CN111997093A - Short pipe section immersed tunnel construction method - Google Patents
Short pipe section immersed tunnel construction method Download PDFInfo
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- CN111997093A CN111997093A CN202010862441.8A CN202010862441A CN111997093A CN 111997093 A CN111997093 A CN 111997093A CN 202010862441 A CN202010862441 A CN 202010862441A CN 111997093 A CN111997093 A CN 111997093A
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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
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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Abstract
The invention belongs to the technical field of immersed tube engineering, and particularly provides a short pipe section immersed tube tunnel construction method, which comprises the following steps: s10, performing production line type prefabrication production on the immersed tube, wherein the production line type prefabrication production comprises concrete pouring, the concrete pouring is one-step forming, and the length of the formed immersed tube is 20-30 m; s20, transferring the immersed tube to a semi-submersible barge through a plurality of trolleys, wherein the length direction of the immersed tube is the advancing direction of the immersed tube, the length direction of the immersed tube is perpendicular to the advancing direction of the semi-submersible barge, and the draft of the semi-submersible barge is less than or equal to 3 m; and S30, transporting the immersed tube to an immersed tube submerging area through the semi-submerged barge, towing and positioning the immersed tube by adopting an engineering barge, and finishing underwater butt joint between two adjacent immersed tubes by adopting a hydraulic compression joint method. The invention can effectively simplify the barge installation operation of the immersed tube, reduce the construction difficulty and improve the operation efficiency, is convenient for the quality control of the immersed tube and ensures the construction quality of the tunnel.
Description
Technical Field
The invention belongs to the technical field of immersed tube engineering, and particularly relates to a short pipe section immersed tube tunnel construction method.
Background
The section shape and size of the immersed tube in the prior art have corresponding specifications and standards, and the length of the commonly used immersed tube is as long as about 100m, so that the number of tube sections of the used immersed tube can be reduced in the construction process of the immersed tube tunnel due to the large length, thereby effectively reducing the connecting nodes among the immersed tubes and reducing the leakage risk; however, this structure has the following drawbacks:
1. the length of the immersed tube is too large, so that the dead weight of the immersed tube is very large, and the requirements on towing water depth, dry dock site selection and the like are high because floating towing is usually carried out by adopting a dry dock method; if the semi-submersible barge is adopted to transport the immersed tube, the barge difficulty is high, the risk is high, and a special large-scale semi-submersible barge is needed, the requirement on the semi-submersible barge is high, and the transportation in a shallow water area is difficult to realize;
2. because the length of immersed tube self, volume are great, consequently when carrying out the prefabrication or the pouring of immersed tube, need occupy the place great, and it is higher to the continuous supply capacity requirement of concrete, and bulky immersed tube splits easily, leads to operation period tunnel seepage, and the later maintenance is very troublesome.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a short pipe section immersed tube tunnel construction method, which can effectively simplify the barge installation operation of immersed tubes, reduce the construction difficulty, improve the operation efficiency, facilitate the quality control of the immersed tubes and ensure the tunnel construction quality.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a short pipe section immersed tunnel construction method comprises the following steps:
s10, performing production line type prefabrication production on the immersed tube, wherein the production line type prefabrication production comprises steel bar binding, template installation, concrete pouring and outfitting, the concrete pouring is one-step forming, and the length of the formed immersed tube is 20-30 m;
s20, arranging a plurality of trolleys at the bottoms of the formed immersed tubes, and transferring the immersed tubes to a semi-submersible barge through the trolleys, wherein in the transferring process, the length direction of the immersed tubes is the advancing direction of the immersed tubes, the length direction of the immersed tubes is perpendicular to the advancing direction of the semi-submersible barge, and the draft of the semi-submersible barge is less than or equal to 3 m;
s30, transporting the immersed tube to an immersed tube submerging area through the semi-submerged barge, towing and positioning the immersed tube by adopting an engineering barge, and finishing underwater butt joint between two adjacent immersed tubes by controlling a ballast water system and adopting a hydraulic compression joint method.
