CN201412170Y - Mechanical support system used for controlling great deformation of steel frame in tunnel construction - Google Patents
Mechanical support system used for controlling great deformation of steel frame in tunnel construction Download PDFInfo
- Publication number
- CN201412170Y CN201412170Y CN200920086743XU CN200920086743U CN201412170Y CN 201412170 Y CN201412170 Y CN 201412170Y CN 200920086743X U CN200920086743X U CN 200920086743XU CN 200920086743 U CN200920086743 U CN 200920086743U CN 201412170 Y CN201412170 Y CN 201412170Y
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- tunnel
- support system
- steel
- steelframe
- support
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Abstract
A mechanical support system used for controlling great deformation of a steel frame in tunnel construction is characterized in that a steel box base (1) is fixed at the middle part of the ground inside a tunnel; a plurality of lift weightlifting screws (6) with steel sleeves (5) at the top parts are embedded in the steel box base (1) and connected with a mechanical jack; and support rods (2) matched with the steel sleeves (5) and arranged in the steel sleeves (5) are connected with a support steel frame (3). When a primary support deforms greatly under the pressure of surrounding rocks of thetunnel, the mechanical support system can be mounted fast and effectively provide stable anchorage force to the system, and then prevents reworking caused by the landslide and the intrusion into tunnel clearance by the deformed support. The mechanical support system also can be mounted to prevent excessively great deformation, ensure the safety in tunnel construction and save engineering cost whennormal advancement and excavation of bottom bench of the tunnel are carried out.
Description
Technical field
The utility model relates to tunnel construction equipment, is a kind of fan-shaped mechanical support system that has box-shaped base steel seat in order to control tunnel preliminary bracing steel frame deformation specifically.
Background technology
In construction of tunnel, the weak surrounding rock large cross-section tunnel excavation methods (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 steelframe) is installed, and sprayed mortar, and sprayed mortar.Excavation is got out of a predicament or an embarrassing situation and inverted arch then, 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, tend to cause Tunnel Landslide; Perhaps the steelframe of distortion is invaded tunnel space, just the steelframe of distortion need be removed and change, and in changeing the steelframe process, also usually brings out landslide.No matter be landslide or change steelframe that the engineering cost of generation is all bigger, 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 thickness of structure, come controlled deformation on the surface of original sprayed mortar.
2. on steelframe, increase interim the support.The interim supporting rods that support the on-the-spot interim processing of many employings, the section form of rod member has i iron, round steel pipe etc.Braced structures adopts truss-like or single-point to 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 interim method that supports on steelframe, have the engineering time weak point, and force mechanism is clear and definite clear, and effect is obvious, and braced structures can be reused, advantages such as good economy performance.But these interim supports mostly are the interim processing of the on-the-spot existing material of employing (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.Handle if on original ground, carry out ground, waste time and energy, take valuable time.
2. support is bad with contacting of steelframe, adopts timber wedge etc. more, can not guarantee evenly stressed
3. can not provide prestressing force
4. single-point supports, and can not form stable support system
5. processing, installation inconvenience
Summary of the invention
The purpose of this utility model is to address the above problem, provide can Fast Installation the fan-shaped support system that acts on the tunnel steelframe, be the constructing tunnel temporary supporting system efficiently of providing convenience.
The mechanical support system agent structure that is used to control the steelframe large deformation in the described constructing tunnel is made up of support unit and box-shaped pedestal that steel pipe constitutes, support unit is made up of weight lifting screw rod and steel pipe, it is characterized in that: the fixing steel case pedestal in ground middle part in the tunnel, the ascending/decending weight lifting screw rod that on steel case pedestal, is connected a plurality of tops band steel bushing with bolt with flange, the weight lifting screw rod connects mechanic jacks, is connected with the supporting steelframe with the support bar that steel bushing is nested.
As the embodiment of native system, following prioritization scheme is arranged: described steel case pedestal is fixed by the steel pipe anchoring pile of being driven underground.
Each ascending/decending weight lifting screw rod on the described steel case pedestal adopts independently mechanic jacks control.
There is oblique connecting rod to support mutually between the support system of many Pin that steel case pedestal and support bar constitute.One Pin support system is by a steel case pedestal and entrained a plurality of weight lifting screw rods 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, can strengthen the stability of support system.
The weight lifting screw rod of a band steel bushing and a support bar constitute a support unit, and the support unit steel pipe is connected with sleeve with the weight lifting screw rod; The weight lifting screw rod adopts flange to be connected with bolt with pedestal, and attached connection rod member adopts pin to connect, to realize conveniently installation.
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 tunnel preliminary bracing steel frame deformation, prevent because the Tunnel Landslide that supporting bearing capacity deficiency 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 utility model has shortened greatly installs the interim set-up time of supporting in the constructing tunnel, and can increase substantially the quality and the stability of interim support.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, increased the reliability that supports greatly.Simultaneously, by mechanic jacks independently, can regulate the support force of each point, and can apply prestressing force 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 the emergency set that guarantees the tunnel safety construction again, significantly reduced the cost of protection system simultaneously.For guaranteeing safety for tunnel engineering, prevent that the Tunnel Landslide that tunnel preliminary bracing distortion brings is significant.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram,
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-weight lifting screw rod, 7-connecting rod, top, 8-tunnel.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified: the utility model is applicable to that the deflection when the constructing tunnel steelframe surpasses expection, 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 bow member when sharply changing.
