CN115928806B - 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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- CN115928806B CN115928806B CN202310038700.9A CN202310038700A CN115928806B CN 115928806 B CN115928806 B CN 115928806B CN 202310038700 A CN202310038700 A CN 202310038700A CN 115928806 B CN115928806 B CN 115928806B
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Abstract
The invention discloses a water stopping device and a water stopping method of an underground concrete diaphragm wall, which belong to the field of seepage prevention of the underground concrete diaphragm wall, wherein the water stopping device comprises a steel plate A, a steel plate B and a rubber water stop belt, the steel plate B comprises a first section of plate part, a second section of plate part and a third section of plate part, the first section of plate part, the second section of plate part and the third section of plate part are sequentially connected, the whole is in a shape, the steel plate B is sleeved on the outer side of the steel plate A, and a cavity is formed between the steel plate B and the steel plate A; the rubber water stop is arranged on the steel plate A in a penetrating way, and part of the rubber water stop stretches 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 water stop can extend out of the cavity under the action of self elastic force. By utilizing the device to stop water, the construction steps in the prior art can be simplified, and the water stop device is convenient to operate by the existing engineering machinery.
Description
Technical Field
The invention belongs to the technical field of underground concrete impervious walls, and particularly relates to a water stopping device and a water stopping method of an underground concrete impervious wall.
Background
As an anti-seepage and enclosing structure commonly used in municipal, building, port and water conservancy fields, the underground concrete anti-seepage wall has the advantages of high structural strength, convenience in construction and the like.
Before the diaphragm wall is poured, the diaphragm wall needs to be mechanically grooved, namely a groove section is formed, and the unit groove section refers to a construction unit which divides the construction of the underground groove into a plurality of certain lengths along the length of the wall. After concrete is poured into each unit groove section to form a diaphragm wall, grooves are continuously formed at the two ends of the unit groove section, namely, new groove sections are continuously formed at the two ends of the unit groove section in the length direction by machinery, and then concrete is continuously poured into the newly formed groove sections to form a new diaphragm wall, and the new diaphragm wall and the diaphragm wall in the previous groove section form a continuous diaphragm wall. The two impervious walls are poured in stages. The water stop 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 quality of the joint water stop device directly influences the impervious capacity on two sides of the groove section.
Application publication number CN109339031A just discloses an underground concrete diaphragm wall joint anti-seepage device, this anti-seepage device includes the first steel sheet of a center area circular arc, the second steel sheet of taking tooth in the circular arc cup joints in first steel sheet, be equipped with rubber sealing tape layer between the two, interlude solid steel pole 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, rubber sealing tape layer between second steel sheet and the first steel sheet is pressed and is out of shape, rubber sealing tape layer blocks on the passageway between the upper and lower both sides surface wall of unit cell section, reach the stagnant water purpose.
The above described anti-seepage device requires rotation of the second steel plate when in use, but it is generally difficult to rotate the second steel plate almost as deep as the groove section, which is almost 50 meters deep. In addition, the two ends of the groove section are provided with the second steel plate, the second steel plate needs space to realize rotation, and the rotation space of the second steel plate is limited by the space of the end of the groove section, so that when the second steel plate needs to be rotated, the space for the rotation of the second steel plate is firstly opened at the two ends of the groove section, the opened space is cleaned, and 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 of an underground concrete diaphragm wall, which aim to solve the technical problems of reducing engineering difficulty and reducing engineering steps in a way of avoiding the use of an original second steel plate to rotate for water stopping.
In order to achieve the above object, the water stop device for an underground concrete diaphragm wall of the present invention comprises:
a steel plate A;
the steel plate B comprises a first section of plate part, a second section of plate part and a third section of plate part, wherein the first section of plate part, the second section of plate part and the third section of plate part are sequentially connected, and the whole steel plate B is ;
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 in the direction 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;
the steel plate A is provided with a strip-shaped hole, a rubber water stop is clamped and fixed in the strip-shaped hole, one part of the rubber water stop stretches into the cavity, and the part of the rubber water stop stretching into the cavity is contacted with the steel plate B, 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 water stop can be stretched under the action of restoring force;
and a limiting structure for preventing the steel plate B from separating from the steel plate A under the elasticity of the rubber water stop is arranged among the first section plate part, the third section plate part and the steel plate A.
