CN107575256A - Material for shallow-buried sector transports system and Shallow Section earth's surface reinforcement means - Google Patents
Material for shallow-buried sector transports system and Shallow Section earth's surface reinforcement means Download PDFInfo
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- CN107575256A CN107575256A CN201711084147.3A CN201711084147A CN107575256A CN 107575256 A CN107575256 A CN 107575256A CN 201711084147 A CN201711084147 A CN 201711084147A CN 107575256 A CN107575256 A CN 107575256A
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- 230000032258 transport Effects 0.000 title claims abstract description 119
- 239000000463 material Substances 0.000 title claims abstract description 31
- 230000002787 reinforcement Effects 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 175
- 239000010959 steel Substances 0.000 claims abstract description 175
- 238000010276 construction Methods 0.000 claims abstract description 39
- 239000002689 soil Substances 0.000 claims abstract description 30
- 238000009412 basement excavation Methods 0.000 claims abstract description 17
- 238000013461 design Methods 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 10
- 239000004035 construction material Substances 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 9
- 239000011378 shotcrete Substances 0.000 claims description 7
- 238000005728 strengthening Methods 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000013213 extrapolation Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The present invention relates to Tunnels in Shallow Buried excavation technology field, discloses a kind of material for shallow-buried sector and transports system and Shallow Section earth's surface reinforcement means.The present invention includes the duct being arranged in the soil layer of shallow-buried sector, and transport steel pipe and steel pipe support；Duct tilts from inside to outside, towards the front of tunnel top bar face, and the lower end outlet in duct is excavated space with the top bar in tunnel and communicated, and the upper end outlet in duct communicates with earth's surface, and the upper end outlet in duct is higher than the design height of Shallow Section back-up coat；Transport steel pipe be through in duct, and the one end for transporting steel pipe pass through tunnel top bar face advance support system stretch to tunnel top bar excavate space in, the front of tunnel top bar face, transport steel pipe the other end stretching earth's surface；Steel pipe support is arranged in the top bar of tunnel excavation, and steel pipe support top is rigidly connected with transport steel pipe.Efficiency of construction of the present invention is high, and difficulty is low, without building earth's surface transport sidewalk.
Description
Technical field
The present invention relates to Tunnels in Shallow Buried excavation technology field, is transported more particularly to a kind of material for shallow-buried sector
System and Shallow Section earth's surface reinforcement means.
Background technology
Barrel Construction of Shallow-Buried Section is often met in tunnel in construction, and barrel Shallow Section geological conditions is poor, covering thickness
Degree is minimum, in tunnel excavation work progress, easily because soil layer shakes and caused by Shallow Section collapse, it is therefore desirable in tunnel excavation
The earth's surface of barrel Shallow Section is reinforced before to Shallow Section, to improve the stabilization of barrel overburden cover and surrounding rock structure,
Ensure construction safety.Conventional soil surface treatment mode is broadly divided into cut and cover method and cap excavation method, is processing mode outside hole, but this
Kind of construction method exist one it is more serious the problem of, earth's surface reinforce required for various construction equipments and filling material, all need
To be transported from earth's surface to Shallow Section.Because demand and the position of tunnel construction are, it is necessary to various multiple by high mountain, forest land, wetland etc.
The region of miscellaneous ground surface environment, it is larger to build transport sidewalk difficulty in this earth's surface, expropriation of land be present quantity is big, construction workload is big,
The problems such as construction risk is high, forest land vegetation deterioration is serious, low construction efficiency, especially length is longer, area is larger grows up
Tunnel, the processing mode transported with earth's surface outside this hole, difficulty are bigger.
The content of the invention
The present invention provides that a kind of efficiency of construction is high, and difficulty is low, is used for shallow-buried sector without build earth's surface transport sidewalk
Material transport system and Shallow Section earth's surface reinforcement means.
