CN107725073B - Tunnel construction method based on simple trestle - Google Patents
Tunnel construction method based on simple trestle Download PDFInfo
- Publication number
- CN107725073B CN107725073B CN201711077515.1A CN201711077515A CN107725073B CN 107725073 B CN107725073 B CN 107725073B CN 201711077515 A CN201711077515 A CN 201711077515A CN 107725073 B CN107725073 B CN 107725073B
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- Prior art keywords
- inverted arch
- trestle
- lower step
- excavated
- truss
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/10—Travelling bridges, i.e. roller bridges; Sliding bridges; Rotary cylinder bridges, i.e. rotating about longitudinal axis to invert and raise the road
Abstract
The invention discloses a tunnel construction method based on a simple trestle, which comprises an excavated lower step, wherein one side of the excavated lower step is the lower step to be excavated, the other side of the excavated lower step is a first inverted arch, a first inverted arch filling is arranged above the first inverted arch, a support truss is arranged in the middle of the excavated lower step, a tunnel face is arranged on one side of the upper end of the lower step to be excavated, double-row advanced small guide pipes are connected to the tunnel face and the upper end of a secondary lining, and the lower ends of the double-row advanced small guide pipes are provided with guide pipe primary supports. Compared with the prior art, the invention has the characteristics that the number of spans of the inverted arch trestle structure is increased; the method has the advantages that as the number of spans increases, the construction operation area is increased, so that the inverted arch construction can carry out inter-process line production; the benefit and effect can save the inverted arch construction by nearly half of the operation time.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a tunnel construction method based on a simple trestle.
Background
Most of existing tunnel inverted arch trestle is of a simple structure, a few of tunnel inverted arch trestle adopts a movable formwork form, but the tunnel inverted arch trestle is of a single-span structure, and tunnel inverted arch construction needs to be subjected to the procedures of lower step excavation, bottom cleaning, inverted arch lower portion primary support construction, inverted arch reinforcement binding, inverted arch concrete pouring, inverted arch backfilling and the like. After the lower step is excavated, the inverted arch trestle is started to be used until the inverted arch backfill reaches the design strength, the construction procedures are more during the period, the working face is single, and the line production cannot be formed; the single circulation time is longer, and the utilization ratio of the inverted arch trestle is lower.
Disclosure of Invention
The invention aims to provide a tunnel construction method based on a simple trestle, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a tunnel construction method based on simple and easy landing stage, includes the excavation lower step, the one side of excavation lower step is for waiting to excavate lower step, the opposite side of excavation lower step is first inverted arch, the top of first inverted arch is provided with first inverted arch and fills, the middle part of excavation lower step is provided with the support truss, landing stage I has been set up on support truss's upper end one side, and landing stage I keeps away from support truss's one end and sets up on first inverted arch fills, landing stage II has been set up to support truss's upper end opposite side, landing stage II keeps away from support truss's one end and sets up on waiting to excavate lower step, landing stage I's below is provided with the second construction inverted arch, the top of second construction inverted arch is provided with second inverted arch fills, the below of first inverted arch and second construction inverted arch is provided with the support, landing stage I is kept away from support I's one side and is set up on first inverted arch fills, the side of waiting to excavate on the lower face of support truss, the leading side is provided with the tip of tip is little, the leading side is connected.
Preferably, the support truss is formed by welding and combining a plurality of horizontal and vertical rectangular frames, and a rectangular truss is integrally formed, and the length of the rectangular truss is twice as long as the width of the rectangular truss.
The construction method of the simple multi-span tunnel comprises the following steps:
s1, excavating a lower step;
s2: moving the support truss in the excavated lower step, and erecting a trestle I;
s3: binding inverted arch steel bars;
s4: pouring inverted arch concrete;
s5: pouring inverted arch filling concrete;
s6: erecting a trestle II at the other end of the supporting truss;
s7, clearing the bottom of the lower part of the trestle II;
s8: constructing an inverted arch lower primary support;
s9: and excavating blasting and drilling holes on the lower step.
Compared with the prior art, the invention has the beneficial effects that: the tunnel construction method based on the simple trestle provided by the invention provides a process flow operation space for tunnel inverted arch construction, and breaks through the structural form of the traditional single-span inverted arch trestle; compared with the prior art, the construction method for the inverted arch trestle has the characteristics that the number of spans of the inverted arch trestle structure is increased; the method has the advantages that as the number of spans increases, the construction operation area is increased, so that the inverted arch construction can carry out inter-process line production; the benefit and effect can save the inverted arch construction by nearly half of the operation time.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the structure of the present invention;
FIG. 3 is a schematic view of a support truss according to the present invention.
