CN108150190A - Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and construction method - Google Patents
Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and construction method Download PDFInfo
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- CN108150190A CN108150190A CN201810015853.0A CN201810015853A CN108150190A CN 108150190 A CN108150190 A CN 108150190A CN 201810015853 A CN201810015853 A CN 201810015853A CN 108150190 A CN108150190 A CN 108150190A
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- 239000011435 rock Substances 0.000 title claims abstract description 50
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 34
- 230000008878 coupling Effects 0.000 claims abstract description 27
- 238000010168 coupling process Methods 0.000 claims abstract description 27
- 238000005859 coupling reaction Methods 0.000 claims abstract description 27
- 238000009412 basement excavation Methods 0.000 claims abstract description 19
- 230000005641 tunneling Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 135
- 239000010959 steel Substances 0.000 claims description 135
- 239000002002 slurry Substances 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 12
- 238000007569 slipcasting Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 229920002472 Starch Polymers 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and construction method, belongs to Tunnel Engineering field.Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and includes friction pile, grouting and reinforcing coupling beam, cant beam and mini pile；Friction pile is equally spaced along tunnel excavation profile both sides along wiring direction；Grouting and reinforcing coupling beam sequentially passes through shallow embedding side friction pile and massif, and friction pile of the both ends respectively with tunnel both sides is connected；Cant beam is set along slope surface, and both ends are connected respectively with buried side and shallow embedding side antiskid stake top；Tunneling in the region surrounded in friction pile and grouting and reinforcing coupling beam applies mini pile and reinforces tunnel bottom, applies lining cutting.The present invention forms safeguard structure before tunnel excavation, can significantly improve the stability on tunnel side hillside, and balanced bias power effectively prevents sliding and vault slump of the Unevenly-pressured shallow tunnel in digging process.
Description
Technical field
The present invention relates to Unevenly-pressured shallow tunnel rock crusher sections to excavate safeguard structure, belongs to Tunnel Engineering technical field.
Background technology
With the high speed development of economic construction of China, traffic infrastructure input continues to increase, particularly highway, height
After fast railway enters mountain area, Tunnel Engineering is largely built.These tunnels are most of along the river, are close to mountain wiring, often exist enclose along the line
The unfavorable operating modes such as rock crushes, landform biases or even the possibility that there is landslide.Bias can cause the uneven stress in tunnel, gently then
Tunnel arch is caused to deform, it is heavy then destroy tunnel structure；Especially rock crushing, the serious Shallow Section of weathering, arching energy force difference,
The above rock geological disasters such as easily cause to come down after by excavation disturbance, cave in are occurred, tired so as to cause tunnel excavation driving
Difficulty influences tunnel normal construction and operation, threatens people life property safety.How to be ensured using more effective safeguard structure
Constructing tunnel operation security is the frequent problems faced of Unevenly-pressured shallow tunnel rock crusher section construction.
Safeguard procedures in existing Unevenly-pressured shallow tunnel rock crusher section construction mainly have：Increase lining thickness, add
Anchor pole reduces the deformation of lining cutting and the sliding of hole body in digging process with Guan Peng, increasing steel arch-shelf rigidity；It is added in shallow embedding side
Gravity Retaining Wall is native in shallow embedding side backfill back-pressure, passes through Gravity Retaining Wall or back-pressure soil body balance portion biasing force.These
Method is although simple for process, but relatively low for the supporting intensity for crushing loose Rock And Soil, is not directed to tunnel perimeter Rock And Soil
Reinforcing does not reinforce unstable massif fundamentally, only increases tunnel structure rigidity in itself or local stiffening
Massif resists biasing force, it is difficult to meet the Shallow Tunnel Construction Operational requirements under the extremely unfavorable operating modes such as bias, rock crusher.Cause
This, being badly in need of one kind reinforcement and strengthening tunnel perimeter country rock body and can be reduced or eliminated the novel protective structure of tunnel biasing force,
To ensure tunnel safety, high efficient driving.
Invention content
The object of the present invention is to provide a kind of Unevenly-pressured shallow tunnel rock crusher sections to excavate safeguard structure and construction method.
