CN111734453A - Construction method of self-propelled inverted arch arc-shaped formwork movable trestle - Google Patents
Construction method of self-propelled inverted arch arc-shaped formwork movable trestle Download PDFInfo
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- CN111734453A CN111734453A CN202010500020.0A CN202010500020A CN111734453A CN 111734453 A CN111734453 A CN 111734453A CN 202010500020 A CN202010500020 A CN 202010500020A CN 111734453 A CN111734453 A CN 111734453A
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- inverted arch
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- 238000010276 construction Methods 0.000 title claims abstract description 65
- 238000009415 formwork Methods 0.000 title claims description 5
- 238000009412 basement excavation Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 239000004746 geotextile Substances 0.000 claims abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 description 7
- 238000007689 inspection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Classifications
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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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
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (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 belongs to the field of highway, railway tunnel and underground engineering construction, and particularly relates to a construction method of a self-propelled inverted arch arc-shaped template movable trestle. S100, dividing a trestle of N meters into two operation sections of N/2, namely a first section concrete construction operation area and a second section inverted arch excavation operation area; s200, when the tunnel face is measured and lofted, placing a pair of inverted arch excavation control points on each N/4 designed elevation of the left side wall and the right side wall for 1 m; s300, excavating the inverted arch in a segmented and whole manner in two sections, and performing binding construction on geotextile, waterproof boards, transverse drainage pipes, longitudinal drainage pipes and inverted arch reinforcing steel bars on the N/2m inverted arch which is excavated and supported in the S400-two sections; s500, positioning inverted arch arc-shaped template longitudinal beams on two sides of the section II according to the measurement control points; and S600, after the two sections of inverted arch concrete meet the demolding condition, waiting for the inverted arch concrete to reach the filling construction condition after demolding, and carrying out next cycle construction when the one section of filled concrete reaches the traffic condition.
Description
Technical Field
The invention belongs to the field of highway, railway tunnel and underground engineering construction, and particularly relates to a construction method of a self-propelled inverted arch arc-shaped template movable trestle.
Background
In recent years, more and more foundation construction projects are invested in and built by the country, particularly, railways and highways are taken as main parts, in the design and construction of the railways and the highways, the traditional tunnel construction is rapidly replaced by tunnel construction mechanization, a self-propelled movable trestle in inverted arch construction replaces a traditional simple trestle, and an inverted arch arc-shaped template is matched with the movable trestle for use.
Aiming at the mechanical configuration of the inverted arch, how to meet the increasingly popular requirements of mechanical and rapid construction of the tunnel face, the problems of common quality problems of the inverted arch water stop, the inverted arch, filling of half-width or integral pouring and the like in construction are important problems influencing the quality of the inverted arch. Aiming at weak surrounding rock and inverted arch subsection short-distance excavation construction, the construction speed is low, the number of parting joints is large, and the requirement of the safe distance is more difficult to meet.
Disclosure of Invention
The invention provides a construction method of a self-propelled inverted arch arc-shaped formwork movable trestle, which aims to solve the problems.
The invention adopts the following technical scheme: a construction method of a self-propelled inverted arch arc-shaped template movable trestle comprises the following steps.
S100, dividing the trestle with the length of N m into two operation sections with the length of N/2, wherein the two operation sections are respectively a first section concrete construction operation area and a second section inverted arch excavation operation area.
S200, when the tunnel face is measured and lofted, a pair of inverted arch excavation control points are placed on each N/4 designed elevation of the left side wall and the right side wall for 1 m.
S300, excavating the inverted arch section by section in two sections, wherein each time the inverted arch section is excavated by N/4m, the trestle moves by N/4m after the excavation is finished, performing inverted arch primary support construction after the trestle is in place with an inverted arch primary support, and performing next N/4m inverted arch excavation support construction and trestle forward movement by N/4m after the N/4m inverted arch excavation support is finished; and (3) carrying out inverted arch filling template installation, positioning, acceptance and concrete construction on the first section while carrying out two N/4m excavation supporting construction on the second section.
S400, binding construction of geotextile, a waterproof plate, a transverse drain pipe, a longitudinal drain pipe and an inverted arch steel bar is carried out on an N/2m inverted arch which is excavated and supported in two sections, positioning steel bars are installed according to field measurement data before the steel bars are installed, the positions and the heights of inner-layer steel bars, outer-layer steel bars and longitudinal water stops are accurately positioned, the intervals of the steel bars are controlled by adopting clamps for side wall steel bar binding, and meanwhile, installation, positioning, acceptance inspection and concrete construction of a central ditch template are carried out in one section.
