CN115928806A - Water stopping device and water stopping method for underground concrete diaphragm wall - Google Patents
Water stopping device and water stopping method for underground concrete diaphragm wall Download PDFInfo
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- CN115928806A CN115928806A CN202310038700.9A CN202310038700A CN115928806A CN 115928806 A CN115928806 A CN 115928806A CN 202310038700 A CN202310038700 A CN 202310038700A CN 115928806 A CN115928806 A CN 115928806A
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Abstract
The invention discloses a water stopping device and a water stopping method for an underground concrete impervious wall, which belong to the field of seepage prevention of the underground concrete impervious wall, and comprise a steel plate A, a steel plate B and a rubber water stopping belt, wherein the steel plate B comprises a first section plate part, a second section plate part and a third section plate part which are sequentially connected, the whole body is in a shape of Contraband, the steel plate B is sleeved on the outer side of the steel plate A, and a cavity is enclosed between the steel plate B and the steel plate A; the rubber water stop is arranged on the steel plate A in a penetrating mode, and one part of the rubber water stop extends into the cavity and is in an elastic deformation state; after the steel plate B is lifted away from the steel plate A, the rubber waterstop can extend out of the cavity under the action of self elasticity. The device is used for stopping water, so that the construction steps in the prior art can be simplified, and the operation of the existing engineering machinery is facilitated.
Description
Technical Field
The invention belongs to the technical field of underground concrete diaphragm walls, and particularly relates to a water stopping device and a water stopping method for an underground concrete diaphragm wall.
Background
As a common seepage-proofing and enclosing structure in the fields of municipal administration, buildings, ports and water conservancy, the underground concrete seepage-proofing wall has the advantages of high structural strength, convenience in construction and the like.
Before the impervious wall is poured, a groove is formed by a machine, namely a groove section is formed, and the unit groove section is a construction unit which divides the construction of an underground groove into a plurality of certain lengths along the wall length. And after concrete is poured in each unit groove section to form the impervious wall, continuously forming grooves at two ends of the unit groove section, namely continuously forming new groove sections at two ends of the unit groove section in the length direction by using machinery, and continuously pouring concrete in the groove sections formed with the new grooves to form new impervious walls, wherein the new impervious walls and the impervious walls in the previous groove sections form a continuous impervious wall. The two impervious walls are poured in stages. The water stopping device is used for stopping water on two sides of the impervious wall after the impervious wall in the unit groove section is poured, and the good and bad of the joint water stopping device directly influences the seepage-proofing capability on two sides of the groove section.
Application publication No. CN109339031A just discloses an underground concrete diaphragm wall connects watertight fittings, this watertight fittings includes the first steel sheet of a center area circular arc, the second steel sheet of tooth is taken in the circular arc, the second steel sheet cup joints in first steel sheet, be equipped with rubber sealing strip layer between the two, solid steel pole has been interlude in the circular arc of second steel sheet, through rotatory solid steel pole, the second steel sheet relies on the circular arc to rotate for first steel sheet, the rubber sealing strip layer between second steel sheet and the first steel sheet receives the pressure deformation, rubber sealing strip layer blocks on the passageway between the upper and lower both sides table wall of unit groove section, reach the stagnant water purpose.
When the anti-seepage device is used, the second steel plate needs to be rotated, but the groove section is nearly 50 meters deep, and the second steel plate which is almost as deep as the groove section is difficult to rotate. In addition, the second steel plate is arranged at the end parts of the two ends of the groove section, the second steel plate needs space to rotate, and because the rotating space of the second steel plate is limited by the space of the end part of the groove section, when the second steel plate needs to rotate, space for the second steel plate to rotate is opened at the two ends of the groove section, and the opened space needs to be cleaned, so that the construction steps are increased.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a water stopping device and a water stopping method for an underground concrete impervious wall, and aims to solve the technical problems that the difficulty of engineering is reduced and engineering steps are reduced by avoiding the original mode of rotating a second steel plate to stop water.
