JPS5883726A - Injection tube for solidifying agent - Google Patents

Abstract

PURPOSE:To stabilize a heterogenous ground by a method in which the liquids of a two-component grout are separately sent under pressure through a double injection tube, jointed and mixed in a mixing injection chamber in the lower part and also on the side wall of the injection tube, and then injected in a filmy form either in the lateral direction or in just downward direction. CONSTITUTION:The liquids A and B of a grout are separately sent under pressure to a head body 4 through the pathways 2a and 3a of an inner and outer tubes 2 and 3 and then raised gradually. A differential valve 8 fitted into the pathway 6 leading to the inner tube 2 is pushed by pressure liquids and goes down against a spring 9 to block a path 10, the differential vale is stopped, the blocking of jet nozzles 14 and 16 and a path 13 is released and connected with paths 5 and 6, a path 13 is led to the chamber 17, and the liquids from jet nozzles are injected toward the mixing injection chamber 7, jointed and mixed together by collision, and injected diffusively toward the circumferential area. Also, the liquids are injected toward the mixing injection chamber 7a by clearance nozzles 14a and 16a connected to the chamber 20 and path 5, jointed and mixed together there by collision, and injected downwardly in the form of a filmy jet stream.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solidifying agent injection tube, and includes j! More specifically, it is an injection pipe in which two-component grout is independently pumped to the tip through two liquid feeding paths, and the two-component grout is mixed in a mixing injection chamber and then injected in a jet stream.

Conventionally, chemical injection methods have been widely used to treat groundwater and strengthen the ground. However, since there are many complex multi-layered grounds, using ordinary chemical solutions that are organic in nature often causes the grout to flow underground or wet fields from the injection pipes to the ground, which may not meet the purpose. It was not sufficient to reliably improve the range of Moreover, not only is the material used more than necessary, but there is also the risk of contamination within the ground and ground upheaval. For this reason, a two-component chemical solution was developed that produces solidification and other effects only when two types of chemical solutions are mixed together, but there is no injection tube to mix them at the appropriate time, and its features are not fully utilized.

In view of the above points, the present invention solves this problem.
For example, the present invention makes it possible to fully utilize instant setting grout that shortens glue time by mixing two liquids, grout that forms a special setting structure, etc. The purpose of this invention is to provide an injection pipe that is intended to reliably and stably treat heterogeneous ground within a desired range, such as water layers and ground under pressure water.

That is, in the present invention, the injection tube is a double tube, and the two liquids flowing inside the tube are independently delivered to the tip, and the two liquids are sprayed at the tip and discharged together.In order to prevent jamming, the injection tube is rotated and the surrounding area is Injection is carried out under a pressure that does not disturb the soil structure, and the ground is improved in an area centered around the injection pipe.Alternatively, the consolidation agent is sent under high pressure and a plane flow collides with the clearance nozzle to form a high-pressure membrane jet. This system promotes the reaction of the two-component solidifying agent and raises the injection tube while preventing jamming by rocking. The injection pipe for soil improvement according to the present invention will be explained below with reference to the attached drawings WJK.

1 #i An injection tube consisting of a double pipe of an inner tube 2 and an outer tube 3, with the liquid feeding path 2a + 3m being independent so that the injection liquid can be pumped to the tip. 0 Of course, the double tube method is used for this liquid feeding path configuration. Other configurations may also be used. The double-structured injection tube 1 is attached with the head body 4 screwed onto its tip. The head body 4 is
A flow path 5 connected to the liquid feeding path 3 & from the outer tube 3 and an inner tube 20
A flow path 6 communicating with the liquid feeding path 2aK is provided, and a mixing injection chamber 7 recessed in the side wall is provided, and a differential valve 8 having a spring 9 acting thereon is slidably fitted into the lower part of the flow path 6Ktlj. The differential valve 8 resists the spring 9 due to the fluid pressure flowing through the liquid sending path 2a of No. 2.
It moves by pressing and stops by blocking the flow path 10 that communicates with the lower flow path 5 provided in the head body 4.

Note that 12 is a check valve that prevents soil particles from entering due to backflow. The differential valve 8 is provided with a circumferential groove 11 and a flow path 13 with a check valve 12 interposed therein, so that when the differential valve 8 is at the stop position, nine flows are formed toward the mixing injection chamber 7. A mixing injection chamber 7 communicates with the injection nozzle 14 communicating with the passage 6, and communicates with the passage 5 in the main body 4, which communicates with the liquid feeding passage 3a of the outer tube 3, via a connecting passageway and a circumferential groove 11. Injection nozzle 16 bored towards
Moreover, the O flow passage 13 in the differential valve 8 communicates with a chamber 17 extending in the lower part of the main body 4. Therefore, both injection nozzles 14
The material liquids jetted from the and 16 meet and collide in the mixing injection chamber 7a, forming a trap so that they can be mixed. Also, flow path 5 and chamber 1
7 connects the mixing injection chamber 7a provided in the lower part with the four hemispherical clearance nozzles 14m and 16a, respectively, so that when the liquids from the injection nozzles 14 and 16 merge and collide in the mixing chamber 7, the same occurs. The liquids injected from the clearance nozzles 14a and 16a merge and collide within the mixing and injection chamber 7a, resulting in film injection. In this case, the discharge jet pressure is high pressure, and the discharged fluid flows through the injection pipe 10 while mixing and merging.
Inject around the circumference and towards the bottom.