Further, the limiting structure comprises a convex strip and two grooves, wherein the convex strip is respectively arranged at the end parts of the first section of plate part and the third section of plate part, and the two grooves are arranged on the outer surface wall of the steel plate A; each raised strip 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 sliding manner through the raised strips and the grooves.
Or the limiting structure comprises a groove respectively arranged at the end parts of the first section of plate part and the third section of plate part, and two raised strips arranged on the outer surface wall of the steel plate A; each raised strip 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 sliding manner through the raised 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 walls of the groove section, and increases the stress area of the whole water stopping device, so that the whole water stopping device can be placed on the bottom wall of the groove section more stably.
Further, the second supporting part and the third supporting part are respectively provided with a lifting structure.
The lifting structure is used for facilitating the engineering machinery to integrally lift the steel plates B and C through the lifting structures on the second supporting part and the third supporting part.
Further, the surface wall thickness of the steel plate B is 5mm or more.
The thickness is designed to be 5mm, the strength requirement of engineering can be met, the material consumption is small, when the steel plate B is hoisted, the load on the engineering machinery is small due to the fact that the material consumption is small and the weight is light, the steel plate B can be hoisted by the engineering machinery and used repeatedly, in the process, the repeated hoisting does not need to have great requirement on the body of the engineering machinery, and the steel plate B is suitable for general engineering machinery.
A water stopping method of an underground concrete diaphragm wall based on the water stopping device of the underground concrete diaphragm wall 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 into the space between the steel plates A of the two water stopping devices by a tube 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 stop 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 to-be-poured area is formed between the steel plate A of each water stop device and the corresponding surface wall of the groove section; the rubber water stops at the two ends lose the limit of the steel plate B, the rubber water stops elastically deform under the action of restoring force and 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 contacted with the surface walls of the corresponding groove sections;
s4: pouring concrete into the to-be-poured area formed in the step S3 continuously by means of a tube 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, the concrete is solidified to form a secondary concrete impervious wall, and the steel plate A and the rubber water stop belt are formed in the secondary concrete impervious wall;
s5: continuously excavating a groove at the tail end of the second-stage concrete impervious wall groove section to form a new groove section, repeating the steps S1-S4 in the new groove section, continuously forming the impervious wall, and integrating the impervious wall with the earlier-stage concrete impervious wall;
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 stop device designed by the invention, the steel plate B and the steel plate C are hung off from the steel plate A as a whole, and can extend out of the cavity and play a role in water stop under the self elastic force of the rubber water stop belt, so that the structural characteristics of the prior art CN109339031A, such as the rotation of the second steel plate, the compression deformation of the rubber water stop belt layer by the second steel plate, and the like, are avoided. The water stop device of the present application is less difficult to operate than the prior art of CN109339031 a.
2. The invention relates to a water stopping method which is matched with a water stopping device for use. The construction steps of grooving at the two ends of the groove section in advance and then cleaning the groove before rotating the second steel plate in the prior art CN109339031A are avoided, and the region for rotating the second steel plate can be reserved. After the steel plate B and the steel plate C are hung off from the steel plate A as a whole, a certain area is naturally reserved between the steel plate A and the two ends of the groove section, a water stopping device can be used without slotting, the step of slotting the two ends of the groove section is avoided, and the construction period is shortened.
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 an underground concrete diaphragm wall water stop;
FIG. 3 is a schematic perspective view of a steel plate A and a rubber water stop;
FIG. 4 is a schematic plan view of a steel plate A and a rubber water stop;
fig. 5 is a schematic perspective view of steel plate B and steel plate C;
fig. 6 is a schematic plan view of steel sheet B and steel sheet C;
FIG. 7 is a schematic diagram of the structure of the trough section and the water stop device after the primary concrete is solidified;
FIG. 8 is a schematic view of the structure of the trough section and the water stop device after the primary concrete is solidified after the steel plate B and the steel plate C are integrally lifted off the steel plate A;
FIG. 9 is a schematic diagram of the structure of the trough section and the water stop device after the secondary concrete is solidified;
fig. 10 is a graph comparing the equivalent average permeability coefficient curves of the prior art and the barrier wall of the present application.
