CN102644469B - Ultra-deep hole pre-grouting pipe for crack-developed surrounding rock and grouting method - Google Patents
Ultra-deep hole pre-grouting pipe for crack-developed surrounding rock and grouting method Download PDFInfo
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- CN102644469B CN102644469B CN201210142705.8A CN201210142705A CN102644469B CN 102644469 B CN102644469 B CN 102644469B CN 201210142705 A CN201210142705 A CN 201210142705A CN 102644469 B CN102644469 B CN 102644469B
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Abstract
Provided are an ultra-deep hole pre-grouting pipe for crack-developed surrounding rock and a grouting method. The ultra-deep hole pre-grouting pipe comprises a plurality of sections of grouting pipes continuously placed in a drill hole, a plurality of cross-shaped slurry-overflowing holes are drilled on the grouting pipes at intervals, the joints of the grouting pipes are provided with slurry blocking devices, and exposed ends of the grouting pipes are provided with integrated controllers. Blocking pieces are embedded in the slurry-overflowing holes and provided with blocking piece switches controlled by the integrated controllers. Each slurry blocking device comprises a slurry blocking pipe, the middle of each slurry blocking pipe is provided with a slurry controlling plate fixed through a rotating shaft and a torsion spring, the middle of each slurry blocking pipe is provided with a slurry blocking sleeve, a pipe wall of each slurry blocking pipe contacted with the slurry blocking sleeve is provided with communicated small holes, and outside threads matched with the grouting pipes are respectively arranged on pipe diameters on two sides of the slurry blocking pipes. The grouting pipes can be applied to good surrounding rock and can also be used for deep hole pre-grouting support of weak, crack-developed and broken surrounding rock, full and rapid grouting can be guaranteed, the stability of the surrounding rock is reinforced, staged and segmented grouting can be carried out, and the grouting pipes are simple and convenient to operate and good in grouting effect.
Description
Technical field
The present invention relates to a kind of cranny development country rock superdeep holes pre-grouting pipe and grouting method, especially be applicable to 30 ~ 50m superdeep holes pre-grouting supporting of tunnel weakness, cranny development and breaking surrounding rock, belong to roadway weak broken wall rock support engineering technical field.
Technical background
Weak broken wall rock pre-grouting technology in recent years at home and abroad colliery tunnel support field obtain application to a certain extent, its objective is by grouting filling wall-rock crack, by the cementing broken sillar entirety of reinforcing into, fully improve the self-bearing capacity of country rock, improve supporting effect, in the large tunnel of water yield, also can play the effect of water blockoff antiseepage.But still there is following problem in the existing Grouting Pipe in colliery: 1. traditional Grouting Pipe range of grouting and distance are limited, first slurries permeate to the crack of comparatively growing in Grouting Pipe termination, have stoped slurries to the diffusion in country rock deep and the reinforcing to hypotonicity argillaceous soft rock; 2. adopt the disposable full hole slip casting of low discharge grouting pump, concentration of slurry is fixed, and speed is slow, permeability is low, weak effect; 3. owing to lacking the control method of slip casting process, in operating process, often cause and lack note, leakage note, the requirement that does not reach grouting quality; 4. some mine, for meeting schedule requirement, arranges the operation simultaneously of a large amount of personnel and equipment, causes personnel and hold facility, and normal tunneling construction is produced to larger impact; 5. consider the feature of traditional Grouting Pipe, cannot realize the remote pre-grouting of tunnel deep hole, also cannot play good pre-supporting effect to roadway surrounding rock.Therefore, existing Grouting Pipe only meets general short-distance and medium-distance slip casting, is still in the starting stage for development and the exploitation of 30 ~ 50m superdeep holes pre-grouting pipe.
Summary of the invention
Technical problem: the object of the invention is to overcome the weak point in existing Grouting Pipe, provide a kind of simple in structure, injection speed is fast, and efficiency is high, effective superdeep holes pre-grouting pipe and grouting method for tunnel cranny development country rock.
