CN111042833A - Method for simply backfilling concrete by buckling arch in guide hole of station by using hole-pile method - Google Patents
Method for simply backfilling concrete by buckling arch in guide hole of station by using hole-pile method Download PDFInfo
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- CN111042833A CN111042833A CN201911234934.0A CN201911234934A CN111042833A CN 111042833 A CN111042833 A CN 111042833A CN 201911234934 A CN201911234934 A CN 201911234934A CN 111042833 A CN111042833 A CN 111042833A
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- concrete
- station
- primary support
- hole
- backfilling
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- 239000004567 concrete Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims description 7
- 239000011120 plywood Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000009415 formwork Methods 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- -1 Poly Butylene Polymers 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
-
- 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
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (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 simple concrete backfilling method for a buckling arch in a guide hole of a station by a hole-pile method, which comprises the following steps: 1) after the side piles and the crown beam are poured, erecting a station primary grid above the crown beam; 2) after the primary support grating is erected, a sealing plate is adopted to close a mold on the clear side of the primary support grating of the station, a concrete feed port is reserved in the arch part, and the sealing plate is supported by a support rod; 3) spraying concrete on the outer side of the station primary support grid to form a station main body primary support structure; 4) and (4) carrying out concrete backfill construction on the outer side of the primary support grid of the station by utilizing the concrete feeding hole, wherein the backfill construction is carried out twice. The method can reduce the use of a concrete formwork support system, reduce the material cost, is simple and convenient to operate, can carry out flow construction, and obviously improves the construction efficiency.
Description
Technical Field
The invention relates to the field of tunnel construction, in particular to a method for simply backfilling concrete by a buckling arch in a station pilot tunnel by a hole-pile method.
Background
The shallow buried underground excavation station is mostly constructed by adopting a PBA (Poly Butylene glycol Acrylonitrile-co-Acrylonitrile-styrene-butadiene-styrene) construction method. After the construction of the side piles and the crown beams of the station is finished, primary support buckling and arching are required to be carried out in the pilot tunnel, and the space between the primary support of the small pilot tunnel and the primary support of the main body of the station is backfilled compactly.
For concrete backfill construction, the prior art adopts a formwork support system to complete one-time pouring, as shown in fig. 6 and 7, the concrete steps are as follows:
(1) after the side piles and the crown beam are poured, erecting a station primary grid above the crown beam;
(2) building a concrete formwork support system on the clear side of the primary support grid of the station;
(3) pouring and backfilling concrete at one time;
(4) after the backfilled concrete is cured, disassembling the concrete formwork support system, and then conveying to the next section of the pilot tunnel for re-construction, pouring and backfilling;
(5) and repeating the steps.
This backfill has the following disadvantages: in order to ensure continuous operation, more than 2 sets of templates, main steel ribs and secondary steel ribs are required to be put into the device at one time; the erecting and the disassembling of the die carrier supporting system are labor-consuming and time-consuming, and the cost is higher; if the formwork support system is used for pouring, the concrete load is easy to exceed the limit, the formwork needs expert demonstration, and the risk is high.
Disclosure of Invention
In order to solve the technical problem, the invention discloses a method for simply backfilling concrete by a buckling arch in a station pilot tunnel by a hole-pile method.
The invention is realized by the following technical scheme:
a method for simply backfilling concrete by buckling arches in a guide tunnel of a station by a hole-pile method comprises the following steps:
1) after the side piles and the crown beam are poured, erecting a station primary grid above the crown beam;
2) after the primary support grating is erected, a sealing plate is adopted to close a mold on the clear side of the primary support grating of the station, a concrete feed port is reserved in the arch part, and the sealing plate is supported by a support rod;
3) spraying concrete on the outer side of the station primary support grid to form a station main body primary support structure;
4) and (4) carrying out concrete backfill construction on the outer side of the primary support grid of the station by utilizing the concrete feeding hole, wherein the backfill construction is carried out twice.
According to the station main body primary support structure and the sealing plate, which are constructed by pouring concrete in the station primary support grating, are used as concrete backfill templates, a special pouring template is not needed, the use of a concrete framework support system is reduced, the equipment cost is obviously reduced, the construction of a template in the early stage is not needed, the operation is simple and convenient, the flow construction can be realized, the influence of concrete supply is avoided, and the construction efficiency is improved.
