CN104060997A - Method for conducting construction by enabling shield tunneling machine to penetrate through inspection well - Google Patents
Method for conducting construction by enabling shield tunneling machine to penetrate through inspection well Download PDFInfo
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- CN104060997A CN104060997A CN201410329413.4A CN201410329413A CN104060997A CN 104060997 A CN104060997 A CN 104060997A CN 201410329413 A CN201410329413 A CN 201410329413A CN 104060997 A CN104060997 A CN 104060997A
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- manhole
- shield structure
- glass fiber
- inspection well
- stirrup
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Abstract
A method for conducting construction by enabling a shield tunneling machine to penetrate through an inspection well includes the following steps of firstly, excavating the inspection well in a manual mode; secondly, binding reinforcing steel bars and conducting pouring to form a concrete protection wall; thirdly, binding glass fiber ribs and conducting pouring to form a concrete protection wall; fourthly, arranging a glass fiber rib stirrup reinforcing area with the range from the portion 500 mm away from the junction, serving as the center, of the inspection well and a shielding outer shell to the portion 500 mm away from the junction, serving as the center, of the inspection well and the shielding outer shell; fifthly, controlling the shield tunneling machine to penetrate through the inspection well through appropriate shielding parameters. The method has the advantages that the safety stock is provided for excavation, achieved through the shield tunneling machine, of the inspection well by locally increasing the stirrup ratio of the glass fiber rib stirrups, the shear capacity of a glass fiber rib grating in the contact area of the inspection well and the shielding outer shell is enhanced, overall shearing resistance damage is prevented, and the safety is greatly improved when the shield tunneling machine penetrates through the inspection well. The appropriate shielding parameters such as the total thrust, the excavation speed, the torque and the cutter head rotating speed are selected, and it is ensured that the shield tunneling machine can safely penetrate through the inspection well due to the appropriate shielding parameters.
Description
Technical field
The present invention relates to the method in shield machine driving tunnel, specifically shield structure passes through a construction method for manhole, comprises the construction method (the local Structural Tectonics of strengthening in manhole and shield structure housing contacts region) of manhole and the parameter setting that shield structure passes through manhole.
Background technology
Shield tunnel is domestic and international application the most a kind of tunnel piercing method at present, and shield construction is generally divided into three phases, i.e. shield launching, normal driving, reception.
Due to the complexity of hydrogeological conditions and construction environment, in shield machine tunneling process, unavoidably there will be various mechanical breakdowns and cutterhead wearing and tearing, especially under the complex geological conditions such as sand-pebble layer, cutterhead wearing and tearing are very serious, to directly affect programming, even in tunneling process, pause, completely lose tunneling function.For meeting the needs of shield machine maintenance, along a series of shield structure manholes of constructing in shield driving direction, emphasis checks shield cutter abrasion condition and changes cutterhead.Within the scope of shield driving, the manhole borehole wall adopts the method for glass fiber reinforced concrete to carry out supporting, can avoid manually abolishing the security risk that steel concrete armlet brings, realize the direct slow cutting manhole of cutter head of shield machine glass fiber reinforced concrete armlet and base plate.Glass fiber muscle (Glass Fiber Reinforced Polymer Rebar), is called for short GFRP, is a kind of glass fibre reinforced composion, is merged and forms through heat by glass fiber and resin, can be processed into the form the same with reinforcing bar and size.Compared with reinforcing bar, GFRP muscle has that tensile strength is high, lightweight, can cutting good, corrosion resistance is good, heat conduction and the advantage such as electrical conduction ability is low, can be used for replacing under many circumstances plain bars.
Manhole armlet adopts after glass fiber muscle Part Substitution plain bars, and shield structure passes through manhole and has some problems.Because glass fiber muscle has lower shear strength, the front of shield driving is manhole simultaneously, is to face dummy status, and under shield structure thrust, general shear failure easily occurs for manhole and shield structure housing contacts region glass fiber muscle grid.
