CN112610240A - Secondary lining construction process for mountain tunnel - Google Patents
Secondary lining construction process for mountain tunnel Download PDFInfo
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- CN112610240A CN112610240A CN202011512232.7A CN202011512232A CN112610240A CN 112610240 A CN112610240 A CN 112610240A CN 202011512232 A CN202011512232 A CN 202011512232A CN 112610240 A CN112610240 A CN 112610240A
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- concrete
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- construction
- tunnel
- lining
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- 238000010276 construction Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000011049 filling Methods 0.000 claims abstract description 15
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000001680 brushing effect Effects 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005406 washing 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- 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
- 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
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
Abstract
The application relates to a secondary lining construction process for a mountain tunnel, which relates to the field of tunnel construction and comprises the following steps: s1: preparation before construction; s2: constructing an inverted arch; s3: filling construction of an inverted arch; s4: constructing lining concrete; the step S4 includes: s41: lining preparation work; s42: positioning a template trolley: driving the template trolley to a construction position, and fixing the template trolley; s43: pouring lining concrete: the template trolley comprises a plurality of layers of pouring windows, when pouring is carried out, pouring sequence from a poured joint to a non-pouring direction is adopted, two sides are simultaneously poured or two sides are alternately poured along the depth direction of the tunnel, and concrete is vibrated while pouring is carried out; s44: removing the mold; s45: and (5) maintaining. The method has the effect of improving the construction quality of the tunnel lining.
Description
Technical Field
The application relates to the field of tunnel construction, in particular to a secondary lining construction process for a mountain tunnel.
Background
The tunnel is usually built in mountain, underwater or underground and the like, and is used for traffic after being built; the tunnel which passes through the mountain or the lower part of the hills for shortening the distance and avoiding large slopes is a mountain tunnel; underwater tunnels passing under a river or sea floor to cross a river or channel; urban tunnels passing through the underground of cities to meet the requirement of railway passing through large cities; among them, mountain tunnels are the most common tunnels.
In the related technology, the secondary lining construction process comprises the following steps: firstly, reinforcing steel bars are installed in the inner wall of the primary lining, and then concrete is sprayed towards the reinforcing steel bars and the inner wall of the hole.
In view of the above-mentioned related art, the inventor believes that there is a defect that after the concrete is solidified, the concrete is easily separated from the inner wall of the primary lining, resulting in a reduction in the quality of the constructed tunnel.
Disclosure of Invention
In order to improve the construction quality of the tunnel lining, the application provides a secondary lining construction process of a mountain tunnel.
The secondary lining construction process for the mountain tunnel adopts the following technical scheme:
a secondary lining construction process of a mountain tunnel comprises the following steps:
s1: preparation before construction;
s2: constructing an inverted arch;
s3: filling construction of an inverted arch;
s4: constructing lining concrete;
the step S4 includes:
s41: lining preparation work;
s42: positioning a template trolley: driving the template trolley to a construction position, and fixing the template trolley;
s43: pouring lining concrete: the template trolley comprises a plurality of layers of pouring windows, when pouring is carried out, pouring sequence from a poured joint to a non-pouring direction is adopted, two sides are simultaneously poured or two sides are alternately poured along the depth direction of the tunnel, and concrete is vibrated while pouring is carried out;
s44: removing the mold;
s45: and (5) maintaining.
By adopting the technical scheme, during construction, firstly inverted arch construction and inverted arch filling construction are carried out, and then secondary lining construction is carried out, when lining construction is carried out, the template trolley is in place and fixed, so that the movement of the template trolley during construction is reduced, after the template trolley is fixed, concrete poured between a template of the template trolley and the inner wall of a primary lining is not easy to flow, the joint degree of the concrete and the inner wall of the primary lining is higher in the solidification process, the concrete is not easy to fall off after solidification, and the tunnel lining construction quality is improved; in addition, in the concrete pouring process, the pouring joint is firstly poured with concrete, and the concrete is firstly contacted with the wall surface of the pouring joint, so that sufficient concrete can be ensured at the joint of the two lining sections, cracks at the pouring joint are reduced, and the tunnel lining quality is improved; moreover, the two sides are poured simultaneously or alternately, so that the pouring height difference of the two sides can be reduced, and the concrete condensation degree difference of the two sides is smaller when the concrete on the two sides is poured to the overlapped section, so that the concrete on the two sides can be condensed integrally, the formation of gaps is reduced, and the tunnel lining construction quality is improved; and finally, pouring and vibrating are carried out simultaneously, so that air bubbles in the concrete can be eliminated, the compactness of the concrete is improved, and the construction quality of the tunnel lining is improved.
