CN201133248Y

CN201133248Y - Orifice sealed double tube back type grouting device

Info

Publication number: CN201133248Y
Application number: CNU2007201911661U
Authority: CN
Inventors: 李治国; 徐海廷; 孙国庆; 牟松; 万姜林; 王全胜; 肖红渠; 肖盛能; 刘坤昊; 周彦军
Original assignee: China Railway Tunnel Group Co Ltd CRTG
Current assignee: China Railway Tunnel Group Co Ltd CRTG
Priority date: 2007-12-29
Filing date: 2007-12-29
Publication date: 2008-10-15
Anticipated expiration: 2017-12-29

Abstract

The utility model provides a orifice seal double-pipe retrusive grouting device, including a drill stem, a drill head, an orifice pipe (11), a grout stop cylinder (8), a grout stop plug (7), a grout grouting pipe (1) and a soluble glass grouting pipe (4). The drill stem is a double-layer bushing structure composed of an internal pipe (2) and an external pipe (3). The internal pipe is communicated with the grout grouting pipe (1) and the external pipe is communicated with the soluble glass grouting pipe. The internal pipe (2) is communicated with a mixing cavity at the back end of the drill head and is provided with a plug (17). The external pipe (3) is communicated with the mixing cavity via an orifice drilled by the drill head. One end of the orifice pipe is arranged in the orifice of a bore and is fixed on the orifice wall by an anchoring agent (12). The other end of the orifice pipe is arranged outside of the bore and is linked with the grout stop cylinder by a joint. The grout stop plug is arranged inside the grout stop cylinder. A large diameter pipe at the back end of the grout stop cylinder of reducer pipe structure is linked with a hollow pressure plate (5) by a flange. The utility model can solve the sticking problem in the double-pipe grouting process, ensure the grouting pressure and improve grouting quality.

Description

Orifice sealed double-pipe retrusive grouting equipment

Technical field

The utility model belongs to the tunnel and underground construction weak surrounding rock pre-grouting is reinforced and water-plugging technique, mainly proposes a kind of Orifice sealed double-pipe retrusive grouting equipment.

Background technology

In weak water bearing ground, carry out tunnel and underground engineering construction, the problem of easy appearance is the country rock large deformation and caves in and excavate face water burst, prominent mud, jeopardize personnel, device security, cause casualty accident, cause that the face of land caves in when serious, vegetation deterioration influences resident's normal life, and ground environment is damaged.In order to guarantee construction safety, stratum consolidation and shutoff method commonly used both at home and abroad at present are slip casting method, slip casting method is exactly by certain pressure a certain amount of gelling material to be injected the rock stratum or the soil body, make that it flows in formation fractures or soil body space, diffusion, filling, fixed, be formed with the adhesive bond of certain intensity and low permeability, strengthening stratum, shutoff underground water, thereby improve the self-stabilization time of country rock, for applying of supporting and protection structure creates conditions.According to the difference of slip casting principle, technology, equipment, the leading reinforcement means in stratum relatively more commonly used both at home and abroad at present has single pipe method and double-tube method.Single pipe method slip casting is to mix in single tube, if the slurries gel time is too short, and then plugging easily; If gel time is longer, it is too far away that slurries spread easily, cause unnecessary loss, and in the bigger place of underground water, slurries is diluted easily.General double-tube method slip casting, when boring, silt, stone etc. enters interior pipe easily, and pipe clamp bores, twists in causing; In addition, do not install sealing device in the position, aperture, slurries flow out from the position, aperture easily, are difficult to control grouting pressure and grouting quality.

Summary of the invention

The purpose of this utility model is to propose a kind of Orifice sealed double-pipe retrusive grouting equipment, solves the bit freezing problem when two-tube slip casting, and grouting pressure can be guaranteed, and improves grouting quality.

The utility model is finished the technical scheme that its invention task taked: it mainly comprises drilling rod, drill bit, orifice tube, ends slurry tube, stop grouting plug, cement paste Grouting Pipe, water glass Grouting Pipe; Drilling rod is the double-layer sleeve structure that interior pipe and outer tube constitute, and its interior pipe is communicated with the cement paste Grouting Pipe, outer tube is communicated with the water glass Grouting Pipe; In pipe be communicated with the hybrid chamber of drill bit rear end and plug be set, wash open in order to cement paste when the slip casting and enter the stratum after plug enters hybrid chamber and the water glass slurries mix; Outer tube is communicated with hybrid chamber by the hole that bit body sets; Orifice tube one end is positioned at the aperture of boring and is fixed on the hole wall by the anchoring agent, the other end is positioned at outside the boring and by joint and connects only slurry tube, end on the slurry tube and have the deslagging outlet valve, end in the slurry tube stop grouting plug is set, stop grouting plug is the hollow frustum structure by hole enlargement behind the forward direction, and only slurry tube its rear end large-diameter pipe of reducer pipe structure connects with the hollow platen by flange makes stop grouting plug be compressed by the hollow platen.

