Anti-seepage wall assembly and construction method of anti-seepage wall assembly

Abstract

The invention discloses an anti-seepage wall assembly and a construction method of the anti-seepage wall assembly, and the anti-seepage wall assembly comprises two foundations which are arranged at an interval along a first direction; the number of the guide walls is two, the two guide walls are arranged at intervals, the two guide walls are located between the two foundations, and the guide walls are connected with the foundations on the same side; the connector is arranged between the two guide walls, grooves are formed in the two end faces, facing the guide walls in the first direction, of the connector, waterstop strips are arranged in the grooves, the waterstop strips abut against the guide walls on the same side, the waterstop strips are water swelling pieces, the area, except the connector, between the two guide walls is filled with concrete, and the first direction is perpendicular to the vertical direction. According to the anti-seepage wall assembly, seepage paths along the interfaces of the guide walls and the connectors and between the two guide walls are effectively cut off, and the guide walls and the connectors are connected into an integral stress body through concrete, so that the anti-seepage wall assembly obtains stable anti-seepage and force transmission performance at the joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diaphragm wall, in particular to a diaphragm wall assembly and a construction method of the diaphragm wall assembly. BACKGROUND

[0002] In the diaphragm wall engineering, the joint technology is the core link to guarantee the overall anti-seepage performance and structural integrity of the wall. However, the traditional joint mainly depends on a single water stop material (such as a rubber water stop belt) to realize sealing, lacks a rigid bearing component, and is prone to sealing failure due to structural deformation under the action of high water head, and cannot simultaneously meet the dual requirements of anti-seepage grade and shear strength. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a diaphragm wall assembly, which cuts off the seepage path along the interface of the guide wall and the joint and between the two guide walls, and the concrete connects the guide wall and the joint into a whole force body, so that the diaphragm wall assembly simultaneously obtains stable anti-seepage and force transmission performance at the joint.

[0004] The present application also provides a construction method of the diaphragm wall assembly, which applies the above-mentioned diaphragm wall assembly.

[0005] The diaphragm wall assembly according to the embodiment of the present application comprises: two foundations, which are arranged at intervals along a first direction; two guide walls, which are arranged at intervals and located between the two foundations, and connected with the foundations on the same side; and a joint, which is arranged between the two guide walls, has a groove on the two end faces of the guide wall along the first direction, and is provided with a water stop strip in the groove, the water stop strip is in abutment with the guide wall on the same side, the water stop strip is a water-swelling member, and the region between the two guide walls except the joint is filled with concrete, and the first direction is perpendicular to the up-down direction.

[0006] The diaphragm wall assembly according to the embodiment of the present application has the groove on the two end faces of the guide wall along the first direction through the joint, the water stop strip is arranged in the groove, the water stop strip is in abutment with the guide wall on the same side, the water stop strip is a water-swelling member, and the region between the two guide walls except the joint is filled with concrete, so as to cut off the seepage path along the interface of the guide wall and the joint and between the two guide walls, and the concrete connects the guide wall and the joint into a whole force body, so that the diaphragm wall assembly simultaneously obtains stable anti-seepage and force transmission performance at the joint.

[0007] In some embodiments of the present application, the joint comprises a main body section extending along the first direction, a first section and a second section, the first section and the second section are located at two ends of the main body section in length direction and connected with the main body section, and the first section and the second section have the groove at one end away from the other one.

[0008] In some embodiments of the present application, the first section has a first extension section extending towards the second section at two ends in a second direction, and / or the second section has a second extension section extending towards the first section at two ends in the second direction, the first direction, the second direction and the up-down direction are perpendicular to each other.

[0009] In some embodiments of the present application, the joint further comprises a third section, the third section is located between the first section and the second section along the first direction, and the third section has two ends close to each other and connected with the main body section.

[0010] In some embodiments of the present application, the third section comprises a first sub-section, one end of the first sub-section in length direction is connected with the main body section, and a second sub-section, a middle region of the second sub-section is connected with one end of the first sub-section away from the main body section.

[0011] In some embodiments of the present application, the waterstop uses EPDM rubber base material mixed with 10%-12% nanometer montmorillonite.

