Water-stopping structure for building foundation and construction method thereof

Abstract

The present invention relates to the technical field of building waterproofing, and specifically discloses a water-stopping structure for building foundation and a construction method thereof, comprising a first ground beam and a second ground beam, a post-cast strip is cast between the first ground beam and the second ground beam, anchor rods are arranged on both sides of the outer surface of the post-cast strip, a fixing frame is clamped with the anchor rods on both sides of the outer surface of the post-cast strip, a cavity is opened at the bottom of the fixing frame, and a reflux component is arranged in the cavity. The present invention can achieve a good water-stopping effect on the joint of the post-cast strip by arranging the reflux component, and reduce the corrosion of the steel bars inside the post-cast strip; by arranging the drainage component, the probability of mud and sand blockage in the overflow trough can be reduced, and the stability of the reflux component during operation can be ensured; by arranging the extrusion component, the friction between the water-stop strip and the post-cast strip can be increased, and the contact tightness between the water-stop strip and the post-cast strip can be further improved, so as to effectively improve the sealing effect on the joint of the water-stop strip.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproofing, and specifically discloses a water-stopping structure for a building foundation and a construction method thereof. Background Art

[0002] The building foundation is the load-bearing structure below the ground of the building. It bears the loads transmitted from the superstructure and transmits them together with its own weight to the foundation. Waterproofing of the building foundation is a key measure to prevent groundwater infiltration and leakage. In construction projects, the waterproof performance of the building foundation is directly related to the structural safety and service life of the building. Therefore, it is very important to adopt an effective waterstopping solution. Commonly used waterstopping methods include waterstop strips, spraying, grouting, etc.

[0003] Chinese patent CN218597068U discloses an automatically rising and falling water-stop structure. When encountering a flood or rising water level, the water-stop wall of the water-stop structure will automatically rise due to the buoyancy to block the flood, thereby achieving the purpose of flood prevention and protecting people's lives and property. When the water level drops, the water-stop wall will also drop with the water level, thereby not affecting other use functions of the ground foundation of the water-stop structure.

[0004] Although the water-stopping structure of the above-mentioned patent can improve the water-stopping effect of the building to a certain extent by setting up a movable water-stopping wall, for the underlying building foundation structure, especially the building foundation structure such as the ground beam, during the construction process, in order to prevent the cast-in-place reinforced concrete structure from causing harmful cracks due to its own uneven shrinkage or uneven settlement, a post-cast strip will be left at the corresponding position of the ground beam, and the post-cast strip will be cast after the main structure is completed and most of the settlement is completed. There is a certain gap between the post-cast strip and the main building, and groundwater will penetrate into the ground beam through the gap, which will cause corrosion and aging of the steel bars inside the ground beam, and further affect the service life of the building foundation. Summary of the invention

[0005] In view of the above deficiencies in the prior art, the present invention provides a water-stop structure for a building foundation and a construction method thereof, so as to solve the problem that there is a certain gap between the post-cast strip of the building foundation structure at the bottom, especially the building foundation structure such as the ground beam, and the main building, and groundwater will penetrate into the ground beam through the gap, thereby causing corrosion and aging of the steel bars inside the ground beam, and further affecting the service life of the building foundation.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] The water-stop structure for building foundation comprises a first ground beam and a second ground beam, a post-cast strip is cast between the first ground beam and the second ground beam, anchor rods are arranged on both sides of the outer surface of the post-cast strip, a fixing frame is clamped with the anchor rods on both sides of the outer surface of the post-cast strip, a cavity is opened at the bottom of the fixing frame, and a reflux component is arranged in the cavity;

[0008] The reflux component includes a baffle plate 1 fixedly connected to the lower end surfaces of ground beams 1 and 2, a sealing sleeve fixedly connected to the outer surface of the baffle plate 1, overflow grooves are provided at both ends of the bottom of the outer surface of the fixing frame, a water-soluble baffle is fixedly connected inside the overflow groove, a water-stop curtain is fixedly connected to the side of the outer surface of the sealing sleeve close to the overflow groove, the end of the water-stop curtain away from the sealing sleeve is fixedly connected to the inner surface of the cavity, the height of the connection between the water-stop curtain and the sealing sleeve is higher than the height of the connection between the water-stop curtain and the cavity, the connection between the water-stop curtain and the cavity is arranged in conjunction with the bottom end of the overflow groove, a sensitive spring is fixedly connected to the lower end surface of the water-stop curtain, and the lower end of the sensitive spring is fixedly connected to the lower end of the inner surface of the cavity.