The utility model slip casting course of work: bore shallow bore hole by rig, withdraw from drilling rod, in drilling orifice, install and fix orifice tube, and only slurry tube, stop grouting plug etc. are gone up in connection; The flange plate bolt that counter-rotating connects with the hollow platen, loosen stop grouting plug, continue boring to designing at the bottom of the hole behind the position (the edge joint long drill pipe is bored on the limit), tightening flange plate bolt makes the hollow platen compress stop grouting plug, it is expanded seals tight drilling rod and ends the gap of starching between the tube inwall, mud and the water glass confession slurry valve of fetching boiling water begins for slurry, cement paste is washed open forward by pipe in the drilling rod and enter the stratum after plug enters hybrid chamber and the water glass slurries that enter by outer tube mix in hybrid chamber, and drilling rod backs away in the slip casting process.(orifice tube is stayed in the boring) all unloaded grouting device in slip casting after finishing, withdraw from drilling rod, can begin the slip casting of creeping in next hole.

Its structure design of the device that the utility model proposes is simple, and is easy and simple to handle, solved the bit freezing problem in the boring procedure in the prior art, not only improved grouting quality, and reduced the borehole engineering amount, improved slip casting efficient.

Description of drawings

Fig. 1 is the utility model device working state schematic representation.

Fig. 2 is an A part enlarged drawing among Fig. 1.

Among the figure, 1, the cement paste Grouting Pipe, 2, interior pipe, 3, outer tube, 4, the water glass Grouting Pipe, 5, the hollow platen, 6, flange, 7, stop grouting plug, 8, end the slurry tube, 9, deslagging outlet valve, 10, joint, 11, orifice tube, 12, anchoring agent, 13, wall for grouting, 14, boring, 15, drill bit, 16, stop step, 17, plug.

The specific embodiment

In conjunction with the accompanying drawings the utility model embodiment is illustrated:

As shown in Figure 1 and Figure 2, the utility model device mainly comprises drilling rod, drill bit 15, orifice tube 11, ends slurry tube 8, stop grouting plug 7, cement paste Grouting Pipe 1, water glass Grouting Pipe 4; Drilling rod is the double-layer sleeve structure that interior pipe 2 and outer tube 3 constitutes, and pipe 2 is communicated with cement paste Grouting Pipe 1 in it, outer tube 3 is communicated with water glass Grouting Pipe 4; Drill bit 15 rear ends have hybrid chamber, in pipe 2 front ends be connected with hybrid chamber, plug 17 is set in cavity, what plug was positioned at the bit body setting stops step 16 front portions, thereby guarantee when boring silt particle etc. can't enter in the drilling rod, and cement paste is washed plug forward open during slip casting.Outer tube 3 front ends are communicated with hybrid chamber by the hole that sets on the bit body.Orifice tube 11 1 ends are positioned at the aperture of boring and are fixed on the hole wall by anchoring agent 12, the other end is positioned to hole outer and pass through joint 10 and connects only slurry tube 8, end on the slurry tube 8 and have deslagging outlet valve 9, end in the slurry tube 8 stop grouting plug 7 is set, stop grouting plug 7 is the hollow frustum structure by hole enlargement behind the forward direction, and only slurry tube its rear end large-diameter pipe of reducer pipe structure connects with hollow platen 5 by flange makes stop grouting plug 7 be compressed by the hollow platen.

Claims

1, a kind of Orifice sealed double-pipe retrusive grouting equipment is characterized in that: mainly comprise drilling rod, drill bit, orifice tube (11), end slurry tube (8), stop grouting plug (7), cement paste Grouting Pipe (1), water glass Grouting Pipe (4); Drilling rod is the double-layer sleeve structure that interior pipe (2) and outer tube (3) constitute, and its interior pipe (2) is communicated with cement paste Grouting Pipe (1), outer tube (3) is communicated with water glass Grouting Pipe (4); In pipe (2) be communicated with the hybrid chamber of drill bit rear end and plug (17) be set; Outer tube (3) is communicated with hybrid chamber by the hole that bit body sets; Orifice tube (11) one ends are positioned at the aperture of boring and are fixed on the hole wall by anchoring agent (12), the other end is positioned at outside the boring and by joint and connects only slurry tube (8), end on the slurry tube (8) and have deslagging outlet valve (9), end in the slurry tube (8) stop grouting plug (7) is set, stop grouting plug (7) is the hollow frustum structure by hole enlargement behind the forward direction, and only slurry tube (8) its rear end large-diameter pipe of reducer pipe structure connects with hollow platen (5) by flange makes stop grouting plug be compressed by the hollow platen.