The present invention is that Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and construction method, Unevenly-pressured shallow tunnel country rock
Reduction stage excavates safeguard structure, including friction pile 3, grouting and reinforcing coupling beam 4, cant beam 9 and mini pile 12；Friction pile 3 is set by inner wall
It puts and I-steel 5 and casting concrete composition is inserted into the rectangular steel pipe 6 of grouting nozzle 8, connected up along 2 outline excavation both sides of tunnel edge
Direction is equally spaced；Grouting and reinforcing coupling beam 4 is the reinforcing body that casting concrete is formed in round steel pipe 7, is sequentially passed through shallow
Side friction pile 3 and massif 1 are buried, is finally stretched into buried side friction pile 3；Cant beam 9 is cast-in-place concrete structure, is set along slope surface,
Both ends are connected respectively with buried side and 3 stake top of shallow embedding side friction pile；In the region surrounded in friction pile 3 and grouting and reinforcing coupling beam 4
Tunneling 2 applies mini pile 12 and reinforces tunnel bottom, applies lining cutting.
Unevenly-pressured shallow tunnel rock crusher section excavates the construction method of safeguard structure, and construction procedure is：
（1）Prefabricated components：Be prefabricated in the factory rectangular steel pipe 6, round steel pipe 7, circular cover 11 and plugging plate 13；Rectangular steel pipe 6
The elongated grouting nozzle 8 for being welded with blossom type arrangement of inner wall, in the circular hole that 6 short side two side of rectangular steel pipe opens up；In round steel pipe 7
The elongated grouting nozzle 8 for being welded with blossom type arrangement of wall；The diameter of circular cover 11 is equal to the diameter of round steel pipe 7, center weldering
Connect grouting nozzle 8；Plugging plate 13 is circular steel plate；
（2）The stake side solid layer 10 of slurry is constructed：Rectangle stake holes is excavated along wiring direction in 2 outline excavation both sides of tunnel, is inserted when excavating
Enter rectangular steel pipe 6, until stake end stretch enters in the stabilization rock stratum below slide surface, pass through the note being arranged on 6 inner wall of rectangular steel pipe
Mouth 8 is starched to 6 outside pressure slip casting of rectangular steel pipe, the solid layer 10 of slurry is formed in 6 outside of rectangular steel pipe；
（3）Construction platform is excavated：In shallow embedding side, Rock And Soil is excavated in 3 outside of friction pile, and a construction platform is formed on the outside of stake, is applied
The absolute altitude of work platform is less than 34 ~ 5m of stake top absolute altitude of shallow embedding side friction pile；
（4）Grouting and reinforcing coupling beam 4 is constructed：Circular hole is reserved along shallow embedding side rectangular steel pipe 6 to the horizontal stake holes of 1 inner excavation of massif,
Round steel pipe 7 is inserted into when excavating, round steel pipe 7 sequentially passes through shallow embedding side rectangular steel pipe 6, massif 1, and stretches into deep in same section
It buries in side rectangular steel pipe 6, ensures that 0.5 ~ 1.0m in rectangular steel pipe 6 is inserted at 7 both ends of round steel pipe respectively；By being arranged on circular steel
The grouting nozzle 8 of 7 inner wall of pipe forms the solid layer 10 of slurry to 7 outside pressure slip casting of round steel pipe, and circular lid is welded at 7 both ends of round steel pipe
Plate 11 injects concrete into steel pipe by the grouting nozzle 8 being arranged in circular cover 11 and forms grouting and reinforcing coupling beam 4；
（5）Friction pile 3 pours：It is welded at the circular hole in 6 outside of shallow embedding side rectangular steel pipe with plugging plate 13 and blocks rectangular steel pipe 6,
I-steel 5 is inserted into rectangular steel pipe 6,5 edge of a wing of I-steel is apart from rectangular steel pipe 6 far from 2 20 ~ 30cm of side of tunnel, web and tunnel
It moves towards vertical and is overlapped with 6 center line of rectangular steel pipe in road 2；Then casting concrete forms friction pile 3, stake in rectangular steel pipe 6
Top mark height is above ground level；
（6）Cant beam 9 applies：Slope surface is flattened, along slope surface formwork and assembling reinforcement, casting concrete forms cant beam 9；
（7）Tunnel excavation is constructed：Treat that the friction pile 3 of all sections and grouting and reinforcing coupling beam 4 apply and complete and meet design strength
After it is required that, the tunneling 2 in the closed area of friction pile 3 and the formation of grouting and reinforcing coupling beam 4；
（8）Mini pile 12 and lining construction：High-pressure rotary spraying method is used to form mini pile 12 in constructing tunnel in tunneling, it is complete
After the construction that safeguard structure is excavated into the section shallow unsymmetrial loading tunnel rock crusher section, lining cutting is applied；
（9）According to step（2）~ step（8）Construct next section Unevenly-pressured shallow tunnel rock crusher section excavate safeguard structure.