In the figure: the method comprises the following steps of excavating a lower step 1, excavating the lower step 2 to be excavated, performing primary support 3, performing first inverted arch 4, performing first inverted arch filling 5, performing support truss 6, performing trestle I7, performing trestle II8, performing second construction inverted arch 9, performing second inverted arch filling 10, performing secondary lining 11, performing face 12, performing double-row advanced small guide pipe 13, performing primary support 14 and performing trestle primary support 15.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: a tunnel construction method based on a simple trestle comprises the steps 1, the steps 2 are to be excavated, the steps 1 are to be excavated, the steps 4 are to be excavated, a first inverted arch filling 5 is arranged above the first inverted arch 4, a supporting truss 6 is arranged in the middle of the steps 1, the supporting truss 6 is formed by welding and combining a plurality of rectangular frames horizontally and vertically, a rectangular truss is integrally formed, the length of the rectangular truss is twice as long as the length of the rectangular truss, trestle I7 is arranged on one side of the upper end of the supporting truss 6, trestle I7 is far away from one end of the supporting truss 6 and is erected on the first inverted arch filling 5, trestle II8 is arranged on the steps 2 to be excavated, the lower side of the trestle II8 is far away from one end of the supporting truss 6, a second construction inverted arch 9 is arranged on the inverted arch 9, a second inverted arch 10 is arranged above the supporting arch 9, two-row pipe lining 13 is arranged below the first inverted arch 4 and the second construction inverted arch 9, a small-side lining 11 is arranged on the lower side of the first inverted arch 4, and a small-side of the first-stage 11 is arranged on the lower-side of the supporting truss is far away from the supporting truss 6, and a small-side of the first-side lining 11 is arranged on the lower-side of the supporting truss 12.
The construction method of the simple multi-span tunnel comprises the following steps:
s1, excavating a lower step;
s2: moving the support truss 6 in the excavated lower step 1, and then erecting a trestle I7;
s3: binding inverted arch steel bars;
s4: pouring inverted arch concrete;
s5: pouring inverted arch filling concrete;
s6: erecting a trestle II8 at the other end of the supporting truss 6;
s7, clearing the bottom of the lower part of the trestle II8;
s8: constructing an inverted arch lower primary support;
s9: and excavating blasting and drilling holes on the lower step.
The simple multi-span tunnel provided by the invention provides a process flow operation space for tunnel inverted arch construction, and breaks through the structural form of the traditional single-span inverted arch trestle; compared with the prior art, the construction method for the inverted arch trestle has the characteristics that the number of spans of the inverted arch trestle structure is increased; the method has the advantages that as the number of spans increases, the construction operation area is increased, so that the inverted arch construction can carry out inter-process line production; the benefit and effect can save the inverted arch construction by nearly half of the operation time.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A tunnel construction method based on a simple trestle is characterized by comprising the following steps: the construction method comprises the following steps:
s1, excavating a lower step;
s2: moving the support truss (6) to the middle position in the excavated lower step (1), and then erecting a trestle I (7); one side of the excavated lower step (1) is the lower step (2) to be excavated, the other side of the excavated lower step (1) is a first inverted arch (4), a first inverted arch filling (5) is arranged above the first inverted arch (4), the supporting truss (6) is formed by welding and combining a plurality of horizontal and vertical rectangular frames, and a rectangular truss is integrally formed, and the length of the rectangular truss is twice as long as the width of the rectangular truss; one end of the trestle I (7) far away from the supporting truss (6) is erected on the first inverted arch filling (5), and the other end of the trestle I (7) is lapped on the supporting truss (6);
s3: binding inverted arch steel bars;
s4: a second construction inverted arch (9) is arranged below the trestle I (7);
s5: pouring inverted arch filling concrete to form a second inverted arch filling (10) above a second construction inverted arch (9);
s6: a trestle II (8) is arranged on the other side of the upper end of the supporting truss (6), and one end, far away from the supporting truss (6), of the trestle II (8) is erected on the lower step (2) to be excavated;
s7, clearing the bottom of the lower part of the trestle II (8);
s8: constructing an inverted arch lower primary support;
s9: digging, blasting and drilling holes on the lower steps;
a secondary lining (11) is arranged on one side of the upper end of the first inverted arch filling (5), a tunnel face (12) is arranged on one side of the upper end of the lower step (2) to be excavated, double rows of advanced small guide pipes (13) are connected to the upper ends of the tunnel face (12) and the secondary lining (11), and a guide pipe primary support (14) is arranged at the lower end of the double rows of advanced small guide pipes (13); the inverted arch primary support (3) is arranged below the first inverted arch (4) and the second construction inverted arch (9), and the trestle primary support (15) is arranged below the trestle II (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077515.1A CN107725073B (en) | 2017-11-06 | 2017-11-06 | Tunnel construction method based on simple trestle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077515.1A CN107725073B (en) | 2017-11-06 | 2017-11-06 | Tunnel construction method based on simple trestle |
Publications (2)
| Publication Number | Publication Date |
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| CN107725073A CN107725073A (en) | 2018-02-23 |
| CN107725073B true CN107725073B (en) | 2024-04-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162720A (en) * | 2018-08-24 | 2019-01-08 | 中铁十六局集团第三工程有限公司 | A kind of twin spans freely-supported inverted arch trestle construction method |
| CN109594989B (en) * | 2018-11-21 | 2021-01-08 | 长安大学 | Quick construction method for simultaneously detonating three steps of weak surrounding rock tunnel and double trestles |
| CN110454197B (en) * | 2019-08-23 | 2020-08-07 | 中铁十一局集团第五工程有限公司 | Tunnel inverted arch partition and sub-process streamlined construction method |
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