The technical problem of solution is：The earth's surface situation in constructing tunnel location is complicated, transports needed for Shallow Section strengthening construction
During construction material, build sidewalk workload is big, and expropriation of land quantity is big, and construction risk is high, and forest land vegetation deterioration is serious, efficiency of construction
It is low.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
The material that the present invention is used for shallow-buried sector transports system, including the duct being arranged in the soil layer of shallow-buried sector, with
And transport steel pipe and steel pipe support；
The duct tilts from inside to outside, towards the front of tunnel top bar face, the lower end outlet in duct and appearing on the stage for tunnel
Rank is excavated space and communicated, and the upper end outlet in duct communicates with earth's surface, and the upper end outlet in duct is higher than Shallow Section back-up coat
Design height；
The transport steel pipe is through in duct, and the one end for transporting steel pipe is passed through tunnel the advance support body of top bar face
The top bar that system stretches to tunnel is excavated in space, the rear of tunnel top bar face, and the other end for transporting steel pipe stretches out ground
Table；
The steel pipe support is arranged in the top bar of tunnel excavation, and steel pipe support top is rigidly connected with transport steel pipe.
The material that the present invention is used for shallow-buried sector transports system, and further, the angle of duct and horizontal plane is no more than
60 °, a diameter of 120-220mm in the duct, the external diameter of the transport steel pipe is smaller 40-60mm than channel diameter.
The material that the present invention is used for shallow-buried sector transports system, and further, the transport steel pipe stretches out the end of earth's surface
Head is higher 80-100cm than the design height of Shallow Section back-up coat.
The material that the present invention is used for shallow-buried sector transports system, further, between the transport steel pipe and duct
Fine earth or gravelly soil have been filled in gap.
The material that the present invention is used for shallow-buried sector transports system, further, slip rope, institute is provided with the transport steel pipe
Stating slip rope includes fixed steel wire rope and mobile steel wire rope, length direction arrangement of the fixed steel wire rope along transport steel pipe, both ends difference
The two ends of transport steel pipe are fixed on, are connected in the middle part of mobile steel wire rope by card of restricting with fixed steel wire rope, along the length of transport steel pipe
Direction arrangement is spent, the both ends open of transport steel pipe is stretched out at both ends respectively.
The material that the present invention is used for shallow-buried sector transports system, and further, the length of the mobile steel wire rope is more than
Transport length of steel pipe 2 times.
The Shallow Section earth's surface reinforcement means of the invention that system is transported using the above-mentioned material for shallow-buried sector, including with
Lower step：
Step 1: exploration：Field exploring is carried out to the Shallow Section region in tunnel according to construction drawing, determines that barrel face excavates
Mileage, supporting parameter, the penetration site and angle for transporting steel pipe；
Step 2: pre-reinforcement：Pre-reinforcement is carried out to the Shallow Section soil layer of tunnel tunnel face front, entered using long pipe shed advance support
The earth's surface on row Tunnel top is reinforced, and the reinforcing of soil layer around the duct in material transport system is carried out using grouting with small pipe；
Step 3: tunneling：Carry out tunnel excavation using three benching tunnelling methods or the interim inverted arch method of three steps, formed top bar, middle
Rank and three operating platforms of getting out of a predicament or an embarrassing situation；
Step 4: set up steel pipe support：Steel pipe support is set in top bar；
Step 5: transport steel pipe is set：Duct, and embedded transport steel pipe are set；
Step 6: Shallow Section earth's surface is reinforced：It is transferred to by transporting steel pipe by the construction equipment used in strengthening construction, material to be added
Solid Shallow Section, then carry out combined bolting and shotcrete and biased side set arch joint reinforcement.
Shallow Section earth's surface reinforcement means of the present invention, further, long pipe shed is arranged along tunnel bearing of trend in step 2, is adopted
With Ф 89 seamless steel pipe, length is not less than 5mm, and the ring spacing of long pipe shed is 30-50cm, outer limb ≯ 12 ° of long pipe shed；Institute
State ductule and be arranged on front of tunnel heading coating, circumferentially disposed along transport steel pipe, the spacing between ductule is not more than 40cm,
The extrapolation angle of ductule and transport steel pipe keeping parallelism, ductule are not less than 50cm, ductule with transport steel pipe center spacing
Interior slip casting is ratio of mud 0.5-1 cement mortar.