S500, positioning longitudinal beams of the inverted arch arc templates on two sides according to the measurement control points in the second section, installing inverted arch end templates, and drawing the inverted arch arc templates through an electric hoist to accurately position; after the template is positioned, checked and accepted, the water stop clamp and the wire grip are used for installing the longitudinal water stop; carrying out whole inverted arch concrete construction after process acceptance, carrying out inverted arch concrete pouring on the middle and the two sides, and vibrating concrete at the arc-shaped template parts on the two sides through a window reserved by the template; meanwhile, one section is subjected to central ditch prefabricated cover plate installation construction, cover plate top filling layer construction and concrete strength waiting.
And S600, after the two sections of inverted arch concrete meet the demolding condition, demolding the inverted arch arc-shaped template through traction of an electric hoist, waiting for the inverted arch concrete to reach the filling construction condition after demolding, and carrying out next cycle construction when the one section of filled concrete reaches the traffic condition.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention is divided into two sections and six procedures for flow production, thereby reducing the waiting time of procedure conversion and accelerating the construction progress.
(2) The inverted arch is cast in a whole range in layers, half of construction is carried out at one time, longitudinal construction joints are not reserved, transverse parting joints are reduced, and construction quality of the inverted arch is guaranteed.
(3) The potential safety hazard of cross construction is reduced, and the construction efficiency of the inverted arch is improved.
Drawings
FIG. 1 is a flow chart of the construction method of the present invention.
Detailed Description
S100, dividing a 24m trestle into two 12m operation sections, namely a two-section inverted arch excavation operation area and a one-section concrete construction operation area;
s200, during tunnel face measurement lofting, a pair of inverted arch excavation control points are placed 1m above the designed elevation every 6m of the left side wall and the right side wall, and inverted arch excavation technology bottom crossing is compiled.
S300, excavating the inverted arch section by section in the two sections, wherein 6m is excavated each time, and the trestle moves forward by 6m after the excavation is finished. And performing inverted arch primary support construction after the trestle with the inverted arch primary support is in place, and performing next 6m inverted arch excavation support construction and trestle forward movement by 6m after 6m inverted arch excavation support is completed. And (3) installing, positioning, checking and accepting an inverted arch filling template of one section and constructing concrete while performing two 6m excavation supporting construction of the two sections.
And S400, performing geotextile, waterproof board, transverse drain pipe, longitudinal drain pipe and inverted arch reinforcement binding construction on the 12m inverted arch which is excavated and supported in the two sections, installing positioning reinforcements according to field measurement data before the reinforcements are installed, accurately positioning the positions and the heights of the inner layer reinforcements, the outer layer reinforcements and the longitudinal water stop, controlling the reinforcement interval by adopting a clamp for side wall reinforcement binding, preventing the water stop from collapsing by adopting a U-shaped clamp, straightening the linear shape and centering the position. Meanwhile, a section is subjected to central ditch template installation, positioning, acceptance inspection and concrete construction.
S500, positioning longitudinal beams of the inverted arch arc templates on two sides according to the measurement control points in the second section, installing inverted arch end templates, and drawing the inverted arch arc templates through an electric hoist to accurately position; after the template is positioned, checked and accepted, the water stop clamp and the wire grip are used for installing the longitudinal water stop; and carrying out whole inverted arch concrete construction after process acceptance, carrying out inverted arch concrete pouring on the middle part and the two sides, and carrying out concrete vibration on the arc-shaped template parts on the two sides through a window reserved in the template. Meanwhile, one section is subjected to central ditch prefabricated cover plate installation construction, cover plate top filling layer construction and concrete strength waiting.
S600, enabling the inverted arch concrete in the second section to meet the demolding condition, demolding the inverted arch arc-shaped template through traction of an electric hoist, waiting for the inverted arch concrete to reach the filling construction condition after demolding, enabling the concrete filled in the first section to reach the vehicle passing condition, and performing next cycle construction.