[0009] Furthermore, the water stop curtain is made of flexible material, the overflow grooves are in several groups and distributed in a linear array, a one-way valve is arranged inside the overflow groove, the sealing sleeve has a rectangular cross-section, the sealing sleeve is made of elastic rubber material, the fixing frame and the cavity are U-shaped as a whole, and steel bars are arranged inside the ground beam 1, ground beam 2 and the post-cast strip.

[0010] Furthermore, a drainage assembly is provided in the sealing sleeve, and the drainage assembly includes baffle plate 2 fixedly connected to the inner surface of the sealing sleeve close to the water stop curtain, an elastic plate is fixedly connected between the inner surface of the sealing sleeve close to baffle plate 1 and baffle plate 2, traction strips are fixedly connected on both sides of the inner surface of the elastic plate, and a connecting block is fixedly connected between the two groups of traction strips.

[0011] Furthermore, the elastic plate is arc-shaped, the connecting block is made of water-soluble material, both ends of the outer surfaces of the ground beam one and the ground beam two are symmetrically fixedly connected with the arc plate and the support plate by cooperating with the fixing frame, and one end of the arc plate and the support plate away from the outer surfaces of the ground beam one and the ground beam two is fixedly connected with the fixing frame.

[0012] Furthermore, brackets are fixedly connected on both sides of the bottom of the inner surface of the cavity, and the bracket is U-shaped as a whole. The two groups of brackets are respectively located at the joints of the post-cast strip and the ground beam one and the ground beam two. An extrusion component is arranged in the bracket, and the extrusion component includes an air cavity two embedded in the bracket, a piston plate one is slidably connected to the inner surface of the air cavity two, a sealing block is fixedly connected to the middle part of the upper end of the piston plate one, the sealing block passes through the upper end of the bracket, and the sealing block is slidably connected to the bracket.

[0013] Furthermore, an air cavity 1 is opened in the bracket, and a piston plate 2 is slidably connected to the inner surface of the air cavity 1, and a top plate is fixedly connected to the upper end surface of the piston plate 2. The air cavity 1, piston plate 2 and top plate are each divided into two groups and are symmetrically arranged on both sides of the air cavity 2. A waterstop is arranged on the upper end surface of the bracket, and the upper end surface of the waterstop is tightly fitted with the lower end surface of the post-casting strip. The air cavity 1 and the air cavity 2 are connected by a through groove, and a partition is fixedly connected to the lower end of the inner surface of the cavity, and the partition is located between the drainage component and the extrusion component.

[0014] Furthermore, four groups of sealing components are arranged in the cavity, and the four groups of sealing components are respectively arranged at the joints on both sides of the post-cast strip and the ground beam one and the ground beam two. The sealing component includes a rotating shaft rotatably connected to the lower end of the inner surface of the cavity, and a flap is symmetrically fixedly connected to the outer surface of the rotating shaft. A movable plate is slidably connected to the inner surface of the cavity in cooperation with the flap, and a waterstop strip is fixedly connected to the side wall of the movable plate away from the movable plate. The waterstop strip is arranged at the joints on both sides of the post-cast strip and the ground beam one and the ground beam two. Waterstop steel plates are fixedly arranged at the joints on both sides of the post-cast strip and the ground beam one and the ground beam two. The arc plate and the support plate are located on the opposite sides of the two groups of sealing components on the same side.

[0015] Furthermore, the inner surface of the cavity is fixedly connected with an expansion block in cooperation with the flap, the expansion blocks are in several groups and distributed in a parallel array, one end of the expansion block away from the fixed frame is in sliding contact with the flap, the expansion block is made of expansion rubber material, and the flap is in sliding contact with the movable plate.

[0016] Furthermore, a clamping assembly is provided at the top outer side of the fixing frame, and the clamping assembly includes guide strips fixedly connected to the tops of both ends of the outer surface of the post-cast strip, and a cover plate is slidably connected to the upper end surface of the fixing frame, and the cover plate is in an inverted U shape as a whole, and guide grooves are provided on both sides of the inner surface of the cover plate, and the guide strips are slidably arranged in the guide grooves, and the anchor rod is in an L shape as a whole, and slots are provided at both ends of the inner surface of the fixing frame, and the anchor rod is clamped in the slots, and a limiting block is fixedly connected to the upper end of the inner surface of the slot, and an extrusion plate is fixedly connected to the side of the limiting block close to the anchor rod, and the extrusion plate is in an arc shape as a whole, and the extrusion plate fits tightly with the anchor rod.