Reference numerals: 1. a rubber water stop; 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-stage plate portion; 4. a steel plate C; 41. a first support portion; 42. a second supporting part; 43. a third supporting part; 5. lifting holes; 6. a steel plate D; 7. a convex strip; 8. a groove; 9. a trough section; 10. a first-stage concrete impervious wall; 11. a second-stage concrete impervious wall; 12. a percolation path.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1 to 6, a water stop device for an underground concrete diaphragm wall comprises a steel plate A2, a steel plate B3, a rubber water stop strip 1 and a steel plate C4.
The steel plate A2 includes, as seen in the direction shown in fig. 2, a first connecting portion 21 having an "L" shape in end face, a second connecting portion 22 having an "" shape in end face, and a third connecting portion 23 having an L-shape in end face; the second connecting portion 22 has a through slot in the shape of . The first connecting portion 21 and the third connecting portion 23 are disposed vertically symmetrically along the second connecting portion 22 in fig. 2. In the present embodiment, the first connecting portion 21, the second connecting portion 22, and the third connecting portion 23 are welded in this order to form a steel plate A2 having an end surface in a shape similar to an "arch" in fig. 2, and the length direction of the steel plate A2 is along the up-down direction in fig. 1.
The steel plate B3 has an end face of a shape of "" in fig. 2, and is opened to the left. The steel plate B3 includes a first-stage plate portion 31 having a one-shaped end, a second-stage plate portion 32 having an i-shaped end, and a third-stage plate portion 33 having a one-shaped end, as viewed in the direction shown in fig. 2. In the present embodiment, the first stage plate portion 31, the second stage plate portion 32, and the third stage plate portion 33 are welded in this order to form a steel plate B3 having an end face of a shape of "" in fig. 2, and the longitudinal direction is along the up-down direction in fig. 1.
In other embodiments, the steel plates A2 and B3 may be integrally formed by machining and bending.
In this embodiment, as shown in fig. 2, the ends of the first and third plate sections 31 and 33 of the steel plate B3, which are far from the second plate section 32 (i.e., the left end in fig. 2), are respectively bent inward to form the convex strips 7, and the convex strips 7 are extended in the up-down direction in fig. 1. Correspondingly, the first connecting portion 21 and the third connecting portion 23 are also respectively bent inwards to form a groove 8, and the steel plate B3 is relatively slidably disposed on the steel plate A2 by means of the protruding strips 7 and the grooves 8, wherein the sliding direction is a direction perpendicular to the paper surface (see fig. 2).
When the raised strips 7 are in the grooves 8, the second plate part 32 and the through groove wall of the second connecting part 22 form a rectangular cavity.
In other embodiments, the limiting structure comprises one groove respectively arranged at the end parts of the first section plate part 31 and the third section plate part 33, and two raised strips arranged on the outer surface wall of the steel plate A; each raised strip 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 sliding manner through the raised strips and the grooves. After the steel plate A and the steel plate B are properly matched, the steel plate A and the steel plate B cannot be separated under the action of the restoring force of the rubber water stop only, and the steel plate A and the steel plate B can be separated under the artificial action.
In the present embodiment, the rubber water stop 1 is provided to pass through the second connecting 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 surface wall, the rubber water stop strip 1 is arranged on the second connecting part 22 in a penetrating way through the strip-shaped hole, the rubber water stop strip 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 rubber water stop strip is positioned outside the cavity and is arranged on the left side of the steel plate A2; the other portion is elastically deformed by the restriction of the steel plate B, is curled in the cavity, and abuts against the left side surface wall of the second stage plate portion 32.