[0012] In some embodiments of the present application, in any cross section perpendicular to the up-down direction, the cross section of the groove gradually decreases along the direction from the guide wall to the joint, and / or the groove extends along the up-down direction.

[0013] In some embodiments of the present application, the guide wall has a pre-embedded part, part of the pre-embedded part extends into two guide walls for positioning the joint.

[0014] In some embodiments of the present application, the joint has a plurality of grooves at two end faces of the joint along the first direction towards the guide wall, and the plurality of grooves on the same side are arranged in the second direction.

[0015] The construction method of the diaphragm wall assembly according to the embodiments of the present application, the diaphragm wall assembly comprises the diaphragm wall assembly described above, and the construction method comprises: arranging the waterstop in the groove, covering the outer surface of the joint except the two end faces of the joint in the first direction by the anti-fouling film; placing the joint between two guide walls by hoisting tools to make the waterstop abut with the guide wall on the same side; peeling off all the anti-fouling film on the outer surface of the joint, and pouring concrete between the two guide walls.

[0016] According to the construction method of the diaphragm wall assembly, the anti-pollution film is used as temporary isolation protection in the construction stage to avoid the joint surface from being polluted by mud and the like, and after the removal, the concrete can be directly combined with the clean joint surface, so that the bonding strength of the joint and the concrete is improved, and the structural integrity and durability are ensured. Meanwhile, the joint has a groove on the two end surfaces thereof facing the guide walls in the first direction, a water stop strip is arranged in the groove, the water stop strip abuts against the guide wall on the same side, the water stop strip is a water-swelling member, and the area between the two guide walls is filled with concrete except the joint, so that the seepage path along the interface between the guide walls and the joint and between the two guide walls is cut off, and the concrete connects the guide walls and the joint into a whole stress body, so that the diaphragm wall assembly simultaneously obtains stable anti-seepage and force transmission performance at the joint.

[0017] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, in which:

[0019] Figure 1 is a horizontal sectional view of a diaphragm wall assembly according to an embodiment of the present application.

[0020] REFERENCE NUMERALS

[0021] 100, diaphragm wall assembly;

[0022] 1, foundation;

[0023] 2, guide wall;

[0024] 3, joint; 31, main body section; 32, first section; 321, first extension section; 322, groove; 33, second section; 331, second extension section; 34, third section; 341, first sub-section; 342, second sub-section; 35, water stop strip. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below with reference to the attached drawings, in which examples of the embodiments are shown, wherein the same or similar reference numerals are used throughout to represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The following description, with reference to the accompanying drawings, describes a seepage barrier assembly 100 according to an embodiment of the present invention.

[0029] like Figure 1 As shown, the seepage barrier assembly 100 according to an embodiment of the present invention includes a foundation 1, a guide wall 2, and a joint 3.

[0030] The foundation 1 consists of two foundations, which are spaced apart along the first direction. The guide wall 2 consists of two guide walls, which are spaced apart and located between the two foundations 1. The guide wall 2 is connected to the foundation 1 on the same side. The joint 3 is located between the two guide walls 2. The two ends of the joint 3 facing the guide wall 2 along the first direction have grooves 322. Water-stop strips 35 are provided in the grooves 322. The water-stop strips 35 abut against the guide wall 2 on the same side. The water-stop strips 35 are water-expanding components. The area between the two guide walls 2, except for the joint 3, is filled with concrete. The first direction and the vertical direction are perpendicular.

[0031] Thus, the foundation 1 provides vertical bearing capacity and horizontal reaction force for the guide wall 2 and the joint 3, keeping the guide wall 2 stable in the first direction, the wall boundary between the two guide walls 2 and the joint 3 providing lateral constraint, and together with the concrete filled between the two guide walls 2, they constitute the wall part of the seepage prevention wall.