[0017] The construction method of the water-stop structure for building foundation comprises the following steps:

[0018] S1: The fixing frame is clamped at the joints between the post-casting belt and the first and second ground beams, and the fixing frame is wrapped around the outside of the post-casting belt to perform preliminary sealing on the joints;

[0019] S2: When water penetrates into the joint, the sensitive spring drives the water-stop curtain to shake under the action of the gravity of the water, so that the water on the surface of the water-stop curtain is discharged outward through the overflow groove;

[0020] S3: The sealing sleeve is expanded by the elastic plate, and the residual water in the cavity is squeezed out by the expansion of the sealing sleeve, thereby reducing the residual water at the joint;

[0021] S4: The top plate is driven to move upward synchronously by the second piston plate, and the water stop strips on both sides of the joint of the post-casting strip are squeezed by the two sets of top plates, and the sealing block is used to make the water stop strips closely fit the lower end surfaces of the post-casting strip, the first ground beam and the second ground beam;

[0022] S5: When one end of the flap contacts the inner wall of the cavity, the other end of the flap contacts the lower end surface of the movable plate, and the flap is used to seal between the movable plate and the cavity;

[0023] S6: The flap pushes the movable plate and the water stop strip to move to one side of the post-casting strip, and the movable plate is used to press the water stop strip against the joint between the post-casting strip and the first and second ground beams, so that the water stop strip and the post-casting strip fit more closely.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention sets a reflux component, and drives the water-stop curtain to shake through a sensitive spring, so that water is discharged to the outside of the fixed frame through the overflow groove, thereby reducing the residual water between the fixed frame and the first and second ground beams to a certain extent, and reducing the probability of water spreading to the joints, thereby achieving a good water-stopping effect on the joints of the post-casting belt and reducing the corrosion of the steel bars inside the post-casting belt;

[0026] 2. The present invention provides a drainage component, expands the sealing sleeve through an elastic plate, squeezes and discharges the residual water in the cavity through the volume expansion of the sealing sleeve, increases the water discharge pressure, and reduces the probability of silt blockage in the overflow trough through the flow of water in the overflow trough, thereby ensuring the stability of the reflux component during operation;

[0027] 3. The present invention sets an extrusion component to extrude the waterstop strips at the joints on both sides of the post-cast strip and the ground beams one and two through two groups of top plates, thereby increasing the friction between the waterstop strip and the post-cast strip, further improving the contact tightness between the waterstop strip and the post-cast strip, and then effectively improving the sealing effect of the waterstop strip joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 AA section view in the figure;

[0030] Figure 3 For the present invention Figure 1BB section view in the figure;

[0031] Figure 4 For the present invention Figure 1 CC section view in the figure;

[0032] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure at D in the middle;

[0033] Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at E in the middle;

[0034] Figure 7 For the present invention Figure 4 The enlarged structural diagram at F in the middle;

[0035] Figure 8 For the present invention Figure 2 Schematic diagram of the enlarged structure at G in the middle.

[0036] In the figure: 11, ground beam 1; 12, fixing frame; 13, ground beam 2; 14, cover plate; 15, post-casting strip; 16, steel bar; 17, guide groove; 18, guide strip; 19, slot; 20, anchor rod; 21, extrusion plate; 22, limit block; 23, cavity; 24, partition; 25, water stop; 26, air cavity 1; 27, air cavity 2; 28, sealing block; 29, piston plate 1; 30, top plate; 31, piston Plate 2; 32. Through groove; 33. Arc plate; 34. Support plate; 35. Bracket; 36. Movable plate; 37. Water stop strip; 38. Rotating shaft; 39. Flap; 40. Expansion block; 41. Baffle 1; 42. Sealing sleeve; 43. Elastic plate; 44. Traction strip; 45. Connecting block; 46. Baffle 2; 47. Water stop curtain; 48. Sensitive spring; 49. Overflow groove; 50. Water-soluble block; 51. Water stop steel plate. DETAILED DESCRIPTION

[0037] The present invention will be described and illustrated in detail below in conjunction with the accompanying drawings.

[0038] Example 1

[0039] like Figure 1-8 As shown, the water-stop structure for building foundation comprises a ground beam 11 and a ground beam 13, a post-cast strip 15 is cast between the ground beam 11 and the ground beam 13, anchor rods 20 are arranged on both sides of the outer surface of the post-cast strip 15, a fixing frame 12 is clamped on both sides of the outer surface of the post-cast strip 15 through the anchor rods 20, a cavity 23 is opened at the bottom of the fixing frame 12, and a reflux component is arranged in the cavity 23;