In order to achieve the above object, the present invention provides a water stopping device for an underground concrete cut-off wall, comprising:
a steel plate A;
the steel plate B comprises a first section plate part, a second section plate part and a third section plate part, wherein the first section plate part, the second section plate part and the third section plate part are sequentially connected, and the whole steel plate B is in a shape of Contraband;
the steel plate B is detachably sleeved on the steel plate A through the first section plate part and the third section plate part, the steel plate A is bent towards the direction far away from the second section plate part of the steel plate B to form a through groove, and the groove wall of the through groove and the second section plate part enclose a cavity;
a strip-shaped hole is formed in the steel plate A, a rubber water stop is fixedly embedded in the strip-shaped hole in a clamping manner, one part of the rubber water stop extends into the cavity, and the part of the rubber water stop extending into the cavity is in contact with the steel plate B, is limited by the steel plate B and is in an elastic deformation state; after the steel plate B is separated from the steel plate A, the rubber waterstop can be stretched under the action of restoring force;
and limiting structures for preventing the steel plate B from being separated from the steel plate A under the elasticity of the rubber water stop are arranged between the first section plate part, the third section plate part and the steel plate A.
Furthermore, the limiting structure comprises a convex strip arranged at the end part of the first section plate part and the third section plate part respectively, and two grooves arranged on the outer surface wall of the steel plate A; each convex strip is movably clamped in the corresponding groove and matched with the corresponding groove, and the steel plate B is arranged on the steel plate A in a relative sliding way through the convex strips and the grooves.
Or the limiting structure comprises a groove and two convex strips, wherein the groove is respectively arranged at the end parts of the first section plate part and the third section plate part, and the two convex strips are arranged on the outer surface wall of the steel plate A; each convex strip is movably clamped in the corresponding groove and matched with the corresponding groove, and the steel plate B is arranged on the steel plate A in a relative sliding way through the convex strips and the grooves.
Further, the water stopping device further comprises a steel plate C, the steel plate C comprises a first supporting portion, a second supporting portion and a third supporting portion, the second supporting portion and the third supporting portion are located between the second section plate portion and the first supporting portion, and two ends of the second supporting portion and two ends of the third supporting portion are connected with the second section plate portion and the first supporting portion respectively.
The steel plate C can support the groove walls at the two ends of the groove section, has a certain supporting effect on the groove wall of the groove section, and increases the stress area of the whole water stopping device, so that the whole water stopping device can be more stably placed on the bottom wall of the groove section.
Furthermore, the second supporting part and the third supporting part are both provided with hoisting structures.
The lifting structure is used for facilitating the engineering machinery to integrally lift the steel plate B and the steel plate C through the lifting structure on the second supporting part and the third supporting part.
Furthermore, the surface wall thickness of the steel plate B is more than or equal to 5mm.
The thickness is designed to be 5mm, the strength requirement of engineering can be met, the material consumption is low, the weight is light due to the fact that the material consumption is low, the load on engineering machinery is not large, the engineering machinery can lift the steel plate B and can be used repeatedly, and in the process, repeated lifting does not need to have great requirements on the volume of the engineering machinery, and the steel plate B hoisting device is suitable for general engineering machinery.
A water stopping method of an underground concrete impervious wall is based on a water stopping device of the underground concrete impervious wall and comprises the following steps:
s1: placing two water stopping devices in the groove section and at two ends of the groove section, wherein the two water stopping devices are symmetrically arranged along the length direction of the groove section, and the surface walls of the first supporting parts of the two water stopping devices are respectively contacted with the corresponding surface walls at two ends of the groove section in the length direction;
s2: pouring concrete underwater between the steel plates A of the two water stopping devices by a pipe drawing method, and forming a first-stage concrete impervious wall between the steel plates A of the two water stopping devices after the concrete is solidified;
s3: lifting the steel plate B and the steel plate C of each water stopping device out of the groove section as a whole, and separating the steel plate B and the steel plate C from the steel plate A as a whole, so that a region to be cast is formed between the steel plate A of each water stopping device and the surface wall of the corresponding groove section; the rubber water stops at the two ends lose the limit of the steel plate B, and are elastically deformed under the action of restoring force to extend out of a cavity surrounded by the steel plate A and the steel plate B, and the tail ends of the rubber water stops are in contact with the surface wall of the corresponding groove section;
s4: continuously pouring concrete into the area to be poured formed in the step S3 by means of a pipe drawing method, wherein the concrete is formed between the corresponding steel plate A and the surface wall of the end part of the groove section, and after the concrete is solidified, the concrete becomes a second-stage concrete impervious wall, and the steel plate A and the rubber water stop are formed in the second-stage concrete impervious wall;
s5: continuously excavating a groove at the tail end of the groove section of the second-stage concrete impervious wall to form a new groove section, repeating the steps S1-S4 in the new groove section to continuously form the impervious wall, and forming the impervious wall integrally with the impervious wall formed in the earlier stage;
s6: and (5) repeating the step S5 according to specific construction requirements to form the integral continuous impervious wall.