In the step 2), the sealing plate is a wood plywood, the thickness of the sealing plate is 10mm, and the supporting rod is a steel pipe.
Further, in the step 2), the number of the concrete feeding holes is multiple, and the distance between every two adjacent concrete feeding holes is 5 m.
Further, in the step 3), the thickness of the concrete sprayed on the outer side of the station primary support grid is 350 mm.
Further, in the step 4), backfilling construction is carried out after the primary support structure of the main body of the station reaches 75% of the design strength.
Further, the backfill construction process specifically comprises the following steps: and (3) injecting concrete from the concrete inlet, stopping injecting after the injection amount of the concrete reaches 1/2 of the outer space of the primary support structure of the station main body, and continuously injecting the concrete to fill the outer space of the primary support structure of the station main body after the concrete is cured.
According to the invention, the concrete backfilling is carried out twice, and the secondary pouring is carried out after the first concrete is cured, so that the overlarge pressure bearing of the primary support structure of the main body of the station is avoided, and the safety of the construction process is improved.
Further, in the step 3), the concrete is sprayed with C25.
Further, in the step 4), the concrete is C20 commercial concrete.
Furthermore, after the concrete of backfilling construction is completely cured, the sealing plate and the supporting rod can be taken down, and the main body primary support structure can also be taken down after the design strength reaches 75%.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to a method for simply backfilling concrete by buckling arches in a guide hole of a station by using a hole-pile method.A main primary support structure and a sealing plate of the station, which are constructed by pouring concrete in a primary support grid of the station, are used as concrete backfilling templates, a special pouring template is not needed, the use of a concrete framework support system, a main steel edge and a secondary steel edge is reduced, the cost is reduced, the equipment cost is obviously reduced, the construction of a template at the early stage is not needed, the operation is simple and convenient, the flow construction can be realized, the influence of concrete supply is avoided, the construction period is shortened, and the construction efficiency is improved;
2. the invention relates to a method for simply backfilling concrete by a buckling arch in a guide hole of a station by a hole pile method.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a cross-sectional view of the primary support grid structure of a station of the present invention;
FIG. 2 is a cross-sectional view of the sealing plate of the present invention;
FIG. 3 is a cross-sectional view of the primary support structure of the main body of the station of the present invention;
FIG. 4 is a cross-sectional view of the 1 st backfilled concrete of the present invention;
FIG. 5 is a cross-sectional view of the 2 nd backfilled concrete of the present invention;
FIG. 6 is a schematic diagram of template construction in the background art;
fig. 7 is a schematic diagram of concrete backfilling in the background art.
Reference numbers and corresponding part names in the drawings:
1-crown beam, 2-preliminary bracing grid, 3-wood plywood, 4-concrete feed inlet, 5-pilot hole, 6-steel pipe, 7-station main body preliminary bracing structure and 8-C20 commercial concrete.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The invention relates to a method for simply backfilling concrete by buckling arches in a guide tunnel of a station by a tunnel pile method, which comprises the following steps:
1) after the side piles and the crown beam are poured, erecting a station primary grid above the crown beam;
2) after the primary support grating is erected, a sealing plate is adopted to close a mold on the clear side of the primary support grating of the station, a concrete feed port is reserved in the arch part, and the sealing plate is supported by a support rod;
3) spraying concrete on the outer side of the station primary support grid to form a station main body primary support structure;
4) and (4) carrying out concrete backfill construction on the outer side of the primary support grid of the station by utilizing the concrete feeding hole, wherein the backfill construction is carried out twice.
Example 2
This embodiment is based on embodiment 1, the closing plate is wood plywood, and closing plate thickness is 10mm, the bracing piece is the steel pipe.
Furthermore, the concrete feed inlets are a plurality of, and the distance between adjacent concrete feed inlets is 5 m.
Further, the thickness of the concrete sprayed on the outer side of the station primary support grid is 350 mm.
Further, after the primary support structure of the main body of the station reaches 75% of the design strength, backfilling construction is carried out.
Further, the backfill construction process specifically comprises the following steps: and (3) injecting concrete from the concrete inlet, stopping injecting after the injection amount of the concrete reaches 1/2 of the outer space of the primary support structure of the station main body, and continuously injecting the concrete to fill the outer space of the primary support structure of the station main body after the concrete is cured.