[0040] The reflux component includes a baffle plate 41 fixedly connected to the lower end surfaces of ground beam 11 and ground beam 2 13, a sealing sleeve 42 is fixedly connected to the outer surface of the baffle plate 41, overflow grooves 49 are provided at both ends of the bottom of the outer surface of the fixing frame 12, a water-soluble stop block 50 is fixedly connected inside the overflow groove 49, a water-stop curtain 47 is fixedly connected to the side of the outer surface of the sealing sleeve 42 close to the overflow groove 49, the end of the water-stop curtain 47 away from the sealing sleeve 42 is fixedly connected to the inner surface of the cavity 23, the height of the connection between the water-stop curtain 47 and the sealing sleeve 42 is higher than the height of the connection between the water-stop curtain 47 and the cavity 23, the connection between the water-stop curtain 47 and the cavity 23 is arranged in conjunction with the bottom end of the overflow groove 49, the lower end surface of the water-stop curtain 47 is fixedly connected to a sensitive spring 48, and the lower end of the sensitive spring 48 is fixedly connected to the lower end of the inner surface of the cavity 23.

[0041] The material of the water-stop curtain 47 is flexible material, the number of the overflow grooves 49 is several groups and distributed in a linear array, a one-way valve is arranged inside the overflow groove 49, the cross-section of the sealing sleeve 42 is rectangular, and the material of the sealing sleeve 42 is elastic rubber material, the fixing frame 12 and the cavity 23 are U-shaped as a whole, and steel bars 16 are arranged inside the ground beam 11, the ground beam 2 13 and the post-cast strip 15.

[0042] By adopting the above technical scheme, during the construction of the building foundation, a post-cast strip 15 is usually set to separate the building foundation, thereby reducing the probability of harmful cracks in the cast-in-place concrete structure due to uneven temperature and shrinkage. Since the post-cast strip 15 and the original building foundation are cast in batches, there will be a certain gap, and rainwater and groundwater will penetrate into the interior of the building foundation through the gap, thereby causing corrosion and aging of the steel bars 16, affecting the service life of the building; by setting a reflux component, after the post-cast strip 15 is cast, the fixing frame 12 is clamped at the joints between the post-cast strip 15 and the ground beam 11 and the ground beam 2 13, and the fixing frame 12 is wrapped around the outside of the post-cast strip 15 to achieve a preliminary sealing effect on the joints, and the cavity 23 opened inside the fixing frame 12 is used to fix and support the sealing sleeve 42, and the sealing sleeve 42 cooperates with the fixing frame 12 to pull and support the water stop curtain 47. The building foundation such as the ground beam is usually buried in Underground, when groundwater seeps into the cavity 23 at the joint between the fixed frame 12 and the ground beam 1 11 and the ground beam 2 13, the groundwater will flow to the upper surface of the water-stop curtain 47. At this time, the water-stop curtain 47 will undergo elastic deformation under the action of the gravity of the water, and trigger the sensitive spring 48 through the water-stop curtain 47, so that the sensitive spring 48 drives the water-stop curtain 47 to shake, and the water on the surface of the water-stop curtain 47 will flow downward into the overflow groove 49. The water-soluble block 50 in the overflow groove 49 will dissolve in water and discharge the water to the outside of the fixed frame 12, thereby reducing the residual water between the fixed frame 12 and the ground beam 1 11 and the ground beam 2 13 to a certain extent, and reducing the probability of water diffusing to the joint, so as to have a good water-stopping effect on the joint between the post-cast strip 15 and the ground beam 1 11 and the ground beam 2 13. A one-way valve is arranged on the inside of the overflow groove 49, which can prevent external water from entering the cavity 23 through the overflow groove 49.

[0043] like Figure 2 and Figure 6 As shown, a drainage assembly is provided in the sealing sleeve 42, and the drainage assembly includes a baffle plate 2 46 fixedly connected to the inner surface of the sealing sleeve 42 near the water stop curtain 47, an elastic plate 43 is fixedly connected between the inner surface of the sealing sleeve 42 near the baffle plate 1 41 and the baffle plate 2 46, and traction strips 44 are fixedly connected on both sides of the inner surface of the elastic plate 43, and a connecting block 45 is fixedly connected between the two groups of traction strips 44.

[0044] The elastic plate 43 is in an arc shape, and the material of the connecting block 45 is a water-soluble material. Both ends of the outer surfaces of the ground beam 11 and the ground beam 2 13 are symmetrically fixedly connected with the arc plate 33 and the support plate 34 in cooperation with the fixing frame 12, and one end of the arc plate 33 and the support plate 34 away from the outer surfaces of the ground beam 11 and the ground beam 2 13 is fixedly connected to the fixing frame 12.