Compared with the prior art, the method has the following beneficial effects:
1. according to the water stopping device designed by the invention, the steel plate B and the steel plate C are only required to be lifted away from the steel plate A as a whole, and can extend out of the cavity and achieve the purpose of stopping water under the action of the elasticity of the rubber water stopping belt, so that the structural characteristics that the second steel plate is rotated to deform the rubber water stopping belt layer in a compression mode in the CN109339031A in the prior art are avoided. Compared with the prior art of CN109339031A, the water stopping device of the application has lower operation difficulty.
2. The invention relates to a water stopping method which is matched with a water stopping device for use. The construction steps that before the second steel plate is rotated in CN109339031A in the prior art, grooves need to be formed in the two ends of the groove section in advance, and then the grooves are cleaned, so that the area for the second steel plate to rotate can be reserved are avoided. This application has adopted steel sheet B and steel sheet C to hang as whole from steel sheet A after, naturally leaves certain region between steel sheet A and groove section both ends, need not to slot again and just can use watertight fittings, has avoidd the step of slotting again at groove section both ends, has shortened the time limit for a project.
Drawings
FIG. 1 is a schematic perspective view of a water stop device for an underground concrete diaphragm wall;
FIG. 2 is a schematic plan view of a water stopping device for an underground concrete diaphragm wall;
FIG. 3 is a schematic perspective view of a steel plate A and a rubber waterstop;
FIG. 4 is a schematic plan view of a steel plate A and a rubber waterstop;
FIG. 5 is a schematic perspective view of steel plates B and C;
FIG. 6 is a schematic plan view of steel plate B and steel plate C;
FIG. 7 is a schematic structural view of the trough section and the water stopping device after the first stage concrete is solidified;
FIG. 8 is a schematic structural diagram of a groove section and a water stopping device after a steel plate B and a steel plate C are lifted away from a steel plate A as a whole and concrete is solidified for the first time;
FIG. 9 is a schematic structural view of the trough section and the water stopping device after the second stage concrete is solidified;
FIG. 10 is a graph comparing the equivalent average permeability coefficient of the diaphragm wall of the prior art and the present application.
Reference numerals: 1. a rubber waterstop; 2. a steel plate A; 21. a first connection portion; 22. a second connecting portion; 23. a third connecting portion; 3. a steel plate B; 31. a first-stage plate portion; 32. a second-stage plate portion; 33. a third plate portion; 4. a steel plate C; 41. a first support section; 42. a second support portion; 43. a third support portion; 5. lifting holes; 6. a steel plate D; 7. a convex strip; 8. a groove; 9. a trough section; 10. first-stage concrete impervious walls; 11. a second-stage concrete impervious wall; 12. a percolation path.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.
The first embodiment is as follows:
referring to fig. 1-6, the water stopping device for the underground concrete impervious wall comprises a steel plate A2, a steel plate B3, a rubber water stopping belt 1 and a steel plate C4.
The steel plate A2 includes, as viewed in the direction shown in fig. 2, a first connecting portion 21 having an end surface in an "L" shape, a second connecting portion 22 having an end surface in an "Contraband" shape, and a third connecting portion 23 having an end surface in an L shape; the second connecting portion 22 has a through groove in the shape of Contraband. The first connection portion 21 and the third connection portion 23 are arranged symmetrically up and down in fig. 2 along the second connection portion 22 as a whole. In this embodiment, the first connecting portion 21, the second connecting portion 22 and the third connecting portion 23 are welded and connected in sequence to form a steel plate A2 having an end face shaped like a "bow" in fig. 2, and the length direction of the steel plate A2 is along the vertical direction in fig. 1.
The steel plate B3 has an end face in fig. 2 in the shape of "Contraband" with the opening facing to the left. The steel plate B3 includes, as viewed in the direction shown in fig. 2, a first plate section 31 having an "one" shape at an end, a second plate section 32 having an "i" shape, and a third plate section 33 having a "one" shape. In this embodiment, the first plate section 31, the second plate section 32, and the third plate section 33 are welded and connected in this order to form a steel plate B3 having an end surface of "Contraband" in fig. 2, and the longitudinal direction is along the vertical direction in fig. 1.
In other embodiments, the steel plates A2 and B3 may be integrally formed by bending by machining.