[0032] Meanwhile, the joint 3 is located between the two guide walls 2 and serves as a bearing and limiting component of the joint part of the wall body. The joint 3 is provided with a groove 322 on the end surface, which limits the position of the water stop strip 35, so that the water stop strip 35 is in contact with the guide wall 2 on the same side in the groove 322. In the dry state of the water stop strip 35, the water stop strip 35 realizes the pre-pressing sealing. When the water stop strip 35 is wet, the water stop strip 35 expands along the guide wall 2 and continuously presses the guide wall 2 and the inner wall of the groove 322, actively fills the joint gap, and thus cuts off the seepage path along the interface between the guide wall 2 and the joint 3 and between the two guide walls 2. The concrete connects the guide wall 2 and the joint 3 into a whole stress body, so that the anti-seepage wall assembly 100 simultaneously obtains stable anti-seepage and force transmission performance at the joint.

[0033] Further, the joint 3 is a steel piece, which improves the overall structural strength of the joint 3. Specifically, the joint 3 is made of Q355 low-alloy high-strength steel (yield strength ≥ 355 MPa). Further, the outer surface of the joint 3 is subjected to corrosion protection treatment (epoxy coating thickness ≥ 300 μm).

[0034] Specifically, in the construction process of the anti-seepage wall assembly 100, a mounting groove is formed in the space between the two guide walls 2 by hydraulic milling. The milling wheel speed is controlled at 28-32 r / min, and the verticality of the groove wall is controlled in real time by a laser inclinometer system. The verticality deviation can be controlled to be ≤1 / 500. The groove cleaning process can be carried out by air-lift reverse circulation method (vacuum degree ≥ 0.06 MPa), so as to ensure that the thickness of the sediment at the bottom of the groove is ≤30 mm. Further, the mounting groove between the two guide walls 2 is preferably reserved according to the outer dimensions of the joint 3 when the groove is formed. The depth of the mounting groove is preferably increased by about 50 mm than the height of the joint 3, so that the lower part of the joint 3 is leveled and supported, and the positioning is adjusted, so as to ensure the subsequent contact quality with the guide wall 2 and the concrete.

[0035] According to the anti-seepage wall assembly 100 of the embodiment of the present application, the joint 3 is provided with a groove 322 on the two end surfaces facing the guide walls 2 in the first direction. The groove 322 is provided with a water stop strip 35. The water stop strip 35 is in contact with the guide wall 2 on the same side. The water stop strip 35 is a water-expanding piece. The area between the two guide walls 2 is filled with concrete except the joint 3, so as to cut off the seepage path along the interface between the guide wall 2 and the joint 3 and between the two guide walls 2. The concrete connects the guide wall 2 and the joint 3 into a whole stress body, so that the anti-seepage wall assembly 100 simultaneously obtains stable anti-seepage and force transmission performance at the joint.

[0036] In some embodiments of the present application, as shown in Figure 1 The joint 3 includes a main body segment 31, a first segment 32 and a second segment 33. The main body segment 31 extends in the first direction. The first segment 32 and the second segment 33 are respectively located at the two ends of the main body segment 31 in the length direction and are connected with the main body segment 31. The end of the first segment 32 away from the second segment 33 and the end of the second segment 33 away from the first segment 32 are provided with a groove 322.

[0037] Thus, the main body section 31 forms a load-bearing and positioning main framework at the joint between the two guide walls 2, and the first section 32 and the second section 33 provide positioning and support for the end of the water stop 35 towards the two side guide walls 2 respectively, so that the water stop 35 is in corresponding abutment with the same side guide wall 2 at both ends, forming a double-end symmetric sealing and force transmission path in the first direction, thereby improving the overall sealing continuity and stress stability of the joint and the cutoff wall body.

[0038] Further, the thickness of the main body section 31 is 12-16 mm, and the main body section 31 is provided with a plurality of water-permeable holes with a diameter of 10-15 mm (the direct distance between any adjacent water-permeable holes is 150-200 mm), facilitating air exhaust and wrapping during concrete pouring. At least one of the first section 32 and the second section 33 is provided with a wedge-shaped tooth groove (slope 1:8) on both sides in the second direction, enhancing mechanical engagement with the impermeable concrete. The width of the first section 32 and the second section 33 with the wedge-shaped tooth groove is 100-120 mm.

