CN111828050B - Construction method for small-section traffic hole to enter thin and high special-shaped space structure diversion lock chamber - Google Patents
Construction method for small-section traffic hole to enter thin and high special-shaped space structure diversion lock chamber Download PDFInfo
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- CN111828050B CN111828050B CN202010737662.2A CN202010737662A CN111828050B CN 111828050 B CN111828050 B CN 111828050B CN 202010737662 A CN202010737662 A CN 202010737662A CN 111828050 B CN111828050 B CN 111828050B
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- 238000010276 construction Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 43
- 230000007704 transition Effects 0.000 claims abstract description 40
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000005422 blasting Methods 0.000 claims description 41
- 238000009412 basement excavation Methods 0.000 claims description 32
- 230000008859 change Effects 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000000638 solvent extraction Methods 0.000 abstract description 4
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the technical field of building construction, in particular to a construction method for a diversion lock chamber of a small-section traffic hole into a thin and high special-shaped space structure, which comprises the following steps: step 1, constructing a transition section: carrying out primary support on a vault and a side wall of the transition section; step 2, constructing a lock chamber: the transition section carries out top-lifting construction on a lock chamber, primary support is carried out on the vault and side walls of the lock chamber, the upper part of the lock chamber is constructed by a step method, and the middle part of the lock chamber is constructed by a layered block method; step 3, excavating branch trunks: and flatly picking and digging the branch stem to ensure that the branch stem penetrates through the lower part of the lock chamber. The construction process is divided into an upper area, a middle area and a lower area to be excavated respectively, the upper part of the lock chamber is constructed by a step method, the middle part of the lock chamber is excavated by a layering and partitioning method, and finally the branch stem is constructed to enable the branch stem to be communicated with the lower part of the lock chamber.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for a diversion lock chamber of a small-section traffic hole into a thin and high special-shaped space structure.
Background
With the rapid development of diversion engineering construction, numerous diversion tunnels penetrate complex geology, the diversion tunnels are generally long and small in section, a water inlet lock chamber is generally required to be arranged at the intersection of a trunk and branches to realize diversion, a three-fork transition section is generally required to be arranged for passing, the trunk enters the transition section and then sequentially enters each branch, the structural section of the water inlet lock chamber is higher than that of the diversion tunnels due to equipment installation requirements, the lock chambers of the three-fork simultaneously communicate the transition section and the branches, construction is difficult, the traditional method adopts the transition section to be lifted to enter the lock chambers, then expanding excavation construction is carried out, namely, the shape of the lock chambers is firstly excavated, then the lock chambers are gradually expanded to the periphery to reach the preset size, so that the inner contour of the lock chambers is always in a changing state in the construction process, support and support in the lock chambers are inconvenient to be erected, and expanding excavation construction has certain oscillation to the space in the whole lock chambers, collapse accidents are easily caused.
Therefore, a technical scheme is needed at present to solve the technical problem that collapse accidents are easy to occur in the process of gate chamber construction after the transition section enters the gate chamber during the three-branch construction of the diversion tunnel in the prior art.
Disclosure of Invention
The invention aims to: aiming at the technical problem that collapse accidents easily occur in the construction process of a lock chamber after a transition section enters the lock chamber during the construction of a three-way intersection of a diversion tunnel in the prior art, the construction method for the diversion lock chamber of the small-section traffic tunnel to enter the thin and high special-shaped space structure is provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a construction method for a diversion lock chamber of a small-section traffic tunnel into a thin and high special-shaped space structure comprises the following steps:
The invention relates to a construction method of a diversion lock chamber with a small-section traffic tunnel into a thin and high special-shaped space structure, which comprises the steps of primarily supporting the side wall position of the vault of the tunnel during the construction process, strengthening the structural strength of the diversion tunnel, jacking into the upper part of the lock chamber by a transition section during the construction of the lock chamber, dividing the whole lock chamber into an upper region, a middle region and a lower region for respectively excavating, constructing the upper part of the lock chamber by a step method, excavating gradually from top to bottom, excavating the middle part of the lock chamber by a layering and partitioning method, dividing the middle part of the lock chamber into a plurality of layers in the height direction, dividing the middle part of the lock chamber into a plurality of blocks in each layer, so that the excavation has small influence on the stability of the surrounding tunnel structure, is convenient for observing the geological conditions of each layer and each block, is convenient for preventing emergencies, the safety during the construction process is improved, the lower part of the lock chamber is communicated with a branch stem, and the branch is communicated with the lower part of the lock chamber, the phenomena of gate chamber collapse and the like caused by insufficient strength of the lower part of the gate chamber are avoided.