Optionally, the step S2 includes:
s21: b, inverted arch construction measurement lofting: arranging a guide point in the tunnel, wherein the elevation of the guide point is consistent with the invert backfilling elevation of the mileage;
s22: excavating the tunnel bottom according to the inverted arch construction measurement lofting to form a base;
s23: cleaning a substrate: removing the virtual slag, silt and sundries on the substrate, and filling the overexcavation part with concrete of the same level as the inverted arch construction;
s24: and pouring concrete to form the inverted arch concrete.
By adopting the technical scheme, during inverted arch construction, firstly, measurement lofting is carried out, guide points are arranged, a base point is provided for subsequent inverted arch construction, construction operation is convenient for operators, then, the tunnel bottom is excavated, and virtual slag, sludge and sundries at the tunnel bottom are cleaned out of the tunnel, so that the cleanliness of the tunnel bottom in the construction process is ensured, impurities are reduced from being mixed into concrete, the hardness of the concrete after the solidification of the tunnel bottom is improved, and the tunnel lining construction quality is improved; the concrete of the same grade is used for backfilling the overexcavation part, so that the overexcavation part and the inverted arch part have the same strength, the compressive strength of the two parts is the same, and the stability of the inverted arch is improved.
Optionally, in S24, the inverted arch concrete needs to be poured once, if continuous pouring cannot be performed due to the fact, and the intermittent time exceeds the initial setting time of the concrete, the joint of the two pours is processed according to the construction joint, and the S3 is performed after the inverted arch concrete is finally set.
Through adopting above-mentioned technical scheme, pour the shaping with the invert once for the setting time of each position of invert differs less, thereby reducible invert appear the crack at the in-process that condenses.
Optionally, in S24, the concrete is vibrated to be dense in the process of pouring the concrete.
Through adopting above-mentioned technical scheme, the in-process that the inverted arch was pour, to concrete while pouring vibration, reduce the bubble in the concrete to improve the firmness after the inverted arch concrete solidifies.
Optionally, in S43, during the vibrating, a vibrating rod is used to vibrate below the arch, and the arch is vibrated in an attached manner.
By adopting the technical scheme, when the part below the arch is vibrated, the vibrating rod is inserted between the template and the inner wall of the primary lining, and the vibrating rod is used for directly vibrating, so that the concrete is fully contacted with the vibrating rod, bubbles are further eliminated, and the compactness of the concrete is improved; the attached type vibration is adopted above the arch part, a vibrator does not need to be stretched into concrete, and the construction operation of the arch part is convenient for operating personnel.
Optionally, the step S41 includes:
s411: laying waterproof materials;
s412: and (6) binding a reinforcing mesh.
By adopting the technical scheme, before the secondary lining construction, the waterproof coiled material is paved on the inner wall of the primary lining firstly, so that rainwater is reduced from flowing into the secondary lining concrete, and the waterproof performance is improved; the secondary lining concrete is mixed with the reinforcing mesh, so that the firmness of the secondary lining concrete can be improved.
Optionally, the S41 further includes:
s413: template brushing release agent: cleaning the surface of the template, which is required to be contacted with the concrete, and brushing a release agent on the surface of the template, which is required to be contacted with the concrete.
Through adopting above-mentioned technical scheme, with the template clean up, reducible in-process impurity of concreting gets into in the concrete to improve the firmness after the concrete solidifies, brush the isolating agent on the template, be convenient for with template and concrete separation.
Optionally, the S1 includes the following steps:
s11: and (3) measurement and lofting of the inner wall of the primary lining: checking whether the size of the primary lining base surface meets the clearance size of the secondary lining, if so, performing the next procedure, and if not, performing chiseling treatment;
s12: repairing the inner wall of the primary lining of the tunnel, and repairing the water leakage and water seepage part.
Through adopting above-mentioned technical scheme, during the operation, measure the tunnel lining inner wall just, if unsatisfied the construction condition, then repair the chisel to it, repair tunnel lining inner wall to required size after, to leaking in the tunnel, the infiltration position is repaired to guarantee the integrality of tunnel lining inner wall, reduce the condition that the tunnel appears leaking.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the template trolley is fixed, so that the deviation of the template trolley in the construction process is reduced, the flow of concrete in the solidification process is reduced, the connection of the inner wall of the concrete primary lining is firmer, and the quality of tunnel lining is improved;
2. the construction operation of the operators is facilitated by arranging the guide and release points;
3. through vibrating the concrete in the concrete pouring process, the firmness of the solidified concrete is improved.
Detailed Description
The embodiment of the application discloses a secondary lining construction process for a mountain tunnel. A secondary lining construction process of a mountain tunnel comprises the following steps:
s1: preparation before construction; s1 includes the steps of:
s11: and (3) measurement and lofting of the inner wall of the primary lining: checking whether the size of the primary lining base surface meets the clearance size of the secondary lining, if so, performing the next procedure, and if not, performing chiseling treatment;
and checking the inner wall of the primary lining base surface, if the primary lining base surface has a bulge and other parts which invade and limit the clearance size of the secondary lining, cutting and polishing the bulge and other parts, polishing the bulge until the bulge meets the requirement of the clearance size of the secondary lining, and performing the next step after the inner wall of the primary lining base surface meets the requirement of the clearance size of the secondary lining.
