CN101929338B - Hydraulic fan-shaped support system for controlling steel frame deformation in tunnel construction - Google Patents
Hydraulic fan-shaped support system for controlling steel frame deformation in tunnel construction Download PDFInfo
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- CN101929338B CN101929338B CN 200910062751 CN200910062751A CN101929338B CN 101929338 B CN101929338 B CN 101929338B CN 200910062751 CN200910062751 CN 200910062751 CN 200910062751 A CN200910062751 A CN 200910062751A CN 101929338 B CN101929338 B CN 101929338B
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Abstract
The invention discloses a hydraulic fan-shaped support system for controlling steel frame deformation in tunnel construction. The support system is characterized in that: a steel box pedestal (1) is placed on the middle part of a tunnel step, a plurality of telescopic hydraulic cylinders (6) with steel sleeves (5) are fixed at the top of the steel box pedestal (1) in a fan-shaped mode, the steel sleeves (5) are sleeved into support steel pipes, and the hydraulic cylinders (6) are connected with a hydraulic system. When great deformation happens under the pressure action of a tunnel surrounding rock at initial support of the tunnel, the support system can be quickly arranged to quickly and effectively provide a stable system supporting force and prevent collapse and support deformation from intruding into the tunnel limit to cause rework; and when the tunnel is normally tunneled and dug below the step, the system is arranged to prevent overlarge deformation, ensure the safety of tunnelconstruction and save the engineering cost.
Description
Technical field
The present invention relates to tunnel construction equipment, is a kind of in order to control the hydraulic fan-shaped support system with box-shaped base steel seat of Tunnel steel frame deformation specifically.
Background technology
In construction of tunnel, the weak surrounding rock large cross-section tunnel excavation methods (such as benching tunnelling method, CD method, CRD method etc.) that adopt partial excavation more, wherein benching tunnelling method is used more because quick construction is convenient.The main order of its construction is: excavation is topped bar, and supporting steelframe (being generally profile steel frame or grid steel frame) is installed, and sprayed mortar.Then excavation is got out of a predicament or an embarrassing situation and inverted arch, and the supporting steelframe of getting out of a predicament or an embarrassing situation with inverted arch is installed.When excavation is got out of a predicament or an embarrassing situation with inverted arch, when being supporting steel frame deformation maximum.When the geology condition is bad, often cause the large deformation of steelframe, if this distortion can not get controlling timely, can cause Tunnel Landslide; Perhaps the steelframe of distortion is invaded tunnel space, just the steelframe of distortion need to be removed and change, and in changeing the steelframe process, also usually brings out landslide.No matter be landslide or change steelframe, the engineering cost of generation is all larger, is will fight off its generation in the constructing tunnel.In order to control the large deformation of already installed steelframe under the pressure from surrounding rock effect, mainly contain following two kinds of methods:
1. increase the thickness of sprayed mortar, at the layer concrete that fills spray, increase the thickness of structure on the surface of original sprayed mortar, control distortion.
2. increase temporary supporting at steelframe.Temporary supporting adopts the supporting rod of on-the-spot interim processing more, and the section form of rod member has i iron, round steel pipe etc.Braced structures adopts truss-like or single-point support more
Adopt the method for thickening sprayed mortar, effect is slower, and the engineering time is longer, often can not in time control country rock and steel frame deformation; Employing increases the method for temporary supporting at steelframe, have an engineering time short, and force-mechanism is clear and definite clear, successful, and braced structures can be reused, the advantages such as good economy performance.But these temporary supportings mostly are and adopt the interim processing of on-the-spot existing material (steel pipe, i iron etc.) at present, have following problem:
1. that supports is placed directly on the original ground, and enough support forces can not be provided.Process if carry out ground at original ground, waste time and energy, take the valuable time.
2. support is bad with contacting of steelframe, adopts timber wedge etc. more, can not guarantee uniform stressed
3. can not provide prestressing force
4. single-point support can not form stable support system
5. processing, installation inconvenience
Summary of the invention
Purpose of the present invention provides a kind of fan-shaped support system that acts on the tunnel steelframe that can Fast Installation addressing the above problem, and is the constructing tunnel efficiently temporary supporting system of providing convenience.
The agent structure that is used for the hydraulic fan-shaped support system of control steelframe large deformation in the described constructing tunnel is comprised of support unit and box-shaped pedestal, support unit is comprised of hydraulic jack and steel pipe, it is characterized in that: lay steel case pedestal at tunnel step middle part, be fan-shaped a plurality of telescoping hydraulic cylinders with steel bushing that are fixed with at steel case pedestal top, steel bushing is inserted in as being nested hydraulic cylinder connecting fluid pressing system in the steel pipe of support bar or with support bar.
As the embodiment of native system, have following prioritization scheme to improve this support system: described steel case pedestal is fixed by the steel pipe anchoring pile of being driven underground.
Each telescoping hydraulic cylinder on the described steel case pedestal adopts independently hydraulically extensible control.Be that each telescoping hydraulic cylinder has independently extension and contraction control switch, perhaps connect one by one the hydraulic jack control action.