The rubber water stop 1 is limited by the left surface wall of the second section plate part 32 to be curled in the cavity; also, the steel plates A2 and B3 are not separated by the elastic force of the high-strength rubber water stop 1 due to the restriction of the protruding strips 7 and the grooves 8. The deformation restoring force of the rubber water stop 1 can only press the convex strips 7 against the wall of the groove 8.
Referring to fig. 2, the steel plate C4 includes a first support portion 41 having an "-" shaped end surface, a second support portion 42 having a "-" shaped end surface, and a third support portion 43 having an "-" shaped end surface in fig. 2. The second support portion 42 and the third support portion 43 are welded to the left side surface wall of the first support portion 41, and the second support portion 42 and the third support portion 43 are welded to the right side surface wall of the second stage plate portion 32. The second support portion 42 and the third support portion 43 do not contact each other in the up-down direction in fig. 2. The entire length direction of the steel plate C4 is along the up-down direction in fig. 1.
Under the effect of external engineering machinery, after the steel plate B3 and the steel plate C4 are separated from the steel plate A2 along the direction vertical to the paper surface (refer to FIG. 2) as a whole, the deformation of the rubber water stop belt 1 in the cavity can be recovered, the rubber water stop belt 1 arranged at the right end of the groove section 9 is in conflict with the right wall of the groove section 9, the rubber water stop belt 1 arranged at the left end of the groove section 9 is in conflict with the left wall of the groove section 9, and the rubber water stop belt 1 blocks the communication path between the upper wall and the lower wall of the groove section 9, so that the purpose of water stop is achieved, as shown in FIG. 8. The lower end face of the rubber water stop belt 1 is contacted with the bottom face of the groove section.
In order to facilitate the use of the external engineering machinery to hoist the whole of the steel plates B3 and C4, the second support portion 42 and the third support portion 43 are provided with hoisting structures, and in this embodiment, the hoisting mechanism is provided with a plurality of hoisting holes 5 on the second support portion 42 and the third support portion 43, and the plurality of hoisting holes 5 are provided with a plurality of rows at equal intervals along the vertical direction in fig. 1, and in other embodiments, may be other hoisting structures for a hoisting device. The engineering machinery can realize the purpose of integrally lifting the steel plate B3 and the steel plate C4 by means of the tools such as hooks and the like simultaneously hooked in the lifting holes 5. The steel plates B3 and C4 can be reused as a whole. The unified thickness of steel plate B3 steel is more than or equal to 5mm, and this embodiment selects 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 sling or the like provided at the end of the steel plate B3 and/or the steel plate C4. The engineering machinery hooks a hook or a hanging ring through a hanging hook to integrally hang the steel plate B3 and the steel plate C4 away from the steel plate A2.
Embodiment two:
referring to fig. 7-9, a water stopping method for an underground concrete diaphragm wall based on the water stopping device for the underground concrete diaphragm wall comprises the following steps:
s1: two water stopping devices are arranged in the groove section 9 and are positioned 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, symmetrically arranged left and right in fig. 7. The first supporting portions 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: the inside of the groove section 9 is filled with concrete underwater by a tube drawing method, and the concrete is formed between the two water stopping devices. Neither the left side of the left steel plate A2 nor the right side of the right steel plate A2 is concreted, as shown in fig. 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, hang the slot section 9 as whole with steel sheet B3, steel sheet C4 at slot section 9 both ends along the direction of paper perpendicular to the drawing of FIG. 7 through lifting hole 5, the sealing device is because steel sheet B3, steel sheet C4 wholly hangs out slot section 9 and all leaves a space region with the both ends of slot section 9, the rubber waterstop 1 at both ends loses the restriction of steel sheet B3, elastic deformation resumes and extends in enclosing into the cavity from steel sheet A2 and steel sheet B3, rubber waterstop 1 at both ends is contacted with the both ends surface wall of corresponding slot section 9 respectively, separate by rubber waterstop 1 between the upper and lower surface wall of slot section 9 (the upper and lower side of rubber waterstop in FIG. 8), at this moment, play the sealing purpose, the arrow in FIG. 8 indicates the infiltration water direction.
