CN111139863B - Waterproof construction method for open cut half reverse construction method tunnel surrounding purlin node - Google Patents
Waterproof construction method for open cut half reverse construction method tunnel surrounding purlin node Download PDFInfo
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- CN111139863B CN111139863B CN201911421535.5A CN201911421535A CN111139863B CN 111139863 B CN111139863 B CN 111139863B CN 201911421535 A CN201911421535 A CN 201911421535A CN 111139863 B CN111139863 B CN 111139863B
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- purlin
- construction method
- waterproof
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- enclosure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a waterproof construction method for an open cut semi-reverse construction method tunnel surrounding purlin node, which comprises the steps of firstly constructing a surrounding structure before excavation of a foundation pit, cutting a tripod under the bottom of the surrounding purlin, and then paving a first waterproof coiled material; constructing an enclosing purlin and a support connected with the enclosing purlin, and continuously excavating a foundation pit downwards after the construction of the enclosing purlin is completed; at the construction stage, constructing a first plain concrete and paving a second waterproof coiled material; constructing a first lining wall structure and correspondingly constructing second plain concrete; and paving a third waterproof coiled material, and constructing a second lining wall structure at a position above the enclosing purlin, which corresponds to the first lining wall. The full-package waterproof construction method for the purlin node of the open cut half reverse construction method tunnel can enable the connection between the purlin and the enclosure structure to be firm, meanwhile, waterproof coiled materials are prevented from being broken through by connecting reinforcing steel bars, and waterproof effect is improved.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a waterproof construction method for surrounding purlin nodes of an open cut half reverse construction method tunnel, and particularly relates to a full-package waterproof construction method for surrounding purlin nodes.
Background
Currently, tunnels are becoming more and more common with the development of urban underground roads. Existing open-cut tunnel engineering has forward, reverse and half reverse methods.
The semi-reverse construction method can utilize the enclosing purlin as a permanent structure, and the enclosing purlin is disassembled after being supported, so that the manufacturing cost is saved, and the construction safety is ensured. However, the connection between the enclosing purlin and the enclosing structure of the semi-reverse construction method breaks the integrity of the waterproof, and the waterproof effect is not ideal all the time. Therefore, how to solve the waterproof problem of the surrounding purlin node of the open cut half reverse construction method tunnel in the prior art becomes the subject of urgent research.
Disclosure of Invention
The invention aims to provide an improved waterproof construction method for an open cut semi-reverse construction method tunnel surrounding purlin node, which is used for enabling the surrounding purlin and a surrounding structure to be firmly connected, arranging waterproof coiled materials at different points and improving waterproof effect.
In order to achieve the above object, the technical scheme of the present invention is as follows: a waterproof construction method for an open cut semi-reverse construction method tunnel surrounding purlin node is characterized by comprising the following steps: the construction method comprises the following steps: a. before the foundation pit is excavated, firstly constructing an enclosure structure, when the foundation pit is excavated to the bottom of the enclosure purlin, cutting and constructing a tripod under the bottom of the enclosure purlin, and then paving a first waterproof coiled material along the side edge of the enclosure purlin; b. constructing an enclosing purlin and a support connected with the enclosing purlin, and continuously excavating a foundation pit downwards after the construction of the enclosing purlin is completed; c. a construction stage, namely constructing a first concrete on one side, close to the enclosure structure, below the enclosure purlin, cutting off the tripod, and paving a second waterproof coiled material below the enclosure purlin, namely, clinging to the side part of the first concrete; d. a first lining wall structure is constructed under the enclosing purlin in a manner of being clung to a second waterproof coiled material, and a second plain concrete is constructed at a position above the enclosing purlin corresponding to the first plain concrete; e. and paving a third waterproof coiled material above the enclosing purlin, namely clinging to the side part of the second, and constructing a second lining wall structure above the enclosing purlin at a position corresponding to the first lining wall.