Summary of the invention
The object of the invention is: provide a kind of shield structure to pass through the construction method of manhole, set rational shield structure and pass through the local Structural Tectonics of strengthening of manhole parameter and manhole and shield structure housing contacts region.The local Structural Tectonics of strengthening of shield structure hole glass fiber muscle fender post, passes through manhole because of manhole and the not enough problem that easily causes engineering accident of shield structure housing contacts region glass fiber muscle grid shear-carrying capacity to solve the shield structure that prior art exists.
Technical scheme of the present invention is: a kind of shield structure passes through the construction method of manhole, it is characterized in that, mainly comprises the following steps:
(1) hand excavation's manhole: manhole is from ground to the vertical shaft of shield structure channel middle;
(2) assembling reinforcement concreting armlet: the inwall assembling reinforcement of the part in manhole more than shield structure passage;
(3) colligation glass fiber muscle concreting armlet: replacing reinforcing bar apart from 500mm place, shield structure passage upper end to shaft bottom with glass fiber muscle, between the two, mutually overlap, and with being no less than two U-shaped buckle mechanical connections of steel;
(4) centered by manhole and shield structure shell intersection, be provided with glass fiber muscle stirrup reinforcement district up and down within the scope of the each 500mm in both sides, the stirrup spacing in this glass fiber muscle stirrup reinforcement district is less than the stirrup spacing of the glass fiber muscle in other regions;
(5) pass through manhole with suitable shield structure parameter control shield machine.
Described reinforcing bar and glass fiber muscle are made up of many axial ribs and the stirrup that is centered around axial ribs, and the stirrup spacing of described reinforcing bar and glass fiber muscle is 200mm, and the stirrup spacing that described glass fiber muscle stirrup is strengthened district is 100mm.
Lap length between described reinforcing bar and glass fiber muscle is 40 times of axial ribs diameter.
The diameter that described shield structure passes through manhole is 2m ~ 3m, and the degree of depth is calculated by following formula:
L=H+（1/2~2/3）D
In formula: L is the manhole degree of depth; H is shield structure thickness of earth covering; D is shield structure diameter.
When passing through manhole, shield structure tunnels according to following shield structure parameter control: (1) shield structure gross thrust: 800t ~ 1000t; (2) fltting speed: 5mm/min; (3) cutterhead rotating speed: 0.5rad/min ~ 1.5rad/min; (4) cutterhead moment of torsion: 3600kNm ~ 4000kNm.
Beneficial effect of the present invention is: the stirrup ratio that increases glass fiber muscle stirrup by part, not only for shield structure manhole excavation has improved safety stock, and strengthen the shear-carrying capacity of manhole and shield structure housing contacts region glass fiber muscle grid, prevent integral anti-shearing and destroy, greatly improved the safety that shield structure passes through manhole.Selecting the major parameter of the shield structures such as suitable gross thrust, driving speed, moment of torsion and cutterhead rotating speed, is also the key factor that ensures that shield structure can pass through safely manhole.
Brief description of the drawings
Fig. 1 is shield structure manhole supporting and protection structure glass fiber muscle of the present invention, reinforcement placement schematic diagram;
Fig. 2 is the enlarged drawing at P place in Fig. 1.
Detailed description of the invention
Referring to Fig. 1 and Fig. 2, the construction method that a kind of shield structure of the present invention passes through manhole, its technological process is: manhole excavation-shield driving is pressed close to manhole one side armlet the inspection of cutting-cutterhead and tool changing-backfill manhole-shield structure cutting opposite side armlet and continued driving.It is characterized in that, mainly comprise the following steps:
(1) hand excavation's manhole 2: manhole 2 is from ground to the vertical shaft at shield tunnel 1 middle part.
(2) reinforcing bar armlet performs: each excavation can not exceed 1m, and assembling reinforcement 3 concreting, until excavation is to 500mm place, shield tunnel top.
(3) glass fiber muscle armlet performs: replace reinforcing bar in 500mm place to shaft bottom above shield tunnel with glass fiber muscle 6, between the two, mutually overlap (overlap 4) with being no less than two U-shaped buckle mechanical connections of steel (for the patented technology of our unit), each excavation can not exceed 1m, and concreting.