S12: repairing the inner wall of the primary lining of the tunnel, and repairing the water leakage and water seepage part;
the water leakage and water seepage positions of the inner wall of the primary lining of the tunnel are smoothed by waterproof putty, so that the waterproof capability of the primary lining base surface is improved, and the drying and cleaning of the inner wall of the primary lining of the tunnel are ensured.
S2: constructing an inverted arch; s2 includes the steps of:
s21: b, inverted arch construction measurement lofting: arranging a guide point in the tunnel, wherein the elevation of the guide point is consistent with the invert backfilling elevation of the mileage;
and arranging guide points at the side walls of two sides in the tunnel, painting the guide points to facilitate the distinguishing of workers during construction, wherein the horizontal interval between every two adjacent guide points is 5m, and the elevation of each guide point is consistent with that of the changed-mileage inverted arch backfill construction.
S22: excavating the tunnel bottom according to the inverted arch construction measurement lofting to form a base;
and (4) excavating the tunnel bottom after the guide points are set, wherein the excavation outline and the bottom elevation need to meet the design requirements.
S23: cleaning a substrate: removing the virtual slag, silt and sundries on the substrate, and filling the overexcavation part with concrete of the same level as the inverted arch construction;
after the substrate is formed, washing the base surface of the substrate by adopting high-pressure air and water so as to clean the virtual slag, sludge and other impurities of the substrate out of the tunnel; and after the substrate is cleaned, if the overexcavation part exists on the substrate, pouring concrete on the overexcavation part, wherein the concrete level of pouring is the same as that of concrete used for filling the subsequent inverted arch.
S24: pouring concrete to form inverted arch concrete;
after the substrate is treated, an inverted arch template is built on the substrate, inverted arch concrete is poured, and in the process of pouring the inverted arch concrete, a vibrating rod is inserted into the inverted arch concrete poured to the substrate for vibrating so as to eliminate air bubbles in the inverted arch concrete; the inverted arch concrete is poured and formed at one time; if continuous pouring cannot be carried out due to reasons and the clearance time exceeds the initial setting time of the concrete, treating the joint of the two times of pouring according to the construction joint; in order to facilitate the inverted arch concrete pouring and not influence the vehicle passing, a trestle platform is erected, one end of the trestle platform extends to the upper part of the substrate, and then the inverted arch concrete pouring is carried out; during pouring, the concrete is intensively stirred outside the tunnel by a stirring station and then is conveyed into the hole by a stirring truck for pouring.
S3: filling construction of an inverted arch;
when the inverted arch is filled, filling concrete is poured, inverted arch construction and inverted arch filling construction cannot be carried out simultaneously, filling concrete can be poured after inverted arch concrete is finally solidified, pedestrians are allowed to pass through the inverted arch after the filling concrete strength reaches 5MPa, and vehicles are allowed to pass through the inverted arch after the filling concrete reaches 100% of the design strength; in the inverted arch filling construction, the concrete is transported by the trestle platform in S2.
S4: constructing lining concrete; s4 includes the steps of:
s41: lining preparation work; s41 includes the steps of:
s411: laying waterproof materials on the inner wall of the primary lining;
fixing the waterproof coiled material and the inner wall of the primary lining, checking the waterproofness of the spliced part of the waterproof coiled material, repairing if the waterproofness does not meet the requirement, and performing the next procedure if the waterproofness meets the requirement.
S412: binding a reinforcing mesh;
and binding a reinforcing mesh in the hole according to the shape of the secondary lining, and fixing the reinforcing mesh and the inner wall of the primary lining by using expansion screws.
S413: coating a release agent on the template;
the method comprises the steps of cleaning the surface, needing to be contacted with concrete, of the template, and brushing a concrete isolating agent on the surface, needing to be contacted with the concrete, of the template, so that subsequent demolding of the concrete and the template is facilitated.
S42: positioning a template trolley;
the method comprises the steps of paving a track in a hole, driving a template trolley to a construction position, fixing the template trolley, and fixing wheels and the track of the template trolley by using bolts when the template trolley is fixed so as to prevent the template trolley from sliding on the track.