Technical scheme: the superdeep holes pre-grouting pipe of cranny development country rock of the present invention, comprise that continued access inserts the multi-stage cementing pipe in boring, in described Grouting Pipe, interval is drilled with some excessive slurry holes that cross is arranged that are, Grouting Pipe and Grouting Pipe junction are equipped with slurry-blocking device, and the exposed junction of Grouting Pipe is provided with Centralized Controller; Described excessive slurry hole is embedded with jam, and jam is provided with the jam switch by Centralized Controller control.
Described slurry-blocking device comprises plasma resistance pipe, the middle part of plasma resistance pipe is provided with through rotating shaft and the fixing control pulpboard of torsion spring, the middle part of plasma resistance pipe is provided with plasma resistance cover, on the tube wall that plasma resistance pipe contacts with plasma resistance cover, have the aperture communicating, on the caliber of plasma resistance pipe both sides, be respectively equipped with the external screw thread matching with Grouting Pipe.
The grouting method of cranny development country rock superdeep holes pre-grouting pipe of the present invention, comprises the steps:
A. in the junction of the each Grouting Pipe of continued access, slurry-blocking device is installed, Grouting Pipe is sent in the boring of having constructed, until extend in slip casting region, in the Grouting Pipe of boring exposed junction, Centralized Controller is installed, by the multiple pre-slip casting region of Centralized Controller control Grouting Pipe segmenting slip casting, connect grouting pump;
B. choose a certain pre-slip casting region in multiple pre-slip castings region, regulate the jam switch in Grouting Pipe in the pre-slip casting of Centralized Controller control region, open the jam in pre-slip casting region; Open grouting pump slip casting, the control pulpboard rotation in most of slurries promotion slurry-blocking device enters the Grouting Pipe of choosing in pre-slip casting region and carries out slip casting; Fraction slurries enter in plasma resistance cover by the aperture in plasma resistance pipe, plasma resistance cover is expanded and seal the boring of Grouting Pipe junction; Treat that slurries are choosing in pre-slip casting region infiltration completely, slip casting reaches after setting pressure, closes grouting pump, and control pulpboard reduces to recover closed condition with Grouting Pipe internal pressure;
C. repeating step b, chooses slip casting to remaining pre-slip casting region successively;
D. after and slurries complete until all whole slip casting in slip casting region of choosing solidify completely, unload Centralized Controller, tray and nut in the Grouting Pipe of boring exposed junction, load pretightning force to Grouting Pipe.
Beneficial effect: the present invention one has overcome traditional Grouting Pipe range of grouting and apart from limited, cannot realize the problem of the remote pre-grouting supporting of tunnel deep hole, and roadway surrounding rock is played to good pre-supporting effect; The 2nd, utilize control pulpboard effectively slip casting section to be separated, avoid slurries first to permeate to the crack of comparatively growing in the initial termination of Grouting Pipe, more effectively make slurries to the diffusion in country rock deep and the reinforcing to hypotonicity argillaceous soft rock; The 3rd, adopt timesharing subregion slip casting stage by stage, realize different concentration of slurry, different grouting pressures, slip casting permeability is high, effective; The 4th, be equipped with centralized control system, can omnidistancely control slip casting process, simple to operate, accurate, can not cause to lack and note, leak note, ensure grouting quality; The 5th, save a large amount of manpower and materials, economize on resources.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is slurry-blocking device structural representation in Fig. 1;
Fig. 3 is that the A-A of Fig. 2 analyses and observe;
Fig. 4 is the slurry pore structure schematic diagram that overflows in Fig. 1;
Fig. 5-Fig. 7 is Grouting Pipe grouting method implementation step schematic diagram of the present invention.