S4: the right side of the right steel plate A2 to the end part of the right side groove section 9 and the left side of the left side steel plate A2 to the end part of the left side groove section 9 are respectively poured with concrete underwater by means of a tube drawing method, the concrete is formed between the steel plate A2 and the surface wall of the end part of the groove section 9, and the concrete is solidified to form the secondary concrete impervious wall 11. The steel plate A2 and the rubber water stop belt 1 are molded in the secondary concrete impervious wall 11 without being taken out, as shown in fig. 9.
S5: continuously excavating a groove at the tail end of the second-stage concrete impervious wall groove section to form a new groove section, repeating the steps S1-S4 in the new groove section, continuously forming the impervious wall, and integrating the impervious wall with the earlier-stage concrete impervious wall;
s6: and (5) repeating the step (S5) according to specific construction requirements to form the integral continuous impervious wall.
The arch-shaped steel plate A effectively prolongs the permeation 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 "bow" shape, forming a folded seepage path 12. In the seepage-proofing device of the underground concrete diaphragm wall joint disclosed in CN109339031A, the seepage path of underground water is a straight line.
For groundwater infiltration, the infiltration degree of difficulty of the infiltration route of buckling formula seepage flow is greater than the straight-line type seepage flow route far away, and in this application, "bow" font steel sheet has increased the concrete impervious path of diaphragm wall comparatively ingenious, has also strengthened the barrier performance of concrete diaphragm wall when reinforcing diaphragm wall bulk strength.
Compared with the anti-seepage device for the underground concrete diaphragm wall joint disclosed in the prior publication number CN109339031A, the anti-seepage device for the underground concrete diaphragm wall joint has the following advantages:
1. when the novel water stopping device is adopted and water is stopped at the two ends of the groove section, the mode of rotating the second steel plate in the prior art is not adopted, and the mode of integrally lifting the steel plate B and the steel plate C is adopted. In the selection of the engineering machinery, the conversion rate of the engineering machinery for enabling the second steel plate to rotate is lower than that of the engineering machinery for enabling the steel plate B and the steel plate C to be integrally lifted, so that the operation difficulty is more difficult, the required body weight of the engineering machinery is larger, and therefore the mode of integrally lifting the steel plate B and the steel plate C is more in line with the actual operation requirement.
2. In this embodiment, by integrally lifting the steel plates B and C out of the groove section, regions for deformation of the rubber water stop are generated at both ends of the groove section. In the prior art, the two ends of the groove section are required to be dug, the second steel plate is rotated, and after the groove section is dug, the dug part of the groove section is required to be cleaned, so that the construction steps are increased, and the construction period is prolonged.
In addition, there is also effect comparison of model experiments:
a geomembrane impermeable gravel dam is positioned on yellow river main flow, the dam top elevation is 1883.50m, the maximum dam height is 23.50m, the normal water storage level of a reservoir is 1880.50m, the geomembrane impermeable gravel dam is connected with a concrete impermeable wall in an upstream cofferdam, the impermeable wall is 60cm thick, and the designed top elevation is 1870.00m. And selecting the range of two adjacent groove sections of the dam impervious wall, taking 4.0m for each groove section, establishing a three-dimensional finite element calculation model, and considering the main structure and stratum of the dam body, wherein 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 (an underground concrete diaphragm wall joint diaphragm wall device disclosed in the prior art CN109339031a, and an diaphragm wall model is built in the application), the average permeability coefficient of the diaphragm wall built by the model is calculated, an equivalent average permeability coefficient change curve of the underground concrete diaphragm wall joint diaphragm wall device disclosed in the prior art CN109339031a and an equivalent average permeability coefficient change curve comparison chart of the application are built, as shown in fig. 10, the abscissa represents time, and the ordinate represents the equivalent average permeability coefficient.