Beneficial effects of the present invention：（1）Tunnel trunk both sides set friction pile, and friction pile is mounted in good ground, put down
Biasing force caused by the landform that weighed improves the stability of massif side side slope；（2）By grouting nozzle slip casing by pressure, in antiskid
Form slurry solid layer stake stake week, that is, play the role of with the common antiskid of friction pile, also improve the physical force of fragmented rock body around
Property is learned, the globality that supporting construction periphery crushes Rock And Soil is effectively enhanced, reduces the lateral pressure that supporting construction is born；
（3）Grouting and reinforcing coupling beam and cant beam increase the globality of tunnel both sides friction pile, help to enhance the steady of vault breaking surrounding rock
It is qualitative, vault slump occurs when can prevent from excavating；（4）Rectangular steel pipe and the round steel pipe retaining wall during pore digging act on,
There is template action again in the casting concrete stage, I-steel is inserted into rectangular steel pipe and round steel pipe synergistic effect constitutes entirely
The skeleton of safeguard structure；（5）Mini pile is set at tunnel bottom, improves the bearing capacity of tunnel foundation.
Description of the drawings
Fig. 1 is the A-A of safeguard structure in Fig. 2 to sectional view；Fig. 2 is the elevation of safeguard structure；Fig. 3 for rectangular steel pipe with
I-steel relative position schematic diagram；Fig. 4 is round steel pipe schematic diagram.Reference numeral and correspondence are entitled：Massif 1, resists tunnel 2
The solid layer 10 of sliding pile 3, grouting and reinforcing coupling beam 4, I-steel 5, rectangular steel pipe 6, round steel pipe 7, grouting nozzle 8, cant beam 9, slurry, circular lid
Plate 11, mini pile 12, plugging plate 13.
Specific embodiment
The present invention is further described for several specific examples below in conjunction with the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be only limitted to this example.All equivalent replacements made in the principle of the invention, modification belong to the present invention after the present invention is read
Protection domain.
The present invention operation principle be：（1）Antiskid principle：The solid layer of friction pile and slurry, which plays, to be resisted side slope sliding force and adds
Gu the effect of periphery Rock And Soil；The power that grouting and reinforcing coupling beam and cant beam realize buried side friction pile is transmitted to the antiskid of shallow embedding side
Stake, and strengthen the Rock And Soil at the top of tunnel excavation profile；Mini pile strengthens the broken Rock And Soil at tunnel bottom, improves ground and holds
Carry power；Each component collective effect forms relatively stable tunnel excavation region, ensures the safety of constructing tunnel.（2）Initial lining cutting
Principle：By grouting nozzle slip casting around friction pile and grouting and reinforcing coupling beam, the solid layer of slurry is formd around tunnel excavation profile,
Play the role of initial lining cutting, improve the stability of breaking surrounding rock.（3）The grouting and reinforcing principle of broken Rock And Soil：Pass through
Grouting nozzle slip casing by pressure into massif in the grouting nozzle and round steel pipe of rectangular steel pipe inner wall connects in friction pile and grouting and reinforcing
The solid layer of slurry is formed around beam, the globality that Tunnel Design section periphery crushes Rock And Soil is effectively enhanced, is obviously improved tunnel and opens
Dig stability and the safety of section.（4）Retaining wall principle：When excavating friction pile stake holes, rectangular steel pipe is inserted into when excavating, is played
Retaining wall effect, effectively prevents loose rock blocks and falls.