Centered by manhole 2 and shield structure shell (outer of shield structure passage 1) intersection, be provided with glass fiber muscle stirrup reinforcement district 5 up and down within the scope of the each 500mm in both sides, the stirrup spacing in this glass fiber muscle stirrup reinforcement district 5 is less than the stirrup spacing of the glass fiber muscle in other regions.
(4) back cover: glass fiber muscle back cover for base plate, and concreting.
(5) shield driving: manhole armlet cutting are pressed close in shield driving, and cutterhead enters manhole, shut down.
(6) check cutterhead: set up step ladder, hand inspection cutterhead also carries out tool changing.
(7) backfill manhole 2: adopt cohesive soil or weak concrete backfill manhole.
(8) shield structure tunnels again: shield structure restarts, and cuts opposite side armlet and tunnel.
Described reinforcing bar 3 and glass fiber muscle 6 form (prior art) by many axial ribs and the stirrup that is centered around axial ribs, and the stirrup spacing of described reinforcing bar and glass fiber muscle is 200mm, and the stirrup spacing that described glass fiber muscle stirrup is strengthened district 5 is 100mm.Lap length between described reinforcing bar 3 and glass fiber muscle 6 is 40 times of axial ribs (main muscle) diameter.
The diameter that described shield structure passes through manhole 2 is 2m ~ 3m, and the degree of depth is calculated by following formula:
L=H+（1/2~2/3）D
In formula: L is the manhole degree of depth; H is shield structure thickness of earth covering; D is shield structure diameter.
When passing through manhole 2, shield structure tunnels according to following shield structure parameter control: (1) shield structure gross thrust: 800t ~ 1000t; (2) fltting speed: 5mm/min; (3) cutterhead rotating speed: 0.5rad/min ~ 1.5rad/min; (4) cutterhead moment of torsion: 3600kNm ~ 4000kNm.
The diameter 2000mm of manhole 2 in figure, shield tunnel 1 diameter 6000mm, is the dimensional errors of prevention shield driving, manhole 1 bottom extends 500mm downwards from shield tunnel 1 center.Manhole supporting and protection structure arrangement of reinforcement is respectively from top to bottom overlap 4, the glass fiber muscle stirrup of reinforcing bar (district) 3, glass fiber muscle and reinforcing bar and strengthens district 5, glass fiber muscle (district) 6.
Claims (5)
1. shield structure passes through a construction method for manhole, it is characterized in that, mainly comprises the following steps:
(1) hand excavation's manhole: manhole is from ground to the vertical shaft of shield structure channel middle;
(2) assembling reinforcement concreting armlet: the inwall assembling reinforcement of the part in manhole more than shield structure passage;
(3) colligation glass fiber muscle concreting armlet: replacing reinforcing bar apart from 500mm place, shield structure passage upper end to shaft bottom with glass fiber muscle, between the two, mutually overlap, and with being no less than two U-shaped buckle mechanical connections of steel;
(4) centered by manhole and shield structure shell intersection, be provided with glass fiber muscle stirrup reinforcement district up and down within the scope of the each 500mm in both sides, the stirrup spacing in this glass fiber muscle stirrup reinforcement district is less than the stirrup spacing of the glass fiber muscle in other regions;
(5) pass through manhole with suitable shield structure parameter control shield machine.
2. the construction method that shield structure according to claim 1 passes through manhole, it is characterized in that, described reinforcing bar and glass fiber muscle are made up of many axial ribs and the stirrup that is centered around axial ribs, the stirrup spacing of described reinforcing bar and glass fiber muscle is 200mm, and the stirrup spacing that described glass fiber muscle stirrup is strengthened district is 100mm.
3. the construction method that shield structure according to claim 2 passes through manhole, is characterized in that, the lap length between described reinforcing bar and glass fiber muscle is 40 times of axial ribs diameter.