In figure: 1-Centralized Controller, 2-Grouting Pipe, the 3-slurry hole of overflowing, 4-slurry-blocking device, 4-1-plasma resistance pipe, 4-2-plasma resistance cover, 4-3-external screw thread, 4-4-control pulpboard, 4-5-rotating shaft, 4-6-torsion spring, 5-jam switch, 6-jam.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, cranny development country rock superdeep holes pre-grouting pipe of the present invention, multi-stage cementing pipe 2, slurry-blocking device 4, jam switch 5 and the jam 6 of mainly being inserted in boring by Centralized Controller 1, continued access form.In Grouting Pipe 2, interval is drilled with some excessive slurry holes 3 that cross is arranged that are, and the junction of each section of Grouting Pipe 2 is all set with a slurry-blocking device 4, and Centralized Controller 1 is housed on the exposed junction of Grouting Pipe 2.
As shown in accompanying drawing 2 Fig. 3, described slurry-blocking device 4 comprises plasma resistance pipe 4-1, the middle part of plasma resistance pipe 4-1 is provided with through rotating shaft 4-5 and the fixing control pulpboard 4-4 of torsion spring 4-6, plasma resistance cover 4-2 is equipped with at the middle part of plasma resistance pipe 4-1, on the tube wall that plasma resistance pipe 4-1 contacts with plasma resistance cover 4-2, have the aperture communicating, on the caliber of plasma resistance pipe 4-1 both sides, be respectively equipped with the external screw thread 4-3 matching with Grouting Pipe 2.
As shown in Figure 4, in described excessive slurry hole 3, be embedded with jam 6, jam 6 is provided with the jam switch 5 of being controlled by Centralized Controller 1.
The grouting method of cranny development country rock superdeep holes pre-grouting pipe of the present invention:
A. in the junction of the each Grouting Pipe 2 of continued access, slurry-blocking device 4 is installed, Grouting Pipe 2 is sent in the boring of having constructed, until extend in slip casting region I, II, III, as shown in Figure 5, in the Grouting Pipe 2 of boring exposed junction, Centralized Controller 1 is installed, control multiple pre-slip casting region I, II, the III of Grouting Pipe 2 segmenting slip castings by Centralized Controller 1, connect grouting pump and prepare slip casting;
B. choose the pre-slip casting region I in multiple pre-slip castings region I, II, III, regulate Centralized Controller 1 to control the jam switch 5 in Grouting Pipe 2 in the I of pre-slip casting region, open the jam 6 in pre-slip casting region; Open grouting pump slip casting, the control pulpboard 4-4 rotation in most of slurries promotion slurry-blocking device 4 enters the Grouting Pipe 2 of choosing in the I of pre-slip casting region and carries out slip casting; Fraction slurries enter in plasma resistance cover 4-2 by the aperture in plasma resistance pipe 4-1, plasma resistance cover 4-2 is expanded and seal the boring of Grouting Pipe 2 junctions; Treat that slurries are choosing in the I of pre-slip casting region infiltration completely, as shown in Figure 6, slip casting reaches after setting pressure, closes grouting pump, and control pulpboard 4-4 reduces to recover closed condition with Grouting Pipe 2 internal pressures;
C. repeating step b, successively to remaining pre-slip casting region II, III is chosen slip casting, as shown in Figure 7;
D. after and slurries complete until all slip casting region II, whole slip casting of III of choosing solidify completely, unload Centralized Controller 1, tray and nut in the Grouting Pipe 2 of boring exposed junction, load pretightning force to Grouting Pipe 2.
Claims (2)
1. a cranny development country rock superdeep holes pre-grouting pipe, comprise that continued access inserts the multi-stage cementing pipe (2) in boring, it is characterized in that: the upper interval of described Grouting Pipe (2) is drilled with some excessive slurry holes (3) that cross is arranged that are, Grouting Pipe (2) is equipped with slurry-blocking device (4) with Grouting Pipe (2) junction, and the exposed junction of Grouting Pipe (2) is provided with Centralized Controller (1); Described excessive slurry hole (3) is embedded with jam (6), and jam (6) is provided with the jam switch (5) of being controlled by Centralized Controller (1);
Described slurry-blocking device (4) comprises plasma resistance pipe (4-1), the middle part of plasma resistance pipe (4-1) is provided with through rotating shaft (4-5) and the fixing control pulpboard (4-4) of torsion spring (4-6), the middle part of plasma resistance pipe (4-1) is provided with expandable plasma resistance cover (4-2), on the tube wall that plasma resistance pipe (4-1) contacts with plasma resistance cover (4-2), have the aperture communicating, on the caliber of plasma resistance pipe (4-1) both sides, be respectively equipped with the external screw thread (4-3) matching with Grouting Pipe (2).