As shown in Fig. 1 ~ Fig. 4, Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure, including friction pile 3, grouting and reinforcing
Coupling beam 4, cant beam 9 and mini pile 12；Friction pile 3 is inserted into I-steel 5 in the rectangular steel pipe 6 by inner wall setting grouting nozzle 8 and pours
Concrete is formed, and is equally spaced along 2 outline excavation both sides of tunnel along wiring direction；Grouting and reinforcing coupling beam 4 is round steel pipe 7
The reinforcing body that interior casting concrete is formed, sequentially passes through shallow embedding side friction pile 3 and massif 1, both ends respectively with 2 both sides of tunnel
Friction pile 3 is connected；Cant beam 9 be cast-in-place concrete structure, set along slope surface, both ends respectively with buried side and shallow embedding side friction pile 3
Stake top is connected；Tunneling 2 in the region surrounded in friction pile 3 and grouting and reinforcing coupling beam 4 applies mini pile 12 and reinforces tunnel bottom,
Apply lining cutting.
As shown in Fig. 1 ~ Fig. 3, the elongated grouting nozzle 8 for being welded with blossom type arrangement of 6 inner wall of rectangular steel pipe used in friction pile 3,
Rectangular steel pipe 6 also opens up circular hole perpendicular to the side wall of 2 wiring direction of tunnel, and circular hole is located at below 3 stake top of shallow embedding side friction pile, applies
More than work platform, the circular hole in same section on buried rectangular steel pipe 6 is located at same water with the circular hole on shallow embedding side rectangular steel pipe 6
In plane.
As shown in Figure 1, Figure 3,5 model I56a ~ I63c of I-steel, the edge of a wing is apart from rectangular steel pipe 6 far from 2 side of tunnel
20 ~ 30cm, web move towards vertical with tunnel 2 and are overlapped with 6 center line of rectangular steel pipe.
As Figure 1 and Figure 4,7 outer diameter of round steel pipe is with opening up that Circularhole diameter is identical, and both ends are welded on rectangular steel pipe 6
Circular cover 11, the elongated grouting nozzle 8 for being welded with blossom type arrangement of inner wall.
As shown in Figure 3, Figure 4, grouting nozzle 8 is arc-shaped pipe, and circular arc internal diameter is 10 ~ 20cm, a diameter of 2 ~ 3cm of pipe.
As shown in Figure 1 and Figure 2,9 deck-molding of cant beam is equal to the height that friction pile 3 exceeds slope surface, wide equal with 3 width of friction pile.
As shown in figure 4,11 diameter of circular cover is equal to the diameter of round steel pipe 7, center weld has grouting nozzle 8.
Unevenly-pressured shallow tunnel rock crusher section excavates the construction method of safeguard structure, and construction procedure is：
（1）Prefabricated components：Be prefabricated in the factory rectangular steel pipe 6, round steel pipe 7, circular cover 11 and plugging plate 13；Rectangular steel pipe 6
A length of 1.5 ~ the 2m in cross section, wide 1 ~ 1.5m, the elongated grouting nozzle 8 for being welded with blossom type arrangement of inner wall, in 6 short side two of rectangular steel pipe
Side wall opens up the circular hole of 0.6 ~ 1m, and circular hole is located at below 3 stake top of shallow embedding side friction pile at 3 ~ 4m；7 outer diameter of round steel pipe is equal to square
The diameter of circular hole, the elongated grouting nozzle 8 for being welded with blossom type arrangement of inner wall are opened up on shape steel pipe 6；Diameter of circular cover 11 etc.