[0045] By adopting the above technical scheme, the ground beam 11 and the ground beam 2 13 fix and support the sealing sleeve 42 through the baffle 1 41, and the baffle 2 46 can improve the structural strength of the side wall of the sealing sleeve 42. The traction strip 44 on the inner side of the elastic plate 43 and the connecting block 45 traction and support the elastic plate 43, so that the elastic plate 43 maintains a certain bending shape. When the amount of water on the upper side of the water-stop curtain 47 is too much and cannot be discharged in time, part of the water will enter the sealing sleeve 42. At this time, the connecting block 45 dissolves in water, so that the two groups of traction strips 44 are out of contact. At this time, the elastic plate 43 changes from an arc shape to a straight line under the action of its own elastic force. The elastic plate 43 pushes the side of the sealing sleeve 42 through the baffle 2 46, so as to expand the sealing sleeve 42. The volume expansion of the sealing sleeve 42 squeezes and discharges the residual water in the cavity 23, increases the water discharge pressure, and then increases the drainage speed. The water flows in the overflow groove 49 to reduce the probability of sediment blockage in the overflow groove 49, thereby ensuring the stability of the reflux component during operation.

[0046] like Figure 5 As shown, brackets 35 are fixedly connected to both sides of the bottom of the inner surface of the cavity 23. The bracket 35 is U-shaped as a whole. Two groups of brackets 35 are respectively located at the joints of the post-cast strip 15 and the ground beam 11 and the ground beam 2 13. An extrusion component is arranged in the bracket 35. The extrusion component includes an air cavity 27 embedded in the bracket 35. A piston plate 29 is slidably connected to the inner surface of the air cavity 27. A sealing block 28 is fixedly connected to the middle part of the upper end of the piston plate 29. The sealing block 28 passes through the upper end of the bracket 35, and the sealing block 28 is slidably connected to the bracket 35.

[0047] An air cavity 26 is opened in the bracket 35, and the inner surface of the air cavity 26 is slidably connected to the piston plate 2 31, and the upper end surface of the piston plate 21 is fixedly connected to the top plate 30. The air cavity 1 26, the piston plate 2 31 and the top plate 30 are all in two groups and are symmetrically arranged on both sides of the air cavity 27. A water stop belt 25 is arranged on the upper end surface of the bracket 35, and the upper end surface of the water stop belt 25 is tightly fitted with the lower end surface of the post-casting belt 15. The air cavity 1 26 and the air cavity 2 27 are connected by a through groove 32. The lower end of the inner surface of the cavity 23 is fixedly connected to the partition 24, and the partition 24 is located between the drainage component and the extrusion component.

[0048] By adopting the above technical solution, the bracket 35 supports the water stop 25, and the water stop 25 is located just below the joint between the post-casting strip 15 and the ground beam 11 and the ground beam 2 13. The water stop 25 is used to seal the joint, thereby preventing water from entering the joint of the post-casting strip 15. The fixed frame 12 drives the bracket 35 to move upward so that its upper end surface is in contact with the lower surface of the post-casting strip 15. As the sealing block 28 pushes the water stop 25 to fit below the joint, the sealing block 28 will drive the piston plate 1 29 to move into the air cavity 27, thereby sealing the gas inside the air cavity 27. The gas in the air cavity 27 enters the air cavity 1 26 through the through groove 32, and the gas pressure in the air cavity 26 increases, thereby pushing the piston plate 21 to move upward, and then driving the top plate 30 to move upward synchronously. The two groups of top plates 30 move upward to squeeze the waterstop strips 25 on both sides of the joints between the post-cast strip 15 and the ground beams 1 11 and 2 13, thereby increasing the friction between the waterstop strips 25 and the post-cast strips 15, further improving the contact tightness between the waterstop strips 25 and the post-cast strips 15, and then effectively improving the sealing effect of the joints of the waterstop strips 25.

[0049] like Figure 4 and Figure 7 As shown, four groups of sealing components are arranged in the cavity 23, and the four groups of sealing components are respectively arranged at the joints on both sides of the post-cast strip 15 and the ground beam 1 11 and the ground beam 2 13. The sealing component includes a rotating shaft 38 rotatably connected to the lower end of the inner surface of the cavity 23, and the outer surface of the rotating shaft 38 is symmetrically fixedly connected with a flap 39. The inner surface of the cavity 23 is slidably connected with a movable plate 36 in cooperation with the flap 39. The movable plate 36 is fixedly connected with a waterstop strip 37 on the side wall away from the movable plate 36. The waterstop strip 37 is arranged at the joints on both sides of the post-cast strip 15 and the ground beam 1 11 and the ground beam 2 13. Waterstop steel plates 51 are fixedly arranged at the joints on both sides of the post-cast strip 15 and the ground beam 1 11 and the ground beam 2 13. The arc plate 33 and the support plate 34 are located on the opposite sides of the two groups of sealing components on the same side.