S43: pouring lining concrete;
the template trolley comprises 3 layers of pouring windows, when pouring is carried out, a pouring sequence from bottom to top from a poured joint to a non-pouring direction is adopted, and pouring is carried out simultaneously or alternately along two sides of the depth direction of the tunnel, the free-falling height of concrete pouring cannot exceed 2m, when the free-falling height exceeds 2m, a hose is communicated with a pouring outlet of the template trolley and extends into a pouring cavity, and the problem of overhigh pouring height is solved; in the pouring process, when concrete is poured to a layer of pouring window, the pouring window is plugged by using a plugging piece, so that the concrete is prevented from flowing out of the pouring window; when the position below the arch part is poured, a vibrating rod is stretched into a pouring cavity for vibrating so as to eliminate air bubbles in concrete; when the concrete of the arch part is poured, the attached vibrator is installed on the template through screws to vibrate the template, so that the concrete of the arch part is vibrated.
S44: removing the mold;
after the lining concrete reaches the stripping strength, recovering the template on the template trolley to separate the template from the lining concrete, maintaining the template trolley, cleaning the template, and finishing and polishing the deformation and rough surface of the template; and then the next section of construction operation is carried out.
S45: maintaining;
and after the mold is removed, carrying out watering maintenance on the lining concrete.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A secondary lining construction process of a mountain tunnel is characterized in that: the method comprises the following steps:
s1: preparation before construction;
s2: constructing an inverted arch;
s3: filling construction of an inverted arch;
s4: constructing lining concrete;
the step S4 includes:
s41: lining preparation work;
s42: positioning a template trolley: driving the template trolley to a construction position, and fixing the template trolley;
s43: pouring lining concrete: the template trolley comprises a plurality of layers of pouring windows, when pouring is carried out, pouring sequence from a poured joint to a non-pouring direction is adopted, two sides are simultaneously poured or two sides are alternately poured along the depth direction of the tunnel, and concrete is vibrated while pouring is carried out;
s44: removing the mold;
s45: and (5) maintaining.
2. The secondary lining construction process for mountain tunnels according to claim 1, wherein: the step S2 includes:
s21: b, inverted arch construction measurement lofting: arranging a guide point in the tunnel, wherein the elevation of the guide point is consistent with the invert backfilling elevation of the mileage;
s22: excavating the tunnel bottom according to the inverted arch construction measurement lofting to form a base;
s23: cleaning a substrate: removing the virtual slag, silt and sundries on the substrate, and filling the overexcavation part with concrete of the same level as the inverted arch construction;
s24: and pouring concrete to form the inverted arch concrete.
3. The secondary lining construction process of the mountain tunnel according to claim 2, wherein: in the step S24, the inverted arch concrete needs to be cast once, if continuous casting cannot be performed due to the fact, and the intermittent time exceeds the initial setting time of the concrete, the joint of the two times of casting is processed according to the construction joint, and the step S3 is performed after the inverted arch concrete is finally set.
4. The secondary lining construction process of the mountain tunnel according to claim 2, wherein: and S24, compacting the concrete by vibration in the process of pouring the concrete.
5. The secondary lining construction process for mountain tunnels according to claim 1, wherein: in S43, the arch is vibrated by a vibrating rod and the arch is vibrated by an attaching method.
6. The secondary lining construction process for mountain tunnels according to claim 1, wherein: the step S41 includes:
s411: laying waterproof materials;
s412: and (6) binding a reinforcing mesh.
7. The secondary lining construction process for mountain tunnels according to claim 1, wherein: the S41 further includes:
s413: template brushing release agent: cleaning the surface of the template, which is required to be contacted with the concrete, and brushing a release agent on the surface of the template, which is required to be contacted with the concrete.
8. The secondary lining construction process for mountain tunnels according to claim 1, wherein: the S1 includes the following steps:
s11: and (3) measurement and lofting of the inner wall of the primary lining: checking whether the size of the primary lining base surface meets the clearance size of the secondary lining, if so, performing the next procedure, and if not, performing chiseling treatment;
s12: repairing the inner wall of the primary lining of the tunnel, and repairing the water leakage and water seepage part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011512232.7A CN112610240A (en) | 2020-12-19 | 2020-12-19 | Secondary lining construction process for mountain tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011512232.7A CN112610240A (en) | 2020-12-19 | 2020-12-19 | Secondary lining construction process for mountain tunnel |
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| Publication Number | Publication Date |
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| CN112610240A true CN112610240A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011512232.7A Pending CN112610240A (en) | 2020-12-19 | 2020-12-19 | Secondary lining construction process for mountain tunnel |
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| CN (1) | CN112610240A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738402A (en) * | 2021-09-18 | 2021-12-03 | 湖北祖德水利水电工程有限公司 | Support system and method for hydraulic tunnel construction |
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2020
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| CN104612698A (en) * | 2015-01-24 | 2015-05-13 | 杭州天恒投资建设管理有限公司 | Method for constructing upper step middle partition wall of shallow-buried excavation tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113738402A (en) * | 2021-09-18 | 2021-12-03 | 湖北祖德水利水电工程有限公司 | Support system and method for hydraulic tunnel construction |
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Application publication date: 20210406 |