In the diameter of round steel pipe 7, center weld grouting nozzle 8；Plugging plate 13 is the circular steel plate of a diameter of 1 ~ 1.2m；
（2）The stake side solid layer 10 of slurry is constructed：At 2 ~ 3 meters of 2 outline excavation both sides of tunnel, rectangle stake holes, side are excavated along wiring direction
It excavates side and is inserted into rectangular steel pipe 6, until stake end stretch enters in the stabilization rock stratum below slide surface, by being arranged in rectangular steel pipe 6
Grouting nozzle 8 on wall forms the solid layer 10 of slurry to 6 outside pressure slip casting of rectangular steel pipe in 6 outside of rectangular steel pipe；
（3）Construction platform is excavated：In shallow embedding side, Rock And Soil is excavated in 3 outside of friction pile, and a construction platform is formed on the outside of stake, is applied
The absolute altitude of work platform is less than 34 ~ 5m of stake top absolute altitude of shallow embedding side friction pile；
（4）Grouting and reinforcing coupling beam 4 is constructed：Circular hole is reserved along shallow embedding side rectangular steel pipe 6 to the horizontal stake holes of 1 inner excavation of massif,
Round steel pipe 7 is inserted into when excavating, round steel pipe 7 sequentially passes through shallow embedding side rectangular steel pipe 6, massif 1, and stretches into deep in same section
It buries in side rectangular steel pipe 6, ensures that 0.5 ~ 1.0m in rectangular steel pipe 6 is inserted at 7 both ends of round steel pipe respectively；By being arranged on circular steel
The grouting nozzle 8 of 7 inner wall of pipe forms the solid layer 10 of slurry to 7 outside pressure slip casting of round steel pipe, and circular lid is welded at 7 both ends of round steel pipe
Plate 11 injects concrete into steel pipe by the grouting nozzle 8 being arranged in circular cover 11 and forms grouting and reinforcing coupling beam 4；
（5）Friction pile 3 pours：It is welded at the circular hole in 6 outside of shallow embedding side rectangular steel pipe and sealed with the plugging plate 13 of 1 ~ 1.2m of diameter
Stifled rectangular steel pipe 6, is inserted into I-steel 5 in rectangular steel pipe 6,5 edge of a wing of I-steel apart from rectangular steel pipe 6 far from 2 side 20 of tunnel ~
30cm, web move towards vertical with tunnel 2 and are overlapped with 6 center line of rectangular steel pipe；Then the casting concrete shape in rectangular steel pipe 6
Into friction pile 3, stake top absolute altitude 0.5 ~ 1m above ground level；
（6）Cant beam 9 applies：Slope surface is flattened, along slope surface formwork and assembling reinforcement, casting concrete forms cant beam 9；
（7）Tunnel excavation is constructed：Treat that the friction pile 3 of all sections and grouting and reinforcing coupling beam 4 apply and complete and meet design strength
After it is required that, the tunneling 2 in the closed area of friction pile 3 and the formation of grouting and reinforcing coupling beam 4；
（8）Mini pile 12 and lining construction：High-pressure rotary spraying method is used to form mini pile 12 in constructing tunnel in tunneling, it is complete
After the construction that safeguard structure is excavated into the section shallow unsymmetrial loading tunnel rock crusher section, lining cutting is applied；
（9）According to step（2）~ step（8）Construct next section Unevenly-pressured shallow tunnel rock crusher section excavate safeguard structure.
Claims (8)
1. Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure, including friction pile（3）, grouting and reinforcing coupling beam（4）, cant beam
（9）And mini pile（12）, it is characterised in that friction pile（3）Grouting nozzle is set by inner wall（8）Rectangular steel pipe（6）Interior insertion I-shaped
Steel（5）And casting concrete is formed, along tunnel（2）Outline excavation both sides are equally spaced along wiring direction；Grouting and reinforcing connects
Beam（4）It is round steel pipe（7）The reinforcing body that interior casting concrete is formed, sequentially passes through shallow embedding side friction pile（3）And massif
（1）, finally stretch into buried side friction pile（3）It is interior；Cant beam（9）For cast-in-place concrete structure, set along slope surface, both ends respectively with depth
Bury side and shallow embedding side friction pile（3）Stake top is connected；In friction pile（3）With grouting and reinforcing coupling beam（4）Tunnel is excavated in the region surrounded
Road（2）, apply mini pile（12）Tunnel bottom is reinforced, applies lining cutting.
2. Unevenly-pressured shallow tunnel rock crusher section according to claim 1 excavates safeguard structure, it is characterised in that：It is described anti-
Sliding pile（3）Rectangular steel pipe used（6）The elongated grouting nozzle for being welded with blossom type arrangement of inner wall（8）, rectangular steel pipe（6）Perpendicular to tunnel
Road（2）The side wall of wiring direction also opens up circular hole, and circular hole is located at shallow embedding side friction pile（3）Below stake top, more than construction platform, together
Buried rectangular steel pipe in one section（6）On circular hole and shallow embedding side rectangular steel pipe（6）On circular hole be located in the same horizontal plane.