[0050] The inner surface of the cavity 23 is fixedly connected with an expansion block 40 in cooperation with the flap 39. The expansion blocks 40 are in several groups and distributed in a parallel array. The end of the expansion block 40 away from the fixed frame 12 is in sliding contact with the flap 39. The material of the expansion block 40 is an expansion rubber material. The flap 39 is in sliding contact with the movable plate 36.

[0051] By adopting the above technical solution, the cavity 23 supports the movable plate 36 for sliding, and the movable plate 36 drives the water stop strip 37 to fit the joint of the post-casting strip 15. When water gradually spreads upward inside the cavity 23, the expansion block 40 will absorb water and expand, and several groups of parallel expansion blocks 40 will push the flap 39 and the rotating shaft 38 to rotate. As the flap 39 gradually turns over, one end of the flap 39 contacts the inner wall of the cavity 23, and the other end of the flap 39 contacts the outer surface of the movable plate 36. 6 is sealed with the cavity 23, thereby further improving the sealing effect inside the cavity 23, the flap 39 can push the movable plate 36 and the water stop strip 37 to move to the side away from the flap 39, and the water stop strip 37 is pressed against the joint of the post-cast strip 15 through the movable plate 36, so that the water stop strip 37 and the post-cast strip 15 fit more closely, thereby being able to seal the joints on both sides of the surface of the post-cast strip 15, further reducing the corrosion of water to the internal structure of the building foundation, and the water stop steel plate 51 can improve the water stopping effect inside the joint.

[0052] like Figure 1 and Figure 8 As shown, a clamping assembly is provided at the top of the outer side of the fixing frame 12, and the clamping assembly includes a guide bar 18 fixedly connected to the top of both ends of the outer surface of the post-casting strip 15, and the upper end surface of the fixing frame 12 is slidably connected to the cover plate 14, and the cover plate 14 is in an inverted U shape as a whole, and guide grooves 17 are provided on both sides of the inner surface of the cover plate 14, and the guide bar 18 is slidably arranged in the guide groove 17, and the anchor rod 20 is in an L shape as a whole, and slots 19 are provided at both ends of the inner surface of the fixing frame 12, and the anchor rod 20 is clamped in the slot 19, and the upper end of the inner surface of the slot 19 is fixedly connected to a limiting block 22, and the limiting block 22 is fixedly connected to a side of the limiting block 22 close to the anchor rod 20 with an extrusion plate 21, and the extrusion plate 21 is in an arc shape as a whole, and the extrusion plate 21 is tightly fitted with the anchor rod 20.

[0053] By adopting the above technical scheme, the post-cast strip 15 slidingly supports the cover plate 14 through the guide strip 18 and the guide groove 17, so that the cover plate 14 is clamped on the upper end surface of the post-cast strip 15, and the cover plate 14 can cover the joint on the upper part of the post-cast strip 15 to reduce the probability of soil penetrating into the joint of the post-cast strip 15. When the post-cast strip 15 is poured, the anchor rod 20 is poured simultaneously, and the anchor rod 20 is clamped in the inside of the clamping groove 19 to support the fixing frame 12, so that the fixing frame 12 can be quickly installed and fixed. The limit block 22 in the clamping groove 19 can limit the anchor rod 20. The limit block 22 applies a certain pressure to the anchor rod 20 through the extrusion plate 21, so as to ensure the firmness of the anchor rod 20 during the clamping process and reduce the probability of accidental loosening of the fixing frame 12.

[0054] like Figure 1-8As shown, the construction method of the water-stop structure for building foundation comprises the following steps:

[0055] S1: clamp the fixing frame 12 at the joints between the post-casting belt 15 and the first and second ground beams 11 and 13, and initially seal the joints by covering the fixing frame 12 on the outside of the post-casting belt 15;

[0056] S2: When water penetrates into the joint, the sensitive spring 48 drives the water-stop curtain 47 to shake under the action of the gravity of the water, so that the water on the surface of the water-stop curtain 47 is discharged outward through the overflow groove 49;

[0057] S3: The sealing sleeve 42 is expanded by the elastic plate 43, and the residual water in the cavity 23 is squeezed out by the volume expansion of the sealing sleeve 42, thereby reducing the residual water in the joint;

[0058] S4: The top plate 30 is driven to move upward synchronously by the second piston plate 31, and the water stop strips 25 on both sides of the joint of the post-casting strip 15 are squeezed by the two groups of top plates 30, and the sealing block 28 is used to make the water stop strip 25 closely fit the lower end surfaces of the post-casting strip 15, the first ground beam 11 and the second ground beam 13;

[0059] S5: When one end of the flap 39 contacts the inner wall of the cavity 23, the other end of the flap 39 contacts the lower end surface of the movable plate 36, and the flap 39 is used to seal between the movable plate 36 and the cavity 23;

[0060] S6: The flap 39 pushes the movable plate 36 and the water stop strip 37 to move toward the side of the post-cast strip 15, and the movable plate 36 presses the water stop strip 37 against the joint between the post-cast strip 15 and the ground beam 1 11 and the ground beam 2 13, so that the water stop strip 37 and the post-cast strip 15 fit more closely.