In this embodiment, referring to fig. 2, the end portions of one ends (i.e., the left end in fig. 2) of the first section plate portion 31 and the third section plate portion 33, which are away from the second section plate portion 32, of the steel plate B3 are respectively bent inward to form the convex strips 7, and the convex strips 7 extend in the up-and-down direction in fig. 1. Correspondingly, the first connecting portion 21 and the third connecting portion 23 are also bent inward to form the groove 8, and the steel plate B3 is slidably disposed on the steel plate A2 by means of the convex strips 7 and the groove 8, the sliding direction being perpendicular to the paper (see fig. 2).
When the rib 7 is located in the groove 8, the second section plate portion 32 and the through groove wall of the second connecting portion 22 form a rectangular cavity.
In other embodiments, the limiting structure includes a groove disposed at the end of the first section plate 31 and the end of the third section plate 33, and two convex strips disposed on the outer wall of the steel plate a; each convex strip is movably clamped in the corresponding groove and matched with the corresponding groove, and the steel plate B is arranged on the steel plate A in a relative sliding way through the convex strips and the grooves. As long as guarantee steel sheet A and steel sheet B adaptation cover establish the back, under the effect of only rubber waterstop restoring force, steel sheet A can not break away from with steel sheet B, and can make steel sheet A and steel sheet B separate under the human effect can.
In the present embodiment, the rubber waterstop 1 is threaded on the second connection portion 22 in the left-right direction in fig. 2. A strip-shaped hole (not shown) is formed in the surface wall of the second connecting part 22 along the length direction of the second connecting part, the rubber water stop 1 penetrates through the second connecting part 22 through the strip-shaped hole, the rubber water stop 1 is fixedly clamped in the strip-shaped hole and is divided into two parts by the second connecting part 22, and one part of the two parts is positioned outside the cavity and is arranged on the left side of the steel plate A2; the other part is elastically deformed by being restricted by the steel plate B, is curled in the cavity, and is abutted against the left side surface wall of the second plate part 32.
The rubber water stop 1 is coiled in the cavity because of being limited by the left front wall of the second section plate part 32; the steel plate A2 and the steel plate B3 are not separated by the elastic force of the high-strength rubber waterstop 1, limited by the ridges 7 and the grooves 8. The deformation restoring force of the rubber water stop 1 can only push the convex strip 7 against the groove wall of the groove 8.
Referring to fig. 2, the steel plate C4 includes a first support portion 41 having an i-shape in fig. 2, a second support portion 42 having a i-shape in fig. 2, and a third support portion 43 having a i-shape in fig. 2. The second and third support portions 42 and 43 are welded to the left side surface wall of the first support portion 41, and the second and third support portions 42 and 43 are welded to the right side surface wall of the second plate portion 32. The second support portion 42 and the third support portion 43 do not contact each other in the vertical direction in fig. 2. The steel plate C4 has an entire length direction along the vertical direction in fig. 1.
Under the action of external engineering machinery, after the steel plate B3 and the steel plate C4 are separated from the steel plate A2 as a whole along the direction perpendicular to the paper surface (refer to fig. 2), the deformation of the rubber water stop 1 in the cavity can be recovered, the rubber water stop 1 arranged at the right end of the groove section 9 is abutted against the right wall of the groove section 9, the rubber water stop 1 arranged at the left end of the groove section 9 is abutted against the left wall of the groove section 9, and the rubber water stop 1 blocks the communication path between the upper wall and the lower wall of the groove section 9, so that the purpose of stopping water is achieved, as shown in fig. 8. The lower end face of the rubber water stop 1 is in contact with the bottom face of the groove section.
In order to facilitate the use of external engineering machinery to lift the whole of the steel plate B3 and the steel plate C4, the second support portion 42 and the third support portion 43 are provided with lifting structures, the lifting mechanism in this embodiment is that the second support portion 42 and the third support portion 43 are provided with a plurality of lifting holes 5, the plurality of lifting holes 5 are provided with a plurality of rows at equal intervals along the vertical direction in fig. 1, and in other embodiments, other lifting structures for the lifting device may be used. The engineering machinery can realize the purpose of integrally hoisting the steel plate B3 and the steel plate C4 by means of tools such as hooks and the like in each hoisting hole 5. The steel plate B3 and the steel plate C4 can be reused as a whole. The uniform thickness of steel plate B3 steel is more than or equal to 5mm, and this embodiment is selected to be 5mm, guarantees the minimum structural strength of device, and weight can not be too heavy simultaneously.