Further, in the step 3), the concrete is sprayed with C25.
Further, in the step 4), the concrete is C20 commercial concrete.
Furthermore, after the concrete of backfilling construction is completely cured, the sealing plate and the supporting rod are taken down.
Example 3
The invention relates to a method for simply backfilling concrete by buckling arches in a guide tunnel of a station by a tunnel pile method, which comprises the following steps:
(1) as shown in fig. 1, after the side piles and the crown beam 1 are poured, a station primary grid 2 is erected above the crown beam 1.
(2) As shown in fig. 2, after the primary grid 2 is erected, the mold is closed on the clearance side of the primary grid 2 at the station by adopting the wood plywood 3 with the thickness of 10mm, a plurality of dry concrete feed inlets 4 are reserved in the arch part, the dry concrete feed inlets 4 are distributed along the length direction of the pilot tunnel 5, the distance between the concrete feed inlets 4 is 5m, and finally, the simple steel pipe 6 supports the wood plywood 3.
(3) As shown in fig. 3, C25 shotcrete having a thickness of 350mm is sprayed on the outer side of the station preliminary bracing grid 2, and combined with the station preliminary bracing grid 2 to form a station main body preliminary bracing structure 7.
(4) As shown in fig. 4 and 5, after the primary support structure 7 of the main body of the station reaches 75% of the design strength (generally, 7 days), the reserved concrete feed inlet 4 is used for backfilling the concrete at the back of the primary support structure 7 of the main body of the station, specifically: c20 commercial concrete 8 is injected from the concrete inlet 4, the injection is stopped when the injection amount of the concrete reaches 1/2 of the space outside the primary support structure 7 of the main body of the station, and after the concrete is cured, the C20 commercial concrete 8 is continuously injected to fill the space outside the primary support structure 7 of the main body of the station.
(5) And after the C20 commercial concrete 8 in the backfilling construction is completely cured, taking down the wood veneer 3 and the steel pipe 6.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for simply backfilling concrete by buckling an arch in a station pilot tunnel (5) by a hole-pile method is characterized by comprising the following steps:
1) after the side piles and the crown beam (1) are poured, erecting a station primary grid (2) above the crown beam (1);
2) after the primary support grating (2) is erected, closing a mold on the clearance side of the primary support grating (2) of the station by adopting a sealing plate, reserving a concrete feed port (4) in an arch part, and supporting the sealing plate by using a supporting rod;
3) concrete is sprayed on the outer side of the station primary support grid (2) to form a station main body primary support structure (7);
4) and (3) carrying out concrete backfill construction on the outer side of the primary support grid (2) of the station by utilizing the concrete feeding hole (4), wherein the backfill construction is carried out twice.
2. The method for simply backfilling concrete by the internal buckling arch of the guide tunnel (5) of the station by the hole pile method according to claim 1, wherein in the step 2), the sealing plate is a wood plywood (3), the thickness of the sealing plate is 5-15 mm, and the supporting rod is a steel pipe (6).
3. The method for simply backfilling concrete through the inner buckling arch of the guide tunnel (5) of the station by the hole-pile method according to claim 1, wherein in the step 2), the number of the concrete feeding holes (4) is multiple, and the distance between every two adjacent concrete feeding holes (4) is 6-8 m.
4. The method for simply backfilling concrete by the internal buckling arch of the guide tunnel (5) of the station by the hole pile method according to claim 1, wherein in the step 3), the thickness of the concrete sprayed on the outer side of the primary support grid (2) of the station is 250-350 mm.
5. The method for simply backfilling the concrete by the inner buckling arch of the guide tunnel (5) of the station by the hole pile method according to claim 1, wherein in the step 4), backfilling construction is carried out after the designed strength of the primary support structure (7) of the main body of the station reaches 75%.
6. The method for simply backfilling concrete by the inner buckling arch of the guide tunnel (5) of the station by the hole-pile method as claimed in claim 5, wherein the backfilling construction process specifically comprises the following steps: and (3) injecting concrete from the concrete inlet (4), stopping injecting after the injection amount of the concrete reaches 1/3-2/3 of the outer space of the primary support structure (7) of the station main body, and continuously injecting the concrete to fill the outer space of the primary support structure (7) of the station main body after the concrete is cured.
