CN108193693A - A kind of orientation given layer grouting sleeve valve pipe and grouting method - Google Patents

Abstract

The invention discloses a directional fixed-layer grouting sleeve valve pipe and a grouting method. The sleeve valve pipe includes an inner pipe, an outer pipe and a plurality of rubber rings; one side of the outer pipe is arranged at equal intervals from bottom to top to produce grout The upper end of the grouting hole at the top of the outer tube is provided with an internal thread; the inner tube is embedded in the outer tube and a plurality of grouting holes with the same aperture are arranged at equal intervals on the side of the lower end, and the grouting holes at the top of the inner tube The upper end is provided with an external thread matched with the internal thread, and the bottom end of the inner tube is closed; the rubber ring is set on the outer tube and sealed on the pulp hole, and a small hole is opened at the position of the rubber ring corresponding to the pulp hole. The inner and outer pipes are provided with cooperating threads, and the inner pipe can rotate and move up and down in the outer pipe, thereby realizing directional and fixed soil layer grouting.

Description

A directional fixed layer grouting sleeve valve pipe and grouting method

technical field

The invention belongs to the technical field of geotechnical engineering grouting, and in particular relates to a directional and layer-fixed grouting sleeve valve pipe and a grouting method.

Background technique

The French Soletanche foundation engineering company invented the Soletanche repair method in the 1950s, which is a relatively advanced grouting construction technology. China has carried out a series of research and development on it after its introduction, and called it the sleeve valve pipe grouting method. Because the sleeve valve pipe grouting method can carry out fixed depth, quantitative, fixed degree, fixed section, intermittent and repeated grouting, it combines the advantages of compaction grouting, penetration grouting and splitting grouting, and is now widely used in China. outside civil engineering.

Most of the existing sleeve valve pipes use the method of pressure spraying grout to carry out grouting reinforcement in all directions of all soil layers within the drilling depth range, and it is impossible to accurately carry out specific direction grouting on the soil layer at the specified depth and within a certain thickness range. grouting reinforcement. For some projects that only need to be reinforced by grouting in a specific direction and depth position, and within a specified thickness range, if the sleeve valve pipe is used for construction, on the one hand, the construction difficulty will be increased, and on the other hand, the raw material will be damaged. waste. At the same time, due to the additional grouting of the land that does not need to be reinforced, the pollution to the geological environment is increased.

Contents of the invention

The present invention aims at the deficiency of existing sleeve valve pipe grouting, and provides a directional fixed layer grouting sleeve valve pipe and a grouting method, which can realize directional and fixed soil layer grouting, simple structure, strong bending resistance, Strong practicality.

The invention provides a directional fixed-layer grouting sleeve valve pipe, which includes an inner pipe, an outer pipe and a plurality of rubber rings; on one side of the outer pipe, several grout holes with the same aperture are arranged at equal intervals from bottom to top. The uppermost grout hole of the outer pipe is provided with an internal thread; the inner pipe is embedded in the outer pipe and a plurality of grouting holes with the same aperture are arranged at equal intervals on the side of the lower end of the inner pipe; An external thread matching the internal thread is provided above the slurry hole, and the bottom end face of the inner tube is closed; the rubber ring is set on the outer tube and sealed on the slurry outlet, and the rubber ring corresponds to A small hole is opened at the position of the pulp outlet.

In the directional and layered grouting sleeve valve tube of the present invention, the length of the inner tube is greater than that of the outer tube.

In the directional and layered grouting sleeve valve pipe of the present invention, the inner pipe and the outer pipe are both made of PVC material.

In the directional and layered grouting sleeve valve pipe of the present invention, the outer wall of the inner pipe is provided with scale lines, and the direction of the scale lines is opposite to the direction of the grouting hole.

The present invention also provides a grouting method for a directional and layered grouting sleeve valve pipe, comprising the following steps:

Step 1: Carry out vertical drilling of mud retaining wall on the foundation soil;

Step 2: Pump the configured casing material through the drill pipe to the bottom of the drill pipe, and then pour the casing material from top to bottom;

Step 3: After the casing material is poured, vertically press the directional and fixed-layer grouting sleeve valve pipe into the borehole, and make the directional and fixed-layer grouting sleeve valve pipe be located at the center of the drill hole ;

Step 4: According to the position of the formation that needs to be reinforced, rotate the inner pipe to adjust the inner pipe to the corresponding formation position according to the scale, so that the grouting hole of the inner pipe corresponds to the grouting hole of the outer pipe;

Step 5: putting a grouting core pipe with double plugs into the inner pipe for grouting;

Step 6: Constantly adjust the upper and lower positions of the inner pipe by rotating the inner pipe so that the inner pipe reaches the corresponding grouting position, and complete the directional grouting operation for different formations.

A directional and fixed-layer grouting sleeve valve tube and a grouting method of the present invention, the sleeve valve tube adopts the design of inner and outer double tubes, which can effectively strengthen the bending resistance of the sleeve valve tube; Grouting of soil layers at a specific depth and within a specific thickness range. Moreover, the design that grouting can only be done when the grouting hole of the inner pipe is aligned with the grouting hole of the outer pipe can realize grouting in a specific direction, and grouting can be avoided for soil layers that do not need all-round reinforcement. Resources are saved and costs are reduced; the invention is simple in operation, strong in practicability, and reduces unnecessary pollution to the geological environment.