Shallow Section earth's surface reinforcement means of the present invention, further, step 5 set transport steel pipe, specifically include following step
Suddenly：
1. position：According to detail design, accurate surveying and locating is carried out, the biased side of barrel biased segment is selected, in the upper of tunnel
The bore position and angle in duct are determined in bench excavation space；
2. drill：Using top bar as operating platform, the drilling in duct is carried out using hidden hole drilling or hydraulic drilling equipment；
3. embedded transport steel pipe：Transport steel pipe is set in duct, using rig jacking, until hole is stretched out on the top of transport steel pipe
Road earth's surface outlet；
4. fixed transport steel pipe and steel pipe support：The afterbody of transport steel pipe by anchor ear or is weldingly fixed on steel pipe support；
5. seal：Fine earth or gravelly soil have been filled in gap between transport steel pipe and duct, it is real to ram packing, and by duct earth's surface
It is real that packing is rammed near exit position.
Shallow Section earth's surface reinforcement means of the present invention, further, combined bolting and shotcrete is combined with biased side set arch and added in step 6
Gu follow the steps below construction：
A) construction tool is transported：By construction tool by transporting steel pipe, Shallow Section to be reinforced is transferred to；
B) clear table：The region for treating the Shallow Section of reinforcing carries out clear table, removes vegetation and the loosened soil on original ground top layer；
C) construction material is transported：By construction material and concrete ejection pipe respectively by transporting steel pipe, it is transferred to be reinforced shallow
Bury section；
D) strengthening of foundation：Grouting rock bolt is set up, and hangs bar-mat reinforcement, then gunite concrete, basis of formation surface layer；
E) biased side is reinforced：Set concrete jacket to encircle on the basic surface layer of the biased side of Shallow Section and carry out consolidation process；
F) coating backfills：Coating is backfilled to Shallow Section, the planting soil of stripping is then spilt in cover surface paving, in soil layer
Grass-seed is sowed, carries out greening treatment.
The material that the present invention is used for shallow-buried sector transports system and Shallow Section earth's surface reinforcement means compared with prior art,
Have the advantages that：
The material transport architecture that the present invention is used for shallow-buried sector is simple, is easy to construct, easy to use, has opened tunnel and has opened
With the transport channel of earth's surface Shallow Section in hollowing out, Shallow Section earth's surface can be reinforced required construction equipment, material, instrument etc.
By delivering to ground in tunnel excavation space, without building extra transport sidewalk in earth's surface, green, economical and efficient, significantly
Reduce the workload of earth's surface strengthening construction, reduce difficulty of construction, improve working security, avoid to greatest extent not
Necessary repeatability construction, substantially increases efficiency of construction.
Shallow Section earth's surface reinforcement means of the present invention carries out shallow by the way of combined bolting and shotcrete covers arch joint reinforcement with biased side
Bury section earth's surface to reinforce, construction method is simple, easy to operate, and consolidation effect is good, can effectively avoid Shallow Section soil layer in tunnel excavation
During the landslide occurred, situations such as caving in.
System and Shallow Section earth's surface reinforcing side are transported to the material for shallow-buried sector of the present invention below in conjunction with the accompanying drawings
Method is described further.
Brief description of the drawings
Fig. 1 is structural representation of the present invention along the longitudinal section of tunnel bearing of trend；
Fig. 2 is structural representation of the present invention along tunnel profile；
Fig. 3 is the structural representation of slip rope；
Fig. 4 is the longitudinal plane structure schematic diagram of Shallow Section earth's surface ruggedized construction；
Fig. 5 is A-A cross-sectional views in Fig. 4.