As a preferred embodiment of the present invention, the step 1 further includes a step 1.1 of optimizing the shape of the transition section: the transition section is provided with a plurality of lock chamber interfaces, and the axes of the lock chamber interfaces are perpendicular to the side wall of the lock chamber. The transition section does not need to convert the tunnel face in the process of entering the lock chamber, and the construction efficiency is improved.
As a preferable scheme of the invention, the preliminary bracing comprises the steps of spraying concrete on the vault and the side wall and installing a plurality of supporting frames. The tunnel is reinforced by spraying concrete on the vault and the side wall of the tunnel, and the mounting support frame supports the vault and the side wall in the tunnel, so that the tunnel can keep enough strength in the construction process to bear the destructive force brought by various construction operations in the construction process.
As the preferable scheme of the invention, the support frame comprises an arc-shaped rod matched with the vault in shape, and two ends of the arc-shaped rod are respectively provided with an upright post. The arc-shaped rod and the two stand columns are connected to form a door-shaped structure, so that the support frame can be abutted against the vault and the side wall of the tunnel after being installed in the tunnel, and the vault and the side wall of the tunnel are supported.
As a preferred embodiment of the present invention, the hierarchical block method includes: the method comprises the steps of firstly dividing the middle part of a lock chamber into a plurality of excavation layers along the height direction of the lock chamber, then dividing each excavation layer into a plurality of excavation blocks, selecting one excavation block to excavate, and then excavating other excavation blocks in sequence, wherein the height of each excavation is the same as the height of the excavation layer.
As a preferred scheme of the invention, for a plurality of excavation blocks of each layer, the excavation block of the first excavation adopts vertical shallow hole blasting, and other excavation blocks adopt presplitting blasting. The vertical shallow hole blasting is that blasting holes are formed in the upper end of a blasting area for blasting, the presplitting blasting is that blasting holes are formed in the side wall of the blasting area for blasting, one excavating block on one excavating layer forms a step after vertical shallow hole blasting is performed, presplitting blasting is performed on other excavating blocks on the excavating layer, and therefore the disturbance of blasting on the peripheral wall of the tunnel is reduced, and the safety of the construction process is improved.
As a preferable scheme of the invention, in the step 2, after the construction is completed in the middle of the lock chamber, grouting holes are formed in the side wall of the middle of the lock chamber, and grouting anchor pipes are arranged in the grouting holes. Grout is poured into the rock stratum through the grouting holes in the side wall of the middle part of the lock chamber, so that the structural strength of the peripheral wall of the tunnel is improved, and preparation is made for construction of the lower part of the rear lock chamber.
As a preferable scheme of the invention, the grouting hole is arranged obliquely downwards. And slurry is conveyed to the lower part of the lock chamber through the grouting holes which are obliquely arranged downwards, so that the surrounding rock stratum at the lower part of the lock chamber is reinforced, and the safety of blasting construction at the lower part of the lock chamber is ensured.
In the step 3, in the construction of the branch entering the lower part of the lock chamber, the bottom plate, the side wall and the vault of the branch are all constructed by adopting the enlarged external inserting angle blasting. The amplified external inserting angle blasting refers to that when the branch stem enters the gate chamber, blasting holes outside the inclined tunnel are formed in the peripheral wall of the tunnel to blast, the distance between the side walls on the two sides of the lower portion of the gate chamber is larger than that between the side walls on the two sides of the branch stem, and the bottom of the gate chamber is lower than that of the branch stem, so that the amplified external inserting angle blasting is adopted for construction, the later-stage correction work can be reduced, and the construction efficiency is improved.
In the step 3, as a preferable scheme of the invention, when the branch enters the lower part of the chamber from the branch during the excavation, manual trimming is adopted at the sudden clearance between the branch and the chamber. The clearance abrupt change position is a junction of the branch stem and the gate chamber, the construction amount of the clearance abrupt change position is small, large-scale equipment and an explosion mode are not easy to construct, construction precision can be improved by manual trimming construction, and construction safety is guaranteed.