Further, in step S10, a plurality of pipelines are provided, and the pipelines are arranged side by side or independently;
each the assembly line is provided with five at least pedestals, including bottom plate reinforcement pedestal, wall body reinforcement pedestal, roof reinforcement pedestal, concrete placement pedestal and the outfitting pedestal that sets up in order.
Further, the assembly line is provided with 4-8 pieces of fittings side by side, and 2-4 fitting-out pedestals are arranged on the same assembly line.
Further, in step S20, the trolley is provided with at least three rows, including a first row disposed at one end of the immersed tube, a second row disposed corresponding to the middle upright of the immersed tube, and a third row disposed at the other end of the immersed tube in sequence along the width direction of the immersed tube;
and each trolley is provided with a jack.
Furthermore, the trolley is provided with four rows, wherein the two rows are arranged corresponding to the middle upright post of the immersed tube;
the trolleys are arranged at intervals along the length direction of the immersed tube, and the distance between every two adjacent trolleys is 1.5-1.8 m.
Further, in step S30, after the semi-submersible barge transports the immersed tube to the immersed tube submerging area, the method further includes the following steps:
and S31, after the semi-submersible barge submerges in the special submerging pit, winching the immersed tube out of the semi-submersible barge through an engineering barge, and winching the immersed tube to an installation area.
Further, the method also comprises the following steps:
s32, arranging an installation barge for installing the immersed tube and a crane ship for installing and detaching a secondary outfitting piece of the immersed tube in the installation area of the immersed tube; the sinking installation of the immersed tube is performed by the installation barge.
Further, a cable adjusting system for adjusting the inclination state of the immersed tube during installation is arranged on the installation barge.
Further, the method also comprises the following steps:
and S33, arranging engineering barges on two sides of the installation area of the immersed tube, and adjusting the transverse alignment of the immersed tube by the engineering barges arranged on the two sides of the installation area.
Further, the method also comprises the following steps:
s40, arranging a water stop structure at the connecting end of two adjacent immersed tubes, reserving a boss structure at the connecting end of the immersed tubes, and arranging metal plates on the side surfaces of the boss structure;
a first water stop belt is arranged between the two oppositely arranged boss structures;
and a second water stop is arranged between the inner side surfaces of the two oppositely arranged boss structures.
Compared with the prior art, the invention has the beneficial effects that:
1. the length of the pipe joint of the immersed pipe is optimized in the scheme, so that the immersed pipe can be formed at one time in the production process, the condition of layering and segmentation is avoided, and construction joints are avoided; the requirement of a construction site on the continuous concrete supply capacity is reduced, the popularization and the application are convenient, the crack control risk in the processes of immersed tube prefabrication, transportation and installation is substantially reduced, and the water seepage probability of an immersed tube tunnel is reduced.
2. The immersed tube provided by the scheme has the advantages of short length and light weight, a large-scale construction ship does not need to be configured for transportation, the construction requirement of the immersed tube can be met by adopting a conventional semi-submersible barge, and the configuration requirement and the application environment requirement of the ship are greatly reduced, so that the construction cost is effectively reduced, and the available resources are wider. Meanwhile, the immersed tube in the scheme can be installed by adopting a conventional ship, the requirement on the water depth of a barge is lowered, the immersed tube can be applied to a shallow water area, and the current situation that the tunnel construction cannot be carried out in the shallow water area by adopting an immersed tube method in the prior art is solved.
3. In this scheme, effectively reduced immersed tube prefabrication production line's plane size requirement, can fully improve prefabricated efficiency, simultaneously, the length design of the immersed tube in this scheme satisfies from the superficial requirement for self buoyancy at the in-process of installation make full use of immersed tube installs, has reduced the degree of difficulty of immersed tube installation and is favorable to simplifying ballast water system, and conveying efficiency and installation effectiveness can all be increased substantially.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the production line of the present invention.
Fig. 2 is a schematic layout of the trolley of the present invention.
Fig. 3 is a schematic view of the construction operation of the present invention in floating of the immersed tube.
Fig. 4 is a schematic view of the construction operation of the present invention when the immersed tube is installed.
Fig. 5 is a schematic structural diagram of the water stopping structure of the present invention.
