CN112900490A

CN112900490A - Deformation joint grouting and leaking stoppage subway structure water leakage treatment method

Info

Publication number: CN112900490A
Application number: CN202110091955.2A
Authority: CN
Inventors: 齐斐明; 张连军; 张伟琪; 孔令瑞
Original assignee: Beijing Suidun Municipal Construction Co ltd
Current assignee: Beijing Suidun Municipal Construction Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-06-04

Abstract

The application relates to a deformation joint grouting and leaking stoppage subway structure water leakage treatment method, which relates to the field of subway structure water leakage treatment and comprises the following steps: s1, determining a leakage point; s2, preparing slurry; s3, drilling; s4, installing a grouting nozzle; and S5, grouting. This application has the effect of convenient to the leaking point shutoff.

Description

Deformation joint grouting and leaking stoppage subway structure water leakage treatment method

Technical Field

The application relates to the field of subway structure water leakage treatment, in particular to a deformation joint grouting and leaking stoppage subway structure water leakage treatment method.

Background

In the construction of the subway station, workers need to spend a long time to construct the tunnel underground.

In view of the above-mentioned related arts, the inventor found that, when a construction site is located in a river erosion accumulation area, since the construction site is close to a river channel and a barrage is arranged at a position about 100 meters downstream of the river channel, water in the river channel is accumulated in a downstream direction of the construction site all the year around, so that a large amount of water is contained in a soil layer, and once a building structure, such as a construction joint, a shrinkage crack, and the like, occurs, water in the soil leaks through a leakage point.

Disclosure of Invention

In order to repair and treat the leakage position of the subway main structure conveniently, the application provides a deformation joint grouting and leakage stoppage subway structure leakage water treatment method.

The application provides a deformation joint grouting and leaking stoppage subway structure water leakage treatment method adopts the following technical scheme:

a deformation joint grouting and leaking stoppage subway structure water leakage treatment method comprises the following steps:

s1, determining a leakage point;

determining the depth and width of the leakage point to obtain the data of the leakage point;

s2, preparing slurry;

preparing acrylic resin grouting liquid and epoxy resin modified grouting liquid;

s3, drilling;

drilling holes directly at the leakage points, wherein the hole depth is greater than 2/3 of the thickness of the structural layer and less than the whole thickness of the structural layer;

s4, installing a grouting nozzle;

a grouting nozzle is arranged on the grouting hole;

s5, grouting:

injecting acrylic resin grouting liquid for water stopping, and then injecting epoxy resin modified grouting liquid for water stopping and reinforcing the leakage part;

when the grout circulates in the pipe, the hole is successfully grouted, and the adjacent grouting hole can be shifted to continue grouting.

Through adopting above-mentioned technical scheme, the staff passes through the slip casting hole and pours into the thick liquid into to the inside of seepage point into, and during the thick liquid flowed into the structural layer via the slip casting hole, along with the injection of follow-up thick liquid, the thick liquid was packed the space of seepage point department to stop up the water of leaking from seepage point department, and accomplish the restoration to the structural layer.

Optionally, after drilling and before installing the grouting nozzle, the leakage point is flushed.

Through adopting above-mentioned technical scheme for the surface in slip casting hole is smooth, reduces the piece and to the blockking of slip casting work, and the thick liquid of being convenient for is filled up the seepage point.

Optionally, the drilling is completed and before flushing, a scabbling is performed on the structural layer.

Through adopting above-mentioned technical scheme, let the inside leakage point of structural layer of leakage point department more penetrating, make things convenient for the thick liquid to fill up leakage point department.

Optionally, after the flushing is finished and before the grouting nozzle is installed, epoxy polymer cement mortar is smeared on the roughened structural layer.

By adopting the technical scheme, the epoxy polymer cement mortar is smeared on the roughened structure layer, the surface of the structure layer is repaired, and cracks generated by roughening the surface of the structure layer are eliminated.

Optionally, during drilling, an exhaust hole is drilled in the structural layer, and the depth of the exhaust hole is lower than that of the grouting hole.