In other embodiments, the lifting structure may be a hook or a lifting ring or the like disposed at the end of the steel plate B3 and/or the steel plate C4. The engineering machinery hooks the hook or the hanging ring through the lifting hook to integrally lift the steel plate B3 and the steel plate C4 away from the steel plate A2.
Example two:
referring to fig. 7-9, a method for stopping water in an underground concrete diaphragm wall, based on the water stopping device of the underground concrete diaphragm wall, comprises the following steps:
s1: two water stopping devices are placed in the groove section 9 and located at two ends of the groove section 9, and the two water stopping devices are symmetrically arranged along the length direction of the groove section 9, namely, are symmetrically arranged left and right along the figure 7. The surface walls of the first supporting parts 41 of the steel plates C4 of the two water stop devices are respectively in contact with the surface walls of the two ends of the corresponding groove section 9.
S2: concrete is poured into the groove section 9 underwater through a pipe drawing method, and the concrete is formed between the two water stopping devices. Concrete is not poured on the left side of the left steel plate A2 and the right side of the right steel plate A2, and the concrete is shown in figure 7. After the concrete is solidified, a first-stage concrete impervious wall 10 is formed between the two water stopping devices.
S3: through engineering machinery, steel plates B3 and C4 at two ends of a groove section 9 are hoisted out of the groove section 9 as a whole through hoisting holes 5 along the direction perpendicular to the paper surface of a drawing 7, a space area is reserved at two ends of a water stopping device and the groove section 9 due to the fact that the steel plates B3 and C4 are hoisted out of the groove section 9 integrally, rubber water stops 1 at two ends lose the limit of the steel plates B3 and are recovered and extended out from elastic deformation in a cavity defined by the steel plates A2 and the steel plates B3, the rubber water stops 1 at two ends are respectively in contact with two end surface walls of the corresponding groove section 9, the upper surface wall and the lower surface wall of the groove section 9 are separated by the rubber water stops 1 (the upper side and the lower side of the rubber water stops in the drawing 8), the lower end surface of the rubber water stops 1 is in contact with the bottom surface of the groove section, at the moment, the purpose of water stopping is achieved, and the arrow in the drawing 8 indicates the seepage and water incoming direction.
S4: concrete is poured into the end portion of the right side groove section 9 from the right side of the right side steel plate A2 and the end portion of the left side groove section 9 from the left side of the left side steel plate A2 through a pipe drawing method, the concrete is formed between the steel plate A2 and the surface wall of the end portion of the groove section 9, and after the concrete is solidified, the second-stage concrete impervious wall 11 is formed. The steel plate A2 and the rubber water stop 1 are formed in the second-stage concrete impervious wall 11 without being taken out, as shown in FIG. 9.
S5: continuously excavating a groove at the tail end of the groove section of the second-stage concrete impervious wall to form a new groove section, repeating the steps S1-S4 in the new groove section to continuously form the impervious wall, and forming the impervious wall integrally with the impervious wall formed in the earlier stage;
s6: and (5) repeating the step S5 according to specific construction requirements to form the integral continuous impervious wall.
The arched steel plate A effectively prolongs the seepage path 12 of the impervious wall while forming the rubber water stop. Referring to fig. 8 and 9, after the first-stage concrete and the second-stage concrete are poured, the seepage path 12 of the groundwater is shown by gray arrows in fig. 8 and 9, that is, the groundwater seeps along the surface wall of the arch shape, and a bent seepage path 12 is formed. CN109339031A discloses an underground concrete diaphragm wall connects anti-seepage device, the seepage flow path of groundwater is a straight line.
For the permeation of underground water, the permeation difficulty of the bent seepage path is far greater than that of the linear seepage path, in the application, the arch-shaped steel plate skillfully increases the concrete seepage-proofing path of the seepage-proofing wall, and the seepage-proofing performance of the concrete seepage-proofing wall is enhanced while the integral strength of the seepage-proofing wall is enhanced.
Compared with the seepage-proofing device for the underground concrete continuous wall joint disclosed by the prior publication number CN109339031A, the seepage-proofing device has the advantages that:
1. by adopting the new water stopping device, when water is stopped at two ends of the groove section, the mode of rotating the second steel plate in the prior art is not adopted, but the mode of integrally hoisting the steel plate B and the steel plate C is adopted. In the aspect of selection of the engineering machinery, the engineering machinery for rotating the second steel plate has lower conversion rate than the engineering machinery for integrally hoisting the steel plate B and the steel plate C, so the operation difficulty is more difficult, the required quantity of the engineering machinery is larger, and the mode for integrally hoisting the steel plate B and the steel plate C meets the requirement of actual operation better.
