CN204357438U - A kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section - Google Patents
A kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section Download PDFInfo
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- CN204357438U CN204357438U CN201420845742.XU CN201420845742U CN204357438U CN 204357438 U CN204357438 U CN 204357438U CN 201420845742 U CN201420845742 U CN 201420845742U CN 204357438 U CN204357438 U CN 204357438U
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- changeover portion
- vertical shaft
- foundation ditch
- section
- shaft changeover
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Abstract
The utility model discloses a kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section, foundation ditch section, vertical shaft changeover portion are concordant with tunnel excavation inducer top, the all downward open cuts from top of foundation ditch section and vertical shaft changeover portion, on the cross section that vertical shaft changeover portion and tunnel excavation inducer connect, excavation has reserved tunnel hole; The vertical shaft changeover portion degree of depth downward from top is greater than the degree of depth of foundation ditch section, and the width that described vertical shaft changeover portion is vertical with tunnel direct of travel is greater than the width of foundation ditch section; On the cross section that described vertical shaft changeover portion is connected with foundation ditch section, the additional part of width is inner termination inner corner trim near the side of vertical shaft changeover portion, and on the cross section that vertical shaft changeover portion is connected with foundation ditch section, the inner termination inner corner trim place of the additional part of the degree of depth is reinforced by rotary churning pile.In work progress, utilize vertical shaft changeover portion to form an entirety foundation ditch section and tunnel excavation inducer, improve tunnel entrance place soil layer construction, reduce the complexity of tunnel excavation inducer excavation.
Description
Technical field
The utility model belongs to field of road, relates to constructing tunnel, is specifically related to a kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section.
Background technology
Along with the quickening of urbanization paces, urban highway traffic congested problem is further serious, adopts Under-cross tunnel to carry out road traffic transformation more and more welcome in urban district.In city tunnel engineering, in tunnel, road surface elevation is low compared with outside, needs to adopt deep pit digging in the urban district that building stands in great numbers, under the place of wearing apply and secretly bury.At present, it is U-shaped open frame reinforced concrete structure that deep-foundation pit engineering adopts more, adopts box closure frame reinforced concrete structure tunnel structure in the secretly section of burying.
When Under-cross tunnel passes through larger massif, Under-cross tunnel need adopt hidden construction process to excavate with cost-saving and reduction difficulty of construction.Because urban land resource is nervous, general deep foundation ditch section is designed to road two-wire form, and tunneling section is designed to single cavity form.Changeover portion place road uplink and downlink tunnel portal standoff distance is comparatively near, needs to carry out the construction of small-clear-distance tunnel section.In general work progress, deep foundation ditch there are differences from tunnel structure and construction method different, add the difficulty of construction of changeover portion, easily occur at changeover portion place being connected the problem of irregularity, and easily occur that unstability such as to be caved at the problem in tunneling section import department.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model is, a kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section is provided, is intended to reduce changeover portion place difficulty of construction and save construction cost, the problem that solution joining place irregularity and tunneling section import department unstability are caved in.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
An excavation structure for open trench tunnel deep foundation ditch transition tunneling section, comprise foundation ditch section, described excavation structure also comprises tunnel excavation inducer, is provided with the vertical shaft changeover portion connecting foundation ditch section and tunnel excavation inducer between foundation ditch section and tunnel excavation inducer;
Described foundation ditch section, vertical shaft changeover portion are concordant with tunnel excavation inducer top, the all downward open cuts from top of foundation ditch section and vertical shaft changeover portion, foundation ditch section has excavated rear excavating shaft changeover portion, and on the cross section that vertical shaft changeover portion and tunnel excavation inducer connect, excavation has reserved tunnel hole;
The described vertical shaft changeover portion degree of depth downward from top is greater than the degree of depth of foundation ditch section, and the width that described vertical shaft changeover portion is vertical with tunnel direct of travel is greater than the width of foundation ditch section;
On the cross section that described vertical shaft changeover portion is connected with foundation ditch section, the additional part of the degree of depth is inner termination inner corner trim near the side of vertical shaft changeover portion, inner termination inner corner trim is in the process of vertical shaft changeover portion excavation to be reinforced by rotary churning pile, and the excavation process of vertical shaft changeover portion is faster than the reinforcing process of rotary churning pile.