Claims

1. A water-stop structure for a building foundation, comprising a first ground beam (11) and a second ground beam (13), characterized in that: A post-cast strip (15) is cast between the first ground beam (11) and the second ground beam (13), anchor rods (20) are arranged on both sides of the outer surface of the post-cast strip (15), a fixing frame (12) is clamped on both sides of the outer surface of the post-cast strip (15) through the anchor rods (20), a cavity (23) is opened at the bottom of the fixing frame (12), and a reflux component is arranged in the cavity (23); The reflux assembly comprises a baffle plate 1 (41) fixedly connected to the lower end surfaces of the first ground beam (11) and the second ground beam (13); a sealing sleeve (42) is fixedly connected to the outer surface of the baffle plate 1 (41); overflow grooves (49) are provided at both ends of the bottom of the outer surface of the fixing frame (12); a water-soluble stopper (50) is fixedly connected inside the overflow groove (49); a water-stopping curtain (47) is fixedly connected to the outer surface of the sealing sleeve (42) on one side close to the overflow groove (49); the water-stopping curtain (47) One end away from the sealing sleeve (42) is fixedly connected to the inner surface of the cavity (23); the height of the connection between the water-stop curtain (47) and the sealing sleeve (42) is higher than the height of the connection between the water-stop curtain (47) and the cavity (23); the connection between the water-stop curtain (47) and the cavity (23) is arranged in coordination with the bottom end of the overflow groove (49); the lower end surface of the water-stop curtain (47) is fixedly connected to a sensitive spring (48); the lower end of the sensitive spring (48) is fixedly connected to the lower end of the inner surface of the cavity (23); The water-stop curtain (47) is made of a flexible material, the overflow grooves (49) are provided in a plurality of groups and are arranged in a linear array, a one-way valve is provided inside the overflow groove (49), the sealing sleeve (42) has a rectangular cross-section, the sealing sleeve (42) is made of an elastic rubber material, the fixing frame (12) and the cavity (23) are both U-shaped as a whole, and steel bars (16) are provided inside the first ground beam (11), the second ground beam (13) and the post-casting strip (15); A drainage assembly is arranged in the sealing sleeve (42), and the drainage assembly comprises a second baffle plate (46) fixedly connected to a side of the inner surface of the sealing sleeve (42) close to the water-stop curtain (47), an elastic plate (43) is fixedly connected between the inner surface of the sealing sleeve (42) close to the first baffle plate (41) and the second baffle plate (46), traction strips (44) are fixedly connected to both sides of the inner surface of the elastic plate (43), and a connecting block (45) is fixedly connected between two groups of the traction strips (44).

2. The water-stopping structure for building foundation according to claim 1, characterized in that: The elastic plate (43) is in an arc shape, the connecting block (45) is made of a water-soluble material, both ends of the outer surfaces of the first ground beam (11) and the second ground beam (13) are symmetrically fixedly connected to the fixed frame (12) with the arc plate (33) and the support plate (34), and one end of the arc plate (33) and the support plate (34) away from the outer surfaces of the first ground beam (11) and the second ground beam (13) is fixedly connected to the fixed frame (12).

3. The water-stopping structure for building foundation according to claim 2, characterized in that: Brackets (35) are fixedly connected to both sides of the bottom of the inner surface of the cavity (23); the brackets (35) are U-shaped as a whole; two groups of brackets (35) are respectively located at the joints between the post-cast strip (15) and the first ground beam (11) and the second ground beam (13); an extrusion assembly is arranged in the bracket (35); the extrusion assembly includes an air cavity (27) embedded in the bracket (35); a piston plate (29) is slidably connected to the inner surface of the air cavity (27); a sealing block (28) is fixedly connected to the middle of the upper end of the piston plate (29); the sealing block (28) passes through the upper end of the bracket (35), and the sealing block (28) is slidably connected to the bracket (35).

