CN110159309A - A kind of construction method using foam concrete backfill Tunneling by mining method - Google Patents
A kind of construction method using foam concrete backfill Tunneling by mining method Download PDFInfo
- Publication number
- CN110159309A CN110159309A CN201910446070.2A CN201910446070A CN110159309A CN 110159309 A CN110159309 A CN 110159309A CN 201910446070 A CN201910446070 A CN 201910446070A CN 110159309 A CN110159309 A CN 110159309A
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- China
- Prior art keywords
- foam concrete
- backfill
- feedhole
- construction method
- tunnel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000011381 foam concrete Substances 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 230000005641 tunneling Effects 0.000 title claims abstract description 13
- 239000002002 slurry Substances 0.000 claims description 45
- 238000002360 preparation method Methods 0.000 claims description 19
- 238000005187 foaming Methods 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 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
- E21D11/105—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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of construction methods using foam concrete backfill Tunneling by mining method, the following steps are included: lower section block wall is built, lower section backfills foam concrete, remove gib, upper section block wall is built, upper section backfills foam concrete, and the present invention has easy to operate, the low advantage of construction cost.
Description
Technical field
Construction field is backfilled the present invention relates to Tunneling by mining method more particularly to a kind of using foam concrete backfill Mining Method
The construction method in tunnel.
Background technique
Currently, there are following problems for Tunneling by mining method backfill construction: (1) tunnel cross-section is difficult to backfill closely knit, after easily causing
Continuous shield driving cutterhead discontinuity；(2) it commonly uses backfill material or intensity is excessively high, increase shield cutter abrasion or intensity is too low,
It causes face that can not provide enough counter-forces, then leads to pipe sheet assembling leakiness；(3) backfill operation is by external influence factor
Greatly, the easy the phenomenon that supply of backfill material occur not in time, and backfill efficiency is slow, causes the raising of cost of labor；(4) material is backfilled
Expect with high costs.According to current same type condition of construction, the above problem can not be all properly settled, majority is using backfill concrete, backfill
The techniques such as beans gravel, backfill and backfill mountain flour slag, wherein backfill concrete material is at high cost, and intensity is higher, later period shield driving
Cutterhead serious wear, and backfill beans gravel, soil or mountain flour slag and be then difficult to backfill closely knit, and mechanization degree is low, and backfill effect is slow
Slowly, high labor cost, backfill surface intensity is low, exists because of counter-pressure deficiency, section of jurisdiction is caused to splice uncompacted situation.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of easy to operate, construction cost
The low construction method using foam concrete backfill Tunneling by mining method.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of construction method using foam concrete backfill Tunneling by mining method, comprising the following steps:
S1: determining the section length of tunnel single backfill, completely builds block wall in the lower section of Tunneling by mining method, blocks coping
It is reserved to return slurry hole, the first feedhole is reserved in gib；
S2: being delivered to section under the first feedhole backfill tunnel for foam concrete, when returning slurry hole and returning slurry, then stops lower section
Slurry hole is returned in backfill, closure；
S3: abolishing the gib that section under tunnel has backfilled overlying regions, increases block wall to tunnel top, block wall top
It is reserved to return slurry hole and the second feedhole；
S4: by foam concrete be delivered to the second feedhole backfill tunnel on section, when return slurry hole return slurry when, then stop backfilling,
Slurry hole and the second feedhole are returned in closure；
S5: circulation step S1-S4 carries out the backfill of next section length, until backfill is completed.
As further improvement to above-mentioned technical proposal:
Described return in slurry hole is provided with slurry recovering tube.
In the step S3, the slurry hole of returning is located above the second feedhole.
The foam concrete is prepared and is conveyed by foam concrete automation preparation system, and the foam concrete is certainly
Dynamicization preparation system includes the hopper being sequentially communicated, blender, foaming machine and feed pipe.
The foam concrete specifically includes following preparation step: using cement and water as foam concrete raw material, being placed in material
It send after being mixed in bucket and is stirred evenly into blender, be subsequently sent to foam in foaming machine, obtain foam concrete.
The foam concrete raw material further includes hydrophober.
The foam concrete automation preparation system further includes multiple conveying pipelines, and the conveying pipeline is connected to hopper and stirs
It mixes between machine between blender and foaming machine.
Compared with the prior art, the advantages of the present invention are as follows:
1. operation of the present invention is simple, construction quickly, can apply to the backfill of various tunnel cross-sections, and backfill is closely knit, can be sufficiently
Tunnel cross-section is filled, while guaranteeing that shield duct piece is normally assembled, it is ensured that shield can speedy drivage, cutterhead uniform force,
Since foam concrete intensity is lower, convenient for shield speedy drivage and shield cutter abrasion condition is reduced.And construction of the invention
Method material consumption is low, and the artificial used time is few, and cost is greatly saved compared to traditional backfilling process, therefore has significant economic benefit
And social benefit.
