situation is extremely dangerous, later by closing immediately, reinforcing face, step back face, D_{It is deep}B_{It is deep}=12 meters, The prominent omen phenomenon for gushing disaster generation disappears, and at this moment total yield is 40 cubes ms/h.

At this moment, by the method for the present invention, D at present_{It is deep}B_{It is deep}=12 meters, L_{It is vertical}=1.7B §_{It is deep}, L_{It repairs deeply}=L_{It is vertical}×(G_{Deep hidden 1})/(900%- 64%)=1.7 × 12.75 × 1.0 × 450%/(900%-64%)=11.67 meter, D_{It is deep}B_{It is deep}≧L_{1 is repaired deeply}, i.e. 12 meter ≤11.67 Rice, under face is in a safe condition, it is G that prominent before improvement of Tu Yong hidden danger area 1, which gushes earthquake intensity,_{Before deep hidden 1}=+450%, in order to reach Regulation effect, drafting management goal is G_{Deep hidden 1 plan}It is necessarily less than or equal to+64%；According to G_{Deep hidden 1 plan}=+64%, just using step 2 Can Fan Gutuyong hidden danger area 1 improvement section critical radius (H_{It is deep}+r_{It is deep}), that is, plan the section critical range administered.

Traditionally, judged according to the condition of table 1, step back face, D_{It is deep}B_{It is deep}It is=12 meters, prominent to gush disaster Omen phenomenon disappear, it is 40 cubes ms/h that total yield is increased to by 35 cubes ms/h, be in 4 < Q_{It is deep}≤ 41 Section, still qualitative is small-sized disaster, and water yield is controlled and referred in which numerical value for qualification by but the improvement for Tu Yong hidden danger area 1 Mark, it is difficult to provide answer, the section critical range for how estimating that plan is administered also has been difficult to clear method and scheme.

The method of the present invention and conventional method are compared, controlling for first circulation is carried out to the Tu Yong hidden danger area of current front of tunnel heading Reason, about plan governance quality, plan treatment range, the method for the present invention has explicit path, scheme, an answer, and conventional method It is difficult to submit a plan governance quality, plan treatment range, without answer.

It is prominent to gush earthquake intensity and become G after Tu Yong hidden danger area 1 is administered_{After deep hidden 1}If G_{After deep hidden 1}>+64%, then judge that governance quality does not conform to Lattice need to supplement improvement；It is detailed in Figure 12；If G_{After deep hidden 1}≤+64%, judge governance quality qualification；After administering qualification, it can excavate, open It digs from D_{It is deep}-D_{It is deep}To C_{It is deep}-C_{It is deep}, modified datum length and G_{Before deep hidden 2}It is related, it is to be ensured that C_{It is deep}E_{It is deep}≧L_{2 are repaired deeply}, it is the excavation of first circulation Final face can only excavate C_{It is deep}-C_{It is deep}The position of section；It is detailed in Figure 13.

For example, the Guangxi tunnel Jun Chang paragraph, 40r < h_{It buries}≤ 100r or 20B < h_{It buries}≤ 50B is great burying tunnel paragraph, warp After improvement, 4 specific regions of certain paragraph of hydrogeological complex ground, the data after three layered quantizations are as follows: non-dash forward is gushed Hidden danger area, G_{It is deep non-}=-50%, it is prominent to gush transition region, G_{Deep mistake}=+30%, Tu Yong hidden danger area 1, G_{After deep hidden 1}=+45%, Tu Yong hidden danger area 2, G_{Deep hidden 2}=+300%, B=12.75 meters, §_{It is deep}Value is 1.0, and total yield is 14 cubes ms/h.

For the method for the present invention, Tu Yong hidden danger area 1 is after administering, at this moment, G_{After deep hidden 1}=+45%, i.e. G_{After deep hidden 1}≤+64%, sentence Disconnected governance quality is qualified；Administer it is qualified after, can excavate, section excavation is from D_{It is deep}-D_{It is deep}To C_{It is deep}-C_{It is deep}, at this moment formula L_{2 are repaired deeply}=L_{It is vertical}× (G_{Deep hidden 1})/(900%-64%) " G_{Deep hidden 1}" should be Tu Yong hidden danger area 2 " G_{Deep hidden 2}", that is, L_{It is vertical}=1.7B §_{It is deep}, L_{2 are repaired deeply}=1.7 × 12.75 × 1.0 × 300%/(900%-64%)=7.78 meter, it is to be ensured that C_{It is deep}E_{It is deep}≤ 7.78 meters.