Is furnished with respectively pressure instrumentation on each telescoping hydraulic cylinder, with the suffered pressure of each support bar direction of real-time detection.
There is oblique connecting rod mutually to support between the support system of many Pin that steel case pedestal and support bar consist of.One Pin support system is by a steel case pedestal and entrained a plurality of hydraulic cylinders thereof, withstand on the semicircular supporting steelframe with the support bar of respective numbers, form the fan-shaped support system of a Pin, in a tunnel, support mutually by connecting rod between many Pin support system, to strengthen the stability of support system.
Hydraulic cylinder and a support bar with steel bushing consists of a support unit, and the support unit steel pipe is connected sleeve to connect with hydraulic cylinder, and attached connecting rod adopts pin to connect, and hydraulic cylinder is connected with flange bolt with steel case pedestal, conveniently to install.
When the tunnel benching tunnelling method is constructed, before excavation is got out of a predicament or an embarrassing situation, native system is installed, can prevent the distortion of preliminary bracing steelframe in the digging process.And after the tunnel steel frame deformation transfinites, native system is installed, can promptly provide supporting to reinforce.And can apply certain prestressing force to steelframe, effectively controlled the Tunnel steel frame deformation, prevent because the Tunnel Landslide that the supporting Lack of support causes, prevent that simultaneously the dismounting that the excessive intrusion tunnel clearance of steel frame deformation causes from doing over again, eliminate construction safety hidden danger, guarantee safety for tunnel engineering, save engineering cost.
The present invention has shortened the set-up time of installation temporary supporting in the constructing tunnel greatly, and can increase substantially quality and the stability of temporary supporting.By regulating the length of support bar, can adapt to various tunnel cross-sections, and can two Pin or many Pin link to each other, form whole stressed structure, greatly increased the reliability that supports.Simultaneously, by hydraulic jack, can regulate the support force of each point, and can apply prestressing force to the tunnel steelframe.Both having can be used for the tunnel, normally to tunnel prevention initial stage steel frame deformation excessive, can be used as again the emergency set that guarantees the tunnel safety construction, significantly reduced the cost of protection system simultaneously.For guaranteeing safety for tunnel engineering, prevent that the Tunnel Landslide that the Tunnel distortion brings is significant.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention,
Fig. 2 box-shaped pedestal schematic diagram,
Many Pin of Fig. 3 connection diagram
Among the figure: 1-steel case pedestal, 2-support bar, 3-supporting steelframe, 4-anchoring pile, 5-steel bushing, 6-hydraulic cylinder, 7-connecting rod.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples: the present invention is applicable to surpass expection when the deflection of constructing tunnel steelframe, i.e. sedimentation surpasses anticipated settlement; The convergent deformation fouling of clearance gauge of periphery abutment wall; Perhaps find that by the monitoring measurement in tunnel distortion does not restrain; Or deflection supports interim reinforcing to tunnel steel steel arch frame when sharply changing.
The hydraulic fan-shaped support system that is used for the large deformation of control steelframe in the described constructing tunnel, in these cases, the fixing steel case pedestal 1 in ground middle part in the tunnel, be connected with the telescoping hydraulic cylinder 6 of a plurality of tops band steel bushing 5 at steel case pedestal 1 usefulness flange and bolt, hydraulic cylinder 6 connecting fluid pressing systems, support bar 2 inserts steel bushing 5 and is supported on the supporting steelframe 3.
Described steel case pedestal 1 can be fixing by the anchoring pile 4 of being driven underground.
Each telescoping hydraulic cylinder 6 on the described steel case pedestal 1 adopts independently hydraulically extensible control.Be that each telescoping hydraulic cylinder 6 has independently extension and contraction control switch, perhaps connect one by one the jack control action, but can share hydraulic motor or jack between these hydraulic cylinders, each hydraulic cylinder has independently passage control.
Is furnished with pressure instrumentation on each telescoping hydraulic cylinder 6.
There is oblique connecting rod 7 mutually to support between the support system of single Pin that steel case pedestal 1 and support bar 2 consist of.Connecting rod adopts pin to connect, conveniently to install.
Erection sequence: steel case pedestal 1 is installed in the steelframe position of at first aliging, then supporting rod is installed, connect hydraulic jack cylinder and hydraulic system, stretch out hydraulic jack for the supporting rod control of installing, apply prestressing force and reach design load, if each support unit uses an independently hydraulic jack operation, then need one by one each support unit operation to be reached prestress value, and notice that bilateral symmetry is afterburning.After the support system of a steel case of installation pedestal 1, the steelframe correspondence position of support need to be installed at the next one another steel case pedestal 1 is installed, until finish whole fan-shaped support system.
When the ground bearing capacity is relatively poor, squeeze into steel pipe anchoring pile 4 with hydraulic vibration driver, steel pipe anchoring pile 4 tops are concordant with ground, can adopt latch to be connected connection with steel case pedestal.
When many groups support system is used simultaneously, adopt connecting rod that pedestal and support bar are linked together, increase globality.