As a preferable scheme of the present invention, in the step 3, a connecting rod is arranged at the bottom of the branch stem, and the connecting rod is detachably connected with a supporting frame in the lock chamber. The support frame bottom is equipped with the horizontal pole, the horizontal pole both ends respectively with two the stand is connected, the connecting rod with the detachable connection of horizontal pole, more specifically, in order to guarantee to form the outrigger to lock chamber upper portion and middle part setting, every the support frame below is equipped with two the connecting rod, two the connecting rod sets up respectively the lock chamber both sides.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention relates to a construction method of a diversion lock chamber with a small-section traffic tunnel into a thin and high special-shaped space structure, which comprises the steps of primarily supporting the side wall position of the vault of the tunnel during the construction process, strengthening the structural strength of the diversion tunnel, jacking the transition section into the upper part of the lock chamber during the construction of the lock chamber, dividing the whole lock chamber into an upper region, a middle region and a lower region for respectively excavating, constructing the upper part of the lock chamber by adopting a step method, excavating gradually from top to bottom, excavating the middle part of the lock chamber by adopting a layering and partitioning method, dividing the middle part of the lock chamber into a plurality of layers in the height direction, dividing the middle part of the lock chamber into a plurality of blocks in each layer, thus ensuring that the excavation has small influence on the stability of the surrounding tunnel structure, being convenient for observing the geological conditions of each layer and each block, being convenient for preventing emergencies, improving the safety during the construction process, ensuring that the lower part of the lock chamber is communicated with a branch stem, and the lower part of the lock chamber by constructing the branch stem, the phenomena of gate chamber collapse and the like caused by insufficient strength of the lower part of the gate chamber are avoided.
Drawings
FIG. 1 is a construction flow chart of a construction method for a diversion gate chamber of a small-section traffic tunnel into a thin and high special-shaped space structure;
FIG. 2 is a layout view of the trunk, branches, transition sections and chambers of the present invention;
FIG. 3 is a diagram illustrating the position relationship between the lock chamber and the stem according to the present invention;
FIG. 4 is a schematic diagram of the layered block construction of the present invention;
FIG. 5 is a schematic structural view of the support frame according to the present invention;
FIG. 6 is a schematic construction diagram of step 3 of the invention;
the labels in the figure are: 1-trunk, 2-branch, 3-gate chamber, 31-digging layer, 311-digging fast, 4-transition section, 41-gate chamber interface, 5-support frame, 51-arc rod, 52-upright post, 53-cross rod, 54-connecting rod and 6-blast hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-6, the invention relates to a construction method of a diversion lock chamber with a small-section traffic hole entering thin and high special-shaped space structure, which comprises the following steps:
step 1.1, optimizing the shape of a transition section: be equipped with a plurality of lock chamber interfaces 41 on the changeover portion 4, the axis of lock chamber interface 41 sets up perpendicular to 3 lateral walls of lock chamber for also need not to change the face in the changeover portion 4 entering lock chamber 3 in-process, improved the efficiency of construction.
Specifically, the primary support comprises concrete spraying on a vault and a side wall, and a plurality of support frames 5 are installed, the support frames are uniformly arranged along the length direction of the tunnel, the tunnel is reinforced by spraying the concrete on the vault and the side wall of the tunnel, C20 concrete is sprayed on the vault and the side wall of the transition section 4 and the lock chamber 3, the thickness of the support frames is 20cm, meanwhile, the support frames 5 are installed in the tunnel to support the vault and the side wall, so that the tunnel can keep enough strength in the construction process to bear the destructive power brought by various construction operations in the construction process, wherein the support frames 5 comprise arc-shaped rods 51 matched with the vault in shape, the two ends of the arc-shaped rods 51 are respectively provided with stand columns 52, the arc-shaped rods 51 are connected with the two stand columns 51 to form a door-shaped structure, so that the support frames 5 can be abutted against the vault and the side wall of the tunnel after being installed in the tunnel, thereby forming support for the vault and the side wall of the tunnel;
the hierarchical blocking method comprises the following steps: firstly, the middle part of the lock chamber 4 is divided into a plurality of excavating layers 31 along the height direction of the lock chamber 4, each excavating layer 31 is divided into a plurality of excavating blocks 311, one excavating block 311 is selected for excavating, then other excavating blocks 311 are excavated in sequence, the height of each excavation is the same as the height of the excavating layer 31, thus the influence of each construction on the surrounding structure of the lock chamber is small, the geological conditions of each excavating block 311 and each excavating layer 31 are convenient to observe, the emergency can be prevented, for the plurality of excavating blocks 311 of each layer, the excavating block 311 excavated at the first adopts vertical shallow hole blasting, the other excavating blocks adopt presplitting blasting, wherein the vertical shallow hole blasting is that blasting holes are arranged at the upper end of a blasting area for blasting, the presplitting blasting is that blasting holes are arranged from the side wall of the blasting area for blasting, and a step is formed after the vertical shallow hole blasting is carried out on one excavating block 311 on one excavating layer 31, and then, pre-splitting blasting is carried out on other excavation blocks 311 of the excavation layer 31, so that the disturbance of blasting on the peripheral wall of the tunnel is reduced, and the safety of the construction process is improved.