2. In this embodiment, through hanging out the steel sheet B, steel sheet C whole groove section, just produced the region that supplies rubber waterstop deformation at the both ends of groove section. In the prior art, two ends of the groove section need to be dug, then the second steel plate is rotated, and after the groove section is dug, the dug part of the groove section needs to be cleaned, so that the construction steps are increased, and the construction period is prolonged.
In addition, there is a comparison of the effects of the model experiment:
a certain geomembrane seepage-proofing gravel dam is positioned on the dry flow of a yellow river, the dam top elevation 1883.50m, the maximum dam height 23.50m and the normal water storage level 1880.50m of a reservoir are connected with a concrete seepage-proofing wall in an upstream cofferdam, the thickness of the seepage-proofing wall is 60cm, and the designed top elevation is 1870.00m. Selecting the range of two adjacent groove sections of the impervious wall of the dam, wherein each groove section is 4.0m, establishing a three-dimensional finite element calculation model, and considering the main structure and the stratum of the dam body, and the calculation parameters of each material partition are shown in the following table.
TABLE 1 calculation parameters for each Material partition
After the diaphragm wall model is built according to the data in table 1 (a diaphragm wall model is built for each diaphragm wall joint diaphragm device disclosed in CN109339031a in the prior art and a diaphragm wall model is built in the present application), the average permeability coefficient of the diaphragm wall built by the model is calculated, and an equivalent average permeability coefficient change curve of the diaphragm wall joint diaphragm device disclosed in CN109339031a in the prior art and a comparison graph of the equivalent average permeability coefficient change curve of the present application are built, as shown in fig. 10, the abscissa represents time, and the ordinate represents the equivalent average permeability coefficient.
In the figure, the circular icon is the equivalent average permeability coefficient of the impervious wall of the device, the triangular icon is the equivalent average permeability coefficient of the impervious wall under the prior art, wherein the average value of the equivalent average permeability coefficient of the technology of the device is 1.53 multiplied by 10 -7 The average value of the equivalent average permeability coefficient of the prior device technology is 1.42 multiplied by 10 -6 . In conclusion, the permeability coefficient of the device is better than that of the prior device (the smaller the device is better), and the two are different by an order of magnitude. And the equivalent average permeability coefficient of the impervious wall increases along with the increase of service years as time goes on.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A water stopping device of an underground concrete impervious wall is characterized by comprising:
a steel plate A;
the steel plate B comprises a first section plate part, a second section plate part and a third section plate part, and the first section plate part, the second section plate part and the third section plate part are sequentially connected and are integrally shaped as Contraband;
the steel plate B is detachably sleeved on the steel plate A through the first section plate part and the third section plate part, the steel plate A is bent towards the direction far away from the second section plate part of the steel plate B to form a through groove, and the groove wall of the through groove and the second section plate part enclose a cavity;
a strip-shaped hole is formed in the steel plate A, a rubber water stop is fixedly embedded in the strip-shaped hole in a clamping manner, one part of the rubber water stop extends into the cavity, and the part of the rubber water stop extending into the cavity is in contact with the steel plate B, is limited by the steel plate B and is in an elastic deformation state; after the steel plate B is separated from the steel plate A, the rubber waterstop can be stretched under the action of restoring force;
and limiting structures for preventing the steel plate B from being separated from the steel plate A under the elasticity of the rubber water stop are arranged between the first section plate part, the third section plate part and the steel plate A.
2. The water stopping device for the underground concrete impervious wall as claimed in claim 1, wherein the limiting structure comprises a convex strip arranged at the end part of the first section plate part and the third section plate part respectively, and two grooves arranged on the outer wall of the steel plate A; each convex strip is movably clamped in the corresponding groove and matched with the corresponding groove, and the steel plate B is arranged on the steel plate A in a relative sliding way through the convex strips and the grooves.
3. The water stopping device for the underground concrete impervious wall as claimed in claim 1, wherein the limiting structure comprises a groove respectively arranged at the end parts of the first section plate part and the third section plate part, and two convex strips arranged on the outer surface wall of the steel plate A; each raised line is movably clamped in the corresponding groove and is matched with the corresponding groove, and the steel plate B is arranged on the steel plate A in a relative sliding way through the raised lines and the grooves.