For conventional method, after administering, total yield is dropped to by original 35 cubes ms/h in Tu Yong hidden danger area 1 Total yield is 14 cubes ms/h, is judged by the condition of table 1, total yield is in 4 < Q_{It is deep}≤ 41 section, it is qualitative to be The property of small-sized disaster, Tu Yong hidden danger area 1 is still unconverted, and governance quality is unqualified.

Actual conditions are: building-site thinks Tu Yong hidden danger area 1 after administering, and governance quality is qualified, determines to excavate, will slap Sub- face is advanced to C_{It is deep}-C_{It is deep}, C_{It is deep}E_{It is deep}=8.5 meters, be to make C_{It is deep}E_{It is deep}≤ 7.78 meters, entire digging process safety, both without dashing forward Disaster is gushed, does not also occur the prominent omen situation for gushing disaster.

According to the effect that actual conditions, comparison the method for the present invention and conventional method obtain respectively, to current front of tunnel heading Improvement area regulation effect carry out assessment and excavate decision, the method for the present invention is relatively consistent with practical, and conventional method is to be difficult to sentence Disconnected governance quality effect also can not provide decision data to excavate.

(4) start improvement, the assessment, excavation of second circulation

After excavating to the improvement area part of first circulation, current face position is advanced to C_{It is deep}-C_{It is deep}, start second circulation Improvement, the second the prominent of improvement area is gushed by earthquake intensity tests, if qualified, starts the excavation of second circulation, so circulation is gone down, Until Tu Yong hidden danger area is eliminated, it is detailed in Figure 14.

See Figure 14, the Guangxi tunnel Jun Chang paragraph, 40r < h_{It buries}≤ 100r or 20B < h_{It buries}≤ 50B is great burying tunnel paragraph, After administering, 4 specific regions of certain paragraph of hydrogeological complex ground, the data after three layered quantizations are as follows: non-prominent Gush hidden danger area, G_{It is deep non-}=-50%, it is prominent to gush transition region leading portion G_{Deep mistake}=+30%, it is prominent to gush transition region back segment G_{Deep mistake}=+45%, dashing forward, it is hidden to gush Suffer from area 1 to be modified, Tu Yong hidden danger area 2, G_{Deep hidden 2}=+300%, B_{It is deep}=12.75 meters, §_{It is deep}Value is 1.0, C_{It is deep}E_{It is deep}It=8 meters, always gushes Water is 14 cubes ms/h.

For the method for the present invention, C_{It is deep}E_{It is deep}=8.5 meters, present C_{It is deep}E_{It is deep}≤ 7.78 meters, judge current C_{It is deep}-C_{It is deep}Face is peace Complete, although Tu Yong hidden danger area 2, there are hidden danger, current face, which will not break out to dash forward, gushes disaster, second circulation can be started Improvement.

For conventional method, judged by the condition of table 1, total yield is in 4 < Q_{It is deep}≤ 41 section, qualitative is small-sized Disaster, but for current C_{It is deep}-C_{It is deep}Face, if can break out to dash forward and gush disaster, can not judge.

Actual conditions are: when face is advanced to C_{It is deep}-C_{It is deep}, do not break out to dash forward and gush disaster, also gushes disaster without occurring dashing forward Omen situation.

Comparison conventional method and the method for the present invention, the judgement of the method for the present invention are consistent with actual conditions, the method for the present invention one A link links closely next link, this Cyclic Service can accomplish to recycle progressive in lower circulation；And conventional method, by the item for pressing table 1 Part judged, is merely capable of carrying out qualitative to the prominent property of gushing in the Tu Yong hidden danger area 2 in front, can not be pacified to current face Danger is judged that the data of first circulation and the data of second circulation contact not by force, it is difficult to accomplish to recycle progressive.

Claims

1. a kind of prominent hidden danger degree tri-layer that gushes in great burying tunnel recycles progressive quantization method, which is characterized in that when burying for tunnel Deep h_{It buries}> 40r or h_{It buries}> 20B, the tunnel are referred to as great burying tunnel；The prominent first layer for the gushing hidden danger degree time quantization in great burying tunnel, It is that first definitely the prominent of mass gushes source shape factor J_{It is deep}；The quantization of second level is by J_{It is deep}With the construction of great burying tunnel cross-section Disturbance factor is integrated, and obtains that great burying tunnel equivalent cross-section is prominent to gush earthquake intensity G_{It is deep}；The quantization of third level is according to great burying Constructing tunnel longitudinally influences length L_{It is vertical}It dashes forward with equivalent cross-section and gushes earthquake intensity G_{It is deep}, estimation great burying tunnel tunnel face outburst is prominent to gush disaster Degree of danger W_{It is deep}；Tri-layer quantization is by ground mass to section again to paragraph, and by local to entirety, quantization, assessment are administered to recycle and be passed Into each section prominent is gradually gushed hidden danger and is eliminated.