Preferably, in the step a, vertical longitudinal steel bars are arranged in the enclosure structure, the tripod is welded and fixed with the longitudinal steel bars and used for jacking the enclosure purlin, and the tripod is made of a steel structure.
Further, the enclosing purlin is welded with longitudinal steel bars of the enclosure structure by adopting hanging ribs, the top surface and the bottom surface of the enclosing purlin are respectively protruded towards the first lining wall and the second lining wall and extend by 200-300 mm, and water is stopped by arranging steel plate water stops between the top surface and the bottom surface of the enclosing purlin and the first lining wall and the second lining wall.
Further, the first plain concrete is arranged between the first lining wall and the enclosure structure, the second plain concrete is arranged between the second lining wall and the enclosure structure, and the first plain concrete and the second plain concrete are self-waterproof concrete structures.
Further, the first waterproof coiled material is arranged close to the side edge of the enclosure structure along the enclosure purlin, and two ends of the first waterproof coiled material are terminated at the protruding parts of the top surface and the bottom surface of the enclosure purlin.
Compared with the prior art, the technical scheme of the invention comprises a plurality of improvements in detail besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. according to the improved scheme, the enclosing purlin is welded and connected with the longitudinal steel bars of the enclosing structure through the triangular frames arranged above the enclosing purlin and below the enclosing purlin, so that the enclosing purlin and the triangular frames are firmly connected, and the stability of the structure is ensured;
2. in the technical scheme of the invention, the first lining wall and the first plain concrete below the enclosing purlin are arranged above the enclosing purlin, the corresponding second lining wall and second plain concrete are arranged between the lining wall and the plain concrete and the side part of the enclosing purlin is paved with waterproof coiled materials in sections, so that the waterproof coiled materials are prevented from being penetrated by connecting reinforcing steel bars, and the waterproof effect is improved;
3. according to the technical scheme, the protrusions on the top surface and the bottom surface of the enclosing purlin are 200-300 mm, so that the arrangement of water stop of the steel plate water stop belt is facilitated, the lap joint effect of the waterproof coiled material can be better ensured, and the waterproof effect is improved.
4. The invention has reasonable and simple structural layout, easy construction, good effect and convenient popularization and utilization.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Reference numerals:
the waterproof construction comprises a 1 enclosing structure, a 2 enclosing purlin, a 3 tripod, a 4 first waterproof roll, a 5 second waterproof roll, a 6 third waterproof roll, an 8 steel plate water stop, a 9 first lining wall structure and a 10 second lining wall structure;
11 first plain concrete, 12 second plain concrete, 13 hanging bars and 14 longitudinal steel bars.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
The invention provides a waterproof construction method for an open cut half reverse construction method tunnel surrounding purlin node, and particularly relates to fig. 1, wherein the construction method comprises the following steps: a. before the foundation pit is excavated, firstly constructing an enclosure structure, when the foundation pit is excavated to the bottom of the enclosure purlin, cutting and constructing a tripod under the bottom of the enclosure purlin, and then paving a first waterproof coiled material along the side edge of the enclosure purlin; b. constructing an enclosing purlin and a support connected with the enclosing purlin, and continuously excavating a foundation pit downwards after the construction of the enclosing purlin is completed; c. a construction stage, namely constructing a first concrete on one side, close to the enclosure structure, below the enclosure purlin, cutting off the tripod, and paving a second waterproof coiled material below the enclosure purlin, namely, clinging to the side part of the first concrete; d. a first lining wall structure is constructed under the enclosing purlin in a manner of being clung to a second waterproof coiled material, and a second plain concrete is constructed at a position above the enclosing purlin corresponding to the first plain concrete; e. and paving a third waterproof coiled material above the enclosing purlin, namely clinging to the side part of the second concrete, and constructing a second lining wall structure above the enclosing purlin at a position corresponding to the first lining wall.
In implementation, the open cut half reverse construction method for the full-package waterproof construction of the tunnel purlin node can enable the connection between the purlin and the enclosure structure to be firm, meanwhile, waterproof coiled materials are prevented from being broken through by connecting reinforcing steel bars, and waterproof effect is improved.
