CN201129184Y

CN201129184Y - Tubule external valve one-way type subsection back grouting apparatus

Info

Publication number: CN201129184Y
Application number: CNU2007201911680U
Authority: CN
Inventors: 张民庆; 李治国; 卓越; 丁锐; 南琛; 洪开荣; 张文强; 曹正喜; 付仲润
Original assignee: China Railway Tunnel Group Co Ltd CRTG
Current assignee: Technology Research of China Railway Tunnel Group Co Ltd
Priority date: 2007-12-29
Filing date: 2007-12-29
Publication date: 2008-10-08
Anticipated expiration: 2017-12-29

Abstract

The utility model belongs to the advance grouting, fixing and water shutoff technology for weak wall rock in tunnel and underground engineering. A provided small conduit pipe external valve one way segmental receding grouting device is mainly composed of a grouting pump, a grout inlet tube (1), a core tube (4) and a small conduit pipe (9) , wherein the he front end of the small conduit pipe is a pointed cone structure and sealed, a plurality of grout spilling holes (11) are arranged on the wall of the small conduit pipe (9), grooves are arranged on the pipe wall in the position of the grout spilling holes (11), metal pieces (10) are stuck in the grooves, the core tube (4) is positioned at the front end of the small conduit pipe (9), the front end of the core tube is provided with fixing cap nuts (16) which are threaded and coupled, further the front end of the core tube is provided with a gasket (13), a rubber stop-grouting plug (14) is coated between the gasket (13) and the fixing cap nuts (16), the rear end of the core tube (4) is a screw thread structure and coupled with a puller cap nut (5), a push pipe (12) is sleeved between the puller cap nut (5) and the gasket (13), the rear end of the core tube (4) is communicated with the grouting pump by the grout inlet tube (1). The advance grouting, fixing and water shutoff technology for weak wall rock in tunnel and underground engineering can meet requirements of segmental receding grouting.

Description

The outer valve one-way fashion segmentation of ductule retreats grouting device

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 the outer valve one-way fashion segmentation of a kind of ductule and retreats grouting device.

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.The grouting with small pipe method is one of main method wherein.But present grouting with small pipe method adopts the disposable slip casting in full hole usually, can't carry out segmenting slip casting as required; The ductule that is adopted is a spray of molten steel tubular structure, and in the process of heading into, silt particle enters steel pipe along the eyelet on the pipe easily, and cramming causes slip casting effect bad or annotate and not advance slurry.

Summary of the invention

The purpose of this utility model promptly is to propose the outer valve one-way fashion segmentation of a kind of ductule to retreat grouting device, makes it can satisfy the needs that segmentation retreats slip casting.

The utility model is finished the technical scheme that its invention task taked: it mainly is made of grouting pump, inlet pipe and core pipe, ductule, the ductule front end is cone-shaped and is enclosed construction, on the ductule wall, has a plurality of excessive slurries hole, on the pipe outer wall of slurry hole site that overflows, have groove and in groove, be pasted with sheet metal, play the effect of sealing of hole and one-way cock; The core pipe is positioned at the hold-down nut that its front end of ductule has thread connection, be provided with packing ring and between packing ring and hold-down nut, be nested with the rubber stop grouting plug, core pipe back segment is helicitic texture and is connected with and holds out against nut, be equipped with push pipe holding out against between nut and the packing ring, turn holds out against nut it is moved forward along the core pipe thus, can make push pipe hold out against packing ring forward and make stop grouting plug be subjected to space between compression swelling sealing core pipe and the ductule inwall, the prevention slurries pass through; Core pipe rear end is communicated with grouting pump by inlet pipe.

The utility model slip casting course of work is: adopt air drill boring to designing hole depth, withdraw from drilling rod, ductule packed into accelerated cement mouth of pipe outer wall and boring are sealed in the space between the inwall in the boring, core pipe (being equipped with push pipe) is entered in the ductule to design attitude, core pipe rear end and inlet pipe, grouting pump is communicated with, turn holds out against nut makes it move forward along the core pipe, making push pipe hold out against packing ring forward makes stop grouting plug be subjected to compression swelling upwards to hold out against the ductule inwall, gap between sealing core pipe and the ductule inwall, slurries flow out from core pipe front port during slip casting, enter between ductule and the core pipe; Because stopping of rubber stop grouting plug, slurries are washed the sheet metal at place, the excessive slurry of ductule hole open, enter the stratum by spout hole; Finish this section slip casting.Stop slip casting backward turn hold out against nut the rubber stop grouting plug restored to the original state, pull back the core pipe to next section slip casting position, stop grouting plug is squeezed once more with gap sealing between ductule and the core pipe, carry out this section grouting operation, retreat segmenting slip casting so repeatedly and finish, withdraw from the core pipe and carry out next hole mortar depositing construction up to this hole slip casting.

Adopt the utility model device can realize segmenting slip casting, make the slurries diffusion ratio more even, grouting quality is guaranteed easily, and its structure design is advantages of simple comparatively, is easy to constructing operation.

Description of drawings

Fig. 1 is the utility model structural representation.

Among the figure, 1, inlet pipe, 2, slurry-inlet valve, 3, relief valve, 4, the core pipe, 5, hold out against nut, 6, handle, 7, packing ring, 8, pipe collar, 9, ductule, 10, sheet metal, 11, the slurry hole of overflowing, 12, push pipe, 13, packing ring, 14, the rubber stop grouting plug, 15, packing ring, 16, hold-down nut.

The specific embodiment

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

As shown in Figure 1, the utility model mainly is made of grouting pump, inlet pipe 1 and core pipe 4, ductule 9; Wherein show among the grouting pump figure.Ductule 9 front ends are cone-shaped and are enclosed construction, on the ductule wall, has a plurality of excessive slurries hole 11, on the pipe outer wall of slurry hole site that overflows, have a plurality of grooves and in groove, be pasted with sheet metal 10, core pipe 4 is positioned at the hold-down nut 16 that ductule 9 its front ends have thread connection, pipe is provided with packing ring 13 and is equipped with rubber stop grouting plug 14 between packing ring 13 and hold-down nut 16, core pipe 4 back segments are helicitic texture and are connected with and hold out against nut 5, be equipped with push pipe 12 holding out against between nut 5 and the packing ring 13, hold out against nut 5 and have handle 6, in order to conveniently to hold out against the rotation of nut 5.Core pipe 4 is communicated with grouting pump by inlet pipe 1 and the inlet pipe road is provided with slurry-inlet valve 2 and relief valve 3.

Claims

1, the outer valve one-way fashion segmentation of a kind of ductule retreats grouting device, it is characterized in that: mainly constitute by grouting pump, inlet pipe (1) and core pipe (4), ductule (9), ductule (9) front end is cone-shaped and is enclosed construction, on ductule (9) wall, have a plurality of excessive slurries holes (11), on the pipe outer wall of slurry position, hole (11) that overflows, have groove and in groove, be pasted with sheet metal (10); Core pipe (4) is positioned at the hold-down nut (16) that its front end of ductule (9) has thread connection, be provided with packing ring (13) and between packing ring (13) and hold-down nut (16), be nested with rubber stop grouting plug (14), core pipe (4) back segment is helicitic texture and is connected with and holds out against nut (5), is equipped with push pipe (12) holding out against between nut (5) and the packing ring (13); Core pipe (4) rear end is communicated with grouting pump by inlet pipe (1).