3. Unevenly-pressured shallow tunnel rock crusher section according to claim 1 excavates safeguard structure, it is characterised in that：The work
Word steel（5）Model I56a ~ I63c, the edge of a wing is apart from rectangular steel pipe（6）Far from tunnel（2）20 ~ 30cm of side, web and tunnel
（2）Move towards vertical and and rectangular steel pipe（6）Center line overlaps.
4. Unevenly-pressured shallow tunnel rock crusher section according to claim 1 excavates safeguard structure, it is characterised in that：The circle
Shape steel pipe（7）Outer diameter and rectangular steel pipe（6）On open up that Circularhole diameter is identical, and both ends are welded with circular cover（11）, inner wall leads to
The long grouting nozzle for being welded with blossom type arrangement（8）.
5. Unevenly-pressured shallow tunnel rock crusher section according to claim 1 excavates safeguard structure, it is characterised in that：The note
Starch mouth（8）For arc-shaped pipe, circular arc internal diameter is 10 ~ 20cm, a diameter of 2 ~ 3cm of pipe.
6. Unevenly-pressured shallow tunnel rock crusher section according to claim 1 excavates safeguard structure, it is characterised in that：It is described oblique
Beam（9）Deck-molding is equal to friction pile（3）Beyond the height of slope surface, wide and friction pile（3）Width is equal.
7. Unevenly-pressured shallow tunnel rock crusher section according to claim 1 excavates safeguard structure, it is characterised in that：The circle
Shape cover board（11）Diameter is equal to round steel pipe（7）Diameter, center weld has grouting nozzle（8）.
8. Unevenly-pressured shallow tunnel rock crusher section excavates the construction method of safeguard structure, which is characterized in that its construction procedure is：
（1）Prefabricated components：Be prefabricated in the factory rectangular steel pipe（6）, round steel pipe（7）, circular cover（11）And plugging plate（13）；Square
Shape steel pipe（6）The elongated grouting nozzle for being welded with blossom type arrangement of inner wall（8）, in rectangular steel pipe（6）The circle that short side two side opens up
Hole；Round steel pipe（7）The elongated grouting nozzle for being welded with blossom type arrangement of inner wall（8）；Circular cover（11）Diameter be equal to circle
Steel pipe（7）Diameter, center weld grouting nozzle（8）；Plugging plate（13）It is circular steel plate；
（2）The solid layer of stake side slurry（10）Construction：In tunnel（2）Rectangle stake holes is excavated in outline excavation both sides along wiring direction, and side is excavated
Rectangular steel pipe is inserted on side（6）, until stake end stretch enters in the stabilization rock stratum below slide surface, by being arranged on rectangular steel pipe（6）It is interior
Grouting nozzle on wall（8）To rectangular steel pipe（6）Outside pressure slip casting, in rectangular steel pipe（6）Outside forms the solid layer of slurry（10）；
（3）Construction platform is excavated：In shallow embedding side friction pile（3）Rock And Soil is excavated in outside, and a construction platform is formed on the outside of stake,
The absolute altitude of construction platform is less than shallow embedding side friction pile（3）4 ~ 5m of stake top absolute altitude；
（4）Grouting and reinforcing coupling beam（4）Construction：Along shallow embedding side rectangular steel pipe（6）Upper circular hole of reserving is to massif（1）Inner excavation is horizontal
Stake holes is inserted into round steel pipe when excavating（7）, round steel pipe（7）Sequentially pass through shallow embedding side rectangular steel pipe（6）, massif（1）, and
Stretch into buried side rectangular steel pipe in same section（6）It is interior, ensure round steel pipe（7）Rectangular steel pipe is inserted at both ends respectively（6）Interior 0.5 ~
1.0m；By being arranged on round steel pipe（7）The grouting nozzle of inner wall（8）To round steel pipe（7）Outside pressure slip casting forms the solid layer of slurry
（10）, in round steel pipe（7）Weld circular cover in both ends（11）, by being arranged on circular cover（11）On grouting nozzle（8）To
Injection concrete forms grouting and reinforcing coupling beam in steel pipe（4）；
（5）Friction pile（3）It pours：Use plugging plate（13）It is welded on shallow embedding side rectangular steel pipe（6）Rectangle is blocked at the circular hole in outside