In one embodiment, the method for constructing the full-package waterproof construction of the surrounding purlin node of the open-cut half reverse construction method tunnel comprises the following construction steps:
a. constructing an enclosure structure, in the excavation stage, after a foundation pit is excavated to the bottom of an enclosure purlin, cutting and constructing a tripod, paving a first waterproof coiled material at the position of the enclosure purlin, wherein vertical longitudinal steel bars are arranged in the enclosure structure, the tripod is welded and fixed with the longitudinal steel bars, the tripod is used for jacking the enclosure purlin, and the tripod is made of a steel structure; the first waterproof coiled material is arranged close to the side edge of the enclosure structure along the enclosure purlin, and two ends of the first waterproof coiled material are terminated at the protruding parts of the top surface and the bottom surface of the enclosure purlin;
b. constructing an enclosing purlin and a support, and continuously excavating a foundation pit downwards;
c. then in the construction stage, constructing a first plain concrete below the enclosing purlin, cutting off the tripod, paving a second waterproof coiled material below the enclosing purlin, pouring the first plain concrete and part of the tripod together, and setting the cut tripod outside the first plain concrete; before the second waterproof coiled material is paved, the cut tripod is smeared with cement mortar, so that the tripod is prevented from damaging the waterproof coiled material;
d. a lining wall structure is arranged below the enclosing purlin Shidi, and a second concrete is constructed above the enclosing purlin;
e. and paving a third waterproof coiled material above the enclosing purlin, and simultaneously, cutting a hanging rib between the enclosing purlin and the enclosing structure before paving the third waterproof coiled material in a Shidi lining wall structure above the enclosing purlin.
Specifically, the enclosing purlin is welded with the longitudinal steel bars of the enclosing structure by adopting hanging bars, and the lower parts of the hanging bars are not welded with the longitudinal steel bars of the enclosing structure. The top surface and the bottom surface of the enclosing purlin are respectively protruded towards the first lining wall and the second lining wall and extend for 200-300 mm, and a steel plate water stop belt is arranged between the top surface and the bottom surface of the enclosing purlin and the first lining wall and the second lining wall. The top surface and the bottom surface of the enclosing purlin are provided with steel plate water stops and water stops between the first lining wall and the second lining wall. The first concrete is arranged between the first lining wall and the enclosure structure, the second concrete is arranged between the second lining wall and the enclosure structure, and the first concrete and the second concrete are self-waterproof concrete structures.
The triangular frame comprises a frame body and a group of parallel connecting rods, wherein the frame body is an isosceles right triangle, the connecting rods are arranged on the frame body, the hypotenuse of the triangular frame body extends upwards and forms a point extension section which can be cut off at the bottom of the enclosing purlin, one side right-angle edge of the triangular frame body is fixedly connected with a longitudinal reinforcing steel bar, one end of each connecting rod is fixedly connected with the hypotenuse of the frame body, the other end of each connecting rod is fixedly connected with the right-angle edge of the triangular frame body or the bottom of the enclosing purlin, and the distance between every two adjacent connecting rods is 10-25cm.
In another specific embodiment, the building enclosure 1 is constructed before the foundation pit is excavated; in the excavation stage, after the foundation pit is excavated to the bottom of the enclosing purlin 2, a tripod 3 is cut and made; paving a first waterproof coiled material 4 at the side surface of the enclosing purlin 2; constructing an enclosing purlin 2 and a support 15, and continuously excavating a foundation pit downwards; a construction stage, namely constructing a first plain concrete 11 below the enclosing purlin 2; cutting off the tripod 3; paving a second waterproof coiled material 5 below the enclosing purlin 2; a lining wall structure 9 below the purlin 2 Shidi; constructing a second plain concrete 12 above the enclosing purlin 2; a third waterproof coiled material 6 is paved above the enclosing purlin 2; and Shidi the lining wall structure 10 is arranged above the enclosing purlin 2. The second waterproof coiled material and the third waterproof coiled material are lapped with the first waterproof coiled material at the raised positions of the top surface and the bottom surface of the enclosing purlin, and the lapping width is more than or equal to 100mm.