Wherein:
1-immersed tube, 2-assembly line, 21-bottom plate steel bar binding pedestal, 22-wall body steel bar binding pedestal, 23-top plate steel bar binding pedestal, 24-concrete pouring pedestal, 25-outfitting pedestal, 3-trolley, 4-semi-submerged barge, 5-engineering barge, 6-crane ship, 7-water stop structure, 71-boss structure, 72-metal plate, 73-first water stop, 74-second water stop and 75-butt strap.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
As shown in fig. 1 to 5, the present embodiment provides a method for constructing a short pipe segment immersed tunnel, which mainly includes the following steps:
s10, prefabricating a sinking pipe:
carrying out assembly line 2 type prefabrication production on the immersed tube 1, wherein the assembly line 2 type prefabrication production comprises four parts of steel bar binding, template installation, concrete pouring and outfitting; the concrete pouring is one-step forming so as to realize layering-free, segmentation-free and construction joint-free pouring of the immersed tube 1 and reduce the cracking risk of the immersed tube 1, the length of the immersed tube 1 after forming is 20-30m, and in the embodiment, the length of the immersed tube 1 is 22m so as to facilitate size regulation and control of the immersed tube tunnel tube section, meet the self-floating requirement of the single-section immersed tube 1 and reduce the installation and construction difficulty.
Furthermore, the assembly line 2 is provided with a plurality of assembly lines, in practical application, the assembly lines 2 can be arranged side by side in the same area, and the assembly lines 2 can be arranged independently according to different output areas of a field; further, each of the flow lines 2 is provided with at least five pedestals including a bottom plate reinforcement pedestal 21, a wall body reinforcement pedestal 22, a top plate reinforcement pedestal 23, a concrete pouring pedestal 24, and an outfitting pedestal 25, which are arranged in this order.
As a preferable scheme, in this embodiment, the plurality of flow lines 2 are arranged side by side, 4 to 8 flow lines can be arranged according to actual production requirements, and 2 to 4 outfitting pedestals 25 are sequentially arranged on the same flow line 2, so as to meet supply requirements for installing the immersed tube 1 and improve the management and control capability on the construction period.
S20, immersed tube transportation:
the method comprises the following steps that a plurality of trolleys 3 are arranged at the bottoms of the formed immersed tubes 1, and the immersed tubes 1 are transferred to a semi-submersible barge 4 through the trolleys 3, wherein in the transfer process, the length direction of the immersed tubes 1 is the advancing direction of the immersed tubes and is conveyed to a wharf, and the length direction of the immersed tubes 1 is perpendicular to the advancing direction of the semi-submersible barge 4, so that the transverse barge operation from the wharf to the barge can be realized in the transfer of the immersed tubes 1, the operation is simpler and more convenient, the requirement on the barge when a pipeline joint needs to be vertically barge in the prior art is effectively avoided, and the operational difficulty of the barge on the immersed tubes 1 is greatly reduced; in addition, the immersed tube 1 in the embodiment can allow the draft of the semi-submersible barge 4 to be less than or equal to 3m, so that the construction of the immersed tube tunnel in the shallow water area is realized.
Further, the trolley 3 is provided with at least three rows, including a first row which is sequentially arranged at one end of the immersed tube 1 along the width direction of the immersed tube, a second row which is arranged corresponding to the middle upright post of the immersed tube 1, and a third row which is arranged at the other end of the immersed tube 1; each trolley 3 is provided with a jack.
As a preferable scheme, in this embodiment, the trolley 3 is provided with four rows, two rows of the middle upright columns corresponding to the immersed tube 1 are arranged at the bottom of the immersed tube 1, and the other two rows of the middle upright columns are respectively arranged at two ends of the bottom of the immersed tube 1; and along the length direction of the immersed tube 1, a plurality of trolleys 3 are arranged at intervals, and the distance between every two adjacent trolleys 3 is 1.5-1.8 m.
S30, mounting the immersed tube:
and (2) transporting the immersed tube 1 to an immersed tube submergence area through the semi-submerged barge 4, towing and positioning the immersed tube 1 by adopting an engineering barge 5, and finishing underwater butt joint between two adjacent immersed tubes 1 by controlling a ballast water system and adopting a hydraulic compression joint method.