Further, in the step 2, after the construction of the middle part of the lock chamber 3 is completed, a grouting hole is formed in the side wall of the middle part of the lock chamber 3, a grouting anchor pipe is arranged in the grouting hole, grout is poured into the rock stratum through the grouting hole in the side wall of the middle part of the lock chamber 3, so that the structural strength of the peripheral wall of the tunnel is improved, preparation is made for the construction of the lower part of the lock chamber 3 behind, further, the grouting hole is obliquely arranged downwards, and the grout is conveyed to the lower part of the lock chamber through the grouting hole which is obliquely arranged downwards, so that the rock stratum around the lower part of the lock chamber is strengthened, and the safety of blasting construction at the lower part of the lock chamber is ensured.
Further, in step 3, in the construction that the branch stem 2 enters the lower part of the lock chamber 3, the branch stem bottom plate, the side walls and the vault are all constructed by adopting the amplification external insertion angle blasting, wherein the amplification external insertion angle blasting means that when the branch stem 2 enters the lock chamber 3, the blasting holes 6 outside the inclined tunnel are formed in the peripheral wall of the tunnel for blasting, and the distance between the side walls on the two sides of the lower part of the lock chamber 3 is larger than that between the side walls on the two sides of the branch stem 2, and the bottom of the lock chamber 3 is lower than that of the bottom of the branch stem 2, so that the later-stage correction work can be reduced by adopting the amplification external insertion angle blasting, and the construction efficiency is improved.
Further, in the step 3, in the excavating process, when the branch stem 2 enters the lower part of the lock chamber 3, the clearance sudden change part of the branch stem 2 and the lock chamber 3 is manually trimmed, wherein the clearance sudden change part is the junction of the branch stem 2 and the lock chamber 3, the construction amount of the clearance sudden change part is small, large-scale equipment and a blasting mode are not easy to construct, the construction precision can be improved by adopting manual trimming construction, and the construction safety is favorably ensured.
Further, in the step 3, a connecting rod 54 is arranged at the bottom of the stem 2, the connecting rod 54 is detachably connected with the support frame 5 in the lock chamber 3, specifically, a cross rod 53 is arranged at the bottom of each support frame 5, two ends of each cross rod 53 are respectively connected with the two upright posts 52, the connecting rod 54 is detachably connected with the cross rod 53, more specifically, in order to ensure that the support frames 5 arranged at the upper part and the middle part of the lock chamber 5 form stable support, two connecting rods 54 are arranged below each support frame 5, the two connecting rods 54 are respectively arranged at two sides of the lock chamber 3, and when the stem penetrates through the lower part of the lock chamber, the support frames are connected with the connecting rods, so that the length extension of the support frames is realized, and the support frames can still play a supporting role after the stem penetrates through the lower part of the lock chamber.
The invention relates to a construction method of a diversion lock chamber with a small-section traffic tunnel into a thin and high special-shaped space structure, which is characterized in that the vault side wall position of the tunnel is initially supported during the construction process, the structural strength of the diversion tunnel is enhanced, a transition section 4 is lifted into the upper part of the lock chamber 3 during the construction of the lock chamber 3, the whole lock chamber 3 is divided into an upper area, a middle area and a lower area to be respectively excavated, the upper part of the lock chamber 3 is constructed by a step method and is gradually excavated from top to bottom, the middle part of the lock chamber is excavated by a layering and partitioning method, the middle part of the lock chamber 3 is divided into a plurality of layers in the height direction, the middle part of the lock chamber is divided into a plurality of blocks in each layer, thus the excavation has small influence on the stability of the surrounding tunnel structure, is convenient for observing the geological condition of each layer and each block, is convenient for preventing emergencies, the safety during the construction process is improved, the lower part of the lock chamber 3 is communicated with a branch stem 2, and finally the branch 2 is constructed to ensure that the lower part of the branch 2 is communicated with the lock chamber 3, the phenomenon that the chamber 3 collapses and the like caused by insufficient strength of the lower part of the chamber 3 is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A construction method for a diversion gate chamber of a small-section traffic hole into a thin and high special-shaped space structure is characterized by comprising the following steps:
step 1, constructing a transition section: the main trunk (1) is jacked to construct a transition section (4), and the vault and the side wall of the transition section (4) are initially supported;
step 2, constructing a lock chamber: the transition section (4) is used for constructing the gate chamber (3) by top lifting, the vault and the side wall of the gate chamber (3) are primarily supported, the upper part of the gate chamber (3) is constructed by a step method, and the middle part of the gate chamber (3) is constructed by a layered and block method;
step 3, excavating branch trunks: the branch stem (2) is horizontally lifted and excavated, so that the branch stem (2) penetrates through the lower part of the lock chamber (3).