[0039] In some embodiments of the present application, as shown in Figure 1 the first section 32 has a first extension section 321 extending towards the second section 33 at both ends in the second direction. Thus, the structural overlap and effective length of the joint 3 in this direction are increased by the first extension section 321, so that the sealing and force transmission path formed in the first direction is more fully constrained and positioned in the second direction, which is beneficial to dispersing the shear force and bending moment at the joint, suppressing local corner deformation, and further lengthening the potential seepage path when the water stop 35 and the concrete are matched between the two guide walls 2, thereby improving the overall sealing continuity and stress stability of the joint area.

[0040] In some embodiments of the present application, as shown in Figure 1 the second section 33 has a second extension section 331 extending towards the first section 32 at both ends in the second direction, and the first direction, the second direction and the up-down direction are perpendicular to each other. Thus, the structural overlap and effective length of the joint 3 in this direction are increased by the second extension section 331, so that the sealing and force transmission path formed in the first direction is more fully constrained and positioned in the second direction, which is beneficial to dispersing the shear force and bending moment at the joint, suppressing local corner deformation, and further lengthening the potential seepage path when the water stop 35 and the concrete are matched between the two guide walls 2, thereby improving the overall sealing continuity and stress stability of the joint area.

[0041] In some embodiments of the present application, as shown in Figure 1 the joint 3 further includes a third section 34. In the first direction, the third section 34 is located between the first section 32 and the second section 33, and the two third sections 34 are close to each other and connected to the main body section 31 at one end respectively.

[0042] Thus, the two third segments 34 segmentally reinforce the main segment 31 in the first direction and form a multi-point connection, making the force flow transmission between the main segment 31 and the first segment 32 and the second segment 33 more smooth, and being able to provide multi-path stress and redundant bearing at the joint, thereby reducing the risk of stress concentration in a single cross section. At the same time, the third segment 34 geometrically reinforces and limits the space stiffness of the joint 3, which helps to maintain the stability of the position and posture of the joint 3 between the two guide walls 2, and provides a more stable boundary condition for the fitting and sealing of the water stop strip 35 in the end groove 322, thereby improving the overall sealing and structural reliability of the joint area.

[0043] In some embodiments of the present application, as shown in Figure 1 The third segment 34 includes a first sub-segment 341 and a second sub-segment 342. One end of the first sub-segment 341 in the length direction is connected with the main segment 31, and the middle region of the second sub-segment 342 is connected with the end of the first sub-segment 341 away from the main segment 31. Thus, the bending, shearing and torsional synergistic capabilities of the third segment 34 are improved, and a longer and more tortuous potential seepage channel is formed in the joint area, which is conducive to cooperating with the sealing effect of the water stop strip 35 in the end groove 322, and further enhances the sealing continuity and overall stability of the joint 3.

[0044] In some embodiments of the present application, the water stop strip 35 is made of ethylene-propylene-diene rubber base material mixed with 10%-12% nanometer montmorillonite. Thus, by such a setting, the water stop strip 35 expands when it comes into contact with water, so that the water stop strip 35 fits with the groove 322 in a dry state to form a pre-pressing seal, and when subjected to water, the water stop strip 35 expands in volume along the direction of the groove 322 and continuously applies a normal pressure to the inner wall of the guide wall 2 and the groove 322, actively filling the joint micro gap and compensating for the slight displacement during construction and service, thereby forming a stable and continuous sealing band between the two guide walls 2, and improving the anti-seepage reliability and durability of the joint.

[0045] In some embodiments of the present application, as shown in Figure 1 In any cross section perpendicular to the up-down direction, the cross section of the groove 322 gradually decreases in the direction from the guide wall 2 to the joint 3. Thus, by such a setting, it is conducive to effectively converting the expansion force into a normal sealing pressure on the guide wall 2 and the wall of the groove 322 when the water stop strip 35 expands, thereby improving the sealing stability of the joint.

[0046] Further, in any cross section perpendicular to the up-down direction, the groove 322 is semicircular or trapezoidal. It can be understood that the semicircular shape helps to homogenize the contact stress, reduce stress concentration at sharp corners, and guide the expansion of the water stop strip 35 in all directions; the trapezoidal shape helps to form directional limiting and additional wedge tightening effect, and enhances the fitting and sealing between the water stop strip 35 and the wall of the groove 322 and the guide wall 2, thereby improving the anti-disturbance and anti-seepage capabilities.