2. foam concrete automation preparation may be implemented in foam concrete preparation system of the invention, when backfill according to
From the bottom to top, horizontal fragmentation, vertical layered principle are backfilled, and are separated between each segmentation using block wall, and backfill is quick and constructs
Quality is high.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Fig. 2 is that foam concrete automates preparation system schematic diagram.
Fig. 3 is that lower section backfills schematic diagram.
Fig. 4 is gib dismounting schematic diagram in tunnel after the backfill of lower section.
Fig. 5 is that upper section backfills schematic diagram.
Fig. 6 is line A-A sectional view in Fig. 3.
Fig. 7 is line B-B sectional view in Fig. 5.
Marginal data:
1, foam concrete automates preparation system；11, hopper；12, blender；13, foaming machine；14, feed pipe；15, conveying
Pipe；21, Mining Method just props up；22, gib；23, the first feedhole；24, block wall；25, slurry hole is returned；26, foam concrete；
27, the second feedhole；28, slurry recovering tube.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.Except no special theory
Bright, following material and instrument are commercially available.
As shown in Fig. 1 to 7, a kind of construction method using foam concrete backfill Tunneling by mining method of the invention, construction
Process are as follows: the lower masonry of section block wall 24 → lower section backfill foam concrete 26 → dismounting gib 22 → upper section blocks
The masonry of wall 24 → upper section backfills foam concrete 26, specifically includes the following steps:
S1: determining the section length of tunnel single backfill, completely build block wall 24 in the lower section of Tunneling by mining method, block wall 24
Top is reserved to return slurry hole 25, and the first feedhole 23 is reserved in gib 22；
S2: by foam concrete 26 be delivered to the first feedhole 23 backfill tunnel under section, when return slurry hole 25 return slurry when, then stop
Slurry hole 25 is returned in lower section backfill, closure；
S3: abolishing the gib 22 that section under tunnel has backfilled overlying regions, increases block wall 24 to tunnel top, block wall
24 tops are reserved to return slurry hole 25 and the second feedhole 27；
S4: by foam concrete 26 be delivered to the second feedhole 27 backfill tunnel on section, when return slurry hole 25 return slurry when, then stop
Slurry hole 25 and the second feedhole 27 are returned in backfill, closure；
S5: circulation step S1-S4 carries out the backfill of next section length, until backfill is completed.
It returns in slurry hole 25 and is provided with slurry recovering tube 28, for judging whether the backfill of 24 back side of block wall is closely knit.
In step S3, returns slurry hole 25 and be located at 27 top of the second feedhole.
Foam concrete 26 automates the preparation of preparation system 1 by foam concrete and conveys, foam concrete automation
Preparation system 1 includes hopper 11, blender 12, foaming machine 13 and the feed pipe 14 being sequentially communicated.Of the invention, foam concrete
The automation preparation of foam concrete 26 may be implemented in automation preparation system 1, and the foam concrete 26 after the completion of preparing is by sending
Expects pipe is delivered in Tunneling by mining method by high-pressure pump and is backfilled, and is set according to tunnel sectional area, single set equipment daily work load and quasi- investment
Standby quantity calculates, and the present embodiment section length is 20m.
Foam concrete 26 specifically includes following preparation step: using cement and water as foam concrete raw material, being placed in hopper
It send after being mixed in 11 into blender 12 and stirs evenly, be subsequently sent to foam in foaming machine 13, obtain foam concrete 26.
In the present embodiment, foam concrete raw material further includes hydrophober.
Foam concrete automation preparation system 1 further includes multiple conveying pipelines 15, and conveying pipeline 15 is connected to hopper 11 and stirs
It mixes between machine 12 between blender 12 and foaming machine 13.
In the present embodiment, according to actual needs, design foam concrete 26 is matched, and cement and water are mixed by 1.52 ratio of muds
It is sent into blender 12 after conjunction to be stirred, and mixes hydrophober according to the 1.2% of cement consumption in whipping process, it is ensured that foam is mixed
Solidifying soil finished product has certain waterproofness.
In the present embodiment, foaming agent is made 13 built in air compressor (not shown) of foaming machine, air compressor
Foam, and mixed in cement slurry according to default specific volume and bubble containing ratio 74.5%, bubble dosage 7kg/m are made automatically3Foam
Concrete 26, and through 14 force feed of feed pipe to corresponding backfill position.
In the present embodiment, feeding pipe diameter 50mm, material is rubber tube.
In the present embodiment, single foam concrete automation preparation system odd-numbered day workload that covers is 150 m3~300 m3, vertically
Effective delivery head is 120m, and horizontal effectively conveying distance is 300m.According to construction tunnel sectional area and equipment investment amount, planning
Single backfills length, really completes the segmentation in report Mining Method tunnel segment gib 22 dismounting one day after and backfills operation.