The utility model also has distinguishes technical characteristic as follows:
On the cross section that described vertical shaft changeover portion is connected with foundation ditch section, the additional part of width is external end head inner corner trim near the side of foundation ditch section, external end head inner corner trim is reinforced by Double shaft stirring stake while being in vertical shaft changeover portion excavation, and the excavation process of vertical shaft changeover portion is slower than the reinforcing process of Double shaft stirring stake.
Described vertical shaft changeover portion is extremely concordant with bottom foundation ditch section by rammed earth at depth direction after having reinforced, then tunnel excavation inducer is constructed, in foundation ditch section and vertical shaft changeover portion, all compartment wall is set, and bound by cover plate in the top of foundation ditch section open cut formed and the top of vertical shaft changeover portion.
The dark 3.3m of the degree of depth of the depth ratio foundation ditch section of described vertical shaft changeover portion.
The utility model compared with prior art, has following technique effect:
(A) foundation ditch section and tunnel excavation inducer utilize vertical shaft changeover portion to form an entirety by excavation structure of the present utility model in work progress, improve tunnel entrance place soil layer construction, reduce the complexity of tunnel excavation inducer excavation.
(B) vertical shaft changeover portion space is large, is conducive to job site layout, reasonably distributes construction space, and then improves overall construction speed, effectively ensure that the duration, and passable, reduces the collision between machinery and support, ensure that construction safety.
(C) by reserved tunnel hole, leading pre-supporting is done to tunnel entrance construction, enhance the stability at tunnel entrance place.
(D) inner corner trim place in termination is reinforced by rotary churning pile, improves the stability of whole excavation structure.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the A-A cross section structure schematic diagram of Fig. 1.
Fig. 3 is the plan structure schematic diagram of constructing tunnel block when completing.
In figure, the implication of each label is: 1-foundation ditch section, 2-vertical shaft changeover portion, 3-tunnel excavation inducer, and 4-reserves tunnel hole, 5-inner termination inner corner trim, 6-rotary churning pile, 7-compartment wall, 8-external end head inner corner trim, the stake of 9-Double shaft stirring.
Below in conjunction with accompanying drawing, explanation is further explained in detail to particular content of the present utility model.
Detailed description of the invention
Below provide specific embodiment of the utility model, it should be noted that the utility model is not limited to following specific embodiment, all equivalents done on technical scheme basis all fall into protection domain of the present utility model.
Embodiment:
Defer to technique scheme, as shown in Figure 1 to Figure 3, the present embodiment provides a kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section, comprise foundation ditch section 2, described excavation structure also comprises tunnel excavation inducer 3, is provided with the vertical shaft changeover portion 2 connecting foundation ditch section 1 and tunnel excavation inducer 3 between foundation ditch section 1 and tunnel excavation inducer 3;
Described foundation ditch section 1, vertical shaft changeover portion 2 are concordant with the top of tunnel excavation inducer 3, the all downward open cuts from top of foundation ditch section 1 and vertical shaft changeover portion 2, foundation ditch section 1 has excavated rear excavating shaft changeover portion 2, and on the cross section that vertical shaft changeover portion 2 and tunnel excavation inducer 3 connect, excavation has reserved tunnel hole 4;
Described vertical shaft changeover portion 2 degree of depth downward from top is greater than the degree of depth of foundation ditch section 1, and the width that described vertical shaft changeover portion 2 is vertical with tunnel direct of travel is greater than the width of foundation ditch section 1;
On the cross section that described vertical shaft changeover portion 2 is connected with foundation ditch section 1, the additional part of the degree of depth is inner termination inner corner trim 5 near the side of vertical shaft changeover portion 2, inner termination inner corner trim 5 is in the process that vertical shaft changeover portion 2 excavates to be reinforced by rotary churning pile 6, and the excavation process of vertical shaft changeover portion 2 is faster than the reinforcing process of rotary churning pile 6.
