CN205936640U - Interior tub leading deep pre -reinforcing secant pile supporting construction in tunnel of canopy core that establishes - Google Patents

Interior tub leading deep pre -reinforcing secant pile supporting construction in tunnel of canopy core that establishes Download PDF

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Publication number
CN205936640U
CN205936640U CN201620409590.8U CN201620409590U CN205936640U CN 205936640 U CN205936640 U CN 205936640U CN 201620409590 U CN201620409590 U CN 201620409590U CN 205936640 U CN205936640 U CN 205936640U
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China
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core
canopy
supporting construction
pipe canopy
tunnel
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CN201620409590.8U
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Inventor
王丽庆
伊兴芳
侯军红
曾青
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China Railway Design Corp
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Third Railway Survey and Design Institute Group Corp
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Abstract

The utility model discloses an interior tub leading deep pre -reinforcing secant pile supporting construction in tunnel of canopy core that establishes, internal pipe canopy core is reinforced with inserting to the solid that adds including lieing in the tunnel perisporium outside, it spouts the pile cluster by interlock in a row mutual soon to add the solid. The utility model discloses an interior tub leading deep pre -reinforcing secant pile supporting construction in tunnel of canopy core that establishes, insert tube canopy core in leading deep pre -reinforcing secant pile, horizontal compressive capacity and vertical bending resistance of improvement induration satisfy the intensity and the bearing capacity requirement of induration, advance in advance behind the excavation and protect the hunch and will play a role immediately, restrain surrouding rock deformation, undertake the pressure on hunch portion stratum, guarantee cavern stability, reached the controllable purpose of construction risk. The time need not set up the studio in the construction, technological simple process, process conversion influence are disturbed less, the operation is convenient, the work efficiency has obtained the improvement, overcome the excavation construction need to wait for add that the final intensity of solid and the quality that becomes the stake can not be timely make measurings class construction process defect.