Through adopting above-mentioned technical scheme, the exhaust hole mainly used discharges the inside air of leak hunting point, and when the thick liquid was filled in leak hunting point department, the thick liquid extruded the inside air of leak hunting point, discharged via the exhaust hole.

Optionally, during drilling, auxiliary holes are drilled in the structural layer, and the depth of the auxiliary holes is lower than that of the grouting holes.

Through adopting above-mentioned technical scheme, the auxiliary hole is used for supplementary slip casting, uses with the slip casting hole cooperation, because the hole bottom in auxiliary hole is generally higher than the hole bottom in slip casting hole for the thick liquid via slip casting hole injection leakage point fills the structural layer inboard, and extends to the structural layer outside, and the auxiliary hole mainly fills the outside of structural layer, can use the auxiliary hole to carry out the slip casting under the circumstances that the outside is not filled enough when the slip casting hole slip casting.

Optionally, the exhaust holes, the auxiliary holes and the grouting holes are arranged in a triangular shape.

Through adopting above-mentioned technical scheme, the three is triangle-shaped and arranges for the three distance is the same, makes things convenient for the discharge of air and the cooperation of auxiliary hole and slip casting hole to use.

Optionally, the acrylic resin grouting liquid is a TJ-AC/SR acrylate resin grouting material;

the epoxy resin modified slurry is prepared by mixing epoxy resin and an epoxy resin curing agent according to the weight ratio of 5: 3 is prepared by stirring and mixing at normal temperature and normal pressure.

By adopting the technical scheme, the slurry is convenient for workers to select or configure.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the leakage point is directly filled with slurry by drilling and grouting at the leakage point, and the leakage point is blocked, so that water in soil is prevented from leaking from the leakage point of the structural layer;

2. the slurry can fill the leakage point conveniently by chiseling;

3. through setting up exhaust hole and auxiliary hole, make things convenient for the thick liquid to finish filling whole leakage point.

Drawings

FIG. 1 is a schematic step diagram of a construction method for treating a main structure defect of a subway in this embodiment;

FIG. 2 is a schematic view of a structure layer with grouting holes in the embodiment;

fig. 3 is a schematic diagram of the arrangement of the grouting holes in the structural layer in this embodiment.

Description of reference numerals: 1. a structural layer; 2. grouting holes; 3. an auxiliary hole; 4. and (4) exhausting holes.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a deformation joint grouting and leakage stoppage subway structure water leakage treatment method. Referring to fig. 1, the construction method for treating the diseases of the main structure of the subway comprises the following steps:

s1, determining a leakage point;

and (3) detecting the leakage points on the structural layer 1 by using an ultrasonic detector, detecting data such as the positions, the depths, the tortuosity and the like of the leakage points, and displaying the data such as the positions, the depths, the tortuosity and the like of the leakage points on a display screen of a computer so as to obtain the data of the leakage points.

S2, preparing slurry;

and preparing acrylic resin grouting liquid and epoxy resin modified grouting liquid.

The acrylic resin grouting liquid is TJ-AC/SR acrylate resin grouting material.

S3, drilling;

(1) directly drilling a grouting hole 2 at a leakage point, wherein the hole depth of the grouting hole 2 is greater than 2/3 of the thickness of the structural layer 1 and less than the whole thickness of the structural layer 1, and the hole diameter is 10-12mm, referring to fig. 2 and 3; the thickness of the structural layer 1 is 300mm-800 mm;

(2) drilling two holes at the outer edge of the 2-position grouting hole of the leakage point, wherein one hole is an auxiliary hole 3, the distance between the auxiliary hole 3 and the grouting hole 2 is 150mm, the hole depth is 150mm, and the hole diameter is 12 mm; the other hole is an exhaust hole 4, the distance between the exhaust hole 4 and the grouting hole 2 is also 150mm, the hole depth is 150mm, and the hole diameter is 12 mm. The auxiliary hole 3, the grouting hole 2 and the exhaust hole 4 are arranged in a triangular shape.