On the cross section that vertical shaft changeover portion 2 is connected with foundation ditch section 1, the additional part of width is external end head inner corner trim 8 near the side of foundation ditch section 1, external end head inner corner trim 8 is in while vertical shaft changeover portion 2 excavates to be reinforced by Double shaft stirring stake 9, and the excavation process of vertical shaft changeover portion 2 is slower than the reinforcing process of Double shaft stirring stake 9.Adopt
the Double shaft stirring stake 9 of 700700, reinforcement depth is 3m under underground 2m to foundation ditch section 1, or controls to reach top, weathered rock formation.
Vertical shaft changeover portion 2 is extremely concordant with bottom foundation ditch section 1 by rammed earth at depth direction after having reinforced, then tunnel excavation inducer 3 is constructed, compartment wall 7 is all set in foundation ditch section 1 and vertical shaft changeover portion 2, and bound by cover plate in the top of foundation ditch section 1 open cut formed and the top of vertical shaft changeover portion 2.
The dark 3.3m of the degree of depth of the depth ratio foundation ditch section 1 of preferred vertical shaft changeover portion 2, the size 1620cm × 1450cm × 1510cm of corresponding vertical shaft changeover portion 2.
The work progress of excavation structure of the present utility model is as follows:
Step one: after foundation ditch section 1 applies, to external end head inner corner trim 8 soil stabilization outside hole, foundation ditch section 1 termination, adopt Double shaft stirring stake 9, reinforcement depth is 3m under underground 2m to foundation ditch section 1, or controls to reach top, weathered rock formation.
Step 2: apply vertical shaft changeover portion 2 while reinforcing external end head inner corner trim 8, vertical shaft changeover portion 2 size 1620cm × 1450cm × 1510cm, when vertical shaft changeover portion 2 applies and flushes bottom foundation ditch, along with continuation down applies vertical shaft changeover portion 2, reinforce at the soil body rotary churning pile 6 of vertical shaft changeover portion 2 section to the head bottom part inner termination inner corner trim 5 of foundation ditch section 1, until vertical shaft changeover portion 2 cheats stabilization zone, end soil body infinite compression strength be more than or equal to 1.0MPa.
Step 3: setting-out on the cross section that vertical shaft changeover portion 2 connects with tunnel excavation inducer 3, and utilize space enclosing structure to excavate reserved tunnel hole 4, reserved tunnel hole 4 size and tunnel clearance are consistent.After steel bar concrete is firm, remove foundation pit enclosure structure, Demolition Construction should reduce the impact on pit maintenance soil and agent structure.Vertical shaft changeover portion 2 is unearthed hole reserved steel bar connector.Vertical shaft changeover portion 2 is extremely concordant with bottom foundation ditch section 1 by ground landfill at depth direction after tunnel excavation inducer 3 has been constructed, vertical shaft changeover portion 2 is extremely concordant with bottom foundation ditch section 1 by rammed earth at depth direction after having reinforced, then tunnel excavation inducer 3 is constructed, compartment wall 7 is all set in foundation ditch section 1 and vertical shaft changeover portion 2, and bound by cover plate in the top of foundation ditch section 1 open cut formed and the top of vertical shaft changeover portion 2.