Reference：
1- transports steel pipe；11- ducts；2- steel pipe supports；3- top bar faces；31- top bars excavate space；32- top bars；
4- advance support systems；5- ductules；6- slip ropes；61- fixes steel wire rope；62- moves steel wire rope；63- rope cards；7- base surfaces
Layer；8- concrete jackets encircle；81- set arch arch springings；82- locks pin steel pipe；9- coatings.
Embodiment
As depicted in figs. 1 and 2, the present invention is used for the material transport system of shallow-buried sector including being arranged on shallow-buried sector
Soil layer in duct 11, and for transporting the transport steel pipe 1 of construction material and the steel pipe support 2 of fixed transport steel pipe 1；
Duct 11 tilts from inside to outside, towards the front of tunnel top bar face 3, and duct 11 and the angle of horizontal plane are no more than
60 °, a diameter of 120-220mm in duct, the lower end outlet in duct 11 is excavated space 31 with the top bar in tunnel and communicated, duct 11
Upper end outlet communicated with earth's surface, and the upper end outlet in duct 11 be higher than Shallow Section back-up coat design height；
Transport steel pipe 1 is through in duct 11, and the one end for transporting steel pipe 1 is passed through tunnel the advance support of top bar face 3
The top bar that system 4 stretches to tunnel is excavated in space 31, the rear of tunnel top bar face 3, transports the other end of steel pipe 1
Stretch out earth's surface；The external diameter of transport steel pipe 1 is smaller 40-60mm than the diameter of duct 11, transports and is filled out in the gap between steel pipe 1 and duct 11
Fine earth or gravelly soil are built, the termination that transport steel pipe 1 stretches out earth's surface is higher 80-100cm than the design height of Shallow Section back-up coat, fortune
Defeated steel pipe 1 is the stainless steel tube that thickness is not less than 5mm；
Steel pipe support 2 is arranged in the top bar 32 of tunnel excavation, and the top of steel pipe support 2 is rigidly connected with transport steel pipe 1, passes through
Anchor ear is welded and fixed；Pull rope is provided with transport steel pipe 1, the two ends of transport steel pipe 1 are stretched out at pull rope both ends respectively.
Similar, as shown in figure 3, being provided with slip rope 6 in transport steel pipe 1, slip rope 6 includes fixed steel wire rope 61 and mobile steel wire
Rope 62, length direction of the fixed steel wire rope 61 along transport steel pipe 1 are arranged that both ends are separately fixed at the two ends of transport steel pipe 1, moved
The dynamic middle part of steel wire rope 62 is connected by card 63 of restricting with fixed steel wire rope 61, along the length direction arrangement of transport steel pipe 1, both ends difference
The both ends open of transport steel pipe 1 is stretched out, the length of mobile steel wire rope 62 is more than 2 times of the transport length of steel pipe 1.
The Shallow Section earth's surface reinforcement means of system is transported using above-mentioned material, specifically includes following steps：
Step 1: exploration：Field exploring is carried out to the Shallow Section region in tunnel according to construction drawing, coating sampling detection is contained
Water rate, compactness, determine that barrel face excavates mileage, supporting parameter, the penetration site and angle for transporting steel pipe 1；
Step 2: pre-reinforcement：Pre-reinforcement is carried out to the Shallow Section soil layer of tunnel tunnel face front, using long pipe shed advance support with
The mode that the slip casting of advanced tubule 5 is combined, the specific earth's surface that Tunnel top is carried out using long pipe shed advance support are reinforced, long tube
Canopy arranges that, using Ф 89 seamless steel pipe, length is not less than 5mm, and the ring spacing of long pipe shed is 30- along tunnel bearing of trend
50cm, outer limb ≯ 12 ° of long pipe shed；Adding for the surrounding soil layer of duct 11 in material transport system, is carried out using grouting with small pipe
Gu ductule 5 is arranged on front of tunnel heading coating, circumferentially disposed along transport steel pipe 1, the spacing between ductule 5 is not more than
40cm, extrapolation angle and the transport keeping parallelism of steel pipe 1 of ductule 5 avoid intersecting, ductule 5 and the transport center spacing of steel pipe 1
Not less than 50cm, ductule 5 is not less than 3.5mm hot rolled seamless steel tube using external diameter 40-50mm, thickness, the note in ductule 5