[0047] In some embodiments of the present application, the groove 322 extends in the up-down direction. In this way, the groove 322 forms a through sealing band in the up-down direction, thereby improving the overall sealing continuity and durability of the joint area.

[0048] In some embodiments of the present application, as shown in Figure 1 In some embodiments of the present application, as shown in

[0049] In some embodiments of the present application, the guide wall 2 has a pre-embedded part, part of which extends into the two guide walls 2, for positioning the joint 3. In this way, the joint 3 is referenced and positioned accurately in the first direction, the second direction and the up-down direction through the pre-embedded part, ensuring that the relative position and attitude of the joint 3 and the two side guide walls 2 are stable, so that the water stop 35 placed in the groove 322 of the joint 3 can be uniformly and stably attached to the same side guide wall 2, avoiding uneven pre-pressing and local leakage caused by mispositioning or tilting of the joint 3, while leaving a controlled distance for the filling of concrete between the two guide walls 2, so that the joint 3, the guide wall 2 and the concrete form an overall force system and improve the sealing and load-bearing reliability of the joint.

[0050] Specifically, the positioning between the joint 3 and the guide wall 2 is preferably achieved by a three-dimensional constraint (deviation ≤2mm) through the pre-embedded part in the guide wall 2, and the planar position deviation of the joint 3 after installation is not more than 3mm, and the perpendicularity deviation is preferably not more than 1 / 1000; the bottom of the joint 3 is preferably leveled and supported by C40 early strength concrete, and the 24h compressive strength thereof is preferably not less than 20MPa, and temporary fixation is performed between the top of the joint 3 and the guide wall 2 to form a rigid installation reference.

[0051] In some embodiments of the present application, as shown in Figure 1 In some embodiments of the present application, as shown in

[0052] In some embodiments of the present invention, the inner net width of the guide wall 2 is preferably 150-200mm larger than the wall thickness, so as to leave a stable working position and lateral constraint space between the two guide walls 2 for the installation of the joint 3, the embedding of the waterstop strip 35 and the pouring of concrete, thereby improving the construction convenience and positioning accuracy of the joint area.

[0053] In some embodiments of the present invention, the cross-section of the waterstop strip 35 is T-shaped, with a transverse width of 60mm to 80mm and a vertical height of 40mm to 50mm. When the waterstop strip 35 is embedded in the groove 322, it preferably maintains an initial compression of 15% to 20% to form a stable pre-compression seal in a dry state. The waterstop strip 35 is preferably dried at 60°C for approximately 2 hours before installation. During installation, it is pressed into the groove 322 at a uniform speed of 0.5m / min to 1m / min. The ends of adjacent waterstop strip 35 segments are preferably vulcanized at 160±5°C and 0.3MPa to form a continuous sealing ring.

[0054] In some embodiments of the present invention, the concrete is preferably C25 self-compacting waterproof concrete, with a spread of preferably 750±50mm and a V-shaped funnel outflow time of preferably 8-12s; during pouring, it is preferred to use a guide pipe with a diameter of about 300mm for layered pouring, with the guide pipe burial depth preferably maintained in the range of 3-8m, the overall rising speed preferably controlled at 4-6m / h, and the initial burial depth preferably not less than 2.5m; during the pouring process, the filling state of the concrete can be observed through the through hole in the web of joint 3 to avoid voids and ensure the bonding effect.

[0055] In some embodiments of the present invention, the antifouling membrane is preferably peeled off approximately 30 minutes before concrete pouring, using a pre-set traction rope to peel off the membrane entirely from top to bottom. If local contamination is found on the outer surface of the joint 3, it can be quickly rinsed with high-pressure water at 0.3–0.5 MPa. After peeling, the outer surface of the joint 3 preferably has no membrane residue, or the residual area is no more than 5 cm². 2 / m 2 This is to ensure the quality of direct bonding between the concrete and joint 3.

[0056] The following describes the construction method of the anti-seepage wall assembly 100 according to an embodiment of the present invention.