2. the grouting method of cranny development country rock superdeep holes pre-grouting pipe according to claim 1, is characterized in that:
A. in the junction of the each Grouting Pipe of continued access (2), slurry-blocking device (4) is installed, Grouting Pipe (2) is sent in the boring of having constructed, until extend in slip casting region, at the upper Centralized Controller (1) of installing of Grouting Pipe (2) of boring exposed junction, control the multiple pre-slip casting region of Grouting Pipe (2) segmenting slip casting by Centralized Controller (1), connect grouting pump;
B. choose a certain pre-slip casting region in multiple pre-slip castings region, regulate Centralized Controller (1) to control the jam switch (5) in Grouting Pipe (2) in pre-slip casting region, open the jam (6) in pre-slip casting region; Open grouting pump slip casting, control pulpboard (4-4) rotation in most of slurries promotion slurry-blocking devices (4) enters the Grouting Pipe (2) of choosing in pre-slip casting region and carries out slip casting; Fraction slurries enter in plasma resistance cover (4-2) by the aperture in plasma resistance pipe (4-1), plasma resistance cover (4-2) is expanded and seal the boring of Grouting Pipe (2) junction; Treat that slurries are choosing in pre-slip casting region infiltration completely, slip casting reaches after setting pressure, closes grouting pump, and control pulpboard (4-4) reduces to recover closed condition with Grouting Pipe (2) internal pressure;
C. repeating step b, chooses slip casting to remaining pre-slip casting region successively;
D. after and slurries complete until all whole slip casting in slip casting region of choosing solidify completely, unload Centralized Controller (1), at the upper tray of Grouting Pipe (2) and the nut of boring exposed junction, Grouting Pipe (2) is loaded to pretightning force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210142705.8A CN102644469B (en) | 2012-05-10 | 2012-05-10 | Ultra-deep hole pre-grouting pipe for crack-developed surrounding rock and grouting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210142705.8A CN102644469B (en) | 2012-05-10 | 2012-05-10 | Ultra-deep hole pre-grouting pipe for crack-developed surrounding rock and grouting method |
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| CN102644469A CN102644469A (en) | 2012-08-22 |
| CN102644469B true CN102644469B (en) | 2014-07-16 |
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| CN103835729B (en) * | 2013-11-11 | 2016-06-15 | 北京中煤矿山工程有限公司 | Deep distance roadway surrounding rock pre grouting from the surface reinforcement process |
| CN103926393B (en) * | 2014-04-30 | 2015-07-22 | 山东大学 | Advancing segmented grouting device applicable to grouting model experiment and application method thereof |
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| CN110424995A (en) * | 2019-08-06 | 2019-11-08 | 安徽钢铮机电有限公司 | A kind of hollow grouting device and application method of multisection type slip casting |
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| CN112144505A (en) * | 2020-09-09 | 2020-12-29 | 中铁四院集团工程建设有限责任公司 | Roadbed reinforcing method |
| CN112160729B (en) * | 2020-09-28 | 2022-08-05 | 北京政平建设投资集团有限公司 | Cross hole grouting pipe |
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| CN113653509B (en) * | 2021-08-11 | 2022-04-05 | 中电建路桥集团有限公司 | Grouting pipe device capable of capturing weak area of rock mass and construction method |
| CN115928666B (en) * | 2023-01-06 | 2023-08-18 | 水利部交通运输部国家能源局南京水利科学研究院 | Panel rock-fill dam underwater panel infiltration point detection and plugging integrated device and method |
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