7. The method for simply backfilling concrete by an inner buckling arch of a guide tunnel (5) of a station by a hole pile method according to claim 1, wherein in the step 3), the concrete is sprayed by C25.
8. The method for simply backfilling concrete by buckling arches in a guide tunnel (5) of a station by a hole-pile method according to claim 1, wherein in the step 4), the concrete is C20 commercial concrete (8).
9. The method for simply backfilling concrete by the internal buckling arch of the guide tunnel (5) of the station by the hole pile method is characterized in that the sealing plate and the supporting rod are taken down after the backfilling construction concrete is completely cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234934.0A CN111042833A (en) | 2019-12-05 | 2019-12-05 | Method for simply backfilling concrete by buckling arch in guide hole of station by using hole-pile method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234934.0A CN111042833A (en) | 2019-12-05 | 2019-12-05 | Method for simply backfilling concrete by buckling arch in guide hole of station by using hole-pile method |
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| Publication Number | Publication Date |
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| CN111042833A true CN111042833A (en) | 2020-04-21 |
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| CN201911234934.0A Pending CN111042833A (en) | 2019-12-05 | 2019-12-05 | Method for simply backfilling concrete by buckling arch in guide hole of station by using hole-pile method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060062A (en) * | 2021-12-08 | 2022-02-18 | 刁志刚 | Construction method for side hole primary support buckling arch in construction of underground excavated station by using hole-pile method |
| CN114294020A (en) * | 2021-12-31 | 2022-04-08 | 北京市政建设集团有限责任公司 | Side guide hole backfill construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437783A (en) * | 2013-08-22 | 2013-12-11 | 天津市市政工程设计研究院 | Shallow-buried excavation long-span pilot tunnel arch cover combined construction method |
| CN105697033A (en) * | 2016-04-01 | 2016-06-22 | 长安大学 | Construction method for treating rock mass cavity without formworks in tunneling |
| CN107288665A (en) * | 2017-08-21 | 2017-10-24 | 中国建筑第八工程局有限公司 | The construction method of Station |
| CN108266191A (en) * | 2018-01-17 | 2018-07-10 | 中铁隆工程集团有限公司 | A kind of multiple-arch tunnel optimized construction method |
| CN108952759A (en) * | 2018-06-27 | 2018-12-07 | 昆明理工大学 | A kind of tunnel lining structure and construction method using concrete filled steel tube and superimposed sheet |
| CN110159298A (en) * | 2019-06-06 | 2019-08-23 | 中铁一局集团第二工程有限公司 | A kind of first branch button arch construction method of Underground Subway Station |
-
2019
- 2019-12-05 CN CN201911234934.0A patent/CN111042833A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437783A (en) * | 2013-08-22 | 2013-12-11 | 天津市市政工程设计研究院 | Shallow-buried excavation long-span pilot tunnel arch cover combined construction method |
| CN105697033A (en) * | 2016-04-01 | 2016-06-22 | 长安大学 | Construction method for treating rock mass cavity without formworks in tunneling |
| CN107288665A (en) * | 2017-08-21 | 2017-10-24 | 中国建筑第八工程局有限公司 | The construction method of Station |
| CN108266191A (en) * | 2018-01-17 | 2018-07-10 | 中铁隆工程集团有限公司 | A kind of multiple-arch tunnel optimized construction method |
| CN108952759A (en) * | 2018-06-27 | 2018-12-07 | 昆明理工大学 | A kind of tunnel lining structure and construction method using concrete filled steel tube and superimposed sheet |
| CN110159298A (en) * | 2019-06-06 | 2019-08-23 | 中铁一局集团第二工程有限公司 | A kind of first branch button arch construction method of Underground Subway Station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060062A (en) * | 2021-12-08 | 2022-02-18 | 刁志刚 | Construction method for side hole primary support buckling arch in construction of underground excavated station by using hole-pile method |
| CN114294020A (en) * | 2021-12-31 | 2022-04-08 | 北京市政建设集团有限责任公司 | Side guide hole backfill construction method |
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Application publication date: 20200421 |