[0057] According to an embodiment of the present invention, a construction method for a cutoff wall assembly 100 is provided. The cutoff wall assembly 100 includes the aforementioned cutoff wall assembly 100, and the construction method includes:

[0058] A waterstop strip 35 is placed inside the groove 322, and the outer surface of the joint 3, excluding the two opposing ends of the joint 3 along the first direction, is covered by an anti-fouling membrane. Thus, a stable pre-pressure seal is formed in the groove 322 by the waterstop strip 35, and the anti-fouling membrane isolates the slurry and impurities from the groove, keeping the outer surface of the joint 3 clean.

[0059] Using a hoisting tool, the joint 3 is placed between the two guide walls 2 so that the waterstop strip 35 abuts against the guide wall 2 on the same side. This hoisting and positioning ensures that the waterstop strip 35 is reliably fitted to the guide wall 2, establishing an initial sealing interface at the joint and providing a confined boundary for subsequent water expansion.

[0060] After peeling off all the antifouling membrane from the outer surface of joint 3, concrete is poured between the two guide walls 2. This immediate concrete pouring after peeling off the antifouling membrane allows the concrete to bond directly to the clean outer surface of joint 3 and form a unified load-bearing structure with the guide walls 2, thus simultaneously achieving continuous seepage prevention and a stable load-bearing path at the joint. Specifically, no membrane residue remains on the surface of joint 3 (residual area ≤ 5 cm²). 2 / m 2 If local contamination is found, use a high-pressure water gun (pressure 0.3MPa-0.5MPa) for rapid rinsing. Meanwhile, the anti-fouling membrane serves as temporary isolation and protection during construction, preventing contamination of the joint 3 surface by mud, etc. After removal, the concrete can directly bond to the clean joint 3 surface, increasing the bond strength between the joint 3 and the concrete by more than 30%, ensuring the structural integrity and durability.

[0061] After peeling off all the antifouling membranes from the outer surface of joint 3, immediately pour C25 self-compacting waterproof concrete (expansion 750±50mm, V-shaped funnel outflow time 8-12s) through a 300mm diameter pouring pipe (500mm from the bottom of the trench) in layers. The first batch of concrete should be buried in the pipe to a depth of ≥2.5m. During the pouring process, monitor the concrete filling through the permeable holes of joint 3. The overall rising speed should be controlled at 4-6m / h, and the burial depth of the pipe should always be maintained at 3-8m to ensure that the concrete and joint 3 are tightly bonded and form an integral load-bearing system.

[0062] According to the construction method of the anti-seepage wall assembly 100 of the present invention, the antifouling membrane is used as a temporary isolation and protection during the construction stage to prevent the surface of the joint 3 from being contaminated by mud and other substances. After removal, the concrete can directly bond with the clean surface of the joint 3, which can improve the bonding strength between the joint 3 and the concrete and ensure the integrity and durability of the structure. At the same time, the joint 3 has grooves 322 on both ends of the guide wall 2 along the first direction. Water-stop strips 35 are provided in the grooves 322 and abut against the guide wall 2 on the same side. The water-stop strips 35 are water-swellable components. The area between the two guide walls 2, except for the joint 3, is filled with concrete, thereby cutting off the seepage path along the interface between the guide wall 2 and the joint 3 and between the two guide walls 2. The concrete connects the guide wall 2 and the joint 3 into a whole load-bearing body, so that the anti-seepage wall assembly 100 can simultaneously obtain stable anti-seepage and force transmission performance at the joint.

[0063] In some embodiments of the present invention, the antifouling membrane is preferably an HDPE membrane with a thickness of 1.0 mm to 1.5 mm, and the surface of the membrane is coated with a silicone-based release agent to completely isolate the outer surface of the joint 3 from mud and impurities during the construction stage. The edge of the antifouling membrane preferably extends about 150 mm beyond the outer surface of the joint 3 and is temporarily fixed with biodegradable tape. The adhesive strength of the tape is preferably no greater than 0.5 N / cm to facilitate subsequent overall peeling without residue.