2. The construction method of the diversion gate chamber of the small-section traffic tunnel into the thin and high special-shaped space structure according to claim 1, wherein the step 1 further comprises the step 1.1 of optimizing the shape of the transition section: the transition section (4) is provided with a plurality of lock chamber interfaces (41), and the axes of the lock chamber interfaces (41) are perpendicular to the side wall of the lock chamber (3).
3. The construction method of the diversion lock chamber of the small-section traffic tunnel into the thin and high special-shaped space structure according to claim 1, wherein the preliminary bracing comprises spraying concrete on the vault and the side wall and installing a plurality of support frames (5).
4. The construction method of the diversion lock chamber of the small-section traffic hole into the thin and high special-shaped space structure according to claim 3, wherein the supporting frame (5) comprises an arc-shaped rod (51) matched with the shape of a vault, and two ends of the arc-shaped rod (51) are respectively provided with a stand column (52).
5. The construction method of the diversion gate chamber of the small-section traffic tunnel into the thin and high special-shaped space structure according to claim 1, wherein the layering and blocking method comprises the following steps: firstly, the middle part of a gate chamber (3) is divided into a plurality of excavation layers (31) along the height direction of the gate chamber (3), each excavation layer (31) is divided into a plurality of excavation blocks (311), one excavation block (311) is selected for excavation, other excavation blocks (311) are sequentially excavated, and the height of each excavation is the same as the height of the excavation layer (31).
6. The construction method of the diversion lock chamber with the small-section traffic hole and the thin-high special-shaped space structure according to claim 5 is characterized in that for the plurality of excavating blocks (311) on each layer, the excavating block (311) of the first excavation adopts vertical shallow hole blasting, and the other excavating blocks (311) adopt presplitting blasting.
7. The construction method of the diversion gate chamber with the small-section traffic hole into the thin and high special-shaped space structure according to any one of claims 1 to 6, wherein in the step 2, after the construction is completed in the middle of the gate chamber (3), grouting holes are formed in the side wall of the middle of the gate chamber (3), and grouting anchor pipes are arranged in the grouting holes.
8. The construction method of the diversion lock chamber with the small-section traffic tunnel into the thin and high special-shaped space structure according to any one of claims 1 to 6, wherein in the step 3, in the construction of the branch (2) entering the lower part of the lock chamber (3), the bottom plate, the side wall and the arch crown of the branch (2) are all constructed by adopting the enlarged external inserting angle blasting.
9. The construction method of the diversion lock chamber of the small-section traffic tunnel thin and high special-shaped space structure according to any one of claims 1 to 6, wherein in the step 3, when the branch stem (2) enters the lower part of the lock chamber (3) in the excavation process, the clearance abrupt change part of the branch stem (2) and the lock chamber (3) is manually trimmed.
10. The construction method of the diversion lock chamber with the small-section traffic tunnel into the thin and high special-shaped space structure according to any one of claims 1 to 6, wherein in the step 3, a connecting rod (54) is arranged at the bottom of the branch stem (2), and the connecting rod (54) is detachably connected with a support frame (5) in the lock chamber (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010737662.2A CN111828050B (en) | 2020-07-28 | 2020-07-28 | Construction method for small-section traffic hole to enter thin and high special-shaped space structure diversion lock chamber |
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| CN202010737662.2A CN111828050B (en) | 2020-07-28 | 2020-07-28 | Construction method for small-section traffic hole to enter thin and high special-shaped space structure diversion lock chamber |
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| CN111828050B true CN111828050B (en) | 2022-04-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108677892A (en) * | 2018-07-27 | 2018-10-19 | 中国电建集团成都勘测设计研究院有限公司 | Diversion tunnel working tunnel is used as reconstruction structure of the ecology for water hole |
| CN111236240A (en) * | 2020-01-13 | 2020-06-05 | 中国水利水电第七工程局有限公司 | Narrow rock wall crane beam excavation method |
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2020
- 2020-07-28 CN CN202010737662.2A patent/CN111828050B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677892A (en) * | 2018-07-27 | 2018-10-19 | 中国电建集团成都勘测设计研究院有限公司 | Diversion tunnel working tunnel is used as reconstruction structure of the ecology for water hole |
| CN111236240A (en) * | 2020-01-13 | 2020-06-05 | 中国水利水电第七工程局有限公司 | Narrow rock wall crane beam excavation method |
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| 乌东德泄洪洞工作闸室变形稳定分析及加固处理;康旭升等;《中国水利》;20171231;第78-81、95页 * |
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