In the present embodiment, block wall 24 is with a thickness of 400mm, using 200 × 200 × 600mm foam brick masonry.
In the present embodiment, after the completion of lower section block wall 24 is built, using reserving the of 100mm diameter in gib 22
The downward section conveying foam concrete 26 of one feedhole 23 backfills.
That two diameter 60mm are reserved in the present embodiment, at the top of lower section block wall 24 returns slurry hole 25, and places slurry recovering tube
28, foam concrete 26 returns out through slurry recovering tube 28 can stop conveying.Gap is blocked with mortar between slurry recovering tube 28 and block wall 24
Tightly.
In the present embodiment, 28 diameter of slurry recovering tube is 50mm, and material is pvc pipe.
In the present embodiment, the insertion backfill of slurry recovering tube 28 segment length L is 200mm.
In the present embodiment, tunnel vault, Mining Method, which just prop up, sets plastic cement hook (not shown) on 21, links up with for hanging
Feed pipe 14 is hung, upper section is backfilled using feed pipe 14, and 14 end range segment separating end distance M of feed pipe is not more than
500mm。
In the present embodiment, needed at the top of upper section block wall 24 point about reserve diameter 60mm hole, hole center spacing is not
Greater than 100mm.Bottom hole pierced feed pipe 14, and top hole is for placing slurry recovering tube 28.
In the present embodiment, after upper section slurry recovering tube 28 has foam concrete 26 to return out, the feed pipe of insertion backfill section is cut off
14, and feed pipe 14 and slurry recovering tube 28 are blocked, complete the backfill of this circulation.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (7)
1. a kind of construction method using foam concrete backfill Tunneling by mining method, it is characterised in that: the following steps are included:
S1: it determines the section length of tunnel single backfill, completely builds block wall (24), block wall in the lower section of Tunneling by mining method
(24) top is reserved to return slurry hole (25), reserves the first feedhole (23) on gib (22)；
S2: by foam concrete (26) be delivered to the first feedhole (23) backfill tunnel under section, when return slurry hole (25) return slurry when,
Then stop lower section backfill, slurry hole (25) is returned in closure；
S3: abolishing the gib (22) that section under tunnel has backfilled overlying regions, increases block wall (24) to tunnel top, envelope
It is reserved at the top of wall (24) to return slurry hole (25) and the second feedhole (27)；
S4: by foam concrete (26) be delivered to the second feedhole (27) backfill tunnel on section, when return slurry hole (25) return slurry when,
Then stop backfilling, slurry hole (25) and the second feedhole (27) are returned in closure；
S5: circulation step S1-S4 carries out the backfill of next section length, until backfill is completed.
2. construction method according to claim 1, it is characterised in that: described return in slurry hole (25) is provided with slurry recovering tube
(28).
3. construction method according to claim 2, it is characterised in that: in the step S3, slurry hole (25) that returns is located at
Above second feedhole (27).
4. construction method according to any one of claim 1 to 3, it is characterised in that: the foam concrete (26) is logical
Foam concrete automation preparation system (1) is crossed to prepare and convey, foam concrete automation preparation system (1) include according to
Hopper (11), blender (12), foaming machine (13) and the feed pipe (14) of secondary connection.
5. construction method according to claim 4, it is characterised in that: the foam concrete (26) specifically includes following system
Standby step: it using cement and water as foam concrete raw material, is placed in hopper (11) after mixing and send into blender (12) stirring equal
It is even, it is subsequently sent to foam in foaming machine (13), obtains foam concrete (26).
6. construction method according to claim 5, it is characterised in that: the foam concrete raw material further includes hydrophober.
7. construction method according to claim 5, it is characterised in that: the foam concrete automates preparation system (1)
It further include multiple conveying pipelines (15), the conveying pipeline (15) is connected between hopper (11) and blender (12) and blender (12)
Between foaming machine (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910446070.2A CN110159309B (en) | 2019-05-27 | 2019-05-27 | Construction method for backfilling mine method tunnel with foam concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910446070.2A CN110159309B (en) | 2019-05-27 | 2019-05-27 | Construction method for backfilling mine method tunnel with foam concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110159309A true CN110159309A (en) | 2019-08-23 |
| CN110159309B CN110159309B (en) | 2021-03-23 |
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ID=67629192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910446070.2A Active CN110159309B (en) | 2019-05-27 | 2019-05-27 | Construction method for backfilling mine method tunnel with foam concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110159309B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343603A (en) * | 2020-09-30 | 2021-02-09 | 中交第二公路勘察设计研究院有限公司 | Comprehensive construction method suitable for tunneling of shield tunnel with ultra-large section |
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| Publication number | Publication date |
|---|---|
| CN110159309B (en) | 2021-03-23 |
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