Description of drawings

Fig. 1 is a perspective view of a directional and layered grouting sleeve valve pipe of the present invention;

Fig. 2 is a perspective view of the inner pipe of a directional and layered grouting sleeve valve pipe of the present invention;

Fig. 3 is a perspective view of an outer tube of a directional and layered grouting sleeve valve tube of the present invention.

Detailed ways

As shown in FIGS. 1 to 3 , a directional and layered grouting sleeve valve tube of the present invention includes an inner tube 1 , an outer tube 2 and a plurality of rubber rings 3 . A number of slurry outlet holes 21 with the same diameter are arranged at equal intervals from bottom to top on one side of the outer tube 2 , and an internal thread 22 is provided above the topmost slurry outlet hole 21 of the outer tube 2 . The inner pipe 1 is embedded in the outer pipe 2, and a plurality of grouting holes 11 with the same aperture are arranged at equal intervals on one side of its lower end, and above the topmost grouting hole 11 of the inner pipe 1, there is a groove corresponding to the inner thread 22. With the matched external thread 12, the bottom end face of the inner pipe 1 is closed. The rubber ring 3 is sleeved on the outer tube 2 and sealed on the pulp outlet 21 , and a small hole is opened on the rubber ring 3 corresponding to the pulp outlet 21 . The inner pipe 1 can rotate in the outer pipe 2 and move up and down to realize directional and fixed soil layer grouting.

Both the inner pipe 1 and the outer pipe 2 are made of PVC material. The length of the inner tube 1 is greater than the length of the outer tube 2 . A scale line 13 is provided on the outer wall of the inner tube 1 , and the direction of the scale line 13 is opposite to that of the grouting hole 11 . During specific implementation, the inner pipe 1 is provided with a scale line 13 every 0.1m, and the operator can lift the inner pipe according to the construction requirements and adjust it to the corresponding grouting height. The head of the inner pipe 1 is provided with a direction of rotation, and the grouting hole 11 of the inner pipe 1 is just opposite to the grouting hole 21 of the outer pipe 2 after the inner pipe 1 rotates half a turn.

A kind of grouting method of directional fixed layer grouting sleeve valve pipe of the present invention, comprises the following steps:

Step 1: Carry out vertical drilling of mud retaining wall on the foundation soil;

Step 2: Pump the configured casing material through the drill pipe to the bottom of the drill pipe, and then pour the casing material from top to bottom;

Step 3: After the casing material is poured, vertically press the directional and fixed-layer grouting sleeve valve pipe into the borehole, and make the directional and fixed-layer grouting sleeve valve pipe be located at the center of the drill hole ;

Step 4: According to the position of the formation that needs to be reinforced, rotate the inner pipe to adjust the inner pipe to the corresponding formation position according to the scale, so that the grouting hole of the inner pipe corresponds to the grouting hole of the outer pipe;

Step 5: putting a grouting core pipe with double plugs into the inner pipe for grouting;

Step 6: Constantly adjust the upper and lower positions of the inner pipe by rotating the inner pipe so that the inner pipe reaches the corresponding grouting position, and complete the directional grouting operation for different formations.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the idea of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the present invention. within the scope of protection.

Claims (5)

1. a kind of orientation given layer grouting sleeve valve pipe, which is characterized in that including inner tube, outer tube and multiple elastic tapes；The outer tube one Side is equally spaced the identical slurry outlet in several apertures from the bottom to top, is equipped with above the top slurry outlet of the outer tube interior Screw thread；Said inner tube is embedded in the outer tube and is equally spaced the identical injected hole in multiple apertures in its lower end side, in institute It states and is equipped with above the top injected hole of inner tube and the matched external screw thread of the internal thread, the closing of inner tube bottom end face；It is described Elastic tape is set on the outer tube and is sealed on the slurry outlet, the elastic tape correspond to pulp hole site offer it is small Hole.

2. orientation given layer grouting sleeve valve pipe as described in claim 1, which is characterized in that the length of said inner tube is more than outer tube Length.

3. orientation given layer grouting sleeve valve pipe as described in claim 1, which is characterized in that said inner tube and outer tube use PVC Material is made.

4. orientation given layer grouting sleeve valve pipe as described in claim 1, which is characterized in that said inner tube outer wall is equipped with graduation mark, And the setting direction of graduation mark is opposite with injected hole direction.

5. a kind of grouting method for orienting given layer grouting sleeve valve pipe, which is characterized in that include the following steps：

Step 1：Mud off vertical drilling is carried out on foundation soil；

Step 2：The sleeve shell material being configured is pumped to the bottom hole of the drilling rod by drilling rod, then from top to bottom to the sheath body Material is irrigated；

Step 3：After the sleeve shell material perfusion, orientation given layer grouting sleeve valve pipe is vertically pressed into the drilling, and make institute State the center that orientation given layer grouting sleeve valve pipe is located at the drilling；

Step 4：Inner tube according to scale is adjusted to corresponding position of stratum, made by the position of stratum reinforced as needed, rotating inner tube The injected hole of inner tube and the slurry outlet of outer tube are corresponding；

Step 5：The slip casting core pipe that the double plugs of band are put into said inner tube carries out slip casting；

Step 6：The upper-lower position of inner tube is constantly adjusted by rotating inner tube makes inner tube reach corresponding slip casting position, completes to not With the orientation slip casting operation on stratum.