4. A water stopping device for an underground concrete impervious wall according to any one of claims 1 to 3, wherein the water stopping device further comprises a steel plate C, the steel plate C comprises a first supporting part, a second supporting part and a third supporting part, the second supporting part and the third supporting part are positioned between the second section plate part and the first supporting part, and two ends of the second supporting part and the third supporting part are respectively connected with the second section plate part and the first supporting part.
5. The water stopping device for the underground concrete impervious wall according to claim 4, wherein the second supporting part and the third supporting part are respectively provided with a lifting structure.
6. The water stopping device of an underground concrete impervious wall according to claim 1, wherein the thickness of the steel plate B is greater than or equal to 5mm.
7. A water stopping method of an underground concrete diaphragm wall is characterized in that the water stopping device of the underground concrete diaphragm wall based on any one of claims 1 to 6 comprises the following steps,
s1: placing two water stopping devices in the groove section and at two ends of the groove section, wherein the two water stopping devices are symmetrically arranged along the length direction of the groove section, and the surface walls of the first supporting parts of the two water stopping devices are respectively contacted with the corresponding surface walls at two ends of the groove section in the length direction;
s2: pouring concrete underwater between the steel plates A of the two water stopping devices by a pipe drawing method, and forming a first-stage concrete impervious wall between the steel plates A of the two water stopping devices after the concrete is solidified;
s3: lifting the steel plate B and the steel plate C of each water stopping device out of the groove section as a whole, and separating the steel plate B and the steel plate C from the steel plate A as a whole, so that a region to be cast is formed between the steel plate A of each water stopping device and the surface wall of the corresponding groove section; the rubber water stops at the two ends lose the limit of the steel plate B, and are elastically deformed under the action of restoring force to extend out of a cavity surrounded by the steel plate A and the steel plate B, and the tail ends of the rubber water stops are in contact with the surface wall of the corresponding groove section;
s4: continuously pouring concrete into the area to be poured formed in the step S3 by means of a pipe drawing method, wherein the concrete is formed between the corresponding steel plate A and the surface wall of the end part of the groove section, and after the concrete is solidified, the concrete becomes a second-stage concrete impervious wall, and the steel plate A and the rubber water stop are formed in the second-stage concrete impervious wall;
s5: continuously excavating a groove at the tail end of the groove section of the second-stage concrete impervious wall to form a new groove section, repeating the steps S1-S4 in the new groove section to continuously form the impervious wall, and forming the impervious wall integrally with the impervious wall formed in the earlier stage;
s6: and (5) repeating the step S5 according to specific construction requirements to form the integral continuous impervious wall.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705697A (en) * | 2009-10-23 | 2010-05-12 | 广东省基础工程公司 | Diaphragm wall joint flexible water stop installing device and method |
| CN109339031A (en) * | 2018-11-20 | 2019-02-15 | 南昌工程学院 | A kind of buried concrete continuous wall connector percolator |
| CN111119194A (en) * | 2019-12-28 | 2020-05-08 | 常州工学院 | Continuous wall joint structure and construction method thereof |
| CN211006726U (en) * | 2019-10-21 | 2020-07-14 | 湖北广元岩土工程有限公司 | Underground continuous wall antiseep structure |
| CN212248382U (en) * | 2020-03-27 | 2020-12-29 | 中交第三公路工程局有限公司工程总承包分公司 | Underground continuous wall seam water stopping device |
-
2023
- 2023-01-13 CN CN202310038700.9A patent/CN115928806B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705697A (en) * | 2009-10-23 | 2010-05-12 | 广东省基础工程公司 | Diaphragm wall joint flexible water stop installing device and method |
| CN109339031A (en) * | 2018-11-20 | 2019-02-15 | 南昌工程学院 | A kind of buried concrete continuous wall connector percolator |
| CN211006726U (en) * | 2019-10-21 | 2020-07-14 | 湖北广元岩土工程有限公司 | Underground continuous wall antiseep structure |
| CN111119194A (en) * | 2019-12-28 | 2020-05-08 | 常州工学院 | Continuous wall joint structure and construction method thereof |
| CN212248382U (en) * | 2020-03-27 | 2020-12-29 | 中交第三公路工程局有限公司工程总承包分公司 | Underground continuous wall seam water stopping device |
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