2. the prominent hidden danger degree tri-layer that gushes in great burying tunnel according to claim 1 recycles progressive quantization method, feature It is, specific step is as follows for the method for the progressive quantization of the tri-layer:

(1) definition in great burying tunnel

(2) concept of ground mass is defined

Great burying tunnel underground environment is often complicated and changeable and uneven, and each region environmental hydrogeology condition composition may not phase Together, but to a certain extent by range shorter, one piece of uniform region of hydrogeologic condition can always be found；With identical water Under conditions of the region of literary geological conditions, which can be considered as the ground mass of homogeneous, for example, water pressure, Surrounding Rock Strength, composition Target particle size or the almost the same region of parameter regard as a ground mass；Certain block mass vary, as low as only occupy big The certain positions in buried depth tunnel, greatly to occupying great burying tunnel certain area；

(3) the great burying tunnel of mass is prominent gushes hidden danger degree

The great burying tunnel of ground mass is prominent to gush hidden danger degree, directly proportional to hydraulic pressure pressure, with great burying tunnel surrounding intensity at anti- Than, and it is related to country rock composition grain composition correction factor, J can be used_{It is deep}It indicates, referred to as the source great burying tunnel Tu Yong shape factor, The great burying tunnel source Tu Yong shape factor J_{It is deep}Calculation formula are as follows:

ε_{It is deep}- it is great burying tunnel surrounding grain composition correction factor, belong to no guiding principle figureofmerit；For non-Extra-fine sand soil, rock Stone, fixing tentatively value is 1.05；Extra-fine sand value is 1.15；

If A, great burying tunnel is chamber hole or solution cavity, J is calculated_{It is deep}When value, hydraulic pressure and the value of great burying tunnel surrounding intensity are pressed Following method:

1. great burying tunnel is pure water filling cavity hole, hydraulic pressure takes the hydraulic pressure of chamber hole core space, and great burying tunnel surrounding intensity takes chamber Outside 2 meters of the Surrounding Rock Strength of hole wall；

2. great burying tunnel is that water-filling fills mud chamber hole, hydraulic pressure chamber hole takes the hydraulic pressure of core space, and great burying tunnel surrounding intensity takes The intensity of the chamber hole core space soil body, if soil strength numeric ratio hydraulic pressure is low, great burying tunnel surrounding intensity take chamber hole wall to Outer 2 meters of Surrounding Rock Strength；

3. no water cavity hole is in great burying tunnel, hydraulic pressure uniformly takes 0.5MPa, and great burying tunnel surrounding intensity takes chamber hole wall outside 2 The Surrounding Rock Strength of rice；

B, hydrogeology data in great burying tunnel acquire method:

Pass through the hydraulic pressure and great burying tunnel surrounding intensity data that obtain underground water with test to the practical prospecting in great burying tunnel:

1. using conventional survey means, probing, probing, lossless detection and the more than one combination of advanced prediction obtain great burying tunnel Road Surrounding Rock Strength data are obtained or are converted to by compression test, cone penetration test, bearingtest, wave velocity testing method and is big Buried depth tunnel surrounding intensity；

2. obtaining water pressure data by following one of method: drilling ejectment water simultaneously measures hydraulic pressure, pore water pressure measuring instrument Hydraulic pressure is measured, pours water or grouting pressure fracturing method measurement hydraulic pressure, measurement water-head is converted to hydraulic pressure；

3. inferring great burying tunnel surrounding grain composition correction factor ε by conventional lithologic analysis_{It is deep}；

(1) determination of the equivalent cross-section in great burying tunnel

For round great burying tunnel, Fig. 1 is seen, when the great burying tunnel surrounding of big deep-lying tunnel face is excavated, There is stress-strain adjustment in section, adjusts relationship according to section stress-strain, and round great burying tunnel is adjusted radius It is determined as the equivalent cross-section in round great burying tunnel for the round great burying tunnel cross-section of 5r, is detailed in Fig. 2；

