CN-117661618-B - Treatment method for underground diaphragm wall joint leakage water

CN117661618BCN 117661618 BCN117661618 BCN 117661618BCN-117661618-B

Abstract

The invention provides a treatment method for leakage water of cracks of an underground diaphragm wall, which is characterized in that the cracks are repaired by a grouting device, wherein the grouting device comprises a stabilizing device and a grouting pipe, the stabilizing device comprises a grouting joint, a rotatable iron sheet group and a counter-force compression rod, the rotatable iron sheet group can be deformed in a suitable manner according to the bending form of the cracks to realize grouting requirements of different crack forms, the iron sheet group is arranged to facilitate the blocking of the special-shaped cracks, the counter-force action of a trapezoid boss is matched to ensure the sufficiency of grouting, and the grouting device can simultaneously block at multiple points to ensure the blocking of a leakage water channel inside the underground diaphragm wall.

Inventors

LEI ZHENYU
LIU JIANMEI
Lin Benhai
XU WENTIAN
Lin Zongtao
LUO WUZHANG
WANG YANHONG
LI MUYU

Assignees

广州地铁设计研究院股份有限公司

Dates

Publication Date: 20260508
Application Date: 20240103

Claims (5)

1. The utility model provides a processing method for underground diaphragm wall seam leakage water, repair the crack through the slip casting device, wherein the slip casting device includes stabilising arrangement and slip casting pipe, stabilising arrangement includes slip casting joint, rotatable iron sheet group and counter-force depression bar, the slip casting joint sets up in the slip casting downthehole of rotatable iron sheet group's tip, the counter-force depression bar passes through the screw thread form and connects on the slip casting joint, the iron sheet group comprises a plurality of removable installation's iron sheet, the centre of iron sheet is arch, both sides are the plane, sets up the quantity of iron sheet according to the length of crack during the installation, installs it in the dovetail groove of crack, and through counter-force depression bar setting up in dovetail groove outside, screw counter-force depression bar in slip casting crack department earlier, slip casting impact can produce outwards force when the slip casting, fixed with the integral component through counter-force depression bar and dovetail groove's cooperation, in addition, rotatable iron sheet group warp according to the crooked form of crack, wherein arch bottom in the middle of iron sheet is the slip casting chamber, connects through slip casting joint and slip casting pipe, the slip casting enters into the crack after pressurizing and fills the slip casting chamber, the pump outside the step of the pump, and is connected with the outside, characterized in that the pump is connected to the following: s1, firstly, processing the surface of a concrete crack, forming a trapezoid groove along the crack by using a manual or pneumatic pick, and then processing two sides of the crack cleanly, wherein the lower bottom of the trapezoid groove is one end close to the depth direction of the crack, the upper bottom of the trapezoid groove is the width far away from the depth direction of the crack, namely, the width of the lower bottom is ensured to be larger than that of the upper bottom, the grouting joint is connected with an iron sheet, and the distance between grouting pipes is set to be 1-1.5 m; S2, installing a stabilizing device along a crack route, wherein rotatable iron sheet groups are arranged according to different bending routes of cracks, and after the assembly is finished, installing a grouting joint at the end part of the iron sheet groups, wherein the upper part of the grouting joint is connected with a grouting pipe; s3, sealing slurry, sealing cracks by using quick-setting cement or cement-water glass slurry, and leveling by using cement mortar; S4, calculating the consumption of the slurry, grouting a crack after the material of the sealing slurry is solidified, and sealing a grouting cavity in the sealing slurry during grouting, wherein the pressure requirement of the grouting cavity is ensured by the inward shrinkage form of the trapezoid groove; S5, after grouting, the grouting opening is blocked by using quick-hardening cement, wherein after grouting, if the treatment effect is good, the grouting opening is blocked by using quick-hardening cement immediately, otherwise, the treatment is continued until the expected effect is achieved.
2. The method for treating water leakage at joints of underground diaphragm walls according to claim 1, wherein the trapezoid-shaped groove which is manually or by a pneumatic pick along the crack has an upper bottom width of 5cm, a lower bottom width of 10 cm and a depth of 10 cm.
3. The method for treating water leakage at joints of underground diaphragm walls according to claim 2, wherein when the cracks are cross cracks, the iron sheet group at least comprises a cross iron sheet piece, and arch-shaped bulges are arranged in four directions of the cross iron sheet piece, so that the iron sheets in the vertical direction can be conveniently connected.
4. The method for treating water leakage at joints of underground diaphragm walls according to claim 1, wherein the grouting pipe comprises a connecting pipe and a valve, the diameter of the connecting pipe is 1/2-1/4 inch, the length of the connecting pipe is 10-15 cm, one end of the connecting pipe is inserted into the grouting joint, and the other end of the connecting pipe is connected with the valve.
5. The method for treating water leakage at the joint of the underground diaphragm wall according to claim 1, wherein before sealing grouting, if the water leakage amount in the joint is large, water is required to be guided first, a deep hole is drilled to a water source by using a pick, a long pipe is buried, pumping is carried out by using a pump, so that the water level in the joint is reduced, and then sealing is carried out.