Further, after the semi-submersible barge 4 transports the immersed tube 1 to an immersed tube submerging area, the method further comprises the following steps:
s31, carrying out submergence operation of the semi-submerged barge 4 in a special submergence pit, after submerging the semi-submerged barge 4, winching the immersed tube 1 out of the semi-submerged barge 4 through an engineering barge 5, and winching the immersed tube 1 to an installation area.
S32, arranging a barge (not shown) for installing the immersed tube 1 and a crane ship 6 for installing and removing fittings in the installation area of the immersed tube 1, wherein the crane ship 6 is a 200t crane ship, and sinking and installing the immersed tube 1 through the installation barge.
Furthermore, in this embodiment, a cable adjusting system for adjusting the inclination of the immersed tube 1 during installation is further provided on the installation barge, so as to adjust the angle of the immersed tube 1.
S33, arranging engineering barges 5 at two sides of the installation area of the immersed tube 1, and adjusting the transverse line shape of the immersed tube 1 through the engineering barges 5 arranged at two sides of the installation area; the engineering barge 5 can adopt a flat barge, and the transverse linear adjustment of the immersed tube 1 is realized through the arrangement of the flat barge, so that the structure of the crane ship is further simplified, and the installation efficiency and the installation accuracy of the immersed tube 1 are effectively improved.
S40, connecting the immersed tubes:
a water stopping structure 7 is arranged at the connecting end of two adjacent immersed tubes 1, a boss structure 71 is reserved at the connecting end of each immersed tube 1, and metal plates 72 are arranged on the side surfaces of the boss structures 71; a first water stop belt 73 is arranged between the two oppositely arranged boss structures 71, and the first water stop belt 73 adopts a GINA water stop belt; a second water stop belt 74 is arranged between the inner side surfaces of the two opposite boss structures 71, and the second water stop belt 74 is an OMEGA water stop belt; in addition, a butt strap 75 is further disposed between the inner side surfaces of the connecting ends of the two immersed tubes 1, and the first water stop 73, the second water stop 74 and the butt strap 75 are sequentially disposed from the outside to the inside at the connecting ends of the two immersed tubes 1.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A short pipe section immersed tunnel construction method is characterized by comprising the following steps:
s10, performing production line type prefabrication production on the immersed tube, wherein the production line type prefabrication production comprises steel bar binding, template installation, concrete pouring and outfitting, the concrete pouring is one-step forming, and the length of the formed immersed tube is 20-30 m;
s20, arranging a plurality of trolleys at the bottoms of the formed immersed tubes, and transferring the immersed tubes to a semi-submersible barge through the trolleys, wherein in the transferring process, the length direction of the immersed tubes is the advancing direction of the immersed tubes, the length direction of the immersed tubes is perpendicular to the advancing direction of the semi-submersible barge, and the draft of the semi-submersible barge is less than or equal to 3 m;
s30, transporting the immersed tube to an immersed tube submerging area through the semi-submerged barge, towing and positioning the immersed tube by adopting an engineering barge, and finishing underwater butt joint between two adjacent immersed tubes by controlling a ballast water system and adopting a hydraulic compression joint method.
2. The method for constructing a short pipe section immersed tunnel according to claim 1, wherein in step S10, a plurality of said flow lines are provided, said flow lines being disposed side by side or independently from each other;
each the assembly line is provided with five at least pedestals, including bottom plate reinforcement pedestal, wall body reinforcement pedestal, roof reinforcement pedestal, concrete placement pedestal and the outfitting pedestal that sets up in order.
3. The construction method of the short pipe section immersed tunnel according to claim 2, wherein 4-8 flow lines are arranged side by side, and 2-4 outfitting pedestals are arranged on the same flow line.
4. The method for constructing a short pipe section immersed tunnel according to claim 1, wherein in step S20, the trolley is provided with at least three rows, including a first row arranged at one end of the immersed tube, a second row arranged corresponding to the middle upright post of the immersed tube and a third row arranged at the other end of the immersed tube in sequence along the width direction of the immersed tube;
and each trolley is provided with a jack.