[0064] In some embodiments of the present invention, after temporary isolation during construction using an antifouling membrane, the concrete can be directly bonded to the clean outer surface of the joint 3, and the bond strength between the joint 3 and the concrete can be increased by more than 30%. Under the condition of meeting quality control, the allowable thickness of sediment at the bottom of the tank can be relaxed to no more than 50 mm, the construction rework rate can be reduced to less than 1%, and the construction efficiency of a single tank section can be increased by about 20% to 30%.

[0065] The antifouling membrane also reduces the possibility of contamination of the waterstop strip 35. Combined with the 250%-350% expansion rate of the waterstop strip 35, the permeability coefficient at the joint can be controlled to no more than 5×10⁻⁶. -9 The shear strength of the joint 3 area can reach or exceed 1.8 MPa, forming a "rigid-flexible" synergistic stress system with the concrete and waterstop 35. It can adapt to ground settlement within 3‰, and the deformation tolerance is increased by 60% compared with the I-beam joint 3. It can also adapt to uneven settlement of no more than 3‰. In terms of durability, the weathering life of the epoxy protective layer on the outer surface of the joint 3 is preferably no less than 30 years, and the expansion stability of the waterstop 35 in an environment with pH 2 to 13 is preferably maintained for no less than 25 years, thereby significantly improving the long-term stability and economy of the anti-seepage wall assembly 100 in complex hydraulic environments.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A seepage-proof wall assembly, characterized in that, include: The foundation comprises two foundations, which are spaced apart along a first direction. Guide walls, wherein two guide walls are spaced apart and located between two foundations, and the guide walls are connected to the foundations on the same side; The connector is located between the two guide walls. The connector has grooves on both ends of the guide wall along the first direction. A water-stop strip is provided in the groove. The water-stop strip abuts against the guide wall on the same side. The water-stop strip is a water-expanding component. The area between the two guide walls, except for the connector, is filled with concrete. The first direction and the vertical direction are perpendicular.

2. The seepage-proof wall assembly according to claim 1, characterized in that, The connector includes a main body segment, a first segment, and a second segment. The main body segment extends along the first direction. The first segment and the second segment are located at opposite ends of the main body segment along its length and are connected to the main body segment. The groove is located at the end of the first segment opposite to the second segment and at the end of the second segment opposite to the first segment.

3. The seepage-proof wall assembly according to claim 2, characterized in that, The first segment has first extension segments at both ends along the second direction, extending toward the second segment; And / or, the second segment has second extension segments at both ends along the second direction that extend toward the first segment, the first direction, the second direction and the up and down direction being perpendicular to each other.

4. The seepage-proof wall assembly according to claim 2, characterized in that, The connector also includes: The third segment, along the first direction, is located between the first segment and the second segment, and consists of two segments with their ends close to each other connected to the main body segment.

5. The seepage-proof wall assembly according to claim 4, characterized in that, The third paragraph includes: The first sub-segment, one end of which is connected to the main body segment along its length; The second sub-segment has its middle region connected to the end of the first sub-segment that is away from the main body segment.

6. The impermeable wall assembly according to claim 1, characterized in that, The waterstop strip is made of EPDM rubber substrate and mixed with 10%-12% nano montmorillonite.

7. The impermeable wall assembly according to claim 1, characterized in that, On any cross section perpendicular to the vertical direction, the cross section of the groove gradually decreases along the direction from the guide wall to the joint; And / or, the groove extends along the vertical direction.

8. The impermeable wall assembly according to claim 1, characterized in that, The guide wall has an embedded part, a portion of which extends between the two guide walls for positioning the joint.

9. The impermeable wall assembly according to claim 1, characterized in that, The connector has multiple grooves on both ends of the guide wall along the first direction, and the multiple grooves on the same side are spaced apart along the second direction.

10. A construction method for a seepage-proof wall assembly, characterized in that, The cutoff wall assembly includes the cutoff wall assembly according to any one of claims 1-9, and the construction method includes: The waterstop strip is placed in the groove, and the outer surface of the joint, except for the two end faces of the joint that are opposite each other along the first direction, is covered by a dirt-proof membrane. The joint is placed between the two guide walls using a hoisting tool so that the waterstop strip abuts against the guide wall on the same side; After peeling off all the antifouling membranes from the outer surface of the joint, concrete is poured between the two guide walls.

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