The tripod 3 is welded and fixed with the longitudinal steel bars 14 of the enclosure structure 1, the tripod 3 supports the enclosure purlin 2, and the tripod adopts a steel structure.
The enclosing purlin 2 is of a permanent structure, a hanging rib 13 is welded with a longitudinal steel bar 14 of the enclosing structure 1, a part connected with the lining wall 9 and the lining wall 10 protrudes 200-300 mm, and a steel plate water stop belt 8 is adopted between the lining wall 9 and the lining wall 10 for stopping water.
The first concrete 11 is positioned between the first lining wall 9 and the enclosure structure 1, and the second concrete 12 is positioned between the second lining wall 10 and the enclosure structure 1 and is self-waterproof concrete.
The first waterproof coiled material 4 at the position of the enclosing purlin 2 is adhered to the enclosing purlin 2, and two ends of the first waterproof coiled material are terminated at the protruding parts of the enclosing purlin 2.
The first waterproof coiled material 4, the second waterproof coiled material 5 and the third waterproof coiled material 6 are high-density polyethylene (HDPE) waterproof coiled materials, and the lap joint width is more than or equal to 100mm.
The first plain concrete 11 and the tripod 3 are poured together, and the cut tripod 3 is a part except the first plain concrete 11.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (9)
1. A waterproof construction method for an open cut semi-reverse construction method tunnel surrounding purlin node is characterized by comprising the following steps: the construction method comprises the following steps: a. before the foundation pit is excavated, firstly constructing an enclosure structure, when the foundation pit is excavated to the bottom of the enclosure purlin, cutting and constructing a tripod under the bottom of the enclosure purlin, and then paving a first waterproof coiled material along the side edge of the enclosure purlin; b. constructing an enclosing purlin and a support connected with the enclosing purlin, and continuously excavating a foundation pit downwards after the construction of the enclosing purlin is completed; c. a construction stage, namely constructing a first concrete on one side, close to the enclosure structure, below the enclosure purlin, cutting off the tripod, and paving a second waterproof coiled material below the enclosure purlin, namely, clinging to the side part of the first concrete; d. a first lining wall structure is constructed under the enclosing purlin in a manner of being clung to a second waterproof coiled material, and a second plain concrete is constructed at a position above the enclosing purlin corresponding to the first plain concrete; e. paving a third waterproof coiled material on the side part of the Fang Jintie second plain concrete on the enclosing purlin, and constructing a second lining wall structure at a position above the enclosing purlin corresponding to the first lining wall; in the step a, vertical longitudinal steel bars are arranged in the enclosure structure, a tripod is welded and fixed with the longitudinal steel bars, the tripod is used for jacking the enclosure purlin, the tripod is made of a steel structure and comprises an isosceles right triangle frame body and a group of parallel connecting rods arranged on the frame body, the hypotenuse of the triangle frame body extends upwards and forms a point extension section capable of being cut off at the bottom of the enclosure purlin, one side right angle side of the triangle frame body is fixedly connected with the longitudinal steel bars, one end of the connecting rod is fixedly connected with the hypotenuse of the frame body, and the other end of the connecting rod is fixedly connected with the right angle side of the triangle frame body or the bottom of the enclosure purlin.
2. The waterproof construction method for the open cut semi-reverse construction method tunnel surrounding purlin node according to claim 1, wherein the method comprises the following steps: the upper part of the enclosing purlin hanging bar is welded with the longitudinal steel bars of the enclosing structure, and the lower part of the hanging bar is not welded with the longitudinal steel bars of the enclosing structure.