Description

Inside set the tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction of pipe canopy core
Technical field
This utility model is related to that settlement Control is relatively tight, the fine sand layer of self-stable ability extreme difference, water-rich saturated ground or stream are moulded The tunnels and underground engineering design of the soft stratums such as shape cohesive soil, technical field of construction are and in particular to set pipe canopy core in one kind Tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction.
Background technology
In recent years, with the development in tunnel and underground engineering construction scale, in fine sand layer, the rich water of self-stable ability extreme difference It is aqueous non-diagenesis stratum that the saturation soil body or stream mould the Unfavorable geology such as shape cohesive soil and the 3rd, advanced deep layer pre-reinforcement interlocking pile Technology projects because of the advantage of the consolidation effects such as settlement Control, surrouding rock deformation suppression, instead of traditional construction technique in railway, public affairs Widely apply in the municipal works such as road, subway.As western greatly visitor specially goes up white tunnel, Lan Yu Railway peach tree level ground tunnel, tall building deep visitor specially beam Achieve extraordinary effect in the engineer applied such as the railway tunnel such as mountain tunnel and Guangzhou, Beijing Metro and municipal administration, make construction Made smooth advances.Although successful Application in advanced deep layer pre-reinforcement interlocking pile technology engineering, by long and narrow cavern's headroom control System can only adopt single shaft churning technique, the quality direct relation construction safety of churning pile, exist and stop brill, broken pile, contracting in construction Footpath, pile body such as are not engaged at a series of problem, so that churning cylinder can not be mutually twisted well, pile uniformity and intensity etc. are deposited Lead to shed discontinuous in defect, leave hidden danger to construction.
Utility model content
This utility model is to solve above-mentioned problems of the prior art, more effectively, more easily separates body fat Tissue and lymph node, and provide a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core.
This utility model is to solve this problem, is adopted the technical scheme that:
A kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core, including outside tunnel perisporium Internal pipe canopy core is reinforced in the reinforcing body of side and insertion;Reinforcing body is made up of the rows of rotary churning pile being mutually twisted.
Described rotary churning pile is formed by rotary-jet motion and serosity filling effect restructuring rock mass structure, in rotary churning pile It is formed with churning boring, pipe canopy core is connected in churning boring.
What described pipe canopy core was arranged is shorter in length than churning pile length 2m.
Described pipe canopy core is adopted hot rolled seamless steel tube and is formed with screwed connection, and same section nipple quantity does not surpass Cross the 50% of steel pipe sum.
Injected hole, aperture 10~16mm, pitch of holes 15cm is bored, in quincuncial arrangement, steel pipe afterbody stays does not hole on steel pipe Only slurry section 110cm.
It is provided with steel reinforcement cage, steel reinforcement cage is made up of the cage bar of retainer ring and three diameter 20mm in steel pipe.
This utility model has the advantages and positive effects that:
The interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core of the present utility model, in advanced deep layer Pre-reinforcement interlocking pile is inserted into pipe canopy core, improves the horizontal anti-pressure ability of induration and longitudinal bending resistance, meets induration Intensity and bearing capacity require;After excavation, pre support arch will play a role immediately, suppress surrouding rock deformation, undertake arch stratum Pressure it is ensured that cavern is stable, reached the controlled purpose of construction risk.It is not required to arrange operating room, technical matters letter in construction Single, operation transformer effect disturbs less, operation facility, and work efficiency is improved, and overcoming excavation construction, to need to wait for reinforcing body final The quality of intensity and pile can not timely make the construction technology defect such as detection.
Brief description
Fig. 1 is the structural representation of the interlocking pile supporting construction of this utility model first embodiment;
Fig. 2 is the structural representation of the interlocking pile supporting construction of this utility model second embodiment.
Critical piece symbol description in accompanying drawing:
1:Tunnel perisporium 2:Reinforcing body
3:Pipe canopy core.
Specific embodiment
Referring to the drawings with instantiation to the interior tunnel advanced deep layer pre-reinforcement setting pipe canopy core of the present utility model Interlocking pile supporting construction is described in detail.Specific embodiments described below is only optimal embodiment party of the present utility model Formula, and it is not intended that to restriction of the present utility model.
Fig. 1 is the structural representation of the interlocking pile supporting construction of this utility model first embodiment.As shown in figure 1, first The tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction of pipe canopy core is set, including outside tunnel perisporium 1 in embodiment Reinforcing body 2 and insertion reinforcing body 2 in pipe canopy core 3.Reinforcing body 2 is made up of the rows of rotary churning pile being mutually twisted.Churning Stake is formed by rotary-jet motion and serosity filling effect restructuring rock mass structure, is formed with churning boring, pipe in rotary churning pile Canopy core 3 is connected in churning boring.The top half of tunnel perisporium is located in layer of sand, and the latter half is located in loess formation.Position Need reinforcement in sand in the layer tunnel, therefore.Reinforcing body 2 is arranged on the top half of tunnel perisporium, the corresponding center of circle of reinforcing body Angle is about 120 degree.
Fig. 2 is the structural representation of the interlocking pile supporting construction of this utility model second embodiment.As shown in Fig. 2 second The tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction of pipe canopy core is set, including outside tunnel perisporium 1 in embodiment Reinforcing body 2 and insertion reinforcing body 2 in pipe canopy core 3.Reinforcing body 2 is made up of the rows of rotary churning pile being mutually twisted.Churning Stake is formed by rotary-jet motion and serosity filling effect restructuring rock mass structure, is formed with churning boring, pipe in rotary churning pile Canopy core 3 is connected in churning boring.Tunnel perisporium almost all is located in layer of sand, and in this case, reinforcing body 2 almost covers The part more than substrate of tunnel perisporium, reinforcing body corresponding central angle is about 210 degree.
Wherein, what pipe canopy core 3 was arranged is shorter in length than churning pile length 2m.Pipe canopy core adopt hot rolled seamless steel tube and with Screwed connection forms, and same section nipple quantity is less than the 50% of steel pipe sum.Injected hole bored on steel pipe, aperture 10~ 16mm, pitch of holes 15cm, in quincuncial arrangement, steel pipe afterbody stays only slurry section 110cm do not holed.It is provided with reinforcing bar in steel pipe Cage, steel reinforcement cage is made up of the cage bar of retainer ring and three diameter 20mm.
This utility model is inserted into pipe canopy in advanced deep layer pre-reinforcement interlocking pile, improve induration horizontal anti-pressure ability and Longitudinal bending resistance, meets the intensity of induration and bearing capacity requires;After excavation, pre support arch will play a role immediately, suppression Surrouding rock deformation processed, undertakes the pressure on arch stratum it is ensured that cavern is stable, has reached the controlled purpose of construction risk.
Advanced deep layer pre-reinforcement interlocking pile induration is by rotary-jet motion and serosity filling effect restructuring rock mass structure Define reinforcing body, the pipe canopy core being inserted in reinforcing body, less stake footpath can make up that induration churning is uneven, broken pile, The problems such as undergauge, pile body are not engaged, is conducive to structure stress, the deformation on suppression stratum and Vault settlement;Realize flabbily simultaneously Layer big cross section mechanized construction, more traditional artificial construction's mechanization utilization rate increases substantially.
Advanced deep layer pre-reinforcement interlocking pile is plain stake, and bending resistance, shearing strength are limited in one's ability, and interlocking pile consolidation sets up pipe in vivo The construction work such as canopy effectively solves the easy broken pile of advanced deep layer pre-reinforcement interlocking pile, undergauge, pile body are not engaged or pile body is uneven Skill defect problem.
The interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core of the present utility model apply process As follows:Churning bore diameter > 10cm(General 114-127mm), after the final position that design is arrived in churning, it is replaced by Φ in time 89 pipe canopy cores(Rotary jet strengthening body completes before not solidifying), once complete steel pipe canopy by rig back work arm and continuously push Till churning boring is interior, and cement injection fills up.Pipe canopy core setting length is generally shorter than the long 2m of rotary churning pile, often saves long 4~6m (Φ 89mm, wall thickness 5mm)Hot rolled seamless steel tube and formed with screwed connection, same section nipple quantity must not exceed total steel The 50% of pipe number.Injected hole, aperture 10~16mm, pitch of holes 15cm are bored on steel pipe, in quincuncial arrangement, afterbody stays does not hole Only slurry section 110cm.And set up steel reinforcement cage in steel pipe as needed, to improve the bending resistance of conduit, steel reinforcement cage is by three Φ 20 Cage bar and retainer ring composition.
The beneficial effects of the utility model are:Construction is not required to arrange operating room, and technical matters are simple, operation transformer effect is done Disturb less, operate facility, work efficiency is improved, overcome excavation construction and need to wait for the quality of reinforcing body final strength and pile not The construction technology defect such as detection can timely be made.Enable face using this method to stablize, control cavern's deformation and settle And mechanized construction.
Above to the interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting knot setting pipe canopy core provided by the utility model Structure is described in detail, and specific case used herein to the principle of the present invention and is implemented to be set forth, above enforcement The explanation of example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that it is general for the art For logical technical staff, under the premise without departing from the principles of the invention, present aspect can also be carried out with some improvement and modify, this A little improvement and modification also fall in the protection domain of the claims in the present invention.