Description

Treatment method for underground diaphragm wall joint leakage water Technical Field The invention belongs to the technical field of construction of underground diaphragm walls, and particularly relates to a treatment method for water leakage of joints of an underground diaphragm wall. Background Because of the characteristics of good integrity and high rigidity of the underground diaphragm wall, the underground diaphragm wall is widely applied to deep and large foundation pits. However, due to the construction characteristics of the underground diaphragm wall, the joint between two adjacent groove sections is always the weakest place, and when water leakage occurs at the joint, the displacement of the underground diaphragm wall becomes large, so that the deformation of the whole foundation pit is influenced, and the consequences are serious. Therefore, in the foundation pit engineering construction process, when water leakage occurs at the joint, a quick and effective treatment method is adopted, so that the influence of the water leakage is reduced. Disclosure of Invention In order to solve the technical problems, the invention provides a method for treating water leakage of cracks of an underground diaphragm wall, which comprises repairing the cracks through a grouting device, wherein the grouting device comprises a stabilizing device and a grouting pipe, the stabilizing device comprises a grouting joint, a rotatable iron sheet group and a counter-force pressure rod, the grouting joint is arranged in a grouting hole at the end part of the rotatable iron sheet group, the counter-force pressure rod is connected to the grouting joint in a threaded mode, the iron sheet group consists of a plurality of detachably mounted iron sheets, the middle of each iron sheet is arched and is provided with two planes, the number of the iron sheets is set according to the length of the cracks during installation, the iron sheets are mounted in trapezoid grooves of the cracks, the counter-force pressure rod is arranged outside the trapezoid grooves, the counter-force pressure rod is screwed at the cracks before grouting, and grouting impact can generate outward force when grouting, the integral components can be well stabilized and fixed through the cooperation of the counter-force pressure rod and the trapezoid grooves: s1, firstly, processing the surface of a concrete crack, forming a trapezoid groove along the crack by using a manual or pneumatic pick, and then processing two sides of the crack cleanly, wherein the lower bottom of the trapezoid groove is one end close to the depth direction of the crack, and the upper bottom of the trapezoid groove is the width far away from the depth direction of the crack, namely the width of the lower bottom is ensured to be larger than the width of the upper bottom; S2, installing a stabilizing device along a crack route, wherein rotatable iron sheet groups are arranged according to different bending routes of cracks, and after the assembly is finished, installing a grouting joint at the end part of the iron sheet groups, wherein the upper part of the grouting joint is connected with a grouting pipe; s3, sealing slurry, sealing cracks by using quick-setting cement or cement-water glass slurry, and leveling by using cement mortar; S4, calculating the consumption of the slurry, grouting a crack after the material of the sealing slurry is solidified, and sealing a grouting cavity in the sealing slurry during grouting, wherein the pressure requirement of the grouting cavity is ensured by the inward shrinkage form of the trapezoid groove; S5, after grouting, the grouting opening is blocked by using quick hardening cement. The trapezoid groove which is chiseled by the manual or pneumatic pick along the crack has the upper bottom width of 5cm, the lower bottom width of 10 cm and the depth of 10 cm. When the crack is a cross crack, the iron sheet group at least comprises a cross iron sheet piece, and the four directions of the cross iron sheet piece are all provided with arch-shaped bulges, so that the iron sheets in the vertical direction can be conveniently connected. The grouting joint and the iron sheet can be connected at two ends or one end, and the distance between grouting pipes is 1-1.5 m. The grouting pipe comprises a connecting pipe and a valve, wherein the diameter of the connecting pipe is 1/2-1/4 inch, the length of the connecting pipe is 10-15 cm, one end of the connecting pipe is inserted into the grouting joint, and the other end of the connecting pipe is connected with the valve. Before the closed grouting, if the water leakage amount in the seam is large, water is required to be firstly guided, namely, a deep hole is drilled to a water source by using a pick, a long pipe is buried, pumping water is carried out by using a pump, so that the water level in the seam is reduced, and then the seam is closed. The sealing grouting should pay attention to the combination of new and