CN112195938A

CN112195938A - Treatment method for water seepage of occlusive pile

Info

Publication number: CN112195938A
Application number: CN202010923015.0A
Authority: CN
Inventors: 李飞; 张金亮; 张飞; 焦国强
Original assignee: Beijing MTR Construction Administration Corp
Current assignee: Beijing MTR Construction Administration Corp
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-01-08

Abstract

The invention provides a method for treating water seepage of an occlusive pile, and relates to the technical field of underground construction engineering. The method for treating the water seepage of the occlusive pile comprises the following steps: s1, forming a plurality of grouting holes in an occlusive pile element pile on the outer side of a vertical shaft well wall, wherein the grouting holes penetrate through the occlusive pile element pile to reach a foundation at the outer end; s2, inserting a grouting pipe into the inner end of the prepared grouting hole; s3, grouting outside the vertical shaft through a grouting pipe by using a grouting machine; and S4, arranging pressure-reducing and dewatering wells on the foundation outside the vertical shaft awning, wherein the arranging quantity of the pressure-reducing and dewatering wells in each direction is determined according to the water inrush degree in the well and the site construction conditions. When the method is used for construction, special equipment is not needed, the construction method is simple, the problem of water seepage of the vertical shaft secant pile can be effectively solved, the waterless operation of the vertical shaft is ensured, and meanwhile, the method has a reinforcing effect on the enclosure structure.

Description

Treatment method for water seepage of occlusive pile

Technical Field

The invention relates to the technical field of underground construction engineering, in particular to a method for treating water seepage of an occlusive pile.

Background

The secant pile is often used as a containment and water stop structure for shaft excavation. When the secant pile has defects or the secant pile is not tightly meshed due to insufficient vertical precision, underground water contained in the stratum flows out of the shaft along the water seepage channel on the pile body to influence the construction operation of the shaft, so that a treatment method needs to be invented to solve the water seepage problem of the secant pile.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a method for treating water seepage of an occlusive pile, which solves the problem of water seepage of a pile body of the existing vertical shaft caused by the defects of the occlusive pile or the untight occlusion.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a method for treating seepage of a secant pile comprises the following steps:

s1, forming a plurality of grouting holes in an occlusive pile element pile on the outer side of a vertical shaft well wall, wherein the grouting holes penetrate through the occlusive pile element pile to reach a foundation at the outer end;

s2, inserting a grouting pipe into the inner end of the prepared grouting hole;

s3, grouting outside the vertical shaft through a grouting pipe by using a grouting machine;

and S4, arranging pressure-reducing and dewatering wells on the foundation outside the vertical shaft awning, wherein the arranging quantity of the pressure-reducing and dewatering wells in each direction is determined according to the water inrush degree in the well and the site construction conditions.

Preferably, the grouting pipe is a welded steel pipe of phi 40, and the grouting pipe is arranged on the plain pile perpendicular to the well wall.

Preferably, the transverse distance between two adjacent hole sites of the grouting holes is 500-600mm, the vertical distance is 500mm, and the hole depth is 2 m.

Preferably, the grouting material in the grouting process is cement-water glass double-liquid slurry.

Preferably, the plane scope of slip casting is around the shaft, from the outside 2 m's of interlock stake outline scope, and vertical range does not have fixed size, guarantees to cover all infiltration points of the wall of a well.

(III) advantageous effects

The invention provides a method for treating water seepage of an occlusive pile. The method has the following beneficial effects:

the invention provides a method for treating water seepage of an occlusive pile, which is simple in construction method and can effectively solve the problem of water seepage of the occlusive pile of a vertical shaft, ensure the waterless operation of the vertical shaft and simultaneously have the function of reinforcing a building enclosure.

Drawings

FIG. 1 is a schematic plan view of the grouting range of the present invention;

FIG. 2 is a schematic cross-sectional view of a grouting range according to the present invention;

FIG. 3 is a schematic view of the grouting hole arrangement of the present invention;

FIG. 4 is a schematic plan view of the pressure-reducing dewatering well according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1 to 4, an embodiment of the present invention provides a method for treating water seepage of a bite pile, including the following steps:

s1, arranging a plurality of grouting holes on an occlusive pile element pile on the outer side of a vertical shaft well wall, wherein the grouting holes penetrate through the occlusive pile element pile to reach a foundation at the outer end, and the transverse distance between two adjacent hole sites of the grouting holes is 500-600mm, the vertical distance is 500mm, and the hole depth is 2m, as shown in FIG. 3;

s2, inserting a grouting pipe into the inner end of the arranged grouting hole, wherein the grouting pipe is a welded steel pipe with the diameter of phi 40, and the grouting pipe is arranged on the plain pile in a manner of being vertical to the well wall;

s3, grouting outside the vertical shaft through a grouting pipe by using a grouting machine, wherein the grouting material is cement-water glass double-liquid slurry, the grouting plane range is the range of 2m outward from the outer contour line of the occlusive pile around the vertical shaft, and the vertical range has no fixed size, so that all water seepage points of the shaft wall are covered, as shown in the figures 1 and 2;

s4, arranging pressure-reducing and dewatering wells on the foundation outside the shaft awning, wherein the arranging quantity of the pressure-reducing and dewatering wells in each direction is determined according to the water gushing degree in the well and the site construction conditions, the pressure-reducing and dewatering wells can reduce the water pressure in the foundation near the shaft, and the condition of water flow permeation in the foundation near the shaft is prevented, as shown in figure 4.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A method for treating water seepage of an occlusive pile is characterized by comprising the following steps: the method comprises the following steps:

s2, inserting a grouting pipe into the inner end of the prepared grouting hole;

2. The method for treating the seepage of the occlusive pile according to claim 1, wherein the method comprises the following steps: the grouting pipe is a welded steel pipe of phi 40, and the grouting pipe is arranged on the plain pile perpendicular to the well wall.

3. The method for treating the seepage of the occlusive pile according to claim 1, wherein the method comprises the following steps: the transverse distance between two adjacent hole sites of the grouting holes is 500-600mm, the vertical distance is 500mm, and the hole depth is 2 m.

4. The method for treating the seepage of the occlusive pile according to claim 1, wherein the method comprises the following steps: the grouting material in the grouting process is cement-water glass double-liquid slurry.

5. The method for treating the seepage of the occlusive pile according to claim 1, wherein the method comprises the following steps: the plane scope of slip casting is around the shaft, from the outside 2 m's of interlock stake outline scope, and vertical scope does not have fixed size, guarantees to cover all infiltration points of the wall of a well.