Be used to control the mechanical support system of steelframe large deformation in the described constructing tunnel, in these cases, the fixing steel case pedestal 1 in ground middle part in the tunnel, on steel case pedestal 1, be embedded with the ascending/decending weight lifting screw rod 6 of a plurality of tops band steel bushing 5, weight lifting screw rod 6 connects mechanic jacks, is connected with supporting steelframe 3 by supporting support bar 2 in the steel bushing 5.
Described steel case pedestal 1 can be fixing by the anchoring pile 4 of being driven underground.
Each ascending/decending weight lifting screw rod 6 on the described steel case pedestal 1 adopts independently mechanic jacks control.
There is oblique connecting rod 7 to support mutually between the support system of many Pin that steel case pedestal 1 and support bar 2 constitute.Connect rod member and adopt pin to connect, conveniently to install.
Erection sequence: steel case pedestal 1 is installed in the steelframe position of at first aliging, supporting rod is installed then, connect jack, stretch out weight lifting screw rod 6 at the supporting rod control of installing, apply prestressing force and reach design load, after the support system of a steel case of installation pedestal 1, the steelframe correspondence position of support need be installed at the next one another steel case pedestal 1 is installed, so whole fan-shaped support system is finished in circulation.
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 with steel case pedestal 1.
When many groups support system is used simultaneously, adopt the connection rod member that pedestal and support bar are linked together, increase globality.
The utility model can also pass through manometric reading 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. be used to control the mechanical support system of steelframe large deformation in the constructing tunnel, it is characterized in that: the fixing steel case pedestal (1) in ground middle part in the tunnel, on steel case pedestal (1), be embedded with the ascending/decending weight lifting screw rod (6) of a plurality of top band steel bushings (5), weight lifting screw rod (6) connects mechanic jacks, is connected with supporting steelframe (3) with the support bar (2) that steel bushing (5) is nested.
2. be used to control the mechanical support system of 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 to control the mechanical support system of steelframe large deformation in the constructing tunnel according to claim 1, it is characterized in that: each the ascending/decending weight lifting screw rod (6) on the described steel case pedestal (1) adopts independently mechanic jacks control.
4. be used to control the mechanical support system of steelframe large deformation in the constructing tunnel according to claim 1, it is characterized in that: have oblique connecting rod (7) to support mutually between the support system of many Pin that steel case pedestal (1) and support bar (2) constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920086743XU CN201412170Y (en) | 2009-06-19 | 2009-06-19 | Mechanical support system used for controlling great deformation of steel frame in tunnel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920086743XU CN201412170Y (en) | 2009-06-19 | 2009-06-19 | Mechanical support system used for controlling great deformation of steel frame in tunnel construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201412170Y true CN201412170Y (en) | 2010-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920086743XU Expired - Fee Related CN201412170Y (en) | 2009-06-19 | 2009-06-19 | Mechanical support system used for controlling great deformation of steel frame in tunnel construction |
Country Status (1)
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|---|---|
| CN (1) | CN201412170Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322277A (en) * | 2011-07-22 | 2012-01-18 | 山东大学 | Preliminary lining construction device and method for underground engineering model test |
| CN104121030A (en) * | 2014-07-15 | 2014-10-29 | 山东科技大学 | Shed type support prestress applying device |
| CN108005695A (en) * | 2018-01-31 | 2018-05-08 | 中铁北京工程局集团第工程有限公司 | The fast-supporting device and method of branch large deformation at the beginning of for punishing tunnel weak surrounding rock |
| CN111852511A (en) * | 2020-07-21 | 2020-10-30 | 蒋贵伟 | Quick grouting equipment of tunnel construction |
| CN114109445A (en) * | 2021-11-07 | 2022-03-01 | 重庆交通大学 | Long-span tunnel full-section construction method for reducing span by utilizing temporary vertical supports |
-
2009
- 2009-06-19 CN CN200920086743XU patent/CN201412170Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322277A (en) * | 2011-07-22 | 2012-01-18 | 山东大学 | Preliminary lining construction device and method for underground engineering model test |
| CN104121030A (en) * | 2014-07-15 | 2014-10-29 | 山东科技大学 | Shed type support prestress applying device |
| CN104121030B (en) * | 2014-07-15 | 2016-05-11 | 山东科技大学 | A kind of canopy cribbing prestress application device |
| CN108005695A (en) * | 2018-01-31 | 2018-05-08 | 中铁北京工程局集团第工程有限公司 | The fast-supporting device and method of branch large deformation at the beginning of for punishing tunnel weak surrounding rock |
| CN111852511A (en) * | 2020-07-21 | 2020-10-30 | 蒋贵伟 | Quick grouting equipment of tunnel construction |
| CN114109445A (en) * | 2021-11-07 | 2022-03-01 | 重庆交通大学 | Long-span tunnel full-section construction method for reducing span by utilizing temporary vertical supports |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20140619 |
|
| EXPY | Termination of patent right or utility model |