Slurry uses ratio of mud 0.5-1 cement mortar；
Step 3: tunneling：Carry out tunnel excavation using three benching tunnelling methods or the interim inverted arch method of three steps, formed top bar, middle
Rank and three operating platforms of getting out of a predicament or an embarrassing situation；The wherein interim inverted arch method of three higher steps of preferred security coefficient；
Step 4: set up steel pipe support：Steel pipe support 2 is set in top bar 32, as " the leading wall " and fortune for being drilled with duct 11
The fixed mount of the defeated afterbody of steel pipe 1；The welding of 2 preferred seamless steel pipe of steel pipe support is made；
Step 5: transport steel pipe is set：Duct 11, and embedded transport steel pipe 1 are set, specifically include following steps：
1. position：According to detail design, accurate surveying and locating is carried out, the biased side of barrel biased segment is selected, in the upper of tunnel
The bore position and angle in duct 11 are determined in bench excavation space 31；
2. drill：It is operating platform with top bar 32, the drilling in duct 11, aperture is carried out using hidden hole drilling or hydraulic drilling equipment
For 120-220m, duct 11 and the angle of horizontal plane are no more than 60 °；
3. embedded transport steel pipe：Transport steel pipe 1 is set in duct 11, using rig jacking, until the top of transport steel pipe 1 is stretched
Go out the earth's surface outlet in duct 11, it is ensured that the termination that transport steel pipe 1 stretches out earth's surface is higher 80- than the design height of Shallow Section back-up coat
100cm；
The structure of slip rope 6 is provided with transport steel pipe 1, preprocessing can be carried out, specifically include following steps：
A, a rope card 63 is fixed at the mobile middle part of steel wire rope 62；
B, rope card 63 is set on fixed steel wire rope 61；
C, fixed steel wire rope 61 is worn in transport steel pipe 1, the both ends of fixed steel wire rope 61 is separately fixed at transport steel pipe 1
Two ends；Length direction of the mobile steel wire rope 62 along transport steel pipe 1 arranges that the both ends open of transport steel pipe 1 is stretched out at both ends respectively,
Mobile steel wire rope 62 can slide along fixed steel wire rope 61 is relative；
4. fixed transport steel pipe and steel pipe support：The afterbody of transport steel pipe 1 by anchor ear or is weldingly fixed on steel pipe support 2；
5. seal：Fine earth or gravelly soil have been filled in gap between transport steel pipe 1 and duct 11, it is real to ram packing, and by duct
It is real that packing is rammed at 11 earth's surface near exit position；
Step 6: Shallow Section earth's surface is reinforced：As shown in Figure 4 and Figure 5, following steps are specifically included：
A) construction tool is transported：The one end of steel wire rope 62 is being moved into construction tool colligation, mobile steel wire rope is pullled from earth's surface one end
62 by construction tool by transporting steel pipe 1, be transferred to Shallow Section to be reinforced；
B) clear table：The region for treating the Shallow Section of reinforcing carries out clear table, removes vegetation and the loosened soil on original ground top layer；
C) construction material is transported：The one end of steel wire rope 62 is being moved into construction material colligation, mobile steel wire rope is pullled from earth's surface one end
62 by construction tool by transporting steel pipe 1, be transferred to Shallow Section to be reinforced；Then concrete ejection pipe is passed through into transport steel again
Pipe 1, delivers to ground；
D) strengthening of foundation：Grouting rock bolt is set up, and hangs bar-mat reinforcement, then sprays C20 concrete, thickness is not less than 10cm, shape
Into basic surface layer 7；
E) biased side is reinforced：Set concrete jacket to encircle 8 on the basic surface layer 7 of the biased side of Shallow Section and carry out consolidation process；It is mixed
I18 light steel frames are set in solidifying soil suite arch 8, the longitudinal pitch of light steel frame is not more than 1m；Set arch arch springing 81 sets 3 φ 42 to lock
Pin steel pipe 82, the long 6m of steel pipe, is welded and fixed with profile steel frame；The set arch arch springing 81 of both sides is formed using C20 concretings, is mixed
Solidifying soil suite arch 8 is formed using C30 concretings；