3. The waterproof construction method for the open cut semi-reverse construction method tunnel surrounding purlin node according to claim 1, wherein the method comprises the following steps: the top surface and the bottom surface of the enclosing purlin are respectively protruded towards the first lining wall and the second lining wall and extend for 200-300 mm, and a steel plate water stop belt is arranged between the top surface and the bottom surface of the enclosing purlin and the first lining wall and the second lining wall.
4. The waterproof construction method for the open cut semi-reverse construction method tunnel surrounding purlin node according to claim 1, wherein the method comprises the following steps: the first concrete is arranged between the first lining wall and the enclosure structure, the second concrete is arranged between the second lining wall and the enclosure structure, and the first concrete and the second concrete are self-waterproof concrete structures.
5. A waterproof construction method for an open cut semi-reverse construction tunnel purlin node according to claim 3, characterized in that: the first waterproof coiled material is arranged close to the side edge of the enclosure structure along the enclosure purlin, and the two ends of the first waterproof coiled material are terminated at the protruding parts of the top surface and the bottom surface of the enclosure purlin.
6. A waterproof construction method for an open cut semi-reverse construction tunnel purlin node according to claim 3, characterized in that: the second waterproof coiled material and the third waterproof coiled material are lapped with the first waterproof coiled material at the raised positions of the top surface and the bottom surface of the enclosing purlin, and the lapping width is more than or equal to 100mm.
7. The waterproof construction method for the open cut semi-reverse construction method tunnel surrounding purlin node according to claim 1, wherein the method comprises the following steps: and c, pouring the first plain concrete and the tripod, wherein the cut tripod is arranged outside the first plain concrete.
8. The waterproof construction method for the open cut semi-reverse construction method tunnel surrounding purlin node according to claim 1, wherein the method comprises the following steps: and c, before the second waterproof coiled material is paved, the cut tripod is trowelled by cement mortar, so that the tripod is prevented from damaging the waterproof coiled material.
9. The waterproof construction method for the open cut semi-reverse construction method tunnel surrounding purlin node according to claim 1, wherein the method comprises the following steps: and e, cutting the hanging rib between the enclosing purlin and the enclosing structure before paving the third waterproof coiled material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911421535.5A CN111139863B (en) | 2019-12-31 | 2019-12-31 | Waterproof construction method for open cut half reverse construction method tunnel surrounding purlin node |
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| CN201911421535.5A CN111139863B (en) | 2019-12-31 | 2019-12-31 | Waterproof construction method for open cut half reverse construction method tunnel surrounding purlin node |
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| CN111139863B true CN111139863B (en) | 2023-05-30 |
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| CN112281860B (en) * | 2020-10-10 | 2022-10-11 | 中国建筑第八工程局有限公司 | Inner lining wall structure and construction method thereof |
| CN113482021A (en) * | 2021-08-19 | 2021-10-08 | 中铁第六勘察设计院集团有限公司 | Half-pile supporting structure for excavating shallow foundation pit above underground structure floor and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003129585A (en) * | 2001-10-24 | 2003-05-08 | Takanori Miura | Heat insulating method for building |
| CN205935184U (en) * | 2016-08-08 | 2017-02-08 | 南京金宸建筑设计有限公司 | Take single -side supporting formwork basement outer wall of flexible waterproof layer external mold |
| CN107574826A (en) * | 2017-08-16 | 2018-01-12 | 中铁第四勘察设计院集团有限公司 | A kind of concrete purlin and the general attachment structure and connection construction method gone along with sb. to guard him |
| CN208039267U (en) * | 2018-04-02 | 2018-11-02 | 中国兵器工业北方勘察设计研究院有限公司 | A kind of support connection structure of subway foundation pit steel purlin |
| CN109083199B (en) * | 2018-09-30 | 2023-10-27 | 广西壮族自治区城乡规划设计院 | Utility tunnel and box waterproof construction thereof |
| CN110306591A (en) * | 2019-06-27 | 2019-10-08 | 中铁第四勘察设计院集团有限公司 | A kind of base pit engineering exempts to set the construction method of the underground structure of temporary support |
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