Claims (3)
1. A construction method of a self-propelled inverted arch arc-shaped template movable trestle is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s100, dividing a trestle with the length of N m into two operation sections with the length of N/2, wherein the two operation sections are a first section concrete construction operation area and a second section inverted arch excavation operation area respectively;
s200, when the tunnel face is measured and lofted, placing a pair of inverted arch excavation control points on each N/4 designed elevation of the left side wall and the right side wall for 1 m;
s300, excavating the inverted arch in sections in the two sections in a whole width,
s400, binding construction of geotextile, waterproof boards, transverse drainage pipes, longitudinal drainage pipes and inverted arch reinforcing steel bars is carried out on the N/2m inverted arch which is excavated and supported in the second section;
s500, positioning longitudinal beams of the inverted arch arc templates on two sides according to the measurement control points in the second section, installing inverted arch end templates, and drawing the inverted arch arc templates through an electric hoist to accurately position; after the template is positioned, checked and accepted, the water stop clamp and the wire grip are used for installing the longitudinal water stop; carrying out whole inverted arch concrete construction after process acceptance, carrying out inverted arch concrete pouring on the middle and the two sides, and vibrating concrete at the arc-shaped template parts on the two sides through a window reserved by the template; meanwhile, mounting construction of a prefabricated cover plate of the central ditch, construction of a filling layer on the top of the cover plate and concrete strength waiting are carried out on one section;
and S600, after the two sections of inverted arch concrete meet the demolding condition, demolding the inverted arch arc-shaped template through traction of an electric hoist, waiting for the inverted arch concrete to reach the filling construction condition after demolding, and carrying out next cycle construction when the one section of filled concrete reaches the traffic condition.
2. The construction method of the self-propelled inverted arch arc-shaped formwork mobile trestle according to claim 1, and is characterized in that: the step S300 adopts the following method that every time N/4m is excavated, the trestle moves forward by N/4m after the excavation is finished, the primary inverted arch support construction is carried out after the trestle with the primary inverted arch support is in place, and the next N/4m inverted arch excavation support construction and the trestle moves forward by N/4m are carried out after the N/4m inverted arch excavation support is finished; and (3) carrying out inverted arch filling template installation, positioning, acceptance and concrete construction on the first section while carrying out two N/4m excavation supporting construction on the second section.
3. The construction method of the self-propelled inverted arch arc-shaped formwork mobile trestle according to claim 1, and is characterized in that: and S400, installing positioning steel bars according to field measurement data before the steel bars are installed, accurately positioning the positions and the heights of the inner-layer steel bars, the outer-layer steel bars and the longitudinal water stop belts, controlling the distance between the steel bars by using clamps for side wall steel bar binding, and simultaneously installing, positioning, checking and accepting a central ditch template and constructing concrete in one section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010500020.0A CN111734453A (en) | 2020-06-04 | 2020-06-04 | Construction method of self-propelled inverted arch arc-shaped formwork movable trestle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010500020.0A CN111734453A (en) | 2020-06-04 | 2020-06-04 | Construction method of self-propelled inverted arch arc-shaped formwork movable trestle |
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| Publication Number | Publication Date |
|---|---|
| CN111734453A true CN111734453A (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010500020.0A Pending CN111734453A (en) | 2020-06-04 | 2020-06-04 | Construction method of self-propelled inverted arch arc-shaped formwork movable trestle |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202017493U (en) * | 2011-03-10 | 2011-10-26 | 中铁二局股份有限公司 | Construction equipment for inverted arch of high-speed railway double-track tunnel |
| CN102635369A (en) * | 2012-03-20 | 2012-08-15 | 中铁十二局集团有限公司 | Construction method for integrally pouring inverted arch concrete by matching trestle with top formwork |
| 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 |
| CN110454197A (en) * | 2019-08-23 | 2019-11-15 | 中铁十一局集团第五工程有限公司 | Tunnel inverted arch subregion operation break-down streamlined construction method |
-
2020
- 2020-06-04 CN CN202010500020.0A patent/CN111734453A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202017493U (en) * | 2011-03-10 | 2011-10-26 | 中铁二局股份有限公司 | Construction equipment for inverted arch of high-speed railway double-track tunnel |
| CN102635369A (en) * | 2012-03-20 | 2012-08-15 | 中铁十二局集团有限公司 | Construction method for integrally pouring inverted arch concrete by matching trestle with top formwork |
| 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 |
| CN110454197A (en) * | 2019-08-23 | 2019-11-15 | 中铁十一局集团第五工程有限公司 | Tunnel inverted arch subregion operation break-down streamlined construction method |
Non-Patent Citations (1)
| Title |
|---|
| 薛强: "单线隧道24m仰拱栈桥施工技术研究", 《交通科技》 * |
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Application publication date: 20201002 |