4. the construction method that shield structure according to claim 1 passes through manhole, is characterized in that, the diameter that described shield structure passes through manhole is 2m ~ 3m, and the degree of depth is calculated by following formula:
L=H+（1/2~2/3）D
In formula: L is the manhole degree of depth; H is shield structure thickness of earth covering; D is shield structure diameter.
5. the construction method that shield structure according to claim 1 passes through manhole, is characterized in that, tunnels: (1) shield structure gross thrust: 800t ~ 1000t when shield structure passes through manhole according to following shield structure parameter control; (2) fltting speed: 5mm/min; (3) cutterhead rotating speed: 0.5rad/min ~ 1.5rad/min; (4) cutterhead moment of torsion: 3600kNm ~ 4000kNm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329413.4A CN104060997B (en) | 2014-07-11 | 2014-07-11 | The construction method of shield crossing manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329413.4A CN104060997B (en) | 2014-07-11 | 2014-07-11 | The construction method of shield crossing manhole |
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| Publication Number | Publication Date |
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| CN104060997A true CN104060997A (en) | 2014-09-24 |
| CN104060997B CN104060997B (en) | 2016-03-30 |
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| CN201410329413.4A Expired - Fee Related CN104060997B (en) | 2014-07-11 | 2014-07-11 | The construction method of shield crossing manhole |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912561A (en) * | 2015-05-28 | 2015-09-16 | 中建一局集团第五建筑有限公司 | Construction method for continuously passing through vertical shaft by shield under high confined water complex stratum condition |
| CN108590700A (en) * | 2018-02-14 | 2018-09-28 | 北京城建道桥建设集团有限公司 | One kind secretly checking room equipment opening/manhole and its construction method |
| CN109403993A (en) * | 2018-12-04 | 2019-03-01 | 中交隧道工程局有限公司 | A kind of stake of glass fiber-reinforced polymer mesoporous and construction method for the maintenance cleaning of cutter head of shield machine front |
| CN111520162A (en) * | 2020-04-30 | 2020-08-11 | 河北建设勘察研究院有限公司 | Well wall supporting construction method for complex stratum deep-buried small-space operation |
| CN111997632A (en) * | 2020-07-22 | 2020-11-27 | 中铁第四勘察设计院集团有限公司 | Method for shield to pass through vertical shaft |
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| CN203961997U (en) * | 2014-07-11 | 2014-11-26 | 北京建筑大学 | Shield structure hole glass fiber muscle fender post partial reinforced structure |
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2014
- 2014-07-11 CN CN201410329413.4A patent/CN104060997B/en not_active Expired - Fee Related
Patent Citations (7)
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| JPH045397A (en) * | 1990-04-23 | 1992-01-09 | Mitsubishi Heavy Ind Ltd | Obstacle cutting apparatus of sealed excavator |
| CN101614126A (en) * | 2008-06-27 | 2009-12-30 | 深圳市海川实业股份有限公司 | A kind of job practices of directly cutting guard post for tunnel end well by shield machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912561A (en) * | 2015-05-28 | 2015-09-16 | 中建一局集团第五建筑有限公司 | Construction method for continuously passing through vertical shaft by shield under high confined water complex stratum condition |
| CN108590700A (en) * | 2018-02-14 | 2018-09-28 | 北京城建道桥建设集团有限公司 | One kind secretly checking room equipment opening/manhole and its construction method |
| CN109403993A (en) * | 2018-12-04 | 2019-03-01 | 中交隧道工程局有限公司 | A kind of stake of glass fiber-reinforced polymer mesoporous and construction method for the maintenance cleaning of cutter head of shield machine front |
| CN111520162A (en) * | 2020-04-30 | 2020-08-11 | 河北建设勘察研究院有限公司 | Well wall supporting construction method for complex stratum deep-buried small-space operation |
| CN111997632A (en) * | 2020-07-22 | 2020-11-27 | 中铁第四勘察设计院集团有限公司 | Method for shield to pass through vertical shaft |
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| CN104060997B (en) | 2016-03-30 |
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Granted publication date: 20160330 Termination date: 20170711 |