If the material liquid in the liquid feeding paths 2 & and 3aK of the inner and outer tubes 2 and 3 is not fed under pressure, the differential valve 8 will move upward due to the restoring action of the Sgeling ring 9 and return to its original state, and the injection nozzles 14 and 16 and the flow path 13 , the communication passage 15 is closed by the outer surface of the differential valve 8.

A crown 19 with a pit 18 attached thereto is screwed onto the tip of the head body 4Ktj.

In the present invention, a head body 4 is attached to the distal end of the injection tube 1 made of the double tube described above, and a hole is drilled to a predetermined injection position, and then the head body 4 located at the deepest part is pierced. The injection tube 1 has a discharge amount of two liquids, that is, A liquid and B liquid, from 4 to 30, i3, and the rotation speed of the injection tube is 5 to 2 Or, p, and tn.
While applying rotation, the two liquids are independently pressure-fed through the liquid feeding path 2a of the inner tube 2 and the liquid feeding path 3a of the outer tube 3 to the head main body 4 at the distal end, and are gradually raised. A channel 6 in the head body 4 that communicates with one of the inner tubes 2 by simultaneous pressure feeding of these two liquids.
The differential valve 8, which has been slid into the
The injection nozzles 14, 16 and the flow path 13Fi are stopped.
The injection nozzles 14 , 16 communicate with the channels 5 and 6 , respectively, and the channel 13 communicates with the chamber 17 , and the material from each injection nozzle 14 , 16 is unblocked by movement of the differential valve 8 , respectively. The liquid is discharged toward the mixing injection chamber 7, meets, collides, and mixes, and is diffused and injected around the double pipe. Also, a clearance nozzle 14a communicating with the chamber and the flow path 5,
16a ti Mixed injection wealth 7a The material liquid is discharged towards K, merges and collides, and jets downward as a film jet. Gluing begins, and the injection continues, and as the grout is discharged one after another, the inside of the initially formed glue sphere is destroyed before it has enough strength, creating a flow path. The grout in the uninjected part of the ground permeates radially through the channel and solidifies into a hemispherical solidified body.

As described above, the present invention isolates and pressure-feeds a two-component drug solution,
Since the liquids are made to merge and collide in the mixing and injection chambers 7 and 7&, and are ejected from the circumference and the bottom of the injection pipe, the two liquids are sufficiently mixed at the most appropriate time and fully pressure-expanded and reacted to each other, thereby enhancing the effect. This is an extremely excellent invention as an injection tube that can fully utilize the characteristics of two-component medicinal solutions, which have been considered difficult until now.

[Brief explanation of the drawing]

The drawing shows one embodiment of the solidifying agent injection pipe according to the present invention, and is a longitudinal cross-sectional view of the injection pipe that performs injection in a sideways direct downward direction. 1 - Injection pipe 2 - Inner pipe 2a - Liquid feeding path 3 - Outer pipe 38
~Liquid feeding path 4~Head body 5, 6~Flow path 7.7&~Mixing injection chamber 8~Differential valve 9~Spring 10~Flow path
11 - Circumferential groove 12 - Check valve 13 - Channel 14, 14
a~Injection nozzle t~Communication channel 16, 16 a~Injection nozzle 17~Chamber 18~Pit 19~Crown. Patent applicant Nippon Phil Industries Co., Ltd. (4 others) 2mu/7 -/Δ4

Claims (1)

[Claims] A head body is attached to the tip of the injection tube, which has two liquid feeding paths that independently force the two liquids to the tip, and has a flow path that communicates with each liquid feeding path, and a mixing injection chamber located directly below the side wall. In addition, the blade side wall side injection chamber has a flow path that slides into a flow path leading to one feed #L path and communicates with it via a differential valve, and the other O flow path, a connecting path and a differential valve. The other direct injection chamber communicates with a clearance nozzle that communicates with a flow path, and the other flow path communicates with a clearance nozzle that communicates through a differential valve, and the two liquids are combined and mixed in each injection chamber. A solidifying agent injection tube characterized in that a solidifying agent is injected in a horizontal direction and a film is jetted in a direct downward direction.