F) coating backfills：Coating 9 is backfilled to Shallow Section, cladding thickness is not less than 0.5m, and then paving is spilt on the surface of coating 9
The planting soil of stripping, grass-seed is sowed in soil layer, carry out greening treatment；
G) clear up：Construction tool, equipment and construction material are sent back to tunnel internal by transporting steel pipe 1.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (10)
1. the material for shallow-buried sector transports system, it is characterised in that：Including being arranged in the soil layer of shallow-buried sector
Duct（11）, and transport steel pipe（1）And steel pipe support（2）；
The duct（11）From inside to outside, towards tunnel top bar face（3）Front tilt, duct（11）Lower end outlet with
The top bar in tunnel excavates space（31）Communicate, duct（11）Upper end outlet communicated with earth's surface, and duct（11）Upper end
Design height of the outlet higher than Shallow Section back-up coat；
The transport steel pipe（1）It is through duct（11）In, and transport steel pipe（1）One end pass through tunnel top bar face
（3）Advance support system（4）The top bar for stretching to tunnel excavates space（31）Interior, tunnel top bar face（3）After
Side, transport steel pipe（1）The other end stretch out earth's surface；
The steel pipe support（2）It is arranged on the top bar of tunnel excavation（32）On, steel pipe support（2）Top and transport steel pipe（1）
It is rigidly connected.
2. the material according to claim 1 for shallow-buried sector transports system, it is characterised in that：The duct（11）
It is no more than 60 ° with the angle of horizontal plane, the duct（11）A diameter of 120-220mm, the transport steel pipe（1）External diameter ratio
The small 40-60mm of channel diameter.
3. the material according to claim 2 for shallow-buried sector transports system, it is characterised in that：The transport steel pipe
（1）The termination for stretching out earth's surface is higher 80-100cm than the design height of Shallow Section back-up coat.
4. the material according to claim 3 for shallow-buried sector transports system, it is characterised in that：The transport steel pipe
（1）With duct（11）Between gap in filled fine earth or gravelly soil.
5. the material according to claim 4 for shallow-buried sector transports system, it is characterised in that：The transport steel pipe
（1）It is interior to be provided with slip rope（6）, the slip rope（6）Including fixed steel wire rope（61）With mobile steel wire rope（62）, fixed steel wire rope（61）
Along transport steel pipe（1）Length direction arrangement, both ends are separately fixed at transport steel pipe（1）Two ends, mobile steel wire rope（62）
Blocked by restricting at middle part（63）With fixed steel wire rope（61）Connection, along transport steel pipe（1）Length direction arrangement, both ends are stretched out respectively
Transport steel pipe（1）Both ends open.
6. the material according to claim 5 for shallow-buried sector transports system, it is characterised in that：The mobile steel wire
Rope（62）Length be more than transport steel pipe（1）2 times of length.
7. usage right requires that the Shallow Section earth's surface of the material transport system for shallow-buried sector described in 1-6 any one adds
Solid method, it is characterised in that：Comprise the following steps：
Step 1: exploration：Field exploring is carried out to the Shallow Section region in tunnel according to construction drawing, determines that barrel face excavates
Mileage, supporting parameter, transport steel pipe（1）Penetration site and angle；
Step 2: pre-reinforcement：Pre-reinforcement is carried out to the Shallow Section soil layer of tunnel tunnel face front, entered using long pipe shed advance support
The earth's surface on row Tunnel top is reinforced, using ductule（5）Slip casting carries out the duct in material transport system（11）Surrounding soil layer
Reinforce；
Step 3: tunneling：Carry out tunnel excavation using three benching tunnelling methods or the interim inverted arch method of three steps, formed top bar, middle
Rank and three operating platforms of getting out of a predicament or an embarrassing situation；
Step 4: set up steel pipe support：In top bar（32）Upper setting steel pipe support（2）；
Step 5: transport steel pipe is set：Duct is set（11）, and embedded transport steel pipe（1）；
Step 6: Shallow Section earth's surface is reinforced：By transporting steel pipe（1）Construction equipment used in strengthening construction, material are transferred to
Shallow Section to be reinforced, then carry out combined bolting and shotcrete and biased side set arch joint reinforcement.