Wherein, auxiliary hole 3 is used for supplementary slip casting, uses with the cooperation of slip casting hole 2, because auxiliary hole 3's hole bottom is generally higher than the hole bottom of slip casting hole 2 for the thick liquid of pouring into the leakage point via slip casting hole 2 fills structural layer 1 inboard, and extends to the structural layer 1 outside, and auxiliary hole 3 mainly fills the outside of structural layer 1, can use auxiliary hole 3 to carry out the slip casting under the circumstances that the outside was not filled enough when slip casting hole 2 slip casting.

The air vent 4 is mainly used for discharging air inside the leakage point, and when the slurry is filled in the leakage point, the slurry extrudes the air inside the leakage point and is discharged through the air vent 4.

S4, chiseling;

roughening is performed on the structural layer 1, and the roughened area is within 200mm of the periphery of the grouting hole 2.

S5, washing;

the water gun is used for blowing and drying the chips left during drilling, and the smooth and level positions of the grouting hole 2, the exhaust hole 4 and the auxiliary hole 3 are kept. But also the chips on the structure layer 1 arising from the chiseling are washed clean.

S6, surface treatment;

the roughened structure layer 1 is coated with epoxy polymer cement mortar, the thickness is 3mm, the thickness is uniform, and no crack exists.

S7, installing a grouting nozzle;

and a grouting nozzle is arranged on the grouting hole 2, and the joint of the grouting nozzle and the grouting hole 2 is reinforced. During reinforcement, the grouting nozzle is sleeved with a rubber sleeve to reinforce the connection tightness between the grouting nozzle and the grouting hole 2.

S8, grouting:

1) injecting acrylic resin grouting liquid for water stopping, and then injecting epoxy resin modified grouting liquid for water stopping and reinforcing the leakage part;

2) when grouting is started in the first grouting hole 2, performing grouting pressure debugging, and determining stable pressure according to the conditions of cracks and underground water;

3) The grouting pressure is controlled to be 0.4-0.6MPa

4) The grouting amount can be 4 liters/minute;

5) according to the set grouting pressure, when grout circulates in the pipe, the hole is successfully grouted, and adjacent grouting holes 2 can be shifted to continue grouting;

6) and after grouting, cleaning redundant grouting material and equipment by using a cleaning agent.

In the grouting work:

(1) the grouting construction adopts a grouting pump to perform static grouting, a small quantity of multiple times of methods are adopted during grouting, whether grout overflows around is closely observed, if so, grouting is immediately stopped, and grouting is continued by replacing a far hole.

(2) Grouting adopts grouting pressure and grouting amount to carry out double control; the grouting amount per hole was estimated.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A deformation joint grouting and leaking stoppage subway structure water leakage treatment method is characterized by comprising the following steps:

s1, determining a leakage point;

s2, preparing slurry;

s3, drilling;

directly drilling grouting holes (2) at the leakage points, wherein the hole depth of each grouting hole (2) is greater than 2/3 of the thickness of the structural layer (1) and less than the whole thickness of the structural layer (1);

s4, installing a grouting nozzle;

a grouting nozzle is arranged on the grouting hole (2);

s5, grouting:

when the grout circulates in the pipe, the hole is successfully grouted, and the adjacent grouting hole (2) can be shifted to continue grouting.

2. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 1, characterized in that: and after the drilling is finished and before the grouting nozzle is installed, flushing the leakage points.

3. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 2, characterized in that: after drilling and before flushing, roughening is carried out on the structural layer (1).

4. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 3, characterized in that: and (3) after the flushing is finished and before the grouting nozzle is installed, smearing epoxy polymer cement mortar on the roughened structural layer (1).

5. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 1, characterized in that: and during drilling, drilling the exhaust hole (4) on the structural layer (1), wherein the depth of the exhaust hole (4) is lower than that of the grouting hole (2).

6. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 5, characterized in that: when drilling, auxiliary holes (3) are drilled in the structural layer (1), and the depth of the auxiliary holes (3) is lower than that of the grouting holes (2).

7. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 6, characterized in that: the exhaust holes (4), the auxiliary holes (3) and the grouting holes (2) are arranged in a triangular shape.

8. The deformation joint grouting and leaking stoppage subway structure water leakage treatment method according to claim 1, characterized in that: the acrylic resin grouting liquid is TJ-AC/SR acrylate resin grouting material;