Claims (6)

1. a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core it is characterised in that:This structure bag Include positioned at tunnel perisporium(1)The reinforcing body in outside(2)With insertion reinforcing body(2)Interior pipe canopy core(3);Reinforcing body(2)By becoming The rotary churning pile composition being mutually twisted of row.
2. a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core according to claim 1, It is characterized in that:Rotary churning pile is formed, shape in rotary churning pile by rotary-jet motion and serosity filling effect restructuring rock mass structure Become to have churning to hole, pipe canopy core is connected in churning boring.
3. a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core according to claim 1, It is characterized in that:What pipe canopy core was arranged is shorter in length than churning pile length 2m.
4. a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core according to claim 3, It is characterized in that:Pipe canopy core is adopted hot rolled seamless steel tube and is formed with screwed connection, and same section nipple quantity is less than The 50% of steel pipe sum.
5. a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core according to claim 4, It is characterized in that:Injected hole, aperture 10~16mm, pitch of holes 15cm is bored, in quincuncial arrangement, steel pipe afterbody stays and do not bore on steel pipe Only slurry section 110cm in hole.
6. a kind of interior tunnel advanced deep layer pre-reinforcement interlocking pile supporting construction setting pipe canopy core according to claim 5, It is characterized in that:It is provided with steel reinforcement cage, steel reinforcement cage is made up of the cage bar of retainer ring and three diameter 20mm in steel pipe.
CN201620409590.8U 2016-05-09 2016-05-09 Interior tub leading deep pre -reinforcing secant pile supporting construction in tunnel of canopy core that establishes Active CN205936640U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867693A (en) * 2018-07-18 2018-11-23 中铁十二局集团第二工程有限公司 The construction method of existing pipe gallery reinforcement protection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867693A (en) * 2018-07-18 2018-11-23 中铁十二局集团第二工程有限公司 The construction method of existing pipe gallery reinforcement protection

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Address after: 300142 Hebei District, Zhongshan Road, No. 10,

Patentee after: China Railway Design Group Limited

Address before: 300142 Hebei District, Zhongshan Road, No. 10,

Patentee before: China Railway Third Survey and Design Institute Group Ltd.