For non-circular great burying tunnel, then using the center of great burying tunnel cross-section as the center of circle, with the outline excavation linear distance center of circle Maximum distance be radius r, draw to obtain a small circular, then centered on the center of circle of the roundlet, with radius be 5r draw one Great circle, then the great circle is determined as the equivalent cross-section in non-circular great burying tunnel, is detailed in Fig. 3 and Fig. 4；

(2) great burying tunnel equivalent cross-section carries out subregion and assignment

Subregion and assignment are carried out to great burying tunnel equivalent cross-section, the subregion including following scenario described:

1. the mechanics subregion of great burying tunnel equivalent cross-section

Great burying tunnel equivalent cross-section is divided into three mechanics areas: METHOD FOR LARGE DEFORMATION ELASTOPLASTIC area A_{It is deep}, plasticity small deformation area B_{It is deep}, elasto-plastic range (elasto-plastic region) C_{It is deep}, it is detailed in Fig. 5；

2. the geometric zoning of great burying tunnel equivalent cross-section

Great burying tunnel equivalent cross-section is divided into 25 subregions, the size of each subregion is the square of 2r × 2r, and 25 several What partition conbination has obtained the big square of a 10r × 10r, which is that one great circle of 5r drafting is tangent simultaneously in radius Close to the great circle, so, big square is also referred to as great burying tunnel equivalent cross-section, is detailed in Fig. 6；

According to great burying Tunnel Displacement deformation measurement data statistics, C is determined_{It is deep}The rate of deformation in area is less than 0.1mm/d；B_{It is deep}The change in area Shape rate is 0.1~1.0mm/d；A_{It is deep}The rate of deformation in area is greater than 1.0mm/d, and 5.0mm/d is greater than when serious.Further according to deformation speed The magnitude of rate carries out assignment to each equivalent cross-section subregion in great burying tunnel, establishes each subregion assignment of great burying tunnel equivalent cross-section Table；

A_{It is deep}The minimal deformation rate in area is C_{It is deep}The 10 of area's maximum distortion rate⁺¹Times, if C_{It is deep}The magnitude benchmark of area's rate of deformation determines It is 10, i.e., 10⁺¹, then A_{It is deep}The magnitude of the rate of deformation in area is just 10⁺²；A_{It is deep}The rate of deformation in area has 2 grades, then its deformation speed Rate magnitude median numbers are just (100+500)/2=300；B_{It is deep}Area occupy A_{It is deep}Area's minimal deformation rate and C_{It is deep}Area's maximum distortion rate it Between, then B_{It is deep}The median numbers of the rate of deformation magnitude in area are just (10+100)/2=55；

The first is by the assignment of the subregion of the importance adjustment tunnel column of top, lower part, with the position in great burying tunnel On the basis of, important coefficient is taken as 1.0, and every to rise a subregion coefficient raising 0.2, every one subregion coefficient of decline reduces by 0.2；

Second is the assignment that the subregion of other column is adjusted by the size with great burying tunnel distance, with great burying tunnel location That is classified as benchmark, far from a subregion, descent coefficient 0.2；

(5) great burying tunnel kernel subdivision area and assignment

Q_{Deep i}=J_{Deep i}×Ν_{Deep i}×ξ_{It is deep}；In formula:

J_{Deep i}- it is the corresponding great burying tunnel source the Tu Yong shape factor of subregion, J_{Deep i}The value range of value is 0≤J_{Deep i}≤10^-1, when J_{Deep i}> 10^-1When, J_{Deep i}Being worth same value is 1 × 10^-1；

1. when the boundary of subregion is that water-filling fills mud chamber hole, ξ when subregion is located at arcade upper_{It is deep}1.3 are taken, subregion is located at same with tunnel ξ when at elevation_{It is deep}1.20 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.15；

2. when the boundary of subregion is water filling cavity hole, ξ when subregion is located at arcade upper_{It is deep}1.20 are taken, subregion is located at and the same height in tunnel ξ when at journey_{It is deep}1.15 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.13；

3. when the boundary of subregion is dry chamber hole, ξ when subregion is located at arcade upper_{It is deep}1.15 are taken, subregion is located at and the same elevation in tunnel ξ when place_{It is deep}1.13 are taken, subregion is located at ξ when under tunnel_{It is deep}Take 1.05；

25 the prominent of subregion whole in tunnel equivalent cross-section are gushed into intensity addition, total dash forward for obtaining tunnel equivalent cross-section gushes intensity, Calculation formula are as follows:

(9) tunnel Reference Equivalent section is determined

As the great burying tunnel source the Tu Yong shape factor J of 25 subregions in tunnel equivalent cross-section_{It is deep}Value is 10^-2When, then the tunnel Equivalent cross-section is tunnel Reference Equivalent section, and total prominent intensity of gushing of tunnel Reference Equivalent section is 7.86；

G_{It is deep}- it is that the prominent of great burying tunnel equivalent cross-section gushes earthquake intensity, it is to indicate relative to tunnel Reference Equivalent section, tunnel is practical The prominent opposite degree of strength for gushing hidden danger of equivalent cross-section, belongs to no guiding principle amount；

(11) three classes unit section is established

It is non-it is prominent gush section, transition section, the prominent foundation for gushing hidden danger section three classes unit section, wherein each unit section it is prominent gush it is strong Spend G_{It is deep}Value is respectively as follows:

Non- dash forward gushes section: -100%≤G_{It is deep}< 0；

Transition section: 0≤G_{It is deep}≤+64%；

Special dash forward gushes hidden danger section: G_{It is deep}>+900%；

(1) the prominent concept for gushing cellular zone is proposed

Great burying tunnel paragraph is made of numerous equivalent cross-section, if wherein the prominent of certain great burying tunnel equivalent cross-section gushes earthquake intensity G_{It is deep}It is determined as maximum value after sorted, certain paragraph can be represented by setting the equivalent cross-section, then the prominent of great burying tunnel paragraph is gushed Hidden danger degree is equal to G_{It is deep}；

If the prominent of equivalent cross-section that represent of certain great burying tunnel section gushes earthquake intensity as G_{It is deep}, then great burying tunnel, which is dashed forward, gushes the area of cellular zone Dividing has following situation:

As -100%≤G_{It is deep}It is the area Fei Tuyong when < 0；

When each great burying tunnel paragraph by the area Fei Tuyong, it is prominent gush that transition region, three, Tu Yong hidden danger area are prominent to gush cellular zone and form, dash forward It gushes disaster always to gush transition region prominent and just break out in advance, will not just be broken out after driving gos deep into Tu Yong hidden danger area, be detailed in Fig. 8；

It is prominent to gush disaster always when each great burying tunnel paragraph is gushed cellular zone and formed by the area Fei Tuyong, two, Tu Yong hidden danger area are prominent It is just broken out in advance in the area Fei Tuyong close to Tu Yong hidden danger area, will not just break out, be detailed in after driving gos deep into Tu Yong hidden danger area Fig. 9；

(3) determine that construction disturbance longitudinally influences length

1. gushing disaster when each great burying tunnel paragraph cellular zone composition situation and general tunnel are prominent to break out basic model consistent When, it constructs in prominent gush in transition region, construction disturbance influences length L to the longitudinal of front_{It is vertical}Are as follows:

When tunnel is general buried depth tunnel, i.e. 5r≤h_{It buries}≤ 40r or 2.5B≤h_{It buries}When≤20B, longitudinal length that influences is by The index of correlation value in buried depth tunnel, because uncorrelated to great burying tunnel, so the present invention is not specifically described；

When tunnel is great burying tunnel, and 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical}For 1.7B §_{It is deep}, B For tunnel excavation width, r is tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value It is 1.0, § when serious_{It is deep}Value is 1.2；

When tunnel is great burying tunnel, and h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 2.0B §_{It is deep}, B is tunnel excavation Width, r are tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, seriously When §_{It is deep}Value is 1.2；

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out basic mould When type is consistent, it first artificial must specify to dash forward and gush transition region, construct in artificially specified prominent gush in transition region, the longitudinal direction constructed to front Influence length L_{It is vertical}Are as follows:

When tunnel is great burying tunnel, and 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical}For 1.1B §_{It is deep}, B For tunnel excavation width, r is tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value It is 1.0, § when serious_{It is deep}Value is 1.2；

When tunnel is great burying tunnel, and h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 1.3B §_{It is deep}, B is tunnel excavation Width, r are tunnel excavation profile radius, §_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, seriously When §_{It is deep}Value is 1.2；

(4) longitudinal to influence length L_{It is vertical}Amendment

1. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and general great burying tunnel breaks out basic mould When type is consistent, longitudinal datum length L is corrected_{It repairs deeply}Calculation formula are as follows:

L_{It is vertical}- longitudinal direction influences length, measurement unit: rice；As 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical} For 1.7B §_{It is deep}；Work as h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 2.0B §_{It is deep}；B is tunnel excavation width, and r opens for tunnel Dig profile radius；§_{It is deep}For rock crusher degree regulation coefficient, § when general level_{It is deep}Value is 1.0, § when serious_{It is deep}Value is 1.2；

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out basic mould When type is consistent,

L_{It is vertical}- longitudinal direction influences length, measurement unit: rice；As 40r < h_{It buries}≤ 100r or 20B < h_{It buries}It is longitudinal to influence length L when≤50B_{It is vertical} For 1.1B §_{It is deep}；Work as h_{It buries}> 100r or h_{It buries}It is longitudinal to influence length L when > 50B_{It is vertical}For 1.3B §_{It is deep}；B is tunnel excavation width, and r opens for tunnel Dig profile radius；§_{It is deep}For rock crusher degree regulation coefficient, when general level, §_{It is deep}Value is 1.0, when serious, §_{It is deep}Value is 1.2；

The longitudinal datum length of the amendment of transition region is for preventing from backbreaking, when residue length is long more than or equal to longitudinal benchmark is corrected When spending, it will not break out to dash forward and gush disaster, degree of danger is zero or is negative value；When residue length, which is less than, corrects longitudinal datum length, Residue length is smaller, and the prominent degree of danger for gushing disaster of outburst is bigger；When residue length is equal to 0 meter, the prominent danger for gushing disaster of outburst Dangerous degree is 100%, necessarily occurs to dash forward and gushes disaster, and therefore, the prominent degree of danger for gushing disaster of face outburst calculates are as follows:

1. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and general great burying tunnel breaks out basic mould When type is consistent, calculation formula are as follows:

2. when the prominent disaster of gushing of each great burying tunnel paragraph cellular zone composition situation and special great burying tunnel breaks out basic mould When type is consistent, calculation formula are as follows:

(1) the safety state of current face is assessed

One group of great burying tunnel analytical unit section is divided into 4 specific regions: Fei Tuyong hidden danger area altogether, it is prominent to gush transition region, Tu Yong hidden danger area 1, Tu Yong hidden danger area 2；Current face position is D_{It is deep}-D_{It is deep}；If D_{It is deep}B_{It is deep}=L_{1 is repaired deeply}, face outburst is prominent to gush calamity Harmful degree of danger is 0, is in critical state, cannot excavate forward；If D_{It is deep}B_{It is deep}>L_{1 is repaired deeply}, the prominent danger for gushing disaster of face outburst Dangerous degree is in a safe condition less than 0, can excavate forward again；If D_{It is deep}B_{It is deep}<L_{1 is repaired deeply}, the prominent danger for gushing disaster of face outburst Degree is in the hole greater than 0, needs to close immediately, reinforces face；It is detailed in Figure 10；

Work as D_{It is deep}B_{It is deep}≧L_{1 is repaired deeply}When, under face is in a safe condition or critical state, prominent before improvement of Tu Yong hidden danger area 1 is gushed strong Degree is G_{Before deep hidden 1}, drafting management goal is G_{Deep hidden 1 plan}；According to G_{Deep hidden 1 plan}By step 2 can Fan Gutuyong hidden danger area 1 improvement section Critical radius (H_{It is deep}+r_{It is deep}), that is, plan the critical range administered, is detailed in Figure 11；

It is prominent to gush earthquake intensity and become G after Tu Yong hidden danger area 1 is administered_{After deep hidden 1}If G_{After deep hidden 1}>+64%, then judge that governance quality does not conform to Lattice need to supplement improvement, be detailed in Figure 12；

If G_{After deep hidden 1}≤+64%, judge governance quality qualification；Administer it is qualified after, can excavate, section excavation is from D_{It is deep}-D_{It is deep}To C_{It is deep}- C_{It is deep}, modified datum length and G_{Before 2 depths}It is related, it is to be ensured that C_{It is deep}E_{It is deep}≧L_{2 are repaired deeply}, it is the final face of the excavation of first circulation It can excavate and arrive C_{It is deep}-C_{It is deep}The position of section, is detailed in Figure 13；

(4) start improvement, the assessment, excavation of second circulation

After excavating to the improvement area part of first circulation, current face position is advanced to C_{It is deep}-C_{It is deep}, start controlling for second circulation Reason gushes earthquake intensity and tests, if qualified, begins to the excavation of second circulation, so circulation is gone down, directly to the second the prominent of improvement area It is eliminated to Tu Yong hidden danger area, is detailed in Figure 14.