8. Shallow Section earth's surface reinforcement means according to claim 7, it is characterised in that：Long pipe shed prolongs along tunnel in step 2
Direction arrangement is stretched, using Ф 89 seamless steel pipe, length is not less than 5mm, and the ring spacing of long pipe shed is 30-50cm, long pipe shed
Outer limb ≯ 12 °；The ductule（5）Front of tunnel heading coating is arranged on, along transport steel pipe（1）It is circumferentially disposed, ductule
（5）Between spacing be not more than 40cm, ductule（5）Extrapolation angle with transport steel pipe（1）Keeping parallelism, ductule（5）With
Transport steel pipe（1）Center spacing is not less than 50cm, ductule（5）Interior slip casting is ratio of mud 0.5-1 cement mortar.
9. Shallow Section earth's surface reinforcement means according to claim 7, it is characterised in that：Step 5 sets transport steel pipe（1）,
Specifically include following steps：
1. position：According to detail design, accurate surveying and locating is carried out, the biased side of barrel biased segment is selected, in the upper of tunnel
Bench excavation space（31）Interior determination duct（11）Bore position and angle；
2. drill：With top bar（32）For operating platform, duct is carried out using hidden hole drilling or hydraulic drilling equipment（11）Drilling；
3. embedded transport steel pipe：In duct（11）It is interior that transport steel pipe is set（1）, using rig jacking, until transport steel pipe（1）'s
Duct is stretched out on top（11）Earth's surface outlet；
4. fixed transport steel pipe and steel pipe support：Transport steel pipe（1）Afterbody by anchor ear or be weldingly fixed on steel pipe support（2）
On；
5. seal：Transport steel pipe（1）With duct（11）Between gap in filled fine earth or gravelly soil, it is real to ram packing, and will
Duct（11）To ram packing real at earth's surface near exit position.
10. Shallow Section earth's surface reinforcement means according to claim 7, it is characterised in that：In step 6 combined bolting and shotcrete with partially
Side set arch joint reinforcement is pressed, follows the steps below construction：
A) construction tool is transported：By construction tool by transporting steel pipe（1）, it is transferred to Shallow Section to be reinforced；
B) clear table：The region for treating the Shallow Section of reinforcing carries out clear table, removes vegetation and the loosened soil on original ground top layer；
C) construction material is transported：By construction material and concrete ejection pipe respectively by transporting steel pipe（1）, it is transferred to be reinforced
Shallow Section；
D) strengthening of foundation：Grouting rock bolt is set up, and hangs bar-mat reinforcement, then gunite concrete, basis of formation surface layer（7）；
E) biased side is reinforced：In the basic surface layer of the biased side of Shallow Section（7）Upper setting concrete jacket encircles（8）Carry out at reinforcing
Reason；
F) coating backfills：Coating is backfilled to Shallow Section（9）, then in coating（9）Surface spreads the planting soil for spilling stripping,
Grass-seed is sowed in soil layer, carries out greening treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084147.3A CN107575256A (en) | 2017-11-07 | 2017-11-07 | Material for shallow-buried sector transports system and Shallow Section earth's surface reinforcement means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084147.3A CN107575256A (en) | 2017-11-07 | 2017-11-07 | Material for shallow-buried sector transports system and Shallow Section earth's surface reinforcement means |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110486053A (en) * | 2019-09-05 | 2019-11-22 | 贵阳建筑勘察设计有限公司 | A kind of urban track traffic shallow tunnel fault of construction treatment construction method |
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