Steel pipe（6）, rectangular steel pipe（6）Interior insertion I-steel（5）, I-steel（5）The edge of a wing is apart from rectangular steel pipe（6）Far from tunnel（2）One
20 ~ 30cm of side, web and tunnel（2）Move towards vertical and and rectangular steel pipe（6）Center line overlaps；Then in rectangular steel pipe（6）It is interior
Casting concrete forms friction pile（3）, stake top absolute altitude is above ground level；
（6）Cant beam（9）It applies：Slope surface is flattened, along slope surface formwork and assembling reinforcement, casting concrete forms cant beam（9）；
（7）Tunnel excavation is constructed：Treat the friction pile of all sections（3）With grouting and reinforcing coupling beam（4）It applies completion and meets design
After intensity requirement, in friction pile（3）With grouting and reinforcing coupling beam（4）Tunneling in the closed area of formation（2）；
（8）Mini pile（12）And lining construction：High-pressure rotary spraying method is used to form mini pile in constructing tunnel in tunneling
（12）, after completing the construction that the section shallow unsymmetrial loading tunnel rock crusher section excavates safeguard structure, apply lining cutting；
（9）According to step（2）~ step（8）Construct next section Unevenly-pressured shallow tunnel rock crusher section excavate safeguard structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015853.0A CN108150190B (en) | 2018-01-08 | 2018-01-08 | Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015853.0A CN108150190B (en) | 2018-01-08 | 2018-01-08 | Unevenly-pressured shallow tunnel rock crusher section excavates safeguard structure and construction method |
Publications (2)
| Publication Number | Publication Date |
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| CN108150190A true CN108150190A (en) | 2018-06-12 |
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| CN109296385A (en) * | 2018-10-23 | 2019-02-01 | 杭州市市政工程集团有限公司 | A kind of reinforcement means of the large span mountain tunnel hole top soil body |
| CN109811773A (en) * | 2019-03-01 | 2019-05-28 | 中铁十九局集团第五工程有限公司 | A kind of unsymmetrial loading tunnel hole excavate safeguard structure and its construction method |
| CN110043271A (en) * | 2019-05-21 | 2019-07-23 | 福建工程学院 | A kind of hole Shallow-buried section spaces union supporting construction and its construction method |
| CN110258536A (en) * | 2019-06-19 | 2019-09-20 | 山东省地质矿产勘查开发局八0一水文地质工程地质大队(山东省地矿工程勘察院) | Opposite-pulling anchor cable structure for reducing bias load and construction method |
| CN114320405A (en) * | 2022-01-06 | 2022-04-12 | 重庆交通大学 | Tunnel ultra-shallow buried broken surrounding rock artificial arching support system and method |
| CN115478565A (en) * | 2022-10-11 | 2022-12-16 | 中铁四局集团有限公司 | Excavation construction process for completely weathered V-grade rock shallow tunnel |
| CN117052421A (en) * | 2023-10-13 | 2023-11-14 | 湖南省通盛工程有限公司 | Tunnel portal supporting structure in deep slippage and large bias state and construction method |
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| CN110043271A (en) * | 2019-05-21 | 2019-07-23 | 福建工程学院 | A kind of hole Shallow-buried section spaces union supporting construction and its construction method |
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| CN114320405A (en) * | 2022-01-06 | 2022-04-12 | 重庆交通大学 | Tunnel ultra-shallow buried broken surrounding rock artificial arching support system and method |
| CN114320405B (en) * | 2022-01-06 | 2024-05-14 | 重庆交通大学 | Tunnel ultra-shallow buried broken surrounding rock artificial arching supporting system and method |
| CN115478565A (en) * | 2022-10-11 | 2022-12-16 | 中铁四局集团有限公司 | Excavation construction process for completely weathered V-grade rock shallow tunnel |
| CN115478565B (en) * | 2022-10-11 | 2024-01-23 | 中铁四局集团有限公司 | Excavation construction process for fully weathered V-level rock shallow tunnel |
| CN117052421A (en) * | 2023-10-13 | 2023-11-14 | 湖南省通盛工程有限公司 | Tunnel portal supporting structure in deep slippage and large bias state and construction method |
| CN117052421B (en) * | 2023-10-13 | 2024-01-09 | 湖南省通盛工程有限公司 | Tunnel portal supporting structure in deep slippage and large bias state and construction method |
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