Claims (4)
1. the excavation structure of an open trench tunnel deep foundation ditch transition tunneling section, comprise foundation ditch section (1), it is characterized in that: described excavation structure also comprises tunnel excavation inducer (3), between foundation ditch section (1) and tunnel excavation inducer (3), be provided with the vertical shaft changeover portion (2) connecting foundation ditch section (1) and tunnel excavation inducer (3);
Described foundation ditch section (1), vertical shaft changeover portion (2) are concordant with the top of tunnel excavation inducer (3), foundation ditch section (1) and vertical shaft changeover portion (2) all downward open cuts from top, foundation ditch section (1) has excavated rear excavating shaft changeover portion (2), and on the cross section that vertical shaft changeover portion (2) and tunnel excavation inducer (3) connect, excavation has reserved tunnel hole (4);
Described vertical shaft changeover portion (2) degree of depth downward from top is greater than the degree of depth of foundation ditch section (1), and the width that described vertical shaft changeover portion (2) is vertical with tunnel direct of travel is greater than the width of foundation ditch section (1);
On the cross section that described vertical shaft changeover portion (2) is connected with foundation ditch section (1), the additional part of the degree of depth is inner termination inner corner trim (5) near the side of vertical shaft changeover portion (2), inner termination inner corner trim (5) is in the process that vertical shaft changeover portion (2) excavates to be reinforced by rotary churning pile (6), and the excavation process of vertical shaft changeover portion (2) is faster than the reinforcing process of rotary churning pile (6).
2. excavate structure as claimed in claim 1, it is characterized in that: on the cross section that described vertical shaft changeover portion (2) is connected with foundation ditch section (1), the additional part of width is external end head inner corner trim (8) near the side of foundation ditch section (1), external end head inner corner trim (8) is in while vertical shaft changeover portion (2) excavates to be reinforced by Double shaft stirring stake (9), and the excavation process of vertical shaft changeover portion (2) is slower than the reinforcing process of Double shaft stirring stake (9).
3. excavate structure as claimed in claim 1, it is characterized in that: described vertical shaft changeover portion (2) is extremely concordant with foundation ditch section (1) bottom by rammed earth at depth direction after having reinforced, then tunnel excavation inducer (3) is constructed, compartment wall (7) is all set in foundation ditch section (1) and vertical shaft changeover portion (2), and bound by cover plate in the top of foundation ditch section (1) open cut formed and the top of vertical shaft changeover portion (2).
4. excavate structure as claimed in claim 1, it is characterized in that: the dark 3.3m of the degree of depth of the depth ratio foundation ditch section (1) of described vertical shaft changeover portion (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845742.XU CN204357438U (en) | 2014-12-26 | 2014-12-26 | A kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845742.XU CN204357438U (en) | 2014-12-26 | 2014-12-26 | A kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section |
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| Publication Number | Publication Date |
|---|---|
| CN204357438U true CN204357438U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420845742.XU Expired - Fee Related CN204357438U (en) | 2014-12-26 | 2014-12-26 | A kind of excavation structure of open trench tunnel deep foundation ditch transition tunneling section |
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| CN (1) | CN204357438U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566212A (en) * | 2019-09-19 | 2019-12-13 | 中铁六局集团石家庄铁路建设有限公司 | Construction method for tunnel-first and well-second underground excavation air duct |
| CN113482630A (en) * | 2021-08-06 | 2021-10-08 | 中铁二局第四工程有限公司 | Pilot construction method applied to small-clear-distance double-hole tunnel |
-
2014
- 2014-12-26 CN CN201420845742.XU patent/CN204357438U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566212A (en) * | 2019-09-19 | 2019-12-13 | 中铁六局集团石家庄铁路建设有限公司 | Construction method for tunnel-first and well-second underground excavation air duct |
| CN110566212B (en) * | 2019-09-19 | 2021-08-06 | 中铁六局集团石家庄铁路建设有限公司 | Construction method for tunnel-first and well-second underground excavation air duct |
| CN113482630A (en) * | 2021-08-06 | 2021-10-08 | 中铁二局第四工程有限公司 | Pilot construction method applied to small-clear-distance double-hole tunnel |
| CN113482630B (en) * | 2021-08-06 | 2024-01-12 | 中铁二局第四工程有限公司 | Advanced pilot pit construction method applied to small-clear-distance double-hole tunnel |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20161226 |