The circular icons in the figure are equivalent average permeability coefficients of the impervious wall of the device, the triangular icons are equivalent average permeability coefficients of the impervious wall in the prior art, wherein the average value of the equivalent average permeability coefficients 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 summary, the permeability coefficient of the device is better than that of the existing device (smaller and better), and the permeability coefficient is different by an order of magnitude. And the equivalent average permeability coefficient of the impervious wall increases with the service years.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (7)
1. A water stop device for an underground concrete diaphragm wall, comprising:
a steel plate A;
the steel plate B comprises a first section of plate part, a second section of plate part and a third section of plate part, wherein the first section of plate part, the second section of plate part and the third section of plate part are sequentially connected, and the whole steel plate B is ;
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 in the direction 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;
the steel plate A is provided with a strip-shaped hole, a rubber water stop is clamped and fixed in the strip-shaped hole, one part of the rubber water stop stretches into the cavity, and the part of the rubber water stop stretching into the cavity is contacted with the steel plate B, 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 water stop can be stretched under the action of restoring force;
and a limiting structure for preventing the steel plate B from separating from the steel plate A under the elasticity of the rubber water stop is arranged among the first section plate part, the third section plate part and the steel plate A.
2. The water stop device of the underground concrete diaphragm wall according to claim 1, wherein the limiting structure comprises a convex strip and two grooves, wherein the convex strip is respectively arranged at the end parts of the first section of plate part and the third section of plate part, and the two grooves are arranged on the outer surface wall of the steel plate A; each raised strip 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 sliding manner through the raised strips and the grooves.
3. The water stop device of the underground concrete diaphragm wall according to claim 1, wherein the limiting structure comprises a groove respectively arranged at the end parts of the first section of plate part and the third section of plate part, and two raised strips arranged on the outer surface wall of the steel plate A; each raised strip 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 sliding manner through the raised strips and the grooves.
4. A water stop device for an underground concrete diaphragm wall according to any one of claims 1 to 3, further comprising a steel plate C, wherein 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 the third supporting portion are connected with the second section plate portion and the first supporting portion, respectively.
5. The water stop device for an underground concrete diaphragm wall according to claim 4, wherein the second supporting portion and the third supporting portion are respectively provided with a lifting structure.
6. The water stop device for an underground concrete diaphragm wall according to claim 1, wherein the thickness of the steel plate B is 5mm or more.
7. A water stopping method of an underground concrete diaphragm wall is characterized in that the water stopping device based on the underground concrete diaphragm wall of claim 4 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 into the space between the steel plates A of the two water stopping devices by a tube 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 stop 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 to-be-poured area is formed between the steel plate A of each water stop device and the corresponding surface wall of the groove section; the rubber water stops at the two ends lose the limit of the steel plate B, the rubber water stops elastically deform under the action of restoring force and 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 contacted with the surface walls of the corresponding groove sections;
s4: pouring concrete into the to-be-poured area formed in the step S3 continuously by means of a tube 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, the concrete is solidified to form a secondary concrete impervious wall, and the steel plate A and the rubber water stop belt are formed in the secondary concrete impervious wall;
s5: continuously excavating a groove at the tail end of the second-stage concrete impervious wall groove section to form a new groove section, repeating the steps S1-S4 in the new groove section, continuously forming the impervious wall, and integrating the impervious wall with the earlier-stage concrete impervious wall;
s6: and (5) repeating the step (S5) according to specific construction requirements to form the integral continuous impervious wall.
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| CN202310038700.9A CN115928806B (en) | 2023-01-13 | 2023-01-13 | Water stopping device and water stopping method for underground concrete diaphragm wall |
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| CN202310038700.9A CN115928806B (en) | 2023-01-13 | 2023-01-13 | Water stopping device and water stopping method for underground concrete diaphragm wall |
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| CN115928806B true CN115928806B (en) | 2023-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101705697B (en) * | 2009-10-23 | 2011-08-10 | 广东省基础工程公司 | Diaphragm wall joint flexible water stop installing device and method |
| CN109339031B (en) * | 2018-11-20 | 2020-10-20 | 南昌工程学院 | Underground concrete continuous wall connects anti-seepage device |
| 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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