4. The water-stopping structure for building foundation according to claim 3, characterized in that: An air cavity (26) is provided in the bracket (35), and the inner surface of the air cavity (26) is slidably connected to the piston plate (31), and the upper end surface of the piston plate (31) is fixedly connected to the top plate (30). The air cavity (26), the piston plate (31) and the top plate (30) are each in two groups and are symmetrically arranged on both sides of the air cavity (27). A water stop strip (25) is provided on the upper end surface of the bracket (35), and the upper end surface of the water stop strip (25) is tightly fitted with the lower end surface of the post-casting strip (15). The air cavity (26) and the air cavity (27) are connected by a through groove (32), and the lower end of the inner surface of the cavity (23) is fixedly connected to a partition (24), and the partition (24) is located between the drainage component and the extrusion component.

5. The water-stopping structure for building foundation according to claim 4, characterized in that: Four groups of sealing components are arranged in the cavity (23), and the four groups of sealing components are respectively arranged at the joints on both sides of the post-casting strip (15) and the first ground beam (11) and the second ground beam (13). The sealing components include a rotating shaft (38) rotatably connected to the lower end of the inner surface of the cavity (23), and the outer surface of the rotating shaft (38) is symmetrically fixedly connected to a flap (39). The inner surface of the cavity (23) is slidably connected to a movable plate (36) in cooperation with the flap (39). A water stop strip (37) is fixedly connected to the side wall of the movable plate (36) away from the flap (39), and the water stop strip (37) is arranged at the joints on both sides of the post-cast strip (15) and the first ground beam (11) and the second ground beam (13). Water stop steel plates (51) are fixedly arranged at the joints on both sides of the post-cast strip (15) and the first ground beam (11) and the second ground beam (13). The arc plate (33) and the support plate (34) are located on opposite sides of the two sets of sealing components on the same side.

6. The water-stopping structure for building foundation according to claim 5, characterized in that: The inner surface of the cavity (23) is fixedly connected with an expansion block (40) in cooperation with the flap (39); the expansion blocks (40) are provided in a plurality of groups and are distributed in a parallel array; one end of the expansion block (40) away from the fixing frame (12) is in sliding contact with the flap (39); the expansion block (40) is made of an expansion rubber material; and the flap (39) is in sliding contact with the movable plate (36).

7. The water-stopping structure for building foundation according to claim 6, characterized in that: A clamping assembly is provided at the top of the outer side of the fixing frame (12), and the clamping assembly includes guide strips (18) fixedly connected to the tops of both ends of the outer surface of the post-cast strip (15). The upper end surface of the fixing frame (12) is slidably connected to a cover plate (14), and the cover plate (14) is in an inverted U shape as a whole. Guide grooves (17) are provided on both sides of the inner surface of the cover plate (14), and the guide strips (18) are slidably arranged in the guide grooves (17). The anchor rod (20) is in an L shape as a whole. A clamping groove (19) is provided at both ends of the inner surface of the fixing frame (12), and the anchor rod (20) is clamped in the clamping groove (19). The upper end of the inner surface of the clamping groove (19) is fixedly connected to a limiting block (22), and a side of the limiting block (22) close to the anchor rod (20) is fixedly connected to an extrusion plate (21), and the extrusion plate (21) is in an arc shape as a whole, and the extrusion plate (21) is tightly fitted with the anchor rod (20).

8. A construction method using the water-stop structure for building foundation according to any one of claims 5 to 7, characterized in that: The steps include: S1: clamping the fixing frame (12) at the joints between the post-casting strip (15) and the first ground beam (11) and the second ground beam (13), and preliminarily sealing the joints by wrapping the fixing frame (12) around the outside of the post-casting strip (15); S2: When water penetrates into the joint, the sensitive spring (48) drives the water-stop curtain (47) to vibrate under the action of the gravity of the water, thereby discharging the water on the surface of the water-stop curtain (47) outward through the overflow groove (49); S3: expanding the sealing sleeve (42) through the elastic plate (43), squeezing out the residual moisture in the cavity (23) through the volume expansion of the sealing sleeve (42), thereby reducing the residual moisture at the joint; S4: The top plate (30) is driven to move upward synchronously by the second piston plate (31), and the water stop strips (25) on both sides of the joint of the post-cast strip (15) are squeezed by the two sets of top plates (30), and the sealing block (28) is cooperated to make the water stop strip (25) closely fit the lower end surfaces of the post-cast strip (15), the first ground beam (11) and the second ground beam (13); S5: When one end of the flap (39) contacts the inner wall of the cavity (23), the other end of the flap (39) contacts the lower end surface of the movable plate (36), and a seal is performed between the movable plate (36) and the cavity (23) through the flap (39); S6: The flap (39) pushes the movable plate (36) and the water stop strip (37) to move toward one side of the post-cast strip (15), and the movable plate (36) presses the water stop strip (37) against the joint between the post-cast strip (15) and the first ground beam (11) and the second ground beam (13), so that the water stop strip (37) and the post-cast strip (15) are more closely attached.

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