The present invention can also pass through the reading of the oil pressure gauge of hydraulic jack in implementation process, roughly estimate force value and its variation tendency of tunnel surrounding.For the dynamic adjustment of constructing tunnel supporting parameter provides reference.
Claims (4)
1. the hydraulic fan-shaped support system that is used for the large deformation of control steelframe in the constructing tunnel, in order to control the Tunnel steel frame deformation, be the constructing tunnel efficiently temporary supporting system of providing convenience, it is characterized in that: lay steel case pedestal (1) at tunnel step middle part, be the fan-shaped telescoping hydraulic cylinder (6) that is fixed with a plurality of band steel bushings (5) at steel case pedestal (1) top, steel bushing (5) is nested with support bar (2), hydraulic cylinder (6) connecting fluid pressing system; There is oblique connecting rod (7) mutually to support between the support system of many Pin that steel case pedestal (1) and support bar (2) consist of.
2. be used for the hydraulic fan-shaped support system of control steelframe large deformation in the constructing tunnel according to claim 1, it is characterized in that: described steel case pedestal (1) is fixing by the anchoring pile (4) of being driven underground.
3. be used for the hydraulic fan-shaped support system of control steelframe large deformation in the constructing tunnel according to claim 1, it is characterized in that: each telescoping hydraulic cylinder (6) on the described steel case pedestal (1) adopts independently hydraulically extensible control.
4. be used for the hydraulic fan-shaped support system of control steelframe large deformation according to claim 1 or in the 3 described constructing tunnels, it is characterized in that: each telescoping hydraulic cylinder is furnished with pressure instrumentation on (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910062751 CN101929338B (en) | 2009-06-19 | 2009-06-19 | Hydraulic fan-shaped support system for controlling steel frame deformation in tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910062751 CN101929338B (en) | 2009-06-19 | 2009-06-19 | Hydraulic fan-shaped support system for controlling steel frame deformation in tunnel construction |
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| CN101929338A CN101929338A (en) | 2010-12-29 |
| CN101929338B true CN101929338B (en) | 2013-09-18 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557828B (en) * | 2013-11-12 | 2016-08-17 | 中国建筑第四工程局有限公司 | Tunnel clearance measurement instrument |
| CN103575192B (en) * | 2013-11-25 | 2016-08-17 | 中国建筑第四工程局有限公司 | Tunnel survey instrument |
| CN106869960B (en) * | 2017-03-09 | 2019-06-04 | 洛阳理工学院 | It is a kind of using tunnel initial support invade limit section movement change arch device carry out changing arch method |
| CN107237643B (en) * | 2017-08-14 | 2023-03-21 | 成都理工大学 | Novel hydraulic resistance-increasing type tunnel pressure-yielding device |
| CN108150200A (en) * | 2018-01-18 | 2018-06-12 | 西南石油大学 | A kind of support of tunnel arch and application method |
| CN108386219B (en) * | 2018-04-18 | 2023-08-11 | 招商局重庆交通科研设计院有限公司 | Supporting system of tunnel supporting structure and operation method |
| CN111022091B (en) * | 2019-12-05 | 2021-04-06 | 中铁隧道集团三处有限公司 | Multi-angle supporting rod for tunnel preliminary bracing |
| CN111852070A (en) * | 2020-08-03 | 2020-10-30 | 西安科技大学 | Supporting and reinforcing structure and method for irregular cave top of ancient cave |
| CN114135299B (en) * | 2021-12-06 | 2024-04-26 | 中建三局第一建设工程有限责任公司 | Combined tunnel construction method and supporting structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076159U (en) * | 1990-10-13 | 1991-05-01 | 煤炭科学研究总院太原分院 | Hydraulic support substituting for shed |
| CN1067706A (en) * | 1992-03-20 | 1993-01-06 | 朱国志 | Hydraulic arch support for soft-rock tunnel |
| CN201412171Y (en) * | 2009-06-19 | 2010-02-24 | 张旭东 | Sector hydraulic support system used for controlling great deformation of steel frame in tunnel construction |
-
2009
- 2009-06-19 CN CN 200910062751 patent/CN101929338B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076159U (en) * | 1990-10-13 | 1991-05-01 | 煤炭科学研究总院太原分院 | Hydraulic support substituting for shed |
| CN1067706A (en) * | 1992-03-20 | 1993-01-06 | 朱国志 | Hydraulic arch support for soft-rock tunnel |
| CN201412171Y (en) * | 2009-06-19 | 2010-02-24 | 张旭东 | Sector hydraulic support system used for controlling great deformation of steel frame in tunnel construction |
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| CN101929338A (en) | 2010-12-29 |
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Owner name: CHINA RAILROAD 11 BUREAU GROUP CO. LTD. Free format text: FORMER OWNER: ZHANG XUDONG Effective date: 20110927 |
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Effective date of registration: 20110927 Address after: 430071 Hubei city of Wuhan province Wuchang Zhongshan Road District No. 347 Applicant after: China Railroad 11 Bureau Group Co., Ltd. Address before: 430071 Hubei city of Wuhan province Wuchang Zhongshan Road District No. 347 Applicant before: Zhang Xudong |
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