5. The construction method of the short pipe section immersed tunnel according to claim 4, wherein the trolley is provided with four rows, wherein two rows are arranged corresponding to the middle upright post of the immersed pipe;
the trolleys are arranged at intervals along the length direction of the immersed tube, and the distance between every two adjacent trolleys is 1.5-1.8 m.
6. The method for constructing a short pipe section immersed tunnel according to claim 1, wherein in step S30, after the semi-submersible barge transports the immersed pipe to an immersed zone, the method further comprises the following steps:
and S31, after the semi-submersible barge submerges in the special submerging pit, winching the immersed tube out of the semi-submersible barge through an engineering barge, and winching the immersed tube to an installation area.
7. The construction method of the short pipe section immersed tunnel according to claim 6, further comprising the steps of:
s32, arranging an installation barge for installing the immersed tube and a crane ship for installing and detaching a secondary outfitting piece of the immersed tube in the installation area of the immersed tube; the sinking installation of the immersed tube is performed by the installation barge.
8. The method of claim 7, wherein the installation barge is provided with a cable adjusting system for adjusting the inclination of the immersed tube during installation.
9. The construction method of the short pipe section immersed tunnel according to claim 7 or 8, further comprising the steps of:
and S33, arranging engineering barges on two sides of the installation area of the immersed tube, and adjusting the transverse alignment of the immersed tube by the engineering barges arranged on the two sides of the installation area.
10. The construction method of the short pipe section immersed tunnel according to claim 1, further comprising the steps of:
s40, arranging a water stop structure at the connecting end of two adjacent immersed tubes, reserving a boss structure at the connecting end of the immersed tubes, and arranging metal plates on the side surfaces of the boss structure;
a first water stop belt is arranged between the two oppositely arranged boss structures;
and a second water stop is arranged between the inner side surfaces of the two oppositely arranged boss structures.
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| CN202010862441.8A CN111997093A (en) | 2020-08-25 | 2020-08-25 | Short pipe section immersed tunnel construction method |
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| CN202010862441.8A CN111997093A (en) | 2020-08-25 | 2020-08-25 | Short pipe section immersed tunnel construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113878704A (en) * | 2021-10-12 | 2022-01-04 | 中交第四航务工程局有限公司 | Immersed tube assembly line prefabricating system and method |
| CN113879487A (en) * | 2021-10-12 | 2022-01-04 | 中交第四航务工程局有限公司 | Non-self-floating immersed tube discharging method |
| CN113911271A (en) * | 2021-10-12 | 2022-01-11 | 中交第四航务工程局有限公司 | Immersed tube floating state refuting method |
| CN114215109A (en) * | 2021-11-29 | 2022-03-22 | 中交第四航务工程局有限公司 | Discharging and refuting system and discharging and refuting method for negative buoyancy immersed tube |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878704A (en) * | 2021-10-12 | 2022-01-04 | 中交第四航务工程局有限公司 | Immersed tube assembly line prefabricating system and method |
| CN113879487A (en) * | 2021-10-12 | 2022-01-04 | 中交第四航务工程局有限公司 | Non-self-floating immersed tube discharging method |
| CN113911271A (en) * | 2021-10-12 | 2022-01-11 | 中交第四航务工程局有限公司 | Immersed tube floating state refuting method |
| CN113911271B (en) * | 2021-10-12 | 2022-09-16 | 中交第四航务工程局有限公司 | Immersed tube floating state refuting method |
| CN113879487B (en) * | 2021-10-12 | 2023-02-24 | 中交第四航务工程局有限公司 | Non-self-floating immersed tube discharging method |
| CN114215109A (en) * | 2021-11-29 | 2022-03-22 | 中交第四航务工程局有限公司 | Discharging and refuting system and discharging and refuting method for negative buoyancy immersed tube |
| CN114215109B (en) * | 2021-11-29 | 2023-02-21 | 中交第四航务工程局有限公司 | Discharge and barge system and discharge and barge method of negative buoyancy immersed tube |
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Application publication date: 20201127 |